阅读说明：本技术 个人洗涤组合物和实现改善的调理效益的方法 (Personal wash compositions and methods for achieving improved conditioning benefits ) 是由 朱本川 廖岚 瞿振元 于 2020-04-28 设计创作，主要内容包括：本发明涉及一种个人洗涤组合物,所述组合物包含去污表面活性剂、至少一种流变改性聚合物、至少一种阳离子调理聚合物、至少一种有益试剂和聚磺酸的阴离子聚合物。所述组合物是不含硫酸盐或基本上不含硫酸盐的个人洗涤组合物。本发明进一步涉及一种实现改善的调理效益和/或改善的有益试剂在毛发和/或皮肤上的沉积的方法。(The present invention relates to a personal wash composition comprising a detersive surfactant, at least one rheology modifying polymer, at least one cationic conditioning polymer, at least one benefit agent and an anionic polymer of a polysulfonic acid. The composition is a sulfate-free or substantially sulfate-free personal wash composition. The present invention further relates to a method of achieving improved conditioning benefits and/or improved deposition of benefit agents on hair and/or skin.)

1. A personal wash composition with enhanced deposition of benefit agents, the composition comprising:

a) a detersive surfactant selected from the group consisting of anionic surfactants, amphoteric surfactants, zwitterionic surfactants, and combinations thereof,

b) at least one rheology-modifying polymer selected from the group consisting of,

c) at least one cationic conditioning polymer, wherein the cationic conditioning polymer,

d) an effective amount of at least one benefit agent to condition hair or skin,

e) anionic polymer of polysulfonic acid comprising pendant sulfonate (-SO)₃ ^-) And/or pendant sulfonic acid groups (-SO)₃H) (ii) a Preferably the anionic polymer of the polysulfonic acid comprises at least one monomer having ethylenic unsaturation with a sulfonic acid group,

f) a cosmetically acceptable carrier;

wherein the personal wash composition is sulfate-free or substantially sulfate-free.

2. The composition of claim 1, wherein the anionic polymer of polysulfonic acid comprises at least one monomer having ethylenic unsaturation with a sulfonic acid group selected from the group consisting of 1-acrylamido-1-propanesulfonic acid, 2-acrylamido-2-methyl-1-propanesulfonic acid, 2-methacrylamido-2-methyl-1-propanesulfonic acid, 3-methacrylamido-2-hydroxypropanesulfonic acid, allylsulfonic acid, methallylsulfonic acid, allyloxybenzenesulfonic acid, methallyloxybenzenesulfonic acid, 2-hydroxy-3- (2-propenyloxy) propanesulfonic acid, 2-methyl-2-propene-1-sulfonic acid, poly (meth) acrylic acid, poly (meth) and poly (meth) acrylic acid, poly (meth) and poly (meth) acrylic acid, and poly (meth) acrylic acid, Styrene sulfonic acid, vinyl sulfonic acid, 3-sulfopropyl acrylate, 3-sulfopropyl methacrylate, sulfomethacrylamide, sulfomethylmethacrylamide and mixtures of said acids or water-soluble salts thereof.

3. The composition of claim 1 or 2, wherein the anionic polymer of polysulfonic acid is selected from the group consisting of homopolymers of acrylamide-2-methylpropanesulfonate, copolymers of acrylamide-2-methylpropanesulfonate, and combinations thereof.

4. The composition of any of claims 1-3, wherein the anionic polymer of polysulfonic acid may further comprise a carboxylic acid group containing comonomer selected from the group consisting of acrylic acid, methacrylic acid, ethacrylic acid, alpha-chloroacrylic acid, alpha-cyanoacrylic acid, crotonic acid, alpha-phenylacrylic acid, maleic anhydride, fumaric acid, itaconic acid, citraconic acid, methylenemalonic acid, sorbic acid, cinnamic acid, and mixtures thereof.

5. The composition according to any one of claims 1 to 4, wherein the anionic polymer of polysulfonic acid has a charge density of 0.1 to 9.5meq/g, preferably 0.5 to 7.0meq/g, more preferably 1.0 to 6.5meq/g, still more preferably 2.0 to 5.0 meq/g.

6. The composition according to any one of claims 1-5, wherein the benefit agent is an insoluble or partially insoluble ingredient selected from the group consisting of moisturizers or conditioners, vitamins, vitamin derivatives, hair dyes, silica, pearlescers, anti-UV agents, anti-wrinkle agents, anti-aging agents, antiperspirants, deodorants, abrasives, perfumes or essential oils, skin colorants, antimicrobial agents, anti-dandruff agents and mixtures thereof; preferably, the benefit agent is an antidandruff agent; more preferably, the benefit agent is selected from pyrithione salts; zinc carbonate; an azole; particulate sulfur; keratolytic agents and mixtures thereof.

7. A composition according to any of claims 1 to 6, wherein benefit agent is small particles and is dispersed in the composition, having an average particle size of 0.01 to 400 μm, preferably 0.01 to 200 μm, more preferably 0.01 to 100 μm, still more preferably 0.01 to 50 μm.

8. The composition of any one of claims 1-7, wherein anionic surfactant comprises a compound selected from the group consisting of sulfonates, sulfosuccinates, carboxylates, sarcosinates, isethionates, sulfoacetates, and combinations thereof.

9. The composition according to any one of claims 1-8, wherein the at least one rheology modifying polymer is an associative rheology modifying polymer selected from hydrophobically modified alkali swellable and alkali soluble emulsion polymers, such as copolymers of hydrophilic methacrylates or acrylates and hydrophobic monomers comprising at least one fatty chain; copolymers of vinylpyrrolidone and fatty chain hydrophobic monomers; a hydrophobically modified ethylene oxide urethane polymer; hydrophobically modified hydroxyethyl cellulose polymers, hydrophobically modified hydroxypropyl guar polymers, and mixtures thereof.

10. The composition of any of claims 1-9, wherein the cationic conditioning polymer is selected from the group consisting of cationic polysaccharides and polymers comprising cationic vinyl monomers; preferably, the cationic conditioning polymer is selected from the group consisting of cationic guar derivatives, cationic cellulose derivatives, cationic starch derivatives, homopolymers and copolymers of dimethyldiallylammonium chloride (DMDAAC), homopolymers and copolymers of methacrylamidopropyltrimethylammonium chloride (MAPTAC), homopolymers and copolymers of acrylamidopropyltrimethylammonium chloride (APTAC), homopolymers and copolymers of methacryloyloxyethyltrimethylammonium chloride (METAC), homopolymers and copolymers of acryloxyethyltrimethylammonium chloride (AETAC), homopolymers and copolymers of methacryloyloxyethyltrimethylammonium methyl sulfate (METAMS), and combinations thereof; more preferably, the cationic conditioning polymer is a cationic guar derivative, a cationic cellulose derivative or a cationic starch derivative.

11. The composition according to any one of claims 1 to 10, wherein the anionic polymer of polysulfonic acid is present in an amount of 0.01 to 10% by weight, preferably 0.05 to 5% by weight.

12. The composition according to any one of claims 1-11, wherein the composition is a cosmetic hair composition applied to hair for washing, conditioning or styling purposes.

13. The composition of any one of claims 1-11, wherein the composition is a shampoo, a hair conditioner, a hair treatment, a hair styling composition.

14. A method of achieving improved conditioning benefits, the method comprising applying to skin and/or hair a composition according to any one of claims 1-11.

15. A method of achieving improved deposition of benefit agents on hair and/or skin, the method comprising applying to skin and/or hair a composition according to any one of claims 1-11.

16. A method of achieving improved deposition of benefit agents on hair and/or skin according to claim 14 or 15 wherein benefit agents are dispersed in the composition and have a small particle size.

17. Use of a composition as defined in any one of claims 1 to 11 for caring for and washing keratin materials such as hair and skin.

Technical Field

The present invention relates to a personal wash composition. The present invention also relates to a sulfate-free personal wash composition with improved deposition of conditioning benefit agents. More particularly, the present invention relates to a method of achieving improved conditioning benefits by applying the composition to hair and/or skin.

Background

Conventional personal wash compositions, such as shampoos, body washes, and liquid hand soaps, contain standard surfactants, such as anionic, nonionic, and/or amphoteric types of surfactants. Sulfate-based surfactant systems (such as, but not limited to, sodium lauryl sulfate and sodium lauryl ether sulfate) are commonly used because they are effective in foam generation and stability as well as in deposition of conditioning/health aids to target substrates such as hair or skin. It is believed that the deposition is by a polymer-surfactant complex, called a coacervate, which forms upon dilution with water. The conditioner/health aid is captured by the coacervate, which precipitates out of solution and deposits onto the substrate, thereby delivering the conditioner/health aid. Personal wash compositions comprising sulphate based surfactants are generally easy to thicken with typical thickeners such as salts and cellulose based materials.

