Inverse latex for cosmetic composition comprising specific chelating agent and polyelectrolyte combining strong acid function and neutral function

Abstract

To provide a novel inverse latex using a novel metal ion sequestering agent.SOLUTION: There is provided a self-invertible inverse latex having an aqueous phase, comprising: a) a cross-linked anionic polyelectrolyte consisting of: at least one first monomer unit derived from 2-methyl-2-[(1-oxo-2-propenyl)amino]1-propane sulfonic acid in the form of a free or partially or totally salified acid; and at least one second monomer unit derived from at least one monomer selected from the group consisting of (2-hydroxyethyl)acrylate, (2,3-dihydroxypropyl)acrylate, (2-hydroxyethyl)methacrylate and the like; and at least one monomer unit derived from a cross-linking polyethylenic monomer; b) at least one chelating compound selected from the group consisting of ethylenediamine disuccinic acid in the form of trisodium salt, tetrasodium salt of glutamic acid, N,N diacetic, or the sodium salt of imminosuccinic acid.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a self-invertible inverse latex comprising a novel sequestrant, to a method for preparing such a self-invertible inverse latex, to the use of said self-invertible inverse latex as a thickener and / or emulsifier and / or stabilizer used to prepare topical cosmetic or pharmaceutical compositions, and also to said compositions so prepared. [Background technology]

[0002] Polymers are widely used today in topical cosmetic formulations and represent the second most widely used group of products in this type of formulation. Cosmetic compositions contain polar phases, such as a phase consisting of water, and in most cases require the use of rheology-modifying polymers to increase the viscosity of these polar phases and also to provide them with well-defined rheological behavior.

[0003] Among the polymers that modify the rheology of the polar phase, mention may be made of natural or synthetic polymers, in particular linear or branched, crosslinked or not, anionic, cationic, or amphoteric, polyelectrolyte-type polymers. Once introduced into the polar phase, these polymers exhibit the property of spreading under the influence of electrostatic repulsion due to the presence of (negative and / or positive) charges on the linear or branched, not crosslinked or not crosslinked polymer backbone. Rheology modifiers both increase the viscosity of the polar phase and also impart a certain consistency and / or stabilizing effect to the thickened cosmetic, dermocosmetic, or dermopharmaceutical formulation.

[0004] To meet consumer needs and improve topical cosmetic formulations, scientists have developed new, innovative and diverse polymer systems. Thus, polymers used in topical or dermocosmetics can act as film formers, rheology modifiers, enable the stabilization of the fatty phase in emulsions (water-in-oil or oil-in-water) or the stabilization of particles (pigments or fillers), or impart certain sensory properties after application to the skin (such as, for example, softness to the touch, ease of handling and application, freshness effect, etc.), and can directly influence the appearance (translucent or opaque) of the formula.

[0005] Polymers, mainly polyelectrolytes, that modify the rheology of the aqueous phase result from the radical polymerization of (meth)acrylate type monomers, ie esters derived from acrylic or methacrylic acid, or derivatives of acrylamide.

[0006] These polymers, which can now be offered in the form of inverse latex, inverse latex concentrate or powder, make it possible to meet the needs of customers in terms of thickening performance in polar solvents, such as water. Once these polymers are dispersed in water, the aqueous gels obtained exhibit specific sensory properties to the touch, a smooth appearance without particles or lumps, and also ease of handling and application.

[0007] The liquid form, or its concentrated liquid form, known by the name "self-reversible reverse latex", is a composition provided in the form of a water-in-oil emulsion, an aqueous phase comprising at least one polymer of polyelectrolyte type, of anionic, cationic or amphoteric type, which may be linear and / or branched and / or crosslinked, a fatty phase comprising at least one oil, at least one emulsifying surfactant of the water-in-oil type (S1), - at least one emulsifying surfactant of the oil-in-water type (S2); Including, The polymer is obtained using an inverse emulsion radical polymerization process.

[0008] Radical polymerization is known for its sensitivity to the presence of impurities, even in small amounts. Compounds that can cause a slowdown in the rate of polymerization at low concentrations are known as inhibitors or retarders. However, distinguishing between these two effects is not always simple; the same compound can have both detrimental effects depending on its concentration in the medium or the nature of the monomer and the reaction medium. The reproducible performance of aqueous phase-thickening polymers must be guaranteed to ensure the consistent quality of cosmetic formulations containing these polymers. To this end, industrial manufacturers must ensure that polymerization reactions repeatedly follow the same reaction kinetics, more specifically, in terms of inhibition time, reaction exotherm (°C / min), and overall duration of the polymerization reaction over time. Given these constraints, factors that can affect the initiation of radical polymerization reactions, such as the presence of oxygen, which can slow the polymerization reaction by reacting with generated radicals, are of particular interest. These new peroxide radicals exhibit lower reactivity and reduced initiation ability. This results in a weaker initiation stage and a slower propagation reaction rate, ultimately resulting in polymers with different thickening properties. In particular, a step of deoxygenating the medium by purging with nitrogen prior to starting the polymerization reaction proves to be necessary.

[0009] Another factor that directly influences polymerization is the presence of metal entities (Fe 2+ , Fe 3+ , Cu 2+ In this case, inhibition can occur during the initiation stage by reaction of the initiator radical with a metal impurity, so that the active radical center is then unable to anchor another monomer unit and becomes inactive during polymerization.

[0010] The metal ions mentioned above can potentially come from the starting materials or from items of equipment.

[0011] Monomers used for the preparation of self-reversible reverse latexes may exhibit trace amounts of metal cations. Similarly, it is not impossible to predict the presence of metal contaminants in items of industrial equipment undergoing polymerization reactions. In most cases, the items of equipment are made of stainless steel, and several types of stainless steel are encountered, differing in their composition. Stainless steel is an iron-based alloy to which nickel, chromium, or molybdenum is sometimes added. It is chromium that gives stainless steel its antioxidant properties, since in the presence of oxygen, chromium can regenerate its surface chromium oxide layer, referred to as the passive layer.

[0012] However, it is not impossible that upon prolonged contact with pollutants, acids, moisture, sea spray or iron-bearing dust, or in the case of deep scratches, the protective layer will then become depassivated (and therefore activated) and become oxidized more quickly than the stainless steel can protect itself. In these cases, the appearance of rust can therefore be understood as indicating which rust is the source of iron-based metal pollutants.

[0013] Given the risks associated with the presence of all these sources of metal contaminants, the use of a sequestering agent is essential. A commonly used product is the pentasodium salt of diethylenetriaminepentaacetic acid (Versenex TM (also known by the brand name 80).

