WO2008087326A2

WO2008087326A2 - Novel powder polymer containing a surface-active monomer, preparation method thereof and use of same as a thickening agent

Info

Publication number: WO2008087326A2
Application number: PCT/FR2007/052564
Authority: WO
Inventors: Olivier Braun; Paul Mallo
Original assignee: Societe D'exploitation De Produits Pour Les Industries Chimiques Seppic
Priority date: 2006-12-27
Filing date: 2007-12-19
Publication date: 2008-07-24
Also published as: FR2910899B1; FR2910899A1; WO2008087326A3

Abstract

The invention relates to an anionic polyelectrolyte, a linear, branched or crosslinked terpolymer of at least one monomer having a partially- or totally-salified free strong acid function with at least one neutral monomer selected from among N,N-dimethyl acrylamide and 2-hydroxyethyl acrylate, and at least one monomer having formula (I), wherein R1 represents a hydrogen atom, R represents a linear or branched alkyl radical comprising between eight and 16 carbon atoms and n represents a number greater than or equal to one and less than or equal to 10. The invention also relates to the preparation method thereof and to the use of same in cosmetics.

Description

New polymer powder with a surfactant monomer, process for its preparation and use as a thickener

The invention relates to new thickening agents and their use in cosmetics and pharmacy. The cosmetic industry and the pharmaceutical industry very regularly use synthetic thickening polymers to increase the viscosity of creams, emulsions and various topical solutions. The synthetic thickening polymers currently used in these fields come in two physical forms, the powder form and the liquid form for which the polymer is dispersed in an oil using surfactants and which is commonly called inverse latex. .

Thickening polymers in the form of powder, the best known are polymers based on acrylic acid or copolymers based on acrylic acid and its esters. For example, polymers marketed by Noveon under the brand name CARBOPOL ™ and PEMULEN ™. They are described in particular in US Patents 5,373,044, US 2,798,053 and in European Patent EP 0 301 532.

In cosmetics, homopolymers or copolymers based on 2-acrylamido-2-methylpropanesulphonic acid are also used and still in powder form. These thickening polymers are sold under the brand name Aristoflex ™ and described in particular in European patents EP 816 403, EP 1 116 733 and EP 1 069 142.

European Patent Application EP 1 426 436 discloses whitening compositions comprising, as thickener, an amphiphilic polymer obtained by polymerization of 2-acrylamido-2-methyl propanesulfonic acid, partially or totally salified, with at least one polyethylene hydrophobic hydrophobic comonomer. alkoxylated and at least one unsaturated vinyl monomer;

International application WO 2006/002936 discloses polymers comprising sulfonic functional monomeric units as a water retention agent and their use in applications for paints, cements and plasters. These thickeners in the form of powder are obtained by precipitating polymerization; the monomer (s) is (or are) dissolved in an organic solvent such as benzene, ethyl acetate, cyclohexane or tert-butanol; this process therefore requires many successive purification steps of the final product, to remove any trace of residual solvent.

The cosmetic industry also very largely uses thickeners in the form of inverse latexes and especially those marketed by the applicant. For example, Sepigel ™ 305, Simulgel ™ 600, Simulgel ™ EG, Simulgel ™ EPG, Simulgel ™ NS, Simulgel ™ A, Sepiplus ™ 400, Sepiplus ™ 250 and Sepiplus ™ 265 thickeners are obtained. inverse emulsion. They have the advantage of being more easily manipulated and disperse very quickly in water. In addition, these products develop remarkably high thickening performance; these performances are probably the consequence of the process for their preparation, a polymerization reaction in dispersed phase, which leads to polymers of very high molecular weight.

Nevertheless, these thickeners in the form of inverse latex contain an oil and one or more surfactants which can sometimes induce cutaneous intolerance reactions on particularly sensitive subjects; moreover this presence of oil makes them unusable for the preparation of clear gels. The inventors have therefore developed thickeners having the thickening performance equivalent to or greater than inverse latex, but better tolerated by the skin, in particular due to the absence of any oil phase that can lead to clearer gels. These products are in the form of powder but have dissolution times, and therefore ease of implementation, comparable to those of liquid products. These compounds, described in the European patent application published under the number EP 1 496 081, are obtained by conventional polymerization techniques, dispersed phase polymerization, inverse suspension polymerization, inverse emulsion or inverse microemulsion; the thickening systems obtained are then extracted and purified by various techniques such as the precipitation in a third solvent, the precipitation in a third solvent optionally followed by a washing, a drying by atomization or by azeotropic dehydration, optionally followed by washing with a carefully chosen solvent.

These thickeners therefore combine some of the advantages of conventional powder thickeners (absence of oil, obtaining lighter gels) and the advantages of thickeners in the form of inverse latex (high speed dissolution in oil remarkable thickening and stabilizing power) . However, for certain uses, customers who use such thickening systems wish to be able to produce even lighter gels than those obtained today, see transparent gels. In addition, the gels obtained with these thickeners do not have a satisfactory stability when the composition is rich in electrolytes as is often the case for compositions comprising sunscreens.

The inventors have therefore sought to develop new thickening systems which do not have the drawbacks mentioned above and which have sufficient thickening properties so that they are an acceptable alternative to the compositions of the state of the art, and which in particular in the case of self-tanning compositions, do not react with dihydroxacetone (DHA).

Therefore, the invention firstly relates to an anionic polyelectrolyte linear terpolymer connected or crosslinked with at least one monomer having a strong acid function, free, partially salified or totally salified, with at least one neutral monomer selected among N, N-dimethyl acrylamide and 2-hydroxyethyl acrylate, and at least one monomer of formula (I):

(I) wherein R1 represents a hydrogen atom, R represents a linear or branched alkyl radical having from eight to sixteen carbon atoms and n represents a number greater than or equal to one and less than or equal to ten. The term "connected polymer" denotes a nonlinear polymer which has pendant chains so as to obtain, when this polymer is dissolved in water, a high state of entanglement leading to viscosities with a low rate of gradient, very important. The term "crosslinked polymer" denotes a non-linear polymer which is in the form of a three-dimensional network that is insoluble in water but swellable with water and thus leads to the production of a chemical gel.

The composition according to the invention may comprise crosslinked units and / or branched patterns. The strong acid function of the monomer containing it is in particular the sulphonic acid function or the phosphonic acid function, said acid functions being free, partially salified or totally salified. Said monomer may be for example free, partially salified or fully salified styrenesulphonic acid, free, partially salified or completely salified ethylsulphonic acid or 2-methyl-2- [(1-oxo-2-propenyl) amino] acid Free 1-propanesulfonic, partially salified or totally salified.

