Inverse latex for cosmetic compositions combining a specific metal ion sequestering agent and a polyelectrolyte having weak acid functional groups

Abstract

The present invention relates to a self-reversible reverse latex having an aqueous phase comprising: a) at least one first monomer unit derived from at least one monomer selected from the group consisting of acrylic acid, methacrylic acid, 2-carboxyethylacrylic acid, itaconic acid, maleic acid, 3-methyl-3-[(1-oxo-2-propenyl)amino]butanoic acid, wherein the carboxylic acid function of said monomer is in the free, partially salified or fully salified acid form; and a crosslinked anionic polyelectrolyte (P) consisting of at least one monomer unit derived from a polyethylene crosslinking monomer (AR); and b) ethylenediaminedisuccinic acid in the trisodium salt form.

Description

Technical Field

[0001] The present invention relates to a self-reversible inverse latex containing a novel metal ion sequestering agent, to a method for preparing the self-reversible inverse latex, to the use of the self-reversible inverse latex as a thickening agent and / or emulsifying agent and / or stabilizer for preparing a topical cosmetic or pharmaceutical composition, and also to the composition thus prepared.

Background Art

[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 a polar phase, for example a phase consisting of water, and in most cases require the use of a rheology-modifying polymer in order to increase the viscosity of these polar phases and also to impart a well-defined rheological behavior.

[0003] Among the rheology-modifying polymers for polar phases, natural polymers or synthetic polymers, in particular linear or branched, crosslinked or non-crosslinked, anionic or cationic or amphoteric polyelectrolyte-type polymers may be mentioned. These polymers, once introduced into the polar phase, have the property of spreading under the influence of electrostatic repulsive forces due to the presence of (negative and / or positive) charges on the linear or branched or crosslinked polymer backbone. The rheology modifier provides both an increase in the viscosity of the polar phase and also a certain consistency and / or stabilizing effect in the thickened cosmetic, skin cosmetic or skin pharmaceutical formulation.

[0004] To meet consumer needs and to improve topical cosmetic formulations, scientists have developed new, innovative and diverse polymer systems. Thus, polymers used in topical cosmetics or dermatologicals can act as film formers, rheology modifiers, enable the stabilization of the fatty phase in emulsions and cream gels or the stabilization of particles (pigments or fillers), or impart specific sensory properties (e.g., softness to the touch, ease of handling and application, freshness effect, etc.) after application to the skin and can also directly influence the appearance of the formulation (translucent or opaque).

[0005] Rheology-modifying polymers for the aqueous phase, mainly polyelectrolytes, result from the radical polymerization of (meth)acrylate-type monomers, i.e., esters derived from acrylic or methacrylic acid, or derivatives of acrylamide.

[0006] Today, these polymers, which can be in the form of inverse latex, concentrated inverse latex, or powder, enable the satisfaction of customer needs from the viewpoint of thickening performance in polar solvents such as, for example, water. The aqueous gels obtained once these polymers are dispersed in water are particle- and lump-free, have specific sensory properties when touched, a smooth appearance, and also ease of handling and application.

[0007] The liquid form, or its concentrated liquid form, known by the name "self-reversible inverse latex", is a composition in the form of an oil-in-water emulsion and - an aqueous phase containing, in itself, at least one polymer of the linear and / or branched and / or crosslinked anionic, or cationic, or amphoteric polyelectrolyte type, - a fatty phase containing at least one oil, - at least one oil-in-water type emulsifying surfactant (S 1 ), - at least one water-in-oil type emulsifying surfactant (S 2 ) and contains the polymer is obtained using an inverse emulsion radical polymerization process.

[0008] Free radical polymerization is known for its sensitivity to the presence of impurities, even in small amounts. Compounds that can cause a decrease in the rate of polymerization at low concentrations are known as inhibitors or retarders. However, the distinction between these two effects is not always straightforward, and the same compound can have both detrimental contributions depending on its concentration in the medium or the nature of the monomer and the reaction medium. The reproducible performance of thickening polymers for the aqueous phase must be ensured in order to guarantee the consistent quality of topical cosmetic formulations containing these polymers. For this purpose, industrial manufacturers must ensure that the polymerization reaction follows the same kinetics, more specifically with respect to the inhibition time, the temperature rise profile (°C / min), and the total duration of the polymerization reaction over time. Considering these constraints, factors that can affect the initiation of radical polymerization reactions, such as the presence of oxygen, which can retard the polymerization reaction by reacting with the generated radicals, are particularly noteworthy. These new peroxide radicals exhibit lower reactivity because their initiating ability is reduced. This results in lower initiation steps and lower growth reaction rates, and ultimately leads to polymers with different thickening properties. Therefore, it can be seen that, among other things, the step of deoxygenating the medium by purging with nitrogen before initiating the polymerization reaction is necessary.

[0009] Another factor that directly affects polymerization is, similarly, the presence of metal species (Fe 2+ 、Fe 3+ 、Cu 2+ 、…) that generate an inhibitory effect. In this case, inhibition can occur during the initiation stage by the reaction of the initiating radicals with the metal impurities, as a result of which the active radical centers can no longer fix another monomer unit and become inactive during polymerization.

[0010] The metal ions described above can potentially be derived from raw materials or equipment.

[0011] The monomers used for the preparation of self-reversible inverse latex may have trace amounts of metal cations. Similarly, it is not impossible to predict the presence of metal contaminants in industrial equipment undergoing polymerization reactions. In most cases, the equipment is made of stainless steel (commonly referred to as such), and there are several different types of stainless steel according to their composition. Stainless steel is an iron-based alloy to which nickel, chromium, or in some cases molybdenum is added. In the presence of oxygen, chromium gives stainless steel its antioxidant properties because it can regenerate its surface chromium oxide layer, which is itself called a passive layer.

[0012] However, in the presence of a pollution source, acid, moisture, long-term contact with spray or iron-bearing dust, or in the case of deep scratches, it is not impossible for the protective layer to become depassivated (and thus activated) at that time, and the stainless steel will oxidize more rapidly than it can protect itself. In these cases, the appearance of rust can allow an understanding of which rust is the source of iron-based metal contaminants.

[0013] Considering the risks associated with the presence of all these sources of metal contaminants, the use of metal ion sequestering agents is absolutely necessary. A commonly used product is the pentasodium salt of diethylenetriaminepentaacetic acid (brand name Versenex TM 80, also known as).

[0014] However, changes in European regulations regarding the classification of the pentasodium salt of diethylenetriaminepentaacetic acid have led to the search for alternative solutions as metal ion sequestering agents for the preparation of self-reversible inverse latex. Summary of the Invention Problems to be Solved by the Invention

[0015] The problem that arises therefrom is to provide a novel inverse latex using a novel metal ion sequestering agent that is as efficient as the pentasodium salt of diethylenetriaminepentaacetic acid and has characteristics showing great compatibility due to changes in regulations.

