专利摘要:
The present invention relates to a cosmetic composition for the treatment of keratinous fibers, in particular human keratinous fibers such as the hair, comprising, in a cosmetically acceptable medium, one or more organosilanes, one or more cationic polymers having a higher charge density or equal to 4 meq / g and one or more cationic surfactants. The present invention also relates to a process for the cosmetic treatment of keratin fibers using said composition. The present invention finally relates to the use of said composition for the cosmetic treatment of keratinous fibers.
公开号:FR3029110A1
申请号:FR1461567
申请日:2014-11-27
公开日:2016-06-03
发明作者:Karima Jaouani;Nicolas Daubresse;Estelle Mathonneau;Audrey Correia
申请人:LOreal SA;
IPC主号:
专利说明:

[0001] The present invention relates to a cosmetic composition for the treatment of keratinous fibers, in particular human keratinous fibers such as the hair, comprising: in a cosmetically acceptable medium, one or more organosilanes, one or more cationic polymers having a charge density greater than or equal to 4 meq / g and one or more cationic surfactants. The present invention also relates to a process for the cosmetic treatment of keratin fibers using said composition. The present invention finally relates to the use of said composition for the cosmetic treatment of keratinous fibers. The hair is generally damaged and weakened by the action of external atmospheric agents such as light and weather, and by mechanical or chemical treatments such as brushing, combing, dyeing, discoloration, perms and / or straightening. Thus, in order to overcome these drawbacks, it is now customary to resort to hair care involving the use of care compositions that make it possible to condition the hair as a result of these treatments in order to give them, in particular, shine. softness, suppleness, lightness, a natural touch as well as disentangling properties. These hair care compositions may be for example conditioning shampoos or compositions to be applied before or after the shampoos, and which may be in the form of gels, hair lotions or more or less thick creams.
[0002] To improve the cosmetic properties of these compositions, it is known to introduce in the latter cosmetic agents known as conditioning agents intended primarily to repair or limit the adverse or undesirable effects induced by the various treatments or aggression that are suffered, more or less repeated, the hair fibers. For this purpose, it has already been proposed to use, inter alia, organic silicon compounds (or organosilanes) in cosmetic care compositions, to give the hair satisfactory conditioning properties. Such compositions are, for example, described in patent applications FR 2 910 276, EP 2 343 042 and EP 2 111 848. However, the care compositions described in the prior art provide conditioning and disentangling properties which do not last. not long enough in time. Indeed, these properties are generally not sufficiently resistant to washing and tend to decrease from the first shampoo. Furthermore, the compositions comprising organic silicon compounds often have the disadvantage of evolving substantially over time under normal storage conditions, particularly in terms of their viscosity and their visual appearance. This results in a visual appearance that can become cloudy and / or a less satisfactory texture, which can cause a decrease in the effectiveness of these compositions. Thus, there is a real need to provide a composition for the cosmetic care of keratinous fibers, in particular human keratinous fibers such as the hair, which do not have the disadvantages mentioned above, that is to say which is in particular able to provide conditioning properties not only satisfactory but also persistent after washing, for example remanent at least after 3 shampoos. These compositions must also remain stable over time.
[0003] The Applicant has surprisingly discovered that a composition, comprising one or more organic silicon compounds as defined below, one or more cationic polymers having a charge density greater than or equal to 4 meq / g and one or more several cationic surfactants, allowed to achieve the objectives outlined above. The subject of the present invention is therefore a cosmetic composition for the care of keratinous fibers, in particular human keratinous fibers such as the hair, comprising in a cosmetically acceptable medium: (i) one or more organosilanes, (ii) one or more polymers cationic agents having a charge density greater than or equal to 4 meq / g, and (iii) one or more cationic surfactants.
[0004] The subject of the present invention is also a process for the cosmetic treatment of keratin fibers in which the composition according to the invention is applied to said fibers. The present invention also relates to the use of said composition to give the hair a cosmetic care remanent to shampoos. The composition according to the invention provides a particularly satisfactory cladding of the hair, and in particular gives them softness, suppleness, smoothness, lightness, volume, and a natural non-greasy and non-laden feel. This composition also provides the hair with improved disentangling ability. Furthermore, the properties provided by the composition according to the invention are resistant to various attacks that may occur in the hair, such as light, weather, washing, perspiration. They are particularly persistent in shampoos, especially after at least 3 shampoos. The composition according to the invention is moreover stable over time. By "stable" in the sense of the present invention is meant that the visual appearance and the viscosity of these compositions do not change, or substantially not (generally less than 10% variation with respect to the viscosity at TO), during time in standard storage conditions, for example during the month or two months after their manufacture, at room temperature.
[0005] Other objects, features, aspects and advantages of the invention will emerge even more clearly on reading the description and examples which follow. In what follows, and unless otherwise indicated, the boundaries of a domain of values are included in this field, especially in the expressions "between" and "from ... to". In addition, the expressions "at least one" and "at least" used in the present description are respectively equivalent to the terms "one or more" and "greater than or equal to".
[0006] Organosilanes The composition according to the invention comprises one or more organosilanes, preferably chosen from compounds of formula (I) and / or their oligomers: Si (OR2), (R3) '(OH) y (I) in which - R 1 is a linear or branched, saturated or unsaturated, cyclic or acyclic, C 2 -C 22, especially C 2 to C 20, hydrocarbon chain which may be substituted with a group chosen from amine groups NH 2 or NHR (R being a linear or branched alkyl); C1 to C20, especially C1 to C6, or a C3 to C40 cycloalkyl or a C6 to C30 aromatic radical); the hydroxy group (OH); a thiol group; an aryl group (more particularly benzyl) optionally substituted with an NH 2 or NHR group; R1 may be interrupted by a heteroatom (O, S, NH) or a carbonyl group (CO); R 2 and R 3, which are identical or different, represent a linear or branched alkyl group comprising from 1 to 6 carbon atoms; y denotes an integer ranging from 0 to 3; z denotes an integer ranging from 0 to 3; and - x denotes an integer from 0 to 2, - with z + x + y = 3. By oligomer is meant the polymerization products of compounds of formula (I) having from 2 to 10 silicon atoms. Preferably, R 1 is a linear or branched hydrocarbon-based, saturated, C 1 -C 22, especially C 2 -C 12, preferably linear, which may be substituted by an amine group NH 2 or NHR (R = C 1 -C 20 alkyl, especially C 1 at C6).
[0007] Preferably, R2 represents an alkyl group comprising from 1 to 4 carbon atoms, more preferably a linear alkyl group comprising from 1 to 4 carbon atoms, and preferably the ethyl group. Preferably z varies from 1 to 3. Preferably, y = 0.
[0008] Preferentially z = 3, and therefore x = y = 0. In one embodiment of the invention, the organosilane (s) are chosen from the compounds of formula (I) in which R 1 represents a linear alkyl group comprising from 7 to 18 carbon atoms and more particularly from 7 to 12 carbon atoms. carbon or a C1 to C6 aminoalkyl group, preferably a C2 to C4 aminoalkyl group. More particularly, R 1 represents an octyl group. In another embodiment of the invention, the organosilane (s) are chosen from compounds of formula (I) in which R 1 is a linear or branched, saturated or unsaturated C 1 -C 22 hydrocarbon-based chain substituted with an amine group. NH2 or NHR (with R = C1 to C20 alkyl, especially C1 to C6, C3 to C40 cycloalkyl or C6 to C30 aromatic). In this variant, R1 preferably represents a C1 to C6 aminoalkyl group, and more preferably a C2 to C4 aminoalkyl group.
[0009] Preferably, the composition according to the invention comprises one or more organosilanes chosen from octyltriethoxysilane (OTES), dodecyltriethoxy silane, octadecyltriethoxysilane, hexadecyltriethoxysilane and 3-aminopropyl triethoxysilane (APTES); 2-aminoethyltriethoxysilane (AETES), 3-aminopropylmethyldiethoxysilane, N- (2-aminoethyl) -3-aminopropyltriethoxysilane, 3- (m-aminophenoxy) propyltrimethoxysilane, p-aminophenyltrimethoxysilane, N- (2-aminoethylaminomethyl) phenethyltrimethoxysilane, their oligomers and mixtures thereof; and more particularly chosen from 1-octyltriethoxy silane (OTES), 3-aminopropyltriethoxysilane (APTES), their oligomers and their mixtures. The organosilanes used in the composition of the invention, in particular those comprising a basic function, may be neutralized, partially or totally, in order to improve their solubility in water. In particular, the neutralizing agent may be chosen from organic or inorganic acids, such as citric acid, tartaric acid, lactic acid and hydrochloric acid.
