WO2014023675A1

WO2014023675A1 - Cosmetic composition comprising at least one particular fixing polymer and at least one particular thickening polymer

Info

Publication number: WO2014023675A1
Application number: PCT/EP2013/066347
Authority: WO
Inventors: Mélanie BELLET; Virginie Masse; Cécile Bebot
Original assignee: L'oreal
Priority date: 2012-08-07
Filing date: 2013-08-05
Publication date: 2014-02-13
Also published as: FR2994388B1; FR2994388A1

Abstract

Cosmetic composition comprising at least one particular fixing polymer and at least one particular thickening polymer The present invention relates to a cosmetic composition for treating keratin fibres, in particular human keratin fibres such as the hair, comprising, in a cosmetically acceptable medium, one or more particular fixing polymers and one or more thickening polymers obtained from the polymerization of a mixture of monomers comprising vinylpyrrolidone, vinylimidazole, 3-methyl-1-vinylimidazolium chloride and methacrylic acid. The present invention also relates to a cosmetic process for treating keratin fibres, comprising the use of the said composition, and also to the use of the said composition for styling.

Description

Cosmetic composition comprising at least one particular fixing polymer and at least one particular thickening polymer

The present invention relates to a cosmetic composition for treating keratin fibres, in particular human keratin fibres such as the hair, comprising, in a cosmetically acceptable medium, one or more particular fixing polymers and one or more thickening polymers obtained from vinylpyrro lidone, vinylimidazole, 3 -methyl- l - vinylimidazolium chloride and methacrylic acid.

The invention also relates to a cosmetic process for treating keratin fibres, especially a process for fixing and/or shaping keratin fibres, using the abovementioned composition.

Finally, the invention relates to a use of the said composition for cosmetic hair treatment, and in particular for styling fibres, i. e. shaping and/or fixing the hairstyle.

In the field of hair styling, in particular among products intended for shaping and/or ho lding the hairstyle, the hair compositions that are the most common on the cosmetics market are compositions consisting essentially o f a so lution, which is usually alcoho lic or aqueous-alcoho lic, and o f one or more polymers, known as fixing po lymers, which are generally film-forming polymers. The function o f these polymers is thus to produce welds between the hairs so as to be able to fix the hairstyle in the desired shape . These fixing polymers are usually formulated as a mixture with various cosmetic adjuvants such as thickening polymers, which are generally anionic or nonionic.

Styling products may be in the form o f gels, sera or foams that are generally applied to wet hair. To shape and fix the hairstyle, blow- drying or drying is then performed.

Moreover, styling products must especially be able to spread over a head o f hair without giving a tacky or dragging sensation during application. However, styling products usually have the drawback of spreading poorly on a head o f hair and of forming a dry, crumbly film, which, on the one hand, gives the hair a cosmetically unsatisfactory coarse feel, and, on the other hand, gives rise to the formation o f unsightly residues.

There is thus a real need to propose cosmetic compositions for treating the hair, especially for styling the hair, which spread well over the head of hair and make it possible to minimize, or even eliminate, the formation o f unsightly residues on the hair, and which give improved cosmetic properties while at the same time providing a good level o f fixing, so as to obtain satisfactory shaping and/or hold of the hairstyle.

The Applicant has discovered, surprisingly, that it is possible to achieve the desired properties by combining one or more particular fixing po lymers as described below with one or more thickening polymers obtained from a mixture of monomers comprising vinylpyrro lidone, vinylimidazole, 3 -methyl- 1 -imidazo lium chloride and methacrylic acid.

Specifically, the combination defined above makes it possible to minimize the crumbliness of the product deposited on the head o f hair.

The composition according to the invention also makes it possible to improve the cosmetic properties o f the hair, especially by improving its capacity for disentangling and by giving it a soft, smooth feel, and also its cleanliness due to the removal of the unsightly residues.

The composition according to the invention also makes it possible conveniently to fix the hair, thus leading to satisfactory shaping and/or hold of the hairstyle.

As a result, the cosmetic composition leads to good working properties, good fixing properties and also good conditioning properties .

One subj ect of the present invention is thus especially a cosmetic composition for treating keratin fibres, in particular human keratin fibres such as the hair, comprising, in a cosmetically acceptable medium:

(i) one or more fixing polymers comprising one or more units corresponding to formula (I) below :

in which:

Ri represents a hydrogen atom or a methyl group,

R₂ and R₃ represent, independently of each other, a hydrogen atom or a linear or branched, in particular linear, C 1 - C4 alkyl radical, n denotes 0 or 1 ,

Z denotes a group -COO-(CH₂)_m- m denotes an integer ranging from 1 to 4; and

(ii) one or more optionally salified thickening polymers comprising units derived from vinylpyrrolidone, vinylimidazole, 3-methyl- 1 -vinylimidazolium chloride and methacrylic acid.

The cosmetic composition is preferably a composition for styling and conditioning keratin fibres, in particular for styling keratin fibres, in particular human keratin fibres such as the hair.

Another subj ect of the present invention consists especially o f the use o f the cosmetic composition according to the invention for styling keratin fibres.

The invention also relates to a process for the cosmetic treatment of keratin fibres, especially for fixing and/or shaping keratin fibres, using the cosmetic composition as defined above.

Other subj ects, characteristics, aspects and advantages of the invention will emerge even more clearly on reading the description and the examples that follow. For the purposes of the present invention, the term " fixing polymer" means any polymer that makes it possible to give a shape to a head o f hair or to hold the hair in a given shape.

The fixing po lymer may be cationic, i. e. it may comprise cationic groups, especially nitrogen atoms in cationic form. According to a first embodiment, Ri represents a hydrogen atom.

According to this embodiment, R₂ and R₃ preferably represent a hydrogen atom.

Still according to this embodiment, n is preferably an integer equal to 0.

Preferentially, in formula (I) of the fixing polymers according to the invention, Ri represents a hydrogen atom, R₂ and R₃ represent a hydrogen atom and n is an integer equal to 0.

In other words, the fixing polymers according to the present invention may be chosen especially from polymers comprising in their structure one or more units derived from vinylamine.

The fixing po lymers comprising one or more units corresponding to formula (I) used in the composition according to the invention may also comprise one or more units derived from vinylformamide.

According to a particular embodiment, the fixing polymer(s) comprising one or more units corresponding to formula (I) are chosen from copolymers comprising in their structure :

(a) one or more units corresponding to formula (A) below:

— CH^— CH—

(A)

(b) one or more units corresponding to formula (B) below :

CH— CH—

NH— C-H

O

(B) In other words, the fixing polymers according to the invention may be chosen from copolymers comprising one or more units derived from vinylamine and one or more units derived from vinylformamide.

