Hair cleaning composition

Abstract

Hair cleansing composition The present invention relates to a hair cleansing composition comprising: a) at least one anionic surfactant; b) at least one alpha-hydroxy acid and at least one beta-hydroxy acid; c) at least one piroctone compound; and d) at least one alpha olefin sulfonate. The present invention also relates to a hair cleansing process comprising applying the composition according to the present invention to the hair and then rinsing the hair with water after an optional exposure period. Figure for abstract: none

Description

Title of the invention: Hair cleaning composition Technical field

[0001] The present invention relates to a hair cleansing composition. The present invention also relates to a hair cleansing process. RELATED ART

[0002] Scalp disorders such as dandruff and seborrheic dermatitis are associated with the presence of a characteristic yeast known as Malassezia ovalis, which was previously known as Pityrosporum (P. ovale and P. orbiculare).

[0003] Furthermore, it is known that this yeast is capable of changing its shape and metabolism. In particular, it can transform into a filamentous form (Malassezia furfur) which is responsible for the inflammatory and pigmentary disease known as Pityriasis versicolor.

[0004] The usual treatment of all these complaints involves the use of antifungal agents in a medium, such as a shampoo, gel or lotion, which is suitable for distributing these agents and depositing them on the integuments.

[0005] The antifungal activity of these agents is limited; furthermore, the persistence of the antifungal activity is low. Thus, treatments using these antifungal agents have very moderate, or even low, efficacy.

[0006] It is known that piroctone olamine is one of the most effective anti-dandruff agents, and that lactic acid and salicylic acid have stronger peeling effectiveness. However, piroctone olamine is very difficult to dissolve in a low pH system.

[0007] As a commercial product, it is desired that the product be stable over time.

[0008] There is therefore a need in the art to develop a product for cleaning the scalp, which is effective in terms of anti-dandruff and stable over time. Summary of the invention

[0009] An object of the present invention is therefore to develop hair cleaning compositions which are effective in terms of anti-dandruff and stable over time.

[0010] Another object of the present invention is to provide a process for cleaning the scalp.

[0011] Thus, according to a first aspect, the present invention provides a hair cleansing composition comprising:

[0012] a) at least one anionic surfactant;

[0013] b) at least one alpha-hydroxy acid and at least one beta-hydroxy acid;

[0014] c) at least one piroctone compound; and

[0015] d) at least one alpha olefin sulfonate.

[0016] Preferably, the composition according to the present invention is free of silicon.

[0017] According to a second aspect, the present invention provides a process for cleansing hair comprising applying the composition as described above to the hair, then rinsing the hair with water after an optional exposure period.

[0018] The inventors have found that the composition according to the present invention is effective in terms of films and stable over time.

[0019] Other objects and characteristics, aspects and advantages of the present invention will appear even more clearly on reading the detailed description and the examples which follow. DETAILED DESCRIPTION OF THE INVENTION

[0020] In this document, unless otherwise indicated, the limits of a range of values ​​are included in this range, in particular in the expressions "between...and..." and "from...to...".

[0021] As used herein, the term "comprising" shall be interpreted to include all specifically mentioned features as well as optional, additional, unspecified features.

[0022] In this document, the use of the term "comprising" also discloses the embodiment in which no features other than the specifically mentioned features are present (i.e. "consisting of").

[0023] Unless otherwise defined, all technical and scientific terms used herein have the meaning commonly understood by those skilled in the art to which the present invention pertains. Where the definition of a term in this specification conflicts with the meaning commonly understood by those skilled in the art to which the present invention pertains, the definition described herein shall apply.

[0024] In this document, the expression "at least one" used in the present description is equivalent to the expression "one or more".

[0025] As used herein, "silicon-free" means that no silicon-containing compound is purposefully added and that the content of the silicon-containing compound in the composition is less than 0.5% by weight, particularly less than 0.1% by weight, based on the total weight of the composition. In particular, there is no silicon in the composition.

[0026] According to the first aspect of the present invention, a hair cleansing composition comprises:

[0027] a) at least one anionic surfactant;

[0028] b) at least one alpha-hydroxy acid and at least one beta-hydroxy acid;

[0029] c) at least one piroctone compound; and

[0030] d) at least one alpha olefin sulfonate. Anionic surfactants

[0031] According to the first aspect of the present invention, the composition comprises at least one anionic surfactant.

