Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/34—Alcohols
  • A61K8/345—Alcohols containing more than one hydroxy group
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/73—Polysaccharides
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/73—Polysaccharides
  • A61K8/737—Galactomannans, e.g. guar; Derivatives thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
  • A61K8/8141—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
  • A61K8/8147—Homopolymers or copolymers of acids; Metal or ammonium salts thereof, e.g. crotonic acid, (meth)acrylic acid; Compositions of derivatives of such polymers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
  • A61K8/8141—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
  • A61K8/8158—Homopolymers or copolymers of amides or imides, e.g. (meth) acrylamide; Compositions of derivatives of such polymers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q19/00—Preparations for care of the skin

Definitions

• the present invention relates to a composition, in particular a cosmetic or dermatological composition for caring for the skin.
• the present invention relates to a composition, in particular a cosmetic or dermatological composition, having a low amount, in particular free of preservatives and good stability as well as cosmetic properties.
• the present invention relates to a composition for caring for the skin, substantially free of preservative, in particular free of paraben.
• masks are known to have high efficacy on the skin. As a result, a market growth of mask cosmetic products was seen.
• the masks are grouped to three main categories: tissue masks, the dominant and most developed category; leave-on masks without tissue, such as sleeping masks used at night; and rinse-off masks without tissue, such as the clay mask for cleansing of the skin.
• compositions can easily be sterilized. Notably some compositions cannot be really sterilized as, upon sterilization, and in particular upon steam sterilization, their viscosity degrades, i.e. the dynamic viscosity of the composition is affected by the sterilization.
• compositions in particular a cosmetic or dermatological composition, which can undergo sterilization, and in particular steam sterilization.
• compositions that provide to the skin mildness feeling after application, and meanwhile undergo sterilization process, without an unacceptable change in viscosity.
• compositions are expected to have good cosmetic properties, such as hydration, moisturizing, or fresh feelings after application.
• the present invention aims to provide a solution to the above mentioned problems.
• the invention aims to solve the technical problem consisting of providing a composition, in particular a cosmetic or dermatological composition, having a mild feeling after application, in particular having a mild feeling after application as a mask composition, i.e., long-term application on the skin, such as 5 to 15 minutes of application.
• One aim of the present invention is to solve the technical problem consisting of providing a composition, in particular a cosmetic or dermatological composition, having a low amount of preservatives.
• the composition is essentially free of preservatives, and more particularly free of paraben.
• One preferred aim of the present invention is to solve the technical problem consisting of providing a composition, in particular a cosmetic or dermatological composition, having together mildness feeling after application and a low amount of preservatives, or preferably free of preservatives, in particular free of paraben.
• One aim of the present invention is to solve the technical problem consisting of providing a composition, in particular a cosmetic or dermatological composition, forming a mask on a keratin material and especially skin, and providing mildness feeling after application with a low amount, or essentially free of preservative compounds, said composition being stable upon sterilization process.
• composition as mentioned above provides to the keratin materials, in particular the skin, a good cosmetic properties, and in particular good hydration and moisturizing properties.
• Another aim of the present invention is to solve the technical problem consisting of providing a composition, in particular a cosmetic or dermatological composition, which present optimized concentration for optimal stability, cosmetic or dermatological benefit and stable upon sterilization process.
• composition comprising, in an aqueous phase:
• the present invention thus relates to such compositions.
• the dynamic viscosity of prior art compositions drops upon sterilization, wherein pressure and /or heat were applied. Such a drop in dynamic viscosity is unwanted as the dynamic viscosity becomes too low for the intended use.
• the sterilization of a commercial mask composition leads the viscosity after sterilization to decrease: the compositions become more liquid.
• composition according to the invention comprising gum (s) , neutralized polyacrylic acid (s) , and polymer (s) comprising at least one monomer being acrylamido-2-methylpropanesulfonic acid, and C 2 -C 6 polyols overcome the above recited technical problems.
• the present invention also relates to cosmetic process for caring and/or making up a keratin material, comprising the application, to the surface of said keratin material, of at least one composition according to the present invention, wherein said keratin material is preferably skin, in particular face.
• the viscosity of the composition is measured.
• the viscosity of a composition of the invention may be measured via any process known to those skilled in the art, and especially according to the following conventional process.