Preferably, the vinylamine/vinylformamide fixing copolymers according to the invention are chosen from copolymers comprising, in their structure, from 5 mol% to 100 mol% of units corresponding to formula (A) and from 0 to 95 mol% of units corresponding to formula (B), more preferentially from 10 mol% to 100 mol% of units corresponding to formula (A) and from 0 to 90 mol% of units corresponding to formula (B).

The copolymers may be obtained, for example, by partial hydrolysis of polyvinylformamide. This hydrolysis may be performed in an acidic or basic medium.

According to a preferred embodiment, the fixing polymer(s) comprising one or more units corresponding to formula (I) are copolymers consisting solely of units of formula (A) and units of formula (B).

The weight-average molecular mass of the copolymer, measured by light scattering, may range from 1000 to 30000000 g/mol, preferably from 1000 to 1 000000 g/mol and more particularly from 1000 to 500000 g/mol.

The cationic charge density of the vinylformamide/vinylformamide copolymer may range from 2 meq/g to 20 meq/g, preferably from 2.5 to 15 meq/g and more particularly from 3.5 to 10 meq/g.

The fixing copolymer(s) comprising units of formula (A) and optionally units of formula (B) are sold under the name Lupamin by the company BASF, for instance, and in a non-limiting manner, the products sold under the names Lupamin 9095, Lupamin 5095, Lupamin 1095, Lupamin 9030 and Lupamin 9010.

According to a second embodiment, Ri represents a methyl group.

According to this embodiment, R₂ and R₃ preferably represent a methyl group. Still according to this embo diment, n is preferably an integer equal to 1 and m is preferably an integer equal to 2.

In other words , the fixing po lymers according to the present invention may be chosen especially from polymers comprising in their structure one or more units derived from dimethylaminoethyl methacrylate .

Preferably, in this embo diment, these units o f formula (I) are combined with at least vinylpyrrolidone units .

Such polymers are, for example, the Copolymer 845 products so ld by the company I SP .

Preferably, Ri represents a methyl group .

The fixing po lymer(s) comprising one or more units o f formula (I) may be present in the cosmetic composition according to the invention in a content ranging from 0.05 % to 20% by weight, preferably in a content ranging from 0. 1 % to 1 0% by weight and more preferentially in a content ranging from 0.2% to 5 % by weight relative to the total weight of the composition.

For the purposes of the present invention, the term "thickener" means any compound whose presence increases the visco sity o f the composition into which it is introduced by at least 25 cps and preferably 50 cps at 25 ° C and at a shear rate of 1 s^{" 1} .

The thickening polymer(s) used in the co smetic compo sitio n according to the invention are chosen from copolymers comprising in their structure units derived from vinylpyrrolidone, vinylimidazole , 3 -methyl- 1 -vinylimidazolium chloride and methacrylic acid.

In other words , the copolymers are obtained after polymerization o f a mixture of monomers comprising vinylpyrro lidone , vinylimidazole, 3 -methyl- 1 -vinylimidazolium chloride and methacrylic acid.

The thickening polymers according to the invention may be crosslinked.

The thickening polymers according to the invention may be salified. The counterions may be chosen from ions derived from alkali metals or alkaline-earth metals, ammonium ions or ions derived from organic amines.

The thickening polymer used in the cosmetic composition is especially Polyquaternium-86 so ld under the name Luvigel Advanced by the company BASF .

The thickening polymer(s) comprising in their structure units derived from vinylpyrro lidone, vinylimidazo le, 3 -methyl- l - vinylimidazolium chloride and methacrylic acid may be present in the cosmetic composition in a content ranging from 0.05 % to 20% by weight, preferably in a content ranging from 0. 1 % to 10% by weight and more preferentially in a content ranging from 0.2% to 5 % by weight relative to the total weight of the cosmetic composition.

Preferably, the weight ratio between the total amount of thickening polymer(s) comprising in their structure units derived from vinylpyrro lidone, vinylimidazole, 3 -methyl- 1 -vinylimidazolium chloride and methacrylic acid, on the one hand, and the total amount of cationic fixing po lymer(s) comprising units of formula (I) preferably ranges from 0. 1 to 10 and more preferentially from 0.5 to 1 .5.

Preferably, the composition comprises water and/or one or more organic solvents preferably chosen from C 1 - C4 lower alcohols, such as ethanol, isopropanol, tert-butanol or n-butano l; po lyo ls such as propylene glycol; polyo l ethers, C 5 - C 10 alkanes, C3 - C4 ketones such as acetone and methyl ethyl ketone; C 1 - C4 alkyl acetates such as methyl acetate, ethyl acetate and butyl acetate; dimethoxyethane, diethoxyethane; and mixtures thereof.

The cosmetic composition may also comprise one or more non- silicone fatty substances .

The term "fatty substance" means an organic compound that is inso luble in water at ordinary room temperature (25 °C) and at atmospheric pressure (760 mmHg), with a so lubility in water of less than 5 %, preferably than 1 % and even more preferentially than 0. 1 % . The non-silicone fatty substances generally have in their structure a hydrocarbon-based chain comprising at least 6 carbon atoms . In addition, the fatty substances are generally soluble in organic solvents under the same temperature and pressure conditions, for instance chloroform, ethanol, benzene, liquid petroleum j elly or decamet hy Icy clop entasiloxane .

The non-silicone fatty substance(s) of the invention are, moreover, non-polyoxyethylenated and non-polyglycerolated.

The term "non-silicone fatty substance" means a fatty substance of which the structure does not comprise more than one silicon atom.

The fatty substance(s) may be liquid or non-liquid at room temperature and at atmospheric pressure . The liquid fatty substances of the invention preferably have a visco sity o f less than or equal to 2 Pa. s, better still of less than or equal to 1 Pa. s and even better still of less than or equal to 0. 1 Pa. s, at a temperature of 25 °C and a shear rate of 1 s^{" 1} .

Preferably, the non-silicone fatty substance(s) that may be used in the cosmetic composition according to the invention are liquid at room temperature and at atmospheric pressure.

Preferentially, the fatty substance(s) that may be used in the cosmetic composition according to the invention are chosen from hydrocarbons, in particular linear or branched C₆ - C i 6 alkanes and linear or branched hydrocarbons, of mineral, animal or synthetic origin, of more than 16 carbon atoms, such as paraffin oils, and derivatives thereo f, petroleum j elly, liquid petroleum j elly; fatty acid esters, in particular oils o f plant origin and esters of C4 - C22 dicarboxylic or tricarboxylic acids and of C 1 - C22 alcoho ls, these esters being more preferentially chosen from triglycerides of plant origin; liquid fatty alcoho ls, and mixtures thereof.