[0032] By "anionic surfactant" is meant a surfactant comprising, as ionic or ionizable groups, only anionic groups.

[0033] In the present description, a species is said to be "anionic" when it carries at least one permanent negative charge or when it can be ionized as a negatively charged species, under the conditions of use of the composition of the invention (for example the medium or the pH) and not comprising any cationic charge.

[0034] The anionic surfactants may be sulfate and / or sulfonate surfactants.

[0035] It is understood in this description that:

[0036] - the anionic sulfonate surfactants comprise at least one sulfonate function (-SO3H or -SO3) and may optionally also comprise one or more sulfate functions, but do not comprise carboxylate functions; and

[0037] - the anionic sulfate surfactants comprise at least one sulfate function but do not include carboxylate or sulfonate functions.

[0038] The anionic sulfonate surfactants which can be used comprise at least one sulfonate function (-SO3H or -SO3).

[0039] They can be chosen from the following compounds: alkylsulfonates, alkylamide-sulfonates, alkylarylsulfonates, α-olefinsulfonates, paraffin sulfonates, alkylsulfo-succinates, alkyl ether sulfosuccinates, alkylamidesulfosuccinates, alkylsulfoacetates, N-acyltaurates, acylisethionates; alkylsulfolaurates; as well as the salts of these compounds.

[0040] the alkyl groups of these compounds comprising from 6 to 30 carbon atoms, in particular from 12 to 28, better still from 14 to 24 or even from 16 to 22 carbon atoms; the aryl group preferably designating a phenyl or benzyl group;

[0041] these compounds being optionally polyoxyethylenated, in particular polyoxyethylenated, and then preferably comprising from 1 to 50 ethylene oxide units and better still from 2 to 10 ethylene oxide units.

[0042] Preferably, the anionic sulfonate surfactants are chosen, alone or in combination, from:

[0043] - C6-C24 and in particular C12-C20 alkylsulfosuccinates, laurylsulfo- succinates in particular;

[0044] - C6-C24 and in particular C12-C20 alkyl ether sulfosuccinates;

[0045] - C6-C24 acylisethionates and preferentially C6-C24 acylisethionates C12-C18,

[0046] in particular in the form of alkali metal or alkaline earth metal, ammonium or amino alcohol salts.

[0047] The anionic sulfate surfactants that can be used comprise at least one sulfate function (-OSO3H or -OSO3).

[0048] They can be chosen from the following compounds: alkyl sulfates, alkyl ether sulfates, alkylamido ether sulfates, alkylaryl polyether sulfates, monoglyceride sulfates; as well as the salts of these compounds;

[0049] the alkyl groups of these compounds comprising from 6 to 30 carbon atoms, in particular from 12 to 28, better still from 14 to 24 or even from 16 to 22 carbon atoms; the aryl group preferably designating a phenyl or benzyl group;

[0050] these compounds being optionally polyoxyethylenated, in particular polyoxyethylenated, and then preferably comprising from 1 to 50 ethylene oxide units and better still from 2 to 10 ethylene oxide units.

[0051] Preferably, the anionic sulfate surfactants are chosen, alone or in combination, from:

[0052] - C6-C24 and in particular C12-C20 alkyl sulfates,

[0053] - alkyl ether sulfates, in particular C6-C24, or even C12-C20, comprising pre preferably from 2 to 20 ethylene oxide units;

[0054] in particular in the form of alkali metal or alkaline earth metal, ammonium or amino alcohol salts.

[0055] When the anionic surfactant is in salt form, said salt may be chosen from alkali metal salts, such as the sodium or potassium salt, ammonium salts, amine salts and in particular amino alcohol salts, and alkaline earth metal salts, such as the magnesium salt.

[0056] Among the amino alcohol salts that may be mentioned, there may be included monoethanolamine, diethanolamine and triethanolamine salts, monoisopropanolamine, diisopropanolamine or triisopropanolamine salts, 2-amino-2-methyl-1-propanol salts, 2-amino-2-methyl-1,3-propanediol salts and tris(hydroxymethyl)aminomethane salts.