• the measurement can be carried out at 25°C using a Rheomat 180 viscometer equipped with a spindle rotating at 200 rpm.
• Those skilled in the art may select the spindle for measuring the viscosity from the spindles M1, M2, M3 and M4 on the basis of their general knowledge, so as to be able to perform the measurement.
• stable upon sterilization we intend to mean that the composition of the present invention undergoes the sterilization process without an undesired huge decrease in viscosity. In particular, such a decrease is not acceptable when greater than 35%.
• keratin materials we intend to mean human keratin materials and more specifically skin.
• composition of the present invention comprises at least one gum.
• the gums that are suitable for the present invention are xanthan gum, gellan gum, guar gum and nonionic derivatives thereof (hydroxypropyl guar) , gum arabic, konjac gum or mannan gum, gum tragacanth, ghatti gum, karaya gum, locust bean gum, agar gum, scleroglucan gums and mixtures thereof.
• Examples that may be mentioned include the xanthan gum sold under the name CG-T by the company CP Kelco, gellan gum sold under the name CG LA by the company CP Kelco, guar gum sold under the name Jaguar HP by the company Rhodia; mannan gum and konjac (1%glucomannan) sold by the company GfN.
• the gum that is preferred in the present invention is xanthan gum.
• Xanthan gum is an anionic polysaccharide composed of a ⁇ - (1 ⁇ 4) -D-glucopyranose glucan backbone with side chains of (1 ⁇ 3) - ⁇ -D-mannopyranose- (2 ⁇ 1) - ⁇ -D-glucuronic acid- (4 ⁇ 1) - ⁇ -D-mannopyranose on alternating residues.
• Xanthan gum is designed by CAS number 11138-66-2.
• the gum is present in an amount ranging from 0.01%to 3%by weight, preferably from 0.05%to 1%by weight, more preferably from 0.1%to 0.5%by weight, relative to the total weight of the composition.
• composition of the present invention comprises at least one neutralized polyacrylic acid.
• Suitable neutralized polyacrylic acids for use in the present invention include, but are not limited to, salts of polyacrylic acid. These are anionic polyelectrolytes with negatively charged carboxylic groups in the main chain.
• Examples thereof include the sodium, potassium, lithium and ammonium neutralized salts of polyacrylic acid.
• the most preferred neutralized polyacrylic acid is sodium polyacrylate.
• said polyacrylate is sodium polyacrylate is designed by CAS number 9003-04-7.
• Sodium polyacrylate is for example marketed by Sigma-Aldrich, or COSMEDIA SP sold by the company BASF.
• the amount of neutralized polyacrylic acid may range, for example, from 0.01%to 3%by weight, preferably from 0.05%to 1%by weight, more preferably from 0.1%to 0.5%by weight, relative to the total weight of the composition.
• composition of the present invention comprises at least one polymer comprising at least one monomer being acrylamido-2-methylpropanesulfonic acid (or polymers) .
• the polymers in accordance with the invention are crosslinked or non-crosslinked homopolymers or copolymers comprising at least the acrylamido-2-methylpropanesulfonic acid monomer, in a form partially or totally neutralized with a mineral base other than ammonia, such as sodium hydroxide or potassium hydroxide.
• They are preferably totally neutralized or virtually totally neutralized, i.e. at least 90%neutralized.
• These polymers according to the invention may be crosslinked or non-crosslinked.
• the crosslinking agents may be chosen from the polyolefinically unsaturated compounds commonly used for the crossli nking of polymers obtained by free-radical polymerization.
• crosslinking agents include divinylbenzene, diallyl ether, dipropylene glycol diallyl ether, polyglycol diallyl ethers, triethylene glycol divinyl ether, hydroquino ne diallyl ether, ethylene glycol or tetraethylene glycol di (meth) acrylate, trimethylolpropane triacrylate, methylenebisacrylamide, methylenebismethacrylamide, triallylamine, triallyl cyanurate, diallyl maleate, tetraallylethylenediamine, tetraallyloxyethane, trimethylolpropane diallyl ether, allyl (meth) acrylate, allylic ethers of alcohols of the sugar series, or other allylic or vinyl ether
• the crosslinking agent is chosen from methylenebis-acrylamide, allyl methacrylate and trimethylolpropane triacrylate (TMPTA) .