More preferentially, the non-silicone fatty substance(s) are chosen from liquid petroleum j elly, isoparaffins, isododecane, undecane, tridecane, avocado oil, olive oil, camellia oil, apricot kernel oil, 1 ,3 -propanedio l dicaprylate, and mixtures thereo f. Even more preferentially, the non-silicone fatty substance(s) are chosen from avocado oil and liquid petroleum j elly, and mixtures thereo f.

The fatty substance(s) may be present in the cosmetic composition according to the invention in a content ranging from 0.001 % to 30% by weight and preferably in a content ranging from 0. 1 % to 20% by weight, relative to the total weight of the cosmetic composition.

The cosmetic composition may optionally comprise one or more surfactants, which may be chosen from anionic, cationic, nonionic, amphoteric and zwitterionic surfactants, and mixtures thereo f.

Preferably, the additional surfactant(s) are chosen from nonionic surfactants .

The nonionic surfactants that may be used in the compositions of the present invention are compounds that are well known per se (see in particular in this respect the Handbook of Surfactants by M.R. Porter, published by Blackie & Son (Glasgow and London), 1991 , pp . 1 16- 178) . They are especially chosen from polyethoxylated, polypropoxylated or polyglycerolated alcoho ls and fatty alcoho ls, polyethoxylated, polypropoxylated or polyglycerolated a-dio ls or polyethoxylated, polypropoxylated or polyglycerolated (d_ 2 o)alkylphenols, the fatty chain comprising, for example, from 8 to 1 8 carbon atoms, it being possible for the number of ethylene oxide or propylene oxide groups to range in particular from 1 to 100 and for the number of glycerol groups to range in particular from 1 to 30.

Mention may also be made o f condensates of ethylene oxide and o f propylene oxide with fatty alcohols; polyethoxylated fatty amides preferably having from 1 to 100 ethylene oxide units, polyglycerolated fatty amides comprising on average from 1 to 5 , and in particular from 1 .5 to 4 glycero l groups, ethoxylated fatty acid esters of sorbitan having from 1 to 50 ethylene oxide units, fatty acid esters of sucrose, fatty acid esters of polyethylene glyco l, alkyl polyglycosides, polyethoxylated plant oils preferably containing from 1 to 1 00 ethylene oxide units, N-(C₆ -24 alkyl)glucamine derivatives or amine oxides, such as (C _{1 0 - 1 4} alkyl)amine oxides or N-(C _{1 0- 1 4} acyl)aminopropylmorpholine oxides .

The surfactant(s) may be present in the cosmetic composition according to the invention in a content ranging from 0.01 % to 30% by weight and preferably in a content ranging from 0. 1 % to 20% by weight relative to the total weight of the composition.

The cosmetic composition according to the invention may also comprise one or more additional thickeners other than the compounds i) and ii), which may be selected from natural or synthetic, anionic, amphoteric, zwitterionic, nonionic or cationic and associative or non- associative po lymeric thickeners, and non-polymeric thickeners, for instance an electrolyte.

Examples o f po lymeric thickeners that may be mentioned include cellulo se-based thickeners, for example hydroxyethylcellulose, hydroxypropylcellulose and carboxymethylcellulose, guar gum and derivatives thereo f, for examp le hydroxypropyl guar, so ld by Rhodia under the reference Jaguar HP 105 , gums of microbial origin, such as xanthan gum and scleroglucan gum, synthetic po lymeric thickeners, such as crosslinked homopolymers of acrylic acid or of acrylamidopropanesulfonic acid, for example Carbomer, or nonionic, anionic or amphoteric associative po lymers, such as the po lymers so ld under the names Pemulen TR 1 or TR2 by Goodrich, Salcare SC90 by Allied Co lloids, Aculyn 22, 28 , 33 , 44 or 46 by Rohm & Haas and Elfacos T210 and T212 by Akzo .

The additional thickener(s) may be present in the cosmetic composition according to the invention in a content ranging from 0.01 % to 20% by weight and preferably in a content ranging from 0. 1 % to 10% by weight relative to the total weight of the composition.

The composition according to the invention may also comprise one or more silicones in soluble, dispersed or microdispersed form. The silicones are then preferably present in an amount ranging from 0.01 % to 10% by weight and more preferentially from 0. 1 % to 5 % by weight relative to the total weight of the composition. Examp les that may especially be mentioned include silicone oils, for instance linear or cyclic po lydimethylsiloxanes.

The composition may also comprise one or more ionic or nonionic fixing polymers other than the compounds i) .

All the additional anionic, cationic, amphoteric and nonionic fixing po lymers and mixtures thereo f used in the art may be used in the compositions according to the present application.

The anionic fixing po lymers generally used are polymers comprising groups derived from carboxylic acid, sulfonic acid or phosphoric acid and have a number-average mo lecular mass of approximately between 500 and 5 000 000.

The carboxylic groups are provided by unsaturated monocarboxylic or dicarboxylic acid monomers such as those corresponding to the formula:

in which n is an integer from 0 to 1 0, Ai denotes a methylene group, optionally linked to the carbon atom o f the unsaturated group or to the neighbouring methylene group when n is greater than 1 , via a heteroatom such as oxygen or sulfur, R₇ denotes a hydrogen atom, or a phenyl or benzyl group, Rs denotes a hydrogen atom or a lower alkyl or carboxyl group, R9 denotes a hydrogen atom, a lower alkyl group or a -CH₂-COOH, phenyl or benzyl group .

In the abovementioned formula, a lower alkyl group preferably denotes a group containing 1 to 4 carbon atoms, and in particular methyl and ethyl groups .