In the context of the present invention, the anionic polyelectrolyte as defined above more particularly comprises between 5 mol% and 95 mol% of strong acid functional monomers, more particularly between 10 mol% and 90 mol% and particularly preferably between 25 mol%. and 80 mol%.

According to one particular embodiment, the subject of the invention is an anionic polyelectrolyte as defined above, in which the strong acid functional monomer is 2-methyl-2 - [(1-oxo-2-propenyl) amino] 1-propanesulfonic acid. free, partially salified or totally salified partially or totally salified. In the context of the present invention, when the strong acid function is partially or totally salified, it is in particular either an alkali metal salt such as for example the sodium salt or the potassium salt, or an ammonium salt, the salt of an amino alcohol such as, for example, the monoethanolamine salt or the salt of an amino acid such as, for example, the lysine salt. In the context of the present invention, the anionic polyelectrolyte as defined above more particularly comprises between 4.9 mol% and 90 mol% of monomer neutral, more particularly between 9.5 mol% and 85 mol% and especially between 19.5 mol% and 75 mol%.

In the formula (I) as defined above, by linear or branched alkyl radical comprising from eight to sixteen carbon atoms, is denoted more particularly for R, or a radical derived from linear primary alcohols such as, for example, the octyl radical. decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl or hexadecyl; or a radical derived from Guerbet alcohols, which are branched 1-alkanols corresponding to the general formula:

CH ₃ - (CH ₂ ) _{P -} CH [CH ₃ - (CH ₂ ) _P. ₂ ] -CH ₂ OH, in which p represents an integer between 2 and 6, such as, for example, 2-ethylhexyl, 2-propylheptyl, 2-butyloctyl, 2-pentylnonyl or 2- hexyl decyl; or a radical derived from isoalkanols corresponding to the general formula:

CH ₃ -CH (CH ₃ ) - (CH ₂ ) _m -CH ₂ OH, in which m represents an integer between 2 and 12 such as, for example, 4-methyl pentyl, 5-methyl hexyl, 6 -methyl heptyl, 15-methyl pendadecyl or 16-methyl heptadecyl, ie the 2-hexyl octyl radical

According to one particular embodiment, the subject of the invention is an anionic polyelectrolyte as defined above, for which, in formula (I), R represents an alkyl radical comprising from 12 to carbon atoms. According to another particular embodiment, the subject of the invention is an anionic polyelectrolyte as defined above, for which in formula (I), n represents an integer between 3 and 5.

According to a very particular embodiment, the subject of the invention is an anionic polyelectrolyte as defined above, in which the monomer of formula (I) is tetraethoxylated lauryl acrylate.

In the context of the present invention, the anionic polyelectrolyte as defined above comprises between 0.1 mol% and 10 mol% of monomers of formula (I) and more particularly between 0.5 mol% and 5 mol%.

According to another particular embodiment, the anionic polyelectrolyte is crosslinked and / or connected with a diethylenic or polyethylenic compound in the molar proportion, expressed relative to the monomers used, of 0.005% to 1%, and preferably from 0.01% to 0.5% and more particularly from 0.01% to 0.25%, preferably that for which the crosslinking agent and / or the branching agent is chosen from dimethacrylate; ethylene glycol, diallyloxacetic acid or a salt thereof such as sodium diallyloxyacetate, tetraallyloxyethane, ethylene glycol diacrylate, diallyl urea, triallyl amine, trimethylol propanetriacrylate or methylenebis (acrylamide) or a mixture of its compound.

The polyelectrolyte which is the subject of the present invention may also comprise various additives, such as complexing agents, transfer agents or chain-limiting agents. The subject of the invention is more particularly an anionic polyelectrolyte chosen from the following polymers:

Partially salified 2-methyl-2 - [(1-oxo-2-propenyl) amino] -propanesulfonic acid terpolymer in the form of an alkali metal salt or an ammonium salt, 2-hydroxyethyl acrylate and acrylate tetraethoxylated lauryl, crosslinked with methylenebis (acrylamide);

Partially salified 2-methyl-2 - [(1-oxo-2-propenyl) amino] -propanesulfonic acid terpolymer in the form of an alkali metal salt or ammonium salt, N, N-dimethylacrylamide and lauryl acrylate tetraethoxylated, crosslinked with methylenebis (acrylamide); The subject of the invention is also a method for preparing the polectrolyte as defined above, characterized in that: a) all the monomers, the crosslinking agent and / or the other additives are mixed in a solvent organic, preferably tert-butanol, b) - the polymerization reaction is initiated by introducing into the dispersion prepared in step a), a free radical initiator, and then allowed to proceed, c) when the polymerization is complete, the precipitate is collected by evaporation of the solvent and then d) the precipitate is dried. According to a preferred implementation of the process, as defined above, the polymerization reaction is initiated at a temperature equal to or greater than 50 ^° C. using a radical initiator producing radicals by homolysis, such as dilauroyl peroxide, azobis-butyronitrile or azo derivatives.

According to another implementation of the process, as defined above, the polymerization reaction is initiated by a redox oxy couple, at a temperature of less than or equal to 20 ^° C., and then conducted in a quasi-adiabatic manner.

The subject of the invention is also the use of the anionic polyelectrolyte as defined above, as thickener and / or as stabilizer and / or emulsifier, of a topical cosmetic, dermopharmaceutical or pharmaceutical composition.

A topical composition according to the invention, intended to be applied to the skin or mucous membranes of humans or animals, may consist of a topical emulsion comprising at least one aqueous phase and at least one oil phase. This topical emulsion can be of the oil-in-water (O / W), water-in-oil (W / O), oil-in-water-in-oil (W / O / H) or water-in-water type. oil-in-water (E / H / E). The oil phase of the topical emulsion can consist of a mixture of one or more oils. A topical composition according to the invention may be intended for cosmetic use or be used to prepare a medicament for the treatment of diseases of the skin, scalp and mucous membranes. In the latter case, the topical composition then comprises an active ingredient which may for example consist of an anti-inflammatory agent, a muscle relaxant, an antifungal, an antibacterial or anti-dandruff.

When the topical composition is used as a cosmetic composition intended to be applied to the skin, the scalp or the mucous membranes, it may or may not comprise an active ingredient, for example a moisturizing agent, a tanning agent, a sunscreen, an anti-wrinkle, a slimming agent, an antiradical agent, an anti-acne agent, an antifungal or antidandruff.

A topical composition according to the invention usually comprises between 0.1% and 10% by weight of the thickening agent defined above and more particularly between 1% and 5% by weight. The pH of the topical composition is preferably greater than or equal to 3. The topical composition may further comprise compounds conventionally included in this type of composition, for example perfumes, preservatives, dyes, pigments, sunscreens, active ingredients, emollients or surfactants.