[0010] Preferably, the organosilanes according to the invention, which are optionally neutralized, are soluble in water and in particular soluble at a concentration of 2% by weight, better at a concentration of 5% by weight and better still at a concentration of 10% by weight. weight in water at 25 ° C, and at atmospheric pressure (1 atm). By soluble is meant the formation of a single macroscopic phase. The content of the organosilane (s) present in the composition according to the invention may range from 0.1 to 15% by weight, preferably from 1 to 10% by weight, and more preferably from 2 to 8% by weight, relative to the total weight of the composition. The cationic polymers The composition according to the invention also comprises one or more cationic polymers having a charge density greater than or equal to 4 meq / g (milliequivalents per gram). Even more preferably, the cationic charge density is greater than or equal to 5 meq / g, more preferably 5 to 20 meq / g. The cationic charge density of a polymer corresponds to the number of moles of cationic charges per unit mass of polymer under the conditions where it is totally ionized. It can be determined by calculation if we know the structure of the polymer, that is to say the structure of the monomers constituting the polymer and their molar or weight proportion. It can also be determined experimentally by the Kjeldahl method. The cationic polymers having a cationic charge density greater than or equal to 4 meq / g, usable in accordance with the present invention, may be chosen from all those already known per se as improving the cosmetic properties of the hair treated with detergent compositions, namely especially those described in the patent application EP-A-0 337 354 and in the French patent applications FR-A-2 270 846, 2 383 660, 2 598 611, 2 470 596 and 2 519 863. In general, For the purposes of the present invention, the term "cationic polymer" denotes any polymer containing cationic groups and / or ionizable groups in cationic groups. The cationic polymers used in the present invention preferably have a number-average molecular weight greater than or equal to 50000 g / mol, and more preferably greater than or equal to 100000 g / mol. The cationic polymers used according to the present invention are advantageously chosen from those containing units containing primary, secondary, tertiary and / or quaternary amine groups that may either be part of the main polymer chain or may be carried by a lateral substituent directly connected to it. More particularly, the cationic polymers present in the composition according to the present invention are chosen from polymers such as polyamine, polyaminoamide and quaternary polyammonium polymers, polyalkyleneimines and their mixtures. The polymers of the polyamine, polyaminoamide or quaternary polyammonium type that can be used in accordance with the present invention, which can be mentioned in particular, are those described in French Pat. Nos. 2,505,348 or 2,542,997. Among these polymers, mention may be made of: ) vinylpyrrolidone / quaternized or non-quaternized dialkylaminoalkyl (meth) acrylate copolymers, (2) polymers consisting of piperazinyl units and divalent straight or branched chain alkylene or hydroxyalkylene groups, optionally interrupted by oxygen, sulfur or , nitrogen or by aromatic or heterocyclic rings, as well as the products of oxidation and / or quaternization of these polymers.
[0011] Such polymers are in particular described in French Patents 2 162 025 and 2 280 361; (3) water-soluble polyaminoamides prepared in particular by polycondensation of an acidic compound with a polyamine; these polyaminoamides may be crosslinked by an epihalohydrin, a diepoxide, a dianhydride, an unsaturated dianhydride, a bis-unsaturated derivative, a bis-halohydrin, a bis-azetidinium, a bis-haloacyldiamine, a bis-alkyl halide or else by an oligomer resulting from the reaction of a bifunctional compound reactive with a bis-halohydrin, a bis-azetidinium, a bis-haloacyldiamine, a bis-alkyl halide, a epilhalohydrin, diepoxide or bis-unsaturated derivative; the crosslinking agent being used in proportions ranging from 0.025 to 0.35 moles per amine group of the polymaoamide; these polyaminoamides can be alkylated or if they comprise one or more tertiary amine functional groups, quaternized. Such polymers are described in particular in French Patents 2,252,840 and 2,368,508; (4) polyamino amide derivatives resulting from the condensation of polyalkylene polyamines with polycarboxylic acids followed by alkylation with difunctional agents. Mention may be made, for example, of the adipic acid / diakylaminohydroxyalkyl-dialkylenetriamine polymers in which the alkyl group contains from 1 to 4 carbon atoms and preferably denotes methyl, ethyl or propyl. Such polymers are described in particular in French Patent 1,583,363. (5) Polymers obtained by reacting a polyalkylenepolyamine comprising two primary amine groups and at least one secondary amine group with a dicarboxylic acid chosen from diglycolic acid and saturated aliphatic dicarboxylic acids having 3 to 8 carbon atoms. The molar ratio between the polyalkylene-polylamine and the dicarboxylic acid being between 0.8: 1 and 1.4: 1; the polyaminoamide resulting therefrom being reacted with epichlorohydrin in a molar ratio of epichlorohydrin relative to the secondary amine group of the polyaminoamide of between 0.5: 1 and 1.8: 1. Such polymers are described in particular in the patents US 3,227,615 and 2,961,347. (6) alkyldiallylamine or dialkyldiallylammonium cyclopolymers such as homopolymers or copolymers having units of formula (IV) or (V): (CH2) k - (OH2) t- CR, C (R9) -OH2- - (OH2) t-H20 CH, N + Y-R7 R, (IV) (CH2) kOR / 9C (R9) -CH2-H2CCH2NR7 (V) in which k and t are equal to 0 or 1, the sum k + t being equal to 1; - R9 denotes a hydrogen atom or a methyl group; - R7 and R8, independently of each other, denote an alkyl group having from 1 to 22 carbon atoms, a hydroxyalkyl group in which the alkyl group preferably has 1 to 5 carbon atoms, a lower amidoalkyl group, or R7 and R8 may together with the nitrogen atom to which they are attached, designate heterocyclic groups, such as piperidinyl or morpholinyl; and - Y- is an anion such as bromide, chloride, acetate, borate, citrate, tartrate, bisulfate, bisulfite, sulfate, phosphate.
[0012] These polymers are described in particular in French patent 2,080,759 and in its certificate of addition 2,190,406. Mention may be made, for example, of the homopolymer of diallyldimethylammonium chloride sold under the name "Merquat® 100" by Nalco. (LUBRIZOL) and copolymers of diallyldimethylammonium chloride and acrylamide. (7) polycondensates of quaternary diammonium containing repeating units corresponding to the formula (VI): R10 R12NR11NR13 (VI) (VI) in which R10, R11, R12 and R13, which are identical or different, represent aliphatic, alicyclic or aliphatic aryl groups containing 1 to 20 carbon atoms or lower aliphatic hydroxyalkyl groups, or R10, R11, R12 and R13, together or separately, together with the nitrogen atoms to which they are attached, form heterocycles optionally containing a second heteroatom other than nitrogen, or R10, R11, R12 and R13 represent a linear or branched C1-C6 alkyl group substituted with a nitrile, ester, acyl, amide or -CO-ORD group or -CO-NH-RD wherein R is an alkylene group and D is a quaternary ammonium group; - A1 and B1 represent polymethylene groups containing from 2 to 20 carbon atoms, which may be linear or branched, saturated or unsaturated, and may contain, bound to or intercalated in the main chain, one or more aromatic rings, or one or more oxygen, sulfur or sulfoxide, sulfone, disulfide, amino, alkylamino, hydroxyl, quaternary ammonium, ureido, amide or ester groups, and - X- denotes an anion derived from a mineral or organic acid; A1, R10 and R12 can form with the two nitrogen atoms to which they are attached a piperazine ring; in addition, if A1 denotes a linear or branched, saturated or unsaturated alkylene or hydroxyalkylene group, B1 may also denote a group - (CH2) .- CO-D-OC- (CH2) .- in which D denotes: a) a glycol remainder of formula: -O-Z-O-, where Z denotes a linear or branched hydrocarbon group or a group corresponding to one of the following formulas: - C H2-C H2-O) X-C H2-C H2 - - [CH2-CH (CH3) -O] y-CH2-CH (CH3) - where x and y denote an integer of 1 to 4, representing a defined and unique degree of polymerization or any number of 1 to 4 representing an average degree of polymerization; b) a bis-secondary diamine residue such as a piperazine derivative; c) a bis-primary diamine residue of formula: -NH-Y-NH-, where Y denotes a linear or branched hydrocarbon group, or the divalent group -CH 2 -CH 2 -S-S-CH 2 -CH 2 -; d) a ureylene group of formula: -NH-CO-NH-. Preferably, X- is an anion such as chloride or bromide. These polymers have a number average molecular weight generally between 1000 and 100000.
[0013] Polymers of this type are described in particular in French Pat. Nos. 2,320,330, 2,270,846, 2,316,271, 2,336,434 and 2,413,907 and US Pat. Nos. 2,273,780, 2,375,853, 2,388,614 and 2, respectively. 454,547, 3,206,462, 2,261,002, 2,271,378, 3,874,870, 4,001,432, 3,929,990, 3,966,904, 4,005,193, 4,025,617, 4,025,627, 4,025,653, 4,026,945. and 4,027,020. Polymers which consist of recurring units corresponding to formula (VII) can be used more particularly: ## STR2 ## Wherein R14, R15, R16 and R17, which may be identical or different, denote an alkyl or hydroxyalkyl group having from 1 to about 4 carbon atoms, n and p are integers ranging from 2 to about 20; and X- is an anion derived from a mineral or organic acid. A particularly preferred compound of formula (VII) is that for which R14, R15, R16 and R17 represent a methyl group and n = 3, p = 6 and X = Cl, referred to as "Hexadimethrine chloride" according to the INCI nomenclature (CTFA). (8) quaternary polyammonium polycondensates consisting of units of formula (VIII): ## STR2 ## Wherein R18, R19, R20 and R21, which may be identical or different, represent a hydrogen atom or a methyl, ethyl or propyl group; -hydroxyethyl, p-hydroxypropyl or -CH2CH2 (OCH2CH2) pOH, where p is 0 or an integer from 1 to 6, provided that R18, R19, R20 and R21 do not simultaneously represent a hydrogen atom r, s, which are identical or different, are integers between 1 and 6, q is 0 or an integer between 1 and 34, X denotes a halogen atom, and A represents a group of a dihalide or is preferably -CH 2 -CH 2 -O-CH 2 -CH 2 -. Such compounds are described in particular in patent application EP-A-122 324.
