Compositions in the form of oil-in-water emulsions

Abstract

An oil-in-water emulsion composition comprising: (ii) at least 2% by weight of at least one C14-C30 fatty alcohol relative to the total weight of the composition; (iii) at least one anionic surfactant selected from sulfonates and sulfates; (iv) at least one hydrophilic acrylic homopolymer; and (v) at least one amphiphilic acrylic copolymer. A non-therapeutic method for use with keratin materials for care and / or cosmetic purposes.

Description

Technical Field

[0001] This invention relates to a cosmetic composition. In particular, it relates to a composition in the form of an oil-in-water emulsion. Furthermore, the invention also relates to a non-therapeutic method for using keratin materials in skincare and / or cosmetic applications. Background Technology

[0002] The development of formulations specifically for the care and / or cosmetic purposes of skin and / or lips has been ongoing. Such formulations must exhibit satisfactory properties in terms of application (e.g., ease of use) and sensory aspects (e.g., post-application hydration and / or moisturizing, refreshing sensation).

[0003] A wide variety of cosmetic compositions have been used to care for the skin, particularly to provide moisture or hydration. These compositions typically contain lipophilic emollients, which inhibit water loss through occlusion. For example, efforts have been made to formulate compositions in cream or lotion form. Thanks to the thick texture of these compositions, a moisturizing sensation can be provided to the skin through occlusion.

[0004] However, these product types are still unsatisfactory.

[0005] Consumers experienced an unpleasant greasy feeling after applying the product. Furthermore, due to its thick texture, it was difficult to apply evenly to the skin, and the texture change was not ideal.

[0006] Therefore, it remains necessary to formulate stable compositions for skin care that have a non-greasy feel and good texture in terms of consistency, shear thinning, and smoothness. The composition is expected to spread easily on the skin during application.

[0007] Therefore, it is desirable to provide stable compositions, preferably for use as keratin materials in care and / or cosmetic applications, which exhibit excellent texture and sensory properties. Summary of the Invention

[0008] The inventors have now discovered that such compositions can be formulated to have the desired properties as described above.

[0009] Specifically, the inventors have discovered that stable compositions can be formulated, preferably for use in care and / or cosmetic keratin materials, which exhibit excellent texture in terms of consistency, shear thinning and smoothness, and non-greasy feel.

[0010] Therefore, in a first aspect, the present invention relates to a composition in the form of an oil-in-water emulsion, preferably used for care and / or cosmetic keratin materials, the composition comprising: (i) More than 2% by weight of at least one C14-C30 fatty alcohol relative to the total weight of the composition; (ii) at least one anionic surfactant selected from sulfonates and sulfates; (iii) at least one hydrophilic acrylic polymer; and (iv) At least one amphiphilic acrylic copolymer.

[0011] The composition of the present invention is in the form of an oil-in-water emulsion. Therefore, the composition comprises a continuous aqueous phase and a dispersed oil phase.

[0012] In a second aspect, the present invention relates to a non-therapeutic method for using keratin materials for care and / or cosmetic purposes, comprising applying a composition according to the invention to the keratin material.

[0013] The compositions of the present invention are easy to apply evenly to the skin without the need for prolonged finger massage.

[0014] The compositions of the present invention exhibit excellent consistency, shear thinning and smoothness during application, as well as a non-greasy feel.

[0015] The compositions of the present invention are stable, i.e., no phase separation and particles were observed after storage for 2 months under all conditions of 4°C, room temperature (20°C) and 45°C.

[0016] Other features and advantages of the present invention will become clearer upon reading the following description and embodiments. Detailed Implementation

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Where the definitions of terms in this specification conflict with the meanings commonly understood by one of ordinary skill in the art to which this invention pertains, the definitions set forth herein shall prevail.

[0018] In the following text and unless otherwise specified, the limits of the numerical range are included within the range, particularly in the expressions “between … and …” and “… to …”.

[0019] Furthermore, the expression "at least one / kind" used in this specification is equivalent to the expression "one / kind or more / kinds".

[0020] Throughout this application, the term "comprising / including / containing" should be interpreted as encompassing all specifically mentioned features as well as optional, additional, or unspecified features. As used herein, the use of the term "comprising / including / containing" also discloses embodiments in which features other than those specifically mentioned (i.e., "composed of") are absent.

[0021] Unless otherwise stated, all numerical values, such as those representing quantities of ingredients, used in the specification and claims should be understood to be modified by the term "about". Therefore, unless otherwise indicated, the numerical values ​​and parameters described herein are approximate and can be changed as needed for desired purposes.

[0022] As used herein, the term "keratin material" refers to skin and lips. By "skin," we intend to mean all body skin, including the scalp. Preferably, keratin material refers to facial skin.

[0023] Unless otherwise stated, all percentages in this invention refer to weight percentages.

[0024] The composition according to the present invention comprises: (i) More than 2% by weight of at least one C14-C30 fatty alcohol relative to the total weight of the composition; (ii) at least one anionic surfactant selected from sulfonates and sulfates; (iii) at least one hydrophilic acrylic polymer; and (iv) At least one amphiphilic acrylic copolymer.

