FR2995528A1 - Composition in compressed form, useful for bleaching e.g. human hair, comprises persulfate, and cationic surfactant consisting of fatty tertiary amines, optionally polyoxyalkylenated or their salts and/or quaternary ammonium salts - Google Patents

Abstract

Composition in compressed form comprises at least one persulfate, and at least one cationic surfactant consisting of fatty tertiary amines, optionally polyoxyalkylenated or their salts and/or quaternary ammonium salts. An independent claim is included for bleaching keratin fibers comprising applying a composition on the keratin fibers in presence of an aqueous composition.

Description

The present invention relates to a composition for bleaching keratinous fibers, in particular hair, in compressed form, comprising at least one persulfate and at least one cationic surfactant. particular. The fading of human keratinous fibers, and more particularly of the hair, is by oxidation of the pigment "melanin" resulting in the solubilization and the partial or total elimination of this pigment.

To bleach the hair, use is made in particular of bleaching powders containing a peroxygenated reagent such as persulfates, perborates and percarbonates, of ammonium or of alkali metals, which are associated at the moment of use with an aqueous composition of peroxide peroxide. 'hydrogen. Since peroxygenated salts and hydrogen peroxide are relatively inefficient in acidic medium, it is often necessary to activate them at basic pH in order to obtain an adequate formation of active oxygen. It is therefore customary to add to the bleaching powders, alkaline compounds such as silicates and di or tribasic alkali or alkaline earth metal phosphates, and in particular alkali metal metasilicates, optionally in the presence of precursor agents. ammonia such as ammonium salts. Bleaching powders, however, tend to form dust during handling, transport and storage. However, the products that compose them (persulfates, alkali silicates) are aggressive and in particular irritating to the eyes, the respiratory tract and the mucous membranes.

In order to overcome the volatility problem of bleaching powders, less volatile powders have been developed by adding additives making it possible to reduce the level of fine particles and pastes comprising said pulverulent agents (peroxygenated salts, alkaline agents, thickeners) in an organic inert liquid carrier. However, these less volatile powders and pastes may be less effective than simple starting powders. Pasta, as well as powders, nevertheless require certain precautions when handling, especially when it comes to weigh them to mix with the oxidizing composition, to avoid staining clothes.

The object of the present invention is to provide a composition for the bleaching of keratinous fibers which makes it possible to solve the handling problems of the known compositions of the prior art, in particular a composition for the bleaching of keratin fibers in compressed form, comprising a persulfate and a particular cationic surfactant, to be mixed directly at the time of use with an aqueous composition. This composition makes it possible to avoid handling problems related to the volatility of the powders or the weighing problems by proposing a product in the form of a compact solid and ready to use, without a dosage step. It also makes it possible to improve the resistance of the composition for the bleaching of keratinous fibers to temperature variations, and in particular makes it possible to avoid the problem of destabilization during storage at low temperatures and during transport including temperature cycles. It also prevents loss of lightening power. These objects are achieved with the present invention which relates to a composition for bleaching keratin fibers in compressed form comprising at least one persulfate and at least one cationic surfactant chosen from tertiary fatty amines, optionally polyoxyalkylenated, or salts thereof, quaternary ammonium salts, and mixtures thereof The composition according to the invention is in compressed or compacted form, that is to say that it has been obtained by a process of compression (or compaction) of particles, in particular by compressing or compacting a powder or granules. Preferably, the discoloration composition in compressed form according to the invention has at least one dimension greater than 6 mm, preferably greater than or equal to 8 mm, preferably greater than or equal to 10 mm. In particular, it has at least one smaller dimension and at least one larger dimension, the largest dimension being greater than 6 mm, preferably greater than or equal to 8 mm, preferably greater than or equal to 10 mm.

The composition according to the invention may be in the form of a tablet, in particular a tablet, lozenge, roller, etc., which may have flat or convex, concave or convex upper and lower faces and round, oval or square shapes, rectangular, octagonal, polygonal. According to one embodiment, the composition in compressed form may for example be in the form of a tablet or tablet of round shape; it may have a diameter ranging from 0.5 to 5 cm, in particular from 2 to 4 cm and a thickness ranging from 1 to 20 mm, in particular from 3 to 10 mm.

According to one embodiment, the compressed form composition may be in the form of a tablet, it may have a length of 1 to 10 cm, a width of 0.5 to 5 cm and a thickness of 0.5 to 20 cm. mm, in particular from 1 to 10 mm. The composition in compressed form according to the invention may have a mass ranging from 0.5 to 20 grams, preferably from 5 to 15 grams. The composition according to the invention in compressed form may also be in the form of a tablet or tablet of round shape, it may then have a diameter ranging from 0.5 to 3 cm, in particular from 1 to 2 cm, and a thickness ranging from 1 to 20 mm, in particular 3 to 10 mm. It can thus have a mass ranging from 0.5 to 10 grams. The subject of the present invention is also a method for bleaching keratinous fibers, comprising applying to the keratin fibers the bleaching composition defined above, in the presence of an aqueous composition. The present invention also relates to a multi-compartment device comprising: - a bleaching composition in compressed form comprising at least one persulfate and at least one cationic surfactant chosen from tertiary fatty amines, optionally polyoxyalkylenated or their salts, quaternary ammonium salts, and mixtures thereof and an aqueous composition, said compositions being packaged in separate compartments. Unless otherwise indicated, the ranges of the ranges of values which are given within the scope of the present invention are included in these ranges.

In what follows or what precedes the expression "at least one" is equivalent to the expression "one or more". Persulfates The bleaching composition according to the invention comprises at least one persulfate as a peroxygenated salt. Preferably, the persulfate (s) are chosen from persulfates of sodium, potassium and ammonium, and mixtures thereof.

The concentration of persulfates in the composition according to the invention is generally between 10 and 80% by weight, preferably between 20 and 70% by weight and better still between 40 and 65% by weight of the total weight of the composition.

Cationic surfactant The composition according to the invention comprises one or more cationic surfactants chosen from tertiary fatty amines, optionally polyoxyalkylenated or their salts, quaternary ammonium salts, and their mixtures. According to the invention, cationic surfactants are non-polymeric, ie are not obtained by polymerization of monomers other than alkylene oxides or by grafting cationic groups on existing natural pigments. As tertiary fatty amines, mention may in particular be made of alkyl amido amines such as, for example, (C 8 -C 30) alkylamido (C 1 -C 6) alkylamines and in particular stearamidopropyl dimethylamine (such as the compound marketed under the US Pat. reference MACKINE 301 by the company MAC INTYRE).

