COMPOSITION COMPRISING A cationic polymer selected from chitosans, an anionic surfactant, and propionic acid or one of its salts

Abstract

COMPOSITION COMPRISING A CATIONIC POLYMER SELECTED FROM CHITOSANS, AN ANIONIC SURFACTANT, AND PROPIONIC ACID OR ONE OF ITS SALTS. The present invention relates to a composition comprising: (a) at least one cationic polymer; (b) at least one anionic surfactant; and (c) propionic acid or one of its salts, wherein the (a) cationic polymer is selected from chitosans with a molecular weight greater than 3,000, preferably greater than 5,000, and more preferably greater than 10,000. The composition according to the present invention can form coacervates. Figure for the abstract: none

Description

Title of the invention: Composition comprising a cationic polymer selected from chitosans, an anionic surfactant, and propionic acid or one of its salts. Technical field

[0001] The present invention relates to a composition comprising at least one cationic polymer selected from chitosans, at least one anionic polymer, and propionic acid or one of its salts, as well as a cosmetic process using the composition. CONTEXT OF THE INVENTION

[0002] Cleansing the hair or scalp is important for hair and scalp care. Various shampoos can be used as cleansing products for the hair and scalp. Cleansing products such as shampoos typically include surfactants to remove sebum and similar substances from the hair and scalp.

[0003] Certain cleansing products, such as shampoos, also include cosmetic active ingredient(s) as well as ingredients for forming coacervates, which are useful for depositing the cosmetic active ingredient(s) onto the hair and scalp. Coacervates generally form when cleansing products such as shampoos are diluted with water and capture the cosmetic active ingredient(s). The coacervates formed can be deposited onto the hair and scalp. When the coacervates are deposited onto the hair and scalp, the captured cosmetic active ingredient(s) can also be deposited onto the hair and scalp to provide cosmetic effects.

[0004] It is known that a cationic polymer and an ionic surfactant can form a complex called a coacervate. For example, document WO 2018 / 052920 discloses the formation of a coacervate by hydroxypropyltrimonium guar chloride and sodium lauryl sulfate.

[0005] Furthermore, the formulation of environmentally friendly cosmetic products, which are designed and developed with environmental considerations in mind, is becoming a major objective in an effort to address global challenges. It is therefore essential to offer more sustainable compositions, preparation processes, and ingredients to meet these environmental concerns.

[0006] In this context, it is important to develop new cosmetic compositions with a better carbon footprint, in particular by promoting the use of renewable raw materials and / or materials with a good naturalness index and / or materials of natural origin. DISCLOSURE OF THE INVENTION

[0007] Indigenous skin bacteria such as Staphylococcus epidermidis (S. epidermidis) and Cutibacterium acnes (C. acnes) digest sebum and produce propionic acid, which plays an important role in maintaining skin pH and has antimicrobial properties. Therefore, propionic acid or one of its salts such as sodium propionate (NaP) would be a promising cosmetic active ingredient for rebalancing the conditions of the skin and scalp.

[0008] In the case of the application of propionates to a keratinous material such as the scalp, the use of coacervates would be useful to efficiently deposit propionic acid or one of its salts on the keratinous material.

[0009] Thus, an objective of the present invention is to propose a composition that can form coacervates.

[0010] The above objective of the present invention can be achieved by a composition, preferably a cosmetic composition, more preferably a cosmetic composition for a keratinous material such as the scalp, and even more preferably a shampoo composition, comprising: a. at least one cationic polymer; b. at least one anionic surfactant; and c. of propionic acid or one of its salts,

[0011] in which

[0012] the (a) cationic polymer is chosen from chitosans with a molecular weight greater than 3,000, preferably greater than 5,000, and more preferably, greater than 10,000.

[0013] The molecular weight of the (a) cationic polymer may be less than 2,000,000, preferably less than 1,500,000 and, more preferably, less than 1,000,000.

[0014] The quantity of the (a) cationic polymer(s) in the composition according to the present invention can be from 0.001% to 15% by weight, preferably from 0.005% to 10% by weight, and more preferably from 0.01% to 5% by weight, relative to the total weight of the composition.

[0015] It may be preferable that the (b) anionic surfactant be chosen from alkyl sulfates, alkyl ether sulfates, and mixtures thereof.

[0016] It may be more preferable that the (b) anionic surfactant be chosen from among the (C6-C 3o)alkyl ether sulfates such as sodium laureth sulfate.

[0017] The quantity of the (b) anionic surfactant(s) in the composition according to the present invention may be from 1% to 25% by weight, preferably from 5% to 20% by weight. weight, and more preferably 0% to 15% by weight, relative to the total weight of the composition.

[0018] The quantity of (c) propionic acid or one of its salts in the composition according to the present invention can be from 0.01% to 15% by weight, preferably from 0.05% to 10% by weight, and more preferably from 0.1% to 5% by weight, relative to the total weight of the composition.

[0019] The composition according to the present invention may further comprise (d) at least one amphoteric surfactant.

[0020] The (d) amphoteric surfactant may be selected from betaine-type surfactants, preferably from alkylbetaines, alkylsulfobetaines, alkylamidoalkylbetaines, and mixtures thereof, and more preferably from cocobetaine, sulfopropylbetaine, cocamidopropylbetaine, and mixtures thereof.

[0021] The quantity of the amphoteric surfactant(s) in the composition according to the present invention can be from 0.1% to 15% by weight, preferably from 0.5% to 10% by weight and, more preferably, from 1% to 5% by weight, relative to the total weight of the composition.

[0022] The composition according to the present invention may comprise (e) at least one monovalent non-polymeric acid or one of its salts.

[0023] The (e) monovalent non-polymer acid may be a monovalent non-polymer organic acid, preferably a monovalent non-polymer carboxylic acid and, more preferably, a monovalent hydroxy acid such as lactic acid and salicylic acid.

[0024] The composition according to the present invention may further comprise (f) at least one inorganic salt.

[0025] The composition according to the present invention may further comprise (g) at least one non-polymeric acid having two or more of two pKa values ​​or one of its salts.

[0026] The present invention also relates to a cosmetic process for a keratinous material such as the scalp, comprising

[0027] the application to keratinous material of the composition according to the present invention; and

[0028] rinsing of the keratinous material composition. Best embodiment of the invention

[0029] After careful research, the inventors discovered that it is possible to propose a composition that can form coacervates.

[0030] Thus, the composition according to the present invention comprises: a. at least one cationic polymer; b. at least one anionic surfactant; and c. of propionic acid or one of its salts,

[0031] in which

[0032] the (a) cationic polymer is chosen from chitosans with a molecular weight greater than 3,000, preferably greater than 5,000, and more preferably, greater than 10,000.

[0033] The composition according to the present invention can form coacervates. In particular, coacervates can be formed when the composition according to the present invention is diluted with water.

[0034] Coacervate here refers to a complex formed by the (a) cationic polymer and the (b) anionic surfactant.

[0035] The (a) cationic polymer and the (b) anionic surfactant can form coacervates that may include (c) propionic acid or one of its salts. The coacervates can be deposited on keratinous material such as the scalp. Thus, the composition according to the present invention could increase the amount of (c) propionic acid or one of its salts on the keratinous material. The increased amount of (c) propionic acid or one of its salts on the keratinous material could contribute to the revitalization of the keratinous material by, for example, correcting the pH of the keratinous material and providing the keratinous material with antimicrobial and antidandruff effects.

[0036] Coacervates can also be deposited on keratinous fibers such as hair to provide a smooth feel during use.

[0037] Since chitosans can be obtained from natural resources, (a) the cationic polymer is environmentally friendly. Therefore, the composition according to the present invention may include an environmentally friendly ingredient.

