Method for lightening keratin fibers

Abstract

The present invention relates to a method for lightening keratinous fibers, comprising applying to the keratinous fibers a composition comprising at least one chemical oxidizing agent, at least one bicarbonate, and at least one silicate.

Description

Technical Field

[0001] The present invention relates to a method for lightening keratin fibers, which comprises applying to the keratin fibers a composition comprising at least one chemical oxidizing agent, at least one bicarbonate, and at least one silicate.

Background Art

[0002] When it is desired to change the color of the hair, particularly when it is desired to make the color lighter than the original color, it is often necessary to first lighten or decolorize the hair. For this purpose, products for lightening or decolorizing are used.

[0003] The lightening of hair is evaluated by a "tone gradation" that characterizes the degree or extent of lightening. The concept of "tone" is based on classifying natural shades, and one tone separates the shade immediately before or after it. The definition and classification of these natural shades are well-known to hair styling experts and are published as a book (Non-Patent Document 1). The tone gradation is represented in the range of 1 (black) to 10 (very light blond), with one unit corresponding to one tone, and the larger the number, the lighter the shade.

[0004] In most cases, a method of lightening or decolorizing hair with a lightening or decolorizing composition containing at least one chemical oxidizing agent under alkaline pH conditions is known. The role of this oxidizing agent is to decompose the melanin in the hair, and as a result (although there are differences in degree depending on the nature of the oxidizing agent present and the pH conditions), the fiber is lightened. Therefore, when performing relatively gentle lightening, hydrogen peroxide is generally used as the oxidizing agent. When more lightening is desired, especially when the treated hair is dark, persulfate is usually used in the presence of hydrogen peroxide. However, the lightening obtained by the action of such a combination is not always satisfactory, and hair with a rather unappealing orange-yellow hue that is very different from the natural color is obtained, thereby complicating subsequent coloring because it is limited to obtaining warm color tones. Furthermore, persulfate-based lightening compositions can cause deterioration of the fiber quality.

[0005] Therefore, there is a real need to develop a method that enables effective lightening of keratin fibers, especially dark keratin fibers, with less yellowing and more natural results. In such a method, more attention should be paid to the quality of the fiber, and in particular, it is necessary to minimize fiber deterioration.

[0006] Surprisingly, the applicant has found that all of these objectives are achieved by the method according to the present invention.

Prior Art Documents

Non-Patent Documents

[0007]

Non-Patent Document 1

Summary of the Invention

Means for Solving the Problems

[0008] According to a first aspect, the subject of the present invention is a method for lightening keratin fibers, comprising: i) one or more chemical oxidizing agents selected from hydrogen peroxide, hydrogen peroxide generating systems other than hydrogen peroxide salts, and mixtures thereof; ii) one or more bicarbonates and / or one or more bicarbonate generating systems; iii) one or more silicates; wherein the method comprises applying to the keratin fibers a composition comprising: - the silicate is present in a total content in the range of 1% to 40% by weight, based on the total weight of the composition; - the composition contains persulfate in a total content of less than 5% by weight.

[0009] According to a second aspect, the subject of the present invention is the use of the composition as defined above for lightening keratin fibers, preferably for lightening keratin fibers while simultaneously reducing yellowness.

[0010] According to a third aspect, the subject of the present invention is a device (kit) comprising a plurality of compartments, comprising: · a first compartment containing a composition (A) comprising one or more chemical oxidizing agents selected from hydrogen peroxide, hydrogen peroxide generating systems other than hydrogen peroxide salts, and mixtures thereof; · a second compartment containing a composition (B) comprising: ii) one or more bicarbonates and / or one or more bicarbonate generating systems, iii) one or more silicates; and optionally iv) one or more carbonates and / or one or more carbonate generating systems. A device (kit) as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0011]

Figure 1

DETAILED DESCRIPTION OF THE INVENTION

[0012] Unless otherwise specified, the gist of the present invention is as follows: · The term "keratin fiber" means fibers derived from humans or animals such as hair, body hair, eyelashes, eyebrows, wool, angora goat hair, cashmere or fur. According to the present invention, the keratin fiber is preferably a human keratin fiber, more preferably hair, and even more preferably scalp hair. · The term "alkyl group" means a straight-chain or branched saturated hydrocarbon-based group. · The term "(C x ~C y ) alkyl group" means an alkyl group containing x to y carbon atoms. · The term "silicate" means silicate. · The term "coloring agent" means an oxidation dye, a direct dye or a pigment. · The term "oxidation dye" means an oxidation dye precursor selected from oxidizing bases and couplers. Oxidizing bases and couplers are colorless or lightly colored compounds that give colored chemical species through a condensation reaction in the presence of an oxidizing agent. · The term "direct dye" means natural and / or synthetic dyes other than oxidation dyes, including in the form of extracts. These are colored compounds that will spread on the surface of the fiber. These can be ionic or non-ionic, i.e., anionic, cationic, neutral, or non-ionic. · The term "chemical oxidizing agent" means an oxidizing agent other than atmospheric oxygen.

[0013] Unless otherwise specified, when referring to a compound in this application, this includes its optical isomers, its geometric isomers, its tautomers, its salts, or its solvates such as hydrates, and mixtures thereof.

[0014] "At least one" and "one or more" are synonymous and can be used interchangeably.

[0015] The terms "brightening" and "bleaching" are synonymous and can be used interchangeably.

[0016] Composition According to a first aspect, the subject matter of the present invention is a method for brightening keratin fibers as defined above.

[0017] The applicant has noted that, surprisingly, the method according to the present invention makes it possible to effectively brighten keratin fibers with less yellowing and a more natural result. When comparing the color of keratin fibers treated by the method according to the present invention with the color of keratin fibers treated by brightening methods known from the prior art, the CIE L * a * b * measured in the system, the value of b * is observed to be lower for the composition used in the method according to the present invention than for brightening compositions known from the prior art at an equivalent strength level L * .

[0018] Furthermore, the method according to the present invention pays more attention to the quality of the fibers and, in particular, it is necessary to minimize the deterioration of the fibers.

[0019] According to a preferred embodiment, the method according to the present invention: i) hydrogen peroxide and; ii) one or more bicarbonates and; iii) one or more silicates, including the application of a composition containing to keratin fibers, - the silicate is present in a total content in the range of 1% to 40% by mass based on the total mass of the composition; - A method wherein the composition contains persulfate with a total content of less than 5% by mass.

[0020] Chemical oxidizing agent The composition contains one or more chemical oxidizing agents selected from i) hydrogen peroxide, hydrogen peroxide generating systems other than peroxides, and mixtures thereof.

[0021] The hydrogen peroxide generating system other than peroxides can be selected from urea peroxide, polymer complexes capable of releasing hydrogen peroxide, oxidoreductases, and mixtures thereof.

[0022] Examples of polymer complexes capable of releasing hydrogen peroxide include, in particular, polyvinylpyrrolidone / H2O2 in powder form, and other polymer complexes described in U.S. Patent Nos. 5,008,093, 3,376,110, and 5,183,901.

[0023] The oxidoreductase can generate hydrogen peroxide in the presence of a suitable substance (e.g., glucose in the case of glucose oxidase, or uric acid in the case of uricase).

[0024] According to a particular embodiment, hydrogen peroxide and / or a hydrogen peroxide generating system other than peroxides can be added immediately before applying the composition to the keratin fibers. The intermediate composition containing hydrogen peroxide and / or a hydrogen peroxide generating system other than peroxides can be referred to as an oxidizing composition and can also contain various additional compounds or various adjuvants conventionally used in compositions for lightening keratin fibers.

[0025] According to a preferred embodiment, the composition contains hydrogen peroxide as the chemical oxidizing agent.

[0026] The chemical oxidizing agent is preferably present in a total content in the range of 1% to 12% by mass, more preferably in the range of 3% to 9% by mass, and even more preferably in the range of 3.5% to 8.5% by mass, based on the total mass of the composition.

[0027] According to a preferred embodiment, hydrogen peroxide is present in a total content in the range of 1% to 12% by mass, preferably in the range of 3% to 9% by mass, more preferably in the range of 3.5% to 8.5% by mass, based on the total mass of the composition.

[0028] Bicarbonate and / or bicarbonate generating system The composition also contains ii) one or more bicarbonates and / or one or more bicarbonate generating systems, preferably ii) one or more bicarbonates.

[0029] The term "bicarbonate generating system" means, for example, a system in which carbon dioxide in water or a carbonate is buffered with a mineral acid or an organic acid to generate bicarbonate in situ.

[0030] Preferably, the bicarbonate is as follows: - Alkali metal bicarbonate; - Alkaline earth metal bicarbonate; - Formula N + R 1 R 2 R 3 R 4 ,HCO3 - (wherein R 1 , R 2 , R 3 , and R 4 each independently represent a hydrogen atom or a (C1-C4) alkyl group optionally substituted with a hydroxyl group); - Aminoguanidine bicarbonate; - Selected from mixtures thereof.

[0031] More preferably, the bicarbonate is selected from sodium bicarbonate, potassium bicarbonate, lithium bicarbonate, cesium bicarbonate, calcium bicarbonate, magnesium bicarbonate, ammonium bicarbonate, choline bicarbonate, triethylammonium bicarbonate, aminoguanidine bicarbonate, and mixtures thereof.

[0032] Even more preferably, the bicarbonate is selected from sodium bicarbonate, potassium bicarbonate, cesium bicarbonate, calcium bicarbonate, magnesium bicarbonate, ammonium bicarbonate, and mixtures thereof.

[0033] Most preferably, the bicarbonate is selected from sodium bicarbonate, potassium bicarbonate, ammonium bicarbonate, and mixtures thereof.

[0034] According to a particularly preferred embodiment, the bicarbonate comprised in the composition is ammonium bicarbonate.

[0035] The bicarbonate may be derived from natural water, such as spring water from the Vichy basin, or La Roche Posay or Badoit water.

[0036] The bicarbonate and / or the bicarbonate generating system is preferably present in a total content in the range of 0.01% to 20% by mass, more preferably in the range of 1% to 15% by mass, even more preferably in the range of 2% to 15% by mass, and most preferably in the range of 4% to 15% by mass, based on the total mass of the composition.

[0037] According to a preferred embodiment, the bicarbonate is present in a total content in the range of 0.01% to 20% by mass, preferably in the range of 1% to 15% by mass, more preferably in the range of 2% to 15% by mass, and even better in the range of 4% to 15% by mass, based on the total mass of the composition.

