HK1196774A

HK1196774A - Method of achieving improved hair feel

Info

Publication number: HK1196774A
Application number: HK14110245.6A
Authority: HK
Inventors: E.S.约翰逊; J．A．施陶迪格尔; S．M．雷诺克; B.A.舒伯特; M．W．黑姆斯基
Original assignee: 宝洁公司
Priority date: 2011-10-07
Filing date: 2012-10-05
Publication date: 2014-12-24

Description

Method for obtaining improved hair feel

Technical Field

A method of obtaining improved hair feel, the method comprising applying to hair a composition comprising: (a) specific cationic guar polymers; (b) a specific cationic copolymer; (c) an anti-dandruff active; (d) a cosmetically acceptable carrier; (e) a surfactant; wherein the weight ratio of (a) to (b) is from about 1000:1 to about 3.5: 1; and wherein the sum of (a) + (b) is in an amount of about 0.0001% to about 0.7% by total weight of the composition; wherein upon dilution of the composition with water, the composition forms coacervate particles; and wherein the coacervate particles have a squeeze flow viscosity of from about 1cP to about 100 cP; and wherein the percentage of coacervate particles with a floc size of greater than about 20 microns is from about 1% to about 60%; and wherein the on-scalp deposition of the anti-dandruff active is at least about 1 μ g/cm²。

Background

Conditioning shampoos or "2 in 1" hair products comprising a detersive surfactant and a hair conditioner are known. These personal care compositions typically comprise a combination of anionic detersive surfactant and conditioning agents such as silicones, hydrocarbon oils, fatty acid esters and the like. These products have become increasingly popular among consumers as a means of conveniently achieving hair conditioning and cleansing performance from a single product.

However, many conditioning personal care compositions do not provide adequate deposition of conditioning agents to the hair or skin during the application process, and if deposition is possible, the only possibility is that the formulation has a lower level of anionic surfactant. If there is insufficient deposition, most of the conditioning agent is washed away during the application process, providing little or no conditioning benefit. Higher levels of conditioning agent may be required if there is insufficient deposition of conditioning agent on the hair or skin. However, such high levels of conditioning agents can increase raw material costs, reduce lather performance, and present product stability issues. Furthermore, the limitation of total anionic surfactant to form coacervates can limit the foam potential of the composition or result in the need for higher levels of more expensive amphoteric surfactants to obtain good foam.

One known method of improving the deposition of hair conditioning agents onto hair involves the use of specific cationic deposition polymers. These polymers may be synthetic, but most often are natural fiber or guar polymers that have been modified with cationic substituents.

The formation of coacervates upon dilution of the cleansing composition with water is important for improving deposition of a variety of conditioning actives, especially those having small droplet sizes (i.e.. ltoreq.2 microns). To form coacervates, cleaning compositions comprising typical cationic polymers tend to significantly limit the total anionic concentration to achieve sufficient coacervate content upon dilution, but this will limit the available foam volume of a particular cleaning composition. Therefore, for cost effective, high foaming, coacervate forming compositions, it is desirable to use cationic polymers that can form coacervates in the presence of high levels of anionic surfactant. Another complication arises when the composition contains an anti-dandruff active that is also required to deposit on the scalp in an effective deposition amount and quality. However, by using, for example, high levels of cationic polymers and those with higher charge densities, excellent deposition amounts and quality of anti-dandruff actives are often associated with hair conditioning sensations found to be unacceptable by many consumers.

Thus, there is a need for conditioning anti-dandruff compositions that provide excellent anti-dandruff deposition performance without compromising hair conditioning and hair feel.

Disclosure of Invention

According to a first aspect, the present invention relates to a method of obtaining improved hair feel, said method comprising applying to the hair a composition comprising:

(a) a cationic guar polymer, wherein the cationic guar polymer has a weight average molecular weight of less than about 1,000,000g/mol, and wherein the cationic guar polymer has a charge density of about 0.1meq/g to about 2.5 meq/g;

(b) a cationic copolymer of an acrylamide monomer and a cationic monomer, wherein the copolymer has a charge density of about 1.0meq/g to about 3.0 meq/g;

(c) an anti-dandruff active;

(d) a cosmetically acceptable carrier;

(e) a surfactant;

wherein the weight ratio of (a) to (b) is from about 1000:1 to about 3.5: 1;

and wherein the sum of (a) + (b) is in an amount of about 0.0001% to about 0.7% by total weight of the composition;

wherein upon dilution of the composition with water, the composition forms coacervate particles;

and wherein the coacervate particles have a squeeze flow viscosity of from about 1cP to about 100 cP;

and wherein the percentage of coacervate particles with a floc size of greater than about 20 microns is from about 1% to about 60%;

and wherein the on-scalp deposition of the anti-dandruff active is at least about 1 μ g/cm²。

According to a second aspect, the present invention relates to a hair conditioning composition comprising:

(c) an anti-dandruff active;

(d) a cosmetically acceptable carrier;

(e) a surfactant;

wherein the weight ratio of (a) to (b) is from about 1000:1 to about 3.5: 1;

and wherein the sum of (a) + (b) is in an amount of about 0.0001% to about 0.7% by total weight of the composition.

According to a third aspect, the present invention relates to the use of a composition according to the second aspect for treating hair.

According to a fourth aspect, the present invention relates to a kit comprising:

(a) instructions for administration, said instructions for administration comprising a method according to the first aspect; and

(b) a composition is provided.

Drawings

Axis X of fig. 1: 100s^-1Lower coacervate squeeze flow viscosity in centipoise. Axis Y: a percentage of coacervate particles having a floc size greater than about 20 microns. The circle size corresponds to the average consumer acceptance score (larger size equates to higher acceptance score). The white filled circles represent compositions having coacervate particle properties resulting in an average consumer acceptance score of 60 or greater, having less than 0.7% of the sum of (a) + (b) in a ratio of (a) to (b) ranging from about 1000:1 to about 3.5:1, and having greater than 1 μ g/cm²The scalp of (1) anti-dandruff active deposition. The light gray filled circles represent compositions less than 0.7% beyond "(a) + (b). Circles filled in dark gray and black represent compositions outside the ratio of (a) to (b) of 1000:1 to 3.5: 1.

Detailed Description

All percentages are based on the total weight of the composition, unless otherwise indicated. All ratios are by weight unless otherwise specifically indicated. All ranges are inclusive and combinable. The number of significant figures does not represent a limitation on the indicated amount nor on the accuracy of the measurement. As used herein, the term "molecular weight" or "m.wt." refers to weight average molecular weight, unless otherwise indicated. "QS" means a sufficient amount to 100%.

Unless otherwise specifically stated, all numerical values should be understood as being modified by the word "about". Unless otherwise indicated, all measurements are understood to be made at 25 ℃ and at ambient conditions, where "ambient conditions" refers to conditions at about one atmosphere of pressure and at about 50% relative humidity. All such weights as they pertain to listed ingredients are based on the active level and do not include carriers or by-products that may be included in commercially available materials, unless otherwise specified.

Herein, "comprising" means that other steps and other ingredients which do not affect the end result can be added. The term encompasses the terms "consisting of …" and "consisting essentially of …". The compositions, methods, uses, kits, and processes of the present invention may comprise, consist of, and consist essentially of the elements and limitations of the present invention described herein, as well as any additional or optional ingredients, components, steps, or limitations described herein.

As used herein, the term "substantially free" or "substantially free" means less than about 1%, or less than about 0.8%, or less than about 0.5%, or less than about 0.3%, or about 0%, by total weight of the composition.

As used herein, "hair" refers to mammalian hair, including scalp hair, facial hair, and body hair, especially hair on the human head and scalp.

As used herein, "cosmetically acceptable" means that the composition, formulation, or component is suitable for use in contact with human keratinous tissue without undue toxicity, incompatibility, instability, allergic response, and the like. All compositions described herein with the purpose of direct application to keratinous tissue are limited to those that are cosmetically acceptable.

As used herein, "derivatives" include, but are not limited to, amide, ether, ester, amino, carboxyl, acetyl, acid, salt, and/or alcohol derivatives of a given compound.

As used herein, "polymer" refers to a chemical substance formed from the polymerization of two or more monomers. As used herein, the term "polymer" shall include all materials made from the polymerization of monomers as well as natural polymers. Polymers made from only one type of monomer are referred to as homopolymers. The polymer comprises at least two monomers. Polymers made from two or more different types of monomers are known as copolymers. The distribution of the different monomers can be calculated statistically or in blocks-both possibilities are applicable to the present invention. The term "polymer" as used herein, unless otherwise indicated, includes any type of polymer, including homopolymers and copolymers.

As used herein, "kit" refers to a packaging unit containing a plurality of components. Examples of kits are e.g. a first composition and a separately packaged second composition. Another kit may comprise a first composition and an energy delivery device. Different kits may contain three different types of separately packaged compositions and hair styling tools. Other kits may include instructions for administration including the methods and compositions/formulations.

As used herein, the term "coacervate" refers to a complex formed between a surfactant and a polymer, which complex is soluble or insoluble in the pure composition in which it typically forms an insoluble complex, and which upon dilution may become less soluble, resulting in an increased level of phase separation or precipitation thereof in solution.

As used herein, the term "floe" refers to a localized mass of agglomerated insoluble coacervate, which can comprise a polymer, a surfactant, water, and a dispersed phase present in the composition, such as an anti-dandruff active and a silicone emulsion. Any of the floc sizes disclosed herein were obtained using the Lasentec FBRM method described below.

As used herein, the term "isotropic" refers to a particular phase structure of a coacervate, wherein the structure "is the same in any three spatially orthogonal directions, and is therefore dark or 'non-birefringent' when viewed between cross-polarized light. (if The vector component of The first direction in The second direction is zero, one direction is 'orthogonal' to The other direction) "(Laughlin, R.G. (1994)" The Aqueous Phase of weights of Surfactants ", 182, 8.2).

As used herein, the term "charge density" refers to the ratio of the number of positive charges on a monomeric unit (constituting a polymer) to the monomeric unit m.wt. The charge density multiplied by the polymer m.wt. determines the number of positively charged sites on a given polymer chain. For cationic guar, charge density was measured using a nitrogen percentage standard elemental analysis known to those skilled in the art. This percentage nitrogen value, corrected for total protein analysis, can then be used to calculate the number of positive charges or equivalents per gram of polymer. For cationic copolymers, the charge density is a function of the monomers used in the synthesis. Standard NMR techniques known to those skilled in the art will be used to confirm the ratio of cationic to nonionic monomers in the polymer. This will then be used to calculate the number of positive charges or equivalents per gram of polymer. After these values are known, the charge density is reported in milliequivalents (meq)/gram of cationic polymer.

As used herein, the term "(meth) acrylamide" refers to methacrylamide or acrylamide. As used herein, the term "(meth) acrylic" refers to either acrylic or methacrylic.