[0014] For example, mention may be made of the "Mirapol® A 15", "Mirapol® AD1", "Mirapol® AZ1" and "Mirapol® 175" products sold by the company Miranol. (9) homopolymers or copolymers derived from acrylic or methacrylic acids and having units (IX), (X) and / or (XI): R22 (X) and / or R22 (XI) I CH2-C R22 0 CI CH2 - NH 2 CH 2 O 2 O A2 I 0 = C X 2 -O = C R 25 N + - R 24 I 0 R 23 0 II A2 X 2 -A 2 II R 25 "N + -R 24, NR 26 R 27 (IX), R 23 in which, - R 22 independently denotes H or CH3, - A2 independently denotes a linear or branched alkyl group of 1 to 6 carbon atoms, or a hydroxyalkyl group of 1 to 4 carbon atoms, - R23, R24, R25, which may be identical or different, independently denote a alkyl group of 1 to 18 carbon atoms, or a benzyl group, - R26 and R27 represent a hydrogen atom or an alkyl group of 1 to 6 carbon atoms, and - X2- denotes an anion, for example methosulphate or halide such as chloride or bromide.
[0015] The comonomer or comonomers usable in the preparation of the corresponding copolymers belong to the family of acrylamides, methacrylamides, diacetone-acrylamides, acrylamides and methacrylamides substituted with nitrogen by lower alkyls, alkyl esters, acrylic or methacrylic acids, the vinylpyrrolidone or vinyl esters. (10) Quaternary polymers of vinylpyrrolidone and vinylimidazole. (11) Crosslinked polymers of methacryloyloxyalkyl (C 1 -C 4) trialkyl (C 1 -C 4) ammonium salts such as polymers obtained by homopolymerization of dimethylaminoethyl methacrylate quaternized with methyl chloride, or by copolymerization of acrylamide with methacrylate of dimethylaminoethyl quaternized by methyl chloride, the homopolymerization or copolymerization being followed by crosslinking with an olefinically unsaturated compound, in particular methylene-bis-acrylamide. Other cationic polymers which can be used in the context of the invention are polyalkyleneimines, in particular polyethyleneimines, polymers containing vinylpyridine or vinylpyridinium units, condensates of polyamines and of epichlorohydrin, quaternary polyureylenes and chitin derivatives. . Of all the cationic polymers having a charge density greater than or equal to 4 meq / g that may be used in the context of the present invention, it is preferred to use those chosen from families (6), (7), (9) and (11), as defined above, and more preferably chosen from: - crosslinked polymers of methacryloyloxyalkyl (C 1 -C 4) trialkyl (C 1 -C 4) ammonium salts, - cyclopolymers of alkyldiallylamine or dialkyldiallylammonium, - homopolymers or copolymers derived from acrylic or methacrylic acids and having units (IX), as defined above, and mixtures thereof. Even better, the cationic polymer or polymers having a charge density of greater than or equal to 4 meq / g, present in the composition according to the invention, are chosen from 2-methacryloyloxyethyltrimethylammonium chloride (Polyquaternium-37), dimethyl diallyl ammonium (Polyquaternium-6) and mixtures thereof. The content of the cationic polymer or polymers having a charge density greater than or equal to 4 meq / g, present in the composition according to the invention, may range from 0.01 to 15% by weight, preferably from 0.05 to 10% by weight. % by weight, and more preferably from 0.1 to 5% by weight, relative to the total weight of the composition.
[0016] The cationic surfactants The composition according to the invention also comprises one or more cationic surfactants. The term "cationic surfactant" means a positively charged surfactant when it is contained in the composition according to the invention. This surfactant may carry one or more positive permanent charges or contain one or more cationizable functions within the composition according to the invention. The cationic surfactant or surfactants are preferably chosen from primary, secondary or tertiary fatty amines, optionally polyoxyalkylenated, or their salts, quaternary ammonium salts, and mixtures thereof. The fatty amines generally comprise at least one C 8 to C 30 hydrocarbon chain. As quaternary ammonium salts, there may be mentioned, for example: (a) those corresponding to the following general formula (XII): ## STR5 ## wherein R 28 to R 31, which may be identical or different, represent an aliphatic group, linear or branched, having 1 to 30 carbon atoms, or an aromatic group such as aryl or alkylaryl, at least one of the groups R28 to R31 denoting a group comprising from 8 to 30 carbon atoms, preferably 12 to 24 carbon atoms The aliphatic groups may comprise heteroatoms such as in particular oxygen, nitrogen, sulfur and halogens, the aliphatic groups are for example chosen from alkyl groups C1 to C30, C1 to C30 alkoxy, (C2-C6) polyoxyalkylene, C1 to C30 alkylamide, (C1-C22) alkyl (C1-C6) alkyl, (C1-C22) alkyl, (C1-C22) alkyl, and C1 to C4 hydroxyalkyl. C30; X- is an anion selected from the group of halides, phosphates, acetates, lactates, (C1-C4) alkyl sulfates, (C1-C4) alkyl or (C1-C4) alkylsulphonates. Among the quaternary ammonium salts of formula (XII), tetraalkylammonium salts, for example dialkyl dimethylammonium or alkyltrimethylammonium salts, in which the alkyl group comprises from about 12 to 22 carbon atoms, are preferred. carbon, in particular the behenyltrimethylammonium, di stearyldimethylammonium, cetyltrimethylammonium, benzyldimethylstearylammonium salts or, on the other hand, palmitylamidopropyltrimethylammonium, stearamidopropyltrimethylammonium salts, stearamidopropyldimethylceararyl ammonium salts, or stearamidopropyldimethyl (myristylacetate) ammonium salts; sold under the name CERAPHYL® 70 by VAN DYK. It is particularly preferred to use the chloride salts of its compounds. (b) the quaternary ammonium salts of imidazoline, for example those of the following formula (XIII): ## STR5 ## R32 is alkenyl or alkyl having 8 to 30 carbon atoms, for example tallow fatty acid derivatives, R33 is hydrogen, C1-C4 alkyl or alkenyl or alkyl having from 8 to 30 carbon atoms, - R34 represents a C1-C4 alkyl group / - R35 represents a hydrogen atom, a C1-C4 alkyl group, and - X- is an anion chosen from the group of halides , phosphates, acetates, lactates, alkyl sulphates, alkyl or alkylaryl sulphonates, the alkyl and aryl groups of which preferably comprise 1 to 20 carbon atoms and 6 to 30 carbon atoms, respectively. alkenyl or alkyl groups having from 12 to 21 carbon atoms, for example derivatives of tallow fatty acids, R34 denotes a methyl group, R35 denotes a hydrogen atom. Such a product is, for example, sold under the name REWOQUAT® W 75 by the company REWO; (c) quaternary di or triammonium salts, in particular of formula (XIV): embedded image in which R 36 denotes an alkyl radical; R 37 R 39 1 1 R 32 6 1 -N- (CH) N-R 4 comprising about 16 to 30 carbon atoms optionally hydroxylated and / or interrupted by one or more oxygen atoms, -R37 is chosen from hydrogen or an alkyl radical containing from 1 to 4 carbon atoms or a group (R36a) (R37a) (R38a) N- (CH2) 3, R36a, R37a, R38a, R38, R39, R40 and R41, which may be identical or different, are chosen from hydrogen or an alkyl radical containing from 1 to 4 carbon atoms and X- is an anion selected from the group of halides, acetates, phosphates, nitrates and methylsulfates. Such compounds are, for example, Finquat CT-P proposed by Finetex (Quaternium 89), Finquat CT proposed by Finetex (Quaternium 75), (d) quaternary ammonium salts containing at least one ester function, such as those of the following formula (XV): ## STR2 ## wherein R4 is R45 X (XV) 1 1 + R44 C - (OC, 1-12dy - N - (CtH2t0) '- R43 1 R42 R 42 is chosen from C 1 to C 6 alkyl groups and C 1 to C 6 hydroxyalkyl or dihydroxyalkyl groups; R 43 is chosen from: - the group - R 47 groups which are linear or branched, saturated or branched C 1 to C 22 hydrocarbon groups; unsaturated, - the hydrogen atom, R45 is chosen from: R46 - the group R48 - R49 groups which are linear or branched, saturated or unsaturated C 1 -C 6 hydrocarbon-based groups, - the hydrogen atom, R44, R46 and R48, which are identical or different, are chosen from linear or branched, saturated or unsaturated C7 to C21 hydrocarbon groups; s r, s and t, which are identical or different, are integers ranging from 2 to 6; y is an integer from 1 to 10; x and z, which are identical or different, are integers ranging from 0 to 10; X- is a simple or complex anion, organic or inorganic; with the proviso that the sum x + y + z is from 1 to 15, that when x is 0 then R43 is R47 and that when z is 0 then R45 is R49. The alkyl groups R42 may be linear or branched and more particularly linear.
[0017] Preferably, R 42 denotes a methyl, ethyl, hydroxyethyl or dihydroxypropyl group, and more particularly a methyl or ethyl group. Advantageously, the sum x + y + z is from 1 to 10. When R43 is a hydrocarbon R47 group, it may be long and have from 12 to 22 carbon atoms, or short and have from 1 to 3 carbon atoms. When R45 is a hydrocarbon R49 group, it preferably has 1 to 3 carbon atoms. Advantageously, R44, R46 and R48, which are identical or different, are chosen from linear or branched, saturated or unsaturated C11-C21 hydrocarbon-based groups, and more particularly from linear or branched, saturated C12-C21 alkyl and alkenyl groups. or unsaturated. Preferably, x and z, identical or different, are 0 or 1.
[0018] Advantageously, y is equal to 1. Preferably, r, s and t, which are identical or different, are equal to 2 or 3, and even more particularly are equal to 2.
