New hair protective emulsions against intense heat

Abstract

The subject of the invention is a novel cosmetic emulsion comprising at least one poly(farnesene) polymer having a number-average molar mass greater than or equal to 10,000 g / mol and less than or equal to 120,000 g / mol, partially or totally hydrogenated and / or functionalized with hydroxyl radicals.

Description

Title of the invention: New emulsions for protecting hair against intense heat Technical field of the invention

[0001] The present invention relates to the use in cosmetics of partially or totally hydrogenated poly(farnesenes). It relates more particularly to the cosmetic treatment of hair. Technological background

[0002] When drying or styling, hair may be exposed to heat, by the hot air of hair dryers, or by curling irons, straightening irons, heated combs or heated brushes. This exposure induces thermal stress which may result in modifications of the polypeptide chains of the keratin of the hair, more particularly affecting their stereochemical conformations and certain intermolecular bonds, and consequently altering their internal structure. Such an alteration leads to both a degradation of their appearance, for example a reduction in their shine, and a degradation of their sensory properties, for example reduced softness. In addition, external damage to the hair is sometimes observed such as the lifting of the cuticles and / or the creation of blisters on the individual hair fibers.This damage causes increased friction between hair fibers and weakens the hair, which sometimes leads to deterioration of the outer surface of the hair, if not to breakage.

[0003] Many compositions have been developed and marketed to protect hair from the negative effects associated with exposure of the hair to high temperatures. They form a coating on the hair fibers and thus reduce the effect of heat within them. These compositions include film-forming polymers, such as those derived from the polymerization of N-vinyl pyrrolidones, vinyl alcohols or vinyl acetate.

[0004] The international application published under number WO 2014 / 95210A1 discloses a composition comprising at least one non-ionic polymer, such as a mixture of copolymers derived from N-vinyl pyrrolidones and / or vinyl acetate, with at least one cationic polymer such as, for example, the cationic polymer whose INCI name is Polyquatemium-46. The presence of the cationic polymer serves to reduce or eliminate the sticky sensation induced by the film-forming polymer and to limit the presence of unsightly white residues on the hair.

[0005] Silicone derivatives are also known as multifunctional ingredients in hair care compositions to, among other properties, prevent against heat damage. For example, there are copolymers of the "aminoglycol" type, such as the copolymer identified by the INCI name: "bis(C13-C15 alkoxy) PG-amodimethicone" and marketed under the name "Dow Corning 8500 conditioning agent". Hair care compositions containing them are stable, spread easily on the hair and form a protective film that prevents water loss due to heat exposure, at the level of the hair shaft.

[0006] Polymers of the siloxane family are also known to protect hair exposed to heat. Among these, there is for example poly(dimethylsiloxane) of formula: -[O-Si(CH3)2]„-, commonly called PDMS or dimethicone, or dimethiconols characterized by a structure of formula: HO-Si(CH3)2-[O-Si(CH3)2]„-Si(CH3)2-OH. Mixtures of dimethicone and dimethiconol are widely used in hygiene formulas (notably shampoos) and hair care products.

[0007] As silicone compounds providing protection for hair exposed to heat, there are also those from the aminosilane family such as those described in the French patent application published under number FR 3,038,513 A1, and those described in the American patent application published under number US 2018 / 161266 A2. The international application published under number WO 2021 / 260486 A1, discloses for example compositions comprising a film-forming polymer of the aminosilane family chosen from Polysilicone-35, Polysilicone-33, Polysilicone-29, Polysilicone-28, Polysilicone-25, Polysilicone-24, Polysilicone-22, Polysilicone-19, Polysilicone-18, Polysilicone-14 and Polysilicone-3, alone or as a mixture and a silane derivative of a hydrolyzed protein or of a peptide or of an amino acid, as described in the international patent application.

[0008] However, the aforementioned polymers are only slightly or not at all biodegradable and are derived from raw materials of fossil origin.

[0009] The inventors therefore set out to develop a new alternative solution to the previously mentioned copolymers which, while ensuring sufficient protection of the hair during exposure to heat, has environmental characteristics which comply with current and future regulations, and which comply with consumer requirements in this area. Statement of the invention

[0010] According to a first aspect, the invention relates to an emulsion (E) of an aqueous phase (A) and a fatty phase (G) characterized in that it comprises for 100% of its mass: - From 50% to 98% by mass of said aqueous phase (A), and - From 2% to 50% by mass of said fatty phase (G), in that said fatty phase (G) comprises, for 100% of its mass: • From 10% to 80% by mass and preferably from 10% to 70% by mass, of a composition (C) comprising for 100% of its mass, • from 10% by mass to 90% by mass of at least one poly(famesene) polymer having a number-average molar mass greater than or equal to 10,000 g / mol and less than or equal to 120,000 g / mol, and in particular having a number-average molar mass greater than or equal to 10,000 g / mol and less than or equal to 90,000 g / mol, said poly(famesene) polymer being partially or totally hydrogenated and / or functionalized with hydroxyl radicals, and • from 10% by mass to 90% by mass of a mixture (M) of hydrocarbons in which at least 94% by mass of said hydrocarbons contain from fifteen to nineteen carbon atoms, • From 0.5% to 20% by mass and preferably from 1% to 15% by mass of an emulsifying surfactant (S) or a mixture of emulsifying surfactants (Ms) of the oil-in-water type or of the water-in-oil type, and • From 0% to 89.5% by mass, preferably from 15% to 89% by mass, of an oil or several oils and / or a wax, said wax being different from said composition (C).

[0011] In the context of the present invention, all the constituent ingredients of the emulsion as defined above in its broadest aspect and below in its more particular and / or preferred aspects, whether optional or essential, are "cosmetically acceptable", which means, according to Directive No. 76 / 768 / EEC of the Council of the European Economic Community of July 27, 1976, amended by Directive No. 93 / 35 / EEC of June 14, 1993, that they are intended to be placed in contact with the various parts of the human body (epidermis, hair and capillary system, nails, lips and genitals) or with the teeth and oral mucous membranes with a view, exclusively and mainly, to cleaning them, perfuming them, modifying their appearance and / or correcting body odors and / or protecting them or maintaining them in good condition.A cosmetically acceptable medium may thus conventionally contain water, one or more cosmetically acceptable organic solvents, a mixture of water and one or more organic solvents. The cosmetically acceptable solvents may more particularly be chosen from polyhydric alcohols such as, for example, glycerol, diglycerol, glycerol oligomers, ethylene glycol, propylene glycol, hexylene glycol, diethylene glycol, xylitol, erythritol, sorbitol, or water-soluble alcohols.

[0012] The poly(farnesene) polymer(s) included in composition (C) as defined above are known and their chemical structure is explained in the international application published under number WO 2020 / 144440 AL. They can be obtained by the method described in the international application published under number WO 2018 / 052709 Al.

[0013] In the context of the present invention, the poly(famese) polymer(s) included in composition (C) as defined above, more particularly have a number-average molar mass greater than or equal to 20,000 g / mol and less than or equal to 85,000 g / mol, even more particularly greater than or equal to 30,000 g / mol and less than or equal to 80,000 g / mol.

[0014] According to a very particular embodiment of the present invention, the poly(farnesene) polymer included in composition (C) as defined above has a number-average molar mass of 71,000 g / mol and it is completely hydrogenated and functionalized with hydroxyl radicals.

[0015] In the context of the present invention, the term "mixture (M) of hydrocarbons" denotes a mixture of branched alkanes, and / or linear alkanes and / or cycloalkanes. By "linear alkanes" comprising from fifteen to nineteen carbon atoms, we denote n-pentadecane, n-hexadecane, n-heptadecane, n-octadecane and n-nonadecane; by "branched alkanes" (or iso-alkanes) comprising from fifteen to nineteen carbon atoms, we denote more particularly 2-methyl tetradecane (or isopentadecane), 2-methyl pentadecane (or isohexadecane), 2-methyl hexadecane (or isoheptadecane), 2-methyl heptadecane (or iso-octadecane) and 2-methyl octadecane (or isononadecane); by “cycloalkanes containing from fifteen to nineteen carbon atoms” is meant more particularly saturated hydrocarbons comprising at least one saturated cyclic hydrocarbon group optionally substituted by one or more linear or branched alkyl radicals.

[0016] These mixtures can be obtained by conversion of a biomass as disclosed in the international patent application published under number WO 2020 / 144440 A1.

[0017] According to a particular embodiment of the present invention, the mixture (M) included in the composition (C) as defined above, comprises for 100% of its mass, a mass proportion of branched alkanes greater than or equal to 80% and less than or equal to 100%, and more particularly greater than or equal to 90% and less than or equal to 100%; a mass proportion of linear alkanes greater than or equal to 0% and less than or equal to 15%, and more particularly greater than or equal to 0% and less than or equal to 10%; and a mass proportion of cycloalkanes greater than or equal to 0% and less than or equal to 5%, preferably less than or equal to 1%.

