Process for treating hair keratin fibers comprising a step of dyeing the hair keratin fibers by a dyeing composition and a step of removing the colour of said dyed hair keratin fibers comprising the application of a specific composition

Abstract

The present invention relates to a process for treating hair keratin fibers comprising : - a step of dyeing the hair keratin fibers by applying a particular dyeing composition; and - a step of removing the colour from said dyed hair keratin fibers by applying a specific colour-removing composition.

Description

[0001] DESCRIPTION

[0002] TITLE: Process for treating hair keratin fibers comprising a step of dyeing the hair keratin fibers by a dyeing composition and a step of removing the colour of said dyed hair keratin fibers comprising the application of a specific composition

[0003] The present invention relates to a process for treating hair keratin fibers comprising a step of dyeing the hair keratin fibers by applying a composition comprising a (poly)carbodiimide compound, a pigment and a polymer comprising at least one reactive group chosen from the carboxylic acids, to obtain dyed hair keratin fibers; and a step of removing the colour from said dyed hair keratin fibers by applying a colour-removing composition comprising an alkyl or alkylene carbonate and a fatty acid.

[0004] Technical field

[0005] In the field of dyeing the hair keratin fibers, in particular human hair keratin fibers, it is already known practice to dye the hair keratin fibers via various techniques using direct dyes or pigments for non-permanent dyeing, or dye precursors for permanent dyeing.

[0006] There are essentially three types of process for dyeing the hair keratin fibers: a) “permanent” dyeing, the function of which is to afford a substantial modification to the natural colour and which uses oxidation dyes which penetrate into the hair keratin fibers and form the dye via an oxidative condensation process; b) non-permanent, semi-permanent or direct dyeing, which does not use the oxidative condensation process and withstands four or five shampoo washes; it consists in dyeing hair keratin fibers with dye compositions containing direct dyes; c) temporary dyeing, which gives rise to a modification of the natural colour of the head of hair keratin fibers which lasts from one shampoo wash to the next, and which serves to enhance or correct a shade that has already been obtained. It may also be likened to a “makeup” process.

[0007] Another dyeing method consists in using pigments. Specifically, the use of pigments on the surface of the hair keratin fibers generally makes it possible to obtain colourings that are visible on dark hair keratin fibers, since the surface pigment masks the natural colour of the fibre.

[0008] This dyeing method may also make it possible to provide dye compositions which have the advantage of producing a uniform coloured coating on the hair keratin fibers, while at the same time forming a coating that is persistent with respect to shampoo washing and to the various attacking factors to which the hair keratin fibers may be subjected such as brushing and / or rubbing, without degradation of the hair keratin fibers.

[0009] However, there are no processes for removing colour from hair keratin fibers previously dyed with pigments using colour-removing compositions and, optionally, tools, in an efficient manner with this type of temporary dye composition that is persistent with respect to shampoo washing.

[0010] A need thus remains for a process for efficiently removing colour from hair keratin fibers which have been previously dyed using said dye compositions that are persistent with respect to shampoo washing.

[0011] Thus, the aim of the present invention is to develop a process for efficiently removing colour from the hair keratin fibers.

[0012] Disclosure of the invention

[0013] One subject of the present invention is thus a process for treating hair keratin fibers comprising :

[0014] - a step of dyeing the hair keratin fibers by applying a composition comprising at least one (poly)carbodiimide compound, at least one pigment and at least one polymer comprising at least one reactive group chosen from the carboxylic acids, to obtain dyed hair keratin fibers; and

[0015] - a step of removing the colour from said dyed hair keratin fibers by applying a colour-removing composition comprising at least one alkyl or alkylene carbonate and at least one fatty acid. and then, optionally:

[0016] - a step of applying to said hair keratin fibers tongs comprising two arms A and B between which said hair keratin fibers pass, each arm A and B comprising a supporting part and an active part, said arms A and B being movable between a spaced-apart position in which the active parts are at a distance from each other, and a brought-together position in which the active parts are brought towards each other, said active parts comprising an active face and an opposite face, said active face having bristles, in which, when the active parts are close together, said bristles of arms A and B interpenetrate so as to grip said hair keratin fibers without blocking it.

[0017] The combination of a colour-removing composition comprising at least one alkyl or alkylene carbonate and at least one fatty acid, and optionally tongs as described previously, enables colour to be efficiently removed from hair keratin fibers previously dyed with the dye composition as described previously.

[0018] The term “at least one1’ means one or more. Unless otherwise indicated, the limits of a range of values are included in that range, notably in the expressions “between” and “ranging from ... to ...”.

[0019] The invention is not limited to the examples illustrated. The characteristics of the various examples may notably be combined within variants which are not illustrated.

[0020] For the purposes of the present invention and unless otherwise indicated:

[0021] - an “alkyF radical denotes a linear or branched saturated radical containing, for example, from 1 to 20 carbon atoms;

[0022] - an “ aminoalky / ” radical denotes an alkyl radical as defined previously, said alkyl radical comprising an NH2 group;

[0023] - a “hydroxyalkyF radical denotes an alkyl radical as defined previously, said alkyl radical comprising an OH group;

[0024] - an “alkylene” radical denotes a linear or branched divalent saturated C2-C4 hydrocarbon-based group such as methylene, ethylene or propylene;

[0025] - a “cycloalkyF or “alicy cloalkyF radical denotes a saturated monocyclic or polycyclic, preferably monocyclic, cyclic hydrocarbon-based group comprising from 1 to 3 rings, preferably 2 rings, and comprising from 3 to 24 carbon atoms, in particular comprising from 3 to 20 carbon atoms, more particularly from 3 to 13 carbon atoms, even more particularly from 3 to 12 carbon atoms, preferably between 5 and 10 carbon atoms, such as cyclopropyl, cyclopentyl, cyclohexyl, cycloheptyl or norbornyl, in particular cyclopropyl, cyclopentyl or cyclohexyl, it being understood that the cycloalkyl radical may be substituted with one or more (Ci-C4)alkyl groups such as methyl; preferably, the cycloalkyl radical is then an isobornyl group;

[0026] - a “cycloalkylene” radical denotes a divalent cycloalkyl group with “cycloalkyF as defined previously, preferably of C3-C12;

[0027] - an “aryF radical is a monocyclic, bicyclic or tricyclic, fused or non-fused, unsaturated and aromatic hydrocarbon-based cyclic radical, comprising from 6 to 14 carbon atoms, preferably between 6 and 12 carbon atoms; preferably, the aryl group comprises 1 ring of 6 carbon atoms such as phenyl, naphthyl, anthryl, phenanthryl and biphenyl, it being understood that the aryl radical may be substituted with one or more (Ci-C4)alkyl groups such as methyl, preferably tolyl, xylyl, or methylnaphthyl; preferably, the aryl group represents phenyl;

[0028] - an “arylene” radical is a divalent aryl radical with “aryF as defined previously; preferably, arylene represents phenylene;

[0029] - a “heterocyclic” radical denotes a saturated or unsaturated, non-aromatic or aromatic, monocyclic or polycyclic hydrocarbon-based radical, comprising one or more heteroatoms, preferably from 1 to 5 atoms chosen from O, S or N, including from 3 to 20 ring members, preferably between 5 and 10 ring members, such as imidazolyl, pyrrolyl and furanyl;

[0030] - a “helerocycloalkylene" radical is a divalent heterocyclic group with ''heterocyclic" as defined previously;

[0031] - an “aryloxy” radical denotes an aryl-oxy radical with “aryl” as defined previously;

[0032] - an “alkoxy” radical denotes an alkyl-oxy radical with “alkyl” as defined previously;

[0033] - an “acyloxy” radical denotes an ester radical R-C(O)-O- with R being an alkyl group as defined previously;

[0034] - a “reactive” group is a group that is capable of forming a covalent bond with another identical or different group, by chemical reaction.

[0035] Unless otherwise indicated, when compounds are mentioned in the present patent application, this also includes the optical isomers thereof, the geometrical isomers thereof, the tautomers thereof or the salts thereof, alone or as a mixture.

[0036] The term “hair keratin fibres” means the keratin hair fibers or the hair. In other words, the expressions “hair keratin fibres”, “keratin hair fibers” and “hair” are equivalent in the continuation of the description.

[0037] For the purposes of the present invention, the term “hair keratin fibers” means hair keratin fibers of the head. This term does not correspond to bodily keratin hairs fibers, the eyebrows or the eyelashes.

[0038] Dyeing composition

[0039] As indicated previously, the hair keratin fibers treatment process comprises a step of dyeing the hair keratin fibers, comprising the application to said hair keratin fibers of at least one composition comprising at least one (poly)carbodiimide compound, at least one pigment and at least one polymer comprising at least one reactive group chosen from the carboxylic acids, to obtain dyed hair keratin fibers.

[0040] (Poly)carbodiimide compound

[0041] As indicated previously, the hair keratin fibers dye composition used in the context of the process according to the invention comprises at least one (poly)carbodiimide compound.

[0042] The composition may comprise at least two different (poly)carbodiimide compounds, present as a mixture in the composition.

[0043] The term “ (poly) carbodiimide compound” means a compound comprising one or more carbodiimide groups, preferably at least two carbodiimide groups, more preferentially at least three carbodiimide groups; in particular, the number of carbodiimide groups does not exceed 200, preferably 150, more preferentially 100.

[0044] The term "carbodiimide group" means a divalent linear triatomic fraction of general formula -(N=C=N)-.

[0045] The (poly)carbodiimide compound(s) according to the invention may optionally comprise in their structure one or more reactive groups different from carbodiimide groups, chosen from alkoxysilyl, hydroxysilyl, acetoxysilyl, vinylsilyl, acrylalkylsilyl, methacrylalkylsilyl, crotonylalkylsilyl, carboxyanhydridoalkylsilyl, carboxyalkylsilyl, hydroxy alkyl silyl, aldehydoalkylsilyl, mercaptoalkylsilyl, norbornenyl silyl, acylpentadienylalkylsilyl, maleimidoalkylsilyl, sulfonylalkylsilyl, (meth)acrylalkyl, crotonylalkyl, alkylepoxide such as propylepoxide or butylepoxide and azacyclopropane groups.

[0046] The reactive group(s) other than the carbodiimide groups may be side or end groups. Preferably, the (poly)carbodiimide compound(s) comprise one or more end groups different from carbodiimide groups, preferably one or more end groups chosen from alkoxysilyl, hydroxysilyl, acetoxysilyl, vinylsilyl, acrylalkylsilyl, methacrylalkylsilyl, crotonylalkylsilyl, carboxyanhydridoalkylsilyl, carboxyalkylsilyl, hydroxy alkyl silyl, aldehydoalkylsilyl, mercaptoalkyl silyl, norbornenylsilyl, acylpentadienylalkylsilyl, maleimidoalkylsilyl, sulfonylalkylsilyl, (meth)acrylalkyl, crotonylalkyl, alkylepoxide such as propylepoxide or butylepoxide and azacyclopropane groups.