However, current personal care compositions comprising sulfate-containing surfactants also suffer from significant drawbacks. In fact, sulfate-containing surfactants such as Sodium Laureth Sulfate (SLS) are known to be prone to tolerance problems, particularly on the skin and eyes. Another disadvantage of sulfate-containing surfactants is their tendency to strip the natural oils, fats or proteins contained on their surface from the skin, scalp or hair. Thus, repeated use of personal care compositions comprising sulfate-containing surfactants for extended periods of time may cause irritation to the skin or scalp and/or damage to hair fibers.

Furthermore, sulfate-free cleaning compositions are difficult to thicken sufficiently to provide good use qualities to the user. Several attempts have been made in the prior art to thicken the formulation. Us patent 2015/0335555 discloses a process which uses high levels of surfactant to benefit from the self-assembling nature of such ingredients. This method is the most common, but also expensive. The second approach is to use rheology modifying polymers which can adversely affect the properties of the composition, for example leading to poor deposition of conditioning/benefit agents from the composition. For example, U.S. patent 2012/0213725 describes the use of surfactant-polymer blends to increase the viscosity of cleaning compositions. However, as noted above, the use of such rheology-modifying polymers can adversely affect both the cleaning and/or lathering properties of the cleaning composition, requiring the use of increased amounts of cleaning surfactants, and adversely affecting coacervate formation and deposition of benefit agents.

Accordingly, there has recently been an increasing demand for personal care compositions, especially sulfate-free personal care compositions, that include safe, environmentally friendly and/or mild surfactants.

It is therefore an object of the present invention to address the growing need in the market for personal care compositions, particularly personal wash compositions, more particularly shampoos, which use sulfate-free surfactants and provide enhanced deposition of conditioning/benefit agents from the composition.

Brief description of the invention

In one aspect, the present invention relates to a personal wash composition with enhanced deposition of benefit agents, the composition comprising:

a) a detersive surfactant selected from the group consisting of anionic surfactants, amphoteric surfactants, zwitterionic surfactants, and combinations thereof,

b) at least one rheology-modifying polymer selected from the group consisting of,

c) at least one cationic conditioning polymer, wherein the cationic conditioning polymer,

d) an effective amount of at least one benefit agent to condition hair or skin,

e) anionic polymer of polysulfonic acid comprising pendant sulfonate (-SO)₃ ^-) And/or pendant sulfonic acid groups (-SO)₃H) (ii) a Preferably the polysulfonic acid comprises at least one monomer having ethylenic unsaturation with a sulfonic acid group,

f) a cosmetically acceptable carrier;

in particular, sulfate-free or substantially sulfate-free personal wash compositions are preferred.

Preferably, the at least one rheology modifying polymer is an associative rheology modifying polymer, including hydrophobically modified alkali-swellable and alkali-soluble emulsion polymers, such as hydrophobically modified poly (meth) acrylates, prepared by copolymerizing a mixture of (meth) acrylic monomers and hydrophobic comonomers; a hydrophobically modified ethylene oxide urethane polymer; a hydrophobically modified polyether; hydrophobically modified hydroxyethyl cellulose polymer, hydrophobically modified hydroxypropyl guar polymer, or mixtures thereof.

Preferably, the at least one polysulfonic anionic polymer comprises at least one monomer having ethylenic unsaturation with a sulfonic acid group, wherein the monomer is selected from the group consisting of 1-acrylamido-1-propanesulfonic acid, 2-acrylamido-2-methyl-1-propanesulfonic acid, 2-methacrylamido-2-methyl-1-propanesulfonic acid, 3-methacrylamido-2-hydroxypropanesulfonic acid, allylsulfonic acid, methallylsulfonic acid, allyloxybenzenesulfonic acid, methallyloxybenzenesulfonic acid, 2-hydroxy-3- (2-propenyloxy) propanesulfonic acid, 2-methyl-2-propene-1-sulfonic acid, 2-propenylsulfonic acid, and mixtures thereof, Styrenesulfonic acid, benzenesulfonic acid, toluenesulfonic acid or naphthalenesulfonic acid, benzenedisulfonic acid or naphthalenedisulfonic acid, alkylated benzenesulfonic acid or naphthalenesulfonic acid, vinylsulfonic acid, 3-sulfopropyl acrylate, 3-sulfopropyl methacrylate, sulfomethacrylamide, sulfomethylmethacrylamide, and mixtures thereof.

Preferably, the benefit agent is selected from insoluble or partially insoluble ingredients such as moisturizers or conditioners, vitamins, vitamin derivatives, hair dyes, silica, pearlescers, UV-resistant agents, anti-wrinkle agents, anti-aging agents, antiperspirants, deodorants, abrasives, perfumes or essential oils, skin colorants, antimicrobial agents, antidandruff agents and/or mixtures thereof; more preferably, the benefit agent is an antidandruff agent.

In another aspect, the present invention relates to a method of achieving improved conditioning benefits, said method comprising applying to the skin and/or hair said personal wash composition, in particular said personal wash composition being sulphate-free or substantially sulphate-free.

In yet another aspect, the present invention relates to a method of achieving improved deposition of hair and/or skin care benefit agents on hair and/or skin, the method comprising applying to hair and/or skin the personal wash composition; in yet another aspect, the present invention relates to a method of achieving improved deposition of hair and/or skin care benefit agents dispersed in a composition and having a small particle size, the method comprising applying the personal wash composition to hair and/or skin; in particular, the personal wash composition is sulfate-free or substantially sulfate-free.

In another aspect, the present invention relates to the use of personal wash compositions to care for and wash keratin materials such as hair and skin.

It has been found that the sulfate-free personal wash compositions of the present invention can result in improved coacervate properties, which result in enhanced conditioning and deposition of skin/hair actives, while also having desirable viscosity/rheology properties.

Without being limited by theory, the sulfate-free personal wash compositions of the present invention are not only capable of providing the desired viscosity for use as a personal care cleansing composition, but also are capable of mitigating the adverse effects caused by thickening sulfate-free compositions with rheology modifying polymers. Without being limited by theory, when the compositions of the present invention comprise a benefit agent, the compositions can provide further conditioning benefits due to adequate deposition of the conditioning agent. Without being limited by theory, it is believed; a preferred embodiment of the compositions of the present invention are compositions comprising benefit agents dispersed in the composition and having a smaller particle size, as it is believed that such agents are absorbed or attached to the surface of the coacervate, or incorporated into the coacervate, and then effectively deposited on the skin/hair with the coacervate.

Detailed Description

Before explaining at least one embodiment of the inventive concepts disclosed and/or claimed herein in detail, it is to be understood that the inventive concepts disclosed and/or claimed herein are not limited in their application to the details of construction and the arrangement of the components or steps or methods set forth in the following description. The inventive concepts disclosed and/or claimed herein are capable of other embodiments or of being practiced or carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.

Unless otherwise defined herein, technical terms used in connection with the inventive concepts disclosed and/or claimed herein shall have the meanings that are commonly understood by those skilled in the art. Furthermore, unless the context requires otherwise, singular terms shall include the plural and plural terms shall include the singular.

In light of the present disclosure, all of the compositions and/or methods disclosed herein can be made and practiced without undue experimentation. While the compositions and methods of the inventive concepts disclosed and/or claimed herein have been described in terms of preferred embodiments, it will be apparent to those of skill in the art that variations may be applied to the compositions and/or methods and in the steps or in the sequence of steps of the methods described herein without departing from the concept, spirit and scope of the inventive concepts disclosed and/or claimed herein. All such similar substitutes and modifications apparent to those skilled in the art are deemed to be within the spirit, scope and concept of the inventive concept disclosed and/or claimed herein.

As used in accordance with this disclosure, the following terms should be understood to have the following meanings, unless otherwise indicated.

Throughout the specification including the claims, the terms "comprising" or "comprising" should be interpreted as being synonymous with the term "including at least one" unless otherwise specified, and "between …" should be interpreted as including a limitation.

The terms "a", "an" and "the" are used to refer to one or to more than one (i.e., to at least one) of the grammatical object of the article.

The term "and/or" includes the meaning of "and", "or", and all other possible combinations of elements associated with the term.

In the context of the present invention, the term "substantially free of sulphate" is understood to mean that the composition does not have a significant amount of sulphated compounds acting as surfactants. In particular, it is understood hereinafter that sulfated compounds are included in an amount of less than 0.01% by weight, more particularly, not in detectable amounts, based on the total composition.

The term "personal wash composition" as used herein refers to the compositions of the present invention, wherein the compositions are intended to include those compositions for topical application to hair or skin.