Means for Solving the Problem

[0016] The solution of the present invention is a) - At least one monomer selected from the elements of the group consisting of acrylic acid, methacrylic acid, 2-carboxyethylacrylic acid, itaconic acid, maleic acid, 3-methyl-3-[(1-oxo-2-propenyl)amino]butanoic acid, wherein the carboxylic acid functional group of the monomer is in the free acid form, partially chlorinated form or fully chlorinated form, and at least one monomer unit derived from the monomer; and - At least one monomer unit derived from a polyethylene crosslinking monomer (AR) A crosslinked anionic polyelectrolyte (P) consisting of b) Ethylenediaminedisuccinic acid in the trisodium salt form An aqueous phase containing a self-reversible inverse latex.

[0017] Actually, the self-reversible inverse latex according to the present invention has the following characteristics: - The aqueous phase contains at least 0.01 mol% of ethylenediaminedisuccinic acid in the trisodium salt form; - The polyethylene crosslinking monomer (AR) is selected from methylenebis(acrylamide), ethylene glycol dimethacrylate, diethylene glycol diacrylate, ethylene glycol diacrylate, diallyl urea, triallylamine, trimethylolpropane triacrylate, diallyloxyacetic acid or its salts such as sodium diallyloxyacetate, or a mixture of these compounds; - The crosslinking monomer (AR) is methylenebis(acrylamide) or triallylamine; - The self-reversible inverse latex contains 10% to 90% by weight of the crosslinked anionic polyelectrolyte (P) can indicate one or more of.

Mode for Carrying Out the Invention

[0018] For the purposes of the present invention, the “crosslinked anionic polyelectrolyte (P)” means a non-linear polyelectrolyte provided in the form of a three-dimensional network structure that is insoluble in water but can swell in water with respect to the polymer (P), resulting in the formation of a chemical gel.

[0019] For the purposes of the present invention, the term “chlorinated” indicates that the acid functional groups present in the monomer are in an anionic form combined with cations such as sodium or potassium cations, in the form of salts with cations, particularly alkali metal salts, or cations of nitrogen bases, such as ammonium salts, lysine salts or monoethanolamine salts (HOCH 2 -CH 2 -NH 3 + ). etc. They are preferably sodium or ammonium salts.

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

[0021] The subject matter of the present invention also includes the following steps: a) preparing an aqueous phase as defined above; b) preparing an organic phase containing at least one oil and a water-in-oil type emulsifying surfactant system (S 1 ); c) mixing and emulsifying the aqueous phase and the organic phase prepared in steps a) and b) to form an emulsion; d) inactivating the emulsion with nitrogen; e) Initiating the polymerization reaction by introducing a free radical initiator into an inactivated emulsion; f) Introducing an oil-in-water emulsifier system (S 2 ) at a temperature of 30 °C to 60 °C into the reaction medium resulting from step e); It is a method for preparing an inverse latex as defined above, comprising:

[0022] In some cases, the method according to the invention has the following features: - The method includes adding a solution selected from a sodium hydroxide solution, a potassium hydroxide solution, an ammonium hydroxide solution, a monoethanolamine salt solution, and a lysine salt solution to the aqueous phase prepared in step a) between steps a) and b); - In step e), the radical initiator is a redox pair that generates bisulfite (HSO 2 S 2 O 5 ) ions, such as cumene hydroperoxide / sodium metabisulfite (Na 2 ) pair or cumene hydroperoxide / thionyl chloride (SOCl 3 - ) pair; - 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 3.0 to 7.0, more particularly 3.5 to 6.5, and even more particularly 4.0 to 6.5; - The reaction medium resulting from step e) is concentrated by distillation before performing step f); - The reaction medium resulting from step e) or f) can be spray-dried and may have one or more of the above.

[0023] The term "oil (O)" in the definition of the self-reversible inverse latex particularly refers to: - Linear alkanes containing 11 to 19 carbon atoms; - Those described below and their INCI names: C 7~8Isoparaffin, 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, C 11~12 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 by isoparaffin, isododecane, isopentadecane, isohexadecane, isoheptadecane, isooctadecane, isononadecane or icosane, or mixtures of several of them; - Cycloalkanes optionally substituted with one or more linear or branched alkyl groups; - The following names: Marcol TM 52, Marcol TM 82, Drakeol TM 6VR, Eolane TM 130 or Eolane TM White mineral oil, such as products sold under - Hemisqualane (i.e., 2,6,10-trimethyldodecane; CAS No.: 3891-98-3), squalane (i.e., 2,6,10,15,19,23-hexamethyltetracosane), hydrogenated polyisobutene or hydrogenated polydecene; - A mixture of alkanes containing 15 to 19 carbon atoms (the alkanes are linear alkanes, branched alkanes and cycloalkanes), more particularly, a branched alkane in a weight ratio of 90% or more and 100% or less, based on 100% of its weight; a linear alkane in a weight ratio of 0% or more and 9% or less, more particularly less than 5%, and a cycloalkane in a weight ratio of 0% or more and 1% or less (Mixture M 1) For example, named Emogreen TM L15 or Emogreen TM The mixture sold at L19; - Formula (IV): Z 1 -O-Z 2 (IV) (wherein, Z which may be the same or different 1 and Z 2 each represent a linear or branched alkyl group containing 5 to 18 carbon atoms) of fatty alcohol ethers, 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 from R’ 1 represents a saturated or unsaturated, linear or branched hydrocarbon-based chain containing 1 to 24 carbon atoms) Monoesters of fatty acids and 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, isostearyl isostearate; - of formula (VI) and formula (VII): R’ 3 -(C=O)-O-CH 2 -CH(OH)-CH 2 -O-(C=O)-R’ 4 (VI) R’ 5 -(C=O)-O-CH 2 -CH[O-(C=O)-R’ 6 -CH 2 -OH (VII) (In formulas (VI) and (VII), R’ which may be the same or different 3 -(C=O), R’ 4 -(C=O), R’ 5 -(C=O) and R’ 6-(C=O) represents a saturated or unsaturated, linear or branched acyl group containing 8 to 24 carbon atoms) a diester of a fatty acid and glycerol; - Formula (VIII): R’ 7 -(C=O)-O-CH 2 -CH[O-(C=O)-R’’ 8 -CH 2 -O-(C=O)-R’’ 9 (VIII) (wherein R’, which may be the same or different, 7 -(C=O), R’ 8 -(C=O) and R’ 9 -(C=O) represents a saturated or unsaturated, linear or branched acyl group containing 8 to 24 carbon atoms) a triester of a fatty acid and glycerol is meant.

