Anhydrous solid composition comprising a combination of particular anionic surfactants and at least one polymeric organic filler

Abstract

TITLE: Anhydrous solid composition comprising a combination of particular anionic surfactants and at least one polymeric organic filler The present invention relates to an anhydrous solid composition intended in particular for washing and / or conditioning keratin fibers, in particular human keratin fibers such as hair, and which comprises a particular combination of at least two anionic surfactants, one of which is of the sulfonate type and the other of the carboxylate type, in the presence of at least one particular filler. The invention also relates to a conditioning article comprising said anhydrous solid composition, as well as methods for the cosmetic treatment of keratin fibers, in particular human keratin fibers such as hair, using said anhydrous solid composition or said conditioning article.The invention further relates to the use of said anhydrous solid composition or said conditioning article for washing and / or conditioning keratin fibers, in particular human keratin fibers such as hair.

Description

Title of the invention: Anhydrous solid composition comprising a combination of particular anionic surfactants and at least one polymeric organic filler

[0001] The present invention relates to an anhydrous solid composition intended in particular for washing and / or conditioning keratin fibres, in particular human keratin fibres such as hair, and which comprises a particular combination of at least two anionic surfactants, one of which is of the sulfonate type and the other of the carboxylate type, in the presence of at least one particular filler.

[0002] The invention also relates to a packaging article comprising said anhydrous solid composition, as well as methods for the cosmetic treatment of keratin fibers, in particular human keratin fibers such as hair, using said anhydrous solid composition or said packaging article.

[0003] The invention further relates to the use of said anhydrous solid composition or said conditioning article for washing and / or conditioning keratin fibers, in particular human keratin fibers such as hair.

[0004] In the field of hair hygiene, keratin fiber washing products are generally intended to clean said fibers while providing them with good cosmetic properties. Conventional products, such as shampoos, are most often in a more or less thickened liquid form. Due to their liquid texture, these products can however have various drawbacks, and in particular prove to be difficult to dose.

[0005] Indeed, the more liquid they are, the more they tend to escape between the fingers, making their dosage difficult and leading to waste. These products can also leak out of their packaging, which can cause inconvenience to the consumer when these products come into contact with clothing or objects, for example when moving.

[0006] In order to modify the texture of these products, and in particular to make it more compact, thickeners are generally used. The addition of these compounds, however, is often to the detriment of the cosmetic effects of the compositions. The use of these thicker compositions also requires a lot of rinsing water in order to eliminate the excess product on the fibers. However, in many countries where access to water is restricted, the rinsing time and consequently the quantity of water necessary to properly rinse the product are key indicators of the usability of a composition.

[0007] In order to overcome some of these problems, new solid cosmetic formulations, in particular shampoos in the form of granules or solid powder, have been developed. However, these new formulations are not always entirely satisfactory. Those in the form of loose powder can in fact pose problems of volatility, gripping and / or dosage, while those in the form of agglomerates, such as granules for example, can tend to disintegrate or disintegrate with difficulty in the presence of water. Thus, the latter do not always allow rapid foaming and / or satisfactory abundance of foam to be obtained, adversely affecting their use and their spreading on the keratin fibers. They can also be difficult to remove when rinsing and sometimes even leave unpleasant residues on the fibers for the consumer.These formulations may also not provide complete satisfaction in terms of cosmetic performance, particularly in terms of suppleness, feel, softness, shine and detangling.

[0008] Thus, there is a real need to provide a composition in solid form having an improved environmental profile, i.e. requiring little water throughout its use. The composition must not only be easily graspable, disintegrate easily and have good foaming properties, particularly in terms of start-up, abundance and density, but it must also be quick to rinse without leaving residue on the keratin fibres.

[0009] The composition must also have good detergent power while providing satisfactory cosmetic properties, particularly in terms of flexibility, feel, softness, shine and detangling.

[0010] It has now been discovered that an anhydrous solid composition comprising a particular combination of at least two anionic surfactants, one of which is of the sulfonate type and the other of the carboxylate type in a particular weight ratio, in the presence of an amphoteric or zwitterionic surfactant, and a polymeric organic filler, makes it possible to achieve the objectives set out above, and in particular to propose a composition in solid form combining good detergent power with improved foam properties, without requiring large quantities of water.

[0011] The present invention therefore relates to an anhydrous solid composition comprising: (i) one or more sulfonate anionic surfactants, (ii) one or more carboxylate anionic surfactants, (iii) one or more amphoteric or zwitterionic surfactants, and (iv) one or more polymeric organic fillers; the weight ratio between the total content of anionic surfactant(s) of the car- boxylate (ü) and the total content of anionic surfactant(s) of sulfonate type (i) being greater than or equal to 0.6.

[0012] The particular combination of the compounds of the invention makes it possible to obtain a solid composition that is easy to collect, handle and dose. Indeed, the composition thus obtained has a cohesion or granulation such that the gripping and dosing properties are improved. The composition can then be packaged in the form of a single dose, a particularly interesting form, for example, when traveling or practicing a sport (lighter bags, limiting the risk of leakage, reducing waste).

[0013] This composition also disintegrates quickly on contact with water and makes it possible to easily and quickly obtain a firm, creamy and abundant foam, of a quality comparable to the foam obtained with a conventional liquid shampoo composition. This foam can then be distributed easily and evenly over the keratin fibers.

[0014] Furthermore, the composition of the invention rinses quickly without leaving unpleasant residues on the fibers and gives them a natural and clean feel after rinsing. The fibers treated with the composition of the invention also have good cosmetic properties, particularly in terms of softness, suppleness, and feel. They are also well individualized and thus easier to untangle.

[0015] The present invention also relates to a process for the cosmetic treatment, in particular washing and / or conditioning, of keratin fibers, in particular human keratin fibers such as hair, comprising the application to said keratin fibers of an anhydrous solid composition as defined above; the anhydrous solid composition being applied directly to said keratin fibers or after having been previously moistened with water.

[0016] The present invention further relates to the use of an anhydrous solid composition as defined above for washing and / or conditioning keratin fibers, in particular human keratin fibers such as hair.

[0017] The present invention also relates to a packaging article comprising - an envelope defining at least one cavity, the envelope comprising one or more water-soluble and / or fat-soluble compounds; - an anhydrous solid composition as defined above; it being understood that the anhydrous solid composition is located in one of the cavities defined by the envelope.

[0018] This packaging article makes it possible in particular to resolve the problems of dosage of the anhydrous solid composition. It also facilitates its storage and its transport. In particular, the packaging article of the invention provides better protection of the composition against humidity.

[0019] The conditioning article may also make it possible to obtain a final composition for washing and / or conditioning keratin fibers that is thicker in the hand, which may be in the form of a cream. It may also act as a foam booster. Indeed, the volume of foam obtained after dilution of the conditioning article may be greater than the volume of foam obtained after dissolution of the anhydrous solid composition alone.

[0020] The present invention further relates to the use of a conditioning article as defined above for washing and / or conditioning keratin fibers, in particular human keratin fibers such as hair.

[0021] The present invention also relates to a method for cosmetic treatment, in particular washing and / or conditioning, of keratin fibers, in particular human keratin fibers such as hair, comprising a step of implementing a conditioning article as defined above.

[0022] Preferably, said cosmetic treatment method comprises the following steps: (i) mixing the packaging article in a composition capable of dissolving, in whole or in part, the envelope of said packaging article, ii) apply the composition obtained in step i) to the keratin fibers, iii) optionally leave to stand, iv) rinse said keratin fibers, and v) optionally drying said keratin fibers.

[0023] Other objects, characteristics, aspects and advantages of the invention will appear even more clearly on reading the description and the example which follows.

[0024] In what follows, and unless otherwise indicated, the limits of a domain of values are included in this domain, in particular in the expressions “between” and “ranging from ... to ...”.

[0025] Furthermore, the expression “at least one” used in the present description is equivalent to the expression “one or more”.

[0026] By "anhydrous composition" is meant a composition comprising a water content of less than 5% by weight, preferably less than 4% by weight, relative to the weight of the composition. Preferably, this water content is less than 3% by weight, relative to the weight of the composition.

[0027] In particular, the composition 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.

[0028] The anhydrous solid composition according to the invention may be in the form of powder, paste, particles (for example spherical particles such as small beads or granules), compressed tablet, stick or bread. Preferably, the composition according to the invention is in the form of powder or particles.

[0029] By "powder" is meant a composition in powder form, preferably essentially free of dust (or fine particles). In other words, the particle size distribution 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 particles (particle size evaluated using a RETSCH AS 200 DIGIT granulometer; Oscillation height: 1.25 mm / sieving time: 5 minutes).

[0030] By "paste" is meant a composition having a viscosity greater than 5 poises (0.5Pa.s), and preferably greater than 10 poises (IPa.s), measured at 25°C and at a shear rate of 1s 1; this viscosity can be determined using a Coneplan rheometer.

[0031] 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. In particular, they may be spherical (such as granules, pellets, balls), square, rectangular, or elongated such as rods. Spherical particles are particularly preferred.

[0032] Advantageously, the size of the powders or particles is, in its largest dimension, between 45 pm and 5 mm, preferably between 50 pm and 2 mm, more preferably between 50 pm and 1 mm, and better still between 60 pm and 600 pm.

[0033] When the anhydrous solid composition according to the invention is not in the form of powder or particles, it preferably has a penetration force at 25°C and 1 atm, greater than or equal to 200 g, preferably greater than or equal to 300 g, more preferably greater than or equal to 400 g, and better still greater than or equal to 500 g. The penetration force is determined by penetrometry. The texture analysis measurements are carried out at 25°C using a Stable Micro Systems TA.XT Plus texturometer. The penetrometry experiments are carried out with a metal rod equipped with a screwed tip, said tip being a 2 mm P / 2N needle for the upper part, connected to the measuring head. The piston sinks 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.

[0034] The anhydrous solid composition according to the invention may be in the form of a compressed anhydrous solid composition, in particular using a manual or mechanical press. Preferably, the hardness of the anhydrous solid composition compressed is between 10 and 300 N, more preferably between 15 and 200 N, and better still between 15 and 100 N.

[0035] The density of the anhydrous solid composition according to the present invention is preferably between 0.1 and 1, more preferably between 0.2 and 0.8, and better still between 0.3 and 0.6.

[0036] A determined quantity (mass, m) of powder is placed in a graduated cylinder. The cylinder is then tapped 2500 times automatically. The volume (v) thus obtained is read from the cylinder and the density (d) is then determined according to the formula d=m / v.

[0037] Anionic sulfonate surfactants

[0038] The anhydrous solid composition according to the present invention comprises one or more anionic surfactants of sulfonate type.

[0039] By "sulfonate type anionic surfactant" is meant, within the meaning of the present invention, an anionic surfactant comprising one or more sulfonic or sulfonate functions (-SO3H or -SO3), which may optionally comprise one or more carboxylic or carboxylate functions (-COOH or -COO) and not comprising sulfate functions.

[0040] Such surfactants may advantageously be chosen from alkylsulfonates, alkylamidesulfonates, alkylarylsulfonates, alpha-olefin-sulfonates, paraffin-sulfonates, alkylsulfosuccinates, alkylethersulfosuccinates, alkylamidesulfosuccinates, alkylsulfoacetates, sulfolaurates, N-acyltaurates, acylisethionates, as well as their salts and their mixtures; the alkyl groups of these compounds comprising in particular from 8 to 30 carbon atoms, preferably from 8 to 26, and more preferably from 10 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, and more preferably from 2 to 10 ethylene oxide units.

[0041] Preferably, the anionic surfactant(s) of sulfonate type are chosen from N-acyltaurates, and in particular N-acyl N-methyltaurates, acylisethionates, and sulfolaurates such as disodium 2-sulfolaurate, as well as their salts and their mixtures.

[0042] More preferably, the anionic surfactant(s) of sulfonate type may advantageously be chosen from the compounds of formula (I): RrCOX-R2-SO3M (I) formula (I), in which: - Ri represents a linear or branched alkyl group, preferably linear, comprising from 8 to 30 carbon atoms, preferably from 8 to 26 carbon atoms, and more preferably from 10 to 22 carbon atoms, - X represents an oxygen atom or a -N(CH3)- or -NH- group, preferably an oxygen atom, - R2 represents a linear or branched alkyl group, comprising from 1 to 4 carbon atoms, and - M denotes a hydrogen atom, an ammonium ion, an ion from an alkali or alkaline earth metal or an ion from an organic amine.

[0043] The anionic surfactant(s) of sulfonate type, and in particular those of formula (I) as defined above, may be used in salified or non-salified form.