[0014] However, changes in European regulations regarding the classification of the pentasodium salt of diethylenetriaminepentaacetic acid as a sequestrant for the preparation of self-reversible reverse latexes led us to look for alternative solutions. Summary of the Invention [Problem to be solved by the invention]

[0015] Starting from there, the problem that arises is to provide new inverse latexes using new sequestering agents that are as efficient as the pentasodium salt of diethylenetriaminepentaacetic acid, but that exhibit properties that are more in line with the changing regulations. [Means for solving the problem]

[0016] The solution of the present invention is a) at least one first monomer unit resulting from 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid in free acid or partially or completely salified form; - at least one second monomer unit resulting from at least one monomer selected from the group consisting of 2-hydroxyethyl acrylate, 2,3-dihydroxypropyl acrylate, 2-hydroxyethyl methacrylate, 2,3-dihydroxypropyl methacrylate, and vinylpyrrolidone; and - at least one monomer unit derived from a polyethylene cross-linking monomer (AR) a cross-linked anionic polyelectrolyte (P) consisting of: b) at least one sequestering compound (SQ) selected from the group consisting of ethylenediaminedisuccinic acid in the form of its trisodium salt, glutamic acid, the tetrasodium salt of N,N-diacetic acid, and the sodium salt of iminosuccinic acid; and a self-reversible inverse latex comprising an aqueous phase comprising:

[0017] Optionally, the self-reversible inverse latex according to the present invention has the following characteristics: - Sequestering agent (SQ) is ethylenediaminedisuccinic acid in trisodium salt form; - the aqueous phase comprises at least 0.01 mol % of a sequestering agent (SQ), more particularly at least 0.01 mol % of ethylenediaminedisuccinic acid in the form of its trisodium salt; the polyethylene crosslinking monomer (AR) is chosen from methylenebis(acrylamide), ethylene glycol dimethacrylate, diethylene glycol diacrylate, ethylene glycol diacrylate, diallyl urea, triallylamine, trimethylolpropane triacrylate, diallyloxyacetic acid or a salt thereof, such as sodium diallyloxyacetate, or a mixture of these compounds; - the crosslinking monomer (AR) is methylenebis(acrylamide) or triallylamine; - crosslinked anionic polyelectrolytes, per 100 mol %, from 10% to 95% by weight, more particularly from 20% to 90% by weight, even more particularly from 32% to 80% by weight of monomer units resulting from 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid in free acid or partially or completely salified form; from 5% to 90% by weight, more particularly from 10% to 80% by weight, and even more particularly from 20% to 68% by weight of monomer units resulting from at least one monomer selected from the group consisting of 2-hydroxyethyl acrylate, 2,3-dihydroxypropyl acrylate, 2-hydroxyethyl methacrylate, 2,3-dihydroxypropyl methacrylate and vinylpyrrolidone, and comprising monomer units resulting from at least one polyethylene crosslinking monomer (AR) in a molar proportion of more than 0 mol % and less than or equal to 1 mol %, more particularly less than or equal to 0.5 mol %, more particularly less than or equal to 0.25 mol %, very particularly less than or equal to 0.1 mol %, and more particularly greater than or equal to 0.005 mol % One or more of the following may be indicated: DETAILED DESCRIPTION OF THE INVENTION

[0018] Within the meaning of the present invention, crosslinked anionic polyelectrolytes (P) refer to non-linear polyelectrolytes, in relation to the polymer (P), which are insoluble in water but are capable of swelling in water, and which are provided in the form of a three-dimensional network structure, resulting in a chemical gel being obtained.

[0019] Within the meaning of the present invention, the term "salinated" means that the acid functions present in the monomer are in the form of salts with cations, in particular with alkali metal salts, such as sodium or potassium cations, or with cations of nitrogen bases, such as ammonium salts, lysine salts or monoethanolamine salts (HOCH-CH-NH + ) and the like. They are preferably sodium or ammonium salts.

[0020] According to a particular embodiment of the present invention, said self-reversible inverse latex as defined above comprises from 20% to 90% by weight, more particularly from 30% to 90% by weight, more particularly from 30% to 80% by weight, more particularly even from 33% to 80% by weight of said crosslinked anionic polyelectrolyte (P).

[0021] According to another particular embodiment of the invention, the molar proportion of monomer units derived from 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid, in free acid form or in partially or completely salified form, present in said crosslinked anionic polyelectrolyte (P) is greater than or equal to 32 mol % and less than or equal to 100 mol %, more particularly greater than or equal to 40 mol % and less than or equal to 100 mol %.

[0022] According to a particular embodiment of the invention, the 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid is in the sodium or ammonium salt form.

[0023] Another subject of the invention is a method for producing a method comprising the steps of: a) preparation of an aqueous phase as defined above; b) preparing an organic phase comprising at least one oil (O) and a water-in-oil emulsifying surfactant (S1) system; c) mixing and emulsifying the aqueous phase and organic phase prepared in steps a) and b) to form an emulsion; d) inerting the emulsion with nitrogen; e) initiating the polymerization reaction by introducing a free radical initiator into the deactivated emulsion; f) introducing an oil-in-water emulsifying surfactant (S2) system into the reaction medium resulting from step e) at a temperature between 30°C and 60°C; a process for preparing an inverse latex as defined above, comprising:

[0024] Optionally, the method according to the invention may have the following characteristics: In step e), the radical initiator is hydrogen sulfite (HSO), such as the pair cumene hydroperoxide / sodium metabisulfite (NaSO) or the pair cumene hydroperoxide / thionyl chloride (SOCl). - ) is a redox pair that generates ions; - in step e), a polymerization co-initiator, preferably azobis(isobutyronitrile) is introduced into the inactivated emulsion; - in step a) the pH of the aqueous phase is adjusted to between 3.0 and 7.0, more particularly between 3.5 and 6.5, even more particularly between 4.0 and 6.5; - the reaction medium resulting from step e) is concentrated by distillation before carrying out step f); - the reaction medium resulting from step e) or f) is spray-dried One or more of the following may be indicated:

