SKINCARE PRODUCTS

Abstract

SKINCARE COMPOSITIONS The present invention relates to a treatment composition for keratinous material, particularly skin, comprising: (a) at least one polysaccharide; (b) at least one amphoteric surfactant; (c) at least one co-surfactant. Furthermore, the present invention relates to the use thereof, particularly as an emulsion to provide a transforming sensation to the skin. Figure for the abstract: none

Description

Title of the invention: SKIN CARE COMPOSITIONS FIELD OF INVENTION

[0001] The present invention relates to a composition for treating keratinous material, particularly skin, specifically for providing the skin with a sensation of transformation with good stability. Furthermore, the present invention relates to the use thereof. CONTEXT

[0002] The skin acts as a natural barrier between internal and external environments and therefore plays an important role in vital biological functions such as protection against mechanical and chemical damage, microorganisms, and ultraviolet radiation. However, the health and appearance of the skin can deteriorate due to environmental factors, genetic makeup, nutrition, and sun exposure.

[0003] The sensation of transformation together with stability are sought as one of the most desirable properties in the cosmetics / personal care industry.

[0004] Furthermore, the formulation of environmentally friendly cosmetic products, which are designed and developed taking environmental issues into account, is becoming a major objective in an effort to meet global challenges.

[0005] It is therefore essential to propose more sustainable compositions to address 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 and, more particularly, materials of plant origin while reducing the use of compounds of petrochemical origin.

[0007] As such, consumers want new and improved compositions that are more durable and can provide personal care / makeup products with an improved transformative feel and good stability. DISCLOSURE SUMMARY

[0008] The inventors have discovered that a composition, preferably for the treatment of keratinous materials, in particular skin, comprising: (a) at least one first polysaccharide; (b) at least one amphoteric surfactant; (c) at least one co-surfactant, chosen from a linear fatty alcohol having 14 to 30 carbon atoms; wherein the monomer of the first polysaccharide bears both a main chain and a side chain and has at least one ionic group or at least one ionizable group in the main chain, which have good stability and are suitable for providing a superior transformation sensation.

[0009] The present invention also relates to the use of the composition according to the present invention for the treatment of keratinous materials, particularly skin. This use can be manifested as a process for treating keratinous materials, particularly skin, comprising the steps of application to said keratinous materials.

[0010] The present invention also relates to the use of the composition according to the present invention to prepare a cosmetic product for the treatment of keratinous materials, in particular of the skin.

[0011] Preferably, the composition according to the present invention is in the form of a liquid emulsion, for example, water-in-oil (W / O) emulsion, oil-in-water (O / W) emulsion, oil-in-water-in-oil (O / W / O) emulsion, water-in-oil-in-water (O / W / O) emulsion, comprising an aqueous phase and an oily phase, further optionally comprising an acceptable or similar active agent.

[0012] Other features and advantages of the present invention will become more apparent from the description and examples that follow. DETAILED DESCRIPTION OF THE DISCLOSURE

[0013] As used here, the term "ionizable group" means any group which, either by its intrinsic chemical nature or depending on the environment and / or the pH of the environment in which it is present, can be in ionic form.

[0014] By "sensation of transformation" is meant the following phenomenon: the product (for example, in the form of a gel or an emulsion), which may even be thick, is transformed into a fluid or even into water upon application to the skin, as if it were on the skin. During this transformation, an aqueous film is visible (visible water droplets). First polysaccharides

[0015] The composition according to the invention comprises at least a first polysaccharide.

[0016] The first polysaccharide is a polysaccharide, in which its monomer has both a main chain and a side chain and has at least one ionic group or at least one ionizable group in the main chain, in which the first polysaccharide has the following formula (I):

[0017] (I)

[0018] in which • R represents a radical chosen from rhamnose, mannose, galactose, arabinose, xylose, fucose, or • M belongs to an ionic group or to an ionizable group, preferably represents a counterion derived from an alkali metal or an alkaline earth metal, or a counterion derived from an inorganic ammonium or an organic amine; preferably, M represents a counterion selected from a sodium, potassium, calcium, magnesium, ammonium ion or a counterion derived from an organic amine. • n represents at least 200, preferably at least 1000, in particular at least 3000, or less than 20,000, in particular less than 10,000, or from 500 to 10,000, in particular from 1000 to 7000.

[0019] Preferably, the first polysaccharide is chosen from the following polysaccharides: diutan gum, welane gum, and mixtures thereof; preferably, diutan gum.

[0020] Preferably, the first polysaccharide is present in an amount ranging from about 0.01% by weight to about 5% by weight, preferably from about 0.05% by weight to about 3% by weight, or from about 0.08% by weight to about 1% by weight, relative to the total weight of the composition. Amphoteric surfactants

[0021] The composition according to the invention comprises at least one amphoteric surfactant.

[0022] For the purposes of the present invention, the term "amphoteric surfactants" is intended to encompass surfactants conventionally referred to as both "amphoteric surfactant" and "zwitterionic surfactant".

[0023] Preferably, the amphoteric surfactants are selected from (C8-C20) alkyl betaines, (C8-C20) alkylamido (C1-C6) alkyl betaines, such as cocamidopropyl betaine, sulfobetaines (also called sultaines) such as (C8-C20) al-kylsulfobetaines, (C8-C20) alkylamido (C1-C6) alkylsulfobetaines, amino acids such as glycine, (C8-C20) alkyl polyaminocarboxylates, (C8-C20) al-kylamphoacetates, (C8-C20) alkylamphodiacetates, phospholipids such as lecithins, hydrogenated lecithins, salts thereof, and mixtures of these.

[0024] Preferably, amphoteric surfactants are chosen from phospholipids such as lecithins, hydrogenated lecithins, salts thereof, derivatives thereof and mixtures thereof.

[0025] As (C8-C20) alkylbetaines, one can in particular mention cocobetaine as the product marketed under the name DEHYTON by Cognis, laurylbetaine as the product marketed under the name GENAGEN by Clariant, oxyethylene laurylbetaine (10 EO), as the product marketed under the name LAURYLETHER (10 EO) by Shin Nihon Rica, oxyethylene stearylbetaine (10 EO) as the product marketed under the name STEARYLETHER (10 EO) by Shin Nihon Rica.

[0026] Among the (C8-C20) alkylamido (C1-C6) alkylbetaines, we can mention for example cocamidopropyl betaine such as the products marketed under the name LEBON 2000 by Sanyo, under the name EMPIGEN by Albright & Wilson, under the names Tego Betain F 50 and CK D by EVONIK GOLDSCHMIDT, or those marketed as a mixture with glyceryl laurate such as the trade references Tego Betain HS or Antil HS60 from EVONIK GOLDSCHMIDT, lauramidopropyl betaine such as the product marketed under the name REWOTERIC by Witco.