[0057] Preferably, alkali or alkaline earth metal salts are used, and in particular sodium or magnesium salts.

[0058] Preferably, the anionic surfactants are chosen, alone or in combination, from:

[0059] - C6-C24 and in particular C12-C20 alkyl sulfates;

[0060] - C6-C24 and in particular C12-C20 alkyl ether sulfates; preferably comprising potentially from 2 to 20 ethylene oxide units;

[0061] -C6-C24 and in particular C12-C20 alkylsulfosuccinates, in particular laurylsulfosuccinates;

[0062] - C6-C24 and in particular C12-C20 alkyl ether sulfosuccinates;

[0063] -C6-C24 acylisethionates and preferentially C6-C24 acylisethionates C12-C18;

[0064] in particular in the form of salts of alkali metal such as sodium or of alkaline earth metal, ammonium or amino alcohol.

[0065] Preferably, the anionic surfactant is chosen from sodium laureth sulfate, sodium lauryl sulfate, and a combination thereof.

[0066] Advantageously, the anionic surfactant is present in an amount ranging from 5% by weight to 50% by weight, preferably from 8% by weight to 30% by weight, more preferably from 10% by weight to 20% by weight, relative to the total weight of the composition. Hydroxyacids

[0067] According to the first aspect of the present invention, the composition comprises at least one alpha-hydroxy acid and at least one beta-hydroxy acid. Alpha-hydroxy acids

[0068] By "alpha-hydroxy acid" is meant, according to the present invention, a carboxylic acid having at least one hydroxyl functional group occupying an alpha position on said acid (carbon adjacent to a carboxylic acid functional group).

[0069] Suitable alpha hydroxy acids include glycolic acid, citric acid, lactic acid, methyllactic acid, glucuronic acid, pyruvic acid, 2-hydroxybutanoic acid, 2-hydroxypentanoic acid, 2-hydroxyhexanoic acid, 2-hydroxyheptanoic acid, 2-hydroxyoctanoic acid, 2-hydroxynonanoic acid, 2-hydroxydecanoic acid, 2-hydroxyundecanoic acid, 2-hydroxydodecanoic acid, 2-hydroxytetradecanoic acid, 2-hydroxyhexadecanoic acid, 2-hydroxyoctadecanoic acid, 2-hydroxytetracosanoic acid, 2-hydroxyeicosanoic acid, mandelic acid, phenyllactic acid, gluconic acid, galacturonic acid, aleuritic acid, ribonic acid, tartronic acid, tartaric acid, malic acid, fumaric acid.

[0070] Preferably, the alpha-hydroxy acid is selected from lactic acid, glycolic acid, tartaric acid, mandelic acid, citric acid, and combinations thereof.

[0071] More preferably, the alpha-hydroxy acid in the composition consists of lactic acid.

[0072] Lactic acid, or 2-hydroxypropanoic acid, gently exfoliates excess sebum, residue and dead cells around the follicles and gives energy and bounce to the hair roots. In addition, lactic acid also stimulates the production of glycosaminoglycans (GAGs) in the skin, thus improving the barrier function and hydration of the skin.

[0073] Advantageously, the alpha-hydroxy acid is present in an amount ranging from 0.5% by weight to 20% by weight, preferably from 1% by weight to 15% by weight, and more preferably from 2% by weight to 10% by weight, relative to the total weight of the composition. Beta-hydroxy acids

[0074] By "beta-hydroxy acid" is meant, according to the present invention, a carboxylic acid having a hydroxyl functional group and a carboxylic functional group separated by two carbon atoms.

[0075] Suitable beta-hydroxy acids include salicylic acid, propionic acid, beta-hydroxybutyric acid, beta-hydroxy-beta-methylbutyric acid, carnitine, their derivatives and combinations thereof.

