BR112020007992B1 - COMPOSITION IN THE FORM OF AN EMULSION - Google Patents

Abstract

The invention relates to a composition in the form of an emulsion, in particular in the form of an oil-in-water emulsion, comprising a twin surfactant having a specific chemical structure with at least two fatty amide groups and at least one lipophilic polymer. comprising at least hydroxyethyl acrylate units and acrylate units bearing a lipophilic group, wherein the weight ratio of the sum of all hydroxyethyl acrylate units to the sum of all acrylate units bearing a lipophilic group is in the range of 1:30 to 1:1 and wherein the lipophilic polymer has a number-average molecular weight Mn in the range of 2,000 to 9,000 g/mol. The composition according to the invention makes it possible to obtain a cosmetic emulsion that has an increased sun protection factor, while at the same time having good cosmetic properties, such as a non-greasy and non-sticky feel, while being, at the same time, time, stable, particularly from a physicochemical point of view.

Description

[0001] The present application relates to a composition in the form of an emulsion comprising at least one UV filter agent, at least one twin surfactant having a specific chemical structure with at least two fatty amide groups, and at least one lipophilic polymer that has been suitably selected, and the use of said composition, in the fields of cosmetics and dermatology, in particular to care for keratin materials for treatment and, in particular, to care for, protect and/or make-up the skin of the body or the face, or for hair care.

[0002] The vast majority of photoprotective compositions are in the form of an O/W type emulsion, and contain, in various concentrations, one or more conventional fat-soluble organic filter agents and/or one or more conventional organic filter agents soluble in water and/or one or more mineral filter agents.

[0003] These compositions have the ability to selectively absorb harmful UV radiation, wherein these filtering agents and the amount thereof are selected as a function of the desired sun protection factor (SPF).

[0004] However, the cosmetic properties of photoprotective agents are often judged to be insufficient; they sometimes appear very oily and very sticky, and SPF enhancers, known from the prior art, do not always improve these properties, or even degrade them.

[0005] Therefore, there is a need to obtain photoprotective compositions that have photoprotective indices that are improved or, in any case, greater than those that can be obtained with photoprotective systems alone, while, at the same time, having advantageous cosmetic properties or an attractiveness non-degraded cosmetics, and satisfactory physical-chemical stability for the use of a product on the market.

[0006] Surprisingly, the applicant found that the combination of at least one twin surfactant that has a specific chemical structure with at least two fatty amide groups and a lipophilic polymer that has been suitably selected, in a cosmetic composition in the form of an emulsion that comprises a photoprotective system that has the capacity to filter UV radiation, making it possible to solve the problem presented above.

[0007] Thus, a matter of the present invention is a composition in the form of an emulsion comprising at least one UV filter agent, at least one twin surfactant having the chemical formula below and also the stereoisomers thereof: where: a) R1 denotes an alkyl radical having 1 to 25 carbon atoms or a radical having the formula below: -(CH2)k1-CH[-NH-CO-(CH2)l-CH3]-( CH2)j1-Y' b) R3 denotes an alkyl radical having 1 to 25 carbon atoms or a radical having the Formula below: -(CH2)k2-CH[-NH-CO-(CH2)l-CH3 ]-(CH2)j2-Y' c) R2 denotes a spacer consisting of a linear or branched alkylene chain having 1 to 12 carbon atoms or a radical of Formula -CH(Y')-(CH2)n '-; wherein: d) represents an integer between 1 and 8, preferably between 3 and 5, and even more preferably equal to 4; Y' represent, independently of each other, a carboxylic acid group or an alkaline salt of a carboxylic acid group, such as a sodium salt of a carboxylic acid group; j1, k1, j2 and k2 represent an integer such that (j1, k1, j2, k2) = (2, 0, 2, 0), (2, 0, 0, 2), (0, 2, 2, 0) or (0, 2, 0, 2); el represents an integer from 6 to 16, preferably from 8 to 14, and more preferably from 10 to 12; and d) (OM)2, -C2H4-SO3M, -C3H6-SO3M or -CH2(CHOH)4CH2OH, where M and M' represent H or an alkali metal or alkaline earth metal or ammonia or alkanolammonium ion, • a is in the range from 0 to 15, • b is in the range 0 to 10, and • the sum of a + b is in the range 1 to 25; ee) n is in the range of 1 to 10; and at least one lipophilic polymer comprising monomeric units of Formulas (A) and (B): wherein: R, independently of each other, are chosen from alkyl or alkylene radicals; wherein at least 60% by weight of the R groups are behenyl radicals, with the percentage by weight referring to the sum of all R groups present in the polymer; the weight ratio of the sum of all hydroxyethyl acrylate units to the sum of all acrylate units bearing the R group is in the range of 1:30 to 1:1; and the sum of the total of units A and B is at least 95% by weight of the total weight of the polymer.

[0008] The composition according to the invention makes it possible to obtain a cosmetic emulsion that has an increased sun protection factor, while at the same time having good cosmetic properties, such as a non-greasy and non-sticky feel, and is , at the same time, stable, particularly from a physicochemical point of view.

[0009] The emulsion obtained according to the invention has good stability over time, even at a temperature above ambient temperature (for example, 45 °C).

[0010] The term “stable emulsion” should mean an emulsion that does not exhibit any macroscopic and microscopic changes (in color, odor, viscosity, nor any variation in pH) after storage and/or temperature change, in particular after 24 hours at a temperature equal to the ambient temperature (AT), 4 °C or 45 °C.

[0011] A subject of the invention is also a cosmetic treatment process for caring for and/or preparing keratin materials, which consists of applying a composition to the keratin materials, as defined above.

[0012] A subject of the invention is also the use of said composition in the field of cosmetics or dermatology, and in particular for caring for, protecting and/or processing keratin materials, such as body or facial skin, or hair.

[0013] The composition, according to the invention, is intended for topical application and, therefore, comprises a physiologically acceptable medium. The term “physiologically acceptable medium” is understood here as a medium that is compatible with keratin materials.

[0014] In the context of the present invention, the term “keratin material” should especially mean skin, scalp, keratin fibers, such as eyelashes, eyebrows, hair, body hair, nails and membranes of the mucosa, such as the lips, and more particularly the skin (of the body, face, area around the eyes, eyelids).

[0015] In the following text, the expression “at least one” is equivalent to “one or more” and, unless otherwise indicated, the limits of a range of values are included in this range.

TWIN SURFACTANTS COMPRISING AT LEAST TWO GREASY AMIDE GROUPS

[0016] The composition, according to the invention, comprises at least one twin surfactant that has the chemical formula below, and also the stereoisomers thereof: where: a) R1 denotes an alkyl radical having 1 to 25 carbon atoms or a radical having the formula below: -(CH2)k1-CH[-NH-CO-(CH2)l-CH3]-( CH2)j1-Y' b) R3 denotes an alkyl radical having 1 to 25 carbon atoms or a radical having the Formula below: -(CH2)k2-CH[-NH-CO-(CH2)l-CH3 ]-(CH2)j2-Y' c) R2 denotes a spacer consisting of a linear or branched alkylene chain having 1 to 12 carbon atoms or a radical of Formula -CH(Y')-(CH2)n '-; wherein: d) represents an integer between 1 and 8, preferably between 3 and 5, and even more preferably equal to 4; e) represent, independently of each other, a carboxylic acid group or an alkaline salt of a carboxylic acid group, such as a sodium salt of a carboxylic acid group; j1, k1, j2 and k2 represent an integer such that (j1, k1, j2, k2) = (2, 0, 2, 0), (2, 0, 0, 2), (0, 2, 2, 0) or (0, 2, 0, 2); el represents an integer from 6 to 16, preferably from 8 to 14, and more preferably from 10 to 12; and d) (OM)2, -C2H4-SO3M, -C3H6-SO3M or -CH2(CHOH)4CH2OH, where M and M' represent H or an alkali metal or alkaline earth metal or ammonia or alkanolammonium ion, • a is in the range from 0 to 15, • b is in the range 0 to 10, and • the sum of a + b is in the range 1 to 25; and e) n is in the range of 1 to 10.

[0017] According to a first embodiment of the invention, the twin surfactant (or surfactants) is chosen from among the compounds of Formula (II), and also the stereoisomers thereof. where: • R1 and R3 denote, independently of each other, an alkyl radical containing from 1 to 25 carbon atoms; • R2 denotes a spacer consisting of a linear or branched alkylene chain containing 1 to 12 carbon atoms; • OM)2, -C2H4-SO3M, -C3H6-SO3M or -CH2(CHOH)4CH2OH, where M and M' represent H or an alkali metal or alkaline earth metal or ammonia or alkanolammonium ion, • a is in the range 0 to 15, • b is in the range 0 to 10, and • the sum of a + b is in the range 1 to 25; e - n is in the range of 1 to 10.

[0018] According to a preferred embodiment, the twin surfactant (or surfactants) of Formula (II) is such that each of the groups R1-CO- and R3-CO- comprises from 8 to 20 carbon atoms, and preferably denotes a residue of coconut fatty acid (comprising mainly lauric acid and myristic acid).

[0019] According to another preferred embodiment, the twin surfactant (or surfactants) of Formula (II) is such that, for each of the radicals X and Y, the sum of a and b has an average value in the range of 10 to 20 and is preferably equal to 15. A preferred group for Z is the -SO3M group, where M is preferably an alkali metal ion, such as a sodium ion.

[0020] In Formula (II), as defined above, the spacer R2 is advantageously constituted by a linear C1-C3 alkylene chain, and preferably an ethylene chain (CH2CH2).

[0021] Finally, n is advantageously equal to 1.

[0022] A surfactant of this type is, in particular, the one identified by the name INCI: Sodium dicocoylethylenediamine PEG-15 sulfate which has the following structure: wherein, PEG is understood to represent the CH2CH2O group and cocoyl represents the coconut fatty acid residue.

[0023] This surfactant has a molecular structure very similar to that of ceramide-3.

[0024] Preferably, the twin surfactant of Formula (II) of the invention is used as a mixture with other surfactants and, in particular, as a mixture with (a) a glyceryl ester of a C6-C22 fatty acid (preferably C14-C20 , such as a stearate), (b) a diester of a C6-C22 fatty acid (preferably C14-C20, such as a stearate) and citric acid and glycerol, and (c) a C10-C30 fatty alcohol (preferably behenyl alcohol).

[0025] More preferably, the twin surfactant of Formula (II), according to the invention, represents 10% to 20% by weight and advantageously 15% by weight; the glyceryl ester of a C6-C22 fatty acid represents 30% to 40% by weight, advantageously 35% by weight; the diester of a C6C22 fatty acid and citric acid and glycerol represents 10% to 20% by weight, advantageously 15% by weight; and the C10-C30 fatty alcohol represents 30% to 40% by weight, advantageously 35% by weight, with respect to the total weight of the surfactant mixture containing the twin surfactant.

