(19)
(11)EP 3 158 002 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
06.05.2020 Bulletin 2020/19

(21)Application number: 14740054.3

(22)Date of filing:  20.06.2014
(51)Int. Cl.: 
C08L 67/02  (2006.01)
C08L 23/08  (2006.01)
C08L 69/00  (2006.01)
C08K 7/14  (2006.01)
(86)International application number:
PCT/US2014/043453
(87)International publication number:
WO 2015/195143 (23.12.2015 Gazette  2015/51)

(54)

REINFORCED THERMOPLASTIC COMPOUND WITH CHEMICAL RESISTANCE

VERSTÄRKTE THERMOPLASTISCHE VERBINDUNG MIT CHEMISCHER BESTÄNDIGKEIT

COMPOSÉ THERMOPLASTIQUE RENFORCÉ PRÉSENTANT UNE RÉSISTANCE CHIMIQUE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 19.06.2014 US 201414309550

(43)Date of publication of application:
26.04.2017 Bulletin 2017/17

(73)Proprietor: SABIC Global Technologies B.V.
4612 PX Bergen op Zoom (NL)

(72)Inventors:
  • SUN, Xiaoyu
    475 Creamery Way, Pennsylvania 19341 (US)
  • HE, Yuanqing
    Newburgh, Indiana 47630 (US)

(74)Representative: Agasse, Stéphane et al
Cabinet GERMAIN & MAUREAU B.P. 6153
69466 Lyon Cedex 06
69466 Lyon Cedex 06 (FR)


(56)References cited: : 
WO-A1-2005/071012
US-A- 4 515 918
WO-A1-2007/089598
US-A1- 2013 298 427
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    BACKGROUND



    [0001] Many consumer oriented industries, e.g. the consumer electronics industry, have a critical need for blended thermoplastic compositions that provide very high stiffness with balanced impact resistance, are colorable from white to black, chemically resistant to everyday chemicals (and even strong acids and bases), possess excellent flow for thin wall processing, and transparent to wireless signals. In order to meet the requirements of the manufacture of desired articles in various consumer oriented industries, including the consumer electronics industry, current blended thermoplastic materials utilize use high flow crystalline resins such as polyether ether ketone polymers ("PEEK") or specialty nylon with glass reinforcing fibers to provide sufficient stiffness and impact resistance. Materials containing PEEK desirably have low dielectric interference to wireless signals. However, none of these resins are colorable to white, that limits their use to structural elements that either are not visible or where visible they require a secondary over-molding to achieve appropriate aesthetics.

    [0002] It would be desirable to utilize blends comprising polycarbonate ("PC") and polybutylene terephthalate ("PBT") in applications currently utilizing blended thermoplastic compositions with glass fiber reinforced PEEK or specialty nylon. PC/PBT blends could offer a desired balance of ductility, ultra high stiffness, low dielectric constants, and colorable in a manner to achieve desired aesthetics.

    [0003] Despite significant research and development efforts, there remains a need for blended thermoplastic compositions that effectively address the appropriate balance of properties required in the consumer electronics industry, i.e. blended thermoplastic compositions that are ductile yet have very high stiffness, while retaining desired dielectric properties and are colorable from white to black.

    [0004] WO 2005/071012 discloses a thermoplastic vulcanizate as an impact modifier for a polyester/polycarbonate blend. The thermoplastic vulcanizate is a blend of a polyolefin and a rubber, in which the rubber is fully, partially, or dynamically cross-linked. Example 3 pertains to a thermoplastic composition including 29.29 wt% polybutylene terephthalate, 29.29 wt% polycarbonate, 0.653 wt% acrylic impact modifier, 1.07 Wt% polymer matrix compatibilizer, 4.875 wt% partially crosslinked thermoplastic vulcanizate as elastomeric compatibilizer, and 32 wt% glass fibers.

    [0005] WO 2007/089598 discloses a molding composition comprising 35 to 50 wt% of a modified polybutylene terephthalate random copolymer, 25 to 45 wt% of a filler component, 10 to 30 wt% of polycarbonate, from 0 to 10 wt% of an impact modifier, and from 0 to 5 wt% of an additive.

    SUMMARY



    [0006] The present disclosure relates to blended thermoplastic compositions comprising at least one polycarbonate component, at least one polybutylene component, at least one polyester ether elastomer component, at least one poly(ethylene-co-ethylacrylate) component, at least one ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component, and at least one glass fiber component. The resulting compositions can be used in the manufacture of articles requiring materials that have high impact strength yet have very high stiffness, while retaining desired dielectric properties.

    [0007] In one embodiment, the disclosure relates to blended thermoplastic compositions comprising: (a) from 5 weight percent (wt%) to 25 wt% of a polycarbonate component; (b) from 20 wt% to 50 wt% of a polybutylene terephthalate component; (c) from greater than 0 wt% to 5 wt% of a compatibilizer such as polyester ether elastomer component; (d) from greater than 0 wt% to 5 wt% of an impact modifier such as poly(ethylene-co-ethylacrylate) component; (e) from greater than 0 wt% to 3 wt% of a compatibilizer such as ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component; and (f) from greater than 0 wt% to 60 wt% of a glass fiber component; wherein the wt% ratio of the polycarbonate component to polybutylene terephthalate component is less than or equal to 0.5; wherein the combined weight percent value of all components does not exceed 100 wt%; and wherein all weight percent values are based on the total weight of the composition.

    [0008] In various further embodiments, the disclosure relates to articles comprising the disclosed compositions.

    [0009] In a further embodiment, the disclosure relates to methods of making the disclosed compositions.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0010] The accompanying figures, which are incorporated in and constitute a part of this specification, illustrate several embodiments and together with the description serve to explain the principles of the disclosure.

    Figure 1 shows representative micrographs obtained by scanning electron microscopy ("SEM") of representative blended thermoplastic compositions of the present disclosure before and after treatment with diethylenetriamine ("DETA"). (Panel A) a molded part formed from formulation 9 × 11427 prior to DETA treatment; (Panel B) a molded part formed from formulation 9X11427 after DETA treatment for 24 hr; (Panel C) a molded part formed from formulation Example 2 prior to DETA treatment; and (Panel D) a molded part formed from formulation Example 2 after DETA treatment for 24 hr.

    Figure 2 shows representative micrographs obtained by transmission electron microscopy (TEM). The micrographs were obtained from a molded sample prepared using formulation Example 1 without glass fiber. (Panel A) magnification at 2,000x; (Panel B) magnification at 5,000x; (Panel C) magnification at 10,000x; (Panel D) magnification at 25,000x; and (Panel E) shows annotation as indicated to the same sample as shown in Panel D.

    Figure 3 shows representative micrographs obtained by transmission electron microscopy (TEM). The micrographs were obtained from a molded sample prepared using formulation Example 1 with 22 wt% glass fiber. (Panel A) magnification at 2,000x, and it should be noted that the large circles edged with very dark marked indicated with "GF" represent cross section of glass fiber; (Panel B) magnification at 5,000x, and it should be noted that the large circles edged with very dark marked indicated with "GF" represent cross section of glass fiber; (Panel C) magnification at 10,000x; (Panel D) magnification at 25,000x; and (Panel E) shows annotation as indicated to the same sample as shown in Panel D.

    Figure 4 shows representative dielectric properties (i.e. the dielectric constant, dk, as a function of frequency) obtained for molded samples prepared from the formulations indicated in the legend shown with the graphical data.

    Figure 5 shows representative dielectric properties (i.e. the dissipation factor, df, as a function of frequency) obtained for molded samples prepared from the formulations indicated in the legend shown with the graphical data.

    Figure 6 shows SEM images.

    Figures 7 and 8 show the dielectric properties of representative disclosed blended thermoplastic compositions.


    DETAILED DESCRIPTION



    [0011] The present disclosure can be understood more readily by reference to the following detailed description of the disclosure and the Examples included therein.

    [0012] As used herein, the term "combination" is inclusive of blends, mixtures, alloys, reaction products, and the like.

    [0013] As used herein, the terms "optional" or "optionally" means that the subsequently described event or circumstance can or cannot occur, and that the description includes instances where said event or circumstance occurs and instances where it does not. For example, the phrase "optionally substituted alkyl" means that the alkyl group can or cannot be substituted and that the description includes both substituted and unsubstituted alkyl groups.

    [0014] References in the specification and concluding claims to parts by weight (pbw) of a particular element or component in a composition or article, denotes the weight relationship between the element or component and any other elements or components in the composition or article for which a part by weight is expressed. Thus, in a compound containing 2 parts by weight of component X and 5 parts by weight component Y, X and Y are present at a weight ratio of 2:5, and are present in such ratio regardless of whether additional components are contained in the compound.

    [0015] As used herein, the term "chemically resistant" can mean resistant to strong acids and cosmetic chemicals. As an example, term "chemically resistant" can mean resitant to oxidizing acids at high concentrations.

    [0016] As used herein the terms "weight percent," "wt%," and "wt. %," which can be used interchangeably, indicate the percent by weight of a given component based on the total weight of the composition, unless otherwise specified. That is, unless otherwise specified, all wt% values are based on the total weight of the composition. It should be understood that the sum of wt% values for all components in a disclosed composition or formulation are equal to 100.

    [0017] Compounds are described using standard nomenclature. For example, any position not substituted by any indicated group is understood to have its valence filled by a bond as indicated, or a hydrogen atom. A dash ("-") that is not between two letters or symbols is used to indicate a point of attachment for a substituent. For example, -CHO is attached through carbon of the carbonyl group. Unless defined otherwise, technical and scientific terms used herein have the same meaning as is commonly understood by one of skill in the art to which this disclosure belongs.

    [0018] The term "alkyl group" as used herein is a branched or unbranched saturated hydrocarbon group of 1 to 24 carbon atoms, such as methyl, ethyl, n propyl, isopropyl, n butyl, isobutyl, t butyl, pentyl, hexyl, heptyl, octyl, decyl, tetradecyl, hexadecyl, eicosyl, tetracosyl and the like. A "lower alkyl" group is an alkyl group containing from one to six carbon atoms.

    [0019] The term "aryl group" as used herein is any carbon-based aromatic group including, but not limited to, benzene, naphthalene, etc. The term "aromatic" also includes "heteroaryl group," which is defined as an aromatic group that has at least one heteroatom incorporated within the ring of the aromatic group. Examples of heteroatoms include, but are not limited to, nitrogen, oxygen, sulfur, and phosphorus. The aryl group can be substituted or unsubstituted. The aryl group can be substituted with one or more groups including, but not limited to, alkyl, alkynyl, alkenyl, aryl, halide, nitro, amino, ester, ketone, aldehyde, hydroxy, carboxylic acid, or alkoxy.

    [0020] The term "aralkyl" as used herein is an aryl group having an alkyl, alkynyl, or alkenyl group as defined above attached to the aromatic group. An example of an aralkyl group is a benzyl group.

    [0021] The term "carbonate group" as used herein is represented by the formula OC(O)OR, where R can be hydrogen, an alkyl, alkenyl, alkynyl, aryl, aralkyl, cycloalkyl, halogenated alkyl, or heterocycloalkyl group described above.

    [0022] The term "organic residue" defines a carbon containing residue, i.e., a residue comprising at least one carbon atom, and includes but is not limited to the carbon-containing groups, residues, or radicals defined hereinabove. Organic residues can contain various heteroatoms, or be bonded to another molecule through a heteroatom, including oxygen, nitrogen, sulfur, phosphorus, or the like. Examples of organic residues include but are not limited alkyl or substituted alkyls, alkoxy or substituted alkoxy, mono or di-substituted amino, amide groups, etc. Organic residues can preferably comprise 1 to 18 carbon atoms, 1 to 15, carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, 1 to 6 carbon atoms, or 1 to 4 carbon atoms. In a further embodiment, an organic residue can comprise 2 to 18 carbon atoms, 2 to 15, carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, 2 to 4 carbon atoms, or 2 to 4 carbon atoms.

    [0023] A very close synonym of the term "residue" is the term "radical," which as used in the specification and concluding claims, refers to a fragment, group, or substructure of a molecule described herein, regardless of how the molecule is prepared. For example, a 2,4-dihydroxyphenyl radical in a particular compound has the structure:

    regardless of whether 2,4-dihydroxyphenyl is used to prepare the compound. In some embodiments the radical (for example an alkyl) can be further modified (i.e., substituted alkyl) by having bonded thereto one or more "substituent radicals." The number of atoms in a given radical is not critical to the present disclosure unless it is indicated to the contrary elsewhere herein.

    [0024] "Organic radicals," as the term is defined and used herein, contain one or more carbon atoms. An organic radical can have, for example, 1 to 26 carbon atoms, 1 to 18 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, 1 to 6 carbon atoms, or 1 to 4 carbon atoms. In a further embodiment, an organic radical can have 2 to 26 carbon atoms, 2 to 18 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, 2 to 6 carbon atoms, or 2 to 4 carbon atoms. Organic radicals often have hydrogen bound to at least some of the carbon atoms of the organic radical. One example, of an organic radical that comprises no inorganic atoms is a 5, 6, 7, 8-tetrahydro-2-naphthyl radical. In some embodiments, an organic radical can contain 1 to 10 inorganic heteroatoms bound thereto or therein, including halogens, oxygen, sulfur, nitrogen, phosphorus, and the like. Examples of organic radicals include but are not limited to an alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, monosubstituted amino, di-substituted amino, acyloxy, cyano, carboxy, carboalkoxy, alkylcarboxamide, substituted alkylcarboxamide, dialkylcarboxamide, substituted dialkylcarboxamide, alkylsulfonyl, alkylsulfinyl, thioalkyl, thiohaloalkyl, alkoxy, substituted alkoxy, haloalkyl, haloalkoxy, aryl, substituted aryl, heteroaryl, heterocyclic, or substituted heterocyclic radicals, wherein the terms are defined elsewhere herein. A few non-limiting examples of organic radicals that include heteroatoms include alkoxy radicals, trifluoromethoxy radicals, acetoxy radicals, dimethylamino radicals and the like.

    [0025] As used herein, the terms "number average molecular weight" or "Mn" can be used interchangeably, and refer to the statistical average molecular weight of all the polymer chains in the sample and is defined by the formula:

    where Mi is the molecular weight of a chain and Ni is the number of chains of that molecular weight. Mn can be determined for polymers, e.g., polycarbonate polymers, by methods well known to a person having ordinary skill in the art using molecular weight standards, e.g. polycarbonate standards or polystyrene standards, preferably certified or traceable molecular weight standards.

    [0026] As used herein, the terms "weight average molecular weight" or "Mw" can be used interchangeably, and are defined by the formula:

    where Mi is the molecular weight of a chain and Ni is the number of chains of that molecular weight. Compared to Mn, Mw takes into account the molecular weight of a given chain in determining contributions to the molecular weight average. Thus, the greater the molecular weight of a given chain, the more the chain contributes to the Mw. Mw can be determined for polymers, e.g. polycarbonate polymers, by methods well known to a person having ordinary skill in the art using molecular weight standards, e.g. polycarbonate standards or polystyrene standards, preferably certified or traceable molecular weight standards.

    [0027] As used herein, the terms "polydispersity index" or "PDI" can be used interchangeably, and are defined by the formula:

    The PDI has a value equal to or greater than 1, but as the polymer chains approach uniform chain length, the PDI approaches unity.

    [0028] The terms "BisA, " "BPA," or "bisphenol A," which can be used interchangeably, as used herein refers to a compound having a structure represented by the formula:

    BisA can also be referred to by the name 4,4'-(propane-2,2-diyl)diphenol; p,p'-isopropylidenebisphenol; or 2,2-bis(4-hydroxyphenyl)propane.. BisA has the Chemical Abstracts Service ("CAS") number 80-05-7.

    [0029] As used herein, "polycarbonate" refers to an oligomer or polymer comprising residues of one or more dihydroxy compounds, e.g., dihydroxy aromatic compounds, joined by carbonate linkages; it also encompasses homopolycarbonates, copolycarbonates, and (co)polyester carbonates.

    [0030] The terms "residues" and "structural units", used in reference to the constituents of the polymers, are synonymous throughout the specification.

    [0031] Each of the materials disclosed herein are either commercially available and/or the methods for the production thereof are known to those of skill in the art.

    [0032] As briefly described above, the present disclosure relates to blended thermoplastic compositions comprising at least one polycarbonate component, at least one polybutylene component, at least one polyester ether elastomer component, at least one poly(ethylene-co-ethylacrylate) component, at least one ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component, and at least one glass fiber component. The resulting compositions can be used in the manufacture of articles requiring materials that have robust impact strength yet have very high stiffness, while retaining desired dielectric properties and are colorable from white to black.

    [0033] In one embodiment, the disclosure relates to blended thermoplastic compositions comprising: (a) from 5 wt% to 25 wt% of a polycarbonate component; (b) from 20 wt% to 50 wt% of a polybutylene terephthalate component; (c) from greater than 0 wt% to 5 wt% of a compatibilizer such as a polyester ether elastomer component; (d) from greater than 0 wt% to 5 wt% of an impact modifier such as poly(ethylene-co-ethylacrylate) component; (e) from greater than 0 wt% to 3 wt% of a compatibilizer such as an ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component; and (f) from greater than 0 wt% to 60 wt% of a glass fiber component; wherein the wt% ratio of the polycarbonate component to polybutylene terephthalate component is less than or equal to 0.5; wherein the combined weight percent value of all components does not exceed 100 wt%; and wherein all weight percent values are based on the total weight of the composition.

    [0034] In a further embodiment, the disclosure relates to blended thermoplastic compositions comprising: (a) from 6 wt% to 13 wt% of a polycarbonate component; (b) from 25 wt% to 45 wt% of a polybutylene terephthalate component; (b) from greater than 1.7 wt% to 3.2 wt% of a polyester ether elastomer component; (c) from greater than 1.3 wt% to 3.1 wt% of an poly(ethylene-co-ethylacrylate) component; (d) from greater than 0.7 wt% to 1.6 wt% of an ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component; and (f) from greater than 25 wt% to 45 wt% of a glass fiber component; wherein the wt% ratio of the polycarbonate component to polybutylene terephthalate component is less than or equal to 0.5; wherein the combined weight percent value of all components does not exceed 100 wt%; and wherein all weight percent values are based on the total weight of the composition.

    [0035] In a further embodiment, the disclosure relates to blended thermoplastic compositions comprising: (a) from 6 wt% to 10 wt% of a polycarbonate component; (b) from 25 wt% to 35 wt% of a polybutylene terephthalate component; (c) from greater than 1.7 wt% to 3.2 wt% of a polyester ether elastomer component; (d) from greater than 1.3 wt% to 2.4 wt% of an poly(ethylene-co-ethylacrylate) component; (e) from greater than 0.7 wt% to 1.2 wt% of an ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component; and (f) from greater than 40 wt% to 60 wt% of a glass fiber component; wherein the wt% ratio of the polycarbonate component to polybutylene terephthalate component is less than or equal to 0.5; wherein the combined weight percent value of all components does not exceed 100 wt%; and wherein all weight percent values are based on the total weight of the composition.

    [0036] In a further embodiment, the disclosure relates to blended thermoplastic compositions comprising: (a) from 5 wt% to 25 wt% of a polycarbonate component; (b) from 20 wt% to 50 wt% of a polybutylene terephthalate component; (c) from greater than 0 wt% to 5 wt% of a polyester ether elastomer component; (d) from greater than 0 wt% to 5 wt% of an poly(ethylene-co-ethylacrylate) component; (e) from greater than 0 wt% to 3 wt% of an ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component; and (f) from greater than 0 wt% to 60 wt% of a glass fiber component; wherein the wt% ratio of the polycarbonate component to polybutylene terephthalate component is less than or equal to 0.5; wherein the combined weight percent value of all components does not exceed 100 wt%; wherein all weight percent values are based on the total weight of the composition; wherein a molded sample of the blended thermoplastic composition has notched Izod impact strength greater than or equal to 140 joules per meter (J/m) when determined in accordance with ASTM D256; and wherein a molded sample of the blended thermoplastic composition has a dielectric constant less than or equal to 4.0 when determined in accordance with ASTM D2520.

    [0037] In a further embodiment, the disclosure relates to blended thermoplastic compositions comprising: (a) from 6 wt% to 13 wt% of a polycarbonate component; (b) from 25 wt% to 45 wt% of a polybutylene terephthalate component; (c) from greater than 1.7 wt% to 3.2 wt% of a polyester ether elastomer component; (d) from greater than 1.3 wt% to 3.1 wt% of an poly(ethylene-co-ethylacrylate) component; (e) from greater than 0.7 wt% to 1.6 wt% of an ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component; and (f) from greater than 25 wt% to 45 wt% of a glass fiber component; wherein the wt% ratio of the polycarbonate component to polybutylene terephthalate component is less than or equal to 0.5; wherein the combined weight percent value of all components does not exceed 100 wt%; wherein all weight percent values are based on the total weight of the composition; wherein a molded sample of the blended thermoplastic composition has notched Izod impact strength greater than or equal to 140 J/m when determined in accordance with ASTM D256; and wherein a molded sample of the blended thermoplastic composition has a dielectric constant less than or equal to 4.0 when determined in accordance with ASTM D2520.

