Method for treating keratin fibres comprising pre-treatment or post-treatment step

Abstract

The present invention relates to a method for treating keratin fibres, comprising applying to the fibres a composition comprising at least one chemical oxidizing agent, at least one (hydrogen) carbonate and at least one silicate, a composition comprising one or more compounds selected from the group consisting of organic acids, amino acids, chitosan, vitamin B, vitamin C, vanillin, salts thereof, solvates thereof and mixtures thereof is applied to the keratin fibres before and / or after the application.

Description

Technical Field

[0001] The present invention relates to a method for treating keratin fibers, which method comprises applying to these fibers a composition comprising at least one chemical oxidizing agent, at least one (bi)carbonate and at least one silicate, and before and / or after this application applying to these keratin fibers a composition comprising one or more compounds chosen from organic acids, amino acids, chitosan, vitamin B, vitamin C, vanillin, their salts, their solvates and mixtures thereof. Background Art

[0002] When people wish to change their hair color, especially when they wish to achieve a lighter color than their original color, hair lightening or bleaching is often required beforehand. In order to do this, lightening or bleaching products are used.

[0003] The lightening of hair is evaluated by the "depth of tone" which characterizes the degree or level of lightening. The concept of "tone" is based on a classification of natural shades, a tone separating each shade from the shade immediately behind or before it. This definition and classification of natural shades is well known to hair styling professionals and is disclosed in the book Sciences destraitementscapillaires [The Science of Hair Care] by Charles Zviak, 1988, published by Masson, pages 215 and 278.

[0004] The depth of hue ranges from 1 (black) to 10 (very light gold), with one integer corresponding to one hue; the higher the number, the lighter the hue.

[0005] It is known practice to lighten or bleach the hair, in the vast majority of cases under alkaline pH conditions, with a lightening or bleaching composition containing at least one chemical oxidizing agent. The action of this oxidizing agent is to degrade the melanin of the hair, which, depending on the nature of the oxidizing agent present and the pH conditions, results in a more or less pronounced lightening of the fibers. Thus, for relatively mild lightening, the oxidizing agent is generally hydrogen peroxide. When a greater lightening is desired, in particular when the treated hair is dark, persulfates are generally used in the presence of hydrogen peroxide. However, the lightening obtained by the action of this combination is not always satisfactory, since the hair obtained has a rather unattractive orange-yellow hue that is very different from the natural hue, which complicates subsequent coloring by limiting it to obtaining warm tones. Moreover, lightening compositions based on persulfates may lead to a deterioration of the quality and integrity of the fibers. The hair may then end up deformed or damaged, which leads in particular to pronounced breakage during combing or detangling.

[0006] Therefore, in order to overcome these drawbacks, it is common practice to use hair care compositions that aim to condition the hair by giving it satisfactory cosmetic properties, in particular smoothness, gloss, softness to the touch, suppleness and lightness, and also good detangling properties, so as to make it easy to comb and manage, so that it is easier to style and keep its shape. However, the conditioning effect obtained with these hair care compositions disappears rapidly over time and does not make it possible to strengthen the hair cortex, in particular by improving the density of bonds between proteins present in the cortex of the individual hairs, so as to protect or repair the individual hairs and reduce their breakage, for example during combing or detangling. Moreover, in certain cases, these care compositions may adversely affect the dyeing or bleaching of the hair thus treated.

[0007] There is therefore a real need to develop a process that makes it possible to obtain an effective lightening of keratin fibres, in particular dark keratin fibres, with a less yellow and more natural result. Such a process should also be more respectful of the quality and integrity of the fibres and make it possible in particular to maintain, indeed even improve, the quality and integrity of the keratin fibres and in particular to reduce their breakage, while avoiding adversely affecting the lightening, in particular the deyellowing, of the fibres thus treated.

[0008] The Applicant Company has surprisingly found that all or some of these objects can be achieved by the method according to the invention. Summary of the invention

[0009] According to a first aspect, the subject of the invention is a method for treating keratin fibers, comprising the following step b) and also the following step a) and / or the following step c):

[0010] a) applying to the keratin fibers a composition (A) comprising one or more compounds D chosen from organic acids, amino acids, chitosan, vitamin B, vitamin C, vanillin, their salts, their solvates and mixtures thereof, preferably chosen from organic acids, amino acids, chitosan, vitamin B, their salts, their solvates and mixtures thereof, the compounds D being present in the composition (A) in a total content by weight ranging from 1% to 20% by weight relative to the total weight of the composition (A);

[0011] b) applying to these keratin fibers a composition (B) comprising:

[0012] i) one or more chemical oxidants selected from hydrogen peroxide, hydrogen peroxide generating systems other than peroxide salts, and mixtures thereof;

[0013] ii) one or more compounds selected from carbonates, carbonate generating systems, bicarbonates, bicarbonate generating systems and mixtures thereof, preferably selected from carbonates, bicarbonates and mixtures thereof;

[0014] iii) one or more silicates;

[0015] c) applying to the keratin fibers a composition (C) comprising one or more compounds D as defined above, present in the composition (C) in a total content by weight ranging from 1% to 25% by weight relative to the total weight of the composition (C);

[0016] in:

[0017] - when step a) is present, step a) is performed before step b);

[0018] - when step c) is present, step c) is performed after step b);

[0019] - compositions (A) and (C) may be identical or different;

[0020] - Composition (B) comprises persulfates in a total content of less than 10% by weight.

[0021] According to a second aspect, a subject of the present invention is a composition (B) as defined above, comprising one or more compounds chosen from chitosan, vitamin B, vitamin C, vanillin, their salts, their solvates and mixtures thereof, preferably chosen from chitosan, vitamin B, their salts, their solvates and mixtures thereof.

[0022] According to a third aspect, a subject of the invention is the use of a composition (A) and / or (C) as defined above for reducing damage to keratin fibres treated by a method for treating keratin fibres with a composition (B) as defined above.

[0023] According to a fourth aspect, the subject of the invention is a multi-compartment device (kit) comprising:

[0024] ■ A first compartment containing a composition (B1) comprising:

[0025] - one or more chemical oxidizing agents as defined above, selected from hydrogen peroxide, hydrogen peroxide generating systems other than peroxide salts, and mixtures thereof, preferably hydrogen peroxide; and

[0026] ■ A second compartment containing a composition (B2) comprising:

[0027] - one or more compounds selected from carbonates, carbonate generating systems, bicarbonates, bicarbonate generating systems and mixtures thereof as defined above, preferably selected from carbonates, bicarbonates and mixtures thereof as defined above; and

[0028] - one or more silicates as defined above; and

[0029] - optionally one or more colorants, preferably selected from direct dyes, oxidation dyes and mixtures thereof; and

[0030] - optionally one or more compounds D as defined above; and

[0031] ■ a third compartment containing a composition (A) or (C) as defined above, which composition (A) or (C) can optionally comprise one or more colorants, preferably chosen from direct dyes, oxidative dyes and mixtures thereof; and

[0032] ■ A fourth compartment optionally containing a composition (B3) comprising one or more colorants, preferably chosen from direct dyes, oxidative dyes and mixtures thereof. DETAILED DESCRIPTION

[0033] Within the meaning of the present invention and unless otherwise indicated:

[0034] ■ The term "keratin fibers" is understood to mean fibers of human or animal origin, such as hair, body hair, eyelashes, eyebrows, wool, angora, cashmere or fur. According to the invention, the keratin fibers are preferably human keratin fibers, more preferably hair.

[0035] ■ The term "salt" is understood to mean an addition salt with an inorganic or organic acid or base. The addition salt with an acid is chosen in particular from the addition salt with an acid, such as hydrochloric acid, hydrobromic acid, sulfuric acid, citric acid, succinic acid, tartaric acid, lactic acid, toluenesulfonic acid, benzenesulfonic acid, phosphoric acid or acetic acid. The addition salt with a base is chosen in particular from the addition salt with a base, such as an alkalizing agent as defined below, in particular an alkali metal hydroxide, an alkaline earth metal hydroxide, ammonia, an amine or an alkanolamine.

[0036] ■The term "alkyl" is understood to mean a saturated straight-chain or branched hydrocarbon radical containing 1 to 30 carbon atoms, preferably 1 to 26 carbon atoms, more preferably 1 to 22 carbon atoms, for example methyl, ethyl, n-propyl, isopropyl, butyl, n-pentyl, n-hexyl, n-decyl, n-dodecyl, tetradecyl, hexadecyl or eicosyl.

[0037] ■Term "(C x -C y )alkyl" is understood to mean an alkyl group containing x to y carbon atoms.

[0038] ■The term "alkenyl" is understood to mean a straight-chain or branched hydrocarbon radical containing one or more conjugated or non-conjugated olefinic unsaturations and 1 to 30 carbon atoms, preferably 1 to 26 carbon atoms, more preferably 1 to 22 carbon atoms, for example vinyl, n-propenyl, isopropenyl, butenyl, n-pentenyl, n-hexenyl, n-decenyl, n-dodecenyl, tetradecenyl, hexadecenyl or eicosenyl.

[0039] ■Term "(C x -C y The term "alkenyl" is understood to mean an alkenyl group containing x to y carbon atoms.

[0040] ■ The term "alkoxy" is understood to mean an alkyl group bonded to an oxygen atom.

[0041] ■Term "(C x -C y )alkoxy" is understood to mean an alkoxy group containing x to y carbon atoms.

[0042] ■Term "(C x -C y )hydroxyalkyl" is understood to mean (C x -C y )alkyl, at least one of whose hydrogen atoms is replaced by a hydroxyl group (-OH).

[0043] ■The term "alkylamino" is understood to mean R'-NR a - group, wherein R' represents an alkyl group, and R a represents a hydrogen atom or a (C1-C4)alkyl group optionally substituted by one or more -X(O)OH groups, wherein X represents a carbon atom or S=O or P-OH, preferably, wherein X represents a carbon atom; R' and R a Capable of forming with the nitrogen atom that carries them a saturated or unsaturated 4- to 8-membered, preferably 5- or 6-membered cyclic group, which is optionally substituted, in particular by one or more identical or different groups selected from (C1-C4) (poly) hydroxyalkyl or (C1-C4) alkoxy groups.

[0044] ■The term "alkylamide" is understood to mean R"-NR a -CO- group, wherein R" represents an alkyl group, and R a represents a hydrogen atom or a (C1-C4)alkyl group optionally substituted by one or more -X(O)OH groups, wherein X represents a carbon atom or S=O or P-OH, preferably, wherein X represents a carbon atom; R" and R aCapable of forming with the nitrogen atom that carries them a saturated or unsaturated 4- to 8-membered, preferably 5- or 6-membered cyclic group, which is optionally substituted, in particular by one or more identical or different groups selected from (C1-C4) (poly) hydroxyalkyl or (C1-C4) alkoxy groups.

[0045] ■ The term "(hetero)cyclyl" is understood to mean a cyclic or heterocyclic group.

[0046] ■The term "cyclic group" is to be understood as meaning a saturated or unsaturated, in particular aromatic, fused or non-fused, monocyclic or polycyclic carbocyclic ring containing 6 to 22 carbon atoms, which cyclic group can be substituted by one or more identical or different groups, in particular selected from the following: (C1-C6)alkyl, (C1-C6)alkoxy, (C1-C6)hydroxyalkyl, hydroxyl (-OH) or carboxyl (-COOH).

[0047] ■The term "heterocyclic group" is to be understood as meaning a saturated or unsaturated, in particular aromatic, fused or non-fused, monocyclic or polycyclic group containing 5 to 22 ring members and containing 1 to 3 heteroatoms selected from nitrogen, oxygen or sulfur atoms, which heterocyclic group can be substituted by one or more identical or different groups, in particular selected from the following: (C1-C6)alkyl, (C1-C6)alkoxy, (C1-C6)hydroxyalkyl, hydroxyl (-OH) or carboxyl (-COOH).

[0048] ■The term "amino acid" is understood to mean a amino acid containing at least one carboxyl group (-COOH) or carboxylate group (-COO - ) or sulfonic acid group (-SO2OH) or sulfonic acid group (-SO2O - ) or sulfinyl (-SO2H) or sulfinate (-SO2 - ) group and at least one primary, secondary or tertiary amino group or one quaternary ammonium group.

[0049] ■ The term "silicate" is understood to mean the salts of silicic acid.

[0050] ■ The term "colorant" is understood to mean oxidation dyes, direct dyes or pigments.

[0051] ■ The term "oxidation dye" is understood to mean oxidation dye precursors selected from oxidation bases and couplers. Oxidation bases and couplers are colorless or slightly colored compounds which, in the presence of an oxidizing agent, form colored entities by condensation reactions.

[0052] ■ The term "direct dye" is understood to mean any natural and / or synthetic dye other than oxidation dyes, including in the form of extracts. These are colored compounds that will diffuse on the fiber superficially. They can be ionic or nonionic, i.e. anionic, cationic, neutral or nonionic.

[0053] ■ The term "chemical oxidant" is understood to mean an oxidant other than atmospheric oxygen.

[0054] Unless otherwise indicated, when referring to compounds in the present patent application, this is understood to also mean their optical isomers, their geometric isomers, their tautomers, their salts, their solvates (such as hydrates), and mixtures thereof.