[0025] The oil (O) in the definition of the self-reversible reverse latex is in particular: - linear alkanes containing 11 to 19 carbon atoms; - The following and their INCI names: 7~8 Isoparaffin, C 8~9 Isoparaffin, C 9~11 Isoparaffin, C 9~12 Isoparaffin, C 9~13 Isoparaffin, C 9~14 Isoparaffin, C 9~16 Isoparaffin, C 10~11 Isoparaffin, C 10~12 Isoparaffin, C 10~13 Isoparaffin, C11~12 Isoparaffin, C 11~13 Isoparaffin, C 11~14 Isoparaffin, C 12~14 Isoparaffin, C 12~20 Isoparaffin, C 13~14 Isoparaffin, C 13~16 Branched alkanes containing 7 to 40 carbon atoms, such as those specified under isoparaffins, such as isododecane, isopentadecane, isohexadecane, isoheptadecane, isooctadecane, isononadecane or isoeicosane, or some mixtures thereof; - cycloalkanes optionally substituted with one or more linear or branched alkyl groups; - Name: Marcol TM 52. Marcol TM 82, Drakeol TM 6VR, Eolane TM 130, Eolane TM white mineral oil, such as that sold for 150; - hemisqualane (i.e. 2,6,10-trimethyldodecane; CAS number: 3891-98-3), squalane (i.e. 2,6,10,15,19,23-hexamethyltetracosane), hydrogenated polyisobutene or hydrogenated polydecene; - mixtures of alkanes containing 15 to 19 carbon atoms, said alkanes being linear alkanes, branched alkanes and cycloalkanes, more particularly mixtures (M1) which contain, per 100% of their weight, a proportion by weight of branched alkanes of ≥ 90% and ≤ 100%; a proportion by weight of linear alkanes of ≥ 0% and ≤ 9%, more particularly less than 5%, and a proportion by weight of cycloalkanes of ≥ 0% and ≤ 1%, for example products under the name Emogreen TM L15 or Emogreen TM Mixture sold at L19; - Formula (IV): - Z1-O-Z2(IV) (wherein Z1 and Z2, which may be the same or different, represent a linear or branched alkyl group containing 5 to 18 carbon atoms). fatty alcohol ethers of, for example, dioctyl ether, didecyl ether, didodecyl ether, dodecyl octyl ether, dihexadecyl ether, 1,3-dimethylbutyl tetradecyl ether, 1,3-dimethylbutyl hexadecyl ether, bis(1,3-dimethylbutyl) ether or dihexyl ether; - Formula (V): - R'1-(C=O)-O-R'2(V) (wherein R'1-(C=O) represents a saturated or unsaturated, linear or branched acyl group containing 8 to 24 carbon atoms, and R'2, independently of R'1, represents a saturated or unsaturated, linear or branched hydrocarbon chain containing 1 to 24 carbon atoms). Monoesters of fatty acids with alcohols, such as methyl laurate, ethyl laurate, propyl laurate, isopropyl laurate, butyl laurate, 2-butyl laurate, hexyl laurate, methyl cocoate, ethyl cocoate, propyl cocoate, Isopropyl cocoate, butyl cocoate, 2-butyl cocoate, hexyl cocoate, methyl myristate, ethyl myristate, propyl myristate, isopropyl myristate, butyl myristate, 2-butyl myristate, hexyl myristate, octyl myristate, methyl palmitate, ethyl palmitate, propyl palmitate, isopropyl palmitate, butyl palmitate, 2-butyl palmitate, hexyl palmitate, octyl palmitate, methyl oleate, ethyl oleate, propyl oleate, isopropyl oleate, butyl oleate, 2-butyl oleate, hexyl oleate, octyl oleate, methyl stearate, ethyl stearate, propyl stearate, isopropyl stearate, butyl stearate, 2-butyl stearate, hexyl stearate, octyl stearate, methyl isostearate, ethyl isostearate, propyl isostearate, isopropyl isostearate, butyl isostearate, 2-butyl isostearate, hexyl isostearate or isostearyl isostearate; of formula (VI) and formula (VII): R'3-(C=O)-O-CH2-CH(OH)-CH2-O-(C=O)-R'4(VI) R'5-(C=O)-O-CH2-CH[O-(C=O)-R'6]-CH2-OH (VII) (In the formulae (VI) and (VII), R'3-(C=O), R'4-(C=O), R'5-(C=O) and R'6-(C=O), which may be the same or different, represent saturated or unsaturated, linear or branched acyl groups containing 8 to 24 carbon atoms.) diesters of fatty acids with glycerol; - Formula (VIII): R'7-(C=O)-O-CH2-CH[O-(C=O)-R'8]-CH2-O-(C=O)-R'9(VIII) (In the formula, R'7-(C=O), R'8-(C=O), and R'9-(C=O), which may be the same or different, represent a linear or branched, saturated or unsaturated acyl group containing 8 to 24 carbon atoms.) Triester of fatty acid and glycerol means.

[0026] According to another particular aspect of the invention, said oil (O) is undecane, tridecane, isododecane or isohexadecane, a mixture (M1) as defined above and an oil named Emogreen TM L15, Emogreen TM L19, Emosmart TM L15, Emosmart TM L19, Emosmart TM V21, Isopar TM L or Isopar TM Mixtures of alkanes, isoalkanes, and cycloalkanes, such as those sold under M; Marcol TM 52. Marcol TM 82, Drakeol TM 6VR, Eolane TM 130 or Eolane TM150; hemisqualane, squalane, hydrogenated polyisobutene or hydrogenated polydecene; dioctyl ether or didecyl ether; isopropyl myristate, hexyl palmitate, octyl palmitate, isostearyl isostearate, octanoyl / decanoyl triglycerides, hexadecanoyl / octadecanoyl triglycerides or triglycerides obtained from rapeseed oil, sunflower oil, linseed oil or palm oil.

[0027] In the self-reversible inverse latex that is the subject of the present invention, the water-in-oil emulsifying surfactant (S1) system may consist of either a single emulsifying surfactant or a mixture of emulsifying surfactants, provided that the resulting emulsifying (S1) system has a sufficiently low HLB value to result in the formation of a water-in-oil emulsion.

[0028] Examples of water-in-oil emulsifying surfactants (S1) include esters of anhydrohexitols with saturated or unsaturated, linear or branched aliphatic carboxylic acids containing 12 to 22 carbon atoms, optionally substituted with one or more hydroxyl groups, more particularly esters of anhydrohexitols selected from anhydrosorbitol and anhydromannitol with saturated or unsaturated, linear or branched aliphatic carboxylic acids containing 12 to 22 carbon atoms, optionally substituted with one or more hydroxyl groups.

[0029] According to another particular embodiment of the invention, the emulsifying surfactant (S1) system of the water-in-oil type is sorbitan laurate, for example, under the name Montane TM 20, sorbitan palmitate, e.g. Montane TM 40, sorbitan stearate, e.g. Montane TM 60, sorbitan oleate, e.g. Montane TM 80, sorbitan sesquioleate, e.g. Montane TM85, sorbitan trioleate, e.g. Montane TM 83, sorbitan isolaurate, sorbitan isostearate, e.g., Montane TM 70, mannitan laurate, mannitan oleate, or a mixture of these esters; Hypermer TM Polyesters resulting from the condensation between poly(isobutenyl) succinic acid or its anhydride, such as 2296, with a molecular weight of 1000 to 3000, or the brand name Simaline TM The mixture sold under the trade name IE 501 A, formula (IX): [ka] [In the formula (IX), y2 represents an integer of 2 or more and 50 or less, Z4 represents a hydrogen atom, a methyl group, or an ethyl group, and Z3 represents a group represented by the formula (X): [ka] (In the formula (X), y'2 represents an integer of 0 or more and 10 or less, more particularly 1 or more and 10 or less.) and Z'3, being identical to or different from Z3, represents a group of formula (X) as defined above, or a hydrogen atom. and polyhydroxystearates of polyglycols.

[0030] Examples of water-in-oil emulsifying surfactants of formula (IX) that can be used to prepare the emulsifying surfactant (S1) system include those with the name Simaline TM PEG-30 Dipolyhydroxystearate, sold under the trade name Simaline, or containing PEG-30 Dipolyhydroxystearate, sold under the trade name Simaline. TM IE 201 A and Simaline TM Mixtures sold under IE 201 B or under the name Simaline TM IE 301 There is a mixture containing trimethylolpropane-30 tripolyhydroxystearate sold under B.