[0018] According to a more particular embodiment of the present invention, the mixture (M) included in the composition (C) as defined above, is chosen from the following hydrocarbon mixtures: - a mixture of saturated hydrocarbons consisting of, for 100% of its mass, 98.9% iso-alkanes containing from fourteen to nineteen carbon atoms and 1.1% linear alkanes containing from fourteen to nineteen carbon atoms, marketed under the brand name Emogreen™ L15; - a mixture of saturated hydrocarbons consisting of, for 100% of its mass, 3.8% of linear alkanes containing from fifteen to nineteen carbon atoms, 96.2% of iso-alkanes containing from fifteen to nineteen carbon atoms, and less than 0.1% of cycloalkanes containing from fifteen to nineteen carbon atoms, marketed under the brand name Emogreen™L19; and - a mixture of saturated hydrocarbons, consisting of, for 100% of its mass 15% to 20% by mass of alkanes (linear, isoalkanes and cycloalkanes) containing 17 carbon atoms, 70% to 75% by mass of alkanes (linear, isoalkanes and cycloalkanes) containing 18 carbon atoms, 4% to 6% by mass of alkanes (linear, isoalkanes and cycloalkanes) containing 19 carbon atoms, marketed under the brand name Emogreen™L19.

[0019] Composition (C) as defined above can be prepared by simple mixing of said poly(farnesene) polymer and of the mixture (M), at a temperature between 20°C and 60°C, with mechanical stirring equipped with an anchor or turbine type rotor, at a speed between 20 rpm and 500 rpm.

[0020] In the context of the present invention, the oil or oils optionally included in the fatty phase (G) as defined above are chemical substances or mixtures of chemical substances insoluble in water, and appearing in a liquid form at a temperature of 25°C. These oils may be of animal origin, of vegetable origin, or be synthetic oils. - As an oil of animal origin used in the context of the present invention, there is for example squalene or squalane; - As an oil of plant origin used in the context of the present invention, there are for example phytosqualane, sweet almond oil, coconut oil, castor oil, jojoba oil, olive oil, rapeseed oil, peanut oil, sunflower oil, wheat germ oil, corn germ oil, soybean oil, cottonseed oil, alfalfa oil, poppy oil, pumpkin oil, evening primrose oil, millet oil, barley oil, rye oil, safflower oil, candlenut oil, passionflower oil, hazelnut oil, palm oil, shea butter, apricot kernel oil, calophyllum oil, sysymbrium, avocado oil, calendula oil, sesame oil, meadowsweet oil, macadamia kiwi oil, borage oil, blackcurrant seed oil, coffee oil, pistachio oil, peach kernel oil, seed oil raspberry, strawberry seed oil, melon oil, blueberry seed oil, argan oil, plum oily extract, pomegranate oil, papaya oil, coconut milk oil, oils from flowers or vegetables and ethoxylated vegetable oils; - As synthetic oil used in the context of the present invention, there are for example fatty acid esters such as butyl myristate, propyl myristate, cetyl myristate, isopropyl palmitate, butyl stearate, hexadecyl stearate, isopropyl stearate, octyl stearate, isocetyl stearate, dodecyl oleate, hexyl laurate; esters derived from lanolic acid, such as isopropyl lanolate, isocetyl lanolate, glycerol triheptanoate, alkylbenzoates, hydrogenated oils, polyalphaolefins, polyolefins such as polyisobutene, hydrogenated polydecene or hydrogenated polyisobutene, marketed in France by the company Ets B. Rossow et Cie under the name PARLEAM - POLYSYNLANE™, cited in: Michel and Irene Ash; Thesaurus of Chemical Products, Chemical Publishing Co, Inc.1986 Volume I, page 211 (ISBN 0 7131 3603 0); silicone oils such as dimethylpolysiloxanes, methylphenylpolysiloxanes, amine-modified silicones, fatty acid-modified silicones, alcohol-modified silicones, alcohol- and fatty acid-modified silicones, polyether-modified silicones, epoxy-modified silicones, fluorine-modified silicones, cyclic silicones, and alkyl-modified silicones.

[0021] In the context of the present invention, the wax optionally included in the fatty phase (G) as defined above, is a chemical substance or a mixture of chemical substances insoluble in water and having a solid appearance at a temperature of 45°C. There are for example beeswax, carnauba wax, candelilla wax, ouricoury wax, Japan wax, cork fiber wax, sugar cane wax, jojoba wax, blackcurrant flower wax, narcissus flower wax, orange blossom wax, orange wax, rice wax, lignite waxes, microcrystalline waxes, lanolin wax; ozokerite; polyethylene wax, silicone waxes; vegetable waxes; fatty alcohols and fatty acids solid at room temperature and glycerides solid at room temperature.

[0022] The subject of the invention is in particular an emulsion (Ei) corresponding to said emulsion (E) as defined above, characterized in that it comprises for 100% of its mass: - From 50% to 90% by mass of said aqueous phase (A), and - From 10% to 50% by mass of a fatty phase (GJ) corresponding to said fatty phase (G) and comprising for 100% of its mass: • From 10% to 80% by mass and preferably from 10% to 70% by mass, of said composition (C), • From 0.5% to 20% by mass and preferably from 1% to 15% by mass, of an emulsifying surfactant (Si) of the oil-in-water type or of a mixture of emulsifying surfactants (MSi), said mixture being of the oil-in-water type, and • From 0% to 89.5% by mass and preferably from 15% to 89% by mass, of said oil or oils and / or of said wax, said wax being different from said composition (C).

[0023] By emulsifying surfactant (Si) of the oil-in-water type mixture of emulsifying surfactants (MSi) of the oil-in-water type present in the fatty phase (GJ) of the emulsion (Ei) as defined above, is meant a chemical substance or a mixture of chemical substances which makes it possible to stabilize the droplets of said fatty phase (Gi) in dispersion in the continuous aqueous phase (A). Examples of said emulsifying surfactant (Si) or said mixture of emulsifying surfactants (MSi) include in particular: - Polysorbates resulting from the ethoxylation reaction between one molar equivalent of sorbitan esters, such as sorbitan laurate, sorbitan palmitate, sorbitan stearate, sorbitan isostearate or sorbitan oleate with 5 to 20 molar equivalents of ethylene oxide; - Products resulting from the ethoxylation reaction between one molar equivalent of a fatty acid, such as palmitic acid, myristic acid, lauric acid, stearic acid, isostearic acid or oleic acid, with 5 to 40 molar equivalents of ethylene oxide; - Products resulting from the esterification reaction between a fatty acid, such as palmitic acid, myristic acid, lauric acid, stearic acid, isostearic acid, oleic acid, arachidic acid or behenic acid with 3 to 20 molar equivalents of glycerol;

[0024] The invention more particularly relates to an emulsion (EJ as defined above, characterized in that it comprises, for 100% of its mass: - From 60% to 90% by mass and preferably from 70% to 90% by mass of said aqueous phase (A), and - From 10% to 40% by mass and preferably from 10% to 30% of said fatty phase (GJ.

[0025] The invention also relates to an emulsion (E2) corresponding to said emulsion (E) as defined above, comprising for 100% of its mass: - From 60% to 98% by mass of said aqueous phase (A), and - From 2% to 40% by mass, of a fatty phase (G2), corresponding to said fatty phase (G) and comprising, for 100% of its mass: • From 10% to 80% by mass and preferably from 10% to 70% by mass of said composition (C), • From 0.5% to 20% by mass and preferably from 1% to 15% by mass, of an emulsifying surfactant (S2) of the water-in-oil type or of a mixture of emulsifying surfactants (MS2), said mixture being of the water-in-oil type, and • From 0% to 89.5% by mass and preferably from 15% to 89% by mass, of said oil or oils and / or of said wax, said wax being different from said composition (C).

[0026] Among the water-in-oil type emulsifying surfactants (S2) capable of being used in the context of the present invention, there are in particular: - lipoamino acids and their salts and lipopeptides and their salts; sorbitan esters such as sorbitan laurate, palmitate, stearate, oleate, sesquioleate, trioleate, and isostearate; glycerol esters such as glycerol laurate, palmitate, stearate, oleate, sesquioleate, trioleate, and isostearate; - polyglycol, polyglycerol or polyol esters such as laurate, palmitate, stearate, oleate, sesquioleate, trioleate, isostearate, polyhydroxystearates of polyglycols or polyglycerol such as HYPERMER™ B246, ARLACEL™ P135, DEHYMULS™ PGPH and DECAGLYN™ 5HS, - polyethylene glycol-alkyl glycol copolymers such as PEG-45 dodecyl glycol copolymer such as ELFACOS ST 9™; - sucrose esters, ethoxylated or non-ethoxylated methylglucoside esters, - ethoxylated fatty acids and fatty alcohols; - anionic emulsifiers such as decylphosphate or cetearyl sulfate; aluminum polyoxystearate, such as MANALOX®, magnesium stearate and aluminum stearate; and - alkylpolyglycosides, compositions of alkylpolyglycosides and fatty alcohols.

[0027] As an example of alkylpolyglycoside compositions, there is the composition (CAi) represented by the formula: RrO-(G)xH in which G represents the residue of a reducing sugar selected from glucose or xylose, RrO- is linked to G by the carbon anomeric of the saccharide residue, so as to form an acetal function, x represents a decimal number greater than or equal to 1.05 and less than or equal to 2.5 and Ri represents an aliphatic radical chosen from the radicals n-dodecyl, n-tetradecyl, n-hexadecyl, n-octadecyl, n-eicosyl, n-docosyl, 2-hexyl decyl, 2-octyl decyl, 2-hexyl dodecyl, 2-octyl dodecyl and 2-decyl tetradecyl said composition (CAi) consisting of a mixture of compounds represented by the formulae RrO-(G)iH, RrO-(G)2-H, Ri-O-(G)3-H and R1-O-(G)4-H and Ri-O-(G)5-H, in the respective molar proportions ab a2, a3, a4 and a5, such that the sum ai+a2+a3+a4+a5 is equal to 1 and the sum a1+2a2+3a3+4a4+5a5 is equal to x.