According to a particular aspect of the present invention, the subject of the present invention is a topical cosmetic composition for protection against the effects of the sun comprising between 0.5% and 5% by weight of at least one solar filter and between 0.1% by weight. % and 10% by weight of the polyelectrolyte as defined above.

According to another particular aspect, the invention relates to the use of the anionic polyelectrolyte as defined above, for thickening and emulsifying and stabilizing a topical composition comprising at least one aqueous phase. The anionic polyelectrolyte according to the invention is an interesting substitute for the inverse latex sold under the names SEPIGEL ™ 305, SEPIGEL ™ 501, SIMULGEL ™ EG, SIMULGEL ™ EPG, SIMULGEL ™ NS, SIMULGEL ™ 600, SIMULGEL ™ A, SEPIPLUS ™ 265, SEPIPLUS ™ 250, SEPIPLUS ™ 400 or SEPINO V ™ EMT 10 by the applicant, because it also has good compatibility with other excipients used for the preparation of formulations such as milks, lotions, creams, soaps, baths, balms, shampoos or conditioners. It can also be implemented with said SEPIGEL ™ or SIMULGEL ™, SEPIPLUS ™ and / or SEPINO V ™ EMT 10.

It is especially compatible with the concentrates described and claimed in the international publications WO 92/06778, WO 95/04592, WO 95/13863, WO 96/37285, WO 98/22207, WO 98/47610 or in FR 2 734 496, with the surfactants described in WO 93/08204.

It is particularly compatible with MONT ANO V ™ 68, MONT ANO V ™ 82, MONTANOV ™ 202, MONTANOV ™ L, MONTANOV ™ S, FLUIDANOV ™ 2OX or EASYNOV ™. It can also be used in emulsions of the type of those described and claimed in EP 0 629 396 and in cosmetically or physiologically acceptable aqueous dispersions with a chosen organopolysiloxane compound, for example from those described in WO 93/05762 or in WO 93 / 21316.

It can also be used to form aqueous gels at cosmetically or physiologically acceptable acidic pH, such as those described in WO 93/07856; it can also be used in combination with non-celluloses ionic gels, for example forming styling gels such as those described in EP 0 684 024, or in combination with fatty acid esters and sugar, to form compositions for the treatment of hair or skin such that those described in EP 0 603 019, or in shampoos or conditioners as described and claimed in WO 92/21316 or finally in combination with an anionic homopolymer such as CARBOPOL ™ to form hair treatment products such as those described in DE 19523596.

The polyelectrolyte according to the invention is also compatible with the active principles such as, for example, self-broning agents such as dihydroxyacetone (DHA), erythrulose or anti-acne agents; it can therefore be introduced into self-brominating compositions such as those claimed in EP 0 715 845, EP 0 604

249, EP 0 576 188 or in WO 93/07902.

According to one particular aspect of the present invention, the subject of the present invention is a topical self-tanning cosmetic composition comprising between 0.5% and 5% by weight of dihydroxy acetone as a self-tanning active agent and between 0.1% and 10% by weight of the polyelectrolyte such as than previously defined.

It is also compatible with N-acylated amino acid derivatives, which allows its use in soothing compositions, especially for sensitive skin, such as those described or claimed in WO 92/21318, WO 94/27561 or WO 98/09611.

It is also compatible with thickening and / or gelling polymers such as hydrocolloids of vegetable or biosynthetic origin, for example xanthan gum, karaya gum, carrageenates, alginates, galactomannans; like silicates; like cellulose and its derivatives; as starch and its hydrophilic derivatives; like polyurethanes.

The following examples illustrate the invention without limiting it. A) Preparation of the terpolymer of ammonium 2-methyl 2 - [(1-oxo-2-propenyl) aminol-propanesulfonate, N, N-dimethyl acrylamide and tetraethoxylated lauryl acrylate, (AMPS / DMAM / AL 4OE , 79/20/1) crosslinked with trimethylol propanetriacrylate (TMPTA).

Charge in a reactor maintained at 25 ° C, with stirring: 592 g of a solution of the salt of ammonia of 2-methyl 2 - [(1-oxo-2-propenyl) amino] 1-propanesulfonic acid at 15.5% in a tert-butanol / water mixture (97 , 5 / 2.5 VW)

10.1 g of N, N-dimethylacrylamide - 4.1 g of lauryl acrylate tetraethoxylated,

0.75 g of trimethylol propanetriacrylate

After a time sufficient to reach a good homogenization of the solution, it is deoxygenated by sparging with nitrogen and the temperature of the medium is raised to 70 ^° C. When the desired temperature is reached, 0.42 g of dilauroyl peroxide are added. The polymerization starts instantly. The reaction medium is then maintained for approximately 60 minutes at this temperature, then heated to 80 ^° C. This temperature is maintained 2 hours before cooling. The powder which has formed during polymerization is filtered and dried to obtain the desired product, hereinafter referred to as polyelectrolyte 1.

B) Properties of the polyelectrolyte 1.

The properties demonstrated for the compositions according to the invention are recorded in the following table where they are put in perspective with control polyelectrolytes Tl and T2, Tl being the homopolymer of 2-methyl 2 - [(1-oxo 2 propenyl) amino] 1-propanesulfonate of ammonium crosslinked with trimethylol propanetriacrylate and T2 the copolymer of ammonium 2-methyl 2 - [(1-oxo-2-propenyl) amino] -propanesulfonate and N, N-dimethyl (AMPS / DMA / 80/20), crosslinked with trimethylol propanetriacrylate;

Brookfield RVT Viscometer These results demonstrate that the polyelectrolytes which are the subject of the present invention induce compositions which are more stable to salts, thanks to the presence within their breast of the monomer of formula (I).

C) Examples of Formulations Prepared with Polyelectrolyte 1 According to the Invention

Example 1: Care cream

Cyclomethicone: 10%

Polyelectrolyte 1: 0.8% MONT ANO V ™ 68: 2%

Stearyl alcohol: 1%

Stearyl alcohol: 0.5%

Conservative: 0.65%

Lysine: 0.025% EDTA (disodium salt): 0.05%

Xanthan gum: 0.2%

Glycerin: 3%

Water: q.s. 100%

Example 2: Aftershave balm

FORMULA

A Polyelectrolyte 1: 1.5%

Water: q.s. 100%

B MICROPEARL ™ M 100: 5.0% SEPICIDE ™ CI: 0.50%

Perfume: 0.20%

Ethanol 95 °: 10.0%

OPERATIVE MODE

Add B to A.

