Compositions for skin care
The composition, featuring a first polysaccharide, amphoteric surfactant, and co-surfactant, addresses the challenge of providing sustainable skin care with improved sensory and stability, effectively reducing petrochemical reliance and promoting renewable materials.
Patent Information
- Application Number
- PCT/CN2023/119816
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-09-19
- Publication Date
- 2025-03-27
AI Technical Summary
Existing cosmetic compositions struggle to provide sustainable, environmentally-friendly solutions for skin care that offer improved transforming sensory with good stability, while reducing the use of petrochemical compounds and promoting renewable raw materials.
A composition comprising at least one first polysaccharide with ionic or ionizable groups, an amphoteric surfactant, and a co-surfactant, preferably in the form of a liquid emulsion, which provides superior transforming sensory and stability for skin care.
The composition achieves enhanced transforming sensory and stability, aligning with sustainability goals by utilizing renewable materials and reducing petrochemical usage, thus offering a more environmentally-friendly skin care solution.
Smart Images

Figure PCTCN2023119816-FTAPPB-I100001 
Figure PCTCN2023119816-FTAPPB-I100002 
Figure PCTCN2023119816-FTAPPB-I100003
Abstract
Description
COMPOSITIONS FOR SKIN CAREFIELD OF THE INVENTION
[0001] The present invention relates to a composition for treating keratin material, especially for the skin, especially for providing transforming sensory to skin with good stability. Further, the present invention relates to use of same.BACKGROUND
[0002] 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 injury, micro-organisms, and ultraviolet damage. The health and appearance of skin, however, can deteriorate due to environmental factors, genetic makeup, nutrition, and sun exposure.
[0003] Transforming sensory together with stability are sought as one of the most desirable properties in the cosmetic / personal care industry.
[0004] In addition, the formulation of environmentally-friendly cosmetic products, which are designed and developed considering environmental issues, is becoming a major goal 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, particularly by promoting the use of renewable raw materials and / or materials with a good index of naturalness 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 desire new and improved compositions, which is more sustainable and can provide personal care / makeup products with improved transforming sensory with good stability.
[0008] SUMMARY OF THE DISCLOSURE
[0009] The inventors have discovered that a composition, preferably for treating keratin materials, particularly for skin, comprising: (a) at least one first polysaccharide; (b) at least one amphoteric surfactant; (c) at least one co-surfactant, selected from a linear fatty alcohol having 14-30 carbon atoms; in which, 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 main chain, which have good stability and are able to deliver a superior transforming sensory.
[0010] Another subject of the present invention is use of the composition according to the present invention for treating keratin materials, especially the skin. This use may manifest itself as a process for treating keratin materials, especially the skin, comprising the steps of applying to said keratin materials.
[0011] Another subject of the present invention is use of the composition according to the present invention for preparing a cosmetic product of treating keratin materials, especially the skin.
[0012] Preferably, the composition according to the present invention is in form of a liquid emulsion, e.g., 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 (W / O / W) emulsion, comprising an aqueous phase and oily phase, optionally further comprising an acceptable active agent or the like.
[0013] Other characteristics and advantages of the present invention will emerge more clearly on reading the description and the examples that follows.
[0014] DETAILED DESCRIPTION OF THE DISCLOSURE
[0015] Throughout the description, including the claims, the term "comprising a" should be understood as being synonymous with "comprising at least one" , unless otherwise mentioned.
[0016] Throughout the description, including the claims, an embodiment defined with “comprising” or the like should be understood to encompass a preferable embodiment defined with “consisting substantially of” and a preferable embodiment defined with “consisting of” .
[0017] Moreover, the expression "at least one" used in the present description is equivalent to the expression "one or more" , including one, two, if any, three and the like.
[0018] The terms “a, ” “an, ” and “the” are understood to encompass the plural as well as the singular.
[0019] The term “about” when referring to a value, is meant specifically that a measurement can be rounded to the value using a standard convention for rounding numbers. For example, “about 1.5” is 1.45 to 1.54. All values set forth herein can be modified with the term “about, ” if desired to impart the meaning above, or recited without the term, regardless of whether the term “about” is specifically set forth (or is absent) in conjunction with any particular value in the specification.
[0020] All ranges and values disclosed herein are inclusive and combinable. For examples, any value or point described herein that falls within a range described herein can serve as a minimum or maximum value to derive a sub-range, etc.
[0021] As used herein, the term “keratin materials” refer to the skin and the lip. By “skin” , we intend to mean all the body skin, including the scalp. Preferably, the “keratin material” according to the present invention is the skin. Still preferably, the keratin material is the face, or the neck, especially the face.
[0022] As used herein, the term “ionizable group” means any group which, either by its intrinsic chemical nature, or as a function of the medium and / or of the pH of the medium in which it is present, may be in ionic form.
[0023] The term "transforming sensory" is understood to mean the following phenomenon: the product (for example, being in the form of a gel or an emulsion) which can even be thick, is transformed into a fluid or even water during application to the skin, as if it was found on the skin. During this transformation, an aqueous film is visible (visible water droplets) .
[0024] First polysaccharides
[0025] The composition according to the invention comprises at least one first polysaccharide.
[0026] The first polysaccharide is a polysaccharide, in which its monomer bears both a main chain and a side chain and has at least one ionic group or at least one ionizable group in main chain, wherein the first polysaccharide has the following formula (I) :
[0027] in which
[0028] -R represents a radical selected from rhamnose, mannose, galactose, arabinose, xylose, fucose, or
[0029] -M belongs to an ionic group or an ionizable group, preferably represents a counter ion derived from an alkali metal or alkaline-earth metal, or a counter ion derived from an inorganic ammonium or organic amine; preferably, M represents a counter ion selected from sodium, potassium, calcium, magnesium, ammonium ion or a counter ion derived from an organic amine.
[0030] -n represents at least 200, preferably at least 1000, particularly at least 3000, or less than 20000, particularly less than 10000, or from 500 to 10000, especially from 1000 to 7000.
[0031] Preferably, the first polysaccharide is chosen from the following polysaccharides: diutan gum, welan gum, and mixtures thereof; preferably diutan gum.