[0038] Silicate The composition also comprises iii) one or more silicates.

[0039] The silicate is preferably water-soluble.

[0040] The term "water-soluble silicate" means a silicate having a solubility of more than 0.5% by mass, preferably more than 1% by mass, in water at normal room temperature (25 °C) and atmospheric pressure (760 mmHg).

[0041] Preferably, the silicate is selected from alkali metal silicates, alkaline earth metal silicates, aluminum silicates, trimethylammonium silicates, and mixtures thereof.

[0042] More preferably, the silicate is selected from sodium silicate, potassium silicate, calcium silicate, aluminum silicate, trimethylammonium silicate, and mixtures thereof.

[0043] Even more preferably, the silicate is selected from sodium silicate. Examples of sodium silicate that may be mentioned include compounds having CAS numbers: [1344-09-8] and [6834-92-0].

[0044] The silicate is preferably present in a total content in the range of 2% to 35% by mass, preferably in the range of 3% to 35% by mass, more preferably in the range of 4% to 20% by mass, based on the total mass of the composition.

[0045] The mass ratio of the total amount of bicarbonate and / or the bicarbonate generating system ii) / the total amount of silicate iii) is preferably 0.00025 to 20, more preferably 0.02 to 7.5, even more preferably 0.05 to 5.

[0046] According to a preferred embodiment, the mass ratio of the total amount of bicarbonate ii) / the total amount of silicate iii) is 0.00025 to 20, preferably 0.02 to 7.5, more preferably 0.05 to 5.

[0047] The mass ratio of the total amount of bicarbonate and / or bicarbonate generating system ii) / the total amount of chemical oxidant i) is preferably 0.0008 to 20, more preferably 0.11 to 5, and even more preferably 0.2 to 4.2.

[0048] According to a preferred embodiment, the mass ratio of the total amount of bicarbonate ii) / the total amount of chemical oxidant i) is 0.0008 to 20, preferably 0.11 to 5, more preferably 0.2 to 4.2.

[0049] According to a more preferred embodiment, the mass ratio of the total amount of bicarbonate ii) / the total amount of hydrogen peroxide is 0.0008 to 20, preferably 0.11 to 5, more preferably 0.2 to 4.2.

[0050] Carbonate and / or carbonate generating system The composition may also contain iv) one or more carbonates and / or one or more carbonate generating systems, preferably iv) one or more carbonates.

[0051] The term "carbonate generating system" means a system in which carbonate is generated in situ, such as carbon dioxide in water or percarbonate in water.

[0052] Preferably, the carbonate is: - Alkali metal carbonate; - Alkaline earth metal carbonate; - Lanthanide carbonate; - Transition metal carbonate; - Bismuth carbonate; - Cadmium carbonate; - Thallium carbonate; - Zinc carbonate; - Formula (N + R 1 R 2 R 3 R 4 )2,CO3 2- (wherein R 1 、R 2 、R 3 、and R 4 each independently represents a hydrogen atom or a (C1-C4) alkyl group optionally substituted with a hydroxyl group); - Guanidine carbonate; - Selected from mixtures thereof.

[0053] More preferably, the carbonate is selected from sodium carbonate, potassium carbonate, cesium carbonate, lithium carbonate, magnesium carbonate, calcium carbonate, barium carbonate, strontium carbonate, cerium carbonate, lanthanum carbonate, yttrium carbonate, copper (II) carbonate, manganese carbonate, nickel carbonate, silver carbonate, zirconium carbonate, bismuth carbonate, cadmium carbonate, thallium carbonate, zinc carbonate, ammonium carbonate, guanidine carbonate, tetraethylammonium carbonate, and mixtures thereof.

[0054] Even more preferably, the carbonate is selected from sodium carbonate, potassium carbonate, cesium carbonate, magnesium carbonate, calcium carbonate, cerium carbonate, manganese carbonate, zinc carbonate, ammonium carbonate, guanidine carbonate, and mixtures thereof.

[0055] Most preferably, the carbonate is selected from sodium carbonate, potassium carbonate, magnesium carbonate, calcium carbonate, ammonium carbonate, and mixtures thereof.

[0056] According to a particularly preferred embodiment, the carbonate contained in the composition is ammonium carbonate.

[0057] The carbonate and / or carbonate generating system is preferably present in a total content in the range of 0.01% to 20% by mass, more preferably in the range of 1% to 15% by mass, still more preferably in the range of 2% to 15% by mass, and most preferably in the range of 4% to 15% by mass, based on the total mass of the composition.

[0058] According to a preferred embodiment, the carbonate is present in a total content in the range of 0.01% to 20% by mass, preferably in the range of 1% to 15% by mass, more preferably in the range of 2% to 15% by mass, and still more preferably in the range of 4% to 15% by mass, based on the total mass of the composition.

[0059] The mass ratio of the total amount of the carbonate and / or carbonate generating system iv) to the total amount of the bicarbonate and / or bicarbonate generating system ii) is preferably 0.0005 to 2000, more preferably 0.06 to 15, and still more preferably 0.1 to 7.5.

[0060] According to a preferred embodiment, the mass ratio of the total amount of the carbonate iv) to the total amount of the bicarbonate ii) is 0.0005 to 2000, preferably 0.06 to 15, and more preferably 0.1 to 7.5.

[0061] The composition preferably contains magnesium carbonate in a total content of less than 5% by mass, more preferably less than 1% by mass, still more preferably less than 0.1% by mass, most preferably less than 0.01% by mass, and even better less than 0.001% by mass.

[0062] According to a particularly preferred embodiment, the composition does not contain magnesium carbonate.

[0063] The composition contains persulfate with a total content of less than 5% by mass, preferably less than 1% by mass, more preferably less than 0.1% by mass, most preferably less than 0.01% by mass, and even better less than 0.001% by mass.

[0064] According to a particularly preferred embodiment, the composition does not contain persulfate.

[0065] The composition may contain one or more colorants selected from direct dyes, oxidative dyes, and mixtures thereof.

[0066] When a colorant is present, the colorant is preferably present in a total content in the range of 0.001% to 10% by mass, preferably in the range of 0.01% to 4% by mass, more preferably in the range of 0.1% to 1% by mass, based on the total mass of the composition.

[0067] Oxidative dye Oxidative dyes are generally selected from one or more oxidizing bases optionally combined with one or more coupling agents (also known as couplers).

[0068] Oxidizing base The composition may optionally and preferably contain one or more oxidizing bases selected from those conventionally used for dyeing keratin fibers.

[0069] By way of example, the oxidizing base is selected from para-phenylenediamine, bis(phenyl)alkylenediamine, para-aminophenol, ortho-aminophenol and heterocyclic bases and corresponding addition salts.

[0070] Examples of para-phenylenediamines that may be mentioned include para-phenylenediamine, para-toluidine, 2-chloro-para-phenylenediamine, 2,3-dimethyl-para-phenylenediamine, 2,6-dimethyl-para-phenylenediamine, 2,6-diethyl-para-phenylenediamine, 2,5-dimethyl-para-phenylenediamine, N,N-dimethyl-para-phenylenediamine, N,N-diethyl-para-phenylenediamine, N,N-dipropyl-para-phenylenediamine, 4-amino-N,N-diethyl-3-methylaniline, N,N-bis(β-hydroxyethyl)-para-phenylenediamine, 4-N,N-bis(β-hydroxyethyl)amino-2-methylaniline, 4-N,N-bis(β-hydroxyethyl)amino-2-chloroaniline, 2-β-hydroxyethyl-para-phenylenediamine, 2-methoxymethyl-para-phenylenediamine, 2-fluoro-para-phenylenediamine, 2-isopropyl-para-phenylenediamine, N-(β-hydroxypropyl)-para-phenylenediamine, 2-hydroxymethyl-para-phenylenediamine, N,N-dimethyl-3-methyl-para-phenylenediamine, N-ethyl-N-(β-hydroxyethyl)-para-phenylenediamine, N-(β,γ-dihydroxypropyl)-para-phenylenediamine, N-(4'-aminophenyl)-para-phenylenediamine, N-phenyl-para-phenylenediamine, 2-β-hydroxyethyloxy-para-phenylenediamine, 2-β-acetylaminoethyloxy-para-phenylenediamine, N-(β-methoxyethyl)-para-phenylenediamine, 4-aminophenylpyrrolidine, 2-thienyl-para-phenylenediamine, 2-β-hydroxyethylamino-5-aminotoluene, and 3-hydroxy-1-(4'-aminophenyl)pyrrolidine, and the corresponding addition salts with acids.

[0071] Among the para-phenylenediamines described above, in particular, para-phenylenediamine, para-tolylenediamine, 2-isopropyl-para-phenylenediamine, 2-β-hydroxyethyl-para-phenylenediamine, 2-β-hydroxyethyloxy-para-phenylenediamine, 2,6-dimethyl-para-phenylenediamine, 2,6-diethyl-para-phenylenediamine, 2,3-dimethyl-para-phenylenediamine, N,N-bis(β-hydroxyethyl)-para-phenylenediamine, 2-chloro-para-phenylenediamine, and 2-β-acetylaminoethyloxy-para-phenylenediamine, as well as the corresponding addition salts with acids are preferred.

[0072] Examples of bis(phenyl)alkylenediamines that may be mentioned include, for example, N,N'-bis(β-hydroxyethyl)-N,N'-bis(4'-aminophenyl)-1,3-diaminopropanol, N,N'-bis(β-hydroxyethyl)-N,N'-bis(4'-aminophenyl)ethylenediamine, N,N'-bis(4-aminophenyl)tetramethylenediamine, N,N'-bis(β-hydroxyethyl)-N,N'-bis(4-aminophenyl)tetramethylenediamine, N,N'-bis(4-methylaminophenyl)tetramethylenediamine, N,N'-bis(ethyl)-N,N'-bis(4'-amino-3'-methylphenyl)ethylenediamine, and 1,8-bis(2,5-diaminophenoxy)-3,6-dioxaoctane, as well as the corresponding addition salts.

[0073] Examples of para-aminophenols that may be mentioned include, for example, para-aminophenol, 4-amino-3-methylphenol, 4-amino-3-fluorophenol, 4-amino-3-chlorophenol, 4-amino-3-hydroxymethylphenol, 4-amino-2-methylphenol, 4-amino-2-hydroxymethylphenol, 4-amino-2-methoxymethylphenol, 4-amino-2-aminomethylphenol, 4-amino-2-(β-hydroxyethylaminomethyl)phenol, and 4-amino-2-fluorophenol, as well as the corresponding addition salts with acids.

