Hair care composition

Abstract

A hair care composition comprising: a) a piroctone compound; and b) a cationic homopolymer and / or copolymer comprising acrylamidopropyltrimethylammonium moieties, wherein the homopolymer and / or copolymer has a charge density of at least 3.5 meq / g.

Description

TECHNICAL FIELD

[0001] The present invention relates to a hair care composition, particularly an anti-dandruff shampoo composition. BACKGROUND OF THE INVENTION

[0002] Hair care compositions generally provide the benefits of cleansing or conditioning or a combination of both. Such compositions typically contain one or more cleansing surfactants which generally assist in cleaning the hair and scalp, removing unwanted dirt, particles and fatty substances.

[0003] Dandruff is a problem that affects many people worldwide. The condition is characterized by the shedding of clumps of dead skin cells from the scalp. It is white in color and results in an aesthetically unpleasant appearance. The factors that cause dandruff are certain members of the Malassezia yeast genus. To address these problems, hair treatment compositions have been developed to contain various active substances for anti-dandruff efficacy. Pyrithione compounds such as zinc pyrithione are one such active substance.

[0004] A common problem with pyrithione compounds is their poor deposition onto the hair or scalp during the washing process. This is especially the case when effective anionic cleansing surfactants such as sodium laureth sulfate are present in the composition. During excessive rinsing, most of the pyrithione is likely to be washed away together with the surfactant. Poor deposition is associated with low anti-dandruff activity, and thus the adverse effects of dandruff are hardly alleviated. To date, attempts have been made to compensate for this deficiency by increasing the level of zinc pyrithione in the hair treatment composition. This approach causes various problems such as increased cost, potential instability of the formulation and potential adverse effects on the feel of the hair. Therefore, it is not an industrially preferred approach.

[0005] Cationic polymers are used to enhance the deposition of conditioners and / or anti-dandruff agents on the hair and / or scalp. These polymers can be synthetic or natural polymers modified with cationic substituents.

[0006] The present invention relates to enhancing the deposition of a pyrithione compound (octopirox) using a cationic polymer having a defined charge density. Summary of the Invention

[0008] In a first aspect, the present invention relates to a hair care composition comprising:

[0009] a) a pyrithione compound; and

[0010] b) a homopolymer and / or copolymer comprising acrylamidopropyltrimethylammonium moieties, wherein the homopolymer and / or copolymer has a charge density of at least 3.5 meq / g at pH 7 and a weight average molecular weight of 100,000 to 500,000 (g / mol).

[0011] In a second aspect, the present invention relates to a cosmetic method of depositing an anti-dandruff agent onto the scalp, which comprises the step of applying a hair care composition of any embodiment of the first aspect onto the surface of the scalp of an individual. The method is for non-therapeutic benefits. Detailed Description of the Invention

[0013] The term hair care composition refers to a composition for topical application to the hair and / or scalp of mammals, especially humans. Such compositions are generally classifiable as leave-on or rinse-off. The compositions of the present invention may be in the form of a liquid, lotion, cream, foam, scrub, gel or bar soap. Non-limiting examples of such compositions include leave-on hair lotions, creams, and rinse-off shampoos, conditioners, body gels or cleansing bar soaps. The compositions of the present invention are preferably rinse-off compositions, more preferably shampoos or conditioners, and most preferably shampoos.

[0014] Cationic charge density refers to the number of cationic charges per unit weight of a given polymer. As used herein, the term "charge density" refers to the ratio of the positive charges on the monomer units constituting the polymer to the molecular weight of said monomer units. The charge density multiplied by the polymer molecular weight determines the number of positively charged sites on a given polymer chain. The cationic charge density can be calculated from the degree of substitution as described in WO2013 / 011122, the disclosure of which is incorporated herein by reference in its entirety, especially on page 8, lines 8-17.

[0015] The cationic charge density of a polymer is also suitably determined by the Kjeldahl method described in the chemical test for nitrogen determination in the United States Pharmacopeia and is expressed in milliequivalents per gram (meq).

