PROCESS FOR PREPARING A SHAMPOO FROM AN ANHYDROUS SOLID COMPOSITION OF SURFACTANTS

Abstract

The present invention relates to a process for preparing a composition for washing keratin materials, in particular human keratin fibers such as hair, comprising mixing an anhydrous solid composition comprising one or more anionic surfactants and one or more amphoteric or zwitterionic surfactants with water, then stirring and leaving the aqueous composition resulting from this mixture to stand.

Description

Title of the invention: PROCESS FOR PREPARING A SHAMPOO FROM AN ANHYDROUS SOLID COMPOSITION OF SURFACTANTS

[0001] The present invention relates to a process for preparing a composition for washing keratin materials, in particular human keratin fibers such as hair, comprising mixing an anhydrous solid composition comprising one or more anionic surfactants and one or more amphoteric or zwitterionic surfactants with water, then stirring and leaving the aqueous composition resulting from this mixture to stand.

[0002] In the field of hair hygiene, products for washing and / or caring for keratin fibres are mostly, if not all, packaged in plastic-based packaging, for example in the form of a plastic bottle or a non-biodegradable plastic bag.

[0003] To date, the cosmetics sector is dependent on these plastic-based packagings which are rarely recycled or difficult to recycle, and solutions to free ourselves from them are rare.

[0004] Packaging based on paper or biodegradable materials for aqueous compositions for washing and / or caring for keratin fibers is not entirely satisfactory. Indeed, this type of packaging can disintegrate in the presence of water, which does not allow these compositions to be stored, nor does it allow good stability to be maintained over time.

[0005] However, in the interests of preserving the environment, consumers are increasingly paying attention to the plastic footprint of their purchases and are demanding cosmetic products packaged without plastic or petrochemical materials, and in smaller packaging.

[0006] Furthermore, always with a view to preserving the environment, consumers are also concerned about the carbon footprint of their purchases, that is to say the quantity of carbon dioxide generated from the production of the cosmetic product to its use, including the distribution of the product.

[0007] There is therefore a real need to develop processes for preparing cosmetic products with a plastic footprint and a carbon footprint lower than those of conventional preparation processes. In particular, there is a real need to develop processes for preparing washing compositions capable of reducing the generation of carbon dioxide throughout the life of the product, as well as obtaining washing compositions giving keratin materials Unique in its good performance in use, particularly in terms of washing power, flexibility, feel, softness, shine and detangling of keratin fibers.

[0008] These aims are achieved with the present invention which in particular relates to a process for preparing a composition for washing keratin materials, comprising: (i) at least one mixing step: a. of an anhydrous solid composition (A) comprising: - one or more anionic surfactants, and - one or more amphoteric or zwitterionic surfactants, b. with a composition (B) comprising water, the weight ratio of the total content of composition (A) to the total content of composition (B) ranging from 0.01 to 0.5; then (ii) at least one step of stirring the aqueous composition (C) resulting from said mixture; then (iii) at least one step consisting of leaving the aqueous composition (C) to stand for at least 2 hours before its use on keratin materials.

[0009] The method according to the invention allows the user to prepare at home a ready-to-use aqueous composition for washing keratin materials, for example a shampoo, by mixing the anhydrous solid composition (A) with an aqueous composition (B) in a bottle, for example a glass bottle.

[0010] The anhydrous solid composition (A) has the advantage of being able to be packaged in non-plastic packaging, for example in paper, biodegradable or metal bags, and also of being packaged in smaller packaging than a conventional shampoo.

[0011] The anhydrous solid composition (A) also has the advantage of having a reduced weight and volume, compared to a conventional aqueous washing composition, for example a 250 ml shampoo packaged in a polyethylene terephthalate bottle. In other words, for a unit of anhydrous solid composition, equivalent to a unit of aqueous washing composition once reformulated with water or to 250 ml of conventional shampoo, the weight and volume of the anhydrous solid composition are lower.

[0012] These reductions in weight and volume per unit of anhydrous solid composition (A) make it possible to significantly reduce the quantity of carbon dioxide generated during the transport of the compositions (A) from the production plant to the distribution points, or even to the homes of consumers.

[0013] Indeed, the reduction in volume per composition unit (A) makes it possible to deliver more with the same means of transport (for example a truck or an airplane), and thus reduce the amount of carbon dioxide generated, relative to each unit of composition (A).

[0014] In the same way, the reduction of the weight per unit of composition (A) makes it possible to reduce the total weight of the delivery for the same means of transport (for example a truck or an airplane), and therefore the quantity of combustible energy necessary for the delivery (for example gasoline or kerosene), and thus reduce the quantity of carbon dioxide generated, relative to each unit of composition (A).

[0015] It has also been found that the ready-to-use aqueous washing compositions thus obtained have good washing power and provide flexibility, a good feel, softness, shine and facilitate the disentangling of keratin fibers.

[0016] Advantageously, the ready-to-use aqueous washing compositions thus obtained are transparent.

[0017] The invention also relates to a process for treating keratin materials comprising the application to said keratin materials of the composition obtained by the preparation process according to the invention.

[0018] Other objects, characteristics, aspects and advantages of the invention will appear even more clearly on reading the description and the example which follows.

[0019] In this description, and unless otherwise indicated:

[0020] - the expression "at least one" is equivalent to the expression "one or more" and can be substituted for it;

[0021] - the expression "between" is equivalent to the expression "ranging from" and can be substituted, and implies that the terminals are included;

[0022] - By the expression “greater than” and respectively the expression “less than” to the meaning of the present invention, it is understood to mean a strictly upper, respectively strictly lower open interval, and therefore that the limits are not included.

[0023] - By "keratin materials" according to the present application, we mean more particularly primarily keratin fibers, more preferably human keratin fibers, and even more preferably hair.

[0024] The anhydrous solid composition (A)

[0025] The preparation process according to the invention comprises at least one step of mixing an anhydrous solid composition (A) with an aqueous composition (B).

[0026] Composition (A) is solid at room temperature (25°C) and at atmospheric pressure (1,013.105 Pa).

[0027] Composition (A) is anhydrous.

[0028] By "anhydrous composition" is meant a composition comprising a water content of less than 5% by weight, preferably less than 3% by weight, relative to the weight of the composition. Preferably, this water content is less than 1% by weight, better still less than 0.5%, or even less than 0.3% by weight, relative to the weight of the composition. More specifically, it does not include water (0%).

[0029] In particular, the anhydrous solid composition (A) does not include water added during its preparation, any residual water possibly present being able to come from the raw materials used during the preparation.

[0030] The anhydrous solid composition (A) may be in the form of powder, paste, particles (for example spherical particles such as small beads or granules), compressed tablet, stick or loaf. Preferably, the composition (A) is in the form of powder or particles; and more preferably in the form of powder.

[0031] By "powder" is meant a composition in powder form, preferably essentially free of dust (or fine particles). In other words, the particle size distribution of the particles is such that the weight ratio of particles which have a size less than or equal to 50 micrometers (fines ratio), preferably less than or equal to 45 micrometers (fines ratio), is advantageously less than or equal to 5% by weight, preferably less than 3% by weight and more particularly less than 1% by weight, relative to the total weight of the particles (particle size evaluated using a RETSCH AS 200 DIGIT granulometer; Oscillation height: 1.25 mm / sieving time: 5 minutes). Advantageously, the size of the powder particles is between 5 μm and 3 mm, preferably between 10 μm and 2 mm, more preferably between 50 μm and 1 mm, and better still between 60 μm and 600 μm.

[0032] By "paste" is meant a composition having a viscosity greater than 5 poises (500 mPa.s) and preferably greater than 10 poises (1000 mPa.s), measured at 25°C and at a shear rate of 1s 1; this viscosity can be determined using a Coneplan rheometer.

[0033] By “particles” is meant small fractionated objects formed of solid particles aggregated together, of variable shapes and sizes. They may be of regular or irregular shape. They may in particular be spherical (such as granules, pellets, balls), square, rectangular, or elongated such as rods. Spherical particles are particularly preferred. The size of the particles may advantageously be, in its largest dimension, between 5 μm and 5 mm, preferably between 10 μm and 2 mm, more preferably between 50 μm and 100 μm and better still between 60 μm and 600 μm.

[0034] When the anhydrous solid composition (A) is not in the form of powder or particles, it preferably has a penetration force at 25°C and 1 atm (1,013.105 Pa) of greater than or equal to 200 g, in particular greater than or equal to 300 g, or even 400 g, better still 500 g. The penetration force is determined by penetrometry. Texture analysis measurements are carried out at 25°C using a tex- Stable Micro Systems TA.XT Plus turometer. Penetrometry experiments are carried out with a metal rod fitted with a screwed tip, said tip being a 2mm P / 2N needle for the upper part, connected to the measuring head. The piston is pushed into the sample at a constant speed of 1 mm / s, to a height of 5 mm. The force exerted on the piston is recorded and the average value of the force is calculated.

[0035] The anhydrous solid composition (A) may be in the form of a compressed anhydrous solid composition, in particular using a manual or mechanical press.

[0036] The density of the anhydrous solid composition (A) is preferably between 0.1 and 1, more preferably between 0.2 and 0.8, and better still between 0.3 and 0.6.

[0037] As an example, the density can be measured according to the following method. A determined quantity (mass, m) of powder is placed in a graduated cylinder. Of 250 mL. The powder contained in the cylinder will then undergo 2,500 compressions and obtain the volume (v) occupied by the powder. The volume (v) thus obtained is read on the cylinder and the density (d) is then determined according to the formula d=m / v.

[0038] Anionic surfactants

[0039] The anhydrous solid composition (A) comprises one or more anionic surfactants.

[0040] Anionic surfactant is understood to mean a surfactant comprising, as ionic or ionizable groups, only anionic groups.

[0041] In the present description, an entity is described as being "anionic" when it has at least one permanent negative charge or when it can be ionized into a negatively charged entity, under the conditions of use of the composition of the invention (medium, pH for example) and not comprising a cationic charge.

