Composition comprising at least two different anionic surfactants, non-ionic and amphoteric surfactants, and cationic or amphoteric polymers

The present invention relates to a cosmetic composition, in particular a hair compo sition, and most particularly for cleansing and/or conditioning the hair, comprising a particular combination of anionic, nonionic and amphoteric surfactants, and also one or more cationic and/or amphoteric polymers. The invention also relates to a pro cess for the cosmetic treatment of keratin materials using said composition, and also to the use of said composition for the cosmetic treatment of keratin materials, in particular for conferring conditioning properties on said keratin materials.

Hair can generally be damaged and embrittled by the action of external atmospheric agents such as light and bad weather, and/or by mechanical or chemical treatments, such as brushing, combing, dyeing, bleaching, permanent-waving and/or relaxing. To remedy these drawbacks, it is now common practice to have recourse to hair compositions which make it possible to condition the hair after these treatments to give it in particular sheen, softness, suppleness, lightness, a natural feel and disen tangling properties. These hair compositions may be, for example, care composi- tions, to be applied before or after a shampooing operation, or else compositions that are both washing and conditioning compositions, such as conditioning sham poos. The latter generally have good washing power, but the cosmetic properties provided still have room for improvement; conditioning agents, most commonly sili cone-based conditioning agents, are then generally included in these shampoos.

However, silicones are not always well liked by consumers, who are increasingly in search of compositions which can cleanse the hair while at the same time condition ing it, but which do not comprise silicones.

It has been proposed to replace silicones with various carbon-based conditioning agents, such as fatty alcohols or fatty esters; however, these hair compositions are not necessarily entirely satisfactory and still have room for improvement, notably with regard to the deposition of the conditioning agents, notably nonsilicone condi tioning agents, on keratin fibers. There is thus a real need to develop cosmetic compositions, notably hair composi tions, intended for cleansing and conditioning keratin materials, in particular the hair, which are capable of giving the hair improved cosmetic properties, notably in terms of disentangling, smooth feel and visual smoothness, suppleness and coating of the fiber, while at the same time retaining good washing power, notably good foaming power (abundant foam, rapidly generated, of good quality).

This aim is achieved by the present invention, one subject of which is a cosmetic composition, preferably a hair composition, comprising: (i) one or more anionic surfactants chosen from polyoxyalkylenated alkyl(am- ido)ether carboxylic acids and salts thereof;

(ii) one or more non-sulfated anionic surfactants other than the polyoxyalkylenated alkyl(amido)ether carboxylic acid anionic surfactant(s) (i);

(iii) one or more nonionic surfactants chosen from alkyl(poly)glycosides;

(iv) one or more amphoteric surfactants;

(v) one or more polymers chosen from amphoteric polymers and cationic polymers.

It has been found that the composition according to the invention has satisfactory foaming power. It allows the production of an abundant, rapidly-generated foam, which spreads easily on keratin fibers and is easy to remove on rinsing.

Certain users of shampoos, notably conditioning shampoos, may have more or less sensitized hair, i.e. hair that is generally damaged or embrittled by the action of ex ternal atmospheric agents such as light and bad weather, and/or the action of me chanical or chemical treatments such as brushing, combing, dyeing, bleaching, per manent-waving and/or relaxing. Thus, the composition according to the invention also makes it possible to improve the cosmetic properties given to the keratin fibers, notably to the hair, preferably sensitized hair. In particular, the composition accord ing to the invention makes it possible to improve the disentangling and the supple ness of the hair, and also the smooth feel and visual smoothness of the hair, and the coating of the fibers. These properties make it possible to confer a good level of perception of care given to the hair.

The composition according to the invention also has the advantage of being stable on storage both at room temperature (20-25 °C) and at 45 °C, notably as regards its visual aspect and/or its viscosity.

For the purposes of the present invention, the term "stable" refers to a composition which, after two months of storage, shows no change in appearance, color, odor or viscosity.

Preferably, the composition according to the invention is noncoloring.

According to the present invention, the term "noncoloring composition" refers to a composition not containing any dye for keratin fibers, such as direct dyes or oxida tion dye precursors (bases and/or couplers). If they are present, their content does not exceed 0.005% by weight, relative to the total weight of the composition. Spe cifically, at such a content, only the composition would be dyed, i.e. no dyeing effect would be observed on the keratin fibers.

In the following text, and unless otherwise indicated, the limits of a range of values are included in that range, notably in the expressions "between" and "ranging from ... to ...".

Moreover, the expression "at least one" used in the present description is equivalent to the expression "one or more", and may be replaced therewith. Anionic surfactants

As indicated above, the composition according to the invention comprises at least one anionic surfactant of polyoxyalkylenated alkyl(amido)ether carboxylic acid type (i) and at least one non-sulfated anionic surfactant (ii) other than the anionic surfac tants) (i).

Thus, for the purposes of the invention, the cosmetic composition comprises at least two different anionic surfactants.

The term "anionic surfactant" means a surfactant including, as ionic or ionizable groups, only anionic groups.

In the present description, a species is termed "anionic" when it bears at least one permanent negative charge or when it can be ionized into a negatively charged spe cies, under the conditions of use of the composition of the invention (for example the medium or the pH) and not comprising any cationic charge.

Polvoxyalkylenated alkvKamidolether carboxylic acids (i)

The composition of the invention contains at least one anionic surfactant chosen from polyoxyalkylenated alkyl(amido)ether carboxylic acids and salts thereof, in par ticular those including from 2 to 50 alkylene oxide and in particular ethylene oxide groups.

The polyoxyalkylenated alkyl(amido)ether carboxylic acids that may be used are preferably chosen from those of formula (1 ):

in which:

- R1 represents a linear or branched C6-C24 alkyl or alkenyl radical, a (C8-C9)al- kylphenyl radical, a radical R2CONH-CH2-CH2- with R2 denoting a linear or branched C9-C21 alkyl or alkenyl radical; preferably, R1 is a C8-C20, preferably C8- C18, alkyl radical,

- n is an integer or decimal number (mean value) ranging from 2 to 24 and preferably from 2 to 10,

- A denotes H, ammonium, Na, K, Li, Mg, Ca or a monoethanolamine or triethano lamine residue.

It is also possible to use mixtures of compounds of formula (1 ), in particular mixtures of compounds containing different groups R1.

The polyoxyalkylenated alkyl (amido) ether carboxylic acids that are particularly pre ferred are those of formula (1 ) in which:

- R1 denotes a Ci2-Ci ₄ alkyl, cocoyl, oleyl, nonylphenyl or octylphenyl radical,

- A denotes a hydrogen or sodium atom, and

- n ranges from 2 to 20, preferably from 2 to 10. Even more preferentially, use is made of compounds of formula (1 ) in which R de notes a Ci2 alkyl radical, A denotes a hydrogen or sodium atom and n ranges from 2 to 10.

Use is preferably made of polyoxyalkylenated (C6-C24)alkyl ether carboxylic acids and salts thereof, polyoxyalkylenated (C6-C24)alkylamido ether carboxylic acids, in particular those including from 2 to 15 alkylene oxide groups, salts thereof, and mix tures thereof.

When the anionic surfactant is in salt form, said salt may be chosen from alkali metal salts, such as the sodium or potassium salt, ammonium salts, amine salts and in particular amino alcohol salts, and alkaline-earth metal salts, such as the magne sium salt.