[0031] According to a particular embodiment of the invention, the oil-in-water emulsification system (S2) comprises, per 100% of its weight, a proportion of composition (Ce) greater than or equal to 50% by weight and less than or equal to 100%, wherein composition (Ce) comprises, per 100% of its weight: 10% to 60% by weight, more particularly 15% to 60% by weight, very particularly 15% to 50% by weight of formula (I): HO-[CH2-CH(OH)-CH2-O] n -H (I) (wherein n represents an integer of 1 or more and 15 or less) at least one compound of 40% to 90% by weight, more particularly 40% to 85% by weight, very particularly 50% to 85% by weight of formula (II): R1-(C=O)-[O-CH2-CH(OH)-CH2] p -OH (II) wherein p, which is different from or identical to n, represents an integer of 1 or greater and 15 or less; and wherein the R1-(C=O)- group represents a saturated or unsaturated, linear or branched aliphatic group containing 6 to 22 carbon atoms. and optionally at least one compound of - up to 30% by weight, more particularly from 0% to 25% by weight, very particularly from 0% to 20% by weight of formula (III): HO-[CH2-CHOH-CH2-O-] q -(G) r -H (III) (wherein q is different from or identical to n, represents an integer of 1 or more and 3 or less, G represents a residue of a reducing sugar, and r represents a decimal number of 1.05 or more and 5.00 or less). At least one composition (C 11 ) Including, The composition (C 11 ) are represented by the formulae (III1), (III2), (III3), (III4) and (III5): HO-[CH2-CHOH-CH2-O-] q -O-(G)1-H (III1), HO-[CH2-CHOH-CH2-O-] q -O-(G)2-H (III2), HO-[CH2-CHOH-CH2-O-] q -O-(G)3-H (III3), HO-[CH2-CHOH-CH2-O-] q -O-(G)4-H (III4), HO-[CH2-CHOH-CH2-O-] q -O-(G)5-H (III5) and In the molar proportions of said compounds of formulae (III1), (III2), (III3), (III4) and (III5) equal to a1, a2, a3, a4 and a5 respectively, the sum (a1+a2+a3+a4+a5) is equal to 1, and the sum (a1+2a2+3a3+4a4+5a5) is equal to r.

[0032] The oil-in-water emulsifying surfactant (S2) system consists either of composition (Ce) alone or of a mixture of said composition (Ce) with one or more other emulsifying surfactants, provided that the resulting emulsifying surfactant (S2) system has a sufficiently high HLB value to result in the formation of an oil-in-water emulsion.

[0033] Reducing sugars are meant to refer to saccharide derivatives of formula (III) as defined above, which in their structure do not exhibit a glycosidic bond established between the anomeric carbon and the oxygen of the acetal group, as defined in the reference publication: "Biochemistry", Daniel Voet / Judith G. Voet, page 250, John Wiley & Sons, 1990. Oligomeric structure (G) x can exist in any isomeric form, whether it relates to optical isomerism, geometric isomerism or positional isomerism; it It may also represent a mixture of isomers.

[0034] As regards the polymerization reaction, it is initiated in step e) at a preferential temperature of 10°C and then carried out either quasi-adiabatically or by controlling the temperature up to a temperature of 50°C or higher.

[0035] Another subject of the present invention is the use of said self-reversible reverse latex as defined above as a thickener and / or emulsifier and / or stabilizer in a topical composition, be it cosmetic or pharmaceutical.

[0036] Another subject of the present invention is a topical cosmetic composition (F) or a topical pharmaceutical composition (G), characterized in that it contains, as a thickener, from 0.1% to 10% by weight of said self-reversible reverse latex as defined above, per 100% of its total weight.

[0037] The expression "topical" as used in the definition of compositions (F) and (G) means that they are used by application to the skin, hair, scalp or mucous membranes, whether this relates to direct application, as in the case of cosmetics, dermocosmetics, dermopharmaceuticals or pharmaceutical preparations, or to indirect application, as in the case of body care products, for example in the form of textiles or paper wipes, or sanitary products intended to come into contact with the skin or mucous membranes.

[0038] The compositions (F) and (G) are generally provided in the form of aqueous or aqueous / alcoholic or aqueous / glycolic solutions, whether they are water-in-oil, oil-in-water, water-in-oil-in-water or oil-in-water-in-oil type, suspensions, emulsions, microemulsions or nanoemulsions.

[0039] The compositions (F) and (G) can be packaged in a bottle, in a "pump-action spray" type device, in pressurized form in an aerosol device, in a device with perforated walls, such as a grill, or in a device with a ball applicator (known as a "roll-on").

[0040] Generally, said compositions (F) and (G) also comprise excipients and / or active ingredients customarily used in formulations for topical use, in particular in the field of cosmetics, dermocosmetics, pharmaceuticals or dermopharmaceutical formulations, such as thickening and / or gelling surfactants, stabilizers, film-forming compounds, hydrotropic agents, plasticizers, emulsifiers and co-emulsifiers, opacifiers, pearlizing agents, superfatting agents, sequestering agents, chelating agents, antioxidants, fragrances, preservatives, conditioners, whitening agents intended for bleaching hair and skin, active ingredients intended to contribute to a treatment action on the skin or hair, sunscreens, pigments or inorganic fillers, particles providing a visual effect or intended for encapsulating active ingredients, exfoliating particles or texturizing agents.

[0041] Examples of foaming and / or cleansing surfactants that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include anionic, cationic, amphoteric or nonionic foaming and / or cleansing surfactants.

[0042] Anionic foaming and / or detersive surfactants that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include alkyl ether sulfates, alkyl sulfates, alkyl amido ether sulfates, alkyl aryl polyether sulfates, monoglyceride sulfates, α-olefin sulfonates, paraffin sulfonates, alkyl phosphates, and alkali metal salts, alkaline earth metal salts, ammonium salts, amine salts, or amino alcohol salts of alkyl ether phosphates, alkyl sulfonates, alkyl amido sulfonates, alkyl aryl sulfonates, alkyl carboxylates, alkyl sulfosuccinates, alkyl ether sulfosuccinates, alkyl amido sulfosuccinates, alkyl sulfoacetates, alkyl sarcosinates, acyl isethionates, N-acyltaurates, acyl lactylates, N-acylated derivatives of amino acids, N-acylated derivatives of peptides, N-acylated derivatives of proteins, or N-acylated derivatives of fatty acids.

[0043] Foaming and / or detersive amphoteric surfactants which may be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include alkylbetaines, alkylamidobetaines, sultaines, alkylamidoalkylsulfobetaines, imidazoline derivatives, phosphobetaines, amphopolyacetates and amphopropionates.

[0044] The cationic foaming and / or detersive surfactants that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include in particular quaternary ammonium derivatives.