[0042] The anionic surfactants can be chosen from sulfate, sulfonate and carboxylic (or carboxylate) surfactants. A mixture of these surfactants can of course be used.

[0043] It is understood in this description that: - the carboxylate anionic surfactants comprise at least one carboxylic or carboxylate function (-COOH or -COO), and may optionally also comprise one or more sulfate and / or sulfonate functions; - the anionic sulfonate surfactants comprise at least one sulfonate function (-SO3H or -SO3), and may optionally further comprise one or more sulfate functions, but do not comprise a carboxylate function; and - anionic sulfate surfactants comprise at least one sulfate function but do not comprise a carboxylate or sulfonate function.

[0044] The carboxylate anionic surfactants that can be used therefore comprise at least one carboxylic or carboxylate function (-COOH or -COO).

[0045] The carboxylate anionic surfactants may be chosen from the following compounds: acylglycinates, acyllactylates, acylsarcosinates, acylglutamates; alkyl-D-galactoside-uronic acids, alkyl ether carboxylic acids, alkyl (C6-C30 aryl) ether carboxylic acids, alkyl amidoether carboxylic acids; as well as the salts of these compounds; and mixtures thereof; the alkyl and / or acyl groups of these compounds comprising from 6 to 30 carbon atoms, in particular from 12 to 28, even better from 14 to 24, or even from 16 to 22, carbon atoms; the aryl group preferably denoting a phenyl or benzyl group; these compounds may be polyoxyalkylenated, in particular polyoxyethylenated and then preferably comprising from 1 to 50 ethylene oxide units, better still from 2 to 10 ethylene oxide units.

[0046] It is also possible to use C6-C24 alkyl monoesters of polyglycoside polycarboxylic acids such as C6-C24 alkyl polyglycoside citrates, C6-C24 alkyl polyglycoside tartrates and C6-C24 alkyl polyglycoside sulfosuccinates, and their salts.

[0047] Preferably, the carboxylate anionic surfactants are chosen from, alone or as a mixture: - acylglutamates, particularly C6-C24, or even C12-C20, such as stearoylglutamates, and in particular disodium stearoylglutamate; - acylsarcosinates, particularly C6-C24, or even C12-C20, such as palmitoyl sarcosinates, and in particular sodium palmitoyl sarcosinate; - acyllactylates, particularly Ci2-C28, or even Ci4-C24, such as behenoyl lactylates, and in particular sodium behenoyllactylate; - C6-C24 acylglycinates, especially C12-C20; - alkyl(C6-C24)ethercarboxylates, and in particular alkyl(C12-C20)ethercarboxylates; - polyoxyalkylenated alkyl(C6-C24) (amido) ether carboxylic acids, in particular those containing from 2 to 50 ethylene oxide groups; in particular in the form of salts of alkali or alkaline earth metals, ammonium, or amino alcohol.

[0048] Among the above carboxylic surfactants, mention may be made in particular of sarcosinate type surfactants, notably chosen from the alkyl(C6-C3o)sarcosinates of the following formula (I): RC(O)-N(CH3)-CH2-C(O)-OX (I) with - X denoting a hydrogen atom, an ammonium ion, an ion derived from an alkali or alkali-earth metal or an ion derived from an organic amine, preferably a hydrogen atom, and - R denoting a linear or branched alkyl group, from 5 to 29 carbon atoms. R preferably denotes a linear or branched alkyl group, from 8 to 24 carbon atoms, preferably from 12 to 20 carbon atoms.

[0049] Among the alkyl(C6-C30)sarcosinates of formula (I) which may be used in the present composition, mention may be made of palmitoylsarcosinates, stearoylsarcosinates, myristoyl-sarcosinates, lauroylsarcosinates, and cocoylsarcosinates, in acid form or in salified form.

[0050] The anionic surfactant(s) of sarcosinate type are advantageously chosen from sodium lauroyl sarcosinate, stearoyl sarcosine, myristoyl sarcosine, and mixtures thereof, preferably from stearoyl sarcosine, myristoyl sarcosine, and mixtures thereof.

[0051] Among the above carboxylic surfactants, mention may also be made of polyoxyalkylenated alkyl(amido)ether carboxylic acids and their salts, in particular those comprising from 2 to 50 alkylene oxide groups, in particular ethylene oxide groups, such as the compounds proposed by the company KAO under the names AKYPO.

[0052] The polyoxyalkylenated alkyl(amido)ether carboxylic acids that can be used are preferably chosen from those of formula (II): Rl-(OC2H4)n-OCH2COOA (II) in which: - RI represents a linear or branched C6-C24 alkyl or alkenyl radical, an alkyl(C8-C9)phenyl radical, an R2CONH-CH2-CH2- radical with R2 denoting a linear or branched C9-C2i alkyl or alkenyl radical; preferably RI is a C8-C20, preferably C8-C18, alkyl radical, and aryl preferably denotes phenyl, - n is an integer or decimal number (average value) ranging from 2 to 24, preferably from 2 to 10, - A denotes H, ammonium, Na, K, Li, Mg or a monoethanolamine or triethanolamine residue.

[0053] Mixtures of compounds of formula (II) may also be used, in particular mixtures of compounds having different RI groups.

[0054] The particularly preferred polyoxyalkylenated alkyl(amido)ether carboxylic acids are those of formula (II) in which: - RI denotes a C12-C14 alkyl, cocoyl, oleyl, nonylphenyl or oc-tylphenyl radical, - A denotes a hydrogen or sodium atom, and - n varies from 2 to 20, preferably 2 to 10.

[0055] More preferably still, compounds of formula (II) are used in which RI denotes a C12 alkyl radical, A denotes a hydrogen or sodium atom and n varies from 2 to 10.

[0056] The anionic sulfonate surfactants that can be used comprise at least one sulfonate function (-SO3H or -SO3).

[0057] The anionic sulfonate surfactants may be chosen from the following compounds: alkylsulfonates, alkylamidesulfonates, alkylarylsulfonates, alpha-olefin-sulfonates, paraffin-sulfonates, alkylsulfosuccinates, alkylethersulfosuccinates, alkylamidesulfosuccinates, alkylsulfoacetates, N-acyltaurates, acylisethionates, alkylsulfolaurates, as well as the salts of these compounds; the alkyl groups of these compounds comprising from 6 to 30 carbon atoms, in particular from 12 to 28, even better from 14 to 24, or even from 16 to 22, carbon atoms; the aryl group preferably denoting a phenyl or benzyl group; these compounds may be polyoxyalkylenated, in particular polyoxyethylenated and then preferably comprising from 1 to 50 ethylene oxide units, better still from 2 to 10 ethylene oxide units.

[0058] Preferably, the anionic sulfonate surfactants are chosen from, alone or as a mixture: - C6-C24 alkylsulfosuccinates, especially C12-C20, especially laurylsulfosuccinates. - C6-C24 alkyl ether sulfosuccinates, in particular C12-C20; - N-acyltaurates in C6-C24, in particular in C12-C20 - (C6-C24)acylisethionates, preferably (Ci2-Ci8)acylisethionates, in particular in the form of alkali or alkaline earth metal, ammonium or amino alcohol salts.

[0059] Preferably, the anionic surfactant(s) of sulfonate type are chosen from C6-C24, in particular C12-C20, N-acyltaurates, and in particular N-acyl N-methyltaurates, C6-C24, in particular C12-C18, acyl isethionates, as well as their salts and their mixtures.

[0060] More preferably, the anionic surfactant(s) of sulfonate type are chosen from C6-C24, in particular C12-C18, acyl isethionates, as well as their salts and their mixtures.

[0061] The anionic sulfate surfactants that can be used comprise at least one sulfate function (-OSO3H or -OSO3).

[0062] The anionic sulfate surfactants can be chosen from the following compounds: alkyl sulfates, alkyl ether sulfates, alkylamido ether sulfates, alkyl-laryl polyether sulfates, monoglyceride sulfates; as well as the salts of these compounds; the alkyl groups of these compounds containing from 6 to 30 carbon atoms, in particular from 8 to 28, even better from 10 to 24, or even from 12 to 22, carbon atoms; the aryl group preferably designating a phenyl or benzyl group; these compounds may be (poly)oxyalkylenated, in particular (poly)oxyethylenated and then preferably comprising from 1 to 50 ethylene oxide units, better still from 1 to 10 ethylene oxide units.

[0063] Preferably, the anionic sulfate surfactants are chosen from, alone or as a mixture: - alkyl sulfates, particularly C10-C24, or even C12-C22, - alkyl ether sulfates, in particular C10-C24, or even C12-C22, preferably comprising from 1 to 20 ethylene oxide units; in particular in the form of salts of alkali or alkaline earth metals, ammonium, or amino alcohol.

[0064] 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 magnesium salt.

[0065] Examples of amino alcohol salts include mono-, di- and triethanolamine salts, mono-, di- or triisopropanolamine salts, 2-amino 2-methyl 1-propanol, 2-amino 2-methyl 1,3-propanediol and tris(hydroxymethyl)amino methane salts.

[0066] Preferably, salts of alkali or alkaline earth metals are used, and in particular sodium or magnesium salts.

[0067] Advantageously, the anionic surfactant(s) are chosen from sulfate anionic surfactants.

[0068] More preferably, the anionic surfactant(s) are chosen from alkyl sulfates, alkyl ether sulfates, alkylamido ether sulfates, alkylaryl polyether sulfates, monoglyceride sulfates; as well as the salts of these compounds; the alkyl groups of these compounds comprising from 6 to 30 carbon atoms, in particular from 8 to 28, even better from 10 to 24, or even from 12 to 22, carbon atoms; the aryl group preferably denoting a phenyl or benzyl group; these compounds may be (poly)oxyalkylenated, in particular (poly)oxyethylenated and then preferably comprising from 1 to 50 ethylene oxide units, better still from 1 to 10 ethylene oxide units.