The term "benefit agent" as used herein is to be understood broadly and is intended to refer to an agent intended to produce a hair and/or skin care benefit when included in a personal wash composition in an appropriate amount.

The term "rheology modifying polymer" as used herein refers to a polymer that treats the properties of the polymer to alter the rheological properties of a given composition.

The term "polymer" as used herein refers to the product of a polymerization reaction and includes homopolymers, copolymers, terpolymers, tetrapolymers, etc.; herein, "copolymer" refers to a polymer formed by polymerization of at least two different monomers, and includes random copolymers, block copolymers, graft copolymers, and the like.

The term "derivative" as used herein includes, but is not limited to, amide, ether, ester, amino, carboxyl, acetyl, acid, salt and/or alcohol derivatives of a given compound.

The term "charge density" as used herein means the ratio of the number of positive charges on a monomeric unit (comprised by a polymer) to the molecular weight of said monomeric unit. The charge density multiplied by the polymer molecular weight determines the number of positively charged sites on a given polymer chain.

The term "coacervate" as used herein refers to the chemical complex formed between the cationic polymer and the anionic surfactant/polymer upon dilution of the personal wash composition. Without being bound by a particular theory, "coacervates" provide improved hair and skin conditioning without any additional conditioning actives. In addition, the coacervate provides an improved mechanism for deposition of conditioning agent when the dispersed conditioning agent droplets are added to the substrate, resulting in deposition of conditioning agent that yields even more conditioning benefit.

The term "cosmetically acceptable" refers to ingredients commonly used in personal care compositions, and is intended to emphasize that toxic materials are not considered part of the present invention when present in amounts commonly found in personal care compositions.

In one aspect, the present invention relates to a personal wash composition with enhanced deposition of benefit agents, the composition comprising:

a) a detersive surfactant selected from the group consisting of anionic surfactants, amphoteric surfactants, zwitterionic surfactants, and combinations thereof,

b) at least one rheology-modifying polymer selected from the group consisting of,

c) at least one cationic conditioning polymer, wherein the cationic conditioning polymer,

d) an effective amount of at least one benefit agent to condition hair or skin,

e) anionic polymer of polysulfonic acid comprising pendant sulfonate (-SO)₃ ^-) And/or pendant sulfonic acid groups (-SO)₃H) (ii) a Preferably the polysulfonic acid comprises at least one monomer having ethylenic unsaturation with a sulfonic acid group,

f) a cosmetically acceptable carrier;

in particular, sulfate-free or substantially sulfate-free personal wash compositions are preferred.

Detersive surfactant

The personal wash compositions of the present invention comprise a detersive surfactant selected from the group consisting of anionic surfactants, amphoteric surfactants, zwitterionic surfactants, and combinations thereof. In particular, the surfactant used in the present invention is a sulfate-free surfactant or a substantially sulfate-free surfactant.

Suitable anionic surfactants for use in the present invention, alone or as part of a nonionic/anionic surfactant mixture, include materials having a negatively charged hydrophobe or which carry a negative charge when the pH is raised to neutral or above, such as acylamino acids and salts thereof, e.g., acyl glutamates, acyl peptides, sarcosinates and taurates; carboxylic acids and salts thereof, such as alkanoic acids and alkanoates, carboxylates, and ether carboxylic acids; phosphate esters and salts thereof; sulfonic acids and salts thereof, such as acyl isethionates, alkylaryl sulfonates, alkyl sulfonates, and sulfosuccinates. Non-limiting examples of anionic surfactants used alone or as part of a nonionic/anionic surfactant mixture include the monobasic salts of acyl glutamates that are slightly acidic in aqueous solution, such as sodium acyl glutamate and hydrogenated tallow sodium glutamate; salts of acyl-hydrolyzed proteins, e.g. potassium salts, palmitoyl-hydrolyzed milk proteins, sodium salts, potassium salts, sodium salts, and the like,Sodium cocoyl hydrolyzed soy protein and TEA-colonoyl hydrolyzed collagen; acyl sarcosinates such as ammonium myristoyl sarcosinate, sodium cocoyl sarcosinate, and TEA-lauroyl sarcosinate; sodium salts of methyl acyl taurates, such as sodium lauroyl taurate and sodium methylcocoyl taurate; alkanoic and alkanoic acids, such as fatty acids derived from animal and vegetable glycerides, which form water soluble and water insoluble emulsified soaps, including sodium stearate, aluminum stearate, and zinc undecylenate; carboxylic acid esters such as dinonylphenol polyoxyethylene (9) ether citrate; acyl lactylates, such as calcium stearoyl lactylate and lauryl polyoxyethylene (6) ether citrate; ether carboxylic acids derived from ethoxylated alcohols or phenols having different polyoxyethylene chain lengths, such as nonylphenol polyoxyethylene (8) ether carboxylic acid and sodium trideceth-13 ether carboxylate; monoesters and diesters of phosphoric acid and salts thereof, such as phospholipids, dilaurylpolyoxyethylene (4) ether phosphate, DEA-oleylpolyoxyethylene (10) ether phosphate and triethanolamine lauryl phosphate; acyl isethionates, such as sodium cocoyl isethionate; alkyl aryl benzene sulfonates such as alpha-olefin sulfonates and the alkali metal, alkaline earth metal and alkanolamine salts thereof, and sodium dodecylbenzene sulfonate; alkyl sulfonates, e.g. C₁₂-C₁₄Sodium olefin sulfonate, sodium coconut monoglyceride sulfonate, C₁₂-C₁₅Sodium alkyl polyoxyethylene (15) ether sulfonate and sodium lauryl sulfoacetate; sulfosuccinates, e.g. mono-and diesters of sulfosuccinic acid, salts thereof and alkoxylated alkyl and alkylamido derivatives thereof, e.g. di-C sulfosuccinic acid₄-C₁₂Sodium alkyl ester, disodium laureth sulfosuccinate, disodium oleamido MEA-sulfosuccinate and C₁₂-C₁₅And disodium alkyl polyoxyethylene ether sulfosuccinate.

In some preferred embodiments, the anionic surfactant used alone or as part of a nonionic/anionic surfactant mixture may comprise, consist of, or consist essentially of a compound selected from the group consisting of: ammonium, alkali or alkaline earth metal salts of sulfonic acids, sulfosuccinic acids, carboxylic acids, sarcosine, isethionic acid, sulfoacetic acid, and combinations thereof. More particularly, the anionic surfactant used alone or as part of a nonionic/anionic surfactant mixture may comprise, consist of, or consist essentially of a compound selected from the group consisting of: sodium alpha-olefin sulfonate, disodium laureth sulfosuccinate, sodium laureth (5) carboxylate, sodium lauroyl sarcosinate, sodium cocoyl isethionate, sodium lauryl sulfoacetate, and combinations thereof.

The amphoteric surfactant used in the present invention may comprise, consist of, or consist essentially of a compound selected from the group consisting of: cocamidopropyl betaine, cocamidohydroxysultaine, cocoamphoacetate, sodium methylcocoyltaurate, and combinations thereof.

The nonionic surfactant used in the present invention may comprise, consist of, or consist essentially of a compound selected from the group consisting of: alkyl glucosides, cocamide monoethanolamine, cocamide diethanolamine, glycerol alkyl esters, polyethylene glycols, and combinations thereof.

Suitable anionic surfactant components for use in the personal wash compositions of the present invention herein include those known for use in hair care or other personal care compositions. The concentration of the anionic surfactant system in the personal wash composition should be sufficient to provide the desired cleaning and lather performance, and is generally from about 5 to about 50 wt%, preferably from about 8 to about 30 wt%, more preferably from about 10 to about 25 wt%, based on the total weight of the composition.

Rheology modifying polymers

Rheology-modified polymers are used to adjust the viscosity of various consumer and commercial products, including personal cleansing compositions, such as shampoos and body washes. Rheology modifying polymers can be used to thicken the formulation to provide more attractive viscosities and to provide desired flow characteristics, and can also be used to suspend encapsulated additives, solid particles or gas bubbles within the formulation for extended periods of time, effectively preventing settling.