[0076] Preferably, the beta-hydroxy acid is chosen from salicylic acid and its derivative

[0077] in which R is a linear, branched or cyclic saturated aliphatic group or an unsaturated aliphatic group containing one or more double bonds, conjugated or not, these groups containing from 2 to 22, preferably from 3 to 11 carbon atoms and being able to be substituted for example by at least one substituent chosen from (a) halogen atoms, (b) the trifluoromethyl group, (c) hydroxyl groups in free form or esterified by an acid containing from 1 to 6 carbon atoms or (d) a carboxyl function free or esterified by a lower alcohol containing from 1 to 6 carbon atoms;

[0078] R' is a hydroxyl group or an ester functional group of the following formula: ---O--C — Ri (II)

[0079] in which Ri is a linear or branched, saturated or unsaturated aliphatic group containing from 1 to 18 carbon atoms.

[0080] Preferred salicylic acid derivatives include 5-n-octanoyl salicylic acid (capryloyl salicylic acid), 5-n-decanoyl salicylic acid, 5-n-dodecanoyl salicylic acid, 5-n-heptyloxy salicylic acid and 4-n-heptyloxy salicylic acid.

[0081] More preferably, the beta-hydroxy acid is chosen from salicylic acid, 5-n-octanoyl salicylic acid, 5-n-decanoyl salicylic acid, 5-n-dodecanoyl salicylic acid, 5-n-heptyloxy salicylic acid, 4-n-heptyloxy salicylic acid, and their combination.

[0082] Most preferably, the beta-hydroxy acid is salicylic acid.

[0083] Salicylic acid, or 2-hydroxybenzoic acid, is provided to the chemical peel composition to allow enhanced penetration of the composition into the skin. Salicylic acid penetrates deeper into the skin than alpha-hydroxy acids, such as lactic acid.

[0084] Advantageously, the beta-hydroxy acid is present in an amount ranging from 0.3% by weight to 20% by weight, preferably from 0.5% by weight to 10% by weight, and more preferably from 1% by weight to 5% by weight, relative to the total weight of the composition.

[0085] Advantageously, the alpha-hydroxy acid to beta-hydroxy acid ratio is from 0.5 to 30, preferably from 1 to 15, and more preferably from 2 to 10. Preferably, the alpha-hydroxy acid is lactic acid and the beta-hydroxy acid is salicylic acid.

[0086] The inventors have found that the composition according to the present invention can effectively remove stubborn sebum, in particular, when the composition contains lactic acid and salicylic acid or its derivative. Thus, the combination of surfactant and hydroxy acids provides an even better long-lasting cleaning effect. Piroctone compounds

[0087] The composition according to the present invention comprises at least one piroctone compound.

[0088] The piroctone compound for use in the present invention may include piroctone acid, primary, secondary and tertiary olamine salts of piroctone acid (such as diethanolamine and triethanolamine salts), and mixtures thereof, preferably piroctone acid, primary olamine salt of piroctone acid (i.e. piroctone olamine, also known as Octopirox®) and mixtures thereof.

[0089] The piroctone compound useful in the present invention typically contains the structure defined by formula (III):

[0090] wherein R2 is selected from C1-C17 alkyl and C2-C17 alkenyl groups, R3 is selected from C1-C4 alkyl, C2-C4 alkenyl or alkynyl groups, hydrogen, phenyl or benzyl, and M i is selected from hydrogen, monoethanolamine (MEA), diethanolamine (DEA), or triethanolamine (TEA).

[0091] A preferred R2 is (CH3)3CCH2CH(CH3)CH2- and a preferred R3 is methyl.

[0092] More preferably, R2 is (CH3)3CCH2CH(CH3)CH2-, R3 is methyl and Mi is hydrogen or MEA. Most preferably, R2 is (CH3)3CCH2CH(CH3)CH 2-, R3 is methyl and Mi is hydrogen.

[0093] Particularly preferably, the composition according to the present invention comprises piroctone olamine.

[0094] Advantageously, the piroctone compound is present in an amount ranging from 0.1% by weight to 10% by weight, preferably from 0.3% by weight to 5% by weight, more preferably from 0.5% by weight to 2% by weight, relative to the total weight of the composition. Alpha-olefin sulfonates

[0095] The composition according to the present invention comprises at least one alpha olefin sulfonate.

[0096] Alpha olefin sulfonate (also called hereinafter a-olefin sulfonate) preferably comprises from 8 to 28 carbon atoms, in particular from 10 to 24 carbon atoms, better still from 12 to 20 carbon atoms and in particular from 14 to 18 carbon atoms.

