The present invention provides an alkoxylated polyethylene imine polymer and surfactant formulation for use in domestic laundry.
Domestic Laundry liquid formulation containing Linear Alkyl benzene sulfonate surfactant, Alkyl Ether Sulfate surfactant, and low levels of non-ionic surfactant and zwitterionic surfactant are ubiquitous. To enhance cleaning performance alkoxylated polyethylene imine polymers, preferably in combination with polyethylene terephthalate soil removal polymers. The addition of these polymers greatly reduces the viscosity of the formulation. Effective methods to increase the viscosity of the formulation are required, which do not reduce the surfactant level.
Surprisingly it is found that partial or complete replacement of the alkyl ether sulfate anionic surfactant with alkyl ether carboxylic acid anionic surfactant, increases the viscosity of the formulation.
In one aspect the present invention provides an aqueous liquid laundry detergent composition comprising:
- (i) from 2 to 10 wt%, preferably from 2.5 to 5 wt%, of linear alkyl benzene anionic sulfonate surfactant;
- (ii) from 0.5 to 4 wt%, preferably 1.5 to 2.5 wt%, of zwitterionic surfactant selected from: amine oxide; and, carbobetaines;
- (iii) from 0.1 to 4 wt%, preferably 0.5 to 2 wt%, of an alkali metal salt, preferably NaCl;
- (iv) from 1 to 5 wt%, preferably 1.5 to 4 wt%, of an alkoxylated polyethylene imine, preferably ethoxylated polyethylene imine;
- (v) from 1 to 10 wt%, preferably 2 to 6 wt%, most preferably 3 to 5 wt%, of an alkyl ether carboxylic acid anionic surfactant of the following structure:
R2-(OCH2CH2)n-OCH2-COOH,
wherein:
R2 is selected from saturated and mono-unsaturated C10 to C26 linear or branched alkyl chains, preferably a C12 to C20 linear alkyl chains, most preferably a C16 to C18 linear alkyl chain, and wherein n is selected from: 6 to 20, preferably 7 to 13, more preferably 8 to 12, most preferably 9.5 to 10.5; - (vi) from 0 to 10 wt%, preferably from 2.5 to 5 wt%, of alkyl ether sulfate anionic surfactant with 0.5 to 1.5 mole equivalent of ethoxylation, preferably 0.9 to 1.2;
- (vii) from 0 to 2 wt%, preferably 0.2 to 1wt% of a terephthalate polyester soil release polymer;
- (viii) from 0 to 4 wt%, preferably from 0 to 1wt%, of a non-ionic surfactant; and
- (ix) from 0.0 to 0.2 wt%, preferably from 0.002 to 0.02 wt%, of a protease enzyme, wherein the laundry detergent composition comprises in total from 10 to 20 wt% of anionic surfactant.
In another aspect the present invention provides a domestic method of treating a textile, the method comprising the steps of:
- (i) treating a textile with from 1 g/L of an aqueous solution of the laundry detergent composition as defined in any one of the preceding claims; and,
- (ii) allowing said aqueous laundry detergent solution to remain in contact with the textile for 10 minutes to 2 days then rinsing and drying the textile.
In the method aspects of the present invention the surfactant used is preferably as preferred for the composition aspects of the present invention.
Domestic methods are preferably conducted in a domestic washing machine or by hand washing. The temperature of the wash is preferably from 285 to 313K. The main wash time is preferably 5 to 30 minutes.
The textile is preferably an item of clothing, bedding or table cloth. Preferred items of clothing are cotton containing shirts, trousers, underwear and jumpers.
Weights of Linear alkyl benzene sulfonate are calculated as the protonated form. The linear alkyl benzene sulfonate has an alkyl chain length of C8 to C15, preferably C12 to C14.