[0044] As salt, it is possible in particular to use alkali metal salts such as sodium or potassium salts, ammonium salts, amine salts, amino alcohol salts or alkaline earth metal salts, for example, magnesium.

[0045] As amino alcohol salts, mention may be made of mono-, di- and triethanolamine salts, mono-, di- or tri-isopropanolamine salts, 2-amino 2-methyl 1-propanol, 2-amino 2-methyl 1,3-propanediol and tris(hydroxymethyl)amino methane salts.

[0046] Preferably, salts of alkali or alkaline earth metals are used, and in particular sodium or magnesium salts.

[0047] Preferably, the anionic surfactant(s) of sulfonate type are chosen from acyl isethionates and their mixtures, and more preferably from acyl(C8-C30) isethionates and their mixtures, used in the form of salts, and better still in the form of alkali or alkaline earth metal salts, and in particular sodium or magnesium salts.

[0048] As examples of particularly preferred acyl(C8-C30)isethionates, mention may in particular be made of cocoylisethionates and lauroyl methyl isethionates, in particular in the form of sodium salts.

[0049] The total content of the anionic surfactant(s) of sulfonate type, present in the anhydrous solid composition according to the invention, preferably ranges from 1 to 30% by weight, more preferably from 3 to 25% by weight, better still from 5 to 20% by weight, and better still from 8 to 16% by weight, relative to the total weight of the composition.

[0050] In a preferred variant of the invention, the anionic surfactant(s) of sulfonate type are chosen from acyl(C8-C30)isethionates and their mixtures, and the total content of the acyl(C8-C30)isethionate(s), present in the anhydrous solid composition according to the invention, preferably ranges from 1 to 30% by weight, more preferably from 3 to 25% by weight, better still from 5 to 20% by weight, and better still from 8 to 16% by weight relative to the total weight of the composition.

[0051] Anionic surfactants of the carboxylate type

[0052] The anhydrous solid composition according to the present invention further comprises one or more anionic surfactants of carboxylate type.

[0053] By "carboxylate type anionic surfactant" is meant, within the meaning of the present invention, an anionic surfactant comprising one or more carboxylic or carboxylate functions (-COOH or -COO), and not comprising a sulfonic or sulfonate function (-SO3H or -SO3) and not comprising a sulfate function.

[0054] Such surfactants may advantageously be chosen from acyllactates, N-acylglycinates, N-acylsarcosinates, and N-acylglutamates, alkyl ether carboxylates, alkyl glucose carboxylates, alkyl glucoside tartrates, alkyl glucoside citrates, acyl or alkyl groups preferably comprising from 8 to 30 carbon atoms, better still from 10 to 22 carbon atoms; and mixtures thereof; as well as the non-salified forms of these compounds.

[0055] Preferably, the anionic surfactant(s) of carboxylate type may advantageously be chosen from the compounds of formula (II): RdOCHoCH^WdCHYjp-COOX (II) formula (II), in which: - Yi denotes a hydrogen atom, a (CH2)qCOOX group or a hydroxy group; - W denotes an oxygen atom, a (O-Glu-O)r-(COCH(Y2 )-(C(OH)COOX)t)s group or a CO-NR3 group; - Y2 denotes a hydrogen atom or a hydroxy group; - R3 denotes a hydrogen atom or a methyl group; - X denotes a hydrogen atom, an ammonium ion, an ion derived from an alkali or alkaline earth metal or an ion derived from an organic amine; - R denotes a linear or branched alkyl group, preferably linear, comprising from 8 to 30 carbon atoms, preferably from 8 to 26 carbon atoms, and more preferably from 10 to 22 carbon atoms; - Glu denotes a divalent radical derived from glucopyranose with the removal of 2 hydroxyl groups; - p is equal to 0 or 1; - q denotes an integer ranging from 1 to 10; - n denotes an integer ranging from 0 to 50; - r denotes a number from 1 to 10; - s is equal to 0 or 1; -1 is equal to 0 or 1.

[0056] Preferably, the anionic surfactant(s) of carboxylate type (ii) are chosen from the compounds of formula (II) for which: - Yi denotes a hydrogen atom or a (CH2)qCOOX group; - W denotes a CO-NRi group; - R3 denotes a hydrogen atom or a methyl group; - X denotes a hydrogen atom, an ammonium ion, an ion derived from an alkali or alkaline-earth metal or an ion derived from an organic amine; - R denotes a linear or branched alkyl group, preferably linear, comprising from 8 to 30 carbon atoms, preferably from 8 to 26 carbon atoms, and more preferably from 10 to 22 carbon atoms; - p is equal to 0 or 1, preferably 0; - q denotes an integer ranging from 1 to 10; - n denotes an integer ranging from 0 to 50.

[0057] More preferably, the anionic surfactant(s) of carboxylate type are chosen from the compounds of formula (II) for which: - n=0, p=l, Yi=H, W=CONH (N-acylglycinates); - n=0, p=l, W= CON(CH3) and Yi = H (N-acylsarcosinates); and - n=0, p=l, W =CONH and Y! = CH2CH2COOX (N-acylglutamates).

[0058] The anionic surfactant(s) of carboxylate type, and in particular those of formula (II) as defined above, may be used in salified or non-salified form.

[0059] As salt, it is possible in particular to use alkali metal salts such as sodium or potassium salts, ammonium salts, amine salts, amino alcohol salts or alkaline earth metal salts, for example, magnesium.

[0060] As amino alcohol salts, mention may be made of mono-, di- and triethanolamine salts, mono-, di- or tri-isopropanolamine salts, 2-amino 2-methyl 1-propanol, 2-amino 2-methyl 1,3-propanediol and tris(hydroxymethyl)amino methane salts.

[0061] Preferably, salts of alkali or alkaline earth metals are used, and in particular sodium or magnesium salts.

[0062] Preferably, the anionic surfactants of carboxylate type are chosen from N-acyl(C8-C30)glutamates, and in particular stearoylglutamates, lauroylglutamates and cocoylglutamates; N-acyl(C8-C30)sarcosinates, and in particular palmitoylsarcosinates, stearoylsarcosinates, lauroylsarcosinates and cocoylsarcosinates; and mixtures thereof; in particular in the form of alkali or alkaline-earth metal, ammonium, amine or aminoalcohol salts.

[0063] In a particularly preferred manner, the anionic surfactant(s) of carboxylate type are chosen from N-acyl(C8-C30)glutamates, in particular in the form of alkali or alkaline-earth metal, ammonium, amine or amino alcohol salts, and mixtures thereof.

[0064] The total content of the carboxylate-type anionic surfactant(s) present in the anhydrous solid composition according to the invention preferably ranges from 1 to 40% by weight, more preferably from 2 to 35% by weight, better still from 5 to 30% by weight, and better still from 10 to 25% by weight, relative to the total weight of the composition.

[0065] In a preferred variant of the invention, the carboxylate-type anionic surfactant(s) are chosen from N-acyl(C8-C30)glutamates and mixtures thereof, and the total content of the N-acyl(C8-C30)glutamate(s) present in the anhydrous solid composition according to the invention preferably ranges from 1 to 40% by weight, more preferably from 2 to 35% by weight, better still from 5 to 30% by weight, and better still from 10 to 25% by weight relative to the total weight of the composition.

[0066] The weight ratio (R) between the total content of carboxylate type surfactant(s) (ii) and the total content of sulfonate type surfactant(s) (i), present in the anhydrous solid composition of the invention, is greater than or equal to 0.6. Advantageously, this weight ratio (R) is greater than or equal to 0.7, preferably greater than or equal to 0.8, more preferably greater than or equal to 1.0, or even strictly greater than 1.0, and better still greater than or equal to 1.1. Preferably, this weight ratio (R) ranges from 0.6 to 5, more preferably from 0.7 to 4.5, better still from 0.8 to 4.0, even better still from 1.0 to 3.5, and even more preferably from 1.1 to 3.0.

[0067] In a preferred embodiment, this weight ratio (R) is advantageously greater than or equal to 1, or even strictly greater than 1, preferably this weight ratio (R) ranges from 1 to 5, more preferably from 1.5 to 3.5, and better still from 2 to 3.

[0068] Preferably, the anhydrous solid composition according to the invention is free of anionic surfactant of sulfate type.

[0069] By "sulfate-type anionic surfactant" is meant, within the meaning of the present invention, surfactants comprising at least one anionic group or group ionizable into an anionic group, chosen from sulfate functions (-OSO3H or -OSO3).

[0070] Thus, the following anionic surfactants are preferably not present in the anhydrous solid composition according to the invention: salts of alkyl sulfates, alkylamidosulfates, alkyl ether sulfates, alkylamidoether sulfates, alkylaryl ether sulfates, and monoglyceride sulfates.

[0071] By "free", for the purposes of the present invention, is meant a composition which does not contain (0%) these anionic surfactants of sulfate type or which contains less than 0.1% by weight of such surfactants, relative to the total weight of the composition.

[0072] The total content of the anionic surfactant(s), that is to say in particular the total content of anionic surfactants of sulfonate type (i) and of anionic surfactants of carboxylate type (ii), present in the anhydrous solid composition according to the invention, is advantageously greater than or equal to 15% by weight, preferably this content ranges from 15 to 45% by weight, more preferably from 20 to 40% by weight, and better still from 25 to 35% by weight relative to the total weight of the composition.

[0073] Amphoteric or zwitterionic surfactants

[0074] The anhydrous solid composition according to the present invention further comprises one or more amphoteric or zwitterionic surfactants.

[0075] In particular, the amphoteric or zwitterionic surfactant(s), preferably non-silicone, used in the anhydrous solid composition according to the present invention, 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.

[0076] Mention may in particular be made of alkyl(C8-C20)betaines, alkyl(C8-C20)sulfobetaines, alkyl(C8-C20)amidoalkyl(C1-C6)betaines, alkyl(C8-C20)amidalkyl(C1-C6)sulfobetaines, and mixtures thereof.

[0077] 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):

[0078] 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, 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;

[0079] 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 acid Ra'-COOH 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-dipropionate, disodium capryloamphodipropionate, lauroamphodi-propionic acid, cocoamphodipropionic acid.

[0081] As an example, we can cite 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 one another, 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-C2o)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; and preferably alkyl(C8-C2o)betaines, alkyl(C8-C20)amidoalkyl(C3-C8)betaines and mixtures thereof.

[0086] Preferably, the amphoteric or zwitterionic surfactant(s) are chosen from alkyl(C8-C20)betaines, alkyl(C8-C20)amidoalkyl(C3-C8)betaines and mixtures thereof, and better still from alkyl(C8-C20)amidoalkyl(C3-C8)betaines and mixtures thereof.

[0087] The total content of the amphoteric or zwitterionic surfactant(s) present in the anhydrous solid composition according to the invention preferably ranges from 1 to 30% by weight, more preferably from 2 to 25% by weight, and better still from 5 to 20% by weight, relative to the total weight of the composition.

[0088] Polymeric organic fillers

[0089] The anhydrous solid composition according to the present invention further comprises one or more polymeric organic fillers.

[0090] For the purposes of the present invention, the term “filler” means organic and polymeric solid particles.

[0091] The fillers according to the invention participate in the solubilization or disintegration of the anhydrous solid composition of the invention, in particular in the presence of water. They can also contribute to improving the cosmetic performance due to the other compounds present in the composition.

[0092] Certain fillers may also have “anti-caking” properties.

[0093] The polymeric organic filler(s) present in the composition of the invention are preferably chosen from polysaccharides and their mixtures.

[0094] In particular, the polymeric organic fillers are preferably chosen from non-cationic polysaccharides and their mixtures.

[0095] In particular, mention may be made of cyclodextrins, starches, alginates, gellans, guar gum, celluloses and wood flours. Among the polymeric organic fillers, mention may also be made of crosslinked polyvinyl pyrrolidones and polyacrylates (aquakeep for example).

[0096] Preferably, the polymeric organic filler(s) are chosen from cyclodextrins, starches, alginates, gellans, guar gums, celluloses, wood flours, crosslinked polyvinyl pyrrolidones, polyacrylates and mixtures thereof, more preferably from celluloses, starches and mixtures thereof, and better still from starches and mixtures thereof.

[0097] The total content of the polymeric organic filler(s) present in the anhydrous solid composition according to the invention is preferably greater than or equal to 20% by weight, more preferably greater than or equal to 30% by weight, and better still greater than or equal to 35% by weight, relative to the total weight of the composition.

[0098] Advantageously, the total content of the polymeric organic filler(s) present in the anhydrous solid composition according to the invention ranges from 20 to 80% by weight, preferably from 30 to 70% by weight, and more preferably from 35 to 60% by weight, relative to the total weight of the composition.