[0045] The foaming and / or cleansing nonionic surfactants that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include, more particularly, alkyl polyglycosides containing linear or branched, saturated or unsaturated aliphatic groups and containing 8 to 16 carbon atoms, such as octyl polyglucoside, decyl polyglucoside, undecylenyl polyglucoside, dodecyl polyglucoside, tetradecyl polyglucoside, hexadecyl polyglucoside or 1,12-dodecanediyl polyglucoside; ethoxylated hydrogenated castor oil derivatives, such as the products sold under the INCI name "PEG-40 Hydrogenated Castor Oil"; polysorbates, such as Polysorbate 20, Polysorbate 40, Polysorbate 60, Polysorbate 70, Polysorbate 80 or Polysorbate 85; coconut amide; or N-alkylamines.

[0046] Examples of thickening and / or gelling surfactants that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include ethoxylated methyl polyglucoside esters, such as those designated Glucamate, respectively. TM LT and Glucamate TM Optionally alkoxylated alkyl polyglycoside fatty esters, such as PEG 120 methyl glucose trioleate and PEG 120 methyl glucose dioleate, sold under the name DOE-120; Crothix TM PEG 150 Pentaerythrityl Tetrastearate sold under DS53 or under the name Anti TM Alkoxylated fatty esters, such as PEG 55 propylene glycol oleate, sold under the name Elfacos 141 TM PPG-14 Laureth Isofloryl Dicarbamate sold under the name T211 or Elfacos TM Included are fatty chain polyalkylene glycol carbamates, such as PPG-14 Palmes-60 hexyl dicarbamate sold under the trade name GT2125.

[0047] Examples of thickeners and / or gelling agents that can be combined with the self-reversible reverse latex as defined above in the compositions (F) and (G) include copolymers of AMPS and alkyl acrylates, the carbon chain of which contains from 4 to 30, more particularly from 10 to 30, carbon atoms, at least one monomer having a free, partially chlorinated or fully chlorinated strong acid function, at least one neutral monomer, and a compound of formula (XIII): CH2=C(R'3)-C(=O)-[CH2-CH2-O] n’ -R'4( XIII) (wherein R'3 represents a hydrogen atom or a methyl group, R'4 represents a linear or branched alkyl group containing 8 to 30 carbon atoms, and n' represents a number of 1 or more and 50 or less). and linear, branched or crosslinked terpolymers with at least one monomer of the formula (I).

[0048] Examples of thickening and / or gelling agents that can be combined with the self-reversible reverse latex as defined above in the compositions (F) and (G) include polysaccharides consisting exclusively of monosaccharides, such as glucans or glucose homopolymers, glucomanoglucans, xyloglycans, galactomannans (whose degree of substitution (DS) of D-galactose units on the main D-mannose chain is between 0 and 1, more particularly between 1 and 0.25), e.g. galactomannans of cassia gum (DS=1 / 5), locust bean gum (DS=1 / 4), tara gum (DS=1 / 3), guar gum (DS=1 / 2) or fenugreek gum (DS=1).

[0049] Examples of thickening and / or gelling agents that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include sulfated galactans, more particularly carrageenans and agar, uronans, more particularly algin, alginates and pectins, heteropolymers of monosaccharides and uronic acids, more particularly xanthan gum, gellan gum, gum arabic exudate and gum karaya exudate, or polysaccharides consisting of monosaccharide derivatives, such as glycoaminoglycans.

[0050] Examples of thickeners and / or gelling agents that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include cellulose, cellulose derivatives such as methylcellulose, ethylcellulose or hydroxypropylcellulose, silicates, starch, hydrophilic starch derivatives or polyurethanes.

[0051] Examples of stabilizers that can be combined with the self-reversible reverse latexes as defined above in compositions (F) and (G) include single crystal waxes, more particularly ozokerite, inorganic salts such as sodium chloride or magnesium chloride, or silicone polymers such as polysiloxane polyalkyl polyether copolymers.

[0052] Examples of solvents that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include organic solvents such as glycerol, diglycerol, glycerol oligomers, ethylene glycol, propylene glycol, butylene glycol, 1,3-propanediol, 1,2-propanediol, hexylene glycol, diethylene glycol, xylitol, erythritol, sorbitol, water-soluble alcohols such as ethanol, isopropanol or butanol, or mixtures of water with the organic solvents.

[0053] Examples of thermal or mineral waters that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include thermal or mineral waters having a mineralization of at least 300 mg / L, in particular Avene water, Vittel water, Vichy basin water, Uriage water, La Roche-Posay water, La Bourboule water, Enghien-les-Bains water, Saint-Gervais-les-Bains water, Neris-les-Bains water, Allevard-les-Bains water, Digne water, Maizieres water, Neyrac-les-Bains water, Lons-le-Saunier water, Rochefort water, Saint Christau water, Les Fumades water and Tercis-les-Bains water.

[0054] Examples of hydrotropic agents that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include xylene sulfonate, cumene sulfonate, hexyl polyglucoside, 2-ethylhexyl polyglucoside, and n-heptyl polyglucoside.

[0055] Examples of emulsifying surfactants that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include nonionic surfactants, anionic surfactants or cationic surfactants.

[0056] Examples of emulsifying nonionic surfactants that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include those named Montane TM 40, Montane TM 60, Montane TM 70, Montane TM 80 and Montane TM Esters of fatty acids with sorbitol, such as the product sold under the trade name Simulsol TMCompositions containing glycerol stearate and stearic acid ethoxylated with 5 to 150 moles of ethylene oxide, such as a composition containing stearic acid ethoxylated with 135 moles of ethylene oxide and glycerol stearate sold under No. 165; mannitan esters; ethoxylated mannitan esters; sucrose esters; methyl glucoside esters; tetradecyl polyglucoside, hexadecyl polyglucoside, octadecyl polyglucoside, hexadecyl polyxyl alkyl polyglycosides containing a linear or branched, saturated or unsaturated aliphatic group and having 14 to 36 carbon atoms, such as 1-octyldodecyl polixyloside, octadecyl polixyloside, eicosyl poliglucoside, dodecosyl poliglucoside, 2-octyldodecyl polixyloside or 12-hydroxystearyl poliglucoside; compositions of linear or branched, saturated or unsaturated fatty alcohols containing 14 to 36 carbon atoms with alkyl polyglycosides, such as those described above, for example those under the name Montanov TM 68, Montanov TM 14. Montanov TM 82, Montanov TM 202, Montanov TM S., Montanov TM WO18, Montanov TM L, Fluidanov TM 20X and Easynov TM Examples of compositions include those sold by

[0057] Examples of anionic surfactants that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include soaps, such as glyceryl stearate citrate, cetearyl sulfate, sodium stearate or triethanolammonium stearate, and salified N-acylated derivatives of amino acids, such as stearoyl glutamate.

[0058] Examples of emulsifying cationic surfactants that can be combined with the self-reversible reverse latexes as defined above in compositions (F) and (G) include amine oxides, Quaternium-82 and surfactants described in patent application WO 96 / 00719, mainly those whose fatty chains contain at least 16 carbon atoms.