Example 3 Satin Emulsion for the Body FORMULA

A SIMULSOL ™ 165: 5.0%

LANOL ™ 1688: 8.50%

Shea butter: 2% Paraffin oil: 6.5%

LANOL ™ 14 M: 3%

LANOL ™ S: 0.6%

B Water: 66.2%

C MICROPEARL ™ M 100: 5% D Polyelectrolyte 1: 3%

E SEPICIDE ™ CI: 0.3%

SEPICIDE ™ HB: 0.5%

AQUAXYL ™: 3%

Perfume: 0.20% Vitamin E acetate: 0.20%

Pyrolidinonecarboxylate sodium: 1%

OPERATIVE MODE

Add C to B, emulsify B in A at 70 ^° C., then add D at 60 ^° C. and then E at 30 ^° C.

Example 4: O / W Cream

FORMULA

A SIMULSOL ™ 165: 5.0%

LANOL ™ 1688: 20.0%

LANOL ™ P: 1.0% B Water: q.s. 100%

C Polyelectrolyte 1: 2.50%

D SEPICIDE ™ CI: 0.20%

SEPICIDE ™ HB: 0.30%

PROCEDURE Introduce B in A to 75 ° C; add C to 60 ⁰ C, then D to 45 ° C. Example 5: Non-fat solar gel

FORMULA

A Polyelectrolyte 1: 3.00%

Water: 30% B SEPICIDE ™ CI: 0.20%

SEPICIDE ™ HB: 0.30%

Perfume: 0.10%

C Colorant: q.s.

Water: 30% MICROPEARL ™ M 100: 3.00%

Water: q.s.p 100%

E Silicone oil: 2.0%

PARSOL ™ MCX: 5.00% OPERATIVE MODE Introduce B into A; add C, then D, then E.

Example 6: Solar milk

FORMULA

A MONTANOV ™ S: 3.0% Sesame oil: 5.0%

PARSOL ™ MCX: 5.0%

Carrageenan λ: 0.10%

B Water: q.s. 100%

C Polyelectrolyte 1: 0.80% D Perfume: q.s.

Curator: q.s.

OPERATIVE MODE

Emulsify B in A at 75 ° C then add C to 60 ⁰ C, then D to 30 ⁰ C and adjust the pH if necessary.

Example 7: Massage Gel FORMULA

A Polyelectrolyte 1: 3.5%

Water: 20.0%

B Color: 2 drops / 100g Water: q.s.

Ethanol: 10%

Menthol: 0.10%

D Silicone oil: 5.0% PROCEDURE Add B to A, then add to mix, C then D

Example 8: Moisturizing and mattifying foundation

FORMULA

A water: 20.0% Butylene glycol: 4.0%

PEG-400: 4.0%

PECOSIL ™ PS100: 1.0%

Sodium hydroxide: q.s. pH = 9

Titanium dioxide: 7.0% Talc: 2.0%

Yellow iron oxide: 0.8%

Red iron oxide: 0.3%

Black iron oxide: 0.05%

B LANOL ™ 99: 8% Caprylic capric triglyceride 8%

MONT ANO V ™ 202: 5.00% C water: q.s. 100%

MICROPEARL ™ M305: 2.0%

Tetrasodium EDTA: 0.05% D Cyclomethicone: 4.0%

Xanthan gum: 0.2% Polyelectrolyte 1: 0.8%

E SEPICIDE ™ HB: 0.5%

SEPICIDE CI: 03%

Perfume: 0.2% OPERATIVE MODE

Prepare at 80 ^° C., the mixtures B + D and A + C, then mix and emulsify the assembly.

Example 9: Radiance Gel

A Polyelectrolyte 1: 4% Water: 30%

B ELASTINE HPM: 5.0%

C MICROPEARL ™ M 100: 3%

Water: 5%

D SEPICIDE ™ CI: 0.2% SEPICIDE ™ HB: 0.3%

Perfume: 0.06%

Pyrolidinon sodium carboxylate 50%: 1% Water: q. s. p. 100% PROCEDURE Prepare A; add B, then C, then D.

Example 10: Body Milk

MONTANOV ™ S: 3.5%

LANOL ™ 37T: 8.0% SOLAGUM ™ L: 0.05% Water: q.s. 100%

Benzophenone-3: 2.0%

Dimethicone 35OcPs: 0.05%

Polyelectrolyte 1: 0.8% Preservative: 0.2%

Perfume: 0.4% EXAMPLE 11 Cleansing Emulsion with Sweet Almond Oil

MONTANOV ™ 68: 5%

Sweet almond oil: 5% Water: q.s. 100%

Polyelectrolyte 1: 0.3%

Glycerin: 5%

Conservative: 0.2%

Perfume: 0.3%

Example 12: moisturizing cream for oily skin

MONTANOV ™ 68: 5%

Cetylstearyloctanoate: 8%

Octyl palmitate: 2% Water: q.s. 100%

Polyelectrolyte 1: 0.6%

MICROPEARL ™ M 100: 3.0%

Mucopolysaccharides: 5%

SEPICIDE ™ HB: 0.8% Perfume: 0.3%

Example 13: After-shave balm soothing without alcohol

LIP ACIDE ™ PVB: 1.0%

LANOL ™ 99: 2.0% Sweet almond oil: 0.5%

Polyelectrolyte 1: 3.5%

Water: q.s. 100%

Perfume: 0.4%

SEPICIDE ™ HB: 0.4% SEPICIDE ™ CI: 0.2% Example 14: AHA cream for sensitive skin

Mixture of N-lauryl amino acids: 0.1% to 5%

Aspartate magnesium and potassium: 0.002% to 0.5%

LANOL ™ 99: 2%

MONTANO V ™ 68: 5.0%

Water: q.s. 100%

Polyelectrolyte 1: 1.50%

Gluconic acid: 1.50%

Triethanolamine (TEA): 0.9%

SEPICIDE ™ HB: 0.3%

SEPICIDE ™ CI: 0.2%

Perfume: 0.4%

EXAMPLE 15 Soothing Care After Sun Mixture of N-Lauryl Amino Acids: 0.1% to 5%

Aspartate magnesium and potassium: 0.002% to 0.5%

LANOL ™ 99: 10.0%

Water: q.s. 100%

Polyelectrolyte 1: 2.50% SEPICIDE ™ HB: 0.3%

SEPICIDE ™ CI: 0.2%

Perfume: 0.4%

Color: 0.03%

Example 16: Cleansing Milk

MONTANOV ™ S: 3% PRIMOL ™ 352: 8.0% Sweet almond oil: 2% Water: qs 100% Polyelectrolyte 1: 0.8% Preservative: 0.2% EXAMPLE 17 Fluid Emulsion with Alkaline pH