    [0038] In a further embodiment, the disclosure relates to blended thermoplastic compositions comprising: (a) from 6 wt% to 10 wt% of a polycarbonate component; (b) from 25 wt% to 35 wt% of a polybutylene terephthalate component; (c) from greater than 1.7 wt% to 3.2 wt% of a polyester ether elastomer component; (d) from greater than 1.3 wt% to 2.4 wt% of an poly(ethylene-co-ethylacrylate) component; (e) from greater than 0.7 wt% to 1.2 wt% of an ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component; and (f) from greater than 40 wt% to 60 wt% of a glass fiber component; wherein the wt% ratio of the polycarbonate component to polybutylene terephthalate component is less than or equal to 0.5; wherein the combined weight percent value of all components does not exceed 100 wt%; wherein all weight percent values are based on the total weight of the composition; wherein a molded sample of the blended thermoplastic composition has notched Izod impact strength greater than or equal to 140 J/m when determined in accordance with ASTM D256; and wherein a molded sample of the blended thermoplastic composition has a dielectric constant less than or equal to 4.0 when determined in accordance with ASTM D2520.

    [0039] In a further embodiment, the disclosure relates to blended thermoplastic compositions comprising: (a) from 5 wt% to 25 wt% of a polycarbonate component; (b) from 20 wt% to 50 wt% of a polybutylene terephthalate component; (c) from greater than 0 wt% to 5 wt% of a polyester ether elastomer component; (d) from greater than 0 wt% to 5 wt% of an poly(ethylene-co-ethylacrylate) component; (e) from greater than 0 wt% to 3 wt% of an ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component; (f) from greater than 0 wt% to 60 wt% of a glass fiber component; (g) from greater than 0 wt% to 2 wt% of a transesterification quencher; and (h) from greater than 0 wt% to 5 wt% of an epoxy hydrostabilizer agent; wherein the wt% ratio of the polycarbonate component to polybutylene terephthalate component is less than or equal to 0.5; wherein the combined weight percent value of all components does not exceed 100 wt%; and wherein all weight percent values are based on the total weight of the composition.

    [0040] In a further embodiment, the disclosure relates to blended thermoplastic compositions comprising: (a) from 6 wt% to 13 wt% of a polycarbonate component; (b) from 25 wt% to 45 wt% of a polybutylene terephthalate component; (c) from greater than 1.7 wt% to 3.2 wt% of a polyester ether elastomer component; (d) from greater than 1.3 wt% to 3.1 wt% of an poly(ethylene-co-ethylacrylate) component; (e) from greater than 0.7 wt% to 1.6 wt% of an ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component; (f) from greater than 25 wt% to 45 wt% of a glass fiber component; (g) from 0.05 wt% to 0.5 wt% of a transesterification quencher; and (h) from greater than 1.0 wt% to 2.5 wt% of an epoxy hydrostabilizer agent; wherein the wt% ratio of the polycarbonate component to polybutylene terephthalate component is less than or equal to 0.5; wherein the combined weight percent value of all components does not exceed 100 wt%; and wherein all weight percent values are based on the total weight of the composition.

    [0041] In a further embodiment, the disclosure relates to blended thermoplastic compositions comprising: (a) from 6 wt% to 10 wt% of a polycarbonate component; (b) from 25 wt% to 35 wt% of a polybutylene terephthalate component; (c) from greater than 1.7 wt% to 3.2 wt% of a polyester ether elastomer component; (d) from greater than 1.3 wt% to 2.4 wt% of an poly(ethylene-co-ethylacrylate) component; (e) from greater than 0.7 wt% to 1.2 wt% of an ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component; (f) from greater than 40 wt% to 60 wt% of a glass fiber component; (g) from 0.10 wt% to 0.25 wt% of a transesterification quencher; and (h) from greater than 1.0 wt% to 2.5 wt% of an epoxy hydrostabilizer agent; wherein the wt% ratio of the polycarbonate component to polybutylene terephthalate component is less than or equal to 0.5; wherein the combined weight percent value of all components does not exceed 100 wt%; and wherein all weight percent values are based on the total weight of the composition.

    [0042] In various embodiments, the disclosed blended thermoplastic compositions can optionally further comprise a transesterification agent. In various further embodiments, the disclosed blended thermoplastic compositions can optionally further comprise epoxy hydrostabilizer agent.

    [0043] In a further embodiment, the compositions of the present disclosure further comprise an additive selected from coupling agents, antioxidants, mold release agents, UV absorbers, light stabilizers, heat stabilizers, lubricants, plasticizers, pigments, dyes, colorants, anti-static agents, nucleating agents, anti-drip agents, acid scavengers, and combinations of two or more of the foregoing. In a further embodiment, compositions of the present disclosure further comprise at least one additive selected from a flame retardant, a colorant, a primary anti-oxidant, and a secondary anti-oxidant.

    [0044] In various embodiments, the blended thermoplastic compositions of the present disclosure have particular properties and characteristics. In a further embodiment, a molded sample of the blended thermoplastic composition has notched Izod impact strength greater than or equal to 140 J/m when determined in accordance with ASTM D256. In a still further embodiment, a molded sample of the blended thermoplastic composition has notched Izod impact strength greater than or equal to 150 J/m when determined in accordance with ASTM D256.

    [0045] In a further embodiment, a molded sample of the blended thermoplastic composition has a dielectric constant less than or equal to 4.0 when determined in accordance with ASTM D2520. In a still further embodiment, a molded sample of the blended thermoplastic composition has a dielectric constant less than or equal to 3.8 when determined in accordance with ASTM D2520.

    [0046] In one embodiment, the disclosed blended thermoplastic compositions comprise a polycarbonate polymer composition wherein the polycarbonate polymer comprising bisphenol A, a polycarbonate copolymer, polyester carbonate polymer, or polycarbonate-polysiloxane copolymer, or combinations thereof.

    [0047] In one embodiment, a polycarbonate can comprise any polycarbonate material or mixture of materials, for example, as recited in U.S. Patent No. 7,786,246. The term polycarbonate can be further defined as compositions have repeating structural units of the formula (1):

    in which at least 60 percent of the total number of R1 groups are aromatic organic radicals and the balance thereof are aliphatic, alicyclic, or aromatic radicals. In a further embodiment, each R1 is an aromatic organic radical and, more preferably, a radical of the formula (2):

            -A1-Y1-A2-     (2),

    wherein each of A1 and A2 is a monocyclic divalent aryl radical and Y1 is a bridging radical having one or two atoms that separate A1 from A2. In various embodiments, one atom separates A1 from A2. For example, radicals of this type include, but are not limited to, radicals such as -O-, -S-, -S(O)-, -S(O2)-, -C(O)-, methylene, cyclohexylmethylene, 2-[2.2.1]-bicycloheptylidene, ethylidene, isopropylidene, neopentylidene, cyclohexylidene, cyclopentadecylidene, cyclododecylidene, and adamantylidene. The bridging radical Y1 is preferably a hydrocarbon group or a saturated hydrocarbon group such as methylene, cyclohexylidene, or isopropylidene.

    [0048] In a further embodiment, polycarbonates can be produced by the interfacial reaction of dihydroxy compounds having the formula HO-R1-OH, which includes dihydroxy compounds of formula (3):

            HO-A1-Y1-A2-OH     (3),

    wherein Y1, A1 and A2 are as described above. Also included are bisphenol compounds of general formula (4):

    wherein Ra and Rb each represent a halogen atom or a monovalent hydrocarbon group and can be the same or different; p and q are each independently integers from 0 to 4; and Xa represents one of the groups of formula (5):

    wherein Rc and Rd each independently represent a hydrogen atom or a monovalent linear or cyclic hydrocarbon group and Re is a divalent hydrocarbon group.

    [0049] In various embodiments, a heteroatom-containing cyclic alkylidene group comprises at least one heteroatom with a valency of 2 or greater, and at least two carbon atoms. Heteroatoms for use in the heteroatom-containing cyclic alkylidene group include-O-, -S-, and -N(Z)-, where Z is a substituent group selected from hydrogen, hydroxy, C1-12 alkyl, C1-12 alkoxy, or C1-12 acyl. Where present, the cyclic alkylidene group or heteroatom-containing cyclic alkylidene group can have 3 to 20 atoms, and can be a single saturated or unsaturated ring, or fused polycyclic ring system wherein the fused rings are saturated, unsaturated, or aromatic.

    [0050] In various embodiments, examples of suitable dihydroxy compounds include the dihydroxy-substituted hydrocarbons disclosed by name or formula (generic or specific) in U.S. Pat. No. 4,217,438. A nonexclusive list of specific examples of suitable dihydroxy compounds includes the following: resorcinol, 4-bromoresorcinol, hydroquinone, 4,4'-dihydroxybiphenyl, 1,6-dihydroxynaphthalene, 2,6-dihydroxynaphthalene, bis(4-hydroxyphenyl)methane, bis(4-hydroxyphenyl)diphenylmethane, bis(4-hydroxyphenyl)-1-naphthylmethane, 1,2-bis(4-hydroxyphenyl)ethane, 1,1 -bis(4-hydroxyphenyl)-1-phenylethane, 2-(4-hydroxyphenyl)-2-(3-hydroxyphenyl)propane, bis(4-hydroxyphenyl)phenylmethane, 2,2-bis(4-hydroxy-3-bromophenyl)propane, 1,1-bis (hydroxyphenyl)cyclopentane, 1,1 -bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(4-hydroxyphenyl)isobutene, 1,1 -bis(4-hydroxyphenyl)cyclododecane, trans-2,3-bis(4-hydroxyphenyl)-2-butene, 2,2-bis(4-hydroxyphenyl)adamantine, (alpha, alpha'-bis(4-hydroxyphenyl)toluene, bis(4-hydroxyphenyl)acetonitrile, 2,2-bis(3-methyl-4-hydroxyphenyl)propane, 2,2-bis(3-ethyl-4-hydroxyphenyl)propane, 2,2-bis(3-n-propyl-4-hydroxyphenyl)propane, 2,2-bis(3-isopropyl-4-hydroxyphenyl)propane, 2,2-bis(3-sec-butyl-4-hydroxyphenyl)propane, 2,2-bis(3-t-butyl-4-hydroxyphenyl)propane, 2,2-bis(3-cyclohexyl-4-hydroxyphenyl)propane, 2,2-bis(3-allyl-4-hydroxyphenyl)propane, 2,2-bis(3-methoxy-4-hydroxyphenyl)propane, 2,2-bis(4-hydroxyphenyl)hexafluoropropane, 1,1-dichloro-2,2-bis(4-hydroxyphenyl)ethylene, 1,1-dibromo-2,2-bis(4-hydroxyphenyl)ethylene, 1,1-dichloro-2,2-bis(5-phenoxy-4-hydroxyphenyl)ethylene, 4,4'-dihydroxybenzophenone, 3,3-bis(4-hydroxyphenyl)-2-butanone, 1,6-bis(4-hydroxyphenyl)-1,6-hexanedione, ethylene glycol bis(4-hydroxyphenyl)ether, bis(4-hydroxyphenyl)ether, bis(4-hydroxyphenyl)sulfide, bis(4-hydroxyphenyl)sulfoxide, bis(4-hydroxyphenyl)sulfone, 9,9-bis(4-hydroxyphenyl)fluorine, 2,7-dihydroxypyrene, 6,6'-dihydroxy-3,3,3',3'-tetramethylspiro(bis)indane ("spirobiindane bisphenol"), 3,3-bis(4-hydroxyphenyl)phthalide, 2,6-dihydroxydibenzo-p-dioxin, 2,6-dihydroxythianthrene, 2,7-dihydroxyphenoxathin, 2,7-dihydroxy-9,10-dimethylphenazine, 3,6-dihydroxydibenzofuran, 3,6-dihydroxydibenzothiophene, 2,7-dihydroxycarbazole, 3,3-bis(4-hydroxyphenyl)phthalimidine, 2-phenyl-3,3-bis-(4-hydroxyphenyl)phthalimidine (PPPBP), and the like, as well as mixtures including at least one of the foregoing dihydroxy compounds.

    [0051] In a further embodiment, examples of the types of bisphenol compounds that can be represented by formula (3) includes 1,1-bis(4-hydroxyphenyl)methane, 1,1-bis(4-hydroxyphenyl)ethane, 2,2-bis(4-hydroxyphenyl)propane (hereinafter "bisphenol A" or "BPA"), 2,2-bis(4-hydroxyphenyl)butane, 2,2-bis(4-hydroxyphenyl)octane, 1,1-bis(4-hydroxyphenyl)propane, 1,1-bis(4-hydroxyphenyl) n-butane, 2,2-bis( 4-hydroxy-1-methylphenyl)propane, and 1,1-bis(4-hydroxy-t-butylphenyl)propane. Combinations including at least one of the foregoing dihydroxy compounds can also be used.

    [0052] In various further embodiments, bisphenols containing substituted or unsubstituted cyclohexane units can be used, for example bisphenols of formula (6):

    wherein each Rf is independently hydrogen, C1-12 alkyl, or halogen; and each Rg is independently hydrogen or C1-12 alkyl. The substituents can be aliphatic or aromatic, straight chain, cyclic, bicyclic, branched, saturated, or unsaturated. Such cyclohexane-containing bisphenols, for example the reaction product of two moles of a phenol with one mole of a hydrogenated isophorone, are useful for making polycarbonate polymers with high glass transition temperatures and high heat distortion temperatures. Cyclohexyl bisphenol containing polycarbonates, or a combination comprising at least one of the foregoing with other bisphenol polycarbonates, are supplied by Bayer Co. under the APEC™ trade name.

    [0053] In further embodiments, additional useful dihydroxy compounds are those compounds having the formula HO-R1-OH include aromatic dihydroxy compounds of formula (7):

    wherein each Rh is independently a halogen atom, a C1-10 hydrocarbyl such as a C1-10 alkyl group, a halogen substituted C1-10 hydrocarbyl such as a halogen-substituted C1-10 alkyl group, and n is 0 to 4. The halogen is usually bromine.

    [0054] In addition to the polycarbonates described above, combinations of the polycarbonate with other thermoplastic polymers, for example combinations of homopolycarbonates and/or polycarbonate copolymers, can be used.

    [0055] In various embodiments, a polycarbonate can employ two or more different dihydroxy compounds or a copolymer of a dihydroxy compounds with a glycol or with a hydroxy- or acid-terminated polyester or with a dibasic acid or hydroxy acid in the event a carbonate copolymer rather than a homopolymer is desired for use. Polyarylates and polyester-carbonate resins or their blends can also be employed. Branched polycarbonates are also useful, as well as blends of linear polycarbonate and a branched polycarbonate. The branched polycarbonates can be prepared by adding a branching agent during polymerization.

    [0056] In a further embodiment, the branching agents include polyfunctional organic compounds containing at least three functional groups selected from hydroxyl, carboxyl, carboxylic anhydride, haloformyl, and mixtures thereof. Specific examples include trimellitic acid, trimellitic anhydride, trimellitic trichloride, tris-p-hydroxy phenyl ethane, isatin-bis-phenol, tris-phenol TC (1,3,5-tris((p-hydroxyphenyl)isopropyl)benzene), tris-phenol PA (4(4(1,1-bis(p-hydroxyphenyl)-ethyl)alpha, alpha-dimethyl benzyl)phenol), 4-chloroformyl phthalic anhydride, trimesic acid, and benzophenone tetracarboxylic acid. The branching agents can be added at a level of from 0.05-2.0 weight percent. Branching agents and procedures for making branched polycarbonates are described in U.S. Pat. Nos. 3,635,895 and 4,001,184. All types of polycarbonate end groups are contemplated as being useful in the thermoplastic composition.

    [0057] In a further embodiment, the polycarbonate can be a linear homopolymer derived from bisphenol A, in which each of A1 and A2 is p-phenylene and Y1 is isopropylidene. The polycarbonates generally can have an intrinsic viscosity, as determined in chloroform at 25° C., of 0.3 to 1.5 deciliters per gram (dl/g), specifically 0.45 to 1.0 dl/g. The polycarbonates can have a weight average molecular weight (Mw) of 10,000 to 100,000 grams per mole (g/mol), as measured by gel permeation chromatography ("GPC") using a crosslinked styrene-divinyl benzene column, at a sample concentration of 1 milligram per milliliter (mg/ml), and as calibrated with polycarbonate standards. In a yet further embodiment, the polycarbonate component has an Mw of 15,000 to 55,000. In an even further embodiment, the polycarbonate component has an Mw of 18,000 to 40,000.

    [0058] In a further embodiment, a polycarbonate component used in the formulations of the present disclosure can have a melt volume flow rate (often abbreviated "MVR") measures the rate of extrusion of a thermoplastics through an orifice at a prescribed temperature and load. Polycarbonates useful for the formation of articles can have an MVR, measured at 300° C. under a load of 1.2 kg according to ASTM D1238-04 or ISO 1133, of 0.5 to 80 cubic centimeters per 10 minutes (cc/10 min). In a still further embodiment, the polycarbonate component comprises a two polycarbonate polymers wherein one of the polycarbonate polymers is a poly(aliphatic ester)-polycarbonate. In cases where the polycarbonate components comprises a non-poly(aliphatic ester)-polycarbonate and a poly(aliphatic ester)-polycarbonate, the non-poly(aliphatic ester)-polycarbonate (or a combination of such polycarbonates) can have a MVR measured at 300 degrees Celsius (°C). under a load of 1.2 kilogram (kg) according to ASTM D1238-04 or ISO 1133, of 45 to 75 cc/10 min, specifically 50 to 70 cc/10 min, and more specifically 55 to 65 cc/10 min.

    [0059] Polycarbonates, including isosorbide-based polyester-polycarbonate, can comprise copolymers comprising carbonate units and other types of polymer units, including ester units, and combinations comprising at least one of homopolycarbonates and copolycarbonates. An exemplary polycarbonate copolymer of this type is a polyester carbonate, also known as a polyester-polycarbonate or polyester carbonate. Such copolymers further contain carbonate units derived from oligomeric ester-containing dihydroxy compounds (also referred to herein as hydroxy end-capped oligomeric acrylate esters).

    [0060] In various further embodiments, "polycarbonates" and "polycarbonate resins" as used herein further include homopolycarbonates, copolymers comprising different R1 moieties in the carbonate (referred to herein as "copolycarbonates"), copolymers comprising carbonate units and other types of polymer units, such as ester units, polysiloxane units, and combinations comprising at least one of homopolycarbonates and copolycarbonates. As used herein, "combination" is inclusive of blends, mixtures, alloys, reaction products, and the like. A specific type of copolymer is a polyester carbonate, also known as a polyester-polycarbonate. Such copolymers further contain, in addition to recurring carbonate chain units of the formula (1), units of formula (8):

    wherein R2 is a divalent group derived from a dihydroxy compound, and can be, for example, a C2-10 alkylene group, a C6-20 alicyclic group, a C6-20 aromatic group or a polyoxyalkylene group in which the alkylene groups contain 2 to 6 carbon atoms, specifically 2, 3, or 4 carbon atoms; and T is a divalent group derived from a dicarboxylic acid (aliphatic, aromatic, or alkyl aromatic), and can be, for example, a C4-18 aliphatic group, a C6-20 alkylene group, a C6-20 alkylene group, a C6-20 alicyclic group, a C6-20 alkyl aromatic group, or a C6-20 aromatic group. R2 can be is a C2-30 alkylene group having a straight chain, branched chain, or cyclic (including polycyclic) structure. Alternatively, R2 can be derived from an aromatic dihydroxy compound of formula (4) above, or from an aromatic dihydroxy compound of formula (7) above.

    [0061] Examples of aromatic dicarboxylic acids that can be used to prepare the polyester units include isophthalic or terephthalic acid, 1,2-di(p-carboxyphenyl)ethane, 4,4'-dicarboxydiphenyl ether, 4,4'-bisbenzoic acid, and combinations comprising at least one of the foregoing acids. Acids containing fused rings can also be present, such as in 1,4-, 1,5-, or 2,6-naphthalenedicarboxylic acids. Examples of specific dicarboxylic acids are terephthalic acid, isophthalic acid, naphthalene dicarboxylic acid, cyclohexane dicarboxylic acid, or combinations thereof. In various embodiments, an example of a specific dicarboxylic acid comprises a combination of isophthalic acid and terephthalic acid wherein the weight ratio of isophthalic acid to terephthalic acid is 91:9 to 2:98. In another embodiment, R2 is a C2-6 alkylene group and T is p-phenylene, m-phenylene, naphthalene, a divalent cycloaliphatic group, or a combination thereof. This class of polyester includes the poly(alkylene terephthalates).

    [0062] The molar ratio of ester units to carbonate units in the copolymers can vary broadly, for example 1:99 to 99:1, specifically 10:90 to 90:10, more specifically 25:75 to 75:25, depending on the desired properties of the final composition.

    [0063] In a further embodiment, the thermoplastic composition comprises a polyester-polycarbonate copolymer, and specifically a polyester-polycarbonate copolymer in which the ester units of formula (8) comprise soft block ester units, also referred to herein as aliphatic dicarboxylic acid ester units. Such a polyester-polycarbonate copolymer comprising soft block ester units is also referred to herein as a poly(aliphatic ester)-polycarbonate. The soft block ester unit can be a C6-20 aliphatic dicarboxylic acid ester unit (where C6-20 includes the terminal carboxyl groups), and can be straight chain (i.e., unbranched) or branched chain dicarboxylic acids, cycloalkyl or cycloalkylidene-containing dicarboxylic acids units, or combinations of these structural units. In a still further embodiment, the C6-20 aliphatic dicarboxylic acid ester unit includes a straight chain alkylene group comprising methylene (-CH2-) repeating units. In a yet further embodiment, a useful soft block ester unit comprises units of formula (8a):

    wherein m is 4 to 18. In a further embodiment of formula (8a), m is 8 to 10. The poly(aliphatic ester)-polycarbonate can include less than or equal to 25 wt % of the soft block unit. In a still further embodiment, a poly(aliphatic ester)-polycarbonate comprises units of formula (8a) in an amount of 0.5 to 10 wt %, specifically 1 to 9 wt %, and more specifically 3 to 8 wt %, based on the total weight of the poly(aliphatic ester)-polycarbonate.