[0027] As examples of sultaines, we can mention (C8-C20) alkylsulfobetaines; (C8-C20) alkylamido (C1-C6) alkyl sulfobetaines, (C8-C20) alkylamido (C1-C6) alkyl hydroxyl sulfobetaines such as cocoyl-amidopropylhydroxy-sulfobetaine such as that marketed under the name CROSULTAIN by Croda.

[0028] As examples of (C8-C20) alkyl polyaminocarboxylates (APACs), mention may be made of sodium cocoylpolyaminocarboxylate, such as that marketed under the name AMPHOLAK 7 and AMPHOLAK 7 by AkzoNobel, sodium stearyl-polyamidocarboxylate such as that marketed under the name AMPHOLAK 7 TX / C by AkzoNobel, sodium carboxymethyloleyl-polypropylamine, such as that marketed under the name AMPHOLAK by AkzoNobel.

[0029] As an example of a C8-C20 alkyldiamphocate, N-disodium N-cocoyl-N-carboxymethoxyethyl-N-carboxymethyl ethylediamine (CTFA name: disodium cocamphodiacetate) can be mentioned as the product marketed under the MIRANOL C2M CONCENTRATE by Rhodia Chimie, and N-cocoyl-N-hydroxyethyl-N-carboxymethyl-ethylediamine of N-sodium (CTFA name: sodium cocamphoacetate) as that sold by Evonik Goldschmidt under the name Rewoteric AM C.

[0030] Examples of C8-C20 alkylamphodiacetates include disodium cocoamphodiacetate, disodium lauroamphodiacetate, disodium caproamphodiacetate, disodium capryloamphodiacetate, disodium cocoamphodipropionate, disodium lauroamphodipropionate, disodium caproamphodipropionate, disodium capryloamphodipropionate, lauroamphodipropionic acid, and cocoamphodipropionic acid. Examples include cocoamphodiacetate sold by Rhodia under the trade name C2M Concentrate.

[0031] Among the phospholipids, mention can be made of lecithins such as the product marketed by the NIKKOL group (Lecinol series) or other lecithins marketed by CARGIL / LUCAS MEYER (the EMULMETIKS family of EMULFLUIDS).

[0032] In particular, lecithin and a lecithin derivative may preferably be used. Among others, hydrogenated lecithin may be used to advantage.

[0033] The amphoteric surfactant is preferably present in an amount ranging from about 0.05% by weight to about 10% by weight, preferably from about 0.08% by weight to about 5% by weight, or from about 0.1% by weight to about 2% by weight, relative to the total weight of the composition. Co-surfactant

[0034] The composition according to the present invention comprises at least one co-surfactant selected from linear fatty alcohols having 14 to 30 carbon atoms.

[0035] Among other things, the co-surfactant in the composition according to the present invention has a regular long carbon chain structure, for example, linear C14-C30 fatty alcohol.

[0036] Preferably, the co-surfactant is a linear, saturated, C14-C30 fatty alcohol.

[0037] Preferably, the linear, saturated fatty alcohol in C14-C30 is chosen from linear, saturated fatty alcohols in C14-C28, preferably linear, saturated fatty alcohols in C16-C28, more preferably from linear, saturated fatty alcohols in C18-C26, or even from linear, saturated fatty alcohols in C20-C22 or mixtures thereof.

[0038] More preferably, the co-surfactant is chosen from linear, saturated fatty alcohols, in C14-C28, preferably linear, saturated fatty alcohols, in C16-C28, more preferably from linear, saturated fatty alcohols, in C18-C26, or even from linear, saturated fatty alcohols, in C20-C22 or mixtures thereof.

[0039] The linear, saturated, C14-C28 alcohol or fatty alcohols used in the context of the present invention include, in particular, C14 alcohol or fatty alcohols, for example myristyl alcohol (C14), C16 alcohol or fatty alcohols, for example cetyl alcohol or hexadecanol (C16), C18 alcohol or fatty alcohols, for example stearyl alcohol or octadecanol (Cl8), C20 alcohol or fatty alcohols, for example arachidyl alcohol (C20), or C22 alcohol or fatty alcohols, for example behenyl alcohol (C22), or mixtures thereof.

[0040] Preferably, the co-surfactant according to the invention is chosen from C20 alcohol or fatty alcohols, for example arachidyl alcohol (C20), or C22 alcohol or fatty alcohols, for example behenyl alcohol (C22), or mixtures thereof.

[0041] The co-surfactant is present in an amount ranging from about 0.1% by weight to about 10% by weight, preferably from about 0.5% by weight to about 8% by weight, or from about 1% by weight to about 5% by weight, relative to the total weight of the composition.

[0042] Preferably, the co-surfactant is present in an amount ranging from about 0.1% by weight to about 10% by weight, preferably from about 2% by weight to about 5% by weight, or from about 1% by weight to about 3% by weight, relative to the total weight of the composition.

[0043] Preferably, the weight ratio of the amphoteric surfactant to the co-surfactant ranges from about 1:1 to about 1:10, preferably from about 1:1 to about 1:8, even from about 1:1 to about 1:7, in particular ranges from about 1:1.5 to about 1:6, advantageously from about 1:2 to about 1:6. Second polysaccharide

[0044] The present composition may further comprise a second polysaccharide different from the first polysaccharide.

[0045] Preferably, the second polysaccharide is a natural polysaccharide.

[0046] In general, a natural polysaccharide refers to a polysaccharide that can be obtained naturally. For the purposes of the present invention, however, the term "natural polysaccharide" is intended to also include a "polysaccharide of natural origin," which refers to a polysaccharide obtained by modification of a polysaccharide that can be obtained naturally.

[0047] In general, the second polysaccharide suitable for use in the present invention can be homopolysaccharides such as fructans, glucans, galactans and mannans or heteropolysaccharides such as hemicellulose, and mixtures thereof.

[0048] Similarly, the second polysaccharide can be linear polysaccharides such as pullulan or branched polysaccharides such as gum arabic and amylopectin, or mixed polysaccharides such as starch.

[0049] Preferably, the second polysaccharide is chosen from those produced by microorganisms; polysaccharides isolated from algae, and polysaccharides from higher plants, such as homogeneous polysaccharides, in particular celluloses and derivatives thereof or fructans, heterogeneous polysaccharides such as gum arabic, galactomannans, glucomannans and derivatives thereof; and mixtures thereof.