[0028] As an example of compositions of alkylpolyglycosides and fatty alcohols, there is the composition (CA2) comprising for 100% of its mass: - From 10% to 50% by mass and more particularly from 20% to 30% by mass of said composition (CAi) as defined above and - From 90% to 50% by mass and more particularly from 80% to 70% by mass of at least one fatty alcohol of formula: R'rOH, in which R'b identical to or different from RB represents a radical chosen from the radicals n-dodecyl, n-tetradecyl, n-hexadecyl, n-octadecyl, n-eicosyl, n-docosyl, 2-hexyl decyl, 2-octyl decyl, 2-hexyl dodecyl, 2-octyl dodecyl or 2-decyl tetradecyl; R\ represents more particularly the radical 2-octyl dodecyl.

[0029] As another example of compositions of alkylpolyglycosides and fatty alcohols, there is the composition (CA3) comprising for 100% of its mass: - from 15% to 25% by mass of the composition (CAi), - from 55% to 65% by mass of at least one fatty alcohol of formula R' 1-OH in which R' 1 represents the 2-octyl dodecyl radical; and - from 10% to 30% by mass of at least one polyglycol poly(hydroxystearate) represented by the formula Z2-O-[CH2-CH(R4)-O]y2-Z'2, in which y2 represents an integer greater than or equal to 2 and less than or equal to 50, R represents the hydrogen atom, the methyl radical or the ethyl radical, Z2 represents a radical of formula: [Chem 1]

[0030] According to a more particular aspect, said emulsifying surfactant (S2) of the water-in-oil type or said mixture of emulsifying surfactants (MS2), is chosen from alkylpolyglycoside compositions, alkylpolyglycoside and fatty alcohol compositions, polyglycerol esters, alkoxylated polyglycerol esters, polyglycol polyhydroxystearates, polyglycerol polyhydroxystearates, alkoxylated polyglycerol polyhydroxystearates, polyethylene glycol-alkyl glycol copolymers.

[0031] The invention more particularly relates to an emulsion (E2) as defined above, characterized in that it comprises, for 100% of its mass: - From 60% to 95% by mass, preferably from 60% to 90% by mass and in particular from 60% to 85% by mass, of said aqueous phase (A), and - From 5% to 40% by mass, preferably from 10% to 40% by mass and in particular from 15% to 40% by mass of said fatty phase (G2).

[0032] According to another particular embodiment of the present invention, said poly(famesene) polymer included in the emulsions (E), (EJ or (E2) as defined previously, has a number-average molar mass greater than or equal to 20,000 g / mol and less than or equal to 90,000 g / mol and in particular greater than or equal to 40,000 g / mol and less than or equal to 80,000 g / mol.

[0033] According to another particular embodiment of the present invention, said mixture (M) of hydrocarbons included in the emulsions (E), (Ei) or (E2), as defined previously, is chosen from the following hydrocarbon mixtures: - a mixture of saturated hydrocarbons comprising, for 100% of its mass, 1.1% of linear alkanes containing from fourteen to nineteen carbon atoms and 98.9% of iso-alkanes containing from fourteen to nineteen carbon atoms, - a mixture of saturated hydrocarbons comprising, for 100% of its mass, 3.8% of linear alkanes containing from fifteen to nineteen carbon atoms, 96.2% of iso-alkanes containing from fifteen to nineteen carbon atoms, and less than 0.1% of cycloalkanes containing from fifteen to nineteen carbon atoms, and - a mixture of saturated hydrocarbons, comprising for 100% of its mass 15% to 20% by mass of alkanes (linear, isoalkanes and cycloalkanes) containing 17 carbon atoms, 70% to 75% by mass of alkanes (linear, isoalkanes and cycloalkanes) containing 18 carbon atoms, 4% to 6% by mass of alkanes (linear, isoalkanes and cycloalkanes) containing 19 carbon atoms.

[0034] According to another particular embodiment of the present invention, the emulsion (E2) as defined above, is characterized in that said aqueous phase (A) comprises for 100% of its mass, from 0.5% by mass to 10% by mass and preferably from 0.5% by mass to 5% by mass of a crosslinked anionic polyelectrolyte (P) or of a mixture of crosslinked anionic polyelectrolytes (MP).

[0035] By crosslinked anionic polyelectrolyte (P), we mean, in the preceding definition, a non-linear crosslinked anionic polyelectrolyte, present in the network state three-dimensional insoluble in water, but swellable in water and leading to the production of a chemical gel.

[0036] The crosslinked anionic polyelectrolyte (P) optionally in the emulsion (E2) as defined above, comprises in particular: - a proportion greater than or equal to 25 mol% of monomeric units derived from 2-methyl 2-[(l-oxo 2-propenyl) amino] 1-propanesulfonic acid in free acid form or partially or totally salified, and optionally; - a proportion greater than 0 mol% and less than or equal to 75 mol% of monomeric units derived from at least one monomer chosen from the elements of the group consisting of acrylamide, N,N-dimethyl acrylamide; methacrylamide or N-isopropyl acrylamide; - a proportion greater than 0 mol% and less than or equal to 20 mol%, more particularly greater than 0 mol% and less than or equal to 10 mol% of monomeric units derived from at least one monomer chosen from (2-hydroxyethyl) acrylate, (2,3-dihydroxypropyl) acrylate, (2-hydroxyethyl) methacrylate, (2,3-dihydroxypropyl) methacrylate, and vinyl pyrrolidone; - a proportion greater than 0 mol% and less than or equal to 75 mol% of monomeric units derived from at least one monomer chosen from acrylic acid, methacrylic acid, 2-carboxyethyl acrylic acid, itaconic acid, maleic acid, 3-methyl 3- [(1-oxo 2-propenyl) amino] butanoic acid, the carboxylic function of said monomers being in free acid form, partially salified or totally salified; - a proportion greater than 0 mol% and less than or equal to 5 mol% of at least one monomer of formula H2C=C(CH3)CC(=O)-[CH2-CH2-O]nR, in which R represents a linear or branched alkyl radical containing from eight to twenty carbon atoms and n represents an integer greater than or equal to zero and less than or equal to twenty; and / or - a proportion greater than 0 mol% and less than or equal to 1 mol%, more particularly greater than or equal to 0.005 mol% and less than or equal to 0.25 mol% of monomeric units derived from at least one diethylenic or polyethylene crosslinking monomer (AR).

[0037] For the purposes of the present invention, the term "salified" indicates that the acid function present in a monomer is in an anionic form associated in the form of a salt with a cation, in particular alkali metal salts, such as sodium or potassium cations, or as nitrogenous base cations such as salt ammonium salt, lysine salt or monoethanolamine salt (HOCH2-CH2-NH4+). These are preferably sodium or ammonium salts.

[0038] By at least one diethylenic or polyethylene crosslinking monomer (AR), in the definition of said crosslinked anionic polyelectrolyte (P), is meant in particular a monomer chosen from the elements of the group consisting of methylene-bis(acrylamide), ethylene glycol dimethacrylate, diethylene glycol diacrylate, ethylene glycol diacrylate, diallyl urea, triallylamine, trimethylol propanetriacrylate, diallyoxyacetic acid or one of its salts such as sodium diallyloxyacetate, or a mixture of these compounds; and more particularly a monomer chosen from ethylene glycol dimethacrylate, triallylamine, trimethylol propanetriacrylate or methylene-bis(acrylamide) or a mixture of these compounds.

[0039] The crosslinked anionic polyelectrolyte (P) optionally in the emulsion (E2) as defined above, may also comprise various additives, such as complexing agents, transfer agents or chain limiting agents.