[0099] In a preferred embodiment, the polymeric organic filler(s) are chosen from starches and mixtures thereof, and the total content of the starch(es) present in the anhydrous solid composition according to the invention is preferably greater than or equal to 20% by weight, more preferably greater than or equal to 30%. by weight, and better still greater than or equal to 35% by weight, relative to the total weight of the composition.

[0100] According to this embodiment, advantageously, the total content of the starch(es) present in the anhydrous solid composition according to the invention ranges from 20 to 80% by weight, preferably from 30 to 70% by weight, and more preferably from 35 to 60% by weight, relative to the total weight of the composition.

[0101] Cationic polymers

[0102] The anhydrous solid composition according to the present invention may optionally further comprise one or more cationic polymers, different from the polymeric organic fillers defined above.

[0103] For the purposes of the present invention, the term “cationic polymer” means any polymer comprising cationic groups and / or groups ionizable into cationic groups. Preferably, the cationic polymer(s) are hydrophilic or amphiphilic.

[0104] The cationic polymers are preferably not silicone-containing (do not include a Si-O unit).

[0105] The preferred cationic polymers are chosen from those which contain units comprising primary, secondary, tertiary and / or quaternary amine groups which can either be part of the main polymer chain or be carried by a side substituent directly linked to it.

[0106] Preferably, the cationic polymers according to the invention do not comprise an anionic group or a group ionizable into anionic groups.

[0107] The cationic polymers that can be used preferably have a weight-average molar mass (Mw) of between approximately 500 and 5.106, preferably of between approximately 103 and 3.106.

[0108] Among the cationic polymers, we can cite more particularly:

[0109] (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.

[0110] 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.

[0111] 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.

[0112] (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.

[0113] 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.

[0114] 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. 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.

[0115] 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.

[0116] 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.

[0117] Preferably, mention may be made of hydroxyethylcelluloses of formula (VI): in which: - R represents an ammonium group RaRbRcN+-, Q in which Ra, Rb, and 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; - R' represents an ammonium group R'aR'bR'cN+-, Q' in which R'a, R'b, and 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; 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; - n, x and y, identical or different, represent an integer between 1 and 10,000.

[0118] Preferably, in formula (VI), 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 Cu; 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.

[0119] Preferably, in formula (VI), 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.

[0120] 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'.

[0121] Even better, R' can be a group -N+(Ci2H25)(CH3)2, Q'.

[0122] The aryl radicals preferably denote the phenyl, benzyl, naphthyl or anthryl groups.

[0123] 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.

[0124] Mention may also be made of hydroxyethylcelluloses of formula (VI) 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.

[0125] More particularly, the polymers of formula (VI) are, for example, those whose viscosity is inclusively between 2000 and 3000 cPs, preferably between 2700 and 2800 cPs (between 2.7 and 2.8 Pa.s). Typically, SOFTCAT POLYMER SL-5 has a viscosity of 2500 cPs (2.5 Pa.s), SOFTCAT POLYMER SL-30 has a viscosity of 2700 cPs, SOFTCAT POLYMER SL-60 has a viscosity of 2700 cPs (2.7 Pa.s) and SOFTCAT POLYMER SL-100 has a viscosity of 2800 cPs (2.8 Pa.s). SOFTCAT POLYMER SX-1300X with a viscosity between 1000 and 2000 cPs (between 1 and 2 Pa.s) can also be used.

[0126] 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 by the company RHODIA.

[0127] (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.

[0128] (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 epi- lohydrin, 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.

[0129] (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.

[0130] (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.

[0131] (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 (VII) or (VIII): (CH,)kz(CH,)k 4CH,M----QR^ C(Rt2>CH2- --ÇR.n H2C HX. ch2 (VII) y. H formulas (VII) and (VIII), 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; - Rio and Rn, independently of each other, denote an alkyl group having 1 to 6 carbon atoms, a hydroxyalkyl group in which the alkyl group has 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.

[0132] 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".

[0133] (8) quaternary diammonium polymers comprising recurring units of formula (IX): formula (IX), 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

[0134]

[0135] to which they are attached a piperazine cycle; 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-. Preferably, X is an anion such as chloride or bromide. These polymers have a number average molar mass (Mn) generally between 1000 and 100000. We can cite more particularly polymers which are made up of recurring units corresponding to the formula (X):

[0136]

[0137] formula (X) in which 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. A particularly preferred compound of formula (X) is that for which RB R2, R3 and R4 represent a methyl radical, n=3, p=6 and X = Cl, called Hexadimethrine chloride according to the INCI nomenclature (CTFA). (9) quaternary polyammonium polymers comprising units of formula (XI): — N + - (CH.) - HH - CO - (OR - CO - NH ■ (CH A - N + — A — X- । ' (XI) x_ R2t formula (XI), 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-,

[0138] For example, we can cite the products "Mirapol® A 15", "Mirapol® ADI", "Mirapol® AZ1" and "Mirapol® 175" sold by the company Miranol.

[0139] (10) quaternary polymers of vinylpyrrolidone and vinylimidazole such as example the products marketed under the names Luviquat® FC 905, FC 550 and FC 370 by the company BASF

[0140] (11) polyamines such as Polyquart® H sold by COGNIS, referenced under the name of "POLYETHYLENEGLYCOL (15) TALLOW POLYAMINE" in the CTFA dictionary.

[0141] (12) polymers comprising in their structure: (a) one or more patterns corresponding to the following formula (A): —CH — CH— HH- (b) optionally one or more patterns corresponding to the following formula (B): —CFG—CH — " | (8) —C~H h O

[0142] 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.

[0143] 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), preferentially from 10 to 100 mol% of units corresponding to formula (A) and from 0 to 90 mol% of units corresponding to formula (B).

[0144] These polymers can be obtained for example by partial hydrolysis of polyvinylformamide. This hydrolysis can be carried out in an acidic or basic medium.

[0145] The weight-average molecular mass of said polymer, measured by light diffraction, can vary 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.

[0146] The cationic charge density of these polymers can vary from 2 meq / g to 20 meq / g, preferably from 2.5 to 15 and more particularly from 3.5 to 10 meq / g.

[0147] 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.

[0148] Preferably, the cationic polymer(s) are chosen from cationic polysaccharides (family (2)) and their mixtures, more preferably from cationic galactomannan gums and their mixtures, and better still from cationic guar gums and their mixtures.

[0149] The total content of the cationic polymer(s), when present in the anhydrous solid composition according to the invention, is preferably greater than or equal to 0.05% by weight, more preferably this total content ranges from 0.05 to 5% by weight, better still from 0.1 to 2% by weight, and even more preferably from 0.2 to 1.5% by weight, relative to the total weight of the composition.

[0150] According to a preferred embodiment, the cationic polymer(s) are chosen from polysaccharides and their mixtures, and the total content of the cationic polysaccharide(s), present in the anhydrous solid composition according to the invention, is preferably greater than or equal to 0.05% by weight, more preferably ranging from 0.05 to 5% by weight, and better still from 0.1 to 2% by weight, or even from 0.2 to 1.5% by weight relative to the total weight of the composition.

[0151] Nonionic surfactants

[0152] The anhydrous solid composition according to the present invention may optionally further comprise one or more non-ionic surfactants.

[0153] Examples of non-ionic surfactants which can be used in the compositions of the present invention are described for example in "Handbook of Surfactants" by MR PORTER, Blackie & Son editions (Glasgow and London), 1991, pp 116-178. They are chosen in particular from alcohols, alpha-diols, alkyl(Ci-C2o)phenols or fatty acids, these compounds being polyethoxylated, polypropoxylated or polyglycerolated, and having at least one fatty chain comprising, for example, from 8 to 18 carbon atoms, the number of ethylene oxide or propylene oxide groups being able to range in particular from 1 to 100 and the number of glycerol groups being able to range in particular from 1 to 30.

[0154] Mention may also be made of ethylene oxide and propylene oxide condensates. on fatty alcohols; polyethoxylated fatty amides preferably having from 1 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 having from 2 to 30 ethylene oxide units, sucrose fatty acid esters, polyethylene glycol fatty acid esters, (C6 to C24 alkyl)polyglycosides, N-(C6 to C24 alkyl)glucamine derivatives, amine oxides such as (C10 to C14 alkyl)amine oxides or N-(C10 to C15 acyl)aminopropylmorpholine oxides.

[0155] Among the non-ionic surfactants, it is more particularly preferred to use alkyl(poly)glycoside non-ionic surfactants.

[0156] By “alkyl(poly)glycoside” is meant an alkylpolyglycoside or an alkylmono-glycoside also called alkylglycoside in the present application, which can be alkoxylated by one or more alkylene oxide groups, preferably C2 to C4.

[0157] The non-ionic alkyl(poly)glycoside surfactant(s) used, alone or in mixture(s), in accordance with the present invention may be represented by the following formula (XII): R1O-(R2O)t(G)v (XII) formula (XII), in which: - Ri represents a saturated or unsaturated, linear or branched alkyl group containing from 8 to 24 carbon atoms, an alkylphenyl group whose linear or branched alkyl group contains from 8 to 24 carbon atoms, - R2 represents an alkylene group comprising approximately 2 to 4 carbon atoms, - G represents a saccharide unit comprising 5 to 6 carbon atoms, -1 denotes a value ranging from 0 to 10, preferably 0 to 4, and -v denotes a value from 1 to 15.

[0158] Preferably, the alkyl(poly)glycoside nonionic surfactant(s) correspond to formula (XII) in which: - Ri denotes a saturated or unsaturated, linear or branched alkyl group containing 8 to 18 carbon atoms, - G denotes glucose, fructose or galactose, and preferably glucose, -1 denotes a value from 0 to 3, and is preferably equal to 0, and - R2 and v are as defined previously.

[0159] The degree of polymerization of the nonionic alkyl(poly)glycoside surfactant(s), as represented for example by the index v in formula (XII) above, varies on average from 1 to 15, and preferably from 1 to 4. This degree of polymerization varies more particularly from 1 to 2, and better still from 1.1 to 1.5, on average.

[0160] The glycosidic bonds between the saccharide units are 1,6 or 1,4; and preferably 1,4.

[0161] The alkyl(poly)glycoside nonionic surfactants which can be used in the present invention are preferably alkyl(poly)glucosides notably represented by the products sold by the company COGNIS under the names PLANTAREN® (600 CS / U, 1200 and 2000) or PLANTACARE® (818, 1200 and 2000). You can also use the products sold by the company SEPPIC under the names TRITON CG 110 (or ORAMIX CG 110) and TRITON CG 312 (or ORAMIX® NS 10), the products sold by the company BASF under the name LUTENSOL GD 70 or those sold by the company CHEM Y under the name AGIO LK, or the products sold by the company EVONIK GOLDSCHMIDT under the trade names TEGO CARE CG 90 or TEGO CARE CG 90 MB.

[0162] As non-ionic surfactant, it is preferable to use compounds with the INCI name caprylyl / capryl glucoside, decyl glucoside, coco glucoside, lauryl glucoside, myristyl glucoside, cetearyl glucoside and / or arachidyl glucoside. The compound with the INCI name cetearyl glucoside is particularly preferred.

[0163] The total content of the non-ionic surfactant(s), when present in the anhydrous solid composition according to the invention, preferably ranges from 0.1 to 10% by weight, and more preferably from 0.2 to 5% by weight, relative to the total weight of the composition.

[0164] Cationic surfactants

[0165] The anhydrous solid composition according to the present invention may optionally further comprise one or more cationic surfactants.

[0166] The term "cationic surfactant" means a positively charged surfactant when it is contained in the compositions according to the invention. This surfactant may carry one or more positive permanent charges or contain one or more cationizable functions within the compositions according to the invention.

[0167] The cationic surfactants are advantageously chosen from salts of primary, secondary or tertiary fatty amines, optionally polyoxyalkylenated; quaternary ammonium salts, and mixtures thereof.

[0168] As quaternary ammonium salts, we can notably cite: - quaternary ammonium salts of formula (XIII): in which: the groups R8 to Rn, identical or different, represent a linear or branched aliphatic group, containing from 1 to 30 carbon atoms, or an aromatic group such as aryl or alkylaryl, at least one of the groups R8 to Ru comprising from 8 to 30 carbon atoms, preferably from 12 to 24 carbon atoms; the aliphatic groups may comprise heteroatoms such as in particular oxygen, nitrogen, sulfur and halogens; and X is an anion chosen in particular from the group of halides, phosphates, acetates, lactates, alkyl(Ci-C4)sulfates, alkyl(Ci-C4)sulfonates or alkyl(Ci-C4)arylsulfonates.