[0038] The composition according to the present invention can be particularly useful for both hair and skin, and especially for the scalp. Thus, it is preferable that the composition according to the present invention be used as a shampoo.

[0039] The present invention will be explained in more detail below. [Composition]

[0040] The composition according to the present invention comprises: a. at least one cationic polymer; b. at least one anionic surfactant; and c. of propionic acid or one of its salts,

[0041] in which

[0042] the (a) cationic polymer is chosen from chitosans with a molecular weight greater than 3,000, preferably greater than 5,000, and more preferably, greater than 10,000. (Cationic Polymer)

[0043] The composition according to the present invention comprises (a) at least one cationic polymer selected from chitosans of a molecular weight greater than 3,000.

[0044] There is no limit to the type of (a) cationic polymer as long as it is chosen from a certain class of chitosans. Two or more different types of cationic polymers may be used in combination. Thus, a single type of cationic polymer or a combination of different types of cationic polymers may be used.

[0045] A cationic polymer has a positive charge density. The charge density of (a) the cationic polymer can be between 0.01 meq / g and 20 meq / g, preferably between 0.05 and 15 meq / g, and more preferably between 0.1 and 10 meq / g.

[0046] According to the present invention, the (a) cationic polymer is selected from chitosans with a molecular weight (Da) greater than 3,000, preferably greater than 5,000, and more preferably greater than 10,000.

[0047] The molecular weight (Da) of the (a) cationic polymer may be less than 2,000,000, preferably less than 1,500,000 and, more preferably, less than 1,000,000.

[0048] Thus, the molecular weight (Da) of the (a) cationic polymer can be greater than 3,000 and less than 2,000,000, preferably greater than 5,000 and less than 1,500,000, and more preferably greater than 10,000 and less than 1,000,000.

[0049] Unless otherwise specified in the descriptions, "molecular weight" means an average molecular weight by weight. The molecular weight can be measured or determined by gel permeation chromatography, for example in accordance with ASTM D5296-19.

[0050] Chitosan is very rare in nature. It is only reported in the exoskeletons of certain insects such as termite queens and in the cell walls of a particular class of fungi, the zygomycetes.

[0051] Chitosan can be obtained by deacetylation of chitin. Chitin is a polysaccharide composed of several N-acetyl-D-glucosamine motifs linked together by a [3 (1,4) type bond.

[0052] The ideal chemical structure of chitosan is a sequence of [>-D-glucosamine] monomers linked by a glycosidic bond (1—>4).

[0053] The "chitosan" according to the present invention refers to any copolymer formed from constituent N-acetyl-D-glucosamine and D-glucosamine motifs, the degree of acetylation of which is less than 90%, preferably less than 80%, preferably less than 70%, preferably less than 60%, preferably less than 50%. Chitosan consists of glucosamine sugar motifs (deacetylated motifs) and N-acetyl-D-glucosamine motifs (acetylated motifs) linked together by [3(1,4)] type bonds and is a Poly(N-acetyl-D-glucosamine)-poly(D-glucosamine) polymer.

[0054] More preferably, the degree of acetylation of chitosan is less than or equal to 40%, preferably less than or equal to 35%, preferably less than or equal to 25%, preferably less than or equal to 15%, and preferably less than or equal to 10%.

[0055] The degree of acetylation is the percentage of acetylated motifs relative to the total number of motifs; it can be determined by Fourier transform infrared spectroscopy (FTIR) or by titration with a strong base.

[0056] The chitosan of the present invention is preferably a polysaccharide prepared from a fungal source. In particular, it is extracted and purified from safe and abundant foods or from biotechnological fungal sources such as Agaricus bisporus or Aspergillus niger.

[0057] The chitosan of the present invention is preferably derived from the mycelium of an Ascomycete fungus, and in particular Aspergillus niger, and / or a Basidiomycete fungus, and in particular Lentinula edodes (shiitake) and / or Agaricus bisporus. Preferably, the fungus is Aspergillus niger.

[0058] Chitosan may be of GMO (Genetically Modified Organisms) origin, but it is preferably of non-GMO origin.

[0059] The chitosan according to the present invention is native, that is to say, it is not modified. In particular, it contains no chemical modification.

[0060] One method for preparing chitosan is that described in document WO03 / 068824.

[0061] Preferably, the chitosan used in the present invention is in powder form. It is marketed by Kitozyme under the name Kiosmetine or Kionutrime, for example Kiosmetine-CSH, Kiosmetine CSG and Kiosmetine P.

[0062] The quantity of the (a) cationic polymer(s) in the composition according to the present invention may be 0.001% by weight or more, preferably 0.005% by weight or more, and, more preferably 0.01% by weight or more, relative to the total weight of the composition.

[0063] Furthermore, the quantity of the (a) cationic polymer(s) in the composition according to the present invention may be 15% by weight or less, preferably 10% by weight or less, and more preferably 5% by weight or less, relative to the total weight of the composition.

[0064] Thus, the quantity of the (a) cationic polymer(s) in the composition according to the present invention can be from 0.001% to 15% by weight, preferably from 0.005% to 10% by weight, and more preferably from 0.01% to 5% by weight, relative to the total weight of the composition. (Anionic surfactant)

[0065] The composition according to the present invention comprises (b) at least one anionic surfactant. Only one type of anionic surfactant may be used, but two or more different types of anionic surfactants may be used in combination.

[0066] The (b) anionic surfactant may be selected from anionic derivatives of plant-based or silk-based proteins, phosphates and alkyl phosphates, carboxylates, sulfosuccinates, amino acid derivatives, alkyl sulfates, alkyl ether sulfates, sulfonates, isethionates, taurates, alkyl sulfoacetates, polypeptides, anionic derivatives of alkyl polyglucosides, and mixtures thereof. 1. Anionic derivatives of plant-based proteins are protein hydrolysates comprising a hydrophobic group, said hydrophobic group being either naturally present in the protein or added by reaction of the protein and / or the protein hydrolysate with a hydrophobic compound. The proteins are of plant origin or derived from silk, and the hydrophobic group may, in particular, be a fatty chain, for example, an alkyl chain comprising 10 to 22 carbon atoms. Examples of anionic derivatives of plant-based proteins include hydrolysates of apple, wheat, soybean, or oat proteins comprising an alkyl chain having 10 to 22 carbon atoms, and their salts. The alkyl chain may, in particular, be a lauryl chain, and the salt may be a sodium, potassium, and / or ammonium salt.