[0040] According to this particular embodiment of the present invention, said crosslinked anionic polyelectrolyte (P) or said crosslinked anionic polyelectrolytes constituting the mixtures (MP), are chosen from the following anionic polyelectrolytes: - a homopolymer of 2-methyl 2-[(l-oxo 2-propenyl) amino] 1-propanesulfonic acid partially or totally salified in the form of sodium salt or ammonium salt, crosslinked by triallylamine and / or methylene-bis(acrylamide); - a copolymer of 2-methyl 2-[(l-oxo 2-propenyl) amino] 1-propanesulfonic acid (y), partially or totally salified in the form of sodium salt or ammonium salt and acrylic acid (6) partially or totally salified in the form of sodium salt or ammonium salt, crosslinked by triallylamine and / or methylene-bis(acrylamide); in particular said copolymer in which the molar proportions of monomers (y) and (6) are as follows: • 30% < (y) < 90% or more particularly 40% < (y) < 90% and • 10% < (ô) < 70% or more particularly 10% < (ô) < 60%; - a copolymer of 2-methyl 2-[(l-oxo 2-propenyl) amino] 1-propanesulfonic acid (y) partially or totally salified in the form of sodium salt or ammonium salt and acrylamide (e), crosslinked by triallylamine and / or methylene-bis(acrylamide); in particular said copolymer in which the molar proportions of monomers (y), and (Ç) are as follows: • 30% < (y) < 90%, and • 10% < (e) < 70%; a copolymer of 2-methyl 2-[(l-oxo 2-propenyl) amino] 1-propanesulfonic acid (y) partially or totally salified in the form of sodium salt, and hydroxyethylacrylate (Ç), crosslinked by triallylamine and / or methylene-bis(acrylamide); in particular said copolymer in which the molar proportions of monomers (y), and (Ç) are as follows: • 30% < (y) < 90%, and • 10% < (Ç) < 70%, a terpolymer of 2-methyl 2-[(l-oxo 2-propenyl) amino] 1-propanesulfonic acid (y) partially or totally salified in the form of sodium salt or ammonium salt, acrylic acid (6) partially or totally salified in the form of sodium salt or ammonium salt and acrylamide (e), crosslinked by triallylamine and / or methylenebis(acrylamide); in particular said terpolymer in which the molar proportions of monomers (y), (6) and (e) are as follows: • 30% < (y) < 45%, • 2% < (ô) < 10%, and more particularly 2% < (ô) < 8%, and • 45% < (e) < 68%, and more particularly 47% < (ô) < 68%; a terpolymer of 2-methyl 2-[(l-oxo 2-propenyl)amino] 1-propanesulfonic acid (y) partially or totally salified in the form of sodium salt or ammonium salt, N,N dimethylacrylamide (|3) and tetraethoxylated lauryl methacrylate (a), crosslinked by trimethylolpropanetriacrylate and / or triallylamine and / or methylene-bis(acrylamide); in particular said terpolymer in which the molar proportions of monomers (y), (|3) and (a) are as follows: • 60% < (y) < 80%, • 15% < (|3) < 39.5%, and • 0.5% < (a) < 5%; a tetrapolymer of 2-methyl 2-[(l-oxo 2-propenyl)amino] 1-propanesulfonic acid (y) partially or totally salified in the form of sodium salt or ammonium salt, N,N dimethylacrylamide (|3), lauroyl methacrylate (q) and stearoyl methacrylate (p), crosslinked by trimethylolpropanetriacrylate and / or triallylamine and / or methylene-bis(acrylamide); in particular said tetrapolymer in which the molar proportions of monomers (y), (|3), (q) and (p) are as follows: • 60% < (y) < 80%, • 15% < (|3) < 39%, • 0.5% < (il) < 2.5%, and • 0.5% < (p) < 2.5%.

[0041] The emulsions (E), (El) and (E2) may further comprise excipients and / or active ingredients usually used in the field of formulations intended to be applied to the hair or scalp. This is why, according to another particular embodiment of the present invention, the emulsions (E), (Ei) and (E2), as defined above, further comprise one or more auxiliary compounds chosen from foaming and / or detergent surfactants, thickening and / or gelling surfactants, thickening and / or gelling agents, stabilizing agents, film-forming compounds, solvents and cosolvents, hydrotropic agents, plasticizing agents, emulsifying and co-emulsifying agents, opacifying agents, pearlescent agents, superfatting agents, sequestering agents, chelating agents, antioxidant agents, perfumes, essential oils, preservatives, conditioning agents,deodorant agents, bleaching agents intended for bleaching hair and skin, active ingredients intended to provide a treatment and / or protective action on the skin or hair, sun filters, mineral fillers or pigments, particles providing a visual effect or intended for the encapsulation of active ingredients, exfoliating particles, texturizing agents, optical brighteners or insect repellents.

[0042] As examples of foaming and / or detergent surfactants, optionally present in the emulsions (E), (Ei) and (E2) as defined above, there are topically acceptable anionic, cationic, amphoteric or non-ionic foaming and / or detergent surfactants usually used in this field of cosmetics.

[0043] Among the “cosmetically acceptable” foaming and / or detergent anionic surfactants, there are the salts of alkali, alkaline earth, or ammonium metals, of amines, of amino alcohols, of alkyl ether sulfates, alkyl sulfates, alkylamidoether sulfates, alkylarylpolyether sulfates, monoglyceride sulfates, of alpha-olefinsulfonates, of paraffin sulfonates, of alkyl phosphates, of alkyl ether phosphates, of alkyl sulfonates, of alkylamide sulfonates, of alkylaryl sulfonates, of alkyl carboxylates, of alkylsulfosuccinates, of alkyl ether sulfosuccinates, of alkylamide sulfosuccinates, of alkyl sulfoacetates, of alkyl sarcosinates, of acyl isethionates, of N-acyl taurates, of acyl lactylates, N-acylated derivatives of amino acids, N-acylated derivatives of peptides, N-acylated derivatives of proteins, or fatty acids.

[0044] Among the “cosmetically acceptable” foaming and / or detergent amphoteric surfactants, there are alkylbetaines, alkylamidobetaines, sultaines, alkylamidoalkylsulfobetaines, imidazoline derivatives, phosphobetaines, amphopolyacetates and amphopropionates.

[0045] Among the “cosmetically acceptable” foaming and / or detergent cationic surfactants, there are quaternary ammonium derivatives.

[0046] Among the “cosmetically acceptable” foaming and / or detergent non-ionic surfactants, there are alkylpolyglycosides comprising an aliphatic radical, linear or branched, saturated or unsaturated, and comprising from 8 to 12 carbon atoms; castor oil derivatives, polysorbates, copra amides and N-alkyl amines.

[0047] Among the “cosmetically acceptable” thickening and / or gelling surfactants, there are in particular: - optionally alkoxylated alkylpolyglycoside fatty esters, such as ethoxylated methylpolyglucoside esters such as PEG 120 methyl glucose trioleate and PEG 120 methyl glucose dioleate marketed respectively under the names GLUCAMATE™ LT and GLUMATE™ DOE120; - alkoxylated fatty esters such as PEG 150 pentaerythritol tetrastearate and PEG 55 propylene glycol oleate marketed respectively under the names CROTHIX™ DS53 and ANTIL™ 141; - fatty chain polyalkylene glycol carbamates such as PPG 14 laureth isophoryl dicarbamate and PPG 14 palmeth 60 hexyl dicarbamate respectively marketed under the names ELFACOS™ T211 and ELFACOS™ GT2125.

[0048] Among the “cosmetically acceptable” emulsifying surfactants, there are in particular non-ionic surfactants, anionic surfactants, cationic surfactants.

[0049] As “cosmetically acceptable” emulsifying nonionic surfactants, mention may be made of fatty acid esters of sorbitol, for example the products marketed under the names MONTANE™80 and MONTANE™85 and MONTANE™60; ethoxylated castor oil and ethoxylated hydrogenated castor oil, for example the product marketed under the name SIMULSOL™ 989; compositions comprising glycerol stearate and poly(ethoxylated) stearic acid with between 5 moles and 150 moles of ethylene oxide, for example the composition comprising (ethoxylated) stearic acid with 135 moles of ethylene oxide and glycerol stearate marketed under the name SIMULSOL™ 165; ethoxylated sorbitan esters, for example products marketed under the name MONTANOX™; mannitan esters; ethoxylated mannitan esters; sucrose esters; methylglucoside esters.

[0050] Examples of “cosmetically acceptable” emulsifying anionic surfactants include decylphosphate, cetylphosphate marketed under the name AMPHISOL™, glyceryl stearate citrate; cetearyl sulfate, the arachidyl / behenyl phosphates and arachidyl / behenyl alcohols composition marketed under the name SENSANOV™ WR, sodium stearate or triethanolammonium stearate, N-acylated derivatives of salified amino acids such as, for example, stearoyl glutamate.

[0051] As examples of “cosmetically acceptable” emulsifying cationic surfactants, mention may be made of amine oxides, quaternium-82 and the surfactants described in the international application published under number WO 96 / 00719 and mainly those whose fatty chain comprises at least 16 carbon atoms.

[0052] Examples of “cosmetically acceptable” opacifying and / or pearlescent agents include sodium palmitate, sodium stearate, sodium hydroxystearate, magnesium palmitate, magnesium stearate, magnesium hydroxystearate, ethylene glycol monostearate, ethylene glycol distearate, polyethylene glycol monostearate, polyethylene glycol distearate, and fatty alcohols containing 12 to 22 carbon atoms.

[0053] Examples of “cosmetically acceptable” texturizing agents include N-acylated derivatives of amino acids, for example lauroyl lysine, octenyl starch succinate and myristyl polyglucoside marketed respectively under the names AMINOHOPE™ LL, DRYFLO™ and MONTANOV 14; cellulose fibers, cotton fibers, chitosan fibers, talc, sericite, mica.

[0054] Examples of “cosmetically acceptable” solvents and co-solvents alone or in mixtures include water, glycerol, diglycerol, glycerol oligomers, ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, diethylene glycol, xylitol, erythritol, sorbitol and water-soluble alcohols such as ethanol, isopropanol or butanol.

[0055] Examples of "cosmetically acceptable" deodorant agents include alkali silicates, zinc salts such as zinc sulfate, zinc gluconate, zinc chloride, zinc lactate; quaternary ammonium salts such as cetyltrimethylammonium salts, cetylpyridinium salts; glycerol derivatives such as glycerol caprate, glycerol caprylate, polyglycerol caprate; 1,2-decanediol; 1,3-propanediol; salicylic acid; sodium bicarbonate; cyclodextrins; metal zeolites; Triclosan™; aluminum bromohydrate, aluminum chlorohydrates, aluminum chloride, aluminum sulfate, aluminum zirconium chlorohydrates, aluminum zirconium trichlorohydrate, aluminum zirconium tetrachlorohydrate, aluminum zirconium pentachlorohydrate, aluminum zirconium octochlorohydrate zirconium, aluminum sulfate, sodium aluminum lactate, aluminum glycol chlorohydrate complexes, such as aluminum chlorohydrate propylene glycol complex, aluminum dichlorohydrate propylene glycol complex, aluminum sesquichlorohydrate propylene glycol complex, aluminum chlorohydrate polyethylene glycol complex, aluminum dichlorohydrate polyethylene glycol complex, aluminum sesquichlorohydrate polyethylene glycol complex.