• TMPTA trimethylolpropane triacrylate
• the degree of crosslinking generally ranges from 0.01 mol%to 10 mol%and more particularly from 0.2 mol%to 2 mol%relative to the polymer.
• the polymers in accordance with the invention are water-soluble or water-dispersible. In this case they are:
• copolymers obtained from and from one or more hydrophilic or hydrophobic ethylenically unsaturated monomers and, if they are crosslinked, one or more crosslinking agents such as those defined above.
• these copolymers comprise hydrophobic ethylenically unsaturated monomers, these monomers do not comprise a fatty chain and are preferably present in small amounts.
• fatty chain means any hydrocarbon-based chain containing at least 7 carbon atoms.
• water-soluble or water-dispersible means polymers which, when introduced into an aqueous phase at 25°C, to a mass concentration equal to 1%, make it possible to obtain a macroscopically homogeneous and transparent solution, i.e. a solution that has a maximum light transmittance value, at a wavelength equal to 500 nm, through a sample 1 cm thick, of at least 60%and preferably of at least 70%.
• the "homopolymers” according to the invention are preferably crosslinked and neutralized, and they may be obtained according to the preparation process comprising the following steps:
• the solution or dispersion of monomer obtained in (a) is neutralized with one or more mineral or organic bases, preferably ammonia NH 3 , in an amount making it possible to obtain a degree of neutralization of the sulfonic acid functions of the polymer ranging from 90%to 100%;
• a standard free-radical polymerization is performed in the presence of free-radical initiators at a temperature ranging from 10 to 150°C; the polymer precipitates in the solution or dispersion based on tert-butanol.
• the homopolymers according to the invention are preferably optionally crosslinked and/or neutralized 2-acrylamido-2-methylpropanesulfonic acid homopolymers, for instance the poly (2-acrylamido-2-methylpropanesulfonic acid) sold by the company Clariant under the name Hostacerin (CTFA name: ammonium polyacryldimethyltauramide) .
• CTFA name ammonium polyacryldimethyltauramide
• the water-soluble or water-dispersible AMPS copolymers according to the invention contain preferably water-soluble ethylenically unsaturated monomers, hydrophobic monomers or mixtures thereof.
• the water-soluble comonomers may be ionic or nonionic.
• ionic water-soluble comonomers examples that may be mentioned include the following compounds and the salts thereof:
• - R 1 is chosen from H, -CH 3 , -C 2 H 5 and -C 3 H 7
• R 2 is a linear or branched, saturated or unsaturated hydrocarbon-based radical containing from 1 to 6 carbon atoms, substituted with at least one sulfonic (-SO 3 -) and/or sulfate (-SO 4 -) and/or phosphate (-PO 4 H 2 -) group.
• nonionic water-soluble comonomers examples that may be mentioned include:
• N-vinyllactams comprising a cyclic alkyl group containing 4 to 9 carbon atoms, such as n-vinylpyrrolidone, N-butyrolactam and N-vinylcaprolactam,
• - R 15 is chosen from H, -CH 3 , -C 2 H 5 and -C 3 H 7
• R 16 is a linear or branched, saturated or unsaturated hydrocarbon-based radical containing from 1 to 6 carbons, optionally substituted with a halogen atom (iodine, bromine, chlorine or fluorine) ; a hydroxyl group (-OH) ; ether.
• fatty-chain-free hydrophobic comonomers examples that may be mentioned include:
• silicone derivatives which lead to silicone polymers after polymerization, such as methacryloxypropyltris (trimethylsiloxy) silane and silicone methacrylamides,
• - R 23 is chosen from H, -CH 3 , -C 2 H 5 and -C 3 H 7
• R 24 is a linear or branched, saturated or unsaturated hydrocarbon-based radical containing from 1 to 6 carbon atoms.
• the water-soluble or water-dispersible polymers of the invention preferably have a molar mass ranging from 50 000 g/mol to 10 000 000 g/mol, preferably from 80 000 g/mol to 8 000 000 g/mol and even more preferably from 100 000 g/mol to 7 000 000 g/mol.
• water-soluble or water-dispersible AMPS homopolymers in accordance with the invention include crosslinked or non-crosslinked polymers of sodium acrylamido-2-methylpropanesulfonate, such as the polymer used in the commercial product Simulgel TM 800 (CTFA name: Sodium Polyacryloyldimethyltaurate) .