[0074] Examples of ortho-aminophenols that may be mentioned include, for example, 2-aminophenol, 2-amino-5-methylphenol, 2-amino-6-methylphenol and 5-acetamido-2-aminophenol, and the corresponding addition salts.

[0075] Examples of heterocyclic bases that may be mentioned include, for example, pyridine, pyrimidine, and pyrazole derivatives.

[0076] Examples of pyridine derivatives that may be mentioned include, for example, the compounds described in British Patent No. 1026978 and British Patent No. 1153196, such as 2,5-diaminopyridine, 2-(4-methoxyphenyl)amino-3-aminopyridine and 3,4-diaminopyridine, and the corresponding addition salts.

[0077] Other pyridine oxidizing bases useful in the present invention are, for example, the oxidizing base described in French Patent Application Publication No. 2801308, 3-aminopyrazolo[1,5-a]pyridine or the corresponding addition salts. Examples that may be mentioned include pyrazolo[1,5-a]pyrid-3-ylamine, 2-acetylaminopyrazolo[1,5-a]pyrid-3-ylamine, 2-(morpholin-4-yl)pyrazolo[1,5-a]pyrid-3-ylamine, 3-aminopyrazolo[1,5-a]pyridine-2-carboxylic acid, 2-methoxypyrazolo[1,5-a]pyrid-3-ylamine, (3-aminopyrazolo[1,5-a]pyrid-7-yl)methanol, 2-(3-aminopyrazolo[1,5-a]pyrid-5-yl)ethanol, 2-(3-aminopyrazolo[1,5-a]pyrid-7-yl)ethanol, (3-aminopyrazolo[1,5-a]pyrid-2-yl)methanol, 3,6-diaminopyrazolo[1,5-a]pyridine, 3,4-diaminopyrazolo[1,5-a]pyridine, pyrazolo[1,5-a]pyridine-3,7-diamine, 7-(morpholin-4-yl)pyrazolo[1,5-a]pyrid-3-ylamine, pyrazolo[1,5-a]pyridine-3,5-diamine, 5-(morpholin-4-yl)pyrazolo[1,5-a]pyrid-3-ylamine, 2-[(3-aminopyrazolo[1,5-a]pyrid-5-yl)(2-hydroxyethyl)amino]ethanol, 2-[(3-aminopyrazolo[1,5-a]pyrid-7-yl)(2-hydroxyethyl)amino]ethanol, 3-aminopyrazolo[1,5-a]pyridine-5-ol, 3-aminopyrazolo[1,5-a]pyridine-4-ol, 3-aminopyrazolo[1,5-a]pyridine-6-ol, 3-aminopyrazolo[1,5-a]pyridine-7-ol, 2-β-hydroxyethoxy-3-aminopyrazolo[1,5-a]pyridine, and 2-(4-dimethylpiperazin-1-yl)-3-aminopyrazolo[1,5-a]pyridine, and the corresponding addition salts.

[0078] More specifically, the oxidizing base useful in the present invention is selected from 3-aminopyrazolo[1,5-a]pyridine, and preferably the carbon atom at the 2-position is: a) a (C1-C6) (alkyl) amino group (the alkyl group may be optionally substituted with at least one hydroxyl, amino, or imidazolium group); b) an optionally cationic 5- to 7-membered heterocycloalkyl group containing 1 to 3 heteroatoms, optionally substituted with one or more (C1-C6) alkyl groups, for example, a di (C1-C4) alkyl piperazinium group; or c) a (C1-C6) alkoxy group optionally substituted with one or more hydroxyl groups, for example, a β-hydroxyalkoxy group; Those substituted therewith and corresponding addition salts.

[0079] Examples of pyrimidine derivatives that may be mentioned include, for example, the compounds described in the patents German Patent No. 2359399, Japanese Patent Publication No. 88-169571, Japanese Unexamined Patent Application Publication No. 05-63124, and European Patent No. 0770375, or the pamphlet of International Publication No. 96 / 15765, a patent application, for example, 2,4,5,6-tetraaminopyrimidine, 4-hydroxy-2,5,6-triaminopyrimidine, 2-hydroxy-4,5,6-triaminopyrimidine, 2,4-dihydroxy-5,6-diaminopyrimidine, 2,5,6-triaminopyrimidine and its addition salts, and, when a tautomeric equilibrium exists, its tautomers.

[0080] Examples of pyrazole derivatives that may be mentioned include the compounds described in German Patent No. 3843892, German Patent No. 4133957, and International Patent Application Publication Pamphlets No. 94 / 08969, No. 94 / 08970, French Patent No. A-2733749, and German Patent No. 19543988, such as 4,5-diamino-1-methylpyrazole, 4,5-diamino-1-(β-hydroxyethyl)pyrazole, 3,4-diaminopyrazole, 4,5-diamino-1-(4'-chlorobenzyl)pyrazole, 4,5-diamino-1,3-dimethylpyrazole, 4,5-diamino-3-methyl-1-phenylpyrazole, 4,5-diamino-1-methyl-3-phenylpyrazole, 4-amino-1,3-dimethyl-5-hydrazinopyrazole, 1-benzyl-4,5-diamino-3-methylpyrazole, 4,5-diamino-3-tert-butyl-1-methylpyrazole, 4,5-diamino-1-tert-butyl-3-methylpyrazole, 4,5-diamino-1-(β-hydroxyethyl)-3-methylpyrazole, 4,5-diamino-1-ethyl-3-methylpyrazole, 4,5-diamino-1-ethyl-3-(4'-methoxyphenyl)pyrazole, 4,5-diamino-1-ethyl-3-hydroxymethylpyrazole, 4,5-diamino-3-hydroxymethyl-1-methylpyrazole, 4,5-diamino-3-hydroxymethyl-1-isopropylpyrazole, 4,5-diamino-3-methyl-1-isopropylpyrazole, 4-amino-5-(2'-aminoethyl)amino-1,3-dimethylpyrazole, 3,4,5-triaminopyrazole, 1-methyl-3,4,5-triaminopyrazole, 3,5-diamino-1-methyl-4-methylaminopyrazole, 3,5-diamino-4-(β-hydroxyethyl)amino-1-methylpyrazole, and the corresponding addition salts. 4,5-Diamino-1-(β-methoxyethyl)pyrazole can also be used.

[0081] Preferably, 4,5-diaminopyrazole is used, and more preferably, 4,5-diamino-1-(β-hydroxyethyl)pyrazole and / or the corresponding salt will be used.

[0082] Pyrazole derivatives that can be similarly mentioned include diaminopyrazolopyrazolone, in particular those described in the patent application FR-A-2886136, for example, the following compounds and corresponding addition salts: 2,3-diamino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one, 2-amino-3-ethylamino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one, 2-amino-3-isopropylamino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one, 2-amino-3-(pyrrolidin-1-yl)-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one, 4,5-diamino-1,2-dimethyl-1,2-dihydropyrazol-3-one, 4,5-diamino-1,2-diethyl-1,2-dihydropyrazol-3-one, 4,5-diamino-1,2-di(2-hydroxyethyl)-1,2-dihydropyrazol-3-one, 2-amino-3-(2-hydroxyethyl)amino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one, 2-amino-3-dimethylamino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one, 2,3-diamino-5,6,7,8-tetrahydro-1H,6H-pyridazino[1,2-a]pyrazol-1-one, 4-amino-1,2-diethyl-5-(pyrrolidin-1-yl)-1,2-dihydropyrazol-3-one, 4-amino-5-(3-dimethylaminopyrrolidin-1-yl)-1,2-diethyl-1,2-dihydropyrazol-3-one, and 2,3-diamino-6-hydroxy-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one.

[0083] Preferably, 2,3-diamino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one and / or the corresponding salt will be used.

[0084] As the heterocyclic base, it is preferable to use 4,5-diamino-1-(β-hydroxyethyl)pyrazole and / or 2,3-diamino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one and / or the corresponding salts.

[0085] Coupling agent The composition can optionally and preferably contain one or more coupling agents that can be selected from those conventionally used for dyeing keratin fibers.

[0086] In particular, among these coupling agents, mention may be made of meta-phenylenediamine, meta-aminophenol, meta-diphenol, naphthalene-based coupling agents and heterocyclic coupling agents and furthermore the corresponding addition salts.

[0087] For example, 1,3-dihydroxybenzene, 1,3-dihydroxy-2-methylbenzene, 4-chloro-1,3-dihydroxybenzene, 2,4-diamino-1-(β-hydroxyethyloxy)benzene, 2-amino-4-(β-hydroxyethylamino)-1-methoxybenzene, 1,3-diaminobenzene, 1,3-bis(2,4-diaminophenoxy)propane, 3-ureidoaniline, 3-ureido-1-dimethylaminobenzene, sesamol, 1-β-hydroxyethylamino-3,4-methylenedioxybenzene, α-naphthol, 2-methyl-1-naphthol, 6-hydroxyindole, 4-hydroxyindole, 4-hydroxy-N-methylindole, 2-amino-3-hydroxypyridine, 6-hydroxybenzomorpholine, 3,5-diamino-2,6-dimethoxypyridine, 1-N-(β-hydroxyethyl)amino-3,4-methylenedioxybenzene, 2,6-bis(β-hydroxyethylamino)toluene, 6-hydroxyindoline, 2,6-dihydroxy-4-methylpyridine, 1-H-3-methylpyrazol-5-one, 1-phenyl-3-methylpyrazol-5-one, 2,6-dimethylpyrazolo[1,5-b][1,2,4]triazole, 2,6-dimethyl[3,2-c][1,2,4]triazole, and 6-methylpyrazolo[1,5-a]benzimidazole, 2-methyl-5-aminophenol, 5-N-(β-hydroxyethyl)amino-2-methylphenol, 3-aminophenol, and 3-amino-2-chloro-6-methylphenol, corresponding addition salts with acids, and corresponding mixtures may be mentioned.

[0088] Generally, the addition salts of the oxidizing base and the coupling agent that can be used in connection with the present invention are particularly addition salts with acids, for example, selected from hydrochloride, bromate, sulfate, citrate, succinate, tartrate, lactate, tosylate, benzenesulfonate, phosphate, and acetate.

[0089] Advantageously, each of the oxidizing bases occupies 0.001% by mass to 10% by mass, preferably 0.005% by mass to 5% by mass, based on the total mass of the composition.