Examples of amino alcohol salts that may be mentioned include monoethanolamine, diethanolamine and triethanolamine salts, monoisopropanolamine, diisopropanola- mine or triisopropanolamine salts, 2-amino-2-methyl-1 -propanol salts, 2-amino-2- methyl-1 ,3-propanediol salts and tris(hydroxymethyl)aminomethane salts.

Alkali metal or alkaline-earth metal salts and in particular the sodium or magnesium salts are preferably used.

Among the commercial products that may preferably be used are the products sold by the company KAO under the names:

Akypo® NP 70 (Ri = nonylphenyl, n = 7, A = H)

Akypo® NP 40 (Ri = nonylphenyl, n = 4, A = H)

Akypo® OP 40 (Ri = octylphenyl, n = 4, A = H)

Akypo® OP 80 (Ri = octylphenyl, n = 8, A = H)

Akypo® OP 190 (Ri = octylphenyl, n = 19, A = H)

Akypo® RLM 38 (Ri = (Ci2-Ci4)alkyl, n = 4, A = H)

Akypo® RLM 38 NV (Ri = (Ci2-Ci4)alkyl, n = 4, A = Na)

Akypo® RLM 45 CA (Ri = (Ci2-Ci4)alkyl, n = 4.5, A = H)

Akypo® RLM 45 NV (Ri = (Ci2-Ci4)alkyl, n = 4.5, A = Na)

Akypo® RLM 100 (Ri = (Ci2-Ci4)alkyl, n = 10, A = H)

Akypo® RLM 100 NV (Ri = (Ci2-Ci4)alkyl, n = 10, A = Na)

Akypo® RLM 130 (Ri = (Ci2-Ci4)alkyl, n = 13, A = H)

Akypo® RLM 160 NV (Ri = (Ci2-Ci4)alkyl, n = 16, A = Na),

or by the company Sandoz under the names:

Sandopan DTC-Acid (Ri = (Ci3)alkyl, n = 6, A = H)

Sandopan DTC (Ri = (Ci3)alkyl, n = 6, A = Na)

Sandopan LS 24 (Ri = (Ci2-Ci4)alkyl, n = 12, A = Na)

Sandopan JA 36 (Ri = (Ci3)alkyl, n = 18, A = H),

and more particularly the products sold under the following names:

Akypo® RLM 45 (I NCI : Laureth-5 carboxylic acid)

Akypo® RLM 100

Akypo® RLM 38. Polyoxyalkylenated (C6-C24)alkyl ether carboxylic acids and salts thereof are prefer ably used. The composition according to the invention preferably comprises said polyoxy alkylenated alkyl(amido)ether carboxylic acid(s) and/or salts thereof in a total amount ranging from 0.1 % to 30% by weight, preferably from 0.5% to 25% by weight, better still from 1 % to 20% by weight and preferentially from 1.5% to 10% by weight, relative to the total weight of the composition.

Additional non-sulfated anionic surfactants (ii)

As indicated above, the composition according to the invention comprises at least one additional anionic surfactant other than the polyoxyalkylenated alkyl(am- ido)ether carboxylic acids and salts thereof (i) described above. This surfactant is non-sulfated, i.e. it does not comprise any sulfate groups (OSO3H or -OSO3-) in its structure.

Preferably, the additional anionic surfactants (ii) used in the composition according to the invention are chosen from anionic surfactants including in their structure one or more sulfonate and/or phosphate and/or carboxylate groups, preferably sulfonate groups.

The anionic surfactant(s) (ii) may be oxyethylenated and/or oxypropylenated. The total mean number of ethylene oxide (EO) and/or propylene oxide (PO) groups may then range from 1 to 50 and notably from 1 to 10.

Among the carboxylic anionic surfactants (thus surfactants including at least one carboxylic or carboxylate function in their structure) that may be used, mention may be made of: acylglyci nates, acyllactylates, acylsarcosinates, acylglutamates, alkyl- D-galactoside-uronic acids, and also the salts of these compounds; the alkyl and/or acyl groups of these compounds including from 6 to 30 carbon atoms, in particular from 12 to 28, better still from 14 to 24 or even from 16 to 22 carbon atoms; these compounds possibly being polyoxyalkylenated, notably polyoxyethylenated, and then preferably including from 1 to 50 ethylene oxide units, better still from 1 to 10 ethylene oxide units.

Mention may also be made of C6-C24 alkyl monoesters of polyglycoside-polycar- boxylic acids, such as C6-C24 alkyl polyglycoside-citrates, C6-C24 alkyl polyglyco- side-tartrates and C6-C24 alkyl polyglycoside-sulfosuccinates, and salts thereof.

Preferentially, the carboxylic anionic surfactants are chosen, alone or as a mixture, from:

- acylglutamates, notably of C6-C24 or even C12-C20, such as stearoylglutamates, and in particular disodium stearoylglutamate;

- acylsarcosinates, notably of C6-C24 or even C12-C20, such as palmitoylsar- cosinates, and in particular sodium palmitoylsarcosinate;

- acyllactylates, notably of C12-C28 or even C14-C24, such as behenoyllactylates, and in particular sodium behenoyllactylate;

- C6-C24 and notably C12-C20 acylglyci nates;

in particular in the form of alkali metal or alkaline-earth metal, ammonium or amino alcohol salts. Among the sulfonate anionic surfactants (thus surfactants including at least one sul fonate function in their structure) that may be used, mention may be made of: alkyl- sulfonates, alkylamidesulfonates, alkylarylsulfonates, a-olefin sulfonates, paraffin sulfonates, alkylsulfosuccinates, alkyl ether sulfosuccinates, alkylamide sulfosuccin- ates, alkylsulfoacetates, N-acyltaurates, acylisethionates; alkylsulfolaurates; and also the salts of these compounds; the alkyl groups of these compounds including from 6 to 30 carbon atoms, notably from 12 to 28, better still from 14 to 24 or even from 16 to 22 carbon atoms; the aryl group preferably denoting a phenyl or benzyl group; these compounds possibly being polyoxyalkylenated, notably polyoxyethyle- nated, and then preferably including from 1 to 50 ethylene oxide units, better still from 2 to 10 ethylene oxide units.

Preferentially, the sulfonate anionic surfactants are chosen, alone or as a mixture, from:

- C6-C24 and notably C12-C20 olefin sulfonates;

- C6-C24 and notably C12-C20 alkylsulfosuccinates, notably laurylsulfosuccinates;

- C6-C24 and notably C12-C20 alkyl ether sulfosuccinates;

- (C6-C24)acylisethionates and preferably (C12-C18)acylisethionates;

in particular in the form of alkali metal or alkaline-earth metal, ammonium or amino alcohol salts.

When the anionic surfactant is in salt form, said salt may be chosen from alkali metal salts, such as the sodium or potassium salt, ammonium salts, amine salts and in particular amino alcohol salts, and alkaline-earth metal salts, such as the magne sium or calcium salt. Examples of amino alcohol salts that may be mentioned in- elude monoethanolamine, diethanolamine and triethanolamine salts, monoisopro- panolamine, diisopropanolamine or triisopropanolamine salts, 2-amino-2-methyl-1 - propanol salts, 2-amino-2-methyl-1 ,3-propanediol salts and tris(hydroxymethyl)ami- nomethane salts. Alkali metal or alkaline-earth metal salts and in particular the so dium or magnesium salts are preferably used.