[0026] As a variant, the twin surfactant of Formula (II), according to the invention, can be used as a mixture with an anionic surfactant, such as a lauric acid ester, sodium lauryl lactate. In this case, the twin surfactant preferably represents 30 to 50% by weight, and the anionic surfactant represents 30 to 50% by weight, relative to the total weight of the mixture.

[0027] The twin surfactant can be used, for example, as a mixture with other surfactants in the form of products sold by the company Sasol under the names Ceralution® and, in particular, the following products: • Ceralution® H: Beenyl Alcohol, Stearate of Glyceryl, Glyceryl Stearate Citrate and Sodium Dicocoylethylenediamine PEG-15 Sulfate, • Ceralution® F: Sodium Lauroyl Lactylate and Sodium Dicocoylethylenediamine PEG-15 Sulfate, • Ceralution® C: Aqua, Capric Triglyceride/ Caprylic, Glycerin, Ceteareth-25, Sodium Dicocoylethylenediamine PEG-15 Sulfate, Sodium Lauroyl Lactylate, Beenyl Alcohol, Glyceryl Stearate, Glyceryl Citrate/Stearate, Gum Arabic, Xanthan Gum, Phenoxyethanol, Methylparaben, Ethylparaben, Butylparaben , Isobutylparaben (INCI names).

[0028] According to a particular embodiment of the invention, the twin surfactant (or surfactants) of Formula (II) is in the form of a mixture of surfactants comprising from 3% to 50% by weight of twin surfactants of Formula (II) , preferably from 10% to 50% by weight, and even more preferably from 10% to 20% by weight, with respect to the total weight of the mixture.

[0029] The twin surfactant (or surfactants) of Formula (II) may be present in the composition, according to the invention, in an active material content in the range of 0.01% to 5% by weight, relative to the weight total composition, preferably in the range of 0.1% to 3% by weight and even better in the range of 0.2% to 1.5% by weight.

[0030] According to a second embodiment of the invention, the twin surfactant (or surfactants) is chosen from among the compounds of Formula (III), and also their stereoisomers: wherein: Y' represent, independently of each other, a carboxylic acid group or an alkaline salt of a carboxylic acid group, such as a sodium salt of a carboxylic acid group; j1, k1, j2 and k2 represent an integer such that (j1, k1, j2, k2) = (2, 0, 2, 0), (2, 0, 0, 2), (0, 2, 2, 0) or (0, 2, 0, 2); el represents an integer from 6 to 16, preferably from 8 to 14, and more preferably from 10 to 12.

[0031] According to a particular embodiment of the invention, in Formula (III), l represents an integer in the range of 8 to 12, j1 = j2 = 0, and k1 = k2 = 2.

[0032] Preferably, in Formula (III), Y’ represents -COONa, j1 = j2 = 0, k1 = k2 = 2; and l = 10.

[0033] Through examples of twin surfactants of Formula (III), mention can be made of sodium dilauramidoglutamide lysine, sodium dimyristoylglutamide lysine and sodium distearoylglutamide lysine. Sodium dilauramidoglutamide lysine is particularly preferred. Sodium dilauramidoglutamide lysine is sold, privately, by the company Asahi Kasei Chemicals under the names Pellicer L-30 and Pellicer LB-10.

[0034] The twin surfactant (or surfactants) of Formula (III) is, in particular, described in application No. WO 2004/020394.

[0035] The twin surfactant (or surfactants) comprising at least two fatty amide groups of Formula (III) may be present in the composition in an amount of active material in the range of 0.01% to 5% by weight, preferably 0. 0.01% to 1% by weight, and even more preferably from 0.01% to 0.7% by weight, with respect to the total weight of the composition.

[0036] According to a preferred embodiment, the twin surfactant (or surfactants) present in the composition, according to the invention, is chosen from among the compounds of Formula (II), as defined above, and also the stereoisomers thereof.

LIPOPHILIC POLYMERS

[0037] The composition, according to the invention, comprises at least one lipophilic polymer comprising monomeric units of Formulas (A) and (B): wherein: R, independently of each other, are chosen from alkyl or alkylene radicals; wherein at least 60% by weight of the R groups are behenyl radicals, with the percentage by weight referring to the sum of all R groups present in the polymer; the weight ratio of the sum of all hydroxyethyl acrylate units to the sum of all acrylate units bearing the R group is in the range of 1:30 to 1:1; and the sum of the total of units A and B is at least 95% by weight of the total weight of the polymer.

[0038] Preferably, R is constituted by alkyl radicals, preferably by C16-C22 alkyl radicals, and more preferably by behenyl radicals (C22).

[0039] Preferably, at least 70% by weight of the R groups are behenyl radicals, preferably at least 80% by weight, and more preferably at least 90% by weight.

[0040] According to a preferred embodiment, all R groups are behenyl radicals.

[0041] Preferably, said weight ratio is in the range of 1:15 to 1:1, preferably it is in the range of 1:10 to 1:4.

[0042] Advantageously, the polymeric units present in the polymer are made up of units (A) and (B) previously described.

[0043] The polymer has a numerical average molecular weight Mn that is in the range of 2,000 to 9,000 g/mol, preferably in the range of 5,000 to 9,000 g/mol. The number average molecular weight can be measured with the gel permeation chromatography method, for example according to the method described in the example hereinafter.

[0044] Preferably, the polymer has a melting point that is in the range of 60 °C to 69 °C, and preferably in the range of 63 °C to 67 °C. The melting point is measured by differential scanning calorimetry (DSC), for example according to the method described in the example hereinafter.

[0045] The polymer used according to the invention can be prepared by polymerizing the monomer of Formula CH2=CH-COO- R, where R has the meaning previously described, and 2-hydroxyethyl acrylate.

[0046] Polymerization can be carried out according to known methods, such as solution polymerization or emulsion polymerization.

[0047] Polymerization is described, for example, in document No. U.S. 2007/0264204.

[0048] The lipophilic polymer (or polymers) used in the context of the invention and, as previously described, may be present in the composition in an amount of active material in the range of 0.1% to 10% by weight, preferably 0.1 % to 3% by weight, relative to the total weight of the composition.

UV FILTER AGENTS

[0049] The composition according to the invention comprises one or more UV filtering agents. Said UV filter agents can be chosen from water-soluble, lipid-soluble or insoluble organic UV filter agents and/or mineral pigments. Preferably, the composition according to the invention comprises at least one hydrophilic, lipophilic or insoluble organic UV filter agent.

[0050] The term “water-soluble UV filter agent” shall mean any organic or inorganic cosmetic or dermatological compound for filtering UV radiation, which can be completely dissolved in molecular form or mixed into a liquid aqueous phase or can even be dissolved in colloidal form (e.g., in micellar form) in a liquid aqueous phase.

[0051] The term “fat-soluble filter agent” shall mean any organic or inorganic cosmetic or dermatological compound for filtering UV radiation that can be completely dissolved in molecular form or mixed into an oily phase or can even be dissolved in colloidal form (e.g. , in micellar form) in an oily phase.

[0052] The term “insoluble UV filter agent” shall mean any cosmetic or dermatological mineral or organic compound for filtering UV radiation that has a water solubility of less than 0.5% by weight and a solubility of less than 0.5% in weight mostly organic solvents such as liquid paraffin, fatty alcohol benzoates and fatty acid triglycerides, for example Miglyol 812® sold by the company Dynamit Nobel. This solubility, determined at 70 °C, is defined as the amount of product in solution in the solvent in equilibrium with an excess of suspended solid after returning to room temperature.

A) ORGANIC UV FILTER AGENTS

[0053] Organic UV filter agents are, in particular, chosen from cinnamic compounds; dibenzoylmethane compounds; anthranilate compounds; salicylic compounds; benzylidene camphor compounds; benzophenone compounds; β,β-diphenyl acrylate compounds; triazine compounds; benzotriazole compounds, in particular the silicone benzotriazoles described in patent document No. EP0392883 and the methylenebis(hydroxyphenyl benzotriazole) compounds as described in applications No. U.S. 5237071, U.S. 5166355, GB2303549, DE 19726184 and EP893119; benzalmalonate compounds, in particular those mentioned in U.S. Patent Document No. 5,624,663; benzimidazole derivatives; imidazoline compounds; the bis-benzoazolyl compounds as described in patent documents No. EP669323 and U.S. 2463264; p-aminobenzoic compounds (PABA); the benzoxazole compounds as described in patent applications No. EP0832642, EP1027883, EP1300137 and DE10162844; filter polymers and filter silicones such as those described in particular in application No. WO-93/04665; α-alkylstyrene-based dimers, such as those described in patent application no. DE19855649; 4,4-diarylbutadiene compounds such as those described in applications Nos. EP0967200, DE19746654, DE19755649, EP-A-1008586, EP1133980 and EP133981; merocyanine compounds as described in U.S. Patent Document No. 4195999, Application No. WO2004/006878, Application Nos. WO2008/090066, WO2011113718, WO2009027258, WO2013010590, WO2013011094, WO20130 11480 and in documents IP COM Journal N°000179675D published on 23 February 2009, IP COM Journal N°000182396D published on April 29, 2009, IP COM Journal N° 000189542D published on November 12, 2009 and IP COM Journal N°IPCOM000011179D published on 04/03/2004, and mixtures of same.

[0054] As examples of organic photoprotective agents, mention may be made of those denoted below in the present document under their name INCI:

DIBENZOYLMETHANE COMPOUNDS

[0055] Butyl methoxydibenzoylmethane sold privately under the trade name Parsol 1789® by DSM Nutritional Products, Inc. CYNAMIC COMPOUNDS: Ethylhexyl methoxycinnamate sold privately under the trade name Parsol MCX® by DSM Nutritional Products, Methoxycinnamate Isopropyl Methoxycinnamate, Isoamyl Methoxycinnamate sold under the trade name Neo Heliopan E 1000® by Symrise, DEA Methoxycinnamate, Diisopropyl Methyl Cinnamate, Glyceryl Ethylhexanoate Dimethoxycinnamate. PARA-AMINOBENZOIC COMPOUNDS: PABA, Ethyl PABA, Ethyl-dihydroxypropyl PABA, Ethylhexyl-dimethyl PABA sold, in particular, under the name Escalol 507® by ISP, Glyceryl PABA, PEG-25 PABA sold under the name Uvinul P25 ® by BASF. SALICYLIC COMPOUNDS: Homosalate, sold under the name Eusolex HMS® by Rona/EM Industries, Ethylhexyl salicylate sold under the name Neo Heliopan OS® by Symrise, Dipropylene glycol salicylate sold under the name Dipsal® by Scher, TEA salicylate sold under the name under the name Neo Heliopan TS® by Symrise, β,β-DiPHENyl ACRYLATE COMPOUNDS: Octocrylene sold in particular under the trade name Uvinul N 539® by BASF, Etocrylene sold in particular under the trade name Uvinul N 35 ® by BASF. BENZOPHENONE COMPOUNDS: Benzophenone-1, sold under the trade name Uvinul 400® by BASF, Benzophenone-2, sold under the trade name Uvinul D 50® by BASF, Benzophenone-3 or Oxybenzone, sold under the trade name Uvinul M 40® by BASF, Benzophenone-4, sold under the trade name Uvinul MS 40® by BASF, Benzophenone-5, Benzophenone-6 sold under the trade name Helisorb 11® by Norquay, Benzophenone-8 sold under the trade name Spectra-Sorb UV- 24® by American Cyanamid, Benzophenone-9 sold under the trade name Uvinul DS 49® by BASF, Benzophenone-12, n-hexyl 2-(4-diethylamino-2-hydroxybenzoyl)benzoate sold under the trade name Uvinul A Plus® or, as a mixture with octyl methoxycinnamate, under the trade name Uvinul A Plus B® by the company BASF, 1,1'-(1,4-piperazinadi-yl)bis[1-[2-[4-(diethylamino) -2-hydroxybenzoyl]phenyl]methanone] (CAS No. 919803-06-8), as described in patent application No. WO 2007/071584; this compound which is advantageously used in micronized form (average size 0.02 to 2 μm), which can be obtained, for example, according to the micronization process described in patent applications No. GB-A-2303549 and EP -A-893119 and, in particular, in the form of an aqueous dispersion. BENZYLIDENE CAMPHOR COMPOUNDS: 3-Benzylidene camphor manufactured under the name Mexoryl SD® by Chimex, 4-Methylbenzylidene camphor sold under the name Eusolex 6300® by Merck, Benzylidene camphor sulfonic acid manufactured under the name Mexoryl SL® by Chimex, Camphor methosulfate Benzalkonium manufactured under the name Mexoryl SO® by Chimex, Terephthalylidene Dicamphor Sulphonic Acid manufactured under the name Mexoryl SX® by Chimex, Polyacrylamide Methylbenzylidene Camphor manufactured under the name Mexoryl SW® by Chimex.

PHENYLBENZIMIDAZOLE COMPOUNDS:

[0056] Phenylbenzimidazolsulfonic acid sold, in particular, under the trade name Eusolex 232® by Merck.

BIS-BENZOAZOLYL COMPOUNDS

[0057] Disodium phenyl dibenzimidazole tetrasulfonate sold under the trade name Neo Heliopan AP® by Symrise.

BENZOTRIAZOLE COMPOUNDS

[0058] Drometrizol trisiloxane manufactured under the name Mexoryl SX® by Chimex; Methylenebis(benzotriazolyl)tetramethylbutylphenol, in particular in solid form, such as the product sold under the trade name Mixxim BB/100® by Fairmount Chemical, or in the form of an aqueous dispersion of micronized particles having an average particle size in the range of 0 .01 to 5 μm, more preferably from 0.01 to 2 μm and more particularly from 0.020 to 2 μm, wherein at least one alkylpolyglucoside surfactant has the structure CnH2n+1O(C6H10O5)xH, where n is an integer from 8 to 16 and x is the average degree of polymerization of the unit (C6H10O5) and is in the range of 1.4 to 1.6, as described in patent document No. GB-A-2303549, sold, in particular, under the trade name Tinosorb M® by the company BASF, or in the form of an aqueous dispersion of micronized particles with an average particle size in the range of 0.02 to 2 μm, more preferably of 0.01 to 1.5 μm and more particularly of 0.02 to 1 μm, in the presence of at least one mono(C8-C20)alkyl polyglyceryl ester with a degree of glycerol polymerization of at least 5, such as the aqueous dispersions described in patent application No. WO 2009/ 063392. TRIAZINE COMPOUNDS: - Bis-ethylhexyloxyphenol methoxyphenyl triazine sold under the trade name Tinosorb S® by BASF, - Ethylhexyl triazone sold, in particular, under the trade name Uvinul T150® by BASF, - Diethylhexyl butamido triazone sold under the trade name Uvasorb HEB® by Sigma 3V, - 2,4,6-tris(dineopentyl4'-aminobenzalmalonate)-s-triazine, - 2,4,6-tris(diisobutyl4'-aminobenzalmalonate) -s-triazine, - 2,4-bis(n-butyl4'-aminobenzoate)-6-(aminopropyltrisiloxane)- s-triazine, - 2,4-bis(dineopentyl4'-aminobenzalmalonate)-6-( n-butyl 4'-aminobenzoate)-s-triazine, - symmetric triazine filter agents substituted by naphthalenyl groups or polyphenyl groups described in U.S. Patent Document No. 6225467, in Patent Application No. WO 2004/085412 (see compounds 6 and 9) or in the document “Symmetrical Triazine Derivatives”, IP.COM IPCOM000031257 Journal, INC West Henrietta, NY, U.S. (September 20, 2004), especially 2,4,6-tris(diphenyl)triazine and 2 ,4,6-tris(terphenyl)triazine, which is also mentioned in patent applications No. WO 06/035000, WO 06/034982, WO 06/034991, WO 06/035007, WO 2006/034992 and WO 2006/034985 , wherein these compounds are advantageously used in micronized form (average particle size 0.02 to 3 μm), which can be obtained, for example, according to the micronization process described in patent applications No. GB-A -2303549 and EP-A-893119 and especially in aqueous dispersion; and - silicone triazines substituted by two aminobenzoate groups, as described in patent document No. EP 0841341, in particular, 2,4-bis(4'-n-butyl aminobenzalmalonate)-6-[(3-{1,3 ,3,3-tetramethyl-1-[(trimethylsilyl)oxy]disiloxanyl}propyl)amino]-s-triazine.

ANTHRANILIC COMPOUNDS:

[0059] Menthyl anthranilate sold under the trade name Neo Heliopan MA® by Symrise.

IMIDAZOLINE COMPOUNDS:

[0060] Ethylhexyl dimethoxybenzylidene dioxoimidazoline propionate.

BENZALMALONATE COMPOUNDS:

[0061] Polyorganosiloxane containing benzalmalonate functions, for example, Polysilicone-15, sold under the trade name Parsol SLX® by DSM Nutritional Products, Inc.

4,4-DIARYLBUTADIENE COMPOUNDS:

[0062] 1,1-dicarboxy(2,2'-dimethylpropyl)-4,4-diphenylbutadiene.

BENZOXAZOLE COMPOUNDS:

[0063] 2,4-bis[5-(1,1-dimethylpropyl)benzoxazol-2-yl(4-phenyl)imino]-6-(2-ethylhexyl)imino-1,3,5-triazine sold under the name Uvasorb K2A® by Sigma 3V.

[0064] Preferred organic filter agents are chosen from: Butyl methoxydibenzoylmethane Ethylhexyl methoxycinnamate Ethylhexyl salicylate, Homosalate, Octocrylene, Phenylbenzimidazolsulfonic acid, Benzophenone-3, Benzophenone-4, Benzophenone-5, 2-(4- n-hexyl diethylamino-2-hydroxybenzoyl)benzoate, 4-methylbenzylidenecamphor, Terephthalylidene dicamphor sulfonic acid, Disodium phenyldibenzimidazole tetrasulfonate, Methylenebis(benzotriazolyl)tetramethylbutylphenol, Bis-ethylhexyloxyphenol methoxyphenyl triazine, Ethylhexyl triazone Diethylhexyl butamidotriazone, 2 ,4,6-tris(dineopentyl 4'-aminobenzalmalonate)-s-triazine, 2,4,6-tris(diisobutyl 4'-aminobenzalmalonate)-s-triazine, 2,4-bis(4'- n-butyl aminobenzoate)-6-(aminopropyltrisiloxane)- s-triazine, n-butyl aminobenzoate)-s-triazine, 2,4-bis(n-butyl 4'-aminobenzalmalonate)-6-[(3- {1,3,3,3-tetramethyl-1-[(trimethylsilyl)oxy]disiloxanyl}propyl)amino]-s-triazine, 2,4,6-tris(diphenyl)triazine, 2,4,6-tris( terphenyl)triazine, Drometrizol trisiloxane, Polysilicone-15, 1,1-dicarboxy(2,2'-dimethylpropyl)-4,4-diphenylbutadiene, 2,4-bis[5-(1-dimethylpropyl)benzoxazol-2-yl- (4-phenyl)imino]-6-(2-ethylhexyl)imino-1,3,5-triazine, and mixtures thereof. Particularly preferred organic filter agents are chosen from: Butyl methoxydibenzoylmethane Ethylhexyl salicylate, Homosalate, Octocrylene, n-hexyl 2-(4-diethylamino-2-hydroxybenzoyl)benzoate, Terephthalylidene dicamphor sulfonic acid, Bis-ethylhexyloxyphenol methoxyphenyl triazine, Ethylhexyl triazone Diethylhexyl butamidotriazone, 2,4-bis(n-butyl 4'-aminobenzalmalonate)-6-[(3-{1,3,3,3-tetramethyl-1-[(trimethylsilyl )oxy]disiloxanyl}propyl)amino]-s-triazine, Drometrizol trisiloxane, and mixtures thereof.

B) INORGANIC UV FILTER AGENTS

[0065] The mineral UV filter agents used in accordance with the present invention are metal oxide pigments. More preferably, the inorganic UV filtering agents of the invention are metal oxide particles having an average elementary particle size less than or equal to 0.5 μm, more preferably between 0.005 and 0.5 μm, even more preferably between 0.01 and 0.2 μm, further between 0.01 and 0.1 μm and more particularly between 0.015 and 0.05 μm.

[0066] They can be chosen, in particular, from titanium oxide, zinc oxide, iron oxide, zirconium oxide and cerium oxide, or mixtures thereof.

[0067] Such coated or uncoated metal oxide pigments are described, in particular, in patent application No. EP-A-0518773. Commercial pigments that may be mentioned include products sold by Sachtleben Pigments, Tayca, Merck and Degussa.

[0068] Metal oxide pigments can be coated or uncoated.

[0069] Coated pigments are pigments that have undergone one or more surface treatments of a chemical, electronic, mechanochemical and/or mechanical nature with compounds such as amino acids, beeswax, fatty acids, fatty alcohols, anionic surfactants, lecithins, sodium, potassium, zinc, iron or aluminum salts of fatty acids, metal alkoxides (of titanium or aluminum), polyethylene, silicones, proteins (collagen, elastin), alkanolamines, silicon oxides, metal oxides or sodium hexametaphosphate.

