FR3007642A1 - CAPILLARY CLARIFICATION COMPOSITION COMPRISING TWO BASIC AGENTS, AN ACID AND AN OXIDIZING AGENT - Google Patents

Abstract

The present invention relates to a lightening composition for keratinous fibers, in particular human keratinous fibers such as the hair, comprising (a) one or more organic alkaline agents having a molecular weight less than or equal to 300 g / mol-1, ( b) one or more inorganic alkaline agents, (c) one or more organic or inorganic acids and (d) one or more oxidizing agents; the pH of the composition being greater than or equal to 7. The invention also relates to a lightening process using said composition and a multi-compartment device, suitable for the implementation of said lightening composition.

Description

The present invention relates to a composition for lightening keratinous fibers, in particular human keratinous fibers such as the hair, comprising (a) one or more organic bases. or their salts, these compounds having a molecular weight less than or equal to 300 g.mol -1, (b) one or more inorganic bases, (c) one or more organic or inorganic acids and (d) one or more oxidizing agents; the pH of the composition being greater than or equal to 7. The invention also relates to a lightening process using said composition and a multi-compartment device, suitable for the implementation of said lightening composition. The present invention relates to the field of lightening keratin fibers and more particularly to that of capillary lightening. The processes for lightening human keratin fibers that are usually used consist in using an aqueous composition comprising at least one oxidizing agent, under alkaline pH conditions in the vast majority of cases. This oxidizing agent has the role of degrading the melanin of the hair, which, depending on the nature of the oxidizing agent present, leads to a more or less pronounced lightening of the fibers. Thus, for relatively low lightening, the oxidizing agent is generally hydrogen peroxide. When greater lightening is desired, it is customary to use peroxygenated salts, such as persulfates for example, in the presence of hydrogen peroxide. One of the difficulties is that the lightening process is carried out under alkaline conditions and the most commonly used alkaline agent is ammonia.

The use of ammonia is particularly advantageous in this type of process. Indeed, it makes it possible to adjust the pH of the composition to an alkaline pH to allow the activation of the oxidizing agent. But this alkaline agent also causes swelling of the keratin fiber, with an opening of the scales, which promotes the penetration of the oxidizing agent inside the fiber, and thus increases the efficiency of the reaction. However, this alkalizing agent is very volatile, which causes inconvenience to the user because of the strong characteristic smell, rather annoying ammonia that emerges during the process. In addition, the amount of ammonia released requires the use of higher levels than necessary to compensate for this loss. This is not without consequences for the user who remains not only bothered by the smell but may also be faced with greater risks of intolerance, such as irritation of the scalp resulting in particular tingling. It has also been proposed to replace all or part of the ammonia with one or more other conventional alkalizing agents, however the solutions proposed so far do not lead to compositions as effective as those based on ammonia, in particular because that these alkalinizing agents do not lead to sufficient lightening of the pigmented fibers in the presence of the oxidizing agent.

Thus, one of the objectives of the present invention is to provide compositions for lightening human keratin fibers such as the hair which do not have the drawbacks mentioned above, that is to say which are capable of leading to very good lightening performance while having better use qualities than existing compositions, including having a less unpleasant odor when applied to the fibers or during their preparation. These and other objects are achieved by the present invention which therefore relates to a cosmetic composition for the lightening of keratinous fibers, in particular human keratinous fibers such as the hair, comprising: (a) one or more organic bases or their salts, these compounds having a molecular weight less than or equal to 300 g.mo1-1, (b) one or more inorganic bases, (c) one or more organic or inorganic acids in a content greater than or equal to 0.2 % by weight relative to the total weight of the dye composition, and (d) one or more oxidizing agents; the subject of the present invention is also a process for lightening keratinous fibers, in particular human keratinous fibers such as the hair, in which the composition of said fibers is applied to said fibers. lightening according to the invention.

The invention also relates to a multi-compartment device for implementing the composition according to the invention. The compositions according to the invention thus make it possible to lead to very good lightening performance of keratinous fibers. Moreover, the lightening process according to the invention also makes it possible to use less smelly compositions when they are applied to the keratinous fibers or during their preparation.

In addition, at equal effectiveness the compositions according to the invention have a substantially lower pH compared to existing lightening compositions which induces a better comfort for the scalp. Other characteristics and advantages of the invention will emerge more clearly on reading the description and examples which follow. In what follows, and unless otherwise indicated, the boundaries of a domain of values are included in this field.

The human keratinous fibers treated by the process according to the invention are preferably the hair. The expression "at least one" is equivalent to the expression "one or more". (a) Organic bases The lightening composition according to the invention contains one or more organic bases or their salts, these compounds having a molecular weight less than or equal to 300 g.mo1-1. The organic bases or their salts used in the composition according to the invention are more particularly chosen from amines, and preferably from organic amines whose pKb at 25 ° C. is less than 12, and preferably less than 10, even more advantageously less than 6. It should be noted that this is the pKb corresponding to the highest basicity function. According to a first variant of the invention, the organic base comprises a primary, secondary or tertiary amine function, and one or more linear or branched C 1 -C 8 alkyl groups carrying one or more hydroxyl radicals. In particular, the organic bases chosen from alkanolamines such as mono-, di- or trialkanolamines comprising one to three identical or different C 1 -C 4 hydroxyalkyl radicals are suitable.

Among compounds of this type, mention may be made of monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, N-dimethylaminoethanolamine, 2-amino-2-methyl-1-propanol, triisopropanolamine, 2-amino -2-methyl-1,3-propanediol, 3-amino-1,2-propanediol, 3-dimethylamino-1,2-propanediol, tris-hydroxymethylaminomethane. Organic bases of the following formula are also suitable: embedded image in which W is a C 1 -C 6 alkylene radical optionally substituted with a hydroxyl group or a C 1 -C 6 alkyl radical; Rx, Ry, Rz and Rt, identical or different, represent a hydrogen atom, a C1-C6 alkyl or C1-C6 hydroxyalkyl, C1-C6 aminoalkyl radical. Examples of such amines include 1,3-diaminopropane, 1,3-diaminopropanol, spermine and spermidine.

According to a second variant of the invention, the organic base is chosen from amino acids. More particularly, the amino acids that can be used are of natural or synthetic origin, in their L, D, or racemic form, and comprise at least one acid function chosen more particularly from the carboxylic, sulphonic, phosphonic or phosphoric acid functions. Amino acids can be in neutral or ionic form. Advantageously, the amino acids are basic amino acids comprising an additional amine function optionally included in a ring or in a ureido function. Such basic amino acids are preferably chosen from those corresponding to the following formula (I): ## STR2 ## where R denotes a group chosen from: - (CH 2) 3 NH 2 - (CH 2) 2 NH 2 - (CH2) 2NHCONH2; The compounds corresponding to formula (I) are histidine, lysine, arginine, ornithine, citrulline. As amino acids that may be used in the present invention, mention may in particular be made of aspartic acid, glutamic acid, alanine, arginine, ornithine, citrulline, asparagine, carnitine and cysteine. , glutamine, glycine, histidine, lysine, isoleucine, leucine, methionine, N-phenylalanine, proline, serine, taurine, threonine, tryptophan, tyrosine and valine. Particularly preferred amino acids are arginine, lysine, histidine or mixtures thereof. According to a third variant of the invention, the organic base is chosen from heterocyclic organic amines. In addition to the histidine already mentioned in the amino acids, mention may be made, in particular, of pyridine, piperidine, imidazole, triazole, tetrazole and benzimidazole. According to a fourth variant of the invention, the organic base is chosen from dipeptides of amino acids. As amino acid dipeptides that may be used in the present invention, carnosine, anserine and balenine may be mentioned in particular. According to a fifth variant of the invention, the organic base is chosen from compounds comprising a guanidine function. Thus, the organic amine may be chosen from guanidine, arginine already mentioned as amino acid, creatine, creatinine, 1,1-dimethylguanidine, 1,1-diethylguanidine, glycocyamine, metformin, agmatine, n-amidinoalanine, 3-guanidinopropionic acid, 4-guanidinobutyric acid and 2-damino (imino) methyl] amino) ethane-1-sulfonic acid.