The anionic fixing polymers comprising carboxylic groups which are preferred according to the invention are :

A) acrylic or methacrylic acid homo- or copolymers, or salts thereo f and in particular the products sold under the names Versicol® E or K by the company Allied Co lloid and Ultrahold® by the company BASF, the copolymers of acrylic acid and of acrylamide sold in the form o f their sodium salts under the names Reten 421 , 423 or 425 by the company Hercules, the sodium salts o f po lyhydroxycarboxylic acids;

B) copolymers o f acrylic or methacrylic acid with a monoethylenic monomer such as ethylene, styrene, vinyl esters, acrylic or methacrylic acid esters, optionally grafted onto a polyalkylene glycol such as polyethylene glyco l and optionally crosslinked. Such polymers are described in particular in French patent 1 222 944 and German patent application 2 330 956, the copolymers of this type comprising an optionally N-alkylated and/or hydroxyalkylated acrylamide unit in their chain, as described in particular in Luxembourgian patent applications 75370 and 75371 or provided under the name Quadramer by American Cyanamid. Mention may also be made o f copolymers of acrylic acid and of C 1 - C4 alkyl methacrylate and terpolymers of vinylpyrrolidone, acrylic acid and a methacrylate o f a C 1 - C20 alkyl, for example lauryl methacrylate, such as the product sold by the company ISP under the name Acrylidone® LM and methacrylic acid/ethyl acrylate/tert-butyl acrylate terpolymers such as the product sold under the name Luvimer® 100 P by the company BASF .

Mention may also be made of methacrylic acid/acrylic acid/ethyl acrylate/methyl methacrylate copolymers as an aqueous dispersion, sold under the name Amerhold® DR 25 by the company Amercho l;

C) crotonic acid copolymers, such as those comprising vinyl acetate or propionate units in their chain and optionally other monomers such as allyl esters or methallyl esters, vinyl ether or vinyl ester of a linear or branched saturated carboxylic acid with a long hydrocarbon-based chain, such as those containing at least 5 carbon atoms, it being possible for these polymers optionally to be grafted or crosslinked, or alternatively another vinyl, allyl or methallyl ester monomer o f an a- or β-cyclic carboxylic acid. Such polymers are described, inter alia, in French patent Nos. 1 222 944, 1 580 545 , 2 265 782, 2 265 78 1 , 1 564 1 10 and 2 439 798. Commercial products that come under this category are the resins 28-29-30, 26- 13 - 14 and 28- 13 - 10 so ld by National Starch;

D) copolymers of C 4 - C 8 monounsaturated carboxylic acids or anhydrides chosen from:

- copolymers comprising (i) one or more maleic, fumaric or itaconic acids or anhydrides and (ii) at least one monomer chosen from vinyl esters, vinyl ethers, vinyl halides, phenylvinyl derivatives, acrylic acid and esters thereof, the anhydride functions of these copolymers optionally being monoesterified or monoamidated. Such polymers are described, in particular, in US patent Nos . 2 047 398 , 2 723 248 and 2 102 1 1 3 , and GB patent No . 839 805. Commercial products are especially those sold under the names Gantrez® AN or ES by the company ISP;

- copolymers comprising (i) one or more maleic, citraconic or itaconic anhydride units and (ii) one or more monomers chosen from allyl or methallyl esters optionally comprising one or more acrylamide, methacrylamide, cc-o lefin, acrylic or methacrylic ester, acrylic or methacrylic acid or vinylpyrrolidone groups in their chain, the anhydride functions o f these copolymers optionally being monoesterified or monoamidated.

These po lymers are described, for example, in French patent Nos. 2 350 384 and 2 357 241 by the Applicant;

E) polyacrylamides comprising carboxylate groups .

The homopolymers and copolymers comprising sulfonic groups are po lymers comprising vinylsulfonic, styrenesulfonic, naphthalenesulfonic or acrylamidoalkylsulfonic units .

These po lymers may especially be selected from:

- polyvinylsulfonic acid salts having a mo lecular weight of approximately between 1000 and 100 000, and also the copolymers with an unsaturated comonomer such as acrylic or methacrylic acids and esters thereof, and also acrylamide or derivatives thereo f, vinyl ethers and vinylpyrrolidone; - polystyrenesulfonic acid salts such as the sodium salts that are so ld for example under the names Flexan® 500 and Flexan® 1 30 by National Starch. These compounds are described in patent FR 2 198 7 19 ;

- polyacrylamidesulfonic acid salts, such as those mentioned in patent US 4 128 63 1 and more particularly polyacrylamido ethyl- propanesulfonic acid sold under the name Cosmedia Polymer HSP 1 1 80 by Henkel.

Mention may be made, as other anionic fixing polymer which can be used according to the invention, of the branched blo ck anionic polymer so ld under the name Fixate G- 100 by Noveon.

According to the invention, the anionic fixing po lymers are preferably selected from acrylic acid copolymers such as the acrylic acid/ethyl acrylate/N-tert-butylacrylamide terpolymers sold in particular under the name Ultrahold® Strong by the company BASF, copolymers derived from crotonic acid, such as vinyl acetate/vinyl tert-butylbenzoate/crotonic acid terpolymers and the crotonic acid/vinyl acetate/vinyl neododecanoate terpolymers sold especially under the name Resin 28-29-30 by the company National Starch, polymers derived from maleic, fumaric or itaconic acids or anhydrides with vinyl esters, vinyl ethers, vinyl halides, phenylvinyl derivatives and acrylic acid and esters thereof, such as the methyl vinyl ether/monoesterified maleic anhydride copolymers sold, for example, under the name Gantrez® by the company ISP, the copolymers of methacrylic acid and o f methyl methacrylate so ld under the name Eudragit® L by the company Rohm Pharma, the copolymers of methacrylic acid and o f ethyl acrylate sold under the name Luvimer® MAEX or MAE by the company BASF, the vinyl acetate/crotonic acid copolymers sold under the name Luviset CA 66 by the company BASF, the vinyl acetate/crotonic acid copolymers grafted with polyethylene glyco l so ld under the name Aristo flex® A by the company BASF, and the po lymer so ld under the name Fixate G- 100 by the company Noveon. Among the anionic fixing polymers mentioned above, it is more particularly preferred in the context of the present invention to use the methyl vinyl ether/monoesterified maleic anhydride copolymers sold as Gantrez^® ES 425 by ISP, the acrylic acid/ethyl acrylate/N-tert-butylacrylamide terpolymers sold as Ultraho ld^® Strong by BASF, the copolymers of methacrylic acid and methyl methacrylate so ld as Eudragit^® L by Rohm Pharma, the vinyl acetate/vinyl tert- butylbenzoate/crotonic acid terpolymers and the crotonic acid/vinyl acetate/vinyl neododecanoate terpolymers sold as Resin 28-29-30 by National Starch, the copolymers of methacrylic acid and ethyl acrylate so ld as Luvimer^® MAEX or MAE by BASF, the vinylpyrro lidone/acrylic acid/lauryl methacrylate terpolymers sold as Acrylidone^® LM by ISP and the po lymer so ld as Fixate G- 100 by Noveon.