[0047] According to a particular embodiment, the (poly)carbodiimide compound is chosen from the compounds of formula (I) below:

[0048] (I), in which:

[0049] - Xi and X2 independently represent an oxygen atom O, a sulfur atom S or an NH group;

[0050] - Ri and R2 independently represent a group chosen from a hydrocarbon-based radical, preferably alkyl, optionally interrupted with one or more heteroatoms, a group chosen from alkoxysilyl, hydroxysilyl, acetoxysilyl, vinylsilyl, acrylalkylsilyl, methacrylalkylsilyl, crotonylalkylsilyl, carboxyanhydridoalkylsilyl, carboxyalkylsilyl, hydroxy alkyl silyl, aldehydoalkylsilyl, mercaptoalkyl silyl, norbornenylsilyl, acylpentadienylalkylsilyl, maleimidoalkylsilyl, sulfonylalkylsilyl, (meth)acrylalkyl, crotonylalkyl, alkylepoxide such as propylepoxide or butylepoxide and azacyclopropane groups, and a hydrocarbon-based radical, preferably alkyl, optionally interrupted with one or more heteroatoms and with one or more groups chosen from alkoxysilyl, hydroxysilyl, acetoxysilyl, vinylsilyl, acrylalkylsilyl, methacrylalkylsilyl, crotonylalkylsilyl, carboxyanhydridoalkylsilyl, carboxyalkylsilyl, hydroxyalkylsilyl, aldehydoalkylsilyl, mercaptoalkyl silyl, norbornenylsilyl, acylpentadienylalkylsilyl, maleimidoalkylsilyl, sulfonylalkylsilyl, (meth)acrylalkyl, crotonylalkyl, alkylepoxide such as propylepoxide or butylepoxide and azacyclopropane groups;

[0051] - n denotes an integer ranging from 1 to 1000; and

[0052] - A is a monomer chosen from the compounds below:

[0053] According to another embodiment, the (poly)carbodiimide compound is chosen from the compounds of formula (I’) below:

[0054] (I ), in which: - Xi and X2 independently represent an oxygen atom O, a sulfur atom S or an

[0055] NH group;

[0056] - Yi and Y2 independently represent a divalent organic radical chosen from a saturated Ci to C36 aliphatic group or a Ce to C24 aromatic or alkylaromatic group, the aliphatic or aromatic group optionally comprising one or more non-pendent heteroatoms, such as a nitrogen atom, an oxygen atom, a sulfur atom, or combinations thereof;

[0057] - Zi and Z2 independently represent a reactive end group or an inert end group;

[0058] - as inert end group, Zi and Z2 may represent, independently, a saturated, linear or branched or cyclic Ci to C50 aliphatic group, or a Ce to Cis aromatic group, said aliphatic and aromatic groups optionally comprising from 1 to 10 heteroatoms chosen from nitrogen, oxygen, sulfur and combinations thereof, and the aliphatic or aromatic group may be partially or totally fluorinated; in this variant, Zi and Z2 comprise a bonding group CG connecting Zi to Yi and Z2 to Y2, the group CG possibly being a single covalent bond, a saturated C-C bond, an unsaturated covalent C-C bond, an amide group, an ester group, a carbonate group, a thioester group, an ether group, a urethane group, a thiourethane group or a urea group;

[0059] - as reactive end group, Zi and Z2 may be chosen from alkoxysilyl, hydroxysilyl, acetoxysilyl, vinylsilyl, acrylalkyl silyl, methacrylalkylsilyl, crotonylalkylsilyl, carboxyanhydridoalkylsilyl, carboxyalkylsilyl, hydroxyalkylsilyl, aldehydoalkylsilyl, mercaptoalkyl silyl, norbornenylsilyl, acylpentadienylalkylsilyl, maleimidoalkylsilyl, sulfonylalkylsilyl, (meth)acrylalkyl, crotonylalkyl, alkylepoxide such as propylepoxide or butylepoxide and azacyclopropane groups;

[0060] - Q represents an organopolymer or an organooligomer comprising repeating units of saturated, linear or branched or cyclic aliphatic groups, or of aromatic groups or alkylaromatic groups, coupled via carbonate, ester, ether, amide, urethane or urea repeating bonds or combinations thereof;

[0061] - A represents a divalent aliphatic, aromatic, alkylaromatic or linear, saturated, branched or cyclic radical having from 2 to 30 carbon atoms, which may optionally comprise one or more non-pendent heteroatoms such as a nitrogen atom, an oxygen atom, a sulfur atom, or combinations thereof, in the aliphatic chain or the aromatic chain;

[0062] - r denotes an integer equal to 0 or 1 ;

[0063] - m denotes an integer ranging from 0 to 1000, preferably equal to 0 or 1;

[0064] - m’ denotes an integer ranging from 0 to 1000, preferably equal to 0 or 1;

[0065] - n denotes an integer ranging from 0 to 1000, preferably equal to 0 or 1, with m + (m’*n ) > 2.

[0066] Preferably, Zi and Z2 independently represent a reactive end group; more preferentially, Zi and Z2 independently represent a group chosen from alkoxysilyl, hydroxysilyl, acetoxysilyl, vinylsilyl, acrylalkyl silyl, methacrylalkylsilyl, crotonylalkylsilyl, carboxyanhydridoalkylsilyl, carboxyalkylsilyl, hydroxyalkylsilyl, aldehydoalkylsilyl, mercaptoalkyl silyl, norbornenylsilyl, acylpentadienylalkylsilyl, maleimidoalkylsilyl, sulfonylalkylsilyl, (meth)acrylalkyl, crotonylalkyl, alkylepoxide such as propylepoxide or butylepoxide and azacyclopropane groups.

[0067] Such (poly)carbodiimide compounds are sold, for example, by the company Stahl B.V. under the name Permutex XR, or under the name RelcaLinklO or under the name Picassian XL and by the company Nisshinbo under the name Carbodilite with the series V-02, V-02-L2, SV-02, E-02, V-10, SW-12G, E-03A, E-04DG-T, E-05, V- 04, V-02B, V-04PF, V-05.

[0068] Preferably, the (poly)carbodiimide compound(s) are chosen from the compounds of formula (II) below:

[0069] (II), in which:

[0070] - Xi and X2 independently represent an oxygen atom O, a sulfur atom S or an NH group;

[0071] - Ri and R2 independently represent a hydrocarbon-based radical optionally interrupted with one or more heteroatoms;

[0072] - n and z denote an integer ranging from 1 to 20, with n+z > 2 and w denotes an integer ranging from 1 to 3;

[0073] - Li independently represents a Ci-Cis divalent aliphatic hydrocarbon-based radical, a C3-C15 cycloalkylene radical, a C3-C12 heterocycloalkylene group or a Ce-Ci4 arylene group, and mixtures thereof;

[0074] - E independently represents a group chosen from:

[0075] -O-R3-O-; -S-R4-S-; -R5-N(R6)-R4-N(R6)-R5-; in which R3 and R4 independently represent a divalent hydrocarbon-based radical optionally interrupted with one or more heteroatoms; - Rs independently represents a covalent bond or a saturated divalent hydrocarbon-based radical, optionally interrupted with one or more heteroatoms;

[0076] - Rs independently represents a hydrogen atom or a hydrocarbon-based radical, optionally interrupted with one or more heteroatoms.

[0077] The term “hydrocarbon-based radicar means a saturated or unsaturated, linear or branched radical containing from 1 to 300 carbon atoms, preferably from 1 to 250 carbon atoms, more preferentially from 1 to 200 carbon atoms. Preferably, the hydrocarbon-based radical is a saturated linear radical.

[0078] The hydrocarbon-based radical may comprise one or more cyclic groups.

[0079] The hydrocarbon-based radical may be interrupted with one or more heteroatoms, in particular chosen from O, S or N and / or substituted with one or more cations, anions or zwitterions or cationic groups such as ammonium, anionic groups such as carboxylate, or zwitterionic groups, and / or comprising a metal ion which may be incorporated in the form of a salt.

[0080] The term “heter oatom(s)” means an oxygen O, sulfur S or nitrogen N atom, and also halogen atoms such as Cl, F, Br and I. If the heteroatom is included in the chain of the hydrocarbon-based radical, the heteroatom is preferably chosen from oxygen O, sulfur S or nitrogen N atoms.

[0081] Preferably, Xi and X2 independently represent an oxygen atom.

[0082] Preferably, Ri and R2 are independently chosen from dialkylamino alcohols, alkyl esters of hydroxycarboxylic acid and monoalkyl ethers of (poly)alkylene glycol, in which a hydroxyl group has been removed, and mixtures thereof.

[0083] In a preferred embodiment, Ri and R2 are independently chosen from groups

[0084] (i) to (iv) below:

[0085] (i) the compound of formula (III) below:

[0086] R7-O-C(O)-C(R8)(H)- (III), in which R7 represents a C1-C3 alkyl group, and Rs represents a hydrogen atom or a C1-C3 alkyl group; preferably, R7 is a methyl and Rs is a hydrogen atom or a methyl.

[0087] (ii) the compound of formula (IV) below:

[0088] R9-[0-CH2-C(H)(RIO)]P- (IV), in which R9 represents a C1-C4 alkyl group, Rio represents a hydrogen atom or a C1-C4 alkyl group and p denotes an integer ranging from 1 to 3; preferably, R9 is a methyl, ethyl or butyl, Rio is a hydrogen atom or a methyl and p is equal to 1.

[0089] (iii) the compound of formula (V) below:

[0090] (Rii)2N-CH2-C(H)(Ri2)- (V), in which Rn represents a C1-C4 alkyl group and R12 represents a hydrogen atom or a C1-C4 alkyl group; preferably, Rn is a methyl, ethyl or butyl and R12 is a hydrogen atom or a methyl.

[0091] (iv) the compound of formula (VI) below:

[0092] Ri3-[O-CH2-C(H)(Ri4)]q- (VI), in which R13 represents a C1-C4 alkyl group or a phenyl, RI4represents a hydrogen atom or a C1-C4 alkyl group and q denotes an integer ranging from 4 to 30; preferably, R13 is a methyl, ethyl or butyl and RI4is a hydrogen atom or a methyl.

[0093] Preferably, Ri and R2 independently represent a compound of formula (VI) in which R13 represents a C1-C4 alkyl group or a phenyl, preferably a C1-C4 alkyl group, more preferentially a methyl, RI4represents a hydrogen atom or a C1-C4 alkyl group, preferably a hydrogen atom and q denotes an integer ranging from 4 to 30.

[0094] According to an alternative embodiment, Ri and R2 are different and one of the radicals Ri or R2 represents a compound of formula (IV) as described above and the other radical Ri or R2 represents a compound of formula (VI) as described above.

[0095] Preferably, in formula (IV), R9 is a methyl, ethyl or butyl and Rio is a hydrogen atom or a methyl and p is equal to 1.

[0096] Preferably, in formula (VI), R13 is a methyl, ethyl or butyl and RI4is a hydrogen atom or a methyl and q denotes an integer ranging from 4 to 30.

[0097] According to another alternative embodiment, Ri and R2 are identical and represent a compound of formula (VI) in which R13 represents a C1-C4 alkyl group or a phenyl, preferably a C1-C4 alkyl group, more preferentially a methyl, R14 represents a hydrogen atom or a C1-C4 alkyl group, preferably a hydrogen atom and q denotes an integer ranging from 4 to 30.

[0098] Preferably, n denotes an integer ranging from 1 to 20, more preferentially from 2 to 20.

[0099] Preferably, z denotes an integer ranging from 1 to 20, more preferentially from 2 to 20.

[0100] Preferably, w is equal to 1.

[0101] Preferably, w is equal to 1, n+z denotes an integer ranging from 4 to 10.

[0102] Preferably, Li is chosen from a Ci-Cis divalent aliphatic hydrocarbon-based radical such as methylene, ethylene and propylene, a C3-C15 cycloalkylene radical such as cyclopentylene, cycloheptylene and cyclohexylene, a C3-C12 heterocycloalkylene group such as imidazolene, pyrrolene and furanylene, or a Cg-Ci4arylene group such as phenylene, and mixtures thereof.

[0103] For example, Li may be chosen from a radical derived from tolylene diisocyanate, hexamethylene diisocyanate, xylylene diisocyanate, 2,2,4- trimethylhexamethylene diisocyanate, 1,12-dodecane diisocyanate, norbornane diisocyanate, 2,4-bis(8-isocyanatooctyl)-l,3-dioctylcyclobutane, 4,4’- dicyclohexylmethane diisocyanate, tetramethylxylylene diisocyanate, isophorone diisocyanate, 1,5-napththylene diisocyanate, 4,4’-diphenylmethane diisocyanate, 4, ’diphenyldimethylmethane diisocyanate and phenylene diisocyanate, and mixtures thereof.