[0016] The cationic charge density is determined at pH 7.

[0017] Water-insolubility means that the solubility of a substance in water is 0.1% by weight or less at 25 °C and atmospheric pressure.

[0018] Molecular weight refers to the weight-average molecular weight of a given polymer. The weight-average molecular weight (WAVG MW) of a given polymer is determined by SEC (size exclusion chromatography) analysis using absolute calibration (universal calibration). The polysaccharide standards amylopectin and dextran are used for calibration.

[0019] Except where otherwise indicated in the examples or elsewhere, all numbers indicating amounts of materials or reaction conditions, physical properties of materials, and / or uses in this specification may optionally be understood to be modified by the word "about".

[0020] Unless otherwise specified, all amounts are based on the weight of the final hair care composition. It should be noted that when specifying a range of any value, any specific lower value can be associated with any specific higher value.

[0021] When a feature is disclosed for a specific aspect of the present invention (such as a composition of the present invention), such disclosure should also be considered as being adapted, with the necessary modifications, to any other aspect of the present invention (such as a method of the present invention).

[0022] Polymers suitable for use in the compositions of the present invention include acrylamidopropyltrimethylammonium chloride. Preferably, in addition to acrylamidopropyltrimethylammonium chloride, the copolymer further comprises acrylamide. A particularly preferred copolymer is a copolymer of acrylamidopropyltrimethylammonium chloride and acrylamide.

[0023] The polymers and / or copolymers according to the present invention have a charge density of at least 3.5 meq / g at pH 7, more preferably 4 meq / g or greater, and most preferably from 4.3 to 5.3 meq / g.

[0024] The weight-average molecular weight of the homopolymer and / or copolymer is preferably from 100,000 to 500,000, more preferably from 150,000 to 400,000.

[0025] Examples of suitable homopolymers are commercially available from Ashland under the trade name N-DurHance (cationic homopolymer of acrylamidopropyltrimethylammonium chloride). Examples of suitable copolymers are commercially available from Ashland under the trade name N-DurHance (cationic copolymer of acrylamidopropyltrimethylammonium chloride / acrylamide copolymer).

[0026] Typically, the cationic polymer is present at a level of from 0.01 to 5% by weight of the total composition, preferably from 0.05 to 2% by weight, more preferably from 0.1 to 1% by weight.

[0027] In addition to the homopolymer / copolymer, additional cationic deposition polymers may be included, but they are not preferred.

[0028] A preferred form of the composition is an anti-dandruff shampoo. The anti-dandruff shampoo may suitably comprise from 50 to 90%, preferably from 60 to 80% of water by weight of the total shampoo.

[0029] Cleaning Phase

[0030] The cleansing phase comprises one or more cleansing surfactants. The cleansing surfactants are those which serve to clean the hair and / or the scalp. The total level of cleansing surfactants, based on the weight of the total composition, is preferably from 3 to 45%, more preferably from 5 to 25%, and most preferably from 7 to 20%.

[0031] Preferably, the cleansing surfactants include anionic surfactants. The anionic surfactants include ethoxylated alkyl sulfate anionic surfactants. Preferred alkyl ether sulfates are those of formula (I):

[0032] R-O-(CH2CH2-O) n -SO3 - M + (I)

[0033] wherein R is a straight or branched alkyl chain having 8 to 18 (preferably 12 to 18) carbon atoms; n is the average degree of ethoxylation and ranges from 0.5 to 3 (preferably 1 to 3); M is a solubilizing cation such as sodium, potassium, ammonium or substituted ammonium. An example is sodium lauryl ether sulfate (SLES). The most preferred example is SLES having an average degree of ethoxylation of from 0.5 to 3, preferably 1 to 3.

[0034] The preferred level of such surfactant is from 2 to 20% by weight of the total composition, more preferably from 7 to 15% by weight.