• water-soluble or water-dispersible AMPS copolymers examples include:
• AMPS/sodium acrylate copolymer such as the copolymer used in the commercial product sold under the name Simulgel TM EG by the company SEPPIC (CTFA name: Acrylamide/Sodium Acryloyldimethyltaurate/Isohexadecane/Polysorbate-80) ;
• AMPS/hydroxyethyl acrylate copolymer such as the copolymer used in the commercial product sold under the name Simulgel TM NS by the company SEPPIC (CTFA name: Hydroxyethyl acrylate/Sodium Acryloyldimethyltaurate copolymer (and) Squalane (and) Polysorbate-60) .
• the preferred polymers are more particularly sodium acrylamido-2-methylpropanesulfonate homopolymers, such as the homopolymer used in the commercial product Sepigel TM 800, and /hydroxyethyl acrylate copolymers, such as the copolymer used in the commercial product sold under the name Simulgel NS.
• the polymer or copolymer will be used in powder form.
• the polymers derived from AMPS may further be those comprising:
• X + is a proton, an alkali metal cation, an alkaline-earth metal cation or an ammonium ion
• n and p independently of each other, denote a number of moles and ranges from 0 to 30 and preferably from 1 to 20, with the proviso that n + p is less than or equal to 30, preferably less than 25 and better still less than 20;
• R 1 denotes a hydrogen atom or a linear or branched C 1 -C 6 alkyl radical (preferably methyl) and
• R 3 denotes a linear or branched alkyl comprising m carbon atoms, with m ranging from 6 to 30 and preferably from 10 to 25.
• the polymers are obtained especially by free-radical polymerization in tert-butanol medium from which they precipitate. Using polymerization in tert-butanol, it is possible to obtain a size distribution of the polymer particles that is particularly favourable for its uses.
• the polymerization reaction may be performed at a temperature of between 0 and 150°C, preferably between 20 and 100°C, either at atmospheric pressure or under reduced pressure. It may also be performed under inert atmosphere, and preferably under nitrogen.
• the polymer is a copolymer of and of a C 16 -C 18 alcohol methacrylate comprising from 6 to 25 mol of oxyethylene groups, obtained from methacrylic acid or a methacrylic acid salt and from a C 16 -C 18 alcohol oxyethylenated with 6 to 25 mol of ethylene oxide.
• the polymer may also be a copolymer of and of a C 12 -C 14 alcohol methacrylate comprising from 6 to 25 mol of oxyethylene groups, obtained from methacrylic acid or a methacrylic acid salt and from a C 12 -C 14 alcohol oxyethylenated with 6 to 25 mol of ethylene oxide.
• the crosslinked copolymer obtained from 96.45 mol%of and 3.55 mol%of a C 16 -C 18 alcohol methacrylate comprising 25 oxyethylene groups (Genapol )
• the crosslinking agent is trimethylolpropane triacrylate
• the acrylamide/sodium 2-methyl-2- [ (1-oxo-2-propenyl) amino] -1-propanesulfonate copolymer such as Simulgel in the form of an emulsion containing polysorbate 80 as surfactant and containing isohexadecane as fatty phase, sold by the company SEPPIC, or alternatively Simulgel Simulgel and Simulgel sold by the same company.
• Simulgel is described especially in document FR 2 785 801. It is more specifically a reverse latex.
• the polyelectrolyte is 2-methyl-2- [ (1-oxo-2-propenyl) amino] -1-propanesulfonic acid partially or totally salified especially in sodium salt or ammonium salt form, to a proportion of from 30 mol%to 50 mol%in the mixture comprising the and an acrylamide, which is itself in a proportion of 50%to 70%.
• the preferred polymers derived from is the optionally crosslinked and/or neutralized 2-acrylamido-2-methylpropanesulfonic acid homopolymers, for instance the poly (2-acrylamido-2-methylpropanesulfonic acid) sold by the company Clariant under the name Hostacerin (CTFA name: ammonium polyacryldimethyltauramide) .
• CTFA name ammonium polyacryldimethyltauramide
• the amount of the polymer c) may range, for example, from 0.01%to 5%by weight, preferably from 0.1%to 1%by weight, relative to the total weight of the composition.