As regards the salts of the abovementioned amines, the latter may be organic or inorganic. More particularly, the organic salts are chosen from salts of organic acids such as citrates, lactates, glycolates, gluconates, acetates, propionates, fumarates, oxalates and tartrates. Even more particularly, the inorganic salts are chosen from halohydrates (hydrochlorides for example), carbonates, hydrogenocarbonates, sulphates, hydrogen phosphates and phosphates. Preferably, the organic base is an alkanolamine. More particularly, the organic base is 2-amino-2-methyl-1-propanol, monoethanolamine or mixtures thereof. Even more preferentially, the organic base is monoethanolamine. The organic base (s) or their salts may be present in the lightening composition according to the invention in a content ranging from 0.1 to 10% by weight, preferably in a content ranging from 1 to 4% by weight, and more preferably in a content ranging from 1.5 to 2.5% by weight relative to the total weight of the composition. (c) Mineral bases The lightening composition according to the invention also contains one or more mineral bases. For the purposes of the present invention, the term "inorganic base" means ammonia or any compound having in its structure one or more elements of columns 1 to 13 of the periodic table of elements other than hydrogen. Preferably, the mineral bases used in the dyeing composition do not comprise in their structure one or more nitrogen atoms. According to one embodiment, the mineral base (s) contain one or more elements of columns 1 and 2 of the periodic table of elements other than hydrogen. In a preferred variant, the mineral base or bases have the following structure (T): (Z1x '). (Z2Y +). (T) wherein: Z2 denotes a metal of columns 1 to 13 of the periodic table of the elements, preferably 1 or 2, such as sodium or potassium; Z 1 'denotes an anion chosen from the ions CO 3 O, OH-, HCO 2 O, SiO 2 O-, HPO 4 2-, PO 4 2-, B 4 O 2-, preferably from the ions CO 3 O-, OH-, SiO 2 2-; x is 1, 2 or 3; y is 1, 2, 3 or 4; m and n are independently of one another 1, 2, 3 or 4; with n.y = m.x. Preferably, the mineral base corresponds to the following formula (Zix-) m (Z2Y +)., Wherein Z2 denotes a metal of columns 1 and 2, of the periodic table of the elements; Z1 'denotes an anion selected from the ions CO32-, OH-, HC032-, Si032-, x is 1, y is 1 or 2, m and n are independently of each other 1 or 2 with n.y = m.x. As a mineral base (T) used according to the invention, mention may be made of sodium carbonate, potassium carbonate, sodium bicarbonate, sodium hydroxide, potassium hydroxide, sodium metasilicate and potassium metasilicate. Preferably, alkaline bicarbonate. The mineral base or bases may be the mineral base is a carbonate or a present in the lightening composition according to the invention in a content ranging from 0.1 to 20% by weight, preferably in a content ranging from 1 to 10% by weight. weight, and more preferably in a content ranging from 2 to 6% by weight relative to the total weight of the composition. (d) Organic or inorganic acids The lightening composition according to the invention contains one or more organic or inorganic acids in a content greater than or equal to 0.2% by weight relative to the total weight of the dyeing composition.

For the purposes of the present invention, the term "organic or inorganic acid" means an organic or inorganic acid and / or its associated bases having a pKa of less than or equal to 7, preferably less than or equal to 6, especially ranging from 1 to 6, preferably from 2 to 5. In a first variant, the acids used in the dye composition according to the invention are chosen from organic acids, in particular carboxylic and / or sulphonic acids. More preferentially, the organic acids are chosen from saturated or unsaturated carboxylic acids, in particular propanoic acid, butanoic acid, acetic acid, lactic acid, citric acid, maleic acid and the like. glycolic acid, salicylic acid, malic acid and tartaric acid. Preferably, the carboxylic acids are hydroxy acids. Preferably, the acids used in the dyeing composition are chosen from tartaric acid, lactic acid, citric acid or their mixtures. In a second variant, the acids used in the dyeing composition according to the invention are chosen from inorganic acids and in particular from hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid and in particular from hydrochloric or phosphoric acids. Preferably the inorganic acid (or mineral acid) is phosphoric acid. The organic or inorganic acid or acids may be present in the dyeing composition according to the invention in a content ranging from 0.2 to 10% by weight, preferably in a content ranging from 0.2 to 2% by weight, and more preferably in a content ranging from 0.2 to 1% by weight relative to the total weight of the composition. (e) Oxidizing Agent The lightening composition according to the invention further comprises one or more oxidizing agents.

More particularly, the oxidizing agent (s) is (are) chosen from hydrogen peroxide, urea peroxide, alkali metal bromates or ferricyanides, peroxygenated salts such as, for example, persulfates, perborates, peracids and their precursors, and alkali or alkaline earth metal percarbonates. This oxidizing agent is advantageously constituted by hydrogen peroxide and especially in aqueous solution (hydrogen peroxide) whose concentration may vary, more particularly from 0.1 to 50% by weight, and even more preferably from 0.5 to 20% by weight. by weight, better from 1 to 15% by weight relative to the dyeing composition. Depending on the desired degree of lightening, the oxidizing agent may also comprise an oxidizing agent preferably chosen from the peroxygenated salts pH of the composition. The lightening composition has a pH greater than or equal to 7. Preferably, the pH of the the dyeing composition varies from 7 to 11, more preferably from 8 to 10 and more preferably from 8.5 to 9.5. According to an advantageous embodiment, the lightening composition according to the invention comprises: (a) one or more organic bases having a molecular weight less than or equal to 300 g.mol -1-1 chosen from alkanolamines, in particular monoethanolamine, (b) one or more inorganic bases selected from inorganic bases having one or more elements of columns 1 and 2 of the periodic table of elements other than hydrogen, in particular alkali carbonates or bicarbonates, (c) one or more organic acids or inorganic in a content greater than or equal to 0.2% by weight relative to the total weight of the composition, and (d) one or more oxidizing agents; the pH of said composition being greater than or equal to 7. Preferably, according to this embodiment, the pH of the composition varies from 7 to 9.5, and more preferably from 8 to 9.

Fatty substance Preferably, the lightening composition according to the invention further comprises 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%). They have in their structure at least one hydrocarbon chain comprising 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. Preferably, the fatty substances of the invention do not contain salified or non-salified carboxylic acid groups (-C (O) OH or C (O) O-). In particular, the fatty substances of the invention are neither polyoxyalkylenated nor polyglycerolated.

Preferably, the fatty substances that can be used in the composition according to the invention are non-silicone oils. By "oil" is meant a "fat" which is liquid at room temperature (25 ° C), and at atmospheric pressure (760 mm Hg).

The term "non-silicone oil" means an oil containing no silicon atom (Si) and a "silicone oil" an oil containing at least one silicon atom. More particularly, the fatty substances are chosen from C 6 -C 16 hydrocarbons, hydrocarbons having more than 16 carbon atoms, non-silicone oils of animal origin, vegetable oils of triglyceride type, synthetic triglycerides, fluorinated oils, fatty alcohols, esters of fatty acids and / or fatty alcohol different from triglycerides and vegetable waxes, non-silicone waxes, silicones. It is recalled that for the purposes of the invention, the alcohols, esters and fatty acids more particularly have one or more linear or branched hydrocarbon groups, saturated or unsaturated, comprising 6 to 30 carbon atoms, which are optionally substituted, in particular by one or more hydroxyl groups (in particular 1 to 4). If unsaturated, these compounds may comprise one to three carbon-carbon double bonds, conjugated or otherwise. With regard to the C6-C16 hydrocarbons, the latter are linear, branched, optionally cyclic and preferably alkanes. By way of example, mention may be made of hexane, dodecane and isoparaffins, such as isohexadecane and isodecane. As hydrocarbon oils of animal origin, mention may be made of perhydrosqualene.