MARCOL ™ 82: 5.0%

Sodium hydroxide: 10.0% Water: q.s. 100%

Polyelectrolyte 1: 1.5%

Example 18: Fluid foundation

SIMULSOL ™ 165: 5.0% LANOL ™ 84D: 8.0%

LANOL ™ 99: 5.0%

Water: q.s. 100%

Mineral pigments and fillers: 10.0%

Polyelectrolyte 1: 1.2% Preservative: 0.2%

Perfume: 0.4%

Example 19: Solar milk

MONTANOV ™ S: 3.5% LANOL ™ 37T: 10.0%

PARSOL ™ MCX: 5.0%

EUSOLEX ™ 4360: 2.0%

Water: q.s. 100%

Polyelectrolyte 1: 1.8% Preservative: 0.2%

Perfume: 0.4%

Example 20: Contour Freeze

Polyelectrolyte 1: 2.0% Perfume: 0.06%

Pyrrolidinonecarboxylate sodium: 0.2% DOW CORNING ™ 245 FMd 2.0%

Water: q. s. p. 100%

Example 21: Care composition not rinsed

Polyelectrolyte 1: 1.5%

Perfume: q. s

Conservative: q. s.

DOW CORNING ™ X2 8360: 5.0%

DOW CORNING ™ Q2 1401: 15.0%

Water: q.s. 100%

Example 22: Slimming gel

Polyelectrolyte 1: 5%

Ethanol: 30%

Menthol: 0.1%

Caffeine: 2.5%

Ruscus extract: 2%

Ivy extract: 2%

SEPICIDE ™ HB: 1%

Water: q. s. p. 100%

Example 23: Ultra-natural tinted cream gel

FORMULA

A water: 10.0%

Butylene glycol: 4.0%

PEG-400: 4.0%

PECOSIL ™ PS100: 1.5%

NaOH: q.s. pH = 7

Titanium dioxide: 2.0%

Yellow iron oxide: 0.8%

Red iron oxide: 0.3% Black iron oxide: 0.05%

B LANOL ™ 99: 4.0%

Caprylic capric triglyceride 4.0%

SEPIFEEL ™ ONE: 1.0% Polyelectrolyte 1: 3.0%

C Water: q.s. 100%

MICROPEARL ™ M305: 2.0%

Tetrasodium EDTA: 0.05%

Cyclomethicone: 4.0% D SEPICIDE ™ HB: 0.5%

SEPICIDE CI: 03%

Fragrance: 0,2% PROCEDURE prepare the mixture B + C then add A then D.

Example 24: Care for oily skin

MICROPEARL ™ M310: 1, 0%

Polyelectrolyte 1: 5.0%

Octyl Isononanoate: 4.0% Water: q.s. 100%

SEPICONTROL ™ A5: 4.0%

Perfume: 0.1%

SEPICIDE ™ HB: 0.3%

SEPICIDE ™ CI: 0.2% CAPIGEL ™ 98: 0.5%

Water: 10%

Example 25: Cream with AHA

MONT ANO V ™ 68: 5.0% LIP ACID ™ PVB: 1.05%

LANOL ™ 99: 10.0% water: qs 100% Gluconic acid: 1.5%

TEA (triethanolamine): 0.9%

Polyelectrolyte 1: 1.5% Perfume: 0.4%

SEPICIDE ™ HB: 0.2%

SEPICIDE ™ CI: 0.4%

Example 26: Non-greasy tanning for face and body LANOL ™ 2681: 3.0%

Polyelectrolyte 1: 2.5%

Water: q.s. 100% Dihydroxyacetone: 3.0%

Fragrance: 0.2% SEPICIDE ™ HB: 0.8%

Sodium hydroxide): q.s. pH = 5

Example 27: Solar milk with Tahiti monoï

Monoï de Tahiti: 10% LIP ACIDE ™ PVB: 0.5%

Polyelectrolyte 1: 2.2%

Water: q.s. 100%

Perfume: 0.1%

SEPICIDE ™ HB: 0.3% SEPICIDE ™ CI: 0.1%

PARSOL ™ MCX: 4.0%

Example 28: Sun care for the face

Cyclomethicone and Dimethiconol: 4.0% Polyelectrolyte 1: 3.5%

Water: qsp 100% Perfume: 0.1%

SEPICIDE ™ HB: 0.3%

SEPICIDE ™ CI: 0.21%

PARSOL ™ MCX: 5.0%

Micatitane: 2.0%

Lactic acid: q.s. pH = 6.5

Example 29: Bronzing emulsion without sun

LANOL ™ 99: 15%

MONTANO V ™ 68: 5.0%

PARSOL ™ MCX: 3.0%

Water: q.s. 100%

Dihydroxyacetone: 5.0%

Monosodium phosphate: 0.2%

Polyelectrolyte 1: 0.5%

Perfume: 0.3%

SEPICIDE ™ HB: 0.8%

Sodium hydroxide: q.s. pH = 5.

Example 30: Care Cream

Cyclomethicone: 10%

Polyelectrolyte 1: 0.8%

MONTANO V ™ 68: 4.5%

Conservative: 0.65%

Lysine: 0.025%

EDTA (disodium salt): 0.05%

Xanthan gum: 0.2%

Glycerin: 3%

Water: qsp 100%

Example 31: Care cream Cyclomethicone: 10%

Polyelectrolyte 1: 0.8%

MONTANOV ™ 68: 4.5%

Perfluoropolymethylisopropylether: 0.5% Preservative: 0.65%

Lysine: 0.025%

EDTA (disodium salt): 0.05%

PEMULEN ™ TR1: 0.2%

Glycerin: 3% Water: qs 100%

Example 32: Body Milk

FORMULA

SIMULSOL ™ 165: 5.0% LANOL ™ 1688: 12.0%

LANOL ™ 14 M: 2.0%

Cetyl alcohol: 0.3%

SCHERCEMOL ™ OP: 3%

B Water: q.s. 100%

C Polyelectrolyte 1: 0.35%

D SEPICIDE ™ CI: 0.2% SEPICIDE ™ HB: 0.5%

Perfume: 0.20% OPERATIVE MODE Emulsify B in A towards 75 ° C; add C to 60 ⁰ C, then D to 30 ⁰ C

Example 33: Gel care massage

FORMULA A Polyelectrolyte 1: 3.00%

Water: 30%

B SEPICIDE ™ CI: 0.20%

SEPICIDE ™ HB: 0.30%

Perfume: 0.05%

C Colorant: q.s.

Water: q.s. 100%

D MICROPEARL ™ SQL 5.0%

LANOL ™ 1688: 2%

PROCEDURE Prepare A; add B, then C, then D.

