FIELD OF THE INVENTION
[0001] The present invention relates to the use of cationic celluloses to enhance deposition
of water insoluble fabric care benefit agents such as water insoluble silicone derivatives
during laundering.
BACKGROUND OF THE INVENTION
[0002] Laundering textiles is a necessity in order to remove stains, odors and soils. However,
during the laundering process, textiles can undergo mechanical and chemical damage
which can result in fabric wrinkles, color fading, dye transfer, pills/fuzz, fabric
wear, fiber deterioration, stiffness, and other undesirable consumer issues. Therefore,
many laundry products such as detergents, fabric conditioners, and other wash, rinse,
and dryer added products, frequently include one or more fabric care benefit agents
that are added in an attempt to reduce or prevent these consumer issues.
[0003] However, such fabric care benefit agents often provide limited benefits due to poor
delivery efficiency on the fabrics or textiles during the laundering process. The
affinity between these fabric care agents and fabrics/garments is typically very limited
due to the lack of natural attractive forces between the fabric care agents and the
fabrics. This is because most fabric care agents used in laundry products are formulated
to be anionic or nonionic in order to avoid interaction with anionic surfactants which
might lead to potential cleaning negatives. Since most textile fibers such as cotton,
wool, silk, nylon, and the like carry a slightly anionic charge in the laundry solution,
there are repulsive instead of attractive forces between the fabric care agent and
the fabric resulting in poor delivery efficiency.
[0004] This is particularly true of water insoluble fabric care benefit agents, examples
of which include but are not limited to, water insoluble silicone derivatives and
the like. Due to their water insolubility, water insoluble fabric care benefit agents
are generally incorporated into laundry product formulations in some type of water
stable form such as an emulsion, a latex, a dispersion, a suspension, or the like.
When added to the laundry product in a water stable form, the water insoluble fabric
care benefit agent becomes even more stable in solution. This is due to the existence
of large amounts of surfactant that are present in laundry products. The surfactant
in the laundry products tends to act as an emulsifying agent, dispersion agent, suspension
agent, or the like thereby resulting in the further stabilization of the emulsion,
dispersion, and/or suspension containing the water insoluble fabric care benefit agent.
As a result of this stabilization, the affinity of the water insoluble fabric care
benefit agent for the fabric is severely limited. The majority of the water insoluble
fabric care benefit agent tends to stay in solution wherein it is discarded with the
wash solution thereby limiting the amount of benefit agent available for deposition
on the fabric.
[0005] Accordingly, there is a need to improve the fabric delivery efficiency of water insoluble
fabric care benefit agents that are incorporated into laundry products.
SUMMARY OF THE INVENTION
[0006] The laundry products of the present invention comprise at least one water insoluble
fabric care benefit agent and at least one cationic cellulose delivery enhancing agent
or deposition aid.
[0007] Without being limited by theory, it is believed that the laundry products of the
present invention improve the fabric delivery efficiency of water insoluble fabric
care benefit agents that are incorporated therein by the inclusion of the cationic
cellulose delivery agents of the present invention. It has surprisingly been found
that by using cationic celluloses as delivery enhancing agents, the delivery of the
water insoluble fabric care benefit agent to the fabric is significantly enhanced,
which would not otherwise be possible.
[0008] Although the cationic celluloses may provide fabric care benefits by themselves,
an amount of the cationic celluloses needed to deliver significant performance benefits
is much larger than an amount of the cationic celluloses needed as a delivery enhancing
agent. However, large amounts of cationic celluloses often have a negative affect
on cleaning performance. The cleaning negative caused by the large amount of cationic
celluloses will normally prohibit their application in laundry detergent embodiments
as the benefit agents alone. Importantly however, it the level of the cationic cellulose
as the delivery enhancing agent, the impact on cleaning is normally very limited.
[0009] It has further been surprisingly discovered that the addition of the cationic celluloses
of the present invention into laundry products may provide significant improvement
in the delivery/deposition of the water insoluble fabric care benefit agent on the
fabric versus utilizing the water insoluble fabric care benefit agent alone. In fact,
it is surprising to find that when a laundry detergent containing cationic celluloses
and the fabric care benefit agent are added in the washer, delivery/deposition enhancements
of the water insoluble fabric care benefit agent on fabric of as much as 5 to 10 times
the normal amount of benefit agent alone are observed.