Preferentially, the additional anionic surfactants (ii) are chosen, alone or as a mix ture, from:

- C6-C24 and notably C12-C20 olefin sulfonates; - C6-C24 and notably C12-C20 alkylsulfosuccinates, notably laurylsulfosuccinates;

- C6-C24 and notably C12-C20 alkyl ether sulfosuccinates;

- (C6-C24)acylisethionates and preferably (C12-C18)acylisethionates;

- C6-C24 and notably C12-C20 acylsarcosinates; notably palmitoylsarcosinates;

- C6-C24 and notably C12-C20 acylglutamates;

- C6-C24 and notably C12-C20 acylglyci nates;

in particular in the form of alkali metal or alkaline-earth metal, ammonium or amino alcohol salts.

Preferably, the anionic surfactant(s) (ii) are in the form of salts, and in particular alkaline salts, notably sodium salts, ammonium salts, amine salts, including amino alcohol salts, and/or magnesium salts. These salts preferably comprise from 2 to 5 ethylene oxide groups.

Use is more preferably made of C12-C20 olefin sulfonates, such as sodium C14- C16 olefin sulfonates.

The additional non-sulfated anionic surfactant(s) (ii) may be present in the compo sition according to the invention in a total content ranging from 3% to 20% by weight, preferably in a content ranging from 3.5% to 18% by weight, better still from 4% to 15% by weight and even better still from 5% to 10% by weight, relative to the total weight of the composition.

According to a particular embodiment, the total content of anionic surfactants in the composition according to the invention is between 2% and 30% by weight, notably between 3% and 25% by weight, preferably between 4% and 20% by weight, and preferentially between 5% and 15% by weight, relative to the total weight of the composition.

Nonionic surfactants (iii)

As indicated above, the composition comprises one or more nonionic surfactants chosen from alkyl(poly)glycosides.

The composition may also comprise one or more additional (optionnal) non-ionic surfactants, other than the alkyl(poly)glycoside(s).

Preferably, the composition according to the invention comprises one or more nonionic surfactants chosen from alkyl(poly)glycosides represented by the following general formula: R10-(R20)t-(G)v

in which:

- R1 represents a linear or branched alkyl or alkenyl radical including 6 to 24 carbon atoms and notably 8 to 18 carbon atoms, or an alkylphenyl radical of which the linear or branched alkyl radical includes 6 to 24 carbon atoms and notably 8 to 18 carbon atoms, - R2 represents an alkylene radical including 2 to 4 carbon atoms,

- G represents a sugar unit including 5 to 6 carbon atoms,

- 1 denotes a value ranging from 0 to 10 and preferably from 0 to 4,

- v denotes a value ranging from 1 to 15 and preferably from 1 to 4.

Preferably, the alkyl(poly)glycoside surfactants are compounds of the formula de scribed above in which:

- R1 denotes a linear or branched, saturated or unsaturated alkyl radical including from 8 to 18 carbon atoms,

- R2 represents an alkylene radical including 2 to 4 carbon atoms,

- 1 denotes a value ranging from 0 to 3 and preferably equal to 0,

- G denotes glucose, fructose or galactose, preferably glucose,

- the degree of polymerization, i.e. the value of v, possibly ranging from 1 to 15 and preferably from 1 to 4; the mean degree of polymerization more particularly being between 1 and 2.

The glucoside bonds between the sugar units are generally of 1 -6 or 1 -4 type and preferably of 1 -4 type. Preferably, the alkyl(poly)glycoside surfactant is an al- kyl(poly)glucoside surfactant. Cs/C-ie alkyl(poly)glucosides 1 ,4, and notably decyl glucosides and caprylyl/capryl glucosides, are most particularly preferred.

Among the commercial products, mention may be made of the products sold by the company Cognis under the names Plantaren® (600 CS/U, 1200 and 2000) or Plantacare® (818, 1200 and 2000); the products sold by the company SEPPIC un der the names Oramix CG 1 10 and Oramix® NS 10; the products sold by the com pany BASF under the name Lutensol GD 70, or the products sold by the company Chem Y under the name AGI O LK.

Preferably, use is made of Cs/Ci6-alkyl(poly)glycosides 1 ,4, notably as an aqueous 53% solution, such as those sold by Cognis under the reference Plantacare® 818 UP.

Preferentially, the nonionic surfactants are chosen, alone or as a mixture, from (Ce- C24 alkyl)(poly)glycosides, and more particularly (Cs-C-is alkyl)(poly)glycosides.

The composition may also comprise additional nonionic surfactants that could be chosen from:

- alcohols, a-diols and (C1 -20)alkylphenols, these compounds being polyethox- ylated and/or polypropoxylated and/or polyglycerolated, the number of ethylene ox ide and/or propylene oxide groups possibly ranging from 1 to 100, and the number of glycerol groups possibly ranging from 2 to 30; or else these compounds compris ing at least one fatty chain including from 8 to 40 carbon atoms and in particular from 16 to 30 carbon atoms; in particular, oxyethylenated alcohols including at least one saturated or unsaturated, linear or branched C8 to C40 alkyl chain, including from 1 to 100 mol of ethylene oxide, preferably from 2 to 50 and more particularly from 2 to 40 mol of ethylene oxide and including one or two fatty chains;

- condensates of ethylene oxide and propylene oxide with fatty alcohols;

- polyethoxylated fatty amides preferably containing from 2 to 30 ethylene oxide units, polyglycerolated fatty amides including on average from 1 to 5 and in particu lar from 1 .5 to 4 glycerol groups;

- ethoxylated fatty acid esters of sorbitan, preferably containing from 2 to 40 mol of ethylene oxide;

- fatty acid esters of sucrose;

- polyoxyalkylenated, preferably polyoxyethylenated, fatty acid esters containing from 2 to 150 mol of ethylene oxide, including oxyethylenated plant oils;

- N-(C6-24 alkyl)glucamine derivatives;

- amine oxides such as (C10-14 alkyl)amine oxides or N-(C10-14 acyl)aminopropyl- morpholine oxides;

Preferably, the nonionic surfactant(s) are present in the composition according to the invention in a total content ranging from 0.1 % to 15% by weight, preferentially ranging from 0.2% to 10% by weight, in particular ranging from 0.5% to 8% by weight, relative to the total weight of the composition.

Preferably, the nonionic surfactant(s) of alkyl(poly)glycoside type are present in the composition according to the invention in a total content ranging from 0.1 % to 15% by weight, preferentially ranging from 0.2% to 10% by weight, in particular ranging from 0.5% to 8% by weight, relative to the total weight of the composition.

Amphoteric surfactants (iv)

The composition according to the invention also comprises one or more amphoteric surfactants.

In particular, the amphoteric or zwitterionic surfactant(s) are nonsilicone surfactants. They may notably be optionally quaternized secondary or tertiary aliphatic amine derivatives, in which the aliphatic group is a linear or branched chain including from 8 to 22 carbon atoms, said amine derivatives containing at least one anionic group, for instance a carboxylate, sulfonate, sulfate, phosphate or phosphonate group.

Mention may in particular be made of (Cs-C2o)alkylbetaines, (Cs-C2o)alkylsulfobeta- ines, (C8-C2o)alkylamido(C3-C8)alkylbetaines and (C8-C2o)alkylamido(C6-C8)alkyl- sulfobetaines.