[0169] The aliphatic groups R8 to Ru may be chosen from C1-C30 alkyl, C1-C30 alkoxy, polyoxyalkylene (C2-C6), C1-C30 alkylamide, C1-C22 alkylamido(C2-C6)alkyl, C1-C22 alkylacetate and C1-C30 hydroxyalkyl groups.

[0170] Mention may in particular be made of halides, in particular chlorides, of tetraalkylammonium such as dialkyldimethylammonium or alkyltrimethylammonium chlorides in which the alkyl group contains from 12 to 22 carbon atoms, in particular behenyltrimethylammonium, distearyldimethylammonium, cetyltrimethylammonium and benzyldimethylstearylammonium chlorides.

[0171] Mention may also be made of halides, and in particular chlorides, of palmitylami-dopropyltrimethylammonium or stearamidopropyldimethyl-(myristyl acetate)-ammonium; in particular the product marketed under the name CERAPHYL® 70 by the company VAN DYK.

[0172] - quaternary ammonium salts of imidazoline of formula (XIV) in which: - Ri2 represents an alkenyl or alkyl group containing from 8 to 30 carbon atoms, for example derived from tallow fatty acids, - Rn represents a hydrogen atom, a C1 to C4 alkyl group or an alkenyl or alkyl group containing 8 to 30 carbon atoms, - R[4 represents a C1 to C4 alkyl group, - Rb represents a hydrogen atom or a C1 to C4 alkyl group, and - X is an anion, notably chosen from the group of halides, phosphates, acetates, lactates, alkyl(Cl-C4)sulfates, alkyl(Cl-C4)sulfonates or alkyl(Cl-C4)arylsulfonates.

[0173] Preferably, R[2 and Rn denote a mixture of alkenyl or alkyl groups comprising from 12 to 21 carbon atoms, for example derived from tallow fatty acids, R[4 denotes a methyl group, R[5 denotes a hydrogen atom. Such a product is for example marketed under the name REWOQUAT® W75 or W90 by the company Evonik.

[0174] - the quaternary di- or triammonium salts of formula (XV): in which: - Ri6 denotes an alkyl group comprising from 16 to 30 carbon atoms, optionally hydroxylated and / or optionally interrupted by one or more oxygen atoms, - Rn denotes hydrogen, an alkyl group containing 1 to 4 carbon atoms or a group -(CH2)3-N+(Ri6a)(Ri7a)(Ri8a), Ri6a, Rna, Ri8a, identical or different denoting hydrogen or an alkyl group containing 1 to 4 carbon atoms, - Ri8, Rw, R20 and R2i, identical or different, denote hydrogen or an alkyl group containing 1 to 4 carbon atoms, and - X is an anion chosen in particular from the group of halides, acetates, phosphates, nitrates, alkyl(Ci-C4)sulfates, alkyl(Ci-C4)sulfonates and alkyl(CrC4)arylsulfonates, in particular methylsulfate and ethylsulfate.

[0175] Such compounds are for example Finquat CT-P (Quaternium 89) and Finquat CT (Quaternium 75) offered by the company FINETEX.

[0176] - quaternary ammonium salts containing one or more ester functions of following formula (XVI): (CH^—(xvi) V i L f I R»—--x" in which: - R22 is chosen from C1 to C6 alkyl groups and C1 to C6 hydroxyalkyl or dihydroxyalkyl groups, - R23 is chosen from the group R26-C(=O)-; the linear or branched, saturated or unsaturated C1 to C22 hydrocarbon groups R27; and the hydrogen atom, - R25 is chosen from the group R28-C(=O)-; the linear or branched, saturated or unsaturated C1 to C6 hydrocarbon groups R29; and the hydrogen atom, - R24, R26 and R28, identical or different, are chosen from the hydro- groups carbon atoms C7 to C2i, linear or branched, saturated or unsaturated, - r, s and t, identical or different, are integers worth from 2 to 6, - rl and tl, identical or different, are worth 0 or 1, - y is an integer worth from 1 to 10, - x and z, identical or different, are integers ranging from 0 to 10, - X- is an anion, it being understood that r2 + rl = 2r and tl +12 = 2t, and that the sum x + y + z is from 1 to 15, provided that when x = 0 then R23 denotes R27 and that when z = 0 then R25 denotes R29.

[0177] The alkyl groups R22 may be linear or branched, preferably linear. Preferably, R22 denotes a methyl, ethyl, hydroxyethyl or dihydroxypropyl group, and more particularly a methyl or ethyl group.

[0178] Advantageously, the sum x + y + z is worth from 1 to 10.

[0179] When R23 is a hydrocarbon group R27, it may comprise from 12 to 22 carbon atoms, or else comprise from 1 to 3 carbon atoms.

[0180] When R25 is a hydrocarbon group R29, it preferably has 1 to 3 carbon atoms.

[0181] Advantageously, R24, R26 and R28, identical or different, are chosen from linear or branched, saturated or unsaturated Cn to C2i hydrocarbon groups, and more particularly from linear or branched C1i to C2i alkyl and alkenyl groups.

[0182] Preferably, x and z, identical or different, are 0 or 1.

[0183] Advantageously, y is equal to 1.

[0184] Preferably, r, s and t, identical or different, are equal to 2 or 3, and even more particularly are equal to 2.

[0185] The anion X is preferably a halide, preferably chloride, bromide or iodide, an alkyl(Cl-C4) sulfate, an alkyl(Cl-C4)sulfonate or an alkyl(Cl-C4)aryl-sulfonate, a methanesulfonate, a phosphate, a nitrate, a tosylate, an anion derived from an organic acid such as an acetate or a lactate or any other anion compatible with ester-functional ammonium. The anion X is more particularly a chloride, a methylsulfate or an ethylsulfate.

[0186] More particularly, the ammonium salts of formula (XVI) are used in the composition according to the invention, in which: - R22 denotes a methyl or ethyl group, - x and y are equal to 1, - z is equal to 0 or 1, - r, s and t are equal to 2, - R23 is chosen from the group R26-C(=O)-; methyl, ethyl or hydrocarbon groups from Cu to C22, the hydrogen atom, - R25 is chosen from the group R28-C(=O)-; the hydrogen atom, - R24, R26 and R28, identical or different, are chosen from Cn to C17 hydrocarbon groups, linear or branched, saturated or unsaturated, and preferably from Cn to Cp alkyl and alkenyl groups, linear or branched, saturated or unsaturated.

[0187] Advantageously, the hydrocarbon groups are linear.

[0188] Among the compounds of formula (XVI) there may be mentioned salts, in particular diacyloxyethyldimethylammonium chloride or methylsulfate, diacyloxyethyl-hydroxyethylmethylammonium, monoacyloxyethyldihydroxyethyl methylammonium, triacyloxyethylmethylammonium, monoacyloxyethylhydroxyethyl-dimethylammonium, and mixtures thereof. The acyl groups preferably have 14 to 18 carbon atoms and more particularly come from a vegetable oil such as palm or sunflower oil. When the compound contains several acyl groups, these may be identical or different.

[0189] These products are obtained, for example, by direct esterification of triethanolamine, triisopropanolamine, alkyldiethanolamine or alkyldiisopropanolamine, optionally oxyalkylenated, on fatty acids, or on mixtures of fatty acids, in particular of vegetable or animal origin, or by transesterification of their methyl esters. This esterification may be followed by quaternization using an alkylating agent such as an alkyl halide, preferably methyl or ethyl, a dialkyl sulfate, preferably methyl or ethyl, methyl methanesulfonate, methyl para-toluenesulfonate, glycol or glycerol chlorohydrin. Such compounds are, for example, marketed under the names DEHYQUART® by the company HENKEL, STEPANQUAT® by the company STEPAN, NOXAMIUM® by the company CECA, REWOQUAT® WE 18 by the company Evonik.

[0190] The composition according to the invention may contain, for example, a mixture of quaternary ammonium mono-, di- and triester salts with a majority by weight of diester salts. It is also possible to use the ammonium salts containing at least one ester function described in patents US-A-4874554 and US-A-4137180. It is also possible to use behenoylhydroxypropyltrimethylammonium chloride, for example, offered by the company KAO under the name Quartamin BTC 131.

[0191] Preferably, the ammonium salts containing at least one ester function contain two ester functions.

[0192] Advantageously, when they are present in the anhydrous solid composition according to the invention, the content of the cationic surfactant(s) ranges from 0.01 to 5% by weight, preferably from 0.05 to 3% by weight, and more preferably from 0.1 to 2% by weight relative to the total weight of the composition.

[0193] The total content of surfactants, present in the anhydrous solid composition according to the invention, is preferably less than or equal to 60% by weight, more preferably this total content ranges from 20 to 55% by weight, better still from 30 to 50% by weight, and even better still from 35 to 45% by weight, relative to the total weight of the composition.

[0194] Organic solvents

[0195] The anhydrous solid composition according to the present invention may optionally further comprise one or more organic solvents.

[0196] Preferably, the organic solvent(s) are chosen from linear or branched monoalcohols having from 1 to 8 atoms, and more preferably from 1 to 4 carbon atoms, polyols, in particular C2 to C8, polyethylene glycols, aromatic alcohols and their mixtures.

[0197] As examples of organic solvents which can be used according to the invention, mention may in particular be made of ethanol, propanol, butanol, isopropanol, isobutanol, propylene glycol, dipropylene glycol, isoprene glycol, butylene glycol, glycerol, benzyl alcohol, phenoxyethanol and mixtures thereof.

[0198] The organic solvent(s) that can be used according to the invention may be chosen from linear or branched monoalcohols having from 1 to 4 carbon atoms, and their mixtures, preferably from ethanol, propanol, butanol, isopropanol, isobutanol, and their mixtures.

[0199] Preferably, the organic solvent(s) are chosen from polyols, in particular C2 to C8, and their mixtures, and more preferably from glycerol, propylene glycol, and their mixtures.

[0200] In a preferred embodiment of the invention, the anhydrous solid composition comprises one or more organic solvents, preferably one or more polyols.

[0201] The total content of the organic solvent(s), when present in the anhydrous solid composition according to the invention, is preferably less than or equal to 20% by weight, more preferably less than or equal to 15% by weight, and better still ranges from 0.5 to 12% by weight, relative to the total weight of the composition.

[0202] The anhydrous solid composition according to the present invention may optionally further comprise one or more additional compounds different from the compounds defined above, preferably chosen from anionic, non-ionic polymers, and mixtures thereof, antioxidants, penetrating agents, sequestering agents, perfumes, buffers, dispersing agents, conditioning agents such as, for example, volatile or non-volatile, modified or unmodified silicones, film-forming agents, ceramides, preservatives, opacifying agents, lubricants (or anti-caking agents) and mixtures thereof.

[0203] According to a particular embodiment, the anhydrous solid composition of the invention may optionally comprise one or more lubricants. Such a lubricant may in particular act as an anti-caking agent, also called an anti-caking agent.

[0204] The lubricant(s) that can be used are different from the polymeric organic fillers and the cationic polymers defined above.

[0205] Among the lubricants that can be used in the anhydrous solid composition of the invention, mention may in particular be made of silica, in particular anhydrous colloidal silica, sericite, polyamide (Nylon®), poly-p-alanine and polyethylene powders, tetrafluoroethylene polymer (Teflon®) powders, acrylate and dimethicone copolymers, stearic acid, metal soaps derived from organic carboxylic acids having from 8 to 22 carbon atoms, preferably from 12 to 18 carbon atoms, such as, for example, zinc, magnesium or lithium stearates, zinc laurate and magnesium myristate, alkali or alkaline earth metal carbonates, such as, for example, magnesium, sodium and calcium carbonates, fatty acids such as stearic acid, celluloses, in particular crystalline celluloses, and their mixtures.

[0206] According to one embodiment, the lubricant(s) are advantageously chosen from metallic soaps derived from organic carboxylic acids having from 8 to 22 carbon atoms, preferably from 12 to 18 carbon atoms, and mixtures thereof, better still from zinc stearate, magnesium stearate, lithium stearate, zinc laurate, magnesium myristate and mixtures thereof. More preferably, the lubricant is magnesium stearate.

[0207] According to another embodiment, the lubricant(s) are advantageously chosen from alkali or alkaline-earth metal carbonates and their mixtures, preferably from magnesium carbonate, sodium carbonate, calcium carbonate and their mixtures; and more preferably magnesium carbonate.

[0208] Preferably, when the above additional compound(s) are present in the anhydrous solid composition according to the invention, the additional compound(s) are generally present in an amount for each of them of between 0.01 and 20% by weight relative to the weight of the composition.

[0209] Of course, those skilled in the art will take care to choose this or these possible additional compounds in such a way that the advantageous properties intrinsically attached to the anhydrous solid composition of the invention are not, or not substantially, altered by the addition(s) envisaged.