[0032] Preferably, the first polysaccharide is present in an amount ranging from about 0.01 wt. %to about 5 wt. %, preferably from about 0.05 wt. %to about 3 wt. %, or from about 0.08 wt. %to about 1 wt. %, relative to the total weight of the composition.
[0033] Amphoteric surfactants
[0034] The composition according to the invention comprises at least one amphoteric surfactant.
[0035] For the purposes of the present invention, the term “amphoteric surfactants” is intended to encompass those surfactants conventionally called as both "amphoteric surfactant" and “zwitterionic surfactant” .
[0036] Preferably, the amphoteric surfactants are selected from (C8-C20) alkylbetaines, (C8-C20) alkylamido (C1-C6) alkylbetaines, such as cocamidopropylbetaine, sulfobetaines (also called sultaines) 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.
[0037] More preferably, the amphoteric surfactants are selected from phospholipids such as lecithins, hydrogenated lecithins, salts thereof, derivatives thereof and mixtures thereof.
[0038] As (C8-C20) alkylbetaines, mention may notably be made of cocobetain like the product marketed under the name of DEHYTON by Cognis, laurylbetain like the product marketed under the name of GENAGEN by Clariant, oxyethylene laurylbetain (10 EO) , like the product marketed under the name of LAURYLETHER (10 EO) by Shin Nihon Rica, oxyethylene stearylbetain (10 EO) like the product marketed under the name of STEARYLETHER (10 EO) by Shin Nihon Rica.
[0039] Among the (C8-C20) alkylamido (C1-C6) alkylbetaines, mention may for example be made of cocamidopropyl betaine like the products marketed under the name of LEBON 2000 by Sanyo, under the name of EMPIGENby Albright&Wilson, under the names of Tego Betain F 50 and CK D by EVONIK GOLDSCHMIDT, or further those marketed as a mixture with glyceryl laurate like the commercial references Tego Betain HS or Antil HS 60 from EVONIK GOLDSCHMIDT, lauramidopropyl betaine like the product marketed under the name of REWOTERIC by Witco.
[0040] As sultains, mention may be made of (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 the one marketed under the name of CROSULTAIN by Croda.
[0041] As (C8-C20) alkyl polyaminocarboxylates (APAC) , mention may be made of sodium cocoylpolyamino-carboxylate, such as the one marketed under the name of AMPHOLAK 7 and AMPHOLAK 7 by AkzoNobel, sodium stearyl-polyamidocarboxylate such as the one marketed under the name of AMPHOLAK 7 TX / C by AkzoNobel, sodium carboxymethyloleyl-polypropylamine, such as the one marketed under the name of AMPHOLAKby AkzoNobel.
[0042] As C8-C20 alkyldiamphoacetates, mention may for example be made of N-di-sodium N-cocoyl-N-carboxymethoxyethyl-N-carboxymethyl-ethylenediamine (CTFA name: disodium cocamphodiacetate) like the product marketed under the name of MIRANOL C2M CONCENTREby Rhodia Chimie, and N-sodium N-cocoyl-N-hydroxyethyl-N-carboxymethyl-ethylenediamine (CTFA name: sodium cocamphoacetate) like the one sold by Evonik Goldschmidt under the name Rewoteric AM C.
[0043] As C8-C20 alkylamphodiacetates, mention may be made of disodium cocoamphodiacetate, disodium lauroamphodiacetate, disodium caproamphodiacetate, disodium capryloamphodiacetate, disodium cocoamphodipropionate, disodium lauroamphodipropionate, disodium caproamphodipropionate, disodium capryloamphodipropionate, lauroamphodipropionic acid and cocoampho-idipropionic acid. Examples that may be mentioned include the cocoamphodiacetate sold by the company Rhodia under the trade nameC2M Concentrate.
[0044] Among phospholipids mention may be made of lecithins such as the product marketed by the NIKKOL group (Lecinol Series) or further lecithins marketed by CARGIL / LUCAS MEYER (the family of EMULMETIKS of EMULFLUIDS) .
[0045] In particular, lecithin and a derivative of lecithin can be preferably used. Amongst others, hydrogenated lecithin can be used advantageously.
[0046] The amphoteric surfactant is preferably present in an amount ranging from about 0.05 wt. %to about 10 wt. %, preferably from about 0.08 wt. %to about 5 wt. %, or from about 0.1 wt. %to about 2 wt. %, relative to the total weight of the composition.
[0047] Co-surfactant
[0048] The composition according to the present invention comprises at least one co-surfactant selected from linear fatty alcohols having 14-30 carbon atoms.
[0049] Amongst others, the co-surfactant in the composition according to the present invention has a regular long carbon chain structure, e.g., linear C14-C30 fatty alcohol.
[0050] Preferably, the co-surfactant is a linear, saturated, C14-C30 fatty alcohol.
[0051] Preferably, the linear, saturated C14-C30 fatty alcohol is chosen from linear, saturated C14-C28 fatty alcohols, preferably linear, saturated C16-C28 fatty alcohols, more preferably from linear, saturated C18-C26 fatty alcohols, or even from linear, saturated C20-C22 fatty alcohols or mixtures thereof.
[0052] More preferably, the co-surfactant is chosen from linear, saturated C14-C28 fatty alcohols, preferably linear, saturated C16-C28 fatty alcohols, more preferably from linear, saturated C18-C26 fatty alcohols, or even from linear, saturated C20-C22 fatty alcohols or mixtures thereof.
[0053] The linear, saturated C14-C28 fatty alcohol (s) that are of use in the context of the present invention are notably C14 fatty alcohol (s) for examples myristyl alcohol (C14) , C16 fatty alcohol (s) for examples cetyl alcohol or hexadecanol (C16) , C18 fatty alcohol (s) for examples stearyl alcohol or octadecanol (C18) , C20 fatty alcohol (s) for examples arachidyl alcohol (C20) , or C22 fatty alcohol (s) for examples behenyl alcohol (C22) , or mixtures thereof.
[0054] Preferably, the co-surfactant according to the invention is chosen from C20 fatty alcohol (s) for examples arachidyl alcohol (C20) , or C22 fatty alcohol (s) for examples behenyl alcohol (C22) , or mixtures thereof.
[0055] The co-surfactant is present in an amount ranging from about 0.1 wt. %to about 10 wt. %, preferably from about 0.5 wt. %to about 8 wt. %, or from about 1 wt. %to about 5 wt. %, relative to the total weight of the composition.