[0056] Examples of “cosmetically acceptable” antioxidant agents include EDTA and its salts, citric acid, tartaric acid, oxalic acid, BHA (butylhydroxyanisol), BHT (butylhydroxytoluene), tocopherol derivatives such as tocopheryl acetate, mixtures of antioxidant compounds such as DISSOLVINE GL 47S (INCI name: Tetrasodium Glutamate Diacetate).

[0057] As examples of active ingredients optionally present in the emulsions (E), (Ei) and (E2) as defined above, there are: - vitamins and their derivatives, in particular their esters, such as retinol (vitamin A) and its esters (e.g. retinyl palmitate), ascorbic acid (vitamin C) and its esters, sugar derivatives of ascorbic acid (such as ascorbyl glucoside), tocopherol (vitamin E) and its esters (such as tocopheryl acetate), vitamins B3 or B10 (niacinamide and its derivatives); - compounds showing a soothing action, notably SEPICALM™ S, allantoin and bisabolol; - compounds showing a moisturizing action such as urea, hydroxyureas, glycerolglucoside, diglycerolglucoside, polyglycerylglucosides, glycerol, diglycerol, xylitylpolyglucoside marketed under the brand name Aquaxyl™; - plant extracts rich in polyphenols such as grape extracts, pine extracts, wine extracts, olive extracts;- N-acylated peptides such as MATRIXIL™; N-acylated amino acids; N-acylated partial protein hydrolysates; amino acids; peptides; total protein hydrolysates; soy extracts, for example Raffermine™; - wheat extracts for example TENSINE™ or GLIADINE™; plant extracts rich in tannins, plant extracts rich in isoflavones or plant extracts rich in terpenes; - extracts of freshwater or marine algae; extracts of marine plants; marine extracts in general such as corals; essential waxes; bacterial extracts; - ceramides; phospholipids; compounds showing antimicrobial action or purifying action, such as LIP ACIDE™ C8G, LIP ACIDE™ UG, SEPICONTROL™ A5; OCTOPIROX™ or SENSIVA™ SC50; - compounds showing an energizing or stimulating property such as PHYSIOGENYL™, panthenol and its derivatives such as SEPICAP™ MP; anti-aging active ingredients such as SEPILIFT™ DPHP, LIPACIDE™ PVB, SEPIVINOL™, SEPIVITAL™, MANOLIVA™, PHYTO-AGE™, TIMECODE™, SURVICODE™; - anti-photo-aging active ingredients; active ingredients that protect the integrity of the dermo-epidermal junction; - active ingredients increasing the synthesis of extracellular matrix components such as collagen, elastins, glycosaminoglycans; - active ingredients that act favorably on chemical cellular communication such as cytokines or physical ones such as integrins; - active ingredients creating a sensation of “heating” on the skin such as activators of skin microcirculation (such as nicotinic acid derivatives) or products creating a sensation of “coolness” on the skin (such as menthol and derivatives); - active ingredients that improve skin microcirculation, for example veinotonics; draining active ingredients; decongestant active ingredients such as extracts of ginko biloba, ivy, horse chestnut, bamboo, ruscus, butcher's broom, centalla asiatica, fucus, rosemary, willow.

[0058] The emulsions (E), (EJ and (E2) which are the subject of the present invention can be prepared by a method known to those skilled in the art which notably comprises the following steps: - a step of preparing said aqueous phase (A) by mixing all of the hydrophilic components in water; - a step of preparing said fatty phase (G) by mixing all of the hydrophilic lipophilic components in the oil or mixture of oils and / or the wax constituting said phase (G) then adding thereto said composition (C) as defined previously; - a step of mixing at the appropriate temperature, said aqueous phase (A) with said fatty phase (G) under mechanical stirring with an anchor-type rotor and at a speed of 60 revolutions / minute to a speed of approximately 100 revolutions / minute until a homogeneous emulsion is obtained; - optionally a step of adjusting the pH of the emulsion.

[0059] The emulsions (E), (Ei) and (E2) can be packaged in pressurized form, for example in an aerosol device, in a “pump bottle” type device or in a device provided with an openwork wall, for example a grid.

[0060] The invention also relates to the use of emulsions (E), (Ei) and (E2) as defined above, to prevent and / or slow down the appearance of unsightly effects on human hair following exposure to intense heat.

[0061] For the purposes of the present invention, the term “unsightly effects on human hair” means any modification of the external appearance due to the consequences of exposure to intense heat, such as the lifting of the cuticles, the appearance of blisters on individual hair fibers, dulling, weakening of the hair in relation to mechanical stresses, the appearance of split ends, the appearance of cracks and breakages in the hair, loss of softness, increased porosity of the fiber and / or reduced hydrophobicity of the hair.

[0062] For the purposes of the present invention, “intense heat” means that induced by the temperature emitted by the appliances used for drying, straightening and / or curling wet hair, a hair dryer, a drying hood, a heated comb, a heated hairbrush, a straightening iron or a curling iron. This temperature is generally between 50°C and 250°C.

[0063] The invention also relates to a method for drying hair, characterized in that it comprises the following successive steps: - at least one step a) of application to the hair of the emulsion (E), (Ei) or (E2) as defined previously, - optionally, a step b) during which, at the end of step a), the hair is left to rest at room temperature for a period of 5 to 60 minutes then - a step c) of drying the hair at the end of step a) or optionally at the end of step b), using a heating device such as a hair dryer or a heating hood.

[0064] The invention also relates to a method for shaping hair, characterized in that it comprises the following successive steps: - a step d) of application to dry or damp hair of the emulsion (E), (Ei) or (E2) as defined previously, - optionally, a step e) during which, at the end of step d), the hair is left to rest at room temperature for a period of 5 to 60 minutes then, - a step f) of shaping the hair at the end of step d) or optionally of step e), using a heating appliance, such as a hair straightener.

[0065] By hair shaping we mean the actions of combing, straightening, waving and / or curling the hair.

[0066] By “room temperature”, in the drying and shaping processes as defined above, is meant a temperature between 15°C and 35°C, in particular 20°C and 30°C.

[0067] In steps a) and d) of the drying and shaping processes as defined above, the emulsions (E), (EJ and (E2) are applied directly or indirectly, for example by means of any type of support intended to be placed in contact with the skin or hair such as paper, wipes or textiles.

[0068] The invention finally relates to the use of composition (C), comprising for 100% of its mass, - from 10% by mass to 90% by mass of at least one poly(farnesene) polymer having a number-average molar mass greater than or equal to 10,000 g / mol and less than or equal to 120,000 g / mol, and in particular having a number-average molar mass greater than or equal to 10,000 g / mol and less than or equal to 90,000 g / mol, said poly(farnesene) polymer being partially or totally hydrogenated and / or functionalized with hydroxyl radicals, and - from 10% by mass to 90% by mass of a mixture (M) of hydrocarbons in which at least 94% by mass of said hydrocarbons contain from fifteen to nineteen carbon atoms, to prevent and / or slow down the appearance of unsightly effects on human hair following exposure to intense heat.

[0069] In the context of the present invention, the poly(famesese) polymer(s) included in composition (C) as defined above, more particularly have a number-average molar mass greater than or equal to 20,000 g / mol and less than or equal to 85,000 g / mol, even more particularly greater than or equal to 30,000 g / mol and less than or equal to 80,000 g / mol.

[0070] According to a particular mode of use as defined above, the poly(famesene) polymer included in the composition (C) as defined above has a number-average molar mass of 71,000 g / mol and it is completely hydrogenated and functionalized with hydroxyl radicals.

[0071] In the context of the present invention, the term "mixture (M) of hydrocarbons" denotes a mixture of branched alkanes, and / or linear alkanes and / or cycloalkanes. The term "linear alkanes" comprising from fifteen to nineteen carbon atoms denotes n-pentadecane, n-hexadecane, n-heptadecane, n- octadecane and n-nonadecane; by “branched alkanes” (or iso-alkanes) containing from fifteen to nineteen carbon atoms, we denote more particularly 2-methyl tetradecane (or isopentadecane), 2-methyl pentadecane (or isohexadecane), 2-methyl hexadecane (or isoheptadecane), 2-methyl heptadecane (or isooctadecane) and 2-methyl octadecane (or isononadecane); by “cyclo-alkanes containing from fifteen to nineteen carbon atoms” we denote more particularly saturated hydrocarbons comprising at least one saturated cyclic hydrocarbon group optionally substituted by one or more linear or branched alkyl radicals.