[0035] Other surfactants may be present in the composition, such as alkyl sulfates. Preferred alkyl sulfates are C 8-18 alkyl sulfates, more preferably C 12-18 alkyl sulfates, preferably in the form of salts having a solubilizing cation such as sodium, potassium, ammonium or substituted ammonium. Examples are sodium lauryl sulfate (SLS) or sodium dodecyl sulfate (SDS).

[0036] The cleansing phase may comprise one or more other anionic surfactants which are cosmetically acceptable and suitable for topical application to the hair and / or the scalp. Examples of other anionic surfactants include alkyl sulfonates, alkyl succinates, alkyl sulfosuccinates, alkyl ether sulfosuccinates, N-alkyl sarcosinates, alkyl phosphates, alkyl ether phosphates and alkyl ether carboxylic acids and their salts, especially their sodium, magnesium, ammonium and monoethanolamine, diethanolamine and triethanolamine salts. The alkyl ether sulfosuccinates, alkyl ether phosphates and alkyl ether carboxylic acids and their salts may contain from 1 to 20 ethylene oxide or propylene oxide units per molecule.

[0037] Typical anionic cleansing surfactants for shampoo compositions as described in the present application include sodium oleyl succinate, ammonium lauryl sulfosuccinate, sodium lauryl ether sulfosuccinate, sodium dodecylbenzenesulfonate, triethanolamine dodecylbenzenesulfonate, lauryl ether carboxylic acid, sodium N-lauroyl sarcosine, sodium lauroyl monoglyceride sulfate, sodium lauryl sulfate, sodium laureth sulfate, sodium coco sulfate, sodium cocoyl isethionate, and mixtures thereof.

[0038] The composition may include co-surfactants to help impart aesthetic, physical, or cleansing properties to the composition. The co-surfactants are preferably included in the cleansing phase of the composition. Examples of co-surfactants are nonionic surfactants, which may be included in an amount of from 0.5 to 10%, preferably from 2 to 8%, more preferably from 1 to 5% by weight of the total composition.

[0039] For example, representative nonionic surfactants that may be included in the treatment composition of the present invention (preferably a shampoo composition) include condensation products of aliphatic (C8-C 18 ) primary or secondary straight-chain or branched-chain alcohols or phenols with an alkylene oxide (usually ethylene oxide), and generally having from 6 to 30 ethylene oxide groups. Other representative nonionic surfactants include mono- or di-alkyl alkanolamides. Examples include coconut mono- or diethanolamide and coconut monoisopropanolamide.

[0040] Further nonionic surfactants that may be included are alkyl polyglycosides (APGs). Generally, an APG is an alkyl polyglycoside comprising an alkyl group linked to one or more blocks of glycosyl groups (optionally via a bridging group). Preferred APGs are defined by the following formula (II):

[0041] R O-(G) k (II)

[0042] wherein R' is a branched or straight-chain alkyl group, which may be saturated or unsaturated, and G is a glycosyl group. R' may represent an average alkyl chain length of from about C5 to about C 20 and preferably R' represents from about C8 to about C 12The average alkyl chain length. Most preferably, the value of R' ranges from about 9.5 to about 10.5. G can be selected from C5 or C6 monosaccharide residues and is preferably a glycoside. G can be selected from glucose, xylose, lactose, fructose, mannose, and their derivatives. Preferably, G is glucose. The degree of polymerization k can have a value of about 1 to about 10 or greater; preferably, the value of k ranges from about 1.1 to about 2; most preferably, the value of k ranges from about 1.3 to about 1.5. Suitable alkyl polyglycosides for use in the present invention are commercially available and include, for example, those materials identified below: Oramix NS10 from Seppic; Plantaren 1200 and Plantaren 2000 from Henkel.

[0043] Other sugar-derived nonionic surfactants that can be included in the compositions (preferably shampoos) of the present invention include C 10 -C 18 N-alkyl (C1-C6) polyhydroxy fatty acid amides, such as C 12 -C 18 N-methylglucamide (as described, for example, in WO92 / 06154 and US 5,194,639), and N-alkoxypolyhydroxy fatty acid amides, such as C 10 -C 18 N-(3-methoxypropyl) glucamide.