It has been surprisingly found that by formulating a specific cationic guar polymer at a specific level and ratio with a specific cationic copolymer of acrylamide monomer and cationic monomer, anti-dandruff active deposition can be improved with minimal or no consumer unacceptable levels of hair conditioning and hair feel.

Without being bound by theory, the present inventors have discovered that a lower level of cationic copolymer relative to cationic guar polymer is needed to provide improved hair conditioning and hair feel consumer acceptance, but still provide excellent on-scalp anti-dandruff active deposition-such excellent on-scalp anti-dandruff active deposition is associated with anti-dandruff active anti-dandruff efficacy. Cationic guar gums provide coacervates with very desirable coacervate floc size and coacervate rheology performance properties, which are very desirable because these properties are associated with consumer acceptance of the resulting hair conditioning and hair feel. Certain cationic guars provide acceptable consumer hair feel, but may be ineffective in depositing anti-dandruff actives. It has been shown that by increasing the m.wt. of cationic guar, more effective deposition of the antidandruff agent onto the scalp can be achieved, but this also results in a larger size of the coacervate floc. When applied to hair, the larger coacervate flocs become trapped in the hair, which in turn leads to a less acceptable hair feel. However, the cationic copolymer forms a coacervate that is very effective in depositing the anti-dandruff active on the scalp, but results in a coacervate floc size and rheological properties that render the hair feel unacceptable to consumers. By providing compositions comprising a particular cationic guar and a particular cationic copolymer in the ratios and amounts defined herein, it has been surprisingly found that the consumer-desired benefits provided by lower m.wt. cationic guar and enhanced cationic copolymer deposition can be achieved in a single composition, while still retaining a high consumer acceptance of hair conditioning performance and hair feel.

Features of the method according to the first aspect, as well as other aspects and other related components, are described in detail below. All components of the compositions described herein should be physically and chemically compatible with the essential components described herein, and should not unduly impair product stability, aesthetics or performance.

The composition comprises (a) a cationic guar polymer, wherein the cationic guar polymer has a weight average m.wt. of less than about 1,000,000g/mol, and wherein the cationic guar polymer has a charge density of from about 0.1meq/g to about 2.5 meq/g. Further, the sum of (a) + (b) is in an amount of about 0.0001% to about 0.7% by total weight of the composition. The cationic guar polymer is a cationically substituted galactomannan (guar) gum derivative. The guar used to prepare these guar derivatives is typically obtained as a naturally occurring material derived from the seed of the guar plant. The guar molecule itself is a linear mannan, which is branched at regular intervals, with single-membered galactose units on alternating mannose units. The mannose units are linked to each other via a β (1-4) glycosidic bond. Galactose branching occurs via the alpha (1-6) linkage. Cationic derivatives of guar gum are obtained by reaction between the hydroxyl groups of polygalactomannan and reactive quaternary ammonium compounds. The degree of substitution of the cationic groups on the guar structure must be sufficient to provide the desired cationic charge density as described above.

In one embodiment, the cationic guar polymer has a weight average m.wt. of less than 900,000g/mol, or from about 150,000 to about 800,000g/mol, or from about 200,000 to about 700,000g/mol, or from about 300,000 to about 700,000g/mol, or from about 400,000 to about 600,000 g/mol.

In one embodiment, the composition comprises from about 0.01% to about 0.7%, or from about 0.04% to about 0.55%, or from about 0.08% to about 0.5%, or from about 0.16% to about 0.5%, or from about 0.2% to about 0.5%, or from about 0.3% to about 0.5%, or from about 0.4% to about 0.5% of the cationic guar polymer (a), by total weight of the composition.

The cationic guar polymer may be formed from a quaternary ammonium compound. In one embodiment, the quaternary ammonium compound used to form the cationic guar polymer conforms to the general formula:

wherein when R is¹、R²And R³When it is methyl or ethyl, R⁴Is an alkylene oxide group having the general formula:

or R⁴Is a halohydrin group having the general formula:

wherein R is⁵Is C₁-C₃An alkylene group; x is chlorine or bromine and Z is an anion, e.g. Cl-, Br-, I-or HSO₄-。

In one embodiment, the cationic guar polymer conforms to the general formula:

wherein R is guar gum; and wherein R¹、R²、R³And R⁵Is a hydrocarbon containing 1 to 6 carbon atoms; and wherein Z is halogen. In one embodiment, the cationic guar polymer conforms to the formula G:

formula G

Suitable cationic guar polymers include cationic guar derivatives such as guar hydroxypropyltrimonium chloride. In one embodiment, the cationic guar polymer is guar hydroxypropyltrimonium chloride. Specific examples of guar hydroxypropyltrimonium chloride include those commercially available from Rhone-Poulenc IncorporatedSeries, e.g. commercially available from RhodiaC-500。C-500 has a charge density of 0.8meq/g, and an M.Wt. of 500,000 g/mole. Another guar hydroxypropyltrimonium chloride with a charge density of 1.1meq/g and m.wt. of 500,000g/mole was purchased from Ashland. Another guar hydroxypropyltrimonium chloride with a charge density of 1.5meq/g and m.wt. of 500,000g/mole was purchased from Ashland.

C-17 is not suitable as the cationic guar polymer (a) of the present invention.C-17 conforms to formula G and has a cationic charge density of about 0.6meq/G, and an M.Wt. of about 2,200,000G/mol, and is available from Rhodia Company.C13S is also not suitable for use as the cationic guar polymer (a) of the present invention.C13S conforms to formula G and has an M.Wt. of 2,200,000G/mol, and a cationic charge density of 0.8meq/G (available from Rhodia company). In one embodiment, the present invention is substantially free ofC-17 and/orC13S。

Other suitable polymers include: Hi-Care1000 having a charge density of 0.7meq/g and an m.wt. of 600,000g/mole and available from Rhodia; N-Hance3269 and N-Hance3270, which have a charge density of 0.7meq/g, and an M.Wt. of 425,000g/mole, and are available from Ashland; AquaCat CG518 has a charge density of 0.9meq/g, and an m.wt. of 50,000g/mole, and was purchased from Ashland.

The composition comprises (b) a cationic copolymer of an acrylamide monomer and a cationic monomer, wherein the copolymer has a charge density of from about 1.0meq/g to about 3.0 meq/g. Further, the sum of (a) + (b) is in an amount of about 0.0001% to about 0.7% by total weight of the composition. In one embodiment, the cationic copolymer has a synthetic cationic copolymer of acrylamide monomers and cationic monomers.

In one embodiment, the cationic copolymer comprises:

(i) an acrylamide monomer having the formula AM:

formula AM

Wherein R is⁶Is H or C_1-4An alkyl group; and R is⁷And R⁸Independently selected from H, C_1-4Alkyl radical, CH₂OCH₃、CH₂OCH₂CH(CH₃)₂And phenyl, or together are C_3-6A cycloalkyl group; and

(ii) cationic monomers conforming to the formula CM:

formula CM

Wherein k =1, v' and v ″ are each independently an integer from 1 to 6, w is zero or from 1 to 6

10, and X "is an anion.

In one embodiment, the cationic monomer conforms to formula CM, and wherein k =1, v =3 and w =0, z =1 and X "is Cl", to form the following structure:

the above structure may be referred to as a diquaternary ammonium salt. In another embodiment, the cationic monomer corresponds to formula CM, and wherein v and v "are each 3, v' =1, w =1, y =1 and X-is Cl-, such as:

the above structure may be referred to as a tri-quaternary ammonium salt.

In one embodiment, the acrylamide monomer is acrylamide or methacrylamide.

In one embodiment, cationic copolymer (b) is AM: TRIQUAT, which is a copolymer of acrylamide and N- [2- [ [ [ dimethyl [3- [ (2-methyl-1-oxo-2-propenyl) amino ] propyl ] ammonio ] acetyl ] amino ] ethyl ] 2-hydroxy-N, N, N ', N ', N ' -pentamethyl-1, 3-propanediammonium trichloride. TRIQUAT is also known as polyquaternium-76 (PQ 76). TRIQUAT may have a charge density of 1.6meq/g and an M.Wt. of 1,100,000 g/mol.

In an alternative embodiment, the cationic copolymer has an acrylamide monomer and a cationic monomer, wherein the cationic monomer is selected from the group consisting of: dimethylaminoethyl (meth) acrylate, dimethylaminopropyl (meth) acrylate, di-tert-butylaminoethyl (meth) acrylate, dimethylaminomethyl (meth) acrylamide, dimethylaminopropyl (meth) acrylamide; ethyleneimine, vinylamine, 2-vinylpyridine, 4-vinylpyridine; trimethyl (meth) acryloyloxyethylammonium chloride, trimethyl (meth) acryloyloxyethylammonium methyl sulfate, dimethyl ammonium (meth) acryloyloxyethylbenzylammonium chloride, 4-benzoylbenzyl dimethylacryloxyethyl ammonium chloride, trimethyl (meth) acrylamidoethylammonium chloride, trimethyl (meth) acrylamidopropylammonium chloride, vinylbenzyltrimethylammonium chloride, diallyldimethylammonium chloride, and mixtures thereof.

In one embodiment, the cationic copolymer comprises a cationic monomer selected from the group consisting of: cationic monomers include trimethyl (meth) acryloyloxyethyl ammonium chloride, trimethyl (meth) acryloyloxyethyl ammonium methyl sulfate, dimethyl ammonium (meth) acryloyloxyethyl benzyl ammonium chloride, 4-benzoylbenzyl dimethyl acryloyloxyethyl ammonium chloride, trimethyl (meth) acrylamidoethyl ammonium chloride, trimethyl (meth) acrylamidopropyl ammonium chloride, vinylbenzyl trimethyl ammonium chloride, and mixtures thereof.

In one embodiment, the cationic copolymer is water soluble. In one embodiment, the cationic copolymer is formed from a terpolymer of (1) (meth) acrylamide and a cationic (meth) acrylamide-based monomer and/or a hydrolysis-stable cationic monomer, and (2) (meth) acrylamide, a cationic (meth) acrylate-based monomer, and a (meth) acrylamide-based monomer, and/or a hydrolysis-stable cationic monomer. The cationic (meth) acrylate-based monomer may be a cationized ester of (meth) acrylic acid containing a quaternized N atom. In one embodiment, the cationized ester of (meth) acrylic acid containing a quaternized N atom is a quaternized dialkylaminoalkyl (meth) acrylate having C1-C3 in the alkyl and alkylene groups. In one embodiment, the cationic ester of (meth) acrylic acid containing a quaternized N atom is selected from: ammonium salts of dimethylaminomethyl (meth) acrylate, dimethylaminoethyl (meth) acrylate, dimethylaminopropyl (meth) acrylate, diethylaminomethyl (meth) acrylate, diethylaminoethyl (meth) acrylate quaternized with methyl chloride; and ammonium salts of diethylaminopropyl (meth) acrylate. In one embodiment, the cationized ester of (meth) acrylic acid containing a quaternized N atom is dimethylaminoethyl acrylate (ADAME-quaternary) quaternized with an alkyl halide or with methyl or benzyl chloride or dimethyl sulfate. In one embodiment, when based on (meth) acrylamide, the cationic monomer is a quaternized dialkylaminoalkyl (meth) acrylamide having C1-C3 in the alkyl and alkylene groups, or dimethylaminopropyl acrylamide, which is quaternized with an alkyl halide or with methyl or benzyl chloride or dimethyl sulfate.