Example 34: Body Milk

FORMULA

MONTANOV ™ S: 3.0% Glycerol triheptonate: 10.0%

B Water: q.s. 100%

C Polyelectrolyte 1: 1.0%

D Perfume: q.s.

Curator: q.s.

OPERATIVE MODE

Melt A at about 75 ° C. Emulsify B in A at 75 ° C. and then add C at 60 ^° C. and then D. Example 35: Soothing after-shave balm without alcohol

Mixture of lauryl amino acids: 0.1% to 5%

Aspartate magnesium and potassium: 0.002% to 0.5%

LANOL ™ 99: 2%

Sweet almond oil: 0.5%

Water: q.s. 100%

Polyelectrolyte 1: 3%

SEPICIDE ™ HB: 0.3%

SEPICIDE ™ CI: 0.2%

Perfume: 0.4%

Example 36: Body Milk

MONTANOV ™ S: 3.5%

LANOL ™ 37T: 8.0%

SOLAGUM ™ L: 0.05%

Water: q.s. 100%

Benzophenone-3: 2.0%

Dimethicone 350 cPs: 0.05%

Polyelectrolyte 1: 0.8%

Conservative: 0.2%

Perfume: 0.4%

Example 37: Soothing after-shave balm without alcohol

LIP ACIDE ™ PVB: 1.0% LANOL ™ 99: 2.0%

Sweet almond oil: 0.5%

Polyelectrolyte 1: 3.5%

Water: q.s. 100%

Fragrance: 0.4% SEPICIDE ™ HB: 0.4%

SEPICIDE ^™ CI: 0.2% Example 38: Aftershave Refreshing Gel

LIP ACIDE ™ PVB: 0.5%

LANOL ™ 99: 5.0% Polyelectrolyte 1: 2.5%

Water: q.s. 100%

MICROPEARL ™ LM: 0.5%

Perfume: 0.2%

SEPICIDE ™ HB: 0.3% SEPICIDE ™ CI: 0.2%

Example 39: Cream with AHA

MONT ANO V ™ 68: 5.0%

LIP ACIDE ™ PVB: 1.05% LANOL ™ 99: 10.0% Water: q.s. 100%

Gluconic acid: 1.5%

TEA (triethanolamine): 0.9%

Polyelectrolyte 1: 1.5% Perfume: 0.4%

SEPICIDE ™ HB: 0.2%

SEPICIDE ™ CI: 0.4%

EXAMPLE 40 Gloss Gel Polyelectrolyte 1: 1.5%

Volatile silicone: 25%

Monopropylene glycol: 25%

Demineralized water: 10% Glycerin: qs 100%

Example 41: Slimming gel Polyelectrolyte 1: 1.5%

Isononyl isononanoate: 2%

Caffeine: 5%

Ethanol: 40%

MICROPEARL ™ LM: 2%

Demineralized water: qsp 100%

Preservative perfume: qs

Example 42: Cleansing milk

SIMULSOL ™ 165: 4%

MONT ANO V ™ 202: 1%

Caprylate-caprate triglyceride: 15%

PECOSIL ™ DCT: 1%

Demineralized water: qs

CAPIGEL ™ 98: 0.5%

Polyelectrolyte I: 1%

PROTEOL ™ APL: 2%

Sodium hydroxide: qsp pH = 7

Example 43: Restructuring "rinse off" cream mask for stressed and weakened hair

KETROL ™ T: 0.5%

PECOSIL ™ SPP50: 0, 75%

N-cocoyl amino acids: 0.70% Butylene glycol: 3.0%

Polyelectrolyte I: 3.0%

MONT ANO V ™ 82: 3.0%

Jojoba oil: 1.0%

LANOL ™ P: 6.0% AMONYL ™ DM: 1.0%

LANOL ™ 99: 5.0% SEPICIDE ™ HB: 0.3% SEPICIDE ™ CI: 0.2% Perfume: 0.2% Water: qs 100%

Example 44: Sunscreen

SIMULSOL ™ 165: 3%

MONT ANO V ™ 202: 2%

Benzoate C 12-Cl 5: 8%

PECOSIL ™ PS 100: 2%

Dimethicone: 2%

Cyclomethicone: 5%

Octyl para-methoxy cinnamate: 6%

Benzophenone-3: 4%

Titanium oxide: 8%

Xanthan gum: 0.2%

Butylene glycol: 5%

Demineralized water: qsp 100%

Polyelectrolyte 1: 1.5%

Conservative, perfume: qs

EXAMPLE 45 Mixed Skin Care Gel

Polyelectrolyte 1: 4%

Vegetal squalane: 5%

Dimethicone: 1.5%

SEPICONTROL ™ A5: 4%

Xanthan gum: 0.3%

Water: qsp 100%

Conservative, Fragrance: qs.

Example 46: Hair Lotion

Butylene glycol: 3.0% Polyelectrolyte 1: 3%

SIMULSOL ™ 1293: 3.0%

Lactic acid: qs pH = 6

SEPICIDE ™ HB: 0.2% SEPICIDE ™ CI: 0.3%

Perfume: 0.3%

Water: qs 100%

Example 47: Protective and relaxing shampoo Amonyl ™ 675 SB: 5.0%

Sodium lauryl ether sulfate 28%: 35.0%

Polyelectrolyte 1: 3.0%

SEPICIDE ™ HB: 0.5%

SEPICIDE ™ CI: 0.3% Sodium hydroxide: q.s. pH = 7.2

Perfume: 0.3%

Dye (FDC blue 1 / yellow 5): q.s.

Water: 100% QSP

Example 48: "leave-on" protector; Anti-stress hair care

KETROL ™ T: 0.5%

Mixture of cocoyl amino acids: 3.0%

Butylene glycol: 5.0%

DC 1501: 5.0% Polyelectrolyte 1: 4.0%

SEPICIDE ™ HB: 0.5%

SEPICIDE ™ CI: 0.3%

Perfume: 0.3%

Water: QSP 100 Example 49: Vitamin Cream

SIMULSOL ™ 165: 5% MONTANO V ™ 202: 1% Caprylic / Capric Triglycerides: 20% Vitamin A Palmitate: 0.2% Vitamin E Acetate: 1% MICROPEARL ™ M 305: 1.5% Polyelectrolyte 1: 2% Water qs 100% Preservative, perfume qs