[0104] Preferably, Li is chosen from a C3-C15 cycloalkylene radical or a C6-C14 arylene group, and mixtures thereof, such as the compounds of formula (VII) below:

[0105] Preferably, Li is 4,4-dicyclohexylenemethane corresponding to formula (VIII) below:

[0106] (VIII).

[0107] According to another embodiment, when LI is a Ce-Cw arylene group, Li is not the m-tetramethylxylylene radical represented by formula (IX) below:

[0108] (IX). As indicated previously, E independently represents a group chosen from:

[0109] -O-R3-O-; -S-R4-S-; -R5-N(R6)-R4-N(R6)-R5-; in which R3 and R4 independently represent a divalent hydrocarbon-based radical optionally interrupted with one or more heteroatoms; - Rs independently represents a covalent bond or a saturated divalent hydrocarbon-based radical, optionally interrupted with one or more heteroatoms; and

[0110] - Rs independently represents a hydrogen atom or a hydrocarbon-based radical, optionally interrupted with one or more heteroatoms.

[0111] Preferably, R3 and R4 are independently chosen from a Cs-Ci4 arylene radical such as phenylene, a C3-C12 cycloalkylene radical such as cyclopropylene and cyclobutylene, a linear or branched Ci-Cis alkylene radical such as methylene and ethylene, optionally interrupted with one or more heteroatom(s), and mixtures thereof.

[0112] More preferentially, R3 and R4 are independently chosen from a linear or branched Ci-Cis alkylene radical such as methylene, butylene, propylene or ethylene, optionally interrupted with one or more heteroatoms.

[0113] Preferably, when R5 is not a covalent bond, Rs is chosen from a Cs-Ci4 arylene radical such as phenylene, a C3-C12 cycloalkylene radical such as cyclopropylene and cyclobutylene, a linear or branched Ci-Cis alkylene radical such as methylene and ethylene, optionally interrupted with one or more heteroatom(s), and mixtures thereof.

[0114] Preferably, Re is chosen from a Ce-Ci4 arylene radical such as phenylene, a C3- C12 cycloalkylene radical such as cyclopropylene and cyclobutylene, a linear or branched Ci-Cis alkylene radical such as methylene and ethylene, optionally interrupted with one or more heteroatom(s), and mixtures thereof.

[0115] Preferably, E represents a group -O-R3-O- in which R3 is chosen from a Ce-Cu arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Cis alkylene radical, optionally interrupted with one or more heteroatoms, and mixtures thereof.

[0116] More preferentially, E represents a group -O-R3-O- in which R3 represents a linear or branched C1-C18 alkylene radical such as methylene, butylene, propylene or ethylene, optionally interrupted with one or more heteroatoms.

[0117] According to a particular embodiment, the (poly)carbodiimide compound is a copolymer derived from a-methyl styryl isocyanates of formula (X) below: in which R independently represents an alkyl group containing from 1 to 24 carbon atoms, a cycloalkyl group containing from 3 to 24 carbon atoms or an aryl group containing from 6 to 24 carbon atoms, and n denotes an integer ranging from 2 to 100.

[0118] In this embodiment, the term “alkyl group” is as defined previously.

[0119] In this embodiment, the term “cycloalkyl group” is as defined previously.

[0120] In this embodiment, n may denote an integer ranging from 2 to 50, preferably from 3 to 30 and even more preferentially from 5 to 10.

[0121] According to another particular embodiment, the (poly)carbodiimide compound is a compound of formula (XI) below:

[0122] (XI), in which R independently represents an alkyl group containing from 1 to 24 carbon atoms, a cycloalkyl group containing from 3 to 24 carbon atoms or an aryl group containing from 6 to 24 carbon atoms.

[0123] The “alkyl group”, the “cycloalkyl group” and the “aryl group” are as defined previously.

[0124] According to a preferred embodiment, the (poly)carbodiimide compound is chosen from the compounds of formula (I) or of formula (II) in which:

[0125] - Xi and X2 independently represent an oxygen atom;

[0126] - Ri and R2 are independently chosen from dialkylamino alcohols, alkyl esters of hydroxycarboxylic acid and monoalkyl ethers of (poly)alkylene glycol, in which a hydroxyl group has been removed, and mixtures thereof, preferably monoalkyl ethers of (poly)alkylene glycol, in which a hydroxyl group has been removed, more preferentially the compound of formula (VI) as described previously in which R13 represents a C1-C4 alkyl group or a phenyl, preferably a C1-C4 alkyl group, more preferentially a methyl, R14 represents a hydrogen atom or a C1-C4 alkyl group, preferably a hydrogen atom, and q denotes an integer ranging from 4 to 30;

[0127] - n and z, when they are present, denote an integer ranging from 1 to 20, with n+z > 2 and w is equal to 1 ;

[0128] - Li, when it is present, is chosen from a Ci-Cis divalent aliphatic hydrocarbonbased radical, a C3-C15 cycloalkylene radical, a C3-C12 heterocycloalkylene group or a C6-C14 arylene group, and mixtures thereof, preferably a C3-C15 cycloalkylene radical;

[0129] - A, when it is present, is chosen from a Ci-Cis divalent aliphatic hydrocarbonbased radical, a C3-C15 cycloalkylene radical, a C3-C12 heterocycloalkylene group or a C6-C14 arylene group, and mixtures thereof, preferably a C3-C15 cycloalkylene radical; - E, when it is present, independently represents a group chosen from:

[0130] -O-R3-O-; -S-R4-S-; -R5-N(R6)-R4-N(R6)-R5-; in which R3 and R4 are independently chosen from a C6-C14 arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Cis alkylene radical, optionally interrupted with one or more heteroatoms, and mixtures thereof;

[0131] - when R5 is not a covalent bond, R5, when it is present, is chosen from a Cg- C14 arylene radical, a C3-C12 cycloalkylene radical, a linear or branched C1-C18 alkylene radical, optionally interrupted with one or more heteroatom(s), and mixtures thereof; and

[0132] - Rg, when it is present, is chosen from a Cg-Ci4 arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Cis alkylene radical, optionally interrupted with one or more heteroatom(s), and mixtures thereof.

[0133] Preferably, the (poly)carbodiimide compound is chosen from the compounds of formula (II) in which:

[0134] - Xi and X2 independently represent an oxygen atom;

[0135] - Ri and R2 are independently chosen from dialkylamino alcohols, alkyl esters of hydroxycarboxylic acid and monoalkyl ethers of (poly)alkylene glycol, in which a hydroxyl group has been removed, and mixtures thereof;

[0136] - n and z denote an integer ranging from 1 to 20, with n+z > 2 and w is equal to 1;

[0137] - Li is chosen from a Ci-Cis divalent aliphatic hydrocarbon-based radical, a C3- C15 cycloalkylene radical, a C3-C12 heterocycloalkylene group or a C -Ci4 arylene group, and mixtures thereof;

[0138] - E independently represents a group chosen from:

[0139] -O-R3-O-; -S-R4-S-; -R5-N(R6)-R4-N(Rg)-R5-; in which R3 and R4 are independently chosen from a Cg-Ci4arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Cis alkylene radical, optionally interrupted with one or more heteroatoms, and mixtures thereof;

[0140] - when R5 is not a covalent bond, R5 is chosen from a Cg-Ci4 arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Cis alkylene radical, optionally interrupted with one or more heteroatoms, and mixtures thereof; and

[0141] - Rg is chosen from a C -Ci4 arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Cis alkylene radical, optionally interrupted with one or more heteroatoms, and mixtures thereof.

[0142] More preferentially, the (poly)carbodiimide compound is chosen from the compounds of formula (II) in which:

[0143] - Xi and X2 independently represent an oxygen atom; - Ri and R2 are, independently, monoalkyl ethers of (poly)alkylene glycol, in which a hydroxyl group has been removed;

[0144] - n and z denote an integer ranging from 1 to 20, with n+z > 2 and w is equal to 1;

[0145] - Li is a C3-C15 cycloalkylene radical;

[0146] - E independently represents a group chosen from:

[0147] -O-R3-O-; -S-R4-S-; -R5-N(R6)-R4-N(R6)-R5-; in which R3 and R4 are independently chosen from a Ce-Ci4 arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Cis alkylene radical, optionally interrupted with one or more heteroatoms, and mixtures thereof;

[0148] - when R5 is not a covalent bond, R5 is chosen from a C6-C14 arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Cis alkylene radical, optionally interrupted with one or more heteroatoms, and mixtures thereof; and

[0149] - Re is chosen from a Ce-Cu arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Cis alkylene radical, optionally interrupted with one or more heteroatoms, and mixtures thereof.

[0150] Even more preferentially, the (poly)carbodiimide compound is chosen from the compounds of formula (II) in which:

[0151] - Xi and X2 independently represent an oxygen atom;

[0152] - Ri and R2 independently represent the compound of formula (VI) below:

[0153] Ri3-[O-CH2-C(H)(Ri4)]q- (VI), in which R13 represents a C1-C4 alkyl group or a phenyl, preferably a C1-C4 alkyl group, more preferentially a methyl, RI4represents a hydrogen atom or a C1-C4 alkyl group, preferably a hydrogen atom and q denotes an integer ranging from 4 to 30;

[0154] - n and z denote an integer ranging from 2 to 20, with n+z ranging from 4 to 10 and w is equal to 1;

[0155] - Li is a C3-C15 cycloalkylene radical such as cyclopentylene, cycloheptylene, cyclohexylene and 4, 4-di cyclohexylenemethane; and

[0156] - E represents a group -O-R3-O- in which R3 is chosen from a Ce-Ci4arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Cis alkylene radical, optionally interrupted with one or more heteroatoms, and mixtures thereof.

[0157] Even more preferentially, the (poly)carbodiimide compound is chosen from the compounds of formula (II) in which:

[0158] - Xi and X2 independently represent an oxygen atom;

[0159] - Ri and R2 independently represent the compound of formula (VI) below:

[0160] Ri3-[O-CH2-C(H)(Ri4)]q- (VI) in which R13 represents a C1-C4 alkyl group or a phenyl, preferably a C1-C4 alkyl group, more preferentially a methyl, R14 represents a hydrogen atom or a C1-C4 alkyl group, preferably a hydrogen atom, and q denotes an integer ranging from 4 to 30;

[0161] - n and z denote an integer ranging from 2 to 20, with n+z ranging from 4 to 10 and w is equal to 1;

[0162] - Li is a C3-C15 cycloalkylene radical such as cyclopentylene, cycloheptylene, cyclohexylene and 4,4-dicyclohexylenemethane, preferably 4,4- dicyclohexylenemethane; and

[0163] - E represents a group -O-R3-O- in which R3 represents a linear or branched Ci- Ci8 alkylene radical such as methylene, propylene, butylene or ethylene, optionally interrupted with one or more heteroatoms.

[0164] According to a preferred embodiment, the (poly)carbodiimide compound is a compound of formula (XII) below: in which LI is 4,4-dicyclohexylenemethane, n and z denote an integer ranging from 2 to 20, with n+z ranging from 4 to 10, E represents a group -O-R3-O- in which R3 represents a linear or branched Ci-Cis alkylene radical such as methylene, propylene, butylene or ethylene, optionally interrupted with one or more heteroatoms, and r and s denote an integer ranging from 4 to 30.

[0165] The total amount of the (poly)carbodiimide compound(s) present in the dyeing composition preferably ranges from 0.01% to 20% by weight, preferably from 0.1% to 15% by weight, more preferentially from 0.2% to 10% by weight, even more preferentially from 0.5% to 8%, better still from 1% to 6% by weight relative to the total weight of the dyeing composition.