As quaternary ammonium salts, there may be mentioned, for example: a) those corresponding to the following general formula (I): ## STR2 ## wherein R 1 R8 to R11, which may be the same or different, each represents an aliphatic group, linear or branched, having from 1 to 30 carbon atoms, or an aromatic group such as aryl or alkylaryl, at least one of the groups R8 to R11 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, for example the aliphatic groups chosen from C 1 -C 30 alkoxy, C 2 -C 6 polyoxyalkylene, C 1 -C 30 alkylamide, C 12 -C 22 alkylamido (C 2 -C 6) alkyl, C 12 -C 22 alkyl acetate, and C 1 -C 30 hydroxyalkyl groups; X- is an anionic counterion selected from halides, phosphates, acetates, lactates, alkyl (C1-C4) sulfates, (C1-C4) alkyl or (C1-C4) alkylsulphonates. Among the quaternary ammonium salts of formula (I), tetraalkylammonium halides such as tetraalkylammonium chlorides, for example tetraalkylammonium halides or alkyltrimethylammonium halides, such as dialkyldimethylammonium chlorides, are preferred on the one hand. or alkyltrimethylammonium in which the alkyl group comprises about 12 to 22 carbon atoms, in particular the halides, in particular behenyltrimethylammonium, distearyl-dimethyl-ammonium, cetyltrimethylammonium, benzyldimethylstearylammonium chlorides or, on the other hand, palmitylamidopropyltrimethylammonium, and mixtures thereof; b) the quaternary ammonium salts of imidazoline, for example those of the following formula (II): embedded image in which alkenyl or alkyl group having 8 to 30 carbon atoms, for example fatty acid derivatives of tallow, - R13 represents a hydrogen atom, a C1-C4 alkyl group or an alkenyl or alkyl group containing from 8 to 30 atoms R 14 represents a C 1 -C 4 alkyl group; R 15 represents a hydrogen atom or a C 1 -C 4 alkyl group; X 1 represents an anionic counterion, in particular chosen from halides, phosphates and acetates; , lactates, (C1-C4) alkyl sulfates, (C1-C4) alkyl or (C1-C4) alkylsulfonates. Preferably, R12 and R13 denote a mixture of alkenyl or alkyl groups having from 12 to 21 carbon atoms, for example fatty acid derivatives of tallow, R14 denotes a methyl group, R15 denotes a hydrogen atom. Such a product is for example marketed under the name REWOQUAT® W 75 by the company REWO; c) the quaternary di- or triammonium salts, in particular of the following formula (III): R17 R19 R16-N- (CH2) N-R21 R18 R20 Formula (III) in which: R16 denotes an alkyl group having about 16 to 30 carbon atoms, optionally hydroxylated and / or interrupted by one or more oxygen atoms; 2+ 2X- - R17 is selected from hydrogen, an alkyl group having 1 to 4 carbon atoms or a group - (CH2) 3-N + (R16a) (R17a) (R1sa); R16a, R17a, R18a, R18, R19, R20 and R21, which are identical or different, are chosen from hydrogen and an alkyl group comprising from 1 to 4 carbon atoms, and X> represents an anionic counterion particularly chosen from halides, acetates, phosphates, nitrates, (C 1 -C 4) alkyl sulphates, alkyl (C 1 -C 4) - or (C 1 -C 4) alkylarylsulfonates, in particular methylsulphate and ethylsulphate. Such compounds are, for example, Finquat CT-P proposed by Finetex (Quaternium 89), Finquat CT proposed by Finetex (Quaternium 75); d) the quaternary ammonium salts containing one or more ester functions, such as those of the following formula (IV): X / (CsH2s) z R25 0 CrHr2 (OH) r1N ++ CtHt2 (OH) t, 0 ± Wherein R 22 is selected from C 1 -C 6 alkyl groups and C 1 -C 6 hydroxyalkyl or dihydroxyalkyl groups, R 23 is selected from: ## STR2 ## R26 C - - linear or branched, saturated or unsaturated, linear or branched C1-C22 alkyl groups, - hydrogen atom, R25 is selected from: II - R2s group C. - R29 hydrocarbon groups C6, linear or branched, saturated or unsaturated, - the hydrogen atom, R24, R26 and R28, identical or different, are selected from linear or branched, saturated or unsaturated C7-C21 hydrocarbon groups; r, s and t, which are identical or different, are integers from 2 to 6, where r1 and t1 are identical or different and are 0 or 1 with r2 + r1 = 2r and t1 + t2 = 2t 5 ^ y is an integer ranging from 1 to 10, ^ x and z, which may be identical or different, are integers ranging from 0 to 10, where X represents anionic, organic or inorganic counterion, provided that the sum x + y + z is equal to 1 at 15, that when x is 0 then R23 is R27 and when z is 0 then R25 is R29. The alkyl groups R22 may be linear or branched, and more particularly linear. Preferably, R 22 denotes a methyl, ethyl, hydroxyethyl or dihydroxypropyl group, and more particularly a methyl or ethyl group. Advantageously, the sum x + y + z is from 1 to 10. When R 23 is a hydrocarbon R 27 group, it may be long and have 12 to 22 carbon atoms, or short and have 1 to 3 carbon atoms. When R 25 is a hydrocarbon R 29 group, it preferably has 1 to 3 carbon atoms. Advantageously, R24, R26 and R28, which are identical or different, are chosen from linear or branched, saturated or unsaturated Cil-021 hydrocarbon groups, and more particularly from linear or branched Cil-021 alkyl and alkenyl groups, saturated or unsaturated. Preferably, x and z, identical or different, are 0 or 1. Advantageously, y is equal to 1. Preferably, r, s and t, which are identical or different, are equal to 2 or 3, and even more particularly are equal to 2. The anionic counterion X- is preferably a halide, preferably chloride, bromide or iodide, a (C1-C4) alkyl sulphate, (C1-C4) alkyl or (C1-C4) alkyl aryl sulphonate. However, it is possible to use methanesulfonate, phosphate, nitrate, tosylate, an anion derived from an organic acid such as acetate or lactate or any other anion compatible with ammonium with an ester function. The anionic counterion X- is even more particularly chloride, methylsulfate or ethylsulfate.

In the composition according to the invention, the ammonium salts of formula (IV) are used more particularly in which: R 22 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: 0 - the group R26 g 10 - the methyl, ethyl or hydrocarbon groups in 014-022, - the hydrogen atom, - R25 is chosen from: the group R2c - the nyarogene atom, - R24, R26 and R28, which are identical or different, are chosen from linear or branched, saturated or unsaturated C13-C17 hydrocarbon groups, and preferably from linear or branched, saturated or unsaturated C13-C17 alkyl and alkenyl groups. Advantageously, the hydrocarbon radicals are linear. For example, among the quaternary ammonium salts containing one or more ester functional groups of formula (IV), the salts, in particular diacyloxyethyldimethylammonium, diacyloxyethylhydroxyethylmethylammonium chloride, monoacyloxyethyldihydroxyethylmethylammonium chloride, triacyloxyethylmethylammonium chloride, monoacyloxyethylhydroxyethyldimethylammonium chloride, or , and their mixtures. The acyl groups preferably have 14 to 18 carbon atoms and are more particularly derived from a vegetable oil such as palm or sunflower oil. When the compound contains more than one acyl group, the latter groups may be identical or different. These products are obtained, for example, by direct esterification of triethanolamine, triisopropanolamine, alkyldiethanolamine or alkyldiisopropanolamine optionally oxyalkylenated on fatty acids or mixtures of fatty acids of plant or animal origin, or by transesterification. of their methyl esters. This esterification is followed by quaternization using an alkylating agent such as an alkyl halide, preferably methyl or ethyl, a dialkyl sulphate, preferably methyl or ethyl sulphate. methyl methanesulfonate, methyl para-toluenesulfonate, glycol or glycerol chlorohydrin. Such compounds are, for example, sold under the names DEHYQUART® by the company COGNIS, STEPANQUAT® by the company STEPAN, NOXAMIUM® by the company CECA, REWOQUAT® VVE 18 by the company REWO-WITCO. 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 US-A-4874554 and US-A-4137180. Behenoylhydroxypropyltrimethylammonium chloride proposed by KAO can be used under the name Quatarmin BTC 131. Preferably, the ammonium salts containing at least one ester function contain two ester functions. Among the cationic surfactants which may be present in the composition according to the invention, it is more particularly preferred to choose the cetyltrimethylammonium, behenyltrimethylammonium, dipalmitoylethyl-hydroxyethylmethylammonium salts, and mixtures thereof, and more particularly behenyltrimethylammonium chloride, chloride cetyltrimethylammonium, dipalmitoylethylhydroxyethylammonium methosulfate, and mixtures thereof. According to the present invention, the cationic surfactant (s) chosen from tertiary fatty amines, optionally polyoxyalkylenated or their salts, the quaternary ammonium salts are preferably present in the composition in an amount ranging from 0.01 to 30. % by weight, preferably from 0.05 to 20% by weight, better still from 0.1 to 10% by weight relative to the total weight of the composition.