    [0064] The poly(aliphatic ester)-polycarbonate is a copolymer of soft block ester units and carbonate units. The poly(aliphatic ester)-polycarbonate is shown in formula (8b):

    where each R3 is independently derived from a dihydroxyaromatic compound of formula (4) or (7), m is 4 to 18, and x and y each represent average weight percentages of the poly(aliphatic ester)-polycarbonate where the average weight percentage ratio x:y is 10:90 to 0.5:99.5, specifically 9:91 to 1:99, and more specifically 8:92 to 3:97, where x+y is 100.

    [0065] Soft block ester units, as defined herein, can be derived from an alpha, omega C6-20 aliphatic dicarboxylic acid or a reactive derivative thereof. In a further embodiment, the soft block ester units can be derived from an alpha, omega C10-12 aliphatic dicarboxylic acid or a reactive derivative thereof. In a still further embodiment, the carboxylate portion of the aliphatic ester unit of formula (8a), in which the terminal carboxylate groups are connected by a chain of repeating methylene (-CH2-) units (where m is as defined for formula (8a)), is derived from the corresponding dicarboxylic acid or reactive derivative thereof, such as the acid halide (specifically, the acid chloride), an ester, or the like. Exemplary alpha, omega dicarboxylic acids (from which the corresponding acid chlorides can be derived) include alpha, omega C6 dicarboxylic acids such as hexanedioic acid (also referred to as adipic acid); alpha, omega C10 dicarboxylic acids such as decanedioic acid (also referred to as sebacic acid); and alpha, omega C12 dicarboxylic acids such as dodecanedioic acid (sometimes abbreviated as "DDDA"). It will be appreciated that the aliphatic dicarboxylic acid is not limited to these exemplary carbon chain lengths, and that other chain lengths within the C6-20 limitation can be used. In various further embodiments, the poly(aliphatic ester)-polycarbonate having soft block ester units comprising a straight chain methylene group and a bisphenol A polycarbonate group is shown in formula (8c):

    where m is 4 to 18 and x and y are as defined for formula (8b). In a specific exemplary embodiment, a useful poly(aliphatic ester)-polycarbonate copolymer comprises sebacic acid ester units and bisphenol A carbonate units (formula (8c), where m is 8, and the average weight ratio of x:y is 6:94).

    [0066] Desirably, the poly(aliphatic ester)-polycarbonate has a glass transition temperature (Tg) of 110 to 145°C., specifically 115 to 145°C., more specifically 120 to 145°C., more specifically 128 to 139°C., and still more specifically 130 to 139°C.

    [0067] In one embodiment, polycarbonates, including polyester-polycarbonates, can be manufactured by processes such as interfacial polymerization and melt polymerization.

    [0068] The polycarbonate compounds and polymers disclosed herein can, in various embodiments, be prepared by a melt polymerization process. Generally, in the melt polymerization process, polycarbonates are prepared by co-reacting, in a molten state, the dihydroxy reactant(s) (i.e., isosorbide, aliphatic diol and/or aliphatic diacid, and any additional dihydroxy compound) and a diaryl carbonate ester, such as diphenyl carbonate, or more specifically in an embodiment, an activated carbonate such as bis(methyl salicyl)carbonate, in the presence of a transesterification catalyst. The reaction can be carried out in typical polymerization equipment, such as one or more continuously stirred reactors ("CSTR"), plug flow reactors, wire wetting fall polymerizers, free fall polymerizers, wiped film polymerizers, BANBURY™ mixers, single or twin screw extruders, or combinations of the foregoing. In one embodiment, volatile monohydric phenol can be removed from the molten reactants by distillation and the polymer is isolated as a molten residue.

    [0069] The melt polymerization can include a transesterification catalyst comprising a first catalyst, also referred to herein as an alpha catalyst, comprising a metal cation and an anion. In an embodiment, the cation is an alkali or alkaline earth metal comprising Li, Na, K, Cs, Rb, Mg, Ca, Ba, Sr, or a combination comprising at least one of the foregoing. The anion is hydroxide (OH-), superoxide (O2-), thiolate (HS-), sulfide (S2-), a C1-20 alkoxide, a C6-20 aryloxide, a C1-20 carboxylate, a phosphate including biphosphate, a C1-20 phosphonate, a sulfate including bisulfate, sulfites including bisulfites and metabisulfites, a C1-20 sulfonate, a carbonate including bicarbonate, or a combination comprising at least one of the foregoing. In another embodiment, salts of an organic acid comprising both alkaline earth metal ions and alkali metal ions can also be used. Salts of organic acids useful as catalysts are illustrated by alkali metal and alkaline earth metal salts of formic acid, acetic acid, stearic acid and ethyelenediaminetetraacetic acid. The catalyst can also comprise the salt of a non-volatile inorganic acid. By "nonvolatile", it is meant that the referenced compounds have no appreciable vapor pressure at ambient temperature and pressure. In particular, these compounds are not volatile at temperatures at which melt polymerizations of polycarbonate are typically conducted. The salts of nonvolatile acids are alkali metal salts of phosphites; alkaline earth metal salts of phosphites; alkali metal salts of phosphates; and alkaline earth metal salts of phosphates. Exemplary transesterification catalysts include, lithium hydroxide, sodium hydroxide, potassium hydroxide, cesium hydroxide, magnesium hydroxide, calcium hydroxide, barium hydroxide, lithium formate, sodium formate, potassium formate, cesium formate, lithium acetate, sodium acetate, potassium acetate, lithium carbonate, sodium carbonate, potassium carbonate, lithium methoxide, sodium methoxide, potassium methoxide, lithium ethoxide, sodium ethoxide, potassium ethoxide, lithium phenoxide, sodium phenoxide, potassium phenoxide, sodium sulfate, potassium sulfate, NaH2PO3, NaH2PO4, Na2H2PO3, KH2PO4, CSH2PO4, CS2H2PO4, Na2SO3, Na2S2O5, sodium mesylate, potassium mesylate, sodium tosylate, potassium tosylate, magnesium disodium ethylenediamine tetraacetate (EDTA magnesium disodium salt), or a combination comprising at least one of the foregoing. It will be understood that the foregoing list is exemplary and should not be considered as limited thereto. In one embodiment, the transesterification catalyst is an alpha catalyst comprising an alkali or alkaline earth salt. In an exemplary embodiment, the transesterification catalyst comprising sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium methoxide, potassium methoxide, NaH2PO4, or a combination comprising at least one of the foregoing.

    [0070] The amount of alpha catalyst can vary widely according to the conditions of the melt polymerization, and can be 0.001 to 500 micromole (µmol). In an embodiment, the amount of alpha catalyst can be 0.01 to 20 µmol, specifically 0.1 to 10 µmol, more specifically 0.5 to 9 µmol, and still more specifically 1 to 7 µmol, per mole of aliphatic diol and any other dihydroxy compound present in the melt polymerization.

    [0071] In another embodiment, a second transesterification catalyst, also referred to herein as a beta catalyst, can optionally be included in the melt polymerization process, provided that the inclusion of such a second transesterification catalyst does not significantly adversely affect the desirable properties of the polycarbonate. Exemplary transesterification catalysts can further include a combination of a phase transfer catalyst of formula (R3)4Q+X above, wherein each R3 is the same or different, and is a C1-10 alkyl group; Q is a nitrogen or phosphorus atom; and X is a halogen atom or a C1-8 alkoxy group or C6-18 aryloxy group. Exemplary phase transfer catalyst salts include, for example, [CH3(CH2)3]4NX, [CH3(CH2)3]4PX, [CH3(CH2)5]4NX, [CH3(CH2)6]4NX, [CH3(CH2)4]4NX, CH3[CH3(CH2)3]3NX, and CH3[CH3(CH2)2]3NX, wherein X is Cl-, Br-, a C1-8 alkoxy group or a C6-18 aryloxy group. Examples of such transesterification catalysts include tetrabutylammonium hydroxide, methyltributylammonium hydroxide, tetrabutylammonium acetate, tetrabutylphosphonium hydroxide, tetrabutylphosphonium acetate, tetrabutylphosphonium phenolate, or a combination comprising at least one of the foregoing. Other melt transesterification catalysts include alkaline earth metal salts or alkali metal salts. In various embodiments, where a beta catalyst is desired, the beta catalyst can be present in a molar ratio, relative to the alpha catalyst, of less than or equal to 10, specifically less than or equal to 5, more specifically less than or equal to 1, and still more specifically less than or equal to 0.5. In other embodiments, the melt polymerization reaction disclosed herein uses only an alpha catalyst as described hereinabove, and is substantially free of any beta catalyst. As defined herein, "substantially free of' can mean where the beta catalyst has been excluded from the melt polymerization reaction. In one embodiment, the beta catalyst is present in an amount of less than 10 parts per million (ppm), specifically less than 1 ppm, more specifically less than 0.1 ppm, more specifically less than or equal to 0.01 ppm, and more specifically less than or equal to 0.001 ppm, based on the total weight of all components used in the melt polymerization reaction.

    [0072] In one embodiment, an end-capping agent (also referred to as a chain-stopper) can optionally be used to limit molecular weight growth rate, and so control molecular weight in the polycarbonate. Exemplary chain-stoppers include certain monophenolic compounds (i.e., phenyl compounds having a single free hydroxy group), monocarboxylic acid chlorides, and/or monochloroformates. Phenolic chain-stoppers are exemplified by phenol and C1-C22 alkyl-substituted phenols such as p-cumyl-phenol, resorcinol monobenzoate, and p- and tertiary-butyl phenol, cresol, and monoethers of diphenols, such as p-methoxyphenol. Alkyl-substituted phenols with branched chain alkyl substituents having 8 to 9 carbon atoms can be specifically mentioned.

    [0073] In another embodiment, endgroups can be derived from the carbonyl source (i.e., the diaryl carbonate), from selection of monomer ratios, incomplete polymerization, chain scission, and the like, as well as any added end-capping groups, and can include derivatizable functional groups such as hydroxy groups, carboxylic acid groups, or the like. In one embodiment, the endgroup of a polycarbonate, including a polycarbonate polymer as defined herein, can comprise a structural unit derived from a diaryl carbonate, where the structural unit can be an endgroup. In a further embodiment, the endgroup is derived from an activated carbonate. Such endgroups can be derived from the transesterification reaction of the alkyl ester of an appropriately substituted activated carbonate, with a hydroxy group at the end of a polycarbonate polymer chain, under conditions in which the hydroxy group reacts with the ester carbonyl from the activated carbonate, instead of with the carbonate carbonyl of the activated carbonate. In this way, structural units derived from ester containing compounds or substructures derived from the activated carbonate and present in the melt polymerization reaction can form ester endgroups.

    [0074] In one embodiment, the melt polymerization reaction can be conducted by subjecting the reaction mixture to a series of temperature-pressure-time protocols. In some embodiments, this involves gradually raising the reaction temperature in stages while gradually lowering the pressure in stages. In one embodiment, the pressure is reduced from atmospheric pressure at the start of the reaction to 1 millibar (100 pascals (Pa)) or lower, or in another embodiment to 0.1 millibar (10 Pa) or lower in several steps as the reaction approaches completion. The temperature can be varied in a stepwise fashion beginning at a temperature of the melting temperature of the reaction mixture and subsequently increased to final temperature. In one embodiment, the reaction mixture is heated from room temperature to 150°C. In such an embodiment, the polymerization reaction starts at a temperature of 150 °C to 220°C. In another embodiment, the polymerization temperature can be up to 220°C. In other embodiments, the polymerization reaction can then be increased to 250°C and then optionally further increased to a temperature of 320°C, and all subranges there between. In one embodiment, the total reaction time can be from 30 minutes to 200 minutes and all subranges there between. This procedure will generally ensure that the reactants react to give polycarbonates with the desired molecular weight, glass transition temperature and physical properties. The reaction proceeds to build the polycarbonate chain with production of ester-substituted alcohol by-product such as methyl salicylate. In one embodiment, efficient removal of the by-product can be achieved by different techniques such as reducing the pressure. Generally the pressure starts relatively high in the beginning of the reaction and is lowered progressively throughout the reaction and temperature is raised throughout the reaction.

    [0075] In one embodiment, the progress of the reaction can be monitored by measuring the melt viscosity or the weight average molecular weight of the reaction mixture using techniques known in the art such as gel permeation chromatography. These properties can be measured by taking discrete samples or can be measured on-line. After the desired melt viscosity and/or molecular weight is reached, the final polycarbonate product can be isolated from the reactor in a solid or molten form. It will be appreciated by a person skilled in the art, that the method of making aliphatic homopolycarbonate and aliphatic-aromatic copolycarbonates as described in the preceding sections can be made in a batch or a continuous process and the process disclosed herein is preferably carried out in a solvent free mode. Reactors chosen should ideally be self-cleaning and should minimize any "hot spots." However, vented extruders similar to those that are commercially available can be used.

    [0076] Polycarbonates, including polyester-polycarbonates, can be also be manufactured by interfacial polymerization. Although the reaction conditions for interfacial polymerization can vary, an exemplary process generally involves dissolving or dispersing a dihydric phenol reactant in aqueous caustic soda or potash, adding the resulting mixture to a suitable water-immiscible solvent medium, and contacting the reactants with a carbonate precursor in the presence of a catalyst such as triethylamine or a phase transfer catalyst, under controlled pH conditions, e.g., pH 8 to pH 10. The most commonly used water immiscible solvents include methylene chloride, 1,2-dichloroethane, chlorobenzene, toluene, and the like.

    [0077] Carbonate precursors include, for example, a carbonyl halide such as carbonyl bromide or carbonyl chloride, or a haloformate such as a bishaloformates of a dihydric phenol (e.g., the bischloroformates of bisphenol A, hydroquinone, or the like) or a glycol (e.g., the bishaloformate of ethylene glycol, neopentyl glycol, polyethylene glycol, or the like). Combinations comprising at least one of the foregoing types of carbonate precursors can also be used. In an exemplary embodiment, an interfacial polymerization reaction to form carbonate linkages uses phosgene as a carbonate precursor, and is referred to as a phosgenation reaction.

    [0078] Among the phase transfer catalysts that can be used are catalysts of the formula (R3)4Q+X, wherein each R3 is the same or different, and is a C1-10 alkyl group; Q is a nitrogen or phosphorus atom; and X is a halogen atom or a C1-8 alkoxy group or C6-18 aryloxy group. Useful phase transfer catalysts include, for example, [CH3(CH2)3]4NX, [CH3(CH2)3]4PX, [CH3(CH2)5]4NX, [CH3(CH2)6]4NX, [CH3(CH2)4]4NX, CH3[CH3(CH2)3]3NX, and CH3[CH3(CH2)2]3NX, wherein X is Cl-, Br- , a C1-8 alkoxy group or a C6-18 aryloxy group. An effective amount of a phase transfer catalyst can be 0.1 to 10 wt % based on the weight of bisphenol in the phosgenation mixture. In another embodiment, an effective amount of phase transfer catalyst can be 0.5 to 2 wt % based on the weight of bisphenol in the phosgenation mixture.

    [0079] All types of polycarbonate end groups are contemplated as being useful in the polycarbonate composition, provided that such end groups do not significantly adversely affect desired properties of the compositions.

    [0080] Branched polycarbonate blocks can be prepared by adding a branching agent during polymerization. These branching agents include polyfunctional organic compounds containing at least three functional groups selected from hydroxyl, carboxyl, carboxylic anhydride, haloformyl, and mixtures of the foregoing functional groups. Specific examples include trimellitic acid, trimellitic anhydride, trimellitic trichloride, tris-p-hydroxy phenyl ethane, isatin-bis-phenol, tris-phenol TC (1,3,5-tris((p-hydroxyphenyl)isopropyl)benzene), tris-phenol PA (4(4(1,1-bis(p-hydroxyphenyl)-ethyl)alpha, alpha-dimethyl benzyl)phenol), 4-chloroformyl phthalic anhydride, trimesic acid, and benzophenone tetracarboxylic acid. The branching agents can be added at a level of 0.05 to 2.0 wt %. Mixtures comprising linear polycarbonates and branched polycarbonates can be used.

    [0081] A chain stopper (also referred to as a capping agent) can be included during polymerization. The chain stopper limits molecular weight growth rate, and so controls molecular weight in the polycarbonate. Exemplary chain stoppers include certain mono-phenolic compounds, monocarboxylic acid chlorides, and/or monochloroformates. Mono-phenolic chain stoppers are exemplified by monocyclic phenols such as phenol and C1-C22 alkyl-substituted phenols such as p-cumyl-phenol, resorcinol monobenzoate, and p- and tertiary-butyl phenol; and monoethers of diphenols, such as p-methoxyphenol. Alkyl-substituted phenols with branched chain alkyl substituents having 8 to 9 carbon atom can be specifically mentioned. Certain mono-phenolic UV absorbers can also be used as a capping agent, for example 4-substituted-2-hydroxybenzophenones and their derivatives, aryl salicylates, monoesters of diphenols such as resorcinol monobenzoate, 2-(2-hydroxyaryl)-benzotriazoles and their derivatives, 2-(2-hydroxyaryl)-1,3,5-triazines and their derivatives, and the like.

    [0082] Mono-carboxylic acid chlorides can also be used as chain stoppers. These include monocyclic, mono-carboxylic acid chlorides such as benzoyl chloride, C1-C22 alkyl-substituted benzoyl chloride, toluoyl chloride, halogen-substituted benzoyl chloride, bromobenzoyl chloride, cinnamoyl chloride, 4-nadimidobenzoyl chloride, and combinations thereof; polycyclic, mono-carboxylic acid chlorides such as trimellitic anhydride chloride, and naphthoyl chloride; and combinations of monocyclic and polycyclic mono-carboxylic acid chlorides. Chlorides of aliphatic monocarboxylic acids with less than or equal to 22 carbon atoms are useful. Functionalized chlorides of aliphatic monocarboxylic acids, such as acryloyl chloride and methacryoyl chloride, are also useful. Also useful are mono-chloroformates including monocyclic, mono-chloroformates, such as phenyl chloroformate, alkyl-substituted phenyl chloroformate, p-cumyl phenyl chloroformate, toluene chloroformate, and combinations thereof.

    [0083] Specifically, polyester-polycarbonates, including poly(aliphatic ester)-polycarbonates, can be prepared by interfacial polymerization. Rather than utilizing the dicarboxylic acid (such as the alpha, omega C6-20 aliphatic dicarboxylic acid) per se, it is possible, and sometimes even preferred, to employ the reactive derivatives of the dicarboxylic acid, such as the corresponding dicarboxylic acid halides, and in particular the acid dichlorides and the acid dibromides. Thus, for example instead of using isophthalic acid, terephthalic acid, or a combination comprising at least one of the foregoing (for poly(arylate ester)-polycarbonates), it is possible to employ isophthaloyl dichloride, terephthaloyl dichloride, and a combination comprising at least one of the foregoing. Similarly, for the poly(aliphatic ester)-polycarbonates, it is possible, and even desirable, to use for example acid chloride derivatives such as a C6 dicarboxylic acid chloride (adipoyl chloride), a C10 dicarboxylic acid chloride (sebacoyl chloride), or a C12 dicarboxylic acid chloride (dodecanedioyl chloride). The dicarboxylic acid or reactive derivative can be condensed with the dihydroxyaromatic compound in a first condensation, followed by in situ phosgenation to generate the carbonate linkages with the dihydroxyaromatic compound. Alternatively, the dicarboxylic acid or derivative can be condensed with the dihydroxyaromatic compound simultaneously with phosgenation.

    [0084] In an embodiment, where the melt volume rate of an otherwise compositionally suitable poly(aliphatic ester)-polycarbonate is not suitably high, i.e., where the MVR is less than 13 cc/10 min when measured at 250°C., under a load of 1.2 kg, the poly(aliphatic ester)-polycarbonate can be modified to provide a reaction product with a higher flow (i.e., greater than or equal to 13 cc/10 min when measured at 250°C., under a load of 1.2 kg), by treatment using a redistribution catalyst under conditions of reactive extrusion. During reactive extrusion, the redistribution catalyst is typically included in small amounts of less than or equal to 400 ppm by weight, by injecting a dilute aqueous solution of the redistribution catalyst into the extruder being fed with the poly(aliphatic ester)-polycarbonate.

    [0085] In a further embodiment, the redistribution-catalyst is a tetraalkylphosphonium hydroxide, tetraalkylphosphonium alkoxide, tetraalkylphosphonium aryloxide, a tetraalkylphosphonium carbonate, a tetraalkylammonium hydroxide, a tetraalkylammonium carbonate, a tetraalkylammonium phosphite, a tetraalkylammonium acetate, or a combination comprising at least one of the foregoing catalysts, wherein each alkyl is independently a C1-6 alkyl. In a specific embodiment, a useful redistribution catalyst is a tetra C1-6 alkylphosphonium hydroxide, C1-6 alkyl phosphonium phenoxide, or a combination comprising one or more of the foregoing catalysts. An exemplary redistribution catalyst is tetra-n-butylphosphonium hydroxide.

    [0086] In a further embodiment, the redistribution catalyst is present in an amount of 40 to 120 ppm, specifically 40 to 110 ppm, and more specifically 40 to 100 ppm, by weight based on the weight of the poly(aliphatic ester)-polycarbonate.