[0055] The expressions "at least one" and "one or more" are synonymous and can be used interchangeably.

[0056] The expressions "lightening" and "bleaching" are synonymous and can be used interchangeably.

[0057] method

[0058] According to a first aspect, a subject of the present invention is a process for treating keratin fibres comprising step b) as defined above and also step a) and / or step c).

[0059] Steps a), b) and c) are separate.

[0060] According to a preferred embodiment, the method according to the invention is a method for lightening keratin fibers.

[0061] The Applicant Company has surprisingly found that the process according to the invention makes it possible to obtain an effective lightening of keratin fibres, with less yellowish and more natural results.

[0062] When comparing the color of keratin fibers treated by the process according to the invention with the color of keratin fibers treated by a process known from the prior art using a lightening composition, it is observed that, at equal intensity levels L*, the values ​​of b* measured in the CIEL*a*b* system are lower for the process according to the invention than for the process known from the prior art using a lightening composition.

[0063] Furthermore, the method according to the invention is more respectful of the qualities of the fibers and makes it possible in particular to maintain, indeed even improve, the quality of keratin fibers and in particular reduce their breakage, while avoiding adversely affecting the lightening, in particular the deyellowing, of the fibers thus treated.

[0064] In the method according to the invention, steps a) and b) must be consecutive, that is to say, when step a) is present, step a) is carried out before step b).

[0065] In the process according to the invention, steps b) and c) must be consecutive, that is to say step b) is carried out before step c) when step c) is present.

[0066] However, the method may comprise one or more additional steps between steps a) and b) and / or between steps b) and c).

[0067] Steps a) and c)

[0068] The method according to the invention comprises step a) and / or step c) as defined above.

[0069] According to a preferred embodiment, the method comprises step a) as defined above.

[0070] According to another preferred embodiment, the method comprises step c) as defined above.

[0071] According to another preferred embodiment, the method comprises step a) and step c) as defined above.

[0072] Compositions (A) and (C)

[0073] Compositions (A) and (C) comprise one or more compounds D selected from the group consisting of organic acids, amino acids, chitosan, vitamin B, vitamin C, vanillin, salts thereof, solvates thereof, and mixtures thereof.

[0074] Compositions (A) and (C) may be identical or different.

[0075] Compound D

[0076] Compounds D are present in composition (A) in a total content by weight preferably ranging from 3% to 20% by weight relative to the total weight of composition (A).

[0077] Compounds D are present in composition (C) in a total content by weight preferably ranging from 2% to 15% by weight relative to the total weight of composition (C).

[0078] According to a preferred embodiment, compound D is selected from organic acids, salts thereof, solvates thereof and mixtures thereof.

[0079] According to another preferred embodiment, compound D is selected from amino acids, salts thereof, solvates thereof and mixtures thereof.

[0080] According to another preferred embodiment, compound D is selected from chitosan, its salts, its solvates and mixtures thereof.

[0081] According to another preferred embodiment, compound D is selected from vitamin B, its salt, its solvate and a mixture thereof.

[0082] According to another preferred embodiment, compound D is selected from vitamin C, its salts, its solvates and mixtures thereof.

[0083] According to a particularly preferred embodiment, compound D is selected from vanillin, its solvates and mixtures thereof.

[0084] According to a particularly preferred embodiment, compound D is selected from organic acids, amino acids, salts thereof, solvates thereof and mixtures thereof.

[0085] According to a more particularly preferred embodiment, compound D is selected from a mixture of an organic acid and an amino acid, a salt thereof, a solvate thereof and a mixture thereof.

[0086] For example, compound D is selected from a mixture of glycine and citric acid.

[0087] Organic Acid

[0088] Preferably, the organic acid is selected from the compounds of the following formula (I):

[0089]

[0090] In formula (I):

[0091] ■X represents a carbon atom or S=O or P-OH, preferably a carbon atom;

[0092] ■A stands for -OR 4 Group or -CR 1 (R 2 ) p (R 3 ) group, it is understood that if X represents P-OH, then A represents -OR 4 Group;

[0093] ■p = 0 or 1;

[0094] ■R 1 Represents a hydrogen atom or a hydroxyl group (-OH) or -NR a -R c Group or -NR a -CO-R c Group;

[0095] ■R 2represents a hydrogen atom or a hydroxyl (-OH) or -X(O)OH group, wherein X is as defined above, in particular wherein X represents a carbon atom;

[0096] ■R 3 represents a hydrogen atom or a hydroxyl group (-OH) or a (hetero)cyclic group which is optionally substituted by one or more identical or different groups selected from the following: (C1-C6)alkyl, in particular (C1-C4)alkyl such as methyl, alkylcarbonyl-(CO)-R c , alkylcarbonyloxy-O-CO-R c , alkoxycarbonyl-CO-OR c , -OH, (C1-C6)alkoxy, in particular (C1-C4)alkoxy such as methoxy, -X(O)OH, in which X is as defined above, in particular in which X represents a carbon atom, or -OX(O)OH, in which X is as defined above, or R 3 represents an alkyl or alkenyl group or an alkylamino group or an alkylamide group, wherein the alkyl or alkenyl group or an alkylamino group or an alkylamide group is:

[0097] - optionally substituted by one or more identical or different groups selected from: -X(O)OH groups, wherein X is as defined above, in particular wherein X represents a carbon atom; hydroxyl (-OH) or a (hetero)cyclyl group; and / or

[0098] - optionally interrupted by one or more heteroatoms or groups selected from: -O-, -NR a -, -S-, -CO-, or combinations thereof, such as -O-CO-, -(CO)-O-, -NR a -(CO)- or -(CO)-NR a -;

[0099] R 1 and R 3 can form together with the carbon atoms carrying them a (hetero)cyclic group, which can be optionally substituted by one or more identical or different groups selected from the following: (C1-C6)alkyl, in particular (C1-C4)alkyl such as methyl, alkylcarbonyl-(CO)-R c , alkylcarbonyloxy-O-CO-R c , alkoxycarbonyl-CO-OR c , -OH, (C1-C6)alkoxy, in particular (C1-C4)alkoxy such as methoxy, -X(O)OH, wherein X is as defined above, in particular wherein X represents a carbon atom, or -OX(O)OH, wherein X is as defined above, in particular wherein X═P-OH;

[0100] R 1 and R 3can form a carbonyl group -CO- together with the carbon atom that carries them;

[0101] ■R 4 represents a hydrogen atom or an alkyl or alkenyl or (hetero)cyclic radical, which may be optionally substituted by one or more identical or different radicals selected from: a -X(O)OH radical, wherein X is as defined above, in particular wherein X represents a carbon atom or P-OH; a hydroxyl (-OH) or (hetero)cyclic radical;

[0102] ■R a represents a hydrogen atom or a (C1-C4)alkyl group optionally substituted by one or more -X(O)OH groups, wherein X is as defined above, in particular wherein X represents a carbon atom;

[0103] ■R c represents an alkyl or alkenyl group or an alkylamino group or an alkylamide group, wherein the alkyl or alkenyl group or an alkylamino group or an alkylamide group is:

[0104] - optionally substituted by one or more identical or different groups selected from: -X(O)OH groups, wherein X is as defined above, in particular wherein X represents a carbon atom; hydroxyl (-OH) or a (hetero)cyclyl group; and / or

[0105] - optionally interrupted by one or more heteroatoms or groups selected from: -O-, -S-, -CO-, -O-CO-, -O-CO-, -NR a -(CO)- or -(CO)-NR a -.

[0106] According to a specific embodiment of the present invention, the organic acid is selected from the compounds of formula (I), wherein X represents a carbon atom, A represents -CR 1 (R 2 )p(R 3 ) group, wherein p=1, R 1 Represents a hydrogen atom or -NR a -CO-R c Group, where R a and R c As defined above, preferably, R a represents a hydrogen atom and R c represents an alkyl group, R 2 represents a hydrogen atom or a hydroxyl group (-OH), R 3 represents a (hetero)cyclic group which is optionally substituted by one or more identical or different groups selected from the group consisting of: (C1-C6)alkyl, in particular (C1-C4)alkyl such as methyl, alkylcarbonyl-(CO)-R c , alkylcarbonyloxy-O-CO-R c , alkoxycarbonyl-CO-ORc , -OH, (C1-C6)alkoxy, in particular (C1-C4)alkoxy such as methoxy, or -C(O)OH, or R 3 represents an alkyl or alkenyl group, wherein:

[0107] - optionally substituted by one or more identical or different groups selected from: -C(O)OH group; hydroxyl group (-OH); and / or

[0108] -optionally inserted with -CO-, -O-CO-, -(CO)-O-, -NR a -(CO)-, -(CO)-NR a -, where R a As defined above, preferably there is optionally inserted -CO-, -O-CO-, -(CO)-O-.

[0109] According to a specific embodiment of the present invention, the organic acid is selected from the compounds of formula (I), wherein X represents a carbon atom, A represents -CR 1 (R 2 )(R 3 ) group, wherein R 1 represents a hydrogen atom, R 2 represents a hydrogen atom or a hydroxyl group (-OH), R 3 represents a (hetero)cyclic group, preferably an aromatic hydrocarbon group such as phenyl, which is optionally substituted by one or more identical or different groups selected from the following: (C1-C6)alkyl, especially (C1-C4)alkyl such as methyl, (C1-C6)alkoxy, especially (C1-C4)alkoxy such as methoxy, or -C(O)OH, or R 3 represents an alkyl or alkenyl group, which is optionally interrupted by -NR a -(CO)- or -(CO)-NR a -, where R a As defined above, preferably uninterrupted, and / or optionally substituted with hydroxyl groups.

[0110] According to another specific embodiment of the present invention, the organic acid is selected from the compounds of formula (I), wherein X represents a carbon atom, A represents -CR 1 (R 2 )(R 3 ) group, wherein R 1 Represents a hydrogen atom or -NR a -CO-R c Group, where R a and R c As defined above, preferably, R a represents a hydrogen atom and R c represents an alkyl group, R 2represents a hydrogen atom or a hydroxyl group (-OH), R 3 represents an alkyl or alkenyl group which is substituted by one or more -C(O)OH groups, in particular by one or two -C(O)OH groups, and:

[0111] - optionally substituted with one or more hydroxyl (-OH) groups; and / or

[0112] -optionally interspersed with -CO-, -O-CO-, -(CO)-O-, -(CO)-NR a -.

[0113] According to another specific embodiment of the present invention, the organic acid is selected from the compounds of formula (I), wherein X represents a carbon atom, A represents -CR 1 (R 3 ) group, wherein R 1 and R 3 Together with the carbon atoms that carry them, they form a (hetero)cyclic radical, which is preferably aromatic and optionally substituted by one or more identical or different radicals selected from: (C1-C6)alkyl, in particular (C1-C4)alkyl such as methyl, alkylcarbonyl-(CO)-R c , alkylcarbonyloxy-O-CO-R c , alkoxycarbonyl-CO-OR c , -OH, (C1-C6) alkoxy, especially (C1-C4) alkoxy such as methoxy, -C(O)OH, wherein R c As defined above.

[0114] According to a preferred embodiment, the organic acid is selected from compounds of formula (I), wherein:

[0115] ■X represents a carbon atom;

[0116] ■A stands for -CR 1 (R 2 ) p (R 3 ) group;

[0117] ■p=1;

[0118] ■R 1 represents a hydrogen atom or a hydroxyl group (-OH);

[0119] ■R 2 represents a hydrogen atom or a hydroxyl (-OH) or -C(O)OH group;

[0120] ■R 3 represents a hydrogen atom or a hydroxyl group (-OH) or an alkyl group or an alkenyl group or an alkylamino group or an alkylamide group, wherein the alkyl group or the alkenyl group or the alkylamino group or the alkylamide group is:

[0121] - optionally substituted by one or more identical or different groups selected from: -C(O)OH group; hydroxyl (-OH) or (hetero)cyclyl; and / or

[0122] - optionally interrupted by one or more heteroatoms or groups selected from: -O-, -NR a -, -S-, -CO-, or combinations thereof, such as -O-CO-, -(CO)-O-, -NR a -(CO)- or -(CO)-NR a -;

[0123] ■R a represents a hydrogen atom or a (C1-C4)alkyl group optionally substituted by one or more -C(O)OH groups.

[0124] According to a more preferred embodiment, the organic acid is selected from levulinic acid, N,N-bis(carboxymethyl)glutamic acid, oleic acid, citric acid, lactic acid, maleic acid, succinic acid, glutaric acid, tartaric acid, adipic acid and mixtures thereof.

[0125] N,N-bis(carboxymethyl)glutamic acid is preferably N,N-bis(carboxymethyl)-L-glutamic acid.

[0126] According to an even more preferred embodiment, the organic acid is selected from levulinic acid, N,N-bis(carboxymethyl)glutamic acid, oleic acid, citric acid and mixtures thereof.

[0127] According to the most preferred embodiment, the organic acid is selected from levulinic acid, N,N-bis(carboxymethyl)-L-glutamic acid, tetrasodium N,N-bis(carboxymethyl)-L-glutamate, oleic acid, citric acid and mixtures thereof.