Among the optionally quaternized derivatives of secondary or tertiary aliphatic amines that may be used, as defined above, mention may also be made of the com pounds having the respective structures (II) and (III) below:

Ra-CONHCH2CH2-N ⁺ (Rb)(Rc)-CH ₂ COO-, M ⁺ , C (II)

in which:

- R _a represents a C-io to C30 alkyl or alkenyl group derived from an acid RaCOOH preferably present in hydrolyzed coconut kernel oil, or a heptyl, nonyl or undecyl group;

- Rb represents a b-hydroxyethyl group; and - Rc represents a carboxymethyl group;

- M ⁺ represents a cationic counterion derived from an alkali metal or alkaline-earth metal, such as sodium, an ammonium ion or an ion derived from an organic amine; and

- X represents an organic or mineral anionic counterion, such as that chosen from halides, acetates, phosphates, nitrates, (Ci-C ₄ )alkyl sulfates, (Ci-C ₄ )alkyl- or (C-i- C ₄ )alkylarylsulfonates, in particular methyl sulfate and ethyl sulfate; or alternatively M ⁺ and X are absent; Ra-CONHCH ₂ CH2-N(B)(B') (I I I)

in which:

- B represents the group -CH2CH2OX’;

- B’ represents the group -(CH ₂ )zY’, with z = 1 or 2;

- X’ represents the group -CH2COOH, -CH2-COOZ’, -CH2CH2COOH or CH2CH2- COOZ’, or a hydrogen atom;

- V represents the group -COOH, -COOZ’ or -CH2CH(0H)S03H or the group CH ₂ CH(0H)S03-Z';

- Z’ represents a cationic counterion derived from an alkali metal or alkaline-earth metal, such as sodium, an ammonium ion or an ion derived from an organic amine; - Ra’ represents a C10 to C30 alkyl or alkenyl group of an acid Ra -COOH which is preferably present in coconut kernel oil or in hydrolyzed linseed oil, or an alkyl group, notably a C17 group, and its iso form, or an unsaturated C17 group.

These compounds are classified in the CTFA dictionary, 5th edition, 1993, under the names disodium cocoamphodiacetate, disodium lauroamphodiacetate, diso dium caprylamphodiacetate, disodium capryloamphodiacetate, disodium cocoam- phodipropionate, disodium lauroamphodipropionate, disodium caprylamphodipropi- onate, disodium capryloamphodipropionate, lauroamphodipropionic acid and co- coamphodipropionic acid.

By way of example, mention may be made of the cocoamphodiacetate sold by the company Rhodia under the trade name Miranol® C2M Concentrate.

Use may also be made of compounds of formula (IV):

Ra"-NHCH(Y")-(CH2)nCONH(CH2)n-N(Rd)(R _e ) (IV)

in which:

- Y" represents the group -COOH, -COOZ" or -CH2-CH(0H)S03H or the group CH ₂ CH(0H)S03-Z";

Rd and Re, independently of each other, represent a C1 to C ₄ alkyl or hydrox- yalkyl radical;

- Z” represents a cationic counterion derived from an alkali metal or alkaline-earth metal, such as sodium, an ammonium ion or an ion derived from an organic amine;

- Ra- represents a C10 to C30 alkyl or alkenyl group of an acid Ra-COOH which is preferably present in coconut kernel oil or in hydrolyzed linseed oil; - n and n', independently of each other, denote an integer ranging from 1 to 3. Among the compounds of formula (II), mention may be made of the compound clas sified in the CTFA dictionary under the name sodium diethylaminopropyl cocoas- partamide and sold by the company Chimex under the name Chimexane HB.

These compounds may be used alone or as mixtures.

Among the amphoteric or zwitterionic surfactants, use is preferably made of (Cs- C2o)alkylbetaines such as cocoylbetaine, (C8-C2o)alkylamido(C3-C8)alkylbetaines such as cocamidopropylbetaine, and mixtures thereof, and the compounds of for mula (IV) such as the sodium salt of diethylaminopropyl laurylaminosuccinamate (INCI name: sodium diethylaminopropyl cocoaspartamide).

Preferentially, the amphoteric or zwitterionic surfactants are chosen from (Cs-C2o)al- kylamido(C3-C8)alkylbetaines such as cocamidopropyl betaine.

Preferably, the amphoteric surfactant(s) are present in the composition according to the invention in a total content ranging from 3% to 20% by weight, preferentially in a content ranging from 3.5% to 15% by weight and better still from 4% to 10% by weight, relative to the total weight of the composition.

Preferably, the compositions according to the invention have a weight ratio of the total content of amphoteric surfactants (iv) to the total content of non-sulfated ani onic surfactants (ii) other than the polyoxyalkylenated alkyl(amido)ether carboxylic acid anionic surfactants (i) of greater than or equal to 0.5, preferably greater than or equal to 0.6, in particular greater than or equal to 0.8. It may thus be between 0.5 and 3.0, notably between 0.6 and 2.0, and better still between 0.7 and 1 .5.

Cationic or amphoteric polymers

The composition according to the invention also comprises one or more polymers chosen from amphoteric polymers and cationic polymers. It is, needless to say, pos sible to use a mixture of polymers, in particular two different polymers, both chosen from amphoteric polymers and cationic polymers.

For the purposes of the present invention, the term "cationic polymer" means any nonsilicone (not comprising any silicon atoms) polymer containing cationic groups and/or groups that can be ionized into cationic groups and not containing any ani onic groups and/or groups that can be ionized into anionic groups.

For the purposes of the present invention, the term "amphoteric polymer" means any nonsilicone (not comprising any silicon atoms) polymer containing both cationic groups and/or groups that can be ionized into cationic groups and anionic groups and/or groups that can be ionized into anionic groups.

Preferably, the cationic charge density of said polymer(s) is less than or equal to 4 meq/g. The cationic charge density of a polymer corresponds to the number of moles of cationic charges per unit mass of polymer under conditions in which it is totally ion ized. It may be determined by calculation if the structure of the polymer is known, i.e. the structure of the monomers constituting the polymer and their molar propor- tion or weight proportion. It may also be determined experimentally by the Kjeldahl method.

The polymers may be associative or non-associative.

The term "associative polymer" refers to an amphiphilic polymer that is capable, in an aqueous medium, of reversibly combining with itself or with other molecules. It generally includes, in its chemical structure, at least one hydrophilic region or group and at least one hydrophobic region or group. In particular, the hydrophobic group may be a fatty hydrocarbon-based chain such as a linear or branched alkyl, linear or branched arylalkyl or linear or branched alkylaryl group including at least 8 carbon atoms, preferably 8 to 30 carbon atoms, better still from 1 2 to 24 carbon atoms.

The cationic polymers that may be used preferably have a weight-average molar mass (Mw) of between 500 and 5x 1 0 ⁶ approximately and preferably between 10 ³ and 3x 1 0 ⁶ approximately.

Among the cationic polymers, mention may be made more particularly of :

(1 ) homopolymers or copolymers derived from acrylic or methacrylic esters or am ides and including at least one of the units having the following formula:

in which :

- R3, which may be identical or different, denote a hydrogen atom or a CH3 radical ;

- A, which may be identical or different, represent a linear or branched divalent alkyl group of 1 to 6 carbon atoms, preferably 2 or 3 carbon atoms, or a hydroxyalkyl group of 1 to 4 carbon atoms;

- R4, R5 and R6, which may be identical or different, represent an alkyl group con taining from 1 to 1 8 carbon atoms or a benzyl radical, preferably an alkyl group con taining from 1 to 6 carbon atoms;

- R1 and R2, which may be identical or different, represent a hydrogen atom or an alkyl group containing from 1 to 6 carbon atoms, preferably methyl or ethyl;

- X denotes an anion derived from a mineral or organic acid, such as a methosulfate anion or a halide such as chloride or bromide.

The copolymers of family (1 ) may also contain one or more units derived from comonomers that may be chosen from the family of acrylamides, methacrylamides, diacetone acrylamides, acrylamides and methacrylamides substituted on the nitro gen with lower (C1 -C4) alkyls, acrylic or methacrylic acid esters, vinyllactams such as vinylpyrrolidone or vinylcaprolactam, and vinyl esters.