[0210] The present invention also relates to a cosmetic treatment process, and in particular a process for washing and / or conditioning keratin fibres, in particular human keratin fibres such as hair, comprising the application to said keratin fibres of an anhydrous solid composition such as defined above; the anhydrous solid composition being applied directly to said keratin fibers or after having been previously moistened with water.

[0211] The anhydrous solid composition according to the invention can be applied to dry or wet keratin fibers, and preferably to wet keratin fibers.

[0212] The anhydrous solid composition, thus applied, may optionally be rinsed or not, after a possible exposure time which may range from 1 to 15 minutes, preferably from 2 to 10 minutes.

[0213] Preferably, the anhydrous solid composition is rinsed after application.

[0214] According to a first embodiment of the invention, the anhydrous solid composition is applied directly to the keratin fibers, that is to say without being previously moistened and / or disintegrated in water.

[0215] When, according to this first embodiment, the anhydrous solid composition of the invention is applied directly (i.e. without prior moistening or disintegration) to the dry keratin fibers, water may optionally be added to said fibers and then rubbed / massaged in order to solubilize / pre-emulsify said composition and form an abundant and immediate foam. The foam thus obtained may then be rinsed after a possible exposure time.

[0216] Conversely, the anhydrous solid composition of the invention can also be applied directly (i.e. without prior moistening or disintegration) to the wet keratin fibers, then massaged / rubbed to disintegrate the particles and obtain an immediate and abundant foam. The foam thus obtained can then be rinsed after a possible exposure time.

[0217] According to another embodiment of the invention, the anhydrous solid composition is previously moistened and / or disintegrated in water before being applied to the keratin fibers. According to this embodiment, a small amount (preferably ranging from 1 to 3g) of anhydrous solid composition is advantageously taken and solubilized with water, for example in the hand, so as to form an abundant and immediate foam. The foam thus obtained can then be applied to the keratin fibers, dry or wet, before being optionally rinsed with water after a possible exposure time.

[0218] The present invention also relates to the use of an anhydrous solid composition as defined above for washing and / or conditioning keratin fibers, in particular human keratin fibers such as hair.

[0219] The present invention also relates to a packaging article, preferably cosmetic, comprising: - an envelope defining at least one cavity, the envelope comprising one or more water-soluble and / or fat-soluble compounds; - an anhydrous solid composition as defined above; it being understood that the anhydrous solid composition is located in one of the cavities defined by the envelope.

[0220] By "cosmetic packaging article" is meant an article suitable for cosmetic use; in particular for use of the packaging article on keratin fibers, in particular the hair and / or on the scalp. In particular, the packaging article makes it possible to wash and / or condition keratin fibers, in particular human keratin fibers such as the hair.

[0221] Preferably, the packaging article according to the invention is water-soluble or liposoluble at a temperature less than or equal to 35°C.

[0222] Preferably, the envelope of the packaging article according to the invention is water-soluble at a temperature less than or equal to 35°C.

[0223] By "water-soluble" is meant soluble in water, in particular at a rate of at least 10 grams per liter of water, preferably at least 20 g / l, better still at least 50 g / L at a temperature less than or equal to 35°C. Thus, when water preferably having a temperature less than 35°C is added to the packaging article, the envelope will dissolve and release the anhydrous solid composition present in one of the cavities of the envelope.

[0224] By "liposoluble" is meant soluble in a liquid fatty substance as defined below, in particular at a rate of at least 10 grams per liter of liquid fatty substance, in particular in a vegetable or mineral oil such as vaseline oil, preferably at least 20 g / l in a liquid fatty substance, better still at least 50 g / l in a fatty substance, at a temperature less than or equal to 35°C.

[0225] The term "temperature less than or equal to 35°C" means a temperature not exceeding 35°C but greater than or equal to 0°C, for example ranging from more than 1 to 35°C, preferably from 5 to 30°C, more preferably from 10 to 30°C, and better still from 15 to 25°C. It is understood that all temperatures are given at atmospheric pressure (1 atm).

[0226] The packaging article may comprise one or more cavities, at least one of which contains the anhydrous solid composition as defined above. Preferably, the packaging article comprises only one cavity in which the anhydrous solid composition is contained.

[0227] Advantageously, the envelope represents from 0.5 to 20% by weight, preferably from 1 to 15% by weight, more preferably from 2 to 10% by weight, and better still from 4 to 8% by weight, relative to the total weight of the packaging article.

[0228] Advantageously, the anhydrous solid composition as defined above represents from 80 to 99.5% by weight, preferably from 85 to 99% by weight, more preferably primarily from 90 to 98% by weight, and more preferably from 92 to 96% by weight, relative to the total weight of the packaging article.

[0229] The weight ratio between the total weight of the anhydrous solid composition of the invention and the total weight of the envelope advantageously ranges from 80 / 20 to 99 / 1, preferably from 85 / 15 to 98 / 2, and more preferably from 90 / 10 to 97 / 3.

[0230] The envelope of the packaging article comprises one or more water-soluble and / or liposoluble compounds, preferably one or more water-soluble compounds advantageously chosen from water-soluble polymers and their mixtures.

[0231] The water-soluble polymer(s) that can be used according to the present invention contain water-soluble units in their backbones. The water-soluble units are obtained from one or more water-soluble monomers.

[0232] By "water-soluble monomer" is meant a monomer whose solubility in water is greater than or equal to 1%, preferably greater than or equal to 5% at 25°C and at atmospheric pressure (760 mm Hg).

[0233] The said water-soluble polymer(s) capable of forming the envelope are advantageously obtained from water-soluble monomers comprising at least one double bond. The latter may be chosen from cationic, anionic, non-ionic monomers and their mixtures.

[0234] As water-soluble monomers capable of being used as precursors of the water-soluble units, alone or in a mixture, the following monomers may be cited as examples, which may be in free or salified form: - (meth)acrylic acid, - styrene sulfonic acid, - vinylsulfonic acid and (meth)allylsulfonic acid, - vinyl phosphonic acid, - N-vinylacetamide and N-methyl N-vinylacetamide, - N-vinylformamide and N-methyl N-vinylformamide, - N-vinyllactams comprising a cyclic alkyl group having from 4 to 9 carbon atoms, such as N-vinylpyrrolidone, N-butyrolactam and N-vinylcaprolactam, - maleic anhydride, - itaconic acid, - vinyl alcohol of formula CH2=CHOH, - vinyl acetate of formula CH2=CHOC(O)CH3, - vinyl ethers of formula CH2=CHOR in which R is a hydrocarbon radical, linear or branched, saturated or unsaturated, having from 1 to 6 carbon atoms, - dimethyldiallyl ammonium halides (chloride), - quaternized dimethylaminoethyl methacrylate (MADAME), - (meth)acrylamidopropyltrimethylammonium halides (chloride) (APTAC and MAPTAC), - methylvinylimidazolium halides (chloride), - 2-vinylpyridine and 4-vinylpyridine, - acrylonitrile, - glycidyl (meth)acrylate, - vinyl halides (chloride) and vinylidene chloride, - vinyl monomers of the following formula: H2C=C(R)-C(O)-X, in which: - R is selected from H, (Ci-C6)alkyl such as methyl, ethyl and propyl, and - X is chosen from: - alkoxy of the -OR' type where R' is a linear or branched, saturated or unsaturated hydrocarbon radical having from 1 to 6 carbons, optionally substituted by at least one halogen atom (iodine, bromine, chlorine, fluorine); a sulfonic group (-SO3), sulfate (SO4), phosphate (-PO4H2); hydroxy (-OH); primary amine (-NH2); secondary amine (NHR6), tertiary (-NR6R7) or quaternary (-N+R6R7RX) with R6, R7 and R8 being, independently of one another, a linear or branched, saturated or unsaturated hydrocarbon radical having 1 to 6 carbon atoms, provided that the sum of the carbon atoms of R' + R6 + R7 + R8 does not exceed 6; - the groups -NH2, -NHR' and -NR'R" in which R' and R" are independently of one another linear or branched, saturated or unsaturated hydrocarbon radicals having 1 to 6 carbon atoms, provided that the total number of carbon atoms of R' + R" does not exceed 6, said R' and R" being optionally substituted by a halogen atom (iodine, bromine, chlorine, fluorine); a hydroxy group (-OH); sulfonic (-SO3); sulfate (SO4); phosphate (-PO4H2); primary amine (-NH2); secondary (-NHR6), tertiary (NR6R7) and / or quaternary (-N+R6R7R8) amine with R6, R7 and R8 being, independently of each other, a linear or branched, saturated or unsaturated hydrocarbon radical having 1 to 6 carbon atoms, provided that the sum of the carbon atoms of R' + R” + R6 + R7 + R8 does not exceed 6. Examples of compounds having this formula include N,N-dimethylacrylamide and N,N-diethylacrylamide; and - and mixtures thereof.

[0235] As anionic monomers, mention may in particular be made of (meth)acrylic acid, acrylamido-2-methylpropanesulfonic acid, itaconic acid and their salts of an alkali metal, alkaline earth metal or ammonium or those derived from an organic amine such as alkanolamine.

[0236] As non-ionic monomers, mention may in particular be made of (meth)acrylamide, N-vinylformamide, N-vinylacetoamide and hydroxypropyl (meth)acrylate, vinyl alcohol of formula CH2=CHOH, and vinyl acetate of formula CH2=CHOC(O)CH3.

[0237] The cationic monomers are preferably chosen from quaternary ammonium salts derived from a diallylamine, and those corresponding to the following formula: H2C=C(R1)-D-N+R2R3R4, X in which: • Ri represents a hydrogen atom or a methyl group, • R2 and R3, identical or different, represent a hydrogen atom or a linear or branched C1 to C4 alkyl group, • R4 represents a hydrogen atom, a linear or branched C1 to C4 alkyl group or an aryl group, • D represents the following divalent motif: -(Y)n-(A)- in which: - Y represents an amide function, an ester (OC(O) or C(O)-O), a urethane or a urea, - A represents a linear or branched, cyclic or acyclic C1 to C10 alkylene group, which may be substituted or interrupted by a divalent aromatic or heteroaromatic group. The alkylene groups may be interrupted by an oxygen atom, a nitrogen atom, a sulfur atom or a phosphorus atom; the alkylene may be interrupted by a ketone function, an amide, an ester (OC(O) or C(O)-O), a urethane, or a urea, - n is an integer ranging from 0 to 1, • X represents an anionic counterion, such as chloride or sulfate.

[0238] Examples of water-soluble cationic monomers that may be mentioned include the following compounds and their salts: dimethylaminoethyl (meth)acrylate, (meth)acryloyloxyethyltrimethylammonium (meth)acrylate, (meth)acryloyloxyethyldimethylbenzylammonium (meth)acrylate, N-[dimethylaminopropyl](meth)-acrylamide (meth)acrylate, (meth)acrylamidopropyltrimethylammonium (meth)acrylate, (meth)acrylamidopropyldimethylbenzylammonium (meth)acrylate, dimethylaminohydroxypropyl (meth)acrylate, (meth)acryloyloxyhydroxypropyltrimethylammonium (meth)acrylate, (meth)acryloyloxyhydroxypropyldimethylbenzylammonium (meth)acrylate and dimethyldiallylammonium (meth)acrylate.

[0239] Among the water-soluble polymers that can be used according to the present invention, mention may also be made of polyhydroxyalcohol (PHA).

[0240] Preferably, the water-soluble polymers are polymerized from one or more monomers chosen from vinyl alcohol of formula CH2=CHOH, vinyl acetate of formula CH2=CHOC(O)CH3 and mixtures thereof.

[0241] The water-soluble polymers capable of forming the envelope of the article of packaging may also be chosen from water-soluble polymers derived from natural products, such as polysaccharides, i.e. polymers with sugar units. These water-soluble polymers are different from the cationic polysaccharide(s) (v) present in the anhydrous solid composition.

[0242] By "sugar unit" is meant a unit derived from a carbohydrate of formula Cn(H2O)ni or (CH2O)n which may optionally be modified by substitution and / or by oxidation and / or by dehydration. The sugar units capable of entering into the composition of the polymers of the invention are preferably derived from the following sugars: glucose, galactose, arabinose, rhamnose, mannose, xylose, fucose, fructose, anhydrogalactose, galacturonic acid, glucuronic acid, mannuronic acid, galactose sulfate, anhydrogalactose sulfate.

[0243] The polymers with sugar unit(s) according to the invention may be of natural or synthetic origin. They may be non-ionic, anionic, amphoteric or cationic. The basic units of the polymers with sugar unit of the invention may be mono- or disaccharides.