[0097] Said α-olefin sulfonates are known compounds and are described in particular in Ullmann's encyclopedia of industrial chemistry or in US patent 8211850. These compounds are generally obtained by sulfonation of α-olefins.

[0098] Preferably, the alpha olefin sulfonate is a linear alpha olefin sulfonate (also called linear α-olefin sulfonate hereinafter).

[0099] The linear alpha olefin sulfonates according to the invention may be of formula (A):

[0100] R-CH2-CH=CH-(CH2)n-SO3M (A)

[0101] in which:

[0102] - R is a saturated linear alkyl radical comprising from 4 to 30 carbon atoms, in particular from 6 to 20 carbon atoms, or even from 8 to 18 carbon atoms and even better from 10 to 14 carbon atoms;

[0103] - n is an integer between 0 and 10, preferably between 1 and 4 and better still n = 1;

[0104] - M is a cosmetically acceptable cation, chosen in particular from the cation ammonium, cations derived from alkali or alkaline earth metals, cations derived from organic amines such as alkanolamines; preferably those derived from alkali metals; and in particular Na+ or K+.

[0105] Preferably, R represents a linear alkyl radical comprising from 8 to 14 carbon atoms, in particular from 10 to 12 carbon atoms.

[0106] Preferably, M is derived from an alkali metal, in particular Na+ or K+.

[0107] Preferably, the linear olefin sulfonates according to the invention correspond to the following formula: Q R-GH—CH=GH—CH—S“OW G

[0108] in which:

[0109] - R is a saturated linear alkyl radical comprising from 4 to 20 carbon atoms, in particular from 6 to 18 carbon atoms, or even from 8 to 14 carbon atoms and better still from 10 to 12 carbon atoms;

[0110] - M is a cosmetically acceptable cation, chosen in particular from the cation ammonium, cations derived from alkali or alkaline earth metals, cations derived from organic amines such as alkanolamines; preferably those derived from alkali metals or alkali metals; and in particular Na+ or K+.

[0111] Preferably, the alpha olefin sulfonates according to the invention are chosen from alpha olefin sulfonates comprising from 8 to 28 carbon atoms, in particular from 10 to 24 carbon atoms, better still from 12 to 20 carbon atoms and in particular from 14 to 18 carbon atoms; in particular of alkali metals, in particular of sodium.

[0112] Commercial products which may be cited in particular include those sold under the name Bio-Terge AS-40A or Bio-Terge AS-40HA by the company Stepan, or Calsoft AOS-40 by the company Pilot Chemical, or as a variant NANSA LSS 38 / FL by the company INNOSPEC ACTIVE CHEMICALS.

[0113] Advantageously, the linear alpha-olefin sulfonate is present in an amount ranging from 0.1% by weight to 20% by weight, preferably from 0.3% by weight to 15% by weight, more preferably from 0.5% by weight to 10% by weight, most preferably from 0.5% by weight to 3% by weight, relative to the total weight of the composition. Aqueous phase

[0114] The composition according to the present invention comprises an aqueous phase.

[0115] Preferably, the aqueous phase is a continuous phase.

[0116] The aqueous phase of the present invention comprises water.

[0117] The aqueous phase may also comprise water-miscible organic solvents (at room temperature of 20-25°C), for example polyols such as C2-C6 polyols, more particularly glycerin, hexylene glycol; glycol ethers (containing in particular from 3 to 16 carbon atoms) such as mono-, di- or tripropylene glycol (C1-C4) alkyl ethers, mono-, di- or triethylene glycol (C1-C4) alkyl ethers, and combinations thereof.

[0118] Advantageously, the aqueous phase is present in an amount ranging from 60% by weight to 90% by weight, preferably from 65% by weight to 85% by weight, relative to the total weight of the composition. ADDITIONAL INGREDIENTS

[0119] The composition according to the present invention may also comprise any other additional ingredient which is usually used in the field of self-cleaning products, in particular shampoos.

[0120] A person skilled in the art can choose the amount of the additional ingredients so as not to have a negative impact on the final use of the composition according to the present invention.

[0121] For example, such additional ingredients include pH adjusting agents, preservatives, antioxidants, fragrances, electrolytes and stabilizers, plant extracts, proteins, amino acids, vitamins, glycols, emollients, and combinations thereof.