    [0087] Copolymers comprising alkylene terephthalate repeating ester units with other ester groups can also be useful. Useful ester units can include different alkylene terephthalate units, which can be present in the polymer chain as individual units, or as blocks of poly(alkylene terephthalates). Specific examples of such copolymers include poly(cyclohexanedimethylene terephthalate)-co-poly(ethylene terephthalate), abbreviated as "PETG" where the polymer comprises greater than or equal to 50 mole percent (mol %) of poly(ethylene terephthalate), and abbreviated as "PCTG" where the polymer comprises greater than 50 mol % of poly(1,4-cyclohexanedimethylene terephthalate).

    [0088] Poly(cycloalkylene diester)s can also include poly(alkylene cyclohexanedicarboxylate)s. Of these, a specific example is poly(1,4-cyclohexanedimethanol-1,4-cyclohexanedicarboxylate) ("PCCD"), having recurring units of formula (9):

    wherein, as described using formula (8), R2 is a 1,4-cyclohexanedimethylene group derived from 1,4-cyclohexanedimethanol, and T is a cyclohexane ring derived from cyclohexanedicarboxylate or a chemical equivalent thereof, and can comprise the cis-isomer, the trans-isomer, or a combination comprising at least one of the foregoing isomers.

    [0089] The polyesters can be obtained by interfacial polymerization or melt-process condensation as described above, by solution phase condensation, or by transesterification polymerization wherein, for example, a dialkyl ester such as dimethyl terephthalate can be transesterified with ethylene glycol using acid catalysis, to generate poly(ethylene terephthalate). It is possible to use a branched polyester in which a branching agent, for example, a glycol having three or more hydroxyl groups or a trifunctional or multifunctional carboxylic acid has been incorporated. Furthermore, it is sometime desirable to have various concentrations of acid and hydroxyl end groups on the polyester, depending on the ultimate end use of the composition.

    [0090] Polyester-polycarbonate copolymers generally can have a weight average molecular weight (Mw) of 1,500 to 100,000 g/mol, specifically 1,700 to 50,000 g/mol. In an embodiment, poly(aliphatic ester)-polycarbonates have a molecular weight of 15,000 to 45,000 g/mol, specifically 17,000 to 40,000 g/mol, more specifically 20,000 to 30,000 g/mol, and still more specifically 20,000 to 25,000 g/mol. Molecular weight determinations are performed using gel permeation chromatography (GPC), using a crosslinked styrenedivinylbenzene column and calibrated to polycarbonate references. Samples are prepared at a concentration of 1 mg/ml, and are eluted at a flow rate of 1.0 milliliter per minute (ml/min).

    [0091] A polyester-polycarbonate can in general have an MVR of 5 to 150 cc/10 min., specifically 7 to 125 cc/10 min, more specifically 9 to 110 cc/10 min, and still more specifically 10 to 100 cc/10 min., measured at 300° C. and a load of 1.2 kilograms according to ASTM D1238-04 or ISO 1133. Commercial polyester-polycarbonates are marketed under the trade name LEXAN™ SLX polymers, including for example LEXAN™ SLX-9000, and are available from SABIC Innovative Plastics (formerly GE Plastics).

    [0092] In an embodiment, poly(aliphatic ester)-polycarbonates have an MVR of 13 to 25 cc/10 min, and more specifically 15 to 22 cc/10 min, measured at 250°C. and under a load of 1.2 kilograms and a dwell time of 6 minutes, according to ASTM D1238-04. Also in an embodiment, poly(aliphatic ester)-polycarbonates have an MVR of 13 to 25 cc/10 min, and more specifically 15 to 22 cc/10 min, measured at 250°C. and under a load of 1.2 kilograms and a dwell time of 4 minutes, according to ISO 1133.

    [0093] In an embodiment, the thermoplastic composition comprises poly(aliphatic ester)-polycarbonate in an amount of 50 to 100 wt%, based on the total weight of poly(aliphatic ester)-polycarbonate and any added polycarbonate. In a specific embodiment, the thermoplastic composition comprises only poly(aliphatic ester)-polycarbonate. In another specific embodiment, the thermoplastic comprises poly(aliphatic ester)-polycarbonate that has been reactively extruded to form a reaction product. In another specific embodiment, the thermoplastic comprises a blend of poly(aliphatic ester)-polycarbonate that has been reactively extruded.

    [0094] In a further embodiment, the polycarbonate polymer is a homopolymer. In a still further embodiment, the homopolymer comprises repeating units derived from bisphenol A.

    [0095] In a further embodiment, the polycarbonate component is a copolymer. In a still further embodiment, the copolymer comprises repeating units derived from BPA. In yet a further embodiment, the copolymer comprises repeating units derived from sebacic acid. In an even further embodiment, the copolymer comprises repeating units derived from sebacic acid and BPA. Useful polycarbonate copolymers are commercially available and include, but are not limited to, those marketed under the trade names LEXAN™ EXL and LEXAN™ HFD polymers, and are available from SABIC Innovative Plastics (formerly GE Plastics).

    [0096] In various embodiments, the blended thermoplastic compositions of the present disclosure comprise a polycarbonate component present in an amount from 5 wt% to 25 wt%. In a further embodiment, the polycarbonate component is present in an amount from 6 wt% to 20 wt%. In a still further embodiment, the polycarbonate component is present in an amount from 6 wt% to 17 wt%. In a yet further embodiment, the polycarbonate component is present in an amount from 6 wt% to 13 wt%. In an even further embodiment, the polycarbonate component is present in an amount from 6 wt% to 10 wt%.

    [0097] In a further embodiment, the polycarbonate component has a weight average molecular weight from 15,000 to 50,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards. In a still further embodiment, the polycarbonate component has a weight average molecular weight from 15,000 to 40,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards. In a yet further embodiment, the polycarbonate component has a weight average molecular weight from 15,000 to 30,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards. In an even further embodiment, the polycarbonate component has a weight average molecular weight from 15,000 to 25,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards. In a still further embodiment, the polycarbonate component has a weight average molecular weight from 15,000 to 23,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards.

    [0098] In a further embodiment, the polycarbonate component has a weight average molecular weight from 18,000 to 50,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards. In a still further embodiment, the polycarbonate component has a weight average molecular weight from 18,000 to 40,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards. In a yet further embodiment, the polycarbonate component has a weight average molecular weight from 18,000 to 30,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards. In an even further embodiment, the polycarbonate component has a weight average molecular weight from 18,000 to 25,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards. In a still further embodiment, the polycarbonate component has a weight average molecular weight from 18,000 to 23,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards.

    [0099] In various embodiments, the polycarbonate component has a melt volume flow rate (MVR) from 17 grams/10 minutes to 32 grams/10 minutes when measured at 300°C and under a load of 1.2 kg according to ASTM D1238. In a still further embodiment, the polycarbonate component has a melt volume flow rate (MVR) from 20 grams/10 minutes to 30 grams/10 minutes when measured at 300°C and under a load of 1.2 kg according to ASTM D1238. In a yet further embodiment, the polycarbonate component has a melt volume flow rate (MVR) from 22 grams/10 minutes to 29 grams/10 minutes when measured at 300°C and under a load of 1.2 kg according to ASTM D1238.

    [0100] In a further embodiment, the polycarbonate component comprises a first polycarbonate component and a second polycarbonate component.

    [0101] In a further embodiment, the first polycarbonate component is a high flow polycarbonate. In a still further embodiment, the first polycarbonate component has a melt volume flow rate (MVR) from 17 grams/10 minutes to 50 grams/10 minutes when measured at 300 °C and under a load of 1.2 kg according to ASTM D1238. In yet a further embodiment, the first polycarbonate component has a melt volume flow rate (MVR) from 20 grams/10 minutes (g/10 min) to 45 grams/10 minutes when measured at 300°C and under a load of 1.2 kg according to ASTM D1238. In an even further embodiment, the first polycarbonate component has a melt volume flow rate (MVR) from 22 grams/10 minutes to 40 grams/10 minutes when measured at 300°C and under a load of 1.2 kg according to ASTM D1238.

    [0102] In a further embodiment, the first polycarbonate component has a weight average molecular weight from 18,000 to 40,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards. In a still further embodiment, the first polycarbonate component has a weight average molecular weight from 18,000 to 30,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards. In yet a further embodiment, the first polycarbonate component has a weight average molecular weight from 18,000 to 25,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards. In an even further embodiment, the first polycarbonate component has a weight average molecular weight from 18,000 to 25,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards.

    [0103] In a further embodiment, the second polycarbonate component is a low flow polycarbonate. In a still further embodiment, the second polycarbonate component has a melt volume flow rate (MVR) from 1.0 gram/10 minutes to 8.0 grams/10 minutes when measured at 300°C and under a load of 1.2 kg according to ASTM D1238. In yet a further embodiment, the second polycarbonate component has a melt volume flow rate (MVR) from 1 gram/10 minutes to 7.2 grams/10 minutes when measured at 300°C and under a load of 1.2 kg according to ASTM D1238. In an even further embodiment, the second polycarbonate component has a melt volume flow rate (MVR) from 1 gram/10 minutes to 7.1 grams/10 minutes when measured at 300°C and under a load of 1.2 kg according to ASTM D1238.

    [0104] In a further embodiment, the second polycarbonate component has a weight average molecular weight from 18,000 to 40,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards. In a still further embodiment, the second polycarbonate component has a weight average molecular weight from 20,000 to 35,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards. In yet a further embodiment, the second polycarbonate component has a weight average molecular weight from 20,000 to 30,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards. In an even further embodiment, the second polycarbonate component has a weight average molecular weight from 23,000 to 30,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards. In a still further embodiment, the second polycarbonate component has a weight average molecular weight from 25,000 to 30,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards. In yet a further embodiment, the second polycarbonate component has a weight average molecular weight from 27,000 to 30,000 grams/mole, as measured by gel permeation chromatography using BPA polycarbonate standards.

    [0105] In one embodiment, the disclosed blended thermoplastic compositions comprise a polybutylene terephthalate component. As used herein, polybutylene terephthalate can be used interchangeably with poly(1,4-butylene terephthalate). Polybutylene terephthalate is one type of polyester. Polyesters, which include poly(alkylene dicarboxylates), liquid crystalline polyesters, and polyester copolymers, can be useful in the disclosed thermoplastic compositions of the present disclosure. In general, polyesters, as described herein, including polybutylene terephthalate, are highly miscible with the polycarbonates when blended.

    [0106] Polyesters having repeating units of formula (A):

    wherein T is a residue derived from a terephthalic acid or chemical equivalent thereof, and D is a residue derived from polymerization of an ethylene glycol, butylene diol, specifically 1,4-butane diol, or chemical equivalent thereof. Chemical equivalents of diacids include dialkyl esters, e.g., dimethyl esters, diaryl esters, anhydrides, salts, acid chlorides, acid bromides, and the like. Chemical equivalents of ethylene diol and butylene diol include esters, such as dialkylesters, diaryl esters, and the like.

    [0107] In addition to units derived from a terephthalic acid or chemical equivalent thereof, and ethylene glycol or a butylene diol, specifically 1,4-butane diol, or chemical equivalent thereof, other T and/or D units can be present in the polyester, provided that the type or amount of such units do not significantly adversely affect the desired properties of the thermoplastic compositions.

    [0108] In addition to units derived from a terephthalic acid or chemical equivalent thereof, and ethylene glycol or a butylene diol, specifically 1,4-butane diol, or chemical equivalent thereof, other T and/or D units can be present in the polyester, provided that the type or amount of such units do not significantly adversely affect the desired properties of the thermoplastic compositions.

    [0109] Examples of aromatic dicarboxylic acids include 1,4-naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, and combinations comprising at least one of the foregoing dicarboxylic acids. Exemplary cycloaliphatic dicarboxylic acids include norbornene dicarboxylic acids, 1,4-cyclohexanedicarboxylic acids, and the like. In a specific embodiment, T is derived from a combination of terephthalic acid and isophthalic acid wherein the weight ratio of terephthalic acid to isophthalic acid is 99:1 to 10:90, specifically 55:1 to 50:50.

    [0110] Examples of C6-C12 aromatic diols include, but are not limited to, resorcinol, hydroquinone, and pyrocatechol, as well as diols such as 1,5-naphthalene diol, 2,6-naphthalene diol, 1,4-naphthalene diol, 4,4'-dihydroxybiphenyl, bis(4-hydroxyphenyl)ether, bis(4-hydroxyphenyl)sulfone, and the like, and combinations comprising at least one of the foregoing aromatic diols.

    [0111] Exemplary C2-C12 aliphatic diols include, but are not limited to, straight chain, branched, or cycloaliphatic alkane diols such as propylene glycol, i.e., 1,2- and 1,3-propylene glycol, 2,2-dimethyl-1,3-propane diol, 2-ethyl-2-methyl-1,3-propane diol, 1,4-but-2-ene diol, 1,3- and 1,5-pentane diol, dipropylene glycol, 2-methyl-1,5-pentane diol, 1,6-hexane diol, dimethanol decalin, dimethanol bicyclooctane, 1,4-cyclohexane dimethanol, including its cis- and trans-isomers, triethylene glycol, 1,10-decanediol; and combinations comprising at least of the foregoing diols.

    [0112] Polyesters can also include aromatic polyesters, poly(alkylene esters) including poly(alkylene arylates), and poly(cycloalkylene diesters). Aromatic polyesters can have a polyester structure according to formula (A), wherein D and T are each aromatic groups as described hereinabove. In an embodiment, useful aromatic polyesters can include, for example, poly(isophthalate-terephthalate-resorcinol)esters, poly(isophthalate-terephthalate-bisphenol A)esters, poly[(isophthalate-terephthalate-resorcinol)ester-co-(isophthalate-terephthalate-bisphenol A)]ester, or a combination comprising at least one of these. Also contemplated are aromatic polyesters with a minor amount, e.g., 0.5 to 10 wt %, based on the total weight of the polyester, of units derived from an aliphatic diacid and/or an aliphatic polyol to make copolyesters. Poly(alkylene arylates) can have a polyester structure according to formula (A), wherein T comprises groups derived from aromatic dicarboxylates, cycloaliphatic dicarboxylic acids, or derivatives thereof.

    [0113] Examples of specifically useful T groups include 1,2-, 1,3-, and 1,4-phenylene; 1,4- and 1,5-naphthylenes; cis- or trans-1,4-cyclohexylene; and the like. Specifically, where T is 1,4-phenylene, the poly(alkylene arylate) is a poly(alkylene terephthalate). In addition, for poly(alkylene arylate), specifically useful alkylene groups D include, for example, ethylene, 1,4-butylene, and bis-(alkylene-disubstituted cyclohexane) including cis- and/or trans-1,4-(cyclohexylene)dimethylene.

    [0114] Examples of poly(alkylene terephthalates) include poly(ethylene terephthalate) ("PET"), poly(1,4-butylene terephthalate) (PBT), and poly(propylene terephthalate) ("PPT"). Also useful are poly(alkylene naphthoates), such as poly(ethylene naphthanoate) ("PEN"), and poly(butylene naphthanoate) ("PBN"). A useful poly(cycloalkylene diester) is poly(cyclohexanedimethylene terephthalate) ("PCT"). Combinations comprising at least one of the foregoing polyesters can also be used.

    [0115] Copolymers comprising alkylene terephthalate repeating ester units with other ester groups can also be useful. Useful ester units can include different alkylene terephthalate units, which can be present in the polymer chain as individual units, or as blocks of poly(alkylene terephthalates). Specific examples of such copolymers include poly(cyclohexanedimethylene terephthalate)-co-poly(ethylene terephthalate), abbreviated as PETG where the polymer comprises greater than or equal to 50 mol % of poly(ethylene terephthalate), and abbreviated as PCTG where the polymer comprises greater than 50 mol % of poly(1,4-cyclohexanedimethylene terephthalate).

    [0116] Poly(cycloalkylene diester)s can also include poly(alkylene cyclohexanedicarboxylate)s. Of these, a specific example is poly(1,4-cyclohexanedimethanol-1,4-cyclohexanedicarboxylate) (PCCD), having recurring units of formula (B):

    wherein, as described using formula (A), R2 is a 1,4-cyclohexanedimethylene group derived from 1,4-cyclohexanedimethanol, and T is a cyclohexane ring derived from cyclohexanedicarboxylate or a chemical equivalent thereof, and can comprise the cis-isomer, the trans-isomer, or a combination comprising at least one of the foregoing isomers.

    [0117] Polyesters, including the polybutylene terephthalate component, can be obtained by interfacial polymerization or melt-process condensation as described above, by solution phase condensation, or by transesterification polymerization wherein, for example, a dialkyl ester such as dimethyl terephthalate can be transesterified with ethylene glycol using acid catalysis, to generate poly(ethylene terephthalate). The condensation reaction may be facilitated by the use of a catalyst, with the choice of catalyst being determined by the nature of the reactants. The various catalysts for use herein are very well known in the art and are too numerous to mention individually herein. Generally, however, when an alkyl ester of the dicarboxylic acid compound is employed, an ester interchange type of catalyst is preferred, such as Ti(OC4H9)6in n-butanol.

    [0118] It is possible to use a branched polyester in which a branching agent, for example, a glycol having three or more hydroxyl groups or a trifunctional or multifunctional carboxylic acid has been incorporated. Furthermore, it is sometime desirable to have various concentrations of acid and hydroxyl end groups on the polyester, depending on the ultimate end use of the composition.

    [0119] In various embodiments, the polybutylene terephthalate component has an intrinsic viscosity (as measured in phenol/tetrachloroethane (60:40, volume/volume ratio) at 25°C.) ranging from at least 0.4 to 2.0 deciliters per gram (dl/g). In a further embodiment, the polybutylene terephthalate component has an intrinsic viscosity (as measured in chloroform at 25°C.) ranging from at least 0.45 to 1.2 deciliters per gram.

    [0120] In a further embodiment, the polybutylene terephthalate component has a weight average molecular weight from 5,000 to 130,000 g/mol as determined by gel permeation chromatography in chloroform/hexafluoroisopropanol (5:95, volume/volume ratio) at 25°C using polystyrene standards. In a still further embodiment, the polybutylene terephthalate component has a weight average molecular weight from 10,000 to 200,000 g/mol as determined by gel permeation chromatography in chloroform/hexafluoroisopropanol (5:95, volume/volume ratio) at 25°C using polystyrene standards. In a yet further embodiment, the polybutylene terephthalate component has a weight average molecular weight from 30,000 to 200,000 g/mol as determined by gel permeation chromatography in chloroform/hexafluoroisopropanol (5:95, volume/volume ratio) at 25°C using polystyrene standards. In an even further embodiment, the polybutylene terephthalate component has a weight average molecular weight from 50,000 to 200,000 g/mol as determined by gel permeation chromatography in chloroform/hexafluoroisopropanol (5:95, volume/volume ratio) at 25°C using polystyrene standards. In a still further embodiment, the polybutylene terephthalate component has a weight average molecular weight from 60,000 to 200,000 g/mol as determined by gel permeation chromatography in chloroform/hexafluoroisopropanol (5:95, volume/volume ratio) at 25°C using polystyrene standards.

    [0121] A mixture of polyester resins with differing viscosities can be used to make a blend of two or more polybutylene terephthalates to allow for control of viscosity of the final blended thermoplastic composition.

    [0122] In a further embodiment, the polybutylene terephthalate component is present in an amount from 20 wt% to 50 wt%. In a still further embodiment, the polybutylene terephthalate component is present in an amount from 25 wt% to 50 wt%. In a yet further embodiment, the polybutylene terephthalate component is present in an amount from 28 wt% to 48 wt%. In an even further embodiment, the polybutylene terephthalate component is present in an amount from 28 wt% to 42 wt%. In a still further embodiment, the polybutylene terephthalate component is present in an amount from 28 wt% to 35 wt%.

    [0123] In a further embodiment, the polybutylene terephthalate component has an intrinsic viscosity from 0.50 to 0.80.

    [0124] In an embodiment, a compatibilizer such as polyester ether elastomer component is present in an amount from greater than 0 wt% to 5 wt%. In a still further embodiment, the polyester ether elastomer component is present in an amount from 1 wt% to 5 wt%. In a yet further embodiment, the polyester ether elastomer component is present in an amount from 1.5 wt% to 4.0 wt%. In an even further embodiment, the polyester ether elastomer component is present in an amount from 1.5 wt% to 3.5 wt%. In a still further embodiment, the polyester ether elastomer component is present in an amount from 1 wt% to 5 wt%.

    [0125] In a further embodiment, an acrylic impact modifier such as a poly(ethylene-co-ethylacrylate) component is present in an amount from greater than 0 wt% to 5 wt%. In a still further embodiment, the poly(ethylene-co-ethylacrylate) component is present in an amount from 1 wt% to 5 wt%. In a yet further embodiment, the poly(ethylene-co-ethylacrylate) component is present in an amount from 1 wt% to 4 wt%. In an even further embodiment, the poly(ethylene-co-ethylacrylate) component is present in an amount from 1.2 wt% to 3.9 wt%. In a still further embodiment, the poly(ethylene-co-ethylacrylate) component is present in an amount from 1.3 wt% to 3.1 wt%. In a yet further embodiment, the poly(ethylene-co-ethylacrylate) component is present in an amount from 1.3 wt% to 2.4 wt%.