[0024] According to another specific aspect of the present invention, the oil (O) is undecane, tridecane, isododecane or isohexadecane, for example, a mixture (M 1 ) as defined above and mixtures of alkanes, isoalkanes and cycloalkanes sold under the names Emogreen TM L15, Emogreen TM L19, Emosmart TM L15, Emosmart TM L19, Emosmart TM V21, Isopar TM L or Isopar TM M; mixtures of alkanes, isoalkanes and cycloalkanes sold under the names Marcol TM 52, Marcol TM 82, Drakeol TM 6VR, Eolane TM 130 or Eolane TMWhite mineral oil sold at 150; hemisqualane, squalane, hydrogenated polyisobutene or hydrogenated polydecene; dioctyl ether or didecyl ether; isopropyl myristate, hexyl palmitate, octyl palmitate, isostearyl isostearate, octanoyl / decanoyl triglyceride, hexadecanoyl / octadecanoyl triglyceride, or triglycerides derived from rapeseed oil, sunflower oil, linseed oil or coconut oil.

[0025] In the self-reversible inverse latex which is the subject of the present invention, the water-in-oil type emulsifying surfactant system (S 1 ) consists of a single emulsifying surfactant or a mixture of emulsifying surfactants, provided that the resulting emulsifying system (S 1 ) has an HLB value low enough to result in the formation of a water-in-oil type emulsion.

[0026] Examples of the water-in-oil type emulsifying surfactant (S 1 ) include esters of anhydrohexitol and linear or branched, saturated or unsaturated aliphatic carboxylic acids containing 12 to 22 carbon atoms optionally substituted with one or more hydroxyl groups, more particularly esters of anhydrohexitol selected from anhydro sorbitol and anhydro mannitol and linear or branched, saturated or unsaturated aliphatic carboxylic acids containing 12 to 22 carbon atoms optionally substituted with one or more hydroxyl groups.

[0027] According to another specific aspect of the present invention, the water-in-oil type emulsifying surfactant system (S 1 ) is sorbitan laurate, for example that sold under the name Montane TM 20, sorbitan palmitate, for example that sold under the name Montane TM 40, sorbitan stearate, for example that sold under the name Montane TM 60, sorbitan oleate, for example that sold under the name Montane TMThose sold at 80, sorbitan sesquioleate, for example under the name Montane TM Those sold at 85, sorbitan trioleate, for example under the name Montane TM Those sold at 83, sorbitan isolaureate, sorbitan isostearate, for example under the name Montane TM Those sold at 70, mannitol laurate, mannitol oleate and mixtures of these esters; Hypermer TM Polyesters resulting from the condensation between polyisobutenyl succinic acid or its anhydride and having a molecular weight between 1000 and 3000 such as 2296, or under the brand name Simaline TM Mixture sold under IE 501 A, formula (IX): [Chemical formula] [In formula (IX), y 2 represents an integer from 2 to 50, and Z 4 represents a hydrogen atom, a methyl group or an ethyl group, and Z 3 is of formula (X): [Chemical formula] (In formula (X), y’ 2 represents an integer from 0 to 10, more particularly from 1 to 10) represents a group of 3 and Z’ 3 is either the same as Z 3 or different therefrom, and represents a group of formula (X) as defined above, or a hydrogen atom) selected from the elements of the group consisting of polyhydroxystearates of polyglycols of

[0028] Examples of oil-in-water emulsifying surfactants of formula (IX) that can be used to prepare an emulsion system (S 1 ) include, under the name Simaline TM PEG-30 dipolyhydroxystearate, sold under WO, or containing PEG-30 dipolyhydroxystearate, under the name Simaline TMIE 201 A and Simaline TM A mixture sold as IE 201 B, or the name Simaline TM There is a mixture containing trimethylolpropane - 30 tripolyhydroxystearate sold as IE 301 B.

[0029] According to a particular aspect of the present invention, an oil - in - water emulsion system (S 2 ) contains, per 100% by weight thereof, a composition (Ce) in a proportion of 50% by weight or more and 100% by weight or less, and the composition (Ce) contains, per 100% by weight thereof: - From 10% by weight to 60% by weight, more particularly from 15% by weight to 60% by weight, very particularly from 15% by weight to 50% by weight of formula (I): HO - [CH 2 -CH(OH)-CH 2 -O] n -H (I) (wherein n represents an integer of 1 or more and 15 or less) of at least one compound; - From 40% by weight to 90% by weight, more particularly from 40% by weight to 85% by weight, very particularly from 50% by weight to 85% by weight of formula (II): R 1 -(C=O)-[O - CH 2 -CH(OH)-CH 2 p -OH (II) (wherein p, which is different from or the same as n, represents an integer of 1 or more and 15 or less; and in the formula, the group R 1 -(C=O)- represents a saturated or unsaturated, linear or branched aliphatic group containing 6 to 22 carbon atoms) of at least one compound; and optionally - 30% by weight or less, more particularly 0% by weight to 25% by weight, very particularly 0% by weight to 20% by weight of formula (III): HO - [CH 2 -CHOH - CH 2 -O - ] q -(G) r -H (III) ​(wherein n is different from or the same as n, q represents an integer of 1 or more and 3 or less, G represents a residue of a reducing sugar, and r represents a decimal of 1.05 or more and 5.00 or less) at least one composition (C 11 ) comprising said composition (C 11 ) is of formula (III 1 ), (III 2 ), (III 3 ), (III 4 ) and (III 5 ): HO-[CH 2 -CHOH-CH 2 -O-] q -O-(G) 1 -H (III 1 ), HO-[CH 2 -CHOH-CH 2 -O-] q -O-(G) 2 -H (III 2 ), HO-[CH 2 -CHOH-CH 2 -O-] q -O-(G) 3 -H (III 3 ), HO-[CH 2 -CHOH-CH 2 -O-] q -O-(G) 4 -H (III 4 ), HO-[CH 2 -CHOH-CH 2 -O-] q -O-(G) 5 -H (III 5 ) consisting of a mixture of compounds of a 1 , a 2 , a 3 , a 4 and a 5 respectively equal to formula (III 1 ), (III 2 ), (III 3), (III 4 ), and (III 5 ) in the molar ratio of said compounds, the total (a 1 + a 2 + a 3 + a 4 + a 5 ) is such that it is equal to 1, and the total (a 1 + 2a 2 + 3a 3 + 4a 4 + 5a 5 ) is such that it is equal to r.

[0030] The oil-in-water emulsion system (S 2 ) is either composed of the composition (C 2 ) alone or a mixture of the composition (C e ) and one or more other emulsifying surfactants, provided that the resulting emulsion system (S e ) has a sufficiently high HLB value to result in the formation of an oil-in-water emulsion.

[0031] The term "reducing sugar" means, in formula (III) as defined above, a saccharide derivative that does not have a glycosidic bond established between the anomeric carbon and the oxygen of the acetal group in its structure, as defined in the reference publication: "Biochemistry, Daniel Voet / Judith G. Voet, p. 250, John Wiley & Sons, 1990". The oligomer structure (G x ) can be in any form of isomerism, whether optical, geometric or positional; it can also represent a mixture of isomers.