Linear alkyl benzene sulphonate (LAS) may be obtained, by sulphonating commercially available linear alkyl benzene (LAB); suitable LAB includes low 2-phenyl LAB, such as those supplied by Sasol under the tradename Isochem® or those supplied by Petresa under the tradename Petrelab®, other suitable LAB include high 2-phenyl LAB, such as those supplied by Sasol under the tradename Hyblene®. Another suitable route is alkyl benzene sulphonate that is obtained by DETAL catalyzed process, preferably having 8 to 15 carbon atoms. Other synthesis routes, such as HF, may also be suitable.
Weights of alkyl ether sulfate are calculated as the protonated form, R1-(OCH2CH2)m-OSO3H. Preferably R1 is C10 to C22 saturate or unsaturated linear alkyl chain, more preferably a saturated C12 to C16 linear alkyl chain, most preferably C12 linear alkyl chain (lauryl). The average number of moles of ethoxylation per mole of surfactant is m, m is preferably 0.5 to 1.5.
Weights of alkyl ether carboxylic acid are calculated as the protonated form, R2-(OCH2CH2)n-OCH2COOH. They may be used as salt version for example sodium salt, or amine salt.
The alkyl chain may be linear or branched, preferably it is linear.
The alkyl chain may be aliphatic or contain one cis or trans double bond.
The alkyl chain is preferably selected from CH3(CH2)15, CH3(CH2)17, CH3(CH2)7CH=CH(CH2)8-.
The alkyl ether carboxylic acid is most preferably of the structure:
CH3(CH2)7CH=CH(CH2)8(OCH2CH2)10OCH2COOH.
Alkyl ether carboxylic acid are available from Kao (Akypo®), Huntsman (Empicol®) and Clariant (Emulsogen®).
The zwitterionic surfactant contains a linear C8 to C16 aliphatic alkyl chain and a positive and negative charged atom within the surfactant molecule. The zwitterionic surfactants are betaines and amine oxides.
The amine oxide is preferably of the structure:
Preferably R3 is C12-C14, most preferably C12 (lauryl). Amine Oxides are available from Huntsman, for example, Empigen® OB.
The betaine is preferably a carbobetaine. The carbobetaine is preferably selected from the structures:
Preferably R4 is C12-C14, most preferably C12 (lauryl). Betaines are available from Huntsman, for example Empigen® BB. Cocoamidopropyl betaine (Cas-No 61789-40-0) is most preferred.
The zwitterionic is most preferably a carbobetaine.
The aqueous liquid laundry detergent may comprise Non-ionic surfactant, preferably an alkyl ethoxylated non-ionic surfactant.
Suitable nonionic detergent compounds which may be used include, in particular, the reaction products of compounds having an aliphatic hydrophobic group and a reactive hydrogen atom, for example, aliphatic alcohols, acids or amides, especially ethylene oxide either alone or with propylene oxide. The preferred nonionic detergent compounds are the condensation products of aliphatic C8 to C18 primary or secondary linear or branched alcohols with ethylene oxide.
Preferably the alkyl ethoxylated non-ionic surfactant is a C8 to C18 primary alcohol with a mole average ethoxylation of 7EO to 9EO units.
Preferably the fraction (weight% of non-ionic)/(weight% of anionic surfactant) is from 0 to 0.2, more preferably 0 to 0.05. Most preferably the formulation does not contain non-ionic.
The aqueous liquid laundry detergent may comprises from 0 to 4wt% of further surfactants, for example thos described in "
Examples of suitable further anionic detergent compounds are; alkyl sulphates, especially those obtained by sulphating linear or branched C8 to C18 alcohols; soaps; alkyl (preferably methyl) ester sulphonates, and mixtures thereof.
The alkoxylated polyethyelene imine comprises a polyethyleneimine backbone wherein the modification of the polyethyleneimine backbone is intended to leave the polymer without quaternisation. Such materials may be represented as PEI(X)YAO where X represents the molecular weight of the unmodified PEI and Y represents the average moles of alkoxylation (AO) per available NH in the unsubstituted polyethyleneimine backbone. Y is preferably from 7 to 40 more preferably it is in the range of 16 to 26, most preferably 18 to 22. X is selected to be from about 300 to about 10000 weight average molecular weight and is preferably about 600.