[0070] The coated pigments are, more particularly, titanium oxides that have been coated: - with silica, such as the Sunveil® product from the company Ikeda, - with silica and iron oxide, such as the Sunveil F® product from the company Ikeda , - with silica and alumina, such as the products Microtitanium Dioxide MT 500 SA® and Microtitanium Dioxide MT 100 SA from the company Tayca and Tioveil from the company Tioxide, - with alumina, such as the products Tipaque TTO-55 (B)® and Tipaque TTO-55 (A)® from the company Ishihara, and UVT 14/4 from the company Sachtleben Pigments, - with alumina and aluminum stearate, such as the products Microtitanium Dioxide MT 100 T®, MT 100 TX®, MT 100 Z® and MT-01® from the company Tayca, the products Solaveil CT-10 W® and Solaveil CT 100® from the company Uniqema and the product Eusolex T-AVO® from the company Merck, - with silica, alumina and alginic acid, just like the MT product -100 AQ® from the company Tayca, - with alumina and aluminum laurate, such as the product Microtitanium Dioxide MT 100 S® from the company Tayca, - with iron oxide and iron stearate, such as the product Microtitanium Dioxide MT 100 F® from the company Tayca, - with zinc oxide and zinc stearate, such as the product BR 351® from the company Tayca, - with silica and alumina, and treated with a silicone, such as the products Microtitanium Dioxide MT 600 SAS®, Microtitanium Dioxide MT 500 SAS® or Microtitanium Dioxide MT 100 SAS® from the company Tayca, - with silica, alumina and aluminum stearate, and treated with a silicone, such as the STT-30-DS® product from the company Titan Kogyo, - with silica and treated with a silicone, such as the UV product - Titan from the company Sachtleben Pigments, - with triethanolamine, such as the product STT-65-S from the company Titan Kogyo, - with stearic acid, such as the product Tipaque TTO-55 (C)® from the company Ishihara, - with sodium hexametaphosphate, such as the product Microtitanium Dioxide MT 150 W® from the company Tayca, - TiO2 treated with octyltrimethylsilane, sold under the trade name T 805® by the company Degussa Silices, - TiO2 treated with a polydimethylsiloxane, sold under the trade name 70250 Cardre UF TiO2SI3® by the company Cardre, and - TiO2 of anatase/rutile treated with a polydimethylhydrogensiloxane, sold under the trade name Microtitanium Dioxide USP Grade Hydrophobic® by the company Color Techniques.

[0071] Mention may also be made of TiO2 pigments doped with at least one transition metal, such as iron, zinc or manganese and more particularly manganese. Preferably, said doped pigments are in the form of an oily dispersion. The oil present in the oily dispersion is preferably chosen from triglycerides including those of capric/caprylic acids. The oily dispersion of titanium oxide particles may also comprise one or more dispersants, for example, a sorbitan ester, for example, sorbitan isostearate, or a polyoxyalkylenated fatty acid ester of glycerol, for example, myristyl ether citrate of TRI-PPG-3 and polyglyceryl-3 polyricinoleate. Preferably, the oily dispersion of titanium oxide particles comprises at least one dispersant chosen from polyoxyalkylenated fatty acid esters of glycerol. Mention may be made more particularly of the oily dispersion of TiO2 particles doped with manganese in capric/caprylic acid triglyceride in the presence of TRI-PPG-3 myristyl ether citrate and polyglyceryl-3 polyricinoleate, and sorbitan isostearate which has the INCI name: titanium dioxide (and) TRI-PPG-3 myristyl ether citrate (and) polyglyceryl-3 ricinoleate (and) sorbitan isostearate, for example, the product sold under the trade name Optisol TD50® by the company Croda .

[0072] Uncoated titanium oxide pigments are sold, for example, by the company Tayca under the trade names Microtitanium Dioxide MT 500 B® or Microtitanium Dioxide MT 600 B, by the company Degussa under the name P 25, by the company Wacker under the name Transparent Titanium Oxide PW®, by the company Miyoshi Kasei under the name UFTR®, by the company Tomen under the name ITS® and by the company Tioxide under the name Tioveil AQ.

[0073] Uncoated zinc oxide pigments are, for example: - those sold under the name Z-Cote by the company Sunsmart; - those sold under the name Nanox® by the company Elementis; - those sold under the name Nanogard WCD 2025® by the company Nanophase Technologies; Coated zinc oxide pigments are, for example: - those sold under the name Zinc Oxide CS-5 by the company Toshibi (ZnO coated with polymethylhydrogensiloxane); - those sold under the name Nanogard Zinc Oxide FN® by the company Nanophase Technologies (as a 40% dispersion in Finsolv TN®, C12-C15 alkyl benzoate); - those sold under the name Daitopersion Zn-30 and Daitopersion Zn-50® by Daito (dispersions in oxyethylenated cyclopolymethylsiloxane/polydimethylsiloxane containing 30% or 50% zinc oxides coated with silica and polymethylhydrogensiloxane); - those sold under the name NFD Ultrafine ZnO® by the company Daikin (ZnO coated with perfluoroalkyl phosphate and perfluoroalkylethyl-based copolymer as a dispersion in cyclopentasiloxane); - those sold under the name SPD-Z1® by the company Shin-Etsu (ZnO coated with acrylic polymer grafted with silicone, dispersed in cyclodimethylsiloxane); - those sold under the name Escalol Z100® by the company ISP (ZnO treated with alumina dispersed in a mixture of ethylhexyl methoxycinnamate and PVP/methicone hexadecene copolymer); - those sold under the name Fuji ZnO-SMS-10® by the company Fuji Pigment (ZnO coated with silica and polymethylsilsesquioxane); and - those sold under the name Nanox Gel TN® by the company Elementis (ZnO dispersed at a concentration of 55% in C12-C15 alkyl benzoate with hydroxystearic acid polycondensate).

[0074] Uncoated cerium oxide pigments can, for example, be those sold under the name Colloidal Cerium Oxide® by the company Rhône-Poulenc.

[0075] Uncoated iron oxide pigments are sold, for example, by the company Arnaud under the names Nanogard WCD 2002® (FE 45B®), Nanogard Iron FE 45 BL AQ, Nanogard FE 45R AQ® and Nanogard WCD 2006® (FE 45R®) or by the Mitsubishi company under the name TY-220®.

[0076] Coated iron oxide pigments are sold, for example, by the company Arnaud under the names Nanogard WCD 2008 (FE 45B FN®), Nanogard WCD 2009® (FE 45B 556®), Nanogard FE 45 BL 345® and Nanogard FE 45 BL® or by the company BASF under the name Transparent Iron Oxide®.

[0077] Mention may also be made of mixtures of metal oxides, especially titanium dioxide and cerium dioxide, which include the equal weight mixture of titanium dioxide and cerium dioxide coated with silica, sold by the company Ikeda under the name Sunveil A®, and also the mixture of titanium dioxide and zinc dioxide coated with alumina, silica and silicone, such as the product M 261® sold by the company Sachtleben Pigments, or coated with alumina, silica and glycerol, such such as the product M 211® sold by the company Sachtleben Pigments.

[0078] According to the invention, coated or uncoated titanium oxide pigments are particularly preferred.

[0079] The UV filter agents according to the invention are generally present in the composition according to the invention in a content in the range of 0.1% to 45% by weight and in particular from 1% to 30% by weight. % by weight in relation to the total weight of the composition.

[0080] The composition, according to the invention, is in the form of an emulsion and can be prepared according to normal methods.

[0081] According to a particular embodiment, the composition, according to the invention, is in the form of an oil-in-water emulsion (direct emulsion) comprising a continuous aqueous phase and an oily phase dispersed in said aqueous phase.

[0082] According to another particular embodiment, the composition, according to the invention, is in the form of a water-in-oil emulsion (inverse emulsion) comprising a continuous oily phase and an aqueous phase dispersed in said oily phase.

[0083] Preferably, the composition according to the invention is in the form of an oil-in-water emulsion.

[0084] This emulsion can have a texture ranging from fluid to thick. It may, for example, have a viscosity at room temperature (25 °C) that varies within a very wide range, for example, a viscosity in the range of approximately 0.1 to 50 Pa.s (1 to 500 poises), and preferably approximately 0.2 to 1 Pa.s (2 to 10 poises). Viscosity measurement is generally carried out at 25 °C, using a Rheomat RM180® viscometer equipped with spindle no. 1, 2, 3 or 4 depending on the viscosity range, with the measurement being carried out after 10 minutes of spindle rotation in the composition (after this time stabilization of viscosity and spindle rotation speed are observed), at a shear rate of 200 s-1.

GREASE PHASE

[0085] The composition, according to the invention, comprises at least one grease phase.

[0086] The proportion of the grease phase can be in the range, for example, from 1% to 80% by weight, preferably from 5% to 40% by weight, with respect to the total weight of the composition.

[0087] For the purpose of the invention, the grease phase includes any fatty substance that is liquid at room temperature and atmospheric pressure, generally oils, or which is solid at room temperature and atmospheric pressure, such as pasty compounds or waxes.

[0088] For the purpose of the present invention, the term “pasty compound” shall mean a compound that is miscible in water and that undergoes a reversible solid/liquid state change and that comprises in the solid state an anisotropic crystal organization, and comprises, at a temperature of 23 °C, a liquid fraction and a solid fraction.

[0089] For the purpose of the present invention, the term “wax” is understood to mean a lipophilic compound, which is solid at room temperature (25 °C), with a reversible solid/liquid state change, which has a melting point greater than or equal to 30 °C which can be up to 120 °C.

[0090] The melting point of the wax can be measured using a differential scanning calorimeter (D.S.C.), for example, the calorimeter sold under the name DSC 30 by the company Mettler. Preferably, the measurement protocol is as follows: - A sample of 5 mg of wax placed in a crucible is subjected to a first temperature rise from -20 °C to 100 °C, at a heating rate of 10 °C/minute, it is then cooled from 100 °C to -20 °C at a cooling rate of 10 °C/minute and is finally subjected to a second temperature rise that passes from -20 °C to 100 °C at a heating rate of 5 °C/minute. During the second temperature rise, the change in the difference in power absorbed by the empty crucible and the crucible containing the wax sample is measured as a function of temperature. The melting point of the compound is the temperature value that corresponds to the top of the peak of the curve that represents the variation in the difference in absorbed power as a function of temperature.

[0091] Through pasty compounds, mention can be made of synthetic fatty substances and fatty substances of vegetable origin. The latter can be obtained through the synthesis of starting materials of plant origin.

[0092] The solid fatty substance is advantageously chosen from: - lanolin and derivatives thereof, - polyol ethers chosen from pentaerythrityl ethers of a polyalkylene glycol, fatty alkyl ethers of a sugar, and mixtures thereof, pentaerythrityl ether being of polyethylene glycol comprises 5 oxyethylene units (5 OE) (CTFA name: PEG-5 Pentaerythrityl Ether), polypropylene glycol pentaerythrityl ether comprises 5 oxypropylene units (5 OP) (CTFA name: PEG-5 Pentaerythrityl Ether ), and mixtures thereof, and most especially PEG-5 Pentaerythrityl Ether, PPG-5 Pentaerythrityl Ether and soybean oil mixture sold under the name Lanolide by Vevy, which is a mixture in which the constituents are in a 46/46/8 weight ratio: 46% PPG-5 pentaerythrityl ether, 46% PPG-5 pentaerythrityl ether and 8% soybean oil, - polymeric or non-polymeric silicone compounds, - compounds fluorinated polymeric or non-polymeric compounds, - vinyl polymers, especially: - olefin homopolymers and copolymers, - homopolymers and copolymers of hydrogenated diene, - linear or branched homo- or copolymer oligomers of alkyl (meth)acrylates which preferably have a group C8-C30 alkyl, - homopolymer and copolymer oligomers of vinyl esters that bear C8-C30 alkyl groups, - homo and copolymer oligomers of vinyl ethers that have C8-C30 alkyl groups, - fat-soluble polyethers that result from polyetherification between one or more C2-C100 and preferably C2-C50 diols. - esters, - and/or mixtures thereof.