[0032] Regarding the polymerization reaction, it is initiated in step e) at a preferred temperature of 10 °C and then carried out either quasi-adiabatically to a temperature of 50 °C or higher or by controlling the temperature.

[0033] Another subject of the present invention is the use of the above-defined self-reversible inverse latex as a thickening agent and / or emulsifying agent and / or stabilizer for a composition for topical cosmetic or pharmaceutical use.

[0034] Another subject of the present invention is a topical cosmetic composition (F) or topical pharmaceutical composition (G), characterized in that it contains, as a thickening agent, from 0.1% to 10% by weight of the above-defined self-reversible inverse latex per 100% of its total weight.

[0035] The expression "topical" used in the definition of the compositions (F) and (G) means that they are used by application to the skin, hair, scalp or mucous membranes, whether it be direct application, as in the case of cosmetics, skin cosmetics, skin pharmaceuticals or pharmaceutical preparations, or indirect application, as in the case of body care products in the form of, for example, fabrics or paper wipes, or physiological products intended to come into contact with the skin or mucous membranes.

[0036] The compositions (F) and (G) are generally provided in the form of an aqueous or aqueous / alcoholic or aqueous / glycol solution, whether they are of the oil-in-water, water-in-oil, water-in-oil-in-water or oil-in-water-in-oil type, in the form of a suspension, an emulsion, a microemulsion or a nanoemulsion.

[0037] The compositions (F) and (G) can be filled into bottles, into devices of the "pump-action spray" type, into aerosol devices under pressure, into devices with a perforated wall, such as a grill, or into devices equipped with a ball applicator (known as a "roll-on").

[0038] Generally, the compositions (F) and (G) also include thickening and / or gelling surfactants, stabilizers, film-forming compounds, water-repellent agents, plasticizers, emulsifiers and co-emulsifiers, opacifiers, pearlescent agents, superfatting agents, sequestering agents, chelating agents, antioxidants, fragrances, preservatives, modifiers, whitening agents for bleaching body hair and skin, active ingredients intended to contribute to treatment effects on the skin or hair, sunscreen agents, pigments or inorganic fillers, particles for providing a visual effect or encapsulating active ingredients, exfoliating particles or texturing agents, etc., which are excipients and / or active ingredients customarily used in the field of topical formulations, particularly in the fields of cosmetics, skin cosmetics, pharmaceuticals or skin pharmaceutical formulations.

[0039] Examples of foaming and / or detergency surfactants that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include anionic, cationic, amphoteric or nonionic foaming and / or detergency surfactants.

[0040] Examples of anionic foaming and / or detergency surfactants that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include alkali metal, alkaline earth metal, ammonium, amine or amino alcohol salts of alkyl ether sulfates, alkyl sulfates, alkyl amide ether sulfates, alkyl aryl polyether sulfates, monoglyceride sulfates, α-olefin sulfonates, paraffin sulfonates, alkyl phosphates, alkyl ether phosphates, alkyl sulfonates, alkyl amide sulfonates, alkyl aryl sulfonates, alkyl carboxylates, alkyl sulfosuccinates, alkyl ether sulfosuccinates, alkyl amide sulfosuccinates, alkyl sulfoacetates, alkyl sarcosinates, acyl isethionates, N-acyl taurates, 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.

[0041] Examples of the foaming and / or detergency amphoteric surfactants that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include alkyl betaines, alkylamide betaines, sultaines, alkylamide alkylsulfobetaines, imidazoline derivatives, phosphobetaines, amphopolyacetates, and amphopropionates.

[0042] Examples of the foaming and / or detergency cationic 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.

[0043] Examples of the foaming and / or detergency nonionic surfactants that can be combined with the self-reversible inverse latex as defined above in the 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 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.

[0044] Examples of the thickening and / or gelling surfactants that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include ethoxylated methyl polyglucoside esters, for example, each with the name Glucamate TM LT and Glucamate TMOptionally alkoxylated alkyl polyglycoside fatty esters such as PEG 120 methyl glucose trioleate and PEG 120 methyl glucose dioleate sold under DOE-120; name Crothix TM PEG 150 pentaerythritol tetrastearate sold under DS53 or name Antil TM Alkoxylated fatty esters such as PEG 55 propylene glycol oleate sold under 141; name Elfacos TM PPG-14 lauryl isophoryl dicarbamate sold under T211 or name Elfacos TM Examples of fatty chain polyalkylene glycol carbamates such as PPG-14 palmites-60 hexyl dicarbamate sold under GT2125

[0045] Examples of thickeners and / or gelling agents that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include copolymers of AMPS and alkyl acrylates (the carbon chain of which contains 4 to 30, more particularly 10 to 30 carbon atoms), at least one monomer having free, partially chlorinated or fully chlorinated strong acid functional groups, at least one neutral monomer, and a linear, branched or crosslinked terpolymer with at least one monomer of formula (XIII): CH 2 =C(R’ 3 )-C(=O)-[CH 2 -CH 2 -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) include linear, branched or crosslinked terpolymers with at least one monomer of

[0046] Examples of thickeners and / or gelling agents that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include glucans or glucose homopolymers, glucomannoglucans, xyloglucans, galactomannans (the degree of substitution (DS) of D-galactose units on the main D-mannose chain is from 0 to 1, more particularly from 1 to 0.25), for example, galactomannans of the origin 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), polysaccharides consisting solely of monosaccharides.

[0047] Examples of thickeners and / or gelling agents that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include sulfated galactans, more particularly carrageenan and agar, uronans, more particularly algin, alginates and pectin, heteropolymers of monosaccharides and uronic acids, more particularly xanthan gum, gellan gum, gum arabic exudate and karaya gum exudate, or glucosaminoglycans, polysaccharides consisting of monosaccharide derivatives.

[0048] Examples of thickeners and / or gelling agents that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include cellulose derivatives such as cellulose, methyl cellulose, ethyl cellulose or hydroxypropyl cellulose, silicates, starch, hydrophilic starch derivatives or polyurethanes.

[0049] Examples of stabilizers that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include monocrystal waxes, more particularly ozokerite, inorganic salts such as sodium chloride or magnesium chloride, or silicone polymers such as polysiloxane polyalkyl polyether copolymers.

[0050] Examples of solvents that can be combined with the self-reversible inverse latex as defined above in the 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 and the organic solvents.

[0051] Examples of thermal water or mineral water that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include thermal water or mineral water 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, Allard-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.

[0052] Examples of dehydrating agents that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include xylene sulfonate, cumene sulfonate, hexyl polyglucoside, 2-ethylhexyl polyglucoside and n-heptyl polyglucoside.

[0053] Examples of emulsifying surfactants that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include nonionic surfactants, anionic surfactants or cationic surfactants.