[0244] The following native gums and their derivatives may be mentioned in particular as polymers that can be used: (a) exudates from trees or shrubs including: - gum arabic (branched polymer of galactose, arabinose, rhamnose and glucuronic acid); - gum ghatti (polymer derived from arabinose, galactose, mannose, xylose and glucuronic acid); - karaya gum (polymer derived from galacturonic acid, galactose, rhamnose and glucuronic acid); - gum tragacanth (or tragacanth) (polymer of galacturonic acid, galactose, fucose, xylose and arabinose); b) gums derived from algae including: - agar (polymer made from galactose and anhydrogalactose); - alginates (polymers of mannuronic acid and glucuronic acid); - carrageenans and furcellerans (polymers of galactose sulfate and anhydrogalactose sulfate); (c) gums from seeds or tubers of which: - guar gum (polymer of mannose and galactose); - carob gum (polymer of mannose and galactose); - fenugreek gum (polymer of mannose and galactose); - tamarind gum (polymer of galactose, xylose and glucose); - konjac gum (polymer of glucose and mannose) whose main constituent is glucomannan is a high molecular weight polysaccharide (500,000 < M giu comannan < 2,000,000) composed of D-mannose and D-glucose units with a branching every 50 or 60 units or so; (d) microbial gums including: - xanthan gum (polymer of glucose, mannose acetate, mannose / pyruvic acid and glucuronic acid); - gellan gum (polymer of partially acylated glucose, rhamnose and glucuronic acid); - scleroglucan gum (glucose polymer); - biosaccharide gum (polymer of galacturonic acid, fucose and D-galactose), e) plant extracts including: - cellulose (glucose polymer); - starch (polymer of glucose); - inulin (polymer of fructose and glucose).

[0245] These polymers can be modified physically or chemically. As a physical treatment, temperature may be mentioned in particular. As chemical treatments, esterification, etherification, amidation and oxidation reactions may be mentioned. These treatments make it possible to produce polymers which may be non-ionic, anionic, cationic or amphoteric.

[0246] Preferably, these chemical or physical treatments are applied to guar gums, locust bean gums, starches and celluloses.

[0247] The non-ionic guar gums which can be used according to the invention can be modified by C1 to C6 hydroxyalkyl groups. Among the hydroxyalkyl groups, mention may be made of hydroxymethyl, hydroxyethyl, hydroxypropyl and hydroxybutyl groups.

[0248] These guar gums are well known in the state of the art and can for example be prepared by reacting corresponding alkene oxides such as for example propylene oxides with guar gum, so as to obtain a guar gum modified by hydroxypropyl groups.

[0249] The hydroxyalkylation rate preferably varies from 0.4 to 1.2 and corresponds to the number of alkylene oxide molecules consumed by the number of free hydroxyl functions present on the guar gum.

[0250] Such non-ionic guar gums optionally modified by hydroxyalkyl groups are for example sold under the trade names JAGUAR HP8, JAGUAR HP60 and JAGUAR HP120 by the company RHODIA CHIMIE.

[0251] The guar gums modified by cationic groups which can be used more particularly according to the invention are guar gums comprising cationic trialkylammonium groups. Preferably, 2 to 30% by number of the hydroxyl functions of these guar gums carry cationic trialkylammonium groups. Even more preferably, 5 to 20% of the number of hydroxyl functions of these guar gums are connected by cationic trialkylammonium groups. Among these trialkylammonium groups, mention may be made in particular of the trimethylammonium and triethylammonium groups. Even more preferably, these groups represent from 5 to 20% by weight relative to the total weight of the modified guar gum.

[0252] According to the invention, guar gums modified with 2,3-epoxypropyl trimethylammonium chloride can be used.

[0253] These guar gums modified by cationic groups are products already known in themselves and are for example described in patents US 3,589,578 and US 4,0131,307. Such products are also sold in particular under the trade names JAGUAR C13 S, JAGUAR C 15, JAGUAR C 17 by the company RHODIA CHIMIE.

[0254] As modified carob gum, cationic carob gum containing hydroxypropyltrimmonium groups such as Catinal CLB 200 offered by the company TOHO can be used.

[0255] The starch molecules used in the present invention may originate from any plant source of starch, in particular cereals and tubers; more particularly, they may be starches from corn, rice, cassava, barley, potato, wheat, sorghum, peas, oats, tapioca. Hydrolysates of the starches mentioned above may also be used. The starch is preferably derived from potatoes.

[0256] Starches can be modified chemically or physically, in particular by one or more of the following reactions: pregelatinization, oxidation, crosslinking, esterification, etherification, amidation, heat treatments.

[0257] More specifically, these reactions can be carried out in the following way: - pregelatinization by bursting the starch granules (e.g. drying and cooking in a drying drum); - oxidation by strong oxidants leading to the introduction of carboxyl groups into the starch molecule and to the depolymerization of the starch molecule (for example by treating an aqueous starch solution with sodium hypochlorite); - crosslinking by functional agents capable of reacting with the hydroxyl groups of the starch molecules which will thus be linked together (for example with glyceryl and / or phosphate groups); - esterification in alkaline medium for the grafting of functional groups, in particular C1-C6 acyl (acetyl), C1-C6 hydroxyalkyl (hydroxyethyl, hydroxypropyl), carboxymethyl, octenylsuccinic.

[0258] It is possible in particular to obtain by crosslinking with phosphorus compounds monostarch phosphates (of the Am-O-PO-(OX)2 type), distarch phosphates (of the Am-O-PO-(OX)-O-Am type) or even tristarch phosphates (of the Am-O-PO-(O-Am)2 type) or mixtures thereof; with Am meaning starch and X designating in particular alkali metals (for example sodium or potassium), alkali-earth metals (for example calcium, magnesium), ammonia salts, amine salts such as those of monoethanolamine, diethanolamine, triethanolamine, 3-aminopropanediol-1,2, ammonium salts derived from basic amino acids such as lysine, arginine, sarcosine, ornithine, citrulline.

[0259] The phosphorus compounds may be, for example, sodium tripolyphosphate, sodium orthophosphate, phosphorus oxychloride or sodium trimetaphosphate.

[0260] Mention may in particular be made of distarch phosphates or compounds rich in distarch phosphate such as the product offered under the references PREJEL VA-70-T AGGL (gelatinized hydroxypropyl cassava distarch phosphate) or PREJEL TK1 (gelatinized cassava distarch phosphate) or PREJEL 200 (gelatinized acetylated cassava distarch phosphate) by the company AVEBE or STRUCTURE ZEA from NATIONAL STARCH (gelatinized corn distarch phosphate).

[0261] A preferred starch is a starch that has undergone at least one chemical modification such as at least one esterification.

[0262] According to the invention, it is also possible to use amphoteric starches, comprising one or more anionic groups and one or more cationic groups. The anionic and cationic groups can be linked to the same reactive site of the starch molecule or to different reactive sites; preferably they are linked to the same reactive site. The anionic groups can be of the carboxylic, phosphate or sulfate type, and preferably carboxylic. The cationic groups can be of the primary, secondary, tertiary or quaternary amine type.

[0263] The amphoteric starches are in particular chosen from the compounds of the following formulas: R'K II C--c—COOM / HH St-O -(CHA —H 1 -HH C--C — COOM II (XVH) R> * R.. R" N ' I St - OC —C - COOM H, H (XIX) COOM JH HC — C — COGM R (XVIII) R' xr” h' i st-ac—c -coom HH, (XX) formulas (XVII) to (XX), in which: - St-0 represents a starch molecule; - R, identical or different, represents a hydrogen atom or a methyl radical; - R', identical or different, represents a hydrogen atom, a methyl radical or a -C(O)-OH group; - n is an integer equal to 2 or 3; - M, identical or different, denotes a hydrogen atom, an alkali or alkali-earth metal such as Na, K, Li, a quaternary ammonium NH4, or an organic amine; and - R" represents a hydrogen atom or a C1-C18 alkyl radical.

[0264] These compounds are notably described in US5455340 and US4017460.

[0265] Particular use is made of starches of formulas (XVIII) or (XIX); and preferably starches modified with 2-chloroethylaminodipropionic acid, i.e. starches of formula (XVIII) or (XIX) in which R, R', R" and M represent a hydrogen atom and n is equal to 2. Preferably, the amphoteric starch is a starch chloroethylamido dipropionate.

[0266] Celluloses and cellulose derivatives can be anionic, cationic, amphoteric or non-ionic.

[0267] Among these derivatives, we distinguish cellulose ethers, cellulose esters and cellulose ether esters.

[0268] Among the cellulose esters, mention may be made of inorganic cellulose esters (nitrates, sulfates or phosphates of cellulose), organic cellulose esters (monoacetates, triacetates, amidopropionates, acetatebutyrates, acetatepropionates or acetatetrimellitates of cellulose) and mixed organic / inorganic cellulose esters such as cellulose acetatebutyratesulfates and acetatepropionate sulfates.

[0269] Among the cellulose ether esters, mention may be made of hydroxypropyl phthalates me- ethylcellulose and ethylcellulose sulfates.

[0270] Among the non-ionic cellulose ethers, mention may be made of alkylcelluloses such as methylcelluloses and ethylcelluloses (for example Ethocel standard 100 Premium from DOW CHEMICAL); hydroxyalkylcelluloses such as hydroxymethylcelluloses, hydroxyethylcelluloses (for example Natrosol 250 HHR offered by AQUALON) and hydroxypropylcelluloses (for example Klucel EF from AQUALON); mixed hydroxyalkylalkylcelluloses such as hydroxypropylmethylcelluloses (for example Methocel E4M from DOW CHEMICAL), hydroxyethylmethylcelluloses, hydroxyethylethylcelluloses (for example Bermocoll E 481 FQ from AKZO NOBEL) and hydroxybutylmethylcelluloses.

[0271] Among the anionic cellulose ethers, mention may be made of carboxyalkylcelluloses and their salts. As an example, mention may be made of carboxymethylcelluloses, carboxymethylmethylcelluloses (for example Blanose 7M from the company AQUALON) and carboxymethylhydroxyethylcelluloses, as well as their sodium salts.

[0272] Among the cationic cellulose ethers, mention may be made of crosslinked or non-crosslinked quaternized hydroxyethylcelluloses. The quaternizing agent may in particular be diallyldimethylammonium chloride (for example Celquat L200 from NATIONAL STARCH). As another cationic cellulose ether, mention may be made of hydroxyethyl cellulose hydroxypropyltrimethylammonium (for example Ucare polymer JR 400 from AMERCHOL).

[0273] Among the associative polymers with sugar unit(s), mention may be made of celluloses or their derivatives, modified by groups comprising at least one fatty chain such as alkyl, arylalkyl, alkylaryl groups or their mixtures where the alkyl groups are C8-C22; non-ionic alkylhydroxyethylcelluloses such as the products NATROSOL PLUS GRADE 330 CS and POLYSURF 67 (C16 alkyl) sold by the company AQUALON; quaternized (cationic) alkylhydroxyethylcelluloses such as the products QUATRISOFT LM 200, QUATRISOFT LM-X 529-18-A, QUATRISOFT LM-X 529-18-B (C12 alkyl) and QUATRISOFT LM-X 529-8 (C[8 alkyl) sold by the company AMERCHOL, the products CRODACEL QM, CRODACEL QL (C12 alkyl) and CRODACEL QS (C[8 alkyl) sold by the company CRODA and the product SOFTCAT SL 100 sold by the company AMERCHOL; non-ionic nonoxynylhydroxyethylcelluloses such as the product AMERCELL HM-1500 sold by the company AMERCHOL;non-ionic alkylcelluloses such as the product BERMOCOLL EHM 100 sold by the company BEROL NOBEL.;

[0274] As polymers with sugar unit(s) derived from associative guar, mention may be made of hydroxypropylguars modified by a fatty chain such as the product ESAFLOR HM 22 (modified by a C22 alkyl chain) sold by the company LAMBERTI; the product MIRACARE XC 95-3 (modified by a C14 alkyl chain) and the product RE 205-146 (modified by a C2o alkyl chain) sold by RHODIA CHIMIE.

[0275] The water-soluble polymer(s) with sugar unit(s) that can be used to form the envelope of the packaging article are preferably chosen from guar gums, carob gums, xanthan gums, starches and celluloses, in their modified (derivatives) or unmodified form.

[0276] Preferably, said polymer(s) with sugar unit(s) are non-ionic.

[0277] The water-soluble polymers described above more particularly have a weight-average molecular weight (Mw) greater than 1,000,000 and preferably between 1,000,000 and 50,000,000. The molecular weight is determined by the RSV (Reduced Specified Viscocity) method as defined in "Principles of Polymer Chemistry" Cornell University Press, Ithaca, NY 1953 Chapter VII "Determination of molecular Weight" pp 266-316.