[0067] Thus, examples of protein hydrolysates comprising a hydrophobic group include, for instance, protein hydrolysate salts where the protein is a silk protein modified by lauric acid, such as the product sold under the name Kawa Silk by Kawaken; protein hydrolysate salts where the protein is a wheat protein modified by lauric acid, such as the potassium salt sold under the name Aminofoam W OR by Croda (CTFA name: potassium lauroyl wheat amino acids) and the sodium salt sold under the name Proteol LW 30 by Seppic (CTFA name: sodium lauroyl wheat amino acids);Protein hydrolysate salts where the protein is an oat protein comprising an alkyl chain having 10 to 22 carbon atoms, and more particularly protein hydrolysate salts where the protein is an oat protein modified with lauric acid, such as the sodium salt sold under the name Proteol OAT (30% aqueous solution) by Seppic (CTFA name: sodium lauroyl oat amino acids); or apple protein hydrolysate salts comprising an alkyl chain having 10 to 22 carbon atoms, such as the sodium salt sold under the name Proteol APL (30% aqueous / glycol solution) by Seppic (CTFA name: sodium cocoyl apple amino acids). One can also mention the mixture of lauroyl amino acids (aspartic acid, glutamic acid, glycine, alanine); neutralized with sodium N-methylglycinate sold under the name Proteol SAV 50 S by Seppic (CTFA name: sodium cocoyl amino acids). 1. Examples of phosphates and alkyl phosphates include monoalkyl and dialkyl phosphates, such as lauryl monophosphate, sold under the name MAP 20® by Kao Chemicals; potassium salt of dodecyl phosphate; mixture of mono- and diesters (mainly diester) sold under the name Crafol AP-31® by Cognis; mixture of octyl phosphate monoester and diester, sold under the name Crafol AP-20® by Cognis; mixture of ethoxylated 2-butyloctyl phosphate monoester and diester (7 mol EO), sold under the name Isofol 12 7 EO-Phosphate Ester® by Condea; and potassium or triethanolamine salt of C12-C13 monoalkyl phosphate, sold under the references Arlatone MAP 230K-40® and Arlatone MAP 230T-60® by Uniqema, potassium lauryl phosphate, sold under the name Dermalcare MAP XC-99 / 09® by Rhodia Chimie, and potassium cetyl phosphate, sold under the name Arlatone MAP 160K by Uniqema. 2. Examples of carboxylates include:

[0068] - amido ether carboxylates (AECs), such as lauryl amido ether carboxylate of sodium (3 EO), sold under the name Akypo Foam 30® by Kao Chemicals;

[0069] - polyoxyethylenated carboxylic acid salts, such as lauryl ether carboxylate of oxyethylenated sodium (6 EO) (65 / 25 / 10 C12-C14-C16), sold under the name Akypo Soft 45 NV® by Kao Chemicals, polyoxyethylenated and carboxymethylated fatty acids from olive oil, sold under the name Olivem 400® by Biologia E Tecnologia, or oxyethylenated sodium tridecyl ether carboxylate (6 EO), sold under the name Nikkol ECTD-6NEX® by Nikkol; and

[0070] - fatty acid salts (soaps) having an alkyl chain at C6 to C22 which are neutralized with an organic or inorganic base, such as potassium hydroxide, sodium hydroxide, triethanolamine, N-methylglucamine, lysine and arginine. 1. Examples of amino acid derivatives include alkali salts of amino acids, such as:

[0071] - sarcosinates, such as sodium lauroyl sarcosinate, sold under the name Sarkosyl NL 97® by Ciba or sold under the name Oramix L 30® by Seppic, sodium myristoyl sarcosinate, sold under the name Nikkol Sarcosinate MN® by Nikkol, or sodium palmitoyl sarcosinate, sold under the name Nikkol Sarcosinate PN® by Nikkol;

[0072] - alaninates, such as sodium N-lauroyl-N-methylamidopropionate, sold under the name Sodium Nikkol Alaninate LN 30® by Nikkol or sold under the name Alanone ALE® by Kawaken, or triethanolamine N-lauroyl-N-methylalanine, sold under the name Alanone ALTA® by Kawaken;

[0073] - glutamates, such as triethanolamine monococoyl glutamate, sold under the Acylglutamate CT-12® by Ajinomoto, triethanolamine lauroyl glutamate, sold under the name Acylglutamate LT-12® by Ajinomoto;

[0074] - aspartates, such as the mixture of N-lauroyl aspartate and triethanolamine of triethanolamine N-myristoylaspartate, sold under the name Asparack® by Mitsubishi;

[0075] - glycine derivatives (glycinates), such as sodium N-cocoyl glycinate, sold under the names Amilite GCS-12® and Amilite GCK 12 by Ajinomoto;

[0076] - citrates, such as the citric monoester of oxyethylenated coconut alcohols (9 mol), sold under the name Witconol EC 1129 by Goldschmidt; and

[0077] - galacturonates, such as sodium dodecyl-galactoside-uronate, sold by Solidarity. 1. Examples of sulfosuccinates include, for example, oxyethylenated (3 EO) lauryl (70 / 30 Ci2 / Ci4) alcohol monosulfosuccinate, sold under the names Setacin 103 Special® and Rewopol SB-FA 30 K 4® by Witco; the disodium salt of a Ci2-C U alcohol hemisulfosuccinate, sold under the name Setacin F Special Paste® by Zschimmer Schwarz; oxyethylenated (2 EO) disodium oleamidosulfosuccinate, sold under the name Standapol SH 135® by Cognis; oxyethylenated (5 EO) lauramide monosulfosuccinate, sold under the name Lebon A-5000® by Sanyo; and oxyethylenated (10 EO) lauryl citrate monosulfosuccinate, sold under the name Rewopol SB CS 50® by Witco, or ricinoleic monoethanolamide monosulfosuccinate, sold under the name Rewoderm S 1333® by Witco. Polydimethylsiloxane sulfosuccinates can also be used, such as disodium PEG-12 dimethicone sulfosuccinate, sold under the name Mackanate-DC 30 by MacIntyre. 2. Examples of alkyl sulfates include triethanolamine lauryl sulfate (CTFA name: TEA lauryl sulfate), such as the product sold by Huntsman under the name Empicol TL40 FL or the product sold by Cognis under the name Texapon T42, which are 40% aqueous solutions. Ammonium lauryl sulfate (CTFA name: ammonium lauryl sulfate), such as the product sold by Huntsman under the name Empicol AL 30FL, which is 30% in aqueous solution. 3. Examples of alkyl ether sulfates include sodium lauryl ether sulfate (CTFA name: sodium laureth sulfate), such as that sold under the names Texapon N40 and Texapon AOS 225 UP by Cognis, or ammonium lauryl ether sulfate (CTFA name: ammonium laureth sulfate), such as that sold under the name Standapol EA-2 by Cognis. 4. Examples of sulfonates include α-olefinesulfonates, such as sodium α-olefinesulfonate (Ci4-Ci6), sold under the name Bio-Terge AS-40® by Stepan, sold under the names Witconate AOS Protégé® and Sulframine AOS PH 12® by Witco or sold under the name Bio-Terge AS-40 CG® by Stepan, secondary sodium olefinesulfonate, sold under the name Hostapur SAS 30® by Clariant; or linear alkylarylsulfonates, such as sodium xylenesulfonate, sold under the names Manrosol SXS30®, Manrosol SXS40® and Manrosol SXS93® by Manro. 5. Examples of isethionates include acylisethionates, such as sodium cocoylisethionate, such as the product sold under the name Jordapon CI P® by Jordan. 6. Examples of taurates include the sodium salt of palm kernel oil methyltaurate, sold under the name Hostapon CT Pâté® by Clariant; N-acyl-N-methyltaurates, such as sodium N-cocoyl-N-methyltaurate, sold under the name Hostapon LT-SF® by Clariant or sold under the name Nikkol CMT-30-T® by Nikkol, sodium methylstearoyl taurate sold under the name Nikkol SMT® or sodium palmitoyl methyltaurate, sold under the name Nikkol PMT® by Nikkol. 7. Anionic derivatives of alkyl polyglucosides can notably be Citrates, tartrates, sulfosuccinates, carbonates and glycerol ethers obtained from alkyl polyglucosides. Examples include the sodium salt of (1,4) tartaric cocoylpolyglucoside ester, sold under the name Eucarol AGE-ET® by Cesalpinia, the disodium salt of (1,4) sulfosuccinic cocoylpolyglucoside ester, sold under the name Essai 512 MP® by Seppic, and the sodium salt of (1,4) citric cocoylpolyglucoside ester, sold under the name Eucarol AGE-EC® by Cesalpinia.