[0044] Preferred examples of co-surfactants are amphoteric or zwitterionic surfactants, which can be included in an amount of 0.5 to about 10% by weight, preferably 2 to 8% by weight, more preferably 1 to 5% by weight of the total composition.

[0045] Examples of amphoteric or zwitterionic surfactants include alkylamine oxides, alkyl betaines, alkylamidopropyl betaines, alkylsulfobetaines (sulfobetaines), alkylglycinates, alkylcarboxyglycinates, alkylamphoacetates, alkylamphopropionates, alkylamphoglycinates, alkylaminopropylhydroxysulfobetaines, acyltaurates, and acylglutamates, where the alkyl and acyl groups have 8 to 22 carbon atoms. Typical amphoteric and zwitterionic surfactants for use in the shampoos of the present invention include lauryldimethylamine oxide, coco dimethyl sulfopropyl betaine, lauryl betaine, cocoamidopropyl betaine, and sodium cocoamphoacetate.

[0046] Particularly preferred amphoteric or zwitterionic surfactants are acylamino betaine amphoteric surfactants having the general formula (III):

[0047]

[0048] where m is 2 or 3; R 1C(O) is selected from straight-chain or branched-chain, saturated or unsaturated acyl groups having 8 to 22 carbon atoms and mixtures thereof; and R 2 and R 3 are each independently selected from alkyl, hydroxyalkyl or carboxyalkyl groups having 1 to 6 carbon atoms and mixtures thereof. An example is cocamidopropyl betaine. The preferred level of such surfactant is from 0.5 to 10% by weight, more preferably from 2 to 8% by weight, and most preferably from 1 to 5% by weight of the total composition.

[0049] Other optional but preferred surfactants are alkyl glycinate and / or alkyl carboxyglycinate. If present, they are present in an amount of from 1 to 8% by weight, preferably from 2 to 6% by weight.

[0050] Preferably, the alkyl glycinate and / or alkyl carboxyglycinate have an alkyl group of C 8-22 carbon atoms, which is in the form of a salt with solubilizing cations such as sodium, potassium, ammonium or substituted ammonium. Preferred glycinate salts are sodium cocoyl glycinate and sodium cocoyl glycinate.

[0051] Mixtures of any of the aforementioned amphoteric or zwitterionic surfactants may also be suitable. Preferred mixtures are those of cocamidopropyl betaine with other amphoteric or zwitterionic surfactants as described above. Preferred other amphoteric or zwitterionic surfactants are sodium cocoamphoacetate.

[0052] In a preferred embodiment, the cleansing phase comprises an alkyl sulfate and / or an ethoxylated alkyl sulfate anionic surfactant; and a betaine surfactant, preferably an alkylamidopropyl betaine.

[0053] The total amount of surfactant (including any co-surfactants) in the hair treatment composition is generally from 1 to 50% by weight, preferably from 2 to 40% by weight, more preferably from 10 to 25% by weight of the total composition weight.

[0054] Piroctone Compound

[0055] The piroctone compounds useful in the present invention may include piroctone, primary, secondary and tertiary alkanolamine salts of piroctone (e.g., diethanolamine and triethanolamine salts), and mixtures thereof, preferably piroctone, primary alkanolamine salts of piroctone (i.e., piroctone ethanolamine, also known as ) and mixtures thereof.

[0056] The piroctone compounds useful in the present invention generally comprise a structure defined by formula (IV):

[0057]

[0058] wherein R4 is selected from C1-C 17 hydrocarbyl groups, and R5 is selected from C1-4 alkyl, C 2-4 alkenyl or alkynyl, hydrogen, phenyl or benzyl, and M1 is selected from hydrogen, monoethanolamine (MEA), diethanolamine (DEA) or triethanolamine (TEA). The preferred R4 group is (CH3)3CCH2CH(CH3)CH2-, and the preferred R5 is methyl. More preferably, R4 is (CH3)3CCH2CH(CH3)CH2-, R5 is methyl, and M1 is hydrogen or MEA. Most preferably, R4 is (CH3)3CCH2CH(CH3)CH2-, R5 is methyl, and M1 is hydrogen.