Triglyceride oils of vegetable or synthetic origin are preferably chosen from liquid triglycerides of fatty acids containing from 6 to 30 carbon atoms, for example triglycerides of heptanoic or octanoic acids or, for example, sunflower oil or corn oil. , soya, squash, grape seed, sesame, hazelnut, apricot, macadamia, arara, sunflower, castor oil, avocado, triglycerides of caprylic / capric acids such as those sold by Stearineries Dubois or those sold under the names Miglyol® 810, 812 and 818 by the company Dynamit Nobel, jojoba oil, shea butter oil; The linear or branched hydrocarbons, of mineral or synthetic origin, of more than 16 carbon atoms, are preferably chosen from paraffin oils, petroleum jelly, liquid petroleum jelly, polydecenes, hydrogenated polyisobutene such as Parleam® . The fluorinated oils may be chosen from perfluoromethylcyclopentane and perfluoro-1,3-dimethylcyclohexane, sold under the names "FLUTEC® PC1" and "FLUTEC® PC3" by BNFL Fluorochemicals; perfluoro-1,2-dimethylcyclobutane; perfluoroalkanes such as dodecafluoropentane and tetradecafluorohexane, sold under the names "PF 5050®" and "PF 5060®" by the company 3M, or bromoperfluorooctyl sold under the name "Foralkyl®" by the company Atochem; nonafluoro-methoxybutane and nonafluoroethoxyisobutane; perfluoromorpholine derivatives, such as 4-trifluoromethyl perfluoromorpholine sold under the name "PF 5052®" by the company 3M. The fatty alcohols that can be used in the composition according to the invention are saturated or unsaturated, linear or branched, and contain from 6 to 30 carbon atoms and more particularly from 8 to 18 carbon atoms. There may be mentioned, for example, cetyl alcohol, stearyl alcohol and their mixture (cetylstearyl alcohol), octyldodecanol, 2-butyloctanol, 2-hexyldecanol, 2-undecylpentadecanol, oleic alcohol or linoleic alcohol. .

The wax or waxes that may be used in the composition according to the invention are chosen in particular from Carnauba wax, Candelila wax, and Alfa wax, paraffin wax, ozokerite and waxes. vegetable oils such as olive wax, rice wax, hydrogenated jojoba wax or absolute waxes of flowers such as the essential wax of blackcurrant flower sold by the company BERTIN (France), animal waxes such as waxes bees, or modified beeswaxes (cerabellina); other waxes or waxy raw materials that can be used according to the invention are, in particular, marine waxes, such as the one sold by SOPHIM under the reference M82, and polyethylene or polyolefin waxes in general. With regard to the fatty acid esters and / or fatty alcohols, advantageously different from the triglycerides mentioned above, mention may be made in particular of esters of saturated or unsaturated, linear or branched C 1 -C 26 aliphatic mono- or polyacids and of saturated or unsaturated, linear or branched C1-C26 aliphatic mono- or polyalcohols, the total number of carbon of the esters being more particularly greater than or equal to 10.

Among the monoesters, mention may be made of dihydroabiethyl behenate; octyldodecyl behenate; isoketyl behenate; cetyl lactate; C12-C15 alkyl lactate; isostearyl lactate; lauryl lactate; linoleyl lactate; oleyl lactate; (iso) stearyl octanoate; isocetyl octanoate; octyl octanoate; cetyl octanoate; decyl oleate; isocetyl isostearate; isocetyl laurate; isocetyl stearate; isodecyl octanoate; isodecyl oleate; isononyl isononanoate; isostearyl palmitate; methyl ricinoleate acetyl; myristyl stearate; octyl isononanoate; 2-ethylhexyl isononanoate; octyl palmitate; octyl pelargonate; octyl stearate; octyldodecyl erucate; oleyl erucate; ethyl and isopropyl palmitates, ethyl-2-hexyl palmitate, 2-octyldecyl palmitate, alkyl myristates such as isopropyl, butyl, cetyl, 2-octyldodecyl myristate; , styryl, hexyl stearate, butyl stearate, isobutyl stearate; dioctyl malate, hexyl laurate, 2-hexyldecyl laurate. Still within the context of this variant, it is also possible to use esters of C 4 -C 22 di or tricarboxylic acids and of C 1 -C 22 alcohols and esters of mono di or tricarboxylic acids and of di, tri, alcohols. C2-C26 tetra or pentahydroxy. These include: diethyl sebacate; diisopropyl sebacate; diisopropyl adipate; di-propyl adipate; dioctyl adipate; diisostearyl adipate; dioctyl maleate; glyceryl undecylenate; octyldodecyl stearoyl stearate; pentaerythrityl monoricinoleate; pentaerythrityl tetraisononanoate; pentaerythrityl tetrapelargonate; pentaerythrityl tetraisostearate; pentaerythrityl tetraoctanoate; propylene glycol dicaprylate; propylene glycol dicaprate, tridecyl erucate; triisopropyl citrate; triisotearyl citrate; glyceryl trilactate; glyceryl trioctanoate; trioctyldodecyl citrate; trioleyl citrate, propylene glycol dioctanoate; neopentyl glycol diheptanoate; diethylene glycol diisanonate; and polyethylene glycol distearates. Among the esters mentioned above, it is preferred to use ethyl, isopropyl, myristyl, cetyl, stearyl palmitates, ethyl-2-hexyl palmitate, 2-octyldecyl palmitate, myristates of alkyls such as isopropyl, butyl, cetyl, 2-octyldodecyl myristate, hexyl stearate, butyl stearate, isobutyl stearate; dioctyl malate, hexyl laurate, 2-hexyldecyl laurate and isononyl isonononate, cetyl octanoate.

The composition may also comprise, as fatty ester, esters and diesters of C 6 -C 30, preferably C 12 -C 22, fatty acid sugars. It is recalled that "sugar" is understood to mean oxygenated hydrocarbon compounds which have several alcohol functions, with or without an aldehyde or ketone function, and which contain at least 4 carbon atoms. These sugars can be monosaccharides, oligosaccharides or polysaccharides. Suitable sugars include, for example, sucrose (or sucrose), glucose, galactose, ribose, fucose, maltose, fructose, mannose, arabinose, xylose, lactose, and their derivatives. especially alkyls, such as methyl derivatives such as methylglucose. The esters of sugars and fatty acids may be chosen in particular from the group comprising the esters or mixtures of esters of sugars described above and of C 6 -C 30, preferably C 12 -C 22 fatty acids, linear or branched, saturated or unsaturated. If unsaturated, these compounds may comprise one to three carbon-carbon double bonds, conjugated or otherwise. The esters according to this variant may also be chosen from mono-, di-, tri- and tetraesters, polyesters and mixtures thereof. These esters may be for example oleate, laurate, palmitate, myristate, behenate, cocoate, stearate, linoleate, linolenate, caprate, arachidonates, or mixtures thereof, such as, in particular, the mixed oleo-palmitate, oleostearate and palmito-stearate esters. More particularly, the mono- and di-esters are used, and especially the mono- or dioleate, stearate, behenate, oleopalmitate, linoleate, linolenate, oleostearate, 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, SL40 by the company Crodesta, respectively denoting sucrose palmito-stearates of 73% monoester and 27% di- and tri-ester, 61% monoester and 39% di-, tri- and tetraester, 52% monoester and 48% di-, tri- and tetraester, 45% monoester and 55% di-, tri- and tetraester, 39% monoester and 61% di-, tri- and tetraester , 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. The silicones that can be used in accordance with the invention can be in the form of oils, waxes, resins or gums.