[0056] Preferably, the co-surfactant is present in an amount ranging from about 0.1 wt. %to about 10 wt. %, preferably from about 2 wt. %to about 5 wt. %, or from about 1 wt. %to about 3 wt. %, relative to the total weight of the composition.
[0057] Preferably, the weight ratio of the amphoteric surfactant to 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, particularly ranges from about 1: 1.5 to about 1: 6, advantageously from about 1: 2 to about 1: 6.
[0058] Second polysaccharide
[0059] The present composition may further comprise a second polysaccharide different from the first polysaccharide.
[0060] Preferably, the second polysaccharide is a natural polysaccharide.
[0061] Generally, natural polysaccharide means a polysaccharide obtainable from nature. For the purposes of the present invention, however, the term “natural polysaccharide” is intended to also encompass "polysaccharide of natural origin" , which denotes a polysaccharide obtained by modification of a polysaccharide obtainable from nature.
[0062] In general, the second polysaccharide that is suitable for use in the present invention may be homopolysaccharides such as fructans, glucans, galactans and mannans or heteropolysaccharides such as hemicellulose, and mixtures thereof.
[0063] Similarly, the second polysaccharide may be linear polysaccharides such as pullulan or branched polysaccharides such as gum arabic and amylopectin, or mixed polysaccharides such as starch.
[0064] Preferably, the second polysaccharide is chosen from ones produced by microorganisms; polysaccharides isolated from algae, and higher plant polysaccharides, such as homogeneous polysaccharides, in particular celluloses and derivatives thereof or fructosans, heterogeneous polysaccharides such as gum arables, galactomannans, glucomannans, and derivatives thereof; and mixtures thereof.
[0065] More preferably, the second polysaccharide is chosen from homogeneous polysaccharides, in particular celluloses and derivatives thereof or fructosans, heterogeneous polysaccharides such as gum arables, galactomannans, glucomannans, and derivatives thereof; and mixtures thereof.
[0066] As an example of the second polysaccharide, mention can be made of fructans, gellans, glucans, amylose, amylopectin, glycogen, pullulan, dextrans, celluloses and derivatives thereof, such as methylcelluloses, hydroxyalkylcelluloses, ethylhydroxyethylcelluloses and carboxymethylcelluloses, mannans, xylans, lignins, arabans, galactans, galacturonans, chitin, chitosans, glucuronoxylans, arabinoxylans, xyloglucans, glucomannans, arabinogalactans, glycosaminoglucans, gum arables, tragacanth gums, ghatti gums, locust bean gums, galactomannans such as guar gums and nonionic derivatives thereof, in particular hydroxypropyl guar, and ionic derivatives thereof, biopolysaccharide gums of microbial origin, in particular sclerotium gum, e.g., scleroglucan, or xanthan gum, mucopolysaccharides, and in particular chondroitin sulfates, and mixtures thereof. These second polysaccharide may be chemically modified, especially with urea or urethane groups or by hydrolysis, oxidation, esterification, etherification, sulfatation, phosphatation, amination, amidation or alkylation reaction, or by several of these modifications.
[0067] The derivatives obtained may be anionic, cationic, amphoteric.
[0068] These second polysaccharide that are suitable for use in the present invention may be distinguished according to whether they are derived from microorganisms, from algae or from higher plants, and are detailed below.
[0069] Polysaccharides produced by microorganisms
[0070] Dextran and dextran sulfate
[0071] Dextran is a neutral polysaccharide not bearing any charged groups, which is biologically inert, prepared by fermentation of beet sugar containing solely hydroxyl groups. It is possible to obtain dextran fractions of different molecular weights from native dextran by hydrolysis and purification. Dextran may in particular be in the form of dextran sulfate.
[0072] Dextran is represented, for example, by the products sold under the name Dextran or Dextran T by the company Pharmacosmos, or under the name Dextran 40 Powder or Dextran 70 Powder by the company Meito Sangyo Co. Dextran sulfate is sold by the company PK Chemical A / S under the name Dextran sulfate.
[0073] Succinoglycan
[0074] Succinoglycan is an extracellular polymer of high molecular weight produced by bacterial fermentation, consisting of octasaccharide repeating units (repetition of 8 sugars) . Succinoglycans are sold, for example, under the name Rheozan by the company Rhodia.
[0075] Polysaccharides isolated from algae
[0076] Furcellaran
[0077] Furcellaran is obtained commercially from red algae Furcellaria fasztigiata. Furcellaran is produced, for example, by the company Est-Agar.
[0078] Polysaccharides from plants
[0079] This category of polysaccharides may be divided into homogeneous polysaccharides (only one saccharide species) and heterogeneous polysaccharides composed of several types of saccharides.
[0080] a) Homogeneous polysaccharides and derivatives thereof
[0081] The polysaccharide according to the present invention may be chosen from celluloses and derivatives or fructosans.
[0082] Cellulose and derivatives
[0083] The polysaccharide according to the present invention may also be a cellulose or a derivative thereof, especially cellulose ethers or esters (e.g. methylcellulose, carboxymethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxymethylpropylcellulose, cellulose acetate, cellulose nitrate, nitrocellulose) .
[0084] The present invention may also contain a cellulose-based associative polymer.
[0085] According to the present invention, the term "cellulose-based associative polymer" means any polysaccharide compound bearing in its structure linear sequences of anhydroglucopyranose residues (AGU) linked together via β (1, 4) bonds. The repeating unit is the cellobiose dimer. The AGUs are in chair conformation and bear 3 hydroxyl functions: 2 secondary alcohols (in position 2 and 3) and a primary alcohol (in position 6) . The polymers thus formed combine together via intermolecular bonds of hydrogen bond type, thus giving the cellulose a fibrillar structure (about 1500 molecules per fibre) .
[0086] The degree of polymerization differs enormously depending on the origin of the cellulose; its value may range from a few hundred to several tens of thousands.
[0087] The hydroxyl groups of cellulose may react partially or totally with various chemical reagents to give cellulose derivatives having intrinsic properties. The cellulose derivatives may be anionic, cationic, amphoteric or nonionic. Among these derivatives, cellulose ethers, cellulose esters and cellulose ester ethers are distinguished.