[0072] According to a particular mode of use as defined above, the mixture (M) included in the composition (C) as defined above, comprises for 100% of its mass, a mass proportion of branched alkanes greater than or equal to 80% and less than or equal to 100%, and more particularly greater than or equal to 90% and less than or equal to 100%; a mass proportion of linear alkanes greater than or equal to 0% and less than or equal to 15%, and more particularly greater than or equal to 0% and less than or equal to 10%; and a mass proportion of cycloalkanes greater than or equal to 0% and less than or equal to 5%, preferably less than or equal to 1%.

[0073] According to a particular aspect of the use as defined above, said mixture (M) of hydrocarbons included in said composition (C) is chosen from the following hydrocarbon mixtures: - a mixture of saturated hydrocarbons comprising, for 100% of its mass, 1.1% of linear alkanes containing from fourteen to nineteen carbon atoms and 98.9% of iso-alkanes containing from fourteen to nineteen carbon atoms, - a mixture of saturated hydrocarbons comprising, for 100% of its mass, 3.8% of linear alkanes containing from fifteen to nineteen carbon atoms, 96.2% of iso-alkanes containing from fifteen to nineteen carbon atoms, and less than 0.1% of cycloalkanes containing from fifteen to nineteen carbon atoms, and - a mixture of saturated hydrocarbons, comprising for 100% of its mass 15% to 20% by mass of alkanes (linear, isoalkanes and cycloalkanes) containing 17 carbon atoms, 70% to 75% by mass of alkanes (linear, isoalkanes and cycloalkanes) containing 18 carbon atoms, 4% to 6% by mass of alkanes (linear, isoalkanes and cycloalkanes) containing 19 carbon atoms.

[0074] Examples

[0075] Preparation of the composition (C) used in the examples - The (poly)farnesene polymer included in composition (C) used in the following examples is fully hydrogenated and functionalized with hydroxyl radicals; it has a number-average molar mass of 71,000 g / mol. It was prepared according to the procedure described in the international patent application published under number WO2018 / 052709. - The mixture (M) included in this same composition (C) is commercially available under the brand name Emogreen™ L19; it comprises for 100% of its mass 3.8% of linear alkanes containing from fifteen to nineteen carbon atoms, 96.2% of iso-alkanes containing from fifteen to nineteen carbon atoms, and a mass proportion of less than 0.1% of cyclo-alkanes containing from fifteen to nineteen carbon atoms; among these constituents for 100% of its mass, 17.1% by mass are alkanes (linear, isoalkanes and cycloalkanes) containing 17 carbon atoms, 72.5% by mass are alkanes (linear, isoalkanes and cycloalkanes) containing 18 carbon atoms, and 4.7% by mass are alkanes (linear, isoalkanes and cycloalkanes) containing 19 carbon atoms. The mixture (M) was prepared according to the procedure described in the international patent application published under number WO 2020 / 144440 AL - The desired quantity of Emogreen™L19 is poured into a glass reactor equipped with a double jacket in which a thermostatically controlled fluid circulates and a mechanical stirrer equipped with a stirrer equipped with an anchor-type blade. The stirring speed is set at 50 rpm and the temperature at 25°C. The desired quantity of poly(famesene) polymer is then introduced with moderate stirring at 60°C. The quantities introduced are such that Emogreen™L19 represents a mass content of 60% and the poly(famesene) polymer represents a mass content of 40% for 100% by mass of the composition (C) thus obtained.

[0076] Demonstration of the compatibility of composition (C) in formulations intended to be used by application to the hair.

[0077] A. Compatibility of composition (C) in hair conditioning formulations comprising a cationic conditioning agent. - Preparation of formulations: The formulations according to the invention (Fi) and (F2) and the comparative formulations (F\) and (F'2) are prepared, the compositions of which are recorded in Table 1 below, the proportions being expressed in mass percentages. - Evaluation of the formulations: A quantity of 100 cm3 of the composition to be tested is introduced into a climatic chamber regulated at 20°C and contained in a 250 cm3 bottle, for a period of 3 months. The visual appearance of the tested composition is evaluated after a period of 7 days and after a period of 3 months. The same operation is repeated with new samples of the formulations by regulating the internal temperature of the climatic chamber to 45°C. The visual appearance of the tested composition is evaluated after a period of 3 months. The results obtained are recorded in the following table 2. [Tables 1] Constituents (Fi) (F2) (F'i) (F'2) Water qsp 100% qsp 100% qsp 100% qsp 100% Dissolvine™ GL47S (tetrasodium glutamate diacetate; chelating agent) 0.30% 0.30% 0.30% 0.30% Glycerin 3.00% 3.00% 3.00% 3.00% C16C18 FA (mixture of cetyl and stearyl alcohols 50 / 50 mass ratio) 4.00% 4.00% 4.00% 4.00% Varisoft™ BT85 (Behentrimonium Chloride; antistatic conditioner) 3.00% 3.00% 3.00% 3.00% DL alpha tocopherol 0.05% 0.05% 0.05% 0.05% Coconut oil 2.00% 2.00% 2.00% 2.00% Lanol™ 2681 (Coco caprylate capra te) 3.00% 3.00% 3.00% 3.00% Natrosol™250HPC (hydroxyethylcell ulose) 0.80% 0.80% 0.80% 0.80% Composition (C) 3.00% 5.00% 0% 0% Massocare™ SIL CPD (Cyclopentas iloxane (and) PEG / PPG-18 / 18 Dim ethicone) 0% 0% 3.00% 5.00% Euxyl™ PE9010 (Phenoxyethanol and Ethylhexylglycerin) 1.00% 1.00% 1.00% 1.00% Citric acid qs pH 4.5 qs pH 4.5 qs pH 4.5 qs pH 4.5 [Tables 2] (Fi) (F2) (F'i) (F'2) Appearance after 7 days at 20°C Homogeneous Homogeneous Homogeneous Homogeneous Appearance after 3 months at 20°C Homogeneous Homogeneous Homogeneous Homogeneous After 3 months at 45°C Homogeneous Homogeneous Exudation Exudation Viscosity at 20°C (BKF RVT M4V6): after 7 days at 20°C 62,000 mPa.s 76,000 mPas 66,000 mPa.s 78,000 mPa.s after 3 months at 20°C 68,000 mPa.s 77,000 mPa.s 70,000 mPa.s 68,000 mPa.s

[0078] B. Compatibility of a composition (C) in oil-in-water hair conditioning emulsions comprising a crosslinked cationic polyelectrolyte. - Preparation of formulations: Formulations (F3) and (F4) according to the invention and comparative formulations (F'3) and (F'4) are prepared, the compositions of which are recorded in Table 3 below, the proportions being expressed in mass percentages. - Evaluation of formulations: Formulations (F3), (F4), (F'3) and (F'4) are evaluated according to the same protocol as that described in the "Evaluation of formulations" section of paragraph A above. The results obtained are recorded in the following table 4. [Tables 3] Constituents (F3) (F4) (F'3) (F'4) Water qsp 10 0% qsp 10 0% qsp 10 0% qsp 10 0% SOLAGUM™ Tara (Caesalpinia Spinosa Gum); thickening and stabilizing agent 0.3% 0.3% 0.3% 0.3% Glycerin 2.0% 2.0% 2.0% 2.0% Argan Oil 2.0% 2.0% 2.0% 2.0% DL alpha tocopherol 0.5% 0.5% 0.5% 0.5% Shnulquat™ HC305 (Acrylamidopropyltrimonium Chloride / Acrylates Copolymer (and) Isohexadecane (and) Coceth-7); cationic polymer thickener) 3.0% 3.0% 3.0% 3.0% Composition (C) 3.00% 5.00% 0% 0% Massocare™ SIL CPD 0% 0% 3.00% 5.00% Euxyl PE9010 (preservative) 1.00% 1.00% 1.00% 1.00% Citric acid qs pH 4.5 qs pH 4.5 qs pH 4.5 qs pH 4.5 [Tables 4] (F3) (F4) (F'3) (F'4) Appearance after 7 days at 20°C Homogeneous Homogeneous Homogeneous Homogeneous Appearance after 3 months at 20°C Homogeneous Homogeneous Homogeneous Homogeneous After 3 months at 45°C Homogeneous Homogeneous Homogeneous Exudation Viscosity at 20°C (BKF RVT M4V6): after 7 days at 20°C 167,000 mPa.s 105,000 mPa.s 180,000 mPa.s 104,000 mPa.s after 3 months at 20°C 157,000 mPa.s 95,000 mPa.s 157,000 mPa.s 75,000 mPa.s