Example 50: Solar gel

Polyelectrolyte 1: 3.00%

SEPICIDE ™ CI: 0.20% SEPICIDE ™ HB: 0.30%

Perfume: 0.10% coloring: qs silica: 3.00%

Water: q.s.p 100% Silicone oil: 2.0%

Benzophenone-3: 5.00%

Example 51: Lip Gloss

Polyelectrolyte 1: 1.50% Schercemol ™ TISC: 15.00% Vistanol ™ NPGC: 15.00% Candurin Paprika: 0.50% MONTANOX ™ 80: 1.00% Antaron ™ V216: 0.90% Apricot Aroma: 0 , 20% SEPICIDE ™ HB: 0,50% C Maltidex ™ H 16322: qsp 100%

Example 52: Sun Earth Pressed Powder

Polyelectrolyte 1: 2.00% Lanol ™ 99: 12.00%

SEPIWHITE ™ MSH: 1.00%

Talc: 33.00%

MICROPEARL ™ M310: 3.00%

Yellow iron oxide: 0.80% Red iron oxide: 0.30%

Black iron oxide: 0.05%

Mica: qs 100%

Example 53: Emulsion for skins with atopic tendency ARLACEL ™ P135: 2.00%

Polyelectrolyte 1: 1.00%

Lanol ™ 1688: 14.00%

Primol ™ 352: 8.00%

Glycerin: 5.00% Water: qs 100%

Magnesium sulphate: 0.70%

SEPICIDE ™ HB: 0.30%

SEPICIDE ™ CI: 0.20%

MICROPEARL ™ M310: 5.00%

Example 54: Soothing sun care (water in silicone)

Polyelectrolyte 1: 2.00%

DC5225C: 20.00%

DC345: 10.00% SEPICALM ™ VG: 3.00%

Titanium Dioxide MT100T: 5.00% Zinc oxide Z rating HPl 5.00% SEPICIDE ™ HB: 0.30% Perfume: 0.05%

SEPICIDE ™ CI: 0.20% Glycerine: 5.00% Sodium chloride: 2.00% Water: qs 100%

Example 55: Multi-phase care Polyelectrolyte 1: 3.00%

C 12-15 alkylbenzoate: 25.00%

AQUAXYL ™: 3.00%

SEPITONIC ™ M3: 1.00%

SEPICIDE ™ HB: 0.50% SEPICIDE ™ CI: 0.30%

Example 56: Self-tanning gel

Polyelectrolyte 1: 5.0%

Ethanol: 30%

Dihydroxyacetone: 5%

Menthol: 0.1%

Caffeine: 2.5%

Ivry extract: 2%

SEPICIDE ™ HB: 1%

Water: qsp 100%

Example 57: Solar gel and self-tanning

MONTANOV ™ S: 3.0% Glyceryl triheptanoate: 10.0% LIP ACIDE ™ PVB: 1.05% Polyelectrolyte 1: 1.2% Water: qs 100%

Dihydroxyacetone: 5%

Perfume: 0.1%

SEPICIDE ™ HB: 0.3% SEPICIDE ™ CI: 0.1%

PARSOL ™ MCX: 4.0%

Example 58: Self-bronzing cream with α-hydroxy acids

MONT ANO V ™ 68: 5.0% LIP ACID ™ PVB: 1.05%

Lanol ™ 99: 10.0%

Water: qs 100%

Gluconic acid: 1.5%

Dihydroxyacetone: 3% Triethanolamine: 0.9%

Polyelectrolyte 1: 1.5%

Perfume: 0.4%

SEPICIDE ™ HB: 0.2%

SEPICIDE ™ CI: 0.4%

Example 59: Self-bronzing cream with α-hydroxy acids for sensitive skin

Mixture of N-lauroyl amino acids: 0.1% to 5%

Aspartate magnesium and potassium: 0.002% to 0.5%

MONT ANO V ™ 68: 5.0% Lanol ™ 99: 2.0%

Water: qs 100%

Lactic acid: 1.5%

Dihydroxyacetone: 3.5%

Triethanolamine: 0.9% Polyelectrolyte 1: 1.5%

Perfume: 0.4% SEPICIDE ™ HB: 0.3%

SEPICIDE ™ CI: 0.2%

Example 60: Silicone self-tanning moisturizing emulsion SIMULSOL ™ 165: 5.0%

Lanol ™ 1688: 8.5%

Galam butter: 2%

Liquid paraffin: 6.5%

Lanol ™ 14M: 3% Lanol ™ S: 0.6%

Water: 66.2%

Dihydroxyacetone: 3%

Micropearl ™ M 100: 5%

Polyelectrolyte 1: 3% AQUAXYL ™: 5%

Vitamin E acetate: 0.20%

Pyrolidinon sodium carboxylate: 0.20%

Perfume: 0.2%

SEPICIDE ™ HB: 0.5% SEPICIDE ™ CI: 0.3%

The definitions of the commercial products used in the examples are as follows:

SIMULSOL ™ 1293 is hydrogenated and ethoxylated castor oil, with an ethoxylation index equal to 40, sold by the company SEPPIC.

CAPIGEL ™ 98 is a liquid thickener based on acrylate copolymer sold by the company SEPPIC.

KETROL ™ T is xanthan gum marketed by the company KELCO.

LANOL ™ 99 is isononyl isononanoate sold by the company SEPPIC. DC 1501 is a mixture of cyclopentasiloxane and dimethiconol marketed by Dow Chemical. MONTANOV ™ 82 is an emulsifier based on cetearyl alcohol and cocoylglucoside.

Montanov ^™ 68 (cetearyl glucoside) is a self-emulsifiable composition as described in WO 92/06778, sold by the company SEPPIC. MICROPEARL ^™ M 100 is an ultra-fine powder with a very soft feel and mattifying action marketed by the company MATSUMO

SEPICIDE ™ CI, imidazolidine urea, is a preservative marketed by the company SEPPIC.

PEMULEN ™ TRl is an acrylic polymer marketed by GOODRICH. SIMULSOL ™ 165 is self-emulsifiable glycerol stearate marketed by the company SEPPIC.

LANOL ™ 1688 is a non-fat emollient ester marketed by the company

SEPPIC.

LANOL ™ 14M and LANOL ™ S are consistency factors marketed by the company SEPPIC.

SEPICIDE ™ HB, which is a mixture of phenoxyethanol, methylparaben, ethylparaben, propylparaben and butylparaben, is a preservative marketed by the company SEPPIC.

AQUAXYL ™ is a moisturizing agent marketed by the company SEPPIC. SCHERCEMOL ™ OP is a non-greasy emollient ester.

LANOL ™ P is a stabilizing additive marketed by the company SEPPIC.

PARSOL ™ MCX is octyl para-methoxy cinnamate; marketed by GIVAUDAN.

MONTANOV ™ S is a pearlescent agent, marketed by the company SEPPIC, based on a mixture of alkyl polyglucosides such as those described in WO 95/13863.