[0088] 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 hydroxyalkylalkylcelluloses such as hydroxypropylmethylcelluloses, hydroxy-ethylmethylcelluloses, hydroxy ethylethylcelluloses and hydroxybutylmethylcelluloses.
[0089] Among the anionic cellulose ethers, mention may be made of carboxyalkylcelluloses and salts thereof. By way of example, mention may be made of carboxymethylcelluloses, carboxymethylmethylcelluloses and carboxymethylhydroxy-ethylcelluloses and sodium salts thereof.
[0090] Among the cationic cellulose ethers, mention may be made of crosslinked or non-crosslinked, quaternized hydroxyethylcelluloses.
[0091] 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 hydroxy ethylcellulosehydroxypropyltrimethylammonium.
[0092] The quaternized cellulose derivatives are, in particular:
[0093] -quaternized celluloses modified with groups comprising at least one fatty chain, such as alkyl, arylalkyl or alkylaryl groups comprising at least 8 carbon atoms, or mixtures thereof,
[0094] -quaternized hydroxyethylcelluloses modified with groups comprising at least one fatty chain, such as alkyl, arylalkyl or alkylaryl groups comprising at least 8 carbon atoms, or mixtures thereof.
[0095] The alkyl radicals borne by the above quaternized celluloses or hydroxyethylcelluloses preferably contain from 8 to 30 carbon atoms. The aryl radicals preferably denote phenyl, benzyl, naphthyl or anthryl groups.
[0096] Examples of quaternized alkylhydroxyethylcelluloses containing C8-30 fatty chains that may be indicated 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 (C18 alkyl) sold by the company Amerchol and the products Crodacel QM, Crodacel QL (C12 alkyl) and Crodacel QS (C18 alkyl) sold by the company Croda.
[0097] Among the cellulose derivatives, mention may also be made of:
[0098] -celluloses modified with groups comprising at least one fatty chain, for instance hydroxyethylcelluloses modified with groups comprising at least one fatty chain, such as alkyl groups, especially of C8-22, arylalkyl and alkylaryl groups, such as Natrosol Plus Grade 330 CS (C16 alkyls) sold by the company Aqualon, and
[0099] -celluloses modified with polyalkylene glycol alkylphenyl ether groups, such as the product Amercell Polymer HM-1500 (nonylphenyl polyethylene glycol (15) ether) sold by the company Amerchol.
[0100] Among the cellulose esters are mineral esters of cellulose (cellulose nitrates, sulfates, phosphates, etc. ) , organic cellulose esters (cellulose monoacetates, triacetates, amidopropionates, acetatebutyrates, acetatepropionates and acetatetrimellitates, etc. ) , and mixed organic / mineral esters of cellulose, such as cellulose acetatebutyrate sulfates and cellulose acetatepropionate sulfates. Among the cellulose ester ethers, mention may be made of hydroxypropylmethylcellulose phthalates and ethylcellulose sulfates.
[0101] The cellulose-based associative polymer of the present invention may be chosen from unsubstituted celluloses and substituted celluloses. The celluloses and derivatives are represented, for example, by the products sold under the name Cekol (carboxymethylcellulose) by the company Noviant (CP-Kelco) , under the name Akucell AF (sodium carboxymethylcellulose) by the company Akzo Nobel, under the name MethocelTM (cellulose ethers) and EthocelTM (ethylcellulose) by the company Dow, and under the names (carboxymethylcellulose and sodium carboxymethylcellulose) , (methylcellulose) , BlanoseTM (carboxymethylcellulose) , (methylcellulose, hydroxypropylmethylcellulose) , (hydroxypropylcellulose) , (cetylhydroxyethylcellulose) and CS (hydroxy ethylcellulose) by the company Hercules Aqualon.
[0102] Fructosans
[0103] The polysaccharide according to the present invention may especially be a fructosan chosen from inulin and derivatives thereof (especially dicarboxy and carboxymethyl inulins) .
[0104] Fructans or fructosans are oligosaccharides or polysaccharides comprising a sequence of anhydrofructose units optionally combined with several saccharide residues 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, in particular enzymatic. Fructans generally have a degree of polymerization from 2 to about 1000 and preferably from 2 to about 60.
[0105] Three groups of fructans are distinguished. The first group corresponds to products whose fructose units are for the most part linked via β (2, 1) bonds. These are essentially linear fructans such as inulins.
[0106] The second group also corresponds to linear fructoses, but the fructose units are essentially linked via β (2, 6) bonds. These products are levans.
[0107] The third group corresponds to mixed fructans, i.e. containing β (2, 6) and β (2, 1) sequences. These are essentially branched fructans, such as graminans.
[0108] The preferred fructans in the compositions according to the present invention are inulins. Inulin may be obtained, for example, from chicory, dahlia or Jerusalem artichoke, preferably from chicory.
[0109] In particular, the polysaccharide, especially the inulin, has a degree of polymerization from 2 to about 1000 and preferably from 2 to about 60, and a degree of substitution of less than 2 on the basis of one fructose unit.
[0110] 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.
[0111] b) Heterogeneous polysaccharides and derivatives thereof
[0112] The polysaccharides that may be used according to the present invention may be gums, for instance cassia gum, karaya gum, konjac gum, gum tragacanth, tara gum, acacia gum or gum arabic.
[0113] Gum arabic
[0114] Gum arabic is a highly branched acidic polysaccharide which is in the form of mixtures of potassium, magnesium and calcium salts. The monomer elements of the free acid (arabic acid) are D-galactose, L-arabinose, L-rhamnose and D-glucuronic acid.
[0115] Galactomannans (guar, locust bean, fenugreek, tara gum) and derivatives (guar phosphate, hydroxypropyl guar, etc. )
[0116] Galactomannans are nonionic polyosides extracted from the endosperm of leguminous seeds, of which they constitute the storage carbohydrate.
[0117] Galactomannans are macromolecules consisting of a main chain of β (1, 4) -linked D-mannopyranose units, bearing side branches consisting of a single D-galactopyranose unit α (1, 6) -linked to the main chain. The various galactomannans differ, firstly, by the proportion of α-D-galactopyranose units present in the polymer, and secondly, by significant differences in terms of distribution of galactose units along the mannose chain.