[0128] Amino Acids

[0129] The amino acid may be selected from the group consisting of acidic amino acids, basic amino acids, polar neutral amino acids, non-polar neutral amino acids, and mixtures thereof.

[0130] The term "acidic amino acid" is understood to mean an amino acid comprising more acidic functional groups than basic functional groups, in particular a proteinogenic amino acid whose side chain comprises an acidic functional group. As examples of acidic amino acids, mention may be made of aspartic acid, glutamic acid and mixtures thereof.

[0131] The term "basic amino acid" is understood to mean an amino acid comprising more basic functional groups than acidic functional groups, in particular a proteinogenic amino acid whose side chain comprises a basic functional group. As examples of basic amino acids, mention may be made of arginine, histidine, lysine and mixtures thereof.

[0132] The term "polar neutral amino acid" is understood to mean an amino acid which is uncharged at pH = 7 and comprises a polar chemical functional group such as a thiol, alcohol or phenol functional group or a basic amide CONH2 functional group. As examples of polar neutral amino acids, mention may be made of serine, threonine, cysteine, asparagine, glutamine, tyrosine and mixtures thereof.

[0133] The term "non-polar neutral amino acid" is understood to mean an amino acid that is uncharged and non-polar at pH = 7. As examples of non-polar neutral amino acids, mention may be made of amino acids selected from the group consisting of glycine, alanine, valine, leucine, isoleucine, methionine, phenylalanine, tryptophan, proline and mixtures thereof.

[0134] The amino acids are preferably selected from the group consisting of glycine, proline, methionine, serine, arginine, lysine, carnitine, acetylcarnitine, propionylcarnitine, isovalerylcarnitine, taurine, hypotaurine, creatinine, carnosine, aspartame, and mixtures thereof.

[0135] More preferably, the amino acid is selected from the group consisting of glycine, proline, methionine, serine, arginine, lysine, carnitine, and mixtures thereof.

[0136] Still more preferably, the amino acid is selected from the group consisting of glycine, arginine, carnitine and mixtures thereof.

[0137] According to a preferred embodiment, the amino acid is selected from the group consisting of glycine, L-arginine and mixtures thereof.

[0138] Vitamin B

[0139] Preferably, the vitamin B is selected from vitamin B1, vitamin B3, vitamin B6 and mixtures thereof.

[0140] The term "vitamin B1" is understood to mean thiamine.

[0141] The term "vitamin B3" is understood to mean niacin or niacinamide.

[0142] The term "vitamin B6" is understood to mean pyridoxine, pyridoxal and pyridoxamine.

[0143] More preferably, the vitamin B is selected from vitamin B1, vitamin B6 and mixtures thereof.

[0144] Still more preferably, the vitamin B is selected from thiamine, pyridoxine, salts thereof and mixtures thereof.

[0145] Preferably, the vitamin B is selected from thiamine salts, pyridoxine salts and mixtures thereof.

[0146] As an example of a thiamine salt that can be used, thiamine hydrochloride may be mentioned.

[0147] As an example of a pyridoxine salt that can be used, mention may be made of pyridoxine hydrochloride.

[0148] According to a preferred embodiment, composition (A) comprises a total content of colorants of less than 0.1% by weight, preferably less than 0.01% by weight, more preferably less than 0.001% by weight, relative to the total weight of composition (A), and / or composition (C) comprises a total content of colorants of less than 0.1% by weight, preferably less than 0.01% by weight, more preferably less than 0.001% by weight, relative to the total weight of composition (C).

[0149] According to a more preferred embodiment, the composition (A) and / or (C) contains no colorant.

[0150] pH of compositions (A) and (C)

[0151] The pH of composition (A) is preferably greater than 7, more preferably in the range of 7 to 10, still more preferably in the range of 7.5 to 9.5.

[0152] The pH of composition (C) is preferably less than 7, more preferably in the range of 3 to 7, still more preferably in the range of 3.1 to 6.5, most preferably in the range of 3.5 to 6.

[0153] Composition (B)

[0154] According to a preferred embodiment, the composition (B) comprises:

[0155] i) hydrogen peroxide;

[0156] ii) one or more compounds selected from carbonates, bicarbonates and mixtures thereof;

[0157] iii) one or more silicates.

[0158] Chemical oxidants

[0159] Composition (B) comprises i) one or more chemical oxidizing agents selected from hydrogen peroxide, hydrogen peroxide generating systems other than peroxygenated salts, and mixtures thereof.

[0160] The hydrogen peroxide generating system other than peroxide salts may be selected from urea peroxide, polymer complexes capable of releasing hydrogen peroxide, oxidases and mixtures thereof.

[0161] As examples of polymer complexes which can release hydrogen peroxide, mention may be made of polyvinylpyrrolidone / H2O2, in particular provided in powder form, and other polymer complexes described in US Pat. No. 5,008,093, US Pat. No. 3,376,110 and US Pat. No. 5,183,901.

[0162] Oxidase enzymes can generate hydrogen peroxide in the presence of a suitable substrate such as, for example, glucose in the case of glucose oxidase or uric acid in the case of uricase.

[0163] According to a specific embodiment, hydrogen peroxide and / or a hydrogen peroxide generating system other than peroxygenated salts may be incorporated into the composition according to the invention just before applying the composition according to the invention to the keratin fibers. The intermediate composition comprising hydrogen peroxide and / or a hydrogen peroxide generating system other than peroxygenated salts may be called an oxidizing composition and may also comprise various additional compounds or various auxiliaries conventionally used in compositions for lightening keratin fibers.

[0164] According to a preferred embodiment, composition (B) comprises hydrogen peroxide as chemical oxidizing agent.

[0165] The chemical oxidizing agent is preferably present in composition (B) in a total content ranging from 1% to 12% by weight, more preferably ranging from 3% to 9% by weight, still more preferably ranging from 3.5% to 8.5% by weight relative to the total weight of composition (B).

[0166] According to a preferred embodiment, hydrogen peroxide is present in composition (B) in a total content ranging from 1% to 12% by weight, preferably ranging from 3% to 9% by weight, more preferably ranging from 3.5% to 8.5% by weight relative to the total weight of composition (B).

[0167] Carbonate (bicarbonate) and / or bicarbonate (bicarbonate) generating system

[0168] Composition (B) additionally comprises ii) one or more compounds selected from carbonates, carbonate generating systems, bicarbonates, bicarbonate generating systems and mixtures thereof.

[0169] According to a preferred embodiment, composition (B) additionally comprises ii) one or more compounds selected from carbonates, bicarbonates and mixtures thereof.

[0170] According to a more preferred embodiment, composition (B) additionally comprises ii) one or more compounds selected from ammonium carbonate, ammonium bicarbonate and mixtures thereof.

[0171] Compound ii) is preferably present in composition (B) in a total content ranging from 0.01% to 20% by weight, preferably ranging from 1% to 15% by weight, more preferably ranging from 2% to 15% by weight, still more preferably ranging from 4% to 15% by weight, relative to the total weight of composition (B).

[0172] Carbonates and / or carbonate generating systems

[0173] The term "carbonate generating system" is understood to mean a system which generates carbonates in situ, such as, for example, carbon dioxide in water or percarbonate in water.

[0174] Preferably, the carbonate is selected from:

[0175] - alkali metal carbonates;

[0176] - Alkaline earth metal carbonates;

[0177] - lanthanide carbonates;

[0178] - Transition metal carbonates;

[0179] - bismuth carbonate;

[0180] - cadmium carbonate;

[0181] - thallium carbonate;

[0182] - zinc carbonate;

[0183] -Formula (N + R 1 R 2 R 3 R 4 )2CO3 2- A compound wherein R 1 , R 2 , R 3 and R 4 independently of one another represent a hydrogen atom or a (C1-C4)alkyl group which is optionally substituted by a hydroxyl group;

[0184] -guanidine carbonate;

[0185] - mixtures thereof.

[0186] More preferably, the carbonate is selected from the group consisting of 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.

[0187] Still more preferably, the carbonate is selected from the group consisting of sodium carbonate, potassium carbonate, cesium carbonate, magnesium carbonate, calcium carbonate, cerium carbonate, manganese carbonate, zinc carbonate, ammonium carbonate, guanidine carbonate, and mixtures thereof.

[0188] Most preferably, the carbonate is selected from sodium carbonate, potassium carbonate, magnesium carbonate, calcium carbonate, ammonium carbonate and mixtures thereof.

[0189] According to a particularly preferred embodiment, the carbonate contained in composition (B) is ammonium carbonate.

[0190] The carbonates and / or carbonate generating systems are preferably present in composition (B) in a total content ranging from 0.01% to 20% by weight, more preferably ranging from 1% to 20% by weight, still more preferably ranging from 1% to 10% by weight, relative to the total weight of composition (B).

[0191] According to a preferred embodiment, the carbonate is present in composition (B) in a total content ranging from 0.01% to 20% by weight, preferably ranging from 1% to 20% by weight, more preferably ranging from 1% to 10% by weight, relative to the total weight of composition (B).

[0192] According to a preferred embodiment, compound ii) is selected from carbonates, carbonate generating systems and mixtures thereof, preferably selected from carbonates.

[0193] Bicarbonate and / or bicarbonate generating system

[0194] The term "bicarbonate generating system" is understood to mean a system which generates bicarbonate in situ, such as, for example, carbon dioxide in water or by buffering carbonate with an inorganic or organic acid.

[0195] Preferably, the bicarbonate salt is selected from:

[0196] - alkali metal bicarbonates;

[0197] - alkaline earth metal bicarbonates;

[0198] -Formula N + R 1 R 2 R 3 R 4 HCO3 - A compound wherein R 1 , R 2 , R 3 and R 4 independently of one another represent a hydrogen atom or a (C1-C4)alkyl group which is optionally substituted by a hydroxyl group;

[0199] -aminoguanidine bicarbonate;

[0200] - mixtures thereof.

[0201] More preferably, the bicarbonate salt is selected from the group consisting of sodium bicarbonate, potassium bicarbonate, lithium bicarbonate, cesium bicarbonate, calcium bicarbonate, magnesium bicarbonate, ammonium bicarbonate, choline bicarbonate, triethylammonium bicarbonate, aminoguanidine bicarbonate, and mixtures thereof.

[0202] Still more preferably, the bicarbonate salt is selected from sodium bicarbonate, potassium bicarbonate, cesium bicarbonate, calcium bicarbonate, magnesium bicarbonate, ammonium bicarbonate and mixtures thereof.

[0203] Most preferably, the bicarbonate salt is selected from sodium bicarbonate, potassium bicarbonate, ammonium bicarbonate and mixtures thereof.

[0204] According to a particularly preferred embodiment, the bicarbonate contained in composition (B) is ammonium bicarbonate.

[0205] The bicarbonate may originate from natural water, for example spring water from the Vichy basin or from La Roche Posay or Badoit water.

[0206] The bicarbonate and / or bicarbonate generating system is preferably present in composition (B) in a total content ranging from 0.01% to 20% by weight, more preferably ranging from 1% to 15% by weight, still more preferably ranging from 2% to 15% by weight, most preferably ranging from 4% to 15% by weight, relative to the total weight of composition (B).

[0207] According to a preferred embodiment, the bicarbonate is present in a total content ranging from 0.01% to 20% by weight, preferably ranging from 1% to 15% by weight, more preferably ranging from 2% to 15% by weight, still more preferably ranging from 4% to 15% by weight, relative to the total weight of composition (B).

[0208] According to a preferred embodiment, compound ii) is selected from bicarbonate, bicarbonate generating system and mixtures thereof, preferably selected from bicarbonate.

[0209] Silicate

[0210] The composition (B) additionally comprises iii) one or more silicates.

[0211] The silicate is preferably water soluble.

[0212] The term "water-soluble silicate" is understood to mean a silicate exhibiting a solubility in water of greater than 0.5% by weight, preferably greater than 1% by weight, at ordinary ambient temperature (25°C) and atmospheric pressure (760 mmHg).

[0213] Preferably, the silicate is selected from alkali metal silicates, alkaline earth metal silicates, aluminum silicates, trimethylammonium silicate and mixtures thereof.

[0214] More preferably, the silicate is selected from the group consisting of sodium silicate, potassium silicate, calcium silicate, aluminum silicate, trimethylammonium silicate, and mixtures thereof.

[0215] Still more preferably, the silicate is selected from sodium silicate.

[0216] Preferably, the silicate is chosen from compounds having the INCI name sodium silicate (CAS: [1344-09-8]) and / or sodium metasilicate (CAS: [6834-92-0]).

[0217] The silicate is preferably present in composition (B) in a total content ranging from 1% to 40% by weight, more preferably ranging from 2% to 35% by weight, still more preferably ranging from 3% to 35% by weight, most preferably ranging from 4% to 20% by weight, relative to the total weight of composition (B).

[0218] The weight ratio of the total amount of carbonates and / or carbonate generating systems / the total amount of silicates in composition (B) is preferably from 0.00025 to 20, more preferably from 0.028 to 10, still more preferably from 0.028 to 3.4.

[0219] According to a preferred embodiment, the weight ratio of the total amount of carbonates / the total amount of silicates in composition (B) is 0.00025 to 20, preferably 0.028 to 10, more preferably 0.028 to 3.4.