[0166] Pigment

[0167] As indicated previously, the hair keratin fibers dye composition used in the context of the process according to the invention comprises one or more pigments.

[0168] The term “pigment” refers to any pigment that gives colour to keratin materials. Their solubility in water at 25°C and at atmospheric pressure (760 mmHg) is less than 0.05% by weight, and preferably less than 0.01%.

[0169] The pigments that may be used are notably chosen from the organic and / or mineral pigments known in the art, notably those described in Kirk-Othmer’s Encyclopedia of Chemical Technology and in Ullmann’ s Encyclopedia of Industrial Chemistry.

[0170] Preferably, the pigment(s) are chosen from iron oxides, notably red, brown or black iron oxides, nacreous pigments such as mica coated with titanium or with bismuth oxychloride, coloured nacreous pigments such as mica covered with titanium and with iron oxides, mica covered with iron oxide, mica covered with titanium, and mixtures thereof.

[0171] As an example of an iron oxide, mention may be made of the iron oxide sold by the company Sun Chemical under the name SunPuro® Red Iron Oxide.

[0172] Advantageously, the total amount of pigment(s) ranges from 0.05% to 20% by weight, preferably from 0.1% to 15% by weight and more preferably from 0.5% to 10% by weight relative to the total weight of the dyeing composition.

[0173] The hair keratin fibers dye composition used in the context of the process according to the invention may comprise one or more direct dyes.

[0174] The term “direct dye” means natural and / or synthetic dyes, other than oxidation dyes. These are dyes which will spread superficially on the fibre.

[0175] They may be ionic or nonionic, preferably cationic or nonionic.

[0176] Examples of suitable direct dyes that may be mentioned include azo direct dyes; (poly)methine dyes such as cyanines, hemicyanines and styryls; carbonyl dyes; azine dyes; nitro(hetero)aryl dyes; tri(hetero)arylmethane dyes; porphyrin dyes; phthalocyanine dyes and natural direct dyes, alone or in the form of mixtures.

[0177] The direct dye(s) can be present in a total amount ranging from 0.001% to 10% by weight of the total weight of the composition, preferably from 0.005% to 5% by weight relative to the total weight of the dyeing composition. Polymer comprising at least one reactive group chosen from the carboxylic acids

[0178] The hair keratin fibers dye composition comprises at least one polymer comprising at least one reactive group chosen from the carboxylic acids.

[0179] The polymer(s) comprising at least one reactive group chosen from the carboxylic acids is preferably an acrylic polymer.

[0180] Preferably, the polymer(s) comprising at least one reactive group chosen from the carboxylic acids, preferably acrylic polymers, are in the form of aqueous dispersions of acrylic polymer particles, more preferentially in the form of aqueous dispersions of film-forming acrylic polymer particles.

[0181] Thus, preferably, the dye composition comprises at least one acrylic polymer in the form of aqueous dispersions of acrylic polymer particles.

[0182] The dispersion(s) may be simple dispersions in the aqueous medium of the cosmetic composition. As a particular case of dispersions, mention may be made of latices.

[0183] For the purposes of the invention, the term “polymer” means a compound corresponding to the repetition of one or more units (these units being derived from compounds known as monomers). This or these unit(s) are repeated at least twice and preferably at least three times.

[0184] The term “film-forming polymer” refers to a polymer that is capable of forming, by itself or in the presence of an auxiliary film-forming agent, a macroscopically continuous film on a support, notably on the hair keratin fibers, and preferably a cohesive film.

[0185] For the purposes of the present invention, the term “acrylic polymer” means a polymer synthesized from at least one monomer chosen from (meth)acrylic acid and / or (meth)acrylic acid ester and / or (meth)acrylic acid amide.

[0186] Preferably, the acrylic polymer(s) according to the invention comprise one or more units derived from the following monomers: a) (meth)acrylic acid; and b) Ci to C30, more preferentially Ci to C20, better still Ci to C10, and even more particularly Ci to C4, alkyl (meth)acrylate.

[0187] Advantageously, the total content of polymer(s) comprising at least one reactive group chosen from the carboxylic acids, preferably acrylic polymer(s), ranges from 0.1% to 35% by weight, more preferentially from 0.5% to 30% by weight, better still from 1% to 20% by weight, and even more preferentially from 3% to 15% by weight relative to the total weight of the dye composition.

[0188] Moreover, the dye composition used in the context of the process according to the invention may also comprise at least one non-carboxylic anionic thickener. For the purposes of the present invention, the term “non-carboxylic agent” means an agent which does not comprise any carboxylic acid functions (-COOH) or carboxylate functions (-COO ).

[0189] Advantageously, the total amount of the non-carboxylic anionic thickener(s) ranges from 0.01% to 20% by weight, preferably from 0.1% to 10% by weight, more preferentially from 0.1% to 5% by weight and even more preferentially from 0.1% to 3% by weight relative to the total weight of the dye composition.

[0190] The dye composition used in the context of the process according to the invention may also comprise at least one associative polymer different from said polymer comprising at least one reactive group chosen from the carboxylic acids and from said non-carboxylic anionic thickener.

[0191] Advantageously, the total amount of said associative polymer(s) ranges from 0.05% to 15% by weight, preferably from 0.05% to 10% by weight, more preferentially from 0.1% to 5% by weight and even more preferentially from 0.1% to 1% by weight relative to the total weight of the dye composition.

[0192] The dye composition used in the context of the process according to the invention may also comprise any commonly used adjuvant or additive.

[0193] The hair keratin fibers dye composition may notably be in the form of a suspension, a dispersion, a gel, an emulsion, notably an oil-in-water (O / W) or water- in-oil (W / O) emulsion, or a multiple emulsion (W / O / W or polyol / O / W or O / W / O), in the form of a cream, a mousse, a stick, a dispersion of vesicles, notably of ionic or nonionic lipids, or a two-phase or multi-phase lotion.

[0194] The application of the dye composition may be followed by the application of a composition D comprising at least one silicone compound comprising at least one carboxylic group.

[0195] The term “carboxylic group” means a COOH or COO’ functional group, the counterion of the COO" group possibly being chosen from alkali metals, alkaline-earth metals and quaternary ammoniums.

[0196] The silicones that may be used may be soluble or insoluble in composition D; they may be in the form of oil, wax, resin or gum; silicone oils and gums are preferred.

[0197] Silicones are notably described in detail in Walter Noll’s Chemistry and Technology of Silicones (1968), Academic Press.

[0198] Preferably, the silicone compound(s) comprising at least one carboxylic group are chosen from the organosiloxanes of formula (XXVII) below:

[0199] (XXVII) in which:

[0200] - R1 independently represent an alkyl group containing from 1 to 20 carbon atoms, preferably from 1 to 10 carbon atoms; a hydroxyl group; an alkoxy group containing from 1 to 20 carbon atoms or an aryl group containing from 6 to 12 carbon atoms;

[0201] - R2 independently represents a group R4-C00M with R4 representing a linear or branched alkylene group containing from 1 to 20 carbon atoms, preferably from 4 to 16 carbon atoms, optionally interrupted with at least one heteroatom chosen from a sulfur atom, a nitrogen atom, an oxygen atom and mixtures thereof, and M representing a hydrogen atom; an alkali metal or alkaline-earth metal or a quaternary ammonium NR’ 3, with R’, which may be identical or different, representing H or alkyl containing from 1 to 4 carbon atoms; a pyrrolidone radical comprising a carboxylic group COOH or a group Ra-(ORb)x-COOM with Ra representing a linear or branched alkylene group containing from 1 to 4 carbon atoms, Rb representing an alkyl group containing from 1 to 4 carbon atoms, x being an integer ranging from 1 to 200; and M representing a hydrogen atom, an alkali metal or alkaline-earth metal or a quaternary ammonium NR with R’, which may be identical or different, representing H or an alkyl containing from 1 to 4 carbon atoms;

[0202] - R3 independently represent an alkyl group containing from 1 to 20 carbon atoms; a hydroxyl group; a group R4-C00M with R4 representing a linear or branched alkylene group containing from 1 to 20 carbon atoms, preferably from 4 to 16 carbon atoms, optionally interrupted with at least one heteroatom chosen from a sulfur atom, a nitrogen atom, an oxygen atom and mixtures thereof, and M representing a hydrogen atom; an alkali metal or alkaline-earth metal or a quaternary ammonium NR’ 3, with R’, which may be identical or different, representing H or alkyl containing from 1 to 4 carbon atoms; an alkoxy group containing from 1 to 20 carbon atoms; an aryl group containing from 6 to 12 carbon atoms or a group Ra-(ORb)x-COOM with Ra representing a linear or branched alkylene group containing from 1 to 4 carbon atoms, Rb representing an alkyl group containing from 1 to 4 carbon atoms, x being an integer ranging from 1 to 200; and M representing a hydrogen atom, an alkali metal or alkaline-earth metal or a quaternary ammonium NR’ 3, with R’, which may be identical or different, representing H or an alkyl containing from 1 to 4 carbon atoms;

[0203] - n denotes an integer ranging from 1 to 1000;

[0204] - p denotes an integer ranging from 0 to 1000; it being understood that at least one of the radicals R2 and / or R3 comprises a carboxylic group COOH or COOM with M representing an alkali metal or alkaline- earth metal or a quaternary ammonium NR’3, with R’, which may be identical or different, representing H or an alkyl containing from 1 to 4 carbon atoms.

[0205] Notably, the silicone compound(s) comprising at least one carboxylic group may be chosen from the organosiloxanes of formula (XXVIII) below:

[0206] (XXVIII), in which:

[0207] - R1 independently represents a linear or branched alkyl group containing from 1 to 20 carbon atoms, preferably from 1 to 10 carbon atoms and better still from 1 to 6 carbon atoms, preferentially methyl;

[0208] - R4 independently represents a linear or branched alkylene group containing from 1 to 20 carbon atoms, preferably from 4 to 16 carbon atoms, optionally interrupted with at least one heteroatom chosen from a sulfur atom, a nitrogen atom, an oxygen atom and mixtures thereof; or a divalent group Ra-(ORb)x- with Ra representing a linear or branched alkylene group containing from 1 to 4 carbon atoms, Rb representing an alkylene group containing from 1 to 4 carbon atoms, and x being an integer ranging from 1 to 200;

[0209] - M independently represents a hydrogen atom, an alkali metal or alkaline-earth metal or a quaternary ammonium NR’3, with R’, which may be identical or different, representing H or an alkyl containing from 1 to 4 carbon atoms;

[0210] - n denotes an integer ranging from 1 to 1000;

[0211] - the organosiloxanes of formula (XXIX) below: in which:

[0212] - R1 independently represents an alkyl group containing from 1 to 10 carbon atoms, preferably from 1 to 6 carbon atoms, more preferentially a methyl;

[0213] - R4 represents a linear or branched, saturated or unsaturated alkylene group containing from 1 to 20 carbon atoms, preferably from 4 to 16 carbon atoms, optionally interrupted with at least one heteroatom chosen from a sulfur atom, a nitrogen atom, an oxygen atom and mixtures thereof; or a divalent group Ra-(ORb)x- with Ra representing a linear or branched alkylene group containing from 1 to 4 carbon atoms, Rb representing an alkylene group containing from 1 to 4 carbon atoms, and x being an integer ranging from 1 to 200;

[0214] - M represents a hydrogen atom, an alkali metal or alkaline-earth metal or a quaternary ammonium NR’3, with R’, which may be identical or different, representing H or an alkyl containing from 1 to 4 carbon atoms;

[0215] - p denotes an integer ranging from 1 to 1000;

[0216] - n denotes an integer ranging from 1 to 1000;

[0217] - the organosiloxanes of formula (XXX) below: in which:

[0218] - R1 independently represents an alkyl group containing from 1 to 20 carbon atoms, preferably from 1 to 10 carbon atoms and better still from 1 to 6 carbon atoms, preferentially methyl;

[0219] - R4 represents a linear or branched alkylene group containing from 1 to 20 carbon atoms, preferably from 4 to 16 carbon atoms, optionally interrupted with at least one heteroatom chosen from a sulfur atom, a nitrogen atom, an oxygen atom and mixtures thereof; or a divalent group Ra-(ORb)x- with Ra representing a linear or branched alkylene group containing from 1 to 4 carbon atoms, Rb representing an alkylene group containing from 1 to 4 carbon atoms, and x being an integer ranging from 1 to 200;

[0220] - R3 represents an alkyl group containing from 1 to 20 carbon atoms, an alkoxy group containing from 1 to 20 carbon atoms or an aryl group containing from 6 to 12 carbon atoms;

[0221] - M independently represents a hydrogen atom, an alkali metal or alkaline-earth metal or a quaternary ammonium NR’j, with R’, which may be identical or different, representing H or an alkyl containing from 1 to 4 carbon atoms;

[0222] - n denotes an integer ranging from 1 to 1000;

[0223] - the organosiloxanes of formula (XXXI) below: in which:

[0224] - R8 represents an alkyl group containing from 1 to 6 carbon atoms, preferably a methyl;

[0225] - m denotes an integer ranging from 1 to 1000;

[0226] - n denotes an integer ranging from 1 to 1000;

[0227] - and mixtures thereof.