[0010] It is also surprising to find that the delivery/deposition enhancements may be accomplished
by mixing the cationic cellulose and the fabric care benefit agent together as a laundry
additive of a fabric care composite or by formulating these two ingredients into laundry
detergent or other laundry products.
[0011] The water insoluble benefit agents useful herein include water insoluble silicone
derivatives. The water insoluble fabric care benefit agent preferably has a particle
size of from about 1 nm to 100 um. The present invention also comprises a detergent
or fabric softener composition wherein the composition comprises:
- a. from about 1-80 wt% of an anionic, cationic, nonionic, amphoteric, zwitterionic
surfactant or a combination thereof;
- b. from about 0.1- 10 wt% of a water insoluble benefit agent wherein said water insoluble
fabric care benefit agent is a water insoluble silicone derivative, or a mixture thereof;
and
- c. from about 0.01- 2% of a cationic cellulose.
[0012] Preferably the ratio of the delivery enhancing agent to the fabric care benefit agent
is from about 1:50 to about 1:1.
DETAILED DESCRIPTION OF THE INVENTION
[0013] The present invention relates to the use of cationic celluloses to enhance deposition
of water insoluble fabric care benefit agents including water insoluble silicone derivatives
during laundering. Without being limited by theory, utilizing the cationic cellulose
delivery enhancing agents of the present invention allows for improved delivery of
the water insoluble fabric care benefit agent to the fabric so as to provide enhanced
fabric softening, color protection, pill/fuzz reduction, anti-abrasion, anti-wrinkle,
and other such benefits to garments and textiles.
[0014] The cationic cellulose, called the delivery enhancing agent, and the water insoluble
fabric care benefit agent of the present invention may be mixed together prior to
formulating in, adding to, or using in conjunction with a laundry product composition.
The two components may be formulated into laundry products separated with different
orders of addition. The two components of the present invention may also be mixed
together in situ after addition to the laundry product composition. Additionally,
the two components of the present invention may be applied directly to the fabric
together or separately.
[0015] By using the delivery enhancing agent of the present invention, the deposition of
the water insoluble fabric care benefit agent on the fabric is significantly improved
and in some instances doubled, (i.e.; utilizing the delivery enhancing agent of the
present invention may increase the deposition of the water insoluble fabric care benefit
agent on the fabric by potentially about 100% or more compared with using the water
insoluble fabric care benefit agent alone). Preferably deposition on the fabric will
increase by at least about 200%. Since the fabric care benefit is directly related
to the amount of deposition of the fabric care benefit agent on the fabric, the performance
of the water insoluble fabric care benefit agent on the fabric should theoretically
increase proportionately by potentially about 100% and preferably by at least about
200%.
[0016] The ratio of the delivery enhancing agent to the water insoluble fabric care benefit
agent should be from about 1:50 to 1:1 and preferably from about 1:20 to 1:2. The
two components of the present invention can be premixed to form a stable composite
prior to formulating into a laundry product or prior to adding to the laundry process
or applying to a fabric. The two components can also be formulated into laundry products
separately with different orders of addition. The two components may also be mixed
together so as to form the fabric care composite of the present invention in situ
after formulating into the laundry product or adding to the laundry process.
[0017] All percentages, ratios and proportions herein are on a weight basis unless otherwise
indicated. All documents cited herein are hereby incorporated by reference.
Delivery Enhancing Agents
[0018] As used herein, "delivery enhancing agent" refers to any cationic cellulose or combination
of cationic celluloses that significantly enhance the deposition of the water insoluble
fabric care benefit agent onto the fabric during laundering. The delivery enhancing
agent of the present invention has a strong physical binding capability with the water
insoluble fabric care benefit agent. It also has a very strong affinity to natural
textile fibers, such as cotton fibers.
[0019] An effective delivery enhancing agent preferably has a strong binding capability
with the water insoluble fabric care benefit agents via physical forces such as van
der Waals forces or non-covalent chemical bonds such as hydrogen bonding and/or ionic
bonding. It preferably has a very strong affinity to natural textile fibers, particularly
cotton fibers.
[0020] The delivery enhancing agent should be water soluble and have a flexible molecular
structure so that it can cover the water insoluble fabric care benefit agent particle
surface or hold several particles together. Therefore, the delivery enhancing agent
is preferably not cross-linked and preferably does not have a network structure as
these both tend to lack molecular flexibility.