[0059] Piroctone olamine is particularly preferred.

[0060] Typical levels of the piroctone compound are from 0.01 to 0.5% by weight of the total composition, preferably from 0.05 to 0.5% by weight, more preferably from 0.1 to 0.5% by weight.

[0061] Preferably, the weight ratio of the homopolymer / copolymer to the piroctone compound is preferably 2:1 or more preferably 1.5:1 or less, most preferably from 0.3:1 to 1.1:1.

[0062] Preferably, the piroctone compound accounts for at least 50% by weight, more preferably at least 70% by weight, of the total level of anti-dandruff agents in the composition.

[0063] Oil-in-Water Emulsion

[0064] The composition according to the present application may comprise an oil-in-water emulsion.

[0065] The aqueous phase of the emulsion comprises water. Suitably, the emulsion comprises from 25 to 85%, preferably from 40 to 70%, more preferably from 45 to 60% by weight of water based on the total weight of the emulsion.

[0066] Silicone is present in the oil-in-water emulsion. The silicone is a conditioner intended to deposit on the hair and remain after rinsing the hair with water.

[0067] The silicone (D 3,2 ) droplets in the oil-in-water emulsion preferably have a particle size of from 10 nanometers to 10 micrometers, more preferably having a D 3,2 average droplet diameter of from 50 nanometers to 5 micrometers, most preferably from 100 nanometers to 5 micrometers. The D 3,2 average droplet diameter can be measured by laser scattering techniques, for example using a 2600D Particle Sizer from Malvern Instruments.

[0068] Typical levels of the silicone are from 0.1 to 5% by weight of the total composition, preferably from 0.3 to 3% by weight, more preferably from 0.5 to 2.5% by weight.

[0069] Typical polysiloxanes can include polyalkylsiloxanes, polyarylsiloxanes, polyalkylarylsiloxanes, polyethersiloxane copolymers, and mixtures thereof.

[0070] The polysiloxane can include functionalized polysiloxanes. Suitable functionalized polysiloxanes include, for example, hydroxyl-substituted polysiloxanes, amino-substituted polysiloxanes, carboxyl-substituted polysiloxanes, betaine-substituted polysiloxanes, quaternary ammonium-substituted polysiloxanes, carbohydrate-substituted polysiloxanes, hydroxyl-substituted polysiloxanes, and alkoxy-substituted polysiloxanes. The functionalized polysiloxane can also contain multiple substitutions. Preferably, the functionalized polysiloxane is an amino polysiloxane, particularly if the piroctone compound is to be dissolved in the polysiloxane.

[0071] Amino polysiloxanes are described in EP455185 and include trimethylsilylamino dimethyl polysiloxanes as shown below, which have sufficient water insolubility to be useful in emulsions:

[0072] Si(CH3)3-O-[Si(CH3)2-O-]x-[Si(CH3)

[0073] (R6-NH-CH2CH2-NH2)-O-]y-Si(CH3)3

[0074] where the value of x + y is from about 50 to about 500, the weight percentage of the amine functional group is from about 0.03% to about 8%, and where R6 is an alkylene group having 2 to 5 carbon atoms. Preferably, the value of x + y is 100 to 300, and the weight percentage of the amine functionality is about 0.5% to 4%. As represented herein, the weight percentage of the amine functionality is measured by titrating an amino polysiloxane sample with alcoholic hydrochloric acid to a bromocresol green end point. The weight percentage of the amine is calculated using a molecular weight of 45 (corresponding to CH3-CH2-NH2).

[0075] Other cationic polymers include polygalactomannans and polysaccharide polymers such as cationic cellulose derivatives and cationic starch derivatives.