[0025] C14-C30 fatty alcohols According to a first aspect, the composition contains more than 2% by weight of at least one C14-C30 fatty alcohol relative to the total weight of the composition of the invention.

[0026] The term "fatty alcohol" refers to any alcohol having the structure R-OH, where R represents a straight-chain, saturated or unsaturated hydrocarbon-based chain.

[0027] The term "hydrocarbon-based chain" refers to an organic group that is mainly composed of hydrogen and carbon atoms.

[0028] The fatty alcohols present in the compositions according to the invention comprise hydrocarbon-based chains containing 14 to 30 carbon atoms.

[0029] Preferably, the C14-C30 fatty alcohol comprises a hydrocarbon-based chain, which is a straight-chain alkyl or alkenyl group containing 14 to 30 carbon atoms; more preferably, the C14-C30 fatty alcohol comprises a hydrocarbon-based chain, which is a straight-chain alkyl or alkenyl group containing 14 to 22 carbon atoms.

[0030] One or more C14-C30 fatty alcohols suitable for the compositions of the present invention are, for example, myristol (1-tetradecanool), cetyl alcohol (1-hexadecanool), palmitol (cis-9-hexadecene-1-ol), cetearyl alcohol, stearyl alcohol (1-octadecanool), arachidyl alcohol (1-eicosyl alcohol), betel nut alcohol (1-docosahexadecanool), senna alcohol (cis-13-docosahexadecene-1-ol), lignoceryl alcohol (1-tetradecanool), lignoceryl alcohol (1-hexadecanool), beeswax alcohol, and beeswax alcohol (1-triacontanol).

[0031] Preferably, the C14-C30 fatty alcohols are selected from cetyl alcohol (1-hexadecyl alcohol), stearyl alcohol (1-octadecyl alcohol), cetearyl alcohol, arachidyl alcohol (1-eicosyl alcohol), betaine alcohol (1-docosahexadecyl alcohol), and mixtures thereof.

[0032] More preferably, the C14-C30 fatty alcohols are selected from cetyl alcohol (1-hexadecyl alcohol), stearyl alcohol (1-octadecyl alcohol), cetearyl alcohol, betaine alcohol (1-dococosanol), and mixtures thereof.

[0033] Preferably, the composition contains at least one C14-C20 fatty alcohol in an amount greater than 25% by weight relative to the total weight of C14-C30 fatty alcohols. The inventors have discovered that the composition exhibits excellent shear robustness when it contains at least one C14-C20 fatty alcohol in an amount greater than 25% by weight relative to the total weight of C14-C30 fatty alcohols.

[0034] In some embodiments, the compositions of the present invention comprise cetearyl alcohol.

[0035] In some embodiments, the compositions of the present invention comprise arachidonic acid and betaine alcohol, wherein the weight ratio of arachidonic acid to betaine alcohol is greater than 0.5.

[0036] Advantageously, C14-C30 fatty alcohols are present in the composition in an amount of 2.5% to 30% by weight, preferably 3% to 10% by weight, and more preferably 3.5% to 8% by weight, relative to the total weight of the composition according to the invention.

[0037] Anionic acid surfactants According to a first aspect, the compositions of the present invention comprise at least one anionic surfactant selected from sulfonates and sulfates.

[0038] It should be understood in this specification that: - Sulfonate anionic surfactants contain at least one sulfonate functional group (-SO3H or -SO3) - ), and may optionally also contain one or more sulfate functional groups, but not any carboxylate functional groups; and - Sulfate anionic surfactants contain at least one sulfate functional group (-OSO3H or -OSO3). - (but does not contain any carboxylate or sulfonate functional groups).

[0039] Preferably, the anionic surfactant is selected from fatty acid amide sulfonates and alkyl sulfates.

[0040] More preferably, the fatty acid amide sulfonates are selected from those of formula (I): in: R1 is a straight-chain or branched alkyl or alkenyl chain having 7 to 21 carbon atoms. R2 is H or methyl. R3 is H, COO - M + CH2COO - M + Or COOH, n is between 0 and 2, and M is selected from sodium, potassium, and ammonium.

[0041] Preferably, the fatty acid amide sulfonate is selected from taurine.

[0042] Preferred taurine salts are those according to formula (II). in R1 is a straight-chain or branched alkyl or alkenyl chain having 7 to 21 carbon atoms, preferably 12 to 19 carbon atoms. R2 is H or methyl, and M represents sodium or potassium.

[0043] Suitable examples of taurates include potassium cocoyl taurate, potassium methyl cocoyl taurate, sodium hexanoyl methyl taurate, sodium cocoyl taurate, sodium lauroyl taurate, sodium methyl cocoyl taurate, sodium methyl lauroyl taurate, sodium methyl myristoyl taurate, sodium methyl oleoyl taurate, sodium methyl palmitoyl taurate, sodium methyl stearyl taurate, and mixtures thereof.

[0044] Preferred are potassium cocoyl taurate, potassium methyl cocoyl taurate, sodium cocoyl taurate, sodium lauroyl taurate, sodium methyl cocoyl taurate, sodium methyl lauroyl taurate, sodium methyl myristoyl taurate, sodium methyl oleoyl taurate, sodium methyl palmitoyl taurate, and sodium methyl stearyl taurate, and mixtures thereof.