[0093] The solid grease substance may be a polymer, in particular a hydrocarbon-based polymer.

[0094] Among the lipid-soluble polyethers that are particularly preferred are copolymers of ethylene oxide and/or propylene oxide with long-chain C6-C30 alkylene oxides, more preferably such that the weight ratio of ethylene oxide and/or or propylene oxide with alkylene oxides in the copolymer is 5:95 to 70:30. In this family, mention will be made especially of copolymers, such as long-chain alkylene oxides arranged in blocks having an average molecular weight of 1,000 to 10,000, for example, a polyoxyethylene/polydodecyl glycol block copolymer, such as dodecanediol ethers ( 22 mol) and polyethylene glycol (45 OE) sold under the trade name Elfacos ST9 by AkzoNobel.

[0095] Among the esters, the following are especially preferred: - esters of a glycerol oligomer, especially diglycerol esters, in particular adipic acid and glycerol condensates, for which some of the hydroxyl groups of the glycerols have reacted with a mixture of fatty acids, such as stearic acid, capric acid and isostearic acid, and 12-hydroxystearic acid, especially such as those sold under the trade name Softisan 649 by the company Sasol, - arachidyl propionate sold under the trade name Waxenol 801 by Alzo, - phytosterol esters, - fatty acid triglycerides and derivatives thereof, - pentaerythrityl esters, - esters of a diol dimer and a diacid dimer, where appropriate esterified in their function (or functions) of free alcohol or acid with acid or alcohol radicals, especially dilinoleate dimer esters; such esters can be chosen especially from among the esters that have the following INCI nomenclature: bis-behenyl/isostearyl/phytosteryl dimer dilinoleyl dilinoleate (Plandool G), phytosteryl isostearyl dimer dilinoleate (Lusplan PI-DA, Lusplan PHY/IS-DA), phytosteryl/isostearyl/cetyl/stearyl/beenyl dimer dilinoleate (Plandool H or Plandool S), and mixtures thereof, - hydrogenated soybean oil, hydrogenated coconut oil, hydrogenated rapeseed oil, mixtures of hydrogenated vegetable oils, such as the mixture of hydrogenated soybean, coconut, palm and rapeseed vegetable oil, for example the mixture sold under the reference Akogel® by the company AarhusKarlshamn (INCI name: Hydrogenated Vegetable Oil), - shea butter, in particular that product has the name INCI Butter Butyrospermum parkii, just like the product sold under the name Sheasoft® by the company AarhusKarlshamn, - cocoa butter, in particular the product that is sold under the name CT Cocoa Butter Deodorized by the company Dutch Cocoa BV or the product which is sold under the name Beurre De Cacao NCB HD703 758 by the company Barry Callebaut, - shorea butter, in particular the product which is sold under the name Dub Shorea T by the company Stéarineries Dubois, - and mixtures thereof.

[0096] According to one embodiment, the composition may comprise from 0.5 to 30% by weight of pasty compounds with respect to the total weight of the composition.

[0097] The waxes that can be used in a composition, according to the invention, are chosen from waxes that are solid at room temperature, of animal, vegetable, mineral or synthetic origin, and mixtures thereof. They can be hydrocarbon, fluoro and/or silicone-based waxes.

[0098] Examples that may be especially mentioned include hydrocarbon-based waxes, such as natural beeswax (or bleached beeswax), synthetic beeswax, carnauba wax, rice bran wax, such as the product sold under reference NC 1720 by the company Cera Rica Noda, candelilla wax, such as the product sold under reference SP 75 G by the company Strahl & Pitsch, microcrystalline waxes, for example microcrystalline waxes of which the melting point is above 85 °C, such as the HI-MIC® 1070, 1080, 1090 and 3080 products sold by the company Nippon Seiro, ceresins or ozokerites, for example, isoparaffins whose melting point is below 40 °C, such as the product EMW-0003 sold by Nippon Seiro, α-olefin oligomers such as Performa V® polymers 825, 103 and 260 sold by New Phase Technologies; ethylene and propylene copolymers, such as Performalene® EP 700, polyethylene waxes (which preferably have a molecular weight between 400 and 600), Fischer-Tropsch waxes.

[0099] Other solid fatty substances that may be present in the grease phase are, for example, fatty acids comprising from 8 to 30 carbon atoms, for example, stearic acid, lauric acid or palmitic acid; fatty alcohols comprising 8 to 30 carbon atoms, for example stearyl alcohol or cetyl alcohol and mixtures thereof (cetearyl alcohol).

[0100] According to one embodiment, the composition may comprise 0.5% (instead of 0.2%) to 20% by weight of wax with respect to the total weight of the composition.

[0101] The grease phase of the composition, according to the invention, may also comprise at least one oil. The oil (or oils) present in the composition may be volatile or non-volatile.

[0102] The term “oil” shall mean any fatty substance that is in liquid form at room temperature (25 °C) and at atmospheric pressure.

[0103] Volatile or non-volatile oils can be hydrocarbon-based oils, especially of animal or vegetable origin, synthetic oils, silicone oils or fluoro oils, or mixtures thereof.

[0104] For the purpose of the present invention, the term “silicone oil” should mean an oil that comprises at least one silicon atom and especially at least one Si-O group.

[0105] The term “hydrocarbon-based oil” should mean an oil that contains mainly hydrogen and carbon atoms and possibly oxygen, nitrogen, sulfur and/or phosphorus atoms.

[0106] The term “fluoro oil” should mean an oil that comprises at least one fluorine atom and especially at least one perfluorinated chain.

NON-VOLATILE OILS

[0107] For the purpose of the present invention, the term “non-volatile oil” is understood to mean an oil with a vapor pressure of less than 0.13 Pa (0.01 mmHg).

[0108] Non-volatile oils can be chosen especially from non-volatile hydrocarbon-based oils, which can be fluorinated and/or silicone oils.

[0109] As non-volatile hydrocarbon-based oils that are suitable for use in the invention, mention may be made especially of: - hydrocarbon-based oils of animal origin, - hydrocarbon-based oils of vegetable origin, such as esters of phytostearyl, such as phytostearyl oleate, phytostearyl isostearate and lauroyl/octyldodecyl/phytostearyl glutamate, for example, sold under the name Eldew PS203 by Ajinomoto, triglycerides consisting of fatty acid esters of glycerol, the fatty acids thereof may have lengths chain in the range of C4 to C24, and these chains are possibly linear or branched, and saturated or unsaturated; These oils are especially heptanoic or octanoic triglycerides, wheat germ oil, sunflower oil, grape seed oil, sesame oil, corn oil, apricot oil, castor oil, shea oil, avocado oil, olive oil, soybean oil, sweet almond oil, palm oil, rapeseed oil, cottonseed oil, hazelnut oil, macadamia oil, jojoba oil, alfalfa oil, poppy oil, pumpkin oil, sesame oil, cucumber oil, blackcurrant oil, evening primrose oil, millet oil, barley oil, quinoa oil, rye oil, safflower oil, walnut oil, passionflower oil and rosehip oil; shea butter; or alternatively caprylic/capric acid triglycerides, for example those sold by Stéarineries Dubois or those sold under the names Miglyol 810®, 812® and 818® by Dynamit Nobel; refined vegetable perhydrosqualene sold under the name Fitoderm by Cognis; - hydrocarbon-based oils of mineral or synthetic origin, for example: - synthetic ethers that have 10 to 40 carbon atoms; - linear or branched hydrocarbons of mineral or synthetic origin, such as petroleum jelly, polydecenes, hydrogenated polyisobutene, such as Parleam and squalane, and mixtures thereof, and in particular hydrogenated polyisobutene; and • synthetic esters, such as oils of Formula R1COOR2, wherein R1 represents the residue of a linear or branched fatty acid comprising from 1 to 40 carbon atoms and R2 represents a specially branched hydrocarbon-based chain containing from 1 to 40 carbon atoms, as long as Ri + R2 is ≥ 10.

[0110] Esters can be chosen, in particular, from among esters, in particular fatty acid esters, for example: ϖ cetostearyl octanoate, isopropyl alcohol esters, such as isopropyl myristate, isopropyl palmitate, ethyl palmitate, palmitate 2-ethylhexyl, isopropyl stearate, isopropyl isostearate, isostearyl isostearate, octyl stearate, hydroxylated esters, e.g. isostearyl lactate, octyl hydroxystearate, diisopropyl adipate, heptanoates and in particular isostearyl heptanoate , alcohol or polyalcohol octanoates, decanoates or ricinoleates, for example, propylene glycol dioctanoate, cetyl octanoate, tridecyl octanoate, 2-ethylhexyl 4-diheptanoate, 2-ethylhexyl palmitate, alkyl benzoate, polyethylene glycol diheptanoate, propylene glycol 2-diethylhexanoate, and mixtures thereof, C12-C15 alcohol benzoates, hexyl laurate, esters of neopentanoic acid, for example, isodecyl neopentanoate, isotridecyl neopentanoate, isostearyl neopentanoate, octyldodecyl neopentanoate, isononanoic acid esters, for example, isononyl isononanoate, isotridecyl isononanoate, octyl isononanoate, hydroxylated esters, for example, isostearyl lactate and diisostearyl malate; ϖ polyol esters and pentaerythrityl esters, for example dipentaerythrityl tetrahydroxystearate/tetraisostearate; ϖ esters of diol dimers and diacid dimers, such as Lusplan DD-DA5® and Lusplan DD-DA7® sold by Nippon Fine Chemical and described in patent application No. FR 0302809, • fatty alcohols that are liquids at room temperature ambient, with a branched and/or unsaturated carbon-based chain containing from 12 to 26 carbon atoms, for example, 2-octyldodecanol, isostearyl alcohol, oleyl alcohol, 2-hexyldecanol, 2-butyloctanol and 2-undecylptadecanol; • higher fatty acids, such as oleic acid, linoleic acid or linolenic acid, and mixtures thereof; • dialkyl carbonates, where the two alkyl chains are possibly identical or different, such as dicaprylyl carbonate sold under the name Cetiol CC® by Cognis; • non-volatile silicone oils, for example, non-volatile polydimethylsiloxanes (PDMSs), polydimethylsiloxanes comprising alkyl or alkoxy groups that are at the side and/or end of a silicone chain, such groups each containing 2 to 24 carbon atoms, phenyl silicones, for example, phenyl trimethicones, phenyl dimethicones, phenyltrimethylsiloxydiphenylsiloxanes, diphenyl dimethicones, diphenylmethyldiphenyltrisiloxanes and 2-phenylethyl trimethylsiloxysilicates and dimethicones or phenyl trimethicones with a viscosity less than or equal to 100 cm2/s (cSt), and mixtures thereof; - and mixtures thereof.