[0220] The weight ratio of the total amount of carbonates and / or carbonate generating systems / the total amount of chemical oxidants in composition (B) is preferably from 0.0008 to 20, more preferably from 0.1 to 6.6, still more preferably from 0.1 to 2.9.

[0221] According to a preferred embodiment, the weight ratio of the total amount of carbonates / the total amount of chemical oxidants in composition (B) is 0.0008 to 20, preferably 0.1 to 6.6, more preferably 0.1 to 2.9.

[0222] According to a preferred embodiment, the weight ratio of the total amount of carbonates / the total amount of hydrogen peroxide in composition (B) is 0.0008 to 20, preferably 0.1 to 6.6, more preferably 0.1 to 2.9.

[0223] The weight ratio of the total amount of bicarbonate and / or bicarbonate generating system / the total amount of silicate in composition (B) is preferably 0.00025 to 20, more preferably 0.02 to 7.5, still more preferably 0.05 to 5.

[0224] According to a preferred embodiment, the weight ratio of the total amount of bicarbonate / the total amount of silicate in composition (B) is 0.00025 to 20, preferably 0.02 to 7.5, more preferably 0.05 to 5.

[0225] The weight ratio of the total amount of bicarbonate and / or bicarbonate generating system / the total amount of chemical oxidizing agent in composition (B) is preferably from 0.0008 to 20, more preferably from 0.11 to 5, still more preferably from 0.2 to 4.2.

[0226] According to a preferred embodiment, the weight ratio of the total amount of bicarbonate salts / the total amount of chemical oxidizing agents in composition (B) is 0.0008 to 20, preferably 0.11 to 5, more preferably 0.2 to 4.2.

[0227] According to a more preferred embodiment, the weight ratio of the total amount of bicarbonate / the total amount of hydrogen peroxide in composition (B) is 0.0008 to 20, preferably 0.11 to 5, more preferably 0.2 to 4.2.

[0228] The weight ratio of the total amount of carbonates and / or carbonate generating systems / the total amount of bicarbonates and / or bicarbonate generating systems in composition (B) is preferably 0.0005 to 2000, more preferably 0.06 to 20, still more preferably 0.06 to 5.

[0229] According to a preferred embodiment, the weight ratio of the total amount of carbonates / the total amount of bicarbonates in composition (B) is 0.0005 to 2000, preferably 0.06 to 20, more preferably 0.06 to 5.

[0230] Composition (B) preferably comprises a total content of magnesium carbonate of less than 5% by weight, more preferably less than 1% by weight, still more preferably less than 0.1% by weight, most preferably less than 0.01% by weight and better still less than 0.001% by weight.

[0231] According to a particularly preferred embodiment, the composition contains no magnesium carbonate.

[0232] Composition (B) comprises a total content of persulfate of less than 10% by weight, preferably less than 5% by weight, more preferably less than 1% by weight, still more preferably less than 0.1% by weight, most preferably less than 0.01% by weight and better still less than 0.001% by weight.

[0233] According to a particularly preferred embodiment, the composition is free of persulfates.

[0234] According to a specific embodiment, composition (B) additionally comprises iv) one or more colorants, preferably chosen from direct dyes, oxidative dyes and mixtures thereof.

[0235] According to this particular embodiment, the method according to the invention is a method for the simultaneous bleaching and dyeing of keratin fibers.

[0236] When they are present in composition (B), the colorants are preferably present in composition (B) in a total content ranging from 0.001% to 10% by weight, more preferably ranging from 0.01% to 4% by weight, still more preferably ranging from 0.1% to 1% by weight, relative to the total weight of composition (B).

[0237] Oxidation dyes

[0238] Oxidation dyes are generally chosen from one or more oxidation bases, optionally in combination with one or more coupling agents (also called couplers).

[0239] Oxidation base

[0240] Composition (B) may optionally comprise one or more oxidation bases advantageously chosen from those conventionally used in dyeing keratin fibres.

[0241] By way of example, the oxidation base is selected from p-phenylenediamine, bis(phenyl)alkylenediamine, p-aminophenol, o-aminophenol and heterocyclic bases and the corresponding addition salts.

[0242] The p-phenylenediamines that may be mentioned include, for example, p-phenylenediamine, p-toluenediamine, 2-chloro-p-phenylenediamine, 2,3-dimethyl-p-phenylenediamine, 2,6-dimethyl-p-phenylenediamine, 2,6-diethyl-p-phenylenediamine, 2,5-dimethyl-p-phenylenediamine, N,N-dimethyl-p-phenylenediamine, N,N-diethyl-p-phenylenediamine, N,N-dipropyl-p-phenylenediamine, 4-amino-N,N-diethyl-3-methylaniline, N,N-bis(β-hydroxyethyl)-p-phenylenediamine, 4-N,N-bis(β-hydroxyethyl)amino-2-methylaniline, 4-N,N-bis(β-hydroxyethyl)amino-2-chloroaniline, 2-β-hydroxyethyl-p-phenylenediamine, 2-methoxymethyl-p-phenylenediamine, 2-fluoro-p-phenylenediamine, diamine, 2-isopropyl-p-phenylenediamine, N-(β-hydroxypropyl)-p-phenylenediamine, 2-hydroxymethyl-p-phenylenediamine, N,N-dimethyl-3-methyl-p-phenylenediamine, N-ethyl-N-(β-hydroxyethyl)-p-phenylenediamine, N-(β,γ-dihydroxypropyl)-p-phenylenediamine, N-(4'-aminophenyl)-p-phenylenediamine, N-phenyl-p-phenylenediamine, 2-β-hydroxyethyloxy-p-phenylenediamine, 2-β-acetylaminoethoxy-p-phenylenediamine, N-(β-methoxyethyl)-p-phenylenediamine, 4-aminophenylpyrrolidine, 2-thienyl-p-phenylenediamine, 2-β-hydroxyethylamino-5-aminotoluene and 3-hydroxy-1-(4'-aminophenyl)pyrrolidine and the corresponding addition salts with acids.

[0243] Among the above-mentioned p-phenylenediamines, p-phenylenediamine, p-toluenediamine, 2-isopropyl-p-phenylenediamine, 2-β-hydroxyethyl-p-phenylenediamine, 2-β-hydroxyethyloxy-p-phenylenediamine, 2,6-dimethyl-p-phenylenediamine, 2,6-diethyl-p-phenylenediamine, 2,3-dimethyl-p-phenylenediamine, N,N-bis(β-hydroxyethyl)-p-phenylenediamine, 2-chloro-p-phenylenediamine and 2-β-acetylaminoethoxy-p-phenylenediamine and corresponding addition salts with acids are particularly preferred.

[0244] 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 and the corresponding addition salts.

[0245] The p-aminophenols mentioned include, for example, p-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 and the corresponding addition salts with acids.

[0246] O-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.

[0247] Heterocyclic bases which may be mentioned include, for example, pyridine, pyrimidine and pyrazole derivatives.

[0248] Pyridine derivatives that may be mentioned include, for example, the compounds described in patents GB 1 026 978 and GB 1 153 196, such as 2,5-diaminopyridine, 2-(4-methoxyphenyl)amino-3-aminopyridine and 3,4-diaminopyridine and the corresponding addition salts.

[0249] Other pyridine oxidation bases for use in the present invention are the 3-aminopyrazolo[1,5-a]pyridine oxidation bases or the corresponding addition salts described, for example, in patent application FR 2 801 308. Examples that may be mentioned include pyrazolo[1,5-a]pyridin-3-ylamine, 2-acetylaminopyrazolo[1,5-a]pyridin-3-ylamine, 2-(morpholin-4-yl)pyrazolo[1,5-a]pyridin-3-ylamine, 3-aminopyrazolo[1,5-a]pyridine-2-carboxylic acid, 2-methoxypyrazolo[1,5-a]pyridin-3-ylamine, (3-aminopyrazolo[1,5-a]pyridin-7-yl)methoxypyrazolo[1,5-a]pyridin-3-ylamine. alcohol, 2-(3-aminopyrazolo[1,5-a]pyridin-5-yl)ethanol, 2-(3-aminopyrazolo[1,5-a]pyridin-7-yl)ethanol, (3-aminopyrazolo[1,5-a]pyridin-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-(morpholine-4- 2-[(3-aminopyrazolo[1,5-a]pyridin-7-yl)(2-hydroxyethyl)amino]ethanol, 3-aminopyrazolo[1,5-a]pyridin-7-yl)(2-hydroxyethyl)amino]ethanol, 3-aminopyrazolo[1,5-a]pyridin-3-ylamine, 3-(morpholin-4-yl)pyrazolo[1,5-a]pyridin-3-ylamine, 2-[(3-aminopyrazolo[1,5-a]pyridin-5-yl)(2-hydroxyethyl)amino]ethanol, 3-aminopyrazolo[1,5-a]pyridin-7-yl)(2-hydroxyethyl)amino]ethanol, 3-(morpholin-4-yl)pyrazolo[1,5-a]pyridin-3-ylamine, 2-[(3-aminopyrazolo[1,5-a]pyridin-5-yl)(2-hydroxyethyl)amino]ethanol, 3-aminopyrazolo[1,5-a]pyridin-7-yl)(2-hydroxyethyl)amino]ethanol, 3-aminopyrazolo[1,5-a]pyridin-3-ylamine ... oxazolo[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-dimethylpiperazinium-1-yl)-3-aminopyrazolo[1,5-a]pyridine, and corresponding addition salts.

[0250] More particularly, the oxidation base used in the invention is chosen from 3-aminopyrazolo[1,5-a]pyridine, which is preferably substituted on carbon atom 2 by:

[0251] a) (di)(C1-C6)(alkyl)amino, the alkyl group may be substituted with at least one hydroxyl, amino or imidazolium group;

[0252] b) an optionally cationic 5- to 7-membered heterocycloalkyl group containing 1 to 3 heteroatoms, which is optionally substituted by one or more (C1-C6)alkyl groups, such as a di(C1-C4)alkylpiperazinium group; or

[0253] c) (C1-C6)alkoxy optionally substituted by one or more hydroxy groups, such as β-hydroxyalkoxy, and the corresponding addition salts.

[0254] Pyrimidine derivatives that may be mentioned include the compounds described, for example, in patents DE 2359399, JP 88-169571, JP 05-63124 and EP 0 770 375 or in patent application WO 96 / 15765, such as 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 addition salts thereof and also tautomeric forms thereof when tautomeric equilibrium exists.

[0255] Pyrazole derivatives that may be mentioned include those described in patents DE 3843892 and DE 4133957 and patent applications WO 94 / 08969, WO 94 / 08970, FR-A-2 733 749 and DE 195 43 Compounds in 988, 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 4,5-diamino-3-hydroxymethyl-1-methylpyrazole, 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 corresponding addition salts. 4,5-diamino-1-(β-methoxyethyl)pyrazole can also be used.

[0256] Preference will be given to using 4,5-diaminopyrazole and even more preferably 4,5-diamino-1-(β-hydroxyethyl)pyrazole and / or the corresponding salts.

[0257] Pyrazole derivatives that may also be mentioned include diamino-N,N-dihydropyrazolopyrazolones and in particular those described in patent application FR-A-2 886 136, such as the following compounds and the 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-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-pyridazin-1-one -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, 2,3-diamino-6-hydroxy-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one.

[0258] Preference will be given to using 2,3-diamino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one and / or the corresponding salts.

[0259] As heterocyclic bases, preference is given to using 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.

[0260] Color former

[0261] Composition (B) may optionally comprise one or more couplers, advantageously chosen from those conventionally used in dyeing keratin fibres.

[0262] Among these couplers, mention may in particular be made of meta-phenylenediamine, meta-aminophenol, resorcinol, naphthalene-based couplers and heterocyclic couplers, and also the corresponding addition salts.

[0263] Mention may be made, for example, of 1,3-dihydroxybenzene, 1,3-dihydroxy-2-methylbenzene, 4-chloro-1,3-dihydroxybenzene, 2,4-diamino-1-(β-hydroxyethoxy)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-dimethoxy- pyridine, 1-N-(β-hydroxyethyl)amino-3,4-methylenedioxybenzene, 2,6-bis(β-hydroxyethylamino)toluene, 6-hydroxyindoline, 2,6-dihydroxy-4-methylpyridine, 1H-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, 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, the corresponding addition salts with acids and the corresponding mixtures.

[0264] In general, the addition salts of oxidation bases and couplers which can be used in the context of the present invention are chosen especially from addition salts with acids such as hydrochlorides, hydrobromides, sulfates, citrates, succinates, tartrates, lactates, toluenesulfonates, benzenesulfonates, phosphates and acetates.

[0265] The oxidation bases each advantageously represent from 0.001% to 10% by weight relative to the total weight of composition (B), and preferably from 0.005% to 5% by weight relative to the total weight of composition (B).

[0266] The couplers, if they are present, each advantageously represent from 0.001% to 10% by weight relative to the total weight of composition (B), and preferably from 0.005% to 5% by weight relative to the total weight of composition (B).

[0267] Direct dyes

[0268] Composition (B) may additionally comprise one or more direct dyes.