Suitable rheology-modified polymers of the present invention include synthetic and semi-synthetic rheology-modified polymers. Exemplary synthetic rheology-modified polymers include acrylic-based polymers and copolymers. One class of acrylic-based rheology modifying polymers are carboxy-functional, alkali-swellable and alkali-soluble thickeners prepared by free radical polymerization of acrylic acid alone or in combination with other ethylenically unsaturated monomers. The polymers may be synthesized by solvent/precipitation as well as emulsion polymerization techniques. Exemplary synthetic rheology-modified polymers of this type include homopolymers of acrylic or methacrylic acid and copolymers made from acrylic acid, substituted acrylic acids, and salts of acrylic acid and substituted acrylic acids and C₁-C₃₀Copolymers polymerized from one or more monomers of an alkyl ester. Substituted acrylic acids as defined herein contain substituents on the alpha and/or beta carbon atoms of the molecule, wherein the substituents are preferably and independently selected from C_1-4Alkyl, -CN and-COOH. Optionally, other ethylenically unsaturated monomers, such as styrene, vinyl acetate, ethylene, butadiene, acrylonitrile, and mixtures thereof, may be copolymerized into the backbone. The polymers described above are optionally crosslinked by the inclusion of two or more monomers containing ethylenic unsaturation. In one aspect, the crosslinking agent is selected from polyalkenyl polyethers of polyols containing at least two alkenyl ether groups per molecule. Other exemplary crosslinking agents are selected from allyl ethers of sucrose and allyl ethers of pentaerythritol and mixtures thereof. These polymers are more fully described in U.S. patent 5087445, U.S. patent 4509949, and U.S. patent 2798053, the entire contents of which are incorporated herein by reference.

In another aspect, the rheology modifying polymer is selected from crosslinked copolymers of a first monomer selected from one or more of acrylic acid, substituted acrylic acid, salts of acrylic acid, and substituted salts of acrylic acid and C selected from one or more of acrylic acid or methacrylic acid₁₀-C₃₀A second monomer of an alkyl ester is polymerized. In one aspect, the monomer may be polymerized in the presence of a steric stabilizer, for example as disclosed in U.S. patent 5288814.

In some embodiments of the invention, another class of synthetic rheology-modified polymers suitable for use in embodiments of the invention include hydrophobically modified alkali-swellable and alkali-soluble emulsion polymers. Typical hydrophobically modified alkali swellable polymers are polymers made from pH sensitive or hydrophilic monomers (e.g. acrylic acid and/or methacrylic acid), hydrophobic monomers (e.g. C of acrylic acid and/or methacrylic acid)₁-C₃₀Alkyl esters, acrylonitrile, styrene) and optionally "associative monomers" and optionally crosslinking monomers. The associative monomer comprises an ethylenically unsaturated polymerizable end group, a nonionic hydrophilic intermediate portion terminated by a hydrophobic end group. The nonionic hydrophilic intermediate portion comprises a polyoxyalkylene group, such as polyethylene oxide, polypropylene oxide, or a mixture of polyethylene oxide/polypropylene oxide segments. Terminal hydrophobic end groups are typically C₈-C₄₀An aliphatic moiety. Exemplary aliphatic moieties are selected from the group consisting of linear and branched alkyl substituents, linear and branched alkenyl substituents, carbocyclic substituents, aryl substituents, aralkyl substituents, and alkaryl substituents. In one aspect, the associative monomer may be formed by polyethoxylated and/or polypropoxylated aliphatic alcohols (typically containing branched or unbranched C)₈-C₄₀Aliphatic moieties) with ethylenically unsaturated monomers containing carboxylic acid groups (e.g. acrylic acid, methacrylic acid), unsaturated cyclic anhydride monomers (e.g. maleic anhydride, itaconic anhydride, citraconic anhydride), monoethylenically unsaturated monoisocyanates (e.g. α, α -dimethyl m-isopropenyl benzyl isocyanate) or ethylenically unsaturated monomers containing hydroxyl groups (e.g. vinyl alcohol, allyl alcohol) (e.g. esterification or etherification). The polyethoxylated and/or polypropoxylated aliphatic alcohol being C-containing₈-C₄₀Ethylene oxide and/or propylene oxide adducts of monohydric alcohols of the aliphatic moiety. Containing C₈-C₄₀Non-limiting examples of alcohols of the aliphatic moiety are octanol, isooctanol (2-ethylhexanol), nonanol (1-nonanol), decanol, lauryl alcohol, myristyl alcohol, cetyl alcohol, cetostearyl alcohol (C)₁₆-C₁₈Mixtures of monohydric alcohols), stearyl alcohol, isostearyl alcohol, trans-octadecyl alcoholEnol, oleyl alcohol, arachidyl alcohol, behenyl alcohol, lignoceryl alcohol, ceryl alcohol, montanyl alcohol, melissyl alcohol, lac alcohol, 1-tridecyl alcohol and C₂-C₂₀Alkyl-substituted phenols (e.g., nonylphenol), and the like.

In some embodiments of the invention, another class of synthetic and semi-synthetic rheology-modified polymers suitable for use in embodiments of the invention include cationically modified acrylic polymers and copolymers and cationically modified cellulose ethers. Acrylic polymers and copolymers and cellulose ethers are cationically modified by quaternization. For acrylic polymers and copolymers, quaternization can be carried out by polymerizing the quaternized monomer into the acrylic polymer backbone or by post-functionalizing the acrylic polymer with a quaternizing agent.

More preferably, the rheology modifying polymer used in the present invention is an associative rheology modifying polymer, which means an amphiphilic polymer capable of reversibly binding to itself or to other molecules in an aqueous medium. Which typically includes in its chemical structure at least one hydrophilic region or group and at least one hydrophobic region or group. Suitable examples include: i) cellulose modified with groups comprising at least one fatty chain (hydrophobically modified cellulose), for example hydroxyethylcellulose modified with groups comprising at least one fatty chain, such as alkyl, arylalkyl or alkylacryloyl groups or mixtures thereof, and wherein the alkyl group is preferably C₈-C₂₂(hydrophobically modified hydroxyethyl cellulose polymers); and/or cellulose modified with polyalkylene glycol alkylphenyl ether groups, such as the product Amercell Polymer-HM-1500 (nonylphenyl polyethylene glycol (15) ether) sold by Amerchol; ii) with a catalyst comprising at least one C₈-C₃₀Hydrophobically modified hydroxypropyl guar (hydrophobically modified hydroxypropyl guar polymers) modified with groups of fatty chains, for example RE210-18 (C) sold by Rhodia₁₄Alkyl chains); iii) a hydrophobically modified polyether; iv) a hydrophobically modified ethylene oxide urethane polymer; v) hydrophobically modified alkali-soluble or swellable emulsion polymers, such as hydrophobically modified poly (meth) acrylates, prepared by copolymerizing a mixture of (meth) acrylic monomers and hydrophobic comonomers. Suitable rheology modifying polymers useful in the present invention are commercially available, for example, from BASFTTA (a polymer of 2-methyl-2-acrylic acid, 2-butyl acrylate and 2-ethyl acrylate),SC 81、FIT、SC 80 andGTC。

according to any embodiment of the present invention, the rheology modifying polymer is present in the personal wash composition in an amount sufficient to impart the desired rheological properties to the desired composition. In particular, when the composition comprises insoluble or partially insoluble ingredients, the rheology modifier is used in an amount sufficient to suspend the encapsulated additive, solid particles or gas bubbles and to effectively prevent settling. As a non-limiting example, the rheology modifying polymer is present in an amount of from 0.05 to 10 weight percent, such as from 0.1 to 5 weight percent, for example from 0.1 to 3 weight percent, based on the total weight of the composition.

Anionic polymers of polysulfonic acids

According to any of the embodiments of the present invention, the personal wash composition comprises at least one anionic polymer of polysulfonic acid comprising pendant sulfonate (-SO)₃ ^-) And/or pendant sulfonic acid groups (-SO)₃H)。

In some embodiments, the personal wash composition comprises at least one anionic polymer of a polysulfonic acid comprising at least one monomer having ethylenic unsaturation with a sulfonic acid group. The anionic polymer may be a homopolymeric and/or copolymeric polysulfonic acid.