[0069] More preferably still, the anionic surfactant(s) are chosen from: - C6-C30 alkyl sulfates, better still C8-C24, even better C10-C24, or even C12-C22 - C6-C24 alkyl ether sulfates, better still C10-C24, or even C12-C22, preferably comprising from 1 to 20 ethylene oxide units, - and their mixtures; in particular in the form of salts of alkali or alkaline earth metals, ammonium, or amino alcohol.

[0070] More preferably still, the anionic surfactant(s) are chosen from C6-C30 alkyl sulfates, better still C8-C24, even better still C10-C24, or even C12-C22.

[0071] Preferably, the anhydrous solid composition (A) comprises at least two anionic surfactants, preferably at least two sulfate anionic surfactants, more preferably at least two C6-C30 alkyl sulfates, better still C8-C24, even better still C10-C24, or even C12-C22.

[0072] Preferably, the total content of anionic surfactant(s) present in the anhydrous solid composition (A) ranges from 55 to 90% by weight, more preferably from 56 to 85% by weight, even more preferably from 57 to 80% by weight, better still from 60 to 75% by weight, relative to the total weight of the anhydrous solid composition (A).

[0073] Preferably, the total content of anionic sulfate surfactant(s) present in the anhydrous solid composition (A) ranges from 55 to 90% by weight, more preferably from 56 to 85% by weight, even more preferably from 57 to 80% by weight, better still from 60 to 75% by weight, relative to the total weight of the anhydrous solid composition (A).

[0074] Preferably, the total content of C6-C30 alkyl sulfates present in the anhydrous solid composition (A) ranges from 55 to 90% by weight, more preferably from 56 to 85% by weight, even more preferably from 57 to 80% by weight, better still from 60 to 75% by weight, relative to the total weight of the anhydrous solid composition (A).

[0075] Amphoteric or zwitterionic surfactants

[0076] The anhydrous solid composition (A) comprises one or more amphoteric or zwitterionic surfactants.

[0077] In particular, the amphoteric or zwitterionic surfactant(s), preferably non-silicone, used in the anhydrous solid composition (A), may in particular be secondary or tertiary aliphatic amine derivatives, optionally quaternized, in which the aliphatic group is a linear or branched chain comprising from 8 to 22 carbon atoms, said amine derivatives containing at least one anionic group such as, for example, a carboxylate, sulfonate, sulfate, phosphate or phosphonate group.

[0078] Mention may in particular be made of alkyl(C8-C20)betaines, alkyl(C8-C20)sulfobetaines, alkyl(C8-C20)amidoalkyl(Ci-C6)betaines, alkyl(C8-C20)amidalkyl(Ci-C6)sulfobetaines, and mixtures thereof.

[0079] Among the derivatives of secondary or tertiary aliphatic amines, optionally quaternized, which can be used, as defined above, mention may also be made of the compounds of the following respective structures (III) and (IV): Ra-CONHCH2CH2-N+(Rb)(Rc)-CH2COO, M+, X (III) formula (III), in which: - Ra represents a C10 to C30 alkyl or alkenyl group derived from an acid RaCOOH, preferably present in hydrolyzed coconut oil, preferably Ra represents a heptyl, nonyl or undecyl group; - Rb represents a beta-hydroxyethyl group; - Rc represents a carboxymethyl group; - M+ represents a cationic counterion derived from an alkali metal, alkaline earth metal, such as sodium, an ammonium ion or an ion derived from an organic amine; and - X represents an organic or inorganic anionic counterion, such as that chosen from halides, acetates, phosphates, nitrates, alkyl(Ci-C4)sulfates, alkyl(Ci-C4)- or alkyl(Ci-C4)aryl-sulfonates, in particular methylsulfate and ethylsulfate; or else M+ and X are absent; Ra'-CONHCH2CH2-N(B)(B') (IV) formula (IV), in which: - B represents the group -CH2CH2OX'; - B' represents the group -(CH2)ZY', with z = 1 or 2; - X' represents the group -CH2COOH, -CH2-COOZ', -CH2CH2COOH, CH2CH2 -COOZ', or a hydrogen atom; - Y' represents the group -COOH, -COOZ', -CH2CH(OH)SO3H or the group CH2 CH(OH)SO3-Z'; - Z' represents a cationic counterion derived from an alkali 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 Ra'-COOH acid preferably present in coconut oil or in hydrolyzed linseed oil, preferably Ra' an alkyl group, in particular Cp and its iso form, an unsaturated Cp group.

[0080] These compounds are classified in the CTFA dictionary, 5th edition, 1993, under the names disodium cocoamphodiacetate, disodium lauroamphodiacetate, disodium caprylamphodiacetate, disodium capryloamphodiacetate, disodium cocoampho-dipropionate, disodium lauroamphodipropionate, disodium caprylampho-propionate, disodium capryloamphodipropionate, lauroamphodi-propionic acid, cocoamphodipropionic acid.

[0081] As an example, mention may be made of cocoamphodiacetate marketed by the company RHODIA under the trade name MIRANOL® C2M concentrate.

[0082] It is also possible to use compounds of formula (V): Ra”-NHCH(Y”)-(CH2)nCONH(CH2)nN(Rd)(Re) (V) formula (V), in which: - Y” represents the group -COOH, -COOZ”, -CH2-CH(OH)SO3H or the group CH2 CH(OH)SO3-Z” ; - Rd and Re, independently of each other, represent a C1 to C4 alkyl or hydroxyalkyl radical; - Z” represents a cationic counterion derived from an alkali 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 Ra”-COOH acid preferably present in coconut oil or in hydrolyzed linseed oil; and - n and n', independently of each other, denotes an integer ranging from 1 to 3.

[0083] Among the compounds of formula (V) we can cite the compound classified in the CTFA dictionary under the name sodium diethylaminopropyl cocoaspartamide and marketed by the company CHIMEX under the name CHIMEXANE HB.

[0084] These compounds can be used alone or in mixtures.

[0085] Among the amphoteric or zwitterionic surfactants mentioned above, advantageously used are alkyl(C8-C20)betaines, such as cocobetaine, alkyl(C8-C20)amidoalkyl(C3-C8)betaines, such as cocamidopropylbetaine, alkyl(C8-C20)amphoacetates, alkyl(C8-C20)amphodiacetates and mixtures thereof.

[0086] More preferably, the amphoteric or zwitterionic surfactant(s) are chosen from alkyl(C8-C20)betaines, alkyl(C8-C20)amidoalkyl(C3-C8)betaines and mixtures thereof; even more preferably from cocobetaine, cocamidopropylbetaine, and mixtures thereof.

[0087] Even better, the amphoteric or zwitterionic surfactant(s) are chosen from alkyl(C8-C2o)amidoalkyl(C3-C8)betaines, and very particularly cocamidopropylbetaine.

[0088] Preferably, the total content of amphoteric or zwitterionic surfactant(s) present in the anhydrous solid composition (A) ranges from 5 to 40% by weight, more preferably from 6 to 35% by weight, even more preferably from 7 to 30% by weight, better still from 8 to 20% by weight, relative to the total weight of the anhydrous solid composition (A).

[0089] Preferably, the total content of alkyl(C8-C20)betaine(s) and alkyl(C8-C20)amidoalkyl(C3-C8)betaine(s) present in the anhydrous solid composition (A) ranges from 5 to 40% by weight, more preferably from 6 to 35% by weight, even more preferably from 7 to 30% by weight, better still from 8 to 20% by weight, relative to the total weight of the anhydrous solid composition (A).

[0090] Preferably, the total content of alkyl(C8-C20)amidoalkyl(C3-C8)betaine(s), such as cocamidopropylbetaine, present in the anhydrous solid composition (A) ranges from 5 to 40% by weight, more preferably from 6 to 35% by weight, even more preferably from 7 to 30% by weight, better still from 8 to 20% by weight, relative to the total weight of the anhydrous solid composition (A).

[0091] Advantageously, the total content of surfactants present in the anhydrous solid composition (A) is greater than or equal to 60% by weight, preferably ranging from 60 to 95% by weight, more preferably from 65 to 90% by weight, even more preferably from 70 to 85% by weight, relative to the total weight of the anhydrous solid composition (A).

[0092] Preferably, the total content of anionic surfactant(s) and amphoteric or zwitterionic surfactant(s) present in the anhydrous solid composition (A) is greater than or equal to 60% by weight, more preferably ranging from 60 to 95% by weight, more preferably still from 65 to 90% by weight, and even better still from 70 to 85% by weight, relative to the total weight of the anhydrous solid composition (A).

[0093] Preferably, the total content of anionic sulfate surfactant(s) and amphoteric or zwitterionic surfactant(s) present in the anhydrous solid composition (A) is greater than or equal to 60% by weight, more preferably ranging from 60 to 95% by weight, more preferably still from 65 to 90% by weight, and even better still from 70 to 85% by weight, relative to the total weight of the anhydrous solid composition (A).

[0094] Preferably, the total content of C6-C3o alkyl sulfates and of alkyl(C8-C2o)betaine(s) and alkyl(C8-C20)amidoalkyl(C3-C8)betaine(s) present in the anhydrous solid composition (A) is greater than or equal to 60% by weight, more preferably ranging from 60 to 95% by weight, more preferably still from 65 to 90% by weight, and even better still from 70 to 85% by weight, relative to the total weight of the anhydrous solid composition (A).

[0095] Anti-caking agents

[0096] Preferably, the anhydrous solid composition (A) further comprises one or more anti-caking agents.

[0097] For the purposes of the invention, the term "anti-caking agent" means a compound making it possible to reduce, or even prevent, the agglomeration of solid particles and / or powders, to reduce adhesion, and / or to improve the flow of solid particles and / or powders by reducing friction and cohesion between them.

[0098] Preferably, the anti-caking agent(s) are chosen from C8-C32 fatty acid salts, tricalcium phosphate, calcium silicate, magnesium silicate, magnesium carbonate, silicon dioxide, talc, silica, sodium stearoyl fumarate, tetrasodium pyrophosphate, and mixtures thereof.

[0099] The fatty acid salts which can be used according to the present invention advantageously comprise from 10 to 20 carbon atoms, more preferably from 12 to 18 carbon atoms.