In one embodiment, the (meth) acrylamide-based cationic monomer is a quaternized dialkylaminoalkyl (meth) acrylamide having C1-C3 in the alkyl and alkylene groups. In one embodiment, the (meth) acrylamide-based cationic monomer is dimethylaminopropyl acrylamide, which is quaternized with an alkyl halide (especially methyl chloride) or benzyl chloride or dimethyl sulfate.

In one embodiment, the cationic monomer is a hydrolytically stable cationic monomer. The hydrolytically stable cationic monomer may also be all monomers that are considered stable by the OECD hydrolysis test, in addition to the dialkylaminoalkyl (meth) acrylamide. In one embodiment, the cationic monomer is hydrolytically stable, and the hydrolytically stable cationic monomer is selected from the group consisting of: diallyl dimethyl ammonium chloride and a water-soluble cationic styrene derivative.

In one embodiment, the cationic copolymer is a terpolymer of acrylamide, 2-dimethylammonioethyl (meth) acrylate quaternized with methyl chloride (ADAME-Q), and 3-dimethylammoniopropyl (meth) acrylamide quaternized with methyl chloride (DIMAPA-Q). In one embodiment, the cationic copolymer is formed from acrylamide and acrylamidopropyltrimethylammonium chloride, wherein the acrylamidopropyltrimethylammonium chloride has a charge density of from about 1.0meq/g to about 3.0 meq/g.

In one embodiment, the cationic copolymer has a charge density of from about 1.1meq/g to about 2.5meq/g, or from about 1.1meq/g to about 2.3meq/g, or from about 1.2meq/g to about 2.2meq/g, or from about 1.2meq/g to about 2.1meq/g, or from about 1.3meq/g to about 2.0meq/g, or from about 1.3meq/g to about 1.9 meq/g.

In one embodiment, the cationic copolymer has an m.wt. of from about 100,000g/mol to about 2,000,000g/mol, or from about 300,000g/mol to about 1,800,000g/mol, or from about 500,000g/mol to about 1,600,000g/mol, or from about 700,000g/mol to about 1,400,000g/mol, or from about 900,000g/mol to about 1,200,000 g/mol.

In one embodiment, the cationic copolymer is a trimethylammonium propylmethacrylamide chloride-N-acrylamide copolymer, also known as AM: MAPTAC. MAPTAC can have a charge density of about 1.3meq/g, and an M.Wt. of about 1,100,000 g/mol. In one embodiment, the cationic copolymer is AM: ATPAC. ATPAC may have a charge density of about 1.8meq/g, and an M.Wt. of about 1,100,000 g/mol.

In one embodiment, the cationic guar polymer (a) and the cationic copolymer (b) are used in/added as a blend to the composition. Such blends are disclosed in US2011/0002868a1 (Bierganns et al, filed on 1/7/2010), which is incorporated herein by reference. In particular, see US2011/0002868a1 paragraphs 0042 to 0047 for disclosure of cationic copolymers and paragraphs 0092 to 0095 for specific description of cationic guar polymers. In one embodiment, the blend comprises a cationic guar polymer (a) and a cationic copolymer (b), wherein the cationic copolymer is AM: APTAC. For example, blends of cationic guar and AM APTAC are available from Ashland as falling within the scope of the present invention. For example, blends from Ashland are available which are 95:5 guar hydroxypropyltrimonium chloride (M.Wt.500, 000g/mol; charge density 1.1 meq/g) blended with AM/APTAC (M.Wt.1, 100, 000g/mol; charge density 1.8 meq/g), i.e., the ratio of cationic guar polymer (a) to cationic copolymer (b) is 19: 1.

The blend may comprise a cationic copolymer, wherein the cationic copolymer is formed from a terpolymer of (1) (meth) acrylamide and a cationic (meth) acrylamide-based monomer and/or a hydrolytically stable cationic monomer, (2) (meth) acrylamide, a cationic (meth) acrylate-based monomer, and a (meth) acrylamide-based monomer, and/or a hydrolytically stable cationic monomer. In one embodiment, the blend is a combination of a cationic water-soluble synthetic copolymer and a polygalactomannan or a polyglucomannan, wherein the polygalactomannan and the polyglucomannan are derived from guar gum and comprise quaternary ammonium groups covalently attached to a polysaccharide backbone. In one embodiment, the polygalactomannan or the polyglucomannan has a cationic Degree of Substitution (DS) of from about 0.03 to about 0.70. In one embodiment, the polygalactomannan or the polyglucomannan has a charge density of about 0.1 to about 2.5 meq/g.

(a) The sum of + (b) is in an amount of about 0.0001% to about 0.7% by total weight of the composition. (a) The sum of + (b) represents the total weight percent of the cationic guar polymer defined herein and the cationic copolymer defined herein, based on the total weight of the composition. In one embodiment, the sum of (a) + (b) is about 0.01% to about 0.7%, or about 0.1% to about 0.5%, or about 0.1% to about 0.4%, or about 0.2% to about 0.3%, by total weight of the composition. (a) The sum of + (b) is an amount defined herein, as above this content, the coacervate floc size begins to become too large for good beneficial results to be achieved. Larger floc sizes result in more coacervate particles being trapped between hair fibers and thus not reaching the scalp effectively, i.e., lower deposition on the scalp, and thus not delivering a benefit so effectively. In another embodiment, the sum of (a) + (b) is about 0.0001% to less than about 0.6%, about 0.01% to less than about 0.6%, or about 0.1% to less than about 0.5%, or about 0.1% to less than about 0.4%, or about 0.2% to less than about 0.3%, by total weight of the composition.

(a) The weight ratio of (b) is from about 1000:1 to about 2: 1. In one embodiment, the weight ratio of (a) to (b) is about 1000:1 to about 4: 1. In one embodiment, the weight ratio of (a) to (b) is about 800:1 to about 4:1, or about 500:1 to about 4:1, or about 100:1 to about 5:1, or about 100:1 to about 6:1, or about 50:1 to about 6.5:1, or about 50:1 to about 7:1, or about 50:1 to about 8.3:1, or about 50:1 to about 16.7: 1.

The pH of the composition may be from about pH3 to about pH9, or from about pH4 to about pH 7.

The composition comprises an anti-dandruff active, which may be an anti-dandruff active particulate. In one embodiment, the anti-dandruff active is selected from: a pyrithione salt; 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 anti-dandruff particulate is a pyrithione salt. Such anti-dandruff particulate should be physically and chemically compatible with the composition components and should not unduly impair product stability, aesthetics or performance.

Particles of pyrithione are particulate anti-dandruff actives suitable for use in the compositions of the present invention. In one embodiment, the anti-dandruff active is a 1-hydroxy-2-pyridinethione salt and is in particulate form. In one embodiment, the concentration of pyrithione anti-dandruff particulate ranges from about 0.01% to about 5%, or from about 0.1% to about 3%, or from about 0.1% to about 2%, by weight of the composition. In one embodiment, the pyrithione salts are those formed from heavy metals such as zinc, tin, cadmium, magnesium, aluminum, and zirconium (typically zinc), typically the zinc salt of 1-hydroxy-2-pyrithione (known as "zinc pyrithione" or "ZPT"), typically 1-hydroxy-2-pyrithione salts in the form of platelet particles. In one embodiment, the 1-hydroxy-2-pyrithione salt in platelet particle form has an average particle size of up to about 20 microns, or up to about 5 microns, or up to about 2.5 microns. Salts formed with other cations such as sodium are also suitable. Pyrithione antidandruff actives are described, for example, in us patent 2,809,971; us patent 3,236,733; us patent 3,753,196; us patent 3,761,418; us patent 4,345,080; us patent 4,323,683; us patent 4,379,753; and in us patent 4,470,982.

In one embodiment, the composition comprises one or more antifungal and/or antimicrobial actives in addition to the anti-dandruff active selected from polyvalent metal pyrithione salts. In one embodiment, the antimicrobial active is selected from: coal tar, sulfur, charcoal, compound benzoic acid ointment, Cassai's lacquer, aluminum chloride, gentian violet, octopirox (octopirox ethanolamine), ciclopirox olamine, undecylenic acid and its metal salts, potassium permanganate, selenium sulfide, sodium thiosulfate, propylene glycol, bitter orange oil, urea preparations, griseofulvin, 8-hydroxyquinoline chloroiodoxyquinoline, thiodibazole, thiocarbamate, haloprogin, polyalkene, hydroxypyridinone, morpholine, benzylamine, allylamine (e.g., terbinafine), tea tree oil, clove leaf oil, coriander, rose, berberine, thyme red, cassia oil, cinnamic aldehyde, citronellac acid, hinokitiol, ichthammol, Sensiva SC-50, Elestab HP-100, azelaic acid, lysozyme, iodopropynyl butylcarbamate (IPBC), isothiazolinone (e.g., octyl isothiazolinone), And azoles, and mixtures thereof. In one embodiment, the antimicrobial agent is selected from: itraconazole, ketoconazole, selenium sulfide, coal tar, and mixtures thereof.

In one embodiment, the azole antimicrobial is an imidazole selected from the group consisting of: benzimidazole, benzothiazole, bifonazole, butoconazole nitrate, climbazole, clotrimazole, kruconazole, ebuconazole, econazole, neoconazole, fenticonazole, fluconazole, isoconazole, ketoconazole, lanoconazole, metronidazole, miconazole, naphthoconazole, omoconazole, oxiconazole nitrate, sertaconazole, sulconazole nitrate, tioconazole, thiazole, and mixtures thereof, or the azole antimicrobial agent is a triazole selected from the group consisting of: terconazole, itraconazole, and mixtures thereof. When present in the composition, the azole antimicrobial active is included in an amount of from about 0.01% to about 5%, or from about 0.1% to about 3%, or from about 0.3% to about 2%, by total weight of the composition. In one embodiment, the azole antimicrobial active is ketoconazole. In one embodiment, the only antimicrobial active is ketoconazole.