Preferably, the cationic surfactant (s) of the invention are chosen from quaternary ammonium salts. Alkaline Agent The bleaching composition according to the invention may comprise at least one alkaline agent. The alkaline agent (s) may for example be chosen from ammonium dihydrogen phosphate or tribasic ammonium phosphate, water-soluble silicates such as alkali metal or alkaline-earth metal silicates such as sodium disilicate, sodium metasilicate, di-phosphates and the like. basic or tribasic alkali or alkaline earth metals or alkali or alkaline earth metal carbonates, such as lithium, sodium, potassium, magnesium, calcium, barium, and mixtures thereof. Preferably, the alkaline agent (s) are chosen from water-soluble silicates such as alkali metal or alkaline-earth metal silicates, basic or tribasic alkali metal or alkaline earth metal phosphates, alkali or alkaline-earth metal carbonates, and their mixtures. In the context of the invention, the term "water-soluble silicate" means a silicate which has a solubility in water at 25 ° C. of greater than 0.5%, preferably greater than 1% by weight. These water-soluble silicates differ from aluminum silicates and their derivatives, especially clays, such as mixed silicates of natural or synthetic origin which are insoluble in water.

When present in the composition according to the invention, the concentration of alkaline agents generally varies from 0.1 to 40% by weight, preferably from 0.5 to 30% by weight, and better still from 1 to 25% by weight. by weight of the total weight of the composition.

Rheology modifying agents According to one embodiment, the bleaching composition according to the invention advantageously comprises at least one rheology modifier selected from hydrophilic thickeners, amphiphilic polymers comprising at least one hydrophobic chain, fillers and mixtures thereof. The rheology modifying agents may be present in a content ranging from 0.01% to 30% by weight relative to the total weight of the composition, preferably from 0.1% to 10% by weight. As examples of hydrophilic thickeners, that is to say not comprising a C6-C30 hydrocarbon fatty chain, which can be used according to the invention, mention may be made in particular of: - thickening polymers of natural origin, such as a) extracts algae, such as alginates (such as alginic acid and sodium alginates), carrageenans, agar agars, and mixtures thereof. As examples of carrageenans, mention may be made of Satiagum UTC30® and UTC10® from Degussa; as alginates, mention may be made of sodium alginate sold under the name Kelcosol® by the company ISP; (b) gums, such as xanthan gum, guar gum and their nonionic derivatives (hydroxypropyl guar), gum arabic, konjac gum or mannan, tragacanth gum, ghatti gum, karaya gum, carob gum; agar gum, scleroglucan gums and mixtures thereof; (c) starches, preferably modified starches, such as those derived, for example, from cereals such as wheat, maize or rice, from vegetables such as sweet peas, from tubers such as potatoes or cassava, starches from tapioca; carboxymethyl starch. By way of example of starches, mention may be made of "STARX 15003" corn starch marketed by Staley, the pre-gelatinized starch sold under the name "LYCATAB PGS" by Roquette; sodium carboxymethyl starch marketed under the reference "EXPLOTAB" by Roquette; (d) dextrins, such as dextrin extracted from corn; e) celluloses such as microcrystalline cellulose, amorphous cellulose, and cellulose derivatives, in particular hydroxyalkyl (C 1 -C 6) celluloses and carboxyalkyl (C 1 -C 6) celluloses, in particular crosslinked, mention may be made especially of methylcelluloses, hydroxyalkylcelluloses, ethylhydroxyethylcelluloses, carboxymethylcelluloses. As examples, mention may be made of the microcrystalline cellulose sold under the name "AVICEL PH 100 or pH102" by the company FMC Biopolymers; f) pectins, g) chitosan and its derivatives, h) anionic polysaccharides other than starch and cellulose derivatives, in particular of biotechnological origin, such as the anionic polysaccharide having as a repeating unit a tetrasaccharide composed of L-fucose, D-glucose and glucuronic acid, such as that bearing the INCI name Biosaccharide Gum-4 sold under the reference GLYCOFI LM 1.5P by the company Solabia, i) soy polysaccharides, and mixtures thereof. synthetic polymers such as crosslinked or non-crosslinked polyvinylpyrrolidone, such as, for example, crosslinked polyvinylpyrrolidone, for example the "KollindonCl" marketed by BASF, acrylic acid polymers and their salts, such as crosslinked polyacrylates, such as the one sold on the market; by the company Rohm and Haas under the reference "ACUSOL 772", polyacrylamides, polymers (in particular homopolymers) of cross-linked or non-crosslinked poly-2-acrylamidopropanesulphonic acids such as non-cross-linked poly-2-acrylamidopropanesulphonic acid (Simugel ® EG from Seppic), cross-linked poly-2-acrylamido-2-methylpropane sulfonic acid, free or partially neutralized with ammonia (Hostacerin® AMPS from Clariant), poly-2- acid mixtures acrylamido-2-methylpropanesulphonic acid uncrosslinked with hydroxyalkylcellulose ethers or with poly (ethylene oxide) as they are described in US Pat. No. 4,540,510; mixtures of poly (meth) acrylamidoalkyl (C1-C4) -sulfonic acid, preferably crosslinked, with a crosslinked copolymer of maleic anhydride and of a (C1-C5) alkyl vinyl ether (Stabileze QM from ISF) , and their mixtures.

The amount of hydrophilic thickening agents present in the composition according to the invention may be between 0.01 and 30% and preferably between 0.1 and 15% by weight and better still between 0.1 and 10% by weight relative to to the total weight of the composition.

The composition according to the invention may comprise at least one amphiphilic polymer comprising at least one hydrophobic chain. More specifically, these amphiphilic polymers, if present, are of the nonionic, anionic, cationic or amphoteric type. They are preferably of nonionic, anionic or cationic nature.