Among these copolymers of family (1 ), mention may be made of:

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

- copolymers of acrylamide and of methacryloyloxyethyltrimethylammonium chlo ride, such as the products sold under the name Bina Quat P 100 by the company Ciba Geigy,

- the copolymer of acrylamide and of methacryloyloxyethyltrimethylammonium methosulfate, such as that sold under the name Reten by the company Hercules,

- quaternized or non-quaternized vinylpyrrolidone/dialkylaminoalkyl acrylate or methacrylate copolymers, such as the products sold under the name Gafquat by the company ISP, for instance Gafquat 734 or Gafquat 755, or alternatively the products known as Copolymer 845, 958 and 937. These polymers are described in detail in French patents 2 077 143 and 2 393 573;

- dimethylaminoethyl methacrylate/vinylcaprolactam/vinylpyrrolidone terpolymers, such as the product sold under the name Gaffix VC 713 by the company ISP,

- vinylpyrrolidone/methacrylamidopropyldimethylamine copolymers, such as the co polymers sold under the name Styleze CC 10 by ISP;

- quaternized vinylpyrrolidone/dimethylaminopropylmethacrylamide copolymers such as the product sold under the name Gafquat HS 100 by the company ISP, - preferably crosslinked polymers of methacryloyloxy(C1 -C4)alkyltri(C1 -C4)al- kylammonium salts, such as the polymers obtained by homopolymerization of dime thylaminoethyl methacrylate quaternized with methyl chloride, or by copolymeriza tion of acrylamide with dimethylaminoethyl methacrylate quaternized with methyl chloride, the homopolymerization or copolymerization being followed by crosslinking with an olefinically unsaturated compound, in particular methylenebisacrylamide. Use may be made more particularly of a crosslinked acrylamide/methacryloyloxy- ethyltrimethylammonium chloride copolymer (20/80 by weight) in the form of a dis persion comprising 50% by weight of said copolymer in mineral oil. This dispersion is sold under the name Salcare® SC 92 by the company Ciba. Use may also be made of a crosslinked methacryloyloxyethyltrimethylammonium chloride homopoly mer comprising approximately 50% by weight of the homopolymer in mineral oil or in a liquid ester. These dispersions are sold under the names Salcare® SC 95 and Salcare® SC 96 by the company Ciba. (2) cationic polysaccharides, notably associative or nonassociative cationic cellu loses and galactomannan gums.

Among the cationic polysaccharides, mention may be made more particularly of cel- lulose ether derivatives including quaternary ammonium groups, cationic cellulose copolymers or cellulose derivatives grafted with a water-soluble quaternary ammo nium monomer and cationic galactomannan gums.

The cellulose ether derivatives including quaternary ammonium groups are notably described in FR 1 492 597, and mention may be made of the polymers sold under the name Ucare Polymer JR (JR 400 LT, JR 125 and JR 30M) or LR (LR 400 and LR 30M) by the company Amerchol. These polymers are also defined in the CTFA dictionary as quaternary ammoniums of hydroxyethylcellulose that have reacted with an epoxide substituted with a trimethylammonium group.

Cationic cellulose copolymers or cellulose derivatives grafted with a water-soluble quaternary ammonium monomer are described in particular in patent US 4 131 576, and mention may be made of hydroxyalkyl celluloses, for instance hydroxymethyl, hydroxyethyl or hydroxypropyl celluloses grafted, in particular, with a methacry- loylethyltrimethylammonium, methacrylamidopropyltrimethylammonium or dime- thyldiallylammonium salt. In particular, mention may be made of Polyquaternium 10. Among the commercial products corresponding to this definition, mention may be made of the products sold under the names Celquat L 200 and Celquat FI 100 by the company National Starch.

Among the cationic polysaccharides, mention may also be made of cationic associ- ative celluloses, or quaternized celluloses derivatives, and in particular quaternized celluloses modified with groups including at least one fatty chain, such as linear or branched alkyl groups, linear or branched arylalkyl groups, linear or branched al- kylaryl groups, preferably linear or branched alkyl groups, these groups including at least 8 carbon atoms, notably from 8 to 30 carbon atoms, better still from 10 to 24 or even from 10 to 14 carbon atoms; or mixtures thereof.

Preferably, mention may be made of quaternized hydroxyethylcelluloses modified with groups including at least one fatty chain, such as linear or branched alkyl groups, linear or branched arylalkyl groups, or linear or branched alkylaryl groups, preferably linear or branched alkyl groups, these groups including at least 8 carbon atoms, notably from 8 to 30 carbon atoms, better still from 10 to 24, or even from 10 to 14, carbon atoms; or mixtures thereof.

Preferentially, mention may be made of the hydroxyethylcelluloses of formula (lb):

in which:

- R represents an ammonium group RaRbRcN+-, Q- in which Ra, Rb and Rc, which may be identical or different, represent a hydrogen atom or a linear or branched C1 - C30 alkyl, and Q- represents an anionic counterion such as a halide, for instance a chloride or bromide; preferably an alkyl;

- R’ represents an ammonium group R’aR’bR’cN+-, Q’- in which R’a, R’b and R’c, which may be identical or different, represent a hydrogen atom or a linear or branched C1 -C30 alkyl, and Q’- represents an anionic counterion such as a halide, for instance a chloride or bromide; preferably an alkyl;

it being understood that at least one of the radicals Ra, Rb, Rc, R'a, R'b and R'c represents a linear or branched C8-C30 alkyl;

- n, x and y, which may be identical or different, represent an integer between 1 and 10 000.

Preferably, in formula (lb), at least one of the radicals Ra, Rb, Rc, R'a, R'b and R'c represents a linear or branched C8-C30, better still C10-C24, or even C10-C14, alkyl; mention may be made in particular of the dodecyl radical (C12). Preferably, the other radical(s) represent a linear or branched C1 -C4 alkyl, notably methyl. Preferably, in formula (lb), only one of the radicals Ra, Rb, Rc, R'a, R'b and R'c represents a linear or branched C8-C30, better still C10-C24, or even C10-C14, alkyl; mention may be made in particular of the dodecyl radical (C12). Preferably, the other radicals represent a linear or branched C1 -C4 alkyl, notably methyl.

Even better still, R may be a group chosen from -N ⁺ (CH3)3, Q'- and - N ⁺ (Ci2H25)(CH3)2, Q'-, preferably an -N ⁺ (CH3)3, Q'- group.

Even better still, R' may be a group -N ⁺ (Ci2H25)(CH3)2, Q' .

The aryl radicals preferably denote phenyl, benzyl, naphthyl or anthryl groups.

Mention may notably be made of the following polymers having the INCI names: - Polyquaternium-24, such as the product Quatrisoft LM 200®, sold by the company

Amerchol/Dow Chemical;

- PG-Hydroxyethylcellulose Cocodimonium Chloride, such as the product Crodacel QM@;

- PG-Hydroxyethylcellulose Lauryldimonium Chloride (C12 alkyl), such as the prod- uct Crodacel QL@; and

- PG-Hydroxyethylcellulose Stearyldimonium Chloride (C18 alkyl), such as the prod uct Crodacel QS®, sold by the company Croda. Mention may also be made of the hydroxyethylcelluloses of formula (lb) in which R represents trimethylammonium halide and R' represents dimethyldodecylammo- nium halide, preferentially R represents trimethylammonium chloride (CH3)3N+-, Cl- and R’ represents dimethyldodecylammonium chloride (CH3)2(C12H25)N+-, CI-. This type of polymer is known under the INCI name Polyquaternium-67; as com mercial products, mention may be made of the Softcat Polymer SL® polymers, such as SL-100, SL-60, SL-30 and SL-5, from the company Amerchol/Dow Chemical.