The present invention also comprises combinations of antimicrobial actives. In one embodiment, the combination of antimicrobial actives is selected from the group consisting of: octopirox and zinc pyrithione, pine tar and sulfur, salicylic acid and zinc pyrithione, salicylic acid and neoconazole, zinc pyrithione and climbazole, octopirox and climbazole, salicylic acid and octopirox, and mixtures thereof.

In one embodiment, the composition comprises an effective amount of a zinc-containing layered material. In one embodiment, the composition comprises from about 0.001% to about 10%, or from about 0.01% to about 7%, or from about 0.1% to about 5%, by total weight of the composition, of a zinc-containing layered material.

The zinc-containing layered material may be one that undergoes crystal growth mainly in a two-dimensional plane. Layer structures are conventionally described as those in which not only all atoms are incorporated into a well-defined layer, but also ions or molecules called tunnel ions (a.f. wells, "Structural Inorganic Chemistry", Clarendon Press, 1975) are present between layers. The zinc-containing layered materials (ZLMs) may have zinc incorporated into the layer and/or may be a tunnel ion component. The following classes of ZLMs represent more common examples in the general class and are not intended to limit the broader scope of materials that fall within this definition.

Many ZLMs occur in nature in the form of minerals. In one embodiment, the ZLM is selected from: hydrozincite (zinc carbonate hydroxide), basic zinc carbonate, aurichalcite (zinc copper carbonate hydroxide), rosasite (copper zinc carbonate hydroxide), and mixtures thereof. Related zinc-containing minerals may also be included in the composition. Natural ZLMs may also exist in which anionic layer species such as clay-type minerals (e.g., phyllosilicates) contain ion-exchanged zinc tunnel ions. All of these natural substances can also be obtained synthetically, or formed in situ in the composition or during the production process.

Another common class of ZLM, which is usually but not always synthetically obtained, is the layered double hydroxides. In one embodiment, the ZLM is of the formula [ M²⁺ _1-xM³⁺ _x(OH)₂]^x+A^m- _x/m·nH₂Layered double hydroxide of O, wherein some or all of the divalent ions (M)²⁺) Is zinc ion (Crepaldi, EL, Pava, PC, Tronto, J, Valim, JB J. colloid Interfac. Sci.2002, 248, 429-42).

Another class of ZLMs, known as hydroxy double salts, can be prepared (Morioka, h., Tagaya, h., Karasu, M, Kadokawa, J, Chiba, K inorg. chem., 1999, 38, 4211-6). In one embodiment, the ZLM is of the formula [ M²⁺ _1-xM²⁺ _1+x(OH)_3(1-y)]⁺A^n- _(1=3y)/n·nH₂Hydroxy double salts of O, in which two metal ions (M)²⁺) May be the same or different. If they are the same and represented by zinc, the formula is simplified to [ Zn ]_1+x(OH)₂]^2x+2x A^-·nH₂And O. This latter formula represents (where x = 0.4) materials such as zinc hydroxychloride and zinc hydroxynitrate. In one embodiment, the ZLM is zinc hydroxychloride and/or zinc hydroxynitrate. These also relate to hydrozincite, in which divalent anions are substituted for monovalent anions. These materials may also be formed in situ in the composition or during the production process.

In one embodiment, the composition comprises basic zinc carbonate. Commercially available sources of Basic Zinc Carbonate include Zinc Carbonate Basic (cam Chemicals: Bensenville, IL, USA), Zinc Carbonate (Shepherd Chemicals: Norwood, OH, USA), Zinc Carbonate (UniCPS on Corp.: New York, NY, USA), Zinc Carbonate (Elementis Pigments: Durham, UK) and Zinc Carbonatec Carbonate AC (Bruggemann chemical: Newtown Square, Pa., USA). Basic zinc carbonate, also commercially known as "zinc carbonate" or "basic zinc carbonate" or "zinc hydroxycarbonate", is of a synthetic type, consisting of materials similar to naturally occurring hydrozincite. The ideal stoichiometry may be formed by Zn₅(OH)₆(CO₃)₂It is shown, however, that the actual stoichiometric ratio may vary slightly and other impurities may be incorporated in the crystal lattice.

In embodiments having a zinc-containing layered material and a pyrithione or a polyvalent metal pyrithione salt, the ratio of the zinc-containing layered material to the pyrithione or polyvalent metal pyrithione salt is from about 5:100 to about 10:1, or from about 2:10 to about 5:1, or from about 1:2 to about 3: 1.

The on-scalp deposition of the anti-dandruff active is at least about 1 μ g/cm². To ensure that the anti-dandruff active reaches the scalp where it can perform its function, deposition of the anti-dandruff active on the scalp is important. In one embodiment, the deposition of the anti-dandruff active on the scalp is at least about 1.5 μ g/cm²Or at least about 2.5. mu.g/cm²Or at least about 3. mu.g/cm²Or at least about 4. mu.g/cm²Or at least about 6. mu.g/cm²Or at least about 7. mu.g/cm²Or at least about 8. mu.g/cm²Or at least about 8. mu.g/cm²Or at least about 10. mu.g/cm². The on-scalp deposition of anti-dandruff actives is determined by washing the hair of an individual with a composition comprising an anti-dandruff active, such as a composition according to the present invention, by a professional cosmetologist according to a conventional washing protocol. The hair on the scalp region is then separated so that an open-ended glass cylinder can remain on the surface while an aliquot of the extraction solution is added and stirred and then recovered and the anti-dandruff active content determined by conventional methods such as HPLC analysis.

In one embodiment, the scalp deposition of basic zinc carbonate is at least about 1 μ g/cm²。

The composition comprises a cosmetically acceptable carrier. In one embodiment, the carrier is an aqueous carrier. The amount and chemistry of the carrier is selected based on compatibility with the other components and other desired characteristics of the product. In one embodiment, the carrier is selected from the group consisting of: water, and an aqueous solution of a lower alkyl alcohol. In one embodiment, the carrier is a lower alkyl alcohol, wherein the monohydric alcohol has from 1 to 6 carbons. In one embodiment, the carrier is ethanol and/or isopropanol. In one embodiment, the cosmetically acceptable carrier is a cosmetically acceptable aqueous carrier and is present at a level of from about 20% to about 95%, or from about 60% to about 85%.

The composition comprises a surfactant. Surfactants are included to provide cleaning performance to the composition. In one embodiment, the surfactant is selected from: anionic surfactants, amphoteric surfactants, zwitterionic surfactants, cationic surfactants, nonionic surfactants, and mixtures thereof. In one embodiment, the surfactant is an anionic surfactant. In one embodiment, the composition comprises from about 5% to about 50%, or from about 8% to about 30%, or from about 10% to about 25%, by total weight of the composition, of surfactant.

The composition may comprise a detersive surfactant system. The detersive surfactant system may comprise at least one anionic surfactant, and optionally a co-surfactant selected from: an amphoteric surfactant, a zwitterionic surfactant, a cationic surfactant, a nonionic surfactant, or a mixture thereof. The concentration of the detersive surfactant system in the composition should be sufficient to provide the desired cleaning and foaming properties. In one embodiment, the composition comprises from about 5% to about 50%, or from about 8% to about 30%, or from about 10% to about 25%, by total weight of the composition, of a detersive surfactant system.

In considering performance characteristics such as coacervate formation, wet conditioning performance, dry conditioning performance, and deposition of conditioning agents onto hair, it is desirable to optimize the level and type of surfactant to maximize the potential for polymer system performance. In one embodiment, the detersive surfactant system used in the composition comprises an anionic surfactant having an ethoxylate level and an anion level, wherein the ethoxylate level is from about 1 to about 10, and wherein the anion level is from about 1 to about 10. The combination of such anionic surfactants with cationic copolymers and cationic guar polymers provides enhanced deposition of conditioning agents to hair and/or skin without reducing cleansing or lathering performance. The optimum ethoxylate level is calculated based on the stoichiometry of the surfactant structure, and then on the specific m.wt. of the surfactant given the moles of ethoxylate. Likewise, given a particular surfactant m.wt. and a measure of completion of the anionization reaction, the anion content can be calculated.

In one embodiment, the detersive surfactant system comprises at least one anionic surfactant comprising an anion selected from the group consisting of: sulfate, sulfonate, sulfosuccinate, isethionate, carboxylate, phosphate, and phosphonate. In one embodiment, the anion is sulfate.

In one embodiment, the anionic surfactant is an alkyl sulfate or an alkyl ether sulfate. These materials have the corresponding formula R⁹OSO₃M and R⁹O(C₂H₄O)_xSO₃M, wherein R⁹Is an alkyl or alkenyl group of from about 8 to about 18 carbon atoms, x is an integer having a value of from about 1 to about 10, and M is a cation such as ammonium, an alkanolamine such as triethanolamine, a monovalent metal cation such as sodium and potassium, or a polyvalent metal cation such as magnesium and calcium. The solubility of the surfactant will depend on the particular anionic surfactant and cation selected. In one embodiment, in both the alkyl sulfate and the alkyl ether sulfate, R⁹Having from about 8 to about 18 carbon atoms, or from about 10 to about 16 carbon atoms, or from about 12 to about 14 carbon atoms. Alkyl ether sulfuric acidThe salts are typically prepared as condensation products of ethylene oxide with monohydric alcohols having from about 8 to about 24 carbon atoms. The alcohol may be synthetic or may be derived from fats, such as coconut oil, palm kernel oil, tallow. In one embodiment, the alcohols are lauryl alcohol and straight chain alcohols derived from coconut oil or palm kernel oil. Such alcohols may be reacted with from about 0 to about 10, or from about 2 to about 5, or about 3 mole fractions of ethylene oxide, and the resulting mixture of molecular species having, for example, an average of 3 moles of ethylene oxide per mole of alcohol is sulfated and neutralized. In one embodiment, the alkyl ether sulfate is selected from: sodium and ammonium salts of cocoalkyltriglycol ether sulfate, sodium and ammonium salts of tallow alkyltriglycol ether sulfate, sodium and ammonium salts of tallow alkyl hexaoxyethylene sulfate, and mixtures thereof. In one embodiment, the alkyl ether sulfate comprises a mixture of individual compounds, wherein the compounds in the mixture have an average alkyl chain length of from about 10 to about 16 carbon atoms, and an average degree of ethoxylation of from about 1 to about 4 moles of ethylene oxide. Such mixtures also comprise from about 0% to about 20% of C_12-13A compound; about 60% to about 100% C_14-15-16A compound; about 0 wt% to about 20 wt% C_17-18-19A compound; from about 3% to about 30% by weight of a compound having a degree of ethoxylation of 0; from about 45% to about 90% by weight of a compound having a degree of ethoxylation of from about 1 to about 4; from about 10% to about 25% by weight of a compound having a degree of ethoxylation of from about 4 to about 8; and from about 0.1% to about 15% by weight of a compound having a degree of ethoxylation greater than about 8.