VOLATILE OILS

[0111] For the purpose of the present invention, “volatile oil” shall mean an oil (or non-aqueous medium) that has the capacity to evaporate during contact with the skin in less than one hour, at room temperature and atmospheric pressure. Volatile oil is a volatile cosmetic oil, which is liquid at room temperature having, in particular, a non-zero vapor pressure, at room temperature and atmospheric pressure which has, in particular, a vapor pressure in the range from 0.13 Pa to 40,000 Pa (10-3 to 300 mmHg), in particular in the range of 1.3 Pa to 13,000 Pa (0.01 to 100 mmHg) and more particularly in the range of 1.3 Pa to 1,300 Pa (0.01 to 10 mmHg).

[0112] Volatile hydrocarbon-based oils can be chosen from hydrocarbon-based oils that contain 8 to 16 carbon atoms.

[0113] The term “hydrocarbon-based oil” is understood to mean an oil formed essentially of, or even consisting of, carbon and hydrogen atoms, and possibly oxygen, nitrogen, sulfur and/or phosphorus atoms, and which does not contain silicon or fluorine atoms; it may contain ester, ether, amine or amide groups.

[0114] The hydrocarbon-based volatile oil (or oils) can, in particular, be chosen from volatile branched esters, volatile branched alkanes, volatile linear alkanes, and mixtures thereof.

[0115] The compositions, according to the invention, may comprise one or more C8-C16 branched esters, such as isohexyl neopentanoate, isoamyl esters, such as isoamyl laurate, or even isononyl isononanoate.

[0116] The composition, according to the invention, may contain one or more volatile branched alkanes. The expression “one or more volatile branched alkanes” shall mean, without preference, “one or more volatile branched alkane oils”.

[0117] As volatile branched alkanes, mention may be made particularly of C8-C16 branched alkanes, such as C8-C16 isoalkanes (also known as isoparaffins), isododecane (also known as 2,2,4,4,6- pentamethylheptane), isodecane, isohexadecane and, for example, the oils sold under the trade names Isopar® by ExxonMobil or Permethyl® by Presperse. Preferably, the volatile hydrocarbon-based oil containing 8 to 16 carbon atoms is chosen from isododecane, isodecane and isohexadecane, and mixtures thereof, and is, in particular, isododecane.

[0118] The composition, according to the invention, may contain one or more volatile linear alkanes. The term “one or more volatile linear alkanes” shall mean, without preference, “one or more volatile linear alkane oils”.

[0119] A volatile linear alkane that is suitable for the invention is liquid at room temperature (about 25 °C) and atmospheric pressure (101 kpa (760 mmHg)).

[0120] A “volatile linear alkane” that is suitable for the invention should mean a cosmetic linear alkane, which has the ability to evaporate during contact with the skin in less than an hour, at room temperature (25 ° C) and pressure atmospheric pressure (760 mmHg, i.e. 101,325 Pa), which is liquid at room temperature, which in particular has an evaporation rate in the range of 0.01 to 15 mg/cm2/min at room temperature (25 °C) and atmospheric pressure 101 kpa (760 mmHg).

[0121] Preferably, the “volatile linear alkanes” that are suitable for the invention have an evaporation rate in the range of 0.01 to 3.5 mg/cm2/min, at room temperature (25 °C) and pressure atmospheric 101 kpa (760 mmHg).

[0122] Preferably, the “volatile linear alkanes” that are suitable for the invention have an evaporation rate in the range of 0.01 to 1.5 mg/cm2/min, at room temperature (25 °C) and pressure atmospheric 101 kpa (760 mmHg).

[0123] More preferably, the “volatile linear alkanes” that are suitable for the invention have an evaporation rate in the range of 0.01 to 0.8 mg/cm2/min, at room temperature (25 °C) and atmospheric pressure 101 kpa (760 mmHg).

[0124] Even more preferably, the “volatile linear alkanes” that are suitable for the invention have an evaporation rate in the range of 0.01 to 0.3 mg/cm2/min, at room temperature (25 °C) and atmospheric pressure 101 kpa (760 mmHg).

[0125] Even more preferably, the “volatile linear alkanes” that are suitable for the invention have an evaporation rate in the range of 0.01 to 0.12 mg/cm2/min, at room temperature (25 °C) and atmospheric pressure 101 kpa (760 mmHg).

[0126] The evaporation rate of a volatile alkane, according to the invention, (and more generally of a volatile solvent) can, in particular, be evaluated by means of the protocol described in document No. WO 06/013413, and more particularly through the protocol described below.

[0127] 15 g of volatile hydrocarbon-based solvent is placed in a crystallization dish (diameter: 7 cm) placed on a balance that is in a chamber of about 0.3 m3 that is temperature regulated (25 °C) and regulated hygrometry (50% relative humidity).

[0128] The liquid is left to evaporate freely, without agitating it, while ventilation is provided by means of a fan (Papst-Morten, reference 8550 N, which rotates at 2,700 rpm) placed vertically above the crystallization dish containing the volatile hydrocarbon-based solvent, with the blades being directed in relation to the crystallization dish, at a distance of 20 cm in relation to the bottom of the crystallization dish.

[0129] The weight of volatile hydrocarbon-based solvent remaining in the crystallization dish is measured at regular time intervals.

[0130] The solvent evaporation profile is then obtained by plotting the curve of the amount of evaporated product (in mg/cm2) as a function of time (in min).

[0131] The evaporation rate is then calculated, which corresponds to the tangent to the origin of the curve obtained. Evaporation rates are expressed in mg of volatile solvent evaporated per unit surface area (cm2) and per unit time (minute).

[0132] According to a preferred embodiment, "volatile linear alkanes" that are suitable for the invention have a non-zero vapor pressure (also known as saturation vapor pressure), at ambient temperature, in particular a vapor pressure in the range of 0.3 Pa to 6,000 Pa.

[0133] Preferably, the “volatile linear alkanes” that are suitable for the invention have a vapor pressure in the range of 0.3 to 2,000 Pa, at room temperature (25 °C).

[0134] Preferably, the “volatile linear alkanes” that are suitable for the invention have a vapor pressure in the range of 0.3 to 1000 Pa, at room temperature (25 °C).

[0135] More preferably, the “volatile linear alkanes” that are suitable for the invention have a vapor pressure in the range of 0.4 to 600 Pa, at room temperature (25 °C).

[0136] Preferably, the “volatile linear alkanes” that are suitable for the invention have a vapor pressure in the range of 1 to 200 Pa, at room temperature (25 °C).

[0137] More preferably, the “volatile linear alkanes” that are suitable for the invention have a vapor pressure in the range of 3 to 60 Pa, at room temperature (25 °C).

[0138] According to one embodiment, a volatile linear alkane that is suitable for use in the invention may have a sealing point that is within the range of 30 to 120 °C and more particularly of 40 to 100 °C. The waterproofing point is measured, in particular, according to the ISO 3679 standard.

[0139] According to one embodiment, an alkane that is suitable for use in the invention may be a volatile linear alkane comprising 8 to 16 carbon atoms.

[0140] According to an advantageous embodiment, the “volatile linear alkanes” that are suitable for use in the invention have an evaporation rate, as defined above, in the range of 0.01 to 3.5 mg/cm2/minute, in ambient temperature (25 °C) and atmospheric pressure 101 kpa (760 mmHg), and comprise 8 to 16 carbon atoms.

[0141] A volatile linear alkane that is suitable for the invention can advantageously be of vegetable origin.

[0142] Such an alkane can be obtained, directly or in several stages, from a vegetable raw material, such as an oil, a butter, a wax, etc.

[0143] As examples of alkanes that are suitable for use in the invention, mention can be made of the alkanes described in patent applications No. WO 2007/068371 or WO 2008/155059 by the company Cognis (mixtures of different alkanes that differ in at least minus one carbon). These alkanes are obtained from fatty alcohols, which are themselves obtained from coconut or palm kernel oil.

[0144] As examples of linear alkanes that are suitable for use in the invention, mention may be made of n-octane (C8), n-nonane (C9), n-decane (C10), n-undecane (C11), n -dodecane (C12), n-tridecane (C13), n-tetradecane (C14), n-hexadecane (C16) and mixtures thereof. According to a particular embodiment, the volatile linear alkane is chosen from n-nonane, n-undecane, n-dodecane, n-tridecane and n-tetradecane, and mixtures thereof.

[0145] The volatile linear alkane can be used alone.

[0146] Alternatively or preferably, a mixture of at least two different volatile linear alkanes, which differ from each other by a carbon number n of at least 1, in particular which differ from each other by a carbon number of 1 or 2, can be used.

[0147] According to a first embodiment, a mixture of at least two different volatile linear alkanes comprising 10 to 16 carbon atoms and differing from each other by a carbon number of at least 1 can be used. By way of examples, mention can be made especially of mixtures of volatile linear alkanes C10/C11, C11/C12 and C12/C13.

[0148] According to another embodiment, a mixture of at least two different volatile linear alkanes comprising 10 to 16 carbon atoms and differing from each other by a carbon number of at least 2 is used. By way of examples, mention can be made, in particular, of the volatile linear alkane mixtures C10/C12, and C12/C14, for an even number of carbons n and the mixture C11/C13 for an odd number of carbons n.

[0149] According to a preferred embodiment, a mixture of at least two different volatile linear alkanes comprising from 10 to 16 carbon atoms and which differ from each other by a carbon number of at least 2 and, in particular, a mixture of volatile linear C11/C13 alkanes or a mixture of volatile linear C12/C14 alkanes is used.

[0150] Other mixtures that combine more than two volatile linear alkanes, according to the invention, for example, a mixture of at least three different volatile linear alkanes that comprise from 8 to 16 carbon atoms and that differ from each other by a carbon number of at least 1, are also part of the invention, however, mixtures of two linear volatile alkanes, according to the invention, are preferred (binary mixtures), with said two linear volatile alkanes preferably representing more of 95% and better still more than 99% by weight of the total content of volatile linear alkanes in the mixture. According to a particular embodiment of the invention, in a mixture of volatile linear alkanes, the volatile linear alkane having the lowest number of carbons is predominant in the mixture.

[0151] According to another embodiment of the invention, a mixture of volatile linear alkanes in which the volatile linear alkane having the highest number of carbons is predominant in the mixture is used.

[0152] As examples of mixtures that are suitable for the invention, mention may be made, in particular, of the following mixtures: - from 50% to 90% by weight, preferably from 55% to 80% by weight and more preferably from 60 % to 75% by weight of volatile linear Cn alkane with n in the range of 8 to 16, - from 10% to 50% by weight, preferably from 20% to 45% by weight and preferably from 24% to 40% by weight of Cn+x volatile linear alkane with x greater than or equal to 1, preferably x = 1 or x = 2, with n+x between 8 and 16, and with respect to the total weight of the alkanes in said mixture.