• the composition according to the present invention presents good properties both in terms of mildness as well as viscosity after sterilization process.
• the weight ratio of the gum (s) and the sum of neutralized polyacrylic acid and polymer (s) comprising at least one monomer being acrylamido-2-methylpropanesulfonic acid is preferably between 2 and 0.1, preferably between 1.5 and 0.2, more preferably between 1 to 0.4.
• composition of the present invention comprises at least one C 2 -C 6 polyol.
• the C 2 -C 6 polyols is selected from the group consisting of glycerin, glycols, or mixtures thereof.
• a C 2 -C 6 polyol it is meant a polyol comprising from 2 to 6 carbon atoms, and at least two hydroxyl groups.
• C 2 -C 6 glycols can be linear or branched.
• C 2 -C 6 glycols it can be cited propylene glycol, butylene glycol, pentylene glycol, dipropylene glycol, glycerin, or their mixtures.
• Glycerin also known as glycerol, is propane-1, 2, 3-triol and is designed by CAS number 56-81-5.
• a glycol is a vicinal diol, with two hydroxyl groups occupying vicinal positions.
• C 2 -C 6 glycols include 1, 2-ethanediol or ethylene glycol (designed by CAS number 107-21-1) or propane-1, 2-diol or alpha propylene glycol (designed by CAS number 57-55-6) , or 1, 2-butanediol (designed notably by CAS number 584-03-2) or 2, 3-butanediol (designed notably by CAS number 513-85-9) and any enantiomers thereof.
• the C 2 -C 6 polyol is chosen among propylene glycol, butylene glycol, glycerin, or their mixtures.
• the amount of C 2 -C 6 polyol is ranging from 0.001%to 30%by weight, preferably from 0.01%to 20%by weight, more preferably from 5%to 20%by weight, relative to the total weight of the composition.
• the composition of the present invention comprises, when exists, less than 0.3%by weight of total preservative compounds, relative to the total weight of the composition.
• the composition is essentially free of preservative compounds.
• “Essentially free of preservative compounds” means that the composition comprises no usual preservative compounds, such as parabens, or that the composition comprises ingredients which might be used as preservatives, however with the amount much lower than the effective amount known in the prior arts.
• the composition comprises at most 0.2%by weight, preferably at most 0.1%by weight, of preservative (s) , relative to the total weight of the composition.
• the composition of the invention is essentially free of preservative compounds selected from the group consisting of parabens, particularly alkyl parabens such as for example propyl p-hydroxybenzoate (propyl paraben) , methyl p-hydroxybenzoate (methyl paraben) , butyl p-hydroxybenzoate (butyl paraben) and phenoxyethanol.
• parabens particularly alkyl parabens such as for example propyl p-hydroxybenzoate (propyl paraben) , methyl p-hydroxybenzoate (methyl paraben) , butyl p-hydroxybenzoate (butyl paraben) and phenoxyethanol.
• the composition comprises no parabens. “No parabens” means that the amount of parabens is below the limit imposed by law or regulations to claim, for example on a packaging, this absence of parabens.
• the composition may additionally comprise one or more other topically acceptable ingredient.
• the composition may comprise at least one skin care agent and/or at least one cosmetically active ingredient.
• Cosmetically active ingredients may be for example selected from the group consisting of oils, humectants, surfactants, structuring agents, sunscreens, film formers, acidifying and/or alkalizing agents, buffering agents, chelating agents, coloring additives, dermatologically active agents, whitening active ingredients, others skin care agents, cosmetically active ingredients, and any combination thereof.
• the skin care agent and/or cosmetically active ingredient is selected from the group consisting of whitening agents, anti-oxidants, cleansing agents, free radical scavengers, moisturizers, skin tone altering agents, anti-acne agents, anti-aging agents, anti-wrinkle agents, anti-inflammatory agents, skin texture treatment agents, anti-perspirant agents, aesthetics, anti-bacterial agents, nourishing agents, sebum and/or moisture absorbers and any combination thereof.
• the amount of active ingredient (s) ranges from 0.0001 to 10%, preferably from 0.001 to 10%, and more preferably from 0.01 to 5%by weight relative to the total weight of the composition.
• the amount of active ingredient (s) is from 0.1%to 5%by weight relative to the total weight of the composition.