[0118] The mannose / galactose (M / G) ratio is about 2 for guar gum, 3 for tara gum and 4 for locust bean gum.
[0119] Guar
[0120] Guar gum is characterized by a mannose / galactose ratio of the order of 2 / 1. The galactose group is regularly distributed along the mannose chain.
[0121] The guar gums that may be used according to the present invention may be nonionic, cationic or anionic. According to the present invention, use may be made of chemically modified or unmodified nonionic guar gums.
[0122] The unmodified nonionic guar gums are, for example, the products sold under the names Vidogum GH, Vidogum G and Vidocrem by the company Unipektin and under the name Jaguar by the company Rhodia, under the nameGuar by the company Danisco, under the name ViscogumTM by the company Cargill, and under the name guar gum by the company Aqualon.
[0123] The hydrolysed nonionic guar gums that may be used according to the present invention are represented, for example, by the products sold under the nameby the company Danisco.
[0124] The modified nonionic guar gums that may be used according to the present invention are preferably modified with C1-6 hydroxyalkyl groups, among which mention may be made, for example, of hydroxymethyl, hydroxyethyl, hydroxypropyl and hydroxybutyl groups.
[0125] Such nonionic guar gums optionally modified with 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 nameHP (hydroxypropyl guar) by the company Aqualon.
[0126] The cationic galactomannan gums preferably have a cationic charge density of less than or equal to 1.5 meq. / g, more particularly between 0.1 and 1 meq. / g. The charge density may be determined by the Kjeldahl method. It generally corresponds to a pH of the order of 3 to 9.
[0127] 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.
[0128] The preferred cationic groups are chosen from those comprising primary, secondary, tertiary and / or quaternary amine groups.
[0129] The cationic galactomannan gums used generally have a weight-average molecular mass of between 500 and 5×106 approximately and preferably between 103 and 3×106 approximately.
[0130] The cationic galactomannan gums that may be used according to the present invention are, for example, gums comprising tri (C1-4) alkylammonium cationic groups. Preferably, 2%to 30%by number of the hydroxyl functions of these gums bear trialkylammonium cationic groups.
[0131] Among these trialkylammonium groups, mention may be made most particularly of trimethylammonium and triethylammonium groups.
[0132] Even more preferentially, these groups represent from 5%to 20%by weight relative to the total weight of the modified galactomannan gum.
[0133] According to the present invention, the cationic galactomannan gum is preferably a guar gum comprising hydroxypropyltrimethylammonium groups, i.e., a guar gum modified, for example, with 2, 3-epoxypropyltrimethylammonium chloride.
[0134] These galactomannan gums, in particular guar gums modified with cationic groups are products already known per se and are, for example, described in patents US 3 589 578 and US 4 031 307.
[0135] The anionic guar gums that may be used according to the present invention are polymers comprising groups derived from carboxylic, sulfonic, sulfenic, phosphoric, phosphonic or pyruvic acid. The anionic group is preferably a carboxylic acid group. The anionic group may also be in the form of an acid salt, especially a sodium, calcium, lithium or potassium salt.
[0136] The anionic guar gums that may be used according to the present invention are preferentially carboxymethyl guar derivatives (carboxymethyl guar or carboxymethyl hydroxypropyl guar) .
[0137] Locust bean
[0138] Locust bean gum is extracted from the seeds of the locust bean tree Ceratonia siliqua) .
[0139] The unmodified locust bean gum that 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.
[0140] The chemically modified locust bean gums that may be used in the present invention may be represented, for example, by the cationic locust beans sold under the name Catinal CLB (locust bean hydroxypropyltrimonium chloride) by the company Toho.
[0141] Tara gum
[0142] The tara gum that may be used in the context of the present invention is sold, for example, under the name Vidogum SP by the company Unipektin.
[0143] In addition, 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 base backbone is a β (1, 3) D-galactopyranose and α (1, 4) L 3-6 anhydrogalactose chain, these units repeating regularly and alternately. The 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 variable percentage, depending on the species of algae and the harvest season.
[0144] Agar-agar is a mixture of polysaccharides (agarose and agaropectin) of high molecular mass, between 40000 and 300000 g. mol-1. It is obtained by manufacturing algal extraction liquors, generally by autoclaving, and by treating these liquors which comprise about 2%of agar-agar, so as to extract the latter.
[0145] Agar is produced, for example, by the group B&V Agar Producers 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.
[0146] Preferably, the second polysaccharide is chosen from carrageenan, xanthan gum, gellan gum, pectin, chitosan, and mixtures thereof; more preferably, chosen from gellan gum.
[0147] Xanthan gum is a heteropolysaccharide produced on an industrial scale by aerobic fermentation of the bacterium Xanthomonas campestris. Its structure, like cellulose, is composed of a backbone of β-D-glucose linked in a β (1, 4) mode. One of the two glucose molecules has a trisaccharide side chain composed of α-D-mannose, β-D-glucuronic acid and terminal β-D-mannose. Internal mannose residues are generally acetylated on carbon 6. About 30%of the terminal mannose residues have pyruvate groups linked in a chelate form between carbon 4 and carbon 6. Glucuronic acid and charged pyruvic acid can be ionized and thus cause the anionic nature of xanthan (negative charge up to pH 1) . The content of pyruvate residues and acetate residues varies depending on the species, fermentation process, post-fermentation conditions and purification steps. These groups can be neutralized in commercial products with Na+, K+or Ca 2+ions (Satia, 1986) . The neutralized form can be converted to the acid form by ion exchange or dialysis using an acid solution. Xanthan gum has a viscosity of 0.6 to 1.65 Pa.s (Brookfield viscometer, LVT type, measured at 60 revolutions / minute at 25℃. ) 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 that are sold under the trade name Rhodicare by the company Rhodia Chimie, products that are sold by Cargill Texturizing Solutions, Inc. under the trade name Satiaxane TM (food, cosmetic and pharmaceutical industry) , ADM, Inc. under the trade name Novaxan TM, and products sold by CP-Kelco under the trade names and
[0148] Gellan gum is an anionic linear heteropolyoside based on oligoside units composed of 4 saccharides (tetra-oside) . D-Glucose, L-rhamnose and D-glucuronic acid in 2: 1: 1 proportions are present in gellan gum in the form of monomer elements. It is sold, for example, under the name Kelcogel CG LA by the company CP Kelco.