The alkoxylation is preferably selected from ethoxylation or propoxylation, or a combination of the two, Ethoxylation is most preferred. The alkoxy chains may be capped with groups selected from: H; CH3; SO3-; CH2COO-; PO32-; C2H5; n-propyl, i-propyl; n-butyl; t-butyl; and, sulfosuccinate, most preferably H.
Most preferably the alkoxylated PEI is PEI(600)20EO.
Terephthalate Polyester Soil Release Polymer comprise polymers of aromatic dicarboxylic acids and alkylene glycols (including polymers containing polyalkylene glycols), as described in
Examples of Terephthalate Polyester Soil Release Polymer are the REPEL-O-TEX® line of polymers supplied by Rhodia, including REPEL-O-TEX® SRP6 and REPEL-O-TEX® SF-2.
Other suitable soil release polymers include TexCare® polymers, including TexCare® SRA-100, TexCare® SRA-300, TexCare® SRN-100, TexCare® SRN-170, TexCare® SRN-240, TexCare® SRN-300, and TexCare® SRN-325, all supplied by Clariant.
Preferred structure are -[(Z)a-O-OC-Ar-CO-]b and (Z)a-O-OC-[Ar-CO-O-C3H6-O-OC]b-Ar-COO-(Z)a, where Ar is selected from 1,4 substituted phenylene and 1,3 substituted phenylene substituted in the 5 position with a sulphonates (SO3-) group; Z is selected from ethoxy;propoxy; and mixtures of ethoxy and propoxy; a is from 5 to 100 and b from 2 to 40. C3H6 is i-propyl.
The alkoxy chains are capped with groups selected from H; CH3; SO3-; CH2COO-; PO32-; C2H5; n-propyl, i-propyl; n-butyl; t-butyl; and, sulfosuccinate.
Most preferably the Terephthalate Polyester Soil Release Polymer is:
The composition may comprise one or more further polymers. Examples are carboxymethylcellulose, poly (ethylene glycol), poly(vinyl alcohol), polycarboxylates such as polyacrylates, maleic/acrylic acid copolymers and lauryl methacrylate/acrylic acid copolymers.
Polymers present to prevent dye deposition may be present, for example poly(vinylpyrrolidone), poly(vinylpyridine-N-oxide), and poly(vinylimidazole).
Such polymers are preferably present at levels of less then 0.5wt%.
The composition is preferably devoid of silicone polymers and polymers bearing quaternised N groups.
The detergent compositions may also optionally contain relatively low levels of organic detergent builder or sequestrant material. Examples include the alkali metal, citrates, succinates, malonates, carboxymethyl succinates, carboxylates, polycarboxylates and polyacetyl carboxylates. Specific examples include sodium, potassium and lithium salts of oxydisuccinic acid, mellitic acid, benzene polycarboxylic acids, ethylene diamine tetra-acetic acid, diethylenetriamine-pentaacetic acid, alkyl- or alkenylsuccinic acid, nitrilotriacetic acid, and citric acid. Other examples are DEQUEST™, organic phosphonate type sequestering agents sold by Monsanto and alkanehydroxy phosphonates.
Other suitable organic builders include the higher molecular weight polymers and copolymers known to have builder properties. For example, such materials include appropriate polyacrylic acid, polymaleic acid, and polyacrylic/polymaleic acid copolymers and their salts, such as those sold by BASF under the name SOKALAN™.
If utilised, the aqueous liquid laundry detergent formunation comprise from 0.1% to 2.0 wt% builder and sequesterant material. Citrate is most preferred.
Dyes are described in
Shading Dyes for use in laundry detergents preferably have an extinction coefficient at the maximum absorption in the visible range (400 to 700nm) of greater than 5000 L mol-1 cm-1, preferably greater than 10000 L mol-1 cm-1. The dyes are blue or violet in colour.
Preferred shading dye chromophores are azo, azine, anthraquinone, and triphenylmethane.