[0050] Preferably, the second polysaccharide is chosen from homogeneous polysaccharides, in particular celluloses and their derivatives or fructans, heterogeneous polysaccharides such as gum arabic, galactomannans, glucomannans and their derivatives; and mixtures thereof.

[0051] As an example of the second polysaccharide, mention may be made of fructans, gellans, glucans, amylose, amylopectin, glycogen, pullulan, dextran, celluloses and their derivatives, such as methylcelluloses, hydroxyalkylcelluloses, ethylhydroxyethylcelluloses and carboxymethylcelluloses, mannans, xylans, lignins, arabans, galactans, galacturonans, chitin, chitosan, glucuronoxylans, arabinoxylans, xyloglucans, glucomannans, arabinogalactans, glycosaminoglucans, gum arabic, tragacanth gum, ghatti gum, locust bean gum, galactomannans such as guar gum and non-ionic derivatives of these, in particular hydroxypropyl guar, and ionic derivatives thereof, biopolysaccharide gums of microbial origin, in particular sclerotium gum, for example scleroglucan, or xanthan gum,Mucopolysaccharides, and in particular chondroitin sulfates, and mixtures thereof. These second polysaccharides can be chemically modified, notably by urea or urethane groups or by a reaction of hydrolysis, oxidation, esterification, etherification, sulfation, phosphatation, amination, amidation or alkylation, or by several of these modifications.

[0052] The derivatives obtained can be anionic, cationic, amphoteric.

[0053] These second polysaccharides which are suitable for use in the present inventions can be distinguished according to whether they are derived from microorganisms, algae or higher plants, and are detailed below.

[0054] Polysaccharides produced by microorganisms

[0055] Dextran and dextran sulfate

[0056] Dextran is a neutral polysaccharide bearing no charged groups, which is biologically inert, prepared by fermentation of beet sugar containing only hydroxyl groups. It is possible to obtain dextran fractions of different molecular weights from native dextran by hydrolysis and purification. Dextran can in particular be in the form of dextran sulfate.

[0057] Dextran is represented, for example, by the products sold under the name Dextran or Dextran T by Pharmacosmos, or under the name Dextran 40 Powder or Dextran 70 Powder by Meito Sangyo Co. Dextran sulfate is sold by PK Chemical A / S under the name Dextran sulfate.

[0058] Succinoglycan

[0059] Succinoglycan is a high molecular weight extracellular polymer produced by bacterial fermentation, consisting of repeating octasaccharide motifs (repetition of 8 sugars). Succinoglycans are, for example, sold under the name Rheozan by the company Rhodia.

[0060] Polysaccharides isolated from algae

[0061] Furcellarane

[0062] Furcellarane is commercially obtained from the red algae Furcellaria fasztigiata. Furcellarane is produced, for example, by the company Est-Agar.

[0063] Polysaccharides of plant origin

[0064] This category of polysaccharides can be divided into homogeneous polysaccharides (a single species of saccharide) and heterogeneous polysaccharides composed of several types of saccharides. a. Homogeneous polysaccharides and their derivatives

[0065] The polysaccharide according to the present invention can be chosen from celluloses and their derivatives or fructans.

[0066] Cellulose and derivatives

[0067] The polysaccharide according to the present invention may also be cellulose or a derivative thereof, in particular cellulose ethers or esters (for example, methylcellulose, carboxymethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxymethylpropylcellulose, cellulose acetate, cellulose nitrate, nitrocellulose).

[0068] The present invention may also contain an associative polymer based on cellulose.

[0069] According to the present invention, the term "cellulose-based associative polymer" refers to any polysaccharide compound bearing in its structure linear sequences of anhydroglucopyranose (AGU) residues linked together by [3(1,4)] bonds. The repeating unit is the cellobiose dimer. The AGUs are in chair conformation and bear three hydroxyl groups: two secondary alcohols (at positions 2 and 3) and one primary alcohol (at position 6). The polymers thus formed combine through intermolecular hydrogen bonds, thereby giving the cellulose a fibrous structure (approximately 1500 molecules per fiber).

[0070] The degree of polymerization varies considerably depending on the origin of the cellulose; its value can range from a few hundred to several tens of thousands.

[0071] Cellulose hydroxyl groups can react partially or completely with various chemical reagents to give cellulose derivatives having intrinsic properties. Cellulose derivatives can be anionic, cationic, amphoteric, or nonionic. Among these derivatives, cellulose ethers, cellulose esters, and cellulose ester ethers are distinguished.

[0072] Among the nonionic cellulose ethers, mention may be made of alkylcelluloses such as methylcelluloses and ethylcelluloses; hydroxyalkylcelluloses, such as hydroxymethylcelluloses, hydroxyethylcelluloses and hydroxypropylcelluloses; and mixed hydroxyalkylcelluloses such as hydroxypropylmethylcelluloses, hydroxy-ethylmethylcelluloses, hydroxy ethylethylcelluloses and hydroxybutyl-methylcelluloses.

[0073] Among anionic cellulose ethers, carboxyalkyl celluloses and their salts may be mentioned. By way of example, carboxymethylcelluloses, carboxymethylcelluloses, and carboxymethylhydroxyethyl celluloses and their sodium salts may be mentioned.

[0074] Among cationic cellulose ethers, mention can be made of quaternized, crosslinked or non-crosslinked hydroxyethylcelluloses.

[0075] The quaternizing agent may in particular be glycidyltrimethylammonium chloride or a fatty amine such as laurylamine or stearylamine. Another cationic cellulose ether that may be mentioned is rhydroxyethylcellulosehydroxypropyltrimethylammonium.

[0076] Quatmized cellulose derivatives include, in particular: • Quaternized celluloses modified by groups comprising at least one fatty chain, such as alkyl, arylalkyl or alkylaryl groups comprising at least 8 carbon atoms, or mixtures thereof, • Quaternized hydroxyethylcelluloses modified by groups comprising at least one fatty chain, such as alkyl, arylalkyl or alkylaryl groups comprising at least 8 carbon atoms or mixtures thereof.

[0077] The alkyl radicals supported by the quaternized celluloses or the hydroxyethylcelluloses above preferably contain from 8 to 30 carbon atoms. The aryl radicals preferably designate the phenyl, benzyl, naphthyl or anthryl groups.