[0269] Synthetic direct dyes which can be used are, for example, chosen from those conventionally used for direct dyeing, and among them there may be mentioned all customary aromatic and / or non-aromatic dyes, such as nitrobenzene, azo, hydrazono, nitro(hetero)aryl, tri(hetero)arylmethane, (poly)methine, carbonyl, azine, porphyrin, metalloporphyrin, quinone and in particular anthraquinone, indigoamine and phthalocyanine direct dyes, and mixtures thereof.

[0270] Among the nitrobenzene direct dyes, mention may be made of: 1,4-diamino-2-nitrobenzene, 1-amino-2-nitro-4-β-hydroxyethylaminobenzene, 1-amino-2-nitro-4-bis(β-hydroxyethyl)aminobenzene, 1,4-bis(β-hydroxyethylamino)-2-nitrobenzene, 1-β-hydroxyethylamino-2-nitro-4-bis(β-hydroxyethylamino)benzene, 1-β-hydroxyethylamino-2-nitro-4-aminobenzene, 1-β-hydroxyethylamino-2-nitro-4-(ethyl)(β-hydroxyethyl)aminobenzene. Aminobenzene, 1-amino-3-methyl-4-β-hydroxyethylamino-6-nitrobenzene, 1-amino-2-nitro-4-β-hydroxyethylamino-5-chlorobenzene, 1,2-diamino-4-nitrobenzene, 1-amino-2-β-hydroxyethylamino-5-nitrobenzene, 1,2-bis(β-hydroxyethylamino)-4-nitrobenzene, 1-amino-2-tris(hydroxymethyl)methylamino-5-nitrobenzene, 1-hydroxy-2-amino-5-nitrobenzene, 1-hydroxy-2-amino-4-nitrobenzene, 1-hydroxy-3-nitrobenzene 1-β-hydroxyethyloxy-2-β-hydroxyethylamino-5-nitrobenzene, 1-methoxy-2-β-hydroxyethylamino-5-nitrobenzene, 1-β-hydroxyethyloxy-3-methylamino-4-nitrobenzene, 1-β,γ-dihydroxypropoxy-3-methylamino-4-nitrobenzene, 1-β-hydroxyethylamino-4-β,γ-dihydroxypropoxy-2-nitrobenzene, 1-β,γ-dihydroxypropylamino-4-trifluoromethyl-2-nitrobenzene -nitrobenzene, 1-β-hydroxyethylamino-4-trifluoromethyl-2-nitrobenzene, 1-β-hydroxyethylamino-3-methyl-2-nitrobenzene, 1-β-aminoethylamino-5-methoxy-2-nitrobenzene, 1-hydroxy-2-chloro-6-ethylamino-4-nitrobenzene, 1-hydroxy-2-chloro-6-amino-4-nitrobenzene, 1-hydroxy-6-bis(β-hydroxyethyl)amino-3-nitrobenzene, 1-β-hydroxyethylamino-2-nitrobenzene, 1-hydroxy-4-β-hydroxyethylamino-3-nitrobenzene.

[0271] Among the azo direct dyes, mention may be made of: Basic Red 51, Basic Orange 31, Disperse Red 17, Acid Yellow 9, Acid Black 1, Basic Red 22, Basic Red 76, Basic Yellow 57, Acid Yellow 36, Acid Orange 7, Acid Red 33, Acid Red 35, Acid Yellow 23, Acid Orange 24, Disperse Black 9, Basic Brown 16, Basic Brown 17.

[0272] Among the hydrazine direct dyes, mention may be made of: Basic Yellow 87.

[0273] Among the nitroaryl direct dyes, mention may be made of: HC Blue 2, HC Yellow 2, HC Red 3, 4-hydroxypropylamino-3-nitrophenol, N,N′-bis(2-hydroxyethyl)-2-nitrophenylenediamine.

[0274] Among the triarylmethane direct dyes, mention may be made of: basic violet 1, basic violet 2, basic violet 3, basic violet 4, basic violet 14, basic blue 1, basic blue 7, basic blue 26, basic green 1, basic blue 77 (also known as HC blue 15), acid blue 1; acid blue 3; acid blue 7, acid blue 9; acid violet 49; acid green 3; acid green 5; acid green 50.

[0275] Among the quinone direct dyes, mention may be made of: Disperse Red 15, Solvent Violet 13, Acid Violet 43, Disperse Violet 1, Disperse Violet 4, Disperse Blue 1, Disperse Violet 8, Disperse Blue 3, Disperse Red 11, Acid Blue 62, Disperse Blue 7, Basic Blue 22, Disperse Violet 15, Basic Blue 99, and also the following compounds: 1-N-methylmorpholiniumpropylamino-4-hydroxyanthraquinone, 1-aminopropylamino-4-methylaminoanthraquinone, 1-Aminopropylaminoanthraquinone, 5-β-hydroxyethyl-1,4-diaminoanthraquinone, 2-aminoethylaminoanthraquinone, 1,4-bis(β,γ-dihydroxypropylamino)anthraquinone, Acid Blue 25, Acid Blue 43, Acid Blue 78, Acid Blue 129, Acid Blue 138, Acid Blue 140, Acid Blue 251, Acid Green 25, Acid Green 41, Acid Violet 42, Mordant Red 3, Acid Black 48, HC Blue 16.

[0276] Among the azine direct dyes, mention may be made of: Basic Blue 17, Basic Red 2.

[0277] Among the indigoamine direct dyes, mention may be made of: 2-β-hydroxyethylamino-5-[bis(β-4′-hydroxyethyl)amino]anilino-1,4-benzoquinone, 2-β-hydroxyethylamino-5-(2′-methoxy-4′-amino)anilino-1,4-benzoquinone, 3-N-(2′-chloro-4′-hydroxy)phenylacetylamino-6-methoxy-1,4-benzoquinoneimine, 3-N-(3′-chloro-4′-methylamino)phenylureido-6-methyl-1,4-benzoquinoneimine, 3-[4′-N-(ethylcarbamoylmethyl)amino]phenylureido-6-methyl-1,4-benzoquinoneimine.

[0278] The natural direct dyes that can be used are selected from, for example, arthenone, juglone, indigo, indigo white, indirubin, isatin, henna acid, alizarin, safflower, morin, purpurin, carminic acid, carminic acid, lac acid, erythrogallol, protocatechualdehyde, curcumin, penicillin, apigenin, lichen red, carotenoids, betanin, chlorophyll, chlorophyllin, Monascus, polyphenols or o-diphenols.

[0279] Among the ortho-diphenols used according to the invention, mention may be made of: catechin, quercetin, brazilwood, oxidized hematoxylin, hematoxylin, chlorogenic acid, caffeic acid, gallic acid, L-DOPA, cyanidin, (-)-epicatechin, (-)-epigallocatechin, (-)-epigallocatechin-3-gallate (EGCG), isoquercetin, auranthus flavonoids, escin, 6,7-dihydroxy-3-(3-hydroxy-2,4-dimethoxyphenyl)coumarin, pterostilbene A and B, mangiferin, butein, coreopsistin, thiocyanin, robinin, betaine, 6,7-dihydroxy-3,4-dihydro-2H-isoquinolin-1-one (pericampylinone A), theaflavins, proanthocyanidin A2, proanthocyanidin B2, proanthocyanidin C1, proanthocyanidin DP 4-8, tannic acid, gallol, 5,6-dihydroxy-2-methyl-1,4-naphthoquinone, alizarin, wedelia lactone and natural extracts containing them.

[0280] The direct dyes may be present in composition (B) in a total content ranging from 0.001% to 5% by weight, preferably from 0.01% to 3% by weight, more preferably from 0.1% to 1% by weight, still more preferably from 0.1% to 0.8% by weight relative to the total weight of composition (B).

[0281] According to a preferred embodiment, composition (B) comprises a total content of colorants less than 0.1% by weight, preferably less than 0.01% by weight, more preferably less than 0.001% by weight, relative to the total weight of composition (B).

[0282] According to a more preferred embodiment, composition (B) contains no colorant.

[0283] pH of composition (B)

[0284] Composition (B) preferably exhibits a pH of less than or equal to 11, preferably less than or equal to 10.5, preferably less than or equal to 10.

[0285] The pH of composition (B) may vary from 8 to 11, preferably from 8 to 10.5, more preferably from 8 to 10.

[0286] According to a particularly preferred embodiment, the pH of the composition (B) according to the invention varies from 8.3 to 10.

[0287] The composition (B) may additionally comprise one or more compounds D as defined above. The respective features described above for the compound D also apply to the compound D that may be comprised in the composition (B).

[0288] Compound D is preferably present in composition (B) in a total content by weight ranging from 1% to 20% by weight, more preferably ranging from 2% to 15% by weight, still more preferably ranging from 5% to 12% by weight, relative to the total weight of composition (B).

[0289] Composition (A), (B) and / or (C)

[0290] Alkalizing agent

[0291] Compositions (A) and / or (B) and / or (C) may additionally comprise one or more alkalizing agents other than the carbonates, bicarbonates and silicates as defined above.

[0292] The alkalizing agents may be inorganic or organic. They may be selected from i) aqueous ammonia, ii) alkanolamines such as mono-, di- and triethanolamine and also derivatives thereof, iii) oxyethylidene and / or oxypropylidene ethylenediamine, iv) inorganic or organic hydroxides, v) amino acids, preferably basic amino acids such as arginine, lysine, ornithine, citrulline and histidine, and vi) compounds of the following formula (II):

[0293]

[0294] in:

[0295] -W is a divalent (C1-C8)alkylene group, preferably a propylene group, which is optionally substituted, in particular, by hydroxy or C1-C4 alkyl;

[0296] -R a , R b , R c and R d may be the same or different and represent a hydrogen atom or a C1-C4 alkyl group or a C1-C4 hydroxyalkyl group;

[0297] vii) and mixtures thereof.

[0298] The inorganic or organic hydroxide is preferably selected from i) alkali metal hydroxides, such as sodium hydroxide or potassium hydroxide, ii) alkaline earth metal hydroxides, iii) transition metal hydroxides, such as hydroxides of metals of Groups III, IV, V and VI, iv) hydroxides of lanthanides or actinides.

[0299] When they are present, alkalizing agents other than carbonates, bicarbonates and silicates as defined above preferably represent from 0.001% to 20% by weight, more particularly from 0.005% to 16% by weight relative to the total weight of composition (A) or (B) or (C).

[0300] According to a preferred embodiment, composition (A) and / or (B) and / or (C) does not contain an alkalizing agent selected from ammonia and / or alkanolamines.

[0301] Acidifier

[0302] Compositions (A) and / or (B) and / or (C) may additionally comprise one or more acidulants.

[0303] Among the acidifying agents, mention may be made, by way of example, of inorganic acids, such as, for example, hydrochloric acid, (ortho)phosphoric acid, boric acid, nitric acid or sulfuric acid, or of organic acids, such as, for example, compounds comprising at least one carboxylic acid function (such as acetic acid, tartaric acid, citric acid or lactic acid), one sulfonic acid function, one phosphonic acid function or one phosphoric acid function.

[0304] Chelating agents

[0305] Compositions (A) and / or (B) and / or (C) may optionally contain one or more chelating agents. As examples of chelating agents that can be used in the present invention, N,N-bis(carboxymethyl)-L-glutamic acid and tetrasodium N,N-bis(carboxymethyl)-L-glutamate may be mentioned.

[0306] Other characteristics of compositions (A), (B) and / or (C)

[0307] Compositions (A) and / or (B) and / or (C) preferably comprise water in a content ranging from 5% to 99% by weight, more preferably ranging from 5% to 80% by weight, relative to the total weight of the composition.

[0308] Compositions (A) and / or (B) and / or (C) may additionally comprise at least one organic solvent.

[0309] The term "organic solvent" is understood to mean an organic substance that is able to dissolve another substance without chemically modifying it.

[0310] As organic solvents, there may be mentioned, for example, lower C2-C4-alkanols, such as ethanol and isopropanol, polyols and polyol ethers, such as 2-butoxyethanol, propylene glycol, propylene glycol monomethyl ether, diethylene glycol monoethyl ether or diethylene glycol monomethyl ether, and also aromatic alcohols, such as benzyl alcohol or phenoxyethanol, and mixtures thereof.

[0311] The organic solvent is present in a proportion ranging preferably from 0.1% to 40% by weight, more preferably from 1% to 30% by weight, still more preferably from 1% to 25% by weight, relative to the total weight of composition (A) and / or (B) and / or (C).

[0312] Compositions (A) and / or (B) and / or (C) may be provided in liquid form, in the form of a slurry, in a thickened form (in particular a gel, cream, wax or paste), or in the form of a foam.

[0313] Compositions (A) and / or (B) and / or (C) may additionally comprise one or more further compounds chosen from nonionic, anionic, cationic or amphoteric surfactants, associative or nonassociative, cationic, anionic, nonionic or zwitterionic thickening polymers of natural or synthetic origin, silicone or non-silicone vegetable, mineral or synthetic oils in the form of oils, gums or resins, UV-screening agents, fillers such as pearlescent agents and metal oxides such as titanium dioxide, clays, fragrances, peptizers, vitamins and preservatives.