Said amphiphilic polymers comprise, more particularly, as a hydrophobic chain, a hydrocarbon chain, saturated or unsaturated, aromatic or non-aromatic, linear or branched, C 6 -C 30, contiguous to optionally one or more oxyalkylenated units (oxyethylenated and / or oxypropylenated ). Among the cationic amphiphilic polymers comprising a hydrophobic chain, cationic polyurethanes or cationic copolymers comprising vinyllactam units and in particular vinylpyrrolidone units may be found. Even more preferably, the amphiphilic polymers comprising a hydrophobic chain are of nonionic or anionic nature. Examples of hydrophobic chain nonionic amphiphilic polymers include, among others, celluloses comprising a hydrophobic chain (Natrosol Plus Grade 330 CS® from Aqualon, Bermocoll EHM 100® from Berol Nobel, Amercell Polymer HM -1500® from Amerchol); hydroxypropyl guars modified with one or more hydrophobic groups (Jaguar XC-95 / 3®, RE210-18, RE205-1, from Rhodia Chimie, Esaflor HM 22® from Lamberti); copolymers of vinylpyrrolidone and of hydrophobic chain monomers (certain products of the Antaron®, Ganex® ranges of the company I.S.P); copolymers of C1-C6 alkyl (meth) acrylates and of amphiphilic monomers comprising a hydrophobic chain; copolymers of hydrophilic (meth) acrylates and of monomers comprising at least one hydrophobic chain (polyethylene glycol methacrylate / lauryl methacrylate copolymer); polymers with an aminoplast ether skeleton having at least one fatty chain (Pure Thix® from Süd-Chemie); polyether polyurethanes, linear (block structure), grafted or star-shaped, comprising in their chain, at least one hydrophilic block and at least one hydrophobic block (as described in the article by G. Fonnum, J. Bakke and Fk Hansen-Colloid Polym Sci 271, 380.389 (1993), in particular the polyether polyurethane obtainable by polycondensation of at least three compounds comprising (i) at least one polyethylene glycol comprising from 150 to 180 moles of diene oxide. ethylene, (ii) a polyoxyethylenated stearyl alcohol comprising 100 moles of ethylene oxide and (iii) a diisocyanate, such as sold in particular by the company ELEMENTIS under the name RHEOLATE FX 1100 ®, which is a polyethylene glycol polycondensate at 136. moles of ethylene oxide, stearyl alcohol polyoxyethylenated to 100 moles of ethylene oxide and hexamethylene diisocyanate (HDI) having a weight average molecular weight of 30000 (INCI name: PEG-136 / Ste areth-1001 / SMDI Copolymer), Mention may also be made of Rheolate 205, 208, 204 or 212 from Rheox; Elfacos ™ T210, T212 from the company Akzo).

As examples of anionic amphiphilic polymers comprising at least one hydrophobic chain that may be used in the context of the present invention, mention may be made of the polymers, crosslinked or otherwise, comprising at least one hydrophilic unit derived from one or more unsaturated monomers. ethylene group carrying a carboxylic acid function, free or partially or totally neutralized, and at least one hydrophobic unit derived from one or more ethylenically unsaturated monomers carrying a hydrophobic side chain, and optionally at least one crosslinking unit derived from one or more several polyunsaturated monomers. Mention may in particular be made of copolymers of (meth) acrylic acid and of C10-C30 alkyl (meth) acrylates, which are crosslinked or non-crosslinked, such as those described in US Pat. No. 3,915,921 and US Pat. No. 4,9999,49 or acid copolymers (meth) ) acrylic and allyl ethers of fatty alcohols such as those described in EP 216479. In addition, Carbopol products ETD-2020® and 13820, Pemulen TR1® and TR20 from the company Goodrich; methacrylic acid / ethyl acrylate / stearyl methacrylate oxyethylenated copolymer (55/35/10); (meth) acrylic acid / ethyl acrylate / behenyl methacrylate oxyethylenated EO copolymer; the crosslinked methacrylic acid / ethyl acrylate / steareth-10 allyl ether copolymer are suitable polymers for carrying out the invention.

If these amphiphilic polymers are present, their content represents from 0.01 to 30% by weight, preferably from 0.1 to 10% by weight relative to the weight of the composition.

By "fillers" is meant solid particles insoluble in the medium of the composition regardless of the temperature at which the composition is made. The fillers may be colorless or white, mineral or organic, of any physical form (platelet, spherical or oblong), and of any crystallographic form (e.g., sheets, cubic, hexagonal, orthorhombic, etc.). The fillers may be porous or non-porous. As fillers, mention may be made of mineral fillers such as hydrophobic or hydrophilic silicas, clays other than those mentioned above, ceramic beads, calcium carbonate, titanium oxides, magnesium oxides, silicates and the like. aluminum and their derivatives, especially clays, such as mixed silicates of natural or synthetic origin, in particular aluminum and magnesium silicates, in particular hydrated silicates, hydrated natural aluminum silicates, such as bentonite or kaolin, talc, organic fillers such as nylon, microspheres based on vinylidene chloride / acrylonitrile / methacrylonitrile copolymer enclosing isobutane, expanded such as those sold under the name Expancel 551 DE® by the company Expancel, vegetable powders micronized (like the fruit powders of the company LESSONIA) or not micronized, or the powder of shells of grains of rice, and their mixtures. Mention may also be made of silicas, in particular pyrogenic silicas of hydrophilic nature (in particular Aerosil® 90, 130, 150, 200, 300 and 380, from Degussa Hüls). Some of the rheology modifiers mentioned may also have a role in assisting the disintegration of the bleaching composition in compressed form during its use. Thus, in a particular embodiment, the composition according to the invention comprises at least one disintegrant chosen from celluloses, in particular microcrystalline cellulose, and cellulose derivatives, crosslinked polyacrylates, crosslinked polyvinylpyrrolidone, and soy polysaccharides. alginates, aluminum silicates and their derivatives, silicas, in particular hydrophilic silicas and mixtures thereof.

Additional surfactants The composition according to the invention may advantageously comprise, in addition to the cationic surfactant chosen from tertiary fatty amines, optionally polyoxyalkylenated or their salts, quaternary ammonium salts, and mixtures thereof, at least one additional said surfactant. The additional surfactant or surfactants can be indifferently chosen, alone or in mixtures, from anionic, amphoteric, nonionic, zwitterionic and cationic surfactants other than the cationic surfactants described above, in particular from anionic and / or nonionic surfactants.

Additional surfactants suitable for carrying out the present invention include the following. Among the nonionic surfactants, mention may be made of alcohols, alpha-diols and alkylphenols, each of these compounds being polyethoxylated and / or polypropoxylated, and having at least one hydrocarbon-based chain comprising, for example, from 8 to 30 carbon atoms, preferably from 8 to 18 carbon atoms, the number of ethylene oxide groups and / or propylene oxide groups ranging from 2 to 200.

Mention may also be made of copolymers of ethylene oxide and of propylene oxide, condensates of ethylene oxide and / or propylene oxide on fatty alcohols; polyethoxylated fatty amides preferably having from 2 to 30 moles of ethylene oxide; oxyethylenated sorbitan fatty acid esters having from 2 to 30 moles of ethylene oxide; sucrose fatty acid esters, polyethylene glycol fatty acid esters, alkyl polyglycosides, N-alkyl glucamine derivatives, and the like. The term "anionic surfactant" is understood to mean a surfactant comprising as ionic or ionizable groups only anionic groups.