[0021] In order to drive the fabric care benefit agent onto the fabric, the net charge of
the delivery enhancing agent is preferably positive in order to overcome the repulsion
between the fabric care benefit agent and the fabric since most fabrics are comprised
of textile fibers that have a slightly negative charge in aqueous environments. Examples
of fibers exhibiting a slightly negative charge in water include but are not limited
to cotton, rayon, silk, wool, etc.
[0022] Preferably, the delivery enhancing agent is a cationic or amphoteric polymer. The
amphoteric polymers of the present invention will also have a net cationic charge,
i.e.; the total cationic charges on these polymers will exceed the total anionic charge.
The degree of substitution of the cationic charge can be in the range of from about
0.01 (one cationic charge per 100 polymer repeating units) to 1.00 (one cationic charge
on every polymer repeating unit) and preferably from about 0.01 to 0.20. The positive
charges could be on the backbone of the polymers or the side chains of polymers.
[0023] While there are many ways to calculate the charge density of cationic celluloses,
the degree of substitution of the cationic charge can be simply calculated by the
cationic charges per 100 glucose repeating units. One cationic charge per 100 glucose
repeating units equals to 1% charge density of the cationic celluloses.
[0024] Preferred cationic celluloses for use herein include those which may or may not be
hydrophobically-modified, having a molecular weight of from about 50,000 to about
2,000,000, more preferably from about 100,000 to about 1,000,000, and most preferably
from about 200,000 to about 800,000. These cationic materials have repeating substituted
anhydroglucose units that correspond to the general Structural Formula I as follows:
Wherein R1, R2, R3 are each independently H, CH3, C8-24 alkyl (linear or branched),
or mixtures thereof; wherein n is from about 1 to about 10; Rx is H, CH3, C8-24 alkyl (linear or branched),
or mixtures thereof, wherein Z is a water soluble anion, preferably a chlorine ion
and/or a bromine ion; R5 is H, CH3, CH2CH3, or mixtures thereof; R7 is CH3, CH2CH3, a phenyl group, a C8-24 alkyl group (linear or branched), or mixture thereof; and
R8 and R9 are each independently CH3, CH2CH3, phenyl, or mixtures thereof:
R4 is H,
or mixtures thereof wherein P is a repeat unit of an addition polymer formed by radical
polymerization of a cationic monomer such as
wherein Z' is a water-soluble anion, preferably chlorine ion, bromine ion or mixtures
thereof and q is from about 1 to about 10.
[0025] Water-soluble anions useful herein include C8-C24 alkyl sulfates, C8-C24 alkyl alkoxy
sulfates, preferably alkyl ethoxy sulfates, C8-C24 alkyl sulfonates, C8-C16 alkyl
benzene sulfonates, xylene sulfonates, toluene sulfonates, cumene sulfonates, fatty
alkyl carboxylates, chlorine ions, bromine ions, or mixtures thereof, while chlorine
and/or bromine ions are preferred.
[0026] The charge density of the cationic celluloses herein (as defined by the number of
cationic charges per 100 glucose units) is preferably from about 0.5 % to about 60%,
more preferably from about 1% to about 20%, and most preferably from about 2% to about
10%.
[0027] Alkyl substitution on the anhydroglucose rings of the polymer ranges from about 0.01%
to 5% per glucose unit, more preferably from about 0.05% to 2% per glucose unit, of
the polymeric material.
[0028] The cationic cellulose may lightly cross-linked with a dialdehyde such as glyoxyl
to prevent forming lumps, nodules or other agglomerations when added to water at ambient
temperatures.
[0029] The cationic cellulose ethers of Structural Formula I likewise include those which
are commercially available and further include materials which can be prepared by
conventional chemical modification of commercially available materials. Commercially
available cellulose ethers of the Structural Formula I type include the JR 30M, JR
400, JR 125, LR 400 and LK 400 polymers, all of which are marketed by Dow Chemical.
Water Insoluble Fabric Care Benefit Agents
[0030] As used herein, "water insoluble fabric care benefit agent" refers to any silicone
derivatives that are water insoluble and can provide fabric care benefits such as
fabric softening, color protection, pill/fuzz reduction, anti-abrasion, anti-wrinkle,
and the like to garments and fabrics, particularly on cotton garments and fabrics,
when an adequate amount of the material is present on the garment/fabric. Non-limiting
examples of water insoluble fabric care benefit agents include water-insoluble silicone
derivatives and mixtures thereof.