[0078] Examples of quaternized alkylhydroxyethylcelluloses containing C8-30 fatty acid chains include the products Quatrisoft LM 200, Quatrisoft LM-X 529-18-A, Quatrisoft LM-X 529-18B (C12 alkyl) and Quatrisoft LM-X 529-8 (Cl8 alkyl) sold by Amerchol and the products Crodacel QM, Crodacel QL (C12 alkyl) and Crodacel QS (C18 alkyl) sold by the company Croda.

[0079] Among cellulose derivatives, we can also mention: • celluloses modified by groups comprising at least one fatty chain, for example hydroxyethylcelluloses modified by groups comprising at least one fatty chain, such as alkyl groups, in particular C8-22 arylalkyl and alkylaryl groups, such as Natrosol Plus Grade 330 CS (Cl6 alkyls) sold by Aqualon, and • celluloses modified by alkylphenyl ether groups of polyalkylene glycol, such as the product Amercell Polymer HM-1500 (nonylphenyl polyethylene glycol ether (15)) sold by the company Amerchol.

[0080] Cellulose esters include mineral cellulose esters (cellulose nitrates, sulfates, phosphates, etc.), organic cellulose esters (cellulose monoacetates, triacetates, amidopropionates, acetobutyrates, acetopropionates and acetotrimellitates, etc.), and mixed organic / mineral cellulose esters, such as cellulose acetobutyrate sulfates and cellulose acetopropionate sulfates. Examples of cellulose ester ethers include hydroxypropylmethylcellulose phthalates and ethylcellulose sulfates.

[0081] The cellulose-based associative polymer of the present invention can be selected from unsubstituted and substituted celluloses. Cellulose and derivatives are represented, for example, by the products sold under the name Cekol (carboxymethylcellulose) by Noviant (CP-Kelco), under the name Akucell AF (sodium carboxymethylcellulose) by Akzo Nobel, under the names Me-thocelTM (cellulose ethers) and EthocelTM (ethylcellulose) by Dow, and under the names (carboxymethylcellulose and sodium carboxymethylcellulose), (methylcellulose), BlanoseTM (carboxymethylcellulose), (methylcellulose, hydroxypropylmethylcellulose), (hydroxypropylcellulose), (cetylhydroxyethylcellulose) and CS (hydroxyethylcellulose) by Hercules Aqualon.

[0082] Fructosans

[0083] The polysaccharide according to the present invention may in particular be a fructosan selected from rinulin and its derivatives (in particular dicarboxy and carboxymethyl inulins).

[0084] Fructans or fructosans are oligosaccharides or polysaccharides comprising a sequence of anhydrofructose motifs optionally combined with several residues of saccharides other than fructose. Fructans may be linear or branched. Fructans may be products obtained directly from a plant or microbial source or, alternatively, products whose chain length has been modified (increased or decreased) by fractionation, synthesis, or hydrolysis, particularly enzymatic hydrolysis. Fructans generally have a degree of polymerization from 2 to about 1000 and preferably from 2 to about 60.

[0085] Three groups of fructans are distinguished. The first group corresponds to products whose fructose motifs are largely linked by [3 (2, 1) bonds. These are essentially linear fructans such as inulins.

[0086] The second group also corresponds to linear fructoses, but the fructose motifs are essentially linked by [3 (2, 6) bonds. These products are levans.

[0087] The third group corresponds to mixed fructans, that is to say, containing [3(2,6) and [3(2,1)] sequences. These are essentially branched fructans, such as graminans.

[0088] The preferred fructans in the compositions according to the present invention are inulins. Inulin can be obtained, for example, from chicory, dahlia or Jerusalem artichoke, preferably from chicory.

[0089] In particular, the polysaccharide, especially inulin, has a degree of polymerization of 2 to about 1000 and preferably of 2 to about 60, and a degree of substitution of less than 2 on the basis of a fructose motif.

[0090] The inulin used for the present invention is represented, for example, by the products sold under the name BeneoTM inulin by the company Orafti, and under the name by the company Sensus.

[0091] b) Heterogeneous polysaccharides and their derivatives

[0092] The polysaccharides that can be used according to the present invention can be gums, for example cassia gum, karaya gum, konjac gum, tragacanth gum, tara gum, acacia gum or gum arabic.

[0093] Gum arabic

[0094] Gum arabic is a highly branched acidic polysaccharide that exists in the form of mixtures of potassium, magnesium, and calcium salts. The monomeric components of the free acid (arabic acid) are D-galactose, L-arabinose, L-rhamnose, and D-glucuronic acid.

[0095] Galactomannans (guar, carob, fennel, tara gum) and derivatives (guar phosphate, hydroxypropyl guar, etc.)

[0096] Galactomannans are non-ionic polysaccharides extracted from the endosperm of legume seeds, of which they constitute the storage carbohydrate.

[0097] Galactomannans are macromolecules consisting of a main chain of D-mannopyranose motifs with [3(1,4)] linkages, bearing lateral branches consisting of a single D-galactopyranose motif linked by an α(1,6) linkage to the main chain. The various galactomannans differ, on the one hand, in the proportion of α-D-galactopyranose motifs present in the polymer, and, on the other hand, in significant differences in terms of the distribution of galactose motifs along the mannose chain.

[0098] The mannose / galactose (M / G) ratio is approximately 2 for guar gum, 3 for tara gum and 4 for carob gum.

[0099] Guar

[0100] Guar gum is characterized by a mannose / galactose ratio of approximately 2 / 1. The galactose group is regularly distributed along the mannose chain.

[0101] The guar gums that can be used according to the present invention can be non-ionic, cationic, or anionic. According to the present invention, chemically modified or unmodified non-ionic guar gums can be used.

[0102] Non-ionic unmodified guar gums are, for example, the products sold under the names Vidogum GH, Vidogum G and Vidocrem by Unipektin and under the name Jaguar by Rhodia, under the name Guar by Danisco, under the name ViscogumTM by Cargill, and under the name guar gum by Aqualon.

[0103] Non-ionic hydrolyzed guar gums that can be used according to the present invention are represented, for example, by the products sold under the name by the company Danisco.

[0104] The modified non-ionic guar gums that can be used according to the present invention are preferably modified by Cl-6 hydroxyalkyl groups, among which we may mention, for example, the hydroxymethyl, hydroxyethyl, hydroxypropyl and hydroxybutyl groups.

[0105] Such non-ionic guar gums optionally modified by hydroxyalkyl groups are sold, for example, under the trade names Jaguar HP 60, Jaguar HP 105 and Jaguar HP 120 (hydroxypropyl guar) by the company Rhodia or under the name HP (hydroxypropyl guar) by the company Aqualon.