[0100] These are more particularly the salts of fatty acids chosen from caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, and mixtures thereof, such as cocoate salts.

[0101] The fatty acid salts may be chosen from alkali metal, alkaline earth metal, or amine salts. The salt may be chosen from sodium salts, potassium, calcium, magnesium, ammonium, diethanolamine, triethanolamine, triiso-propanolamine.

[0102] Examples of C8-C32 fatty acid salts include: - sodium or potassium caprate, - sodium or potassium caprylate, - sodium or potassium or magnesium or calcium or ammonium or triethanolamine laurate, - sodium or potassium or magnesium or calcium or diethanolamine or triethanolamine or triisopropanolamine myristate, - sodium or potassium or magnesium or triethanolamine palmitate, - sodium or potassium or magnesium or triethanolamine cocoate, - sodium or potassium or magnesium or calcium or ammonium or diethanolamine or triethanolamine stearate, - sodium or potassium or ammonium oleate, - sodium arachidate, - sodium or potassium or calcium behenate.

[0103] Advantageously, a monocarboxylic acid salt is used, preferably saturated, having from 8 to 32 carbon atoms, more preferably from 10 to 20 carbon atoms, such as those described above.

[0104] Preferably, the fatty acid salt(s) containing from 8 to 32 carbon atoms are chosen from stearic acid salts; more preferably from alkali metal and alkaline earth metal salts of stearic acid, and mixtures thereof.

[0105] It is understood within the meaning of the present invention that said C8-C32 fatty acid salts are different from the anionic surfactant(s) (i) present in the composition according to the invention.

[0106] More preferably, the anti-caking agent(s) are chosen from C8-C32 fatty acid salts, better still C10-C20, even better still C12-C18; even more preferably still from alkali metal and alkaline earth metal salts of stearic acid, and mixtures thereof; and even better still magnesium stearate.

[0107] Preferably, when the anti-caking agent(s) are present in the anhydrous solid composition (A), the total content of anti-caking agent(s) ranges from 0.01 to 20% by weight, more preferably from 0.1 to 15% by weight, even more preferably from 0.5 to 10% by weight, better still from 1 to 8% by weight, relative to the total weight of the anhydrous solid composition (A).

[0108] Preferably, when the C8-C32 fatty acid salt(s) are present in the anhydrous solid composition (A), the total content of C8-C32 fatty acid salt(s) ranges from 0.01 to 20% by weight, more preferably from 0.1 to 15% by weight, even more preferably from 0.5 to 10% by weight, better still from 1 to 8% by weight, relative to the total weight of the anhydrous solid composition (A).

[0109] Preferably, when magnesium stearate is present in the anhydrous solid composition (A), the total magnesium stearate content ranges from 0.01 to 20% by weight, more preferably from 0.1 to 15% by weight, even more preferably from 0.5 to 10% by weight, better still from 1 to 8% by weight, relative to the total weight of the anhydrous solid composition (A).

[0110] Cationic polymers

[0111] Preferably, the anhydrous solid composition (A) further comprises one or more cationic polymers.

[0112] For the purposes of the present invention, the expression "cationic polymer" designates any non-silicone polymer (not comprising a silicon atom) containing cationic groups and / or groups ionizable into cationic groups, and not containing anionic groups and / or groups ionizable into anionic groups.

[0113] Cationic polymers are not silicone-based (do not include a Si-O unit).

[0114] Cationic polymers may or may not be associative.

[0115] The cationic polymers that can be used preferably have a weight-average molar mass (Mw) of between 500 and 5.106 approximately, preferably of between 103 and 3.106 approximately.

[0116] Among the cationic polymers, we can cite more particularly:

[0117] (1) homopolymers or copolymers derived from acrylic esters or amides or methacrylic and comprising at least one of the units of the following formula: formulas in which: - R3, identical or different, denote a hydrogen atom or a CH3 radical; - A, identical or different, represent a divalent alkyl group, linear or branched, 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, identical or different, represent an alkyl group having from 1 to 18 carbon atoms or a benzyl radical; preferably an alkyl group having from 1 to 6 carbon atoms; - R1 and R2, identical or different, represent a hydrogen atom or an alkyl group having from 1 to 6 carbon atoms, preferably methyl or ethyl; and - X denotes an anion derived from a mineral or organic acid such as a methosulfate anion or a halide such as chloride or bromide.

[0118] The copolymers of family (1) may also contain one or more units derived from comonomers which may be chosen from the family of acrylamides, methacrylamides, diacetone acrylamides, acrylamides and methacrylamides substituted on the nitrogen by lower alkyls (C1-C4), acrylic or methacrylic acids or their esters, vinyllactams such as vinylpyrrolidone or vinylcaprolactam, vinyl esters.

[0119] Among these copolymers of family (1), we can cite: - copolymers of acrylamide and quaternized dimethylaminoethyl methacrylate dimethyl sulfate or with a dimethyl halide, such as that sold under the name HERCOFLOC by the company HERCULES, - copolymers of acrylamide and methacryloyloxyethyltrimethylammonium chloride, such as those sold under the name BINA QU AT P 100 by the company CIBA GEIGY, - the copolymer of acrylamide and methacryloyloxyethyltrimethylammonium methosulfate, such as that sold under the name RETEN by the company HERCULES, - vinylpyrrolidone / dialkylaminoalkyl acrylate or methacrylate copolymers, quaternized or not, such as the products sold under the name "GAFQUAT" by the company ISP such as for example "GAFQUAT 734" or "GAFQUAT 755" or the products called "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 those marketed under the name STYLEZE CC 10 by ISP; - vinylpyrrolidone / quatemized dimethylaminopropyl methacrylamide copolymers, such as the product sold under the name "GAFQUAT HS 100" by the company ISP, - polymers, preferably crosslinked, of methacryloyloxyalkyl(Ci-C4)trialkyl(Ci-C4)ammonium salts such as polymers obtained by homopolymerization of dimethylaminoethylmethacrylate quaternized with methyl chloride, or by copolymerization of acrylamide with dimethylaminoethylmethacrylate quaternized with methyl chloride, the homo- or copolymerization being followed by crosslinking with an olefinically unsaturated compound, in particular methylene bisacrylamide. It is more particularly possible to use a crosslinked acrylamide / methacryloyloxyethyltrimethylammonium chloride copolymer (20 / 80 by weight) in the form of a dispersion comprising 50% by weight of said copolymer in mineral oil. This dispersion is marketed under the name "SALCARE® SC 92" by the company CIBA.A crosslinked homopolymer of methacryloyloxyethyl trimethylammonium chloride comprising about 50% by weight of the homopolymer in mineral oil or in a liquid ester can also be used. These dispersions are marketed under the names "SALCARE® SC 95" and "SALCARE® SC 96" by the company CIBA.

[0120] (2) Cationic polysaccharides, in particular celluloses and ga- cationic lactomannans. Among the cationic polysaccharides, we can cite more particularly cellulose ether derivatives containing groups quaternary ammonium, cationic cellulose copolymers or cellulose derivatives grafted with a water-soluble quaternary ammonium monomer and cationic galactomannan gums.

[0121] Cellulose ether derivatives comprising quaternary ammonium groups are described in particular in FR1492597, and mention may be made of the polymers marketed under the name "UCARE POLYMER JR" (JR 400 LT, JR 125, JR 30M) or "LR" (LR 400, LR 30M) by the company AMERCHOL. These polymers are also defined in the CTFA dictionary as quaternary ammoniums of hydroxyethylcellulose having reacted with an epoxide substituted by a trimethylammonium group, such as for example polyquatemium-10.

[0122] Cationic cellulose copolymers or cellulose derivatives grafted with a water-soluble quaternary ammonium monomer are described in particular in patent US4131576, and mention may be made of hydroxyalkylcelluloses, such as hydroxymethyl-, hydroxyethyl- or hydroxypropyl celluloses grafted in particular with a salt of methacryloylethyl trimethylammonium, methacrylamidopropyl trimethylammonium, dimethyl-diallylammonium, such as for example polyquatemium-4. The marketed products meeting this definition are more particularly the products sold under the name "Celquat L 200" and "Celquat H 100" by the National Starch Company.

[0123] Among the cationic cellulose derivatives, it is also possible to use cationic associative celluloses, which can be chosen from quaternized cellulose derivatives, and in particular quaternized celluloses modified by groups comprising at least one fatty chain, such as linear or branched alkyl, linear or branched arylalkyl, linear or branched alkylaryl, preferably linear or branched alkyl, these groups comprising at least 8 carbon atoms, in particular from 8 to 30 carbon atoms, better still from 10 to 24, or even from 10 to 14, carbon atoms; or mixtures thereof.

[0124] Preferably, mention may be made of quaternized hydroxyethylcelluloses modified by groups comprising at least one fatty chain, such as linear or branched alkyl, linear or branched arylalkyl, linear or branched alkylaryl, preferably linear or branched alkyl, these groups comprising at least 8 carbon atoms, in particular from 8 to 30 carbon atoms, better still from 10 to 24, or even from 10 to 14, carbon atoms; or mixtures thereof.

[0125] Preferably, mention may be made of hydroxyethylcelluloses of formula (Ib):

[0126]

[0127] in which:

[0128] - R represents an ammonium group RaRbRcN+-, Q in which Ra, Rb, Rc, identical or different represent a hydrogen atom or a linear or branched alkyl, C1 to C30, preferably an alkyl, and Q represents an anionic counterion such as a halide such as a chloride or bromide;

[0129] - R' represents an ammonium group R'aR'bR'cN+-, Q' in which R'a, R'b, R'c, identical or different, represent a hydrogen atom or a linear or branched alkyl, C1 to C30, preferably an alkyl, and Q' represents an anionic counterion such as a halide such as a chloride or bromide;

[0130] it being understood that at least one of the radicals Ra, Rb, Rc, R'a, R'b, R'c represents a linear or branched alkyl, C8 to C30;

[0131] - n, x and y, identical or different, represent an integer between 1 and 10,000.