In one embodiment, the anionic surfactant is selected from: ammonium lauryl sulfate, ammonium laureth sulfate, triethylamine lauryl sulfate, triethylamine laureth sulfate, triethanolamine lauryl sulfate, triethanolamine laureth sulfate, monoethanolamine lauryl sulfate, monoethanolamine laureth sulfate, diethanolamine lauryl sulfate, diethanolamine laureth sulfate, lauric monoglyceride sodium sulfate, sodium lauryl sulfate, sodium laureth sulfate, potassium lauryl sulfate, potassium laureth sulfate, sodium lauryl sarcosinate, sodium lauroyl sarcosinate, lauryl sarcosine, cocoyl sarcosine, ammonium cocoyl sulfate, ammonium lauroyl sulfate, sodium cocoyl sulfate, sodium lauroyl sulfate, potassium cocoyl sulfate, potassium lauryl sulfate, triethanolamine lauryl sulfate, sodium lauryl sulfate, monoethanolamine cocosulfate, monoethanolamine lauryl sulfate, and mixtures thereof. In addition to the sulfate, isethionate, sulfonate, sulfosuccinate described above, other possible anions for anionic surfactants include phosphonate, phosphate, and carboxylate.

The composition and/or detersive surfactant system may comprise a co-surfactant selected from: amphoteric surfactants, zwitterionic surfactants, cationic surfactants, nonionic surfactants, and mixtures thereof. The concentration of such co-surfactants may be from about 0.5% to about 20%, or from about 1% to about 10%, by total weight of the composition. In one embodiment, the composition comprises a co-surfactant selected from the group consisting of: amphoteric surfactants, zwitterionic surfactants, and mixtures thereof. Non-limiting examples of suitable zwitterionic or amphoteric surfactants are described in U.S. Pat. No. 5,104,646 (Bolich Jr. et al), 5,106,609 (Bolich Jr. et al).

Amphoteric surfactants suitable for use in the compositions are well known in the art and include those surfactants broadly described as derivatives of aliphatic secondary and tertiary amines in which the aliphatic radical can be straight or branched chain and wherein one of the aliphatic substituents contains from about 8 to about 18 carbon atoms and one contains an anionic group, e.g., carboxy, sulfonate, sulfate, phosphate, or phosphonate. In one embodiment, the amphoteric surfactant is selected from: sodium cocoylaminopropionate, sodium cocoamphoacetate, sodium cocoamphohydroxypropylsulfonate, sodium cocoamphopropionate, sodium corn oleoamphopropionate, sodium lauraminopropionate, sodium lauroamphoacetate, sodium lauroamphohydroxypropylsulfonate, sodium lauroamphopropionate, sodium corn oleoamphopropionate, sodium lauriminodipropionate, ammonium cocoaminopropionate, ammonium cocoaminodipropionate, ammonium cocoamphoacetate, ammonium cocoamphohydroxypropylsulfonate, ammonium cocoamphopropionate, ammonium corn oleoamphopropionate, ammonium laurylaminopropionate, ammonium lauroamphoacetate, ammonium lauroamphohydroxypropylsulfonate, ammonium cocoamphopropionate, ammonium lauroamphopropionate, ammonium lauroamphohydroxypropylsulfonate, ammonium lauroamphopropionate, ammonium lauroamphoacetate, ammonium lauriminodipropionate, triethanolamine cocoaminopropionate, triethanolamine cocoamphopropionate, sodium coco, Triethanolamine cocoyl aminodipropionate, triethanolamine cocoyl amphoacetate, triethanolamine cocoyl amphohydroxypropyl sulfonate, triethanolamine cocoyl amphopropionate, triethanolamine corn oleoyl amphopropionate, triethanolamine lauryl aminopropionate, triethanolamine lauroyl amphoacetate, triethanolamine lauroyl amphohydroxypropyl sulfonate, triethanolamine lauroyl amphopropionate, triethanolamine corn oleoyl amphopropionate, triethanolamine lauriminodipropionate, cocoyl amphodipropionate, disodium decanoyl amphodiacetate, disodium decanoyl amphodipropionate, disodium octanoyl amphodiacetate, disodium octanoyl amphodipropionate, disodium cocoyl amphocarboxyethyl hydroxypropyl sulfonate, disodium cocoyl amphodiacetate, disodium cocoyl amphodipropionate, disodium dicarboxyethyl cocoyl amphopropionate, disodium decanoyl amphopropionate, disodium octanoyl amphopropionate, disodium cocoyl amphoacetate, disodium dicarboxyethyl cocoyl amphopropionate, disodium decanoyl amphopropionate, disodium octanoyl amphopropionate, disodium cocoyl amphoacetate, disodium decanoyl amphopropionate, disodium decanoyl, Disodium laureth-5 carboxy amphodiacetic acid, disodium lauriminodipropionate, disodium lauroamphodiacetic acid, disodium lauroamphodipropionate, disodium oleyl amphodipropionate, disodium PPG-2-isodecylether-7 carboxy amphodiacetic acid, lauryl aminopropionic acid, lauroamphodipropionic acid, lauryl aminopropylglycine, lauryl diglycolaminoglycine, and mixtures thereof.

In one embodiment, the amphoteric surfactant is a surfactant according to the following structure:

wherein R is¹⁰Is a C-linked monovalent substituent selected from the group consisting of: a substituted alkyl system comprising 9 to 15 carbon atoms, an unsubstituted alkyl system comprising 9 to 15 carbon atoms, a straight chain alkyl system comprising 9 to 15 carbon atoms, a branched chain alkyl system comprising 9 to 15 carbon atoms, and an unsaturated alkyl system comprising 9 to 15 carbon atoms; and wherein R¹¹、R¹²And R¹³Each independently selected from: a C-linked divalent straight chain alkyl system comprising 1 to 3 carbon atoms and a C-linked divalent branched chain alkyl system comprising 1 to 3 carbon atoms; and wherein M⁺Is a monovalent counterion selected from sodium, ammonium and protonated triethanolamine. In one embodiment, the amphoteric surfactant is selected from: sodium cocoamphoacetate, sodium cocoamphodiacetate, sodium lauroamphoacetate, sodium lauroamphodiacetate, ammonium lauroamphoacetate, ammonium cocoamphoacetate, triethanolamine lauroamphoacetate, triethanolamine cocoamphoacetate, and mixtures thereof.

In one embodiment, the composition comprises a zwitterionic surfactant, wherein the zwitterionic surfactant is an aliphatic quaternary ammonium,And derivatives of sulfonium compounds, in which the aliphatic radicals are straight or branched chain, and wherein one of the aliphatic substituents contains from about 8 to about 18 carbon atoms and one contains an anionic group, such as carboxy, sulfonate, sulfate, phosphate, or phosphonate. In one embodiment, the zwitterionic surfactant is selected from: cocamidoethyl betaine, cocamidopropyl amine oxide, cocamidopropyl betaine, cocamidopropyl dimethyl amidohydroxypropyl hydrolyzed collagen, cocamidopropyl dimethyl ammonium hydroxypropyl hydrolyzed collagen, cocamidopropyl hydroxy sulfobetaine, cocamidoamphopropionate, and coco sweetBetaine, cocohydroxy sulfobetaine, coco/oleyl amidopropyl betaine, coco sulfobetaine, lauramidopropyl betaine, lauryl hydroxy sulfobetaine, lauryl sulfobetaine, and mixtures thereof. In one embodiment, the zwitterionic surfactant is selected from: lauryl hydroxysultaine, cocoamidopropyl hydroxysultaine, cocobetaine, cocohydroxysultaine, cocosultaine, lauryl betaine, lauryl sultaine, and mixtures thereof.

In one embodiment, the co-surfactant is selected from: zwitterionic surfactants, amphoteric surfactants, nonionic surfactants, and mixtures thereof. In one embodiment, the surfactant is an anionic surfactant and the composition further comprises a co-surfactant, wherein the co-surfactant is selected from the group consisting of: zwitterionic surfactants, amphoteric surfactants, nonionic surfactants, and mixtures thereof. In one embodiment, the co-surfactant is a nonionic surfactant selected from the group consisting of: cocamide, Cocamide methyl MEA, Cocamide DEA, Cocamide MEA, Cocamide MIPA, lauramide DEA, lauramide MEA, lauramide MIPA, myristamide DEA, myristamide MEA, PEG-20 Cocamide MEA, PEG-2 Cocamide, PEG-3 Cocamide, PEG-4 Cocamide, PEG-5 Cocamide, PEG-6 Cocamide, PEG-7 Cocamide, PEG-3 lauramide, PEG-5 lauramide, PEG-3 oleamide, PPG-2 Cocamide, PPG-2 hydroxyethyl Cocamide, and mixtures thereof. In one embodiment, the co-surfactant is a zwitterionic surfactant, wherein the zwitterionic surfactant is selected from the group consisting of: lauryl hydroxysultaine, cocoamidopropyl hydroxysultaine, cocobetaine, cocohydroxysultaine, cocosultaine, lauryl betaine, lauryl sultaine, and mixtures thereof.

According to an embodiment of the invention, the composition further comprises an insoluble silicone. It has been surprisingly found that by formulating personal care compositions with silicone emulsions containing insoluble silicones (such as polydimethylsiloxanes having a total cyclic silicone content of less than 2.5% by weight based on the total weight of all silicones) in combination with cationic guar polymers and/or cationic copolymers of acrylamide monomers and cationic monomers, the deposition of conditioning polymers and insoluble silicones on skin and hair is improved with minimal or no consumer unacceptable hair conditioning and hair feel.

Without being bound by any particular theory, it is believed that insoluble polyorganosiloxane emulsions having a cyclic polysiloxane content below the above threshold provide improved hair conditioning and hair feel consumer acceptance, as well as excellent deposition on the scalp. It is believed that the cyclic polysiloxane disrupts the formation of higher surfactant micelles, which in turn requires an increase in the amount of salt added to the composition to achieve acceptable rheological parameters of the composition. However, the observed viscosity increase caused by increased salt content may also be accompanied by an increase in the size of the coacervate flocs. Floc size increases, which can adversely affect deposition on the scalp due to, for example, larger flocs being trapped in the hair. By blending the anionic surfactant, cationic conditioning polymer, and silicone emulsion as defined herein, it has been surprisingly found that the consumer-desired benefits of lower cationic guar molecular weight and enhanced cationic copolymer and silicone deposition can be achieved in a single composition, while still retaining consumer desirability. Advantageously, this combination of surfactant, polymer and silicone is used to deposit actives such as anti-dandruff actives.

More specifically, it is believed that insoluble silicones with the desired particle size (< 10 microns) in embodiments of the invention can be delivered to the hair and scalp via entrapment in the coacervate microstructure. The insoluble polysiloxane species trapped in the coacervate microstructure form a less tightly bound structure that can be characteristic of high deposition systems such as cationic guar/synthetic copolymer systems. The less tightly bound coacervate microstructure can be characterized by a decrease in Complex Coacervate Rheology (CCR).