Preferably containing sulfonic acidsThe monomer of the radical being of the formula R¹(R²)C＝C(R³)-X-SO₃H, wherein R¹To R³Independently of one another represents-H, -CH₃Straight-chain or branched saturated alkyl having 2 to 12 carbon atoms, straight-chain or branched, mono-or polyunsaturated alkenyl having 2 to 12 carbon atoms, or-NH₂An alkyl or alkenyl group substituted by-OH or-COOH, or represents-COOH or-COOR⁴Wherein R is⁴Is a saturated or unsaturated, linear or branched hydrocarbon radical having from 1 to 12 carbon atoms and X represents an optionally present spacer selected from- (CH) s wherein n is an integer from 0 to 4₂) n-COO- (CH) wherein m is an integer of 1 to 6₂)_m-，-C(O)-NH-C(CH₃)₂ ^-，-C(O)-NH-C(CH₃)₂CH₂-and-C (O) -NH-CH (CH)₃)-CH₂-。

Preferred among these monomers are those of the formula:

H₂C＝CH-X-SO₃H

H₂C＝C(CH₃)-X-SO₃H

HO₃S-X-(R²)C═C(R³)-X-SO₃H，

wherein R is²And R³Independently of one another from the group-H, -CH₃、-CH₂CH₃、-CH₂CH₂CH₃、-CH(CH₃)₂And X represents an optional spacer selected from- (CH) wherein n is an integer of 0 to 4₂)_n-COO- (CH) wherein m is an integer of 1 to 6₂)_m-，-C(O)-NH-C(CH₃)₂-，-C(O)-NH-C(CH₃)₂-CH₂-and-C (O) -NH-CH (CH)₃)-CH₂-。

In some embodiments, more preferred sulfonic acid group-containing monomers herein are 1-acrylamido-1-propanesulfonic acid, 2-acrylamido-2-methyl-1-propanesulfonic acid, 2-methacrylamido-2-methyl-1-propanesulfonic acid, 3-methacrylamido-2-hydroxypropanesulfonic acid, allylsulfonic acid, methallylsulfonic acid, allyloxybenzenesulfonic acid, methallyloxybenzenesulfonic acid, 2-hydroxy-3- (2-propenyloxy) propanesulfonic acid, 2-methyl-2-propene-1-sulfonic acid, styrenesulfonic acid, benzenesulfonic acid, toluenesulfonic acid or naphthalenesulfonic acid, benzenedisulfonic acid or naphthalenedisulfonic acid, benzenedisulfonic acid, and/or benzenedisulfonic acid, and benzenedisulfonic acid, Alkylated benzenesulfonic or naphthalenesulfonic acids, vinylsulfonic acid, 3-sulfopropyl acrylate, 3-sulfopropyl methacrylate, sulfomethacrylamide, sulfomethylmethacrylamide, mixtures thereof or water-soluble salts thereof. Preferably, suitable polysulfonic acids for use in the present invention include homopolymers of acrylamido-2-methylpropanesulfonic acid, copolymers of acrylamido-2-methylpropanesulfonic acid, or combinations thereof.

In some embodiments, the polysulfonic acids suitable for this invention are natural polymers including, but not limited to, lignosulfonates, alkyl succinyl soy sulfonates such as C₈-C₁₆Sodium isoalkylsuccinyl soya sulfonate, alkylsuccinyl lactoglobulin sulfonates such as C₈-C₁₆Sodium isoalkylsuccinylcellulose lactoglobulin sulfonate, shale oil sulfonate, hydroxyethylcellulose sulfonate such as sodium stearyloxy PG-hydroxyethylcellulose sulfonate, guaiazulene sulfonate, and alkyl glucoside sulfonate such as hydroxypropyl sulfonate lauryl glucoside cross-linked polymer.

The sulfonic acid groups may be present in the polymer in fully or partially neutralized form, i.e. the acidic hydrogen atoms of the sulfonic acid groups may be replaced by metal ions, preferably alkali metal ions, in particular sodium ions, in some or all of the sulfonic acid groups. According to the invention, preference is given to using copolymers which contain partially or completely neutralized sulfonic acid groups.

In some embodiments, the anionic polymer may be a copolymerized polysulfonic acid comprising a carboxylic acid group-containing monomer and a sulfonic acid group-containing monomer. In some preferred embodiments, the copolymer comprises 5 to 95 weight percent, preferably 20 to 90 weight percent, more preferably 40 to 60 weight percent of the sulfonic acid-containing monomer, based on the total weight of the copolymer.

Suitable unsaturated carboxylic acid monomers for use in the present invention are of the formula R⁵(R⁶)C＝C(R⁷) Unsaturated carboxylic acid of COOH, wherein R⁵To R⁷Independently of one another, represents-H, -CH as defined above₃Straight-chain or branched saturated alkyl having 2 to 12 carbon atoms, straight-chain or branched, mono-or polyunsaturated alkenyl having 2 to 12 carbon atoms, or-NH₂An alkyl or alkenyl group substituted by-OH or-COOH, or represents-COOH or-COOR⁸Wherein R is⁸Is a saturated or unsaturated, linear or branched hydrocarbon radical having from 1 to 12 carbon atoms.

In some embodiments, the copolymer comprises 5 to 95 weight percent, preferably 10 to 80 weight percent, more preferably 40 to 60 weight percent, of the carboxylic acid group-containing monomer based on the total weight of the copolymer. More preferred unsaturated carboxylic acids are acrylic acid, methacrylic acid, ethacrylic acid, alpha-chloroacrylic acid, alpha-cyanoacrylic acid, crotonic acid, alpha-phenylacrylic acid, maleic anhydride, fumaric acid, itaconic acid, citraconic acid, methylenemalonic acid, sorbic acid, cinnamic acid, or mixtures thereof. Unsaturated dicarboxylic acids may also be used. In some embodiments, the copolymer may optionally further comprise at least one nonionic monomer in addition to the carboxyl group-containing monomer and the sulfonic acid group-containing monomer.

According to any embodiment of the invention, the charge density and average molar mass (Mw) of the polysulfonic anionic polymers may be varied in order to tailor the properties of the polymer to the desired intended application. In some preferred embodiments for use in personal wash compositions, the polymer exhibits a charge density of from 0.1 to 9.5meq/g, preferably from 0.5 to 7.0meq/g, more preferably from 1.0 to 6.5meq/g, still more preferably from 1.5 to 5.5meq/g, and the polymer exhibits an average molar mass (Mw) of from 1,000-2,000,000g/mol, preferably 10,000-2,000,000 g/mol.

According to any of the embodiments of the present invention, the polysulfonic anion polymers are present in an effective amount in a personal wash composition to coacervate with an oppositely charged compound. The polysulfonic acid is generally present at a level of from 0.01 to 10 weight percent, preferably from 0.05 to 5 weight percent, more preferably from 0.1 to 2 weight percent, still more preferably from 0.1 to 1 weight percent, based on the total weight of the composition.

Cationic conditioning polymers

The personal wash compositions of the present invention comprise cationic conditioning polymers for enhancing the conditioning performance of the compositions. The cationic conditioning polymer may be a homopolymer or formed from two or more monomers. The molecular weight of the polymer is generally 5,000-10,000,000g/mol, typically at least 10,000g/mol, preferably 100,000 to about 2,000,000 g/mol. The polymer has cationic nitrogen-containing groups, such as quaternary ammonium or protonated amino groups, or mixtures thereof. The cationic nitrogen-containing group is typically present as a substituent on a portion of the total monomer units of the cationic polymer. Thus, when the polymer is not a homopolymer, it may comprise spacer non-cationic monomer units. Such polymers are described in the CTFA cosmetic ingredient catalog, 3 rd edition. The ratio of cationic to non-cationic monomer units is selected to give a polymer having a cationic charge density in the desired range.

Suitable cationic conditioning polymers include, for example, copolymers of cationic vinyl monomers having cationic amine or quaternary ammonium functionality with water-soluble spacer monomers such as (meth) acrylamide, alkyl and dialkyl (meth) acrylamides, alkyl (meth) acrylates, vinyl caprolactone and vinyl pyrrolidine. The alkyl and dialkyl substituted monomers preferably have C₁-C₇Alkyl, more preferably C₁-C₃An alkyl group. Other suitable spacer monomers include vinyl esters, vinyl alcohol, maleic anhydride, propylene glycol, and ethylene glycol. The cationic amine can be a primary, secondary, or tertiary amine, depending on the particular species and pH of the composition. Secondary and tertiary amines, especially tertiary amines, are generally preferred. Amine-substituted vinyl monomers and amines can be polymerized in the amine form and then converted to ammonium by quaternization. The cationic conditioning polymer may comprise a mixture of monomeric units derived from amine-and/or quaternary ammonium-substituted monomers and/or compatible spacer monomers. Suitable examples of synthetic cationic conditioning polymers of the present invention include homopolymers and copolymers of dimethyldiallylammonium chloride (DMDAAC), homopolymers and copolymers of methacrylamidopropyltrimethylammonium chloride (MAPTAC), homopolymers and copolymers of acrylamidopropyltrimethylammonium chloride (APTAC), homopolymers and copolymers of methacryloyloxyethyltrimethylammonium chloride (METAC)Homopolymers and copolymers of acryloxyethyltrimethyl ammonium chloride (AETAC), and homopolymers and copolymers of methacryloxyethyltrimethyl ammonium methyl sulfate (METAMS).

Other suitable cationic conditioning polymers that can be used include cationic polysaccharide polymers, such as cationic cellulose derivatives, cationic starch derivatives, and cationic guar gum derivatives. Suitably, such cationic polysaccharide polymers have a charge density of from 0.1 to 4 meq/g.