[0054] Examples of emulsifying nonionic surfactants that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include products sold under the names Montane TM 40, Montane TM 60, Montane TM 70, Montane TM 80 and Montane TM 85, such as esters of fatty acids and sorbitol; compositions containing stearic acid ethoxylated with 135 mol of ethylene oxide and glycerol stearate sold under the name Simulsol TM 165, such as compositions containing glycerol stearate and stearic acid ethoxylated with 5 mol to 150 mol of ethylene oxide; mannitol esters; ethoxylated mannitol esters; sucrose esters; methyl glucoside esters; linear or branched, saturated or unsaturated alkyl polyglycosides containing an aliphatic group and having 14 to 36 carbon atoms, such as tetradecyl polyglycoside, hexadecyl polyglycoside, octadecyl polyglycoside, hexadecyl polyxyloside, octadecyl polyxyloside, eicosyl polyglycoside, dodecyl polyglycoside, 2-octyldodecyl polyxyloside or 12-hydroxystearyl polyglycoside; compositions of linear or branched, saturated or unsaturated fatty alcohols containing 14 to 36 carbon atoms and alkyl polyglycosides as described above, for example products sold under the names 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 and compositions sold under these names may be mentioned.

[0055] Examples of anionic surfactants that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include soaps such as glyceryl stearate citrate, cetearyl sulfate, sodium stearate or triethanolammonium stearate, and N-acylated derivatives of chlorinated amino acids, for example stearoyl glutamate.

[0056] Examples of emulsifying cationic surfactants that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include amine oxides, quaternium-82 and the surfactants described in WO 96 / 00719 pamphlet, and mainly those whose fatty chain contains at least 16 carbon atoms.

[0057] Examples of opacifying agents and / or pearlescent agents that can be combined with the self-reversible inverse latex as defined above in the 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.

[0058] Examples of texturing agents that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include N-acylated derivatives of amino acids such as lauroyl lysine sold under the name Aminohope TM LL, starch octenyl succinate sold under the name Dryflo TM and myristyl polyglucoside sold under the name Montanov TM 14, cellulose fibers, cotton fibers, chitosan fibers, talc, sericite or mica.

[0059] Examples of deodorants that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include zinc salts such as alkali metal silicates, 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, complex of aluminum chlorohydrate and propylene glycol, complex of aluminum dichlorohydrate and propylene glycol, complex of aluminum sesquichlorohydrate and propylene glycol, complex of aluminum chlorohydrate and polyethylene glycol, complex of aluminum dichlorohydrate and polyethylene glycol, or complex of aluminum sesquichlorohydrate and polyethylene glycol, etc., complexes of aluminum chlorohydrate and glycol

[0060] Examples of oils that can be combined with the self-reversible inverse latex as defined above in the 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; vegetable oils such as 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, safflower oil, candlenut oil, asparagus oil, hazelnut oil, palm oil, shea butter, apricot kernel oil, carophyllum oil, cichorium intybus oil, avocado oil, calendula oil, oils derived from flowers or plants or ethoxylated vegetable oils; esters derived from lanolinic acid such as fatty acid esters, for example butyl myristate, propyl myristate, isopropyl myristate, cetyl myristate, isopropyl palmitate, octyl palmitate, butyl stearate, hexadecyl 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 benzoate, hydrogenated oils, polyolefins such as poly(α-olefin), poly(isobutene), synthetic isoalkanes such as isohexadecane or isododecane, or synthetic oils such as perfluorinated oils; silicone oils such as dimethylpolysiloxane, methylphenylpolysiloxane, silicone modified with an amine, silicone modified with a fatty acid, silicone modified with an alcohol, silicone modified with an alcohol and a fatty acid, silicone modified with a polyether group, epoxy modified silicone, silicone modified with a fluorinated group, cyclic silicone and silicone modified with an alkyl group. In the present application, the term "oil" refers to a compound and / or mixture of compounds that is insoluble in water at a temperature of 25 °C and has a liquid appearance.

[0061] Examples of waxes that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include beeswax, carnauba wax, candelilla wax, oricury wax, wood wax, cork fiber wax, sugar cane wax, paraffin wax, lignite wax, microcrystalline wax, lanolin wax; ozokerite, polyethylene wax, silicone wax, plant waxes, fatty alcohols and fatty acids that are solid at ambient temperature, or glycerides that are solid at ambient temperature. In the present application, the term "wax" refers to compounds and / or mixtures of compounds that are insoluble in water and have a solid appearance at a temperature of 45°C or higher.