The cationic fixing film-forming polymers that can be used according to the present invention are preferably selected from polymers comprising primary, secondary, tertiary and/or quaternary amine groups forming part of the polymer chain or directly attached thereto, and having a mo lecular weight of between 500 and about 5 000 000 and preferably between 1000 and 3 000 000.

Among these polymers, mention may be made more particularly of the fo llowing cationic po lymers :

( 1 ) homopolymers or copolymers derived from acrylic or methacrylic esters or amides and comprising at least one of the units of the fo llowing formulae :

-CH— C- -CH— C- c=o C—

I I

in which:

R₃ denotes a hydrogen atom or a CH₃ radical;

A is a linear or branched alkyl group comprising from 1 to 6 carbon atoms or a hydroxyalkyl group comprising from 1 to 4 carbon atoms;

R₄, R5 and R₆, which may be identical or different, represent an alkyl group containing from 1 to 1 8 carbon atoms or a benzyl radical;

X denotes a methosulfate anion or a halide such as chloride or bromide.

The copolymers of the family ( 1 ) also contain one or more units derived from comonomers that may be chosen from the family o f acrylamides, methacrylamides, diacetone acrylamides, acrylamides and methacrylamides substituted on the nitrogen with lower ( C 1 - C 4 ) alkyl groups, groups derived from acrylic or methacrylic acids or esters thereof, vinyllactams such as vinylpyrrolidone or vinylcaprolactam, and vinyl esters .

Thus, among these copolymers of family ( 1 ), mention may be made o f:

- copolymers of acrylamide and of dimethylaminoethyl methacrylate quaternized with dimethyl sulfate or with a dimethyl halide, such as the product sold under the name Hercoflo c® by the company Hercules,

- copolymers o f acrylamide and o f methacryloyloxyethyltrimethylammonium chloride, described, for example, in patent application EP-A-080 976 and sold under the name Bina Quat P 1 00 by the company Ciba Geigy,

copolymers of acrylamide and of methacryloyloxyethyltrimethylammonium methosulfate, such as the product sold under the name Reten by the company Hercules,

- fatty-chain polymers containing a vinylpyrrolidone unit, such as the products sold under the name Styleze W20 and Styleze W 10 by the company ISP,

and quaternized vinylpyrrolidone/dimethylamino- propylmethacrylamide copolymers, such as the products sold under the name Gafquat® HS 100 by the company ISP;

(2) cationic po lysaccharides, preferably containing quaternary ammonium, such as those described in US patent Nos. 3 589 578 and 4 03 1 307, such as guar gums containing trialkylammonium cationic groups . Such products are sold in particular under the trade names Jaguar C I 3 S, Jaguar C 15 and Jaguar C 17 by Meyhall;

(3) quaternary copolymers of vinylpyrrolidone and of vinylimidazole;

(4) chitosans or salts thereof; the salts that can be used are, in particular, chitosan acetate, lactate, glutamate, gluconate or pyrrolidonecarboxylate.

These compounds include the chitosan having a degree o f deacetylation o f 90.5 % by weight which is sold under the name Kytan Brut Standard by the company Aber Technologies, and the chitosan pyrrolidone carboxylate which is sold under the name Kytamer® PC by the company Amercho l;

(5) cationic cellulo se derivatives such as copolymers of cellulo se or of cellulo se derivatives grafted with a water-so luble monomer comprising a quaternary ammonium, and described in particular in patent US 4 13 1 576, such as hydroxyalkylcelluloses, for instance hydroxymethyl-, hydroxyethyl- or hydroxypropylcelluloses grafted in particular with a methacryloyloxyethyltrimethylammonium, methacrylamidopropyltrimethylammonium or dimethyldiallylammonium salt.

The commercial products corresponding to this definition are more particularly the products sold under the name Celquat L 200 and Celquat H 100 by the company National Starch.

The amphoteric fixing polymers that may be used in accordance with the invention may be selected from polymers comprising units B and C distributed statistically in the po lymer chain, where B denotes a unit derived from a monomer comprising at least one basic nitrogen atom and C denotes a unit derived from an acid monomer comprising one or more carboxylic or sulfonic groups, or alternatively B and C may denote groups derived from carboxybetaine or sulfobetaine zwitterionic monomers.

B and C can also denote a cationic polymer chain comprising primary, secondary, tertiary or quaternary amine groups, in which at least one of the amine groups bears a carboxylic or sulfonic group connected via a hydrocarbon-based group, or alternatively B and C form part of a chain o f a polymer comprising an α, β-dicarboxylic ethylene unit in which one of the carboxylic groups has been made to react with a po lyamine comprising one or more primary or secondary amine groups .

The amphoteric fixing polymers corresponding to the definition given above that are more particularly preferred are chosen from the fo llowing polymers :

( 1 ) copolymers containing acidic vinyl units and basic vinyl units, such as those resulting from the copolymerization of a monomer derived from a vinyl compound bearing a carboxylic group such as, more particularly, acrylic acid, methacrylic acid, maleic acid, a-chloroacrylic acid, and o f a basic monomer derived from a substituted vinyl compound containing at least one basic atom, such as, more particularly, dialkylaminoalkyl methacrylate and acrylate, dialkylaminoalkylmethacrylamide and acrylamide. Such compounds are described in US patent No . 3 836 537.

(2) polymers comprising units derived from:

a) at least one monomer chosen from acrylamides or methacrylamides substituted on the nitrogen atom with an alkyl group, b) at least one acidic comonomer containing one or more reactive carboxylic groups, and

c) at least one basic comonomer such as esters containing primary, secondary, tertiary and quaternary amine substituents of acrylic and methacrylic acids and the product of quaternization o f dimethylaminoethyl methacrylate with dimethyl or diethyl sulfate. The N-sub stituted acrylamides or methacrylamides that are more particularly preferred according to the invention are compounds in which the alkyl groups contain from 2 to 12 carbon atoms and more particularly N-ethylacrylamide, N-tert-butylacrylamide, N-tert- octylacrylamide, N-octylacrylamide, N-decylacrylamide,

N-dodecylacrylamide and the corresponding methacrylamides .

The acidic comonomers are more p articularly chosen fro m acrylic , methacrylic, crotonic, itaconic , maleic and fumaric acid and alkyl monoesters, containing 1 to 4 carbon atoms , of maleic or fumaric acid or anhydride .

The preferred basic comonomers are aminoethyl, butylamino ethyl, Ν,Ν ' -dimethylaminoethyl and N-tert-butylamino ethyl methacrylates .