Water Insoluble Silicone Derivatives
[0031] For the purposes of the present invention, water insoluble silicone derivatives are
any silicone materials which are not soluble in water, but can be prepared as emulsions,
latexes, dispersions, suspensions and the like with suitable surfactants before formulation
of the laundry products. Any neat silicones that can be directly emulsified or dispersed
into laundry products are also covered in the present invention since laundry products
typically contain a number of different surfactants that can behave like emulsifiers,
dispersing agents, suspension agents, etc. thereby aiding in the emulsification, dispersion,
and/or suspension of the water insoluble silicone derivative. By depositing on the
fabrics, these silicone derivatives can provide one or more fabric care benefit to
the fabric including anti-wrinkle, color protection, pill/fuzz reduction, anti-abrasion,
fabric softening and the like.
[0032] The water insoluble silicone derivatives of the present invention include, but are
not limited to 1) non-functionalized silicones such as polydimethylsiloxane (PDMS),
including linear, grafted and cyclic structures and 2) functionalized silicones or
copolymers with one or more different types of functional groups such as amino, alkoxy,
alkyl, phenyl, polyether, acrylate, siliconhydride, mercaptoproyl, carboxylic acid,
quatemized nitrogen, etc. In terms of silicone emulsions, the particle size can be
in the range from about 1 nm to 100 microns and preferably from about 10 nm to about
10 microns including microemulsions (<150 nm), standard emulsions (about 200 nm to
about 500 nm) and macroemulsions (about 1 micron to about 20 microns). Water soluble
silicone derivatives are outside of the scope of the present invention.
[0033] Non-limiting examples of commercially available water insoluble silicone derivatives
include SM2125 commercially available from GE Silicones,and DC8822 and DC 200 Fluid
both of which are commercially available from Dow Coming.
Laundry Products
[0034] A non-limiting list of optional components of the present invention includes laundry
detergents, fabric conditioners, and other wash, rinse, and dryer added products.
The laundry products may comprise from about 0.1% to about 20% of the water insoluble
fabric care benefit agent, preferably from about 0.2% to about 10%. The laundry products
may also comprise from about 0.01% to about 5% of the delivery enhancing agent, preferably
from about 0.02% to about 2%. Conventional components of fabric conditioners include
but are not limited to surfactants and the like. Conventional components of detergent
compositions include but are not limited to surfactants, bleaches and bleach activators,
enzymes and enzyme stabilizing agents, suds boosters or suds suppressers, anti-tarnish
and anticorrosion agents, non-builder alkalinity sources, chelating agents, organic
and inorganic fillers, solvents, hydrotropes, optical brighteners, dyes, perfumes,
and modified cellulose ether fabric treatment agents. The fabric care benefit agents
or delivery enhancing agent of the present invention may be a component of or added
to a detergent composition or a fabric conditioner. The detergent composition may
be in the form of a granule, liquid, or tablet. Detergent compositions of the present
invention may be made in accordance with
U.S. Patent Nos. 6,274,540 and
6,306,817 and WIPO Publication Nos.
WO 01/16237 published March 8, 2001 and
WO 01/16263 published on March 8, 2001.
I. Surfactant
[0035] The laundry products of the present invention may comprise from about 1% to 80% by
weight of a surfactant. Preferably such compositions comprise from about 5% to 50%
by weight of surfactant. Detersive surfactants utilized can be of the anionic, nonionic,
zwitterionic, ampholytic or cationic type or can comprise compatible mixtures of these
types. Detergent surfactants useful herein are described in
U.S. Patent 3,664,961, Norris, issued May 23, 1972,
U.S. Patent 3,919,678, Laughlin et al., issued December 30, 1975,
U.S. Patent 4,222,905, Cockrell, issued September 16, 1980, and in
U.S. Patent 4,239,659, Murphy, issued December 16, 1980. Anionic and nonionic surfactants are preferred.
[0036] Useful anionic surfactants can themselves be of several different types. For example,
water-soluble salts of the higher fatty acids, i.e., "soaps", are useful anionic surfactants
in the compositions herein. This includes alkali metal soaps such as the sodium, potassium,
ammonium, and alkylolammonium salts of higher fatty acids containing from about 8
to about 24 carbon atoms, and preferably from about 12 to about 18 carbon atoms. Soaps
can be made by direct saponification of fats and oils or by the neutralization of
free fatty acids. Particularly useful are the sodium and potassium salts of the mixtures
of fatty acids derived from coconut oil and tallow, i.e., sodium or potassium tallow
and coconut soap.