[0228] Among the organosiloxanes of formula (XXVIII), mention may be made of polydimethylsiloxanes (PDMS) bearing a carboxyl end function, such as the compounds sold by the company Momentive under the trade name Silform INX (INCI name: Bis-Carboxydecyl Dimethicone).

[0229] Among the organosiloxanes of formula (XXIX), mention may be made of polydimethylsiloxanes (PDMS) bearing a carboxyl side function, such as the compounds sold by the company Shin-Etsu under the trade name X-22-3701E. Among the organosiloxanes of formula (XXX), mention may be made of polydimethylsiloxanes (PDMS) bearing a carboxyl end function, such as the compounds sold by the company Shin-Etsu under the trade name X-22-3710.

[0230] Among the organosiloxanes of formula (XXXI), mention may be made of the compounds sold by the company Grant Industries under the trade name Grandsil SiW- PCA-10 (INCI name: Dimethicone (and) PC A Dimethicone (and) Butylene Glycol (and) Decyl Glucoside).

[0231] The silicone compounds comprising a carboxylic group may correspond, for example, to the compounds described in the patent application EP 186 507 in the name of Chisso Corporation, introduced herein by reference.

[0232] Preferably, the silicone compound(s) comprising at least one carboxylic group are chosen from the organopolysiloxanes of formula (XXVIII), the organopolysiloxanes of formula (XXIX) and mixtures thereof.

[0233] More preferentially, the silicone compound(s) comprising at least one carboxylic group are chosen from the organopolysiloxanes of formula (XXVIII) below:

[0234] (XXVIII), in which:

[0235] - R1 independently represents a linear or branched alkyl group containing from 1 to 20 carbon atoms, preferably from 1 to 10 carbon atoms and better still from 1 to 6 carbon atoms, preferentially methyl;

[0236] - R4 independently represents a linear or branched alkylene group containing from 1 to 20 carbon atoms, preferably from 4 to 16 carbon atoms, optionally interrupted with at least one heteroatom chosen from a sulfur atom, a nitrogen atom, an oxygen atom and mixtures thereof; or a divalent group Ra-(ORb)x- with Ra representing a linear or branched alkylene group containing from 1 to 4 carbon atoms, Rb representing an alkylene group containing from 1 to 4 carbon atoms, and x being an integer ranging from 1 to 200;

[0237] - M independently represents a hydrogen atom, an alkali metal or alkaline-earth metal or a quaternary ammonium NR’3, with R’, which may be identical or different, representing H or an alkyl containing from 1 to 4 carbon atoms;

[0238] - n denotes an integer ranging from 1 to 1000. Advantageously, the total amount of silicone compound(s) comprising at least one carboxylic group ranges from 0.01% to 20% by weight, preferably from 0.1% to 15% by weight, more preferentially from 0.5% to 10% by weight and better still from 1% to 5% by weight relative to the total weight of composition D.

[0239] Oils

[0240] Composition D may comprise one or more oil(s) other than the silicone compounds comprising a carboxylic group described previously.

[0241] Preferably, composition D comprises one or more oils. More preferentially, composition D comprises one or more oils chosen from alkanes.

[0242] The term “oil” means a fatty substance that is liquid at room temperature (25°C) and at atmospheric pressure (760 mmHg or 1.013 *105Pa).

[0243] The oil may be volatile or non-volatile.

[0244] The term “volatile oil” refers to an oil that can evaporate on contact with the skin in less than one hour, at room temperature and atmospheric pressure. The volatile oil is a cosmetic volatile oil, which is liquid at room temperature. More specifically, a volatile oil has an evaporation rate of between 0.01 and 200 mg / cm2 / min, limits included (see protocol for measuring the evaporation rate indicated in the text below).

[0245] “Non-volatile oil” means an oil that remains on the skin or the keratin hair fibers at room temperature and atmospheric pressure. More specifically, a non-volatile oil has an evaporation rate of strictly less than 0.01 mg / cm2 / min (see protocol for measuring the evaporation rate indicated in the text below).

[0246] Preferably, the composition comprises one or more oils chosen from Ce-Ci6 alkanes and / or mixtures thereof.

[0247] As regards the Ce-Ci6 alkanes, they may be linear or branched, and possibly cyclic.

[0248] Mention may notably be made of branched Cs-Ci6 alkanes, such as Cg-Ci6 isoalkanes (also known as isoparaffins), isododecane, isodecane or isohexadecane, and for example the oils sold under the Isopar or Permethyl trade names, and mixtures thereof.

[0249] Mention may also be made of linear alkanes, preferably of plant origin, comprising from 7 to 15 carbon atoms, in particular from 9 to 14 carbon atoms and more particularly from 11 to 13 carbon atoms.

[0250] As examples of linear alkanes that are suitable for use in the invention, mention may be made of n-heptane (C7), n-octane (C8), n-nonane (C9), n-decane (CIO), n- undecane (Cl l), n-dodecane (C12), n-tridecane (C13), n-tetradecane (C14) and n- pentadecane (Cl 5), and mixtures thereof, and in particular the mixture of n-undecane (Cl l) and n-tridecane (C13) described in Example 1 of patent application WO 2008 / 155 059 by the company Cognis. Mention may also be made of n-dodecane (C12) and n-tetradecane (C14) sold by Sasol under the references, respectively, Parafol 12-97 and Parafol 14-97, and also mixtures thereof.

[0251] As examples of alkanes that are suitable for use in the invention, mention may be made of the alkanes described in patent applications WO 2007 / 068 371 and WO 2008 / 155 059. These alkanes are obtained from fatty alcohols, which are themselves obtained from coconut kernel oil or palm oil.

[0252] According to a particular embodiment, the composition comprises isododecane. Such a compound is, for example, the isododecane sold under the reference Isododecane by Ineos.

[0253] Preferably, composition D comprises one or more oils chosen from Cg-Cie alkanes, more preferentially from isododecane, isohexadecane, tetradecane and / or mixtures thereof.

[0254] More preferentially, composition D comprises isododecane.

[0255] Composition D may comprise one or more oil(s) other than the silicone compounds comprising a carboxylic group, present in a total amount of between 30% and 99% by weight, preferably between 50% and 99% by weight and better still between 70% and 99% by weight relative to the total weight of composition D.

[0256] Composition D may comprise at least one colouring agent chosen from pigments, direct dyes and mixtures thereof as described previously.

[0257] The colour removal process according to the invention is also effective in the context of hair keratin fibers dyeing with the dye composition described above followed by post-treatment with composition D described previously.

[0258] Colour-removing composition

[0259] As indicated previously, the process for treating hair keratin fibers comprises a step of removing the colour from hair keratin fibers dyed by the dyeing composition as defined above, comprising the application to said hair keratin fibers of at least one colour-removing composition comprising at least one alkyl or alkylene carbonate and at least one fatty acid.

[0260] According to a particular embodiment, the step of dyeing the hair keratin fibers comprising the application of the dye composition as defined above is followed by a step of application of composition D.

[0261] This step of applying this colour-removing composition consists in creating a chemical action designed to impair the integrity of the coloured coating formed around the hair keratin fibers strands so as to lead to the removal of this coloured coating from said hair keratin fibers strands. Alkyl or alkylene carbonate

[0262] “ Alkyl carbonate” means an alkyl or dialkyl carbonate.

[0263] Preferably, the alkyl or alkylene carbonate is a C1-C30, preferably Ci-Ce alkyl carbonate, or a C1-C30, preferably Ci-Cg alkylene carbonate.

[0264] More preferentially, the alkyl or alkylene carbonate is chosen from alkylene carbonates, better still from propylene carbonate, butylene carbonate, pentylene carbonate and mixtures thereof.

[0265] Particularly preferably, the alkyl or alkylene carbonate is chosen from propylene carbonate.

[0266] Advantageously, the total content of alkyl or alkylene carbonate ranges from 20% to 60% by weight, preferably from 30% to 50% by weight, more preferentially from 35% to 45% by weight relative to the total weight of the colour-removing composition.

[0267] Fatty acid

[0268] The term "fatty acid" means a long-chain carboxylic acid, notably a linear or branched, saturated or unsaturated, in particular unsaturated, alkyl chain comprising from 6 to 40 carbon atoms, preferably from 8 to 30 carbon atoms, more preferentially from 10 to 30 carbon atoms and better still from 14 to 22 carbon atoms.

[0269] Preferably, the fatty acids include at least one carboxylic acid group and a linear or branched, saturated or unsaturated, in particular unsaturated, alkyl chain comprising from 10 to 30 carbon atoms, preferably from 14 to 22 carbon atoms.

[0270] More preferentially, the fatty acids according to the invention are chosen from compounds having the structure R-C(O)OH in which R represents a linear or branched, saturated or unsaturated alkyl group comprising from 5 to 39 carbon atoms, preferably from 7 to 29 carbon atoms, preferentially from 11 to 23 carbon atoms, better still from 13 to 19 carbon atoms.

[0271] For the purposes of the present invention, the fatty acids present in the composition are neither oxyalkylenated nor glycerolated.

[0272] The fatty acids may be chosen from liquid fatty acids and solid fatty acids, and mixtures thereof.

[0273] For the purposes of the present invention, the term “solid fatty acid” means a fatty acid with a melting point of greater than 25°C, preferably greater than or equal to 28°C, more preferentially greater than or equal to 30°C at atmospheric pressure (1.O13X 1O5Pa).

[0274] The solid fatty acids used in the present invention are notably chosen from myristic acid, cetylic acid, stearylic acid, palmitic acid, arachidic acid, stearic acid, lauric acid, behenic acid, 12-hydroxystearic acid, and mixtures thereof, preferably chosen from palmitic acid, lauric acid, myristic acid, stearic acid, and mixtures thereof.

[0275] For the purposes of the present invention, the term “liquid fatty acid” means a fatty acid with a melting point of less than or equal to 25°C, preferably less than or equal to 20°C at atmospheric pressure (1.013*105Pa).

[0276] The liquid fatty acid(s) may be chosen from oleic acid, linoleic acid, arachidonic acid, and mixtures thereof, preferentially oleic acid.

[0277] Preferably, the fatty acid(s) present in the colour-removing composition are chosen from fatty acids including at least one carboxylic acid group and a linear or branched, saturated or unsaturated alkyl chain comprising from 10 to 30 carbon atoms, in particular from 14 to 22 carbon atoms.