[0149] Pectins are linear polymers of α-D-galacturonic acid (at least 65%) linked in positions 1 and 4 with a certain proportion of carboxylic groups esterified with a methanol group. About 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 in positions 1, 2. Uronic acid molecules bear carboxyl functions. This function gives pectins the capacity for exchanging ions, when they are in COO-form. Divalent ions (in particular calcium) have the capacity of forming ionic bridges between two carboxyl groups of two different pectin molecules. In the natural state, a certain proportion of the carboxylic groups are esterified with a methanol group. The natural degree of esterification of a pectin may range between 70% (apple, lemon) and 10% (strawberry) depending on the source used. Using pectins with a high degree of esterification it is possible to hydrolyse the-COOCH3 groups, so as to obtain weakly esterified pectins. Depending on the proportion of methylated or non-methylated monomers, the chain is thus more or less acidic. HM (high-methoxy) pectins are thus defined as having a degree of esterification of greater than 50%, and LM (low-methoxy) pectins are defined as having a degree of esterification of less than 50%. In the case of amidated pectins, the-OCH3 group is substituted with a-NH2 group. Pectins are especially sold by the company Cargill under the name UnipectineTM, by the company CP-Kelco under the name Genu, and by Danisco under the name Grinsted Pectin.
[0150] Carrageenans are anionic polysaccharides constituting the cell walls of various red algae (Rhodophyceae) belonging to the Gigartinacae, Hypneaceae, Furcellariaceae and Polyideaceae families. 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 β (1, 4) bonds. They are highly sulfated polysaccharides (20-50%) and the α-D-galactopyranosyl residues may be in 3, 6-anhydro form. Depending on the number and position of sulfate-ester groups on the repeating disaccharide of the molecule, several types of carrageenans are distinguished, namely: kappa-carrageenans, which bear one sulfate-ester group, iota-carrageenans, which bear two sulfate-ester groups, and lambda-carrageenans, which bear three sulfate-ester groups. Carrageenans are composed essentially of potassium, sodium, magnesium, triethanolamine and / or calcium salts of polysaccharide sulfate esters. Carrageenans are sold especially by the company SEPPIC under the name by the company Gelymar under the names and by the company Cargill, under the names SatiagelTM and SatiagumTM, and by the company CP-Kelco under the names and
[0151] Chitosan is a linear polysaccharide composed of randomly distributed β- (1→4) -linked D-glucosamine (deacetylated unit) and N-acetyl-D-glucosamine (acetylated unit) . It is made by treating the chitin shells of shrimp and other crustaceans with an alkaline substance, such as sodium hydroxide.
[0152] Preferably, the second polysaccharide is present in an amount ranging from about 0.01 wt. %to about 5 wt. %, preferably from about 0.05 wt. %to about 3 wt. %, or from about 0.08 wt. %to about 1 wt. %, relative to the total weight of the composition.
[0153] Preferably, the weight ratio of the first polysaccharide to the second polysaccharide ranges from about 0.05 to 4, preferably from about 0.1 to 4, advantageously from about 0.1 to 2, particularly about 1: 1.
[0154] Salts
[0155] Additionally, 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.
[0156] For examples, 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, potassium hydroxide triethylamine and the like, and mixtures thereof.
[0157] Advantageously, where the present composition used in the present invention comprising a first polysaccharide and the component of salt, the present composition has further improved transformative sensory.
[0158] Preferably, the salt is present in an amount ranging from about 0.5 wt. %to about 15 wt. %, preferably from about 2 wt. %to about 12 wt. %, or from about 4 wt. %to about 10 wt. %, relative to the total weight of the composition.
[0159] Oily phase
[0160] Preferably, the composition according to the invention comprises an oily phase.
[0161] The oily phase of the composition according to the invention may comprise fatty substances of any kind and suitable contents that are known to those skilled in the art.
[0162] The term "fatty substance" is intended to mean an organic compound that is insoluble in water at 25℃ and at atmospheric pressure (1.013x105 Pa) (solubility of less than 5%by weight, and preferably less than 1%by weight, even more preferentially less than 0.1%by weight) .
[0163] Preferably, the fatty substances have in their structure at least one hydrocarbon-based 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 temperature and pressure conditions, for instance chloroform, dichloromethane, carbon tetrachloride, ethanol, benzene, toluene, tetrahydrofuran (THF) , liquid petroleum jelly or decamethyl cyclopentasiloxane.
[0164] Preferably, the fatty substances comprise liquid fatty substances (oils) and non-liquid fatty substances like solid or gaseous fatty substances.
[0165] Here, oils mean fatty substances (i) with a melting point of less than or equal to 25℃, preferably less than or equal to 20℃, at atmospheric pressure (1.013xl05 Pa) . In other words, these fatty substances are liquid at atmospheric pressure, and are not in the solid or gaseous state.
[0166] The oils may be chosen from mineral oils, plant or synthetic oils, and silicone oils, and mixtures thereof. For example, oils of plant origin may be selected from jojoba oil, avocado oil, sesame oil, sunflower oil, corn oil, soybean oil, safflower or grape pip oil) ; mineral oils may be selected from liquid petroleum j elly, hydrogenated or non-hydrogenated isoparaffins or isohexadecane; synthetic oils may be selected from parleam, isopropyl myristate, cetearyl octanoate, polyisobutylene, ethylhexyl palmitate or alkyl benzoate, silicone oils including volatile or non-volatile silicone oil, may be selected from polydimethylsiloxanes (PDMSs) , cyclodimethylsiloxanes or cyclomethicones, as well as mixtures of these oils.
[0167] Non-liquid fatty substances may be chosen from sorbitan fatty esters, fatty acid esters such as esters of stearates, esters of behenates, esters of arachidates, esters of palmitates, fatty acid esters of a sugar, and mixtures thereof. In further instances, the non-liquid fatty substances may be chosen from purcellin oil (cetearyl octanoate) , isopropyl myristate, isopropyl palmitate, C12-C15 alkyl benzoate, 2-ethylphenyl benzoate, isopropyl lanolate, hexyl laurate, diisopropyl adipate, isononyl isononanoate, oleyl erucate, 2-ethylhexyl palmitate, isostearyl isostearate, diisopropyl sebacate, octanoates, decanoates or ricinoleates of alcohols or polyalcohols, hydroxylated esters, and pentaerythritol esters, and mixtures thereof.