Preferably, the silicone is chosen from polydialkylsiloxanes, especially polydimethylsiloxanes (PDMS), and organomodified polysiloxanes comprising at least one functional group chosen from amino groups, aryl groups and alkoxy groups. Organopolysiloxanes are further defined in Walter Noll's "Chemistry and Technology of Silicones" (1968), Academie Press. They can be volatile or nonvolatile. When they are volatile, the silicones are more particularly chosen from those having a boiling point of between 60 ° C. and 260 ° C., and even more particularly from: (i) cyclic polydialkylsiloxanes containing from 3 to 7, preferably from 4 to 5 silicon atoms. It is, for example, octamethylcyclotetrasiloxane sold in particular under the name VOLATILE SILICONE® 7207 by UNION CARBIDE or SILBIONE® 70045 V2 by RHODIA, decamethylcyclopentasiloxane marketed under the name VOLATILE SILICONE® 7158 by UNION CARBIDE, and SILBIONE ® 70045 V5 by RHODIA, as well as their mixtures.

Mention may also be made of cyclocopolymers of the dimethylsiloxane / methylalkylsiloxane type, such as the VOLATILE® SILICONE FZ 3109 sold by UNION CARBIDE, of the formula: ## STR5 ## with D ": Si-O with D ': CH3 mention may also be made of mixtures of cyclic polydialkylsiloxanes with organic compounds derived from silicon, such as the mixture of octamethylcyclotetrasiloxane and tetramethylsilylpentaerythritol (50/50) and the mixture of octamethylcyclotetrasiloxane and oxy-1 , 1 '- (hexa-2,2,2', 2 ', 3,3'-trimethylsilyloxy) bis-neopentane, (ii) linear volatile polydialkylsiloxanes having 2 to 9 silicon atoms and having a viscosity less than or equal to 5.10-6 m 2 / s at 25 ° C. It is, for example, decamethyltetrasiloxane marketed in particular under the name "SH 200" by Toray Silicone, silicones entering this class are also described in the published article. in Cosmetics and Toiletries, Vol 91, Jan. 76, p. 27-32 - TODD & BYERS "Volatile Silicone fluids for cosmetics". Non-volatile polydialkylsiloxanes, polydialkylsiloxane gums and resins, polyorganosiloxanes modified with the above organofunctional groups and mixtures thereof are preferably used.

These silicones are more particularly chosen from polydialkylsiloxanes, among which may be mentioned mainly polydimethylsiloxanes with trimethylsilyl end groups. The viscosity of the silicones is measured at 25 ° C. according to ASTM 445 Appendix C.

Among these polydialkylsiloxanes, mention may be made, without limitation, of the following commercial products: SILBIONE® oils of the 47 and 70 047 series or the MIRASIL® oils marketed by RHODIA, such as, for example, the 70 047 V 500 000 oil; the oils of the MIRASIL® series marketed by RHODIA; the oils of the 200 series of Dow Corning, such as DC200 having a viscosity of 60,000 mm 2 / s; - VISCASIL® oils from GENERAL ELECTRIC and some oils from SF series (SF 96, SF 18) from GENERAL ELECTRIC. Mention may also be made of polydimethylsiloxane dimethylsilanol end groups known under the name of dimethiconol (CTFA), such as the oils of the 48 series from Rhodia.

In this class of polydialkylsiloxanes, mention may also be made of the products sold under the names "ABIL WAX® 9800 and 9801" by GOLDSCHMIDT, which are polydialkyl (C 1 -C 20) siloxanes.

The silicone gums that can be used in accordance with the invention are in particular polydialkylsiloxanes, preferably polydimethylsiloxanes having high average molecular weights of between 200,000 and 1,000,000 used alone or in a mixture in a solvent. This solvent may be chosen from volatile silicones, polydimethylsiloxane (PDMS) oils, polyphenylmethylsiloxane (PPMS) oils, isoparaffins, polyisobutylenes, methylene chloride, pentane, dodecane, tridecane or their mixtures. More particularly useful products according to the invention are mixtures such as: - mixtures formed from a hydroxyl end-of-the-chain polydimethylsiloxane, or dimethiconol (CTFA) and a cyclic polydimethylsiloxane also called cyclomethicone (CTFA) such that the product Q2 1401 marketed by the company Dow Corning; mixtures of a polydimethylsiloxane gum and a cyclic silicone such as the product SF 1214 Silicone Fluid from the company General Electric, this product is an SF 30 gum corresponding to a dimethicone, having a number average molecular weight of 500,000 solubilized in oil SF 1202 Silicone Fluid corresponding to decamethylcyclopentasiloxane; mixtures of two PDMSs of different viscosities, and more particularly of a PDMS gum and a PDMS oil, such as the product SF 1236 from the company General Electric. The product SF 1236 is the mixture of an SE 30 gum defined above having a viscosity of 20 m 2 / s and an SF 96 oil with a viscosity of 5 × 10 -6 m 2 / s. This product preferably comprises 15% of SE 30 gum and 85% of an SF 96 oil.

The organopolysiloxane resins used in accordance with the invention are crosslinked siloxane systems containing the units: R 2 SiO 2 O 12, R 3 SiO 11 2, RSiO 3 12 and SiO 4/2 in which R represents an alkyl having 1 to 16 carbon atoms. Among these products, those that are particularly preferred are those in which R denotes a C1-C4 lower alkyl group, more particularly methyl. Among these resins may be mentioned the product sold under the name "Dow Corning 593" or those sold under the names "Silicone Fluid SS 4230 and SS 4267" by the company General Electric and which are silicones of dimethyl / trimethyl siloxane structure. Mention may also be made of the trimethylsiloxysilicate type resins sold in particular under the names X22-4914, X21-5034 and X21-5037 by the company Shinet Su. The organomodified silicones that may be used in accordance with the invention are silicones as defined above and comprising in their structure one or more organofunctional groups attached via a hydrocarbon-based group. The organomodified silicones may be polydiarylsiloxanes, in particular polydiphenylsiloxanes, and polyalkylarylsiloxanes functionalized with the organofunctional groups mentioned above. The polyalkylarylsiloxanes are particularly chosen from polydimethyl / methylphenylsiloxanes, linear and / or branched polydimethyl / diphenylsiloxanes with a viscosity ranging from 1 × 10 -5 to 5 × 10 -2 m 2 / s at 25 ° C. Among these polyalkylarylsiloxanes, mention may be made by way of example of the products sold under the following names: SILBIONE® oils of the 70 641 series from RHODIA; - the RHODORSIL® 70 633 and 763 RHODIA series of oils; - DOW CORNING 556 COSMETIC GRAD FLUID oil from Dow Corning; the silicones of the PK series of BAYER, such as the product PK20; the silicones of the PN, PH series of BAYER, such as the PN1000 and PH1000 products; certain oils of the SF series of GENERAL ELECTRIC such as SF 1023, SF 1154, SF 1250 and SF 1265. Among the organomodified silicones, mention may also be made of polyorganosiloxanes comprising: substituted or unsubstituted amino groups, such as the products sold under the name GP 4 Silicone Fluid and GP 7100 by the company GENESEE or the products sold under the names Q2 8220 and Dow Corning 929 or 939 by Dow Corning. The substituted amino groups are, in particular, C1-C4 aminoalkyl groups; alkoxylated groups, such as the product marketed under the name "Silicone Copolymer F-755" by SWS Silicones and Abil Wax® 2428, 2434 and 2440 by the company GOLDSCHMIDT. Preferably, the fatty substances that can be used in the lightening composition according to the invention are non-silicone.

More particularly, the fatty substances are chosen from liquid or pasty compounds at room temperature (25 ° C.) and at atmospheric pressure. Preferably, the fatty substance is a liquid compound at a temperature of 25 ° C. and at atmospheric pressure (oils).