[0106] Cationic galactomannan gums preferably have a cationic charge density less than or equal to 1.5 meq / g, more particularly between 0.1 and 1 meq / g. The charge density can be determined by the Kjeldahl method. It generally corresponds to a pH of the range of 3 to 9.

[0107] In general, for the purposes of the present invention, the term "cationic galactomannan gum" means any galactomannan gum containing cationic groups and / or groups that can be ionized into cationic groups.

[0108] Preferred cationic groups are chosen from those comprising primary, secondary, tertiary and / or quaternary amine groups.

[0109] The cationic galactomannan gums used generally have an average molecular mass by weight between 500 and about 5 x 106 and preferably between about 103 and about 3 x 106.

[0110] Cationic galactomannan gums that can be used according to the Examples of the present inventions are gums comprising trialkylammonium cationic groups in (Cl-4). Preferably, 2% to 30% by number of the hydroxyl functions of these gums bear trialkylammonium cationic groups.

[0111] Among these trialkylammonium groups, special mention can be made of the trimethylammonium and triethylammonium groups.

[0112] Even more preferably, these groups represent 5% to 20% by weight relative to the total weight of the modified galactomannan gum.

[0113] According to the present invention, the cationic galactomannan gum is preferably a guar gum comprising hydroxypropyltrimethylammonium groups, i.e. a modified guar gum, for example, by 2,3-epoxypropyltrimethylammonium chloride.

[0114] These galactomannan gums, in particular guar gums modified by cationic groups, are products already known as such and are, for example, described in US patents 3,589,578 and 4,031,307.

[0115] The anionic guar gums that can be used according to the present invention are polymers comprising groups derived from carboxylic, sulfonic, sulfenic, phosphoric, phosphonic, or pyruvic acids. Preferably, the anionic group is a carboxylic acid group. The anionic group may also be in the form of an acidic salt, in particular a sodium, calcium, lithium, or potassium salt.

[0116] The anionic guar gums that can be used according to the present invention are preferably derivatives of carboxymethyl guar (carboxymethyl guar or carboxymethyl hydroxypropyl guar).

[0117] Carob

[0118] Carob gum is extracted from the seeds of the carob tree (Ceratonia siliqua).

[0119] Unmodified carob gum which may be used in the present invention is sold, for example, under the name ViscogumTM by the company Cargill, under the name Vidogum L by the company Unipektin and under the name LBG by the company Danisco.

[0120] The chemically modified carob gums that can be used in the present invention can be represented, for example, by the cationic carobs sold under the name Catinal CLB (carob hydroxypropyltrimonium chloride) by the Toho company.

[0121] Tara gum

[0122] Tara gum which can be used in the context of the present invention is sold, for example, under the name Vidogum SP by the company Unipektin.

[0123] Furthermore, agars are galactose polysaccharides contained in the cell wall of some of these species of red algae (rhodophyceae). They are formed from a polymer group whose basic skeleton is a [3(1,3) D- chain galactopyranose and an α(1,4)L3-6 anhydrogalactose chain, these motifs repeating regularly and alternately. Differences within the agar family are due to the presence or absence of solvated methyl or carboxyethyl groups. These hybrid structures are generally present in varying percentages, depending on the seaweed species and the harvest season.

[0124] Agar-agar is a mixture of polysaccharides (agarose and agaropectin) with a high molecular weight, between 40,000 and 300,000 g. mol-1. It is obtained by manufacturing algae extraction liquors, generally by autoclaving, and by treating these liquors which comprise about 2% agar-agar, so as to extract the latter.

[0125] Agar is produced, for example, by the B&V Agar Producers group under the names Gold Agar, Agarite and Grand Agar by the company Hispanagar, and under the names Agar-Agar, QSA (Quick Soluble Agar) and Puragar by the company Setexam.

[0126] Preferably, the second polysaccharide is selected from carrageenan, xanthan gum, gellan gum, pectin, chitosan and mixtures thereof; more preferably, selected from gellan gum.

[0127] Xanthan gum is a heteropolysaccharide produced on an industrial scale by the aerobic fermentation of the bacterium Xanthomonas campestris. Its structure, like cellulose, consists of a backbone of 3-D-glucose linked in the [3(1,4)] mode. One of the two glucose molecules has a trisaccharide side chain composed of α-D-mannose, 3-D-glucuronic acid, and terminal 3-D-mannose. The internal mannose residues are generally acetylated at carbon 6. Approximately 30% of the terminal mannose residues have pyruvate groups linked in a chelated form between carbons 4 and 6. The glucuronic acid and the charged pyruvic acid can be ionized, thus resulting in the anionic nature of xanthan gum (negative charge up to pH 1). The content of pyruvate residues and acetate residues varies depending on the species, the fermentation process, the post-fermentation conditions and the purification steps.These groups can be neutralized in commercial products with Na+, K+, or Ca2+ ions (Satia, 1986). The neutralized form can be converted to the acidic form by ion exchange or dialysis using an acidic solution. Xanthan gum has a viscosity of 0.6 to 1.65 Pa.s (Brookfield viscometer, type LVT, measured at 60 rpm at 25 °C) for an aqueous composition comprising a molecular weight of 1,000,000 to 50,000,000 and 1% xanthan gum. Xanthan gum, for example, products sold under the trade name Rhodicare by Rhodia Chimie, products sold by Cargill Texturizing Solutions, Inc. under the trade name Satiaxane™ (food, cosmetic and pharmaceutical industries), ADM, Inc. under the trade name Novaxan™ and products sold by CP-Kelco under the trade names Kelzan® and Keltrol®.

[0128] Gellan gum is a linear anionic heteropolysaccharide based on oligoside motifs composed of four saccharides (tetrasaccharides). D-glucose, L-rhamnose, and D-glucuronic acid in a 2:1:1 ratio are present in gellan gum as monomeric components. It is sold, for example, under the name Kelcogel CG LA by the company CP Kelco.

[0129] Pectins are linear polymers of α-D-galacturonic acid (at least 65%) linked at positions 1 and 4, with a certain proportion of carboxyl groups esterified with a methanol group. Approximately 20% of the sugars constituting the pectin molecule are neutral sugars (L-rhamnose, D-glucose, D-galactose, L-arabinose, D-xylose). L-rhamnose residues are found in all pectins, incorporated into the main chain at positions 1 and 2. The uronic acid molecules bear carboxyl groups. This function gives pectins the ability to exchange ions when they are in the COO⁻ form. Divalent ions (in particular calcium) have the ability to form ionic bridges between two carboxyl groups of two different pectin molecules. In nature, a certain proportion of carboxylic groups are esterified with a methanol group.The natural degree of esterification of a pectin can range from 70% (apple, lemon) to 10% (strawberry), depending on the source. By using pectins with a high degree of esterification, it is possible to hydrolyze the -COOCH3 groups to obtain weakly esterified pectins. Depending on the proportion of methylated and unmethylated monomers, the chain is therefore more or less acidic. HM (high methoxy) pectins are thus defined as having a degree of esterification greater than 50%, and LM (low methoxy) pectins are defined as having a degree of esterification less than 50%. In the case of amidated pectins, the -OCH3 group is substituted by an -NH2 group. Pectins are notably sold by Cargill under the name Unipectine™, by CP-Kelco under the name Genu, and by Danisco under the name Grinsted Pectin.