[0090] When a coupling agent is present, this preferably occupies 0.001% to 10% by mass, preferably 0.005% to 5% by mass, based on the total mass of the composition, respectively.

[0091] Direct dye The composition may also contain one or more direct dyes.

[0092] The direct dye can be a neutral, cationic, or anionic direct dye, preferably a neutral or cationic direct dye.

[0093] Direct dyes can be neutral, cationic, or anionic direct dyes selected from: acridine; acridone; anthranthrone; anthrapyrimidine; anthraquinone; azine; (poly)azo or azo, hydrazono or hydrazone, especially arylhydrazone; azomethine; benzanthrone; benzimidazole; benzimidazolone; benzindole; benzoxazole; benzopyran; benzothiazole; benzoquinone; bis - isoindoline; carboxyanilide; coumarin; cyanines such as (di)azacarbocyanine, (di)azahemicyanine, hemicyanine, or tetraazacarbocyanine; (di)azine; bis - azine; (di)oxazine; (di)thiazine; (di)phenylamine; (di)phenylmethane; (di)ketopyrrolopyrrole; flavonoids such as flavanthrone and flavone; fluorine - zine; formazan; indamine; indanthrone; indigoid, thioindigoid, and pseudoindigoid; indophenol; indoaniline; isoindoline; isoindolinone; isoviolanthrone; lactone; (poly)methine such as stilbene or stilryl - type dimethine; naphthalimide; naphthanilide; naphtharactam; naphthoquinone; nitro, especially nitro (hetero)aromatic; oxadiazole; oxazine; perilone; perinone; perylene; phenazine; phenoxazine; phenothiazine; phthalocyanine; polyene / carotenoid; porphyrin; pyranthrone; pyrazoloanthrone; pyrazolone; pyrimidoanthrone; pyronin; quinacridone; quinoline; quinophthalone; squalane; tetrazoline; thiazine; thiopyronin; triarylmethane; or xanthene; and natural direct dyes. Preferably, the direct dye is selected from anthraquinone, (poly)azo, azomethine, and stilbene, more preferably from anthraquinone.

[0094] Direct dyes can be selected especially from neutral, cationic, or anionic nitrobenzene direct dyes, neutral, cationic, or anionic azo direct dyes, neutral, cationic, or anionic tetraazapentamethine dyes, cationic or anionic quinone dyes, especially neutral, cationic, or anionic anthraquinone dyes, neutral, cationic, or anionic azine direct dyes, neutral, cationic, or anionic triarylmethane direct dyes, neutral, cationic, or anionic azomethine direct dyes, and natural direct dyes. Preferably, the direct dye is selected from neutral or anionic anthraquinone dyes and stilbene.

[0095] Examples of neutral, anionic or cationic direct dyes that can be used in the present invention include the following dyes: acridine; acridone; anthranthrone; anthrapyrimidine; anthraquinone; azine; (poly)azo; hydrazono or hydrazone, especially arylhydrazone; azomethine; benzanthrone; benzimidazole; benzimidazolone; benzindole; benzoxazole; benzopyran; benzothiazole; benzoquinone; bisazine; bis - isoindoline; carboxyanilide; coumarin; cyanine such as azacarbocyanine, diazacarbocyanine, diazahemicyanine, hemicyanine, or tetraazacarbocyanine; diazine; diketopyrrolopyrrole; dioxazine; diphenylamine; diphenylmethane; dithiaazine; flavonoids such as flavanthrone and flavone; fluorindine; formazan; indamine; indanthrone; indigoid and pseudoindigoid; indophenol; indoaniline; isoindoline; isoindolinone; isoviolanthrone; lactone; (poly)methine such as stilbene or styryl - type dimethine; naphthalimide; naphthanilide; naphtharactam; naphthoquinone; nitro, especially nitro (hetero)aromatic; oxadiazole; oxazine, perilone; perinone; perylene; phenazine; phenoxazine; phenothiazine; phthalocyanine; polyene / carotenoid; porphyrin; pyranthrone; pyrazoloanthrone; pyrazolone; pyrimidoanthrone; pyronin; quinacridone; quinoline; quinophthalone; squalane; tetrazole; thiazine; thioindigo; thiopyronin; triarylmethane; or xanthene.

[0096] Neutral direct dye The direct dye is preferably a neutral direct dye selected from the following hydrazono dyes of formulas (IIIa) and (III’a), azo and styryl dyes (IVa), diazo and distyryl dyes (IV’a) and (IV’’a), anthraquinone dyes (Va), and azomethine dyes (VIa) and (VI’a), and mixtures thereof: [Chemistry] In the formulas (IIIa), (III’a), (IVa), (IV’a), (IV’’a), (Va), (VIa), and (VI’a), · Ar is an aryl group substituted with at least one electron-donating group, for example, i) optionally substituted (C1-C8) alkyl, ii) optionally substituted (C1-C8) alkoxy, iii) (di)(C1-C8)(alkyl)amino in which the alkyl group is optionally substituted with a hydroxyl group, iv) aryl(C1-C8)alkylamino, v) optionally substituted N-(C1-C8)alkyl-N-aryl(C1-C8)alkylamino, and represents an aryl group such as phenyl or naphthyl, or Ar represents a duridine group; · Ar’ is an optionally substituted divalent (hetero)arylene group, for example, preferably phenylene, particularly paraphenylene, or naphthalene, optionally substituted with one or more (C1-C8) alkyl groups, hydroxyl groups, or (C1-C8) alkoxy groups; · Ar’’ is a (hetero)aryl group, preferably substituted with at least i) an electron-withdrawing group such as nitro, nitroso, -C(X)-X’-R’, or ii) (di)(C1-C6)(alkyl)amino group, iii) hydroxyl, iv) (C1-C6) alkoxy, and represents an optionally substituted (hetero)aryl group; in particular, (hetero)aryl is selected from imidazolyl, triazolyl, indolyl, or pyridyl, or preferably phenyl substituted with at least one group selected from nitro, nitroso, and amino substituting the para position of the phenyl group; · X, X’, and X’’ may be the same or different and represent an oxygen or sulfur atom or an NR’’ group, preferably an oxygen atom; · R 1 、R 2 、R 3 、and R 4may be the same or different and represent a hydrogen or halogen atom, or a group selected from hydroxyl, thiol, (C1-C4)alkyl, (C1-C4)alkoxy, (di)(C1-C4)(alkyl)amino, nitro, and nitroso; · R’ and R’’ represent a (C1-C4)alkyl group; · R a and R b may be the same or different and represent a hydrogen atom, or preferably a (C1-C8)alkyl group optionally substituted with a hydroxyl group; Or, as a variant, the substituent R a is the substituent of Ar’’, and / or R b is the substituent of Ar, and / or R a is R b together with the atom to which they are attached, forms a (hetero)cycloalkyl; In particular, R a and R b represent a hydrogen atom, or a (C1-C4)alkyl group optionally substituted with a hydroxyl group; · T and T’ may be the same or different and represent a C(R a ) group or N, preferably N; · L represents a divalent group -ALK-, -C(X)-ALK-, -ALK-C(X)-, or -C(X)-ALK-C(X’) - (wherein, ALK represents a linear or branched (C1-C6)alkylene group such as methylene, and X and X’ are as defined above), · R 22 、R 23 、R 24 、R 25 、R 26 、and R 27 may be the same or different and represent a hydrogen or halogen atom, or are as follows: - (C1-C6)alkyl; - hydroxyl, mercapto; - (C1-C6)alkoxy, (C1-C6)alkylthio; - aryloxy or arylthio; - aryl(C1-C6)(alkyl)amino; - (di)(C1-C6)(alkyl)amino; - (di)(hydroxy(C1-C6)alkyl)amino; represents a group selected from; ·Z’ represents a hydrogen atom or NR 28 R 29 group (wherein R 28 and R 29 may be the same or different and represent a hydrogen atom or - (C1-C6)alkyl; - polyhydroxy(C1-C6)alkyl such as hydroxyethyl; - one or more groups, especially i) (C1-C6)alkyl; iii) R°-C(X)-X’-, R°-X’-C(X)-, or R°-X’-C(X)-X’’- (wherein R° represents a (C1-C6)alkyl group and X, X’, and X’’ are as defined above); iv) aryl optionally substituted with sulfonate; - cycloalkyl; especially cyclohexyl represents a group selected from) represents; ·Z represents hydroxyl and NR’ 28 R’ 29 (wherein R’ 28 and R’ 29 may be the same or different and represent the same atoms or groups as R 28 and R 29 defined above) represents a group selected from.

[0097] The direct dye of formula (IV’’a) is preferably of formula (IV’’’a):

Chemical formula

[0098] The direct dyes of formula (IV''a) can be derived from curcumin, demethoxycurcumin, and bisdemethoxycurcumin.

[0099] Preferably, the direct dye is selected from the direct dyes of formula (IV''a) and (IV'''a) defined above and mixtures thereof.

[0100] According to a particularly preferred embodiment, the direct dye is a neutral direct dye selected from the following compounds (A)-(G) and mixtures thereof:

Chemical formula

[0101] Cationic direct dyes The direct dye can be selected from direct dyes that are cationic or have an affinity for acidic substances and are generally referred to as "basic dyes", especially those containing at least one cationic or cationizable group within or outside the ring in their structure.

[0102] As cationic azo dyes that can be used in the present invention, in particular, cationic dyes described in Kirk-Othmer’s Encyclopaedia of Chemical Technology, “Dyes, Azo”, J. Wiley & Sons, revised on April 19, 2010, can be mentioned.

[0103] Cationic azo dyes described in the patent applications of International Publication No. WO 95 / 15144 pamphlet, International Publication No. WO 95 / 01772 pamphlet, and European Patent No. EP 714954 specification can also be mentioned.

[0104] Cationic azo dyes described in Colour Index International, 3rd Edition, in particular the following compounds: Basic Red 22; Basic Red 76; Basic Yellow 57; Basic Brown 16; Basic Brown 17 can also be mentioned.

[0105] Among cationic quinone dyes, those described in Colour Index International, 3rd Edition are preferably used, and among them, in particular, the following dyes: Basic Blue 22; Basic Blue 99 can be mentioned.

[0106] Among azine dyes suitable for use, those listed in Colour Index International, 3rd Edition, for example, the following dyes: Basic Blue 17, Basic Red 2 can be mentioned.