The role of the silicone emulsion also dictates achieving the desired coacervate floc size and rheology reduction. Generally, silicone microemulsions and nanoemulsions contain varying amounts of residual cyclic polysiloxanes. For example, the dimethiconol may comprise a significant amount of cyclic polysiloxanes such as octamethylcyclotetrasiloxane and decamethylcyclotetrasiloxane. Cyclic polysiloxanes can significantly affect the formation of anionic surfactant based compositions such as shampoos by disrupting the formation of higher surfactant micelles, which are critical to achieving a consumer acceptable viscosity target for the composition. As higher micelle formation is disrupted, higher levels of NaCl are added to the personal care composition to compensate for the reduction in viscosity. However, increasing the salt content results in a larger coacervate particle size, which has been shown to cause a negative consumer experience. Thus, silicone emulsions of polysiloxanes having less than the specified levels of cyclic polysiloxanes unexpectedly achieve excellent deposition and quality while providing improved hair feel.

The features of the composition according to the first aspect as well as other aspects and other related components are described in detail below. All components of the compositions described herein should be physically and chemically compatible with the essential components described herein, and should not unduly impair product stability, aesthetics or performance.

According to one embodiment of the present invention, there is provided a personal care composition comprising: a) an anionic surfactant; b) a cationic conditioning polymer; and c) a silicone emulsion comprising an insoluble silicone.

A. Silicone emulsions

Silicone emulsions suitable for use in embodiments of the invention include insoluble polyorganosiloxane emulsions made according to the description provided in U.S. patent 4,476,282 and U.S. patent application publication 2007/0276087. Thus, insoluble polysiloxanes contemplated herein for the purposes of the present invention include polysiloxanes having a molecular weight in the range of from about 50,000 to about 500,000g/mol, such as alpha, omega-hydroxy terminated polysiloxanes, or alpha, omega-alkoxy terminated polysiloxanes. As used herein, "insoluble silicone" means that the silicone has a water solubility of less than 0.05 weight percent. In another embodiment, the water solubility of the polysiloxane is less than 0.02 wt%, or less than 0.01 wt%, or less than 0.001 wt%. According to an embodiment, the insoluble silicone is present in the personal care composition in an amount ranging from about 0.1 wt% to about 3 wt%, based on the total weight of the composition. For example, the insoluble polysiloxane may be present in an amount ranging from about 0.2 wt% to about 2.5 wt%, or from about 0.4 wt% to about 2.0 wt%, or from about 0.5 wt% to about 1.5 wt%, based on the total weight of the composition.

According to one aspect of the silicone emulsion, the insoluble silicone used herein includes an alpha, omega-hydroxy or alkoxy terminated silicone having the general formula I:

R¹⁵-[O-Si(R¹⁴)₂]_n-OR¹⁵，

wherein "n" is an integer, R¹⁴Is substituted or unsubstituted C₁-C₁₀Alkyl or aryl, and R¹⁵Is hydrogen or substituted or unsubstituted C₁-C₁₀Alkyl or aryl. R¹⁴And R¹⁵Non-limiting examples of (a) may be independently selected from alkyl groups such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, neopentyl, tert-pentyl, hexyl groups such as n-hexyl, heptyl groups such as n-heptyl, octyl groups such as n-octyl and isooctyl groups such as 2,2, 4-trimethylpentyl, nonyl groups such as n-nonyl, decyl groups such as n-decyl, dodecyl groups such as n-dodecyl, octadecyl groups such as n-octadecyl; or aryl groups such as phenyl, naphthyl, anthryl and phenanthryl. In one embodiment, the insoluble polysiloxane has the general formula H- [ O-Si (R)¹⁴)₂]_n-OH。

According to another aspect of the silicone emulsion, the insoluble silicone has an average molecular weight in the range of from about 50,000 to about 500,000 g/mol. For example, the insoluble polysiloxane may have a molecular weight of about 60,000 to about 400,000; about 75,000 to about 300,000; an average molecular weight in the range of about 100,000 to about 200,000; or the average molecular weight may be about 150,000 g/mol.

According to another aspect of the silicone emulsion, has the general formula:

wherein R is¹⁴As defined above, and wherein the total content of cyclic polysiloxanes having an m of 4 or 5 in the silicone emulsion is less than about 2.5 weight percent, based on the total weight of all polysiloxanes. For example, dimethiconol may comprise significant amounts of cyclic polysiloxanes such as octamethylcyclotetrasiloxane (D4) and decamethylcyclotetrasiloxane (D5). In one embodiment, the amount of D4 is less than about 2.0%, or less than about 1.5%, or less than about 1.0%, or less than about 0.5%, by total weight of all polysiloxanes. In one embodiment, the amount of D5 is less than about 0.5%, or less than about 0.4%, or less than about 0.3%, or less than about 0.2%, by total weight of all polysiloxanes.

According to yet another aspect of the silicone emulsion, the emulsion has a viscosity of up to about 500,000 cPs. For example, the viscosity may range from about 75,000 to about 300,000, from about 100,000 to about 200,000, or about 150,000 cPs.

According to yet another aspect of the silicone emulsion, the insoluble silicone has an average particle size in the range of from about 30nm to about 10 microns. The average particle size can be, for example, in the range of about 40nm to about 5 microns, about 50nm to about 1 micron, about 75nm to about 500nm, or about 100 nm.

The average molecular weight of The insoluble silicone, The viscosity of The silicone emulsion, and The size of The particles containing The insoluble silicone are determined by methods commonly used by those skilled in The art, such as The method disclosed in The Analytical Chemistry of Silicones, Smith, a.l. (John Wiley & Sons, inc.: new york, 1991).

According to another aspect of the silicone emulsion, the emulsion further comprises an anionic surfactant that participates in providing a high internal phase viscosity emulsion having a particle size in a range of from about 30nm to about 10 microns. The anionic surfactant is selected from organic sulfonic acids. The most common sulfonic acids used in the process of the present invention are alkylaryl sulfonic acids; alkylaryl polyoxyethylene sulfonic acid; an alkyl sulfonic acid; and alkyl polyoxyethylene sulfonic acids. The sulfonic acid has the general formula:

R¹⁶C₆H₄SO₃H （II）

R¹⁶C₆H₄O(C₂H₄O)_mSO₃H （III）

R¹⁶SO₃H （IV）

R¹⁶O(C₂H₄O)_mSO₃H （IV）

in which R may be different¹⁶Is a monovalent hydrocarbon radical having at least 6 carbon atoms. R¹⁶Non-limiting examples of (a) include hexyl, octyl, decyl, dodecyl, hexadecyl, stearyl, tetradecyl, and oleyl. "m" is an integer of 1 to 25. Exemplary anionic surfactants include, but are not limited to, octylbenzenesulfonic acid; dodecyl benzene sulfonic acid; hexadecyl benzene sulfonic acid; α -octyl sulfonic acid; alpha-dodecyl sulfonic acid; alpha-hexadecylsulfonic acid; polyoxyethylene octyl benzene sulfonic acid; polyoxyethylene dodecylbenzene sulfonic acid; polyoxyethylene hexadecyl benzene sulfonic acid; polyoxyethylene octyl sulfonic acid; polyoxyethylene dodecylsulfonic acid; and polyoxyethylene hexadecyl sulfonic acid. Generally, 1 to 15% of the anion is used in the emulsion processA surfactant. For example, 3-10% anionic surfactant may be used to obtain the best results.

The silicone emulsion may also contain additional emulsifiers as well as anionic surfactants, which, together with the controlled emulsification and polymerization reaction temperatures, facilitate the emulsion to be made in a simple and faster manner. Nonionic emulsifiers having a hydrophilic-lipophilic balance (HLB) value of from 10 to 19 are suitable and include polyoxyalkylene alkyl ethers, polyoxyalkylene alkylphenyl ethers, and polyoxyalkylene sorbitan esters. Some useful emulsifiers having HLB values of 10 to 19 include, but are not limited to, octyl ethers of polyethylene glycol; polyethylene glycol lauryl ether; polyethylene glycol tridecyl ether; polyethylene glycol cetyl ether; polyethylene glycol stearyl ether; polyethylene glycol nonylphenyl ether; polyethylene glycol dodecyl phenyl ether; polyethylene glycol hexadecyl phenyl ether; polyethylene glycol stearyl phenyl ether; polyethylene glycol sorbitan monostearate; and polyethylene glycol sorbitan monooleate.

According to embodiments of the present invention, the personal care composition may further comprise one or more benefit agents. Exemplary benefit agents include, but are not limited to, particles, colorants, perfume microcapsules, gel networks, and other insoluble skin or hair conditioning agents such as skin silicones, natural oils such as sunflower oil or castor oil. In one embodiment, the benefit agent is selected from: particles; coloring agent, perfume microcapsules; a gel network; other insoluble skin or hair conditioners such as skin silicones, natural oils such as sunflower oil or castor oil; and mixtures thereof.

Upon dilution of the composition with water, the composition forms coacervate particles. The percentage of coacervate particles with a floc size greater than about 20 microns is about 1% to about 60%. In one embodiment, the percentage of coacervate particles with a floe size of greater than about 20 microns is about 1% to about 50%, or about 1% to about 40%, or about 1% to about 30%, or about 5% to about 20%, about 5% to about 15%. The floc size was measured after the composition was diluted 1:50 with water.

Floc size can be measured using the Lasentec FBRM method: in a suitable mixing vessel, a 1:9 dilution of the composition in distilled water was formed at ambient temperature and mixed for 5 minutes at 250 rpm. Ambient temperature distilled water was transferred to the mixing vessel using a peristaltic pump at a rate of 100g/min to obtain a final dilution of the composition with 1:50 parts distilled water. After 10 minutes equilibration time, the size and amount of flocs as measured by chord length and number of particles per second (number per second) can be determined using the Lasentec Focused Beam Reflectance Method (FBRM) [ model S400A, available from MettlerToledo Corp ].

The viscosity of the coacervate particles can be measured via squeeze flow, obtaining squeeze flow viscosity. The coacervates used for the rheology test can be prepared and isolated as follows: a quantity of a 1:50 dilution of the homogeneously mixed composition in distilled water was prepared at ambient temperature and after centrifugation at 4500rpm for 30 minutes, at least 3 grams of coacervate pellet was obtained. The supernatant was decanted and discarded, and the coacervate pellet was collected. A second centrifugation step of 15 minutes at 9100rpm was required to ensure that the sample was intact prior to measurement. Any residual supernatant was removed without destroying the coacervate pellets collected at the bottom of the vessel.