[0278] The water-soluble or liposoluble compound(s) capable of forming the envelope of the packaging article according to the invention may be in the form of fibers or film.

[0279] According to a first embodiment, the water-soluble or fat-soluble compound(s) are in the form of fibers. By "fiber" is meant any object whose length is greater than its cross-section. In other words, it is necessary to understand an object of length L and diameter D such that L is greater and preferably much greater (i.e. at least 3 times greater) than D, D being the diameter of the circle in which the cross-section of the fiber is inscribed. In particular, the ratio L / D (or form factor) is chosen in the range from 3.5 to 2500, preferably from 5 to 500, and better still from 5 to 150. The cross-section of a fiber can be of any shape, round, serrated or grooved, or even bean-shaped, but also multi-lobed, in particular tri-lobed or penta-lobed, X-shaped, ribbon-shaped, square, triangular, elliptical, or other. The fibers of the invention can be hollow or non-hollow.

[0280] According to this embodiment, the fibers can be spun, carded or twisted. Advantageously, the fibers used in the context of the present invention are spun. The average diameter of the fibers used according to the present invention, identical or different, is less than 500 μm. Advantageously, such a diameter is less than 200 μm, preferably less than 100 μm, or even less than 50 μm.

[0281] Mention may more particularly be made of water-soluble fibers which include PVA (polyvinyl alcohol) based fibers, polysaccharide fibers such as glucomannans, starches, celluloses such as carboxymethylcelluloses, polyalginic acid fibers, polylactic acid fibers, and polyalkyleneoxide fibers, as well as mixtures thereof. More preferably, the water-soluble fiber(s) used in the invention are chosen from PVA-based fibers.

[0282] The fibers of the envelope are generally entangled. The term " casing comprising water-soluble fibers”, a casing which may consist entirely of water-soluble fibers which may comprise both water-soluble fibers and fibers insoluble in water at a temperature of 35°C or less, the soluble fibers being in greater quantity than the insoluble fibers. The fiber casing must comprise at least 60% by weight of soluble fibers, preferably at least 70% and more preferably at least 80% by weight relative to the total weight of the fibers. It may thus comprise, for example, more than 95% by weight, or even more than 99% by weight and even 100% by weight of water-soluble fibers relative to the total weight of the fibers in the casing.

[0283] When the envelope contains insoluble fibers, these may be made of any material usually used as insoluble fibers; for example, these may be fibers of silk, cotton, wool, linen, polyamide (Nylon®), polylactic acid, modified cellulose (rayon, viscose, rayon acetate), poly-p-phenylene terephthalamide, in particular Kevlar®, polyolefin, in particular polyethylene or polypropylene, glass, silica, aramid, carbon, in particular in graphite form, Teflon®, insoluble collagen, polyesters, polyvinyl chloride or vinylidene chloride, polyethylene terephthalate, fibers formed from a mixture of the compounds mentioned above, such as polyamide / polyester or viscose / polyester fibers.

[0284] Furthermore, when the envelope contains fibers, it may be woven or non-woven.

[0285] According to a first variant of the invention, the envelope can be woven. In the context of the present invention, a “woven” material results from an organized assembly of fibers, in particular water-soluble polymeric fibers, and more particularly from an interweaving, in the same plane, of said fibers, arranged in the direction of the warp and of fibers arranged, perpendicular to the warp fibers, in the direction of the weft. The bond obtained between these warp and weft fibers is defined by an armor.

[0286] Such a woven material results from an operation aimed at assembling the fibers in an organized manner such as weaving itself, but can also result from knitting.

[0287] According to another variant of the invention, the envelope is non-woven.

[0288] For the purposes of the present invention, the term “non-woven” means a substrate comprising fibers, in particular water-soluble polymeric fibers, in which the individual fibers are arranged haphazardly in a web-like structure and which are neither woven nor knitted. The fibers of the nonwoven are generally bonded together, either by mechanical action (e.g. needling, air jet, water jet), by thermal action, or by the addition of a binder.

[0289] Such a nonwoven is for example defined by the ISO 9092 standard as a veil or a sheet of directionally or randomly oriented fibers, bonded by friction and / or cohesion and / or adhesion, excluding paper and products obtained by weaving, knitting, tufting or sewing incorporating binding yarns or filaments.

[0290] A nonwoven differs from a paper by the length of the fibers used. In paper, the fibers are shorter. However, there are nonwovens based on cellulose fibers that are manufactured by wet process and have short fibers like in paper. The difference between a nonwoven and a paper is generally the absence of hydrogen bonding between the fibers in a nonwoven.

[0291] Very preferably, the fibers used in the context of the present invention are chosen from synthetic fibers such as PVA fibers. In particular, the envelope is non-woven, and preferably made of non-woven PVA fibers.

[0292] To produce the non-woven envelope of the packaging article, PVA fibers are preferably used that are soluble in water at a temperature of less than or equal to 35°C, such as, for example, the fibers sold by the Japanese company Kuraray under the name KURALON K-II, and particularly the WN2 grade soluble from 20°C. These fibers are described in document EP-A-636716 which teaches the manufacture of PVA fibers that are soluble in water at temperatures not exceeding 100°C, by spinning and stretching the polyvinyl alcohol polymer in the dry or wet state in the presence of solvents involved in the solubilization and solidification of the fiber. The fiber thus obtained can lead to the production of woven or non-woven substrates.

[0293] These fibers can also be prepared from a spinning solution by dissolving a water-soluble PVA-based polymer in a first organic solvent, spinning the solution in a second organic solvent to obtain solidified filaments and wet-drawing the filaments from which the first solvent is removed and then dried and subjected to a heat treatment. The cross-section of these fibers can be substantially circular. These fibers have a tensile strength of at least 2.7 g / dtex (3 g / d). Application EP-A-0 636 716 describes such water-soluble PVA-based fibers and their method of manufacture.For example, the fibers can also be formed by extrusion and deposited on a conveyor to form a fiber web which is then consolidated by a conventional fiber bonding technique, such as for example needling, hot bonding, calendering or air-through bonding, a technique in which the water-soluble web passes through a tunnel where hot air is blown, or hydrobonding aimed at bonding the fibers under the action of fine jets of water under very high pressure, which cannot be applied to fibers whose dissolution temperature is too low.

[0294] As we have seen previously, the invention is not limited to the use of PVA, and it is also possible to use fibers made from other water-soluble materials provided that these materials dissolve in water having the temperature desired temperature, for example polysaccharide fibers marketed under the name LYSORB by the company LYS AC TECHNOLOGIES, INC or other fibers based on polysaccharide polymers such as glucomannans or starch.

[0295] The casing may comprise a mixture of different fibers soluble in water at different temperatures (up to 35°C).

[0296] The fibers may be composite, and they may comprise, for example, a core and a sheath which are not of the same nature, for example formed from different grades of PVA.

[0297] According to a particular embodiment of the invention, the envelope is a non-woven fabric, comprising water-soluble fibers, alone or mixed with insoluble fibers as indicated above, with at most 40% by weight of insoluble fibers relative to the total weight of the fibers constituting the sheet. Preferably, the non-woven fabric consists essentially of water-soluble fibers, that is to say that it does not contain insoluble fibers.

[0298] According to another embodiment of the invention, the envelope of the packaging article may consist of one or more films, each of which comprises one or more water-soluble and / or liposoluble compounds, in particular as defined above. When the envelope consists of several films, said films may be assembled, for example glued together, in order to form only one unitary film.

[0299] The thickness of the “overall” film (i.e. the thickness of the single film when the envelope contains only one or of the unitary film when the envelope contains several films) is advantageously between 10 and 1000 microns, preferably between 10 and 800 microns, and more preferably between 15-500 microns.

[0300] Film is understood to mean in particular a continuous layer preferably formed from one or more water-soluble and / or liposoluble compounds as defined above, in particular polymer(s).

[0301] The main industrial methods for producing polymer films are extrusion of a molten polymer, casting of a solution of a polymer onto a polished metal surface (in some cases, the polymer solution is introduced into a precipitation tank), casting of a dispersion of the polymer onto a polished surface and calendering.

[0302] The films usable according to the present invention can be chosen from multilayer film-film, film-paper (coating) and film-coating.

[0303] When applied by spraying, brushing or various industrial processes, surface coatings undergo so-called film formation, and in particular film-coating. In most film-forming processes, a relatively low-viscosity liquid coating is applied to a solid substrate and cured into a solid, adherent film based on a high molecular weight polymer. lecular having the properties desired by the user.

[0304] The films which can be used according to the present invention are in particular PVA films which can be manufactured using any industrial production method, such as a method of casting a PVA-based polymer solution, an extrusion method in the presence or absence of water, a dry extrusion molding method or a biaxial orientation method.

[0305] The packaging article, as well as the envelope, may have any shape suitable for the intended use, for example a rectangular, round or oval shape. Preferably, it has a rounded geometry, for example in the form of a sphere, a disc, or an oval, or else square or parallelepiped, preferably with rounded corners. The envelope preferably has dimensions allowing it to be grasped between at least two fingers. Thus, it may have, for example, an ovoid shape of approximately 2 to 10 cm long and approximately 0.5 to 4 cm wide, or a circular disc shape of approximately 2 to 10 cm in diameter, or a square shape of approximately 2 to 15 cm on each side, or a rectangle shape of approximately 2 to 25 cm in length, it being understood that it may have any other shape and dimension suitable for the intended use.

[0306] Preferably, the envelope may be round in shape with an internal diameter ranging from 3 to 7 cm, more preferably from 4 to 5 cm; to which may be added the dimension of the edges (sealed part) which may range from 1 to 5 mm, better still from 2 to 4 mm; and a height ranging from 2 to 7 mm, preferably from 3 to 5 mm.

[0307] The envelope may also be square or rectangular in shape with a length preferably ranging from 2 to 6 cm, more preferably from 3 to 5 cm, and a width preferably ranging from 2 to 5 cm, more preferably 2.5 to 4 cm; to which may be added the dimension of the edges (sealed part) which may preferably range from 1 to 5 mm, and more preferably from 2 to 4 mm.

[0308] Advantageously, the envelope has a low thickness, and can be made up of several layers of different materials. Preferably the thickness of the envelope ranges from 3 to 99.9% of its other dimensions. The envelope is thus substantially flat, with thin edges.

[0309] The surface delimiting the cavity(ies) has an area advantageously less than 625 cm2, preferably between 0.025 cm2 and 400 cm2, more preferably between 1 and 200 cm2, better still between 2 and 50 cm2, and better still between 4 and 25 cm2, in order to have optimized compaction of the composition. It has been observed that when the surface of the article is in the above ranges, the compaction of the anhydrous solid composition into powder is lower and the transformation of the powder into a fluid composition in the hands is done more easily, without the formation of agglomerates.

[0310] Preferably, the height of the envelope is greater than or equal to 2mm, more preferably- The potential range is from 2 to 10mm, and even better from 3 to 7mm.

[0311] Preferably, the film(s) used in the context of the present invention are chosen from synthetic films, such as PVA or PVOH films, as well as their mixtures.

[0312] Preferably, the envelope is made up of several layers, for example, 2 or 3 layers, of films each made, preferably, of different materials. Advantageously, at least one of these films is a film comprising or consisting of PVA and / or PVOH.

[0313] Preferably, the film(s) are sealed to form one or more cavities that will comprise the anhydrous solid composition of the invention and prevent it from escaping.

[0314] Advantageously, the packaging article comprises from 1 to 5g, preferably from 2 to 4.5g of anhydrous solid composition; and from 0.1 to 0.8g, preferably from 0.2 to 0.5g of envelope.

[0315] The present invention further relates to a method for the cosmetic treatment of keratin fibers, in particular human keratin fibers such as hair, comprising a step of implementing a packaging article as defined above, preferably, said cosmetic treatment method comprises the following steps: (i) mixing the packaging article in a composition capable of dissolving, in whole or in part, the envelope of said packaging article, ii) apply the composition obtained in step i) to the keratin fibers, iii) optionally leave to stand, iv) rinse said keratin fibers, and v) optionally drying said keratin fibers.

[0316] It is understood that the composition capable of solubilizing the envelope depends on the nature of the envelope. In other words, the composition capable of solubilizing the envelope is water or an aqueous composition, when the packaging article contains mainly or only a hydrophilic envelope. And, the composition capable of solubilizing the envelope is an organic anhydrous composition or an aqueous composition comprising at least one liquid fatty substance or at least one organic solvent different from the liquid fatty substances such as lower monoalcohols, for example ethanol, or such as polyols, for example propylene glycol or glycerin, when the packaging article contains mainly or only a lipophilic envelope.