[0107] Among cationic triarylmethane dyes that can be used in accordance with the present invention, in addition to those listed in Colour Index International, 3rd Edition, the following dyes: Basic Green 1, Basic Violet 3, Basic Violet 14, Basic Blue 7, Basic Blue 26 can be mentioned.

[0108] Direct dyes described in the documents of U.S. Patent No. 5,888,252, European Patent No. 1,133,975, International Publication No. WO 03 / 029359 pamphlet, European Patent No. 860,636, International Publication No. WO 95 / 01772 pamphlet, International Publication No. WO 95 / 15144 pamphlet, and European Patent No. 714,954 can also be mentioned.

[0109] Those listed in the encyclopedia "The Chemistry of Synthetic Dyes" 1952, Academic Press, volumes 1 to 7 by K. Venkataraman, in "Kirk - Othmer Encyclopaedia of Chemical Technology", chapter "Dyes and Dye Intermediates", 1993, Wiley and Sons, and in various chapters of "Ullmann’s Encyclopaedia of Industrial Chemistry", 7th edition, Wiley and Sons can also be mentioned.

[0110] Preferably, the cationic direct dye is selected from those obtained from azo and hydrazono type dyes.

[0111] Cationic direct dyes are described in European Patent No. 850636, French Patent No. 2788433, European Patent No. 920856, International Publication No. 9948465 Pamphlet, French Patent No. 2757385, European Patent No. 850637, European Patent No. 918053, International Publication No. 9744004 Pamphlet, French Patent No. 2570946, French Patent No. 2285851, German Patent No. 2538363, French Patent No. 2189006, French Patent No. 1560664, French Patent No. 1540423, French Patent No. 1567219, French Patent No. 1516943, French Patent No. 1221122, German Patent No. 4220388, German Patent No. 4137005, International Publication No. 0166646 Pamphlet, US Patent No. 5708151, International Publication No. 9501772 Pamphlet, International Publication No. 515144 Pamphlet, British Patent No. 1195386, US Patent No. 3524842, US Patent No. 5879413, European Patent No. 1062940, European Patent No. 1133976, British Patent No. 738585, German Patent No. 2527638, French Patent No. 2275462, British Patent No. 1974 - 27645, Acta Histochem. (1978), 61(1), 48 - 52; Tsitologiya (1968), 10(3), 403 - 5; Zh.Obshch.Khim., (1970), 40(1), 195 - 202; Ann.Chim.(Rome)(1975), 65(5 - 6), 305 - 14; Journal of the Chinese Chemical Society(Taipei)(1998), 45(1), 209 - 211; Rev.Roum.Chim.(1988), 33(4), 377 - 83; Text.Res.J.(1984), 54(2), 105 - 7; Chim.Ind.(Milan)(1974), 56(9), 600 - 3; Khim.Tekhnol.(1979), 22(5), 548 - 53; Ger.Monatsh.Chem.(1975), 106(3), 643 - 8; MRL Bull.Res.Dev.It may be a cationic azo dye described in (1992), 6(2), 21-7; Lihua Jianyan, Huaxue Fence (1993), 29(4), 233-4; Dyes Pigm. (1992), 19(1), 69-79; Dyes Pigm. (1989), 11(3), 163-72.

[0112] Preferably, the cationic direct dye contains a quaternary ammonium group; more preferably, the cationic charge is within the ring. This cationic group is, for example: - A cationic group having a (di / tri)(C1-C8) alkylammonium charge outside the ring; or - The following: acridinium, benzimidazolium, benzobistriazolium, benzopyrazolium, benzopyridazinium, benzquinolium, benzothiazolium, benzotriazolium, benzoxazolium, bipyridinium, bis-tetrazolium, dihydrothiazolium, imidazopyridinium, imidazolium, indolium, isoquinolium, naphthimidazolium, naphthoxoxazolium, naphthopyrazolium, oxadiazolium, oxazolium, oxazolopyridinium, oxonium, phenazinium, phenoxazolium, pyrazinium, pyrazolium, pyrazoyl triazolium, pyridinium, pyridinoimidazolium, pyrrolium, pyrylium, quinolinium, tetrazolium, thiadiazolium, thiazolium, thiazolopyridinium, thiazoyl imidazolium, thiopyrylium, triazolium or xanthylium, etc., a cationic group having an internal charge containing a cationic heteroaryl group selected from

[0113] Also included can be the cationic hydrazono direct dyes of the following formulas (IIb) and (IIIb) and the azo direct dyes of formulas (IVb) and (Vb): Het + -C(R a )=N-N(R b )-Ar,Q - (IIb); Het + -N(R a )-N=C(Rb )-Ar,Q - (IIIb); Het + -N=N-Ar,Q - (IVb); Ar + -N=N-Ar’’,Q - (Vb); [In formulas (IIb) to (Vb): ·Het + represents a cationic heteroaryl group such as imidazolium, indolium, or pyridinium, which is preferably optionally substituted with at least one (C1-C8) alkyl group such as methyl and preferably has a cationic charge in the ring; ·Ar + represents an aryl group such as phenyl or naphthyl, which has a cationic charge outside the ring, preferably a tri(C1-C8)alkylammonium such as trimethylammonium; ·Ar preferably represents an aryl group, particularly phenyl, which is optionally substituted with one or more electron-donating groups, for example, i) optionally substituted (C1-C8)alkyl, ii) optionally substituted (C1-C8)alkoxy, iii) (di)(C1-C8)(alkyl)amino in which the alkyl group is optionally substituted with a hydroxyl group, iv) aryl(C1-C8)alkylamino, v) N-(C1-C8)alkyl-N-aryl(C1-C8)alkylamino optionally substituted with an optionally substituted aryl group, or alternatively, Ar represents a djurolidine group; ·Ar’’ represents a (hetero)aryl group such as phenyl or pyrazolyl, which is optionally substituted and is preferably a (hetero)aryl group optionally substituted with one or more (C1-C8)alkyl, hydroxyl, (di)(C1-C8)(alkyl)amino, (C1-C8)alkoxy, or phenyl groups; ·R a and R b may be the same or different and each represents a hydrogen atom or, optionally, preferably a (C1-C8)alkyl group optionally substituted with a hydroxyl group; ·Alternatively, the substituent R ais Het + as a substituent of, and / or R b is a substituent of Ar, and / or R a is R b together with the atom to which these are attached, form a (hetero)cycloalkyl; in particular, R a and R b represent a hydrogen atom or a (C1-C4) alkyl group optionally substituted with a hydroxyl group; ·Q - represents an anionic counterion such as a halide, alkyl sulfate, or alkyl sulfonate].

[0114] In particular, azo and hydrazono direct dyes of formulas (IIb)-(Vb) having a cationic charge within the ring defined above can be mentioned. More specifically, cationic direct dyes of formulas (IIb)-(Vb) having a cationic charge within the ring, as described in WO 95 / 15144 pamphlet, WO 95 / 01772 pamphlet, and EP 714954 specification, can be mentioned.

[0115] Preferably, the following direct dyes can be mentioned:

Chemical formula

[0116] In particular, the dyes of formulas (II-1) and (IV-1) are Basic Red 51, Basic Yellow 87 and Basic Orange 31 or derivatives thereof:

Chemical formula

[0117] Fluorescent dye The direct dye can be selected from fluorescent direct dyes.

[0118] Examples of fluorescent dyes that can be used in the present invention include neutral, anionic, or cationic dyes selected from the following dyes: acridine, acridone, benzanthrone, benzimidazole, benzimidazolone, benzindole, benzoxazole, benzopyran, benzothiazole, coumarin, difluoro{2-[(2H-pyrrol-2-ylidene-kN)methyl]-1H-pyrrolato-kN}boron (BODIPY®), diketopyrrolopyrrole, fluorindine, (poly)methine (in particular, cyanine and styryl / hemicyanine), naphthalimide, naphthanilide, naphthylamine (such as dansyl), oxadiazole, oxazine, perylene, perinone, perylene, polyene / carotenoid, squalane, stilbene, xanthene.

[0119] The fluorescent dyes described in European Patent No. 1133975, International Publication No. 03 / 029359 Pamphlet, European Patent No. 860636, International Publication No. 95 / 01772 Pamphlet, International Publication No. 95 / 15144 Pamphlet, and European Patent No. 714954, as well as the encyclopaedia “The Chemistry of Synthetic Dyes” by K. Venkataraman, 1952, Academic Press, volumes 1 - 7, the “Dyes and Dye Intermediates” chapter of “Kirk - Othmer Encyclopaedia of Chemical Technology”, 1993, Wiley and Sons, various chapters of “Ullmann’s Encyclopaedia of Industrial Chemistry”, 7th edition, Wiley and Sons, and those described in the handbook “A Guide to Fluorescent Probes and Labeling Technologies”, 10th Ed., Molecular Probes / Invitrogen - Oregon 2005 which is circulated on the Internet or in a pre - printed version can also be mentioned.

[0120] According to a preferred modification, the fluorescent dye is a cationic polymethine containing at least one quaternary ammonium group, such as those of the following formula (Vb): W + -[C(R c )=C(R d )] m’ -Ar,Q - [In formula (Vb), ·W + contains in particular a quaternary ammonium, and this quaternary ammonium represents a cationic heterocyclic group or heteroaryl group optionally substituted with one or more (C1 - C8) alkyl groups optionally substituted with one or more hydroxyl groups; ·Ar is an aryl group such as phenyl or naphthyl, optionally and preferably substituted by: i) one or more halogen atoms such as chlorine or fluorine; ii) one or more (C1-C8) alkyls such as methyl, preferably (C1-C4) alkyl groups; iii) one or more hydroxyl groups; iv) one or more (C1-C8) alkoxys such as methoxy; v) one or more hydroxy(C1-C8) alkyls such as hydroxyethyl; vi) one or more amino groups or (di)(C1-C8) alkylamino groups in which the C1-C4 alkyl moiety is preferably optionally substituted by one or more hydroxyl groups, such as (di)hydroxyethylamino; vii) one or more acylamino groups; viii) one or more heterocycloalkyl groups, such as piperazinyl, piperidyl, or 5- or 6-membered heteroaryl, such as pyrrolidinyl, pyridyl, and imidazolinyl; ·m’ represents an integer in the range of 1 to 4; preferably, m’ is 1 or 2; more preferably, m’ = 1; ·R c and R d may be the same or different and represent a hydrogen atom, or an optionally substituted (C1-C8) alkyl group, preferably a (C1-C4) alkyl group, or, when R + adjacent to W c and / or R d adjacent to Ar combine with the atoms to which they are attached to form a (hetero)cycloalkyl; in particular, R c is adjacent to W + and they form a (hetero)cycloalkyl such as cyclohexyl; ·Q - is the anionic counterion defined above.