The copolymers whose CTFA (4th edition, 1 99 1 ) name is octylacrylamide/acrylates/butylamino ethyl met hacry late copolymer, such as the products sold under the name Amphomer® or Lovocryl®

47 by the company National Starch, are particularly used.

(3 ) crosslinked and acylated polyamino amides partially or totally derived from polyaminoamides of general formula :

— \- CO— R₁₀— CO— Z— J— in which R_{1 0} represents a divalent group derived from a saturated dicarboxylic acid, an aliphatic monocarboxylic or dicarboxylic acid containing an ethylenic double bond, an ester of a lower alkanol, containing 1 to 6 carbon atoms , o f these acids , or a group derived from the addition o f any one o f the said acids to a bis(primary) or bis(secondary) amine , and Z denotes a group derived from a bis(primary), mono(secondary) or bis(secondary) polyalkylene- polyamine and preferably represents :

a) in proportions of from 60 mol% to 100 mol%, the group

N H^(CH₂) — NH- where x = 2 and p = 2 or 3 , or alternatively x = 3 and p = 2 , this group being derived from diethylenetriamine, triethylenetetramine or dipropylenetriamine;

b) in proportions of from 0 to 40 mo l%, the group (IV) above in which x = 2 and p = 1 and which is derived from ethylenediamine, or the group derived from piperazine :

/ \

N N

\ /

c) in proportions of from 0 to 20 mo l%, the -NH-(CH₂)6-NH- group derived from hexamethylenediamine,

these polyaminoamides being crosslinked by addition reaction of a difunctional crosslinking agent chosen from epihalohydrins, diepoxides, dianhydrides and bis-unsaturated derivatives, using from 0.025 to 0.35 mo l o f crosslinking agent per amine group of the polyamino amide and acylated by the action o f acrylic acid, chloroacetic acid or an alkane sultone, or salts thereo f.

The saturated carboxylic acids are preferably chosen from acids having 6 to 10 carbon atoms, such as adipic acid, 2,2,4- trimethyladipic acid and 2,4,4-trimethyladipic acid, terephthalic acid, acids containing an ethylenic double bond such as, for example, acrylic acid, methacrylic acid and itaconic acid.

The alkane sultones used in the acylation are preferably propane sultone or butane sultone; the salts of the acylating agents are preferably the sodium or potassium salts;

(4) polymers comprising zwitterionic units of formula:

in which Rn denotes a polymerizable unsaturated group such as an acrylate, methacrylate, acrylamide or methacrylamide group, y and z represent an integer from 1 to 3 , Ri ₂ and R represent a hydrogen atom, a methyl, ethyl or propyl group, Ri ₄ and R1 5 represent a hydrogen atom or an alkyl group such that the sum of the carbon atoms in Ri₄ and R15 does not exceed 10.

The polymers comprising such units may also comprise units derived from non-zwitterionic monomers such as dimethyl- or diethylaminoethyl acrylate or methacrylate or alkyl acrylates or methacrylates, acrylamides or methacrylamides, or vinyl acetate.

By way of example, mention may be made of methyl met hacry late/methyl dimethylcarboxymethylammonio ethyl methacrylate copolymers such as the product sold under the name Diaformer Z301 by Sandoz.

(5) polymers derived from chitosan comprising monomer units corresponding to the following formulae:

R— COOH

(D) (E) (F)

the unit (D) being present in proportions of between 0 and 30%, the unit (E) in proportions of between 5% and 50%> and the unit (F) in proportions of between 30%> and 90%>, it being understood that, in this unit (F), Ri₆ represents a group of formula:

in which, if q = 0, Ri₇, Ris and R19, which may be identical or different, each represent a hydrogen atom, a methyl, hydroxyl, acetoxy or amino residue, a monoalkylamine residue or a dialkylamine residue that are optionally interrupted by one or more nitrogen atoms and/or optionally substituted with one or more amine, hydroxyl, carboxyl, alkylthio or sulfonic groups, an alkylthio residue in which the alkyl group bears an amino residue, at least one of the groups R17 , Ri s and Ri 9 being, in this case, a hydrogen atom;

or, if q = 1 , R17 , Ri ₈ and R19 each represent a hydrogen atom, as well as the salts formed by these compounds with bases or acids.

(6) Polymers with units corresponding to the general formula (V) are described, for example, in French patent 1 400 366 :

R 20

(CH— CFL)

COOH CO

I

N -

¾4

N— R 23

R 22 in which R₂o represents a hydrogen atom, a CH3 O , CH₃CH₂0 or phenyl group, R₂ i denotes a hydrogen atom or a lower alkyl group such as methyl or ethyl, R₂₂ denotes a hydrogen atom or a C i _₆ lower alkyl group such as methyl or ethyl, R₂₃ denotes a C i _₆ lower alkyl group such as methyl or ethyl or a group corresponding to the formula : -R₂₄-N(R₂₂)₂, R₂₄ representing a -CH₂-CH₂-, -CH₂-CH₂-CH₂- or -CH₂- CH(CH₃)- group, R₂₂ having the meanings mentioned above.

(7) Polymers derived from the N-carboxyalkylation o f chitosan, such as N-carboxymethylchitosan or N-carboxybutylchitosan so ld under the name Evalsan by the company Jan Dekker.

(8) Amphoteric po lymers o f the -D-X-D-X type chosen from: a) polymers obtained by the action o f chloroacetic acid or sodium chloroacetate on compounds comprising at least one unit o f formula: -D-X-D-X-D- where D denotes a group

/ \

N N

\ /

and X denotes the symbo l E or E ' , E or E ' , which may be identical or different, denote a divalent group that is an alkylene group with a straight or branched chain containing up to 7 carbon atoms in the main chain, which is unsubstituted or substituted with hydroxyl groups and which can comprise, in addition to the oxygen, nitrogen and sulfur atoms, 1 to 3 aromatic and/or heterocyclic rings; the oxygen, nitrogen and sulfur atoms being present in the form o f ether, thioether, sulfoxide, sulfone, sulfonium, alkylamine or alkenylamine groups, hydroxyl, benzylamine, amine oxide, quaternary ammonium, amide, imide, alcoho l, ester and/or urethane groups;

b) po lymers o f formula:

-D-X-D-X- where D denotes a group

/ \

N N

\ /

and X denotes the symbol E or E ' and at least once E ' ; E having the meaning given above and E ' is a divalent group that is an alkylene group with a straight or branched chain having up to 7 carbon atoms in the main chain, which is unsubstituted or substituted with one or more hydroxyl groups and containing one or more nitrogen atoms, the nitrogen atom being substituted with an alkyl chain that is optionally interrupted by an oxygen atom and necessarily comprising one or more carboxyl functions or one or more hydroxyl functions and betainized by reaction with chloroacetic acid or sodium chloroacetate.