[0132] Preferably, in formula (Ib), at least one of the radicals Ra, Rb, Rc, R'a, R'b, R'c represents a linear or branched alkyl, C8 to C30; better still C10 to C24, or even C10 to C14; mention may in particular be made of the dodecyl radical (C12). Preferably, the other radical(s) represent a linear or branched alkyl, C1 to C4, in particular methyl.

[0133] Preferably, in formula (Ib), only one of the radicals Ra, Rb, Rc, R'a, R'b, R'c represents a linear or branched alkyl, C8 to C30; better still C10 to C24, or even C10 to C50; in particular, mention may be made of the dodecyl radical (C12). Preferably, the other radicals represent a linear or branched alkyl, C1 to C4, in particular methyl.

[0134] Even better, R may be a group chosen from -N+(CH3)3, Q' and -N+(Ci2H25)(CH3)2, Q', preferably a group -N+(CH3)3, Q'.

[0135] Even better, R' can be a group -N+(Ci2H25)(CH3)2, Q'.

[0136] The aryl radicals preferably denote the phenyl, benzyl, naphthyl or anthryl groups.

[0137] We can notably cite the polymers with INCI names: - Polyquatemium-24, such as the product QUATRISOFT LM 200®, marketed by the company AMERCHOL / DOW CHEMICAL; - PG-Hydroxyethylcellulose Cocodimonium Chloride, such as the product CRODACEL QM®; - PG-Hydroxyethylcellulose Lauryldimonium Chloride (Ci2 alkyl), such as the product CRODACEL QL® and - PG-Hydroxyethylcellulose Stearyldimonium Chloride (C[8] alkyl) such as the product CRODACEL QS®, marketed by the company CRODA.

[0138] Mention may also be made of hydroxyethylcelluloses of formula (Ib) in which R represents trimethylammonium halide and R' represents dimethyldodecylammonium halide, preferably R represents trimethylammonium chloride Cl ,(CH3)3N+- and R' represents dimethyldodecylammonium chloride Cl ,(CH3)2(C12H25)N+-. This type of polymer is known under the INCI name Poly-quatemium-67; as commercial products, mention may be made of SOFTCAT POLYMER SL® polymers such as SL-100, SL-60, SL-30 and SL-5 from the company AMERCHOL / DOW CHEMICAL.

[0139] More particularly, the polymers of formula (Ib) are, for example, those whose viscosity is inclusively between 2000 and 3000 cPs, preferably 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. SOFTCAT POLYMER SX-1300X with a viscosity of between 1000 and 2000 cPs can also be used.

[0140] Cationic galactomannan gums are described more particularly in patents US3589578 and US4031307, and mention may be made of guar gums comprising cationic trialkylammonium groups. For example, guar gums modified with a salt (for example a chloride) of 2,3-epoxypropyl trimethylammonium are used. Such products are marketed in particular under the names JAGUAR C13 S, JAGUAR C 15, JAGUAR C 17 or JAGUAR C162 or JAGUAR EXCEL by the company RHODIA. Such compounds have the INCI names guar hydroxypropyltrimonium chloride or hydroxypropyl guar hydroxypropyltrimonium chloride.

[0141] (3) polymers consisting of piperazinyl units and divalent alkylene radicals or hydroxyalkylene with linear or branched chains, optionally interrupted by oxygen, sulfur, nitrogen atoms or by aromatic or heterocyclic rings, as well as the oxidation and / or quaternization products of these polymers.

[0142] (4) water-soluble polyaminoamides, prepared in particular by polycon densification of an acidic compound with a polyamine; these polyaminoamides can be crosslinked by an epihalohydrin, a diepoxide, a dianhydride, an unsaturated dianhydride, a bis-unsaturated derivative, a bis-halohydrin, a bis-azetidinium, a bis-haloacyldiamine, an alkyl bis-halide or by an oligomer resulting from the reaction of a bifunctional compound reactive with respect to a bis-halohydrin, a bis- azetidinium, a bis-haloacyldiamine, an alkyl bis-halide, an epihalohydrin, a diepoxide or a bis-unsaturated derivative; the crosslinking agent being used in proportions ranging from 0.025 to 0.35 mole per amine group of the polyaminoamide; these polyaminoamides can be alkylated or, if they contain one or more tertiary amine functions, quaternized.

[0143] (5) polyaminoamide derivatives resulting from the condensation of polyalkylenes polyamines with polycarboxylic acids followed by alkylation by bifunctional agents. Examples include adipic acid-diacoylaminohydroxyalkyldialoylene triamine polymers in which the alkyl radical contains 1 to 4 carbon atoms and preferably denotes methyl, ethyl, propyl. Among these derivatives, mention may be made more particularly of the adipic acid / dimethylaminohydroxypropyl / diethylene triamine polymers sold under the name "Cartaretine F, F4 or F8" by the company Sandoz.

[0144] (6) polymers obtained by reaction of a polyalkylene polyamine comprising two primary amine groups and at least one secondary amine group with a dicarboxylic acid chosen from diglycolic acid and saturated aliphatic dicarboxylic acids having from 3 to 8 carbon atoms; the molar ratio between the polyalkylene polyamine and the dicarboxylic acid preferably being between 0.8:1 and 1.4:1; the resulting polyaminoamide being reacted with epichlorohydrin in a molar ratio of epichlorohydrin relative to the secondary amine group of the polyaminoamide preferably between 0.5:1 and 1.8:1. Polymers of this type are in particular marketed under the name "Hercosett 57" by the company Hercules Inc. or under the name "PD 170" or "Delsette 101" by the company Hercules in the case of the adipic acid / epoxypropyl / diethylene-triamine copolymer.

[0145] (7) alkyl diallyl amine or dialkyl diallyl ammonium cyclopolymers such as homopolymers or copolymers comprising as the main constituent of the chain units corresponding to formulas (VI) or (VII): ---- CR.. C(R^>CH2- -(CH.1F--CR~ ri ' ii H2c^ H2C , (VI) N+ y. (VII) H - Laughs formulas (VI) and (VII), in which: - k and t are equal to 0 or 1, the sum k + t being equal to 1; - Rn denotes a hydrogen atom or a methyl radical; - R10 and R11b, independently of each other, denote an alkyl group having from 1 to 6 carbon atoms, a hydroxyalkyl group in which the alkyl group has from 1 to 5 carbon atoms, a C1 to C4 amidoalkyl group; or R10 and Ru may denote, together with the nitrogen atom to which they are attached, heterocyclic groups, such as piperidinyl or morpholinyl; R10 and Ru, independently of each other, preferably denote an alkyl group having from 1 to 4 carbon atoms; and - Y is an anion such as bromide, chloride, acetate, borate, citrate, tartrate, bisulfate, bisulfite, sulfate, phosphate.

[0146] Mention may be made more particularly of the homopolymer of salts (for example chloride) of dimethyldiallylammonium, for example sold under the name "MERQUAT 100" by the company NALCO (and their counterparts with low weight-average molar masses) and the copolymers of salts (for example chloride) of diallyldimethylammonium and acrylamide sold in particular under the name "MERQUAT 550" or "MERQUAT 7SPR".

[0147] (8) quaternary diammonium polymers comprising recurring units of formula: R13 R^ II ---N + - A, - N +- B -- ATII) ] : , t R^ x~ RtsX' formula (VIII), in which: - Rn, Ru, Rb and Ri6, which may be identical or different, represent aliphatic, alicyclic or arylaliphatic radicals comprising from 1 to 20 carbon atoms or lower hydroxyalkylaliphatic radicals, or Rn, RM, R[5 and R[6, together or separately, constitute with the nitrogen atoms to which they are attached heterocycles optionally comprising a second heteroatom other than nitrogen or Rn, Ru, Ris and Ri6 represent a linear or branched C1 to C6 alkyl radical substituted by a nitrile, ester, acyl, amide or -CO-O-Rp-D or -CO-NH-R17-D group where R 17 is an alkylene and D a quaternary ammonium group; - Ai and Bi represent divalent polymethylene groups comprising from 2 to 20 carbon atoms which may be linear or branched, saturated or unsaturated, and 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, hydroxyl, quaternary ammonium, ureido, amide or ester groups, and - X denotes an anion derived from a mineral or organic acid; it being understood that Ab Rn and Ri5 can form with the two nitrogen atoms to which they are attached a piperazine ring; furthermore, if Ai denotes a linear or branched, saturated or unsaturated alkylene or hydroxyalkylene radical, Bi can also denote a group (CH2)n-CO-D-OC-(CH2)n- in which D denotes: (a) a glycol residue of formula -OZO-, where Z denotes a linear or branched hydrocarbon radical or a group corresponding to one of the following formulae: -(CH2 -CH2-O)X-CH2-CH2- and -[CH2-CH(CH3)-O]y-CH2-CH(CH3)- where 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-, where Y denotes a linear or branched hydrocarbon radical, or the divalent radical -CH2-CH2-SS-CH2-CH2-; Or d) a ureylene group of formula: -NH-CO-NH-.

[0148] Preferably, X is an anion such as chloride or bromide. These polymers have a number-average molar mass (Mn) generally between 1000 and 100000.

[0149] We can cite more particularly polymers which are made up of recurring units corresponding to the formula: R., ^3 -N-(CH4 —' I y / ” J, X-'" (B) r. n, formula (IX) in which Rh R2, R3 and R4, identical or different, denote an alkyl or hydroxyalkyl radical having from 1 to 4 carbon atoms approximately, n and p are whole numbers varying from 2 to 20 approximately and, X is an anion derived from a mineral or organic acid.

[0150] A particularly preferred compound of formula (IX) is that for which Rh R2, R3 and R4 represent a methyl radical, n=3, p=6 and X = Cl, called Hexadimethrine chloride according to the INCI nomenclature (CTFA).