    [0126] In a further embodiment, a compatibilizer for PC/PBT such as ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component is present in an amount from greater than 0 wt% to 3 wt%. In a still further embodiment, the ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component is present in an amount from 0.5 wt% to 3.0 wt%. In a yet further embodiment, the ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component is present in an amount from 0.5 wt% to 2.0 wt%. In an even further embodiment, the ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component is present in an amount from 0.7 wt% to 1.6 wt%. In a still further embodiment, the ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component is present in an amount from 0.7 wt% to 1.2 wt%.

    [0127] In various embodiments, the blended thermoplastic compositions of the present disclosure further comprise a transesterification quenching agent. In a further embodiment, the transesterification quenching agent is a phosphorus-containing stabilizer. In a still further embodiment, the transesterification quenching agent comprises a phosphorus-containing stabilizer. In a yet further embodiment, the transesterification quenching agent is an acidic phosphate salts, e.g. a monozinc phosphate, sodium dihydrogen phosphate, potassium hydrogen phosphate, calcium hydrogen phosphate, sodium acid pyrophosphate and mixtures thereof. In an even further embodiment, the transesterification quenching agent comprises a phosphite compounds, e.g. a phosphite compound of the general formula P-(OR')3 wherein each R' is the same or different and independently represents hydrogen, alkyl groups, aryl groups or any mixture thereof provided that at least one of the R' groups is hydrogen or alkyl. Illustratively, these include, but are not limited to, diphenylisodecyl phosphite, diisooctyl phosphite, dilauryl phosphite, diphenyl phosphite, phenyl diisodecyl phosphite, ethyl hexyl diphenyl phosphite, stearyl phosphite and mixtures thereof. In a still further embodiment, the transesterification quenching agent comprises a Group IB or Group IIB phosphate salt such as zinc phosphate. In a further embodiment, the transesterification quenching agent comprises a phosphorous oxo-acid such as phosphorous acid, phosphoric acid, polyphosphoric acid, or hypophosphorous acid.

    [0128] In a further embodiment, the phosphorus-containing stabilizer is selected from zinc phosphate, diphenylisodecyl phosphite, monosodium phosphate and sodium acid pyrophosphate and mixtures thereof. In a still further embodiment, the phosphorus-containing stabilizer is zinc phosphate.

    [0129] In a further embodiment, the transesterification quenching agent is selected from an acidic phosphate salt, a Group IB phosphate salt, a Group IIB phosphate salt, a phosphorus oxo-acid, and mixtures thereof. In a still further embodiment, the transesterification quenching agent is an acidic phosphate salt. In a yet further embodiment, the transesterification quenching agent is selected from a Group IB phosphate salt and a Group IIB phosphate salt. In an even further embodiment, the transesterification quenching agent is mono zinc phosphate. In a still further embodiment, the transesterification quenching agent is a phosphorus oxo-acid.

    [0130] In a further embodiment, the transesterification quenching agent is present in an amount from greater than 0 wt% to 1 wt%. In a still further embodiment, the transesterification quenching agent is present in an amount from greater than 0.05 wt% to 0.50 wt%. In a yet further embodiment, the transesterification quenching agent is present in an amount from greater than 0.10 wt% to 0.25 wt%.

    [0131] In one embodiment, the blended thermoplastic compositions of the present disclosure can optionally further comprise an epoxy hydrostabilizer agent. In a further embodiment, the epoxy hydrostabilizer agent is an oligomeric epoxide. In a still further embodiment, the oligomeric epoxide is a bisphenol A epoxide oligomer. In a yet further embodiment, the Bisphenol A epoxide oligomer is a bisphenol A diglycidyl ether.

    [0132] For example, the epoxy hydrostabilizer agent can be an epoxy resin formed from reacting epichlorohydrin with bisphenol A to form diglycidyl ethers of bisphenol A. The simplest resin of this class is formed from reacting two moles of epichlorohydrin with one mole of bisphenol A to form the bisphenol A diglycidyl ether (commonly abbreviated to "DGEBA" or "BADGE"). DGEBA resins are transparent colorless-to-pale-yellow liquids at room temperature, with viscosity typically in the range of 5-15 pascal second (Pa•s) at 25°C. Industrial grades normally contain some distribution of molecular weight, since pure DGEBA shows a strong tendency to form a crystalline solid upon storage at ambient temperature.

    [0133] Exemplary epoxy hydrostabilizer agents useful in the blended thermoplastic compositions of the present disclosure are commercially available under the trade names EPON™ 1001, EPON™ 1002, EPON™ 1004, EPON™ 1007, and EPON™ 1009 (all available from Momentive Performance Materials Holdings, LLC); GT 6063, GT 6084, and GT 6097 (all available from Vantico); DER 661 and DER 662 (available from Dow Chemical); and Epiclon 1050, Epiclon 2050, Epiclon 3050, Epiclon 4050, and Epiclon 7050 (all available from DIC International (USA), LLC).

    [0134] In a further embodiment, the epoxy hydrostabilizer agent of the present is a low viscosity, low molecular weight material. In a still further embodiment, the epoxy hydrostablizer agent has a weight average molecular weight of less than or 5,000 g/mol when determined by gel permeation chromatography using polystyrene standards. In a yet further embodiment, the epoxy hydrostablizer agent has a weight average molecular weight of less than or 2,000 g/mol when determined by gel permeation chromatography using polystyrene standards. In an even further embodiment, the epoxy hydrostablizer agent has a weight average molecular weight of less than or 1,500 g/mol when determined by gel permeation chromatography using polystyrene standards. In a still further embodiment, the epoxy hydrostablizer agent has a weight average molecular weight of less than or 1,000 g/mol when determined by gel permeation chromatography using polystyrene standards.

    [0135] In a further embodiment, the epoxy hydrostablizer agent has an epoxide gram equivalent weight (g/eq) from 400 g/eq to 2000 g/eq. In a still further embodiment, the epoxy hydrostablizer agent has an epoxide equivalent weight from 400 g/eq to 1000 g/eq.

    [0136] In a further embodiment, the epoxy hydrostabilizer agent is present in an amount from greater than 0 wt% to 5 wt%. In a still further embodiment, the epoxy hydrostabilizer agent is present in an amount from greater than 0.5 wt% to 3.5 wt%. In a yet further embodiment, the epoxy hydrostabilizer agent is present in an amount from greater than 1.0 wt% to 2.5 wt%.

    [0137] In one embodiment, the disclosed blended thermoplastic compositions comprise a glass fiber component. In a further embodiment, the glass fiber used is selected from E-glass, S-glass, AR-glass, T-glass, D-glass and R-glass. In a still further embodiment, the glass fiber used is selected from E-glass, S-glass, and combinations thereof. In a still further embodiment, the glass fiber is one or more S-glass materials. High-strength glass is generally known as S-type glass in the United States, R-glass in Europe and T-glass in Japan. S-glass was originally developed for military applications in the 1960s, and a lower cost version, S-2 glass, was later developed for commercial applications. High-strength glass has appreciably higher amounts of silica oxide, aluminum oxide and magnesium oxide than E-glass. S-2 glass is approximately 40-70% stronger than E-glass. The glass fibers can be made by standard processes, e.g., by steam or air blowing, flame blowing, and mechanical pulling. Exemplary glass fibers for polycarbonate reinforcement are made by mechanical pulling.

    [0138] The glass fibers may be sized or unsized. Sized glass fibers are coated on their surfaces with a sizing composition selected for compatibility with the polycarbonate. The sizing composition facilitates wet-out and wet-through of the polycarbonate upon the fiber strands and assists in attaining desired physical properties in the polycarbonate composition.

    [0139] In various further embodiments, the glass fiber is sized with a coating agent. In a further embodiment, the coating agent is present in an amount from 0.1 wt% to 5 wt% based on the weight of the glass fibers. In a still further embodiment, the coating agent is present in an amount from 0.1 wt% to 2 wt% based on the weight of the glass fibers.

    [0140] In preparing the glass fibers, a number of filaments can be formed simultaneously, sized with the coating agent and then bundled into what is called a strand. Alternatively the strand itself may be first formed of filaments and then sized. The amount of sizing employed is generally that amount which is sufficient to bind the glass filaments into a continuous strand and ranges from 0.1 to 5 wt%, 0.1 to 2 wt% based on the weight of the glass fibers. Generally, this may be 1.0 wt% based on the weight of the glass filament.

    [0141] In a further embodiment, the glass fiber can be continuous or chopped. In a still further embodiment, the glass fiber is continuous. In yet a further embodiment, the glass fiber is chopped. Glass fibers in the form of chopped strands may have a length of 0.3 millimeter (mm) to 10 centimeters (cm), specifically 0.5 millimeter to 5 centimeters, and more specifically 1.0 millimeter to 2.5 centimeters. In various further embodiments, the glass fiber has a length from 0.2 mm to 20 mm. In a yet further embodiment, the glass fiber has a length from 0.2 mm to 10 mm. In an even further embodiment, the glass fiber has a length from 0.7 mm to 7 mm. In this area, where a thermoplastic resin is reinforced with glass fibers in a composite form, fibers having a length of 0.4 mm are generally referred to as long fibers, and shorter ones are referred to as short fibers. In a still further embodiment, the glass fiber can have a length of 1 mm or longer. In yet a further embodiment, the glass fiber can have a length of 2 mm or longer.

    [0142] In a further embodiment, the glass fiber component is present in an amount from greater than 0 wt% to 60 wt%. In a still further embodiment, the glass fiber component is present in an amount from greater than 10 wt% to 60 wt%. In a yet further embodiment, the glass fiber component is present in an amount from greater than 20 wt% to 60 wt%. In an even further embodiment, the glass fiber component is present in an amount from greater than 30 wt% to 60 wt%. In a still further embodiment, the glass fiber component is present in an amount from greater than 30 wt% to 57 wt%.

    [0143] In various further embodiments, the glass fiber has a round (or circular), flat, or irregular cross-section. Thus, use of non-round fiber cross sections is possible. In a still further embodiment, the glass fiber has a circular cross-section. In yet further embodiment, the diameter of the glass fiber is from 1 to 35 micrometers (µm). In an even further embodiment, the diameter of the glass fiber is from 4 to 35 µm. In a still further embodiment, the diameter of the glass fiber is from 5 to 30 µm. In a further embodiment, the diameter of the glass fiber can range from 10 to 20 µm. In a further embodiment, the glass fiber has a diameter from 2 µm to 15 µm. In a yet further embodiment, the glass fiber has a diameter from 3 µm to 8 µm

    [0144] In addition to the foregoing components, the disclosed blended thermoplastic compositions can optionally comprise a balance amount of one or more additive materials ordinarily incorporated in polycarbonate resin compositions of this type, with the proviso that the additives are selected so as to not significantly adversely affect the desired properties of the polycarbonate composition. Combinations of additives can be used. Such additives can be mixed at a suitable time during the mixing of the components for forming the composition. Exemplary and non-limiting examples of additive materials that can be present in the disclosed polycarbonate compositions include additional reinforcing fillers, an acid scavenger, anti-drip agent, antioxidant, antistatic agent, chain extender, colorant (e.g., pigment and/or dye), de-molding agent, flow promoter, lubricant, mold release agent, plasticizer, quenching agent, flame retardant stabilizer (including for example a thermal stabilizer, a hydrolytic stabilizer, or a light stabilizer), ultraviolet ("UV") absorbing additive, and UV reflecting additive, or any combination thereof. In a further embodiment, the additive is selected from an antioxidant, antistatic agent, chain extender, colorant, de-molding agent, dye, flow promoter, flow modifier, light stabilizer, lubricant, mold release agent, pigment, quenching agent, thermal stabilizer, UV absorbent substance, UV reflectant substance, and UV stabilizer, or combinations thereof.

    [0145] In a further embodiment, the disclosed blended thermoplastic compositions can further comprise a primary antioxidant or "stabilizer" (e.g., a hindered phenol) and, optionally, a secondary antioxidant (e.g., a phosphate and/or thioester). Suitable antioxidant additives include, for example, organic phosphites such as tris(nonyl phenyl)phosphite, tris(2,4-di-t-butylphenyl)phosphite, bis(2,4-di-t-butylphenyl)pentaerythritol diphosphite, distearyl pentaerythritol diphosphite or the like; alkylated monophenols or polyphenols; alkylated reaction products of polyphenols with dienes, such as tetrakis[methylene(3,5-di-tert-butyl-4-hydroxyhydrocinnamate)]methane, or the like; butylated reaction products of para-cresol or dicyclopentadiene; alkylated hydroquinones; hydroxylated thiodiphenyl ethers; alkylidene-bisphenols; benzyl compounds; esters of beta-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionic acid with monohydric or polyhydric alcohols; esters of beta-(5-tert-butyl-4-hydroxy-3-methylphenyl)-propionic acid with monohydric or polyhydric alcohols; esters of thioalkyl or thioaryl compounds such as distearylthiopropionate, dilaurylthiopropionate, ditridecylthiodipropionate, octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, pentaerythrityl-tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate or the like; amides of beta-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionic acid or the like, or combinations comprising at least one of the foregoing antioxidants.

    [0146] In a further embodiment, the antioxidant is a primary antioxidant, a secondary antioxidant, or combinations thereof. In a still further embodiment, the primary antioxidant is selected from a hindered phenol and secondary aryl amine, or a combination thereof. In yet a further embodiment, the hindered phenol comprises one or more compounds selected from triethylene glycol bis[3-(3-t-butyl-5-methyl-4-hydroxyphenyl)propionate], 1,6-hexanediol bis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], 2,4-bis(n-octylthio)-6-(4-hydroxy-3,5-di-t-butylanilino)-1,3,5-triazine, pentaerythrityl tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], 2,2-thiodiethylene bis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], octadecyl 3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate, N,N'-hexamethylene bis(3,5-di-t-butyl-4-hydroxy-hydrocinnamamide), tetrakis(methylene 3,5-di-tert-butyl-hydroxycinnamate)methane, and octadecyl 3,5-di-tert-butylhydroxyhydrocinnamate. In an even further embodiment, the hindered phenol comprises octadecyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)-propionate.

    [0147] In a further embodiment, the secondary anti-oxidant is selected from an organophosphate and thioester, or a combination thereof In a still further embodiment, the secondary anti-oxidant comprises one or more compounds selected from tetrakis(2,4-di-tert-butylphenyl) [1,1-biphenyl]-4,4'-diylbisphosphonite, tris(2,4-di-tert-butylphenyl) phosphite, bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite, bis(2,4-dicumylphenyl)pentaerytritoldiphosphite, tris(nonyl phenyl)phosphite, and distearyl pentaerythritol diphosphite. In yet a further embodiment, the secondary anti-oxidant comprises tris(2,4-di-tert-butylphenyl) phosphite.

    [0148] Antioxidants are generally used in amounts of 0.01 wt% to 3 wt%, optionally 0.05 wt% to 2.0 wt% of the blended thermoplastic composition.

    [0149] In a further embodiment, the primary antioxidant is present in an amount from 0.01 wt% to 3 wt%. In another embodiment, the primary antioxidant is present in an amount from 0.01 wt% to 2.5 wt%. In still another embodiment, the primary antioxidant is present in an amount from 0.5 wt% to 2.5 wt%. In yet a further embodiment, the primary antioxidant is present in an amount from 0.5 wt% to 2.0 wt%. In still another embodiment, the primary antioxidant is present in an amount from 0.1 wt% to 0.5 wt%. In still another embodiment, the primary antioxidant is present in an amount from 0.2 wt% to 0.5 wt%. In still another embodiment, the primary antioxidant is present in an amount from 0.2 wt% to 0.4 wt%. In a yet further embodiment, the primary anti-oxidant is present in an amount from 0.01 wt% to 0.50 wt%. In an even further embodiment, the primary anti-oxidant is present in an amount from 0.05 wt% to 0.25 wt%.

    [0150] In a further embodiment, the secondary antioxidant is present in an amount from 0.01 wt% to 3.0 wt%. In another embodiment, the secondary antioxidant is present in an amount from 0.01 wt% to 2.5 wt%. In still another embodiment, the secondary antioxidant is present in an amount from 0.5 wt% to 2.5 wt%. In yet another embodiment, the secondary antioxidant is present in an amount from 0.5 wt% to 2.0 wt%. In still another embodiment, the secondary antioxidant is present in an amount from 0.05 wt% to 0.4 wt%. In still another embodiment, the secondary antioxidant is present in an amount from 0.05 wt% to 0.2 wt%. In a yet further embodiment, the secondary anti-oxidant is present in an amount from 0.01 wt% to 0.50 wt%. In an even further embodiment, the secondary anti-oxidant is present in an amount from 0.05 wt% to 0.25 wt%.

    [0151] In various embodiments, the disclosed blended thermoplastic compositions further comprise a hydrolytic stabilizer, wherein the hydrolytic stabilizer comprises a hydrotalcite and an inorganic buffer salt. In a further embodiment, the disclosed polycarbonate blend composition comprises a hydrolytic stabilizer, wherein the hydrolytic stabilizer comprises one or more hydrotalcites and an inorganic buffer salt comprising one or more inorganic salts capable of pH buffering. Either synthetic hydrotalcites or natural hydrotalcites can be used as the hydrotalcite compound in the present disclosure. Exemplary hydrotalcites that are useful in the compositions of the present are commercially available and include, but are not limited to, magnesium hydrotalcites such as DHT-4C (available from Kyowa Chemical Co.); Hysafe 539 and Hysafe 530 (available from J.M. Huber Corporation).

    [0152] In a further embodiment, suitable thermal stabilizer additives include, for example, organic phosphites such as triphenyl phosphite, tris-(2,6-dimethylphenyl)phosphite, tris-(mixed mono-and di-nonylphenyl)phosphite or the like; phosphonates such as dimethylbenzene phosphonate or the like, organic phosphates such as trimethyl phosphate, thioesters such as pentaerythritol betalaurylthiopropionate, and the like, or combinations comprising at least one of the foregoing thermal stabilizers.

    [0153] Thermal stabilizers are generally used in amounts of 0.01wt% to 5 wt%, optionally 0.05 wt% to 2.0 wt% of the polycarbonate blend composition. In one embodiment, the thermal stabilizer is present in an amount from 0.01 wt% to 3.0 wt%. In another embodiment, the thermal stabilizer is present in an amount from 0.01 wt% to 2.5 wt%. In still another embodiment, the thermal stabilizer is present in an amount from 0.5 wt% to 2.5 wt%. In still another embodiment, the thermal stabilizer is present in an amount from 0.5 wt% to 2.0 wt%. In still another embodiment, the thermal stabilizer is present in an amount from 0.1 wt% to 0.8 wt%. In still another embodiment, the thermal stabilizer is present in an amount from 0.1 wt% to 0.7 wt%. In still another embodiment, the thermal stabilizer is present in an amount from 0.1 wt% to 0.6 wt%. In still another embodiment, the thermal stabilizer is present in an amount from 0.1 wt% to 0.5 wt%. In still another embodiment, the thermal stabilizer is present in an amount from 0.1 wt% to 0.4 wt%. In still another embodiment, the thermal stabilizer is present in an amount from 0.05 wt% to 1.0 wt%.

    [0154] In various embodiments, plasticizers, lubricants, and/or mold release agents additives can also be used. There is a considerable overlap among these types of materials, which include, for example, phthalic acid esters such as dioctyl-4,5-epoxy-hexahydrophthalate; tris(octoxycarbonylethyl)isocyanurate; tristearin; di- or polyfunctional aromatic phosphates such as resorcinol tetraphenyl diphosphate ("RDP"), the bis(diphenyl)phosphate of hydroquinone and the bis(diphenyl)phosphate of bisphenol-A; poly-alpha-olefins; epoxidized soybean oil; silicones, including silicone oils; esters, for example, fatty acid esters such as alkyl stearyl esters, e.g. methyl stearate; stearyl stearate, pentaerythritol tetrastearate, and the like; mixtures of methyl stearate and hydrophilic and hydrophobic nonionic surfactants comprising polyethylene glycol polymers, polypropylene glycol polymers, and copolymers thereof; waxes such as beeswax, montan wax, paraffin wax or the like.

    [0155] Blended thermoplastic composition additives such as plasticizers, lubricants, and/or mold release agents additive are generally used in amounts of 0.01 wt% to 20 wt%, optionally 0.5 wt% to 10 wt% the polycarbonate blend composition. In one embodiment, the mold release agent is methyl stearate; stearyl stearate or pentaerythritol tetrastearate. In another embodiment, the mold release agent is pentaerythritol tetrastearate.

    [0156] In various embodiments, the mold release agent is present in an amount from 0.01 wt% to 3.0 wt%. In another embodiment, the mold release agent is present in an amount from 0.01 wt% to 2.5 wt%. In still another embodiment, the mold release agent is present in an amount from 0.5 wt% to 2.5 wt%. In still another embodiment, the mold release agent is present in an amount from 0.5 wt% to 2.0 wt%. In still another embodiment, the mold release agent is present in an amount from 0.1 wt% to 0.6 wt%. In still another embodiment, the mold release agent is present in an amount from 0.1 wt% to 0.5 wt%.

    [0157] In various embodiments, the blended thermoplastic compositions of the present disclosure can optionally comprise a flame retardant, wherein the flame retardant can comprise any flame retardant material or mixture of flame retardant materials suitable for use in the inventive polymer compositions. In one embodiment, the blended thermoplastic compositions of the present disclosure do not comprise a flame retardant.