(9) (Ci -C₅)alkyl vinyl ether/maleic anhydride copolymers partially modified by semiamidation with an N,N- dialkylaminoalkylamine such as Ν,Ν-dimethylaminopropylamine or by semiesterification with an Ν,Ν-dialkylaminoalkanol. These copolymers can also comprise other vinyl comonomers such as vinylcapro lactam.

Among the amphoteric fixing polymers mentioned above, the ones that are most particularly preferred according to the invention are those of class (3 ), such as the copolymers whose CTFA name is Octylacrylamide/acrylates/butylamino ethyl methacrylate copolymer, such as the products sold under the name Amphomer®, Amphomer® LV 71 or Lovocryl® 47 by the company National Starch and those o f class (4) such as the methyl methacrylate/methyl dimethylcarboxymethylammonio ethyl methacrylate copolymers, so ld, for example, under the name Diaformer Z301 by the company Sandoz .

The nonionic fixing polymers that may be used according to the present invention are chosen, for example, from:

- polyalkyloxazo lines;

- vinyl acetate homopolymers;

- vinyl acetate copolymers, for instance copolymers of vinyl acetate and of acrylic ester; copolymers of vinyl acetate and of ethylene, or copolymers of vinyl acetate and of maleic ester, for example o f dibutyl maleate;

- acrylic ester homopolymers and copolymers, for instance copolymers of alkyl acrylates and of alkyl methacrylates, such as the products sold by the company Rohm & Haas under the names Primal® AC-261 K and Eudragit® NE 30 D, by the company BASF under the name 8845 , or by the company Hoechst under the name Appretan® N92 12;

- copolymers o f acrylonitrile and of a nonionic monomer chosen, for example, from butadiene and alkyl (meth)acrylates; mention may be made o f the products sold under the name CJ 0601 B by the company Rohm & Haas;

- styrene homopolymers;

- styrene copolymers, for instance copolymers of styrene and of alkyl (meth)acrylate, such as the products Mowilith® LDM 691 1 , Mowilith® DM 61 1 and Mowilith® LDM 6070 sold by the company Hoechst, and the products Rhodopas® SD 215 and Rhodopas® DS 9 10 so ld by the company Rhone-Poulenc; copolymers of styrene, of alkyl methacrylate and o f alkyl acrylate; copolymers of styrene and of butadiene; or copolymers of styrene, of butadiene and o f vinylpyridine;

- polyamides;

vinyllactam homopolymers such as vinylpyrrolidone homopolymers and such as the polyvinylcaprolactam so ld under the name Luvisko l® Plus by the company BASF; and

- vinyllactam copolymers such as a poly(vinylpyrrolidone/vinyllactam) copolymer sold under the trade name Luvitec® VPC 55K65W by the company BASF, poly(vinylpyrrolidone/vinyl acetate) copolymers, such as those sold under the name PVPVA® S630L by the company ISP, Luviskol® VA 73 , VA 64 , VA 55 , VA 37 and VA 28 by the company BASF; and poly(vinylpyrrolidone/vinyl acetate/vinyl propionate) terpolymers, for instance the product sold under the name Luviskol® VAP 343 by the company BASF .

The alkyl groups of the abovementioned nonionic po lymers preferably contain from 1 to 6 carbon atoms .

According to the invention, it is also possible to use fixing polymers o f grafted silicone type comprising a polysiloxane portion and a portion constituted of a non-silicone organic chain, one of the two portions constituting the main chain of the polymer and the other being grafted to the said main chain.

These po lymers are described, for example, in patent applications EP-A-0 4 12 704, EP-A-0 412 707, EP-A-0 640 105 and WO 95/00578 , EP-A-0 582 152 and WO 93/23009 and patents US 4 693 935 , US 4 728 571 and US 4 972 037.

These polymers may be amphoteric, anionic or nonionic, and are preferably anionic or nonionic.

Such polymers are, for example, copolymers that may be obtained by free radical polymerization from the monomer mixture formed from: a) 50% to 90% by weight of tert-butyl acrylate,

b) 0%) to 40%) by weight of acrylic acid,

c) 5 % to 40% by weight of a silicone macromer of formula:

CH₂ — CH

in which v is a number ranging from 5 to 700, the weight percentages being calculated relative to the total weight of the monomers.

Other examples of grafted silicone polymers are in particular polydimethylsiloxanes (PDMSs) to which mixed polymer units of the poly(meth)acrylic acid type and o f the poly(alkyl (meth)acrylate) type are grafted via a thiopropylene-type connecting link and polydimethylsiloxanes (PDMSs) to which polymer units of the poly(isobutyl (meth)acrylate) type are grafted via a thiopropylene-type connecting link.

Another type o f silicone fixing po lymer that may be mentioned is the product Luviflex® Silk sold by BASF .

Fixing po lymers that may also be used are functionalized or non-functionalized, cationic, nonionic, anionic or amphoteric, silicone or non-silicone polyurethanes, or mixtures thereof.

The po lyurethanes particularly targeted by the present invention are those described in patent applications EP 0 75 1 162 , EP 0 637 600, EP 0 648 485 and FR 2 743 297, of which the Applicant is the proprietor, and patent applications EP 0 656 02 1 and WO 94/035 10 from the company BASF and EP 0 619 1 1 1 from the company National Starch.

Polyurethanes particularly suitable in the present invention include the products sold under the names Luviset PUR® and Luviset® Si PUR by the company BASF . In a preferred variant, the fixing polymers are nonionic or anionic.

In another preferred variant, the fixing polymers are soluble in the composition o f the invention.

The concentration o f additional fixing polymer(s) used in the compositions according to the present invention may range from 0. 1 % to 20% and preferably from 0.2% to 10% by weight relative to the total weight of the composition.

The cosmetic composition may also comprise one or more additives chosen from nacreous agents; opacifiers; plasticizers; sunscreens; fragrances; dyes; preserving agents; pH stabilizers; acids; bases; dyes; mineral fillers; glitter flakes, and any other additive conventionally used in the cosmetics field.

A person skilled in the art will take care to select the optional additives and the amounts thereof so that they do not interfere with the properties of the compositions of the present invention.

These additives may be present in the composition according to the invention in an amount ranging from 0 to 20% by weight relative to the total weight of the composition.

The compositions according to the invention may be, inter alia, in the form o f liquids that are thickened to a greater or lesser extent, gels, sera, creams, pastes, sprays or foams .