[0151] (9) quaternary polyammonium polymers comprising units of formula (X): Rc i; r — N+ - (CH A- NH - CO - (CH J - CO - NH ■ (CH A - N+ - A — X- i ' z“ I ^3 x _ formula (X), in which: - R18, R19, R20 and R2i, identical or different, represent a hydrogen atom or a methyl, ethyl, propyl, [3-hydroxyethyl, [3-hydroxypropyl or -CH2CH2 (OCH2CH2)POH radical, where p is equal to 0 or to an integer between 1 and 6, provided that R[8, R19, R20 and R2[ do not simultaneously represent a hydrogen atom, - r and s, identical or different, are whole numbers 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, and - A denotes a radical of a dihalide or preferably represents -CH2-CH2-O-CH2 -CH2-,

[0152] Examples include the products "Mirapol® A 15", "Mirapol® ADI", "Mirapol® AZ1" and "Mirapol® 175" sold by the company Miranol.

[0153] (10) Quaternary polymers of vinylpyrrolidone and vinylimidazole such as for example, products marketed under the names Luviquat® FC 905, FC 550 and FC 370 by the company BASF

[0154] (11) Polyamines such as Polyquart® H sold by COGNIS, referenced under the name of "POLYETHYLENEGLYCOL (15) TALLOW POLYAMINE" in the CTFA dictionary.

[0155] (12) polymers comprising in their structure: (a) one or more patterns corresponding to the following formula (A): —CH — CH— ' 1 (b) optionally one or more patterns corresponding to the following formula (B): —GH — CH — " | (8) HH—C—H II O

[0156] In other words, these polymers can be chosen in particular from homo- or copolymers comprising one or more units derived from vinylamine and optionally one or more units derived from vinylformamide.

[0157] (13) and mixtures thereof.

[0158] Preferably, these cationic polymers are chosen from polymers comprising, in their structure, from 5 to 100 mol% of units corresponding to formula (A) and from 0 to 95 mol% of units corresponding to formula (B), preferably from 10 to 100 mol% of units corresponding to formula (A) and from 0 to 90 mol% of units corresponding to formula (B).

[0159] These polymers can be obtained for example by partial hydrolysis of polyvinylformamide. This hydrolysis can be carried out in an acidic or basic medium.

[0160] The weight-average molecular mass of said polymer, measured by light diffraction, may preferably vary from 1,000 to 3,000,000 g / mol, more preferably from 10,000 to 1,000,000 and more particularly still from 100,000 to 500,000 g / mol.

[0161] The cationic charge density of these polymers can preferably vary from 2 meq / g to 20 meq / g, more preferably from 2.5 to 15 and more particularly from 3.5 to 10 meq / g.

[0162] The polymers comprising units of formula (A) and optionally units of formula (B) are notably sold under the name LUPAMIN by the company BASF, such as, for example, and in a non-limiting manner, the products offered under the names LUPAMIN 9095, LUPAMIN 5095, LUPAMIN 1095, LUPAMIN 9030 (or LUVIQUAT 9030) and LUPAMIN 9010.

[0163] Preferably, the cationic polymer(s) are chosen from cationic polysaccharides.

[0164] More preferably, the cationic polymer(s) are chosen from cellulose ether derivatives comprising quaternary ammonium groups, cationic cellulose copolymers, cellulose derivatives grafted with a water-soluble quaternary ammonium monomer, cationic galactomannan gums, and mixtures thereof.

[0165] More preferably still, the cationic polymer(s) are chosen from cationic galactomannan gums, quaternary ammonium polymers of hydroxyethylcellulose having reacted with an epoxide substituted by a trimethylammonium group, and mixtures thereof.

[0166] Most particularly preferably, the cationic polymer(s) are chosen from cationic guar gums, polyquarnium-10, and mixtures thereof.

[0167] Preferably, when the cationic polymer(s) are present in the anhydrous solid composition (A), the total content of cationic polymer(s) ranges from 0.1 to 20% by weight, more preferably from 0.5 to 15% by weight, more preferably still from 1 to 10% by weight, even better still from 2 to 5% by weight, relative to the total weight of the anhydrous solid composition (A).

[0168] Preferably, when the cationic polysaccharide(s) are present in the anhydrous solid composition (A), the total content of cationic polysaccharide(s) ranges from 0.1 to 20% by weight, more preferably from 0.5 to 15% by weight, more preferably still from 1 to 10% by weight, even better still from 2 to 5% by weight, relative to the total weight of the anhydrous solid composition (A).

[0169] Preferably, when the cationic galactomannan gum(s) and / or the hydroxyethylcellulose quaternary ammonium polymer(s) having reacted with an epoxide substituted by a trimethylammonium group are present in the anhydrous solid composition (A), the total content of cationic galactomannan gum(s) and of hydroxyethylcellulose quaternary ammonium polymer(s) having reacted with an epoxide substituted by a trimethylammonium group ranges from 0.1 to 20% by weight, more preferably from 0.5 to 15% by weight, more preferably still from 1 to 10% by weight, even better still from 2 to 5% by weight, relative to the total weight of the anhydrous solid composition (A).

[0170] Non-ionic surfactants

[0171] The anhydrous solid composition (A) may optionally further comprise one or more non-ionic surfactants.

[0172] The non-ionic surfactants which can be used according to the invention can be chosen from: - alcohols, alpha-diols and alkyl(Ci-C2o)phenols, these compounds being polyethoxylated and / or polypropoxylated and / or polyglycerolated, the number of ethylene oxide and / or propylene oxide groups being able to range from 1 to 100, and the number of glycerol groups being able to range from 2 to 30; and / or these compounds comprising at least one fatty chain comprising from 8 to 40 carbon atoms, in particular from 10 to 20 carbon atoms; in particular alcohols comprising at least one C8 to C40 alkyl chain, saturated or unsaturated, linear or branched, oxyethylenated and / or oxypropylenated comprising from 1 to 100 moles of ethylene oxide and / or propylene oxide, preferably from 2 to 50, more particularly from 2 to 40 moles of ethylene oxide and / or propylene oxide; - condensates of ethylene oxide and propylene oxide on fatty alcohols; - polyethoxylated fatty amides preferably having from 2 to 30 ethylene oxide units, polyglycerolated fatty amides comprising on average from 1 to 5 glycerol groups and in particular from 1.5 to 4; - ethoxylated sorbitan fatty acid esters preferably having from 2 to 40 ethylene oxide units; - sucrose fatty acid esters; - polyoxyalkylenated fatty acid esters, preferably polyoxyethylenated, having from 2 to 150 moles of ethylene oxide, including oxyethylenated vegetable oils; - N-(C6-C24 alkyl)glucamine derivatives, - amine oxides such as (C10-C14 alkyl)amine oxides or N-(C10-C14 acyl)aminopropylmorpholine oxides; - and their mixtures.

[0173] Mention may also be made of non-ionic surfactants of the alkyl(poly)glycoside type, in particular represented by the following general formula: R^-^OHGX in which: - Ri represents a linear or branched alkyl or alkenyl radical containing 6 to 24 carbon atoms, in particular 8 to 18 carbon atoms, or an alkylphenyl radical whose linear or branched alkyl radical contains 6 to 24 carbon atoms, in particular 8 to 18 carbon atoms; - R2 represents an alkylene radical containing 2 to 4 carbon atoms, - G represents a sugar unit containing 5 to 6 carbon atoms, -1 denotes a value ranging from 0 to 10, preferably from 0 to 4, - v denotes a value ranging from 1 to 15, preferably from 1 to 4.

[0174] Preferably, the alkyl(poly)glycoside surfactants are compounds of the formula described above in which: - Ri denotes a saturated or unsaturated, linear or branched alkyl radical containing from 8 to 18 carbon atoms, - R2 represents an alkylene radical containing 2 to 4 carbon atoms, -1 denotes a value ranging from 0 to 3, preferably equal to 0, - G denotes glucose, fructose or galactose, preferably glucose; - the degree of polymerization, that is to say the value of v, which can range from 1 to 15, preferably from 1 to 4; the average degree of polymerization being more particularly between 1 and 2.

[0175] The glucosidic bonds between the sugar units are generally of the 1-6 or 1-4 type, preferably of the 1-4 type. Preferably, the alkyl(poly)glycoside surfactant is an alkyl(poly)glucoside surfactant. Particularly preferred are C8 / C16 alkyl-1,4-(poly)glucosides, and in particular decylglucosides and caprylyl / capryl glucosides.

[0176] Among the commercial products, we can cite 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 under the names ORAMIX CG 110 and ORAMIX® NS 10; the products sold by the company BASF under the name LUTENSOL GD 70 or the products sold by the company CHEM Y under the name AGIO LK.

[0177] Preferably, C8 / Ci6-alkyl (poly)glycoside 1,4 are used, in particular in 53% aqueous solution, such as those marketed by COGNIS under the reference PLANTACARE® 818 UP.

[0178] Preferably, the non-ionic surfactant(s) are chosen from oxyalkylenated fatty alcohols comprising at least one C8 to C40 alkyl chain, saturated or unsaturated, linear or branched, and comprising a number of ethylene oxide and / or propylene oxide groups ranging from 1 to 100; more preferably chosen from alcohols oxyethylenated and oxypropylenated fatty acids comprising at least one C8 to C20 alkyl chain, better still C10 to C[8, saturated or unsaturated, linear or branched, and comprising a number of ethylene oxide and propylene oxide groups ranging from 2 to 50, better still from 2 to 40, such as PPG-5-Ceteth-20.

[0179] Preferably, when the non-ionic surfactant(s) are present in the anhydrous solid composition (A), the total content of non-ionic surfactant(s) ranges from 0.1 to 15% by weight, more preferably from 0.5 to 10% by weight, even more preferably from 1 to 5% by weight, relative to the total weight of the anhydrous solid composition (A).

[0180] Preferably, when the oxyalkylenated fatty alcohol(s) are present in the anhydrous solid composition (A), the total content of oxyalkylenated fatty alcohol(s) ranges from 0.1 to 15% by weight, more preferably from 0.5 to 10% by weight, even more preferably from 1 to 5% by weight, relative to the total weight of the anhydrous solid composition (A).