[0168] The fatty substances that may be used in the present invention are (poly) oxyalkylenated or (poly) glycerolated.
[0169] 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.
[0170] Aqueous phase
[0171] The composition according to the invention may comprise an aqueous phase of any kind and suitable contents that are known to those skilled in the art.
[0172] The expression "aqueous phase" means herein everything which constitutes the dispersed phase, i.e. the water, the organic solvents miscible with water, and the water-soluble or water-dispersible additives.
[0173] The organic solvents miscible with water, which may be mentioned include, for example, linear or branched monoalcohols containing from 1 to 8 carbon atoms, for instance ethanol, propanol, isopropanol, butanol or isobutanol; polyethylene glycols containing from 4 to 80 ethylene oxides; and polyols, for instance glycerol, propylene glycol, isoprene glycol and butylene glycol.
[0174] Water-soluble additives which may be mentioned, for example, include mono-, di-or trivalent mineral salts; water-soluble UV screening agents; and sugars such as glucose, sucrose, trehalose, sorbitol, lactose, fructose, xylose or maltose.
[0175] More preferably, the present composition, preferably for treating keratin materials, particularly for skin, comprises: relative to the total weight of the composition,
[0176] (a) at least 0.08 wt. %to 1 wt. %of at least one first polysaccharide chosen from diutan gum, welan gum and mixtures thereof;
[0177] (b) at least 0.1 wt. %to 2 wt. %of at least one amphoteric surfactant chosen from lecithins;
[0178] (c) at least 1 wt. %to 3 wt. %of one co-surfactant, selected from a linear fatty alcohol having 16 to 26 carbon atoms.
[0179] Cosmetic uses
[0180] Another subject of the present invention is to provide a process of treating the keratin materials, such as skin, comprising the application on the keratin materials of a composition according to the present invention, so as to provide a transforming sensory as disclosed in the present invention.
[0181] Preparation uses
[0182] Another subject of the present invention is to provide a process of preparing a cosmetic product of treating the keratin materials, such as skin, comprising a composition according to the present invention, which provides a transforming sensory as disclosed in the present invention.
[0183] Cosmetic product
[0184] Another subject of the present invention is to provide a cosmetic product including a composition with good stability and improved transforming sensory as disclosed in present invention and optionally other functional agents in addition, for example, non-limited, active agents, solubilizers, cosmetically acceptable carriers and the like.
[0185] More exhaustive but non-limiting lists of components useful in the instant compositions disclosed herein are presented below.
[0186] According to the present invention, the composition optionally further comprises at least one active agent, which is almost of all acceptable active agent in one cosmetic product, and / or any suitable emollients.
[0187] 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 can be, for example, one or more cosmetically acceptable hydrotopes.
[0188] The composition according to the present invention may comprise at least one preservative, conventionally used for cosmetics.
[0189] The following examples are intended to illustrate the present invention without limiting the scope as a result.EXAMPLES
[0190] The ingredient amounts / concentrations in the compositions / formulas described below are expressed in%by weight, relative to the total weight of each composition / formula.
[0191] I. Preparation
[0192] 1. The raw materials used in invention examples and comparative examples.
[0193] 2. Examples 1-3 and comparative examples 1-5:
[0194] The invention compositions No. 1-3 and comparative compositions No. 1-5 were prepared as shown in Table 1.
[0195] Preparation process:
[0196] - (1) Diisopropyl sebacate, aqua, hydrogenated lecithin (if presents) , and C20-22 alcohol (ifpresents) were added to a main kettle and well mixed at 80℃ and homogenized to obtain a mixture A;
[0197] - (2) Lactic acid, NaOH, diutan gum (if presents) , gellan gum (if presents) , and xanthan gum (if presents) were added in the mixture A obtained in the step (1) , and mixed until a homogeneous mixture B obtained;
[0198] - (3) the mixture B obtained in the step 2) was cooled to 25℃.
[0199] Table 1
[0200] II. Evaluation of the invention and comparative compositions
[0201] 1. Rheology characterizations
[0202] The rheology was measured by using an instrument for measuring rheology with Rheology Test Machine MCR301 Anton paar, Spindle code model: cc027.
[0203] Test model: amplitude sweep
[0204] shear strain: 0.01~200%
[0205] Shear rate: 10 s-1
[0206] K= (G0'-G1') / γ
[0207] ΔG=G0'-G0”
[0208] G0': the initial storage modulus
[0209] G0”: the initial lost modulus
[0210] G1': the storage modulus when G’ and G” curves start to cross.
[0211] γ: shear stress.
[0212] The stability was determined by using centrifugal technique. Weigh 10g of each composition, then put each composition in a centrifuge with centrifugation at 900rcf for 1 hour. Then take each composition out of the centrifuge and observe each composition. If there is no phase separation, no out of oil, and no fatty alcohol crystal appeared, the composition is evaluated as “stable” , otherwise, it is evaluated as “not stable” .
[0213] Here, the term “phase separation” means emulsifying system isn’t stable, water phase and oil phase are not totally separated, emulsifying system is partially separated from the water phase / oil phase.
[0214] The term “out of oil” means emulsifying system can’t be formed, water phase and oil phase are totally separated.
[0215] The present invention and comparative compositions were evaluated and the test results were shown in Table 2 as follows.
[0216] Table 2: Test results
[0217] It can be seen that examples 1-3 are all stable, no phase separation, no out of oil, and / or no fatty alcohol appeared.
[0218] K value and ΔG value can be used to evaluate transforming sensory. The higher the values of K (K= (G0'-G1') / γ) and ΔG (ΔG=G0'-G0”) are, the more obviously improved transformative sensory.
[0219] The compositions are considered as acceptable if they have a value of K greater than 2 and a value of ΔG greater than 10.
[0220] All the compositions of the invention are considered as acceptable and have good transforming sensory and stability.