[0130] Carrageenans are anionic polysaccharides constituting the cell walls of various red algae (Rhodophyceae) belonging to the families Gigartinaceae, Hypneaceae, Furcellariaceae, and Polyideaceae. They are generally obtained by hot aqueous extraction from natural strains of said algae. These linear polymers, formed by disaccharide units, are composed of two D-galactopyranose units linked alternately by α(1,3) and [3(1,4)] bonds. They are highly sulfated polysaccharides (20 to 50%), and the αD-galactopyranosyl residues may be in the 3,6-anhydro form. Depending on the number and position of the sulfate ester groups on the repeating disaccharide of the molecule, several types of carrageenans are distinguished, namely: kappa-carrageenans, which have one sulfate ester group, and iota-carrageenans, which have two ester groups. sulfate, and lambda-carrageenans, which contain three sulfate ester groups. Carrageenans are composed primarily of potassium, sodium, magnesium, triethanolamine, and / or calcium salts of polysaccharide sulfate esters. Carrageenans are sold, notably, by SEPPIC under the name Solagum®, by Gelymar under the names Carragel®, Carralact®, and Carrasol®, by Cargill under the names Satiagel™ and Satiagum™, and by CP-Kelco under the names Genulacta®, Genugel®, and Genuvisco®.

[0131] Chitosan is a linear polysaccharide composed of randomly distributed [3-(1→4)] D-glucosamine (deacetylated unit) and N-acetyl-D-glucosamine (acetylated unit). It is prepared by treating the chitinous shells of shrimp and other crustaceans with an alkaline substance, such as sodium hydroxide.

[0132] Preferably, the second polysaccharide is present in an amount ranging from about 0.01% by weight to about 5% by weight, preferably from about 0.05% by weight to about 3% by weight, or from about 0.08% by weight to about 1% by weight, relative to the total weight of the composition.

[0133] Preferably, the weight ratio of the first polysaccharide to the second polysaccharide is from about 0.05 to 4, preferably from about 0.1 to 4, advantageously from about 0.1 to 2, in particular from about 1:1. Salts

[0134] In addition, the present composition used in the present invention may further comprise a salt, for example a salt obtained by an acid and / or a base.

[0135] For example, the acid may be selected from citric acid, maleic acid, acetic acid, salicylic acid, lactic acid, glycolic acid, phytic acid, tartaric acid, malic acid, fumaric acid and the like, and mixtures thereof; the bases such as sodium and calcium hydroxide, sodium and calcium phosphate, such as monosodium phosphate or disodium phosphate, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium hydroxide, triethylamine potassium hydroxide and the like, and mixtures thereof.

[0136] Advantageously, when the present composition used in the present invention comprises a first polysaccharide and the salt component, the present composition has a further improved transformation sensation.

[0137] Preferably, the salt is present in an amount ranging from about 0.5% by weight to about 15% by weight, preferably from about 2% by weight to about 12% by weight, or from about 4% by weight to about 10% by weight, relative to the total weight of the composition. Oily phase

[0138] Preferably, the composition according to the invention comprises an oily phase.

[0139] The oily phase of the composition according to the invention may include fatty substances of all kinds and in appropriate levels which are known to a person skilled in the art.

[0140] The term "fatty substance" refers to an organic compound insoluble in water at 25 °C and atmospheric pressure (1.013 x 105Pa) (solubility less than 5% by weight, and preferably less than 1% by weight, even more preferably less than 0.1% by weight).

[0141] Preferably, the fatty substances have in their structure at least one hydrocarbon chain including at least 6 carbon atoms and / or a sequence of at least two siloxane groups. In addition, the fatty substances are generally soluble in organic solvents under the same conditions of temperature and pressure, for example, chloroform, dichloromethane, carbon tetrachloride, ethanol, benzene, toluene, tetrahydrofuran (THF), liquid petroleum jelly or decamethyl cyclopentasiloxane.

[0142] Preferably, the fatty substances comprise liquid fatty substances (oils) and non-liquid fatty substances such as solid or gaseous fatty substances.

[0143] Here, oils refer to fatty substances (i) having a melting point less than or equal to 25 °C, preferably less than or equal to 20 °C, at atmospheric pressure (1.013 x 10⁵ Pa). In other words, these fatty substances are liquid at atmospheric pressure and are not in a solid or gaseous state.

[0144] The oils may be selected from mineral oils, vegetable or synthetic oils, and silicone oils, and mixtures thereof. For example, vegetable oils may be selected from jojoba oil, avocado oil, sesame oil, sunflower oil, corn oil, soybean oil, safflower oil, or grapeseed oil; mineral oils may be selected from liquid petroleum jelly, hydrogenated or non-hydrogenated isoparaffins, or isohexadecane; Synthetic oils can be chosen from paream, isopropyl myristate, cetearyl octanoate, polyisobutylene, ethylhexyl palmitate or alkyl benzoate; silicone oils, including volatile or non-volatile silicone oil, can be chosen from polydimethylsiloxanes (PDMS), cyclodimethylsiloxanes or cyclomethicones, as well as mixtures of these oils.

[0145] The non-liquid fatty substances may be selected from sorbitan fatty acid esters, fatty acid esters such as stearate esters, behenate esters, arachidate esters, palmitate esters, fatty acid esters of a sugar, and mixtures thereof. In other cases, the non-liquid fatty substances may be selected from purcelline oil (cetearyl octanoate), isopropyl myristate, isopropyl palmitate, C12-C15 alkyl benzoate, 2-ethylphenyl benzoate, isopropyl lanolate, hexyl laurate, dii-sopropyl adipate, isononyl isononanoate, oleyl erucate, 2-ethylhexyl palmitate, isostearyl isostearate, diisopropyl sebacate, octanoates, decanoates or ricinoleates of alcohols or polyalcohols, hydroxylated esters and esters of pentaerythritol, and mixtures thereof.