[0037] Additional non-soap anionic surfactants which are suitable for use herein include
the water-soluble salts, preferably the alkali metal, and ammonium salts, of organic
sulfuric reaction products having in their molecular structure an alkyl group containing
from about 10 to about 20 carbon atoms and a sulfonic acid or sulfuric acid ester
group. (Included in the term "alkyl" is the alkyl portion of acyl groups.) Examples
of this group of synthetic surfactants are a) the sodium, potassium and ammonium alkyl
sulfates, especially those obtained by sulfating the higher alcohols (C
8-C
18 carbon atoms) such as those produced by reducing the glycerides of tallow or coconut
oil; b) the sodium, potassium and ammonium alkyl polyethoxylate sulfates, particularly
those in which the alkyl group contains from 10 to 22, preferably from 12 to 18 carbon
atoms, and wherein the polyethoxylate chain contains from 1 to 15, preferably 1 to
6 ethoxylate moieties; and c) the sodium and potassium alkylbenzene sulfonates in
which the alkyl group contains from about 9 to about 15 carbon atoms, in straight
chain or branched chain configuration, e.g., those of the type described in
U.S. Patents 2,220,099 and
2,477,383. Especially valuable are linear straight chain alkylbenzene sulfonates in which the
average number of carbon atoms in the alkyl group is from about 11 to 13, abbreviated
as C
11-13 LAS.
[0038] Preferred nonionic surfactants are those of the formula R
1(OC
2H
4)
nOH, wherein R
1 is a C
10-C
16 alkyl group or a C
8-C
12 alkyl phenyl group, and n is from 3 to about 80. Particularly preferred are condensation
products of C
12-C
15 alcohols with from about 5 to about 20 moles of ethylene oxide per mole of alcohol,
e.g., C
12-C
13 alcohol condensed with about 6.5 moles of ethylene oxide per mole of alcohol.
[0039] Additional suitable nonionic surfactants include polyhydroxy fatty acid amides of
the formula:
wherein R is a C
9-17 alkyl or alkenyl, R
1 is a methyl group and Z is glycidyl derived from a reduced sugar or alkoxylated derivative
thereof. Examples are N-methyl N-1-deoxyglucityl cocoamide and N-methyl N-1-deoxyglucityl
oleamide. Processes for making polyhydroxy fatty acid amides are known and can be
found in Wilson,
U.S. Patent 2,965,576 and Schwartz,
U.S. Patent 2,703,798, the disclosures of which are incorporated herein by reference.
II. Builder
[0040] The compositions may also comprise from about 0.1% to 80% by weight of a builder.
Preferably such compositions in liquid form will comprise from about 1% to 10% by
weight of the builder component. Preferably such compositions in granular form will
comprise from about 1% to 50% by weight of the builder component. Detergent builders
are well known in the art and can comprise, for example, phosphate salts as well as
various organic and inorganic nonphosphorus builders.
[0041] Water-soluble, nonphosphorus organic builders useful herein include the various alkali
metal, ammonium and substituted ammonium polyacetates, carboxylates, polycarboxylates
and polyhydroxy sulfonates. Examples of polyacetate and polycarboxylate builders are
the sodium, potassium, lithium, ammonium and substituted ammonium salts of ethylene
diamine tetraacetic acid, nitrilotriacetic acid, oxydisuccinic acid, mellitic acid,
benzene polycarboxylic acids, and citric acid. Other suitable polycarboxylates for
use herein are the polyacetal carboxylates described in
U.S. Patent 4,144,226, issued March 13, 1979 to Crutchfield et al, and
U.S. Patent 4,246,495, issued March 27, 1979 to Crutchfield et al, both of which are incorporated herein by reference. Particularly preferred polycarboxylate
builders are the oxydisuccinates and the ether carboxylate builder compositions comprising
a combination of tartrate monosuccinate and tartrate disuccinate described in
U.S. Patent 4,663,071, Bush et al., issued May 5, 1987, the disclosure of which is incorporated herein by reference.