Even more preferentially, as indicated above, the fatty substances used in the lightening composition according to the invention are liquid and non-silicone. The fatty substances are advantageously chosen from C 6 -C 16 hydrocarbons, hydrocarbons having more than 16 carbon atoms, triglycerides, fatty alcohols, fatty acid esters and / or fatty alcohol esters other than triglycerides, or their mixtures. Preferably, the fatty substance (s) is (are) chosen from liquid petroleum jelly, polydecenes, liquid fatty alcohols, esters of fatty acids and / or of liquid fatty alcohols, or mixtures thereof. Even more preferentially, the fatty substances are chosen from liquid petroleum jelly and octyldodecanol. The composition according to the invention may comprise at least a total of 10% by weight of fatty substances, preferably non-silicone, in particular oils which are preferably non-silicone, relative to the total weight of the composition of the invention. More particularly, the composition according to the invention may comprise at least 15% by weight, better still at least 20% by weight, more preferably at least 25% by weight of preferably non-silicone fatty substances, in particular oils which are preferably not silicone, relative to the total weight of the composition. The composition according to the invention more particularly has a content of preferably non-silicone fatty substances, in particular of oils, preferably non-silicone, ranging from 10 to 80% by weight, more preferably from 15 to 80% by weight, of preferably 25 to 75% by weight, more preferably 30 to 70% by weight, still more preferably 30 to 60% by weight, based on the weight of the composition.

Surfactants The brightening composition may further contain one or more surfactants. Preferably, the surfactant or surfactants are chosen from nonionic or anionic surfactants.

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 -C (O) OH, -C (O) O-, -SO3H, -S (O) 20-, -OS (O) 20H, -OS (O) 20- groups. - P (O) OH 2, -P (O) 20 -, - P (O) O 2 -, -P (OH) 2, = P (O) OH, -P (OH) O-, = P (0) 0-, = POH, = PO-, the anionic moieties comprising a cationic counter ion such as an alkali metal, alkaline earth metal, or ammonium.

As examples of anionic surfactants that may be used in the composition according to the invention, mention may be made of alkyl sulphates, alkyl ether sulphates, alkylamido ether sulphates, alkylaryl polyether sulphates, monoglyceride sulphates, alkyl sulphonates and alkyl amide sulphonates. alkylarylsulfonates, alpha-olefin-sulfonates, paraffin-sulfonates, alkylsulfosuccinates, alkylethersulfosuccinates, alkylamidesulfosuccinates, alkylsulfoacetates, 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 acid salts amidoether carboxylic acids, and the corresponding non-salified forms of all these compounds, alkyl and acyl groups of all these compounds having from 6 to 24 carbon atoms and the aryl group denoting a phenyl group. These compounds may be oxyethylenated and then preferably comprise from 1 to 50 ethylene oxide units. The salts of C 6 -C 24 alkyl monoesters and of polyglycoside-polycarboxylic acids may be chosen from C 6 -C 24 alkyl polyglycoside-citrates, C 6 -C 24 alkyl polyglycoside-tartrates and polyglycoside-sulphosuccinates. C6-C24 alkyl. 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 salts and in particular aminoalcohols or alkaline earth metal salts such as magnesium salts.

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 triisopropanolamine and the salts of 2-amino-2-methyl-1-one. 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. Of the abovementioned anionic surfactants, it is preferred to use (C 6 -C 24) alkyl sulphates, C 6 -C 24 alkyl ether sulphates comprising from 2 to 50 ethylene oxide units, in particular in the form of alkali metal or ammonium salts. , aminoalcohols, and alkaline earth metals, or a mixture of these compounds. In particular, it is preferred to use (C 12 -C 20) alkyl sulphates, C 12 -C 20 alkyl ether sulphates comprising from 2 to 20 ethylene oxide units, especially in the form of alkali metal salts, ammonium salts, aminoalcohol , and alkaline earth metals, or a mixture of these compounds. More preferably, it is preferred to use sodium lauryl ether sulfate with 2.2 moles of ethylene oxide. The additional nonionic surfactants are more particularly chosen from mono or polyoxyalkylenated, mono- or polyglycerolated nonionic surfactants. The oxyalkylenated units are more particularly oxyethylenated units, oxypropylene, or their combination, preferably oxyethylenated. As examples of oxyalkylenated nonionic surfactants, mention may be made of: oxyalkylenated (C 8 -C 24) alkyl phenols; - C8-C30 alcohols, saturated or unsaturated, linear or branched, oxyalkylenated - C8-C30 amides, saturated or unsaturated, linear or branched, oxyalkylenated - esters of C8-C30 acids, saturated or unsaturated, linear or branched, and polyethylene glycols; vegetable oils oxyethylenated, saturated or not; condensates of ethylene oxide and / or propylene oxide, among others, alone or in mixtures. oxyethylenated and / or oxypropylenated silicones, alkyl (poly) glucosides.

Surfactants having a number of moles of ethylene oxide and / or propylene of between 1 and 100, preferably between 2 and 50, preferably between 2 and 30. Advantageously, the nonionic surfactants do not comprise oxypropylene units.

According to a preferred embodiment of the invention, the additional nonionic surfactants are chosen from oxyalkylenated nonionic surfactants, in particular oxyethylenated C 8 -C 30 alcohols comprising from 1 to 100 moles of ethylene oxide, and alkylpolyglucosides.

By way of example of mono- or poly-glycerolated nonionic surfactants, the C 8 -C 40 mono- or polyglycerolated alcohols are preferably used. In particular, mono- or poly-glycerolated C8-C40 alcohols correspond to the following formula (V): R290- [CH2-CH (CH2OH) -O] '- H (V) Formula (V) in which: R29 represents a linear or branched C8-C40, preferably C8-C30, alkyl or alkenyl radical; and m represents a number ranging from 1 to 30 and preferably from 1 to 10. By way of example of compounds of formula (A8) which are suitable in the context of the invention, mention may be made of 4-lauryl alcohol. glycerol moles (INCI name: POLYGLYCERYL-4 LAURYL ETHER), lauric alcohol with 1.5 moles of glycerol, oleic alcohol with 4 moles of glycerol (INCI name: POLYGLYCERYL-4 OLEYL ETHER), oleic alcohol to 2 moles of glycerol (INCI name: POLYGLYCERYL-2 OLEYL ETHER), cetearyl alcohol to 2 moles of glycerol, cetearyl alcohol to 6 moles of glycerol, oleocetyl alcohol to 6 moles of glycerol, and octadecanol to 6 moles of glycerol.

The alcohol of formula (V) can represent a mixture of alcohols in the same way that the value of m represents a statistical value, which means that in a commercial product several polyglycerolated fatty alcohol species can coexist in the form of a mixed. Among the mono- or poly-glycerolated alcohols, it is more particularly preferred to use the C 8 / C 10 alcohol with one mole of glycerol, the alcohol with C 10 / C 12 with 1 mole of glycerol and the alcohol with Cie with 1.5 mole of glycerol.

Preferably, the additional surfactant used in the process of the invention in the composition is a mono or polyoxyalkylene nonionic surfactant, particularly mono- or polyoxyethylenated, mono or polyoxypropylenated, or a combination thereof, more particularly mono or poly - oxyethylenated.