More particularly, the polymers of formula (lb) are those whose viscosity is between 2000 and 3000 cPs inclusive, preferentially between 2700 and 2800 cPs. Typically, Softcat Polymer SL-5 has a viscosity of 2500 cPs, Softcat Polymer SL-30 has a viscosity of 2700 cPs, Softcat Polymer SL-60 has a viscosity of 2700 cPs and Softcat Polymer SL-100 has a viscosity of 2800 cPs.

Among the cationic galactomannan gums, described more particularly in patents US 3 589 578 and US 4 031 307, mention may be made of guar gums comprising cati onic trialkylammonium groups. Use is made, for example, of guar gums modified with a 2,3-epoxypropyltrimethylammonium salt (for example, a chloride). Such prod ucts are notably sold under the names Jaguar C13 S, Jaguar C 15, Jaguar C 17 and Jaguar C162 by the company Rhodia.

Among the cationic polysaccharides that may be used, mention may also be made of cationic derivatives of cassia gum, notably those including quaternary ammonium groups; in particular, mention may be made of the product having the INCI name Cassia hydroxypropyltrimonium chloride.

(3) polymers constituted of piperazinyl units and of divalent alkylene or hydroxy- alkylene radicals containing linear or branched chains, optionally interrupted with oxygen, sulfur or nitrogen atoms or with aromatic or heterocyclic rings, and also the oxidation and/or quaternization products of these polymers.

(4) water-soluble polyaminoamides prepared in particular by polycondensation of an acidic compound with a polyamine; these polyaminoamides can be crosslinked with an epihalohydrin, a diepoxide, a dianhydride, an unsaturated dianhydride, a bis-unsaturated derivative, a bis-halohydrin, a bis-azetidinium, a bis-haloacyldia- mine, a bis-alkyl halide or alternatively with an oligomer resulting from the reaction of a difunctional compound which is reactive with a bis-halohydrin, a bis-azetidinium, a bis-haloacyldiamine, a bis-alkyl halide, an epihalohydrin, a diepoxide or a bis-un saturated derivative; the crosslinking agent being used in proportions ranging from 0.025 to 0.35 mol per amine group of the polyaminoamide; these polyaminoamides can be alkylated or, if they include one or more tertiary amine functions, they can be quaternized. (5) polyaminoamide derivatives resulting from the condensation of polyalkylene pol yamines with polycarboxylic acids followed by alkylation with difunctional agents. Mention may be made, for example, of adipic acid/dialkylaminohydroxyalkyldial- kylenetriamine polymers in which the alkyl radical includes from 1 to 4 carbon atoms and preferably denotes methyl, ethyl or propyl. Among these derivatives, mention may be made more particularly of the adipic acid/dimethylaminohydroxypropyl/di- ethylenetriamine polymers sold under the name Cartaretine F, F4 or F8 by the com pany Sandoz. (6) polymers obtained by reacting a polyalkylene polyamine including two primary amine groups and at least one secondary amine group with a dicarboxylic acid cho sen from diglycolic acid and saturated aliphatic dicarboxylic acids containing from 3 to 8 carbon atoms; the mole ratio between the polyalkylene polyamine and the di carboxylic acid preferably being between 0.8:1 and 1 .4:1 ; the resulting polyamino- amide being reacted with epichlorohydrin in a mole ratio of epichlorohydrin relative to the secondary amine group of the polyaminoamide preferably of between 0.5:1 and 1 .8:1 . Polymers of this type are sold in particular under the name Flercosett 57 by the company Hercules Inc. or else under the name PD 170 or Delsette 101 by the company Hercules in the case of the adipic acid/epoxypropyl/diethylenetriamine copolymer.

(7) cyclopolymers of alkyldiallylamine or of dialkyldiallylammonium, such as the ho mopolymers or copolymers including, as main constituent of the chain, units corre sponding to formula (I) or (II):

in which

- k and t are equal to 0 or 1 , the sum k + t being equal to 1 ;

- R12 denotes a hydrogen atom or a methyl radical;

- R10 and R1 1 , independently of each other, denote a C1 -C6 alkyl group, a C1 -C5 hydroxyalkyl group, a C1 -C4 amidoalkyl group; or alternatively R10 and R1 1 may denote, together with the nitrogen atom to which they are attached, a heterocyclic group such as piperidyl or morpholinyl; R10 and R1 1 , independently of each other, preferably denote a C1 -C4 alkyl group;

- Y is an anion such as bromide, chloride, acetate, borate, citrate, tartrate, bisulfate, bisulfite, sulfate or phosphate. Mention may be made more particularly of the homopolymer of dimethyldial- lylammonium salts (for example chloride) for example sold under the INCI name Polyquaternium-6, in particular sold under the name Merquat 100, and the copoly mers of diallyldimethylammonium salts (for example chloride) and of acrylamide, for example having the INCI name Polyquaternium-7 and in particular sold under the name Merquat 550 or Merquat 7SPR.

(8) quaternary diammonium polymers comprising repeating units of formula:

in which:

- R13, R14, R15 and R16, which may be identical or different, represent aliphatic, alicyclic or arylaliphatic radicals comprising from 1 to 20 carbon atoms or C1 -C12 hydroxyalkyl aliphatic radicals,

or else R13, R14, R15 and R16, together or separately, form, with the nitrogen at oms to which they are attached, heterocycles optionally comprising a second non nitrogen heteroatom;

or else R13, R14, R15 and R16 represent a linear or branched C1 -C6 alkyl radical substituted with a nitrile, ester, acyl, amide or -CO-0-R17-D or -CO-NH-R17-D group, where R17 is an alkylene and D is a quaternary ammonium group;

- A1 and E31 represent linear or branched, saturated or unsaturated, divalent polymethylene groups comprising from 2 to 20 carbon atoms, which may contain, linked to or intercalated in the main chain, one or more aromatic rings or one or more oxygen or sulfur atoms or sulfoxide, sulfone, disulfide, amino, alkylamino, hy droxyl, quaternary ammonium, ureido, amide or ester groups, and

- X denotes an anion derived from a mineral or organic acid;

it being understood that A1 , R13 and R15 can form, with the two nitrogen atoms to which they are attached, a piperazine ring;

in addition, if A1 denotes a linear or branched, saturated or unsaturated alkylene or hydroxyalkylene radical, E31 may also denote a group (CH2)n-CO-D-OC-(CH2)p- with n and p, which may be identical or different, being integers ranging from 2 to 20, and D denoting:

a) a glycol residue of formula -0-Z-0-, in which Z denotes a linear or branched hydrocarbon-based radical or a group corresponding to one of the follow ing formulae: -(CH2CH20)x-CH2CH2- and -[CH2CH(CH3)0]y-CH2CH(CH3)-, in which x and y denote an integer from 1 to 4, representing a defined and unique degree of polymerization or any number from 1 to 4 representing an average degree of polymerization;

b) a bis-secondary diamine residue, such as a piperazine derivative;

c) a bis-primary diamine residue of formula -NH-Y-NH-, in which Y denotes a linear or branched hydrocarbon-based radical, or else the divalent radical -CH2- CH2-S-S-CH2-CH2-;

d) an ureylene group of formula -NH-CO-NH-.