According to any embodiment of the present invention, one of the suitable cationic conditioning polymers may be a cationic guar polymer, which is a cationic substituted galactomannan (guar) gum derivative. The guar gum used to prepare these guar derivatives is usually obtained as a naturally occurring substance from the seeds of the guar plant. The guar molecule itself is a linear mannan that is branched at regular intervals with a single galactose unit on alternating mannose units. Mannose units are linked to each other by □ (1-4) glycosidic bonds. Galactose branching occurs through □ (1-6) linkages. Cationic derivatives of guar gum are obtained by reaction between the hydroxyl groups of polygalactomannan and reactive quaternary ammonium compounds. The cationic guar polymer has a weight average molecular weight of 10,000-5,000,000g/mol and a charge density of about 0.05 to about 2.5 meq/g; preferably, the cationic guar polymer has a weight average molecular weight of 15,000-2,500,000g/mol, more preferably 200,000-1,500,000 g/mol; and a charge density of 0.2 to 2.2meq/g, or 0.3 to 2.0meq/g, or 0.4 to 1.8 meq/g. Suitable cationic guar polymers include cationic guar derivatives such as guar hydroxypropyltrimonium chloride. In some embodiments, the cationic guar polymer is guar hydroxypropyltrimonium chloride. Specific examples of guar hydroxypropyltrimonium chloride include those commercially available from Rhone-Poulenc IncorporatedAnd (4) series. Other suitable guar hydroxypropyltrimonium chlorides are: Hi-Care1000 having a charge density of about 0.7meq/g, a molecular weight of 600,000g/mol, and optionally Rhobtaining odia; N-Hance 3269 and N-Hance 3270, having a charge density of about 0.7meq/g and a molecular weight of about 425,000g/mol, are available from ASI. AquaCat CG518 has a charge density of 0.9meq/g, a molecular weight of 50,000g/mol, and is available from ASI.

According to any embodiment of the present invention, one suitable cationic conditioning polymer may be a water-soluble cationic modified starch polymer. The term "cationically modified starch" as used herein refers to starches in which cationic groups are added before the starch degrades to a smaller molecular weight, or in which cationic groups are added after the starch is modified to achieve a desired molecular weight. The term "cationically modified starch" is also defined to include amphiphilically modified starches. The term "amphiphilically modified starch" refers to a starch hydrolysate to which cationic and anionic groups have been added.

The cationic modified starch polymers useful in the personal wash compositions of the present invention have a molecular weight of from about 850,000 to about 15,000,000 and/or from about 900,000 to about 5,000,000. The cationic modified starch polymers useful in the present invention have a charge density of from 0.2 to about 5meq/g, preferably from about 0.2 to about 2 meq/g.

One suitable type of cationic polysaccharide of the present invention is cationic cellulose, such as the salt of hydroxyethyl cellulose reacted with trimethylammonium substituted epoxide, referred to in the industry (CTFA) as polyquaternium 10. Another class of cationic celluloses includes the polymeric quaternary ammonium salts of hydroxyethyl cellulose reacted with lauryl dimethyl ammonium-substituted epoxide, referred to in the industry (CTFA) as polyquaternary ammonium salts 24. Other suitable types of cationic cellulose include the polymeric quaternary ammonium salts of hydroxyethyl cellulose reacted with lauryl dimethyl ammonium-substituted epoxide and trimethyl ammonium-substituted epoxide, known in the industry (CTFA) as polyquaternary ammonium salt 67.

Cationic conditioning polymers are generally present in the compositions of the present invention at a level of from 0.01 to 10 wt%, preferably from 0.05 to 5 wt%, more preferably from 0.1 to 2 wt%, based on the total weight of the composition.

Benefit agent

The personal wash compositions of the present invention comprise one or more benefit agents that provide a positive and/or beneficial effect to the substrate being cleaned, such as hair and skin. The skilled person will be able to select such optional ingredients as are suitable for the purpose of use, based on common general knowledge in the art of formulating personal care compositions such as shampoos, shower gels and liquid hand soaps, and the large body of literature relevant therein. In one embodiment, the compositions of the present invention further comprise one or more benefit agents, such as emollients, moisturizers, conditioners, skin or hair conditioners, such as silicones, e.g. volatile silicones, gums or oils, or non-amino silicones and mixtures thereof, mineral oils, esters including butyl myristate, cetyl palmitate, decyl oleate, glyceryl laurate, glyceryl ricinoleate, glyceryl stearate, glyceryl isostearate, hexyl laurate, isobutyl palmitate, isocetyl stearate, isopropyl isostearate, isopropyl laurate, isopropyl linoleate, isopropyl myristate, isopropyl palmitate, isopropyl stearate, propylene glycol monolaurate, propylene glycol ricinoleate, propylene glycol stearate and propylene glycol isostearate, animal fats including acetylated lanolin alcohol, and mixtures thereof, Lanolin, lard, mink oil and tallow, as well as fatty acids and alcohols, including behenic acid, palmitic acid, stearic acid, behenyl alcohol, cetyl alcohol, eicosanol, and isocetyl alcohol; vitamins or derivatives thereof, such as B-complex vitamins including thiamine, niacin, biotin, pantothenic acid, choline, riboflavin, vitamin B6, vitamin B12, pyridoxine, inositol, carnitine, vitamin A, C, D, E, K and derivatives thereof, such as vitamin a palmitate, and provitamins, such as panthenol (provitamin B5), panthenyl triacetate, and mixtures thereof; an antioxidant; a free radical scavenger; natural or synthetic abrasives; a dye; a hair dye; a bleaching agent; a hair bleach; UV absorbers such as benzophenone, polynitrone, PABA (p-aminobenzoic acid), butyl PABA, cinnamamidopropyl trimethyl ammonium chloride, disodium distyrylbiphenyl sulfonate, potassium methoxycinnamate; anti-UV agents, for example butyl methoxydibenzoylmethane, octyl methoxycinnamate, oxybenzone, 2-ethylhexyl 2-cyano-3, 3-diphenylacrylate, octyl salicylate, phenylbenzimidazole sulfonic acid, ethyl hydroxypropylaminobenzoate, menthyl anthranilate, aminobenzoic acid, cinnamic ether ester, diethanolamine methoxycinnamate, glyceryl aminobenzoate, titanium dioxide, zinc oxide, oxybenzone, octyl dimethyl PABA (Padimate O), red petrolatum; an antimicrobial agent; antibacterial agents such as bacitracin, erythromycin, triclosan, neomycin, tetracycline, chlortetracycline, benzethonium chloride, phenol, Parachlorometaxylenol (PCMX), Triclocarban (TCC), chlorhexidine gluconate (CHG), zinc pyrithione, selenium sulfide; an antifungal agent; a melanin regulating agent; a tanning accelerator; depigmenting agents, for example retinoids such as retinol, kojic acid and its derivatives such as kojic acid dipalmitate, hydroquinone and its derivatives such as arbutin, tranexamic acid, vitamins such as nicotinic acid, vitamin C and its derivatives, azelaic acid, placentin, licorice, extracts such as chamomile and green tea, with retinol, kojic acid and hydroquinone being preferred; skin lightening agents such as hydroquinone, catechol and derivatives thereof, ascorbic acid and derivatives thereof; skin colorants such as dihydroxyacetone; a lipid modulating agent; a weight-loss agent; an anti-acne agent; an anti-seborrheic agent; an anti-aging agent; an anti-wrinkle agent; a keratolytic agent; an anti-inflammatory agent; anti-acne agents, for example tretinoin, isotretinoin, motretinide, adapalene, tazarotene, azelaic acid, retinol, salicylic acid, benzoyl peroxide, resorcinol, antibiotics such as tetracycline and its isomers, erythromycin, anti-inflammatory agents such as ibuprofen, naproxen, Hetrophen, plant extracts such as Alnus japonica, Arnica montana, Artemisia capillaris, Asarum sieboldii, calendula officinalis, Chamomilla nobilis, Nidium, Lithospermum erythrorhizon, Foeniculum vulgare, Galla chinensis, Crataegus pinnatifida, Hypericum, Zizyphus, Actinidia, Glycyrrhiza glabra, Magnoliaceae, Olive, peppermint, Oryctoloma, Sage officinalis, Sasa albo, imidazoles such as ketoconazole and neoconazole; a freshener; cicatrizing agents; a vascular protectant; agents for reducing dandruff (antidandruff agents), agents for reducing seborrheic dermatitis or psoriasis, for example pyrithione salts formed from heavy metals such as zinc, tin, cadmium, magnesium aluminium, sodium and zirconium, for example zinc pyrithione, shale oil and derivatives thereof such as sulfonated shale oil, selenium sulphide, sulphur, salicylic acid, coal tar, povidone iodine, imidazoles such as ketoconazole, dichlorophenyl imidazoldioxirane, clotrimazole, itraconazole, miconazole, climbazole, tioconazole, clotrimazole, butoconazole, fluconazole, miconazole nitrite and any possible stereoisomers and derivatives thereof such as anthralin, piroctonolamine (Octopirox), selenium sulphide, ciclopirox olamine, anti-psoriasis agents such as vitamin D analogues, for example calcipotriol, calcitriol and tacalcitol, vitamin a analogues such as esters of vitamin a, including vitamin a palmitate, vitamin a sodium sulphate, vitamin b, Retinoic acid, retinol and retinoic acid, corticosteroids such as hydrocortisone, clobetasone, butyrate, clobetasol propionate; antiperspirants or deodorants, such as aluminum chlorohydrate, aluminum zirconium chlorohydrate; an immunomodulator; a nutritional agent; depilatories, such as calcium thioglycolate, magnesium thioglycolate, potassium thioglycolate, strontium thioglycolate; an anti-alopecia agent; reducing agents for permanent wave; reflecting agents such as mica, alumina, calcium silicate, ethylene glycol dioleate, ethylene glycol distearate, silica, sodium magnesium fluorosilicate; essential oils and spices.