The alkyl (poly) glycoside nonionic surfactant (s) may be represented by the following formula (VI): ## STR2 ## in which: R 1 represents a saturated or unsaturated, linear or branched alkyl group; , having about 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 having about 2 to 4 carbon atoms, G represents a saccharide unit comprising 5 to 6 carbon atoms, t denotes a value ranging from 0 to 10, preferably 0 to 4, and v denotes a value ranging from 1 to 15. Preferably, the alkyl (poly) glycoside nonionic surfactant (s) have the formula (VI) in which: R 1 denotes a linear or branched, saturated or unsaturated alkyl group having from 8 to 18 carbon atoms, G denotes glucose, fructose or galactose, and preferably glucose, denotes an allan value t from 0 to 3, and is preferably 0, and R2 and v are as defined above. The degree of polymerization of the alkyl (poly) glycoside nonionic surfactant (s), as represented for example by the index v in formula (VI), varies on average from 1 to 15, and preferably from 1 to 4. The degree of polymerization varies more particularly from 1 to 2, and more preferably from 1.1 to 1.5, on average. The glycosidic linkages between the saccharide units are in 1,6 or 1,4; and preferably 1.4. The compounds of formula (VI) that may be used in the present invention are especially 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) . It is also possible to use the products sold by the company SEPPIC under the trade names TRITON CG 110 (or ORAMIX CG 110) and TRITON CG 312 (or ORAMIX® NS 10), the products sold by BASF under the name LUTENSOL GD 70 or else those sold by CHEM Y under the name AG10 LK. It is also possible to use the alkyl (C 8 -C 16) polyglucoside in 1,4, for example in aqueous solution at 53% by weight of the total weight of the solution, marketed by COGNIS under the reference PLANTACARE® 818 UP. The nonionic surfactant that can be used in the composition according to the invention is the (C 8 -C 10) alkyl glucoside sold under the name Oramix CG 110 by the company SEPPIC.

Solvent The composition according to the invention may also comprise one or more organic solvents. Examples of organic solvents that may be mentioned include linear or branched C 2 -C 4 alkanols, such as ethanol and isopropanol; glycerol; polyols and polyol ethers such as 2-butoxyethanol, propylene glycol, dipropylene glycol, propylene glycol monomethyl ether, diethylene glycol monoethyl ether and monomethyl ether, and aromatic alcohols or ethers such as benzyl alcohol or phenoxyethanol, and mixtures thereof . The solvent or solvents, if present, represent a content usually ranging from 1 to 40% by weight relative to the weight of the composition and preferably from 5 to 30% by weight.

Other additives The composition according to the invention may also contain various adjuvants conventionally used in compositions for the dyeing of hair, such as anionic, cationic, nonionic, amphoteric or zwitterionic polymers or mixtures thereof; mineral thickeners, and in particular fillers such as clays, talc; organic thickeners, in particular anionic, cationic, nonionic and amphoteric polymeric associative thickeners; antioxidants; penetrants; sequestering agents; perfumes ; dispersants; film-forming agents; ceramides; preservatives; opacifying agents. The adjuvants above are generally present in an amount for each of them ranging from 0.01% to 20% by weight relative to the weight of the composition. The composition may in particular comprise one or more inorganic thickening agents chosen from organophilic clays, fumed silicas, or mixtures thereof.

The organophilic clay may be selected from montmorillonite, bentonite, hectorite, attapulgite, sepiolite, and mixtures thereof. The clay is preferably a bentonite or a hectorite. These clays can be modified with a chemical compound chosen from quaternary amines, tertiary amines, amino acetates, imidazolines, amine soaps, fatty sulphates, alkyl aryl sulphonates, amine oxides, and mixtures thereof. As organophilic clays, mention may be made of quaternium-18 bentonites such as those sold under the names Bentone 3, Bentone 38, Bentone 38V by Rheox, Tixogel VP by United catalyst, Claytone 34, Claytone 40, Claytone XL by Southern Clay Company; stearalkonium bentonites such as those sold under the names Bentone 27 by Rheox, Tixogel LG by United Catalyst, Claytone AF, Claytone APA by Southern Clay; quaternium-18 / benzalkonium bentonite such as those sold under the names Claytone HT, Claytone PS by Southern Clay. The fumed silicas can be obtained by high temperature hydrolysis of a volatile silicon compound in an oxyhydrogen flame, producing a finely divided silica. This process makes it possible in particular to obtain hydrophilic silicas which have a large number of silanol groups on their surface. Such hydrophilic silicas are, for example, sold under the names "AEROSIL 130®", "AEROSIL 200®", "AEROSIL 255®", "AEROSIL 300®", "AEROSIL 380®" by the company Degussa, "CAB-O- SIL HS-5® "," CAB-O-SIL EH-5® "," CAB-O-SIL LM-130® "," CAB-O-SIL MS-55® "," CAB-O-SIL M -5® "by the company Cabot. It is possible to chemically modify the surface of the silica by chemical reaction in order to reduce the number of silanol groups. In particular, it is possible to substitute silanol groups with hydrophobic groups: a hydrophobic silica is then obtained. The hydrophobic groups may be: trimethylsiloxyl groups, which are especially obtained by treatment of fumed silica in the presence of hexamethyldisilazane. Silicas thus treated are referred to as "Silica silylate" according to the CTFA (2nd edition, 1995). They are for example sold under the references "AEROSIL R812®" by the company Degussa, "CAB-O-SIL TS-530®" by Cabot. - Dimethylsilyloxyl or polydimethylsiloxane groups, which are obtained in particular by treatment of fumed silica in the presence of polydimethylsiloxane or dimethyldichlorosilane. Silicas thus treated are called "Silica dimethyl silylate" according to the CTFA (heme edition, 1995). They are for example sold under the references "AEROSIL R972®", "AEROSIL R974®" by the company Degussa, "CAB-O-SIL TS-610®", "CAB-O-SIL TS-720®" by the company Pooch. The fumed silica preferably has a particle size that may be nanometric to micrometric, for example ranging from about 5 to 200 nm. When present, the mineral thickening agent represents from 1 to 30% by weight relative to the weight of the composition. The composition may also include one or more organic thickeners. These thickening agents may be chosen from fatty acid amides (diethanol or coconut monoethanol amide, oxyethylenated alkyl ether carboxylic acid monoethanolamide), polymeric thickeners such as cellulosic thickeners (hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose), guar gum and its derivatives (hydroxypropylguar), gums of microbial origin (xanthan gum, scleroglucan gum), crosslinked homopolymers of acrylic acid or acrylamidopropanesulfonic acid and associative polymers (polymers comprising hydrophilic zones, and hydrophobic fatty-chain regions (alkyl, alkenyl comprising at least 10 carbon atoms) capable, in an aqueous medium, to associate reversibly with each other or with other molecules). According to one particular embodiment, the organic thickener is chosen from cellulose thickeners (hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose), guar gum and its derivatives (hydroxypropylguar), gums of microbial origin (xanthan gum, gum scleroglucan), the crosslinked homopolymers of acrylic acid or acrylamidopropanesulfonic acid, and preferably from cellulose thickeners with in particular hydroxyethylcellulose. The content of organic thickening agent (s), if present, usually ranges from 0.01% to 20% by weight, based on the weight of the composition, preferably from 0.1 to 5% by weight. The composition of the invention may be in various forms, for example a solution, an emulsion (milk or cream) or a gel, preferably in the form of an emulsion and particularly a direct emulsion. Preferably, the lightening composition according to the invention comprises: (a) one or more organic bases having a molecular weight of less than or equal to 300 g.mol -1, chosen from alkanolamines, in particular monoethanolamine, (b) a or more than one inorganic base selected from inorganic bases having one or more elements of columns 1 and 2 periodic table of elements other than hydrogen, in particular alkali carbonates or bicarbonates, (c) one or more organic or inorganic acids in a content greater than or equal to 0.2% by weight relative to the total weight of the dye composition, and (d) one or more oxidizing agents; (e) one or more fatty substances chosen from non-silicone oils. the pH of said composition being greater than or equal to 7. More preferably, the lightening composition according to the invention comprises: (a) one or more organic bases having a molecular weight of less than or equal to 300 g.mo1-1 chosen from alkanolamines, in particular monoethanolamine, (b) one or more inorganic bases selected from inorganic bases having one or more elements of columns 1 and 2 periodic table of elements other than hydrogen, in particular alkaline carbonates or bicarbonates, ( c) one or more organic or inorganic acids in a content greater than or equal to 0.2% by weight relative to the total weight of the dye composition, and (d) one or more oxidizing agents; (e) one or more fatty substances chosen from non-silicone oils present in a content ranging from 15 to 80% by weight, preferably from 25 to 75% by weight, better still from 30 to 70% by weight, and even more advantageously from 30 to 60% by weight, based on the weight of the composition; Preferably, according to this embodiment, the pH of the composition varies from 7 to 9.5, and more preferably from 8 to 9.