Preferably, X is an anion, such as chloride or bromide. These polymers have a number-average molar mass (Mn) generally of between 1000 and 100 000.

Mention may be made more particularly of polymers that are constituted of repeating units corresponding to the formula:

in which R1 , R2, R3 and R4, which may be identical or different, denote an alkyl or hydroxyalkyl radical containing from 1 to 4 carbon atoms, n and p are integers rang ing from 2 to 20, and X- is an anion derived from a mineral or organic acid.

A particularly preferred compound of formula (IV) is the one for which R1 , R2, R3 and R4 represent a methyl radical and n = 3, p = 6 and X = Cl, known as Hexadi- methrine chloride according to the INCI (CTFA) nomenclature.

(9) polyquaternary ammonium polymers comprising units of formula (V):

in which:

- R18, R19, R20 and R21 , which may be identical or different, represent a hydrogen atom or a methyl, ethyl, propyl, b-hydroxyethyl, b-hydroxypropyl or - CH2CH2(OCH2CH2)pOH radical, in which p is equal to 0 or to an integer between 1 and 6, with the proviso that R18, R19, R20 and R21 do not simultaneously repre sent a hydrogen atom,

- r and s, which may be identical or different, are integers between 1 and 6,

- q is equal to 0 or to an integer between 1 and 34,

- X- denotes an anion such as a halide,

- A denotes a divalent dihalide radical or preferably represents -CH2-CH2-0-CH2- CH2-.

Examples that may be mentioned include the products Mirapol® A 15, Mirapol® AD1 , Mirapol® AZ1 and Mirapol® 175 sold by the company Miranol.

(10) quaternary polymers of vinylpyrrolidone and of vinylimidazole, for instance the products sold under the names Luviquat® FC 905, FC 550 and FC 370 by the com pany BASF.

(1 1 ) polyamines such as Polyquart® FI sold by Cognis, referred to under the name Polyethylene glycol (1 5) tallow polyamine in the CTFA dictionary.

(12) polymers including in their structure:

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

— CH— CH—

NH ₂ ( ^a )

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

In other words, these polymers may be notably chosen from homopolymers or co- polymers including one or more units derived from vinylamine and optionally one or more units derived from vinylformamide.

Preferably, these cationic polymers are chosen from polymers including, in their structure, from 5 mol% to 1 00 mol% of units corresponding to formula (A) and from 0 to 95 mol% of units corresponding to formula (B), 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).

These polymers may be obtained, for example, by partial hydrolysis of polyvinylfor- mamide. This hydrolysis may take place in acidic or basic medium.

The weight-average molecular weight of said polymer, measured by light scattering, may range from 1000 to 3 000 000 g/mol, preferably from 10 000 to 1 000 000 and more particularly from 100 000 to 500 000 g/mol.

The polymers including units of formula (A) and optionally units of formula (B) are notably sold under the name Lupamin by the company BASF, for instance, in a nonlimiting manner, the products provided under the names Lupamin 9095, Lu- pamin 5095, Lupamin 1095, Lupamin 9030 (or Luviquat 9030) and Lupamin 9010.

Other cationic polymers that may be used in the context of the invention are cationic proteins or cationic protein hydrolyzates, polyalkyleneimines, in particular polyeth- yleneimines, polymers comprising vinylpyridine or vinylpyridinium units, conden sates of polyamines and of epichlorohydrin, quaternary polyureylenes and chitin de rivatives.

Preferably, the cationic polymers are chosen from those of families (1 ), (2), (7) and (10) mentioned above, preferentially from those of families (2) and (7), alone or as a mixture.

The amphoteric polymers may also be chosen from amphoteric polymers compris ing a repetition of:

(i) one or more units derived from a (meth)acrylamide-type monomer,

(ii) one or more units derived from a (meth)acrylamidoalkyltrialkylammonium-type monomer, and

(iii) one or more units derived from a (meth)acrylic acid-type acid monomer.

Preferably, the units derived from a (meth)acrylamide-type monomer are units of structure (la) below:

in which Ri denotes H or CH3 and R2 is chosen from an amino, dimethylamino, tert- butylamino, dodecylamino and -NH-CH2OH radical.

Preferably, said amphoteric polymer comprises a repetition of only one unit of for mula (la).

The unit derived from a monomer of (meth)acrylamide type of formula (la) in which R1 denotes H and R2 is an amino radical (NH2) is particularly preferred. It corre sponds to the acrylamide monomer per se.

Preferably, the units derived from a monomer of (meth)acrylamidoalkyltrialkylammo- nium type are units of structure (lla) below:

in which:

- R3 denotes H or CH3,

- R ₄ denotes a group (CH2)k, with k being an integer ranging from 1 to 6 and prefer ably from 2 to 4;

- R5, Re and R7, which may be identical or different, denote a Ci-C ₄ alkyl,

- Y is an anion such as bromide, chloride, acetate, borate, citrate, tartrate, bisulfate, bisulfite, sulfate or phosphate. Preferably, said amphoteric polymer comprises a repetition of only one unit of for mula (lla).

Among these units derived from a (meth)acrylamidoalkyltrialkylammonium-type monomer of formula (lla), the ones that are preferred are those derived from the methacrylamidopropyltrimethylammonium chloride monomer, for which R3 denotes a methyl radical, k is equal to 3, Rs, Re and R7 denote a methyl radical, and Y denotes a chloride anion.

Preferably, the units derived from a monomer of (meth)acrylic acid type are units of formula (Ilia):

in which Rs denotes H or CH3 and R9 denotes a hydroxyl radical or an -NH-C(CH3)2- CH2-SO3H radical.

The preferred units of formula (Ilia) correspond to the acrylic acid, methacrylic acid and 2-acrylamido-2-methylpropanesulfonic acid monomers.

Preferably, the unit derived from a monomer of (meth)acrylic acid type of formula (Ilia) is the one derived from acrylic acid, for which Rs denotes a hydrogen atom and R9 denotes a hydroxyl radical.

The acidic monomer(s) of (meth)acrylic acid type may be non-neutralized or partially or totally neutralized with an organic or mineral base.

Preferably, said amphoteric polymer comprises a repetition of only one unit of for mula (Ilia). According to a preferred embodiment of the invention, the amphoteric polymer(s) of this type comprise at least 30 mol% of units derived from a monomer of (meth)acrylamide type (i). Preferably, they comprise from 30 mol% to 70 mol% and more preferably from 40 mol% to 60 mol% of units derived from a (meth)acrylamide- type monomer.

The content of units derived from a monomer of (meth)acrylamidoalkyltrialkylammo- nium type (ii) may advantageously be from 10 mol% to 60 mol% and preferentially from 20 mol% to 55 mol%.

The content of units derived from an acidic monomer of (meth)acrylic acid type (iii) may advantageously be from 1 mol% to 20 mol% and preferentially from 5 mol% to 15 mol%.

According to a particularly preferred embodiment of the invention, the amphoteric polymer of this type comprises:

- from 30 mol% to 70 mol%, better still from 40 mol% to 60 mol%, of units derived from a monomer of (meth)acrylamide type (i),

- from 10 mol% to 60 mol%, better still from 20 mol% to 55 mol%, of units derived from a monomer of (meth)acrylamidoalkyltrialkylammonium type (ii), and

- from 1 mol% to 20 mol%, better still from 5 mol% to 15 mol%, of units derived from a monomer of (meth)acrylic acid type (iii).

Amphoteric polymers of this type may also comprise additional units, other than the units derived from a (meth)acrylamide-type monomer, a (meth)acrylamidoalkyltrial- kylammonium-type monomer and a (meth)acrylic acid-type monomer such as de scribed above.