[0121] Anionic dyes Direct dyes can be selected from anionic direct dyes or dyes generally referred to as "acidic" direct dyes because of their affinity for alkaline substances.

[0122] The term "anionic direct dye" means any direct dye containing at least one CO2R or SO3R substituent [wherein R represents a hydrogen atom or a cation or ammonium ion derived from a metal or an amine] in its structure. Anionic dyes can be selected from acidic nitro direct dyes, acidic azo dyes, acidic azine dyes, acidic triarylmethane dyes, acidic indoamine dyes, acidic anthraquinone dyes, indigoids, and acidic natural dyes.

[0123] Preferably, the anionic direct dye is an acidic anthraquinone dye.

[0124] The direct dye can preferably be an anionic direct dye selected from the following formulas (III), (III'), (IV), (IV'), (V), (V'), (VI), (VI'), (VII), (VIII), (IX), and (X), and mixtures thereof: a) Diaryl anionic azo dyes of formula (III) or (III'):

Chemical formula

[0125] Examples of the dyes of formula (III) include: Acid Red 1, Acid Red 4, Acid Red 13, Acid Red 14, Acid Red 18, Acid Red 27, Acid Red 28, Acid Red 32, Acid Red 33, Acid Red 35, Acid Red 37, Acid Red 40, Acid Red 41, Acid Red 42, Acid Red 44, Pigment Red 57, Acid Red 68, Acid Red 73, Acid Red 135, Acid Red 138, Acid Red 184, Food Red 1, Food Red 13, Acid Orange 6, Acid Orange 7, Acid Orange 10, Acid Orange 19, Acid Orange 20, Acid Orange 24, Yellow 6, Acid Yellow 9, Acid Yellow 36, Acid Yellow 199, Food Yellow 3, Acid Violet 7, Acid Violet 14, Acid Blue 113, Acid Blue 117, Acid Black 1, Acid Brown 4, Acid Brown 20, Acid Black 26, Acid Black 52, Food Black 1, Food Black 2, Food Yellow 3, or Sunset Yellow, Examples of the dyes of formula (III') include: Acid Red 111, Acid Red 134, or Acid Yellow 38.

[0126] b) Anionic pyrazolone azo dyes of formula (IV) or (IV'): [Chemical formula] [In formulas (IV) and (IV'): ·R 11 、R 12 、and R 13 may be the same or different and are a hydrogen atom, a halogen atom, (C1-C6) alkyl, or -(O)2S(O -), M + group (where M + is as defined above); ·R 14 represents a hydrogen atom, a (C1 - C6) alkyl group, or -C(O)O - , M + group (where M + is as defined above); ·R 15 represents a hydrogen atom; ·R 16 represents an oxo group, in which case R’ 16 does not exist, or R 15 and R 16 together form a double bond; ·R 17 and R 18 may be the same or different and represent a hydrogen atom, or: - (O)2S(O - ), M + (where M + is as defined above); - Ar - O - S(O)2 - (where Ar represents an optionally substituted aryl group, preferably phenyl optionally substituted with one or more alkyl groups) represents a group selected from; ·R 19 and R 20 together form either a double bond or an optionally substituted benzo group D’; ·R’ 16 , R’ 19 , and R’ 20 may be the same or different and represent a hydrogen atom, a (C1 - C6) alkyl group or a hydroxyl group; ·R 21 represents a hydrogen atom, a (C1 - C6) alkyl group or a (C1 - C6) alkoxy group; ·R a and R b may be the same or different and are as defined above; preferably, R a represents a hydrogen atom and R b represents an aryl group such as phenyl; · Y represents either a hydroxyl group or an oxo group; ·

Chemical formula

[0127] Examples of the dyes of formula (IV) include: Acid Red 195, Acid Yellow 23, Acid Yellow 27, or Acid Yellow 76; examples of the dyes of formula (IV’) include: Acid Yellow 17.

[0128] c) Anthraquinone dyes of formula (V) or (V’):

Chemical formula

[0129] Examples of dyes of formula (V) include: Acid Blue 25, Acid Blue 43, Acid Blue 62, Acid Blue 78, Acid Blue 129, Acid Blue 138, Acid Blue 140, Acid Blue 251, Acid Green 25, Acid Green 41, Acid Violet 42, Acid Violet 43, Mordant Red 3, or Ext.Violet No.2: Examples of dyes of formula (V’) include: Acid Black 48.

[0130] d) Nitro dyes of formula (VI) or (VI’):

Chemical formula

Chemical formula

[0131] Examples of the dyes of formula (VI) include Acid Brown 13 and Acid Orange 3; examples of the dyes of formula (VI’) include Acid Yellow 1, the sodium salt of 2,4-dinitro-1-naphthol-7-sulfonic acid, 2-piperidino-5-nitrobenzenesulfonic acid, 2-(4’-N,N-2’’-hydroxyethyl)amino-2’-nitro)aniline ethanesulfonic acid, 4-β-hydroxyethylamino-3-nitrobenzenesulfonic acid; and Ext.D&C Yellow 7.

[0132] e) Triarylmethane dyes of formula (VII): [Chem.] [In formula (VII), ·R 33 , R 34 , R 35 , and R 36 may be the same or different and each represents a hydrogen atom or a group selected from (C1-C6) alkyl, optionally substituted aryl, and optionally substituted aryl(C1-C6)alkyl; in particular, a group selected from (C1-C6) alkyl groups and benzyl groups substituted with an optionally (O) m S(O - ),M + group (wherein M + and m are as defined above); ·R 37 , R 38 , R 39 , R 40 , R 41 , R 42 , R 43 , and R 44 may be the same or different and each represents a hydrogen atom or is as follows: - (C1-C6) alkyl; - (C1-C6) alkoxy, (C1-C6) alkylthio; - (di)(C1-C6)(alkyl)amino; - hydroxyl, mercapto; - nitro, nitroso; - R°-C(X)-X’-, R°-X’-C(X)-, or R°-X’-C(X)-X’’- (wherein R° represents a hydrogen atom or an alkyl or aryl group; X, X’, and X’’ may be the same or different and each represents an oxygen or sulfur atom or NR (wherein R represents a hydrogen atom or a (C1-C6) alkyl group)); - (O)2S(O - ),M + (wherein M + represents a hydrogen atom or a cationic counterion); - (O)CO- -, M + (wherein M + is as defined above); represents a group selected from, or - or two adjacent groups R 41 and R 42 or R 42 and R 43 or R 43 and R 44 together form a fused benzo group optionally substituted with one or more groups selected from: i) nitro; ii) nitroso; iii) (O)2S(O - )-, M + ; iv) hydroxyl; v) mercapto; vi) di(C1-C6)(alkyl)amino; vii) R°-C(X)-X’-; viii) R°-X’-C(X)-; ix) R°-X’-C(X)-X’’- (wherein M + , R°, X, X’, and X’’ are as defined above); In particular, R 37 ~R 40 represent hydrogen atoms, and R 41 ~R 44 may be the same or different and represent hydroxyl or (O)2S(O - )-, M + groups (wherein M + is as defined above); when R 43 and R 44 together form a benzo group, this is preferably substituted with a (O)2S(O - )- group; Provided that at least one of rings G, H, or I is: - at least one (O)2S(O - )-, M’ + group (wherein M’ + represents a cationic counterion); or - at least one (O)CO - -, M’ + group (wherein M’ + represents a cationic counterion); Preferably, at least one sodium sulfonate group; It is understood to include.

[0133] Examples of the dyes of formula (VII) include: Acid Blue 1; Acid Blue 3; Acid Blue 7; Acid Blue 9; Acid Violet 49; Acid Green 3; Acid Green 5, and Acid Green 50.

[0134] f) Xanthene dyes of formula (VIII): [Chemical formula] [In formula (VIII), ·R 45 、R 46 、R 47 、and R 48 may be the same or different and represent a hydrogen atom or a halogen atom; ·R 49 、R 50 、R 51 、and R 52 may be the same or different and represent a hydrogen atom, a halogen atom, or the following: - (C1-C6) alkyl; - (C1-C6) alkoxy, (C1-C6) alkylthio; - hydroxyl, mercapto; - nitro, nitroso; - (O)2S(O - )-,M + (wherein M + represents a hydrogen atom or a cationic counterion); - (O)CO - -,M + (wherein M + is as defined above); represents a group selected from; In particular, R 53 、R 54 、R 55 、and R 48 represent a hydrogen atom or a halogen atom; ·G is an oxygen or sulfur atom or NR eGroup (wherein R e is as defined above); in particular, G represents an oxygen atom; · L is an alkoxide O - , M + , a thioalkoxide S - , M + ; or an NR f group (wherein R f represents a hydrogen atom or a (C1-C6) alkyl group, and M + is as defined above; M + is particularly sodium or potassium); · L’ is an oxygen or sulfur atom or an ammonium group: N + R f R g (wherein R f and R g may be the same or different and represent a hydrogen atom, a (C1-C6) alkyl group, or an optionally substituted aryl group); in particular, L’ represents an oxygen atom or a phenylamino group optionally substituted with one or more alkyl or (O) m S(O - )-, M + groups (wherein m and M + are as defined above); · Q and Q’ may be the same or different and represent an oxygen or sulfur atom; in particular, Q and Q’ represent an oxygen atom; · M + is as defined above].

[0135] Examples of the dyes of formula (VIII) include: Acid Yellow 73, Acid Red 51, Acid Red 52, Acid Red 87, Acid Red 92, Acid Red 95, and Acid Violet 9.

[0136] g) Indole dyes of formula (IX):

Chemical Structure

[0137] Examples of the dyes of formula (IX) include Acid Blue 74.

[0138] h) quinoline dyes of formula (X): [In formula (X), ·R represents a hydrogen or halogen atom or a (C1-C6) alkyl group; 61 ·R ·R 62 , R 63 , and R 64 may be the same or different and represent a hydrogen atom or an (O)2S(O - ),M + group (wherein M + represents a hydrogen atom or a cationic counterion); or R 61 and R 62 or R 61 and R 64 together form a benzoyl group optionally substituted with one or more (O)2S(O - ),M + groups (wherein M + represents a hydrogen atom or a cationic counterion); provided that formula (X) contains at least one (O)2S(O - ),M’ + group (wherein M’ + represents a cationic counterion), preferably at least one sodium sulfonate group, and is understood to include].