[0314] Additional features of the processing method

[0315] According to a preferred embodiment, the method according to the invention is a method for lightening keratin fibers.

[0316] Preferably, the keratin fibres treated according to the method of the invention are dark keratin fibres.

[0317] The term "dark keratin fibers" is understood to mean keratin fibers the depth of which is less than or equal to 6 (dark blond), preferably less than or equal to 4 (chestnut).

[0318] The process according to the invention makes it possible to obtain a lightening of keratin fibres, characterized in that the value of b* is lower, preferably 10% lower, more preferably 15% lower than the value of b* measured at the same intensity level L* on keratin fibres lightened with a composition comprising one or more persulfates, the values ​​of b* and L* being measured in the CIE L*a*b* system.

[0319] Preferably, the values ​​of b* and L* are measured according to the color evaluation method described in the Examples.

[0320] Step a)

[0321] During step a), composition (A) is applied to dry or moistened keratin fibres, preferably to dry keratin fibres.

[0322] The composition (A) is applied to the keratin fibres in an amount preferably ranging from 0.1 g to 20 g, more preferably ranging from 0.5 g to 10 g of composition (A) per gram of keratin fibres.

[0323] The composition (A) is left on the keratin fibres for a period of time preferably ranging from 30 seconds to 30 minutes. For example, the composition (A) is left on the keratin fibres for 5 minutes.

[0324] The working temperature of step a) is conveniently between ambient temperature (15 to 25°C) and 70°C.

[0325] According to a preferred embodiment, step a) is carried out at ambient temperature (15°C to 25°C).

[0326] The composition (A) may remain on the fibers under a closing system. As non-limiting examples of closing systems, mention may be made of closing systems of the wrapper type or of the hair cover type, made of aluminum or plastic film, with or without holes.

[0327] After step a), the keratin fibers are optionally rinsed with water, or optionally washed with a shampoo and then rinsed with water, before optionally drying or leaving to dry naturally.

[0328] The drying step can be done using absorbent paper, a hair dryer or a styling hood.

[0329] Preferably, after step a), the keratin fibres are neither rinsed with water nor washed with shampoo.

[0330] Preferably, after step a), the keratin fibers are dried or left to dry naturally.

[0331] During implementation of the method according to the invention, step a) may be repeated several times.

[0332] Step b)

[0333] The composition (B) is applied to the keratin fibres in an amount preferably ranging from 0.1 g to 20 g of composition per gram of keratin fibres.

[0334] The composition (B) is left on the keratin fibres for a period of time preferably ranging from 1 minute to 1 hour, more preferably ranging from 5 minutes to 60 minutes. For example, the composition (B) is left on the keratin fibres for 50 minutes.

[0335] The working temperature of step b) is conventionally from ambient temperature (at 15 to 25°C) to 80°C, preferably from ambient temperature to 60°C.

[0336] According to a preferred embodiment, step b) is carried out at 33°C.

[0337] The composition (B) may remain on the fibers under a closing system. As non-limiting examples of closing systems, mention may be made of closing systems of the wrapper type or of the hair cover type, made of aluminum or plastic film, with or without holes.

[0338] After step b), the keratin fibers are optionally rinsed with water, or optionally washed with a shampoo and then rinsed with water, before optionally drying or leaving to dry naturally.

[0339] The drying step can be done using absorbent paper, a hair dryer or a styling hood.

[0340] The composition (B) used in the process according to the invention is preferably prepared by mixing at least two compositions. Preferably, the mixing of the at least two compositions is carried out extemporaneously before applying the compositions to the keratin fibres.

[0341] According to a preferred embodiment, the composition (B) is produced by mixing:

[0342] ■ A composition (B1) comprising:

[0343] - one or more chemical oxidizing agents as defined above, selected from hydrogen peroxide, hydrogen peroxide generating systems other than peroxide salts, and mixtures thereof, preferably hydrogen peroxide; and

[0344] ■ A composition (B2) comprising:

[0345] - one or more compounds selected from carbonates, carbonate generating systems, bicarbonates, bicarbonate generating systems and mixtures thereof as defined above, preferably selected from carbonates, bicarbonates and mixtures thereof as defined above; and

[0346] - one or more silicates as defined above; and

[0347] - optionally one or more colorants, preferably selected from direct dyes, oxidation dyes and mixtures thereof; and

[0348] ■Optionally a composition (B3) comprising:

[0349] - One or more colorants, preferably selected from direct dyes, oxidation dyes and mixtures thereof.

[0350] According to a preferred embodiment, the method according to the invention is a method for lightening keratin fibers, wherein composition (B) results from mixing:

[0351] ■ A composition (B1) comprising:

[0352] - one or more chemical oxidizing agents as defined above, selected from hydrogen peroxide, hydrogen peroxide generating systems other than peroxide salts, and mixtures thereof, preferably hydrogen peroxide; and

[0353] ■ A composition (B2) comprising:

[0354] - one or more compounds selected from carbonates, carbonate generating systems, bicarbonates, bicarbonate generating systems and mixtures thereof as defined above, preferably selected from carbonates, bicarbonates and mixtures thereof as defined above; and

[0355] - One or more silicates as defined above.

[0356] According to another preferred embodiment, the process according to the invention is a process for the simultaneous bleaching and dyeing of keratin fibers, wherein composition (B) results from mixing:

[0357] ■ A composition (B1) comprising:

[0358] - one or more chemical oxidizing agents as defined above, selected from hydrogen peroxide, hydrogen peroxide generating systems other than peroxide salts, and mixtures thereof, preferably hydrogen peroxide; and

[0359] ■ A composition (B2) comprising:

[0360] - one or more compounds selected from carbonates, carbonate generating systems, bicarbonates, bicarbonate generating systems and mixtures thereof as defined above, preferably selected from carbonates, bicarbonates and mixtures thereof as defined above; and

[0361] - one or more silicates as defined above; and

[0362] - One or more colorants, preferably selected from direct dyes, oxidation dyes and mixtures thereof.

[0363] According to another preferred embodiment, the process according to the invention is a process for the simultaneous bleaching and dyeing of keratin fibers, wherein composition (B) results from mixing:

[0364] ■ A composition (B1) comprising:

[0365] - one or more chemical oxidizing agents as defined above, selected from hydrogen peroxide, hydrogen peroxide generating systems other than peroxide salts, and mixtures thereof, preferably hydrogen peroxide; and

[0366] ■ A composition (B2) comprising:

[0367] - one or more compounds selected from carbonates, carbonate generating systems, bicarbonates, bicarbonate generating systems and mixtures thereof as defined above, preferably selected from carbonates, bicarbonates and mixtures thereof as defined above; and

[0368] - one or more silicates as defined above; and

[0369] ■ A composition (B3) comprising one or more colorants, preferably chosen from direct dyes, oxidation dyes and mixtures thereof.

[0370] Preferably, at least one of the compositions (B1) or (B2) or at least one of the three compositions (B1) or (B2) or (B3) is aqueous. More preferably, composition (B1) is aqueous.

[0371] According to a specific embodiment, the composition (B2) is anhydrous.

[0372] According to a specific embodiment, composition (B1 ) is aqueous, composition (B2) is anhydrous and composition (B3) (when present) is aqueous.

[0373] The term "aqueous composition" is understood to mean a composition comprising at least 2% by weight of water, preferably at least 5% by weight of water, more preferably at least 10% by weight of water and still more advantageously more than 20% by weight of water.

[0374] The term "anhydrous composition" is understood to mean a composition containing less than 2% by weight of water, preferably less than 0.5% by weight of water, more preferably no water. Where appropriate, such small amounts of water can be introduced in particular via composition ingredients which may contain residual amounts of water.

[0375] Step c)

[0376] During step c), composition (C) is applied to the dry or moistened keratin fibres, preferably to moistened keratin fibres.

[0377] The composition (C) is applied to the keratin fibres in an amount preferably ranging from 0.01 g to 5 g, more preferably ranging from 0.05 g to 5 g of composition (C) per gram of keratin fibres.

[0378] The composition (C) is left on the keratin fibres for a period of time preferably ranging from 30 seconds to 30 minutes, more preferably ranging from 2 minutes to 10 minutes.

[0379] The working temperature of step c) is conventionally between ambient temperature (15 to 25°C) and 70°C.

[0380] According to a preferred embodiment, step c) is performed at ambient temperature (15°C to 25°C).

[0381] The composition (C) may remain on the fibers under a closing system. As non-limiting examples of closing systems, mention may be made of closing systems of the wrapper type or of the hair cover type, made of aluminum or plastic film, with or without holes.

[0382] After step c), the keratin fibers are optionally rinsed with water, or optionally washed with a shampoo and then rinsed with water, before optionally drying or leaving to dry naturally.

[0383] The drying step can be done using absorbent paper, a hair dryer or a styling hood.

[0384] Preferably, the keratin fibers are rinsed with water after step a).

[0385] During the implementation of the method according to the invention, step c) can be repeated several times. For example, step c) can be repeated 1 to 5 times, preferably with a drying step between each application of composition (C).

[0386] According to one embodiment, composition (C) is provided in the form of a shampoo. According to this embodiment, after step c), the keratin fibers are preferably rinsed with water and optionally treated with a conditioner, lotion or mask type composition before optionally drying or leaving to dry naturally.

[0387] According to another preferred embodiment, composition (C) is in the form of a hair conditioning composition, for example, a conditioner, a lotion or a hair mask.

[0388] According to this further embodiment, the method comprises between steps b) and c) a step of washing the keratin fibers with a shampoo followed by rinsing with water. According to this further embodiment, after step c), the keratin fibers are preferably rinsed with water before optionally drying or air drying.

[0389] Composition (B)

[0390] According to a second aspect, a subject of the present invention is a composition (B) as defined above, comprising one or more compounds chosen from chitosan, vitamin B, vitamin C, vanillin, their salts, their solvates and mixtures thereof, preferably chosen from chitosan, vitamin B, their salts, their solvates and mixtures thereof.

[0391] The compound selected from chitosan, vitamin B, vitamin C, vanillin, salts thereof, solvates thereof and mixtures thereof is present in composition (B) in a total content by weight preferably in the range of 1% to 20% by weight, more preferably in the range of 2% to 15% by weight, still more preferably in the range of 2% to 12% by weight, relative to the total weight of composition (B).

[0392] use

[0393] According to a third aspect, a subject of the invention is the use of a composition (A) and / or (C) as defined above for reducing damage to keratin fibres treated by a method for treating keratin fibres with a composition (B) as defined above.

[0394] According to a preferred embodiment, a subject of the invention is the use of compositions (A) and / or (C) as defined above for protecting and / or repairing keratin fibers treated by a method for treating keratin fibers with composition (B) as defined above.

[0395] According to a more preferred embodiment, a subject of the invention is the use of composition (A) and / or (C) as defined above for reducing the breakage of keratin fibers treated by a method for treating keratin fibers with composition (B) as defined above.

[0396] Multi-compartment device (kit)

[0397] According to a fourth aspect, the subject of the invention is a multi-compartment device (kit) comprising:

[0398] ■ A first compartment containing a composition (B1) comprising:

[0399] - one or more chemical oxidizing agents as defined above, selected from hydrogen peroxide, hydrogen peroxide generating systems other than peroxide salts, and mixtures thereof, preferably hydrogen peroxide; and

[0400] ■ A second compartment containing a composition (B2) comprising:

[0401] - one or more compounds selected from carbonates, carbonate generating systems, bicarbonates, bicarbonate generating systems and mixtures thereof as defined above, preferably selected from carbonates, bicarbonates and mixtures thereof as defined above; and

[0402] - one or more silicates as defined above; and

[0403] - optionally one or more colorants, preferably selected from direct dyes, oxidation dyes and mixtures thereof; and

[0404] - optionally one or more compounds D as defined above; and

[0405] ■ a third compartment containing a composition (A) or (C) as defined above, which composition (A) or (C) can optionally comprise one or more colorants, preferably chosen from direct dyes, oxidative dyes and mixtures thereof; and

[0406] ■ A fourth compartment optionally containing a composition (B3) comprising one or more colorants, preferably chosen from direct dyes, oxidative dyes and mixtures thereof.

[0407] According to a specific embodiment, the multi-compartment device (kit) comprises:

[0408] ■ A first compartment containing a composition (B1) comprising:

[0409] - one or more chemical oxidizing agents as defined above, selected from hydrogen peroxide, hydrogen peroxide generating systems other than peroxide salts, and mixtures thereof, preferably hydrogen peroxide; and

[0410] ■ A second compartment containing a composition (B2) comprising:

[0411] - one or more compounds selected from carbonates, carbonate generating systems, bicarbonates, bicarbonate generating systems and mixtures thereof as defined above, preferably selected from carbonates, bicarbonates and mixtures thereof as defined above; and

[0412] - one or more silicates as defined above; and

[0413] - optionally one or more colorants, preferably selected from direct dyes, oxidation dyes and mixtures thereof; and

[0414] - optionally one or more compounds D as defined above; and

[0415] ■ a third compartment containing a composition (A) as defined above, which composition (A) can optionally comprise one or more colorants, preferably chosen from direct dyes, oxidative dyes and mixtures thereof; and

[0416] ■ a fourth compartment containing a composition (C) as defined above, which composition (C) can optionally comprise one or more colorants, preferably chosen from direct dyes, oxidative dyes and mixtures thereof; and

[0417] ■ A fifth compartment optionally containing a composition (B3) comprising one or more colorants, preferably chosen from direct dyes, oxidative dyes and mixtures thereof.