[0045] Preferably, the alkyl sulfate is selected from C12-C24 alkyl sulfates, especially C12-C20 alkyl sulfates, particularly in the form of alkali metal or alkaline earth metal salts, ammonium salts or amino alkoxides, such as sodium or potassium salts, ammonium salts, amine salts and especially amino alkoxides, and alkaline earth metal salts, such as magnesium salts.

[0046] Examples of amino alkoxides that may be mentioned include monoethanolamine, diethanolamine and triethanolamine salts, monoisopropanolamine, diisopropanolamine or triisopropanolamine salts, 2-amino-2-methyl-1-propanol salts, 2-amino-2-methyl-1,3-propanediol salts and tris(hydroxymethyl)aminomethane salts.

[0047] Alkali metal salts or alkaline earth metal salts are preferred, especially sodium or magnesium salts.

[0048] In some preferred embodiments, the composition comprises at least one C12-C20 alkyl sodium sulfate as an anionic surfactant.

[0049] According to some particularly preferred embodiments of the present invention, the anionic surfactant is sodium methylstearoyl taurate, sodium cetearyl sulfate, and mixtures thereof.

[0050] Advantageously, the anionic surfactant is present in the composition in an amount of 0.1% to 10% by weight, preferably 0.2% to 5% by weight, and more preferably 0.4% to 2% by weight, relative to the total weight of the composition according to the invention.

[0051] hydrophilic acrylic polymers According to a first aspect, the cosmetic composition of the present invention comprises at least one hydrophilic acrylic polymer.

[0052] As used herein, the term "hydrophilic acrylic polymer" specifically refers to non-hydrophobic and non-amphiphilic acrylic polymers.

[0053] The hydrophilic acrylic polymers that can be used according to the present invention include polymers of acrylic acid or methacrylic acid or ethylacrylic acid or their salts or esters, such as polymers of acryloyl dimethyl taurate, preferably ammonium polyacryloyl dimethyl taurate sold by Clariant under the name Hostacerin AMPS, or ammonium acryloyl dimethyl taurate / VP copolymer sold by Clariant under the name Aristoflex AVC.

[0054] Preferably, the hydrophilic acrylic polymer is a crosslinked homopolymer of acrylic acid or methacrylic acid. The crosslinking agent used in the crosslinked homopolymer of acrylic acid or methacrylic acid is selected from allyl ethers of pentaerythritol, allyl ethers of sucrose, or allyl ethers of propylene.

[0055] Commercial examples of crosslinked homopolymers of acrylic acid or methacrylic acid include, for example, carbomers, such as those sold by LUBRIZOL under the names CARBOPOL® 940, CARBOPOL® 941, CARBOPOL® 980, and CARBOPOL® 981, those sold by COREL PHARMA CHEM under the name ACRYPOL® 980, and those sold by 3V under the name SYNTHALEN® K.

[0056] For the purposes of this invention, the preferred hydrophilic acrylic polymer is carbomer.

[0057] The inventors unexpectedly discovered that introducing a hydrophilic acrylic polymer as defined into a combination of at least one C14-C30 fatty alcohol, at least one anionic surfactant selected from sulfonates, and at least one amphiphilic acrylic copolymer results in a system with good smoothness and no particles.

[0058] Advantageously, the hydrophilic acrylic polymer is present in the composition in an amount of 0.01% to 10% by weight, preferably 0.1% to 5% by weight, and more preferably 0.2% to 2% by weight, relative to the total weight of the composition according to the invention.

[0059] Amphiphilic acrylic copolymers According to a first aspect, the composition of the present invention comprises at least one amphiphilic acrylic copolymer.

[0060] These copolymers contain a hydrophilic portion and a hydrophobic portion containing at least one fatty chain. Therefore, they are amphiphilic copolymers.

[0061] The fatty chains of such polymers can contain 7 to 30 carbon atoms, and more particularly 8 to 22 carbon atoms.

[0062] Preferably, the acrylic copolymer is an amphiphilic copolymer derived from 2-acrylamido-2-methylpropanesulfonic acid (AMPS), also known as AMPS. ® Copolymer.

[0063] AMPS according to the present invention ® Copolymers can be cross-linked or non-cross-linked.

[0064] Among the crosslinking agents suitable for use, methylenebisacrylamide, allyl methacrylate, and trimethylolpropane triacrylate (TMPTA) may be mentioned in a non-limiting manner.

[0065] For copolymers, the degree of crosslinking can be from 0.01 mol% to 10 mol%, and particularly from 0.2 mol% to 2 mol%.

[0066] These copolymers may also contain other olefinically unsaturated hydrophilic monomers selected from, for example, acrylic acid, methacrylic acid or their alkyl-substituted derivatives or their esters obtained with monoalkylene glycols or polyalkylene glycols, acrylamide, methacrylamide, vinylpyrrolidone, itaconic acid and maleic acid or mixtures thereof.

[0067] The amphiphilic acrylic copolymers suitable for use in this invention can be selected from AMPS. ® An amphiphilic copolymer with at least one olefinic unsaturated monomer comprising at least one hydrophobic portion containing 7 to 30 carbon atoms, particularly 8 to 22 carbon atoms.