[0042] Examples of suitable nonphosphorus, inorganic builders include the silicates, aluminosilicates,
borates and carbonates. Particularly preferred are sodium and potassium carbonate,
bicarbonate, sesquicarbonate, tetraborate decahydrate, and silicates having a weight
ratio of SiO
2 to alkali metal oxide of from about 0.5 to about 4.0, preferably from about 1.0 to
about 2.4. Also preferred are aluminosilicates including zeolites. Such materials
and their use as detergent builders are more fully discussed in
Corkill et al, U. S. Patent No. 4,605,509, the disclosure of which is incorporated herein by reference. Also, crystalline layered
silicates such as those discussed in
Corkill et al, U. S. Patent No. 4,605,509, incorporated herein by reference, are suitable for use in the detergent compositions
of this invention.
III. Preferred Enzymes
[0043] The laundry products of the present invention may also comprise an enzyme that is
a amylase, lipase, selected protease enzyme, or mixtures thereof. Enzymes are normally
incorporated into detergent compositions at levels sufficient to provide a "cleaning-effective
amount". The term "cleaning-effective amount" refers to any amount capable of producing
a cleaning, stain removal, soil removal, whitening, deodorizing, or freshness improving
effect on substrates such as fabrics. Preferably, the laundry product compositions
of the present invention may contain up to about 5 mg by weight, more typically from
about 0.01 mg to about 3 mg, of active enzyme per gram of the detergent composition.
Stated otherwise, the compositions herein will typically comprise from about 0.001%
to about 5%, preferably from about 0.01% to about 1% by weight of the composition,
of a commercial enzyme preparation. Protease enzymes are preferably present in such
commercial preparations at levels sufficient to provide from 0.005 to 0.1 Anson units
(AU) of activity per gram of composition. Higher active levels may be desirable in
highly concentrated detergent formulations.
[0044] Selected proteases which are useful herein include the subtilisins which are obtained
from particular strains of
B. subtilis and
B. licheniformis. A preferred protease is obtained from a strain of
Bacillus, having maximum activity throughout the pH range of 8-12, developed and sold as ESPERASE
® by Novo Industries A/S of Denmark, hereinafter "Novo". The preparation of this enzyme
and analogous enzymes is described in
GB 1,243,784 to Novo. Other suitable proteases include ALCALASE
® and SAVINASE
® from Novo and MAXATASE
® from International Bio-Synthetics, Inc., The Netherlands. When desired, a protease
having decreased adsorption and increased hydrolysis may be included in the compositions
herein, as described in
WO 9507791 to Procter & Gamble. Another recombinant trypsin-like protease for detergents suitable
herein is described in
WO 9425583 to Novo.
[0045] Any known amylase may be included in the compositions of the present invention.
[0046] Suitable lipase enzymes for use herein include those produced by microorganisms of
the
Pseudomonas group, such as
Pseudomonas stutzeri ATCC 19.154, as disclosed in
GB 1,372,034. See also lipases in Japanese Patent Application
53,20487, laid open Feb. 24, 1978. This lipase is available from Amano Pharmaceutical Co. Ltd., Nagoya, Japan, under
the trade name Lipase P "Amano," or "Amano-P." Other suitable commercial lipases include
Amano-CES, lipases ex
Chromobacter viscosum, e.g.
Chromobacter viscosum var. lipolyticum NRRLB 3673 from Toyo Jozo Co., Tagata, Japan;
Chromobacter viscosum lipases from U.S. Biochemical Corp., U.S.A. and Disoynth Co., The Netherlands, and
lipases ex
Pseudomonas gladioli. LIPOLASE
® enzyme derived from
Humicola lanuginosa and commercially available from Novo, see also
EP 341,947, is a preferred lipase for use herein.
[0047] When the compositions of the present invention contain a compatible enzyme, the compositions
preferably also contain an effective enzyme stabilizing system. The enzyme-containing
compositions herein may therefore optionally also comprise from about 0.001% to about
10%, preferably from about 0.005% to about 8%, most preferably from about 0.01 % to
about 6%, by weight of an enzyme stabilizing system. The enzyme stabilizing system
can be any stabilizing system which is compatible with the enzymes useful herein.
Such a system may be inherently provided by other formulation actives, or be added
separately, e.g., by the formulator or by a manufacturer of enzymes. Such stabilizing
systems can, for example, comprise calcium ion, boric acid, propylene glycol, short
chain carboxylic acids, boronic acids, or mixtures thereof, and are designed to address
different stabilization problems depending on the type and physical form of the detergent
composition.