[0317] Thus, the aqueous composition may simply be water. The aqueous composition may optionally comprise at least one polar solvent. Among the polar solvents that can be used in this composition, mention may be made of gold compounds liquid organics at room temperature (25°C) and at least partially miscible with water.

[0318] By way of example, mention may be made more particularly of alkanols such as ethyl alcohol, isopropyl alcohol, aromatic alcohols such as benzyl alcohol, and phenylethyl alcohol, or polyols or polyol ethers such as, for example, monomethyl, monoethyl and monobutyl ethers of ethylene glycol, propylene glycol or its ethers such as, for example, monomethyl ether of propylene glycol, butylene glycol, dipropylene glycol as well as alkyl ethers of diethylene glycol such as, for example, monoethyl ether or monobutyl ether of diethylene glycol.

[0319] More particularly, if one or more solvents are present, their respective content in the aqueous composition varies from 0.5 to 20% by weight, and preferably from 2 to 10% by weight, relative to the weight of said aqueous composition.

[0320] The dilution ratio (expressed by weight) between one or more packaging articles, as defined above, and the composition capable of solubilizing the packaging article(s) is preferably between 10 / 90 and 90 / 10, and more preferably between 10 / 90 and 50 / 50. Better still, this dilution ratio is 20 / 80.

[0321] In particular, the composition obtained at the end of the mixing (step i) of the process) can be applied to dry or wet keratin fibers. It is advantageously left to apply on the keratin fibers for a period ranging from 1 to 15 minutes, preferably from 2 to 10 minutes.

[0322] Then, the keratin fibers are rinsed with water. They can optionally be washed with shampoo, followed by rinsing with water, before being dried or left to dry.

[0323] The present invention also relates to the use of a conditioning article, as defined above, for washing and / or conditioning keratin fibers, and in particular human keratin fibers such as hair.

[0324] The following examples serve to illustrate the invention without, however, being limiting in nature. Examples

[0325] Example 1 The following anhydrous solid compositions Al and A2 according to the invention were prepared from the ingredients whose contents are indicated in the table below (% in g of active material). [Tables 1] Composition Al Composition A2 Sodium cocoyl isethionate 10.2 7.3 Sodium lauroyl glutamate 23 16.5 Cocamidopropyl betaine 10.1 7.2 Hydroxypropyl guar hydroxypropyl trimonium chloride 0.8 0.8 Propylene glycol - 3.0 Cetearyl glucoside - 1.2 Corn starch Qsp 100 Qsp 100 R 2.25 2.26

[0326] The compositions Al and A2 thus obtained are in the form of anhydrous powder (their water content (from the raw materials) is less than 0.2% by weight, relative to the total weight of the composition) and they can be used for washing hair. After mixing with water, for example in the hand, they disintegrate easily and quickly, resulting in a rich and creamy lather, which can then be applied to the hair and distributed easily. After rinsing, the washed hair is smooth and supple and detangles easily.

[0327] Compositions A1 and A2 are then packaged in powder form in a water-soluble sachet based on PVOH. The packaging article thus obtained can then be used as a washing composition: it is placed in the palm of the hand, water is added to it in order to solubilize it and possibly form a foam, then it is applied to the hair, preferably previously moistened.

[0328] Example 2 Composition (A2) according to the invention and comparative compositions (B1) to (B2) were prepared from the ingredients whose contents are indicated in Table 1 below (% in g of active material). [Tables 2] Composition A2 (invention) Composition B1 (comparative) Composition B2 (comparative) Sodium cocoyl isethionate 7.3 7.3 7.3 Sodium lauroyl glutamate 16.5 16.5 16.5 Cocamidopropyl betaine 7.2 7.2 7.2 Hydroxypropyl guar hydroxypropyl trimonium chloride 0.8 0.8 0.8 Propylene glycol 3.0 3.0 3.0 Cetearyl glucoside 1.2 1.2 1.2 Corn starch Qsp 100 - - Mica - Qsp 100 - Kaolin - - Qsp 100 R 2.26 2.26 2.26

[0329] b) Protocol 0.2g of each of the compositions (A2) and (B1)-(B2) were applied to 2.7g strands of natural hair previously wetted. The strands were then massaged for 20 seconds with the fingers before being rinsed with water and dried. The feel of the hair strands (wet and dry) was then assessed by a panel of three experts and compared to the feel obtained with a classic shampoo (DOP shampoo, paired comparison). For each composition, each expert awarded a score ranging from -3 to 3 depending on the quality of the feel; 0 corresponds to a feel equivalent to that obtained with classic shampoo, while -3 and 3 correspond to a feel respectively worse or better than that obtained with classic shampoo.

[0330] c) Results The results obtained are given in the table below (average value of the marks awarded by the 3 experts). [Tables 3] Touch on damp hair Touch on dry hair Composition A2 +2 +1 Composition B1 0 +1 Composition B2 +1 -1

[0331] The results obtained above show that the composition according to the invention (A2), comprising in particular a particular organic filler, gives a more pleasant feel to the hair than the comparative compositions (B1) and (B2) comprising mineral fillers.

[0332] Example 3

[0333] The anhydrous solid composition A3 according to the following invention was prepared from the ingredients whose contents are indicated in the table below (% in g of active material). [Tables 4] Composition A3 Sodium cocoyl isethionate 10.2 Sodium lauroyl glutamate 23 Cocamidopropyl betaine 10 Hydroxypropyl guar hydroxypropyl trimonium chloride 0.6 Magnesium stearate 5 Sodium bicarbonate 3.75 Citric acid 1.25 Sodium chloride 1.8 Perfume 3.5 Corn starch Qsp 100 R 2.25

[0334] 3g of composition A3 thus obtained are mixed with water. The composition disintegrates easily and quickly in the hands and leads to an abundant foam and creamy. The foam is then applied to the hair and spreads easily. After rinsing, the washed hair is smooth and supple and detangles easily.

Claims

Claims

1.

2.

3. Anhydrous solid composition comprising: (i) one or more sulfonate anionic surfactants, (ii) one or more carboxylate anionic surfactants, (iii) one or more amphoteric or zwitterionic surfactants, and (iv) one or more polymeric organic fillers; the weight ratio between the total content of carboxylate type anionic surfactant(s) (ii) and the total content of sulfonate type anionic surfactant(s) (i) being greater than or equal to 0.

6. Composition according to claim 1, characterized in that the anionic surfactant(s) of sulfonate type are chosen from alkyl sulfonates, alkylamide sulfonates, alkylaryl sulfonates, alpha-olefin sulfonates, paraffin sulfonates, alkylsulfosuccinates, alkylethersulfosuccinates, alkylamidesulfosuccinates, alkylsulfoacetates, sulfolaurates, N-acyltaurates, acylisethionates, as well as their salts and their mixtures; the alkyl groups of these compounds comprising from 8 to 30 carbon atoms, preferably from 8 to 26, and more preferably from 10 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, and more preferably from 2 to 10 ethylene oxide units. Composition according to any one of the preceding claims, characterized in that the anionic surfactant(s) of sulfonate type are chosen from the compounds of formula (I): RrCOX-R2-SO3M (I) formula (I), in which: - Ri represents a linear or branched alkyl group, preferably linear, comprising from 8 to 30 carbon atoms, preferably from 8 to 26 carbon atoms, and more preferably from 10 to 22 carbon atoms, - X represents an oxygen atom or a -N(CH3)- or -NH- group, preferably an oxygen atom, - R2 represents a linear or branched alkyl group, comprising from 1 to 4 carbon atoms, and - M denotes a hydrogen atom, an ammonium ion, an ion from an alkali or alkaline earth metal or an ion from an organic amine.

4. Composition according to any one of the preceding claims, characterized in that the total content of the anionic surfactant(s) of sulfonate type ranges from 1 to 30% by weight, preferably from 3 to 25% by weight, preferentially from 5 to 20% by weight, and better still from 8 to 16% by weight, relative to the total weight of the composition.

5. Composition according to any one of the preceding claims, characterized in that the carboxylate-type anionic surfactant(s) are chosen from the compounds of formula (II): R-(OCH2CH2)nW-(CHY1)p-COOX (II) formula (II), in which: - Yi denotes a hydrogen atom, a (CH2)qCOOX group or a hydroxyl group; - W denotes an oxygen atom, a (O-Glu-O)r-(COCH(Y 2)-(C(OH)COOX)t)s group or a CO-NR3 group; - Y2 denotes a hydrogen atom or a hydroxyl group; - R3 denotes a hydrogen atom or a methyl group; - X denotes a hydrogen atom, an ammonium ion, an ion derived from an alkali or alkali-earth metal or an ion derived from an organic amine; - R denotes a linear or branched alkyl group, preferably linear, comprising from 8 to 30 carbon atoms, preferably from 8 to 26 carbon atoms, and more preferably from 10 to 22 carbon atoms;- Glu denotes a divalent radical derived from glucopyranose with the removal of 2 hydroxyl groups; - p is equal to 0 or 1; - q denotes an integer ranging from 1 to 10; - n denotes an integer ranging from 0 to 50; - r denotes a number ranging from 1 to 10; - s is equal to 0 or 1; and -1 is equal to 0 or 1.;

6. Composition according to the preceding claim, characterized in that the anionic surfactant(s) of carboxylate type are chosen from the compounds of formula (II) for which: - n=0, p=1, Yi=H, W=C0NH (the N-acylglycinates), - n=0, p=1, W= CON(CH3) and Yi = H (the N-acylsarcosinates), and - n=0, p=1, W =CONH and Y! = CH2CH2COOX (the N-acylglutamates).

7. Composition according to any one of the preceding claims, characterized in that the total content of the anionic surfactant(s) of carboxylate type ranges from 1 to 40% by weight, preferably from 2 to 35% by weight, more preferably from 5 to 30% by weight, and better still from 10 to 25% by weight, relative to the total weight of the composition.

8. Composition according to any one of the preceding claims, characterized in that the weight ratio between the total content of anionic surfactant(s) of carboxylate type (ii) and the total content of anionic surfactant(s) of sulfonate type (i) ranges from 0.6 to 5, preferably from 0.7 to 4.5, more preferably from 0.8 to 4, better still from 1 to 3.5, and even better still from 1.1 to 3.

9. Composition 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-C20)amidoalkyl(C3-C8)betaines, and mixtures thereof; and preferably from alkyl(C8-C2o)amidoalkyl(C3-C8)betaines and mixtures thereof.

10. Composition according to any one of the preceding claims, characterized in that the total content of surfactants is less than or equal to 60% by weight, preferably ranging from 20 to 55% by weight, more preferably from 30 to 50% by weight, and better still from 35 to 45% by weight, relative to the total weight of the composition.

11. Composition according to any one of the preceding claims, characterized in that the polymeric organic filler(s) are chosen from cyclodextrins, starches, alginates, gellans, guar gum, celluloses, wood flours, crosslinked polyvinyl pyrrolidones, polyacrylates and their mixtures, preferably from celluloses, starches and their mixtures, and more preferably from starches and their mixtures.

12. Composition according to any one of the preceding claims, characterized in that the total content of the polymeric organic filler(s) is greater than or equal to 20% by weight, preferably greater than or equal to 30% by weight, more preferably greater than or equal to 35% by weight, better still this total content ranges from 20 to 80% by weight, even more preferably from 30 to 70% by weight, and even better still from 35 to 60% by weight, relative to the total weight of the composition.

13. Composition according to any one of the preceding claims, characterized in that it comprises one or more cationic polymers, different from the polymeric organic fillers.

14. Process for the cosmetic treatment of keratin fibers, in particular human keratin fibers such as hair, comprising the application to said keratin fibers of an anhydrous solid composition as defined in any one of the preceding claims; the anhydrous solid composition being applied directly to said keratin fibers or after having been previously moistened with water.

15. Packaging article comprising: - an envelope defining at least one cavity, the envelope comprising one or more water-soluble and / or fat-soluble compounds; - an anhydrous solid composition as defined in any one of claims 1 to 13; it being understood that the anhydrous solid composition is located in one of the cavities defined by the envelope.

16. A process for the cosmetic treatment of keratin fibers, in particular human keratin fibers such as hair, comprising a step of implementing a conditioning article as defined in claim 15, preferably, said cosmetic treatment process comprises the following steps: i) mixing the conditioning article in a composition capable of solubilizing, in whole or in part, the envelope of said conditioning article, ii) applying the composition obtained in step i) to the keratin fibers, iii) optionally leaving to stand, iv) rinsing said keratin fibers, and v) optionally drying said keratin fibers.

17. Use of an anhydrous solid composition as defined in any one of claims 1 to 13 or of a conditioning article as defined in claim 15 for washing and / or conditioning keratin fibers, in particular human keratin fibers such as hair.