[0059] Examples of opacifying and / or pearlescent agents that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) 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 or fatty alcohols containing 12 to 22 carbon atoms.

[0060] Examples of texturing agents that can be combined with the self-reversible reverse latex as defined above in the compositions (F) and (G) include those named AminoHope TM N-acylated derivatives of amino acids, such as lauroyl lysine, sold under the name Dryflo TM Starch octenyl succinate, sold by Montanov TM Examples of suitable cellulose fibers include myristyl polyglucosides sold under the trade name of 14, cellulose fibers, cotton fibers, chitosan fibers, talc, sericite, or mica.

[0061] Examples of deodorants that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include alkali metal silicates, zinc salts such as zinc sulfate, zinc gluconate, zinc chloride or zinc lactate; quaternary ammonium salts such as cetyltrimethylammonium salts or cetylpyridinium salts; glycerol derivatives such as glycerol caprate, glycerol caprylate or polyglycerol caprate; 1,2-decanediol; 1,3-propanediol; salicylic acid; sodium bicarbonate; cyclodextrin; metallic zeolite; Triclosan TM aluminum bromohydrate, aluminum chlorohydrate, aluminum chloride, aluminum sulfate, aluminum zirconium chlorohydrate, aluminum zirconium trichlorohydrate, aluminum zirconium tetrachlorohydrate, aluminum zirconium pentachlorohydrate, aluminum zirconium octachlorohydrate, aluminum sulfate, sodium aluminum lactate, and complexes of aluminum chlorohydrate and glycol such as a complex of aluminum chlorohydrate and propylene glycol, a complex of aluminum dichlorohydrate and propylene glycol, a complex of aluminum sesquichlorohydrate and propylene glycol, a complex of aluminum chlorohydrate and polyethylene glycol, a complex of aluminum dichlorohydrate and polyethylene glycol, or a complex of aluminum sesquichlorohydrate and polyethylene glycol.

[0062] Examples of oils that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include mineral oils such as liquid paraffin, liquid petroleum jelly, isoparaffin or white mineral oil; oils of animal origin such as squalene or squalane; phytosqualane, 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 seed oil, pumpkin seed oil, evening primrose oil. vegetable oils, such as millet oil, barley oil, rye oil, safflower oil, candlenut oil, passionflower oil, hazelnut oil, palm oil, shea butter, apricot kernel oil, calophyllum oil, sissymbrium oil, avocado oil, calendula oil, oils derived from flowers or plants or ethoxylated vegetable oils; fatty acid esters, such as butyl myristate, propyl myristate, isopropyl myristate, cetyl myristate, isopropyl palmitate, octyl palmitate, butyl stearate, hexyl palmitate, Esters derived from lanolin, such as didecyl stearate, isopropyl stearate, octyl stearate, isocetyl stearate, dodecyl oleate, hexyl laurate, propylene glycol dicaprylate, isopropyl lanolate or isocetyl lanolate; fatty acid monoglycerides, diglycerides and triglycerides, such as glycerol triheptanoate; alkyl benzoates; hydrogenated oils; polyolefins, such as poly(α-olefins) and poly(isobutene); synthetic oils, such as synthetic isoalkanes, such as isohexadecane or isododecane, or perfluorinated oils; silicone oils, such as dimethylpolysiloxane, methylphenylpolysiloxane, amine-modified silicones, fatty acid-modified silicones, alcohol-modified silicones, alcohol- and fatty acid-modified silicones, polyether-modified silicones, epoxy-modified silicones, fluorinated-group-modified silicones, cyclic silicones and alkyl-modified silicones. The term "oil" is understood in the present patent application to mean compounds and / or mixtures of compounds that are insoluble in water and that exist under the appearance of a liquid at a temperature of 25°C.

[0063] Examples of waxes that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include beeswax, carnauba wax, candelilla wax, ouricle wax, Japan wax, cork fiber wax, sugarcane wax, paraffin wax, lignite wax, microcrystalline wax, lanolin wax; ozokerite wax, polyethylene wax, silicone wax, vegetable wax, fatty alcohols and fatty acids that are solid at ambient temperature, or glycerides that are solid at ambient temperature. The term "wax" is understood in this patent application to mean a compound and / or a mixture of compounds that are insoluble in water and that exist in a solid state at temperatures above 45°C.