Liquid Laundry Detergents
[0048] Preferably, the laundry product compositions herein are formulated as liquid laundry
detergents. The liquid laundry detergent compositions preferably comprise from about
3% to about 98%, preferably from about 15% to about 95%, by weight of the liquid detergent
composition, of an aqueous liquid carrier which is preferably water. Preferably, the
liquid laundry compositions according to the present invention should provide a wash
solution pH from about 6 to about 10, more preferably from about 7 to about 9, in
order to maintain a preferred stain removal performance by the liquid laundry products
according to the present invention. If needed, the cleaning compositions may contain
alkalinizing agents, pH control agents and/or buffering agents.
[0049] The density of the laundry detergent compositions herein preferably ranges from about
400 to about 1200 g/litre, more preferably from about 500 to about 1100 g/litre of
composition measured at 20°C.
EXAMPLES
[0050] The following example laundry product formulations may be made by traditional methods
and means as known to one of ordinary skill in the art.
EXAMPLES 1 and 2
[0051]
Liquid Detergent
Ingredient |
Example 1 |
Example 2 |
|
Wt % |
Wt % |
C12-15alkyl polyethoxylate sulfate |
12.31 |
12.31 |
Linear alkylbenzene sulfonate |
5.39 |
5.39 |
Ethanol |
3.44 |
3.44 |
Monoethanolamine |
1.49 |
1.49 |
Propandiol |
6.61 |
6.61 |
C12-13Alkyl polyethoxylate (9) |
2.18 |
2.18 |
C12-14 alkyl dimethylamine N-oxide |
0.73 |
0.73 |
C12-14 fatty acid |
1.98 |
1.98 |
Citric acid |
3.96 |
3.96 |
Borax |
1.50 |
1.50 |
Sodium hydroxide (to pH 8.0) |
5.00 |
5.00 |
Cationic Cellulose* |
0.10 |
0.20 |
PDMS** |
1.50 |
1.50 |
Water, perfume, enzymes, suds suppressor, brightener, additional deposition aid &
other optional ingredients |
to 100% |
to 100% |
* Supplied by Dow Chemicals.
** polydimethylsiloxane, supplied by Dow Coming |
EXAMPLES 3 and 4
[0052]
Powder Detergent
Ingredient |
Example 3 |
Example 4 |
|
Wt % |
Wt % |
C12 linear alkylbenzene sulfonate |
3.44 |
3.44 |
C16-17 methyl branched alkyl sulfate |
9.41 |
9.41 |
C14-15 alkyl sulfate |
4.04 |
4.04 |
AlSil |
37.37 |
37.37 |
Na2CO3 |
22.34 |
22.34 |
PEG |
2.53 |
2.53 |
DTPA |
0.72 |
0.72 |
NaPAA |
1.03 |
1.03 |
Perborate |
2.56 |
2.56 |
Nonanoyloxybenzenesulfonate |
1.92 |
1.92 |
Modified cellulose |
1.54 |
1.54 |
Cationic Cellulose* |
0.15 |
0.20 |
PDMS (100k cSt)** |
1.50 |
2.50 |
Water, perfume, enzymes, suds suppressor, brightener, additional deposition aid &
other optional ingredients |
to 100% |
to 100% |
* Supplied by Dow Chemicals
** polydimethylsiloxane supplied by Dow Corning |
EXAMPLES 5 and 6
[0053]
Fabric Conditioners
Ingredient |
Example 5 |
Example 6 |
|
Wt % |
Wt % |
Di-(tallowyl-oxy-ethyl) dimethyl ammonium chloride. |
18.0 |
24.0 |
NH4Cl |
0.2 |
0.2 |
Cationic Cellulose* |
0.2 |
0.3 |
PDMS (100 k cSt)** |
3.0 |
2.0 |
Water, perfume and minors |
To 100% |
To 100% |
* Supplied by Dow Chemicals
** polydimethylsiloxane supplied by Dow Corning |
[0054] While particular embodiments of the present invention have been illustrated and described,
it would be obvious to those skilled in the art that various other changes and modifications
can be made without departing from the spirit and scope of the invention. It is therefore
intended to cover in the appended claims all such changes and modifications that are
within the scope of this invention.