Methods of the invention The lightening process according to the invention comprises applying the composition comprising at least ingredients a) to d) or a) to e) as defined above on dry or moist keratin fibers. The composition is left in place on the fibers for a time, generally from 1 minute to 1 hour, preferably from 5 minutes to 30 minutes. The temperature during the lightening process is conventionally between room temperature (between 15 and 25 ° C) and 80 ° C, preferably between room temperature and 60 ° C. At the end of the treatment, the human keratin fibers are optionally rinsed with water, optionally washed with a shampoo followed by rinsing with water, before being dried or allowed to dry.

The composition according to the invention is preferably prepared by mixing at least two compositions. In a first variant of the invention, the composition according to the invention comprising at least the ingredients (a) to (d) or a) to e) as defined above, is derived from the mixture of two compositions: a composition ( A) comprising (c) one or more organic or inorganic acids and (d) one or more oxidizing agents, and - a composition (B) comprising (a) one or more organic bases or their salts having a molecular weight less than or equal to 300 g.mol-1 as defined above, and (b) one or more inorganic bases as defined above, so that the content of organic or inorganic acids (c) of the composition according to the invention resulting from the mixing of compositions (A) + (B) is greater than or equal to 0.2% by weight relative to the total weight of the composition and that the pH of the composition according to the invention resulting from the mixture of compositions (A) + (B) is greater than or equal to 7.

Preferably, at least one of the compositions (A) or (B) is aqueous. Even more preferentially, the two compositions (A) and (B) are aqueous. By "aqueous composition" is meant a composition comprising at least 5% water. Preferably, an aqueous composition comprises more than 10% by weight of water, and still more preferably more than 20% by weight of water. Preferably, the composition (A) is aqueous. Preferably, the composition (A) comprises at least 10% by weight of fatty substances and even more preferably at least 10% by weight of non-silicone fatty substances that are liquid at room temperature (25 ° C.). More preferably, the composition (A) comprises at least 20% by weight of fatty substances and even more preferably at least 20% by weight of non-silicone fatty substances that are liquid at room temperature (25 ° C.). Even better, the composition (A) comprises at least 30% by weight of fatty substances and even more preferably at least 30% by weight of non-silicone fatty substances that are liquid at room temperature (25 ° C.).

Preferably, the composition (A) is an emulsion, direct or inverse and preferably direct (O / W). More preferably, the composition (A) comprises at least 10% by weight of fatty substances, in particular 10% by weight of non-silicone fatty substances that are liquid at room temperature (25 ° C.) and the composition (B) comprises at least 10 % by weight of fatty substances, in particular non-silicone fatty substances that are liquid at room temperature (25 ° C.). More preferably, the composition (A) comprises at least 20% by weight of fatty substances, in particular 10% by weight of non-silicone fatty substances that are liquid at room temperature (25 ° C.) and the composition (B) comprises at least 20% by weight of fatty substances, in particular non-silicone fatty substances that are liquid at room temperature (25 ° C.). Even better, the composition (A) comprises at least 30% by weight of fatty substances, in particular 10% by weight of non-silicone fatty substances which are liquid at room temperature (25 ° C.) and the composition (B) comprises at least 30 % by weight of fatty substances, in particular non-silicone fatty substances that are liquid at room temperature (25 ° C.). The compositions (A) and (B) are preferably mixed in a weight ratio (A) / (B) of from 0.2 to 0.5 to 2. According to this embodiment, the dyeing process therefore consists in applying to the keratin fibers the dyeing composition resulting from the mixture of the compositions (A) and (B) mentioned above.

In a second variant of the invention, the composition according to the invention comprising at least the ingredients (a) to (d) or a) to e) as defined above, is derived from the mixture of three compositions: a composition ( A) comprising (c) one or more organic or inorganic acids and (d) one or more oxidizing agents, and - a composition (B) comprising (a) one or more organic bases or their salts having a molecular weight less than or equal to 300 g.mo1-1 as defined above, and (b) one or more mineral bases as defined above and - a composition (C) comprising one or more oils as defined above. so that the content of organic or inorganic acids (c) of the composition according to the invention resulting from the mixture of the compositions (A) + (B) + (C) is greater than or equal to 0.2% by weight relative to to the total weight of the composition and that the pH of the composition according to the invention resulting from the mixture of compositions (A) + (B) + (C) is greater than or equal to 7.

Device Finally, the invention relates to a multi-compartment device comprising a first compartment containing the composition (A) as described above and at least a second compartment containing the composition (B) as described above, and optionally a third compartment containing the composition (C) as described above, the compositions of the compartments being intended to be mixed before application, to give the formulation after mixing according to the invention, provided that the content of organic or inorganic acid is greater than or equal to at 0.2% by weight relative to the weight of the formulation resulting from the mixture of (A) + (B) or (A) + (B) + (C) and that the pH of the formulation resulting from the mixture of (A) ) + (B) or (A) + (B) + (C) is greater than or equal to 7.

The following examples serve to illustrate the invention without being limiting in nature. In these examples, the color of the locks was evaluated in the CIE L * a * b * system using a Minolta Spectrophotometer CM2600D colorimeter.

In this system L * a * b *, the three parameters denote respectively the intensity of the color (L *), a * indicates the green / red color axis and b * the blue / yellow color axis. The higher the value of L *, the lighter the color. The higher the value of a *, the more red the color, the higher the value of b *, the more yellow the color.

The variation or importance of lightening between untreated natural white (BN) hair locks and post-treatment hair locks is defined by the DE * parameter and is calculated according to the following equation: DE * = V (L * Lo *) 2 + (a * - ao *) 2 + (b * - bo *) 2 (i) In this equation, the parameters L *, a * and b * represent the values measured on the wicks of white hair after lightening and the parameters Lo *, ao * and bo * represent the values measured on the locks of untreated white hair. The higher the value of AEab *, the better the lightening of keratin fibers.

EXAMPLES I. Compositions On the one hand, the oxidizing compositions Al, A2 and A3 and, on the other hand, the compositions B1 and B2 in which the quantities are expressed as a percentage by weight are prepared. Composition Composition Composition Al A2 A3 Hydrogen peroxide 12 12 12 in aqueous solution in solution at 50% by weight Phosphoric acid 0.1 4 Etridonic acid, 0.2 0.2 0.2 tetrasodium salt in aqueous solution at 30% Pyrophosphate 0.04 0.04 0.04 Tetrasodium, 10 H2O Citric Acid 3 3 Sodium Salicylate 0.035 0.035 0.035 Vaseline Oil 50 50 50 Copolymer 2 2 2 Acrylamide / Sodium Acrylamido-2-methyl Propane Sulfonate Vitamin E: DL-0 , 1 0.1 0.1 Alpha-tocopherol Water Qs 100 Qs 100 Qs 100 10 38 Composition Composition B1 B2 Monoethanolamine 4 4 Alkyl (C8-Cio 50/50) 2 2 polyglucoside in aqueous solution at 60% by weight Vaseline oil 60 60 Sodium bicarbonate 10 Xanthan gum 1 1 Water Qs 100 Qs 100 II. Procedure At the time of use, one mixes: by weight of by weight of by weight of by weight of - 1 part the composition - 1 part the composition 10 - 1 part the composition - 1 part the composition - 1 part 15 the composition by weight of the composition (A1) and 1 part (B1) (invention) (pH of the mixture = 8.3) by weight of the composition (A1) and 1 part (B2) (comparative) (pH of the mixture = 9.2) by weight of the composition (A2) and 1 part (B1) (comparative) (pH of the mixture = 9.2) by weight of the composition (A2) and 1 part (B2) (comparative) ( pH of the mixture = 10.1) by weight of the composition (A3) and 1 part (B1) (comparative) (pH of the mixture = 5). Each mixture is applied to a lock of natural brown pigmented hair (HT4). The "mixing / wicking" bath ratio is 10/1 (g / g), respectively. The exposure time is 30 minutes on a hot plate set at 27 ° C. At the end of this time, the locks are rinsed and then washed with iN0A POST shampoo (pH = 5.3 ± 0.3). Finally, the locks are dried under a helmet at 40 ° C.