[0122] Non-limiting examples of pH adjusting agents include potassium acetate, potassium hydroxide, sodium carbonate, sodium hydroxide, phosphoric acid, succinic acid, sodium citrate, sodium hydrogen carbonate, and combinations thereof.

[0123] The pH correction agent is used in an amount such that the pH of the composition of the present invention is less than or equal to 6.5, preferably from 2 to 6.5, more preferably from 3.5 to 4.5.

[0124] According to a preferred embodiment, the present invention provides a composition for cleaning the hair comprising, relative to the total weight of the composition:

[0125] a) from 10% by weight to 20% by weight of at least one anionic surfactant;

[0126] b) from 2% by weight to 10% by weight of lactic acid and from 1% by weight to 5% by weight of weight of at least one beta-hydroxy acid selected from salicylic acid, 5-n-octanoyl salicylic acid, 5-n-decanoyl salicylic acid, 5-n-dodecanoyl salicylic acid, 5-n-heptyloxy salicylic acid, 4-n-heptyloxy salicylic acid, and their combination;

[0127] c) from 0.5% by weight to 2% by weight of piroctone olamine; and

[0128] d) from 0.5% by weight to 3% by weight of at least one alpha olefin sulfonate of formula O R~CH—CH—pO M* Ô

[0129] in which:

[0130] - R is a saturated linear alkyl radical comprising from 4 to 20 carbon atoms, in particular from 6 to 18 carbon atoms, or even from 8 to 14 carbon atoms and better still from 10 to 12 carbon atoms;

[0131] - M+ is chosen from Na+ or K+,

[0132] wherein the pH of the composition is from 3.5 to 4.5. Preparation and use

[0133] The composition according to the present invention can be prepared by mixing ingredients a) to d), as essential ingredients, as well as one or more additional ingredients, as explained above.

[0134] The method and means for mixing the above essential and optional ingredients are not limited. Any conventional method and means can be used for mixing the above essential and optional ingredients to prepare the composition according to the present invention.

[0135] The composition according to the present invention may have a gel-like texture.

[0136] According to the second aspect of the present invention, a hair cleansing process comprising applying the composition as described above to the hair, then rinsing with water after an optional exposure period.

[0137] The following examples are given for the purpose of illustration of the present invention and should not be construed as limiting the scope. EXAMPLES

[0138] The main raw materials used, the trade names and the suppliers of these materials are listed in Table 1.

[0139] [Tables 1] INCI Name Trade Name Supplier SODIUM LAURETH SULFATE TEXAPON N 701 BASF SODIUM C14-16 OLEFIN SULFONATE NANSA LSS 38 / FL INNOSPEC ACTIVE CHEMICALS LACTIC ACID L(+)-LACTIC ACID 90% THERMOSTABLE PERSONAL CARE GRADE JUNGBUNZLAUER SALICYLIC ACID SALICYLIC ACID USP ALTA LABORATORIES PIROCTONE OLAMINE PIROCTONE OLAMINE YANTAI AURORA CHEMICAL Sodium Hydroxide SODIUM HYDROXIDE 48% PT. MULIA AGUNG CHEMINDO Inventive Examples 1-2 and Comparative Example 1

[0140] The shampoos according to the examples of the invention (El.) 1-2 and the comparative example (EC.) 1 were prepared with the ingredients listed in Table 2 (the contents are expressed as weight percentages of active ingredient relative to the total weight of each shampoo, unless otherwise indicated):

[0141] [Tables2] Components El. 1 El. 2 CE. 1 SODIUM LAURETH SULFATE 15 15 15 SODIUM C14-16 OLEFIN SULFONATE 1 1 / LACTIC ACID 5.4 5.4 5.4 SALICYLIC ACID 1.5 1.5 1.5 PIROCTONE OLAMINE 0.8 0.5 0.8 SODIUM HYDROXIDE 1.27 1.27 1.27 WATER QS100 QS100 QS100 PH 3.8 3.8 3.8

[0142] The shampoos of inventive examples (EL) 1-2 are compositions according to the present invention.

[0143] The shampoo of Comparative Example (EC.) 1 does not comprise alpha olefin sulfonate.