[0019] The anion X- is preferably a halide (chloride, bromide or iodide) or an alkyl sulphate more particularly methyl sulphate. However, it is possible to use methanesulphonate, phosphate, nitrate, tosylate, an anion derived from an organic acid such as acetate or lactate or any other anion compatible with ammonium with an ester function. The X- anion is even more particularly chloride or methylsulfate. In the composition according to the invention, the ammonium salts of formula (XV) are used more particularly in which: R 42 denotes a methyl or ethyl group, x and y are equal to 1; z is 0 or 1; r, s and t are 2; R43 is selected from: - the group R46 C - methyl, ethyl or C14 to C22 hydrocarbon groups, - the hydrogen atom; R 45 is selected from: - the group R 48 - the hydrogen atom; R44, R46 and R48, which are identical or different, are chosen from linear or branched, saturated or unsaturated C13-C17 hydrocarbon-based groups, and preferably from linear or branched, saturated or unsaturated CH-C17 alkyl and alkenyl groups; . Advantageously, the hydrocarbon groups are linear. There may be mentioned, for example, the compounds of formula (XV) such as the salts (especially chloride or methylsulfate) of diacyloxyethyl dimethylammonium, diacyloxyethylhydroxyethylmethylammonium, monoacyloxyethyl-dihydroxyethylmethylammonium, triacyloxyethylmethylammonium, monoacyloxyethylhydroxyethyl dimethylammonium and mixtures thereof. The acyl groups preferably have from 14 to 18 carbon atoms and come more particularly from a vegetable oil such as palm oil or sunflower oil. When the compound contains more than one acyl group, the latter may be identical or different. These products are obtained, for example, by direct esterification of triethanolamine, triisopropanolamine, alkyldiethanolamine or alkyldiisopropanolamine, optionally oxyalkylenated, with C10-C30 fatty acids or with mixtures of C10-C30 fatty acids. plant or animal origin, or by transesterification of their methyl esters. This esterification is followed by quaternization using an alkylating agent such as an alkyl halide (preferably methyl or ethyl), a dialkyl sulphate (preferably methyl or ethyl), methanesulfonate. methyl, para-toluenesulfonate methyl, chlorohydrin glycol or glycerol. Such compounds are, for example, sold under the names DEHYQUART® by the company HENKEL, STEPANQUAT® by the company STEPAN, NOXAMIUM® by the company CECA, REWOQUAT® WE 18 by the company REWO-WITCO. The composition according to the invention may contain, for example, a mixture of quaternary ammonium mono-, di- and triester salts with a majority by weight of diester salts.
[0020] It is also possible to use the ammonium salts containing at least one ester function described in US-A-4874554 and US-A4137180. Behenoylhydroxypropyltrimethylammonium chloride proposed by KAO can be used under the name Quatarmin BTC 131. Preferably, the ammonium salts containing at least one ester function contain two ester functions.
[0021] Among the quaternary ammonium salts containing at least one useful ester function, it is preferred to use dipalmitoylethylhydroxyethylmethylammonium salts. The cationic surfactant (s) present in the composition according to the invention are more preferably chosen from the quaternary ammonium salts of formula (XII) described above, the quaternary ammonium salts containing at least one ester function, and their mixtures. More preferably, the cationic surfactant (s) present in the composition according to the invention are chosen from cetyltrimethylammonium chloride, dipalmitoylethylhydroxyethylammonium methosulfate and mixtures thereof, and most preferably cetyltrimethylammonium chloride. The content of the cationic surfactant (s) present in the composition according to the invention may range from 0.05 to 10% by weight, preferably from 0.1 to 5% by weight, and more preferably from 0.3 to 2% by weight. % by weight, relative to the total weight of the composition. The fatty substances The composition according to the invention may optionally further comprise one or more fatty substances. By "fatty substance" is meant an organic compound which is insoluble in water at ordinary temperature (25 ° C.) and at atmospheric pressure (760 mmHg) (solubility less than 5%, preferably less than 1%, and more preferably less than 0.1%). They have in their structure at least one hydrocarbon chain comprising at least 6 carbon atoms or a chain of at least two siloxane groups. In addition, the fatty substances are generally soluble in organic solvents under the same conditions of temperature and pressure, such as, for example, chloroform, dichloromethane, carbon tetrachloride, ethanol, benzene, toluene, tetrahydrofuran ( THF), petrolatum oil or decamethylcyclopentasiloxane.
[0022] Preferably, the fatty substances of the invention do not contain salified or non-salified carboxylic acid groups (-C (O) OH or -C (O) O-). In particular, the fatty substances of the invention are neither polyoxyalkylenated nor polyglycerolated.
[0023] Preferably, the fatty substances that can be used in the composition according to the invention are non-silicone oils. By "oil" is meant a "fat" which is liquid at room temperature (25 ° C), and at atmospheric pressure (760 mm Hg).
[0024] The term "non-silicone oil" means an oil containing no silicon atom (Si) and a "silicone oil" an oil containing at least one silicon atom. More particularly, the one or more fatty substances are chosen from C 6 to C 16 hydrocarbons, hydrocarbons containing more than 16 carbon atoms, non-silicone oils of animal origin, vegetable oils of the triglyceride type, synthetic triglycerides, and oils. fluorinated alcohols, fatty alcohols and fatty acids, esters of fatty acids and / or fatty alcohol different from triglycerides and vegetable waxes, non-silicone waxes, silicones.
[0025] It is recalled that for the purposes of the invention, the alcohols, esters and fatty acids more particularly have one or more linear or branched hydrocarbon groups, saturated or unsaturated, comprising 6 to 30 carbon atoms, which are optionally substituted, in particular by one or more hydroxyl groups (in particular 1 to 4). If unsaturated, these compounds may comprise one to three carbon-carbon double bonds, conjugated or otherwise. With regard to the C6 to C16 hydrocarbons, the latter are linear, branched, optionally cyclic and preferably alkanes. By way of example, mention may be made of hexane, dodecane and isoparaffins, such as isohexadecane and isodecane. As hydrocarbon oils of animal origin, mention may be made of perhydrosqualene.
[0026] Triglyceride oils of vegetable or synthetic origin are preferably chosen from liquid triglycerides of fatty acids containing from 6 to 30 carbon atoms, for instance triglycerides of heptanoic or octanoic acids or else, for example, sunflower seed oils. corn, soy, squash, grape seed, sesame, hazelnut, apricot, macadamia, arara, castor, avocado, tea seed, passionflower seed, seed of meadowfoam, triglycerides of caprylic / capric acids such as those sold by Stearineries Dubois or those sold under the names Miglyol® 810, 812 and 818 by the company Dynamit Nobel, jojoba oil, shea butter oil . The linear or branched hydrocarbons, of mineral or synthetic origin, of more than 16 carbon atoms, are preferably chosen from paraffin oils, petroleum jelly, liquid petroleum jelly, polydecenes, hydrogenated polyisobutene such as Parleam® . The fluorinated oils may be chosen from perfluoromethylcyclopentane and perfluoro-1,3-dimethylcyclohexane, sold under the names "FLUTEC® PC1" and "FLUTEC® PC3" by BNFL Fluorochemicals; perfluoro-1,2-dimethylcyclobutane perfluoroalkanes such as dodecafluoropentane and tetradecafluorohexane, sold under the names "PF 5050®" and "PF 5060®" by the company 3M, or bromoperfluorooctyl sold under the name "FORALKYL® "by the Atochem Company; nonafluoro-methoxybutane and nonafluoroethoxyisobutane; perfluoromorpholine derivatives, such as 4-trifluoromethyl perfluoromorpholine sold under the name "PF 5052®" by the company 3M. The fatty alcohols that can be used in the composition according to the invention are saturated or unsaturated, linear or branched, and contain from 6 to 30 carbon atoms and more particularly from 8 to 18 carbon atoms. For example, cetyl alcohol, stearyl alcohol and their mixture (cetylstearyl alcohol), octyldodecanol, 2-butyloctanol, 2-hexyldecanol, 2-undecylpentadecanol, oleic alcohol or linoleic alcohol may be mentioned; . The wax or waxes that may be used in the composition according to the invention are chosen in particular from Carnauba wax, Candelila wax, and Alfa wax, paraffin wax, ozokerite and waxes. vegetable oils such as olive wax, rice wax, hydrogenated jojoba wax or absolute waxes of flowers such as the essential wax of blackcurrant flower sold by the company BERTIN (France), animal waxes such as waxes bees, or modified beeswaxes (cerabellina); other waxes or waxy raw materials that can be used according to the invention are, in particular, marine waxes, such as the one sold by SOPHIM under the reference M82, and polyethylene or polyolefin waxes in general.