[0153] In particular, said mixture of alkanes according to the invention contains: - less than 2% by weight and preferably less than 1% by weight of branched hydrocarbons, - and/or less than 2% by weight and preferably less of 1% by weight of aromatic hydrocarbons, and - and/or less than 2% by weight, preferably less than 1% by weight and preferably less than 0.1% by weight of unsaturated hydrocarbons in the mixture.

[0154] More particularly, a volatile linear alkane that is suitable for use in the invention can be used in the form of an n-undecane/n-tridecane mixture.

[0155] In particular, use will be made of a mixture of volatile linear alkanes comprising: - from 55% to 80% by weight and preferably from 60% to 75% by weight of a volatile linear C11 alkane (n-undecane), - from 20% to 45% by weight and preferably from 24% to 40% by weight of a linear volatile C13 alkane (n-tridecane), and with respect to the total weight of the alkanes in said mixture.

[0156] According to a particular embodiment, the mixture of alkanes is a mixture of n-undecane/n-tridecane. In particular, such a mixture can be obtained according to Example 1 or Example 2 of document No. WO 2008/155059.

[0157] Through examples of volatile hydrocarbon-based oils that can be used in the invention, mention can be made of: - n-dodecane, such as that sold under the reference Parafol 12-97 by Sasol; - n-tetradecane, such as that sold under the reference Parafol 14-97 by Sasol; - a mixture of n-dodecane and n-tetradecane; - isododecane (C12), such as that sold by the company Ineos; - a mixture of branched alkanes C15-C16, for example, the one that is sold by the company SEPPIC under the name Emogreen L15; and - a mixture of linear and/or branched alkanes C13-C15, for example, that which is sold by the company SEPPIC under the name Emosmart L15.

[0158] Volatile oils that can also be used include volatile silicones, such as, for example, linear or cyclic volatile silicone oils, especially those having a viscosity of 8 x 10-6 m2/s (< 8 centistokes), and especially which have from 2 to 10 silicon atoms, in particular, from 2 to 7 silicon atoms, wherein these silicones optionally comprise alkyl or alkoxy groups having from 1 to 10 carbon atoms. As volatile silicone oils that can be used in the invention, mention can be made especially of dimethicones with a viscosity of 5 and 6 cm2/s (cSt), octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, heptamethylhexyltrisiloxane, heptamethyloctyltrisiloxane, hexamethyldisiloxane, octamethyltrisiloxane , decamethyltetrasiloxane and dodecamethylpentasiloxane, and mixtures thereof.

[0159] Fluorovolatile oils, such as nonafluoromethoxybutane or perfluoromethylcyclopentane, and mixtures thereof, can also be used.

[0160] It is also possible to use a mixture of the oils mentioned above.

[0161] The various fatty substances, as previously defined, can be chosen in a variety of ways by those skilled in the art, in order to prepare a composition that has the desired properties, for example, in terms of consistency or texture.

[0162] According to a particular embodiment of the invention, the grease phase of the composition comprises at least one oil. Preferably, the composition according to the invention comprises at least one oil chosen from hydrocarbon-based oils and silicone oils. Even more preferably, the composition according to the invention comprises at least one hydrocarbon-based volatile oil.

[0163] According to one embodiment, the composition comprises from 0.5% to 70% by weight of oil (or oils), with respect to the total weight of the composition.

AQUEOUS PHASE

[0164] The composition, according to the invention, comprises at least one aqueous phase.

[0165] The aqueous phase comprises at least water. According to the galenic form of the composition, the amount of aqueous phase can be in the range of 0.1% to 99% by weight, preferably from 0.5% to 98% by weight, even better from 30 to 95% by weight. and even better from 40 to 95% by weight with respect to the total weight of the composition.

[0166] The amount of water may represent all or a portion of the aqueous phase and is generally at least 30% by weight with respect to the total weight of the composition, preferably at least 50% by weight, even better at least 60% by weight.

[0167] The aqueous phase may comprise at least one organic solvent that is miscible with water at room temperature (25 ° C), for example, linear or branched monoalcohols that contain from 2 to 6 carbon atoms, such as ethanol, propanol, butanol, isopropanol, isobutanol, pentanol or hexanol; polyols especially containing from 2 to 20 carbon atoms, preferably from 2 to 6 carbon atoms, such as glycerin, propylene glycol, isoprene glycol, butylene glycol, pentylene glycol, hexylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, glycerol, sorbitol and mixtures thereof.

[0168] In a known manner, all compositions of the invention may comprise one or more of the adjuvants that are common in the fields of cosmetics and dermatology: additional surfactants (other than twin surfactants, as previously described), thickeners and/or hydrophilic gelling agents or lipophilic; humidifiers; emollients; hydrophilic or lipophilic active agents; free radical scavengers; kidnappers; antioxidants; preservatives; basifying or acidifying agents; fragrances; film forming agents; loads; and mixtures thereof.

[0169] The quantities of these various adjuvants are those conventionally used in the fields under consideration. In particular, the amounts of active agents vary according to the desired objective and are those conventionally used in the fields under consideration, for example from 0.1 to 20% and preferably from 0.5 to 10% by weight of the total weight of the composition. When the composition comprises additional surfactants, these are preferably present in the composition in a proportion of active material in the range of 0.1% to 30% by weight, and preferably from 0.2% to 20% by weight, with respect to the total weight. of the composition.

ACTIVE AGENTS

[0170] Examples without limitation of active agents that may be mentioned include ascorbic acid and derivatives thereof, such as 5,6-di-O-dimethylsilyl ascorbate (sold by the company Exsymol under the reference PRO-AA), the salt of dl-alpha-tocopheryl-2l-ascorbyl phosphate potassium (sold by the company Senju Pharmaceutical under the reference Sepivital EPC), magnesium ascorbyl phosphate, sodium ascorbyl phosphate (sold by the company Roche under the reference Stay-C 50) ; phloroglucinol; enzymes; and mixtures thereof. According to a preferred embodiment of the invention, use is made, among hydrophilic active agents sensitive to oxidation, of ascorbic acid. Ascorbic acid can be of any nature. Thus, it can be of natural origin in powder form or in the form of orange juice, preferably orange juice concentrate. It can also be of synthetic origin, preferably in powder form.

[0171] As other active agents that can be used in the composition of the invention, examples that can be mentioned include humectants, such as protein hydrolysates and polyols, for example glycerol, glycols, for example polyethylene glycols; natural extracts; anti-inflammatories; oligomeric proanthocyanidins; vitamins, such as vitamin A (retinol), vitamin E (tocopherol), vitamin B5 (panthenol), vitamin B3 (niacinamide), derivatives of these vitamins (especially esters) and mixtures thereof; urea; caffeine; depigmenting agents such as kojic acid, hydroquinone and caffeic acid; salicylic acid and derivatives thereof; alpha-hydroxy acids such as lactic acid and glycolic acid and derivatives thereof; retinoids, such as carotenoid derivatives and vitamin A; hydrocortisone; melatonin; extracts of algae, fungi, plants, yeast, bacteria; steroids; antibacterial active agents, such as 2,4,4'-trichloro-2'-hydroxydiphenyl ether (or triclosan), 3,4,4'-trichlorocarbanilide (or triclocarban) and the acids indicated above, and especially salicylic acid and derivatives of same; mattifying agents, e.g. fibers; tensioning agents; and mixtures thereof.

[0172] Without need to cite, those skilled in the art will take care to select the optional adjuvant (or adjuvants) added to the composition, according to the invention, so that the advantageous properties intrinsically associated with the composition, according to the invention, are not are, or are not, substantially negatively affected by the anticipated addition.

[0173] The compositions according to the invention may be, for example, in the form of a cream, a milk or a fluid product that can be sprayed.

[0174] The compositions according to the invention may be, in particular, in the form of a vaporizable emulsion applied to the skin or hair in the form of fine particles by means of pressurization devices. Devices according to the invention are well known to those skilled in the art and comprise non-aerosol pumps or "atomizers", aerosol containers comprising a propellant and aerosol pumps using compressed air as a propellant. These devices are described, in particular, in patent documents No. U.S. 4077441 and U.S. 4850517.

[0175] The compositions according to the invention that are packaged in aerosols according to the invention generally contain conventional propellants, for example, hydrofluoro compounds, dichlorodifluoromethane, difluoroethane, dimethyl ether, isobutane, n-butane, propane or trichlorofluoromethane. They are preferably present in amounts in the range of 15% to 50% by weight with respect to the total weight of the composition.

[0176] The compositions can also be impregnated into carriers, such as wipes, or can be packaged as lotions in a bottle with a reducing agent.

[0177] The following examples will allow the invention to be understood more clearly, without, however, being limiting in nature. The quantities indicated are percentages by weight of raw materials, unless otherwise stated. Compound names are given as INCI or chemical names.

EXAMPLES EXAMPLE OF LIPOPHILIC POLYMER SYNTHESIS

[0178] Determination of molecular weight through gel permeation chromatography (GPC): - The sample is prepared by preparing a solution of the polymer at 10 mg/ml in tetrahydrofuran. The sample is placed in an oven at 54°C for 10 minutes and then on an oscillating shaker for 60 minutes to aid dissolution. Upon visual inspection, the sample appears to be fully dissolved in the solvent.

[0179] The prepared sample was analyzed using two 300x7.5 mm polypore columns (manufactured by Agilent Technologies), a Waters 2695 chromatographic system, a tetrahydrofuran mobile phase and refractive index detection. The sample was filtered through a 0.45 μm nylon filter before being injected into the liquid chromatograph. The standards used for calibration are Agilent Technologies Easi Vial Narrow Polystyrene (PS) standards.

[0180] Polystyrene standards in the range of 2,520,000 to 162 daltons were used for calibration.

[0181] The system is equipped with a PSS SECcurity 1260 RI detector. The polystyrene calibration curve was used to determine the average molecular weight. The recording of the diagrams and the determination of the various molecular weights were carried out using the Win GPC Unichrom 81 program.

[0182] Determination of melting point through differential scanning calorimetry (or DSC): - This method describes the general procedure for determining the melting point of polymers through differential scanning calorimetry. This method is based on ASTM E791 and ASTM D 34182 standards and calibration through DSC is performed according to ASTM E 9672 standard.

COPOLYMER OF BEENYL ACRYLATE AND 2-HYDROXYETHYL ACRYLATE (POLYMER 1):

[0183] In a 4-neck flask equipped with a side blade mixer, an internal thermometer, two funnels, a reflux condenser and an extension for two other necks, 175 g of behenyl acrylate, 25 g of 2-hydroxyethyl acrylate and 0.4 g of 2,2'-azobis(2-methylbutyronitrile) (Akzo Nobel) were added, over a period of 60 minutes at 80 °C, in 40 g of isopropanol, with stirring, after removing the oxygen system by flushing nitrogen for 20 minutes. The mixture was stirred at 80 °C for 3 hours. The solvent was then removed by vacuum distillation, then 1 g of dilauryl peroxide was added and the reaction continued for 60 minutes at 110 °C. The step was repeated. The mixture was then cooled to 90 °C and a jet of demineralized water was added, then the mixture was stirred. The water was removed by vacuum distillation. Molecular weight: Mn = 7,300 g/mol, Mw = 21,000, Mw/Mn = 2.8 Melting point: 65 °C

FORMULATION EXAMPLES

[0184] The compositions described in the examples below were prepared according to the following procedure: 1- Prepare the oily phase by introducing the filtering agents into said oily phase.