MICROPEARL ™ SQL is a mixture of micro particles containing squalane which is released by the action of massage; it is marketed by MATSUMO.

LANOL ™ 37T is glycerol triheptanoate, marketed by the company

SEPPIC. SOLAGUM ™ L is a carrageenan marketed by the company SEPPIC.

MARCOL ™ 82 is a paraffin oil marketed by the company EXXON. LANOL ™ 84D is dioctyl malate marketed by the company SEPPIC.

PARSOL ™ NOX is a sunscreen marketed by the company GIVAUDAN. EUSOLEX ™ 4360 is a sunscreen marketed by MERCK.

DOW CORNING ™ 245 Fluid is cyclomethicone sold by the company Dow Corning.

LIP ACIDE ™ PVB is a hydrolyzate of acylated wheat proteins marketed by the company SEPPIC.

MICROPEARL ™ LM is a mixture of squalane, polymethylmethacrylate and menthol, marketed by the company SEPPIC. SEPICONTROL ™ A5 is a capryloyl glycine, sarcosine, cinnamon zylanicum extract sold by the company SEPPIC, such as those described in the international patent application PCT / FR98 / 01313 filed June 23, 1998.

LANOL ™ 2681 is a caprylate mixture, copra caprate, marketed by the company SEPPIC. MONTANO V ™ 202, is an APG / fatty alcohol composition as described in

WO 98/47610, sold by the company SEPPIC.

PROTEOL ™ APL is a foaming surfactant marketed by the company

SEPPIC

SCHERCEMOL ™ TISC is an ester (tri-isostearyl citrate) marketed by SCHER.

VISTANOL ™ NPGC is an ester (neopentyl glycol dicaprate) marketed by the company SEWA KASEI.

ANTARON ™ V216 is a synthetic polymer (PVP / hexadecene copolymer) distributed by UNIVAR. C MALTIDEX ™ H 16322 is polyol (maltitol syrup) marketed by the company

Cerestar.

SEPIWHITE ™ MSH is a depigmenting active ingredient (N-undecylenoyl phenylalanine) sold by the company SEPPIC.

DC 345 is a cyclomethicone marketed by Dow Corning. DC 5225C is a mixture of cyclopentasiloxane and dimethicone copolyol marketed by the company Dow Corning. SEPICALM ™ VG is a soothing active ingredient (sodium palmitoylproline) marketed by the company SEPPIC.

MTlOOVT is a micronized titanium dioxide that has undergone a surface treatment

(aluminum hydroxide / stearic acid) distributed by UNIPEX. Z COTE HP1 is a micronized zinc oxide having undergone a surface treatment distributed by GATTEFOSSE.

CANDURTN PAPRIKA is a mixture of potassium silicate and aluminum and iron oxide.

The MICROPEARL ™ M 310 is an ultra-fine powder with a very soft feel and mattifying action marketed by MATSUMO.

PRIMOL ™ 352 is a mineral oil marketed by the company EXXON.

PECOSIL ™ DCT is sodium Dimethicone PEG-7 Acetyl Methyltaurate marketed by the company PHOENIX.

PECOSIL ™ PS 100 is Dimethicone PEG-7 marketed by the company PHOENIX.

Claims

Anionic polyelectrolyte, linear terpolymer, connected or crosslinked with at least one monomer having a strong, free, partially salified or totally salified acidic function, with at least one neutral monomer chosen from N, N-dimethyl acrylamide and acrylate of 2-hydroxyethyl, and at least one monomer of formula (I):

(I) wherein R1 represents a hydrogen atom, R represents a linear or branched alkyl radical having from eight to sixteen carbon atoms and n represents a number greater than or equal to one and less than or equal to ten.

2. Anionic polyelectrolyte as defined in claim 1, wherein the strong acid functional monomer is free 2-methyl 2 - [(1-oxo-2-propenyl) amino] -propanesulfonic acid, partially salified or fully salified partially or totally salified.

3. Anionic polyelectrolyte as defined in one of claims 1 or 2, wherein in the formula (I), R represents an alkyl radical having from 12 to 13 carbon atoms.

4. Anionic polyelectrolyte as defined in one of claims 1 to 3, wherein in the formula (I), n represents an integer between 3 and 5.

5. Anionic polyelectrolyte as defined in one of claims 1 to 4, wherein the monomer of formula (I) is tetraethoxylated lauryl acrylate.

6. Anionic polyelectrolyte as defined in one of claims 1 to 5, characterized in that it is crosslinked and / or connected with a diethylenic or polyethylenic compound chosen from ethylene glycol dimethacrylate, diallyloxacetic acid or one of its salts such as sodium diallyloxyacetate, ethylene glycol diacrylate, diallyl urea, triallyl amine, trimethylol propanetriacrylate or methylenebis (acrylamide) or a mixture of its compounds.

7. anionic polyelectrolyte chosen from the following polymers:

Partially salified 2-methyl-2 - [(1-oxo-2-propenyl) amino] -propanesulfonic acid terpolymer in the form of an alkali metal salt or ammonium salt, N, N-dimethylacrylamide and lauryl acrylate tetraethoxylated, crosslinked with methylenebis (acrylamide).

8. Process for the preparation of the polyelectrolyte as defined in one of claims 1 to 7, characterized in that: a) - all the monomers, if necessary the crosslinking agent and / or the other additives are mixed in an organic solvent, preferably tert-butanol, b) - initiating the polymerization reaction by introducing into the dispersion prepared in step a), a free radical initiator, and then allowing it to proceed, c) when the polymerization is complete, the precipitate is collected by evaporation of the solvent, then d) the precipitate is dried.

9. Use of the anionic polyelectrolyte as defined in one of claims 1 to 7, as a thickener and / or as an emulsifier and / or as a stabilizer, a topical composition cosmetic, dermopharmaceutical or pharmaceutical.

10. Use of the anionic polyelectrolyte as defined in one of claims 1 to 7, as a thickener and / or as an emulsifier and / or as a stabilizer, a topical composition comprising at least one aqueous phase.

11. A topical cosmetic composition characterized in that it comprises 0.1% and 10% by weight of the polyelectrolyte as defined in one of claims 1 to 7.

12. Composition as defined in claim 11 comprising between 0.5% and 5% by weight of at least one sunscreen and between 0.1% and 10% by mass of the polyelectrolyte as defined in one of claims 1. at 7.

13. The composition as defined in claim 11 comprising between 0.5% and 5% by weight of dihydroxy acetone as a self-tanning active agent and between 0.1% and 10% by weight of the polyelectrolyte as defined in one of claims 1 to 7. .