In some embodiments, the present invention provides, inter alia, a personal wash composition with enhanced deposition of benefit agents. The benefit agent is selected from insoluble or partially insoluble ingredients such as moisturizers or conditioners, vitamins, vitamin derivatives, hair dyes, silicas, pearlescers, anti-UV agents, anti-wrinkle agents, anti-aging agents, antiperspirants, deodorants, abrasives, perfumes or essential oils, skin colorants, anti-microbial agents, anti-dandruff agents, which are applied to a substrate such as hair and/or skin. In still other embodiments, the present invention more particularly provides a personal wash composition having enhanced deposition of benefit agents dispersed in the composition and having a small particle size. Small particles of benefit agents used in personal wash compositions typically have an average particle size of from about 0.01 to about 400 μm, preferably from about 0.01 to about 200 μm, more preferably from about 0.01 to about 100 μm, still more preferably from about 0.01 to about 50 μm, still more preferably from about 0.01 to about 25 μm. One example of the present invention includes an anti-dandruff agent, which may be an anti-dandruff active particulate. In some embodiments, the antidandruff agent is selected from pyrithione salts; zinc carbonate; azoles such as ketoconazole, econazole and neoconazole; selenium sulfide; particulate sulfur; keratolytic agents, such as salicylic acid; and mixtures thereof. In one embodiment, the antidandruff agent is a pyrithione salt.

According to any of the embodiments of the present invention, the personal wash composition comprises from about 0.05 to 80 wt%, preferably from 0.1 to 40 wt%, more preferably from 0.5 to 20 wt% benefit agent, based on the total weight of the composition.

According to any of the embodiments of the present invention, the personal wash composition further comprises a carrier or a mixture of such carriers, which is suitable for application to the skin and/or hair. Suitable carriers for skin and/or hair cleansing compositions include water, C₁-C₆Alcohols, lower alkyl acetates and mixtures thereof. In some embodiments, the carrier may also comprise a wide range of other materials, such as acetone, hydrocarbons such as isobutane, hexane, decene, halogenated hydrocarbons, and volatile siloxanes such as cyclic polydimethylsiloxanes. The carrier is present in the personal wash compositions of the present invention in an amount of from about 0.5 to about 99 wt%, preferably from about 5 to about 99 wt%, more preferably from about 10 to about 98 wt%, based on the total weight of the composition.

In some preferred embodiments of the invention, the composition comprises:

a) a detersive surfactant selected from the group consisting of anionic surfactants, amphoteric surfactants, zwitterionic surfactants, and combinations thereof,

b) at least one rheology modifying polymer which is an associative rheology modifying polymer selected from hydrophobically modified alkali swellable and alkali soluble emulsion polymers; a hydrophobically modified ethylene oxide urethane polymer; a hydrophobically modified polyether; hydrophobically modified hydroxyethyl cellulose polymers, hydrophobically modified hydroxypropyl guar polymers, and mixtures thereof; preferably, the associative rheology modifying polymer is a hydrophobically modified alkali swellable and alkali soluble emulsion polymer; more preferably, the hydrophobically modified alkali-swellable and alkali-soluble emulsion polymer is a hydrophobically modified poly (meth) acrylate prepared by copolymerizing a mixture of a (meth) acrylic monomer and a hydrophobic comonomer,

c) at least one cationic conditioning polymer selected from the group consisting of cationic polysaccharides and polymers comprising cationic vinyl monomers, such as cationic guar derivatives, cationic cellulose derivatives, cationic starch derivatives, homopolymers and copolymers of dimethyldiallylammonium chloride (DMDAAC), homopolymers and copolymers of methacrylamidopropyltrimethylammonium chloride (MAPTAC), homopolymers and copolymers of acrylamidopropyltrimethylammonium chloride (APTAC), homopolymers and copolymers of methacryloyloxyethyltrimethylammonium chloride (METAC), homopolymers and copolymers of acryloxyethyltrimethylammonium chloride (AETAC), homopolymers and copolymers of methacryloyloxyethyltrimethylammonium methyl sulfate (METAMS), and combinations thereof; preferably, the cationic conditioning polymer is a cationic guar derivative, a cationic cellulose derivative or a cationic starch derivative;

d) an effective amount of at least one benefit agent to condition hair or skin, wherein the benefit agent is selected from insoluble or partially insoluble ingredients such as moisturizers or conditioners, vitamins, vitamin derivatives, hair dyes, silica, pearlescers, anti-UV agents, anti-wrinkle agents, anti-aging agents, antiperspirants, deodorants, abrasives, perfumes or essential oils, skin colorants, anti-microbial agents, and anti-dandruff agents; preferably, the benefit agent has small particles dispersed in the composition; more preferably, the benefit agent is an antidandruff agent; still more preferably, the antidandruff agent is selected from pyridinethione salts; zinc carbonate; azoles such as ketoconazole, econazole and neoconazole; selenium sulfide; particulate sulfur; keratolytic agents, such as salicylic acid; and mixtures thereof;

e) an anionic polymer of polysulfonic acid comprising at least one monomer having ethylenic unsaturation with a sulfonic acid group, wherein said monomer is selected from the group consisting of 1-acrylamido-1-propanesulfonic acid, 2-acrylamido-2-methyl-1-propanesulfonic acid, 2-methacrylamido-2-methyl-1-propanesulfonic acid, 3-methacrylamido-2-hydroxypropanesulfonic acid, allylsulfonic acid, methallylsulfonic acid, allyloxybenzenesulfonic acid, methallyloxybenzenesulfonic acid, 2-hydroxy-3- (2-propenyloxy) propanesulfonic acid, 2-methyl-2-propene-1-sulfonic acid, styrenesulfonic acid, mixtures thereof, and mixtures thereof, Benzenesulfonic acid, toluenesulfonic acid or naphthalenesulfonic acid, benzenedisulfonic acid or naphthalenedisulfonic acid, alkylated benzenesulfonic acid or naphthalenesulfonic acid, vinylsulfonic acid, 3-sulfopropyl acrylate, 3-sulfopropyl methacrylate, sulfomethacrylamide, sulfomethylmethacrylamide, and mixtures thereof; preferably, the polysulfonic acid is a homopolymer of acrylamido-2-methylpropanesulfonate, a copolymer of acrylamido-2-methylpropanesulfonate;

f) a cosmetically acceptable carrier;

in particular, sulfate-free or substantially sulfate-free compositions are preferred.

According to any of the embodiments of the present invention, the personal wash composition is used in a manner known in the art, for example, in the case of a cleanser or shampoo, by applying the cleanser or shampoo to the skin and/or hair, and optionally rinsing the cleanser or shampoo from the skin and/or hair with water. The personal wash compositions of the present invention may have a pH of from 4 to 11, for example from 4 to 6.

The personal wash compositions of the present invention may be prepared by mixing the components using any conventional blending technique known in the art, such as conventional stirring, shaking or tumbling. These components may be provided as concentrated solutions, diluted and/or combined in appropriate proportions by one skilled in the art. The present invention encompasses any concentrate used as a component ingredient to prepare the compositions of the present invention, especially concentrates that contain limited levels of water for several reasons in terms of cost and environment.

In another aspect, the present invention relates to a method of achieving improved conditioning benefits comprising applying the personal wash composition to the skin and/or hair.