Preferred mono-azo dyes contain a heterocyclic ring and are most preferably thiophene dyes. The mono-azo dyes are preferably alkoxylated and are preferably uncharged or anionically charged at pH=7. Alkoxylated thiophene dyes are discussed in
Azine dye are preferably selected from sulphonated phenazine dyes and cationic phenazine dyes. Preferred examples are acid blue 98, acid violet 50, dye with
The shading dye may be present in the composition in range from 0.0001 to 0.5 wt %, preferably 0.001 to 0.1 wt%. Depending upon the nature of the shading dye there are preferred ranges depending upon the efficacy of the shading dye which is dependent on class and particular efficacy within any particular class. As stated above the shading dye is a blue or violet shading dye.
A mixture of shading dyes may be used.
The shading dye is most preferably a reactive blue anthraquinone dye covalently linked to an alkoxylated polyethyleneimine. The alkoxylation is preferably selected from ethoxylation and propoxylation, most preferably propoxylation. Preferably 80 to 95 mol% of the N-H groups in the polyethylene imine are replaced with iso-propyl alcohol groups by propoxylation. Preferably the polyethylene imine before reaction with the dye and the propoxylation has a molecular weight of 600 to 1800.
An example structure of a preferred reactive anthraquinone covalently attached to a propoxylated polyethylene imine is:
Preferred reactive anthraquinone dyes are: Reactive blue 1; Reactive blue 2; Reactive blue 4; Reactive blue 5; Reactive blue 6; Reactive blue 12; Reactive blue 16; reactive blue 19; Reactive blue 24 ; Reactive blue 27; Reactive blue 29; Reactive blue 36; Reactive blue 44; Reactive blue 46 ; Reactive blue 47; reactive blue 49; Reactive blue 50; Reactive blue 53; Reactive blue 55; Reactive blue 61; Reactive blue 66; Reactive blue 68; Reactive blue 69; Reactive blue 74; Reactive blue 86; Reactive blue 93; Reactive blue 94; Reactive blue101; Reactive blue103; Reactive blue114; Reactive blue117; Reactive blue125; Reactive blue141; Reactive blue142; Reactive blue 145; Reactive blue 149; Reactive blue 155; Reactive blue 164; Reactive blue 166; Reactive blue 177; Reactive blue 181; Reactive blue 185; Reactive blue 188; Reactive blue 189; Reactive blue 206; Reactive blue 208; Reactive blue 246; Reactive blue 247; Reactive blue 258; Reactive blue 261; Reactive blue 262; Reactive blue 263; and Reactive blue 172.
The dyes are listed according to Colour Index (Society of Dyers and Colourists/American Association of Textile Chemists and Colorists) classification.
Protease enzymes hydrolyse bonds within peptides and proteins, in the laundry context this leads to enhanced removal of protein or peptide containing stains. Examples of suitable proteases families include aspartic proteases; cysteine proteases; glutamic proteases; aspargine peptide lyase; serine proteases and threonine proteases. Such protease families are described in the MEROPS peptidase database (http://merops.sanger.ac.uk/). Serine proteases are preferred. Subtilase type serine proteases are more preferred. The term "subtilases" refers to a sub-group of serine protease according to
Examples of subtilases are those derived from Bacillus such as Bacillus lentus, B. alkalophilus, B. subtilis, B. amyloliquefaciens, Bacillus pumilus and Bacillus gibsonii described in;
Further Examples of useful proteases are the variants described in:
Most preferably the protease is a subtilisins (EC 3.4.21.62).
Examples of subtilases are those derived from Bacillus such as Bacillus lentus, B. alkalophilus, B. subtilis, B. amyloliquefaciens, Bacillus pumilus and Bacillus gibsonii described in;
Suitable commercially available protease enzymes include those sold under the trade names names Alcalase®, Blaze®; DuralaseTm, DurazymTm, Relase®, Relase® Ultra, Savinase®, Savinase® Ultra, Primase®, Polarzyme®, Kannase®, Liquanase®, Liquanase® Ultra, Ovozyme®, Coronase®, Coronase® Ultra, Neutrase®, Everlase® and Esperase® all could be sold as Ultra® or Evity® (Novozymes A/S).