In particular, the composition o f the invention may be applied from an aerosol device containing at least one propellant chosen from air, carbon dioxide, C 3 - C 5 alkanes and dimethyl ether, and mixtures thereo f.

Preferably, the compositions according to the invention are in the form o f gels, serums or mousses.

The cosmetic composition according to the invention may advantageously be used for the cosmetic treatment of the hair. In particular, the composition may be used for styling the hair, for example for shaping and/or fixing the hair style. According to one particularly preferred embodiment, the cosmetic composition is used for simultaneously styling and conditioning the hair.

The present invention also relates to a cosmetic process for treating the hair, for example a haircare process, or a process for shaping and/or holding the hairstyle, which consists in applying to the hair an effective amount of a composition according to the invention as described above and then in optionally rinsing after an optional leave-in time.

The process of the invention may be performed at room temperature (25 °C) or using heat at a temperature ranging from 40° C to 220°C using any heating device : hood, hairdryer, tongs .

Preferably, the composition according to the invention is not rinsed o ff.

The examples that fo llow are given as illustrations o f the present invention.

EXAMPLE

Composition (A), corresponding to a hair gel, and composition (B), corresponding to a hair serum, in accordance with the invention, are prepared from the ingredients, indicated as weight percentages, in the table below:

Composition A: Hair gel

(^{1 )} Natrosol 250 MR so ld by Ashland

⁽²⁾ Luvigel Advance so ld by BASF

^{(3 )} Lupamin 9030 or Luviquat 9030 sold by BASF Composition B: Hair serum

Luvigel Advance sold by BASF

Lupamin 9030 or Luviquat 9030 sold by BASF

(⁴⁾ Jaguar C13S sold by Rhodia

⁽⁵⁾ Abil B 8843 sold by Evonik Goldschmidt

The performance qualities of these compositions were evaluated by professionals on a panel of models.

Compositions (A) and (B) spread easily onto the hair. After application, the hair is easy to disentangle. The styling is easy. There are no unsightly residues after drying.

Compositions (A) and (B) give the hair a soft, smooth feel.

Claims

1 . Cosmetic composition for treating keratin fibres , in particular human keratin fibres such as the hair, comprising, in a cosmetically acceptable medium:

(i) one or more fixing polymers comprising one or more unit s corresponding to formula (I) b elow :

in which :

Ri represents a hydrogen atom or a methyl group ,

R₂ and R₃ represent, independently of each other, a hydrogen atom or a linear or branched, in particular linear, C ₁ - C4 alkyl radical, n denotes 0 or 1 ,

Z denotes a group -COO-(CH₂)_m- ,

m denotes an integer ranging from 1 to 4; and

(ii) one or more optionally salified thickening po lymers comprising units derived from vinylpyrrolidone, vinylimidazole , 3 -methyl- 1 -vinylimidazolium chloride and methacrylic acid.

2. Cosmetic composition according to C laim 1 , characterized in that Ri represents a hydrogen atom.

3. Cosmetic composition according to Claim 1 or 2, characterized in that R₂ and R₃ represent a hydro gen atom.

4. Cosmetic composition according to any one of C laims 1 to 3 , characterized in that n is equal to 0.

5. Cosmetic composition according to any one o f the preceding claims , characterized in that the fixing polymer(s) comprising one or more units corresponding to formula (I) also comprise one or more units derived from vinylformamide.

6. Cosmetic composition according to any one o f the preceding claims, characterized in that the fixing polymer(s) comprising one or more units corresponding to formula (I) are chosen from copolymers comprising in their structure :

(a) one or more units corresponding to formula (A) below:

— CH^— CH—

(A)

(b) one or more units corresponding to formula (B) below :

— CH^— CH—

NH— C-H

I I

⁰ (B)

7. Cosmetic composition according to Claim 1 , characterized in that Ri represents a methyl group .

8. Cosmetic composition according to Claim 7, characterized in that R₂ and R₃ represent a methyl group .

9. Cosmetic composition according to Claims 7 and 8 , characterized in that n is equal to 1 and m is equal to 2.

10. Composition according to Claims 1 and 7 to 9, characterized in that the fixing polymer comprising one or more units corresponding to formula (I) is a vinylpyrrolidone/dimethylaminoethyl methacrylate copolymer.

1 1 . Cosmetic composition according to any one o f the preceding claims, characterized in that the fixing polymer(s) comprising one or more units of formula (I) are present in a content ranging from 0.05 % to 20% by weight, preferably in a content ranging from 0. 1 % to 10% by weight and more preferentially in a content ranging from 0.2% to 5 % by weight relative to the total weight of the composition.

12. Cosmetic composition according to any one o f the preceding claims, characterized in that the thickening polymer is Polyquaternium-86.

13. Cosmetic composition according to any one o f the preceding claims, characterized in that the thickening polymer(s) comprising in their structure units derived from vinylpyrrolidone, vinylimidazole, 3 -methyl- 1 -vinylimidazolium chloride and methacrylic acid are present in the cosmetic composition in a content ranging from 0.05 % to 20% by weight, preferably in a content ranging from 0. 1 % to 10% by weight and more preferentially in a content ranging from 0.2% to 5 % by weight relative to the total weight of the cosmetic composition.

14. Cosmetic composition according to any one o f the preceding claims, characterized in that the weight ratio between the total amount of thickening polymer(s), on the one hand, and the total amount of fixing polymer(s) comprising one or more units corresponding to formula (I) ranges from 0. 1 to 1 0 and more preferentially from 0.5 to 1 .5.

15. Cosmetic composition according to any one o f the preceding claims, characterized in that it also comprises one or more non-silicones fatty substances .

16. Cosmetic composition according to any one o f the preceding claims, characterized in that it comprises one or more surfactants, preferably nonionic surfactants .

17. Cosmetic composition according to any one of the preceding claims, characterized in that it comprises one or more additional thickeners.

18. Cosmetic composition according to any one of the preceding claims, characterized in that it comprises one or more additional anionic, cationic, amphoteric or nonionic fixing polymers .

19. Cosmetic composition according to any one of the preceding claims, characterized in that it comprises one or more propellants .

20. Cosmetic process for treating keratin fibres, in particular human keratin fibres such as the hair, characterized in that it consists in applying to the said fibres an effective amount of a composition as defined according to any one o f Claims 1 to 19.

21 . Use o f a composition according to any one of Claims 1 to

19, for shaping and/or fixing the hairstyle .

22. Use o f a composition according to any one of Claims 1 to 19, for simultaneously styling and conditioning the hair.