    [0158] In various embodiments, the flame retardant is a phosphorus-containing flame retardant. In a further embodiment, the flame retardant is selected from an oligomeric phosphate flame retardant, polymeric phosphate flame retardant, an aromatic polyphosphate flame retardant, oligomeric phosphonate flame retardant, phenoxyphosphazene oligomeric flame retardant, or mixed phosphate/phosphonate ester flame retardant compositions.

    [0159] In a further embodiment, the blended thermoplastic compositions comprise a flame retardant that is a non-brominated and non-chlorinated phosphorous-containing compound such as an organic phosphate. Exemplary organic phosphates can include an aromatic phosphate of the formula (GO)3P=O, wherein each G is independently an alkyl, cycloalkyl, aryl, alkaryl, or aralkyl group, provided that at least one G is an aromatic group. Two of the G groups can be joined together to provide a cyclic group, for example, diphenyl pentaerythritol diphosphate, which is described by Axelrod in U.S. Pat. No. 4,154,775. Other suitable aromatic phosphates can be, for example, phenyl bis(dodecyl)phosphate, phenyl bis(neopently)phosphate, phenyl bis(3,5,5'-trimethylhexyl)phosphate, ethyl diphenyl phosphate, 2-ethylhexyl di(p-tolyl)phosphate, bis (2-ethylhexyl)p-tolyl phosphate, tritolyl phosphate, bis(2-ethylhexyl)phenyl phosphate, dibutyl phenyl phosphate, 2-chloroethyl diphenyl phosphate, p-tolyl bis(2,5,5'-trimethylhexyl)phosphate, 2-ethylhexyl diphenyl phosphate, or the like. A specific aromatic phosphate is one in which each G is aromatic, for example, triphenyl phosphate, tricresyl phosphate, isopropylated triphenyl phosphate, and the like.

    [0160] In a further embodiment, di- or polyfunctional aromatic phosphorous-containing compounds can also be present. Examples of suitable di- or polyfunctional aromatic phosphorous-containing compounds include triphenyl phosphate ("TPP"), resorcinol tetraphenyl diphosphate (RDP), the bis(diphenyl)phosphate of hydroquinone and the bis(diphenyl)phosphate of bisphenol-A, respectively, their oligomeric and polymeric counterparts, and the like.

    [0161] In a further embodiment, the flame retardant can be an organic compounds containing phosphorous-nitrogen bonds. For example, phosphonitrilic chloride, phosphorous ester amides, phosphoric acid amides, phosphonic acid amides, phosphinic acid amides, tris(aziridinyl)phosphine oxide, or the like. In one embodiment, a phenoxyphosphazene is used as a flame retardant.

    [0162] Exemplary flame retardants include aromatic cyclic phosphazenes having a structure represented by the formula:

    wherein each of A1 and A2 is independently an aryl group having 6 to 10 carbon atoms substituted with 0 to 4 C1-C4 alkyl groups; and n is an integer of 3 to 6. The aryl group of A1 and A2 means an aromatic hydrocarbon group having 6 to 10 atoms. Examples of such groups include phenyl and naphthyl groups. In a further embodiment, the aryl group of A1 and A2 is independently selected from phenyl and naphthyl. In a still further embodiment, the aryl group of A1 and A2 is phenyl. In a further embodiment, aromatic cyclic phosphazene compound is a mixture of compounds represented by the foregoing formula, comprising a mixture of compounds with n=3, n=4, n=5, and n=6.

    [0163] The "aryl group having 6 to 10 carbon atoms" can be substituted with 0 to 4 C1-C4 alkyl groups, wherein the alkyl group means a straight or branched saturated hydrocarbon group having 1 to 4 carbon atoms. Examples of the group include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group. In various further embodiments, the alkyl group has 1 to 3 carbon atoms. In a still further embodiment, the alkyl group is methyl.

    [0164] In a further embodiment, each of A1 and A2 is a phenyl group, wherein each of A1 and A2 is independently substituted with 0 to 4 C1-C4 alkyl groups. In a still further embodiment, each of A1 and A2 is a phenyl group, wherein each of A1 and A2 is independently substituted with 0 to 4 C1-C3 alkyl groups. In a yet further embodiment, each of A1 and A2 is a phenyl group independently substituted with 0 to 4 methyl groups. In an even further embodiment, each of A1 and A2 is independently selected from phenyl, o-tolyl, p-tolyl, and m-tolyl.

    [0165] In various further embodiments, three to six A1 groups are present, wherein each A1 group can be the same as or different from each other. In a further embodiment, three to six A1 groups are present, wherein each A1 group is the same.

    [0166] In various further embodiments, three to six A2 groups are present, wherein each A2 group can be the same as or different from each other. In a further embodiment, three to six A2 groups are present, wherein each A2 group is the same. In a yet further embodiment, each A1 and each A2 are the same moiety.

    [0167] In a further embodiment, aromatic cyclic phosphazenes useful in the present disclosure are compounds having a structure represented by the formula:

    wherein each occurrence of X1 and X2 is independently a C1-C4 alkyl group; wherein each of m1 and m2 is independently an integer of 0 to 4; and wherein n is an integer of 3 to 6. As described above, alkyl group means a straight or branched saturated hydrocarbon group having 1 to 4 carbon atoms. Examples of the group include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group. In various further embodiments, the alkyl group has 1 to 3 carbon atoms. In a still further embodiment, the alkyl group is methyl. In a further embodiment, each of m1 and m2 is independently an integer of 0 to 3. In a still further embodiment, each of m1 and m2 is independently an integer of 0 to 2. In a yet further embodiment, each of m1 and m2 is independently an integer that is 0 or 1. In an even further embodiment, each of m1 and m2 is 0. In a still further embodiment, each of m1 and m2 is 1.

    [0168] In various further embodiments, three to six X1 groups are present, wherein each X1 group can be the same as or different from each other. In a further embodiment, three to six X1 groups are present, wherein each X1 group is the same.

    [0169] In various further embodiments, three to six X2 groups are present, wherein each X2 group can be the same as or different from each other. In a further embodiment, three to six X2 groups are present, wherein each X2 group is the same. In a yet further embodiment, each X1 and each X2 are the same moiety.

    [0170] In various further embodiments, the aromatic cyclic phosphazene is a compound selected from Examples of the compound represented by General Formula (I) include 2,2,4,4,6,6-hexaphenoxycyclotriphosphazene, 2,2,4,4,6,6-hexakis(p-tolyloxy)cyclotriphosphazene, 2,2,4,4,6,6-hexakis(m-tolyloxy)cyclotriphosphazene, 2,2,4,4,6,-hexakis(o-tolyloxy)cyclotriphosphazene, 2,4,6-triphenoxy-2,4,6-tris(p-tolyloxy)cyclotriphosphazene, 2,4,6-triphenoxy-2,4,6-tris(m-tolyloxy)cyclotriphosphazene, 2,4,6-triphenoxy-2,4,6-tris(o-tolyloxy)cyclotriphosphazene, 2,4,6-triphenoxy-2,4,6-tris(2-ethylphenoxy)cyclotriphosphazene, 2,4,6-triphenoxy-2,4,6-tris(3-ethylphenoxy)cyclotriphosphazene, 2,4,6-triphenoxy-2,4,6-tris(4-ethylphenoxy)cyclotriphosphazene, 2,4,6-triphenoxy-2,4,6-tris(2,3-xylyloxy)cyclotriphosphazene, 2,4,6-triphenoxy-2,4,6-tris(2,4-xylyloxy)cyclotriphosphazene, 2,4,6-triphenoxy-2,4,6-tris(2,5-xylyloxy)cyclotriphosphazene, 2,4,6-triphenoxy-2,4,6-tris(2,6-xylyloxy)cyclotriphosphazene, 2,4,6-triphenoxy-2,4,6-tris(3,4-xylyloxy)cyclotriphosphazene, 2,4,6-triphenoxy-2,4,6-tris(3,5-xylyloxy)cyclotriphosphazene, 2,2,4,4,6,6,8,8-octaphenoxycyclotetraphosphazene, 2,2,4,4,6,6,8,8-octakis(p-tolyloxy)cyclotetraphosphazene, 2,2,4,4,6,6,8,8-octakis(m-tolyloxy)cyclotetraphosphazene, 2,2,4,4,6,6,8,8-octakis(o-tolyloxy)cyclotetraphosphazene, 2,4,6,8-tetraphenoxy-2,4,6,8-tetrakis(p-tolyloxy)cyclotetraphosphazene, 2,4,6,8-tetraphenoxy-2,4,6,8-tetrakis(m-tolyloxy)cyclotetraphosphazene, and 2,4,6,8-tetraphenoxy-2,4,6,8-tetrakis(o-tolyloxy)cyclotetraphosphazene. In a still further embodiment, the aromatic cyclic phosphazene is selected from 2,2,4,4,6,6-hexaphenoxycyclotriphosphazene, 2,4,6-triphenoxy-2,4,6-tris(p-tolyloxy)cyclotriphosphazene, 2,4,6-triphenoxy-2,4,6-tris(m-tolyloxy)cyclotriphosphazene, and 2,4,6-triphenoxy-2,4,6-tris(o-tolylo xy)cyc lotriphosphazene.

    [0171] In a further embodiment, the aromatic cyclic phosphazene comprises at least one compound represented by one of the phosphazene formulas described herein as a main component. In various embodiments, the content of the aromatic cyclic phosphazene composition is 90 wt%. In a further embodiment, the content of the aromatic cyclic phosphazene composition is 95 wt%. In a still further embodiment, the content of the aromatic cyclic phosphazene composition is 100 wt%.

    [0172] Other components in the aromatic cyclic phosphazene composition are not specifically limited as long as the object of the present disclosure is not impaired. Aromatic cyclic phosphazene-containing flame retardant useful in the present disclosure are commerically available. Suitable examples of such commercial products include "Rabitle FP-110" and "Rabitle FP-390" manufactured by FUSHIMI Pharmaceutical Co., Ltd.

    [0173] In a further embodiment, the phosphorus-containing flame retardant is selected from a phosphine, a phosphine oxide, a bisphosphine, a phosphonium salt, a phosphinic acid salt, a phosphoric ester, and a phosphorous ester.

    [0174] In a further embodiment, the phosphorus-containing flame retardant is selected from rescorcinol bis(diphenyl phosphate), resorcinol bis(dixylenyl phosphate), hydroquinone bis(diphenyl phosphate), bisphenol-A bis(diphenyl phosphate), 4,4'-biphenol bis(diphenyl phosphate), triphenyl phosphate, methylneopentyl phosphite, pentaerythritol diethyl diphosphite, methyl neopentyl phosphonate, phenyl neopentyl phosphate, pentaerythritol diphenyldiphosphate, dicyclopentyl hypodiphosphate, dineopentyl hypophosphite, phenylpyrocatechol phosphite, ethylpyrocatechol phosphate and dipyrocatechol hypodiphosphate. In a still further embodiment, the flame retardant is selected from triphenyl phosphate; cresyldiphenylphosphate; tri(isopropylphenyl)phosphate; resorcinol bis(diphenylphosphate); and bisphenol-A bis(diphenyl phosphate). In a yet further embodiment, resorcinol bis(biphenyl phosphate), bisphenol A bis(diphenyl phosphate) hydroquinone bis(diphenyl phosphate), phosphoric acid, 1,3-phenylene tetraphenyl ester), bis-phenol-A bis-diphenyl phosphate) or mixtures thereof. In an even further embodiment, the flame retardant is bisphenol-A bis(diphenyl phosphate). In a still further embodiment, the phosphorus-containing flame retardant is selected from resorcinol bis(biphenyl phosphate), bisphenol A bis(diphenyl phosphate), and hydroquinone bis(diphenyl phosphate), or mixtures thereof. In yet a further embodiment, the phosphorus-containing flame retardant is bisphenol A bis(diphenyl phosphate). In an even further embodiment, the phosphorus-containing flame retardant is resorcinol bis(biphenyl phosphate).

    [0175] In a further embodiment, the flame retardant is present in an amount from greater than 0 wt% to 15 wt%. In a still further embodiment, the flame retardant is present in an amount from 0.01 wt% to 15 wt%. In a yet further embodiment, the flame retardant is present in an amount from 0.1 wt% to 15 wt%. In an even further embodiment, the flame retardant is present in an amount from 1 wt% to 15 wt%.

    [0176] In a further embodiment, the flame retardant is present in an amount from 1 wt% to 1 wt%. In a still further embodiment, the flame retardant is present in an amount from 1 wt% to 13 wt%. In yet a further embodiment, the flame retardant is present in an amount from 1 wt% to 12 wt%. In an even further embodiment, the flame retardant is present in an amount from 2 wt% to 12 wt%. In a still further embodiment, the flame retardant is present in an amount from 3 wt% to 12 wt%. In yet a further embodiment, the flame retardant is present in an amount from 4 wt% to 12 wt%. In an even further embodiment, the flame retardant is present in an amount from 4 wt% to 11 wt%. In a still further embodiment, the flame retardant is present in an amount from 4 wt% to 10 wt%. In yet a further embodiment, the flame retardant is present in an amount from 5 wt% to 10 wt%. In an even further embodiment, the flame retardant is present in an amount from 6 wt% to 10 wt%.

    [0177] In a further embodiment, an anti-drip agent can also be present. In a further embodiment, the anti-drip agent is a styrene-acrylonitrile copolymer encapsulated polytetrafluoroethylene. Exemplary anti-drip agents can include a fibril forming or non-fibril forming fluoropolymer such as polytetrafluoroethylene ("PTFE"). The anti-drip agent can optionally be encapsulated by a rigid copolymer, for example styrene-acrylonitrile ("SAN"). PTFE encapsulated in SAN is known as "TSAN." Encapsulated fluoropolymers can be made by polymerizing the encapsulating polymer in the presence of the fluoropolymer, for example, in an aqueous dispersion. TSAN can provide significant advantages over PTFE, in that TSAN can be more readily dispersed in the composition. A suitable TSAN can comprise, for example, 50 wt % PTFE and 50 wt % SAN, based on the total weight of the encapsulated fluoropolymer. Alternatively, the fluoropolymer can be pre-blended in some manner with a second polymer, such as for, example, an aromatic polycarbonate resin or SAN to form an agglomerated material for use as an anti-drip agent. Either method can be used to produce an encapsulated fluoropolymer.

    [0178] In a further embodiment, the anti-drip agent is present in an amount from 0.01 wt% to 3 wt%. In a still further embodiment, the anti-drip agent is present in an amount from 0.01 wt% to 2.5 wt%. In yet a further embodiment, the anti-drip agent is present in an amount from 0.5 wt% to 2.0 wt%.

    [0179] In various embodiments, the blended thermoplastic compositions of the present disclosure can optionally further comprise reinforcing fillers in addition to one or more glass fiber fillers as described herein above. For example, suitable fillers or reinforcing agents include any materials known for these uses, provided that they do not adversely affect the desired properties. For example, suitable fillers and reinforcing agents include silicates and silica powders such as aluminum silicate (mullite), synthetic calcium silicate, zirconium silicate, fused silica, crystalline silica graphite, natural silica sand, or the like; boron powders such as boron-nitride powder, boron-silicate powders, or the like; oxides such as TiO2, aluminum oxide, magnesium oxide, or the like; calcium sulfate (as its anhydride, dehydrate or trihydrate); calcium carbonates such as chalk, limestone, marble, synthetic precipitated calcium carbonates, or the like; talc, including fibrous, modular, needle shaped, lamellar talc, or the like; wollastonite; surface-treated wollastonite; glass spheres such as hollow and solid glass spheres, silicate spheres, cenospheres, aluminosilicate (armospheres), or the like; kaolin, including hard kaolin, soft kaolin, calcined kaolin, kaolin comprising various coatings known in the art to facilitate compatibility with the polymeric matrix resin, or the like; single crystal fibers or "whiskers" such as silicon carbide, alumina, boron carbide, iron, nickel, copper, or the like; fibers (including continuous and chopped fibers) such as asbestos, carbon fibers; sulfides such as molybdenum sulfide, zinc sulfide, or the like; barium compounds such as barium titanate, barium ferrite, barium sulfate, heavy spar, or the like; metals and metal oxides such as particulate or fibrous aluminum, bronze, zinc, copper and nickel, or the like; flaked fillers such as glass flakes, flaked silicon carbide, aluminum diboride, aluminum flakes, steel flakes or the like; fibrous fillers, for example short inorganic fibers such as those derived from blends comprising at least one of aluminum silicates, aluminum oxides, magnesium oxides, and calcium sulfate hemihydrate or the like; natural fillers and reinforcements, such as wood flour obtained by pulverizing wood, fibrous products such as kenaf, cellulose, cotton, sisal, jute, flax, starch, corn flour, lignin, ramie, rattan, agave, bamboo, hemp, ground nut shells, corn, coconut (coir), rice grain husks or the like; organic fillers such as polytetrafluoroethylene, reinforcing organic fibrous fillers formed from organic polymers capable of forming fibers such as poly(ether ketone), polyimide, polybenzoxazole, poly(phenylene sulfide), polyesters, polyethylene, aromatic polyamides, aromatic polyimides, polyetherimides, polytetrafluoroethylene, acrylic resins, poly(vinyl alcohol) or the like; as well as additional fillers and reinforcing agents such as mica, clay, feldspar, flue dust, fillite, quartz, quartzite, perlite, Tripoli, diatomaceous earth, carbon black, or the like, or combinations comprising at least one of the foregoing fillers or reinforcing agents. In a still further embodiment, the filler is talc, glass fiber, kenaf fiber, or combinations thereof. In yet a further embodiment, the filler is glass fiber. The fillers and reinforcing agents can be coated with a layer of metallic material to facilitate conductivity, or surface treated with silanes, siloxanes, or a combination of silanes and siloxanes to improved adhesion and dispersion with the polymeric matrix resin.

    [0180] In a further embodiment, the additional reinforcing filler is selected from carbon fiber, a mineral filler, or combinations thereof. In a still further embodiment, the reinforcing filler is selected from mica, talc, clay, wollastonite, zinc sulfide, zinc oxide, carbon fiber, ceramic-coated graphite, titanium dioxide, or combinations thereof.

    [0181] In a further embodiment, the reinforcing fillers can be provided in the form of monofilament or multifilament fibers and can be used either alone or in combination with other types of fiber, for example, co-weaving or core/sheath, side-by-side, orange-type or matrix and fibril constructions, or by other methods known to one skilled in the art of fiber manufacture. Suitable co-woven structures include, for example, glass fiber-carbon fiber, carbon fiber-aromatic polyimide (aramid) fiber, and aromatic polyimide fiberglass fiber or the like. Fibrous fillers can be supplied in the form of, for example, rovings, woven fibrous reinforcements, such as 0-90 degree fabrics or the like; non-woven fibrous reinforcements such as continuous strand mat, chopped strand mat, tissues, papers and felts or the like; or three-dimensional reinforcements such as braids.

    [0182] In one embodiment, the reinforcing fillers can be surface-treated with a surface treatment agent containing a coupling agent. Suitable coupling agents include, but are not limited to, silane-based coupling agents, or titanate-based coupling agents, or a mixture thereof. Applicable silane-based coupling agents include aminosilane, epoxysilane, amidosilane, azidosilane and acrylsilane.

    [0183] In various embodiments, the surface coating can range in amount from 0.1 wt% to 5.0 wt% of the total weight of the filler and surface coating. In a further embodiment, the surface coating can range in amount from 0.1 wt% to 2.0 wt% of the total weight of the filler and surface coating.

    [0184] In a further embodiment, the reinforcing filler is particulate.

    [0185] In a further embodiment, the reinforcing filler is fibrous. In a still further embodiment, the fibrous filler has a circular cross-section. In yet a further embodiment, the fibrous filler has a non-circular cross-section.

    [0186] In a further embodiment, the additional reinforcing filler is a carbon fiber. In a still further embodiment, the carbon fiber is continuous. In yet a further embodiment, the carbon fiber is chopped. In an even further embodiment, the carbon fiber has a round, flat, or irregular cross-section. In a still further embodiment, the carbon fiber has a round cross-section. In yet a further embodiment, the carbon fiber has a diameter from 4 µm to 15 µm.

    [0187] The blended thermoplastic compositions of the present disclosure can be blended with the aforementioned ingredients by a variety of methods involving intimate admixing of the materials with any additional additives desired in the formulation. Because of the availability of melt blending equipment in commercial polymer processing facilities, melt processing methods are generally preferred. Illustrative examples of equipment used in such melt processing methods include: co-rotating and counter-rotating extruders, single screw extruders, co-kneaders, disc-pack processors and various other types of extrusion equipment. The temperature of the melt in the present process is preferably minimized in order to avoid excessive degradation of the resins. It is often desirable to maintain the melt temperature between 230°C and 350°C in the molten resin composition, although higher temperatures can be used provided that the residence time of the resin in the processing equipment is kept short. In some embodiments the melt processed composition exits processing equipment such as an extruder through small exit holes in a die. The resulting strands of molten resin are cooled by passing the strands through a water bath. The cooled strands can be chopped into small pellets for packaging and further handling.

    [0188] Compositions can be manufactured by various methods. For example, the polycarbonate polymer, polyester polymer, the flame retardant, the reinforcing filler and/or other optional components are first blended in a HENSCHEL-Mixer™ high speed mixer. Other low shear processes, including but not limited to hand mixing, can also accomplish this blending. The blend is then fed into the throat of a twin-screw extruder via a hopper. Alternatively, at least one of the components can be incorporated into the composition by feeding directly into the extruder at the throat and/or downstream through a sidestuffer. Additives can also be compounded into a masterbatch with a desired polymeric resin and fed into the extruder. The extruder is generally operated at a temperature higher than that necessary to cause the composition to flow. The extrudate is immediately quenched in a water batch and pelletized. The pellets, so prepared, when cutting the extrudate can be one-fourth inch long or less as desired. Such pellets can be used for subsequent molding, shaping, or forming.