In the squeeze flow experiment, the coacervates to be tested were loaded between two parallel plates with radius R on a conventional rheometer equilibrated at 25 ℃ (e.g., 25mm parallel plates on TA AR 2000). Sufficient coacervate was added to completely fill the 1000 micron gap and any excess material was removed before testing commenced. The sample was stress relaxed for 1 minute without load. The top plate descends at a constant linear speed due to the decrease in the gap. During this process, the normal force exerted by the sample on the bottom plate is measured by the rheometer. Typical line speeds for the extrusion experiments were 10 or 100 microns/sec. The gap is reduced from 1000 microns until a final gap of 100 microns is reached, or until the normal force reaches the maximum instrument tolerance.

The measured force F and gap h were further analyzed to obtain a more traditional viscosity versus shear rate profile. Analysis of squeeze flow between parallel plates of newtonian and various non-newtonian materials has been published in the literature (jNon-Newtonian Fluid Mechanics, 132 (2005) 1-27). The power law model was chosen to describe the coacervate as it is best suited to describe the viscosity behavior in the non-linear region. The power law parameter K, power law consistency and power law index n (j.of Non-new tonian fluidimed mechanisms, 132 (2005) 1-27) are determined from the corresponding expressions of force as a function of clearance at constant area, constant linear velocity, no slip squeeze flow. The expression of nonlinear force versus gap is first linearized by taking the natural logarithm of both sides of the expression. The power law parameters K and n are then obtained from the slope and intercept of an ln (force) to ln (gap) linear region fit, and using known constants derived from experimental conditions. Using these K and n values, a particular shear rate can be calculated via a power law modelExtrusion flow viscosity η of:

determining 100s using the relationship^-1Extrusion flow viscosity at shear rate.

Upon dilution of the composition with water, the composition forms coacervate particles. At 25 ℃ for 100s^-1The coacervate particles have a squeeze flow viscosity of from about 1 Pa-s to about 100 Pa-s, or from about 1 Pa-s to about 80 Pa-s, or from about 2 Pa-s to about 60 Pa-s, or from about 3 Pa-s to about 50 Pa-s, or from about 4 Pa-s to about 40 Pa-s, or from about 5 Pa-s to about 30 Pa-s, or from about 10 Pa-s to about 20 Pa-s, as measured using a TA AR2000 rheometer. Pa · s means pascal seconds. These values relate to the composition when diluted 1:50 with water (composition: water).

In one embodiment of the method, an average consumer acceptance score on a scale of 1 to 100 of 60 or more, or 65 or more, or 70 or more, or 75 or more, or 80 or more, or 85 or more is obtained. To obtain an average consumer acceptance rating, the compositions are evaluated by a consumer panel ranging in size from 10 to 400 people, for example, from 16 to 310 people. Panelists were asked to use the composition alone as their shampoo over a range of 3 days to 4 cycles. After use, panelists were asked to assess the different attributes of the composition, and its experience of use on a 5-point scale. For numerical analysis purposes, the responses were converted to a 100 point scale and an average consumer acceptance score was calculated.

An alternative embodiment of the first aspect relates to a method of treating hair comprising applying to the hair a composition comprising:

(a) a cationic guar polymer, wherein the cationic guar polymer has a weight average M.Wt. of less than about 1,000,000g/mol, and wherein the cationic guar polymer has a charge density of about 0.1meq/g to about 2.5 meq/g;

(c) an anti-dandruff active;

(d) a cosmetically acceptable carrier;

(e) a surfactant;

wherein the weight ratio of (a) to (b) is from about 1000:1 to about 3.5: 1;

In one of this alternative embodiment, the method further comprises diluting the composition with water, or the composition is diluted 1:50 with water (group)The compound is water). In one embodiment, coacervate particles are formed after the composition is diluted 1:50 with water, wherein the coacervate particles are formed at 25 ℃ and 100s^-1The coacervate particles have a squeeze flow viscosity of from about 1cP to about 100cP, measured using a TA AR2000 rheometer; and wherein the percentage of coacervate particles with a floc size of greater than about 20 microns is from about 1% to about 60%; and wherein the on-scalp deposition of the anti-dandruff active is at least about 1 μ g/cm². In one embodiment of this alternative embodiment, the method further comprises rinsing the hair.

(c) an anti-dandruff active;

(d) a cosmetically acceptable carrier;

(e) a surfactant;

wherein the weight ratio of (a) to (b) is from about 1000:1 to about 3.5: 1;

The details of the composition described with respect to the first aspect apply mutatis mutandis equally to the composition of the second aspect.

In one embodiment, at 26.6 ℃ and 2s^-1The composition has 4,000cP to 20,000cP, or about 6,000cP to about 12,000cP, or about 8,00 cP measured using a Brookfield R/S Plus rheometerA viscosity of 0cP to about 11,000 cP. cP refers to centipoise.

In one embodiment, the composition is capable of forming coacervate particles upon dilution of the composition with water at 1: 50; and wherein at 25 ℃ and 100s^-1The coacervate particles have a squeeze flow viscosity of from about 1cP to about 100cP, measured using a TA AR2000 rheometer; and wherein the percentage of coacervate particles with a floc size of greater than about 20 microns is from about 1% to about 60%; and wherein the on-scalp deposition of the anti-dandruff active is at least about 1 μ g/cm². The coacervates and consumer acceptance details described with respect to the first aspect apply equally, mutatis mutandis, to the composition of the second aspect.

A third aspect relates to the use of a composition according to the second aspect for treating hair. In one embodiment, the use is for achieving improved hair feel and/or for reducing dandruff. The details of the composition described with respect to the first aspect apply mutatis mutandis equally to the composition of the third aspect.

A fourth aspect relates to a kit comprising:

(b) a composition is provided.

In one embodiment, the composition of the kit is a composition according to the second aspect.

The details of the composition described with respect to the first aspect apply mutatis mutandis equally to the composition of the fourth aspect. The method details described with respect to the first aspect are equally applicable, mutatis mutandis, to the method of the fourth aspect.

Examples of the invention

The following examples illustrate the invention. The exemplary compositions can be prepared by conventional formulation and mixing techniques. It is to be understood that other modifications may be made by those skilled in the art of hair care formulations without departing from the spirit and scope of the invention. All parts, percentages and ratios herein are by weight unless otherwise indicated. Certain components may come from suppliers as dilute solutions. The amounts given reflect the weight percentage of active substance, unless otherwise indicated.

Examples 1 to 4, 8 and 9 are in accordance with the invention, whereas examples 5, 6,7 and 10 to 11 are not.

All examples：

Comparison of data

Experiment I：

In experiment I, the compositions in the table below were compared against their coacervate particle squeeze flow viscosity, the floc size of the coacervate particles, the on-scalp deposition of the anti-dandruff active, and the consumer acceptance score. Compositions 1,3 to 8 and 10 are obtained from the table in the examples section above. The results are shown in the following table:

in all cases:¹= guar hydroxypropyltrimethylammonium chloride (charge density 0.8meq/g, and m.wt.500,000 g/mol);²= PQ-76 from Rhodia (charge density 1.6meq/g, and m.wt.1,000,000 g/mol).

In all cases:^#= from examples section above;¹= guar hydroxypropyltrimethylammonium chloride (charge density 0.7meq/g, and m.wt. 425,000 g/mol);²= PQ-76 from Rhodia (charge density 1.6meq/g, and m.wt.1,000,000 g/mol);³= blend from Ashland, 95:5 guar hydroxypropyltrimonium chloride (m.wt.500, 000g/mol; charge density 1.1 meq/g) and AM/APTAC (m.wt.1, 100, 000g/mol; charge density 1.8 meq/g).

The compositions detailed in the examples section above comprise guar hydroxypropyltrimonium chloride and PQ-76 in various ratios. Experiment I shows that there is a balance between a better consumer sensory score and increased deposition of the anti-dandruff agent on the scalp. Composition X is a guar only control.

The values of (a) + (b) according to the present invention correlate with consumer acceptance. This can be seen when comparing compositions 8 and 10. Composition 10 was high deposition, resulting in an unacceptable average consumer acceptance score. On the other hand, composition 8 was a high deposit with a good consumer acceptance score. Compositions 8 and 10 differ only in the total amount of cationic guar polymer and cationic copolymer, i.e. (a) + (b). The anti-dandruff agent deposition was similar for compositions 8 and 10. The floc size of compositions 8 and 10 is smaller than the coacervate particle ratio for floc sizes greater than 20 microns due to the floc size results in compositions 8 with good consumer acceptance scores and compositions 10 with poor consumer acceptance scores.

Experiment II：

Compositions a to H below were prepared. Compositions a to H are based on a binder comprising: 12.5% (SLE 1S); 1.5% Sodium Lauryl Sulfate (SLS); 1.5% cocamidopropyl betaine (CAPB); 1% dimethiconol emulsion (from Wacker). Compositions B and C are in accordance with the present invention. Compositions A, D, E, F, G and H are not in accordance with the present invention. Composition a is representative of example 1 of EP1080714a2, especially in terms of cationic guar polymers and cationic copolymers. The base is similar to the other components of example 1 of EP1080714a 2. The U.S. counterpart of EP1080714A2 is US 2003/0176303. The compositions in the table below are compared against squeeze flow viscosity of the coacervate particles, floc size of the coacervate particles, on-scalp deposition of the anti-dandruff active. The results are shown in the table.

In all cases: = acrylamidopropyltrimethylammonium chloride/acrylamide copolymer having a m.wt. of 4,000,000g/mol, and a charge density of 4.2meq/g, and obtained from Ciba;c-17 corresponds to formula G above and has a density of about 0.6meq/GA cationic charge density, and an m.wt. of about 2,200,000g/mol, and is available from rhodia company;¹= guar hydroxypropyltrimethylammonium chloride (charge density 0.7meq/g, and m.wt. 425,000 g/mol);²= PQ-76 from Rhodia (charge density 1.6meq/g, and m.wt.1,000,000 g/mol);³= blend from Ashland, 95:5 guar hydroxypropyltrimonium chloride (m.wt.500, 000g/mol; charge density 1.1 meq/g) and AM/APTAC (m.wt.1, 100, 000g/mol; charge density 1.8 meq/g).