[0027] With regard to the fatty acid esters and / or fatty alcohols, advantageously different from the triglycerides mentioned above, mention may in particular be made of saturated or unsaturated, linear or branched C 1 -C 26 aliphatic mono or poly acid esters and of saturated or unsaturated, linear or branched C1 to C26 aliphatic mono- or polyalcohols, the total number of carbon of the esters being more particularly greater than or equal to 10. Among the monoesters, mention may be made of dihydroabietyl behenate; octyldodecyl behenate; isoketyl behenate; cetyl lactate; C12 to C15 alkyl lactate; isostearyl lactate; lauryl lactate; linoleyl lactate; oleyl lactate; (iso) stearyl octanoate; isocetyl octanoate; octyl octanoate; cetyl octanoate; decyl oleate; isocetyl isostearate; isocetyl laurate; isocetyl stearate; isodecyl octanoate; isodecyl oleate; isononyl isononanoate; isostearyl palmitate; methyl ricinoleate acetyl; myristyl stearate; octyl isononanoate; 2-ethylhexyl isononanoate; octyl palmitate; octyl pelargonate; octyl stearate; octyldodecyl erucate; oleyl erucate; ethyl palmitates and isopropyl palmitate, ethyl-2-hexyl palmitate, 2-octyldecyl palmitate, alkyl myristates such as isopropyl, butyl, cetyl, 2-octyldodecyl myristate; , styryl, hexyl stearate, butyl stearate, isobutyl stearate; dioctyl malate, hexyl laurate, 2-hexyldecyl laurate. Still within the scope of this variant, it is also possible to use esters of C 4 to C 22 di or tricarboxylic acids and of C 1 to C 22 alcohols and esters of mono di or tricarboxylic acids and di, tri, alcohols. C2 to C26 tetra or pentahydroxy.
[0028] These include: diethyl sebacate; diisopropyl sebacate; diisopropyl adipate; di-propyl adipate; dioctyl adipate; diisostearyl adipate; dioctyl maleate; glyceryl undecylenate; octyldodecyl stearoyl stearate; pentaerythrityl monoricinoleate; pentaerythrityl tetraisononanoate; pentaerythrityl tetrapelargonate; pentaerythrityl tetraisostearate; pentaerythrityl tetraoctanoate; propylene glycol dicaprylate; propylene glycol dicaprate, tridecyl erucate; triisopropyl citrate; triisotearyl citrate; glyceryl trilactate; glyceryl trioctanoate; trioctyldodecyl citrate; trioleyl citrate, propylene glycol dioctanoate; neopentyl glycol diheptanoate; diethylene glycol diisanonate; and polyethylene glycol distearates. Among the esters mentioned above, it is preferred to use ethyl, isopropyl, myristyl, cetyl, stearyl palmitates, ethyl-2-hexyl palmitate, 2-octyldecyl palmitate, sodium myristates and the like. alkyls such as isopropyl, butyl, cetyl, 2-octyldodecyl myristate, hexyl stearate, butyl stearate, isobutyl stearate; dioctyl malate, hexyl laurate, 2-hexyldecyl laurate and isononyl isonononate, cetyl octanoate. The composition may also comprise, as fatty ester, esters and diesters of C 6 to C 30, preferably C 12 to C 22, fatty acid sugars. It is recalled that "sugar" is understood to mean oxygenated hydrocarbon compounds which have several alcohol functions, with or without an aldehyde or ketone function, and which contain at least 4 carbon atoms. These sugars can be monosaccharides, oligosaccharides or polysaccharides.
[0029] Suitable sugars include, for example, sucrose (or sucrose), glucose, galactose, ribose, fucose, maltose, fructose, mannose, arabinose, xylose, lactose, and their derivatives. especially alkyls, such as methyl derivatives such as methylglucose.
[0030] The esters of sugars and of fatty acids may be chosen in particular from the group comprising the esters or mixtures of esters of sugars described previously and of C 6 to C 30, preferably C 12 to C 22 fatty acids, linear or branched, saturated or unsaturated. If unsaturated, these compounds may comprise one to three carbon-carbon double bonds, conjugated or otherwise. The esters according to this variant may also be chosen from mono-, di-, tri- and tetraesters, polyesters and mixtures thereof. These esters may be for example oleate, laurate, palmitate, myristate, behenate, cocoate, stearate, linoleate, linolenate, caprate, arachidonates, or mixtures thereof, such as in particular the mixed oleo-palmitate, oleostearate and palmito-stearate esters. More particularly, the mono- and di-esters are used, and especially the mono- or dioleate, stearate, behenate, oleopalmitate, linoleate, linolenate, oleostearate, sucrose, glucose or methylglucose. By way of example, mention may be made of the product sold under the name Glucate® DO by the company Amerchol, which is a methylglucose dioleate.
[0031] Mention may also be made, by way of examples, of esters or mixtures of esters of fatty acid sugar: the products sold under the names F160, F140, F110, F90, F70 and 5L40 by the company Crodesta, respectively denoting sucrose palmito-stearates of 73% monoester and 27% di- and tri-ester, 61% monoester and 39% di-, tri- and tetraester, 52% monoester and 48% monoester; % di-, tri- and tetraester, 45% monoester and 55% di-, tri- and tetraester, 39% monoester and 61% di-, tri-, and tetra. -ester, and sucrose mono-laurate; the products sold under the name Ryoto Sugar Esters, for example referenced B370 and corresponding to sucrose behenate formed from 20% monoester and 80% di-triester-polyester; the sucrose mono-dipalmito-stearate marketed by Goldschmidt under the name Tegosoft® PSE.
[0032] The silicones that can be used in accordance with the invention can be in the form of oils, waxes, resins or gums. Preferably, the silicone is chosen from polydialkylsiloxanes, especially polydimethylsiloxanes (PDMS), and organomodified polysiloxanes comprising at least one functional group chosen from amino groups, aryl groups and alkoxy groups. Organopolysiloxanes are further defined in Walter Noll's "Chemistry and Technology of Silicones" (1968), Academie Press. They can be volatile or nonvolatile.
[0033] When they are volatile, the silicones are more particularly chosen from those having a boiling point of between 60 ° C. and 260 ° C., and even more particularly from: (i) cyclic polydialkylsiloxanes containing from 3 to 7, preferably from 4 to 5 silicon atoms. It is, for example, octamethylcyclotetrasiloxane sold in particular under the name VOLATILE SILICONE® 7207 by UNION CARBIDE or SILBIONE® 70045 V2 by RHODIA, decamethylcyclopentasiloxane marketed under the name VOLATILE SILICONE® 7158 by UNION CARBIDE, and SILBIONE ® 70045 V5 by RHODIA, as well as their mixtures. Mention may also be made of cyclocopolymers of the dimethylsiloxane / methylalkylsiloxane type, such as the VOLATILE® SILICONE FZ 3109 marketed by UNION CARBIDE, of formula: ## STR2 ## with D ': CH3 Mention may also be made of mixtures of cyclic polydialkylsiloxanes with organic compounds derived from silicon, such as the mixture of octamethylcyclotetrasiloxane and tetramethylsilylpentaerythritol (50/50) and the mixture of octamethylcyclotetrasiloxane and oxy-1, 1 '- (hexa-2,2,2', 2 ', 3,3'-trimethylsilyloxy) bis-neopentane (ii) linear volatile polydialkylsiloxanes having 2 to 9 silicon atoms and having a viscosity of less than or equal to -6 m2 / s at 25 ° C. This is, for example, decamethyltetrasiloxane marketed in particular under the name "SH 200" by Toray Silicone, silicones entering this class are also described in the published article. in Cosmetics and Toiletries, Vol. 91, Jan. 76, p. 27-32 - TODD & BYERS "Volatile Silicone fluids for cosmetics". Non-volatile polydialkylsiloxanes, polydialkylsiloxane gums and resins, polyorganosiloxanes modified with the above organofunctional groups and mixtures thereof are preferably used. These silicones are more particularly chosen from polydialkylsiloxanes among which may be mentioned mainly polydimethylsiloxanes with trimethylsilyl end groups. The viscosity of the silicones is measured at 25 ° C. according to the ASTM 445 Appendix C standard. Among these polydialkylsiloxanes, mention may be made, without limitation, of the following commercial products: SILBIONE® oils of the 47 and 70 047 series or the MIRASIL® oils marketed by RHODIA, such as, for example, 70 047 V 500 000; the oils of the MIRASIL® series marketed by RHODIA; the oils of the 200 series of Dow Corning, such as DC200 having a viscosity of 60,000 mm 2 / s; - VISCASIL® oils from GENERAL ELECTRIC and some oils from SF series (SF 96, SF 18) from GENERAL ELECTRIC. Mention may also be made of polydimethylsiloxane dimethylsilanol end groups known under the name of dimethiconol (CTFA), such as the oils of the 48 series from Rhodia. In this class of polydialkylsiloxanes, mention may also be made of the products sold under the names "ABIL WAX® 9800 and 9801" by GOLDSCHMIDT, which are polydialkyl (C 1 -C 20) siloxanes.
[0034] The silicone gums that can be used in accordance with the invention are in particular polydialkylsiloxanes, preferably polydimethylsiloxanes having high average molecular weights of between 200,000 and 1,000,000 used alone or in a mixture in a solvent. This solvent may be chosen from volatile silicones, polydimethylsiloxane (PDMS) oils, polyphenylmethylsiloxane (PPMS) oils, isoparaffins, polyisobutylenes, methylene chloride, pentane, dodecane, tridecane or their mixtures. More particularly useful products according to the invention are mixtures such as: - mixtures formed from a hydroxyl end-of-the-chain polydimethylsiloxane, or dimethiconol (CTFA) and a cyclic polydimethylsiloxane also called cyclomethicone (CTFA) such that the product Q2 1401 marketed by the company Dow Corning; mixtures of a polydimethylsiloxane gum and a cyclic silicone such as the product SF 1214 Silicone Fluid from the company General Electric, this product is an SF 30 gum corresponding to a dimethicone, having a number average molecular weight of 500,000 solubilized in oil SF 1202 Silicone Fluid corresponding to decamethylcyclopentasiloxane; mixtures of two PDMSs of different viscosities, and more particularly of a PDMS gum and a PDMS oil, such as the product SF 1236 from the company General Electric. The product SF 1236 is the mixture of an SE 30 gum defined above having a viscosity of 20 m 2 / s and an SF 96 oil with a viscosity of 5.10-6 m 2 / s. This product preferably comprises 15% of SE 30 gum and 85% of an SF 96 oil.