[0076] Suspending Agent

[0077] The suspending agent is a preferred feature of the composition. Suitable suspending agents are selected from polyacrylic acid, crosslinked polymers of acrylic acid, copolymers of acrylic acid and hydrophobic monomers, copolymers of carboxylic acid-containing monomers and acrylates, crosslinked copolymers of acrylic acid and acrylates, heteropolysaccharide gums, and crystalline long-chain acyl derivatives. The long-chain acyl derivatives are preferably selected from ethylene glycol stearate, alkanolamides of fatty acids having 16 to 22 carbon atoms, and mixtures thereof. Ethylene glycol distearate and polyethylene glycol 3 distearate are preferred long-chain acyl derivatives because they impart pearlescence to the composition. Polyacrylic acid is commercially available as Carbopol 420, Carbopol 488, or Carbopol 493. Polymers of acrylic acid crosslinked with polyfunctional agents can also be used; they are commercially available as Carbopol 910, Carbopol 934, Carbopol 941, and Carbopol 980. An example of a suitable copolymer of carboxylic acid-containing monomers and acrylates is Carbopol 1342. All Carbopol (trademark) materials are available from Goodrich. Suitable crosslinked polymers of acrylic acid and acrylates are Pemulen TR1 or Pemulen TR2. A suitable heteropolysaccharide gum is xanthan gum, such as xanthan gum available as Kelzan Mu.

[0078] Mixtures of any of the above suspending agents can be used. Preferred is a mixture of a crosslinked polymer of acrylic acid and a crystalline long-chain acyl derivative.

[0079] The most preferred example is a crosslinked polyacrylate polymer.

[0080] If a suspending agent is included, it is generally present in the shampoo composition of the present invention at a level of 0.01 - 5% by weight, preferably 0.1 - 2.5% by weight, more preferably 0.25 - 1% by weight.

[0081] When measured at 30 °C using a Brookfield V2 viscometer (spindle RTV5, 1 minute, 20 rpm), the viscosity of the composition is suitably in the range of 3,000 to 10,000 MPa·s, preferably in the range of 4,000 to 8,000 MPa·s, more preferably in the range of 5,000 to 7,000 MPa·s.

[0082] The pH range of the composition of the present invention is preferably from 3 to 9, more preferably from 4 to 7, still more preferably from 4.5 to 6.5.

[0083] Other Optional Components

[0084] The composition may optionally contain one or more components for hair treatment products, provided that the optional components are physically and chemically compatible with the essential components described above and do not otherwise unduly impair the sensory, formulation rheology, and conditioning properties. The individual concentration range of such optional components can be from 0.001% to 10% by weight of the total composition, preferably from 0.01% to 5% by weight. Such components can include fragrances, dyes and pigments, pH regulators, pearlescents or opacifiers, viscosity regulators, preservatives, and natural hair nutrients such as plant preparations, fruit extracts, sugar derivatives, and amino acids. The composition may contain additional polysiloxanes that are not in the oil-in-water emulsion phase. The additional polysiloxanes can be the same as or different from the polysiloxanes contained in the emulsion phase. The composition may also contain additional anti-dandruff and / or anti-microbial agents such as pyrithione salts, pine tar, sulfur, salicylic acid, azoles, selenium sulfide, or mixtures thereof.

[0085] Method of Use

[0086] The composition is used in a manner for treating a surface. An effective amount of the composition is applied to the desired surface selected from hair and / or scalp, which is preferably pre-wetted with water. The composition may be allowed to remain on the surface for a predetermined time to take effect, preferably in combination with massage, and then rinsed off with water. The given time is preferably from 20 seconds to 2 minutes, more preferably from 30 seconds to 1 minute. The effective amount is generally in the range of 1 g to 20 g, preferably 2.5 g to 10 g.

[0087] The composition of the present invention is mainly intended for topical application to the scalp and / or at least a portion of the hair of an individual and is a rinse-off or leave-on composition, preferably a rinse-off composition such as a shampoo.

[0088] The following examples are provided to assist in the understanding of the present invention. The provision of the examples is not limited to the scope of the claims. The examples according to the present invention are denoted by numbers, and the comparative examples are denoted by letters. Examples

[0089] Prepare the following examples.