[0278] According to a preferred embodiment, the fatty acid(s) present in the colourremoving composition are chosen from liquid fatty acids, preferably chosen from oleic acid, linoleic acid, arachidonic acid and mixtures thereof, more preferentially oleic acid.

[0279] The fatty acid(s), which are preferably liquid, are generally present in a total content ranging from 0.1% to 25% by weight, preferably from 0.5% to 20%, preferentially from 1% to 15%, better still from 4% to 10% relative to the total weight of the colour-removing composition.

[0280] Polyol

[0281] The colour-removing composition used in the context of the process according to the invention may also comprise at least one polyol.

[0282] For the purposes of the present invention, “polyol” means an organic compound constituted of a hydrocarbon-based chain optionally interrupted with one or more oxygen atoms and bearing at least two free hydroxyl groups (-OH) borne by different carbon atoms, it being possible for this compound to be cyclic or acyclic, linear or branched, and saturated or unsaturated.

[0283] More particularly, the polyol(s) comprise from 2 to 30 hydroxyl groups, more preferentially from 2 to 10 hydroxyl groups, even more preferentially from 2 to 3 hydroxyl groups.

[0284] The colour-removing composition may comprise one or more polyols chosen from diglycerol, glycerol, propylene glycol, propane-1, 3-diol, 1,3-butylene glycol, pentane- 1,2-diol, octane- 1,2-diol, dipropylene glycol, hexylene glycol, ethylene glycol, polyethylene glycols, sorbitol, sugars, such as glucose, and mixtures thereof.

[0285] Particularly preferably, the polyol is propylene glycol. Advantageously, the content of polyol, when it is present, ranges from 20% to 70% by weight, preferably from 30% to 60% by weight, more preferentially from 45% to 55% by weight relative to the total weight of the colour-removing composition.

[0286] The colour-removing composition used in the context of the process according to the invention may comprise water.

[0287] According to another particular embodiment, the colour-removing composition is free of water.

[0288] Preferably, the colour-removing composition is free of water.

[0289] Moreover, the additives as mentioned above may be included in the colourremoving composition used in the context of the process according to the invention.

[0290] The colour-removing composition used in the context of the process according to the invention may comprise one or more non-carboxylic anionic thickeners as described previously, in a total content ranging preferably from 0.01% to 10% by weight, preferentially from 0.1% to 5% by weight, better still from 0.2% to 2% by weight relative to the total weight of the composition.

[0291] Hair keratin fibers tongs

[0292] As indicated previously, the process for treating hair keratin fibers according to the invention may comprise a step of applying to hair keratin fibers tongs comprising two arms A and B between which said hair keratin fibers pass, after the step of removing the colour from hair keratin fibers dyed by the dye composition applied in the step of dyeing the hair keratin fibers.

[0293] Preferably, the process for treating hair keratin fibers according to the invention comprises the application to the hair keratin fibers of tongs comprising two arms A and B, between which said hair keratin fibers pass.

[0294] The hair keratin fibers tongs as described previously may have an articulation axis (Z) about which the arms A and B are articulated.

[0295] According to a preferred embodiment, arms A and B are articulated about the axis of articulation (Z) and can move angularly towards each other.

[0296] Each arm A and B comprises a supporting part and an active part.

[0297] The supporting part corresponds to the part for gripping the tongs by the user. The active part corresponds to the part that is in contact with the hair keratin fibers.

[0298] Said arms A and B are movable between a spaced-apart position in which the active parts are at a distance from each other, and a brought-together position in which the active parts are brought towards each other.

[0299] According to a preferred embodiment, the active parts of arms A and B are arranged facing each other. According to a preferred embodiment, the arms A and B are articulated about the axis of articulation (Z) and can move angularly towards each other in order for the active parts of arms A and B to be in contact with each other.

[0300] When the active parts of arms A and B are in contact, the hair keratin fibers are clamped between the active parts of arms A and B.

[0301] Said active parts of arms A and B can comprise an active face and an opposite face, said active face having bristles.

[0302] Said bristles can be arranged in the form of tufts of bristles.

[0303] There are free spaces between each tuft of bristles.

[0304] Preferably, the active faces of arms A and B have tufts of bristles and free spaces.

[0305] The tufts of bristles are generally made from a natural material such as natural silks, or animal bristles, such as squirrel, boar or goat bristles.

[0306] Using natural materials for producing tongs of this kind considerably increases the manufacturing costs thereof, and therefore tongs have been developed in which the tufts of bristles are made from synthetic hair keratin fibers that substantially reproduce the mechanical properties of tongs in which the tufts of bristles have been made from natural bristles.

[0307] Each of the active parts of arms A and B can comprise rows of tufts of bristles.

[0308] There are free spaces between each row of tufts of bristles.

[0309] Preferably, the active faces of arms A and B have rows of tufts of bristles separated by free spaces.

[0310] According to a preferred embodiment, the rows of tufts of bristles of the active parts are arranged parallel to each other.

[0311] In this embodiment, each row of tufts of bristles is separated by free spaces.

[0312] The hair keratin fibers may be arranged between the tufts of bristles to form waves.

[0313] When the active parts are brought close together, said bristles of arms A and B interpenetrate so as to enclose said hair keratin fibers without blocking it.

[0314] Preferably, when the active parts of arms A and B are brought close together, the rows of tufts of bristles of arm A interpenetrate with the rows of tufts of bristles of arm B so as to enclose said hair keratin fibers without blocking it.

[0315] When arms A and B are brought close together, the tongs according to the invention have the ability to move along the hair keratin fibers, i.e. from the root to the end of the hair keratin fibers, without blocking it.

[0316] By moving the tongs according to the invention along the hair keratin fibers while maintaining the close-together position of arms A and B, said tufts of bristles of arms A and B exert a rubbing force on the dyed and then bleached hair keratin fibers, so as to remove the remainder of the dye coating present on said hair keratin fibers.

[0317] The rubbing force exerted on the hair keratin fibers is between 5 N and 20 N.

[0318] The invention may be better understood from reading the following detailed description, and by referring to the appended drawings, in which:

[0319] - [Fig. 1] schematically shows, in elevation, an example of hair keratin fibers tongs made in accordance with the invention;

[0320] - [Fig. 2] represents in isolation the active faces of the active parts of the arms A and B of Figure 1, placed side by side.

[0321] Figure 1 represents hair keratin fibers tongs 1, as described previously. The hair keratin fibers tongs 1 comprise two arms A and B, between which said hair keratin fibers pass.

[0322] The arms A and B are articulated about an axis of articulation (Z) and can move angularly towards each other, particularly via one or more springs (not shown).

[0323] Arms A and B are capable of closing on the hair keratin fibers under the impulse of an outer force, in order to move along said hair keratin fibers.

[0324] Each arm A and B comprises a supporting part 2 and an active part 3.

[0325] The active parts 3 of arms A and B can be arranged facing each other.

[0326] The two arms A and B can be articulated about the axis of articulation (Z) and can move angularly towards each other in order for the active parts 3 of arms A and B to be in contact with each other.

[0327] Said active parts 3 of arms A and B comprise an active face 4 and an opposite face 5.

[0328] The active faces 4 of arms A and B have bristles 6. Preferably, the opposite faces of arms A and B do not have bristles.

[0329] The bristles can be grouped together into tufts of bristles 6.

[0330] Figure 2 shows the active faces 4 of the active parts 3 of arms A and B side by side.

[0331] The active faces of arms A and B have bristles 6, said bristles being organized in the form of tufts of bristles 6.

[0332] There may be free spaces 8 between each tuft of bristles 6.

[0333] The active faces of arms A and B can comprise rows 7 of tufts of bristles 6.

[0334] There may be free spaces 8 between each row 7 of tufts of bristles 6.

[0335] The rows 7 of tufts of bristles 6 may be parallel to each other.

[0336] Thus, the hair keratin fibers may be arranged between the tufts of bristles so as to form waves.

[0337] The rows 7 of tufts of bristles 6 of the active face 4 of arm A are complementary to the rows 7 of tufts of bristles 6 of the active face 4 of arm B. To use the tongs, the user can place a lock of hair keratin fibers between the arms A and B at their active parts when the tongs are in the spread-open position (i.e. the active parts 3 are at a distance from each other).

[0338] The user then applies a pressing force to the tongs so as to bring the tongs into the brought-together position (i.e. the active parts are brought towards each other).

[0339] When the active parts are brought close together, said bristles of arms A and B interpenetrate so as to enclose said hair keratin fibers without blocking it.

[0340] The user can slide the tongs along the lock, i.e. from the root to the tip of the lock, while maintaining a certain pressing force.

[0341] Repeated passage of the tongs along the locks of hair keratin fibers may be performed.

[0342] Such tongs are sold, for example, under the reference Brosse Pince Ceramik Defrisage from the company Anself.

[0343] Protocol

[0344] The hair keratin fibers dye composition described above may be used on wet or dry hair keratin fibers, and also on any type of hair keratin fibers, whether light or dark, natural or dyed, permed, bleached or relaxed.

[0345] Preferably, a washing, rinsing, draining or drying step is performed after the application of the dye composition to the hair keratin fibers.

[0346] The application of the dye composition to the hair keratin fibers is generally performed at room temperature (between 15 and 25°C).

[0347] According to a preferred embodiment, the application of the hair keratin fibers dye composition to the hair keratin fibers is performed at a temperature of between 15 and 50°C, more preferentially between 20 and 40°C.

[0348] After applying the dye composition to the hair keratin fibers, it is possible to wait for between 1 minute and 6 hours, in particular between 1 minute and 2 hours, more particularly between 1 minute and 1 hour, more preferentially between 1 minute and 30 minutes, before, for example, applying composition D to the hair keratin fibers or, for example, a washing, rinsing, draining or drying step.

[0349] Preferably, there is no leave-on time after the application of the dye composition to the hair keratin fibers.

[0350] After applying the dye composition, the fibers may be left to dry or may be dried, for example at a temperature of greater than or equal to 30°C.

[0351] The process according to the invention may thus comprise a step of applying heat to the hair keratin fibers using a heating tool.

[0352] The heat application step of the process of the invention may be performed using a hood, a hairdryer, a straightening iron, a curling iron, a Climazon hood, etc. Preferably, the heat application step of the process of the invention is performed using a hairdryer.

[0353] When the process of the invention involves a step of applying heat to the hair keratin fibers, the step of applying heat to the hair keratin fibers takes place after applying the hair keratin fibers dye composition to the hair keratin fibers.

[0354] During the step of applying heat to the hair keratin fibers, a mechanical action may be exerted on the locks, such as combing, brushing or running the fingers through.

[0355] When the step of applying heat to the hair keratin fibers is performed using a hood or a hairdryer, the temperature is preferably between 30°C and 110°C, preferentially between 50°C and 90°C.

[0356] When the step of applying heat to the hair keratin fibers is performed using a straightening iron, the temperature is preferably between 110°C and 220°C, preferably between 140°C and 200°C.

[0357] In a particular variant, the process of the invention involves a step (bl) of applying heat using a hood, a hairdryer or a Climazon hood, preferably a hairdryer, and a step (b2) of applying heat using a straightening or curling iron, preferably a straightening iron.

[0358] Step (bl) may be performed before step (b2).

[0359] During step (bl), also referred to as the drying step, the hair keratin fibers may be dried, for example at a temperature above or equal to 30°C. According to a particular embodiment, this temperature is above 40°C. According to a particular embodiment, this temperature is above 45°C and below 110°C.

[0360] Preferably, if the hair keratin fibers are dried, they are dried, in addition to a supply of heat, with a flow of air. This flow of air during drying makes it possible to improve the strand separation of the coating.

[0361] During the drying, a mechanical action may be exerted on the locks, such as combing, brushing or running the fingers through.