[0035] The organopolysiloxane resins that can be used in accordance with the invention are crosslinked siloxane systems containing the units: R25iO2 / 2, R35iO1 / 2, R5iO3 / 2 and 5i0412 in which R represents an alkyl having 1 to 16 carbon atoms. Among these products, those particularly preferred are those in which R denotes a lower alkyl group C1 to C4, more particularly methyl. Among these resins, mention may be made of the product marketed under the name "Dow Corning 593" or those sold under the names "Silicone Fluid SS 4230 and SS 4267" by the company General Electric and which are silicones of dimethyl / trimethyl siloxane structure. Mention may also be made of the trimethylsiloxysilicate type resins sold in particular under the names X22-4914, X21-5034 and X21-5037 by the company Shin-Etsu. The organomodified silicones that may be used according to the invention are silicones as defined above and comprising in their structure one or more organofunctional groups attached via a hydrocarbon-based group. The organomodified silicones may be polydiaryl siloxanes, especially polydiphenylsiloxanes, and polyalkylarylsiloxanes functionalized with the organofunctional groups mentioned above.
[0036] The polyalkylarylsiloxanes are particularly chosen from polydimethyl / methylphenylsiloxanes, linear and / or branched polydimethyl / diphenylsiloxanes with a viscosity ranging from 1 × 10 -5 to 5 × 10 -2 m 2 / s at 25 ° C.
[0037] Among these polyalkylarylsiloxanes, mention may be made by way of example of the products sold under the following names: SILBIONE® oils of the 70 641 series from RHODIA; - the RHODORSIL® 70 633 and 763 RHODIA series of oils; - DOW CORNING 556 COSMETIC GRAD FLUID oil from Dow Corning; the silicones of the PK series of BAYER, such as the product PK20; the silicones of the PN, PH series of BAYER, such as the PN1000 and PH1000 products; certain oils of the SF series of GENERAL ELECTRIC such as SF 1023, SF 1154, SF 1250 and SF 1265. Among the organomodified silicones, mention may also be made of polyorganosiloxanes comprising: substituted or unsubstituted amino groups, such as the products sold under the name GP 4 Silicone Fluid and GP 7100 by the company GENESEE or the products sold under the names Q2 8220 and Dow Corning 929 or 939 by Dow Corning. The substituted amino groups are, in particular, C1-C4 aminoalkyl groups; alkoxylated groups, such as the product sold under the name "Silicone Copolymer F-755" by SWS Silicones and Abil Wax® 2428, 2434 and 2440 by the company GOLDSCHMIDT. Preferably, the fatty substances that can be used in the composition according to the invention are non-silicone.
[0038] Preferably, the one or more fatty substances are chosen from fatty alcohols, fatty esters, oils of mineral origin, vegetable oils of triglyceride type and their mixtures. The content of the fat or fats, when they are present in the composition according to the invention, can range from 1 to 30% by weight, preferably from 5 to 25% by weight, and more preferably from 10 to 20% by weight. by weight, relative to the total weight of the composition. Organic acids The composition may optionally further comprise one or more organic acids. For the purposes of the present invention, the term "organic acid" means an organic acid and / or its associated bases having a pKa of less than or equal to 7, preferably less than or equal to 6, especially ranging from 1 to 6, preferably from 2 to According to a preferred embodiment, the organic acid or acids are chosen from carboxylic acids, sulphonic acids and mixtures thereof. In particular, the organic acid or acids are chosen from saturated or unsaturated carboxylic acids. Preferably, the organic acid or acids are chosen from lactic acid, propanoic acid, butanoic acid, acetic acid, citric acid, maleic acid, glycolic acid and salicylic acid. , malic acid, tartaric acid and mixtures thereof, and more preferentially lactic acid. The content of the organic acid or acids, when they are present in the composition according to the invention, can range from 0.1 to 10% by weight, and preferably from 0.5 to 5% by weight, relative to the total weight of the composition.
[0039] By cosmetically acceptable medium is meant, according to the present application, a medium compatible with keratin fibers, such as the hair. The cosmetically acceptable medium consists of water or a mixture of water and one or more cosmetically acceptable solvents chosen from lower C 1 -C 4 alcohols, such as ethanol, isopropanol and tert-butanol. or n-butanol; polyols such as glycerol, propylene glycol and polyethylene glycols; and their mixtures.
[0040] The pH of the compositions according to the invention generally varies from 3 to 10, preferably from 4 to 7, and more preferably from 4 to 6. The composition may optionally further comprise one or more additional additives. The composition according to the invention may optionally comprise one or more additives, different from the compounds of the invention and among which mention may be made of surfactants, in particular nonionic, amphoteric or zwitterionic surfactants, anionic, nonionic or amphoteric polymers, or mixtures thereof, anti-dandruff agents, antiseborrhoeic agents, anti-hair loss and / or regrowth agents, vitamins and pro-vitamins including panthenol, sunscreens, inorganic or organic pigments, sequestering agents, plasticizing agents, solubilizing agents, acidifying agents, inorganic or organic thickeners, especially polymeric thickeners, opacifying or pearlescent agents, antioxidants, hydroxy acids, perfumes, preservatives, pigments and ceramides. Of course, those skilled in the art will take care to choose this or these optional additional compounds in such a way that the advantageous properties intrinsically attached to the composition according to the invention are not, or not substantially, impaired by the addition or additions envisaged . The above additives can generally be present in an amount for each of them ranging from 0 to 20% by weight, based on the total weight of the ready-to-use composition.
[0041] The present invention also relates to a process for the cosmetic treatment of keratinous fibers, which consists in applying to said keratinous fibers an effective amount of a composition as defined above.
[0042] The composition may be applied to dry or moist keratinous fibers, having optionally been washed with a shampoo. Preferably, the composition according to the invention is applied to moist keratinous fibers.
[0043] At the end of the treatment, the keratin fibers are optionally rinsed with water, optionally washed with a shampoo followed by rinsing with water, before being dried or allowed to dry. The composition according to the present invention is applied in a laying time of from 1 to 15 minutes, preferably from 2 to 10 minutes. The present invention finally relates to the use of a composition as described above to give keratin fibers a cosmetic care remanent to shampoos.
[0044] The term "keratinous fibers" according to the present application denotes human keratinous fibers, and in particular the hair. The following examples serve to illustrate the invention without being limiting in nature.
[0045] EXAMPLES In the examples which follow, all the amounts are indicated as percentage by weight relative to the total weight of the composition.
[0046] I. Example 1 a. Compositions tested The following compositions, Al (invention) and B1 (comparative), were prepared from the ingredients whose contents are indicated in the table below.
[0047] Al B1 (Invention) (Comparative) Cetylstearyl alcohol (C16 / C18, 50/50) 9 9 Mixture of myristyl stearate and myristyl palmitate 1 1 White mineral oil 3 3 Methyl sulfate 4,5 4,5 dipalmitoylethyl hydroxyethyl methyl ammonium / cetearyl alcohol (30/70) (1.35 MA + (1.35 MA + 3.15 MA) 3.15 MA) cetyltrimethylammonium chloride, 25% aqueous solution 3.2 3.2 (0) , 8 MA) (0.8 MA) 3-aminopropyltriethoxysilane 5 - Lactic acid 2 2 0.1% Chlorhexidine digluconate 0.1 Preservative, Perfume Qs Qs Poly dimethyl diallyl ammonium chloride, in 40% aqueous solution 1,2 - ( 0.48 MA) Water Qs 100 Qs 100 MA: active ingredient The compositions Al and B1 thus obtained were applied on the same hair, applying each composition on a half-head at a rate of 6g per half-head, on wet hair . The test was repeated on 14 models. An expert then evaluated each of the following conditioning properties: disentangling, flexibility, smoothing. The disentangling was evaluated using a comb, while the other properties were scored by touch. For each of the 14 trials, the expert assigned a score from 0 to 5, with 0 being a minimum level of conditioning and 5 being maximum level. Then the persistence of each of these properties after 3 shampoos was evaluated according to the same criteria as above. b. Results The results of the conditioning properties are given in the following table (average values for the 14 tests).
[0048] After After 3 application shampoos Detangling Al 3.6 3.1 B1 3.6 2.2 Flexibility Al 3.3 3.2 B1 3.3 2.6 Smoothing Al 2.8 2.9 B1 3.2 1.9 For smoothing, although the invention is slightly less efficient than the comparative after application (at TO), it is found that the effect is residual after 3 shampoos for the invention while it is not with the comparative . The results above show that the hair treated with the composition according to the invention (Al) have good conditioning properties, which are remanent to shampoos, unlike the conditioning effects obtained with the comparative composition (B1). Indeed, even after three shampoos, the hair treated with the composition (Al) retain their conditioning properties. Conversely, the properties obtained with the composition (B1) degrade.
[0049] II. Example 2 a. Compositions Tested The following compositions, A2 (invention) and B2 (comparative), were prepared from the ingredients whose contents are indicated in the table below. A2 B2 (Invention) (Comparative) cetyl trimethylchloride 3.2% 3.2% ammonium (0.8% MA) (0.8% MA) 3-aminopropyltriethoxysilane 5% 5% Polyquaternium-6 1.2% - (charge density: 6 meq / g) (0.4% MA) Polyquaternium-10 - 0.44% (charge density: 1.1 meq / g) (0.4% MA) Water Qs 100% Qs 100 % b. Procedure The compositions A2 and B2 thus obtained were applied at a rate of 1 g onto strands of discolored and wet hair weighing 2.7 g. An expert then evaluated, by means of a comb, the remanence of disentangling after 3 shampoos, for each of the strands tested, by assigning notes ranging from 0 to 5, with 0 corresponding to a minimum level of disentangling (detangling very difficult) and 5 corresponding to a very easy level of disentangling. vs. Results The results of the disentangling properties are given in the following table (average value for the 2 locks).