Those sold under the tradename Maxatase®, Maxacal®, Maxapem®, Properase®, Purafect®, Purafect Prime®, Purafect Ox®, FN3®, FN4®, Excellase® and Purafect OXP® by Genencor International.
Those sold under the tradename Maxatase®, Maxacal®, Maxapem®, Purafect®, Purafect Prime®, PreferenzTm, Purafect MA®, Purafect Ox®, Purafect OxP®, Puramax®, Properase®, EffectenzTm, FN2®, FN3®, FN4®, Excellase®, Opticlean® and Optimase® (Danisco/DuPont), Axapem™ (Gist-Brocases N.V.),
Those available from Henkel/Kemira, namely BLAP (sequence shown in Figure 29 of
Inclusion of protease in the formulation enhances cleaning.
One or more further enzymes are preferred present in a laundry composition of the invention and when practicing a method of the invention.
Preferably the level of each enzyme in the laundry composition of the invention is from 0.0001 wt% to 0.1 wt% protein.
Preferably the further enzyme is selected from: alpha-amylases; lipases; and, cellulases.
Suitable lipases include those of bacterial or fungal origin. Chemically modified or protein engineered mutants are included. Examples of useful lipases include lipases from Humicola (synonym Thermomyces), e.g. from H. lanuginosa (T. lanuginosus) as described in
Other examples are lipase variants such as those described in
Preferred commercially available lipase enzymes include Lipolase™ and Lipolase Ultra™, Lipex™ and Lipoclean™ (Novozymes A/S).
The method of the invention may be carried out in the presence of phospholipase classified as EC 3.1.1.4 and/or EC 3.1.1.32. As used herein, the term phospholipase is an enzyme which has activity towards phospholipids.
Phospholipids, such as lecithin or phosphatidylcholine, consist of glycerol esterified with two fatty acids in an outer (sn-1) and the middle (sn-2) positions and esterified with phosphoric acid in the third position; the phosphoric acid, in turn, may be esterified to an amino-alcohol. Phospholipases are enzymes which participate in the hydrolysis of phospholipids. Several types of phospholipase activity can be distinguished, including phospholipases A1 and A2 which hydrolyze one fatty acyl group (in the sn-1 and sn-2 position, respectively) to form lysophospholipid; and lysophospholipase (or phospholipase B) which can hydrolyze the remaining fatty acyl group in lysophospholipid. Phospholipase C and phospholipase D (phosphodiesterases) release diacyl glycerol or phosphatidic acid respectively.
The method of the invention may be carried out in the presence of cutinase classified in EC 3.1.1.74. The cutinase used according to the invention may be of any origin. Preferably cutinases are of microbial origin, in particular of bacterial, of fungal or of yeast origin.
Suitable amylases (alpha and/or beta) include those of bacterial or fungal origin. Chemically modified or protein engineered mutants are included. Amylases include, for example, alpha-amylases obtained from Bacillus, e.g. a special strain of B. licheniformis, described in more detail in
Suitable cellulases include those of bacterial or fungal origin. Chemically modified or protein engineered mutants are included. Suitable cellulases include cellulases from the genera Bacillus, Pseudomonas, Humicola, Fusarium, Thielavia, Acremonium, e.g. the fungal cellulases produced from Humicola insolens, Thielavia terrestris, Myceliophthora thermophila, and Fusarium oxysporum disclosed in
Suitable peroxidases/oxidases include those of plant, bacterial or fungal origin. Chemically modified or protein engineered mutants are included. Examples of useful peroxidases include peroxidases from Coprinus, e.g. from C. cinereus, and variants thereof as those described in
Further enzymes suitable for use are discussed in
Any enzyme present in the composition may be stabilized using conventional stabilizing agents, e.g., a polyol such as propylene glycol or glycerol, a sugar or sugar alcohol, lactic acid, boric acid, or a boric acid derivative, e.g., an aromatic borate ester, or a phenyl boronic acid derivative such as 4-formylphenyl boronic acid, and the composition may be formulated as described in e.g.,
Where alkyl groups are sufficiently long to form branched or cyclic chains, the alkyl groups encompass branched, cyclic and linear alkyl chains. The alkyl groups are preferably linear or branched, most preferably linear.