These anionic groups are preferably chosen from the groups CO2H, 002-, SO3H, SO3-, OSO3H, OSO3-, O2PO2H, O2PO2H-, O2PO2-. The anionic surfactant (s) that may be used in the compositions of the invention are especially chosen from alkyl sulphates, alkyl ether sulphates, alkyl amido ether sulphates, alkylaryl polyether sulphates, monoglyceride sulphates, alkyl sulphonates, alkyl amide sulphonates, alkyl aryl sulphonates, alpha-olefin-sulfonates, paraffinsulfonates, alkylsulfosuccinates, alkylethersulfosuccinates, alkylamidesulfosuccinates, alkylsulphoacetates, acylsarcosinates, acylglutamates, alkylsulfosuccinamates, acylisethionates and N-acyltaurates, monoesters salts of alkyl and polyglycoside-polycarboxylic acids, acyllactylates, D-galactoside-uronic acid salts, alkyl ether-carboxylic acid salts, alkyl aryl ether-carboxylic acid salts, alkyl amidoether carboxylic acid salts. ; or the non-salt forms of all these compounds, the alkyl and acyl groups of all these compounds having 6 to 24 carbon atoms and the aryl group denoting a phenyl group and mixtures thereof. Some of these compounds can be oxyethylenated and then preferably comprise from 1 to 50 ethylene oxide units. The salts of C6-24 alkyl monoesters and of polyglycosidepolycarboxylic acids may be chosen from C6-24 alkyl polyglycoside citrates, C6-24 alkyl polyglycoside tartrates and alkyl polyglycoside sulphosuccinates. C6-C24.

When the agent or the anionic surfactants are in the salt form, they may be chosen from alkali metal salts such as the sodium or potassium salt and preferably sodium salt, ammonium salts, amine and especially aminoalcohol salts, and alkaline earth metal salts such as magnesium salt.

By way of example of aminoalcohol salts, mention may be made in particular of the salts of mono-, di- and triethanolamine, the salts of mono-, di- or tri-isopropanolamine, the salts of 2-amino-2-methyl 1-propanol, 2-amino-2-methyl-1,3-propanediol and tris (hydroxymethyl) amino methane. The alkali metal or alkaline earth metal salts and in particular the sodium or magnesium salts are preferably used.

Alkyl (C6-24) sulphates, alkyl (C6-24) ether sulphates, optionally oxyethylenated, comprising from 2 to 50 ethylene oxide units, and mixtures thereof, in particular in the form of alkali metal or alkaline salts, are preferably used. -terrous, ammonium, aminoalcohol. More preferably, the anionic surfactant (s) are chosen from (C 10-20) alkyl sulphates in the form of alkali metal or alkaline earth metal salts, and in particular sodium lauryl sulphate and sodium cetostearyl sulphate, and mixtures thereof. The amphoteric or zwitterionic surfactant (s) that may be used in the present invention may be in particular derivatives of secondary or tertiary aliphatic amines, optionally quaternized, in which the aliphatic group is a linear or branched chain containing 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. Mention may in particular be made of (C 8 -C 20) alkyl betaines, sulphobetaines, (C 8 -C 20) alkylamido (C 3-8 alkyl) betaines or (C 8 -C 20) alkylamido (C 6 -C 8 alkyl) ) sulfobetaines. Among the derivatives of secondary or tertiary aliphatic amines, optionally quaternized, which may be used, as defined above, there may also be mentioned the compounds of the following respective structures (B1) and (B2): Ra-C (O) -NH-CH2 -CH2-N + (Rb) (Rc) -CH2C (O) O-, M +, X- (B1) Formula wherein: Ra represents a C1-C30 alkyl or alkenyl group derived from an acid RaCOOH, preferably present in hydrolyzed coconut oil, a heptyl, nonyl or undecyl group; Rb represents a beta-hydroxyethyl group; and Rc is carboxymethyl; M + represents a cationic counterion derived from an alkali metal, alkaline earth metal, such as sodium, an ammonium ion or an ion derived from an organic amine, and X - represents an organic or inorganic anionic counterion, such as that selected from halides, acetates, phosphates, nitrates, (C 1 -C 4) alkyl sulphates, (C 1 -C 4) alkyl or (C 1 -C 4) alkylarylsulfonates, in particular methylsulphate and ethylsulphate; or else M + and X- are absent; Ra'-C (O) -NH-CH 2 -CH 2 -N (B) (B ') (B2) Formula wherein: B is -CH 2 -CH 2 -O-X'; B 'represents the group - (CH2) zY', with z = 1 or 2; X 'represents the group -CH2-C (O) OH, -CH2-C (O) OZ', -CH2-CH2-C (O) OH, -CH2-CH2-C (O) OZ ', or hydrogen atom; Y 'represents the group -C (O) OH, -C (O) OZ', -CH2-CH (OH) -SO3H or the group -CH2-CH (OH) -SO3-Z '; Z 'represents a cationic counterion derived from an alkaline or alkaline earth metal, such as sodium, an ammonium ion or an ion derived from an organic amine; Ra 'represents a C10-C30 alkyl or alkenyl group of an acid Ra'-C (O) OH preferably present in coconut oil or in hydrolyzed linseed oil, an alkyl group, especially C17 and its iso form, an unsaturated C17 group. These compounds are classified in the CTFA dictionary, 5th edition, 1993, under the names cocoamphodiacétate disodium, lauroamphodiacétate disodium, caprylamphodiacétate disodium, capryloamphodiacétate disodium, cocoamphodipropionate disodium, lauroamphodipropionate disodium, caprylamphodipropionate disodium, capryloamphodipropionate disodium, acid lauroamphodipropionic, cocoamphodipropionic acid. By way of example, mention may be made of cocoamphodiacetate marketed by Rhodia under the trade name MIRANOL® C2M concentrate. It is also possible to use compounds of formula (B'2); Ra "-NH-CH (Y") - (CH2) nC (O) -NH- (CH2) n -N (Rd) (Re) (B'2) Formula wherein: Y Y represents the group - C (O) OH, -C (O) OZ-, -CH2-CH (OH) -SO3H or the group -CH2-CH (OH) -SO3-Z-; Rd and Re, independently one of the further represent a C 1 -C 4 alkyl or hydroxyalkyl radical; represents a cationic counterion derived from an alkali metal or alkaline earth metal, such as sodium, an ammonium ion or an ion derived from an organic amine; "Ra" represents a C10-C30 alkyl or alkenyl group of an acid Ra "-C (O) OH preferably present in coconut oil or in hydrolysed linseed oil. n and n ', independently of one another, denotes an integer ranging from 1 to 3. Among the compounds of formula (B'2), mention may be made of the compound classified in the CTFA dictionary under the name sodium diethylaminopropyl cocoaspartamide and marketed by CHIMEX under the name CHIMEXANE HB. Among the amphoteric or zwitterionic surfactants mentioned above, use is preferably made of alkyl (C 8 -C 20) betaines such as cocobetaine, (C 8 -C 20) alkylamido (C 3 -C 8) alkylbetaines such as cocamidopropylbetaine, and their mixtures, the compounds of formula (B'2) such as the sodium salt of diethylaminopropyl lauryl amino succinamate (INCI name: sodium diethylaminopropyl cocoaspartam ide). More preferably, the amphoteric or zwitterionic surfactant (s) is (are) chosen from cocamidopropylbetaine and cocobetaine, the sodium salt of diethylaminopropyl laurylamino succinamate, or mixtures thereof. The amounts of additional surfactants present in the composition according to the invention may vary from 0.01 to 30% and preferably from 0.1 to 20% by weight and better still from 0.5 to 10% by weight of the total weight. of the composition. Organic Inert Phase The composition according to the invention may comprise at least one organic inert phase. By "inert" is meant not entailing a rapid destruction of persulfates, that is to say not causing a decrease in the persulfate level of more than 50% in 24 hours at room temperature. Preferably the organic inert phase is a fatty phase consisting of one or more fatty substances.