[0050] After 3 Shampoos A2 (Invention) B2 (Comparative) The above results show that the presence of a cationic polymer having a charge density greater than or equal to 4 meq / g is necessary to obtain good conditioning properties. which are at least persistent after 3 shampoos. Indeed, the hair treated with the composition comprising Polyquaternium-6 (invention) disentangle much better than the hair treated with the composition comprising Polyquaternium-10 (comparative), after 3 shampoos.
[0051] III. Example 3 a. Compositions Tested The following compositions, Al (invention) and B3 (comparative), were prepared from the ingredients whose contents are indicated in the table below. Al B3 (Invention) (Comparative) Cetylstearyl alcohol 9 9 (C16 / C18, 50/50) Mixture of myristyl stearate and myristyl palmitate 1 1 White mineral oil 3 3 Dipalmitoylethyl hydroxyethyl 4,5 4,5 methyl ammonium methosulphate / alcohol (1.35 MA + (1.35 MA + cetearyl (30/70) 3.15 MA) 3.15 MA) cetyltrimethyl 3,2 3,2 ammonium chloride, 25% aqueous solution (0) , 8 MA) (0.8 MA) 3-aminopropyltriethoxysilane 5 Lactic acid 2 2 0.1% chlorhexidine digluconate 0.1% Preservative, Perfume Qs Qs Poly dimethyl diallyl ammonium chloride, in 40% aqueous solution 1,2 - ( 0.48 MA) Water Qs 100 Qs 100 MA: active ingredient The compositions Al and B3 thus obtained were applied at a rate of 6g per half-head on damp hair. The test was performed on 6 models with sensitized hair. Directly after the application of compositions Al and B3, an expert evaluated, using a comb, the level of disentangling, for all 6 comparative tests, by assigning scores ranging from 0 to 5, with 0 corresponding to a minimum level of disentangling (very difficult disentangling) and 5 corresponding to a very high level of disentangling. The remanence of disentangling after 3 shampoos was also determined, according to the same criteria as above. b. Results The results of the disentangling properties are given in the following table (average value for the 6 tests). After After 3 Shampoo Application Al (Invention) 3.6 3.4 B3 (Comparative) 3.8 2.8 The above results show that the composition according to the present invention (Al) makes it possible to obtain good disentangling properties. . Moreover, unlike the properties obtained with the composition B3, those obtained with the composition Al are remanent to shampoos. Indeed, even after three washes, the hair treated with the composition comprising a cationic polymer having a charge density equal to 4 meq / g (invention) retain their disentangling properties. Conversely, these properties fade when the hair is treated with a composition not comprising a cationic polymer, having a charge density greater than or equal to 4 meq / g. The presence of this type of particular cationic polymer is therefore necessary to provide a lasting effect to the cosmetic properties. IV. Example 4 a. Compositions Tested The following compositions, Al (invention) and B4 (comparative), were prepared from the ingredients whose contents are indicated in the table below. Al B4 (Invention) (Comparative) Cetylstearyl alcohol 9 9 (C16 / C18, 50/50) Blend of myristyl stearate and myristyl palmitate 1 1 White mineral oil 3 3 4.5 4,5-Methyl dipalmitoylethyl hydroxyethyl (1 , MA + (1.35 MA + methyl ammonium / alcohol 3.15 MA) 3.15 MA) cetearyl (30/70) Cetyl trimethyl ammonium chloride, 25% aqueous solution 3.2 3.2 (0) , 8 MA) (0.8 MA) 3-aminopropyltriethoxysilane 5 - Lactic acid 2 2 0.1% Chlorhexidine digluconate 0.1% Preservative, Perfume Qs Qs Poly dimethyl diallyl ammonium chloride, 40% aqueous solution 1.2 1, 2 (0.48 MA) (0.48 MA) Water Qs 100 Qs 100 MA: active ingredient The compositions Al and B4 were applied at a rate of 6g per half-head on damp hair. The test was performed on 6 models with sensitized hair. Directly after the application of compositions Al and B4, an expert evaluated, using a comb, the level of disentangling, for all 6 comparative tests, by assigning scores ranging from 0 to 5, with 0 corresponding to a minimum level of disentangling (very difficult disentangling) and 5 corresponding to a very high level of disentangling. The remanence of disentangling after 3 shampoos was also determined, according to the same criteria as above. b. Results The results of the disentangling properties are given in the following table (average value for the 6 tests). After After 3 shampoos Al application (invention) 3.2 3.3 B4 (comparative) 3.5 2.6 The above results show that the composition according to the present invention (AI) provides good disentangling properties which are sticky to at least 3 shampoos, unlike the properties obtained with the composition B4. Indeed, after three washes, the hair treated with the composition comprising 3-aminopropyltriethoxysilane (invention) retain their disentangling properties. Conversely, these properties fade when the hair is treated with a composition not comprising an organosilane of formula (I).
[0052] The presence of a silane of formula (I) is therefore necessary to provide a lasting effect to the cosmetic properties.
权利要求:
Claims (18)
[0001]
REVENDICATIONS1. Cosmetic composition for the care of keratinous fibers, in particular human keratinous fibers such as the hair, comprising in a cosmetically acceptable medium: (i) one or more organosilanes, (ii) one or more cationic polymers having a higher charge density or equal to 4 meq / g, and (iii) one or more cationic surfactants.
[0002]
2. Composition according to the preceding claim, characterized in that the organosilane (s) are chosen from compounds of formula (I) and / or their oligomers: R1Si (OR2), (R3) '(OH) y (I) in which R 1 is a linear or branched, saturated or unsaturated, cyclic or acyclic, C 1 to C 22 hydrocarbon-based chain, which may be substituted with a group chosen from amine groups NH 2 or NHR (R being a linear alkyl or branched C1 to C20, especially C1 to C6, or a C3 to C40 cycloalkyl or a C6 to C30 aromatic radical); the hydroxy group (OH); a thiol group; an aryl group (more particularly benzyl) optionally substituted with an NH 2 or NHR group; R1 may be interrupted by a heteroatom (O, S, NH) or a carbonyl group (CO); R 2 and R 3, which are identical or different, represent a linear or branched alkyl group comprising from 1 to 6 carbon atoms; y denotes an integer ranging from 0 to 3; z denotes an integer ranging from 0 to 3; and - x denotes an integer from 0 to 2, - with z + x + y = 3.
[0003]
3. Composition according to Claim 2, characterized in that the organosilane (s) are chosen from compounds of formula (I) in which R 1 represents a linear alkyl group comprising from 7 to 18 carbon atoms and more particularly from 7 to 12. decarbon atoms or a C 1 -C 6 aminoalkyl, preferably C 2 -C 4, and more preferably R 1 represents an octyl group.
[0004]
4. Composition according to claim 2, characterized in that the organosilane (s) are chosen from the compounds of formula (I) in which R1 is a linear or branched, saturated or unsaturated C 1 -C 22 hydrocarbon-based chain substituted with a group amine NH2 or NHR (with R = C1 to C20 alkyl, especially C1 to C6, C3 to C40 cycloalkyl or C6 to C30 aromatic), and preferably R1 represents a C1 to C6 aminoalkyl group, more preferably C2 to C4.
[0005]
5. Composition according to any one of the preceding claims, characterized in that the organosilane (s) are chosen from octyltriethoxysilane (OTES), dodecyltriethoxysilane, octadecyltriethoxysilane, hexadecyltriethoxysilane and 3-aminopropyl triethoxysilane (APTES ); 2-aminoethyltriethoxysilane (AETES), 3-aminopropylmethyldiethoxysilane, N- (2-aminoethyl) -3-aminopropyltriethoxysilane, 3- (m-aminophenoxy) propyltrimethoxysilane, p-aminophenyltrimethoxysilane, N- (2- aminoethylaminomethyl) phenethyltrimethoxysilane, their oligomers and mixtures thereof; and preferably from octyltriethoxysilane (OTES), 3-aminopropyltriethoxysilane (APTES), their oligomers and mixtures thereof.
[0006]
6. Composition according to any one of the preceding claims, characterized in that the content of the organosilane (s) ranges from 0.1 to 15% by weight, preferably from 1 to 10% by weight, and more preferably from 2 to 8% by weight. % by weight, relative to the total weight of the composition.
[0007]
7. Composition according to any one of the preceding claims, characterized in that the cationic charge density of the cationic polymer or polymers is greater than or equal to 5 meq / g, and preferably ranges from 5 to 20 meq / g.