[0144] Preparation procedure:

[0145] Each shampoo was prepared as follows, taking the shampoo of the invention example 1 for illustration.

[0146] 1). add SODIUM LAURETH SULFATE and OLEFIN SULFONATE SODIUM C14-16 in water and stir at room temperature to obtain a homogeneous mixture,

[0147] 2). add LACTIC ACID and SALICYLIC ACID and PIROCTONE OLAMINE into the homogeneous mixture and stir at room temperature,

[0148] 3). add sodium hydroxide to correct the pH value to 3.8, to obtain the shampoo. Assessment

[0149] The stability and anti-dandruff efficacy of each composition prepared above were characterized. Stability

[0150] The appearance of each composition prepared above after storage at 4 ❖C, room temperature, 37^C or 45^C for 2 months was observed to evaluate the stability of the composition.

[0151] If the appearance of a composition is transparent after two months of storage at both 4^C, room temperature, 37^C and 45^C, the stability is evaluated as "Good". If there is a precipitate (crystal) in the composition after two months of storage at any one of: 4^C, room temperature, 37^C and 45^C, the stability is evaluated as "Not Good".

[0152] The results regarding viscosity and stability were summarized in Table 3.

[0153] [Tables3] Properties EL 1 EL 2 CE. 1 Appearance Transparent Transparent Precipitate Stability Good Good Not Good Anti-dandruff efficacy

[0154] The anti-dandruff efficacy of the compositions of Examples 1 and 2 of the invention as well as of the HS shampoo from the company Procter & Gamble was evaluated according to the standard QB / T 2738-2012: Test methods for the evaluation of the antibacterial and bacteriostatic efficacy of daily chemical products - 7.3 the method for testing the bacteriostatic activity for bacteriostatic daily chemical products (test of quantitative suspension). HS Shampoo contains 0.8% by weight of OCT (PIROCTONE OLAMINE) and is well known for its anti-dandruff effectiveness in the market. In addition, HS Shampoo contains a small amount of citric acid to correct the pH value to about 5.7 to control the preservative system, and HS Shampoo does not contain beta-hydroxy acid.

[0155] Test organism: Malassezia fufur ATCC 44344.

[0156] The anti-dandruff efficacy was summarized in Table 4.

[0157] [Tables4] ELI EI.2 HS Shampoo Anti-dandruff efficacy (%) 5 min 99.9 99.9 2 6

[0158] The results show that the compositions of inventive examples 1 and 2 have better anti-dandruff efficacy than Procter & Gamble HS shampoo.

Claims

Claims

1. A hair cleansing composition comprising: a) at least one anionic surfactant; b) from 2% by weight to 10% by weight of at least one alpha-hydroxy acid and from 1% by weight to 5% by weight of at least one beta-hydroxy acid, relative to the total weight of the composition; c) at least one piroctone compound; and d) at least one alpha olefin sulfonate.

2. Composition according to claim 1, in which the anionic surfactant is chosen from - C6-C24 and in particular C12-C20 alkyl sulfates; - C6-C24 and in particular C12-C20 alkyl ether sulfates; preferably comprising from 2 to 20 ethylene oxide units; - C6-C24 and in particular C12-C20 alkyl sulfosuccinates, in particular lauryl sulfosuccinates; - C6-C24 and in particular C12-C20 alkyl ether sulfosuccinates; - C6-C24 acyl isethionates and preferably C12-C18 acyl isethionates; in particular in the form of salts of alkali metal such as sodium or alkaline earth metal, ammonium or amino alcohol, preferably, the anionic surfactant is chosen from sodium laureth sulfate, sodium lauryl sulfate, and a combination thereof.

3. A composition according to any one of claims 1-2, wherein the alpha-hydroxy acid is selected from lactic acid, glycolic acid, tartaric acid, mandelic acid, citric acid, and combinations thereof, preferably the alpha-hydroxy acid is lactic acid.