In yet another aspect, the present invention relates to a method of achieving improved deposition of hair and/or skin care benefit agents on hair and/or skin comprising applying the personal wash composition to the skin and/or hair. In yet another aspect, the present invention relates to a method of achieving improved deposition of hair and/or skin care benefit agents dispersed in a composition and having a small particle size, the method comprising applying the personal wash composition to the skin and/or hair. In particular, the personal wash composition is a sulfate-free or substantially sulfate-free composition.

In another aspect, the present invention relates to the use of personal wash compositions to care for and wash keratin materials such as hair and skin.

Examples

It is to be understood that the invention is not limited to the specifically disclosed and illustrated embodiments herein. Various modifications of the invention will be apparent to those skilled in the art. Such changes and modifications may be made without departing from the scope of the appended claims.

The invention will now be described in further detail by way of the following non-limiting examples, wherein the abbreviations have the usual meaning in the art. Temperatures are expressed in degrees Celsius (C.) and other parameters are expressed in respective passage units. The amount of water denoted "q.s." is intended to be the "amount required to make up to 100%".

Evaluation method

Molecular weight measurement

The average molecular weight (Mw) of the polymer was determined by Gel Permeation Chromatography (GPC) using a TSKgel GMPWXL13 μ M2, 300X 7.8mm column containing 0.01M phosphate buffer and 0.1M NaCl in water as eluent. The concentration of the polymer was determined by a refractive index detector and the molecular weight was calibrated with poly (acrylic acid) -Na salt standards.

Coacervate weight measurement

Coacervate weight was measured using the coacervate centrifugation test. In this test, the shampoo composition was diluted 1:9 with tap water. The diluted composition was slowly mixed for at least 2 hours and then centrifuged at 3500rpm for 20 minutes. The supernatant phase (top phase) was then removed and the weight of the coacervate phase (bottom phase) was measured (25 ℃, 50% RH).

Combing force measurement

Physical measurement of combing force on a strand of hair enables objective measurement of how well products such as shampoos or hair conditioners perform in terms of conditioning and detangling efficacy. In the front and back designs, the reduction in wet or dry combing force was determined to demonstrate efficacy.

Prior to measurement, the hair tresses were disentangled until no loops or curls of hair remained. Next, the hair strands are placed in a jig and combed into a test comb as part of a tensile tester. The combing force reduction is given as a percentage and is calculated from the force ratio between the processed sample value and the blank value (unprocessed sample). Each formulation was tested with 5 tresses using wet and dry combing equipment. For the wet combing test, 1g of hair tresses with a length of 12cm were used, and for the dry combing test, 2g of hair tresses with a length of 15cm were used.

The first step in studying dry combing is to prepare the hair tresses to determine the reference value. The preparation involved equilibrating the tresses for 12 hours at room temperature of 23 ℃ and 50% relative humidity. Reference measurements are then made. The tresses were treated with 0.25g of the corresponding washing formulation per 1g of hair and incubated for 5 minutes. The tresses were then rinsed thoroughly with tap water for about 1 minute at room temperature. This treatment with the washing formulation is repeated. The hair tresses were dried and the dried tresses were equilibrated under the conditions given above. Combing measurements were then performed.

The conditioning performance of the respective wash formulations was evaluated by measuring the reduction in work or energy associated with the combing of the tresses. Combing force was measured with a Zwicki Z2.5 dynamic tester (Zwick Roell, germany) before and after treatment with the test formulations described above. The percent change in carding work reduction was then calculated as the ratio of the difference between the post-treatment and pre-treatment carding work to the pre-treatment carding work, as shown below. Thus, negative values indicate a reduction in combing work due to treatment (conditioning), while positive values indicate an increase in combing work due to treatment. The recorded force-displacement curves were integrated to calculate the combing work.

The residual combing work was calculated as follows:

residual combing work ═ (combing work after treatment)/(combing work before treatment)

Change in carding work (%) - (treated-untreated) × 100

Zinc Pyrithione (ZPT) deposition measurement

Zinc pyrithione deposition was measured by emission spectroscopy using inductively coupled plasma testing (ICP-OES). Each formulation (0.5g) and water (2.5g) combination was applied to a 4cm x 4cm VitroSkin substrate for 30 seconds to simulate a consumer's normal application of shampoo to the scalp. Rinsed off after application. The VitroSkin was allowed to dry naturally overnight.

The treated vitrosukin was weighed into microwave PTFE containers and 10mL of nitric acid (65%) was added to each container. Microwave-assisted acid hydrolysis (Anton Paar Multiwave Pro) was performed on the samples using the following procedure.

Phases	Power (V)	Ascending (min)	Keep (min)
				1	350	10	0
2	350	0	5
				3	700	10	0
4	700	0	60
				5	0	0	30

The hydrolyzed sample was transferred to a sample tube and then diluted to a final volume of 50mL (with deionized water) before ICP-OES (Perkin Elmer Optima 8000DV) analysis.

VitroSkin is an artificial substrate that is used in our deposition studies to mimic the surface properties of human skin. It contains optimized protein and lipid components and is designed to have a morphology, pH, critical surface tension and ionic strength similar to human skin.

In the following examples, all parts and percentages are by weight unless otherwise indicated. Coacervate gravimetric formulation and results

The results of the personal wash formulation and coacervate formation are shown in table 1 below.

TABLE 1

¹: JR-30M, commercially available from Dow Chemical, Mw 1,500,000-;

²: jaguar Excel, commercially available from Solvay, Mw ═ 1,500,000 g/mol;

³: arlypon TT, PEG/PPG-120/10 trimethylolpropane trioleate (and) laureth (2) ether sold by BASF;

⁴: rheocare TTA, (polymer of 2-methyl-2-acrylic acid with butyl 2-acrylate and ethyl 2-acrylate), commercially available from BASFObtaining;

⁵: rheocare HSP 1180, commercially available from BASF, Mw of 1,620,000 g/mol; the charge density is 4.8 meq/g;

⁶: acrylic Acid (AA) -acrylamidomethylpropanesulfonic Acid (AMPS) copolymers are prepared by conventional polymerization techniques well known to those skilled in the art. Mw 36,750 g/mol; the charge density is 2.3 meq/g;

⁷: acrylic Acid (AA) -acrylamidomethylpropanesulfonic Acid (AMPS) copolymers are prepared by conventional polymerization techniques well known to those skilled in the art. Mw 37,770g/mol, charge density 3.6 meq/g;

⁸: acrylic Acid (AA) -acrylamidomethylpropanesulfonic Acid (AMPS) copolymers are prepared by conventional polymerization techniques well known to those skilled in the art. Mw is 39,360g/mol, charge density is 4.3 meq/g.

Coacervate formation was observed in formulations a and B comprising the sulfate-free surfactant composition and the cationic conditioning polymer. The rheology-modified polymer was added in formulations A-0 and B-0 without coacervate formation. Formulations A-1, A-2, A-3, A-4, A-5, A-6, B-1 and B-2, which further comprise additional polysulfonic anion (co) polymers, make it possible to form more coacervates.

Formulation and results of combing force measurements

The results for the personal wash formulation and residual combing force are shown in table 2.

TABLE 2

¹: JR-30M, commercially available from Dow Chemical, Mw 1,500,000-;

²: rheocoke TTA, commercially available from BASF;

³: AA, AMPS is 3:1, Mw is 19,700g/mol, and charge density is 2.3 meq/g;

⁴：CleanBio^TM-Zinc, commercially available from Kolon.

Formulation C-0, with the addition of the rheology-modifying polymer, exhibited higher residual combing force values than formulation C (which included the cationic polymer and the sulfate-free surfactant composition, but which did not include any additional rheology-modifying polymer), due to less coagulum formation and poor deposition of conditioning ingredients. Formulations C-1, C-2 and C-3 showed lower residual combing force, which means improved coacervate formation and conditioning ingredient deposition.

Formulation and results of zinc deposition measurements

Personal wash formulations and Zn deposition results are shown in table 3.

TABLE 3

¹: JR-30M, commercially available from Dow Chemical, Mw 1,500,000-;

²: rheocoke TTA, commercially available from BASF;

³: rheocare HSP 1180, commercially available from BASF, Mw of 1,620,000 g/mol; the charge density is 4.8 meq/g;

⁴: linear polyacrylic acid, Mw ═ 10,300 g/mol;

⁵：CleanBio^TM-Zinc, commercially available from Kolon.

Formulations D-1 and D-2 with the addition of polysulfonic acid (co) polymer showed higher amounts of ZPT deposits compared to formulation D, which contained sulfate-free surfactant composition, cationic conditioning polymer, rheology modifying polymer and ZPT, which did not include anionic (co) polymer of polysulfonic acid. However, formulation D-3, with the addition of other types of anionic polymers, which do not contain unsaturated monomers with sulfonic acid groups, does not result in enhanced ZPT deposition.