[0181] The anhydrous solid composition may optionally also comprise one or more silicones, preferably chosen from amino silicones; in particular in a content ranging from 0.01 to 10% by weight, more preferably from 0.1 to 7% by weight, even more preferably from 0.5 to 5% by weight, relative to the total weight of the anhydrous solid composition.

[0182] By "silicone" is meant all organosilicon polymers or oligomers with a linear or cyclic, branched or crosslinked structure, of variable molecular weight, obtained by polymerization and / or by polycondensation of suitably functionalized silanes, and consisting essentially of a repetition of main units in which the silicon atoms are linked together by oxygen atoms (siloxane bond -Si-O-Si-), optionally substituted hydrocarbon radicals being directly linked via a carbon atom to said silicon atoms; and more particularly dialkylsiloxane polymers, amino silicones, dimethiconols.

[0183] The term “amino silicone” means any silicone comprising at least one primary, secondary, tertiary amine or a quaternary ammonium group.

[0184] The anhydrous solid composition (A) may also contain additives usually used in cosmetics, such as, for example, preservatives, perfumes and colorants.

[0185] These additives, preferably in the form of powders, may be present in composition (A) in an amount ranging from 0 to 20% by weight relative to the total weight of the composition.

[0186] A person skilled in the art will take care to choose these possible additives and their quantities in such a way that they do not harm the properties of the anhydrous solid composition (A).

[0187] According to a preferred embodiment of the invention, the anhydrous solid composition (A) includes: (i) one or more anionic sulfate surfactants, (ii) one or more amphoteric or zwitterionic surfactants chosen from alkyl(C8-C2o)betaine(s), alkyl(C8-C20)amidoalkyl(C3-C8)betaine(s), and mixtures thereof, and (iii) one or more C10-C20 fatty acid salts; and the total surfactant content being greater than or equal to 60% by weight relative to the total weight of the anhydrous solid composition.

[0188] According to a particularly preferred embodiment of the invention, the anhydrous solid composition (A) comprises: (i) one or more anionic sulfate surfactants, (ii) one or more amphoteric or zwitterionic surfactants chosen from alkyl(C8-C2o)betaine(s), alkyl(C8-C20)amidoalkyl(C3-C8)betaine(s), and mixtures thereof, (iii) one or more C10-C20 fatty acid salts, better still C12-C18, more preferably magnesium stearate, (iv) optionally one or more cationic polymers, preferably chosen from cationic polysaccharides, more preferably chosen from cationic guar gums, polyquarnium-10, and mixtures thereof, and (v) optionally one or more non-ionic surfactants, preferably one or more C8-C40 oxyalkylenated fatty alcohols; the total content of surfactants being greater than or equal to 60% by weight, preferably ranging from 60 to 95% by weight, better still from 65 to 90% by weight, and even better still from 70 to 85% by weight, relative to the total weight of the anhydrous solid composition.

[0189] Composition (B)

[0190] The preparation process according to the invention comprises at least one step of mixing an anhydrous solid composition (A) with an aqueous composition (B).

[0191] The composition (B) used in the process according to the invention comprises water.

[0192] Preferably, the total water content in composition (B) ranges from 80 to 100% by weight, more preferably from 85 to 100% by weight, more preferably from 90 to 100% by weight, relative to the total weight of composition (B).

[0193] More preferably, composition (B) comprises 100% water.

[0194] Composition (B) may also contain additives usually used in cosmetics, such as, for example, preservatives, perfumes and / or colorants.

[0195] These additives may be present in composition (B) in an amount ranging from 0 to 20% by weight relative to the total weight of the composition.

[0196] The person skilled in the art will take care to choose these possible additives and their quantities of so that they do not harm the properties of composition (B).

[0197] The weight ratio of the total content of anhydrous solid composition (A) on the one hand, to the total content of composition (B) on the other hand ranges from 0.01 to 0.5, preferably from 0.05 to 0.4, and more preferably from 0.1 to 0.3.

[0198] Composition (C) corresponds to the aqueous composition obtained by mixing composition (A) with composition (B) previously described.

[0199] Preferably, the duration of stirring in step (ii) of the preparation process according to the invention ranges from 1 to 120 seconds; more preferably from 2 to 60 seconds; more preferably still from 3 to 30 seconds; better still from 5 to 20 seconds.

[0200] The stirring of the aqueous composition (C) can be carried out by hand, for example by shaking and / or turning over one or more times the container containing the composition (C).

[0201] Advantageously, once step (ii) has been carried out, the anhydrous solid composition (A) can be completely dissolved

[0202] In step (iii) of the preparation process according to the invention, the composition (C) is left to stand for at least 2 hours, at room temperature and atmospheric pressure, more preferably at least 4 hours, better still 6 hours, even better still 8 hours, always better still 10 hours, or even 12 hours, or even 18 hours, and very particularly preferably at least 24 hours, before its use on keratin materials.

[0203] Preferably, the process according to the invention is a process for preparing a composition for washing keratin materials, more preferably for washing hair.

[0204] The ready-to-use composition

[0205] The aqueous composition obtained by the preparation process according to the invention is ready-to-use.

[0206] The aqueous composition obtained by the preparation process according to the invention is preferably a shampoo.

[0207] Preferably, the pH of the ready-to-use aqueous composition obtained by the preparation process according to the invention is between 3 and 8, more preferably between 3.5 and 7, even more preferably between 4.5 and 5.5.

[0208] More preferably, the process according to the invention is a process for preparing a transparent composition for washing keratin materials.

[0209] The aqueous composition obtained by the preparation process according to the invention is preferably transparent.

[0210] It has been noted that the transparency of the ready-to-use composition is particularly aesthetic and sought after by users, in particular when the aqueous composition obtained is packaged in a transparent container.

[0211] By “transparent” composition is meant a composition through which one can see clearly with the naked eye.

[0212] The transparency of the ready-to-use composition can be characterized by measuring its transmittance.

[0213] In the context of the present invention, the transmittance measurements are carried out at 25°C and at atmospheric pressure, with a UV-Visible spectrophotometer, CARY Type 100 scan.

[0214] Preferably, the transmittance of the ready-to-use composition, measured at room temperature (25°C) and atmospheric pressure, is greater than or equal to 80%, preferably greater than or equal to 85%, more preferably still greater than or equal to 90%, even better still greater than or equal to 92%; and in particular ranging from 80 to 100%, or even from 85 to 100%, in particular from 90 to 100%, or even from 92 to 100%.

[0215] The invention also relates to the process for treating keratin materials comprising the application to said keratin materials of the composition obtained by the preparation process as described above.

[0216] Preferably, the treatment process is a process for washing the keratin materials, and optionally also for conditioning the keratin materials.

[0217] The following examples serve to illustrate the invention without, however, being limiting in nature. Examples:

[0218] The anhydrous solid compositions A to F according to the invention are prepared from the ingredients indicated in the tables below, the quantities of which are expressed in % by weight of active material (AM).

[0219] [Tables 1] Composition A Composition B Sodium lauryl sulfate 42.1 59.2 Sodium coco-sulfate 20.8 - Cocamidopropyl betaine 16.2 20.9 Hydroxypropyl guar hydroxypropyltrimonium chloride 3.3 - Polyquaternium-10 - 3.1 PPG-5-ceteth-20 2.5 2.6 Magnesium stearate 3 1 Preservatives 5.9 4.8 Ethyl lactate - 1 Sodium chloride 2.9 3.7 Perfume 3.3 3.7

[0220] [Tables2] Composition C Composition D Sodium lauryl sulfate 70.5 68.9 Cocamidopropyl betaine 9.1 8.9 Hydroxypropyl guar hydroxypropyltrimonium chloride 3.1 4.8 Guar hydroxypropyltrimonium chloride 1.8 - Amodimethicone - 3 Magnesium stearate 3 3 Preservatives 7.2 6.3 Sodium chloride 1.6 1.6 Perfume 3.7 3.5

[0221] [Tables 3] Composition E Sodium lauryl sulfate 64.1 Cocamidopropyl betaine 16.5 Hydroxypropyl guar hydroxypropyltrimonium chloride 3.3 Mica 0.7 Tricalcium phosphate 3 Preservatives 6.1 Sodium chloride 3 Perfume 3.3

[0222] [Tables4] Composition F Sodium lauryl sulfate 65.8 Cocamidopropyl betaine 14.3 Hydroxypropyl guar hydroxypropyltrimonium chloride 1.7 Polyquaternium-10 1.7 Magnesium stearate 5 Preservatives 6.9 Sodium chloride 1.2 Perfume 3.4

[0223] Protocol:

[0224] Each anhydrous solid composition (A to F) according to the invention was poured into a separate transparent glass bottle comprising water, according to the respective quantities indicated in Table 5 below.

[0225] [Tables 5] Solid compositions ABCDEF Quantity of anhydrous solid composition added (in g) 45.7 48.6 40.8 41.7 44.9 43.7 Quantity of water added (in g) 204.3 201.4 209.2 208.3 205.1 206.3 Weight ratio of the quantity of anhydrous solid composition to the quantity of water 0.22 0.24 0.20 0.20 0.22 0.21

[0226] Then the 6 closed bottles were shaken and turned over several times by hand, to obtain the aqueous compositions MA to MF respectively.

[0227] The aqueous compositions MA to MF were then left to stand for 24 hours at room temperature (25°C) and atmospheric pressure.

[0228] After 24 hours of standing, it is observed that the aqueous compositions MA to MD are transparent, and that the aqueous compositions ME and MF are opaque.

[0229] It has notably been observed that the aqueous composition MA has a transmittance of 97%.

[0230] After 24 hours of rest, the aqueous compositions MA to MF were applied to locks of hair (2g of composition / g of lock of hair). The locks were then left in the open air for a setting time of 5 min, and finally rinsed with clean water.

[0231] It has been observed that the aqueous compositions MA to MF have good washing power and provide good cosmetic properties to the hair. In particular, these aqueous compositions MA to MF provide suppleness, a soft feel, shine and facilitate detangling of the hair.