[0078] Preferably, (b) the anionic surfactant is not a soap. Therefore, preferably, (b) the anionic surfactant can be selected from synthetic anionic surfactants. More preferably, (b) the anionic surfactant can be selected from amino acid derivatives; alkyl sulfates; alkyl ether sulfates; olefin sulfonates and acylisethionates; and mixtures thereof. More preferably, the (b) anionic surfactant may be selected from amino acid derivatives, alkyl ether sulfates, and mixtures thereof.

[0079] In particular, the (b) anionic surfactant may be selected from the group consisting of:

[0080] sodium laureth sulfate, ammonium laureth sulfate, disodium lauryl sulfosuccinate, disodium laureth sulfosuccinate, diammonium lauryl sulfosuccinate, sodium diethylhexyl sulfosuccinate, sodium oleyl succinate, sodium lauroyl methyl isethionate, sodium lauryl isethionate, sodium cocoyl isethionate, sodium laureth-5 carboxylate, lauryl ether carboxylic acid, ammonium lauryl sulfate, triethylamine lauryl sulfate, triethylamine laureth sulfate, triethanolamine lauryl sulfate, triethanolamine laureth sulfate, triethanolamine laureth sulfate, monoethanolamine lauryl sulfate, monoethanolamine laureth sulfate, diethanolamine lauryl sulfate, diethanolamine laureth sulfate, sodium lauryl monoglyceride sulfate, lauryl sulfate sodium, potassium lauryl sulfate, potassium laureth sulfate, ammonium cocoyl sulfate, ammonium lauroyl sulfate, sodium cocoyl sulfate,Sodium lauroyl sulfate, potassium cocoyl sulfate, monoethanolamine cocoyl sulfate, sodium tridecyl benzene sulfonate, sodium dodecyl benzene sulfonate, a C14-16 sodium olefin sulfonate, sodium lauryl sarcosinate, sodium lauroyl sarcosinate, stearoyl sarcosine, lauryl sarcosine, cocoyl sarcosine, sodium methyl cocoyl taurate, sodium methyl lauroyl taurate, sodium lauroyl glutamate, sodium cocoyl glutamate, disodium cocoyl glutamate, potassium myristoyl glutamate, TEA cocoyl glutamate, sodium cocoyl glycinate, potassium cocoyl glycinate, sodium cocoyl alaninate, TEA cocoyl alaninate, and mixtures thereof.

[0081] It may be preferable that the (b) anionic surfactant be chosen from alkyl sulfates, alkyl ether sulfates, and mixtures thereof.

[0082] It may be more preferable for the (b) anionic surfactant to be chosen from among the (C6-C 3o)alkyl ether sulfates such as sodium laureth sulfate.

[0083] The quantity of the (b) anionic surfactant(s) in the composition according to the present invention may be 1% by weight or more, preferably 5% by weight or more, and more preferably 10% by weight or more, relative to the total weight of the composition.

[0084] Furthermore, the quantity of the (b) anionic surfactant(s) in the composition according to the present invention may be 25% by weight or less, preferably 20% in weight or less, and more preferably 15% by weight or less, relative to the total weight of the composition.

[0085] Thus, the quantity of the (b) anionic surfactant(s) in the composition according to the present invention can range from 1% to 25% by weight, preferably from 5% to 20% by weight, and more preferably from 10% to 15% by weight, relative to the total weight of the composition. (Propionic acid or its salt)

[0086] The composition according to the present invention comprises (c) propionic acid or one of its salts. Only one type of propionic acid salt may be used, but two or more different types of propionic acid salts may be used in combination.

[0087] The term "salt" herein means a salt formed by the addition of suitable base(s) to propionic acid, which can be obtained from a reaction of propionic acid with the base(s) according to processes known to those skilled in the art. Examples of salts include metal salts, for example alkali metal salts such as Na and K, alkaline earth metal salts such as Mg and Ca, and ammonium salts.

[0088] It is preferable to use, as ingredient (c), an alkali metal salt of propionic acid, and more preferably sodium propionate.

[0089] The amount of (c) propionic acid or its salt(s) in the composition according to the present invention may be 0.01% by weight or more, preferably 0.05% by weight or more, and more preferably 0.1% by weight or more, relative to the total weight of the composition.

[0090] Furthermore, the quantity of (c) propionic acid or its salt(s) in the composition according to the present invention may be 15% by weight or less, preferably 10% by weight or less, and more preferably 5% by weight or less, relative to the total weight of the composition.

[0091] Thus, the quantity of (c) propionic acid or its salt(s) in the composition according to the present invention can range from 0.01% to 15% by weight, preferably from 0.05% to 10% by weight and more preferably from 0.1% to 5% by weight, relative to the total weight of the composition. (Amphoteric surfactant)

[0092] The composition according to the present invention may comprise (d) at least one amphoteric surfactant. Only one type of amphoteric surfactant may be used, but two or more different types of amphoteric surfactants may be used in combination.

[0093] Amphoteric or zwitterionic surfactants may be, for example (non-limiting list), amine derivatives such as aliphatic secondary or tertiary amines, and possibly quaternized amine derivatives, in which the aliphatic radical is a linear or branched chain including 8 to 22 carbon atoms and containing at least one water-soluble anionic group (e.g., carboxylate, sulfonate, sulfate, phosphate or phosphonate).

[0094] The (d) amphoteric surfactant may preferably be chosen from the group consisting of betaines and amidoaminecarboxylated derivatives.

[0095] It is preferable that the (d) amphoteric surfactant be chosen from betaine-type surfactants.

[0096] The amphoteric surfactant of the betaine type is preferably chosen from the group consisting of the alkylbetaines, alkylamidoalkylbetaines, sulfobetaines, alkylsulfobetaines, phosphobetaines, alkylphosphobetaines and alkylamidoalkylsulfobetaines, in particular, (C8-C24)alkylbetaines, (C8-C24)alkylamido(Ci-C8)alkylbetaines, sulfobetaines, (Ci-C8)alkylsulfobetaines, phosphobetaines, (Ci-C8)alkylphosphobetaines and (C8-C24)alkylamido(Ci-C8)alkylsulfobetaines. In one embodiment, amphoteric surfactants of the betaine type are selected from (C8-C24)alkylbetaines, (C8-C24)alkylamido(Ci-C8)alkylsulfobetaines, sulfobetaines, (Ci-C8)alkylsulfobetaines and phosphobetaines.

[0097] Non-limiting examples that may be cited include compounds classified in the CTFA International Cosmetic Ingredient Dictionary & Handbook, 15th edition, 2014, under the names cocobetaine, laurylbetaine, cetylbetaine, coco / oleamidopropylbetaine, cocamidopropylbetaine, palmitamidopropylbetaine, stearamidopropylbetaine, cocamidoethylbetaine, cocamidopropylhydroxysultaine, oleamidopropylhydroxysultaine, cocohydroxysultaine, laurylhydroxysultaine and cocosultaine, alone or in mixtures.

[0098] The amphoteric surfactant of the betaine type (betaines) is preferably an alkylbetaine, an alkylsulfobetaine, and an alkylamidoalkylbetaine, in particular cocobetaine, sulfopropylbetaine and cocamidopropylbetaine.