[0079] C. Compatibility of a composition (C) in leave-in oil-in-water type hair conditioning emulsions comprising at least one surfactant, and intended to be applied to the hair. Preparation of formulations: Formulations (F5) and (F6) according to the invention and comparative formulations (F'5) and (F'6) are prepared, the compositions of which are recorded in Table 5 below, the proportions being expressed in mass percentages. Evaluation of formulations: Formulations (F5), (F6), (F'5) and (F'6) are evaluated according to the same protocol as previously. The results are recorded in Table 6 below. [Tables 5] Constituents (F5) (F6) (F'5) (F'6) Water qsp 100% qsp 100% qsp 100% qsp 100% Dissolvine GL47S 0.3% 0.3% 0.3% 0.3% Sepimax™ Zen (Polyacrylate Cross polymer-6) (crosslinked anionic polyelectrolyte; thickening agent) 0.6% 0.6% 0.6% 0.6% Fluidifeel™ Easy (Lauryl Glucoside (and) Myristyl Glucoside (and) Polyg lyceryl-6 Laurate) (O / W type emulsifying surfactant) 3.0% 3.0% 3.0% 3.0% Argan Oil 3.0% 2.0% 3.0% 2.0% DL alpha tocopherol 0.05% 0.05% 0.05% 0.05% Composition (C) 2.00% 3.00% 0% 0% Massocare™ SIL CPD 0% 0% 2.00% 3.00% Euxyl™ PE9010 1.00% 1.00% 1.00% 1.00% Citric acid qs pH 4.5 qs pH 4.5 qs pH 4.5 qs pH 4.5 [Tableauxô] (F5) (F6) (F'5) (F'6) Appearance after 7 days at 20°C Homogeneous, smooth liquid Homogeneous, smooth liquid Heterogeneous, smooth liquid with globules Heterogeneous, smooth liquid with globules Appearance after 3 months at 20°C Homogeneous, smooth liquid Homogeneous, smooth liquid Heterogeneous, smooth liquid with globules Heterogeneous, smooth liquid with globules After 3 months at 45°C Homogeneous, smooth liquid Homogeneous, smooth liquid Heterogeneous, smooth liquid with globules Heterogeneous, smooth liquid with globules Viscosity at 20°C (BKF RVT M2V6): after 7 days at 20°C 2,440 mPa.s 2,620 mPas 1,540 mPa.s 2,480 mPa.s after 3 months at 20°C 2,420 mPa.s 2,155 mPa.s 1,720 mPa.s 2,200 mPa.s

[0080] D. Compatibility of a composition (C) in oils intended to be applied to the hair - Preparation of formulations: The formulation according to the invention (F7) and the comparative formulations (F'7) and (F'8) are prepared, the compositions of which are recorded in Table 7 below, the proportions being expressed in mass percentages. - Evaluation of formulations: Formulations (F7), (F'7), (F'8) are evaluated according to the same protocol as previously. The results are recorded in the following table 8. [Paintings?] Constituents (F7) (F'8) (F'7) Composition (C) 50% / / Emogreen L19 / / 50% Massocare SIL CPD 50% Argan oil 2.5% 2.5% 2.5% Coconut oil 2.5% 2.5% 2.5% Triglycerides 5545 44.8% 44.8% 44.8% DL alpha tocopherol 0.2% 0.2% 0.2% [Tables 8] Evaluation (F7) (F'8) (F'7) Viscosity BKF LVT speed 2 (mPa.s) 120 mPa.s not measurable <50 mPa.s Appearance 7 days at 20°C Homogeneous heterogeneous, immiscible Homogeneous Appearance 3 months at 20°C Homogeneous heterogeneous, immiscible Homogeneous Appearance 3 months at 45°C Homogeneous heterogeneous, immiscible Homogeneous

[0081] E. Observations and conclusions The results obtained in the preceding paragraphs allow us to conclude the following: - The formulations (Fi) and (F2) according to the invention comprising a conditioning agent and the composition (C) have a homogeneous appearance after storage for a period of 3 months at 45°C, which is not observed for the formulations (F'i) and (F'2) comprising the silicone derivatives. - The W / O type emulsion (formulation (F4)) according to the invention comprising a crosslinked cationic polyelectrolyte, and 5% of the composition (C) has a homogeneous appearance after storage for a period of 3 months at 45°C, whereas the formulation (F'4) comprising silicone derivatives exudes. - The non-rinse H / W type emulsions for conditioning hair comprising at least one surfactant, and composition (C) have a more homogeneous appearance than the comparative emulsions (formulations (F'5 and F'6)) which comprise globules. - Formulation (F7) comprising composition (C) has a homogeneous appearance after storage for 3 months at 45°C, which is not observed with formulation (F'8) which has a heterogeneous appearance. - We can therefore conclude from all these results, a very good compatibility of the formulations comprising composition (C) with formulation schemes intended for applications in hair care and / or hygiene.

[0082] Demonstration of the preservation of the integrity of the keratin of the hair cortex of a formulation comprising composition (C). The evaluation of the effect of the said composition (C) to preserve the integrity of the keratin of the hair cortex is carried out by the Xpolar® technology developed by the company Kmax Innovative System. A. Principle of the evaluation method: Xpolar® technology is an imaging mode integrated on a microscopy platform, allowing to observe and measure the polarimetric modifications produced by the samples studied. It provides information on the birefringence of the sample evaluated. By “birefringence” we mean the physical property of a material in which light propagates anisotropically. In a birefringent medium, the refractive index is not unique, it depends on the direction of polarization of the light background. The “k-index” parameter, measured by Xpolar® technology, provides information on the birefringence of the sample at each point of the image, it can be used quantitatively to characterize the sample. Hair is composed of keratins, a family of fibrous proteins. Keratin fibers have a crystalline part linked by Coulomb forces and hydrophobic interactions.This crystalline structure of the keratin fibers of the cortex gives the hair the ability to modify the polarization of the light passing through it, through a property called birefringence. A healthy hair (control), namely a hair that has not been exposed to intense heat, has a high k-index value. The coloration inside the fiber is homogeneous and is composed of the colors located at the maximum level of the measurement (orange-red coloration dominates). When the keratin fibers inside the hair are not altered, particularly by exposure to intense heat, they are organized in a crystalline network, and this results in a "high k-index" value.Conversely, exposure of the hair to thermal stress, such as exposure to intense heat, modifies the internal structure of the keratin, leading to disorganization and a modification of the optical properties of the keratin, ultimately resulting in a reduction of the "k-index" and a strong reduction in the coloration inside the fiber which becomes heterogeneous and with different shades (green, blue, purple). B. Procedure of the evaluation method: The composition to be tested is applied to dry hair with a comb comprising approximately 30 mg of said composition to be tested. The hair is then massaged for 30 seconds, then dried at room temperature (20°C) for 30 minutes. The heat treatment is then carried out with a straightening iron at a temperature of 210°C for 50 passes. The hair thus treated is left at room temperature for 30 minutes. The observation slides are prepared by - coating hair in a freezing medium then - by freezing (-20°C) coated hair then - by making a 30 pm cut then mounting the blades on the device observation (XPolar device, Magnification: x20 and acquisition of 25 images per condition). C. Compositions Evaluated: Three compositions and four formulas identified respectively in Tables 9 and 10 were evaluated. [Tables 9] References LCE21076 LCE21077 LCE21078 Ingredient Composition (C) Massocare™ SIL D MD Emogreen™ L19 Appearance Colorless liquid [Tables 10] References LCE21071 LCE21072 LCE210 73 LCE21075 Demineralized water qs 100% qs 100% qs 100% qs 100% Dissolvine™ GL47S 0.3% 0.3% 0.3% 0.3% Sepimax™ Zen 0.6% 0.6% 0.6% 0.6% Fluidifeel™ Easy 3% 3% 3% 3% Argan oil 2% 2% 2% 2% DL alpha tocopherol 0.05% 0.05% 0.05% 0.05% Composition (Cl) 3% 0% 0% 0% Massocare™ SIL DMD 0% 3% 0% 0% Emogreen™ L19 0% 0% 0% 3% Euxyl™ PE9010 1% Lactic acid qs pH = 4.5 - 5.0 In addition, the same evaluation was carried out with untreated hair that had not undergone heat treatment ('negative control'), and with untreated hair that had undergone the heat treatment described in the procedure above ('positive control'). D. Results obtained: The “k-index” values ​​obtained are recorded in Table 11 below. The results are expressed by two values: - The variation compared to the negative control VAi calculated as follows: VAi [(k-indeXi - k-index negative control) 100 / k-indeX negative control - The percentage of VA2 protection calculated as follows: VA2 = 100 - [(k-indeXi - k-index negative control) X 100 / (k-indeX negative control ” k-indeX positive control)] [Tableauxll] Tested composition k-index (x 10 4) VA! va2 Negative Control 87.82 + 16.13 Positive Control 58.42 + 9.70 -33% LCE 21076 69.65 + 9.70 -21% 38.2% LCE 21077 68.16 + 13.45 -22% 33.1% LCE 21078 51.83 + 6.56 -41% - 22.4% LCE 21071 60.64+ 11.65 -31% 22.0% LCE 21072 67.24 + 11.81 -23% 40.9% LCE 21073 52.96 + 8.11 -40% na LCE 21075 62.35 + 8.88 -29% 26.9% A further statistical analysis was carried out between the different compositions and showed the significant differences expressed in Table 12 below: [Tables 12] Conditions studied Significant difference (p) LCE 21073 / LCE 21071 Yes (p=9 103) LCE 21073 / LCE 21072 Yes (p=3.5 105) LCE 21073 / LCE 21075 Yes (p=2.8 10 4) LCE 21071 / LCE 21072 No (p=8 102) LCE 21076 / LCE 21077 No (p=0.72) LCE 21076 / LCE 21078 Yes (p=1.14 105) Observations and comments: Composition (C) (LCE21076) and composition (LCE21077) based on silicone derivatives, show a percentage of protection against thermal exposure of the straightening iron of 38.2% and 33.1% respectively; composition (LCE21078) based on the Emogreen™L19 hydrocarbon mixture shows a negative percentage of protection, thus demonstrating its ineffectiveness and a visual observation during the experiment highlighted a strong degraded state of the keratin. Among the formulations tested, for the formulation (LCE21073) called “placebo” because it does not include composition (C) nor silicone derivatives nor other film-forming or keratin-protecting agents, an alteration of the keratin caused by the heat treatment is observed. The results of the protection percentages show that the 3 formulations (LCE21071) (LCE21072) (LCE21075) provide protection on keratin which is significantly different from that provided by the placebo formula (LCE21073). Composition (C) shows a protective action on the keratin of the hair cortex by reducing the effect of heat on the integrity of the keratin by 38%. This property is verified in formulation versus placebo where the keratin protection rate is 22%. The formulations according to the invention comprising composition (C) are therefore alternative solutions to silicone derivatives, for example polydimethylsiloxane or PDMS or dimethicone), and / or dimethiconols, to give cosmetic formulations properties making it possible to slow down or prevent the appearance of unsightly effects on human hair following exposure to intense heat. This alternative uses chemical compositions of plant origin and / or biodegradable.