[0068] The hydrophobic portion can be a saturated or unsaturated straight-chain (e.g., n-octyl, n-decyl, n-hexadecyl, n-dodecyl, or oleylene), branched (e.g., isostearyl), or cyclic (e.g., cyclododecane or adamantane) alkyl group.

[0069] The olefinically unsaturated hydrophobic monomers suitable for use in this invention can be selected from acrylates or acrylamides of the following formula (A): in: R 27 Represents a hydrogen atom or a straight-chain or branched C1-C6 alkyl group (preferably methyl). Y represents O or NH; R 28 It indicates a hydrophobic group containing an aliphatic chain with 7 to 30 carbon atoms, preferably 8 to 22 carbon atoms.

[0070] Hydrophobic group R 28 Selected from saturated or unsaturated straight-chain C7-C 30 Alkyl (e.g., n-octyl, n-decyl, n-hexadecyl, n-dodecyl, or oleylene), branched alkyl (e.g., isostearyl), or cyclic alkyl (e.g., cyclododecane or adamantane).

[0071] Among these groups, straight-chain and branched alkyl groups are particularly preferred.

[0072] According to one embodiment of the present invention, the hydrophobic group R 28 It may also contain at least one epoxide unit, and in particular a polyoxyalkylene chain.

[0073] Polyoxyolefin chains can be formed from ethylene oxide units and / or propylene oxide units, and even more particularly from only ethylene oxide units.

[0074] The number of moles of olefin oxide units can typically be from 1 to 30 moles, more particularly from 3 to 25 moles, and even more particularly from 5 to 25 moles.

[0075] The amphiphilic copolymers according to the invention can be partially or completely neutralized with mineral bases (sodium hydroxide, potassium hydroxide or ammonia) or organic bases (e.g. monoethanolamine, diethanolamine, triethanolamine, aminomethylpropylene glycol, N-methylglucosamine, basic amino acids, such as arginine and lysine) and mixtures of these compounds.

[0076] In AMPS applicable to the present invention ® Amphiphilic copolymers may refer to crosslinked or non-crosslinked, neutralized or unneutralized copolymers that, relative to the polymer, contain 15% to 60% by weight of AMPS units and 40% to 85% by weight of (C8-C) copolymers. 20 )alkyl (meth)acrylamide unit or (meth)acrylic acid (C8-C 20 Alkyl ester units, such as those described in patent application EP-A-0 750 899.

[0077] As an amphiphilic copolymer suitable for the present invention, AMPS can be mentioned. ® The copolymer of alkyl methacrylate with polyoxyethylene (crosslinked or non-crosslinked) copolymer and mixtures thereof, wherein the number of moles of ethylene oxide units is 1 to 30 moles, preferably 3 to 25 moles, and more preferably 5 to 25 moles.

[0078] As an amphiphilic copolymer suitable for use in this invention, fully neutralized AMPS may also be mentioned. ® Copolymers of n-dodecyl methacrylate, n-hexadecyl methacrylate and / or n-octadecyl methacrylate, and copolymers of AMPS with n-dodecylmethacrylamide, may be crosslinked or non-crosslinked.

[0079] It may also be mentioned that crosslinked or non-crosslinked amphiphilic copolymers comprise or are formed from the following: 2-Acrylamido-2-methylpropanesulfonic acid (AMPS) of formula (B) ® )unit: Where X can be a proton, an alkali metal cation, an alkaline earth metal cation, or an ammonium ion; And the unit of the following formula (C): in: n and p represent the number of moles independently and range from 0 to 30, especially from 1 to 25, and even more especially from 3 to 25, provided that n + p is less than or equal to 30. R 27 It has the same meaning as shown in the aforementioned equation (A), and R29 It indicates that it contains 7 to 22 straight-chain or branched alkyl groups.

[0080] In formula (B), cation X can more specifically represent sodium or ammonium.

[0081] It is worth mentioning that: Non-crosslinked amphiphilic copolymers, wherein p = 0, n = 7 or 25, R 27 Indicates methyl and R 29 Indicates C18 alkyl or a mixture of C16 alkyl and C18 alkyl, and Crosslinked amphiphilic copolymers, wherein p = 0, n = 8 or 25, R 27 Indicates methyl and R 29 This indicates a C18 alkyl group or a mixture of C16 alkyl and C18 alkyl groups.

[0082] These copolymers are described and synthesized in document EP 1 069 142.

[0083] In the amphiphilic polymers according to the invention, the molar percentage concentrations of units of formula (B) and formula (C) can vary depending on the desired cosmetic application, the nature of the emulsion (oil-in-water or water-in-oil emulsion), and the rheological properties of the desired formulation.

[0084] Its range can be between 0.1 mol% and 99.9 mol%.

[0085] In the amphiphilic polymer according to the invention, the molar proportion of the unit of formula (B) is preferably from 0.1% to 50%, more particularly from 1% to 25%, and even more particularly from 3% to 10%.

[0086] In the amphiphilic polymer according to the invention, the molar proportion of the unit of formula (C) can preferably be from 50.1% to 99.9%, more particularly from 60% to 95%, and even more particularly from 65% to 90%.

[0087] The distribution of monomers in the polymers of the present invention can be, for example, alternating, block (including multiblock) or random.