• composition according to the invention comprises an aqueous phase.
• the aqueous phase of the present invention comprises water.
• the aqueous phase may also comprise water-miscible organic solvents (at room temperature of 20-25°C) , for instance polyols other than the C 2 -C 6 polyols as claimed in the present invention; glycol ethers (especially containing from 3 to 16 carbon atoms) such as mono-, di-or tripropylene glycol (C 1 -C 4 ) alkyl ethers, mono-, di-or triethylene glycol (C 1 -C 4 ) alkyl ethers, and mixtures thereof.
• water-miscible organic solvents at room temperature of 20-25°C
• polyols other than the C 2 -C 6 polyols as claimed in the present invention
• glycol ethers especially containing from 3 to 16 carbon atoms
• mono-, di-or tripropylene glycol (C 1 -C 4 ) alkyl ethers mono-, di-or triethylene glycol (C 1 -C 4 ) alkyl ethers, and mixture
• the amount of aqueous phase may range, for example, from 0.1%to 99.9%by weight, preferably from 0.5%to 99%by weight relative to the total weight of the composition.
• the amount of water in the compositions according to the invention ranges from 20%to 95%by weight, preferably from 30%to 90%by weight, more preferably from 50%to 85%by weight, relative to the total weight of the composition.
• the cosmetic composition of the present invention may further comprise at least one additive.
• a person skilled in the art can adjust the type and amount of additives present in the compositions according to the invention by means of routine operations, so that the desired cosmetic properties and stability properties for these compositions are not affected by the additives.
• Said additive may be chosen from thickeners, colorants and preservatives, and so on.
• compositions according to the present invention may also comprise conventional cosmetic additives soluble in the aqueous phase of the composition of the invention chosen in particular organic solvents, ionic or nonionic thickeners, softeners, humectants, additional opacifiers, stabilizers, emollients, silicones, antifoams, fragrances, anionic, cationic, nonionic, zwitterionic or amphoteric surfactants, active agents, fillers, polymers, propellants, acidifying or basifying agents or any other ingredient commonly used in the cosmetic and/or dermatological field.
• conventional cosmetic additives soluble in the aqueous phase of the composition of the invention chosen in particular organic solvents, ionic or nonionic thickeners, softeners, humectants, additional opacifiers, stabilizers, emollients, silicones, antifoams, fragrances, anionic, cationic, nonionic, zwitterionic or amphoteric surfactants, active
• the aqueous phase may also contain additives such as water-soluble active ingredients, salts, gelling agents, fillers, water-soluble or water-dispersible polymers, water-soluble dyes, and any mixture thereof.
• additives such as water-soluble active ingredients, salts, gelling agents, fillers, water-soluble or water-dispersible polymers, water-soluble dyes, and any mixture thereof.
• the composition of the present invention is an aqueous solution.
• the present invention relates to a composition, in particular a cosmetic or dermatological composition, in the form of an aqueous composition.
• the present invention relates in particular to a mask, in particular a cosmetic or dermatological mask, essentially free of preservative, and in particular free of paraben.
• the invention relates to a cosmetic composition for caring for keratin materials, in particular the skin, comprising a composition as described in the present invention, and at least a substrate.
• the substrate is conventionally known as tissue masks for caring for the skin. There is no limit to the type of the substrate that can be used in the composition of the present invention.
• the present invention relates to a cosmetic composition, in particular a mask for caring for keratin materials, in particular skin, comprising, in an aqueous phase, xanthan gum, sodium polyacrylates, greater than or equal to 0.1%by weight, relative to the total weight of the composition, of a polymer comprising at least one monomer of 2-acrylamido-2-methylpropanesulfonic acid, and at least one C 2 -C 6 polyols.
• the composition of the present invention has a viscosity from 100 mPa ⁇ s to 500 mPa ⁇ s, more preferably from 200 mPa ⁇ s to 400 mPa ⁇ s, before the sterilization process.
• the composition of the present invention has a viscosity of from 120 mPa ⁇ s to 500 mPa ⁇ s, preferably from 200 mPa ⁇ s to 400 mPa ⁇ s, after the sterilization process.
• the viscosity of a composition of the invention may be measured via the process as described above.
• the viscosity of the composition according to the invention is measured at 25°C, using a ProRheo R180 viscometer equipped with a spindle M2 rotating at 200 rpm from the company Prorheo.