[0418] Examples

[0419] The following examples enable a better understanding of the invention without however exhibiting a limiting nature.In the following examples, all amounts are shown as percentages by weight relative to the total weight of the composition, unless otherwise indicated.

[0420] Examples 1 to 14 and 14a: Process for treating keratin fibers with a pretreatment step a)

[0421] The following pretreatment compositions A1 to A9 and also bleaching compositions Bu to Bz were prepared, then applied according to the application protocol described below and evaluated according to the evaluation protocol described below:

[0422] Pretreatment composition

[0423] [Table 1]

[0424]

[0425] Pretreatment composition

[0426] [Table 2]

[0427]

[0428] Bleaching composition

[0429] [Table 3]

[0430]

[0431]

[0432] [Table 4]

[0433]

[0434] Administration regimen

[0435] Step a): Pretreatment

[0436] Compositions A1 to A9 are applied to tresses of HT4 Caucasian type hair according to the bath ratios (g composition / g hair) indicated in the table below. The hair is massaged with the fingers, making circular movements (5 times) along the entire length of the tresses, and then the tresses are left for 5 minutes. The tresses are subsequently wrung out of water and then dried with a hair dryer.

[0437] Step b): Bleaching

[0438] Composition B u To B zThe composition is applied to the hair tresses treated during step a) according to the bath ratios (g composition / g hair) indicated in the table below. The tresses are then placed on a hot plate at 33° C. (a temperature representative of the temperature of a single hair on the head) for 25 minutes, then turned over and placed on the hot plate for another 25 minutes. The tresses are then rinsed with tap water for 30 seconds, the water is wrung out, shampooed with DOP shampoo, the water is wrung out and then dried with a hair dryer.

[0439] The tresses were then evaluated for color and integrity according to the evaluation protocol described below.

[0440] Bath ratio

[0441] [Table 5]

[0442]

[0443] Color evaluation method

[0444] The color of the hair tresses was evaluated according to the CIE L*a*b* system using a Minolta spectrophotometer CM2600D colorimeter (illuminant D65).

[0445] In this L*a*b* system, L* represents the intensity of the color, a* indicates the chromaticity of the color on the green / red axis, and b* indicates the chromaticity of the color on the blue / yellow axis. The higher the value of L*, the lighter the color. The higher the value of a*, the redder the color, and the higher the value of b*, the yellower the color.

[0446] Methods for assessing the integrity of individual hairs

[0447] This test involves pulling on a wet, single strand of hair to see if it breaks, deforms irreversibly, or deforms and then returns to its original shape and length. Hairstylists often use this test to assess the integrity of their clients' hair. The test involves taking 6 hair fibers, soaking them in water for 30 seconds, then holding them in both hands, spreading the fingers and thumb of each hand so that there are 3 cm of fiber between the hands, and then pulling so that the fiber deforms another 1 cm. The fiber is held for 3 seconds, then the tension is gently released. The fiber is laid horizontally on a white paper for 5 minutes to dry, and then evaluated.

[0448] In the laboratory, a ruler was used to ensure that the distance was adhered to. The test was repeated 5 times, ie a total of 30 fibers.

[0449] The integrity of individual hairs is classified using the following criteria:

[0450] If the sum of broken and irreversibly deformed fibers is equal to or greater than 10, the individual hair has very poor integrity.

[0451] If the sum of broken and irreversibly deformed fibers is from 6 to 9 (inclusive), the individual hair has poor integrity.

[0452] If the sum of broken and irreversibly deformed fibers is between 2 and 5 (inclusive), the integrity of an individual hair is good.

[0453] If the sum of broken and irreversibly deformed fibers is 1 or less, the integrity of a single hair is very good.

[0454] Colorimetric measurement

[0455] The colorimetric measurement results are summarized in the following table:

[0456] [Table 6]

[0457]

[0458]

[0459] The method according to the invention makes it possible to obtain a colour chromaticity characterized by a relatively low b* value and therefore a less yellow and more natural result.

[0460] Measurement of the integrity of individual hairs

[0461] The results of the integrity measurements are summarized in the following table:

[0462] [Table 7]

[0463]

[0464]

[0465] The method according to the invention respects the integrity of the fibres and makes it possible to protect the hair, in particular from breakage or deformation.

[0466] Examples 15 to 25: Process for treating keratin fibers with a post-treatment step b)

[0467] The following post-treatment compositions C1 to C11 and also the bleaching compositions B described in Examples 1 to 14 and 14a were prepared: v , and then applied according to the application protocol described below and evaluated according to the color evaluation protocol described in Examples 1 to 14 and 14a and according to the evaluation protocol described below. Composition C11 was also evaluated according to the method for evaluating the integrity of a single hair as described in Examples 1 to 14 and 14a.

[0468] [Table 8]

[0469]

[0470]

[0471] [Table 9]

[0472]

[0473] [Table 10]

[0474]

[0475]

[0476] Administration regimen

[0477] Step b): Bleaching

[0478] The bleaching composition B v Application is made to 11 tresses of HT4 Caucasian type hair according to a bath ratio equal to 10 (g composition / g hair).

[0479] The tresses were then placed on a hot plate at 33°C (a temperature representative of the temperature of a single hair on the head) for 25 minutes, then turned over and placed on the hot plate for another 25 minutes. The tresses were then rinsed with tap water for 30 seconds, wrung out, shampooed with DOP shampoo and then wrung out.

[0480] Step c): Post-processing

[0481] Compositions C1 to C11 are then applied to 11 hair tresses treated during step b) according to a bath ratio (g composition / g hair) equal to 2. The hair is massaged with the fingers, making circular movements (5 times) along the entire length of the tresses, and the tresses are then left for 5 minutes. The tresses are then rinsed with tap water for 30 seconds, the water is wrung out and then dried at 60°C.

[0482] The application of compositions C1 to C11 was repeated 4 more times for a total of 5 applications.

[0483] Method for evaluating hair fiber repair by differential scanning calorimetry

[0484] The differential scanning calorimetry technique is a method known to those skilled in the art that is able to quantify the strengthening of proteins in the cortex of keratin fibers (Kinetics of the changes imparted to the main structural components of human hair by thermal treatment, https: / / doi.org / 10.1016 / j.tca.2018.01.014 & F.-J. Wortmann and H. Deutz, J. Appl. Polym. Sci., 48, 137 (1993). The principle of the test is to measure the denaturation temperature of the protein. It is generally believed that the higher the protein denaturation temperature, the better the integrity of the cortical proteins, which reflects a reduction in fiber breakage.

[0485] The denaturation temperature is directly related to the binding density of keratin present in the cortex. Therefore, the lower the denaturation temperature, the lower the binding density of proteins to each other, the disulfide bonds are broken and the cortex is damaged. A difference of 2°C is considered by those skilled in the art to be a significant change.

[0486] The instrument used for the measurements is a DSC2500 reference instrument from TA Instruments (temperature range: 30°C-200°C; heating gradient 5°C / min). The instrument measures the energy flow during heating of the sample. The temperature at which the energy flow is at its maximum represents the denaturation temperature.

[0487] Method for assessing hair weight loss

[0488] The hair tresses were placed in a glove box with controlled humidity RH 45% for 12 hours and then weighed at ambient temperature before processing.

[0489] After treatment, the dried tresses were placed back into the glove box with controlled humidity RH 45% for 12 h and then weighed again.

[0490] Therefore, the weight loss of each hair tress was calculated based on the weight values ​​before and after treatment.

[0491] The percentage of hair weight loss is expressed by the following equation:

[0492]

[0493] in:

[0494] w0: initial weight of the strand before processing

[0495] w1: weight of the tress after complete processing.

[0496] Colorimetric measurement

[0497] The colorimetric measurement results are summarized in the following table:

[0498] [Table 11]

[0499] Examples Post-treatment composition b* 15 C1 23.9 16 C2 23.5 17 C3 23.3 18 C4 22.9 19 C5 22.8 20 C6 23.2 21 C7 24.4 22 C8 21.9 23 C9 22.1 24 C10 24.5 25 C11 21.8

[0500] The method according to the invention makes it possible to obtain a colour chromaticity characterized by a relatively low b* value and therefore a less yellow and more natural result.

[0501] Measuring hair fiber repair by differential scanning calorimetry

[0502] The results of the measurements of the denaturation temperature of each hair tress are summarized in the table below and correspond to the average of the measurements carried out on 6 individual hairs.

[0503] [Table 12]

[0504]

[0505]

[0506] The method according to the invention respects the integrity of the fiber and makes it possible to repair the hair.

[0507] Measurement of Hair Weight Loss

[0508] The results of the hair weight loss measurements are summarized in the following table:

[0509] [Table 13]

[0510] Examples Post-treatment composition Hair weight loss 15 C1 0.0 16 C2 0.6 18 C4 0.4 20 C6 0.0 23 C9 0.5 25 C11 0.0

[0511] The method according to the invention respects the integrity of the fibers. The breakage of individual hairs is limited.

[0512] Measurement of the integrity of individual hairs

[0513] The results of the integrity measurements are summarized in the following table:

[0514] [Table 14]

[0515]

[0516] The method according to the invention respects the integrity of the fibres and makes it possible to protect the hair, in particular from breakage or deformation.

Claims

1. A method for treating keratin fibers, the method comprising the following step b) and also the following step a) and / or the following step c): a) applying to the keratin fibers a composition (A) comprising one or more compounds D chosen from organic acids, amino acids, chitosan, vitamin B, vitamin C, vanillin, salts thereof, solvates thereof and mixtures thereof, preferably chosen from organic acids, amino acids, chitosan, vitamin B, salts thereof, solvates thereof and mixtures thereof, said compounds D being present in said composition (A) in a total content by weight ranging from 1% to 20% by weight relative to the total weight of said composition (A); b) applying to the keratin fibers a composition (B) comprising: i) one or more chemical oxidants selected from hydrogen peroxide, hydrogen peroxide generating systems other than peroxide salts, and mixtures thereof; ii) one or more compounds selected from carbonates, carbonate generating systems, bicarbonates, bicarbonate generating systems and mixtures thereof, preferably selected from carbonates, bicarbonates and mixtures thereof; iii) one or more silicates; c) applying to said keratin fibres a composition (C) comprising one or more compounds D as defined above, said compounds D being present in said composition (C) in a total content by weight ranging from 1% to 25% by weight relative to the total weight of said composition (C); in: - when step a) is present, step a) is performed before step b); - when step c) is present, step c) is performed after step b); - the compositions (A) and (C) may be identical or different; - said composition (B) comprises a total content of persulfates of less than 10% by weight.

2. The method according to the preceding claim, wherein: - said compound D is present in said composition (A) in a total content by weight ranging from 3% to 20% by weight relative to the total weight of said composition (A); and / or - said compounds D are present in said composition (C) in a total content by weight ranging from 2% to 15% by weight relative to the total weight of said composition (C).