Claims

Claims

1. Process for preparing a composition for washing keratin materials, comprising: (i) at least one step of mixing: a. an anhydrous solid composition (A) comprising: - one or more anionic surfactants, and - one or more amphoteric or zwitterionic surfactants, b. with a composition (B) comprising water, the weight ratio of the total content of composition (A) to the total content of composition (B) ranging from 0.01 to 0.5; then (ii) at least one step of stirring the aqueous composition (C) resulting from said mixing; then (iii) at least one step of allowing the aqueous composition (C) to stand for at least 2 hours before its use on keratin materials.

2. Method according to the preceding claim, characterized in that the anionic surfactant(s) are chosen from sulfate anionic surfactants; preferably from alkyl sulfates, alkyl ether sulfates, alkyl a-midoether sulfates, alkylarylpolyether sulfates, monoglyceride sulfates; as well as the salts of these compounds; more preferably from C6-C30 alkyl sulfates, better still C8-C24, even better still C10-C24, or even C12-C22, C6-C24 alkyl ether sulfates, better still C10-C24, or even C12-C22, preferably comprising from 1 to 20 ethylene oxide units, and mixtures thereof; more preferably still among the C6-C3o alkyl sulfates, better still C8-C24, even better still C10-C24, or even C12-C22-

3. Process according to any one of the preceding claims, characterized in that the total content of anionic surfactant(s) ranges from 55 to 90% by weight, preferably from 56 to 85% by weight, more preferably from 57 to 80% by weight, better still from 60 to 75% by weight, relative to the total weight of the anhydrous solid composition (A).

4. Process according to any one of the preceding claims, characterized in that the amphoteric or zwitterionic surfactant(s) are chosen from alkyl(C8-C2o)betaines, alkyl(C8-C2o)amidoalkyl(C3-C8)betaines, alkyl(C8-C2o)amphoacetates, alkyl(C8-C2o)amphodiacetates and mixtures thereof; preferably from alkyl(C8-C2o)betaines, alkyl(C8-C20)amidoalkyl(C3-C8)betaines and mixtures thereof.

5. Process according to any one of the preceding claims, characterized in that the total content of amphoteric or zwitterionic surfactant(s) ranges from 5 to 40% by weight, preferably from 6 to 35% by weight, more preferably from 7 to 30% by weight, better still from 8 to 20% by weight, relative to the total weight of the anhydrous solid composition (A).

6. Process according to any one of the preceding claims, characterized in that the total content of surfactants is greater than or equal to 60% by weight, preferably ranging from 60 to 95% by weight, more preferably from 65 to 90% by weight, even more preferably from 70 to 85% by weight, relative to the total weight of the anhydrous solid composition (A).

7. Method according to any one of the preceding claims, characterized in that the anhydrous solid composition (A) further comprises one or more anti-caking agents, preferably chosen from C8-C32 fatty acid salts, tricalcium phosphate, calcium silicate, magnesium silicate, magnesium carbonate, silicon dioxide, talc, silica, sodium stearoyl fumarate, tetrasodium pyrophosphate, and mixtures thereof; preferably from C8-C32 fatty acid salts, better still from C10-C20, even better still from C[2-C i8; more preferably from alkali metal and alkaline earth metal salts of stearic acid, and mixtures thereof; and even more preferably the anti-caking agent is magnesium stearate.

8. Method according to any one of the preceding claims, characterized in that the anhydrous solid composition (A) further comprises one or more cationic polymers; preferably chosen from: (1) homopolymers or copolymers derived from acrylic or methacrylic esters or amides and comprising at least one of the units of the following formula: formulas in which: - R3, identical or different, denote a hydrogen atom or a CH3 radical; - A, identical or different, represent a divalent alkyl group, linear or branched, 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, identical or different, represent an alkyl group having from 1 to 18 carbon atoms or a benzyl radical; preferably an alkyl group having from 1 to 6 carbon atoms; - R1 and R2, identical or different, represent a hydrogen atom or an alkyl group having from 1 to 6 carbon atoms, preferably methyl or ethyl; and - X denotes an anion derived from a mineral or organic acid such as a methosulfate anion or a halide such as chloride or bromide, (2) cationic polysaccharides, such as cellulose ether derivatives containing quaternary ammonium groups, cationic cellulose copolymers, cellulose derivatives grafted with a water-soluble quaternary ammonium monomer and cationic galactomannan gums, (3) polymers consisting of piperazinyl units and divalent alkylene or hydroxyalkylene radicals with linear or branched chains, optionally interrupted by oxygen, sulfur, nitrogen atoms or by aromatic or heterocyclic rings, as well as the oxidation and / or quaternization products of these polymers, (4) water-soluble polyaminoamides, prepared in particular by polycondensation of an acid compound with a polyamine, (5) polyaminoamide derivatives resulting from the condensation of polyalkylene polyamines with polycarboxylic acids followed by alkylation by bifunctional agents, (6) polymers obtained by reaction of a polyalkylene polyamine comprising two primary amine groups and at least one secondary amine group with a dicarboxylic acid chosen from diglycolic acid and saturated aliphatic dicarboxylic acids having from 3 to 8 carbon atoms, (7) alkyl diallyl amine or dialkyl diallyl ammonium cyclopolymers, (8) quaternary diammonium polymers comprising recurring units of formula (VIII): R., R ri” ;---N+-A -N+— B :--(Vim II 1 D X- R..x~ formula (VIII), in which: - Rn, Ru, Rb and Ri6, which may be identical or different, represent aliphatic, alicyclic or arylaliphatic radicals comprising from 1 to 20 carbon atoms or lower hydroxyalkylaliphatic radicals, or Rn, Ru, R[5 and R[6, together or separately, constitute with the nitrogen atoms to which they are attached heterocycles optionally comprising a second heteroatom other than nitrogen or Rn, Ru, Ris and Ri6 represent a linear or branched C1 to C6 alkyl radical substituted by a nitrile, ester, acyl, amide or -CO-O-Rp-D or -CO-NH-Rp-D group where Rn is an alkylene and D a quaternary ammonium group; - Ai and Bi represent divalent polymethylene groups comprising from 2 to 20 carbon atoms which may be linear or branched, saturated or unsaturated, and which may contain, linked to or intercalated in the main chain, one or more aromatic rings, or one or more oxygen, sulfur atoms or sulfoxide, sulfone, disulfide, amino, alkylamino, hydroxyl, quaternary ammonium, ureido, amide or ester groups, and - X denotes an anion derived from a mineral or organic acid; it being understood that Ai, Rn and R15 can form with the two nitrogen atoms to which they are attached a piperazine ring; furthermore, if Ai denotes a linear or branched, saturated or unsaturated alkylene or hydroxyalkylene radical, Bi can also denote a group (CH2)n-CO-D-OC-(CH2)n- in which D denotes: a) a glycol residue of formula -OZO-, where Z denotes a linear or branched hydrocarbon radical or a group corresponding to one of the following formulae: -(CH2-CH2-O)X-CH2-CH2- and -[CH2-CH(CH3)-O]y -CH2-CH(CH3)- where 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-, where Y denotes a linear or branched hydrocarbon radical, or the divalent radical -CH2-CH2-SS-CH2-CH2-; or d) a ureylene group of formula: -NH-CO-NH-, (9) quaternary polyammonium polymers comprising units of formula (X): -NHCHl-MH-CO X-^ $19 (Xj R (Ch - co - nh ■ (ch a - n + - a - formula (X), in which: - R18, R19, R20 and R2B, identical or different, represent a hydrogen atom or a methyl, ethyl, propyl, [3-hydroxyethyl, [3-hydroxypropyl or -CH2CH2(OCH2CH2)POH radical, where p is equal to 0 or to an integer between 1 and 6, provided that R[8, R19, R20 and R2[ do not simultaneously represent a hydrogen atom, - r and s, identical or different, are whole numbers 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, and - A denotes a radical of a dihalide or preferably represents -CH2-CH2-O-CH2-CH2-; (10) quaternary polymers of vinylpyrrolidone and vinyli-midazole, (11) polyamines; and (12) polymers comprising in their structure: (a) one or more units corresponding to the following formula (A): —CH—CH— 1 (b) optionally one or more units corresponding to the following formula (B): —Qrk—CH— | ® HH—C—H II 0 (13) and mixtures thereof; more preferably, the cationic polymer(s) are chosen from cationic polysaccharides.

9. Method according to any one of the preceding claims, characterized in that the anhydrous solid composition (A) further comprises at least one non-ionic surfactant; preferably chosen from oxyalkylenated fatty alcohols comprising at least one C8 to C40 alkyl chain, saturated or unsaturated, linear or branched, and comprising a number of ethylene oxide and / or propylene oxide groups ranging from 1 to 100; more preferably chosen from oxyethylenated and oxypropylenated fatty alcohols comprising at least one C8 to C20 alkyl chain, better still C10 to C[8, saturated or unsaturated, linear or branched, and comprising a number of ethylene oxide and propylene oxide groups ranging from 2 to 50, better still from 2 to 40.

10. Method according to any one of the preceding claims, characterized in that the anhydrous solid composition (A) is in powder form.

11. Method according to any one of the preceding claims, characterized in that the weight ratio of the total content of anhydrous solid composition (A) to the total content of composition (B) ranges from 0.05 to 0.4, preferably from 0.1 to 0.

3.

12. A method according to any preceding claim, ca- characterized in that the duration of agitation in step (ii) ranges from 1 to 120 seconds; preferably from 2 to 60 seconds; more preferably from 3 to 30 seconds; better still from 5 to 20 seconds.

13. Process according to any one of the preceding claims, characterized in that, in step (iii), the composition (C) is left to stand for at least 4 hours before its use on the keratin materials; preferably at least 6 hours, better still 8 hours, even better still 10 hours, always better still 12 hours, or even 18 hours, and very particularly preferably at least 24 hours before its use on the keratin materials.

14. Process according to any one of the preceding claims, for the preparation of a composition, optionally transparent, for washing keratin materials, preferably hair.

15. Process for treating keratin materials comprising the application to said keratin materials of the composition obtained by the preparation process according to any one of claims 1 to 14.