[0083] Examples of cosmetic formulations

[0084] [Table 13]: Water-in-oil emulsion for hair care before drying Composition Percentage by mass Water qsp 100% glycerin 2% Simulquat HC 305 (40% active matter) 2.5% (i.e. 1% active matter) TEA 6% Up to pH = 4.0 - 4.5 Easynov 2.5% Composition (C) 10% Euxyl PE 9010 1% [Table 14]: Oil-in-water emulsion hair balm Composition Percentages Demineralized water qsp Dissolvine GL47S 0.3% Sepimax Zen 0.6% Solagum AX 0.5% Fluidifeel Easy 0.3% Argan oil 2% DL alpha tocopherol 0.05% Composition (C) 3% Euxyl PE9010 1% Lactic acid Up to pH=4.5

Claims

Claims

1. Emulsion (E2) of an aqueous phase (A) and a fatty phase (G) characterized in that it comprises, for 100% of its mass: - From 60% to 98% by mass of said aqueous phase (A), and - From 2% to 40% by mass of said fatty phase (G), in that said fatty phase (G) comprises, for 100% of its mass: • From 10% to 80% by mass and preferably from 10% to 70% by mass, of a composition (C) comprising for 100% of its mass, • from 10% by mass to 90% by mass of at least one poly(farnesene) polymer having a number-average molar mass greater than or equal to 10,000 g / mol and less than or equal to 120,000 g / mol, said poly(farnesene) polymer being partially or totally hydrogenated and / or functionalized with hydroxyl radicals, and • from 10% by mass to 90% by mass of a mixture (M) of hydrocarbons in which at least 94% by mass of said hydrocarbons contain from fifteen to nineteen carbon atoms, • From 0.5% to 20% by mass and preferably from 1% to 15% by mass of an emulsifying surfactant (S2) of the water-in-oil type or of a mixture of emulsifying surfactants (MS2), said mixture being of the water-in-oil type, and • From 0% to 89.5% by mass and preferably from 15% to 89% by mass, of an oil or several oils and / or a wax, said wax being different from said composition (C).

2. Emulsion (E2) according to claim 1, characterized in that it comprises, for 100% of its mass: - From 60% to 95% by mass, preferably from 60% to 90% by mass and in particular from 60% to 85% by mass, of said aqueous phase (A), and - From 5% to 40% by mass, preferably from 10% to 40% by mass and in particular from 15% to 40% by mass of said fatty phase (G2).

3. Emulsion (E2) according to one of claims 1 or 2, in which said poly(farnesene) polymer has a number average molar mass greater than or equal to 20,000 g / mol and less than or equal to 90,000 g / mol, and in particular having a number average molar mass greater than or equal to 40,000 g / mol and less than or equal to 80,000 g / mol.

4. Emulsion (E2) according to one of claims 1 to 3, wherein said mixture (M) of hydrocarbons included in said emulsion (E2) is chosen from the following hydrocarbon mixtures: - a mixture of saturated hydrocarbons comprising, for 100% of its mass, 3.8% of linear alkanes comprising from fifteen to nineteen carbon atoms, 96.2% of iso-alkanes comprising from fifteen to nineteen carbon atoms, and less than 0.1% of cycloalkanes comprising from fifteen to nineteen carbon atoms, and - a mixture of saturated hydrocarbons, comprising for 100% of its mass 15% to 20% by mass of alkanes (linear, iso-alkanes and cyclo-alkanes) comprising 17 carbon atoms, 70% to 75% by mass of alkanes (linear, iso-alkanes and cyclo-alkanes) containing 18 carbon atoms, 4% to 6% by mass of alkanes (linear, iso-alkanes and cyclo-alkanes) containing 19 carbon atoms.

5. Emulsion (E2) according to any one of claims 1 to 4, wherein said aqueous phase (A) of said emulsion (E2) comprises for 100% of its mass, from 0.5% by mass to 10% by mass and preferably from 0.5% by mass to 5% by mass of a crosslinked anionic polyelectrolyte (P) or of a mixture of crosslinked anionic polyelectrolytes (MP).

6. Emulsion (E2) according to claim 5, wherein the crosslinked anionic polyelectrolyte (P) or polyelectrolytes crosslinked anionic polyelectrolytes constituting the mixtures (MP) included in said emulsion (E2), are chosen from the following anionic polyelectrolytes: a homopolymer of 2-methyl 2-[(l-oxo 2-propenyl) amino] 1-propanesulfonic acid partially or completely salified in the form of sodium salt or ammonium salt, crosslinked by triallylamine and / or methylene-bis(acrylamide); a copolymer of 2-methyl 2-[(l-oxo 2-propenyl) amino] 1-propanesulfonic acid (y), partially or totally salified in the form of sodium salt or ammonium salt and acrylic acid (6) partially or totally salified in the form of sodium salt or ammonium salt, crosslinked by triallylamine and / or methylene-bis(acrylamide); in particular said copolymer in which the molar proportions of monomers (y), and (6) are as follows: • 30% < (y) < 90% or more particularly 40% < (y) < 90% and • 10% < (ô) < 70% or more particularly 10% < (ô) < 60%, a copolymer of 2-methyl 2-[(l-oxo 2-propenyl) amino] 1-propanesulfonic acid (y) partially or completely salified in the form of sodium salt or ammonium salt and acrylamide (e), crosslinked by triallylamine and / or methylene-bis(acrylamide); in particular said copolymer in which the molar proportions of monomers (y), and (Ç) are as follows: • 30% < (y) < 90%, and • 10% < (e) < 70%, a copolymer of 2-methyl 2-[(l-oxo 2-propenyl) amino] 1-propanesulfonic acid (y) partially or totally salified in the form of sodium salt, and hydroxyethylacrylate (Ç), crosslinked by triallylamine and / or methylene-bis(acrylamide); in particular said copolymer in which the molar proportions of monomers (y), and (Ç) are as follows: • 30% < (y) < 90%, and • 10% < (Ç) < 70%, a terpolymer of 2-methyl 2-[(l-oxo 2-propenyl) amino] 1-propanesulfonic acid (y) partially or totally salified in the form of sodium salt or ammonium salt, acrylic acid (6) partially or totally salified in the form of sodium salt or ammonium salt and acrylamide (e), crosslinked by triallylamine and / or methylenebis(acrylamide); in particular said terpolymer in which the molar proportions of monomers (y), (6) and (e) are as follows: • 30% < (y) < 45%, • 2% < (ô) < 10%, and more particularly 2% < (ô) < 8% • 45% < (e) < 68%, and more particularly 47% < (ô) < 68%; a terpolymer of 2-methyl 2-[(l-oxo 2-propenyl)amino] 1-propanesulfonic acid (y) partially or completely salified in the form of sodium salt or ammonium salt of N,N dimethylacrylamide (|3) and tetraethoxylated lauryl methacrylate (a), crosslinked with trimethylolpropanetriacrylate and / or triallylamine and / or methylene-bis(acrylamide); in particular said terpolymer in which the molar proportions of monomers (y), (|3) and (a) are as follows: • 60% < (y) < 80%, • 15% < (|3) < 39.5%, • 0.5% < (a) < 5%; a tetrapolymer of 2-methyl 2-[(l-oxo 2-propenyl) amino] 1-propanesulfonic acid (y) partially or totally salified in the form of sodium salt or ammonium salt, N,N dimethylacrylamide (|3), lauroyl methacrylate (q) and stearoyl methacrylate (p), crosslinked by trimethylolpropanetriacrylate and / or triallylamine and / or methylene-bis(acrylamide); in particular said tetrapolymer in which the molar proportions of monomers (y), (|3), (q) and (p) are as follows:

7. • 0.5% < (il) < 2.5%, and • 0.5% < (p) < 2.5%. Emulsion (E2) according to any one of claims 1 to 6, characterized in that it further comprises one or more auxiliary compounds chosen from foaming and / or detergent surfactants, thickening and / or gelling surfactants, thickening and / or gelling agents, stabilizing agents, film-forming compounds, solvents and cosolvents, hydrotropic agents, plasticizing agents, emulsifying and co-emulsifying agents, opacifying agents, pearlescent agents, superfatting agents, sequestering agents, chelating agents, antioxidant agents, perfumes, essential oils, preservatives, conditioning agents, deodorant agents, whitening agents intended for bleaching hair and skin, active ingredients intended to provide a treating and / or protective action with respect to the skin or hair, sun filters, mineral fillers or pigments,particles providing a visual effect or intended for the encapsulation of active ingredients, exfoliating particles, texturizing agents, optical brighteners or insect repellents.,