By "fatty substance" is meant an organic compound which is insoluble in water at ordinary temperature (25 ° C.) and at atmospheric pressure (760 mmHg) (solubility of less than 5% and preferably of 1%, even more preferentially at 0.1%). The fatty substances have in their structure at least one hydrocarbon chain containing at least 6 carbon atoms or a chain of at least two siloxane groups. In addition, the fatty substances are generally soluble in organic solvents under the same conditions of temperature and pressure, such as, for example, chloroform, dichloromethane, carbon tetrachloride, ethanol, benzene, toluene, tetrahydrofuran ( THF), petrolatum oil or decamethylcyclopentasiloxane.

The fatty substances of the invention do not contain a salified carboxylic acid group (s). In particular, the fatty substances of the invention are also not (poly) oxyalkylenated nor (poly) glycerolated ethers.

Preferably, the composition comprises a liquid organic inert phase (or liquid fatty phase), comprising oils as fatty substance. By liquid phase is meant in the sense of the present invention any phase capable of flow at ambient temperature, generally between 15 ° C and 40 ° C, and at atmospheric pressure, under the action of its own weight.

By "oil" is meant a "fat" which is liquid at room temperature (25 ° C), and at atmospheric pressure (760 mm Hg). The organic inert liquid phase may in particular be chosen from polydecenes of formula C10n1-1 [(20n) +2] in which n varies from 3 to 9 and preferably from 3 to 7, liquid fatty alcohols, alcohol esters and fatty acids or fatty acids, esters or diesters of 0-12-024 fatty acid sugars, cyclic ethers or cyclic esters, silicone oils, mineral oils or vegetable oils, or mixtures thereof. The compounds of formula Cion H [(20n) + 2] with n varying from 3 to 9 correspond to the name "polydecene" of the CTFA Dictionary 7th edition 1997 of the Cosmetic, Toiletry and Fragrance Association, USA, as well as to the same appellation INCI in the USA and Europe. They are hydrogenation products of poly-1-decenes. Among these compounds, it is preferred according to the invention for which, in the formula, n varies from 3 to 7. Mention may be made, by way of example, of the product sold under the name Silkflo® 366 NF Polydecene by the company Amoco Chemical, those sold under the name Nexbase® 2002 FG, 2004 FG, 2006 FG and 2008 FG by Fortum.

As regards esters of fatty alcohols or of fatty acids, mention may be made by way of example: esters of linear or branched C306 saturated lower monohydric alcohols with monofunctional C 12 -C 24 fatty acids, the latter which may be linear or branched, saturated or unsaturated and chosen in particular from oleates, laurates, palmitates, myristates, behenates, cocoates, stearates, linoleates, linolenates, caprates, arachidonates, or mixtures thereof such as in particular oleo-palmitates, oleostearates, palmitostearates. Among these esters, it is more particularly preferred to use isopropyl palmitate, isopropyl myristate and octyl dodecyl stearate. esters of C 3 -C 8 linear or branched monohydric alcohols with bifunctional C 8 -C 24 fatty acids, the latter possibly being linear or branched, saturated or unsaturated, such as, for example, the isopropyl di-ester of sebacic acid, called also di-isopropyl sebacate, esters of linear or branched C 3 -C 8 monohydric alcohols, with bifunctional C 2 -C 8 fatty acids, the latter possibly being linear or branched, saturated or unsaturated, such as, for example, di-adipate; octyl and di-caprylyl maleate; the ester of a trifunctional acid such as triethyl citrate. With regard to esters and diesters of C 12 -C 24 fatty acid sugars, the term "sugar" means compounds which have several alcohol functional groups, with or without an aldehyde or ketone function, and which comprise at least 4 atoms. of carbon. These sugars can be monosaccharides, oligosaccharides or polysaccharides. As sugars that can be used according to the invention, mention may be made, for example, of sucrose (or sucrose), glucose, galactose, ribose, fuctose, maltose, fructose, mannose, arabinose, xylose, lactose , and their especially alkylated derivatives, such as methylated derivatives such as methylglucose.

The esters of sugars and fatty acids that can be used according to the invention can be chosen especially from the group comprising the esters or mixtures of sugar esters described above and linear or branched, saturated C12-O24 fatty acids. or unsaturated.

The esters may be chosen from mono-, di-, tri- and tetraesters, polyesters and mixtures thereof. These esters may be, for example, chosen from oleates, laurates, palmitates, myristates, behenates, cocoates, stearates, linoleates, linolenates, caprates, arachidonates, or mixtures thereof, such as in particular mixed oleo-palmitate, oleostearate and palmito-stearate esters. . More particularly, it is preferred to use the mono- and diesters and especially mono- or dioleates, stearates, behenates, oleopalmitates, linoleates, linolenates, oleostearates, sucrose, glucose or methylglucose.

By way of example, mention may be made of the product sold under the name Glucate® DO by the company Amerchol, which is a methylglucose dioleate. Mention may also be made, by way of examples, of esters or mixtures of esters of fatty acid sugar: the products sold under the names F160, F140, F110, F90, F70 and SL40 by the company Crodesta, respectively denoting sucrose palmitostearate of 73% monoester and 27% di- and tri-ester, 61% monoester and 39% di-, tri-, and tetraester, 52% monoester and 48% monoester; % di-, tri- and tetraester, 45% monoester and 55% di-, tri- and tetraester, 39% monoester and 61% di-, tri-, and tetra. ester, and sucrose mono-laurate; the products sold under the name Ryoto Sugar Esters, for example referenced B370 and corresponding to sucrose behenate formed from 20% monoester and 80% di-triester-polyester; the sucrose mono-dipalmito-stearate marketed by Goldschmidt under the name Tegosoft® PSE. As regards the cyclic ethers and cyclic esters, γ-butyrolactone, dimethyl isosorbide or diisopropyl isosorbide are particularly suitable. Silicone oils can also be used as an inert organic liquid phase. More particularly, the suitable silicone oils are liquid and non-volatile silicone fluids with a viscosity of less than or equal to 10,000 mPa.s at 25 ° C., the viscosity of the silicones being measured according to ASTM Standard 445 Appendix C.

Silicone oils are further defined in Walter Noll's "Chemistry and Technology of Silicones" (1968) - Academic Press. Among the silicone oils that may be used according to the invention, mention may be made in particular of the silicone oils sold under the names DC-200 fluid-5 mPas, DC-200 fluid-20 mPas, DC-200 fluid-350 mPa. .s, DC-200 fluid-1000 mPa.s, DC-200 fluid-10,000 mPa.s by the company Dow Corning. The mineral oils can also be used as organic inert liquid phase, for example paraffin oil. Vegetable oils may also be suitable, including avocado oil, olive oil or liquid jojoba wax. Preferably, the organic inert liquid phase is chosen from the group formed by the polydecenes of formula Ci on1-1 [(20n) +2] in which n varies from 3 to 9 and preferably from 3 to 7, the esters of fatty alcohols or fatty acids, and mixtures thereof.