The composition preferably comprises a fluorescent agent (optical brightener). Fluorescent agents are well known and many such fluorescent agents are available commercially. Usually, these fluorescent agents are supplied and used in the form of their alkali metal salts, for example, the sodium salts.
Preferred classes of fluorescer are: Di-styryl biphenyl compounds, e.g. Tinopal (Trade Mark) CBS-X, Di-amine stilbene di-sulphonic acid compounds, e.g. Tinopal DMS pure Xtra and Blankophor (Trade Mark) HRH, and Pyrazoline compounds, e.g. Blankophor SN.
Preferred fluorescers are: sodium 2 (4-styryl-3-sulphophenyl)-2H-napthol[1,2-d]triazole, disodium 4,4'-bis{[(4-anilino-6-(N methyl-N-2 hydroxyethyl) amino 1,3,5-triazin-2-yl)]amino}stilbene-2-2' disulophonate, disodium 4,4'-bis{[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)]amino} stilbene-2-2' disulphonate, and disodium 4,4'-bis(2-sulphostyryl)biphenyl.
The total amount of the fluorescent agent or agents used in the composition is preferably from 0.0001 to 0.5 wt %, more preferably 0.005 to 2 wt %, most preferably 0.05 to 0.25 wt %.
The aqueous solution used in the method has a fluorescer present. The fluorescer is present in the aqueous solution used in the method preferably in the range from 0.0001 g/l to 0.1 g/l, more preferably 0.001 to 0.02 g/l.
The composition may comprise a perfume. The perfume is preferably in the range from 0.001 to 3 wt %, more preferably 0.05 to 0.5 wt%, most preferably from 0.1 to 1 wt %. Many suitable examples of perfumes are provided in the CTFA (Cosmetic, Toiletry and Fragrance Association)
Preferably the perfume comprises at least one note (compound) from: alpha-isomethyl ionone, benzyl salicylate; citronellol; coumarin; hexyl cinnamal; linalool; Pentanoic acid, 2-methyl-, ethyl ester; octanal; benzyl acetate; 1,6-octadien-3-ol, 3,7-dimethyl-, 3-acetate; cyclohexanol, 2-(1,1-dimethylethyl)-, 1-acetate; delta-damascone; beta-ionone; verdyl acetate; dodecanal; hexyl cinnamic aldehyde; cyclopentadecanolide; benzeneacetic acid, 2-phenylethyl ester;amyl salicylate; beta-caryophyllene; ethyl undecylenate; geranyl anthranilate; alpha-irone; beta-phenyl ethyl benzoate; alpa-santalol; cedrol; cedryl acetate; cedry formate; cyclohexyl salicyate; gamma-dodecalactone; and, beta phenylethyl phenyl acetate.
Useful components of the perfume include materials of both natural and synthetic origin. They include single compounds and mixtures. Specific examples of such components may be found in the current literature, e.g., in
It is commonplace for a plurality of perfume components to be present in a formulation. In the compositions of the present invention it is envisaged that there will be four or more, preferably five or more, more preferably six or more or even seven or more different perfume components.
In perfume mixtures preferably 15 to 25 wt% are top notes. Top notes are defined by
The International Fragrance Association has published a list of fragrance ingredients (perfumes) in 2011. (http://www.ifraorg.org/en-us/ingredients#.U7Z4hPldWzk)
The Research Institute for Fragrance Materials provides a database of perfumes (fragrances) with safety information.
Perfume top note may be used to cue the whiteness and brightness benefit of the invention.