[0099] Among the derivatives of carboxylated amidoamine, one can cite the products sold under the name Miranol, as described in US patents Nos. 2,528,378 and 2,781,354 and classified in the CTFA dictionary, 3rd edition, 1982 (the disclosures of which are incorporated herein by reference), under the names amphocarboxyglycinates and amphocarboxypropionates, with the respective structures:

[0100] RrCONHCH2CH2-N+(R2)(R3)(CH2COO) M+

[0101] in which:

[0102] Ri designates an alkyl radical of an acid Ri-COOH present in hydrolyzed coconut oil, a heptyl, nonyl or undecyl radical,

[0103] R2 designates a beta-hydroxyethyl group,

[0104] R3 designates a carboxymethyl group,

[0105] M+ designates a cationic ion derived from alkali metals such as sodium; an ammonium ion; or an ion derived from an organic amine;

[0106] X designates an organic or inorganic anionic ion such as halides, acetates, phosphates, nitrates, alkyl(Ci-C4)sulfates, alkyl(Ci-C4)- or alkyl(Ci-C4)aryl-sulfonates, in particular methyl sulfate and ethyl sulfate; or M+ and X are not present;

[0107] Rf-CONCH^Hz-NCB)^) (B2)

[0108] in which:

[0109] - R / denotes an alkyl radical of an acid Ri'-COOH present in coconut oil or in hydrolyzed linseed oil, an alkyl radical, such as a C7, C9, Cn or C13 alkyl radical, a Cn alkyl radical and its isoform, or an unsaturated Cn radical,

[0110] - B represents -CH2CH2OX',

[0111] - C represents -(CH2)Z-Y', with z=l or 2,

[0112] - X' denotes a group -CH2-COOH, -CH2-COOZ', -CH2CH2-COOH, -CH2CH2- COOZ' or a hydrogen atom, and

[0113] - Y' denotes a radical -COOH, -COOZ', -CH2-CHOH-SO3Z', -CH2-CHOH-SO3H or a radical -CH2-CH(OH)-SO3-Z',

[0114] in which Z' represents an ion of an alkali or alkaline earth metal such as sodium, an ion derived from an organic amine or an ammonium ion;

[0115] and

[0116] Ra-NH-CH(Y”)-(CH2)nC(O)-NH-(CH2)nN(Rd)(Re) (B'2)

[0117] in which:

[0118] - Y" denotes -C(O)OH, -C(O)OZ", -CH2-CH(OH)-SO3H or -CH2-CH(OH)-SO3- Z", in which Z" denotes a cationic ion derived from an alkali or alkaline earth metal such as sodium, an ion derived from an organic amine, or an ammonium ion;

[0119] - Rd and Re denote an alkyl radical in CrC4 or hydroxyalkyl in CrC4;

[0120] - Ra designates an alkyl or alkenyl group in the C10-C3 form of an acid, and

[0121] - n and n' independently denote an integer from 1 to 3.

[0122] It is preferable that the (d) amphoteric surfactant of formula B1 and B2 be chosen from (C8-C24)-alkyl amphomonoacetates, (C8-C24)alkyl amphodiacetates, (C8-C24)alkyl amphomonopropionates and (C8-C24)alkyl amphodipropionates.

[0123] These compounds are listed in the CTFA dictionary, 5th edition, 1993, under the names Disodium Cocoamphodiacetate, Disodium Lauroamphodiacetate, Disodium Caprylamphodiacetate, Disodium Capryloamphodiacetate, Disodium Cocoamphodipropionate, Disodium Lauroamphopropionate, Disodium Caprylamphodipropionate, Disodium Caprylamphodipropionate, Lauroamphodipropionic acid and Cocoamphodipropionic acid.

[0124] As an example, we can cite cocoamphodiacetate sold by the company Rhodia Chimie under the trade name Miranol® C2M Concentrate.

[0125] Among the compounds of formula (B'2), we can mention sodium diethylaminopropyl cocoaspartamide (CTFA) marketed by CHIMEX under the name CHIMEXANE HB.

[0126] In one embodiment, the (d) amphoteric surfactant may be selected from N-acylaminated acids such as N-alkyl aminoacetates and disodium cocoamphodiacetate, and amine oxides such as stearamine oxide and lauramine oxide.

[0127] It is preferable that the (d) amphoteric surfactant be chosen from among betaine-type surfactants, more preferably from among alkylbetaines, alkylsulfobetaines, alkylamidoalkylbetaines, and mixtures thereof, and even more preferably from cocobetaine, sulfopropylbetaine, cocamidopropylbetaine, and mixtures thereof.

[0128] The quantity of the (d) amphoteric surfactant(s) in the composition according to the present invention may be 0.1% by weight or more, preferably 0.5% by weight or more, and more preferably 1% by weight or more, relative to the total weight of the composition.

[0129] Furthermore, the quantity of the (d) amphoteric surfactant(s) in the composition according to the present invention may be 15% by weight or less, preferably 10% by weight or less, and more preferably 5% by weight or less, relative to the total weight of the composition.

[0130] Thus, the quantity of the amphoteric surfactant(s) in the composition according to the present invention can range from 0.1% to 15% by weight, preferably from 0.5% to 10% by weight, and more preferably from 1% to 5% by weight, relative to the total weight of the composition.

[0131] (Monovalent non-polymer acid or salt thereof)

[0132] The composition according to the present invention may comprise (e) at least one monovalent non-polymeric acid or one of its salts. Two or more different types of monovalent non-polymeric acids or their salts may be used in combination. Thus, a single type of monovalent non-polymeric acid or one of its salts, or a combination of different types of monovalent non-polymeric acids or their salts, may be used.

[0133] The term "non-polymer" here means that the acid is not obtained by polymerization of two or more monomers. Therefore, a non-polymer acid does not correspond to an acid obtained by polymerization of two or more monomers, such as acrylic polyacids.

[0134] The term "salt" here refers to a salt formed by the addition of one or more suitable base(s) to the monovalent non-polymeric acid, which can be obtained from a reaction with the monovalent non-polymer acid with the base(s) according to methods known to those skilled in the art. Examples of salts include metal salts, for example alkali metal salts such as Na and K, alkaline earth metal salts such as Mg and Ca, and ammonium salts.

[0135] Preferably the molecular weight of the (e) monovalent non-polymeric acid or one of its salts is less than or equal to 1000, preferably less than or equal to 500 and, more preferably, less than or equal to 100.

[0136] The (e) monovalent non-polymeric acid or one of its salts can promote the dissolution of the (a) cationic polymer in water.

[0137] The (e) monovalent non-polymeric acid or one of its salts may be chosen from monovalent organic or inorganic acids and their salts, preferably monovalent organic acids and their salts, and more preferably monovalent carboxylic acids and their salts.

[0138] The monovalent non-polymeric acid has a single acid group which can be selected from the group consisting of a carboxylic group, a sulfuric group, a sulfonic group, a phosphoric group, a phosphonic group and a mixture thereof.

[0139] The monovalent non-polymer acid may be chosen from among the hydroxy acids, and preferably the alpha-hydroxy acids. Examples of alpha-hydroxy acids include lactic acid and glycolic acid.

[0140] The monovalent non-polymer acid may be a monovalent non-polymer organic acid, preferably a monovalent non-polymer carboxylic acid, and more preferably a monovalent hydroxy acid such as lactic acid.

[0141] The quantity of the monovalent non-polymeric acid(s) or their salt(s) in the composition according to the present invention may be 0.001% by weight or more, preferably 0.005% by weight or more, and more preferably 0.01% by weight or more, relative to the total weight of the composition.

[0142] On the other hand, the quantity of the monovalent non-polymeric acid(s) or their salt(s) in the composition according to the present invention may be 1% by weight or less, preferably 0.5% by weight or less, and more preferably 0.1% by weight or less, relative to the total weight of the composition.