According to a particular embodiment of the invention, the content of organic inert phase, preferably liquid, varies from 0.1 to 30% by weight, preferably from 0.5 to 20% by weight relative to the weight of the composition, and even more preferably from 1 to 10% by weight.

According to one embodiment, the composition in compressed form according to the invention comprises at least one hydrogen peroxide generating agent. As a hydrogen peroxide generating agent useful in the present invention, mention may be made of polymeric complexes that can release hydrogen peroxide, such as polyvinylpyrrolidone / H 2 O 2, in particular being in the form of powders and the other polymer complexes described. in US 5,008,093; US 3,376,110; US 5,183,901. Mention may also be made of urea peroxide, perborates and percarbonates of alkali or alkaline earth metals or of ammonium. Alkaline or alkaline earth metal percarbonates, in particular sodium perabonate, are preferably used. It may be noted that the persulfates of alkali or alkaline earth metals or of ammonium are not included in these precursors because in the redox mechanisms employing these persulfates there is no release of hydrogen peroxide.

In this embodiment, the hydrogen peroxide-generating agent (s) may represent from 0.1 to 40% by weight relative to the total weight of the composition, preferably from 0.5 to 20% by weight and better still from 1 to 10% by weight.

The bleaching composition according to the invention is in compressed form is preferably anhydrous. In the context of the present invention, a composition is anhydrous when it has a water content of less than 1% by weight, and preferably less than 0.5% by weight relative to the total weight of the composition. Preferably the composition according to the invention is free of water. The composition according to the present invention may also comprise various additives conventionally used in cosmetics.

The composition according to the present invention may thus comprise lubricants such as polyol stearates or stearates of alkali or alkaline earth metals, pigments, dyes, additives such as urea, ammonium chloride, antioxidants, penetrating agents, sequestering agents such as EDTA or EDDS, buffers, dispersing agents, film-forming agents, preserving agents, opacifying agents, vitamins, perfumes, anionic polymers, not ionic, amphoteric or zwitterionic other than the rheology modifying agents already mentioned, conditioning agents such as for example cationic polymers, ceramides, amino silicones.

Of course, one skilled in the art will take care to choose this or these optional additional compounds in such a way that the advantageous properties intrinsically attached to the composition according to the invention are not, or not substantially, impaired by the addition or additions considered.

The composition in compressed form can be obtained according to methods of compression, compaction (or pelleting) known as for example direct compression. The composition may in particular be provided in the form of a powder which is compacted, for example in a pelletizer, by application of a compressive force. The value of the compressive force can range, for example, from 0.1 to 500 MPa, in particular from 0.2 to 100 MPa. The composition in compressed form according to the invention may be single-layer or mutilayer. According to one embodiment, it may comprise at least one layer comprising the bleaching composition comprising at least one persulfate and at least one so-called additional layer which may comprise, for example, bursting agents intended to accelerate the disintegration of the tablet, alkaline agents as mentioned above, cosmetic active agents and mixtures thereof. As bursting agents (or disintegration agents) mention may in particular be made of celluloses and cellulose derivatives, in particular hydroxyalkylcelluloses, microcrystalline celluloses, amphiphilic polyurethanes, crosslinked polyacrylates, crosslinked polyvinylpyrrolidone, gums such as gum guar, soy polysaccharides, alginates, aluminum silicates and their derivatives, silicas, in particular hydrophilic silicas and mixtures thereof According to one embodiment, the composition in compressed form comprises at least one layer comprising the bleaching composition. comprising at least one persulfate, at least one additional layer comprising at least one bursting agent intended to accelerate the disintegration of the tablet and at least one additional layer comprising at least one alkaline agent. According to one embodiment, the composition in compressed form comprising at least one persulfate comprises at least one inclusion, for example in the form of a ball, comprising a powder or a liquid encapsulated in a water-soluble film. The composition in compressed form according to the invention may be in unidose form ready for use. According to one embodiment, it can be divisible and comprise on at least one of its faces at least one breakpoint bar indicating a division of the tablet into two parts (for example two halves) or several parts, to allow a dosage the amount of bleaching composition to be used in the process.

The composition in compressed form according to the invention can be packaged in individual form or grouped in a hermetic bag, moisture-proof.

The present invention also relates to a process for bleaching keratinous fibers comprising applying to the keratin fibers a bleaching composition in compressed form comprising at least one persulfate and at least one cationic surfactant chosen from tertiary fatty amine salts, optionally polyoxyalkylenated, quaternary ammonium salts, and mixtures thereof, in the presence of an aqueous composition. The composition in compressed form is generally added to the aqueous composition just at the moment of use, that is to say just before application to the keratinous fibers. The step of dissolving the bleaching composition in compressed form can take from a few seconds to a few minutes, it can be done with or without agitation. The present invention also relates to a multi-compartment device comprising: at least one bleaching composition in compressed form comprising at least one persulfate and at least one cationic surfactant chosen from tertiary fatty amines, optionally polyoxyalkylenated or their salts, salts quaternary ammonium, and mixtures thereof, and at least one aqueous composition, said compositions being packaged separately. The appropriate medium of the aqueous composition is generally water or a mixture of water and at least one organic solvent to solubilize compounds that are not sufficiently soluble in water. As organic solvent, there may be mentioned for example lower alkanols in 0104, such as ethanol and isopropanol; polyols such as propylene glycol, glycerol, dipropylene glycol and polyol ethers such as 2-butoxyethanol, propylene glycol monomethyl ether, and aromatic alcohols such as benzyl alcohol or phenoxyethanol, the like and mixtures thereof. The solvents may be present in proportions preferably of between 1 and 40% by weight relative to the total weight of the aqueous composition, and more preferably between 5 and 30% by weight approximately. According to one embodiment, the aqueous composition comprises at least one oxidizing agent. The oxidizing agents that can be used in the aqueous composition are preferably chosen from hydrogen peroxide and compounds that release hydrogen peroxide by hydrolysis, such as urea peroxide. Hydrogen peroxide is preferably used. The oxidizing agent may represent from 0.5 to 70% by weight, preferably from 1 to 60% by weight, and better still from 5 to 20% of the total weight of the aqueous composition. The aqueous composition comprising at least one oxidizing agent preferably has a pH of less than 7.

The aqueous composition may be in any form suitable to allow good dilution of the composition in compressed form, preferably in liquid form. The composition may also contain various additives conventionally used in cosmetics such as those described above.

It may further include oxygen release control agents such as carbonate or magnesium oxide. The additives and oxygen release control agents as defined above may be present in an amount for each of them ranging from 0.01 to 40% by weight, preferably from 0.1 to 30% by weight relative to to the total weight of the aqueous composition. The invention will be more fully illustrated with the aid of the following nonlimiting examples. Unless otherwise indicated, the quantities indicated are expressed in grams.

EXAMPLE The following powder-form bleaching composition can be prepared: Potassium persulfate (United Initiators KPS) 48.4 Ammonium persulfate (United Initiators APS) 14.5 Sodium metasilicate (Woellner Simet AP) 14, 5 Ethylenediamine tetraacetic acid 1 Sodium lauryl sulphate (Texapon Z95P from Cognis) 1 Hydroxypropylated guar gum (Jaguar HP 105 from 2 Rhodia) Microcrystalline cellulose (Avicel PH 105 from FMC Corp) 14 Dipalmitoylethyl hydroxyethyl 4,6 methyl ammonium methosulfate mixture ( 30) / cetearyl alcohol (70) (DEHYQUART F 30 from Cognis) Tablets of 10 grams each can be prepared from the powder obtained using a SPECAC compacting machine.