[0146] The fatty substances that can be used in the present invention are (poly)oxyalkylated or (poly)glycerolated.

[0147] Preferably, the composition of the present invention further comprises at least one fatty substance selected from diisopropyl sebacate, diisopropyl adipate, isononyl isononanoate, isostearyl isostearate and mixtures thereof. Aqueous phase

[0148] The composition according to the invention may comprise an aqueous phase of any kind and appropriate contents which are known to a person skilled in the art.

[0149] The term "aqueous phase" here refers to everything that constitutes the dispersed phase, namely: water, water-miscible organic solvents and water-soluble or water-dispersible additives.

[0150] Water-miscible organic solvents that may be mentioned include, for example, linear or branched monoalcohols containing 1 to 8 carbon atoms, for example ethanol, propanol, isopropanol, butanol or isobutanol; polyethylene glycols containing 4 to 80 ethylene oxides; and polyols, for example glycerol, propylene glycol, isoprene glycol and butylene glycol.

[0151] Water-soluble additives that may be mentioned, for example, include mono-, di- or trivalent mineral salts; water-soluble UV-protective agents; and sugars such as glucose, sucrose, trehalose, sorbitol, lactose, fructose, xylose or maltose.

[0152] More preferably, the present composition, preferably for the treatment of keratinous materials, in particular for skin, comprises: relative to the total weight of the composition,

[0153] (a) at least 0.08% by weight to 1% by weight of at least a first polysaccharide chosen from diutan gum, welane gum and mixtures thereof;

[0154] (b) at least 0.1% by weight to 2% by weight of at least one amphoteric surfactant chosen from among the lecithins;

[0155] (c) at least 1% by weight to 3% by weight of a co-surfactant, selected from an alcohol linear fat having 16 to 26 carbon atoms. cosmetic uses

[0156] Another subject of the present invention is to provide a method for treating keratinous materials, such as skin, comprising applying to the keratinous materials a composition according to the present invention, so as to provide a sensation of transformation as disclosed in the present invention. Uses of the preparations

[0157] Another subject of the present invention is to provide a method for preparing a cosmetic product for the treatment of keratinous materials, such as skin, comprising a composition according to the present invention, which provides a sensation of transformation as disclosed in the present invention. Cosmetic product

[0158] Another subject of the present invention is to provide a cosmetic product including a composition having good stability and an improved transformation sensation as disclosed in the present invention and optionally other functional agents in addition to, for example, non-limited active agents, solubilizers, cosmetically acceptable carriers and the like.

[0159] More comprehensive but not exhaustive lists of useful components in the compositions disclosed herein are presented below.

[0160] According to the present invention, the composition further optionally comprises at least one active agent, which is almost any acceptable active agent in a cosmetic product, and / or any suitable emollient.

[0161] The compositions optionally include one or more solubilizers. Various solubilizers are well known in the art and may be useful for the compositions described herein. In some cases, the one or more solubilizers may be, for example, one or more cosmetically acceptable hydrotopes.

[0162] The composition according to the present invention may include at least one preservative, conventionally used for cosmetic products.

[0163] The following examples are intended to illustrate the present invention without however limiting its scope. EXAMPLES

[0164] The quantities / concentrations of ingredients in the compositions / formulas described below are expressed as % by weight, relative to the total weight of each composition / formula. I. Preparation

[0165] 1. The raw materials used in the examples of the invention and the comparative examples.

[0166] [Tables 1] INCI name Trade name Supplier C20-22 ALCOHOL NAFOL 2022 FR SASOL HYDROGENATED LECITHIN NIKKOL LECINOL S10 NIKKO DIUTAN GUM KELCO-CARE™ DIUTAN GUM LUBRIZOL GELLAN GUM KELCOGEL® CG LA CP KELCO DIISOPROPYL SEBACATE DUB™ DIS STEARINERIE DUBOIS 1. Examples 1 to 3 and comparative examples 1 to 5:

[0167] Compositions of the invention No. 1 to 3 and comparative compositions No. 1 to 5 were prepared as indicated in Table 2.

[0168] Preparation process: • (1) Diisopropyl sebacate, water, hydrogenated lecithin (the case if applicable) and C20-22 alcohol (if applicable) were added to a main tank and thoroughly mixed at 80 °C and homogenized to obtain mixture A; • (2) Lactic acid, NaOH, diutan gum (if applicable), Gellan gum (if applicable) and xanthan gum (if applicable) were added to mixture A obtained in step (1), and mixed until a homogeneous mixture B was obtained; • (3) the mixture B obtained in step 2) was cooled to 25 °C.

[0169] [Tables2] Expl Exp2 Exp3 Cepl Cep2 Cep3 Cep4 Cep5 Hydrogenated lecithin 0.4 0.4 0.4 - 0.4 0.4 0.4 - C2O-22 alcohol 1.9 1.9 1.9 - 1.9 1.9 - 1.9 Diutan gum 0.1 0.1 0.2 0.1 - - 0.1 0.1 Gellan gum 0.1 - - - - 0.1 0.1 0.1 Xanthan gum - 0.1 - 0.1 - 0.1 - - Diisopropyl sebacate 8 8 8 8 8 8 8 8 Lactic acid 5 5 5 5 5 5 5 5 NaOH 2.82 2.82 2.82 2.82 2.82 2.82 2.82 2.82 WATER (QS) Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100

[0170] II. Evaluation of the compositions of the invention and comparative studies 1. Rheological characterizations

[0171] Rheology was measured using a rheology measuring instrument with the Anton Paar MCR301 rheological testing machine, spindle code model: cc027.

[0172] Test pattern: amplitude sweep

[0173] Shear stress: 0.01-200%

[0174] Shear speed: 10 s 1

[0175] K = (G0'-Gl') / y

[0176] AG = G0'-G0”

[0177] G0': the initial storage module

[0178] G0”: the initial lost module

[0179] Gl': the storage module when the curves G' and G" begin to intersect.

[0180] y: shear stress.

[0181] Stability was determined using the centrifugal technique. Weigh 10 g of each composition, then place each composition in a centrifuge at 900 rpm for 1 hour. Then remove each composition from the centrifuge and observe each composition. If there is no phase separation, no oil, and no appearance of fatty alcohol crystals, the composition is evaluated. it is rated as "stable", otherwise it is rated as "unstable".

[0182] Here, the term "phase separation" means that the emulsification system is not stable, that the aqueous phase and the oily phase are not totally separated, that the emulsification system is partially separated from the aqueous / oily phase.