[0362] During step (b2), the passage of the straightening or curling iron, preferably the straightening iron, may be performed at a temperature ranging from 110°C to 220°C, preferably between 140°C and 200°C.

[0363] After the heating step, a shaping step may be performed, for example with a straightening iron; the temperature for the shaping step is between 110 and 220°C, preferably between 140 and 200°C.

[0364] Preferably, the step of applying the dye composition to the hair keratin fibers is repeated several times.

[0365] The process of the invention is a process for treating hair keratin fibers comprising: - a step of dyeing the hair keratin fibers by applying a composition comprising at least one (poly)carbodiimide compound, at least one pigment and at least one polymer comprising at least one reactive group chosen from the carboxylic acids, to obtain dyed hair keratin fibers; and

[0366] - a step of removing the colour from said dyed hair keratin fibers by applying a colourremoving composition comprising at least one alkyl or alkylene carbonate and at least one fatty acid.

[0367] The time between the step of applying the hair keratin fibers dye composition and the step of applying the colour-removing composition may range from a few minutes to several days, for example several tens of days. Preferably, the time between the step of applying the hair keratin fibers dye composition and the step of applying the colour-removing composition ranges from 1 hour to 30 days, more preferentially at least 1 day, more preferentially at least 15 days.

[0368] The composition for removing colour from the fibers is preferably generally left on for 30 seconds to 60 minutes, preferentially from 1 to 40 minutes, more preferentially from 1 to 30 minutes and better still from 2 to 20 minutes.

[0369] According to a particular embodiment, the process according to the invention also comprises a step of massaging the hair keratin fibers, after the application of the colour-removing composition. This massaging step may be performed using the fingers or a massaging aid.

[0370] During this massaging step, a particular tool such as an exfoliating glove may be used.

[0371] Preferably, during a massaging step, the fingers are passed along the lock at least five times. The total duration of the five passes may range from 30 seconds to 2 minutes, for example, per 1 g of lock.

[0372] The step of massaging the hair keratin fibers may be repeated several times, for example twice, optionally with an intermediate leave-on time.

[0373] The step of applying the colour-removing composition may be repeated several times, optionally with intermediate rinsing.

[0374] The optional massaging step may subsequently be followed by a step of washing the hair keratin fibers, for example using a shampoo. The hair keratin fibers may then be massaged, rinsed and dried.

[0375] According to a preferred embodiment, the process according to the invention comprises a step of applying tongs as described previously to the hair keratin fibers after the colour-removing composition has been applied to the hair keratin fibers. Preferably, there is no step of washing, rinsing, draining or drying the hair keratin fibers between the application of the colour-removing composition and the application of the tongs as described previously.

[0376] Following the application of a colour-removing composition as described above, the process according to the invention comprises the application to said hair keratin fibers of tongs as described previously.

[0377] Preferably, the tongs as described previously are applied from the root to the tip of the hair keratin fibers.

[0378] Preferably, the tongs as described previously are applied from 10 to 150 times along the length of the hair keratin fibers, and more preferentially, the tongs as described previously are applied from 10 to 100 times along the length of the hair keratin fibers.

[0379] The tongs as described previously may be applied to wet or dry hair keratin fibers.

[0380] Preferably, the tongs as described previously are applied to wet hair keratin fibers. Preferably, the hair keratin fibers are moistened with the colour-removing composition, and then after a delay of 1 to 30 min, preferably 1 to 15 min, the tongs are applied to the hair keratin fibers.

[0381] The step of applying the tongs as described previously may then be followed by a step of washing the hair keratin fibers, for example with a shampoo. The hair keratin fibers may then be massaged, rinsed and dried.

[0382] Preferably, the process according to the invention comprises a step of washing the hair keratin fibers, for example with a shampoo, following the application of the tongs to the hair keratin fibers.

[0383] Preferably, the process for treating hair keratin fibers according to the invention comprises: i) a step of dyeing the hair keratin fibers by applying to the hair keratin fibers the hair keratin fibers dye composition as described above, and then ii) optionally a leave-on time of said dyeing composition on the fibres of from 1 minute to 30 minutes, preferably from 1 to 20 minutes, then iii) optionally a step of washing, rinsing, draining or drying said hair keratin fibers; and then iv) a colour-removing step comprising the application, to hair keratin fibers previously dyed in step (i), of the colour-removing composition as described above, v) optionally, a step of massaging the hair keratin fibers, preferably at the hair keratin fibers roots, vi) optionally a leave-on time of said dye composition on the fibers of from 1 minute to 30 minutes, preferably from 1 to 20 minutes, and then vii) the application to the hair keratin fibers of one or more passes of tongs as described above, and then viii) optionally a step of washing, rinsing, draining or drying the hair keratin fibers.

[0384] Multi-compartment device (kit)

[0385] The present invention also relates to a device for dyeing and removing colour from the hair keratin fibers, comprising several compartments containing:

[0386] - in a first compartment, a composition A comprising: at least one (poly)carbodiimide compound as described previously;

[0387] - in a second compartment, a composition B comprising at least pigment as described previously, and at least one polymer comprising at least one reactive group chosen from the carboxylic acids, preferably at least one acrylic polymer as defined previously;

[0388] - in a third compartment, a composition for removing colour from the hair keratin fibers, comprising at least one alkyl or alkylene carbonate as described previously and at least one fatty acid as described previously; and optionally

[0389] - tongs as described previously.

[0390] The present invention will now be described more specifically by means of examples, which do not in any way limit the scope of the invention. However, the examples make it possible to support specific features, variants and preferred embodiments of the invention.

[0391] EXAMPLES

[0392] The (poly)carbodiimide(s) of the invention are accessible via synthetic methods known to those skilled in the art starting from commercial products or reagents that can be synthesized according to chemical reactions that are also known to those skilled in the art. Mention may be made, for example, of the book Sciences of Synthesis - Houben - Weyl Methods of Molecular Transformations, 2005, Georg Thiem Verlag Kg, Rudigerstrasse 14, D-70469 Stuttgart, or the American patent US 4284 730 or the Canadian patent application CA 2 509 861.

[0393] More particularly, the process for preparing the (poly)carbodiimides of the invention involves, in a first step, a diisocyanate reagent (1):

[0394] O=C=N-Li-N=C=O (1), in which formula (1) Li is as defined previously, which reacts in the presence of a carboimidation catalyst (2) such as those described in US 4 284 730, notably phosphorus-based catalysts particularly chosen from phospholene oxides and phospholene sulfoxides, diaza- and oxaza-phospholanes, preferably under an inert atmosphere (nitrogen or argon), and in particular in a polar solvent which is preferably aprotic such as THF, glyme, diglyme, 1,4-di oxane or DMF, at a temperature between room temperature and the reflux temperature of the solvent, preferably at about 140°C; to give the carbodiimide diisocyanate compound (3): O=C=N-Li-(N=C=N-Li)n-N=C=O (3), in which formula (3) Li and n are as defined previously. Benzoyl halogen such as benzoyl chloride may be added to deactivate the catalyst.

[0395] To obtain “symmetrical” (poly)carbodiimides, during the second step of the preparation process, compound (3) reacts with 1 molar equivalent (1 eq.) of nucleophilic reagent Ri-Xi-H and then 0.5 eq. of reagent H-E-H with Ri, Xi and E as defined previously, to give the “symmetrical” compound (4) according to the invention:

[0396] [Ri-Xi-C(O)-NH-Li-(N=C=N-Li)n-NH-C(O)]2-E (4), in which formula (4) Ri, Xi, Li, n and E are as defined previously. According to one variant to obtain compound (4) from (3), it is possible first to add 0.5 eq. of reagent H-E-H and then 1 eq. of reagent Ri-Xi-H.

[0397] To obtain “dissymmetrical” (poly)carbodiimides, during the second step of the preparation process, compound (3) reacts with 1 molar equivalent (1 eq.) of nucleophilic reagent Ri-Xi-H and then 1 eq. of reagent H-E-H with Ri, Xi and E as defined previously, to give compound (5):

[0398] Ri-Xi-C(O)-NH-Li-(N=C=N-Li)n-NH-C(O)-E-H (5), in which formula (5) Ri, Xi, Li, n and E are as defined previously.

[0399] According to one variant to obtain compound (5) from (3), it is possible first to add 1 eq. of reagent Ri-Xi-H and then 0.5 eq. of reagent H-E-H.

[0400] During a third step, compound (5) reacts with 1 eq. of compound (6)

[0401] R2-X2-C(O)-NH-LI-(N=C=N-LI)Z-N=C=O (6), said compound (6) is prepared beforehand from compound (3’):

[0402] O=C=N-Li-(N=C=N-Li)z-N=C=O (3’), in which formula (3’) Li and z are as defined previously, which reacts with 1 eq. of nucleophilic reagent R2-X2-H with Li, R2, X2 and z as defined previously, to give the dissymmetrical compound (7):

[0403] Ri-Xi-C(O)-NH-Li-(N=C=N-Li)n-NH-C(O)-E-C(O)-NH-Li-(N=C=N-Li)z- NH-C(O)-X2-R2(7), in which formula (7) Ri, Xi, Li, R2, X2, n, z and E are as defined previously.

[0404] It is also possible to react 1 molar equivalent of compound O=C=N-Li-(N=C=N-Li)z- N=C=O (3’) with 1 / w molar equivalent of H-E-H, followed by 1 eq. of nucleophilic reagent R2-X2-H to give compound (8): H-[E-C(O)-NH-L1-(N=C=N-L1)Z]W-NH-C(O)-X2-R2(8), in which formula (8) Li, R2, X2, z and E are as defined previously, and w is an integer between 1 and 3; more preferentially, w = 1.

[0405] This last compound (8) can then react with 1 eq. of compound (4’):

[0406] Ri-Xi-C(O)-NH-Li-(N=C=N-Li)n-N=C=O (4’), (said compound (4’) being able to be synthesized by reaction of 0.5 eq. of nucleophilic reagent Ri-Xi-H with 1 equivalent of compound (3)), to give the (poly)carbodiimide (9) of the invention:

[0407] Ri-Xi-C(O)-NH-Li-(N=C=N-Li)n-NH-C(O)-[E-C(O)-NH-Li-(N=C=N- Li)z]w-NH C(O)-X2-R2(9), in which formula (9) Li, Ri, Xi, R2, X2, n, z, w and E are as defined previously.

[0408] The (poly)carbodiimide compounds, and similarly all the reaction intermediates and reagents, may be purified via conventional methods known to those skilled in the art, such as extraction with water and water-immiscible organic solvent, precipitation, centrifugation, filtration and / or chromatography.

[0409] Example 1: Process for synthesizing the (poly)carbodiimide compound

[0410] 50 g of 4,4’ -di cyclohexylmethane diisocyanate and 0.5 g of 4,5-dihydro-3- methyl-1 -phenyl- IH-phosphole 1-oxide were placed with stirring in a 500 mL threenecked round-bottomed flask equipped with a thermometer, a stirrer and a reflux tube.

[0411] The reaction medium was heated at 140°C under nitrogen for 4 hours, the reaction being monitored by infrared spectroscopy by means of the absorption of the isocyanate functions between 2200 and 2300 cm’1, and then cooled to 120°C.

[0412] A mixture of 5.3 g of polyethylene glycol monomethyl ether and 1.2 g of 1,4- butanediol are introduced with stirring into the reaction medium. The temperature of 120°C is maintained until the isocyanate functions have totally disappeared, monitored by infrared spectroscopy at 2200-2300 cm’1, and is then cooled to room temperature.

[0413] After cooling to room temperature, the reaction medium is poured dropwise with vigorous stirring into a 500 mL glass beaker containing 85 g of distilled water, to give the desired product in the form of a translucent yellow liquid.