Some or all of the perfume may be encapsulated, typical perfume components which it is advantageous to encapsulate, include those with a relatively low boiling point, preferably those with a boiling point of less than 300, preferably 100-250 Celsius. It is also advantageous to encapsulate perfume components which have a low CLog P (ie. those which will have a greater tendency to be partitioned into water), preferably with a CLog P of less than 3.0. These materials, of relatively low boiling point and relatively low CLog P have been called the "delayed blooming" perfume ingredients and include one or more of the following materials: allyl caproate, amyl acetate, amyl propionate, anisic aldehyde, anisole, benzaldehyde, benzyl acetate, benzyl acetone, benzyl alcohol, benzyl formate, benzyl iso valerate, benzyl propionate, beta gamma hexenol, camphor gum, laevo-carvone, d-carvone, cinnamic alcohol, cinamyl formate, cis-jasmone, cis-3-hexenyl acetate, cuminic alcohol, cyclal c, dimethyl benzyl carbinol, dimethyl benzyl carbinol acetate, ethyl acetate, ethyl aceto acetate, ethyl amyl ketone, ethyl benzoate, ethyl butyrate, ethyl hexyl ketone, ethyl phenyl acetate, eucalyptol, eugenol, fenchyl acetate, flor acetate (tricyclo decenyl acetate), frutene (tricyclco decenyl propionate), geraniol, hexenol, hexenyl acetate, hexyl acetate, hexyl formate, hydratropic alcohol, hydroxycitronellal, indone, isoamyl alcohol, iso menthone, isopulegyl acetate, isoquinolone, ligustral, linalool, linalool oxide, linalyl formate, menthone, menthyl acetphenone, methyl amyl ketone, methyl anthranilate, methyl benzoate, methyl benyl acetate, methyl eugenol, methyl heptenone, methyl heptine carbonate, methyl heptyl ketone, methyl hexyl ketone, methyl phenyl carbinyl acetate, methyl salicylate, methyl-n-methyl anthranilate, nerol, octalactone, octyl alcohol, p-cresol, p-cresol methyl ether, p-methoxy acetophenone, p-methyl acetophenone, phenoxy ethanol, phenyl acetaldehyde, phenyl ethyl acetate, phenyl ethyl alcohol, phenyl ethyl dimethyl carbinol, prenyl acetate, propyl bornate, pulegone, rose oxide, safrole, 4-terpinenol, alpha-terpinenol, and /or viridine. It is commonplace for a plurality of perfume components to be present in a formulation. In the compositions of the present invention it is envisaged that there will be four or more, preferably five or more, more preferably six or more or even seven or more different perfume components from the list given of delayed blooming perfumes given above present in the perfume.
Another group of perfumes with which the present invention can be applied are the so-called 'aromatherapy' materials. These include many components also used in perfumery, including components of essential oils such as Clary Sage, Eucalyptus, Geranium, Lavender, Mace Extract, Neroli, Nutmeg, Spearmint, Sweet Violet Leaf and Valerian.
It is preferred that the laundry treatment composition does not contain a peroxygen bleach, e.g., sodium percarbonate, sodium perborate, and peracid.
The indefinite article "a" or "an" and its corresponding definite article "the" as used herein means at least one, or one or more, unless specified otherwise.
The following formulations were made with varying level of salt and SRP addition.
The EPEI (Ethoxylated PolyEthylene Imine) used was a PEI of 600 molecular weight with 20 moles of ethoxylate per NH on the base PEI; it is available as Sokalan HP20 ex BASF.
The SRP (Soil Removal Polymer) was used at a level of 0.0 wt% and 0.5 wt%. The SRP used was:
The SRP is as described in
The viscosity of the formulation were measured using a Paar Physica MCR300 is a commercial stress rheometer.
The results are presented in the table below for formulation in the absence of the SRP polymer (0.0 wt%).
The inventive formulation F1 and F2 containing the alkyl ether carboxylic acid have higher viscosity then the control with sodium lauryl ether sulfate alone.
The results are presented in the table below for formulation in the presence of the SRP polymer (0.5 wt%).
The inventive formulation F1 and F2 containing the alkyl ether carboxylic acid have higher viscosity then the control with sodium lauryl ether sulfate alone.