[0183] The term "absence of oil" means that the emulsifying system cannot be formed, the aqueous phase and the oily phase are totally separated.

[0184] The compositions of the present invention and comparatives were evaluated and the results of the tests were presented in Table 3 as follows.

[0185] [Tables3] Expl Exp2 Exp3 Cepl Cep2 Cep3 Cep4 Cep5 Centrifugat ion (900 rcf, Ih) Stable Stable Stable Stable Unstable: phase separation Unstable: Phase separation Unstable: Absence of oil Unstable: Absence of oil, A crystal of fatty alcohol appears K 12.0 4 8.73 79.15 0.97 23.5 9.4 NA NA AG 121.96 69.0 8 203.1 5 2.6 7.54 42.02 NA NA Results of the trials

[0186] We can see that examples 1-3 are all stable, no phase separation, no absence of oil and / or no fatty alcohol has appeared.

[0187] The K value and the AG value can be used to assess the sensation of transformation. The higher the K (K = (G0'-Gr) / y) and AG (AG = G0'-G0”) values, the more evident the improvement in the sensation of transformation.

[0188] Compositions are considered acceptable if they have a K value greater than 2 and an AG value greater than 10.

[0189] All compositions of the invention are considered acceptable and have a good transformation feel and good stability.

[0190] As for Cepl, the Cepl compositions including only component (a) first polysaccharide without component (b) amphoteric surfactant and component (c) co-surfactant, exhibit less favorable rheological characterization compared to the compositions according to the present invention (e.g., Examples 1-3).

[0191] As for Cep2, the Cep2 composition including only the amphoteric surfactant component (b) and the co-surfactant component (c) without the first polysaccharide component (a) exhibits less favorable rheological characterization and is not considered acceptable, compared to the compositions according to the present invention (e.g., Examples 1-3).

[0192] As regards Cep3, the Cep3 composition including the polysaccharide other than component (a) the first polysaccharide, and including component (b) amphoteric surfactant and component (c) co-surfactant has less stability, and is not considered acceptable, compared to the compositions according to the present invention (for example, Examples 1-3).

[0193] As for Cep4, the Cep4 composition including the first polysaccharide component (a) and the amphoteric surfactant component (b) without the co-surfactant component (c) has less stability, and is not considered acceptable, compared to the compositions according to the present invention (for example, Examples 1-3).

[0194] As for Cep5, the Cep5 composition including component (a) the first polysaccharide and component (c) the co-surfactant without component (b) the amphoteric surfactant has worse stability and is not considered acceptable compared to the compositions according to the present invention (e.g., Examples 1-3). III. Conclusion

[0195] The composition disclosed in the present invention is superior in terms of beneficial properties, for example: stability, transformative effect, compared to the comparative. In addition, the compositions of inventive examples 1 to 3 are more durable.

Claims

1. Claims Composition, preferably for the treatment of keratinous materials, in particular for the skin, comprising: (a) at least one first polysaccharide; (b) at least one amphoteric surfactant; (c) at least one co-surfactant, chosen from a linear fatty alcohol having 14 to 30 carbon atoms; in which the first polysaccharide has the following formula (I): R (I) in which - R represents a radical chosen from rhamnose, mannose, galactose, arabinose, xylose, fucose, or

2. - M belongs to an ionic group or to an ionizable group, preferably M represents a counterion derived from an alkali metal or an alkaline earth metal, or a counterion derived from an inorganic ammonium or an organic amine; - n represents at least 200. Composition according to claim 1, in which M represents a counterion selected from a sodium, potassium, calcium, magnesium, ammonium ion or a counterion derived from an organic amine; or - n represents at least 1000, in particular at least 3000, or less than 20,000, especially less than 10,000, or 500 to 10,000, especially 1,000 to 7,000.

3. A composition according to claim 1 or 2, wherein the first polysaccharide is selected from diutan gum, welan gum and mixtures thereof.

4. A composition according to any preceding claim, wherein the amphoteric surfactant is selected from the group consisting of betaines, such as (C8-C20) alkylbetaines; (C8-C20) al-kylamido (C1-C6) alkylbetaines such as cocamidopropylbetaine; sul-fobetaines such as (C8-C20) alkylsulfobetaines, (C8-C20) alkylamido (C1-C6) alkylsulfobetaines; amino acids, such as glycine, (C8-C20) alkyl polyaminocarboxylates; (C8-C20) alkylamphoacetates, (C8-C20) alkylamphodiacetates; phospholipids such as lecithins, hydrogenated lecithins; salts thereof; derivatives thereof and mixtures thereof; preferably chosen from hydrogenated lecithins.

5. Composition according to any one of the preceding claims, in which the co-surfactant is chosen from the group of linear C14-C28 fatty alcohols, preferably linear C16-C26 fatty alcohols, or in particular linear C20-C22 fatty alcohols.

6. Composition according to any one of the preceding claims, wherein the weight ratio of amphoteric surfactant to co-surfactant is from 1:1 to 1:10, preferably from 1:1 to 1:8, even from 1:1 to 1:7, in particular from 1:1.5 to 1:6, advantageously from 1:2 to

7. 1 .U. A composition according to any preceding claim, wherein the composition further comprises a second polysaccharide different from the first polysaccharide, selected from natural polysaccharides, for example, pectin, xanthan gum, cellulose gum, dextrin, carrageenan, gelatin, gellan gum, guar gum, cellulose ether derivatives, such as hydroxyethylcellulose, hydroxypropylcellulose, hydroxyethylmethylcellulose, hydroxypropylmethylcellulose, methylhydroxyethylcellulose, starch, chitosan such as hydroxypropyl chitosan, hydroxypropyl guar, karaya gum, kelp, locust bean gum, microcrystalline cellulose, natto gum, pullulan, alginates such as sodium alginate, potassium alginate, propylene glycol alginate, sclerotium gum, sodium carboxymethyl dextran, cellulose sulfate, sodium, tragacanth gum, locust bean gums, biosaccharide gum, mucilages such as cactus mucilage, bacterial cell wall peptidoglycan, and mixtures thereof, preferably the second polysaccharide is selected from carrageenan, xanthan gum, gellan gum, pectin, chitosan and mixtures thereof; preferably selected from gellan gum.

8. A composition according to any preceding claim, wherein the composition further comprises a salt, for example a salt obtained by acid and / or base.

9. A method of treating keratinous materials, such as the skin, comprising the application to the keratinous materials of a composition according to any one of the preceding claims 1 to 8.

10. Use of the composition according to any one of the preceding claims 1 to 8 for preparing a product for the treatment of keratinous materials such as the skin.