[0064] Examples of active ingredients that can be combined with the self-reversible reverse latex as defined above in the compositions (F) and (G) are: 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 and their derivatives, in particular their esters, such as vitamin B3 or B10 (niacinamide and its derivatives); TM MSH, Sepicalm TM Compounds that have a lightening or depigmenting effect on the skin, such as ω-undecylenoylphenylalanine sold under the name VG, glycerol monoester and / or glycerol diester of ω-undecylenoylphenylalanine, ω-undecylenoyl dipeptide, arbutin, kojic acid, hydroquinone; compounds that have a smoothing effect, in particular Sepicalm TMS, allantoin and bisabolol; anti-inflammatory drugs; moisturizing compounds such as urea, hydroxyurea, glycerol, polyglycerol, glycerol glucoside, diglycerol glucoside, polyglyceryl glucoside, xylityl glucoside; polyphenol-rich plant extracts such as grape extract, pine extract, wine extract or olive extract; caffeine or its derivatives, Adiposlim TM , Adipoless TM compounds that exhibit slimming or lipolytic effects, such as fucoxanthin; N-acylated proteins; Matrixyl TM N-acylated peptides, N-acylated amino acids, N-acylated partial protein hydrolysates, amino acids, peptides, total protein hydrolysates, soy extracts, such as Raffermine TM wheat extracts, such as Tensine TM or Gliadine TM Plant extracts, such as tannin-rich plant extracts, isoflavone-rich plant extracts, or terpene-rich plant extracts; freshwater or seaweed extracts; marine plant extracts; general marine extracts, such as coral; essential waxes; bacterial extracts; ceramides; phospholipids; lipacides TM C8G, Lipacide TM UG, Sepicontrol TM A5; Octopirox TM or Sensiva TM Compounds that exhibit antibacterial or purifying activity, such as SC50; Physiogenyl TM , panthenol and its derivatives, e.g. Sepicap TM Compounds that exhibit energizing or stimulating properties, such as MP; Sepilift TM DPHP, Lipacide TM PVB, Sepivinol TM , Sepivital TM , Manoliva TM , Phyto-Age TM , Timecode TM Anti-aging active ingredients such as Survicode TMactive ingredients that increase the synthesis of extracellular matrix components, such as collagen, elastin or glycosaminoglycans; active ingredients that favor chemical cell communication, such as cytokinins, or physical cell communication, such as integrins; active ingredients that create a "heating" sensation on the skin, such as activators of cutaneous microcirculation (such as nicotinic acid derivatives), or products that create a "cool" sensation on the skin (such as menthol and derivatives); active ingredients that improve cutaneous microcirculation, such as benotonics; dehydrating active ingredients; Ginkgo biloba, ivy, sei Active ingredients with a decongestant purpose, such as horse chestnut, bamboo, Ruscus, raft, Centella asiatica, fucus, rosemary or willow extracts; agents for tanning or browning the skin, for example dihydroxyacetone (DHA), erythrulose, mesotartaric aldehyde, glutaraldehyde, glyceraldehyde, alloxan or ninhydrin, such as those described in European Patent Application No. 0 971 683, plant extracts, for example Pterocarpus santalinus, Pterocarpus osun, Pterocarpus soyauxii, African rosewood (Pterocarpus erinaceus), Pterocarpus indicus or Baphia nitida extracts of redwoods of the genus Pterocarpus and of the genus Baphia, such as Pterocarpus nitida; products sold by Provital under the brand name Carrot Oil (INCI name: Daucus carrota, Helianthus annuus sunflower oil), containing agents known for their effect of facilitating and / or accelerating the tanning and / or browning of human skin and / or for their effect of pigmenting human skin, such as carotenoids (more particularly β-carotene and γ-carotene), carotenoids, vitamin E and vitamin K; products sold by Provital under the brand name SunTan Accelerator, containing tyrosine and / or its derivatives, such as tyrosine and riboflavin (vitamin B), known for their effect on accelerating the tanning of human skin in combination with exposure to ultraviolet light. TM Products sold by Zymo A complex of tyrosine and tyrosinase, containing acetyltyrosine, sold under the brand name Zymo Tan Complex by Line, and brand name MelanoBronze by Mibelle TM(INCI name: Acetyl Tyrosine, Monk's Pepper (Vitex agnus-castus) Extract), a product sold by Unipex under the brand name Unipertan VEG-24 / 242 / 2002 (INCI name: Butylene Glycol and Acetyl Tyrosine with Hydrolyzed Vegetable Protein and Adenosine Triphosphate), a product containing mallow seed extract (i.e., loofah oil) sold by Sederma under the brand name Try-Excell TM (INCI name: Oleoyl Tyrosine and product sold under the name Luffa Cylindrica (seed oil and oleic acid), branded Actibronze by Alban Muller TM (INCI name: Hydrolyzed Wheat Protein and Acetyl Tyrosine and Copper Gluconate), a product sold by Synerga under the brand name Tyrostan TM Products sold under the brand name Tyrosinol (INCI name: Sorbitan Isostearate, Glyceryl Oleate, Caproyl Tyrosine) by Synerga, and products sold under the brand name InstaBronze by Alban Muller TM products marketed under the brand name Tyrosilane (INCI name: Methylsilanol and Acetyltyrosine) by Exymol; peptides known for their melanogenesis activating effect, such as products marketed under the brand name Bronzing SF Peptide powder (INCI name: Dextran and Octapeptide-5) by Infinitec Activos, products containing acetyl hexapeptide-1 known for its α-MSH agonist action, such as products marketed under the brand name Melitane (INCI name: Glycerin and Water with Dextran and Acetyl Hexapeptide-1) by Lipotec, and products marketed under the brand name Melatimes Solutions TM(INCI name: Butylene Glycol, Palmitoyl Tripeptide-40), sugars and sugar derivatives, e.g., Tanositol by Provital TM (INCI name: Inositol), a product marketed under the brand name Thalitan by CODIF International, containing oligosaccharides of marine origin (guluronic acid and mannuronic acid chelated with magnesium and manganese ions). TM (or Phycosacchar ide TM AG) (INCI name: Water and Hydrolyzed Algin (Laminaria digitata) and magnesium sulfate and manganese sulfate), products sold by Alban Muller under the brand name Melactiva TM (INCI name: Maltodextrin, Mucuna Pruriens Seed Extract), flavonoid-rich compounds, such as the product sold by Silab under the brand name "Biotanning" (INCI name: Hydrolyzed Citrus Aurantium dulcis Fruit Extract) and known to be rich in lemon flavonoids (of the hesperidin type); those described in the European patent application published under the number EP 1 515 688 A2, synthetic molecules that mimic SOD, such as manganese complexes, antioxidant compounds, such as cyclodextrin derivatives, silica-containing compounds derived from ascorbic acid, lysine pyrrolidone carboxylate or arginine pyrrolidone carboxylate, combinations of monoesters and diesters of cinnamic acid with vitamin C, more generally those described in the European patent application published under the number EP 1 515 688 Agents intended for the treatment of hair and / or body hair, such as mimetics of the activity of DOPAchrome tautomerase selected from those described in European patent application published under specification A2, for example agents that protect melanocytes of the hair follicle, protecting said melanocytes from cytotoxic agents that cause senescence and / or apoptosis of said melanocytes.

[0065] Examples of antioxidants that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include EDTA and its salts, citric acid, tartaric acid, oxalic acid, BHA (butylated hydroxyanisole), BHT (butylated hydroxytoluene), tocopherol derivatives such as tocopheryl acetate, Dissolvine Glycerol sold by AkzoNobel under the INCI name: Tetrasodium Glutamate Diacetate. TM and mixtures of antioxidant compounds such as GL 47S.

[0066] Examples of sunscreens that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include all those appearing in the amended Cosmetics Directive 76 / 768 / EEC, Annex VII.

[0067] Organic sunscreens that can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G) include para-aminobenzoic acid (PABA), in particular the series of benzoic acid derivatives such as the monoglycerol ester of PABA, the ethyl ester of N,N-propoxy PABA, the ethyl ester of N,N-diethoxy PABA, the ethyl ester of N,N-dimethyl PABA, the methyl ester of N,N-dimethyl PABA or the butyl ester of N,N-dimethyl PABA; the series of anthranilic acid derivatives such as homomenthyl N-acetylanthranilate; the series of salicylic acid derivatives such as amyl salicylate, homomenthyl salicylate, ethylhexyl salicylate, phenyl salicylate, benzyl salicylate or p-isopropylphenyl salicylate; ethylhexyl cinnamate. cinnamic acid derivatives such as ethyl 4-isopropylcinnamate, methyl 2,5-diisopropylcinnamate, propyl p-methoxycinnamate, isopropyl p-methoxycinnamate, isoamyl p-methoxycinnamate, octyl p-methoxycinnamate (2-ethylhexyl p-methoxycinnamate), 2-ethoxyethyl p-methoxycinnamate, cyclohexyl p-methoxycinnamate, ethyl α-cyano-β-phenylcinnamate, 2-ethylhexyl α-cyano-β-phenylcinnamate, or mono(2-ethylhexanoyl)glyceryl di(para-methoxycinnamate); 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2',4,4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4'-methylbenzophenone, A series of benzophenone derivatives, such as benzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, 2-ethylhexyl 4'-phenylbenzophenone-2,5-dicarboxylate, 2-hydroxy-4-(n-octyloxy)benzophenone, 4-hydroxy-3-carboxybenzophenone; 3-(4'-methylbenzylidene)-d,l-camphor, 3-benzylidene-d,l-camphor, camphor, etc. Benzalkonium methosulfate; urocanic acid, ethyl urocanate; sulfonic acid derivatives such as 2-phenylbenzimidazole-5-sulfonic acid and its salts; hydroxyphenyltriazine, ethylhexyloxyhydroxyphenyl-4-methoxyphenyltriazine, 2,4,6-trianilino(p-carbo-2'-ethylhexyl-1'-oxy)-1,3,5-triazine, 4,4-((6-(((1,1-dimethylethyl)benzoate triazine derivatives such as (2-ethylhexyl)amino)carbonyl)phenyl)amino)-1,3,5-triazine-2,4-diyldiimino)bis(2-ethylhexyl) ester; 2-phenyl-5-methylbenzoxazole, 2,2'-hydroxy-5-methylphenylbenzotriazole, 2-(2'-hydroxy-5'-(t-octyl)phenyl)benzotriazole, and 2-(2'-hydroxy-5'-methylphenyl)benzotriazo dibenzalazine; dianisoylmethane, 4-methoxy-4″-t-butylbenzoylmethane; 5-(3,3-dimethyl-2-norbornylidene)-3-pentan-2-one; the family of diphenyl acrylate derivatives such as 2-ethylhexyl 2-cyano-3,3-diphenyl-2-propenoate or ethyl 2-cyano-3,3-diphenyl-2-propenoate; or the family of polysiloxanes such as benzylidene siloxane malonate.