[0088] As a guideline, and without limitation, the following business reference may be mentioned: Aristoflex sold by Clariant. ® HMS and Aristoflex ® HMB, these two references are related to cross-linked polymers.

[0089] Aristoflex ® HMS is AMPS ®The name of / ethoxylated (25 EO) cetearyl alcohol methacrylate copolymer 80 / 20 (which is crosslinked with trimethylolpropane triacrylate (TMPTA)) or INCI name is acryloyl dimethyl taurate ammonium / stearyl alcohol polyether-25 methacrylate crosslinked polymer.

[0090] As an INCI name, Aristoflex ® HMB is a cross-linked polymer of ammonium acryloyl dimethyl taurate / sobenol polyether-25 methacrylate.

[0091] According to a preferred embodiment, the composition of the present invention comprises at least one optionally crosslinked and / or neutralized copolymer of AMPS and alkyl polyoxyethylene methacrylate, wherein the alkyl group contains 7 to 30 carbon atoms, particularly 8 to 22 carbon atoms, and the number of moles of ethylene oxide units is 1 to 30 moles, preferably 3 to 25 moles, and more preferably 5 to 25 moles.

[0092] According to a preferred embodiment, the composition of the present invention comprises at least one amphiphilic acrylic copolymer selected from ammonium acryloyl dimethyl taurate / sobyl alcohol polyether-25 methacrylate crosspolymer, ammonium acryloyl dimethyl taurate / stearyl alcohol polyether-25 methacrylate crosspolymer, and combinations thereof.

[0093] According to a more preferred embodiment, the composition of the present invention comprises an ammonium acryloyl dimethyl taurate / stearyl alcohol polyether-25 methacrylate crosspolymer.

[0094] The inventors unexpectedly discovered that introducing an amphiphilic acrylic copolymer into a combination of at least one C14-C30 fatty alcohol, at least one anionic surfactant selected from sulfonates, and at least one hydrophilic acrylic polymer results in a system with suitable consistency that can produce a non-greasy film on keratin materials.

[0095] Advantageously, the amphiphilic acrylic copolymer is present in the composition in an amount of 0.1% to 5% by weight, preferably 0.2% to 5% by weight, and more preferably 0.4% to 2% by weight, relative to the total weight of the composition according to the invention.

[0096] Aqueous phase As an oil-in-water emulsion, the composition of the present invention comprises a continuous aqueous phase.

[0097] The aqueous phase is preferably present in an amount of 10% to 90% by weight, more preferably 20% to 85% by weight, relative to the total weight of the composition.

[0098] The continuous aqueous phase may contain water, at least one water-miscible organic solvent, or a mixture thereof.

[0099] Water is preferably present in the composition in an amount of 10% to 85% by weight, more preferably 20% to 80% by weight, relative to the total weight of the composition of the present invention.

[0100] Preferably, the continuous hydrophilic phase comprises at least one organic solvent miscible with water (at room temperature 25°C), such as a monohydric alcohol having 2 to 6 carbon atoms, such as ethanol or isopropanol; a polyhydric alcohol having 2 to 20 carbon atoms, preferably 2 to 10 carbon atoms, and more preferably 2 to 6 carbon atoms, such as glycerol, propylene glycol, butanediol, pentanediol, hexanediol, octyl glycol, dipropylene glycol, or diethylene glycol; and glycol ethers (especially having 3 to 16 carbon atoms), such as monopropylene glycol (C1-C4) alkyl ethers, dipropylene glycol (C1-C4) alkyl ethers or tripropylene glycol (C1-C4) alkyl ethers, monoethylene glycol (C1-C4) alkyl ethers, diethylene glycol (C1-C4) alkyl ethers or triethylene glycol (C1-C4) alkyl ethers and mixtures thereof.

[0101] In some embodiments, the continuous hydrophilic phase of the composition of the present invention may comprise water and a polyol, preferably glycerol.

[0102] The organic solvent is preferably present in the composition in an amount of 1% to 30% by weight, more preferably 5% to 20% by weight, relative to the total weight of the composition of the present invention.

[0103] In some embodiments, the composition comprises 20% to 80% by weight of water and 5% to 20% by weight of glycerol relative to the total weight of the composition of the invention.

[0104] oil phase As an oil-in-water emulsion, the composition of the present invention further comprises a dispersed oil phase.

[0105] The oil phase contains at least one oil, especially cosmetic oil. It may also contain other fatty substances.

[0106] The term "oil" refers to a non-aqueous compound that is liquid at room temperature (20°C) and atmospheric pressure (760 mmHg) and is immiscible with water.

[0107] Oils can be volatile or non-volatile.

[0108] The term "non-volatile" refers to a vapor pressure that is non-zero and less than 10 at room temperature and atmospheric pressure. -3 Oil with a pressure of mmHg (0.13 Pa).

[0109] The term "volatile oil" refers to any oil that, at room temperature and atmospheric pressure, is able to evaporate in less than an hour after contact with the skin.

[0110] The oil phase may contain hydrocarbon-based oils, silicone oils, or mixtures thereof.

[0111] They can be of animal, plant, mineral, or synthetic origin.