    [0189] In one embodiment, the present disclosure pertains to methods of improving the impact strength and dielectric constant of a blended thermoplastic composition, the method comprising the step of combining: (a) from 5 wt% to 25 wt% of a polycarbonate component; (b) from 20 wt% to 50 wt% of a polybutylene terephthalate component; (c) from greater than 0 wt% to 5 wt% of a polyester ether elastomer component; (d) from greater than 0 wt% to 5 wt% of an poly(ethylene-co-ethylacrylate) component; (e) from greater than 0 wt% to 3 wt% of an ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component; and (f) from greater than 0 wt% to 60 wt% of a glass fiber component; wherein the wt% ratio of the polycarbonate component to polybutylene terephthalate component is less than or equal to 0.5; wherein the combined weight percent value of all components does not exceed 100 wt%; wherein all weight percent values are based on the total weight of the composition.

    [0190] In one embodiment, the present disclosure pertains to methods of improving the impact strength and dielectric constant of a blended thermoplastic composition, the method comprising the step of combining: (a) from 5 wt% to 25 wt% of a polycarbonate component; (b) from 20 wt% to 50 wt% of a polybutylene terephthalate component; (c) from greater than 0 wt% to 5 wt% of a polyester ether elastomer component; (d) from greater than 0 wt% to 5 wt% of an poly(ethylene-co-ethylacrylate) component; (e) from greater than 0 wt% to 3 wt% of an ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component; (f) from greater than 0 wt% to 60 wt% of a glass fiber component; (g) from greater than 0 wt% to 2 wt% of a transesterification quencher; and (h) from greater than 0 wt% to 5 wt% of an epoxy hydrostabilizer agent; wherein the wt% ratio of the polycarbonate component to polybutylene terephthalate component is less than or equal to 0.5; wherein the combined weight percent value of all components does not exceed 100 wt%; and wherein all weight percent values are based on the total weight of the composition.

    [0191] In one embodiment, the present disclosure pertains to shaped, formed, or molded articles comprising the blended thermoplastic compositions. The blended thermoplastic compositions can be molded into useful shaped articles by a variety of means such as injection molding, extrusion, rotational molding, blow molding and thermoforming to form articles such as, for example, personal computers, notebook and portable computers, cell phone antennas and other such communications equipment, medical applications, radio frequency identification ("RFID") applications, automotive applications, and the like. In a further embodiment, the article is extrusion molded. In a still further embodiment, the article is injection molded.

    [0192] In various embodiments, the polymer composition can be used in the field of electronics. In a further embodiment, non-limiting examples of fields which can use the disclosed blended thermoplastic polymer compositions include electrical, electro-mechanical, radio frequency ("RF") technology, telecommunication, automotive, aviation, medical, sensor, military, and security. In a still further embodiment, the use of the disclosed blended thermoplastic polymer compositions can also be present in overlapping fields, for example in mechatronic systems that integrate mechanical and electrical properties which may, for example, be used in automotive or medical engineering.

    [0193] In a further embodiment, the article is an electronic device, automotive device, telecommunication device, medical device, security device, or mechatronic device. In a still further embodiment, the article is selected from a computer device, electromagnetic interference device, printed circuit, Wi-Fi device, Bluetooth device, global positional system ("GPS") device, cellular antenna device, smart phone device, automotive device, medical device, sensor device, security device, shielding device, RF antenna device, light emitting diode ("LED") device, and RFID device. In yet a further embodiment, the article is selected from a computer device, sensor device, security device, RF antenna device, LED device and RFID device. In an even further embodiment, the article is selected from a computer device, RF antenna device, LED device and RFID device. In a still further embodiment, the article is selected from a RF antenna device, LED device and RFID device. In yet a further embodiment, the article is selected from a RF antenna device and RFID device. In an even further embodiment, the article is a LED device. In a still further embodiment, the LED device is selected from a LED tube, a LED socket, and a LED heat sink.

    [0194] In various embodiments, molded articles according to the present disclosure can be used to produce a device in one or more of the foregoing fields. In a still further embodiment, non-limiting examples of such devices in these fields which can use the disclosed blended thermoplastic polymer compositions according to the present disclosure include computer devices, household appliances, decoration devices, electromagnetic interference devices, printed circuits, Wi-Fi devices, Bluetooth devices, GPS devices, cellular antenna devices, smart phone devices, automotive devices, military devices, aerospace devices, medical devices, such as hearing aids, sensor devices, security devices, shielding devices, RF antenna devices, or RFID devices.

    [0195] In a further embodiment, the molded articles can be used to manufacture devices in the automotive field. In a still further embodiment, non-limiting examples of such devices in the automotive field which can use the disclosed blended thermoplastic compositions in the vehicle's interior include adaptive cruise control, headlight sensors, windshield wiper sensors, and door/window switches. In a further embodiment, non-limiting examples of devices in the automotive field which can the disclosed blended thermoplastic compositions in the vehicle's exterior include pressure and flow sensors for engine management, air conditioning, crash detection, and exterior lighting fixtures.

    [0196] In a further embodiment, the resulting disclosed compositions can be used to provide any desired shaped, formed, or molded articles. For example, the disclosed compositions can be molded into useful shaped articles by a variety of means such as injection molding, extrusion, rotational molding, blow molding and thermoforming. As noted above, the disclosed compositions are particularly well suited for use in the manufacture of electronic components and devices. As such, according to some embodiments, the disclosed compositions can be used to form articles such as printed circuit board carriers, burn in test sockets, flex brackets for hard disk drives, and the like.

    EXAMPLES



    [0197] The following examples are put forth so as to provide those of ordinary skill in the art with a complete disclosure and description of how the compounds, compositions, articles, devices and/or methods claimed herein are made and evaluated, and are intended to be purely exemplary and are not intended to limit the disclosure. Efforts have been made to ensure accuracy with respect to numbers (e.g., amounts, temperature, etc.), but some errors and deviations should be accounted for. Unless indicated otherwise, parts are parts by weight, temperature is in °C or is at ambient temperature, and pressure is at or near atmospheric. Unless indicated otherwise, percentages referring to composition are in terms of wt%.

    [0198] There are numerous variations and combinations of reaction conditions, e.g., component concentrations, desired solvents, solvent mixtures, temperatures, pressures and other reaction ranges and conditions that can be used to optimize the product purity and yield obtained from the described process. Only reasonable and routine experimentation will be required to optimize such process conditions.

    [0199] The materials shown in Table 1 were used to prepare the compositions described and evaluated herein.
    Table 1.
    ItemDescriptionSupplier
    PBT (LM) Polybutylene terephthalate with an intrinsic viscosity from 0.63 to 0.68, and a melt viscosity from 740 to 900 poise; available under the trade name Valox™ 195. SABIC Innovative Plastics ("SABIC I.P.")
    PBT (HM) Polybutylene terephthalate with an intrinsic viscosity from 1.15 to 1.15, and a melt viscosity from 7500 to 9500 poise; available under the trade name Valox™ 315. SABIC I.P.
    PC High-flow-ductile (HFD, BPA-sebacic acid copolymer) PC copolymer with sebacic acid at 8% and below, Mw < 29,000 by PC standards. SABIC I.P.
    GF1 Chopped s-glass fibers HPXSS PAX95 at 10 µm diameter and 4 mm in length. Owens Corning
    GF2 Chopped e-glass fibers at 10 µm diameter CPIC
    HS Tris(2,4-ditert-butylphenyl) phosphite, CAS 31570-04-4; commercially available under the trade name IRGAFOS 168. Ciba Specialty Chemicals Corporation
    AO Pentaerythritol tetrakis(3,5-di-tert-butyl-4-hydroxy hydrocinnamate), CAS 6683-19-8; available under the trade name IRGANOX 1010. CIBA-GEIGY
    TQ Zinc phosphate monobasic (Zn(H2PO4)2). Z21-82 BUDENHEIM USA, INC
    NA1 Sodium Stearate. EA-FG Witco
    NA2 Silicon dioxide.  
    EH Diglycidylether of bisphenol A, MW∼1000. DER 661 Dow Chemical
    IM1 Polyester ether block copolymer with a polybutylene terephthalate block and a poly(tetrahydrofuran) block (45 wt%) and it has a melt mass flow rate (MFR) of 5.3 g/10 min when tested at 190 °C under a load of 2.16 kg when tested in accordance with ASTM D1238; available under the trade name Hytrel™ 4056. E. I. DuPont de Nemours & Co. ("DuPont")
    IM2 Poly(ethylene-co-ethylacrylate) that is 15 wt% ethyl acrylate and it has a melt mass flow rate (MFR) of 6 g/10 min when tested at 190 °C under a load of 2.16 kg when tested in accordance with ASTM D1238; available under the trade name Elvaloy™ 2615C. DuPont
    IM3 Blend of polycarbonate (80 wt%) and random terpolymer of ethylene, methyl acrylate and glycidyl methacrylate (20 wt%). Arkema, Inc.


    [0200] In each of the examples, sample batches (5 kg) were prepared by compounding the materials in a ZSK 40mm twin screw extruder. The barrel temperatures ranged from 470° F to 550 °F. The screw speed was 100 rpm and the feed rate was 110 lbs/hr. To make test specimens, the dried pellets were injection molded to form appropriate test samples with barrel temperatures of 510 to 550°F and mold temperature set to 200 to 225°F.

    [0201] Notched Izod impact strength ("NII") and unnotched Izod impact strength were determined in accordance with ASTM D256.

    [0202] Tensile strength, elongation, and modulus were determined in accordance with ASTM D638.

    [0203] Flexural strength and modulus were determined in accordance with ASTM D790.

    [0204] Dielectric constants (Dk) and dissipation factors (Df) were determined at the specified frequencies according to internal SABIC protocols, fo example, methods using split post dielectric resonators.

    [0205] Table 2 below shows the formulations of exemplary compositions of the present disclosure. Table 3 shows the formulations of two conventional thermoplastic blend compositions used as comparative compositions.
    Table 2.*
    No.ItemExample 1Example 2AExample 2BExample 3AExample 4
    1 PBT (LM) 46.11 32.69 37.5 33.40 29.07
    2 PBT (HM) --- 8 --- --- ---
    3 PC 14.0 12.0 11.11 9.0 7.0
    4 GF 22.0 35.0 32.41 45.0 55.0
    5 HS 0.15 0.1 0.14 0.15 0.15
    6 AO 0.15 0.06 0.14 0.15 0.15
    7 TQ 0.15 0.05 0.09 0.15 0.10
    8 NA1 0.10 0.05 0.05 0.05 0.03
    9 EH 1.50 1.50 1.39 1.50 1.00
    10 IM1 3.00 3.00 2.78 3.00 1.90
    11 IM2 3.74 2.151 1.99 2.20 1.50
    12 IM3 9.00 5.3 4.91 5.30 4.00
    TOTAL 100 100 100 100 100
               
    * Amounts provided in terms of percent of total composition (by weight).
    Table 3.*
     No. ItemXenoy 63709X11427
    1 PBT (LM) 23.87 26.13
    2 PBT (HM) 15.83 6.56
    3 HFD PC LM --- 11.5
    4 PC HM 5.89 ---
    5 PC LM 9.09 ---
    6 GF1 --- 44.0
    7 GF2 29.97 ---
    8 HS --- 0.15
    9 AO 0.06 0.15
    10 TQ 0.10 0.10
    11 NA2 0.20  
    12 IM1 11.99 9.16
    13 IM2 3.00 2.29
    TOTAL 100 100
    * Amounts provided in terms of percent of total composition (by weight).


    [0206] Table 4 below shows the mechanical properties of both the inventive and comparative compositions.
    Table 4.
    No.Test / DescriptionUnitExample 1Example 2Example 3AExample 4Xenoy 63709X11427
    1 Glass type -- S S S S E S
    2 Glass content wt% 20% 30% 45% 55% 30% 44%
    3 Viscosity at 3000-1 shear rate, 285 °C Pa.s 78 92 127 158 -- 172
    4 MFR (5 kg, 285 °C)* g/10min 60 33 32 14 24 6
    5 Tensile Modulus MPa 7626 11060 16800 21840 9750 14600
    6 Tensile Strength at Yield MPa 138 162 190 184 97 150
    7 Tensile Elongation % 3.0 2.6 2.5 1.5 3.0 2.7
    8 Flex Modulus MPa 6920 9680 14200 18200 5370 12900
    9 Flex Strength MPa 202 229 280 284 150 229
    10 Notched Izod Impact strength J/m 145 159 196 149 170 159
    11 Unotched Izod impact strength J/m 1060 1070 1230 938 640 1100
    *Except formulation 6370 at which was determined under the same load, but at 250 °C.


    [0207] As the data shows, Example 3A exhibited better overall mechanical performance when compared to 9X11427, which has a comparable s-glass content. Specifically, Example 3A showed lower viscosity and a higher melt flow index. Moreover, Example 3A exhibited both higher stiffness (tensile and flexural modulus) and higher strength (tensile and flexural strength) than 9X11427.

    [0208] To evaluate chemical resistance, both Example 3A and 9X11427 parts were then treated with diethylene triamine ("DETA"), a known solvent to of polycarbonate. To this end, DETA is often used to remove PC phase from the PBT phase for phase separation studies of PC/PBT blends.

    [0209] Figure 1 shows representative micrographs obtained by scanning electron microscopy (SEM) of representative blended thermoplastic compositions of the present disclosure before and after treatment with diethylenetriamine (DETA). (Panel A) a molded part formed from formulation 9X11427 prior to DETA treatment; (Panel B) a molded part formed from formulation 9X11427 after DETA treatment for 24 hr; (Panel C) a molded part formed from formulation Example 3A prior to DETA treatment; and (Panel D) a molded part formed from formulation Example 3A after DETA treatment for 24 hr.

    [0210] As the figures demonstrate, parts formed from the Example 3A formulation exhibit higher chemical resistance to DETA than the 9X11427 parts. Without wishing to be bound by a particular theory, it is believed that the PC phase is even distributed in a much smaller size scale in the continuous PBT phase. Additionally, it further believed that due to the low Mw PBT used in Example 3A, which crystalizes faster than high Mw PBT during processing, the crystallinity is higher in the Example 3A formulation, which can contribute to the improved chemical resistance.

    [0211] Next, the mechanical property retention was evaluated following chemical treatment of Example 2 (e.g., 2A-2B) (PC/PBT/35% s-glass) formulated with low Mw PBT ((Example 2A, in natural color) and high Mw PBT (Example 2B) in natural color). The samples were immersed in acids as follows: (Panel A) chemical treatment with acetic acid; (Panel B) chemical treatment with up to 40% nitric acid; (Panel C) chemical treatment with up to 75% sulfuric acid; and (Panel D) chemical treatment with up to 95% oleic acid. Table 5 below lists the chemical used to treat the sample and the mechanical retention of the samples following chemical treatment. The tensile tests were carried out under 0% strain rate after exposure to the chemicals for 2 hrs.
    Table 5.
    ChemicalTest DetailExample 2AExample 2B
    Acetic Acid Tensile Modulus of Elasticity 100% 103%
    Tensile Strength at Break 100% 100%
    % Elongation at Break 99% 103%
    Tensile Modulus of 101% 100%
    Up to 40% Nitric Acid Elasticity    
    Tensile Strength at Break 100% 100%
    % Elongation at Break 98% 101%
    Up to 75% Sulfiric Acid Tensile Modulus of Elasticity 101% 100%
    Tensile Strength at Break 100% 99%
    % Elongation at Break 99% 101%
    Tensile Modulus of Elasticity 102% 100%


    [0212] As the data reveals, the mechanical property retention for both formulation was exceptional (>95%). In addition to the excellent mechanical property retention, the parts also presented intact surfaces following chemical treatments.

    [0213] Next, the stain resistance of Example 2 was evaluated. In this assessment, test specimens are surface treated with various chemicals and compounds for 48 hours. Following the 48 hours, the surface of the test specimen was visually examined for visible surface stains. Surface examination of the samples revealed no noticeable stain after exposure for 48 hrs, except for sample chip (3), representing French's yellow mustard. To this end, yellow mustard is known to stain easily, and hard to remove. However, the chemical resistance of the Example 2 sample is sufficient enough that there was only light tint of yellowness left on the surface. The yellow pigment in the mustard is turmeric, which is unstable under the sunlight. After only one day of exposure to the sunlight, the light tint also went away and not able to be detected by eyes. In the absence of sufficient chemical resistance, the yellow pigment would be allowed to penetrate too deep, thereby leading to permanent staining.

    [0214] Next, the white colorabilty of inventive formulations were evaluated against the comparative formulations. Table 6 below shows the list of white colorability of inventive formulations compared with conventional, glass-filled specialty nylon and PEEK formulations. As an example, samples containing E-glass have the similar capability of white colorability as the samples containing similar content of S-glass.
    Table 6.
    No.Test DetailUnitExample 1Example 2Example 3AExample 4PARA/GlassPEEK/Glass
    1 Glass content wt% 20% 30% 45% 55% 30-50% 30%
    2 L* -- 95 93 91 85 N/A N/A


    [0215] The microstructure and microphase separation of a representative formulation, Example 1, was assessed by transmission electron microscopy in the absence (see Figure 2) and presence (see Figure 3) of 22 wt% glass fiber. Figure 4 shows representative micrographs obtained by transmission electron microscopy (TEM). The micrographs were obtained from a molded sample prepared using formulation Example 1 without glass fiber. (Panel A) magnification at 2,000x; (Panel B) magnification at 5,000x; (Panel C) magnification at 10,000x; (Panel D) magnification at 25,000x; and (Panel E) shows annotation as indicated to the same sample as shown in Panel D. Figure 3 shows representative micrographs obtained by transmission electron microscopy ("TEM"). The micrographs were obtained from a molded sample prepared using formulation Example 1 with 22 wt% glass fiber. (Panel A) magnification at 2,000x, and it should be noted that the large circles edged with very dark marked indicated with "GF" represent cross section of glass fiber; (Panel B) magnification at 5,000x, and it should be noted that the large circles edged with very dark marked indicated with "GF" represent cross section of glass fiber; (Panel C) magnification at 10,000x; (Panel D) magnification at 25,000x; and (Panel E) shows annotation as indicated to the same sample as shown in Panel D. The data show microphase separation at the nanoscale in formulations either with or without glass fiber. For example, with reference to Figures 2d and 2e, the image shows a dispersed polycarbonate phase (deep grey dots) of 50 nm diameter in a continuous semicrystalline polybutylene terephthalate phase. The image also shows light grey spheres comprising IM2 wrapped by IM3 distributed in the continuous semicrystalline polybutylene terephthalate phase. The spheres comprising IM2 wrapped by IM3 can be spherical or plate shaped, depending upon specific processing conditions. Similar results were obtained in the presence of glass fiber (see Figure 3d and 3e).

    [0216] Without wishing to be bound by a particular theory, the foregoing results are consistent with the following: the presence of a functionalized reactive elastomeric compatibilizer, IM3, reacts with the non-reactive elastomeric modifier, IM2, and the IM2/IM3 material is dispersed within the continuous PBT matrix with resultant good interfacial adhesion and robust mechanical properties. In contrast, without wishing to be bound by a particular theory, this result is in contrast to a formulation without an IM3, wherein a non-reactive elastomer can be distributed within a continuous polyester matrix such as PBT with resultant low interfacial adhesion and poor mechanical properties.

    [0217] The dielectric properties of representative disclosed blended thermoplastic compositions were also determined (see Figures 4 and 5). Dielectric constants (Dk) and dissipation factors (Df) were determined at the specified frequencies according to internal SABIC protocols such as using split post dielectric resonators methods known to one skilled in the art. The data show robust relative permittivity performance over a broad range of frequencies tested (see Figure 6), with the representative formulations all have a Dk significantly lower than 4.00, and two representative formulations with a Dk of 3.2. In contrast, Dk typically seen for PEEK with 30 wt% glass fiber is 3.7 at 1 MHz; for PPA with 30 wt% glass fiber, the Dk is 4.2 at 1 gigahertz (GHz); and for PAA with 30 wt% glass fiber, the Dk is 4.6 at 110 Hz. The dissipation factor (Df) shows similar robust performance over the frequency range tested. The formulation identifiers in Figures 6 and 7 correspond to those described herein above. The formulation "USDA-0" is the USDA formulation without glass fiber.

    [0218] Table 7 below shows various E-glass filled formulations compared with an S-glass filled formulation. Based on the epoxy functional group per gram, the amount of ERL-4221 can be converted from DER661 based on known calculations to achieve the same epoxy functional groups in the compounds.



    [0219] Table 8 below shows physical properties of various E-glass filled formulations (of Table 6) compared with an S-glass filled formulations.



    [0220] As show in Table 8, as compared to Example 5 and Example 3B, the samples with the comparable E-glass content have: higher melt flow index at 285°C; lower stiffness (tensile and flexural modulus); lower strength (tensile and flexural strength); and lower impact resistance (notched Izod impact sterngth and unnotched izod impact strength).

    [0221] Figure 6 shows SEM images of S10-2 and -3. Both images demonstrate excellent glass adhesion from E-glass in the blends, similar to the samples containing S-glass.