[0062] Examples of active ingredients that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include 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, especially their esters, such as vitamin B3 or B10 (niacinamide and its derivatives); the compound named Sepiwhite TM MSH, Sepicalm TM ω-undecylenoyl phenylalanine sold under the name VG, glycerol monoester and / or glycerol diester of ω-undecylenoyl phenylalanine, ω-undecylenoyl dipeptide, arbutin, kojic acid, hydroquinone, and other compounds that exhibit a skin lightening or depigmenting effect; compounds that exhibit a smoothing effect, especially Sepicalm TMS, allantoin and bisabolol; anti-inflammatory agents; compounds showing a moisturizing effect such as urea, hydroxyurea, glycerol, polyglycerol, glycerol glucoside, diglycerol glucoside, polyglyceryl glucoside, xylityl glucoside; plant extracts rich in polyphenols such as grape extract, pine extract, wine extract or olive extract; caffeine or its derivatives, Adiposlim TM , Adipoless TM , compounds showing a slimming or lipolytic effect such as fucoxanthin; N-acylated proteins; Matrixyl TM such as N-acylated peptides; N-acylated amino acids; partial hydrolysates of N-acylated proteins; amino acids; peptides; total hydrolysates of proteins; soybean extracts such as Raffermine TM ; wheat extracts such as Tensine TM or Gliadine TM ; plant extracts such as plant extracts rich in tannins, plant extracts rich in isoflavones or plant extracts rich in terpenes; extracts of freshwater or marine algae; marine plant extracts; general marine extracts such as coral; essential waxes; bacterial extracts; ceramides; phospholipids; Lipacide TM C8G, Lipacide TM UG, Sepicontrol TM A5; Octopirox TM or Sensiva TM SC50 and other compounds showing antibacterial or purifying effects; Physiogenyl TM , panthenol and its derivatives such as Sepicap TM MP and other compounds showing energy-providing or stimulating properties; Sepilift TM DPHP, Lipacide TM PVB, Sepivinol TM , Sepivital TM , Manoliva TM , Phyto-Age TM , Timecode TM and other anti-aging active ingredients; Survicode TM; Active ingredients for preventing photoaging; Active ingredients for protecting the integrity of the epidermis-dermis junction; Active ingredients for increasing the synthesis of components of the extracellular matrix such as collagen, elastin or glycosaminoglycans; Active ingredients that act favorably on chemical cell communication such as cytokines or physical cell communication such as integrins; Active ingredients that produce a "heating" sensation on the skin, such as activators of skin microcirculation (e.g., nicotinic acid derivatives), or products that produce a "coolness" sensation on the skin (e.g., menthol and derivatives); Active ingredients for improving skin microcirculation, such as venotonic; Dehydrating active ingredients; Active ingredients for the purpose of removing stasis, such as extracts of Ginkgo biloba, ivy, English holly, bamboo, Ruscus, climbing fern, Centella asiatica, Japanese butterbur, rosemary or willow; Agents for sunburning or browning the skin, such as dihydroxyacetone (DHA), erythrulose, meso-tartaric aldehyde, glutaraldehyde, glyceraldehyde, alloxan or ninhydrin, as described in European Patent Application No. 0 971 683, plant extracts, such as extracts of Pterocarpus santalinus, Pterocarpus osun, Pterocarpus soyauxii, Pterocarpus erinaceus, Pterocarpus indicus, or Baphia nitida, extracts of redwoods of the genus Pterocarpus and the genus Baphia; Agents known for their action of facilitating and / or accelerating sunburn and / or browning of human skin and / or their action of coloring human skin, such as products sold under the brand name Carrot Oil (INCI name: Daucus carrota, Helianthus annuus sunflower oil) by Provital, containing carotenoids (more specifically β-carotene and γ-carotene), carotenoids, vitamin E and vitamin K;Products known for their effect of accelerating sunburn of human skin in combination with exposure to ultraviolet light, containing tyrosine and / or its derivatives, such as tyrosine and riboflavin (vitamin B), sold under the brand name SunTan Accelerator by Provital; TM Products sold under the brand name Zymo Tan Complex by Zymo Line, containing tyrosine and tyrosinase complex, acetyl tyrosine, sold under the brand name MelanoBronze by Mibelle TM (INCI name: acetyl tyrosine, extract of Vitex agnus-castus (Monk’s pepper)), products sold under the brand name Unipertan VEG-24 / 242 / 2002 (INCI name: butylene glycol and acetyl tyrosine and hydrolyzed vegetable protein and adenosine triphosphate) by Unipex, products containing extract of Momordica seeds (i.e., loofah oil), sold under the brand name Try-Excell by Sederma TM (INCI name: oleoyl tyrosine and Luffa Cylindrica (seed oil) and oleic acid), products sold under the brand name Actibronze by Alban Muller TM (INCI name: hydrolyzed wheat protein and acetyl tyrosine and copper gluconate), products sold under the brand name Tyrostan by Synerga TM (INCI name: potassium caproyl tyrosine), products sold under the brand name Tyrosinol by Synerga (INCI name: sorbitan isostearate, glyceryl oleate, caproyl tyrosine), products sold under the brand name InstaBronze by Alban Muller TMProducts sold under [[ID=]], TM Products sold under (INCI name: Butylene Glycol, Palmitoyl Tripeptide-40), sugars and sugar derivatives, for example, TM Products sold under (INCI name: Inositol), containing oligosaccharides of marine origin (glucuronic acid and mannuronic acid chelated with magnesium and manganese ions), TM (or Phycosaccharide TM AG) (INCI name: Water and hydrolyzed algin (Laminaria digitata) and magnesium sulfate and manganese sulfate), TMProducts sold under the name (INCI name: Maltodextrin, Mucuna Pruriens Seed Extract), flavonoid-rich compounds, such as products sold under the brand name "Biotanning" by Silab (INCI name: Hydrolyzed citrus Aurantium dulcis fruit extract), which are known to be rich in lemon flavonoids (of the hesperidin type); those described in the European patent application published in European Patent Application Publication No. 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 mono- and diesters of cinnamic acid and vitamin C, and more generally, mimics of the activity of DOPAchrome tautomerase selected from those described in the European patent application published in European Patent Application Publication No. 1 515 688 A2, etc., reagents for the treatment of hair and / or body hair, such as those that protect melanocyte-forming cells in hair follicles, and reagents that protect said melanocyte-forming cells from cytotoxic agents that cause aging and / or apoptosis of said melanocyte-forming cells.

[0063] Examples of antioxidants that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include EDTA and its salts, citric acid, tartaric acid, oxalic acid, BHA (butylhydroxyanisole), BHT (butylhydroxytoluene), tocopherol derivatives such as tocopheryl acetate, Dissolvine sold by AkzoNobel under the INCI name: Tetrasodium Glutamate Diacetate TM Mixtures of antioxidant compounds such as GL 47S.

[0064] Examples of sunscreens that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include all those appearing in the amended Cosmetics Directive 76 / 768 / EEC, Annex VII.

[0065] Organic sunscreen agents that can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G) include para-aminobenzoic acid (PABA), especially the monoglycerol ester of PABA, the ethyl ester of N,N-dipropoxy 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, etc., belonging to the family of benzoic acid derivatives; N-acetylanthranilic acid homomenthyl, etc., belonging to the family of anthranilic acid derivatives; amyl salicylate, homomenthyl salicylate, ethylhexyl salicylate, phenyl salicylate, benzyl salicylate, or p-isopropylphenyl salicylate, etc., belonging to the family of salicylic acid derivatives; ethylhexyl cinnamate, 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(p-methoxycinnamate), etc., belonging to the family of cinnamic acid derivatives; 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2',4,4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4'-methylbenzophenone, 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, etc., belonging to the family of benzophenone derivatives; 3-(4'-methylbenzylidene)-d,l-camphor, 3-benzylidene-d,l-camphor, camphor benzalkonium methosulfate; urocanic acid, ethyl urocanate;Systems of sulfonic acid derivatives such as 2-phenylbenzimidazole-5-sulfonic acid and its salts; systems of triazine derivatives such as hydroxyphenyltriazine, ethylhexyl oxyhydroxyphenyl-4-methoxyphenyltriazine, 2,4,6-triani lino(p-carb-2'-ethylhexyl-1'-oxy)-1,3,5-triazine, 4,4-((6-(((1,1-dimethylethyl)amino)carbonyl)phenyl)amino)-1,3,5-triazine-2,4-diyl diimino)bis(2-ethylhexyl)ester of benzoic acid; 2-phenyl-5-methylbenzoxazole, 2,2'-hydroxy-5-methylphenylbenzotriazole, 2-(2'-hydroxy-5'-(t-octyl)phenyl)benzotriazole, 2-(2'-hydroxy-5'-methylphenyl)benzotriazole; dibenzalazine; dianisoylmethane, 4-methoxy-4''-t-butylbenzoylmethane; 5-(3,3-dimethyl-2-norbornylidene)-3-pentan-2-one; systems of diphenylacrylate derivatives such as 2-ethylhexyl 2-cyano-3,3-diphenyl-2-propenoate or ethyl 2-cyano-3,3-diphenyl-2-propenoate; or systems of polysiloxanes such as benzylidene siloxane malonate are included.;