The color of the locks was evaluated in the CIE L * a * b * system using a Minolta Spectrophotometer CM2600D colorimeter.

III. Results The results on the locks of Caucasian pigmented brown hair (HT4) are given in the following table: Reference Hair Colored hair Colored hair Hair Hair HT4 colored with Al + B2 (Comp) with A2 + B1 (Comp) Colored colored with with with Al + B1 A2 + B2 A3 + B1 (Inv) (Comp) (Comp) L * 24.3 37.5 28.76 30.61 30.91 25.82 a * 2.9 8.9 7.27 8.75 8.72 4.09 b * 3.7 17.1 9.72 12.55 12.91 5.2 DE * 19.6 8.6 12.3 12.7 2.4 Standard Deviation 0.9 0, 7 0.8 1.2 0.6 It is found that the lightening obtained with the Al + B1 mixture according to the invention is more important.

A similar result would be obtained by replacing in the composition Al citric acid with phosphoric acid in order ultimately to obtain the same mixing pH (8.3).

Claims (22)

REVENDICATIONS1. A lightening composition for keratinous fibers, in particular human keratinous fibers such as the hair, comprising: (a) one or more organic bases or their salts, which compounds have a molecular weight less than or equal to 300 g.mo1-1, (b) one or more inorganic bases, (c) one or more organic or inorganic acids in a content greater than or equal to 0.2% by weight relative to the total weight of the dye composition, and (d) one or more agents. oxidants; the pH of the composition being greater than or equal to 7. 2. Composition according to claim 1, characterized in that the organic bases are chosen from amines, and preferably from organic amines whose pKb at 25 ° C is less than 12, and preferably less than 10, more advantageously less than 6. 3. Composition according to claim 1 or 2, characterized in that the organic base comprises a primary, secondary or tertiary amine function, and one or more linear or branched C 1 -C 8 alkyl groups carrying one or more hydroxyl radicals. . 4. Composition according to any one of claims 1 to 3, characterized in that the organic bases are chosen from: - alkanolamines such as mono-, di- or trialkanolamines, comprising one to three identical hydroxyalkyl radicals or no, at C1-C4, organic bases of the following formula: ## STR2 ## in which W is a C1-C6 alkylene radical optionally substituted with a hydroxyl group or a C1-C6 alkyl radical; Rx, Ry, Rz and Rt, which may be identical or different, represent a hydrogen atom, a C1-C6 alkyl or C1-C6 hydroxyalkyl radical or a C1-C6 aminoalkyl radical; amino acids; heterocyclic organic amines; amino acid dipeptides; compounds having a guanidine function. 5. Composition according to any one of claims 1 to 4, characterized in that the mineral bases are chosen from ammonia or any compound having in its structure one or more elements of columns 1 to 13 of the periodic table of elements other than hydrogen. 6. Composition according to any one of claims 1 to 5, characterized in that the mineral bases have the following structure (T): (Z1x). (Z2Y +). (T) wherein: Z2 denotes a metal of columns 1 to 13 of the periodic table of elements, preferably 1 or 2, such as sodium or potassium; Z1 'denotes an anion chosen from the ions CO32-, OH-, HC032-, SiO32-, HP042- PO43-, B4072-, preferably from the ions CO32-, OH-, SiO32-; x is 1, 2 or 3; y is 1, 2, 3 or 4; m and n are independently of one another 1, 2, 3 or 4; with n.y = m.x. 7. Composition according to any one of claims 1 to 6 characterized in that the inorganic bases are selected from sodium carbonate, potassium carbonate, sodium bicarbonate, sodium hydroxide, potassium hydroxide, sodium metasilicate, potassium metasilicate. 8. Composition according to any one of the preceding claims, characterized in that the acids are chosen from organic acids. 9. Composition according to any one of the preceding claims, characterized in that the organic acids are selected from carboxylic acids, in particular propanoic acid, butanoic acid, acetic acid, lactic acid, citric acid, maleic acid, glycolic acid, salicylic acid, malic acid, tartaric acid and mixtures thereof. 10. Composition according to one of claims 1 to 7, characterized in that the acids are selected from inorganic acids. 11. Composition according to one of claims 1 to 7 and 10, characterized in that the inorganic acids are chosen from hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid and in particular from acids hydrochloric or phosphoric acid. 12. Composition according to one of claims 1 to 7, 10 and 11, characterized in that the inorganic acid is phosphoric acid. 13. Composition according to any one of the preceding claims, characterized in that the acid or acids represent from 0.2 to 10% by weight, preferably from 0.2 to 2% by weight, and more preferably from 0.2. at 1% by weight, relative to the total weight of the composition. 14. Composition according to any one of the preceding claims, characterized in that the oxidizing agents are chosen from hydrogen peroxide, urea peroxide, alkali metal bromates or ferricyanides, peroxygenated salts such as persulfates, perborates, peracids and their precursors and alkali or alkaline earth metal percarbonates. 15. Composition according to any one of the preceding claims, characterized in that the oxidizing agent is hydrogen peroxide optionally combined with one or more peroxygenated salts. 16. Composition according to any one of the preceding claims, characterized in that the pH varies from 7 to 9.5, more preferably from 8 to 9. 17. Composition according to any one of the preceding claims, characterized in that it further comprises one or more fatty substances, preferably oils and even more preferably non-silicone oils. 18. Composition according to any one of the preceding claims, characterized in that it comprises one or more fatty substances chosen from liquid petroleum jelly, polydecenes, liquid fatty alcohols, esters of fatty acids and / or liquid fatty alcohols, or mixtures thereof, and more preferably liquid petroleum jelly and octyldodecanol. 19. Composition according to claims 17 and 18, characterized in that the fatty substance or fats, preferably non-silicones are present in a content ranging from 10 to 80% by weight, more preferably from 15 to 80% by weight, preferably from 25 to 75% by weight, more preferably from 30 to 70% by weight, still more preferably from 30 to 60% by weight, relative to the weight of the composition. 20. A process for lightening keratinous fibers, in particular human keratinous fibers such as the hair, in which the composition as defined according to any one of claims 1 to 19 is applied to said fibers. 21. Lightening process according to claim 20, characterized in that the composition as defined according to any one of claims 1 to 19 is derived from the mixture of at least two compositions, and in particular of two compositions: composition (A) comprising (c) one or more organic or inorganic acids as defined in claims 1, 8 to 13 and d) one or more oxidizing agents as defined in claims 1, 14 and 15, and - a composition (B) comprising (a) one or more organic bases or their salts, which compounds have a molecular weight less than or equal to 300 g.mo1-1 as defined in claims 1, 2, 3 and 4, and (c) one or more inorganic bases as defined according to claims 1 and 5 to 7, such that the content of organic or inorganic acids (d) of the composition resulting from the mixture of the compositions (A) + (B) is greater than or equal to at 0.2% by weight relative to the total weight of the composition and that the pH of the composition resulting from the mixture of compositions (A) + (B) is greater than or equal to 7. 22. A multi-compartment device comprising a first compartment containing the composition (A) as defined in claim 21 and at least a second compartment containing the composition (B) as defined in claim 21, the compartment compositions being intended for to be mixed before application, to give the formulation after mixing, provided that the organic or inorganic acid content is greater than or equal to 0.2% by weight relative to the weight of the formulation resulting from the mixture of (A) + ( B) and that the pH of the formulation resulting from the mixture of (A) + (B) is greater than or equal to 7.