[0221] As for the Cep1, the compositions Cep1 only including the component (a) first polysaccharide without the component (b) amphoteric surfactant and the component (c) co-surfactant, has worse rheology characterizations, compared to the compositions according to the present invention (e.g., Examples 1-3) .
[0222] As for the Cep2, the composition Cep2 only including the component (b) amphoteric surfactant and the component (c) co-surfactant without the component (a) first polysaccharide has worse rheology characterizations and is not considered as acceptable, compared to the compositions according to the present invention (e.g., Examples 1-3) .
[0223] As for the Cep3, the composition Cep3 including the polysaccharide other than component (a) the first polysaccharide, and including the component (b) amphoteric surfactant and the component (c) co-surfactant has worse stability, and is not considered as acceptable, compared to the compositions according to the present invention (e.g., Examples 1-3) .
[0224] As for the Cep4, the composition Cep4 including the component (a) first polysaccharide and the component (b) amphoteric surfactant without the component (c) co-surfactant has worse stability, and is not considered as acceptable, compared to the compositions according to the present invention (e.g., Examples 1-3) .
[0225] As for the Cep5, the composition Cep5 including the component (a) first polysaccharide and the component (c) co-surfactant without the component (b) amphoteric surfactant has worse stability, and is not considered as acceptable, compared to the compositions according to the present invention (e.g., Examples 1-3) .
[0226] III. Conclusion
[0227] The present composition disclosed in the present invention is superior in terms of beneficial properties, e.g. stable, transforming sensory, over the comparative one. In addition, compositions of the inventions examples 1-3 are more sustainable.
[0228] All publications and patent applications cited in this specification are herein incorporated by reference, and for any and all purposes, as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. In the event of an inconsistency between the present invention and any publications or patent application incorporated herein by reference, the present invention controls.
Claims
1.A composition, preferably for treating keratin materials, particularly for skin, comprising:(a) at least one first polysaccharide;(b) at least one amphoteric surfactant;(c) at least one co-surfactant, selected from a linear fatty alcohol having 14-30 carbon atoms;in which, the first polysaccharide has the following formula (I) :in which- R represents a radical selected from rhamnose, mannose, galactose, arabinose, xylose, fucose, or- M belongs to an ionic group or an ionizable group, preferably M represents a counter ion derived from an alkali metal or alkaline-earth metal, or a counter ion derived from an inorganic ammonium or organic amine;- n represents at least 200.2.The composition as claimed in claim 1, wherein M represents a counter ion selected from sodium, potassium, calcium, magnesium, ammonium ion or a counter ion derived from an organic amine; or- n represents at least 1000, particularly at least 3000, or less than 20000, particularly less than 10000, or from 500 to 10000, especially from 1000 to 7000.3.The composition as claimed in claim 1 or 2, wherein the first polysaccharide is chosen from diutan gum, welan gum and mixtures thereof.4.The composition as claimed in any one of the preceding claims, wherein the first polysaccharide is present in an amount ranging from 0.01 wt. %to 5 wt. %, preferably from 0.05 wt. %to 3 wt. %, or from 0.08 wt. %to 1 wt. %, relative to the total weight of the composition.5.The composition as claimed in any one of the preceding claims, wherein the amphoteric surfactant is selected from the group consisting of betaines, such as (C8-C20) alkylbetaines; (C8-C20) alkylamido (C1-C6) alkylbetaines such as cocamidopropylbetaine; sulfobetaines 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 selected from hydrogenated lecithin.6.The composition as claimed in any one of the preceding claims, wherein the amphoteric surfactant is present in an amount ranging from 0.05 wt. %to 10 wt. %, preferably from 0.08 wt. %to 5 wt. %, or from 0.1 wt. %to 2 wt. %, relative to the total weight of the composition.7.The composition as claimed in any one of the preceding claims, wherein the co-surfactant is selected from the group C14-C28 linear fatty alcohol, preferably C16-C26 linear fatty alcohols, or particularly C20-C22 linear fatty alcohols.8.The composition as claimed in any one of the preceding claims, wherein the co-surfactant is present in an amount ranging from 0.1 wt. %to 10 wt. %, preferably from 2 wt. %to 5 wt. %, or from 1 wt. %to 3 wt. %, relative to the total weight of the composition.9.The composition as claimed in any one of the preceding claims, wherein the weight ratio of the amphoteric surfactant to the co-surfactant ranges from 1: 1 to 1: 10, preferably from 1: 1 to 1: 8, even from 1: 1 to 1: 7, particularly ranges from 1: 1.5 to 1: 6, advantageously from 1: 2 to 1: 6.10.The composition as claimed in any one of the preceding claims, wherein the composition further comprises a second polysaccharide different from the first polysaccharide, chosen from natural polysaccharides, for example, pectin, xanthan gum, cellulose gum, dextrin, carrageenan, gelatin, gellan gum, guar gum, cellulose ether derivatives, such as hydroxyethylcellulose, hydroxypropylcellulose, hydroxyethyl methylcellulose, hydroxypropyl methylcellulose, methyl hydroxyethylcellulose, 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, sodium cellulose sulfate, tragacanth gum, locust bean gums, biosaccharide gum, mucilages such as cactus mucilage, peptidoglycan from the cell wall of bacteria, and mixtures thereof, preferably, the second polysaccharide is chosen from carrageenan, xanthan gum, gellan gum, pectin, chitosan and mixtures thereof; preferably, chosen from gellan gum.11.The composition as claimed in claim 10, wherein the second polysaccharide is present in an amount ranging from 0.01 wt. %to 5 wt. %, preferably from 0.05 wt. %to 3 wt. %, or from 0.08 wt. %to 1 wt. %, relative to the total weight of the composition.12.The composition as claimed in any one of the preceding claims 10 to 11, wherein the weight ratio of the first polysaccharide to the second polysaccharide ranges from 0.05 to 4, preferably from 0.1 to 4, advantageously from 0.1 to 2, particularly 1: 1.13.The composition as claimed in any one of the preceding claims, wherein the composition further comprises a salt, for example a salt obtained by acid and / or base.14.A process of treating the keratin materials, such as skin, comprising the application on the keratin materials of a composition as claimed in any one of the preceding claims 1 to 13.15.A use of the composition as claimed in any one of the preceding claims 1 to 13 for preparing a product for treating keratin materials such as skin.
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