[0139] Examples of the dyes of formula (X) include Acid Yellow 2, Acid Yellow 3, and Acid Yellow 5.

[0140] More specifically, the dyes of formulas (III) to (VIII) useful in the present invention are selected from the following: Acid Red 87 (VIII) (C.I. 45380); sodium salt of 2,4-dinitro-1-naphthol-7-sulfonic acid (VI’) (C.I. 10316); Acid Orange 3 (VI) (C.I. 10383); Acid Yellow 9 / Food Yellow 2 (III) (C.I. 13015); Direct Red 45 / Food Red 13 (III) (C.I. 14780); Acid Black 52 (III) (C.I. 13711); Acid Yellow 36 (III) (C.I. 13065); sodium salt of 1-hydroxy-2-(2’,4’-xylyl-5-sulfonatoazo)naphthalene-4-sulfonic acid / Food Red 1 (III) (C.I. 14700); Acid Red 14 / Food Red 3 / Mordant Blue 79 (III) (C.I. 14720); sodium salt of 4-hydroxy-3-[(2-methoxy-5-nitrophenyl)diaza]-6-(phenylamino)naphthalene-2-sulfonic acid / Acid Brown 4 (III) (C.I. 14805); Acid Orange 7 / Pigment Orange 17 / Solvent Orange 49 (III) (C.I. 15510); Food Yellow 3 / Pigment Yellow 104 (III) (C.I. 15985); Acid Red 27 / Food Red 9 (III) (C.I. 16185); Acid Orange 10 / Food Orange 4 (III) (C.I. 16230); Acid Red 44 (III) (C.I. 16250); Acid Red 33 / Food Red 12 (III) (C.I. 17200); Acid Red 184 (III) (C.I. 15685); Acid Violet 3 (III) (C.I. 19125); sodium salt of 1-hydroxy-2-(4’-acetamidophenylazo)-8-acetamidonaphthalene-3,6-disulfonic acid / Acid Violet 7 / Food Red 11 (III) (C.I. 18055); Acid Red 135 (III) (C.I.18130); Acid Yellow 27(IV)(C.I.19130); Acid Yellow 23 / Food Yellow 4(IV)(C.I.19140); 4’-(Sulfonato-2’’,4’’-dimethyl)-bis-(2,6-phenylazo)-1,3-dihydroxybenzene / Acid Orange 24(III)(C.I.20170); Sodium salt of 1-amino-2-(4’-nitrophenylazo)-7-phenylazo-8-hydroxynaphthalene-3,6-disulfonic acid / Acid Black 1(III)(C.I.20470); (4-((4-methylphenyl)sulfonyloxy)phenylazo)-2,2’-dimethyl-4-((2-hydroxy-5,8-disulfonato)naphthylazo)biphenyl / Acid Red 111(III’)(C.I.23266); Food Black 2(III)(C.I.27755); 1-(4’-sulfonatophenylazo)-4-((2’’-hydroxy-3’’-acetylamino-6’’,8’’-disulfonato)naphthylazo)-6-sulfonatonaphthalene (tetrasodium salt) / Food Black 1(III)(C.I.25440); Acid Blue 9(VII)(C.I.42090); Acid Violet 43(V)(C.I.60730); Acid Green 25(V)(C.I.61570); Sodium salt of 1-amino-4-cyclohexylamino-9,10-anthraquinone-2-sulfonic acid / Acid Blue 62(V)(C.I.62045); Acid Blue 78(V)(C.I.62105); Sodium salt of 4-hydroxy-3-((2-methoxyphenyl)azo)-1-naphthalenesulfonic acid / Acid Red 4(III)(C.I.14710); 2-piperidino-5-nitrobenzenesulfonic acid(VI’); 2(4’-N,N(2’’-hydroxyethyl)amino-2’-nitro)aniline ethanesulfonic acid(VI’); 4-β-hydroxyethylamino-3-nitrobenzenesulfonic acid(VI’); Acid Violet 49(VII)(C.I.42640); Acid Blue 7(VII)(C.I.42080); Sodium salt of 1,2-dihydroxy-3-sulfoanthraquinone / Mordant Red 3(V)(C.I.58005); Sodium salt of 1-amino-9,10-dihydro-9,10-dioxo-4-(phenylamino)-2-anthracenesulfonic acid / Acid Blue 25(V)(C.I.62055); Sodium salt of 4-hydroxy-3-((2-methoxyphenyl)azo)-1-naphthalenesulfonic acid / Acid Red 4(III)(C.I.14710).

[0141] Most of these dyes are described, in particular, in the Color Index published by The Society of Dyers and Colourists, P.O.Box 244, Perkin House, 82 Grattan Road, Bradford, Yorkshire, BD1 2JBN, England.

[0142] Particularly preferred anionic dyes are, in the Color Index, numbered C.I. 58005 (sodium salt of 1,2-dihydroxy-9,10-anthraquinone-3-sulfonic acid), C.I. 60730 (sodium salt of 2-[(9,10-dihydro-4-hydroxy-9,10-dioxo-1-anthracenyl)amino]-5-methylbenzenesulfonic acid), C.I. 15510 (sodium salt of 4-[(2-hydroxy-1-naphthalenyl)azo]benzenesulfonic acid), C.I. 15985 (disodium salt of 6-hydroxy-5-[(4-sulfophenyl)azo]-2-naphthalenesulfonic acid), C.I. 17200 (disodium salt of 5-amino-4-hydroxy-3-(phenylazo)-2,7-naphthalenesulfonic acid), C.I. 20470 (disodium salt of 1-amino-2-(4'-nitrophenylazo)-7-phenylazo-8-hydroxy-3,6-naphthalenedisulfonic acid), C.I. 42090 (disodium salt of N-ethyl-N-[4-[[4-[ethyl[(3-sulfophenyl)methyl]amino]phenyl](2-sulfophenyl)methylene]-2,5-cyclohexadien-1-ylidene]-3-sulfobenzenemethanaminium hydroxide, inner salt), C.I. 61570 (disodium salt of 2,2'-[(9,10-dihydro-9,10-dioxo-1,4-anthracenediyl)diimino]bis[5-methylbenzenesulfonic acid]).

[0143] Compounds corresponding to the mesomeric or tautomeric forms of structures (III) to (X) can also be used.

[0144] Natural dyes The direct dyes can be selected from natural direct dyes.

[0145] Among the natural direct dyes that can be used according to the present invention, there may be mentioned Lawson, Juglone, Alizarin, Purpurin, Carmic acid, Kermesic acid, Purpurogallin, Protocatechu aldehyde, Indigo, Isatin, Curcumin, Spinulosin, Apigenidin, Orcein, Brazilein, Brazilein, Hemin, or Hematexylin. It is also possible to use extracts or decoctions containing these natural dyes, particularly compresses or extracts based on henna dyes.

[0146] According to a preferred embodiment, the direct dye is selected from triarylmethane direct dyes of the following formulas (IIa1) and (IIa2) and mixtures thereof:

Chemical formula

[0147] The direct dye is preferably selected from Basic Red 51, HC Blue 15, and mixtures thereof.

[0148] The direct dye can be present in the composition in a total content in the range of 0.001% to 5% by weight, preferably 0.01% to 3% by weight, more preferably 0.1% to 1% by weight, even more preferably 0.1% to 0.5% by weight, based on the total weight of the composition.

[0149] According to a preferred embodiment, the composition contains a colorant in a total content of less than 0.1% by weight, preferably less than 0.01% by weight, more preferably less than 0.001% by weight, based on the total weight of the composition.

[0150] According to a more preferred embodiment, the composition does not contain a colorant.

[0151] Additional basifying agent The composition can also contain one or more additional basifying agents in addition to the carbonates, bicarbonates, and silicates defined above.

[0152] According to a preferred embodiment, the composition does not contain an additional basifying agent selected from aqueous ammonia and / or alkanolamine.

[0153] Acidifying agent The composition can further contain one or more acidifying agents.

[0154] The pH of the composition The composition preferably exhibits a pH of 11 or less, preferably 10.5 or less, and preferably 10 or less.

[0155] The pH of the composition can vary from 8 to 11, preferably from 8 to 10.5, and more preferably from 8 to 10.

[0156] According to a particularly preferred embodiment, the pH of the composition varies from 8.3 to 10.

[0157] Other characteristics of the composition The composition preferably contains water in a content ranging from 0.01% to 99% by weight, more preferably from 0.01% to 80% by weight, based on the total weight of the composition.

[0158] The composition can further contain at least one organic solvent.

[0159] The term "organic solvent" means an organic substance capable of dissolving other substances without undergoing chemical modification.

[0160] The composition can be provided in a liquid form, a beauty liquid form, a thickened form, particularly a gel, cream, wax, or paste, or a foam form.

[0161] The composition can also contain one or more additional compounds selected from non-ionic, anionic, cationic, or amphoteric surfactants; cationic, anionic, non-ionic, or zwitterionic associative or non-associative thickening polymers of natural or synthetic origin; silicones in the form of oils, gums, resins; or vegetable, mineral, or synthetic non-silicone oils; UV screening agents; pearlescent agents and metal oxides such as titanium dioxide, fillers such as clays; fragrances; peptizing agents; vitamin agents; and preservatives.

[0162] Further features of the method according to the invention In particular, the composition is applied to wet or dry keratin fibers.

[0163] Preferably, the keratin fibers are dark keratin fibers.

[0164] The term "dark keratin fibers" means hair having a color tone gradation of 6 or less (dark blond), preferably 4 or less (chestnut).

[0165] "Color tone gradation" is a unit known to hair styling experts according to European standards and is published in the book "Sciences des traitements capillaires [The Science of Hair Care]" by Charles Zviak 1988, edited by Masson, pages 215 and 278; the color tone gradation ranges from 1 (black) to 10 (very light blond), with 1 unit corresponding to 1 tone, and the higher the numerical value, the lighter the color shade.

[0166] The composition can advantageously be applied to the keratin fibers in an amount such that the composition ranges from 0.1 g to 20 g per gram of keratin fibers.

[0167] The composition generally remains at a predetermined position of the fibers for 1 minute to 1 hour, preferably 5 minutes to 60 minutes.

[0168] As an example, the composition can remain at a predetermined position of the fibers for 50 minutes.