4. Composition according to any one of claims 1 to 3, in which the beta-hydroxy acid is chosen from salicylic acid and its derivative of formula: ^c R 0 in which R is a linear, branched or saturated aliphatic group

5. cyclic or an unsaturated aliphatic group containing one or more double bonds, conjugated or not, these groups containing from 2 to 22, preferably from 3 to 11 carbon atoms and which can be substituted for example by at least one substituent chosen from (a) halogen atoms, (b) the trifluoromethyl group, (c) hydroxyl groups in free form or esterified by an acid containing from 1 to 6 carbon atoms or (d) a carboxyl function free or esterified by a lower alcohol containing from 1 to 6 carbon atoms; R' is a hydroxyl group or an ester functional group of the following formula: --OC— Ri O wherein R 1 is a saturated or unsaturated, linear or branched aliphatic group comprising from 1 to 18 carbon atoms, preferably, the beta-hydroxy acid is chosen from salicylic acid, 5-n-octanoyl salicylic acid, 5-n-decanoyl salicylic acid, 5-n-dodecanoyl salicylic acid, 5-n-heptyloxy salicylic acid, 4-n-heptyloxy salicylic acid, and their combination, more preferably, the beta-hydroxy acid is salicylic acid. Composition according to any one of claims 1 to 4, in which the piroctone compound contains the structure defined by formula (III):

6. wherein R2 is selected from C1-C17 alkyl and C2-C17 alkenyl, R3 is selected from C1-C4 alkyl, C2-C4 alkenyl or alkynyl, hydrogen, phenyl or benzyl, and Mi is selected from hydrogen, monoethanolamine (MEA), diethanolamine (DEA), or triethanolamine (TEA), preferably, R2 is (CH3)3CCH2CH(CH3)CH2-, R3 is methyl and Mi is hydrogen or MEA. Composition according to any one of claims 1 to 5, in in which the alpha olefin sulfonate is chosen from linear alpha olefin sulfonates of formula (A): R-CH2-CH=CH-(CH2)n-SO3M in which: - R is a saturated linear alkyl radical comprising from 4 to 30 carbon atoms, in particular from 6 to 20 carbon atoms, or even from 8 to 18 carbon atoms and better still from 10 to 14 carbon atoms; - n is an integer between 0 and 10, preferably between 1 and 4 and better still n = 1; - M is a cosmetically acceptable cation, chosen in particular from the ammonium cation, cations derived from alkali or alkaline-earth metals, cations derived from organic amines such as alkanolamines; preferably those derived from alkali metals; and in particular Na+ or K+.

7. Composition according to claim 6, in which the alpha olefin sulfonate is chosen from those of the following formula: Q 0 in which: - R is a saturated linear alkyl radical comprising from 4 to 20 carbon atoms, in particular from 6 to 18 carbon atoms, or even from 8 to 14 carbon atoms and better still from 10 to 12 carbon atoms; - M is a cosmetically acceptable cation, chosen in particular from the ammonium cation, cations derived from alkali or alkaline-earth metals, cations derived from organic amines such as alkanolamines; preferably those derived from alkali or alkaline-earth metals; and better still Na+ or K+.

8. Composition according to any one of claims 1-7, wherein the pH of the composition is from 2 to 6.5, preferably from 3.5 to 4.

5.

9. Composition according to claim 1, comprising, relative to the total weight of the composition: a) from 10% by weight to 20% by weight of at least one anionic surfactant b) from 2% by weight to 10% by weight of lactic acid and from 1% by weight to 5% by weight of at least one beta-hydroxy acid chosen from sa- licylic acid, 5-n-octanoyl salicylic acid, 5-n-decanoyl salicylic acid, 5-n-dodecanoyl salicylic acid, 5-n-heptyloxy salicylic acid, 4-n-heptyloxy salicylic acid, and combinations thereof; c) from 0.5% by weight to 2% by weight of piroctone olamine; and d) from 0.5% by weight to 3% by weight of at least one alpha olefin sulfonate of formula: O R~CH— CH^CH—CH—SO M* O in which: - R is a saturated linear alkyl radical comprising from 4 to 20 carbon atoms, in particular from 6 to 18 carbon atoms, or even from 8 to 14 carbon atoms and better still from 10 to 12 carbon atoms; - M+ is chosen from Na+ or K+, in which the pH of the composition is 3.5 to 4.

5.

10. A method of cleansing hair comprising applying the composition of any one of claims 1-9 to the hair and then rinsing the hair with water after an optional exposure period.