As shown in experiment II, compositions B and C according to the present invention show excellent coacervate floc size and squeeze flow viscosity and will result in excellent consumer acceptance scores. The coacervate floc size and squeeze flow viscosity of the composition A, D, E, F, G and H are outside the scope of the present invention and will not be well accepted by consumers. Composition a shows a composition wherein the molecular weight and charge density of the cationic guar polymer and cationic copolymer and the ratio of (a) to (b) are not in accordance with the present invention, such that the coacervate floc size and squeeze flow viscosity properties are not within the scope of the present invention. In composition D, the cationic copolymer of composition A is replaced by a cationic copolymer falling within the limits of the cationic copolymer (b) according to the invention. In composition E, the cationic guar of composition a is replaced by cationic guar belonging to the range defined by cationic guar (a) according to the invention. However, compositions D and E still achieved coacervate performance in terms of squeeze flow viscosity and floc size that was outside the scope of the invention. Compositions F, G and H show ratios of (a) to (b) within the scope of the present invention, but do not include cationic guar polymers or cationic copolymers having molecular weight and/or charge density values within the scope of the present invention. This results in a coacervate property where floc size and squeeze flow viscosity are outside the scope of the invention. The relationship between floc size and the squeeze flow viscosity of the coacervate and consumer acceptance with respect to coacervate performance is illustrated in part in fig. 1.

FIG. 1 shows a schematic view of a

FIG. 1 is a graphical representation of floc size, squeeze flow viscosity, and consumer acceptance as related to coacervate performance. Axis X: 100s^-1Lower coacervate squeeze flow viscosity in centipoise. Axis Y: a percentage of coacervate particles having a floc size greater than about 20 microns. Bubble size relates to consumer acceptance scores (larger bubbles equate to greater consumer acceptance). The gas bubble size decreased with increasing floc size or squeeze flow viscosity of the coacervate particles, indicating a relationship between consumer acceptance score and coacervate performance. When the cationic polymer properties are varied, specifically their ratio and content are varied so as to be outside the scope of the present invention, the floc size or squeeze flow viscosity of the coacervate particles becomes less acceptable to the consumer. For example, a dark gray filled circle is not within the desired consumer acceptance due to having a cationic guar polymer to cationic copolymer ratio (i.e., (a): b) that is not within the "range where the weight ratio of (a): b) is from about 1000:1 to about 3.5: 1". Since the ratio of (a) to (b) is lower than the "where the weight ratio of (a) to (b) is about 1000:1 to about 3.5: 1", a black filled circle is not within the scope of the present invention. Beyond "amounts where the sum of (a) + (b) is from about 0.0001% to about 0.7%", the filled-in light gray circles are not within the expected consumer acceptance.

Clause and subclause

The following clauses are part of the detailed description.

1. A hair conditioning composition comprising:

(c) an anti-dandruff active;

(d) a cosmetically acceptable carrier;

(e) a surfactant;

wherein the weight ratio of (a) to (b) is from about 1000:1 to about 3.5: 1;

and wherein the sum of (a) + (b) is about 0.0001% by total weight of the composition

To an amount of about 0.7%.

2. The composition of clause 1, wherein the cationic guar polymer has a weight average molecular weight of from about 150,000 to about 800,000g/mol, or from about 200,000 to about 700,000g/mol, or from about 300,000 to about 700,000g/mol, or from about 400,000 to about 600,000 g/mol.

3. The composition of any of the preceding clauses wherein the weight ratio of (a) to (b) is from about 800:1 to about 4:1, or from about 500:1 to about 4:1, or from about 100:1 to about 5:1, or from about 100:1 to about 6:1, or from about 50:1 to about 6.5:1, or from about 50:1 to about 7:1, or from about 50:1 to about 8.3:1, or from about 50:1 to about 16.7: 1.

4. The composition of any of the preceding clauses wherein the cationic copolymer has a charge density of from about 1.1meq/g to about 2.5meq/g, or from about 1.1meq/g to about 2.3meq/g, or from about 1.2meq/g to about 2.2meq/g, or from about 1.2meq/g to about 2.1meq/g, or from about 1.3meq/g to about 2.0meq/g, or from about 1.3meq/g to about 1.9 meq/g.

5. The composition of any of the preceding clauses wherein the composition comprises a zinc-containing layered material, wherein the zinc-containing layered material is selected from the group consisting of basic zinc carbonate, zinc carbonate hydroxide, hydrozincite, zinc copper carbonate hydroxide, aurichalcite, copper zinc carbonate hydroxide, rosasite, phyllosilicate containing zinc ions, layered double hydroxide, hydroxyl double salt, and mixtures thereof.

6. The composition of any of the preceding clauses wherein the on-scalp deposition of basic zinc carbonate is at least about 1 μ g/cm²。

7. The composition of any of the preceding clauses wherein the cosmetically acceptable carrier is a cosmetically acceptable aqueous carrier and is present at a level of from about 20% to about 95%, or from about 60% to about 85%.

8. The composition of any one of the preceding clauses wherein the sum of (a) + (b) is about 0.01% to about 0.7%, or about 0.1% to about 0.5%, or about 0.1% to about 0.4%, or about 0.2% to about 0.3%, by total weight of the composition.

9. The composition of any of the preceding clauses wherein the composition comprises from about 0.01% to about 0.7%, or from about 0.04% to about 0.55%, or from about 0.08% to about 0.5%, or from about 0.16% to about 0.5%, or from about 0.2% to about 0.5%, or from about 0.3% to about 0.5%, or from about 0.4% to about 0.5%, by total weight of the composition, of the cationic guar polymer (a).

10. The composition of any of the preceding clauses wherein the composition comprises from about 0.001% to about 0.1%, or from about 0.01% to about 0.1%, from about 0.02% to about 0.1%, by total weight of the composition, of the cationic copolymer (b).

11. The composition of any one of the preceding clauses wherein the composition is at 26.6 ℃ and 2s^-1The composition has a viscosity of 4,000cP to 20,000cP as measured using a Brookfield R/S Plus rheometer.

12. The composition of any of the preceding clauses wherein the surfactant is an anionic surfactant.

13. The composition of any of the preceding clauses wherein the cationic monomer is selected from dimethylaminoethyl (meth) acrylate, dimethylaminopropyl (meth) acrylate, di-tert-butylaminoethyl (meth) acrylate, dimethylaminomethyl (meth) acrylamide, dimethylaminopropyl (meth) acrylamide; ethyleneimine, vinylamine, 2-vinylpyridine, 4-vinylpyridine; trimethyl (meth) acryloyloxyethylammonium chloride, trimethyl (meth) acryloyloxyethylammonium methyl sulfate, dimethyl ammonium (meth) acryloyloxyethylbenzylammonium chloride, 4-benzoylbenzyl dimethylacryloxyethyl ammonium chloride, trimethyl (meth) acrylamidoethylammonium chloride, trimethyl (meth) acrylamidopropylammonium chloride, vinylbenzyltrimethylammonium chloride, diallyldimethylammonium chloride, and mixtures thereof.

14. Use of a composition according to any of clauses 1 to 11 for treating hair.

15. Use according to clause 12 for obtaining improved hair feel.

16. A method of treating hair comprising applying to hair a composition according to any of clauses 1 to 12.

The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numerical values recited. Rather, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as "40 mm" is intended to mean "about 40 mm".

Each document cited herein, including any cross-referenced or related patent or patent application, is hereby incorporated by reference in its entirety unless expressly excluded or otherwise limited. The citation of any document is not an admission that it is prior art with respect to any invention disclosed or claimed herein or that it teaches, suggests or discloses any such invention either alone or in any combination with any other reference or references. In addition, to the extent that any meaning or definition of a term in this document conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this document shall govern.

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.

Claims

1. A method of obtaining improved hair feel comprising applying to hair a composition comprising:

(a) a cationic guar polymer, wherein the cationic guar polymer has a weight average molecular weight of less than 1,000,000g/mol, and wherein the cationic guar polymer has a charge density of 0.1meq/g to 2.5 meq/g;

(b) a cationic copolymer of an acrylamide monomer and a cationic monomer, wherein the copolymer has a charge density of 1.0meq/g to 3.0 meq/g;

(c) an anti-dandruff active;

(d) a cosmetically acceptable carrier;

(e) a surfactant;

wherein the weight ratio of (a) to (b) is 1000:1 to 3.5: 1;

and wherein the sum of (a) + (b) is in an amount of 0.0001% to 0.7% by total weight of the composition;

and wherein the coacervate particles have a squeeze flow viscosity of from 1cP to 100 cP;

and wherein the percentage of coacervate particles with a floc size of greater than 20 microns is from 1% to 60%; preferably from 1% to 40%,

and wherein the on-scalp deposition of the anti-dandruff active is at least 1 μ g/cm²。

2. The method of any one of the preceding claims, wherein an average consumer acceptance score of 60 or higher on a scale of 1 to 100 is obtained.

3. The method of any preceding claim wherein the cationic guar polymer has a weight average molecular weight of from 150,000 to 800,000g/mol, preferably wherein the cationic guar polymer has a weight average molecular weight of from 200,000 to 700,000 g/mol.

4. The method according to any one of the preceding claims, wherein the weight ratio of (a) to (b) is from 800:1 to 4:1, preferably the weight ratio of (a) to (b) is from 100:1 to 6:1, and more preferably the weight ratio of (a) to (b) is from 50:1 to 8.3: 1.

5. The method of any preceding claim, wherein the cationic copolymer has a charge density of from 1.1 to 2.5meq/g, preferably from 1.2 to 2.2 meq/g.

6. The method of any preceding claim, wherein the sum of (a) + (b) is in an amount of 0.0001% to less than 0.6%.

7. The method according to any preceding claims, wherein the anti-dandruff active is selected from the group consisting of antimicrobial actives, pyrithione salts, azoles, selenium sulfide, particulate sulfur, keratolytic acid, salicylic acid, octopirox (octopirox ethanolamine), coal tar, and mixtures thereof.

8. The method of any preceding claim, wherein the composition comprises a zinc-containing layered material, wherein the zinc-containing layered material is selected from the group consisting of basic zinc carbonate, zinc carbonate hydroxide, hydrozincite, zinc copper carbonate hydroxide, aurichalcite, copper zinc carbonate hydroxide, rosasite, phyllosilicate containing zinc ions, layered double hydroxide, hydroxy double salt, and mixtures thereof.

9. The method according to any preceding claims, wherein the on-scalp deposition of basic zinc carbonate is at least 1 μ g/cm²。

10. The method according to any preceding claim, wherein the sum of (a) + (b) is in an amount of from 0.01% to 0.7% by total weight of the composition, preferably in an amount of from 0.1% to 0.5% by total weight of the composition.

11. The method of any preceding claim, wherein the composition comprises from 0.01% to 0.7% cationic guar polymer (a), by total weight of the composition.

12. The method of any preceding claim, wherein the composition comprises from 0.001% to 0.1% of the cationic copolymer (b), by total weight of the composition.

13. The method of any preceding claim, wherein the coacervate particles have an extrusion flow viscosity of from 2 to 60 Pa-s.

14. The method of any preceding claim, wherein the surfactant is an anionic surfactant.

15. The method of any preceding claim, wherein the composition further comprises a co-surfactant, wherein the co-surfactant is selected from the group consisting of zwitterionic surfactants, amphoteric surfactants, nonionic surfactants, and mixtures thereof.