    [0222] Table 9 shows the mechanical property retention after stress cracking resistance (ESCR), such as ASTM D1693, test at room temperature with one day exposure in several strong oxidizing acids. The ASTM tensile bars were applied under both 0% and 0.5% strain after exposure to the listed chemicals for 24 hour. Then the bars were tested under ASTM D638 to measure tensile modulus of elasticity, tensile strength at break and tensile elongation at break. The retention was calculated in Table 9 by compared the tested data with the date from the control ASTM tensile bars without applying a chemical. Both samples containing E-glass and S-glass showed excellent retention (in the range of +/- 10% difference).
    Table 9
    ChemicalRetentionUnitExample 5Example 3BS10-1S10-2S10-3S10-4
    Acetic acid @ 0% strain Tensile Modulus of Elasticity % 99 100 100 100 100 99
    Tensile Strength at Break % 99 100 103 101 96 101
    Tensile Elongation at Break % 99 100 100 100 97 105
    Acetic acid @ 0.5% strain Tensile Modulus of Elasticity % 100 100 101 100 99 97
    Tensile Strength at Break % 98 100 101 101 98 96
    Tensile Elongation at Break % 100 102 100 98 96 104
    Up to 40% nitric acid @ 0% strain Tensile Modulus of Elasticity % 100 100 101 101 100 98
    Tensile Strength at Break % 100 101 103 102 98 99
    Tensile Elongation at Break % 100 101 100 99 98 103
    Up to 40% nitric acid @ 0.5% strain Tensile Modulus of Elasticity % 100 98 101 99 99 97
    Tensile Strength at Break % 99 101 100 99 98 100
    Tensile Elongation at Break % 97 104 100 100 100 105
    Up to 75% sulfuric acid @ 0% strain Tensile Modulus of Elasticity % 99 100 100 100 100 100
    Tensile Strength at Break % 99 99 103 102 99 99
    Tensile Elongation at Break % 96 101 101 99 100 102
    Up to 75% sulfuric acid @ 0.5% strain Tensile Modulus of Elasticity % 100 99 100 100 98 97
    Tensile Strength at Break % 99 101 103 101 98 97
    Tensile Elongation at Break % 95 102 100 99 96 99


    [0223] Figures 7 and 8 shows the dielectric properties of representative disclosed blended thermoplastic compositions. Dielectric constants (Dk) and dissipation factors (Df) were determined at the specified frequencies according to SABIC protocols such as split post dielectric resonators methods. Fore example, the test method can be configured to determine the complex permittivity of laminar dielectric materials utilizing network analyser with split post dielectric resonators. Permittivity and dissipation at frequency of 1.1/1.9/5/10/20GHz were measured. The more glass content, the higher Dk. S10-3 has higher Dk, compared with Example 2, which also contains 45% but S-glass. It is suggested S-glass might provide slightly lower Dk in the blends.

    [0224] Table 10 shows the comparison of E-glass in PBT/PC resins with S-glass in PBT/PC resins, wherein"+"indicates higher or better,"-" indicates lower or worse, and "O" indicates similar).
    Table 10
     E-GF in compoundS-GF in compound
    Flow + -
    Impact - +
    Strength - +
    Elongation - +
    Crystallinity O O
    Colorability O O
    UV O O
    ESCR O O
    Dielectric constant - +


    [0225] As the data suggest, the inventive formulations exhibit the ideal combination of white colorability, mechanical properties and chemical resistance. Indeed, the data suggests that the inventive formulations are the only white colorable, ultra stiff, high impact strength solution that is also chemically resistant to strong acids and cosmetic chemicals. Chemically resistant, as used herein, can mean resitant to oxidizing acids at high concentrations.


    Claims

    1. A blended thermoplastic composition comprising:

    a) from 5 wt% to 25 wt% of a polycarbonate component;

    b) from 20 wt% to 50 wt% of a polybutylene terephthalate component;

    c) from greater than 0 wt% to 5 wt% of a compatibilizer such as polyester ether elastomer component;

    d) from greater than 0 wt% to 5 wt% of an impact modifier such as poly(ethylene-co-ethylacrylate) component;

    e) from greater than 0 wt% to 3 wt% of a compatibilizer such as ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component; and

    f) from greater than 0 wt% to 60 wt% of a glass fiber component;

    wherein the wt% ratio of the polycarbonate component to polybutylene terephthalate component is less than or equal to 0.5;
    wherein the blended thermoplastic composition is chemically resistant;
    wherein the combined weight percent value of all components does not exceed 100 wt%; and
    wherein all weight percent values are based on the total weight of the composition.
     
    2. The blended thermoplastic composition of claim 1, wherein a molded sample of the blended thermoplastic composition has notched Izod impact strength greater than or equal to 140 J/m when determined in accordance with ASTM D256; and
    wherein a molded sample of the blended thermoplastic composition has a dielectric constant less than or equal to 4.0 when determined with ASTM D2520.
     
    3. The composition of any of claims 1-2, wherein the polycarbonate component is a homopolymer comprising repeating units derived from bisphenol A or a copolymer comprising repeating units derived from bisphenol A, sebacic acid, or both bisphenol A and sebacic acid.
     
    4. The composition of claim 1, comprising : a) from 6 wt% to 13 wt% of a polycarbonate component; (b) from 25 wt% to 45 wt% of a polybutylene terephthalate component; (c) from greater than 1.7 wt% to 3.2 wt% of a polyester ether elastomer component; (d) from greater than 1.3 wt% to 3.1 wt% of an poly(ethylene-co-ethylacrylate) component; (e) from greater than 0.7 wt% to 1.6 wt% of an ethylene/alkyl acrylate/glycidyl methacrylate terpolymer component; and (f) from greater than 25 wt% to 45 wt% of a glass fiber component; wherein the wt% ratio of the polycarbonate component to polybutylene terephthalate component is less than or equal to 0.5; wherein the combined weight percent value of all components does not exceed 100 wt%; wherein all weight percent values are based on the total weight of the composition; wherein a molded sample of the blended thermoplastic composition has notched Izod impact strength greater than or equal to 140 J/m when determined in accordance with ASTM D256; and wherein a molded sample of the blended thermoplastic composition has a dielectric constant less than or equal to 4.0 when determined in accordance with ASTM D2520.
     
    5. The composition of any of claims 1-4, wherein the glass fiber is selected from an E-glass, an S-glass, and a combination thereof
     
    6. The composition of any of claims 1-5, wherein the glass fiber has a length from 0.2 mm to 20 mm, wherein the glass fiber has a diameter from 1 µm to 35 µm.
     
    7. The composition of any of claims 1-6, further comprising from greater than 0 wt% to 1 wt% of a transesterification quenching agent selected from an acidic phosphate salt, a Group IB phosphate salt, a Group IIB phosphate salt, a phosphorus oxo-acid, and mixtures thereof.
     
    8. The composition of any of claims 1-7, further comprising an epoxy hydrostablizer agent, wherein the epoxy hydrostabilizer agent is an oligomeric epoxide.
     
    9. The composition of any of claims 1-8, wherein a molded sample of the blended thermoplastic composition has notched Izod impact strength greater than or equal to 150 J/m when determined in accordance with ASTM D256.
     
    10. The composition of any of claims 1-9, wherein a molded sample of the blended thermoplastic composition has a dielectric constant less than or equal to 3.8 when determined in accordance with ASTM D2520.
     
    11. An article comprising a composition of any of claims 1-10.
     
    12. A method of improving the impact strength and dielectric constant of a blended thermoplastic composition, the method comprising the step of combining:

    a) from 5 wt% to 25 wt% of a polycarbonate component;

    b) from 20 wt% to 50 wt% of a polybutylene terephthalate component;

    c) from greater than 0 wt% to 5 wt% of a compatibilizer such as polyester ether elastomer component;

    d) from greater than 0 wt% to 5 wt% of an impact modifier such as poly(ethylene-co-ethylacrylate) component;

    e) from greater than 0 wt% to 3 wt% of a compatibilizer such as ethylene/alkyl acrylate/glycidyl methacrylate terpolymer te component; and

    f) from greater than 0 wt% to 60 wt% of a glass fiber component;

    wherein the wt% ratio of the polycarbonate component to polybutylene terephthalate component is less than or equal to 0.5;
    wherein the combined weight percent value of all components does not exceed 100 wt%; and wherein all weight percent values are based on the total weight of the composition.
     


    Ansprüche

    1. Gemischte thermoplastische Zusammensetzung, umfassend:

    a) 5 Gew.-% bis 25 Gew.-% einer Polycarbonat-Komponente;

    b) 20 Gew.-% bis 50 Gew.-% einer Polybutylenterephthalat-Komponente;

    c) mehr als 0 Gew.-% bis 5 Gew.-% eines Verträglichmachers wie etwa einer Polyester-Ether-Elastomer-Komponente;

    d) mehr als 0 Gew.-% bis 5 Gew.-% eines Schlagzähmodifizierers wie etwa einer Poly(ethylen-co-ethylacrylat)-Komponente;

    e) mehr als 0 Gew.-% bis 3 Gew.-% eines Verträglichmachers wie etwa einer Ethylen-/Alkylacrylat-/Glycidylmethacrylat-Terpolymer-Komponente; und

    f) mehr als 0 Gew.-% bis 60 Gew.-% einer Glasfaserkomponente;

    wobei das Gew.-%-Verhältnis der Polycarbonat-Komponente zur Polybutylenterephthalat-Komponente kleiner als oder gleich 0,5 ist;
    wobei die gemischte thermoplastische Zusammensetzung chemisch beständig ist;
    wobei der kombinierte Gewichtsprozentwert aller Komponenten 100 Gew.-% nicht übersteigt; und
    wobei alle Gewichtsprozentwerte auf dem Gesamtgewicht der Zusammensetzung basieren.
     
    2. Gemischte thermoplastische Zusammensetzung nach Anspruch 1, wobei eine geformte Probe der gemischten thermoplastischen Zusammensetzung eine Izod-Kerbschlagzähigkeit von größer als oder gleich 140 J/m aufweist, wenn gemäß ASTM D256 bestimmt wird; und
    wobei eine geformte Probe der gemischten thermoplastischen Zusammensetzung eine Dielektrizitätskonstante von kleiner als oder gleich 4,0 aufweist, wenn gemäß ASTM D2520 bestimmt wird.
     
    3. Zusammensetzung nach einem der Ansprüche 1-2, wobei es sich bei der Polycarbonat-Komponente um ein Homopolymer handelt, das sich wiederholende Einheiten umfasst, die von Bisphenol A abgeleitet sind, oder um ein Copolymer, das sich wiederholende Einheiten umfasst, die von Bisphenol A, Sebacinsäure, oder sowohl Bisphenol A als auch Sebacinsäure abgeleitet sind.
     
    4. Zusammensetzung nach Anspruch 1, umfassend: a) 6 Gew.-% bis 13 Gew.-% einer Polycarbonat-Komponente; (b) 25 Gew.-% bis 45 Gew.-% einer Polybutylenterephthalat-Komponente; (c) mehr als 1,7 Gew.-% bis 3,2 Gew.-% einer Polyester-Ether-Elastomer-Komponente; (d) mehr als 1,3 Gew.-% bis 3,1 Gew.-% einer Poly(ethylen-co-ethylacrylat)-Komponente; (e) mehr als 0,7 Gew.-% bis 1,6 Gew.-% einer Ethylen-/Alkylacrylat-/Glycidylmethacrylat-Terpolymer-Komponente; und (f) mehr als 25 Gew.-% bis 45 Gew.-% einer Glasfaserkomponente; wobei das Gew.-%-Verhältnis der Polycarbonat-Komponente zur Polybutylenterephthalat-Komponente kleiner als oder gleich 0,5 ist; wobei der kombinierte Gewichtsprozentwert aller Komponenten 100 Gew.-% nicht übersteigt; wobei alle Gewichtsprozentwerte auf dem Gesamtgewicht der Zusammensetzung basieren; wobei eine geformte Probe der gemischten thermoplastischen Zusammensetzung eine Izod-Kerbschlagzähigkeit von größer als oder gleich 140 J/m aufweist, wenn gemäß ASTM D256 bestimmt wird; und wobei eine geformte Probe der gemischten thermoplastischen Zusammensetzung eine Dielektrizitätskonstante von kleiner als oder gleich 4,0 aufweist, wenn gemäß ASTM D2520 bestimmt wird.
     
    5. Zusammensetzung nach einem der Ansprüche 1-4, wobei die Glasfaser ausgewählt ist aus einem E-Glas, einem S-Glas, und einer Kombination davon.
     
    6. Zusammensetzung nach einem der Ansprüche 1-5, wobei die Glasfaser eine Länge von 0,2 mm bis 20 mm aufweist, wobei die Glasfaser einen Durchmesser von 1 µm bis 35 µm aufweist.
     
    7. Zusammensetzung nach einem der Ansprüche 1-6, weiter mehr als 0 Gew.-% bis 1 Gew.-% eines Umesterungs-Quenchmittels umfassend, ausgewählt aus einem sauren Phosphatsalz, einem Phosphatsalz der Gruppe IB, einem Phosphatsalz der Gruppe IIB, einer phosphorhaltigen Oxosäure und Mischungen davon.
     
    8. Zusammensetzung nach einem der Ansprüche 1-7, weiter ein Epoxid-Hydrostabilisierungsmittel umfassend, wobei es sich bei dem Epoxid-Hydrostabilisierungsmittel um ein oligomeres Epoxid handelt.
     
    9. Zusammensetzung nach einem der Ansprüche 1-8, wobei eine geformte Probe der gemischten thermoplastischen Zusammensetzung eine Izod-Kerbschlagzähigkeit von größer als oder gleich 150 J/m aufweist, wenn gemäß ASTM D256 bestimmt wird.
     
    10. Zusammensetzung nach einem der Ansprüche 1-9, wobei eine geformte Probe der gemischten thermoplastischen Zusammensetzung eine Dielektrizitätskonstante von kleiner als oder gleich 3,8 aufweist, wenn gemäß ASTM D2520 bestimmt wird.
     
    11. Erzeugnis, das eine Zusammensetzung nach einem der Ansprüche 1-10 umfasst.
     
    12. Verfahren zum Verbessern der Schlagzähigkeit und Dielektrizitätskonstante einer gemischten thermoplastischen Zusammensetzung, wobei das Verfahren den Schritt umfasst des Kombinierens von:

    a) 5 Gew.-% bis 25 Gew.-% einer Polycarbonat-Komponente;

    b) 20 Gew.-% bis 50 Gew.-% einer Polybutylenterephthalat-Komponente;

    c) mehr als 0 Gew.-% bis 5 Gew.-% eines Verträglichmachers wie etwa einer Polyester-Ether-Elastomer-Komponente;

    d) mehr als 0 Gew.-% bis 5 Gew.-% eines Schlagzähmodifizierers wie etwa einer Poly(ethylen-co-ethylacrylat)-Komponente;

    e) mehr als 0 Gew.-% bis 3 Gew.-% eines Verträglichmachers wie etwa einer Ethylen-/Alkylacrylat-/Glycidylmethacrylat-Terpolymer-Komponente; und

    f) mehr als 0 Gew.-% bis 60 Gew.-% einer Glasfaserkomponente;

    wobei das Gew.-%-Verhältnis der Polycarbonat-Komponente zur Polybutylenterephthalat-Komponente kleiner als oder gleich 0,5 ist;
    wobei der kombinierte Gewichtsprozentwert aller Komponenten 100 Gew.-% nicht übersteigt; und wobei alle Gewichtsprozentwerte auf dem Gesamtgewicht der Zusammensetzung basieren.
     


    Revendications

    1. Composition thermoplastique mélangée comprenant :

    a) 5% en poids à 25% en poids d'un composant polycarbonate ;

    b) 20% en poids à 50% en poids d'un composant polybutylène téréphtalate ;

    c) plus de 0% en poids à 5% en poids d'un agent de compatibilité tel qu'un composant élastomère polyester éther ;

    d) plus de 0% en poids à 5% en poids d'un agent antichoc tel qu'un composant poly(éthylène-co-éthylacrylate) ;

    e) plus de 0% en poids à 3% en poids d'un agent de compatibilité tel qu'un composant terpolymère d'éthylène/acrylate d'alkyle/méthacrylate de glycidyle ; et

    f) plus de 0% en poids à 60% en poids d'un composant fibre de verre ;

    dans laquelle le rapport en % en poids du composant polycarbonate sur le composant polybutylène téréphtalate est inférieur ou égal à 0,5 ;
    dans laquelle la composition thermoplastique mélangée est chimiquement résistante ;
    dans laquelle la valeur en pourcentage en poids combinée de tous les composants ne dépasse pas 100% en poids ; et
    dans laquelle toutes les valeurs en pourcentage en poids sont basées sur le poids total de la composition.
     
    2. Composition thermoplastique mélangée de la revendication 1, dans laquelle un échantillon moulé de la composition thermoplastique mélangée a une résistance au choc Izod sur barreau entaillé supérieure ou égale à 140 J/m lorsqu'elle est déterminée conformément à la norme ASTM D256 ; et
    dans laquelle un échantillon moulé de la composition thermoplastique mélangée a une constante diélectrique inférieure ou égale à 4,0 lorsqu'elle est déterminée conformément à la norme ASTM D2520.
     
    3. Composition de l'une des revendications 1 et 2, dans laquelle le composant polycarbonate est un homopolymère comprenant des unités répétitives dérivées du bisphénol A, ou un copolymère comprenant des unités répétitives dérivées du bisphénol A, de l'acide sébacique, ou du bisphénol A et de l'acide sébacique.
     
    4. Composition de la revendication 1, comprenant : a) 6% en poids à 13% en poids d'un composant polycarbonate ; (b) 25% en poids à 45% en poids d'un composant polybutylène téréphtalate ; (c) plus de 1,7% en poids à 3,2% en poids d'un composant élastomère polyester éther ; (d) plus de 1,3% en poids à 3,1% en poids d'un composant poly(éthylène-co-éthylacrylate) ; (e) plus de 0,7% en poids à 1,6% en poids d'un composant terpolymère d'éthylène/acrylate d'alkyle/méthacrylate de glycidyle ; et (f) plus de 25% en poids à 45% en poids d'un composant fibre de verre ; où le rapport en % en poids du composant polycarbonate sur le composant polybutylène téréphtalate est inférieur ou égal à 0,5 ; où la valeur en pourcentage en poids combinée de tous les composants ne dépasse pas 100% en poids ; où toutes les valeurs en pourcentage en poids sont basées sur le poids total de la composition ; où un échantillon moulé de la composition thermoplastique mélangée a une résistance au choc Izod sur barreau entaillé supérieure ou égale à 140 J/m lorsqu'elle est déterminée conformément à la norme ASTM D256 ; et où un échantillon moulé de la composition thermoplastique mélangée a une constante diélectrique inférieure ou égale à 4,0 lorsqu'elle est déterminée conformément à la norme ASTM D2520.
     
    5. Composition de l'une des revendications 1 à 4, dans laquelle la fibre de verre est choisie parmi le verre E, le verre S et une combinaison de ceux-ci.
     
    6. Composition de l'une des revendications 1 à 5, dans laquelle la fibre de verre a une longueur allant de 0,2 mm à 20 mm, dans laquelle la fibre de verre a un diamètre allant de 1 µm à 35 µm.
     
    7. Composition de l'une des revendications 1 à 6, comprenant en outre plus de 0% en poids à 1% en poids d'un agent d'extinction de transestérification choisi parmi un sel de phosphate acide, un sel de phosphate du groupe IB, un sel de phosphate du groupe IIB, un oxo-acide de phosphore et des mélanges de ceux-ci.
     
    8. Composition de l'une des revendications 1 à 7, comprenant en outre un agent d'hydrostabilisation époxy, où l'agent d'hydrostabilisation époxy est un époxyde oligomère.
     
    9. Composition de l'une des revendications 1 à 8, dans laquelle un échantillon moulé de la composition thermoplastique mélangée a une résistance au choc Izod sur barreau entaillé supérieure ou égale à 150 J/m lorsqu'elle est déterminée conformément à la norme ASTM D256.
     
    10. Composition de l'une des revendications 1 à 9, dans laquelle un échantillon moulé de la composition thermoplastique mélangée a une constante diélectrique inférieure ou égale à 3,8 lorsqu'elle est déterminée conformément à la norme ASTM D2520.
     
    11. Article comprenant une composition de l'une des revendications 1 à 10.
     
    12. Procédé d'amélioration de la résistance au choc et de la constante diélectrique d'une composition thermoplastique mélangée, le procédé comprenant l'étape consistant à combiner :

    a) 5% en poids à 25% en poids d'un composant polycarbonate ;

    b) 20% en poids à 50% en poids d'un composant polybutylène téréphtalate ;

    c) plus de 0% en poids à 5% en poids d'un agent de compatibilité tel qu'un composant élastomère polyester éther ;

    d) plus de 0% en poids à 5% en poids d'un agent antichoc tel qu'un composant poly(éthylène-co-éthylacrylate) ;

    e) plus de 0% en poids à 3% en poids d'un agent de compatibilité tel qu'un composant terpolymère d'éthylène/acrylate d'alkyle/méthacrylate de glycidyle ; et

    f) plus de 0% en poids à 60% en poids d'un composant fibre de verre ;

    dans lequel le rapport en % en poids du composant polycarbonate sur le composant polybutylène téréphtalate est inférieur ou égal à 0,5 ;
    dans lequel la valeur en pourcentage en poids combinée de tous les composants ne dépasse pas 100% en poids ; et dans lequel toutes les valeurs en pourcentage en poids sont basées sur le poids total de la composition.
     




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    REFERENCES CITED IN THE DESCRIPTION



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