3. A method according to any one of the preceding claims, wherein: - The organic acid is selected from the compounds of the following formula (I): In formula (I): ■X represents a carbon atom or S=O or P-OH, preferably a carbon atom; ■A stands for -OR 4 Group or -CR 1 (R 2 ) p (R 3 ) group, it is understood that if X represents P-OH, then A represents -OR 4 Group; ■p = 0 or 1; ■R 1 Represents a hydrogen atom or a hydroxyl group (-OH) or -NR a -R c Group or -NR a -CO-R c Group; ■R 2 represents a hydrogen atom or a hydroxyl (-OH) or -X(O)OH group, wherein X is as defined above, in particular wherein X represents a carbon atom; ■R 3 represents a hydrogen atom or a hydroxyl group (-OH) or a (hetero)cyclic group which is optionally substituted by one or more identical or different groups selected from the following: (C1-C6)alkyl, in particular (C1-C4)alkyl such as methyl, alkylcarbonyl-(CO)-R c , alkylcarbonyloxy-O-CO-R c , alkoxycarbonyl-CO-OR c , -OH, (C1-C6)alkoxy, in particular (C1-C4)alkoxy such as methoxy, -X(O)OH, in which X is as defined above, in particular in which X represents a carbon atom, or -OX(O)OH, in which X is as defined above, or R 3 represents an alkyl or alkenyl group or an alkylamino group or an alkylamide group, wherein the alkyl or alkenyl group or an alkylamino group or an alkylamide group is: - optionally substituted by one or more identical or different groups selected from: -X(O)OH groups, wherein X is as defined above, in particular wherein X represents a carbon atom; hydroxyl (-OH) or a (hetero)cyclyl group; and / or - optionally interrupted by one or more heteroatoms or groups selected from: -O-, -NR a -, -S-, -CO-, or combinations thereof, such as -O-CO-, -(CO)-O-, -NR a -(CO)- or -(CO)-NR a -; R 1 and R 3 can form together with the carbon atoms carrying them a (hetero)cyclic group, which can be optionally substituted by one or more identical or different groups selected from the following: (C1-C6)alkyl, in particular (C1-C4)alkyl such as methyl, alkylcarbonyl-(CO)-R c , alkylcarbonyloxy-O-CO-R c , alkoxycarbonyl-CO-OR c , -OH, (C1-C6)alkoxy, in particular (C1-C4)alkoxy such as methoxy, -X(O)OH, wherein X is as defined above, in particular wherein X represents a carbon atom, or -OX(O)OH, wherein X is as defined above, in particular wherein X═P-OH; R 1 and R 3 can form a carbonyl group -CO- together with the carbon atom that carries them; ■R 4 represents a hydrogen atom or an alkyl or alkenyl or (hetero)cyclic radical, which may be optionally substituted by one or more identical or different radicals selected from: a -X(O)OH radical, wherein X is as defined above, in particular wherein X represents a carbon atom or P-OH; a hydroxyl (-OH) or (hetero)cyclic radical; ■R a represents a hydrogen atom or a (C1-C4)alkyl group optionally substituted by one or more -X(O)OH groups, wherein X is as defined above, in particular wherein X represents a carbon atom; ■R c represents an alkyl or alkenyl group or an alkylamino group or an alkylamide group, wherein the alkyl or alkenyl group or an alkylamino group or an alkylamide group is: - optionally substituted by one or more identical or different groups selected from: -X(O)OH groups, wherein X is as defined above, in particular wherein X represents a carbon atom; hydroxyl (-OH) or a (hetero)cyclyl group; and / or - optionally interrupted by one or more heteroatoms or groups selected from: -O-, -S-, -CO-, -O-CO-, -O-CO-, -NR a -(CO)- or -(CO)-NR a -; Preferably selected from the compounds of formula (I), wherein: ■X represents a carbon atom; ■A stands for -CR 1 (R 2 ) p (R 3 ) group; ■p＝1； ■R 1 represents a hydrogen atom or a hydroxyl group (-OH); ■R 2 represents a hydrogen atom or a hydroxyl (-OH) or -C(O)OH group; ■R 3 represents a hydrogen atom or a hydroxyl group (-OH) or an alkyl group or an alkenyl group or an alkylamino group or an alkylamide group, wherein the alkyl group or the alkenyl group or the alkylamino group or the alkylamide group is: - optionally substituted by one or more identical or different groups selected from: -C(O)OH group; hydroxyl (-OH) or (hetero)cyclyl; and / or - optionally interrupted by one or more heteroatoms or groups selected from: -O-, -NR a -, -S-, -CO-, or combinations thereof, such as -O-CO-, -(CO)-O-, -NR a -(CO)- or -(CO)-NR a -; ■R a represents a hydrogen atom or a (C1-C4)alkyl group which is optionally substituted by one or more -C(O)OH groups; More preferably, it is selected from levulinic acid, N,N-bis(carboxymethyl)glutamic acid, oleic acid, citric acid, lactic acid, maleic acid, succinic acid, glutaric acid, tartaric acid, adipic acid and mixtures thereof; still more preferably, it is selected from levulinic acid, N,N-bis(carboxymethyl)glutamic acid, oleic acid, citric acid and mixtures thereof; most preferably, it is selected from levulinic acid, N,N-bis(carboxymethyl)-L-glutamic acid, tetrasodium N,N-bis(carboxymethyl)-L-glutamate, oleic acid, citric acid and mixtures thereof; and / or - the amino acid is selected from the group consisting of glycine, proline, methionine, serine, arginine, lysine, carnitine, acetylcarnitine, propionylcarnitine, isovalerylcarnitine, taurine, hypotaurine, creatinine, carnosine, aspartame and mixtures thereof, preferably selected from the group consisting of glycine, proline, methionine, serine, arginine, lysine, carnitine and mixtures thereof, more preferably selected from the group consisting of glycine, arginine, carnitine and mixtures thereof, still more preferably selected from the group consisting of glycine, L-arginine and mixtures thereof; and / or - The vitamin B is selected from vitamin B1, vitamin B3, vitamin B6 and mixtures thereof, preferably selected from vitamin B1, vitamin B6 and mixtures thereof, more preferably selected from thiamine, pyridoxine, salts thereof and mixtures thereof.

4. A method according to any one of the preceding claims, wherein: The chemical oxidizing agent contained in the composition (B) is hydrogen peroxide.

5. A method according to any one of the preceding claims, wherein: The chemical oxidizing agent is present in the composition (B) in a total content ranging from 1% to 12% by weight, preferably ranging from 3% to 9% by weight, more preferably ranging from 3.5% to 8.5% by weight relative to the total weight of the composition (B).

6. A method according to any one of the preceding claims, wherein: The compound ii) is present in the composition (B) in a total content ranging from 0.01% to 20% by weight, preferably ranging from 1% to 15% by weight, more preferably ranging from 2% to 15% by weight, still more preferably ranging from 4% to 15% by weight, relative to the total weight of the composition (B).

7. A method according to any one of the preceding claims, wherein: The compound ii) is selected from carbonates, carbonate generating systems and mixtures thereof, preferably selected from carbonates.

8. A method according to any one of the preceding claims, wherein: The carbonate and / or the carbonate generating system is present in the composition (B) in a total content ranging from 0.01% to 20% by weight, preferably ranging from 1% to 20% by weight, more preferably ranging from 1% to 10% by weight, relative to the total weight of the composition (B).

9. A method according to any one of the preceding claims, wherein: The carbonate is selected from: - alkali metal carbonates; - Alkaline earth metal carbonates; - lanthanide carbonates; - transition metal carbonates; - bismuth carbonate; - cadmium carbonate; - thallium carbonate; - zinc carbonate; -Formula (N + R 1 R 2 R 3 R 4 )2CO3 2- A compound wherein R 1 , R 2 , R 3 and R 4 independently of one another represent a hydrogen atom or a (C1-C4)alkyl group which is optionally substituted by a hydroxyl group; -guanidine carbonate; - mixtures thereof; 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, more preferably 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, still more preferably selected from sodium carbonate, potassium carbonate, magnesium carbonate, calcium carbonate, ammonium carbonate and mixtures thereof; most preferably, the carbonate is ammonium carbonate.

10. A method according to any one of the preceding claims, wherein: The compound ii) is selected from bicarbonate, bicarbonate generating system and mixtures thereof, preferably selected from bicarbonate.

11. A method according to any one of the preceding claims, wherein: The bicarbonate salt and the bicarbonate generating system are present in the composition (B) in a total content ranging from 0.01% to 20% by weight, preferably ranging from 1% to 15% by weight, more preferably ranging from 2% to 15% by weight, still more preferably ranging from 4% to 15% by weight, relative to the total weight of the composition (B).

12. A method according to any one of the preceding claims, wherein: The bicarbonate is selected from: - alkali metal bicarbonates; - alkaline earth metal bicarbonates; -Formula N + R 1 R 2 R 3 R 4 HCO3 - A compound wherein R 1 , R 2 , R 3 and R 4 independently of one another represent a hydrogen atom or a (C1-C4)alkyl group which is optionally substituted by a hydroxyl group; -aminoguanidine bicarbonate; - mixtures thereof; Preferably, it 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; more preferably, it is selected from sodium bicarbonate, potassium bicarbonate, cesium bicarbonate, calcium bicarbonate, magnesium bicarbonate, ammonium bicarbonate and mixtures thereof, more preferably, it is selected from sodium bicarbonate, potassium bicarbonate, cesium bicarbonate, calcium bicarbonate, magnesium bicarbonate, ammonium bicarbonate and mixtures thereof, still more preferably, it is selected from sodium bicarbonate, potassium bicarbonate, ammonium bicarbonate and mixtures thereof; most preferably, the bicarbonate is ammonium bicarbonate.

13. A method according to any one of the preceding claims, wherein: The silicate is chosen from alkali metal silicates, alkaline earth metal silicates, aluminum silicates, trimethylammonium silicate and mixtures thereof, preferably from sodium silicate, potassium silicate, calcium silicate, aluminum silicate, trimethylammonium silicate and mixtures thereof, more preferably from sodium silicate, still more preferably from compounds with the INCI name sodium silicate and / or sodium metasilicate.

14. A method according to any one of the preceding claims, wherein: The silicate is present in the composition (B) in a total content ranging from 1% to 40% by weight, preferably ranging from 2% to 35% by weight, more preferably ranging from 3% to 35% by weight, still more preferably ranging from 4% to 20% by weight, relative to the total weight of the composition (B).

15. A method according to any one of the preceding claims, wherein: The weight ratio of the total amount of bicarbonate and / or bicarbonate generating system / the total amount of silicate in the composition (B) is 0.00025 to 20, preferably 0.02 to 7.5, more preferably 0.05 to 5.

16. A method according to any one of the preceding claims, wherein: The weight ratio of the total amount of bicarbonate and / or bicarbonate generating system / the total amount of chemical oxidizing agent in the composition (B) is from 0.0008 to 20, preferably from 0.11 to 5, more preferably from 0.2 to 4.

2.

17. A method according to any one of the preceding claims, wherein: The weight ratio of the total amount of carbonates and / or carbonate generating systems / the total amount of bicarbonates and / or bicarbonate generating systems in the composition (B) is 0.0005 to 2000, preferably 0.06 to 20, more preferably 0.06 to 5.

18. A method according to any one of the preceding claims, wherein: The composition (B) comprises a total content of magnesium carbonate of less than 5% by weight, preferably less than 1% by weight, more preferably less than 0.1% by weight, still more preferably less than 0.01% by weight, most preferably less than 0.001% by weight, and even better still the composition (B) contains no magnesium carbonate.

19. A method according to any one of the preceding claims, wherein: The composition (B) comprises a total content of persulfate of less than 5% by weight, preferably less than 1% by weight, more preferably less than 0.1% by weight, still more preferably less than 0.01% by weight, most preferably less than 0.001% by weight, and even better still the composition (B) is free of persulfate.

20. A method according to any one of the preceding claims, wherein: The pH of the composition (B) varies from 8 to 11, preferably from 8 to 10.5, more preferably from 8 to 10, still more preferably from 8.3 to 10.

21. A method according to any one of the preceding claims, wherein: The composition (B) comprises one or more colorants, preferably selected from direct dyes, oxidation dyes and mixtures thereof.

22. The method according to any one of claims 1 to 20, wherein: The composition (B) comprises a total content of colorants of less than 0.1% by weight, preferably less than 0.01% by weight, more preferably less than 0.001% by weight, relative to the total weight of the composition (B); more preferably still, the composition (B) contains no colorants.

23. A method according to any one of the preceding claims, wherein: The composition (B) comprises one or more compounds D as defined in any one of claims 1 to 3 .

24. A method according to any one of the preceding claims, wherein: The composition (B) as defined in any one of claims 1 or 4 to 23 is produced by mixing: ■ A composition (B1) comprising: - one or more chemical oxidizing agents as defined in claim 1 or 4, selected from hydrogen peroxide, hydrogen peroxide generating systems other than peroxide salts, and mixtures thereof; and ■ A composition (B2) comprising: - one or more compounds as defined in claim 1, 7, 9, 10 or 12 selected from carbonates, carbonate generating systems, bicarbonates, bicarbonate generating systems and mixtures thereof; and - one or more silicates as defined in claim 1 or 13; and - optionally one or more colorants, preferably selected from direct dyes, oxidation dyes and mixtures thereof; and ■Optionally a composition (B3) comprising: - One or more colorants, preferably selected from direct dyes, oxidation dyes and mixtures thereof.

25. A composition (B) as defined in any one of claims 1 or 4 to 24, comprising one or more compounds selected from the group consisting of chitosan, vitamin B, vitamin C, vanillin, salts thereof, solvates thereof and mixtures thereof, preferably selected from the group consisting of chitosan, vitamin B, salts thereof, solvates thereof and mixtures thereof.

26. Use of a composition (A) and / or (C) as defined in any one of claims 1 to 3 for reducing damage to keratin fibers treated by a method for treating keratin fibers using a composition (B) as defined in any one of claims 1 or 4 to 25, preferably for protecting and / or repairing keratin fibers treated by a method for treating keratin fibers using a composition (B) as defined in any one of claims 1 or 4 to 25, more preferably for reducing breakage of keratin fibers treated by a method for treating keratin fibers using a composition (B) as defined in any one of claims 1 or 4 to 25.

27. A multi-compartment device comprising: ■ a first compartment containing a composition (B1) as defined in claim 24; as well as ■ A second compartment containing a composition (B2) as defined in claim 24, said composition (B2) being able to comprise: - optionally one or more colorants, preferably selected from direct dyes, oxidation dyes and mixtures thereof; and - optionally one or more compounds D as defined in claim 1 or 3; and ■ a third compartment containing a composition (A) or (C) as defined in any one of claims 1 to 3, said composition (A) or (C) optionally comprising one or more colorants, said colorants preferably being chosen from direct dyes, oxidative dyes and mixtures thereof; and ■ A fourth compartment optionally containing a composition (B3) comprising one or more colorants, preferably chosen from direct dyes, oxidative dyes and mixtures thereof.

Images