[0066] Inorganic sunscreens, also known as "inorganic filters", which can be combined with the self-reversible inverse latex as defined above in the compositions (F) and (G), include titanium oxide, zinc oxide, cerium oxide, zirconium oxide, iron yellow, valve handle or black iron oxide, or chromium oxide. These inorganic inhibitors may or may not be micronized, may or may not be surface-treated, and may optionally be provided in the form of an aqueous or oily pre-dispersion system.;

Examples

[0067] The following examples illustrate the invention but do not limit it.;

[0068] 1 - Example 1.1 An inverse latex (LI) containing a crosslinked homopolymer of an ammonium salt of acrylic acid containing ethylenediaminedisuccinic acid in trisodium salt form as a metal ion sequestering agent 1 Preparation While stirring, charge a beaker with the following: - 250 grams of deionized water, - 250 grams of high-purity acrylic acid, - 125 grams of an aqueous ammonia solution at 30% by weight, - 0.62 grams of a commercially available solution containing 35% by weight of ethylenediaminedisuccinic acid in trisodium salt form (brand name Natriquest™ E30), - 0.139 grams of copper sulfate pentahydrate (i.e., an amount of 160 mol ppm relative to the total number of moles of acrylic acid), - 0.71 grams of triallylamine

[0069] Adjust the pH of the aqueous phase to 5.5 and make the solution up to 682 grams with deionized water.

[0070] Prepare the organic phase simultaneously: - 250 grams of isohexadecane - 15 grams of Montane TM 80 VG - 10 grams of Hypermer TM 6212 (1) (1): Hypermer TM 6212 is an oil-in-water surfactant derived from polyisobutylene succinic anhydride.

[0071] Gradually introduce the aqueous phase into the organic phase and then subject it to vigorous mechanical stirring using an Ultra-Turrax sold by IKA. Transfer the resulting emulsion to a polymerization reactor. Bubble the emulsion with nitrogen quite vigorously for 45 minutes to remove oxygen and cool the medium to a temperature of approximately 5 - 6 °C.

[0072] ​Subsequently, 0.11 g of AIBN and cumene hydroperoxide solution (0.08 g in 5 ml of isooctadecane) are introduced.

[0073] After sufficient time for good homogenization of the solution, an aqueous solution of sodium metabisulfite (0.1 g in 25 ml of water) is then added at a rate of 0.5 ml / min. During this addition, the temperature in the polymerization reactor is raised to the final polymerization temperature. The reaction medium is then maintained at this temperature for approximately 90 minutes. The entire mixture is cooled to a temperature of approximately 35 °C. 37.5 g of Montanox 80 is added to the emulsion, in the same manner as 12.5 g of Simulsol OL50.

[0074] The resulting product is referred to as (LI 1 )

[0075] 1.2 Preparation of an inverse latex containing a crosslinked homopolymer of the ammonium salt of acrylic acid containing sodium diethylenetriaminepentaacetate as a metal ion sequestering agent A solution of ethylenediaminedisuccinic acid in the trisodium salt form of 0.62 grams is replaced with a commercially available solution containing 40 wt% sodium diethylenetriaminepentaacetate sold under the brand name Versenex TM 80, and the same protocol as in Example 1.1 is carried out, except for this replacement.

[0076] The resulting product is referred to as (LI 2 )

[0077] 1.3 Preparation of an inverse latex (LI 3 ) containing a crosslinked homopolymer of the ammonium salt of acrylic acid containing glutamic acid, N,N - diacetic acid, tetrasodium salt as a metal ion sequestering agent A solution of ethylenediaminedisuccinic acid in the trisodium salt form of 1.24 grams is replaced with 0.62 grams of the brand name Dissolvine TMExcept for replacing with a commercial solution containing 47 wt% glutamic acid, N,N-diacetic acid, tetrasodium salt sold as GDA 47-S, the same protocol as in Example 1.1 is implemented.

[0078] The product is referred to as (LI 3 ).

[0079] Considering the reported low exothermicity, the reaction was not complete, so this test was not analyzed.

[0080]

Table 1

[0081] Test (LI 3 ) demonstrates a lower efficiency of glutamic acid, N,N-diacetic acid, tetrasodium salt (brand name Dissolvine TM sold as GLDA 47-S) despite its higher chelating ability (29.92 grams of Cu / 1 gram of metal ion sequestering agent [1]) than that of ethylenediaminedisuccinic acid in trisodium salt form (6.59 grams of Cu / 1 gram of metal ion sequestering agent [2]). This is because when added prior to polymerization under higher stoichiometric conditions, glutamic acid, N,N-diacetic acid, tetrasodium salt allows the initiation of the polymerization reaction but only enables an increase in exothermicity of only 17 °C, suggesting that there is no complete conversion of the monomers. This process, therefore, does not proceed in a manner similar to the processes of tests (LI 1 ) and (LI 2 ), and the resulting self-reversible inverse latex does not allow gels to be obtained in solution at 2% and 3%.

[0082] Conversely, test (LI 1 ) using ethylenediaminedisuccinic acid in trisodium salt form as a metal ion sequestering agent makes it possible to achieve a self-reversible inverse latex with thickening properties similar to that of self-reversible inverse latex (LI 2 ).

[0083] Ethylenediaminedisuccinic acid in its trisodium salt form can, therefore, be considered as an alternative to sodium diethylenetriaminepentaacetate for preparing a thickening self-reversible inverse latex containing a chlorinated acrylic acid homopolymer.

[0084] [1]: “Product Data Sheet” NOURYON, DISSOLVINE GL-47-S July 3, 2019 [2]: Technical data sheet NatrIquest, INEOS, “Issue 3 / 2008”. [3]: “Technical data sheet; Versenex TM 80”, Dow, “Form No. 113-01342-0812 AMS”, issued in “August 2012”.

[0085] II: Exemplary cosmetic formulations In the following formulations, the percentages are expressed as weight percentages per 100% of the weight of the formulation.

[0086] Example II-1: Care cream Cyclomethicone: 10% Self-reversible inverse latex (LI 1 ): 0.8% Montanov TM 68: 2% Stearyl alcohol: 1% Stearic alcohol: 0.5% Preservative: 0.65% Lysine: 0.025% Xanthan gum: 0.2% Glycerin: 3% Water: appropriate amount to 100%

[0087] Example II-2: Sun milk Formulation A Montanov TM 68: 3.0% Sesame oil: 5.0% ParsolTM MCX: 5.0% Carrageenan λ: 0.10% B water: appropriate amount to 100% C Self-reversible inverse latex (LI 1 ): 0.80% D Fragrance: appropriate amount Preservative: appropriate amount Procedure Emulsify B in A at 60°C, then add C at approximately 60°C, then add D at approximately 30°C, and adjust the pH if necessary.