However, according to a preferred embodiment of the invention, said amphoteric polymers are constituted solely of units derived from monomers of (meth)acrylamide type (i), of (meth)acrylamidoalkyltrialkylammonium type (ii) and of (meth)acrylic acid type (iii).

Examples of particularly preferred amphoteric polymers that may be mentioned in clude acrylamide/methacrylamidopropyltrimethylammonium chloride/acrylic acid terpolymers, in particular those having the INCI name: Polyquaternium-53. Corre sponding products are notably sold under the names Merquat 2003 and Merquat 2003 PR by the company Nalco.

As another type of amphoteric polymer that may be used, mention may also be made of copolymers based on (meth)acrylic acid and on a dialkyldiallylammonium salt, such as copolymers of (meth)acrylic acid and of dimethyldiallylammonium chlo ride. An example that may be mentioned is Polyquaternium 22, notably the com mercial product Merquat 280 sold by the company Nalco.

Preferably, the polymer(s) chosen from cationic polymers and/or amphoteric poly mers are chosen, alone or as a mixture, from:

- cationic polysaccharides, preferentially cationic cellulose derivatives, notably cati onic associative celluloses, cationic derivatives of cassia gum, notably those includ ing quaternary ammonium groups;

- homopolymers or copolymers of dimethyldiallylammonium salts, preferentially co polymers of dimethyldiallylammonium salts, such as copolymers of diallyldime- thylammonium salts (for example chloride) and of acrylamide;

- amphoteric polymers comprising:

- from 30 mol% to 70 mol%, better still from 40 mol% to 60 mol%, of units derived from a monomer of (meth)acrylamide type (i),

- from 10 mol% to 60 mol%, better still from 20 mol% to 55 mol%, of units derived from a monomer of (meth)acrylamidoalkyltrialkylammonium type (ii), and

- from 1 mol% to 20 mol%, better still from 5 mol% to 15 mol%, of units de rived from a monomer of (meth)acrylic acid type (iii);

notably chosen from acrylamide/methacrylamidopropyltrimethylammonium chlo ride/acrylic acid; in particular Polyquaternium 53. In a particular embodiment, the composition according to the invention comprises at least:

- one cationic polysaccharide, preferably with a cationic charge density of less than or equal to 4 meq/g, notably chosen from cationic celluloses, cationic galactoman- nan gums and cationic cassia gums; in particular quaternary cellulose ether deriva tives, cassia gum derivatives bearing quaternary ammonium groups; and

- one amphoteric polymer comprising:

- from 30 mol% to 70 mol%, better still from 40 mol% to 60 mol%, of units derived from a monomer of (meth)acrylamide type (i),

- from 10 mol% to 60 mol%, better still from 20 mol% to 55 mol%,of units derived from a monomer of (meth)acrylamidoalkyltrialkylammonium type (ii), and

- from 1 mol% to 20 mol%, better still from 5 mol% to 15 mol%, of units de rived from a monomer of (meth)acrylic acid type (iii);

notably chosen from acrylamide/methacrylamidopropyltrimethylammonium chlo ride/acrylic acid terpolymers; in particular Polyquaternium 53.

In another particular embodiment, the composition according to the invention com prises at least:

- one cationic polysaccharide, preferably with a cationic charge density of less than or equal to 4 meq/g, notably chosen from cationic celluloses, cationic galactoman- nan gums and cationic cassia gums; in particular quaternary cellulose ether deriva tives, cassia gum derivatives bearing quaternary ammonium groups; and

- one homopolymer or copolymer of dimethyldiallylammonium salts, preferentially a copolymer of dimethyldiallylammonium salts, such as copolymers of diallyldime- thylammonium salts (for example chloride) and of acrylamide.

The composition may comprise said cationic and/or amphoteric polymers in a total amount ranging from 0.01 % to 5% by weight relative to the total weight of the com position, preferably from 0.05% to 4% by weight, preferentially from 0.1 % to 3% by weight and better still from 0.2% to 2% by weight, relative to the total weight of the composition.

The composition according to the invention may comprise water or a mixture of wa ter and one or more cosmetically acceptable solvents chosen from Ci-C ₄ alcohols, such as ethanol, isopropanol, tert-butanol or n-butanol; polyols such as glycerol, propylene glycol and polyethylene glycols; and mixtures thereof.

Preferably, the composition according to the invention has a total water content of between 50% and 95% by weight, preferably 60% and 90% by weight, even better still between 65% and 85% by weight relative to the total weight of the composition.

The pH of the compositions according to the invention generally ranges from 3.0 to 9.0, preferably from 3.5 to 7.0, preferentially from 4.0 to 6.0 and better still from 4.5 to 5.5. The composition according to the invention may also comprise one or more conven tional additives that are well known in the art, such as natural or synthetic thickeners or viscosity regulators; C12-C30 fatty alcohols; ceramides; C12-C32 fatty esters such as isopropyl myristate, myristyl myristate, cetyl palmitate and stearyl stearate; min eral, plant or synthetic oils; vitamins or provitamins; nonionic or anionic polymers; pH stabilizers, preserving agents; dyes; fragrances; agents for preventing hair loss, antiseborrheic agents, antidandruff agents.

A person skilled in the art will take care to select the optional additives and the amount thereof such that they do not harm the properties of the compositions of the present invention.

These additives are generally 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.

Advantageously, the composition according to the invention does not comprise any silicone (0%).

The compositions in accordance with the invention may be used as shampoos for washing and/or conditioning the hair; they are preferably applied in this case to damp hair in amounts that are effective for washing it; the lather generated by mas saging or rubbing with the hands may then be removed, after an optional leave-on time, by rinsing with water, the operation possibly being repeated one or more times. Process and use according to the invention

Another subject of the present invention relates to a cosmetic treatment process, preferably a hair treatment process, notably for washing and/or conditioning keratin materials, in particular human keratin fibers such as the hair, comprising the appli cation to said materials of a composition as defined above, followed by an optional leave-on time and/or rinsing and/or drying.

The composition may be applied to dry or wet hair, and preferably to wet or damp hair.

According to one embodiment, the process consists in applying to keratin fibers an effective amount of the composition according to the invention, optionally massag- ing the fibers, optionally leaving the composition to stand on the fibers, and rinsing. The leave-on time of the composition on the keratin fibers may be between a few seconds and 15 minutes and preferably between 30 seconds and 5 minutes. The composition is generally rinsed out with water.

An optional step of drying the keratin fibers may be performed.

The present invention also relates to the use of the composition according to the invention as described previously, for the cosmetic treatment of, notably for washing and/or conditioning, keratin materials, in particular human keratin fibers such as the hair.

The examples that follow serve to illustrate the invention without, however, being limiting in nature.

Example 1

The cosmetic compositions (A) and (B) according to the invention and the compar ative composition are prepared from the ingredients shown in the table below, the amounts of which are expressed as weight percentages of active material (AM).

The compositions according to the invention may be used as shampoos.

It is found that compositions A and B according to the invention give the head of hair good properties in terms of disentangling, a smooth feel and visual smoothness, suppleness and coating of the fiber.

Example 2

The cosmetic compositions C and D according to the invention are prepared from the ingredients shown in the table below, the amounts of which are expressed as weight percentages of active material (AM).

The compositions according to the invention may be used as shampoos.

It is found that these compositions give the head of hair good properties in terms of disentangling, a smooth feel and visual smoothness, suppleness and coating of the fiber.