• Viscosity (mPa ⁇ s) 10.6*UD (this equation just applied to M2 spindle)
• composition of the present invention is stable upon sterilization.
• the composition undergoes sterilization process without an unacceptable decrease in viscosity.
• such a decrease is less than or equal to 35%, preferably less than or equal to 30%, more particular less than or equal to 20%.
• %viscosity decrease (viscosity before sterilization –viscosity after sterilization) / viscosity before sterilization ⁇ 100%
• composition of the invention is to allow the possibility to sterilize the composition without negatively affecting the stability of the composition.
• Sterilization refers in particular to any process that eliminates, removes, kills, or deactivates from a composition microorganisms and pathogens (including viruses) .
• sterilization is selected from the group consisting of heat sterilization, chemical sterilization, irradiation sterilization, pressure sterilization, and filtration sterilization.
• Heat sterilization includes notably steam, dry heat, flaming, incineration, tyndallization, sterilization with glass beads.
• Chemical sterilization includes notably sterilization with Ethylene oxide, Nitrogen dioxide, Ozone, Glutaraldehyde and formaldehyde, Hydrogen peroxide, Peracetic acid.
• Radiation sterilization includes notably Non-ionizing radiation sterilization and Ionizing radiation sterilization.
• heat sterilization is steam sterilization.
• a widely used method for heat sterilization is the autoclave, generally called steam sterilizer.
• the composition to be sterilized is placed in an autoclave which is heated to a temperature in the range 121-34°C under pressure in the presence of steam (water steam) .
• steam sterilization requires heat treatment at above 121°C for several minutes, typically for at least 15 minutes.
• the present invention relates to composition obtainable according to such a sterilization process.
• compositions of the prior art cannot tolerate heat sterilization, especially in autoclave. Upon heat sterilization in autoclave the prior art compositions become very liquid (the dynamic viscosity diminishes significantly) .
• composition according to the invention may be applied by any means enabling a uniform distribution, in particular using a finger, or a cotton ball, a rod, a brush, gauze, a spatula, or by spraying, and can be removed by rinsing with water or using a gentle detergent.
• the composition after application on skin, forms a mask when topically applied, especially after application on human skin.
• the mask forms a film or sheet.
• the composition forms a skin mask.
• the composition forms a face mask.
• the composition forms a film or sheet.
• the composition forms a leave on mask.
• the composition is used to prepare a solid applicator body.
• composition of the invention may be implemented so as to improve the general state of the epidermis, in particular the skin.
• composition of the present invention can be used for a cosmetic process, such as a cosmetic process or method, for making up/caring for the keratin materials, such as the skin, in particular the face and the lips, by being applied to the skin, especially the face.
• a cosmetic process such as a cosmetic process or method
• the keratin materials such as the skin, in particular the face and the lips
• the present invention also relates to a use of the composition according to the present invention, for making up/caring for the skin, especially for the face.
• composition of the invention is a skin mask providing a skin benefit.
• the composition limits the skin sensitivity.
• the composition has better skin finish in terms of reflection, softness, plump.
• the composition of the invention has a better consumer appreciation than prior art compositions.
• composition of the present invention is stable over time.
• “Stable over time” is understood to mean compositions of the present invention which, after storage at all temperatures between 4°C and 45°C for 2 months, do not exhibit any macroscopic change in color, smell or viscosity, any variation in pH or any variation in microscopic appearance.
• Comparative formulas B to D do not comprise one of the ingredients a) to c) , respectively.
• phase B into phase A under 80°C, homogenize until uniform;
• the invention and comparative formulas were then applied on the facial skin of 5 consumers as a leave on mask product with a conventionally available tissue substrate sold by the company FJNF Co., Ltd., respectively (28 g per tissue substrate) .
• the skin feelings after application as well as the cosmetic properties were evaluated by the consumers.
• the invention formula A provides to the skin a very good mildness feeling after application as a leave on tissue mask, and a very hydrating and moisturizing feeling is perceived by the consumers.

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• 2016
  • 2016-12-09 WO PCT/CN2016/109173 patent/WO2018103066A1/en active Application Filing
  • 2016-12-09 CN CN201680091483.8A patent/CN110573130B/zh active Active

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