[0112] The term "hydrocarbon-based oil" refers to oil that primarily contains hydrogen and carbon atoms.

[0113] For the purposes of this invention, the preferred hydrocarbon-based oil is lauroyl sarcosine isopropyl ester.

[0114] The term "silicone oil" refers to an oil containing at least one silicon atom, and in particular at least one Si-O group.

[0115] Oils may optionally contain oxygen, nitrogen, sulfur and / or phosphorus atoms, for example in the form of hydroxyl or acid groups.

[0116] Advantageously, the oil phase is present in the composition of the invention in an amount of 1% to 30% by weight, preferably 5% to 20% by weight, relative to the total weight of the composition of the invention.

[0117] Cosmetic active ingredients As a composition for caring for keratin materials, the composition of the present invention may contain cosmetic active ingredients.

[0118] Examples of active ingredients in cosmetics may include emollients; vitamins such as vitamin A (retinol), vitamin E (tocopherol), vitamin C (ascorbic acid), vitamin B5 (panthenol), and derivatives (especially esters) of said vitamins and mixtures thereof; whitening agents; firming agents; exfoliating agents; repairing and soothing agents; anti-aging agents; agents that act on microcirculation, and mixtures thereof.

[0119] Those skilled in the art can readily adjust the amount of cosmetic active ingredients based on the end use of the compositions according to the invention.

[0120] Other adjuvants or additives The cosmetic compositions of the present invention may also contain conventional cosmetic adjuvants or additives, such as fragrances, chelating agents, preservatives and bactericides, additional surfactants, additional thickeners, fillers, pH adjusters and mixtures thereof.

[0121] Those skilled in the art can adjust the amount of additional adjuvants or additives so as not to adversely affect the final use of the composition according to the invention.

[0122] According to a particularly preferred embodiment, the present invention provides a composition in the form of an oil-in-water emulsion, preferably used for care and / or cosmetic keratin materials, wherein the composition comprises, relative to the total weight of the composition: (i) 3.5% to 8% by weight of at least one C14-C30 fatty alcohol selected from cetyl alcohol, stearyl alcohol and cetearyl alcohol, relative to the total weight of the composition; (ii) 0.4% to 2% by weight of at least one anionic surfactant selected from sulfonates according to formula (II). in R1 is a straight-chain or branched alkyl or alkenyl chain having 7 to 21 carbon atoms, preferably 12 to 19 carbon atoms. R2 is H or methyl, and M is sodium or potassium. C12-C20 alkyl sulfate sodium, and Its mixture; (iii) 0.2% to 2% by weight of at least one hydrophilic acrylic polymer selected from crosslinked homopolymers of acrylic acid or methacrylic acid; and (iv) 0.4% to 2% by weight of at least one amphiphilic acrylic copolymer selected from optionally crosslinked and / or neutralized copolymers of 2-acrylamido-2-methylpropanesulfonic acid and alkyl polyoxyethylene methacrylate, wherein the alkyl group contains 7 to 30 carbon atoms and the number of moles of ethylene oxide units is 1 to 30 moles, preferably 3 to 25 moles, and more preferably 5 to 25 moles.

[0123] Methods and uses The compositions of the present invention can be used in nursing and / or cosmetic keratin materials.

[0124] According to a second aspect, the present invention relates to a non-therapeutic method for using keratin materials for care and / or cosmetic purposes, comprising applying a composition according to the invention to the keratin material.

[0125] In particular, keratin materials can be skin, such as facial skin. Example

[0126] The following embodiments are given as non-limiting examples of the present invention.

[0127] Table 1 lists the main raw materials used, their product names, and their suppliers.

[0128] Table 1 Invention Examples 1-2 and Comparative Examples 1-5 The compositions of Invention Examples (IE) 1-2 and Comparative Examples (CE) 1-5 were prepared based on the amounts given in Table 2. The amounts are given as weight % of the active ingredient relative to the total weight of the composition.

[0129] Table 2 The compositions of Examples 1-2 represent compositions according to the present invention.

[0130] The composition of Comparative Example 1 does not contain any C14-C30 fatty alcohols.

[0131] The composition of Comparative Example 2 does not contain hydrophilic acrylic polymers.

[0132] The composition of Comparative Example 3 does not contain amphiphilic acrylic copolymers.

[0133] The composition of Comparative Example 4 does not contain anionic surfactants selected from sulfonates.

[0134] The composition of Comparative Example 5 does not contain at least one C14-C30 fatty alcohol in greater than 2% by weight relative to the total weight of the composition.

[0135] Preparation method: Taking the composition of Example 1 as an example, the above-listed composition is prepared as follows: 1. Homogenize the anionic surfactant, the aqueous phase component containing the polymer, and the oil phase component containing oil and fatty alcohol at 75°C; 2. Emulsify at 75°C for 10 minutes to obtain a mixture; and 3. Cool the mixture to room temperature with gentle stirring.

[0136] Evaluation of the composition The stability and texture of the prepared compositions and their sensory characteristics were evaluated.

[0137] stability Each composition was stored for 2 months at 4°C, room temperature (20°C), and 45°C, and observed visually and under a microscope. If the composition did not exhibit phase separation and no significant change in droplet size and crystal type after 2 months of storage under all conditions (4°C, room temperature (20°C), and 45°C), it was rated as "stable"; otherwise, it was rated as "unstable".