[0169] The composition can remain at a predetermined position of the fibers under a closed system. Non-limiting examples of the closed system include a wrapped-type closed system made of aluminum foil or plastic film or a hair cap type with or without holes.

[0170] The temperature during the brightening method is between ambient temperature (15°C to 25°C) and 80°C, preferably between ambient temperature and 60°C.

[0171] As an example, the temperature during the brightening method is 33°C.

[0172] When the treatment is complete, optionally rinse the keratin fibers with water, optionally wash with shampoo, then rinse with water, and then dry or leave to air dry.

[0173] The drying step can be carried out by using blotting paper, a hair dryer, or a hood dryer.

[0174] The composition is preferably prepared by mixing at least two compositions. Preferably, the mixing of the at least two compositions is carried out by formulating immediately before applying the composition to the keratin fibers.

[0175] According to a preferred embodiment, the composition is at least two compositions, preferably two compositions: - i) Composition (A) comprising one or more chemical oxidizing agents selected from hydrogen peroxide, hydrogen peroxide generating systems other than peroxides, and mixtures thereof as defined above; and - ii) one or more bicarbonates and / or one or more bicarbonate generating systems as defined above, and iii) one or more silicates as defined above; and optionally iv) one or more carbonates and / or one or more carbonate generating systems as defined above Composition (B) obtained from the mixing of.

[0176] Preferably, at least one of composition (A) or (B) is aqueous.

[0177] According to a preferred embodiment, composition (A) is aqueous.

[0178] According to a particular embodiment, composition (B) is anhydrous.

[0179] According to a particular embodiment, composition (A) is aqueous and composition (B) is anhydrous.

[0180] The term "aqueous composition" means a composition containing at least 5% by weight of water. The aqueous composition preferably contains more than 10% by weight of water, and even more preferably more than 20% by weight of water.

[0181] According to a more preferred embodiment, the composition is at least two compositions, preferably two compositions: - i) Composition (A1) containing hydrogen peroxide; and - ii) one or more of the bicarbonates defined above, and iii) one or more of the silicates defined above; and optionally iv) one or more of the carbonates defined above, Composition (B1) obtained from the mixing of.

[0182] Preferably, at least one of Composition (A1) or (B1) is aqueous.

[0183] According to a preferred embodiment, Composition (A1) is aqueous.

[0184] According to a particular embodiment, Composition (B1) is anhydrous.

[0185] According to a particular embodiment, Composition (A1) is aqueous and Composition (B1) is anhydrous.

[0186] The composition used in the method according to the invention has an equivalent strength level L for keratin fibers lightened using a composition containing one or more persulfates * for the b * value measured at, preferably 10% lower, more preferably 15% lower b * value, enabling lightening of keratin fibers, b * and L * values are measured in the CIE L * a * b * system.

[0187] Preferably, b * and L *The value is measured according to the color evaluation method described in the examples.

[0188] Use According to a second aspect, the subject of the invention is the use of the composition defined above for lightening keratin fibers, preferably for lightening keratin fibers while simultaneously reducing yellowness.

[0189] Device (kit) having a plurality of compartments According to a third aspect, the subject of the invention is a device (kit) comprising a plurality of compartments: · a first compartment containing the composition (A) defined above; · a second compartment containing the composition (B) defined above and is a device (kit).

[0190] Preferably, the device comprising a plurality of compartments is: · a first compartment containing the composition (A1) defined above; · a second compartment containing the composition (B1) defined above and comprises.

Examples

[0191] The present invention can be more clearly understood by the examples shown below, which do not limit the nature of the present invention. In the examples shown below, unless otherwise specified, all amounts are expressed as mass percentages relative to the total mass of the composition.

[0192] Color evaluation method In these examples, the color of the hair was evaluated in the CIE L * a * b * system using a colorimeter which is a Minolta CM3610A Spectrophotometer (illuminant D65).

[0193] This L * a * b * In the system, L *represents the color intensity, a * represents the color shade in the green / red axis direction, b * represents the color shade in the blue / yellow axis direction. L * The higher the value of L, the brighter the color. a * The higher the value of a, the stronger the redness of the color, and b * The higher the value of b, the stronger the yellowness of the color.

[0194] Example 1 (comparison) The following compositions C1 to C12 were prepared and then applied according to the application procedure described below.

[0195]

Table 1

[0196]

Table 2

[0197] Application procedure Apply 10 g of each of the compositions C1 to C12 to 1 g of white HT4 hair, 12 bundles, on a hot plate maintained at a temperature of 33°C. Cover the whole with cellophane film for 50 minutes.

[0198] Subsequently, rinse the hair bundles, wash them with a standard shampoo, rinse again, and then dry them.

[0199] Color difference measurement Summarize the results of the color difference measurement in the following table.

[0200]

Table 3

[0201] The results show that the comparative compositions containing persulfate can obtain a good level of light color characterized by a relatively high L * value, but the resulting color shade has a significant yellow component characterized by a high b * value.

[0202] Example 2 The following compositions C13 - C20 were prepared and then applied according to the application procedure described below.

[0203]

Table 4

[0204]

Table 5

[0205] Application procedure Apply 10 g of each of the compositions C13 - C20 to 8 bundles of 1 g of white HT4 hair on a hot plate maintained at a temperature of 33°C. Cover the whole with cellophane film for 50 minutes.

[0206] Subsequently, rinse the hair bundles, wash with a standard shampoo, rinse again, and then dry.

[0207] Color difference measurement The results of the color difference measurement are summarized in the following table.

[0208]

Table 6

[0209] The results show that the compositions according to the present invention can obtain a good level of light color characterized by a relatively high L * value. Furthermore, as shown in Figure 1, for the obtained color shade, at the same intensity level L * of the compositions according to the present invention, the b * value is lower than that of the persulfate - based comparative composition of Example 1.

Claims

1. A method for lightening keratin fibers, comprising: i) one or more chemical oxidizing agents selected from hydrogen peroxide, hydrogen peroxide generating systems other than peroxide salts, and mixtures thereof; ii) one or more bicarbonates and / or one or more bicarbonate generating systems; iii) one or more silicates, comprising applying the composition comprising the above to the keratin fibers, - the silicate is present in a total content in the range of 3% to 40% by mass based on the total mass of the composition, - the composition contains a persulfate with a total content of less than 5% by mass or the composition does not contain persulfate.

2. The method according to claim 1, wherein the chemical oxidizing agent is hydrogen peroxide.

3. The method according to claim 1 or 2, wherein the chemical oxidizing agent is present in a total content in the range of 1% to 12% by mass based on the total mass of the composition.

4. The bicarbonate is selected from: - alkali metal bicarbonates; - alkaline earth metal bicarbonates; - Formula N ＋ R １ R ２ R ３ R ４ , HCO ３ － (wherein R １ , R ２ , R ３ , and R ４ are, independently of one another, a hydrogen atom or an optionally hydroxysubstituted (C １ -C ４ ) alkyl group) compound; - aminoguanidine bicarbonate; - mixtures thereof The method according to any one of claims 1 to 3.

5. The method according to any one of claims 1 to 4, wherein the bicarbonate and / or the bicarbonate generating system is present in a total content in the range of 0.01% to 20% by mass based on the total mass of the composition.

6. The method according to any one of claims 1 to 5, wherein the silicate is selected from alkali metal silicates, alkaline earth metal silicates, aluminum silicates, trimethylammonium silicates, and mixtures thereof.

7. The method according to any one of claims 1 to 6, wherein the silicate is present in a total content in the range of 3% to 35% by mass based on the total mass of the composition.

8. The method according to any one of claims 1 to 7, wherein the mass ratio of the total amount of bicarbonate and / or bicarbonate generating system ii) / the total amount of silicate iii) is 0.00025 to 20.

9. The method according to any one of claims 1 to 8, wherein the mass ratio of the total amount of bicarbonate and / or bicarbonate generating system ii) / the total amount of chemical oxidizing agent i) is 0.0008 to 20.

10. The method according to any one of claims 1 to 9, wherein the composition also comprises iv) one or more carbonates and / or one or more carbonate generating systems.

11. wherein the carbonate is selected from: - an alkali metal carbonate; - an alkaline earth metal carbonate; - a lanthanide carbonate; - a transition metal carbonate; - bismuth carbonate; - cadmium carbonate; - thallium carbonate; - zinc carbonate; - formula (N ＋ R １ R ２ R ３ R ４ ) ２ , ·CO ３ ２－ (wherein, R １ , R ２ , R ３ , and R ４ are, independently of one another, a hydrogen atom or an optionally hydroxyl group-substituted (C １ -C ４ ) alkyl group) compound; - guanidine carbonate; - mixtures thereof The method according to claim 10, selected from.

12. The method according to claim 10 or 11, wherein the carbonate and / or the carbonate generating system is present in a total content in the range of 0.01% to 20% by mass based on the total mass of the composition.

13. The method according to any one of claims 10 to 12, wherein the mass ratio of the total amount of carbonate and / or carbonate generating system (iv) to the total amount of bicarbonate and / or bicarbonate generating system (ii) is from 0.0005 to 2000.

14. The method according to any one of claims 1 to 13, wherein the composition comprises magnesium carbonate in a total content of less than 5% by mass.

15. The method according to any one of claims 1 to 14, wherein the composition comprises less than 1% by mass of persulfate or the composition does not contain persulfate.

16. The method according to any one of claims 1 to 15, wherein the pH of the composition varies from 8 to 11.

17. The method according to any one of claims 1 to 16, wherein the composition comprises a colorant in a total content of less than 0.1% by mass based on the total mass of the composition.

18. The composition as defined in any one of claims 1 to 17 comprises at least two compositions: - (i) a composition (A) comprising one or more chemical oxidizing agents selected from hydrogen peroxide, a hydrogen peroxide generating system other than a peroxide salt, and mixtures thereof as defined in claim 1 or 2; and - (ii) one or more bicarbonates and / or one or more bicarbonate generating systems as defined in any one of claims 1, 4, or 5, and (iii) one or more silicates as defined in claim 1 or 6; and optionally (iv) one or more carbonates and / or one or more carbonate generating systems as defined in claim 10 or 11 Composition (B) The method according to claim 17, obtained from the mixture of.

19. Use of the composition according to any one of claims 1 to 17 for lightening keratin fibers.

20. A device comprising a plurality of compartments, - a first compartment containing the composition (A) defined in claim 18; - a second compartment containing the composition (B) defined in claim 18; A device comprising these.

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