[0068] Inorganic sunscreen agents, also known as "inorganic filters", which can be combined with the self-reversible reverse latex as defined above in compositions (F) and (G), include titanium oxide, zinc oxide, cerium oxide, zirconium oxide, iron oxide, red iron oxide or black iron oxide, or chromium oxide. These inorganic filters may or may not be micronized, may or may not have been subjected to a surface treatment, and may optionally be provided in the form of an aqueous or oily pre-dispersion. [Example]

[0069] The following examples illustrate the present invention but do not limit it.

[0070] 1-Example 1.1 Preparation of an inverse latex (IL1) containing a crosslinked copolymer of the sodium salt of 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid and hydroxyethyl acrylate containing ethylenediaminedisuccinic acid in the trisodium salt form as a sequestering agent While stirring, combine: - 632.5 g of a 55% commercially available solution of the sodium salt of 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid - 19.6g hydroxyethyl acrylate - 0.143g methylenebisacrylamide - 0.62 g of a commercially available solution of ethylenediaminedisuccinic acid in the form of the trisodium salt (brand name Natriquest) TM (Sold for E30) - 0.1g copper sulfate pentahydrate is placed in a beaker.

[0071] Adjust the pH of the aqueous phase to 4.0. Make up the aqueous phase to 660g.

[0072] In parallel with the organic phase: - 240g isohexadecane - 21g of Montane TM 70(1) (1):Montane TM 70 is a sorbitan isostearate, water-in-oil surfactant sold by SEPPIC. It is prepared by mixing the following:

[0073] The aqueous phase prepared above is gradually added to the oil phase, and then the IKA TM Ultra-Turrax sold by TM Dispersion is achieved using a rotor-stator type.

[0074] The resulting emulsion is then transferred to a jacketed reactor and subjected to nitrogen bubbling to remove oxygen. A solution of 0.64% by weight of cumene hydroperoxide in isohexadecane is introduced and the emulsion is kept under stirring at ambient temperature for 5 minutes of homogenization.

[0075] The polymerization reaction is initiated using the redox couple: cumene hydroperoxide / sodium metabisulfite. Once the polymerization reaction is complete, the reaction medium is heated to 85° C. for 1 hour, then the entire mixture is cooled to approximately 35° C., after which 33.7 g of Montanox TM 60 (2) is added to the preparation.

[0076] The test is referred to as (IL1) and its characteristics are shown in Table 4. (2):Montanox TM 60 is a polyethoxylated sorbitan stearate, an oil-in-water surfactant sold by SEPPIC.

[0077] 1.2 Preparation of an inverse latex (IL2) containing a crosslinked copolymer of the sodium salt of 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid and hydroxyethyl acrylate containing sodium diethylenetriaminepentaacetate as a sequestering agent The same protocol as in Example 1.1 is carried out, except that 0.62 g of a commercially available solution of ethylenediaminedisuccinic acid in trisodium salt form is replaced with 0.45 g of a solution of sodium diethylenetriaminepentaacetate (brand name Versenex TM Replaced with (sold for 80).

[0078] The product is referred to as (IL2).

[0079] 1.3 Preparation of an inverse latex (IL3) containing a crosslinked copolymer of the sodium salt of 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid and hydroxyethyl acrylate containing the tetrasodium salt of glutamic acid, N,N-diacetic acid as a sequestering agent. The same protocol as in Example 1.1 is carried out, except that 0.62 g of a commercially available solution of ethylenediaminedisuccinic acid in trisodium salt form is replaced with 0.62 g of a solution of the tetrasodium salt of glutamic acid, N,N-diacetic acid (brand name Dissolvine TM Replaces the GLDA 47-S.

[0080] The product is referred to as (IL3).

[0081] 1.4 Preparation of an inverse latex (IL4) containing a crosslinked copolymer of the sodium salt of 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid and hydroxyethyl acrylate containing the sodium salt of iminosuccinic acid as a sequestering agent The same protocol as in Example 1.1 is carried out, except that 0.62 g of a commercially available solution of ethylenediaminedisuccinic acid in the form of its trisodium salt is replaced with 0.62 g of a solution of the sodium salt of iminosuccinic acid (brand name Baypure TM Replaced by the CX100.

[0082] The product is referred to as (IL4).

[0083] [Table 1]

[0084] In conclusion, the study on the copolymerization of 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid with 2-hydroxyethyl acrylate by inverse emulsion radical polymerization shows that in the presence of copper cations, the various chelating agents tested exhibit similar effectiveness. In each of the examples, the polymerizations exhibit similar characteristics: inhibition time, polymerization duration, and exothermicity. The self-reversible inverse latexes obtained under these conditions have comparable thickening properties in water and in the presence of electrolytes.

Claims

[Claim 1] a) at least one first monomer unit resulting from 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid in free acid or partially or completely salified form; at least one second monomer unit resulting from at least one monomer selected from the group consisting of 2-hydroxyethyl acrylate, 2,3-dihydroxypropyl acrylate, 2-hydroxyethyl methacrylate, 2,3-dihydroxypropyl methacrylate and vinylpyrrolidone; - at least one third monomer unit resulting from a polyethylene cross-linking monomer (AR); a crosslinked anionic polymer electrolyte (P) consisting of: b) at least one sequestering compound (SQ) selected from the group consisting of ethylenediaminedisuccinic acid in the form of its trisodium salt, the tetrasodium salt of glutamic acid, N,N-diacetic acid, and the tetrasodium salt of iminodisuccinic acid; A self-reversible inverse latex comprising an aqueous phase comprising:

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