[0138] texture All obtained compositions were observed to have a creamy texture. The texture of each composition in Invention Examples 1-2 and Comparative Examples 1-5 was further evaluated using specific rheological measurement schemes in terms of smoothness, consistency, shear thinning properties, and viscosity difference.

[0139] For smoothness evaluation, after storing at room temperature for 2 months, spread the sample on a black plate with a thickness of 0.5-1 mm using a scraper, and then observe whether there are particles.

[0140] Smoothness was scored by cosmetics experts according to the following criteria: 1. It's not smooth at all; it has many particles. 2. Not very smooth, with visible particles. 3. Some parts are not smooth and have multiple particles. 4. Smooth but with a few grains 5. Very smooth, without any particles. For the purposes of this invention, a smoothness score equal to or greater than 3 is acceptable.

[0141] Consistency is used to evaluate the density of the composition upon initial application. Consistency is evaluated using a viscometer. Typically, 5 g of each composition of Invention Example 1 and Comparative Examples 1-5 is added to the viscometer, stirred uniformly, and the viscosity of each composition is recorded at 10 seconds (T10s). The viscosity of each composition at T10s is used to evaluate consistency. The higher the viscosity of the composition, the better its consistency and density.

[0142] For the purposes of this invention, a viscosity of the composition at T10s greater than 6000 mPa·s is acceptable.

[0143] Shear thinning is used to evaluate the texture change and refreshing sensation of the composition during application. Shear thinning is evaluated using a viscometer. Typically, 5 g of each composition of Invention Example 1 and Comparative Examples 1-5 is added to the viscometer and stirred uniformly. The viscosity of each composition is recorded at 10 seconds (T10s) and 30 seconds (T30s). The difference in viscosity between T10s and T30s is used to evaluate shear thinning. The greater the viscosity difference between T10s and T30s, the better the shear thinning of the composition, and the better the texture change and refreshing sensation.

[0144] For the purposes of this invention, a viscosity difference greater than 300 mPa·s is acceptable.

[0145] The viscosity difference is evaluated as follows: First, at 1 s -1 up to 200 s -1 A shearing process was applied to the sample at an increasing rate for 3 minutes, followed by 200 s. -1 The sample was held at a shear rate of 200 s for 2 minutes, then sheared for 5 minutes to allow the sample to recover from structural perturbation, and then sheared at 200 s. -1 up to 1 s -1A decreasing rate of shear was applied for 3 minutes. The viscosity of the sample was recorded as a function of the shear rate. The viscosity difference, the difference between the initial and final viscosity, can be used to evaluate shear robustness, i.e., the recovery of structure after shearing. The smaller the viscosity difference of the composition, the better the shear robustness and the better the filling performance of the composition. Generally, if the viscosity difference does not exceed 10,000 mPa·s, the shear robustness is considered acceptable.

[0146] Senses Five dermatologists rated the sensory properties of each composition in Invention Example 1 and Comparative Examples 1-5 in terms of non-greasy feel according to the following criteria.

[0147] 1: Very greasy 2: Greasy 3: It's a bit greasy. 4: A bit greasy 5: Not greasy For the purposes of this invention, a non-greasy score of 3 or greater is acceptable.

[0148] The stability of the compositions of Invention Example 1 and Comparative Examples 1-5, as well as their texture results in terms of consistency, shear thinning and smoothness, and the sensory results they provide, are summarized below.

[0149] Table 3 The compositions of Invention Examples 1-2 are stable and have a good texture, providing a good sensory experience for the skin.

Claims

1. A composition in the form of an oil-in-water emulsion, preferably used for care and / or cosmetic keratin materials, said composition comprising: (i) More than 2% by weight of at least one C14-C30 fatty alcohol relative to the total weight of the composition; (ii) at least one anionic surfactant selected from sulfonates and sulfates; (iii) at least one hydrophilic acrylic polymer; and (iv) At least one amphiphilic acrylic copolymer.

2. The composition according to claim 1, wherein the C14-C30 fatty alcohol has the structure R-OH, wherein R represents a straight-chain alkyl or alkenyl group containing 14 to 30 carbon atoms, preferably, R represents a straight-chain alkyl or alkenyl group containing 14 to 22 carbon atoms.

3. The composition according to claim 1 or 2, wherein the C14-C30 fatty alcohol is selected from cetyl alcohol, stearyl alcohol, cetearyl alcohol, arachidyl alcohol, betaine alcohol and mixtures thereof, preferably, the C14-C30 fatty alcohol is selected from betaine alcohol, cetyl alcohol, stearyl alcohol, cetearyl alcohol and mixtures thereof.

4. The composition according to any one of claims 1 to 3, wherein the C14-C30 fatty alcohol is present in an amount of 2.5% to 30% by weight, preferably 3% to 10% by weight, more preferably 3.5% to 8% by weight, relative to the total weight of the composition, and preferably, the composition contains at least one C14-C20 fatty alcohol in an amount of more than 25% by weight relative to the total weight of the C14-C30 fatty alcohol.