[0008]
8. Composition according to any one of the preceding claims, characterized in that the cationic polymer or polymers are chosen from: (1) vinylpyrrolidone / dialkylamino-alkyl (meth) acrylate copolymers quaternized or otherwise; (2) polymers consisting of piperazinyl units and straight or branched chain alkylene or hydroxyalkylene divalent groups, optionally interrupted by oxygen, sulfur, nitrogen or aromatic or heterocyclic rings, as well as oxidation and / or quaternization of these polymers; (3) water-soluble polyaminoamides prepared in particular by polycondensation of an acidic compound with a polyamine; (4) polyamino amide derivatives resulting from the condensation of polyalkylene polyamines with polycarboxylic acids followed by alkylation with difunctional agents; (5) polymers obtained by reacting a polyalkylene polyamine having two primary amine groups and at least one secondary amine group with a dicarboxylic acid selected from diglycolic acid and saturated aliphatic dicarboxylic acids having from 3 to 8 carbon atoms; (6) alkyldiallylamine or dialkyldiallylammonium cyclopolymers; (7) polycondensates of quaternary diammonium containing repeating units corresponding to formula (VI): wherein R10, R11, R12 and R13, which may be identical or different, are aliphatic, alicyclic or aliphatic aryl groups containing from 1 to 20 carbon atoms or lower aliphatic hydroxyalkyl groups, or R10, R11, R12 and R13, together or separately, together with the nitrogen atoms to which they are attached heterocycles optionally containing a second heteroatom other than nitrogen, or R10, R11, R12 and R13 represent a linear or branched C1-C6 alkyl group substituted with a nitrile, ester, acyl, amide or -CO- ORD or -CO-NH-RD wherein R is an alkylene group and D is a quaternary ammonium group; - A1 and B1 represent polymethylene groups containing from 2 to 20 carbon atoms, which may be linear or branched, saturated or unsaturated, and may contain, bound to or intercalated in the main chain, one or more aromatic rings, or one or more oxygen, sulfur or sulfoxide, sulfone, disulfide, amino, alkylamino, hydroxyl, quaternary ammonium, ureido, amide or ester groups, and - X- denotes an anion derived from a mineral or organic acid; (8) quaternary polyammonium polycondensates consisting of units of formula (VIII): ## STR2 ## Wherein R 18, R 19, R 20 and R 21, which may be identical or different, represent a hydrogen atom or a methyl, ethyl or propyl group; , P-hydroxyethyl, p-hydroxypropyl or -CH2CH2 (OCH2CH2) pOH, where p is 0 or an integer of 1 to 6, with the proviso that R18, R19, R20 and R21 do not simultaneously represent an atom of hydrogen, r and s, which may be identical or different, are integers between 1 and 6, q is 0 or an integer between 1 and 34, X denotes a halogen atom, and A is a group of a dihalide or is preferably -CH2-CH2-O-CH2-CH2-; (9) homopolymers or copolymers derived from acrylic or methacrylic acids and having units (IX), (X) and / or (XI): R22 (X) and / or R22 (XI) I CH2-C R22 0 CI CH2 - CI NH CH2- A2 i 0 = C X2-O = C R25 N + -R24 I 0 R23 0 II A2 X2-A2 II R25 "N + -R24, NR26 R27 (IX), R23 in which - R22 independently denotes H or CH3, A2 independently denotes a linear or branched alkyl group of 1 to 6 carbon atoms, or a hydroxyalkyl group of 1 to 4 carbon atoms, R23, R24, R25, which may be identical or different, independently denoting an alkyl group of 1 to 18; carbon atoms, or a benzyl group, - R26 and R27 represent a hydrogen atom or an alkyl group of 1 to 6 carbon atoms, and - X2- denotes an anion, for example methosulphate or halide such as chloride or bromide; (10) quaternary polymers of vinylpyrrolidone and vinylimidazole, (11) crosslinked polymers of methacryloyloxyalkyl (C 1 -C 4) trialkyl (C 1 -C 4) ammonium salts, and (12) mixtures thereof.
[0009]
9. Composition according to any one of the preceding claims, characterized in that the cationic polymer or polymers are chosen from families (6), (7), (9) and (11), as defined according to claim 8, and preferably chosen from: - crosslinked polymers of methacryloyloxyalkyl (C 1 -C 4) trialkyl (C 1 -C 4) ammonium salts, - alkyldiallylamine or dialkyldiallylammonium cyclopolymers, - homopolymers or copolymers derived from acrylic or methacrylic acids and comprising units (IX) as defined in claim 8 and mixtures thereof.
[0010]
10. Composition according to any one of the preceding claims, characterized in that the cationic polymer or polymers are chosen from 2-methacryloyloxyethyl trimethyl ammonium chloride, dimethyl diallyl ammonium chloride and mixtures thereof.
[0011]
11. Composition according to any one of the preceding claims, characterized in that the content of the cationic polymer or polymers ranges from 0.01 to 15% by weight, preferably from 0.05 to 10% by weight, and more preferably from 0.1 to 5% by weight, relative to the total weight of the composition.
[0012]
12. Composition according to any one of the preceding claims, characterized in that the cationic surfactant or surfactants chosen from: (a) the quaternary ammonium salts corresponding to the following general formula (XII): R28 / R30 R2 ( R31 (XII) in which R28 to R31, which may be the same or different, represent a linear or branched aliphatic group having from 1 to 30 carbon atoms, or an aromatic group such as aryl or alkylaryl, at least one of groups R28 to R3 1 denoting a group containing from 8 to 30 carbon atoms, preferably from 12 to 24 carbon atoms, and X- is an anion chosen from the group of halides, phosphates, acetates, lactates, alkyl (C 1-6) and C4) sulfates, (C1-C4) alkyl or (C1-C4) alkylsulfonates, (b) quaternary ammonium salts containing at least one ester function, and (c) mixtures thereof.
[0013]
13. Composition according to any one of the preceding claims, characterized in that the cationic surfactant or surfactants are chosen from cetyltrimethylammonium chloride, dipalmitoylethyl hydroxyethylammonium methosulfate and mixtures thereof, and more preferably cetyltrimethylammonium chloride.
[0014]
14. Composition according to any one of the preceding claims, characterized in that the content of the cationic surfactant or surfactants ranges from 0.05 to 10% by weight, preferably from 0.1 to 5% by weight, and more preferably from 0 to 5% by weight. , 3 to 2% by weight, relative to the total weight of the composition.
[0015]
15. Composition according to any one of the preceding claims, characterized in that it further comprises one or more fatty substances, preferably chosen from fatty alcohols, fatty esters, oils of mineral origin, vegetable oils from triglyceride type and mixtures thereof.
[0016]
16. Composition according to claim 15, characterized in that the content of the fatty substance or fats ranges from 1 to 30% by weight, preferably from 5 to 25% by weight, and more preferably from 10 to 20% by weight, by weight. relative to the total weight of the composition.
[0017]
17. A process for cosmetic treatment of keratinous fibers comprising applying to said keratinous fibers a composition as defined in any one of the preceding claims.
[0018]
18. Use of a composition, as defined according to any one of claims 1 to 16, to give the hair a cosmetic care remanent to shampoos.
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同族专利:
公开号 | 公开日
ES2886352T3|2021-12-17|
FR3029110B1|2018-03-09|
US20170259087A1|2017-09-14|
WO2016083578A1|2016-06-02|
BR112017010341B1|2021-01-12|
EP3223783A1|2017-10-04|
BR112017010341A2|2017-12-26|
RU2697860C2|2019-08-21|
KR20170086038A|2017-07-25|
RU2017122360A|2018-12-28|
EP3223783B1|2021-06-23|
RU2017122360A3|2019-02-01|
CN106999409A|2017-08-01|
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2016-06-03| PLSC| Publication of the preliminary search report|Effective date: 20160603 |
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优先权:
申请号 | 申请日 | 专利标题
FR1461567A|FR3029110B1|2014-11-27|2014-11-27|COSMETIC COMPOSITION COMPRISING AN ORGANOSILANE, A CATIONIC SURFACTANT AND A CATIONIC POLYMER HAVING A CHARGE DENSITY OF MORE THAN 4 MEQ / G|
FR1461567|2014-11-27|FR1461567A| FR3029110B1|2014-11-27|2014-11-27|COSMETIC COMPOSITION COMPRISING AN ORGANOSILANE, A CATIONIC SURFACTANT AND A CATIONIC POLYMER HAVING A CHARGE DENSITY OF MORE THAN 4 MEQ / G|
KR1020177013302A| KR20170086038A|2014-11-27|2015-11-27|Cosmetic composition comprising an organosilane, a cationic surfactant and a cationic polymer having charge density greater than or equal to 4 meq/g|
BR112017010341-9A| BR112017010341B1|2014-11-27|2015-11-27|for the care of keratin fibers, methods for the cosmetic treatment of keratin fibers, and, use of a composition|
PCT/EP2015/077927| WO2016083578A1|2014-11-27|2015-11-27|Cosmetic composition comprising an organosilane, a cationic surfactant and a cationic polymer having charge density greater than or equal to 4 meq/g|
RU2017122360A| RU2697860C2|2014-11-27|2015-11-27|Cosmetic composition containing an organosilane, a cationic surfactant and a cationic polymer having a charge density of 4 meq/g or more|
US15/529,266| US20170259087A1|2014-11-27|2015-11-27|Cosmetic composition comprising an organosilane, a cationic surfactant and a cationic polymer having charge density greater than or equal to 4 meq/g|
ES15805418T| ES2886352T3|2014-11-27|2015-11-27|Cosmetic composition comprising an organosilane, a cationic surfactant, and a cationic polymer having a charge density greater than or equal to 4 meq / g|
EP15805418.9A| EP3223783B1|2014-11-27|2015-11-27|Cosmetic composition comprising an organosilane, a cationic surfactant and a cationic polymer having charge density greater than or equal to 4 meq/g|
CN201580064923.6A| CN106999409A|2014-11-27|2015-11-27|The cosmetic composition of cationic polymer comprising organosilan, cationic surfactant and with more than or equal to 4meq/g charge density|
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