[0088] Example II-3: Body Milk Montanov TM 202: 3.5% Lanol TM 37T: 8.0% Solagum TM L: 0.05% Water: appropriate amount to 100% Benzophenone-3: 2.0% Dimethicone 350 cPs: 0.05% Self-reversible inverse latex (LI 1 ): 2.5% Preservative: 0.2% Fragrance: 0.4%

[0089] Example II-4: Remove makeup - emulsion containing sweet almond oil Montanov TM 202: 5% Sweet almond oil: 5% Water: appropriate amount to 100% Self-reversible inverse latex (LI 1 ): 0.3% Glycerin: 5% Preservative: 0.2% Fragrance: 0.3%

[0090] Example II-5: Moisturizing cream for oily skin Montanov TM 68: 5% Cetyl stearyl octanoate: 8% Octyl palmitate: 2% Water: appropriate amount to 100% Self-reversible inverse latex (LI 1 ): 2.6% Micropearl TM M100: 3.0% Mucopolysaccharide: 5% Sepicide TM HB: 0.8% Fragrance: 0.3%

[0091] Example II-6: Removing makeup - milk Montanov TM 68: 3% Primol TM 352: 8.0% Sweet almond oil: 2% Water: appropriate amount to 100% Self-reversible inverse latex (LI 1 ): 0.8% Preservative: 0.2%

[0092] Example II-7: Sun milk Montanov TM L: 3.5% Lanol TM 37T: 10.0% Parsol TM MCX: 5.0% Eusolex TM 4360: 2.0% Water: appropriate amount to 100% Self-reversible inverse latex (LI 1 ): 1.8% Preservative: 0.2% Fragrance: 0.4%

[0093] Example II-8: Sunscreen emulsion Lanol TM 99: 15% Montanov TM 68: 3.0% Parsol TM MCX: 3.0% Water: appropriate amount for 100% Dihydroxyacetone: 5.0% Sodium dihydrogen phosphate: 0.2% Self-reversible inverse latex (LI 1 ): 2.5% Fragrance: 0.3% Sepicide TM HB: 0.8% Sodium hydroxide: appropriate amount for pH = 5

[0094] Example II-9: Care Cream Cyclomethicone: 10% Self-reversible inverse latex (LI 1 ): 2.8% Montanov TM 202: 4.5% Preservative: 0.65% Lysine: 0.025% Xanthan gum: 0.2% Glycerin: 3% Water: appropriate amount for 100%

[0095] Example II-10: Anti-Sun Cream Simulsol TM 165: 3% Montanov TM 68: 2% C12 - C15 benzoate: 8% Pecosil TM PS 100: 2% Dimethicone: 2% Cyclomethicone: 5% Octyl para-methoxycinnamate: 6% Benzophenone-3: 4% Titanium dioxide: 8% Xanthan gum: 0.2% Butylene glycol: 5% Demineralized water: appropriate amount for 100% Self-reversible inverse latex (LI 1 ): 1.5% Preservative, fragrance: appropriate amount

[0096] Example II-11: Self-tanning Gel Montanov TM 68: 3.0% Glyceryl triheptanoate: 10.0% Deepaline TM PVB: 1.05% Self-reversible inverse latex (LI 1 ): 2.2% Water: appropriate amount to 100% Dihydroxyacetone: 5% Fragrance: 0.1% Sepicide TM HB: 0.3% 30 Sepicide TM CI: 0.1% Parsol TM MCX: 4.0%

Claims

1. a) at least one monomer selected from acrylic acid and methacrylic acid, wherein at least one monomer unit is derived from a monomer in which the carboxylic acid functional group of the monomer is in a free acid form, a partially chlorinated form or a fully chlorinated form; and - a crosslinked anionic polyelectrolyte (P) consisting of at least one monomer unit derived from a polyethylene crosslinked monomer (AR), b) ethylenediaminedisuccinic acid in the trisodium salt form comprising an aqueous phase, wherein the polyethylene crosslinked monomer (AR) is triallylamine, a self-reversible inverse latex.

2. The inverse latex according to claim 1, characterized in that the aqueous phase contains at least 0.01 mol% of ethylenediaminedisuccinic acid in the trisodium salt form.

3. The inverse latex according to claim 1 or 2, characterized in that it contains 10% to 90% by weight of the crosslinked anionic polyelectrolyte (P).

4. The following steps: a) preparing an aqueous phase comprising at least one monomer selected from acrylic acid and methacrylic acid, wherein at least one monomer unit is derived from a monomer in which the carboxylic acid functional group of the monomer is in a free acid form, a partially chlorinated form or a fully chlorinated form, at least one monomer derived from the polyethylene crosslinked monomer (AR), and ethylenediaminedisuccinic acid in the trisodium salt form; and b) preparing an organic phase comprising at least one oil and a water-in-oil emulsifier system (S １ ) c) mixing the aqueous phase prepared in steps a) and b) with the organic phase to form an emulsion; d) inactivating the emulsion with nitrogen; e) initiating a polymerization reaction by introducing a free radical initiator into the emulsion inactivated in step d); f) A step of introducing an oil-in-water type emulsifying surfactant system (S ２ ) at a temperature of 30°C to 60°C into the reaction medium resulting from step e) comprising The method for preparing an inverse latex according to claim 1 or 2, wherein the polyethylene crosslinked monomer (AR) is triallylamine.

5. In step e), the free radical initiator is a redox pair that generates bisulfite (HSO ２ S ２ O ５ -) ions, such as cumene hydroperoxide / sodium metabisulfite (Na ２ ), or cumene hydroperoxide / thionyl chloride (SOCl ３ ). The method according to claim 4, characterized in that it is a redox pair that generates bisulfite (HSO ２ S ２ O ５ -) ions, such as cumene hydroperoxide / sodium metabisulfite (Na ２ ), or cumene hydroperoxide / thionyl chloride (SOCl ３ ).

6. The method according to claim 4 or 5, characterized in that in step e), a polymerization co-initiator is introduced into the emulsion inactivated in step d).

7. The method according to any one of claims 4 to 6, characterized in that in step a), the pH of the aqueous phase is adjusted to 3.0 to 7.

0.

8. The method according to any one of claims 4 to 7, characterized in that the reaction medium originating from step e) is concentrated by distillation before carrying out step f). **Claim 9** The method according to any one of claims 4 to 8, characterized in that the reaction medium originating from step e) or f) is sprayed. **Claim 10** Use of the inverse latex according to any one of claims 1 to 3 as a thickener and / or emulsifier and / or stabilizer for topical cosmetic compositions. **Claim 11** Topical cosmetic composition (F), characterized in that it contains, as a thickener, 0.1% to 10% by weight of the inverse latex according to any one of claims 1 to 3 per 100% of its total weight. **Claim 12** Topical pharmaceutical composition (G), characterized in that it contains, as a thickener, 0.1% to 10% by weight of the inverse latex according to any one of claims 1 to 3 per 100% of its total weight.

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