5. The composition according to any one of claims 1 to 4, wherein the anionic surfactant is selected from fatty acid amide sulfonates, alkyl sulfates, and mixtures thereof, preferably selected from fatty acid amide sulfonates of formula (I): in: R1 is a straight-chain or branched alkyl or alkenyl chain having 7 to 21 carbon atoms. R2 is H or methyl. R3 represents H and COO. - M + CH2COO - M + Or COOH, n is between 0 and 2, and M is selected from sodium, potassium, and ammonium. C12-C24 alkyl sulfates are in the form of alkali metal salts or alkaline earth metal salts, ammonium salts or amino alkoxides, and Its mixture.

6. The composition according to any one of claims 1 to 5, wherein the anionic surfactant is selected from potassium cocoyl taurate, potassium methyl cocoyl taurate, sodium hexanoyl methyl taurate, sodium cocoyl taurate, sodium lauroyl taurate, sodium methyl cocoyl taurate, sodium methyl lauroyl taurate, sodium methyl myristoyl taurate, sodium methyl oleoyl taurate, sodium methyl palmitoyl taurate, sodium methyl stearyl taurate, sodium C12-C20 alkyl sulfate, preferably selected from sodium methyl stearyl taurate, sodium cetearyl sulfate, and mixtures thereof.

7. The composition according to any one of claims 1 to 6, wherein the anionic surfactant is present in an amount of 0.1% to 10% by weight, preferably 0.2% to 5% by weight, more preferably 0.4% to 2% by weight, relative to the total weight of the composition.

8. The composition according to any one of claims 1 to 7, wherein the hydrophilic acrylic polymer is selected from polymers of acrylic acid, methacrylic acid, or ethyl acrylic acid, or their salts or esters, preferably, the hydrophilic gelling agent is selected from crosslinked homopolymers of acrylic acid or methacrylic acid, more preferably, the hydrophilic gelling agent is selected from carbomer.

9. The composition according to any one of claims 1 to 8, wherein the hydrophilic acrylic polymer is present in an amount of 0.01% to 10% by weight, preferably 0.1% to 5% by weight, more preferably 0.2% to 2% by weight, relative to the total weight of the composition.

10. The composition according to any one of claims 1 to 9, wherein the amphiphilic acrylic copolymer is selected from 2-acrylamido-2-methylpropanesulfonic acid and at least one olefinic unsaturated monomer comprising at least one hydrophobic portion containing 7 to 30 carbon atoms, particularly 8 to 22 carbon atoms. Preferably, the amphiphilic acrylic copolymer is selected from copolymers of optionally crosslinked and / or neutralized 2-acrylamido-2-methylpropanesulfonic acid and alkyl polyoxyethylene methacrylate, wherein the alkyl group contains 7 to 30 carbon atoms, particularly 8 to 22 carbon atoms, and the number of molars of ethylene oxide units is 1 to 30 moles, preferably 3 to 25 moles, and more preferably 5 to 25 moles. More preferably, the amphiphilic acrylic copolymer is selected from ammonium acryloyl dimethyl taurate / betaine polyether-25 methacrylate crosspolymer, ammonium acryloyl dimethyl taurate / stearyl alcohol polyether-25 methacrylate crosspolymer, and combinations thereof.

11. The composition according to any one of claims 1 to 10, wherein the amphiphilic acrylic copolymer is present in an amount of 0.1% to 5% by weight, preferably 0.2% to 5% by weight, more preferably 0.4% to 2% by weight, relative to the total weight of the composition.

12. The composition according to any one of claims 1 to 11, wherein the composition comprises an aqueous phase in an amount of 10% to 90% by weight, more preferably 20% to 85% by weight, relative to the total weight of the composition.

13. The composition according to any one of claims 1 to 12, wherein the composition comprises an oil phase in an amount of 1% to 30% by weight, preferably 5% to 20% by weight, relative to the total weight of the composition.

14. The composition of claim 1, wherein, relative to the total weight of the composition, it comprises: (i) 3.5% to 8% by weight of at least one C14-C30 fatty alcohol selected from cetyl alcohol, stearyl alcohol and cetearyl alcohol, relative to the total weight of the composition; (ii) 0.4% to 2% by weight of at least one anionic surfactant selected from sulfonates according to formula (II). in R1 is a straight-chain or branched alkyl or alkenyl chain having 7 to 21 carbon atoms, preferably 12 to 19 carbon atoms. R2 is H or methyl, and M is sodium or potassium. C12-C20 alkyl sulfate sodium, and Its mixture; (iii) 0.2% to 2% by weight of at least one hydrophilic acrylic polymer selected from crosslinked homopolymers of acrylic acid or methacrylic acid; and (iv) 0.4% to 2% by weight of at least one amphiphilic acrylic copolymer selected from optionally crosslinked and / or neutralized copolymers of 2-acrylamido-2-methylpropanesulfonic acid and alkyl polyoxyethylene methacrylate, wherein the alkyl group contains 7 to 30 carbon atoms and the number of moles of ethylene oxide units is 1 to 30 moles, preferably 3 to 25 moles, and more preferably 5 to 25 moles.

15. A non-therapeutic method for using a keratin material for care and / or cosmetic purposes, comprising applying the composition according to any one of claims 1 to 14 to the keratin material.

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