[0143] The quantity of the monovalent non-polymeric acid(s) or their salt(s) in the composition according to the present invention can be from 0.001% to 1% by weight, preferably from 0.005% to 0.5% by weight, and more preferably from 0.01% to 0.1% by weight, relative to the total weight of the composition. (Inorganic salt)

[0144] The composition according to the present invention may comprise (f) at least one inorganic salt. Only one type of inorganic particle may be used, but two or more different types of inorganic salts may be used in combination.

[0145] It is preferable that the (f) inorganic salt be soluble in water. The expression "soluble in water" here means that 10 g or more, preferably 20 g or more, and more preferably 30 g or more of the (f) inorganic salt (anhydrous form) can be dissolved in 100 mL of water at 20 °C.

[0146] The (f) inorganic salt can be chosen from alkali metal salts.

[0147] Alkali metal is a metallic element in group IA of the Periodic Table of elements. It is preferable that the alkali metal be lithium or sodium, and in particular sodium.

[0148] Alkali metal salts may comprise at least one alkali metal cation and at least one anion. The alkali metal cation is a monovalent alkali metal cation, such as the sodium cation (Na+). The anion forming the alkali metal salts is not limited. Examples of anions include inorganic anions such as halogen anions, sulfate anions, sulfite anions, phosphate anions, nitrite anions, nitrate anions, and carbonate anions. Preferably, the anion should be chosen from among the halogen anions, in particular the chloride anion, sulfates, and carbonates. Thus, the inorganic salt (f) may preferably be chosen from the group consisting of halides, sulfates, and carbonates.

[0149] It is preferable that the (f) inorganic salt be a normal salt. In other words, it is preferable that the (f) inorganic salt not contain H+ or OH-. Thus, it is preferable that the (f) inorganic salt not be a hydroxide.

[0150] The (f) inorganic salt may be selected from inorganic sodium salts. Examples of inorganic sodium salts include inorganic sodium halides such as sodium chloride, sodium sulfate, sodium phosphate, sodium nitrate, and sodium carbonate.

[0151] It is preferable that the (f) inorganic salt be an inorganic sodium halide, and more preferably sodium chloride.

[0152] The quantity of the (f) inorganic salt(s) in the composition according to the present invention may be 0.001% by weight or more, preferably 0.005% by weight or more, and more preferably 0.01% by weight or more, relative to the total weight of the composition.

[0153] Furthermore, the quantity of the (f) inorganic salt(s) in the composition according to the present invention may be 15% by weight or less, preferably 10% by weight or less, and more preferably 5% by weight or less, relative to the total weight of the composition.

[0154] Thus, the quantity of the inorganic salt(s) in the composition according to the present invention can be from 0.001% to 15% by weight, preferably from 0.005% to 10% by weight and preferably more, from 0.01% to 5% by weight, relative to the total weight of the composition.

[0155] (Non-polymer acid having two or more acid dissociation constants)

[0156] The composition according to the present invention comprises (g) at least one non-polymer acid having two or more pKa values ​​or one of its salts, i.e., at least one non-polymer acid having two or more acid dissociation constants or one of its salts. The pKa value (acid dissociation constant) is well known to those skilled in the art and should be determined at a constant temperature such as 25 °C.

[0157] The (g) non-polymeric acid having two or more pKa values ​​or one of its salts can act as a crosslinker for the (a) cationic polymer.

[0158] The term "non-polymer" here means that the acid is not obtained by polymerization of two or more monomers. Therefore, a non-polymer acid does not correspond to an acid obtained by polymerization of two or more monomers, such as a polycarboxylic acid.

[0159] Preferably the molecular weight of the (g) non-polymeric acid having two or more of two pKa values ​​or of one of its salts is 1000 or less, preferably 800 or less, and more preferably 700 or less.

[0160] There is no limit to the type of non-polymer acid (g) having two or more pKa values ​​or of one of its salts. Two or more different types of non-polymer acids (g) having two or more pKa values ​​or of their salts may be used in combination. Thus, a single type of non-polymer acid having two or more pKa values ​​or one of its salts, or a combination of different types of non-polymer acids having two or more pKa values ​​or of their salts, may be used.

[0161] The term "salt" herein means a salt formed by the addition of suitable base(s) to a non-polymer acid having two or more pKa values, which can be obtained from a reaction with the non-polymer acid having two or more pKa values ​​with the base(s) according to processes known to those skilled in the art. Examples of salts include metal salts, for example alkali metal salts such as Na and K, alkaline earth metal salts such as Mg and Ca, and ammonium salts.

[0162] The non-polymer acid having two or more pKa values ​​or one of its salts may be an organic acid or one of its salts, and preferably a hydrophilic or water-soluble organic acid or one of its salts.

[0163] The non-polymeric acid having two or more pKa values ​​may have at least two acid groups selected from the group consisting of a carboxylic group, a sulfuric group, a sulfonic group, a phosphoric group, a phosphonic group, a phenolic hydroxyl group, and a mixture thereof.

[0164] The non-polymeric acid having two or more pKa values ​​may be a non-polymeric polyvalent acid such as phosphoric acid.

[0165] The non-polymer acid having two or more pKa values ​​may be chosen from the group consisting of dicarboxylic acids, disulfonic acids and diphosphoric acids, and one of their mixtures.

[0166] The (g) non-polymer acid having two or more of two pKa values ​​or one of its salts may be selected from the group consisting of oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, fumaric acid, maleic acid, malic acid, citric acid, aconitic acid, oxaloacetic acid, tartaric acid and their salts; aspartic acid, glutamic acid and their salts; terephthalylidene diamphrulfonic acid or its salts (Mexoryl SX), Benzophenone-9; phytic acid and its salts;Red 2 (Amaranth), Red 102 (New Coccine), Yellow 5 (Tartrazine), Yellow 6 (Sunset Yellow FCF), Green 3 (Fast Green FCF), Blue 1 (Brillant Blue FCF), Blue 2 (Indigo Carminé), Red 201 (Lithol Rubine B), Red 202 (Lithol Rubine BCA), Red 204 (Lake Red CBA), Red 206 (Lithol Red CA), Red 207 (Lithol Red BA), Red 208 (Lithol Red SR), Red 219 (Brilliant Lake Red R), Red 220 (Deep Maroon), Red 227 (Fast Acid Magenta), Yellow 203 (Quinoline Yellow WS), Green 201 (Alizanine Cyanine Green F), Green 204 (Pyranine Conc), Green 205 (Light Green SF Yellowish), Blue 203 (Patent Blue CA), Blue 205 (Alfazurine FG), Red 401 (Violamine R), Red 405 (Permanent Re F5R), Red 502 (Ponceau 3R), Red 503 (Ponceau R), Red 504 (Ponceau SX), Green 401 (Naphthol Green B), Green 402 (Guinea Green B), et Black 401 (Naphthol Blue Black); acide folique, acide ascorbique, acide érythorbique et leurs sels ; cystine et ses sels ; EDTA et ses sels ; glycyrrhizine et ses sels ; et un de leurs mélanges. ;

[0167] It may be preferable that the (g) non-polymeric acid having two or more of two pKa values ​​or one of its salts be chosen from the group consisting of terephthalylidene diamphr sulfonic acid and its salts (Mexoryl SX), Yellow 6 (Sunset Yellow FCF), ascorbic acid, phytic acid and its salts, and one of their mixtures.

[0168] The (g) non-polymeric acid having two or more of two pKa values ​​or one of its salts may be an organic acid or one of its salts, preferably a hydrophilic or water-soluble organic acid or one of its salts, and more preferably phytic acid or one of its salts.

[0169] The quantity of the (g) non-polymer acid(s) having two or more pKa values ​​or their salt(s) in the composition according to the present invention may be 0.0001% by weight or more, preferably 0.0005% by weight or more and, more preferably, 0.001% by weight or more, relative to the total weight of the composition.