The tablet composition thus obtained can be mixed with an aqueous 20, 30 or 40 volumes (oxidizing) aqueous hydrogen peroxide composition in a ratio of 1: 1.5 to 1/2, ie 4 tablets (40g) for 60 to 80g of oxidant.

Claims (15)

REVENDICATIONS1. A bleaching composition for keratinous fibers in the compressed form comprising at least one persulfate and at least one cationic surfactant chosen from tertiary amines, optionally polyoxyalkylenated, or their salts, quaternary ammonium salts, and mixtures thereof. 2. The composition of claim 1, wherein the persulfate (s) are selected from persulfates of sodium, potassium and ammonium, and mixtures thereof. 3. Composition according to claim 1 or 2, characterized in that the persulfate concentration is between 10 and 80% by weight, preferably between 20 and 70% by weight and better still between 40 and 65% by weight of the total weight of the composition. 4. Composition according to any one of the preceding claims, characterized in that the cationic surfactant (s) is (are) chosen from the following compounds: R8 to R11, which may be 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 R8 to R11 comprising from 8 to 30 carbon atoms, preferably 12 to 24 carbon atoms, the aliphatic groups may contain heteroatoms, the aliphatic groups being particularly selected from C1-C30 alkyl, C1-C30 alkoxy, polyoxyalkylene (C2-06) groups; C1-C30 alkylamide, (C1-C22) alkylamido (C2-C6) alkyl, (C1-C22) alkyl, and C1-C30 hydroxyalkyl, - X- is an anionic counterion; II) R13 X, \ N / NN 'R14 wherein: R12 represents an alken group alkyl or alkyl having from 8 to 30 carbon atoms, for example fatty acid derivatives of tallow; R13 represents a hydrogen atom, a C1-C4 alkyl group or an alkenyl or alkyl group containing from 8 to 30 carbon atoms; - R14 represents a C1-C4 alkyl group; - R15 represents a hydrogen atom, or a C1-C4 alkyl group; X represents anionic counterion; preferably, R12 and R13 denote a mixture of alkenyl or alkyl groups containing from 12 to 21 carbon atoms, for example fatty acid derivatives of tallow, R14 denotes a methyl group, R15 denotes a hydrogen atom; - c) of formula (III): R17 R19 R16-N- (C1-12) N-R21 R18 R20 wherein: - R16 denotes an alkyl group having from about 16 to 30 carbon atoms, optionally hydroxyl and / or interrupted by one or more oxygen atoms; X 2+ 2X-- R 17 is selected from hydrogen, an alkyl group having 1 to 4 carbon atoms or a group - (CH 2) 3 -N + (R 16a) (R 17a) (R 1sa); R16a, R17a, Riga, R18, R19, R20 and R21, which are identical or different, are chosen from hydrogen and an alkyl group comprising from 1 to 4 carbon atoms, and - X- represents an anionic counterion; d) of the following formula (IV): ## STR2 ## C1-C6 alkyl groups and the hydroxyalkyl or dihydroxyalkyl groups C1-C6, R23 is selected from: o - the group R26 C-0 R24 - the linear or branched C1-C22 alkyl groups C1-C22, saturated or unsaturated, - the hydrogen atom, R25 is chosen from: o - the group R28 C., - the linear or branched C1-C6 hydrocarbon groups R29, saturated or unsaturated, - the hydrogen atom, - R24, R26 and R28, which are identical or different, are chosen from linear or branched, saturated or unsaturated C 7 -C 21 hydrocarbon-based groups; r, s and t, which may be identical or different, are integers of from 2 to 6, r1 and t1 which are identical or different, equal to 0 or 1 with r2 + r1 = 2r and t1 + t2 = 2t - y is an integer from 1 to 10, - x and z, which may be identical or different, are integers ranging from 0 to 10, X 1 represents an anionic counterion, organic or inorganic, provided that the sum x + y + z is from 1 to 15, that when x is 0 then R23 is R27 and when z is 0 then R25 is R29; 5. Composition according to any one of the preceding claims, in which the cationic surfactant or surfactants are chosen from tetraalkylammonium halides, such as tetraalkylammonium chlorides, for example tetraalkylammonium or alkyltrimethylammonium halides, such as dialkyldimethylammonium chlorides. or alkyltrimethylammonium in which the alkyl group contains about 12 to 22 carbon atoms, in particular the halides, in particular behenyltrimethylammonium, distearyl dimethyl ammonium, cetyltrimethylammonium, benzyldimethylstearylammonium chlorides or else palmitylamidopropyl chloride. trimethylammonium and their mixtures. 6. Composition according to any one of the preceding claims, in which the cationic surfactant or surfactants are chosen from cetyltrimethylammonium, behenyltrimethylammonium and dipalmitoylethylhydroxyethylmethylammonium salts, and mixtures thereof, and more particularly behenyltrimethylammonium chloride, cetyltrimethylammonium chloride, dipalmitoylethylhydroxyethylammonium methosulfate, and mixtures thereof. 7. Composition according to any one of the preceding claims, in which the cationic surfactant or surfactants chosen from tertiary, optionally polyoxyalkylenated fatty amines or their salts and quaternary ammonium salts are present in an amount ranging from 0.01 to 30% by weight. preferably from 0.05 to 20% by weight, more preferably from 0.1 to 10% by weight relative to the total weight of the composition. 8. Composition according to any one of the preceding claims, characterized in that it comprises at least one alkaline agent chosen from water-soluble silicates such as alkali metal or alkaline-earth metal silicates, alkali metal basic or tribasic phosphate di-phosphates. or: alkaline earth metals or alkali metal or alkaline earth metal carbonates, and mixtures thereof. 9. Composition according to the preceding claim, characterized in that the alkaline agent (s) are in an amount of between 0.1 and 40%, preferably between 0.5 and 30% by weight and better still between 1 and 25% by weight of the product. total weight of the composition. 10. Composition according to any one of the preceding claims, characterized in that it comprises at least one rheology modifier selected from hydrophilic thickeners, amphiphilic polymers comprising at least one hydrophobic chain, fillers and mixtures thereof. 11. Composition according to any one of the preceding claims, characterized in that it comprises at least one disintegrant chosen from celluloses and cellulose derivatives, crosslinked polyacrylates, crosslinked polyvinylpyrrolidone, soy polysaccharides, alginates, aluminum silicates and their derivatives, hydrophilic silicas and mixtures thereof. 12. Composition according to any one of the preceding claims, characterized in that it comprises an organic inert phase, preferably liquid, preferably selected from the group consisting of polydecenes of formula C10nFIR20n) +21 in which n varies from 3 at 9 and preferably from 3 to 7, esters of fatty alcohols or fatty acids, and mixtures thereof. 13. Composition according to any one of the preceding claims, characterized in that it comprises at least one additional surfactant, preferably anionic or nonionic. 14. A process for bleaching keratinous fibers comprising applying to the keratinous fibers a composition according to one of claims 1 to 13, in the presence of an aqueous composition. 15. The method of claim 14, characterized in that the aqueous composition comprises an oxidizing agent, preferably hydrogen peroxide.