[0185] Dissolve the filter agents by heating to 70 °C, add the phase-structuring fatty polymer and heat until the polymer has completely dissolved.

[0186] 2- Prepare the aqueous phase and add the twin surfactant, heat the phase to the same temperature as the grease phase.

[0187] 3- Emulsify the two phases together using a rotor/stator type mixer at 70 °C, then cool to 30 °C, and add the thickeners and alcohol.

[0188] For each composition, the viscosity was measured, then the sensorial aspect was evaluated during and after its application to the skin; the in vitro SPF value was also measured.

VISCOSITY MEASUREMENT

[0189] Viscosity measurement is generally carried out at 25 °C, using a Rheomat RM180® viscometer equipped with a No. 2 or 3 spindle, and the measurement is carried out after 10 minutes of rotation of the spindle in the composition (after this time viscosity stabilization is observed), at a shear rate of 200 s-1.

PROTOCOL TO ASSESS ADHESION AND OILNESS

[0190] Adhesion is evaluated by a panel of sensory experts consisting of 5 individuals. Each composition is applied to the forearm at a dose of 2 mg/cm2. The product was spread using circular movements until it had penetrated (approximately 30 seconds). Adhesion is assessed after 2 minutes of drying, applying the back of the hand to the treated area, according to a scale ranging from 1 to 15, in which 1 constitutes a reference that it is not too sticky or not too oily and 15 constitutes a reference that is too sticky or too oily.

SPF IN VITRO

[0191] The sun protection factor (SPF) is determined according to the “in vitro” method described by B. L. Diffey in J. Soc. Cosmet. Chem. 40, 127 to 133, (1989). Measurements were obtained using a UV-2000 spectrophotometer from the company Labsphere. Each composition is applied to a rough PMMA plate in the form of a uniform and equal deposit at a rate of 1.3 mg/cm2.

EXAMPLE 1 ACCORDING TO THE INVENTION: COMPOSITION IN THE FORM OF A DIRECT EMULSION.

[0192] The following composition was prepared:

[0193] Composition A, according to the present invention, has a good sun protection factor, while at the same time having good cosmetic properties, such as a non-greasy and non-sticky feel, while being, at the same time, stable, particularly from a physicochemical point of view.

COMPARATIVE EXAMPLE 2: COMPOSITIONS IN THE FORM OF DIRECT EMULSIONS

[0194] The following compositions are prepared.

[0195] The following results were obtained.

[0196] These results show that compositions B and C, according to the invention, which comprise a twin surfactant (Ceralution H from Sasol) make it possible to obtain a better sun protection factor than composition D, according to the prior art. , which comprises a surfactant that is not a twin surfactant and the same UV filter agent in the same concentration, while having a less sticky and less oily finish on the skin.

COMPARATIVE EXAMPLE 3: COMPOSITIONS IN THE FORM OF DIRECT EMULSIONS

[0197] The following compositions were prepared.

[0198] The following results were obtained.

[0199] These results show that composition E comprising a lipophilic polymer according to the invention (Polymer 1) makes it possible to obtain an SPF value in vitro much higher than that obtained with composition F, according to the prior art, which comprises another lipophilic polymer (Interlimer IPA 13-1 NG from Air Products and Chemicals) and the same UV filtering agent, in the same concentration, while at the same time having a less sticky finish on the skin.

Claims (20)

1. COMPOSITION IN THE FORM OF AN EMULSION, characterized by comprising at least one UV filter agent, at least one twin surfactant having the chemical formula below and also the stereoisomers thereof: where: a) R1 denotes an alkyl radical having 1 to 25 carbon atoms or a radical having the formula below: -(CH2)k1-CH[-NH-CO-(CH2)l-CH3]-( CH2)j1-Y' b) R3 denotes an alkyl radical having 1 to 25 carbon atoms or a radical having the Formula below: -(CH2)k2-CH[-NH-CO-(CH2)l-CH3 ]-(CH2)j2-Y' c) R2 denotes a spacer consisting of a linear or branched alkylene chain having 1 to 12 carbon atoms or a radical of Formula -CH(Y')-(CH2)n '-; wherein: d) represents an integer between 1 and 8, preferably between 3 and 5, and even more preferably equal to 4; Y' represents, independently of one another, a carboxylic acid group or an alkaline salt of a carboxylic acid group, such as a sodium salt of a carboxylic acid group; j1, k1, j2 and k2 represent an integer such that (j1, k1, j2, k2) = (2, 0, 2, 0), (2, 0, 0, 2), (0, 2, 2, 0) or (0, 2, 0, 2); el represents an integer from 6 to 16, preferably from 8 to 14, and more preferably from 10 to 12; and d) (OM)2, -C2H4-SO3M, -C3H6-SO3M or -CH2(CHOH)4CH2OH, where M and M' represent H or an alkali metal or alkaline earth metal or ammonia or alkanolammonium ion, • a is in the range from 0 to 15, • b is in the range 0 to 10, and • the sum of a + b is in the range 1 to 25; ee) n is in the range of 1 to 10; and at least one lipophilic polymer comprising monomeric units of Formulas (A) and (B): wherein: R, independently of one another, is chosen from alkyl or alkylene radicals; wherein at least 60% by weight of the R groups are behenyl radicals, with the percentage by weight referring to the sum of all R groups present in the polymer; the weight ratio of the sum of all hydroxyethyl acrylate units to the sum of all acrylate units bearing the R group is in the range of 1:30 to 1:1; and the sum of the total of units A and B is at least 95% by weight of the total weight of the polymer; with the polymer having a numerical average molecular weight Mn that is in the range of 2,000 to 9,000 g/mol. 2. COMPOSITION, according to claim 1, characterized in that the twin surfactant(s) are chosen from among the compounds of Formula (II), and also their stereoisomers: wherein: - R1 and R3 denote, independently of each other, an alkyl radical containing from 1 to 25 carbon atoms; - R2 denotes a spacer consisting of a linear or branched alkylene chain containing from 1 to 12 carbon atoms; - OM)2, -C2H4-SO3M, -C3H6-SO3M or -CH2(CHOH)4CH2OH, where M and M' represent H or an alkali metal or alkaline earth metal or ammonia or alkanolammonium ion, - a is in the range 0 to 15, - b is in the range 0 to 10, and - the sum of a + b is in the range 1 to 25; e - n is in the range of 1 to 10. 3. COMPOSITION, according to claim 2, characterized in that, for the twin surfactant of Formula (II), each of the groups R1-CO- and R3-CO- comprises 8 to 20 carbon atoms. 4. COMPOSITION, according to any one of claims 2 to 3, characterized in that, for the twin surfactant of Formula (II), each of the groups R1-CO- and R3-CO- denotes a coconut fatty acid residue. 5. COMPOSITION, according to any one of claims 2 to 4, characterized in that, for the twin surfactant of Formula (II), for each of the radicals X and Y, the sum of a and b has an average value in the range of 10 to 20. 6. COMPOSITION, according to any one of claims 2 to 5, characterized in that, for the twin surfactant of Formula (II), Y is the -SO3M group, where M is an alkali metal ion, such as a sodium. 7. COMPOSITION, according to any one of claims 2 to 6, characterized in that, for the twin surfactant of Formula (II), n is equal to 1. 8. COMPOSITION, according to any one of claims 2 to 7, characterized by the surfactant of Formula (II) having the following structure: 9. COMPOSITION, according to any one of claims 2 to 8, characterized in that the twin surfactant is mixed with (a) a glyceryl ester of a C6-C22 fatty acid, (b) a diester of a C6-C22 fatty acid and of citric acid and glycerol, and (c) a C10-C30 fatty alcohol. 10. COMPOSITION, according to claim 1, characterized in that the twin surfactant(s) are chosen from among the compounds of Formula (III), and also their stereoisomers: wherein: Y' represents, independently of one another, a carboxylic acid group or an alkaline salt of a carboxylic acid group, such as a sodium salt of a carboxylic acid group; j1, k1, j2 and k2 represent an integer such that (j1, k1, j2, k2) = (2, 0, 2, 0), (2, 0, 0, 2), (0, 2, 2, 0) or (0, 2, 0, 2); el represents an integer from 6 to 16, preferably from 8 to 14, and more preferably from 10 to 12. 11. COMPOSITION, according to claim 10, characterized in that, in Formula (III), l represents an integer in the range of 8 to 12, j1 = j2 = 0, and k1 = k2 = 2. 12. COMPOSITION, according to any one of claims 10 to 11, characterized in that, in Formula (III), Y' represents -COONa, j1 = j2 = 0, k1 = k2 = 2; and l = 10. 13. COMPOSITION, according to any one of claims 10 to 12, characterized in that the twin surfactant(s) of Formula (III) are chosen from sodium dilauramidoglutamide lysine, dimyristoylglutamide lysine sodium distearoylglutamide lysine and sodium distearoylglutamide lysine, preferably sodium dilauramidoglutamide lysine. 14. COMPOSITION, according to any one of claims 1 to 13, characterized in that, in the lipophilic polymer, R is constituted by alkyl radicals, preferably by C16-C22 alkyl radicals, and more preferably by behenyl radicals (C22). 15. COMPOSITION, according to any one of claims 1 to 14, characterized in that, in the lipophilic polymer, at least 70% by weight of the R groups are behenyl radicals, preferably at least 80% by weight, and more preferably at least 90% in weight. 16. COMPOSITION, according to any one of claims 1 to 15, characterized in that, in the lipophilic polymer, all R groups are behenyl radicals. 17. COMPOSITION, according to any one of claims 1 to 16, characterized by, in the lipophilic polymer, the weight ratio of the sum of all hydroxyethyl acrylate units to the sum of all acrylate units bearing the R group be in the range of 1:15 to 1:1, preferably in the range of 1:10 to 1:4. 18. COMPOSITION, according to any one of claims 1 to 17, characterized in that the lipophilic polymer has an average numerical molecular weight Mn in the range of 5,000 to 9,000 g/mol. 19. COMPOSITION, according to any one of claims 1 to 18, characterized in that the lipophilic polymer has a melting point in the range of 60 °C to 69 °C, and preferably in the range of 63 °C to 67 °C. 20. COMPOSITION, according to any one of claims 1 to 19, characterized in that the lipophilic polymer(s) are present in an amount of active material in the range of 0.1% to 10% by weight, preferably 0.1% to 3% by weight, relative to the total weight of the composition.