[0170] Furthermore, the quantity of the (g) non-polymer acid(s) having two or more pKa values ​​or their salt(s) in the composition according to the present invention may be 10% by weight or less, preferably 5% by weight or less, and more preferably 1% by weight or less, relative to the total weight of the composition.

[0171] Thus, the quantity of the (g) non-polymer acid(s) having two or more pKa values ​​or their salt(s) in the composition according to the present invention can be from 0.0001% to 10% by weight, preferably from 0.0005% to 5% by weight and, more preferably, from 0.001% to 1% by weight, relative to the total weight of the composition. (Water)

[0172] The composition according to the present invention may include (h) water.

[0173] The (h) water can constitute an aqueous phase, which can be a continuous phase, in the composition according to the present invention.

[0174] The quantity of (h) water in the composition according to the present invention may be 50% by weight or more, preferably 55% by weight or more, and more preferably 60% by weight or more, relative to the total weight of the composition.

[0175] Furthermore, the quantity of (h) water may be 95% by weight or less, preferably 80% by weight or less and more preferably 85% by weight or less, relative to the total weight of the composition.

[0176] Thus, the quantity of (h) water can be from 50% to 95% by weight, preferably from 55% to 90% by weight, and more preferably from 60% to 85% by weight, relative to the total weight of the composition. (pH)

[0177] The pH of the composition according to the present invention can be from 3 to 7, preferably from 4 to 7, and more preferably from 5 to 7.

[0178] At a pH of 3 to 7, the (a) cationic polymer can be very stable.

[0179] The pH of the composition according to the present invention can be corrected by adding at least one alkali and / or at least one acid, other than (e) monovalent nonpolymer acid or one of its salts and (g) nonpolymer acid having two or more pKa values ​​or one of its salts. The pH of the composition according to the present invention can also be corrected by adding at least one buffering agent. (Alkali)

[0180] The composition according to the present invention may comprise at least one alkali agent. Two or more alkali agents may be used in combination. Thus, a single type of alkali agent or a combination of different types of alkali agents may be used.

[0181] The alkali agent may be an inorganic alkali agent. Preferably, the inorganic alkali agent should be chosen from the group consisting of ammonia, alkali metal hydroxides, alkaline earth metal hydroxides, alkali metal phosphates, and monohydrogen phosphates such as sodium phosphate or sodium monohydrogen phosphate.

[0182] Examples of inorganic alkali metal hydroxides include sodium hydroxide and potassium hydroxide. Examples of alkaline earth metal hydroxides include calcium hydroxide and magnesium hydroxide. Sodium hydroxide is preferable as an inorganic alkali metal.

[0183] The alkali agent may be an organic alkali agent. Preferably, the organic alkali agent should be chosen from the group consisting of monoamines and their derivatives; diamines and their derivatives; polyamines and their derivatives; basic amino acids and their derivatives; oligomers of basic amino acids and their derivatives; polymers of basic amino acids and their derivatives; urea and its derivatives; and guanidine and its derivatives.

[0184] Examples of organic alkali-aggregates include alkanolamines such as mono-, di- and tri-ethanolamine, and isopropanolamine; urea, guanidine and their derivatives; basic amino acids such as lysine, ornithine or arginine; and diamines such as those described in the structure below:

[0185] in which R denotes an alkylene such as propylene optionally substituted by a hydroxyl or a Ci-C4 alkyl radical, and Rb R2, R3 and R4 independently denote a hydrogen atom, an alkyl radical or a Ci-C4 hydroxyalkyl radical, an example of which may be 1,3-propanediamine and its derivatives.

[0186] The alkali agent(s) may be used in an amount from 0.01% to 15% by weight, preferably from 0.02% to 10% by weight and more preferably from 0.03% to 5% by weight, relative to the total weight of the composition, depending on their solubility. (Acid)

[0187] The composition according to the present invention may comprise at least one acid. Two or more acids may be used in combination. Thus, a single type of acid or a combination of different types of acids may be used.

[0188] As an acid, any inorganic or organic acid may be cited, preferably inorganic acids, which are commonly used in cosmetic products. A monovalent acid and / or a polyvalent acid may be used. Hydrochloric acid (HCl) may be preferable.

[0189] The acid or acids may be used in a total quantity of 0.01% to 15% by weight, preferably 0.02% to 10% by weight, more preferably 0.03% to 5% by weight, relative to the total weight of the composition, depending on their solubility. (Optional ingredient)

[0190] The composition according to the present invention may include, in addition to the aforementioned ingredients, one or more optional ingredients typically used in cosmetics, specifically preservatives such as phenoxyethanol; organic or inorganic UV filters; surfactants / emulsifiers, hydrophilic or lipophilic thickeners, derived, for example, from synthetic polymers other than (a) the cationic polymer; volatile or non-volatile organic solvents, such as ethanol; anionic or amphoteric polymers; non-ionic polymers such as beta-glucan; silicones and silicone derivatives; natural extracts derived from animals or plants other than (a) the cationic polymer; oils; waxes; and the like, within a range that does not alter the effects of the present invention.

[0191] The composition according to the present invention may comprise the above optional additive(s) in an amount of 0.01% to 30% by weight, preferably 0.05% to 20% by weight and more preferably 0.1% to 10% by weight, relative to the total weight of the composition.

[0192] The composition according to the present invention may include a very limited amount of silicone(s) in order to be environmentally friendly.

[0193] The amount of silicone(s) in the composition according to the present invention may be 1% by weight or less, preferably 0.1% by weight or less, and more preferably 0.01% by weight or less, relative to the total weight of the composition. In particular, it is preferable that the composition according to the present invention not include silicone. [Preparation]

[0194] The composition according to the present invention can be prepared by mixing the essential ingredient(s) as explained above, and the optional ingredient(s), if applicable, as explained above.

[0195] The method and means for mixing the above essential and optional ingredients are not limited. Any conventional method and means can be used to mix the above essential and optional ingredients to prepare the composition according to the present invention.

[0196] The composition according to the present invention can be prepared by simple or easy mixing with a conventional mixing means such as a stirrer and homogenizer. Furthermore, heating may not be required. Therefore, the process of The preparation of the composition according to the present invention can be environmentally friendly. [Cosmetic application]

[0197] The composition according to the present invention can be intended for use as a cosmetic composition. Thus, the cosmetic composition according to the present invention can be intended for application to keratinous material. Keratinous material here means material containing keratin as its principal constituent, and examples thereof include skin, scalp, nails, lips, hair, and the like. Thus, it is preferable that the cosmetic composition according to the present invention be used for a cosmetic process on keratinous material, preferably hair and skin, more preferably skin, and even more preferably scalp.

[0198] In one embodiment, the cosmetic composition according to the present invention may be a cosmetic composition for the skin, preferably a skin care composition, and more preferably a scalp care composition.

[0199] In another embodiment, the cosmetic composition according to the present invention may be a cleansing composition, preferably a cleansing composition for keratinous fibers such as hair, and more preferably a shampoo composition.

[0200] The composition according to the present invention may be of the no-rinse or rinse-off type. The no-rinse type composition is not removed by rinsing after being used on a keratinous material. The rinse-off type composition is removed by rinsing after being used on a keratinous material. Preferably, the composition according to the present invention is a rinse-off type composition. [Shape]

[0201] The form of the composition according to the present invention is not limited.

[0202] The composition according to the present invention can be in the form of a fluid, preferably a liquid or a paste, and more preferably a liquid, at ambient temperature such as 25 °C under atmospheric pressure (760 mmHg or 105Pa).