[0090]

[0091] Apply 0.1 g of the composition of the example per g of hair evenly on the hair tress. Wash the hair tress twice. Once washed, place the hair tress in a drying oven (50 °C) until dry. Once dry, transfer the hair tress to a jar containing 10 ml of ethanol. Seal the jar and place it on a bottle roller for a known amount of time. Using a syringe, take an appropriate size of analytical sample from the jar and filter it through a syringe filter into a vial for analysis against a set of standards containing known amounts of octopirox ethanol solution (μg / ml) using the HPLC-UV method.

[0092] Table 2 - Octopirox Deposition

[0093]

[0094] The examples of the present invention deposit octopirox on the hair more effectively compared to the comparative examples.

Claims

1. A hair care composition comprising: a) 0.01 to 0.5% by weight of a piroctone compound selected from compounds comprising the structure defined by formula (IV): wherein R4 is selected from C1-C 17 hydrocarbyl, R5 is selected from C 1-4 alkyl, C 2-4 alkenyl or alkynyl, hydrogen, phenyl or benzyl, and M1 is selected from hydrogen, monoethanolamine (MEA), diethanolamine (DEA) or triethanolamine (TEA); and b) 0.01 to 5% by weight of a cationic homopolymer comprising acrylamidopropyltrimethylammonium moieties and / or an acrylamidopropyltrimethylammonium chloride / acrylamide copolymer, wherein the homopolymer and / or copolymer has a charge density of 4 to 5.3 meq / g at pH 7 and a weight average molecular weight of 150,000 to 400,000 g / mol as determined by size exclusion chromatography using absolute calibration.

2. The hair care composition according to claim 1, wherein the weight ratio of the homopolymer / copolymer to the piroctone compound is 2:1 or less.

3. The hair care composition according to claim 1, wherein the weight ratio of the homopolymer / copolymer to the piroctone compound is 1.5:1 or less.

4. The hair care composition according to claim 1, wherein the weight ratio of the homopolymer / copolymer to the piroctone compound is from 0.3:1 to 1:

1.

5. The hair care composition according to any one of claims 1-4, wherein the piroctone compound is piroctone ethanolamine.

6. The hair care composition according to any one of claims 1-4, wherein the piroctone compound is piroctone.

7. The hair care composition according to any one of claims 1-4, wherein the piroctone compound is selected from primary, secondary, and tertiary alkanolamine salts of piroctone.

8. The hair care composition according to any one of claims 1-4, wherein the weight ratio of acrylamidopropyltrimethylammonium chloride to acrylamide in the copolymer is greater than 2:

1.

9. The hair care composition according to any one of claims 1-4, wherein the level of the cationic polymer is 0.01 to 2% by weight of the total composition.

10. The hair care composition according to any one of claims 1-4, wherein the composition is a shampoo.

11. The hair care composition according to any one of claims 1-4, which comprises an anionic surfactant.

12. The hair care composition according to any one of claims 1-4, which comprises an ethoxylated alkyl sulfate anionic surfactant.

13. The hair care composition according to any one of claims 1-4, which comprises sodium laureth sulfate.

14. The hair care composition according to any one of claims 1-4, wherein the homopolymer and / or copolymer has a charge density of 4.3 to 5.3 meq / g at pH 7.

15. The hair care composition according to any one of claims 1-4, wherein the piroctone compound is present at a level of 0.05 to 0.5% by weight of the total composition.

16. The hair care composition according to any one of claims 1-4, wherein the piroctone compound is present at a level of 0.1 to 0.5% by weight of the total composition.

17. The hair care composition according to any one of claims 1-4, wherein the cationic polymer is present at a level of 0.05 to 2% by weight of the total composition.

18. The hair care composition according to any one of claims 1-4, wherein the cationic polymer is present at a level of 0.1 to 1% by weight of the total composition.

19. The hair care composition according to any one of claims 1-4, further comprising a silicone emulsion.

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