[0203] For example, the composition according to the present invention may be in the form of a solution, a dispersion, or a suspension.

[0204] The compositions according to the present invention may be transparent or translucent.

[0205] Transparency can be measured by measuring turbidity (turbidity can, for example, be measured with a 2100Q incandescent lamp (marketed by Hach Company) equipped with a round cell (25 mm in diameter and 60 mm high) and a A tungsten filament lamp capable of emitting visible light (between 400 and 800 nm, preferably 400 to 500 nm) is used. The measurement can be performed on the undiluted composition. The blank test can be evaluated with distilled water.

[0206] The composition according to the present invention may preferably have a turbidity of less than 200 NTU, preferably less than 150 NTU, more preferably less than 100 NTU, and even more preferably less than 50 NTU. [Process and use]

[0207] The present invention also relates to:

[0208] a cosmetic process for a keratinous material such as the scalp, comprising: the application to the keratinous material of the composition according to the present invention; and optionally the rinsing of the composition from the keratinous material.

[0209] The cosmetic process here refers to a non-therapeutic cosmetic process for the care of the surface of a keratinous material such as the scalp.

[0210] The present invention may also relate to a process for forming coacervates by dilution with water of a composition comprising: a. at least one cationic polymer; b. at least one anionic surfactant; and c. of propionic acid or one of its salts,

[0211] in which

[0212] the (a) cationic polymer is selected from chitosans with a molecular weight greater than 3,000, preferably greater than 5,000, and more preferably greater than 10,000.

[0213] The present invention may also relate to the use of: a. at least one cationic polymer; and b. at least one anionic surfactant,

[0214] in a composition comprising: a. of propionic acid or one of its salts,

[0215] in which

[0216] the (a) cationic polymer is selected from chitosans having a molecular weight less than 3,000, preferably less than 5,000, and more preferably less than 10,000,

[0217] in order to form coacervates when the composition is diluted with water.

[0218] The coacervates may include (c)propionic acid or one of its salts.

[0219] The composition in the above process and use according to the present invention may also include (d) at least one amphoteric surfactant and / or (e) at least one monovalent non-polymeric acid or one of its salts and / or (f) at least one salt inorganic and / or (g) at least one non-polymeric acid having two or more pKa values ​​and / or (h) water.

[0220] The above explanations concerning (a) cationic polymer, (b) anionic surfactant, (c) propionic acid or one of its salts, (d) at least one amphoteric surfactant, (e) at least one monovalent non-polymeric acid or one of its salts, (f) at least one inorganic salt, (g) at least one non-polymeric acid having two or more pKa values, and (h) water for the composition according to the present invention can be applied to those of the composition in the above process and use according to the present invention. EXAMPLES

[0221] The present invention will be described in more detail by means of examples. However, these should not be interpreted as limiting the scope of the present invention. Examples#l-3 and Comparative Examples#l-6 [Preparations]

[0222] Each of the compositions according to Examples 1-3 and Comparative Examples 1-6 was prepared by mixing the ingredients listed in Table 1. The numerical values ​​of the quantities of ingredients indicated in Table 1 are all based on "% by weight" of raw materials.

[0223] [Table 1]

[0224] [Tables 1] Ex. 1 Ex. 2 Ex. 3 Ex. comp . 1 Ex. comp. 2 Ex. comp. 3 Ex. comp. 4 Ex. comp. 5 Ex. comp. 6 Water q.s. 1 ... 0.7 0.7 0.7 0.7 0.7 0.7 0.7 Chitosan (WH: 20-30 kDa) 0.05 0.05 0.05 - 0.05 - - - - Lactic acid (91 wt% aqueous solution) 0.02 3 0.02 3 0.02 3 - 0.02 3 - - - - Polyquatemium-10 - - - - - 0.05 - - - Polyquatemium-7 (9 wt% aqueous solution) - - - - - - 0.56 - - Polylysine (25 wt% aqueous solution) - - - - - - - 0.2 - Chitosan (3 kDa) - - - - - - - - 0.05 Sodium chloride - 1.5 - - - - - - - Phytic acid (50 wt% aqueous solution) - - 0.00 5 - - - - - - Hydroxide Sodium hydroxide (49% aqueous solution by weight) qsp H6.3 ±0.3 qsp H6.3 ±0.3 qsp H6.3 ±0.3 qsp H6.3 ±0.3 qsp H6.3 ±0.3 qsp H6.3 ±0.3 qsp H6.3 ±0.3 qsp H6.3 ±0.3 qsp H6.3 ±0.3 pH 6.11 6.46 6.47 6.12 6.40 6.12 6.33 6.20 6.12 Corn formation vat Yes Yes Yes No No No No No No [Reviews] (Coacervate formation)

[0225] Each (5 g) of the compositions according to Examples 1-3 and Comparative Examples 1-6 was mixed with water (45 g) to dilute it. The resulting mixture was shaken vigorously and then left to stand at room temperature (25 °C) for more than one day. Coacervate formation was determined visually by whether or not the mixture had a turbid appearance according to the following criteria.

[0226] Yes: A turbid aspect has appeared

[0227] No: A turbid aspect was not manifested

[0228] The results are shown in Table 1. (Summary)

[0229] Coacervate formation was observed only for the compositions according to Examples 1-3, which included chitosan with a relatively higher molecular weight. The presence of sodium chloride (Example 2) or phytic acid (Example 3) did not affect coacervate formation.

[0230] In contrast, coacervate formation was not observed for the compositions according to Comparative Examples 1-6, which did not include chitosan (Comparative Example 1), surfactant (Comparative Example 2), polyquaternium-10 (Comparative Example 3), polyquaternium-7 (Comparative Example 4), polylysine (Comparative Example 5), chitosan of relatively lower molecular weight (Comparative Example 6), respectively.

Claims

Demands

1. Composition, preferably a cosmetic composition, more preferably a cosmetic composition for a keratinous material such as the scalp, and even more preferably a shampoo composition, comprising (a) at least one cationic polymer; (b) at least one anionic surfactant; and (c) propionic acid or one of its salts, wherein the (a) cationic polymer is selected from chitosans of a molecular weight greater than 3,000, preferably greater than 5,000, and more preferably greater than 10,000.

2. Composition according to claim 1, wherein the molecular weight of (a) cationic polymer is less than 2,000,000, preferably less than 1,500,000, and more preferably less than 1,000,000.

3. Composition according to claim 1 or 2, wherein the amount of the (a) cationic polymer(s) in the composition is from 0.001% to 15% by weight, preferably from 0.005% to 10% by weight and, more preferably, from 0.01% to 5% by weight, relative to the total weight of the composition.

4. Composition according to any one of claims 1 to 3, wherein the (b) anionic surfactant is selected from alkyl sulfates, alkyl ether sulfates, and mixtures thereof.

5. Composition according to any one of claims 1 to 4, wherein the (b) anionic surfactant is selected from (C6-C30)alkyl ether sulfates such as sodium laureth sulfate.

6. Composition according to any one of claims 1 to 5, wherein the composition further comprises (d) at least one amphoteric surfactant.

7. Composition according to any one of claims 1 to 6, wherein the composition further comprises (e) at least one monovalent non-polymeric acid or one of its salts.

8. Composition according to any one of claims 1 to 7, wherein the composition further comprises (f) at least one inorganic salt.

9. Composition according to any one of claims 1 to 8, wherein the composition further comprises (g) at least one non-polymeric acid having two or more pKa values ​​or one of its salts.

10. Cosmetic process for a keratinous material such as the scalp, comprising: applying to the keratinous material the composition according to any one of claims 1 to 9; and rinsing the composition from the keratinous material.