[0414] Example 2

[0415] The compositions as described below were prepared: the amounts are expressed as g of starting material as obtained / 100 g, unless otherwise mentioned. Dye composition:

[0416] [Table 1]

[0417] (1) synthesized according to the synthetic process described in Example 1 (containing 40% active material in water),

[0418] (2) sold by the company SEPPIC under the name Sepinov EMTIO (containing 90% active material),

[0419] (3) sold by the company Wacker under the name Belsil ADM LOG 1 (containing 15% active material).

[0420] [Table 2]

[0421] (4) sold by the company Daito Kasei Kogyo under the trade name Daitosol 3000SLPN- PE1 (aqueous dispersion containing 30% active material)

[0422] (5) sold by the company Rohm & Haas under the trade name Aculyn 22® (oxyalkylenated methacrylic acid / ethyl acrylate / stearyl methacrylate terpolymer containing 30% active material). Composition A is mixed with composition B in a 50 / 50 mass ratio to obtain the dye composition C.

[0423] Next, composition D as described below was prepared: the amounts are expressed as g of starting material as obtained / 100 g.

[0424] [Table 3]

[0425] (6) sold by the company Momentive Performance Materials under the trade name Silform INX.

[0426] Colour-removing composition:

[0427] In parallel, a colour-removing composition was prepared and is described in the table below: the amounts are expressed as g of starting material as obtained / 100 g.

[0428] [Table 4]

[0429] (7) sold by the company Clariant under the trade name Hostacerin AMPS.

[0430] Protocol for colouring locks of hair keratin fibers:

[0431] Dyeing composition C is applied using a small brush to locks of dry natural hair keratin fibers containing 90% white hair keratin fibers, at an amount of 0.8 g of composition per gram of lock. The locks of hair keratin fibers are then disentangled and dried with a hairdryer at medium heat and power. Next, composition D is applied to said locks of hair keratin fibers previously treated with composition C, at an amount of 0.5 g of composition per gram of lock.

[0432] The locks of hair keratin fibers are then disentangled and dried with a hairdryer at medium heat.

[0433] The locks of hair keratin fibers are then subjected to a process of accelerated ageing by placing them in an oven at a temperature of 60°C for 48 hours before applying the colour-removing composition.

[0434] This step of accelerated ageing makes it possible to simulate the natural ageing of the coloured coating on the hair keratin fibers in vivo, this ageing corresponds to 2 weeks at room temperature in vivo. This protocol is referred to as Protocol 1.

[0435] According to another example, the locks are treated as described above but without the application of composition D. This protocol is referred to as protocol 2.

[0436] Colour-removing protocol:

[0437] Various processes for removing the colour from locks dyed with composition C + D were performed:

[0438] - a process 1 in which the colour-removing composition El is applied to the locks of hair keratin fibers dyed according to protocol 1 or protocol 2;

[0439] - a process 2 in which the colour-removing composition El is applied to the locks of hair keratin fibers dyed according to protocol 1 or protocol 2, followed by the application of the tongs as described above to the locks of hair keratin fibers (Brosse Pince Ceramik Defrisage from the company Anself).

[0440] In process 1, the colour-removing composition El is applied to a dyed lock of hair keratin fibers, by finger, at a rate of 2 g of composition per g of lock.

[0441] The lock is then combed 6 times using a comb, so as to spread composition El evenly over the lock of hair keratin fibers.

[0442] The lock of hair keratin fibers is left for 1 min at room temperature and the shampoo washing protocol described below is then performed.

[0443] In process 2, the colour-removing composition El is applied to a dyed lock of hair keratin fibers, by finger, at a rate of 2 g of composition per g of lock.

[0444] The lock is then combed 6 times using a comb, so as to spread composition El evenly over the lock of hair keratin fibers.

[0445] The lock of hair keratin fibers is then gripped between arms A and B of the tongs according to the invention, and 20 passes of the tongs along the lock of hair keratin fibers, from the root to the tip, are then performed. The shampoo washing protocol described below is then performed.

[0446] Shampoo washing protocol

[0447] A standard shampoo (L’Oreal Paris Elseve) is applied uniformly to the dyed locks, at a rate of 0.4 g of standard shampoo per gram of locks, the locks of hair keratin fibers being massaged gently along their length (six passes) for 15 seconds, from the root to the end.

[0448] The locks of hair keratin fibers are combed, moistened with water at 35°C and then passed between the fingers five times for 5 seconds. The locks of hair keratin fibers are then squeezed dry between two fingers.

[0449] The locks of hair keratin fibers are then placed on a watch glass and left to stand for 1 minute.

[0450] Next, the locks of hair keratin fibers are rinsed with water while passing the locks between the fingers (15 passes). The locks of hair keratin fibers are then squeezed dry between two fingers before the next shampoo wash.

[0451] The locks of hair keratin fibers are combed and dried with a hairdryer.

[0452] Results

[0453] The persistence of the colour of the locks was evaluated in the CIE L*a*b* system, using a Minolta Spectrophotometer CM3600A colorimeter (illuminant D65, angle 10°, specular component included).

[0454] In this L*a*b* system, L* represents the intensity of the colour, a* indicates the green / red colour axis and b* the blue / yellow colour axis.

[0455] The persistence of the colouring is evaluated by the colour difference AE between the dyed locks before the step of removing the colour, then after having undergone the protocol for removing the colour from previously dyed locks of hair keratin fibers described above. The lower the value of AE, the more the colour is persistent in the face of the protocol for removing the colour from previously dyed locks of hair keratin fibers described above.

[0456] The AE value is calculated according to the following equation: [Math.l]

[0457] In this equation, L*a*b* represent the values measured after dyeing the hair keratin fibers and after the colour removal step, and L0*a0*b0* represent the values measured after dyeing the hair keratin fibers but before the colour removal step. [Table 5]

[0458] It is thus found that the process for treating hair keratin fibers according to the invention has colour-removing power on the hair keratin fibers, this colour removal moreover being substantially enhanced when the colour-removing composition comprising alkylene carbonate and the fatty acid is combined with the use of the tongs.

[0459] This process remained effective in the presence of a post-treatment, by applying composition D, to the dye composition, the post-treatment being present to reinforce the resistance of the colour between the application of the colour and the removal of this colour at the desired time by the user.

[0460] Example 3

[0461] In this example, the dye compositions C described previously is applied using a small brush to locks of dry natural hair keratin fibers containing 90% white hair keratin fibers strands, at a rate of 0 8 g of composition per gram of lock. The locks of hair keratin fibers are then disentangled and dried with a hairdryer at medium heat and power.

[0462] In this example, there is no application of composition D (Protocol 2).

[0463] The locks thus dyed are treated according to the protocol described in Example 2. The locks of hair keratin fibers are subjected to an accelerated ageing process by placing them in an oven at a temperature of 60°C for 48 hours before applying the colour-removing composition.

[0464] This step of accelerated ageing makes it possible to simulate the natural ageing of the coloured coating on the hair keratin fibers in vivo, this ageing corresponds to 2 weeks at room temperature in vivo. The hair keratin fibers colour is then removed according to the protocol described in Example 2 / process 2 (application of the colour-removing composition followed by passage of the tongs) using the following comparative composition R1 or using composition El as described previously (invention).

[0465] [Table 6]

[0466] [Table 7] It is found that the process for treating hair keratin fibers according to the invention has substantial colour-removing power on hair keratin fibers with the colourremoving composition according to the invention and the use of tongs.

[0467] Thus, the process for treating hair keratin fibers according to the invention makes it possible to obtain effective removal of colour from a lock of hair keratin fibers previously dyed using a hair keratin fibers dye composition comprising at least one (poly)carbodiimide compound, at least one pigment and at least one polymer comprising at least one reactive group chosen from the carboxylic acids.

Claims

CLAIMS1. Process for treating hair keratin fibers comprising :- a step of dyeing the hair keratin fibers by applying a composition comprising at least one (poly)carbodiimide compound, at least one pigment and at least one polymer comprising at least one reactive group chosen from the carboxylic acids, to obtain dyed hair keratin fibers; and- a step of removing the colour from said dyed hair keratin fibers by applying a colourremoving composition comprising at least one alkyl or alkylene carbonate and at least one fatty acid.

2. Process according to Claim 1, comprising an additional step after the step of removing the colour, which comprises the application to the hair keratin fibers of tongs (1) comprising two arms A and B between which the hair keratin fibers pass, each arm A and B comprising a supporting part (2) and an active part (3), said arms A and B being movable between a spaced-apart position in which the active parts (3) are at a distance from each other, and a brought-together position in which the active parts (3) are brought towards each other, said active parts (3) comprising an active face (4) and an opposite face (5), said active face (4) having bristles (6), in which, when the active parts (3) are close together, said bristles (6) of arms A and B interpenetrate so as to grip the hair keratin fibers without blocking it.

3. Process according to Claim 1 or 2, characterized in that the (poly)carbodiimide compound(s) are chosen from the compounds of formula (I) below:(I), in which:- Xi and X2 independently represent an oxygen atom O, a sulfur atom S or an NH group;- Ri and R2 independently represent a group chosen from a hydrocarbon-based radical, preferably alkyl, optionally interrupted with one or more heteroatoms, a group chosen from alkoxysilyl, hydroxysilyl, acetoxysilyl, vinylsilyl, acrylalkylsilyl, methacrylalkylsilyl, crotonylalkylsilyl, carboxyanhydridoalkylsilyl, carboxyalkylsilyl, hydroxy alkyl silyl, aldehydoalkylsilyl, mercaptoalkyl silyl, norbornenylsilyl,acylpentadienylalkylsilyl, maleimidoalkylsilyl, sulfonylalkylsilyl, (meth)acrylalkyl, crotonylalkyl, alkylepoxide such as propylepoxide or butylepoxide and azacyclopropane groups, and a hydrocarbon-based radical, preferably alkyl, optionally interrupted with one or more heteroatoms and with one or more groups chosen from alkoxysilyl, hydroxysilyl, acetoxysilyl, vinylsilyl, acrylalkylsilyl, methacrylalkylsilyl, crotonylalkylsilyl, carboxyanhydridoalkylsilyl, carboxyalkylsilyl, hydroxyalkylsilyl, aldehydoalkylsilyl, mercaptoalkyl silyl, norbornenylsilyl, acylpentadienylalkylsilyl, maleimidoalkylsilyl, sulfonylalkylsilyl, (meth)acrylalkyl, crotonylalkyl, alkylepoxide such as propylepoxide or butylepoxide and azacyclopropane groups; - n denotes an integer ranging from 1 to 1000; and- A is a monomer chosen from the compounds below:

4. Process according to Claim 1 or 2, characterized in that the (poly)carbodiimide compound(s) are chosen from the compounds of formula (II) below:(n), in which:- Xi and X2 independently represent an oxygen atom O, a sulfur atom S or an NH group;- Ri and R2 independently represent a hydrocarbon-based radical optionally interrupted with one or more heteroatoms;- n and z denote an integer ranging from 1 to 20, with n+z > 2 and w denotes an integer ranging from 1 to 3;- Li independently represents a Ci-Cis divalent aliphatic hydrocarbon-based radical, a C3-C15 cycloalkylene radical, a C3-C12 heterocycloalkylene group or a Ce-Cu arylene group, and mixtures thereof;- E independently represents a group chosen from:-0-R3-0-; -S-R4-S-; -R5-N(R6)-R4-N(R6)-R5-, in which R3 and R4 independently represent a divalent hydrocarbon-based radical optionally interrupted with one or more heteroatoms;- R5 independently represents a covalent bond or a saturated divalent hydrocarbonbased radical, optionally interrupted with one or more heteroatoms;- Re independently represents a hydrogen atom or a hydrocarbon-based radical, optionally interrupted with one or more heteroatoms.

5. Process according to Claim 4, characterized in that the (poly)carbodiimide compound(s) are chosen from the compounds of formula (II) in which:- Xi and X2 independently represent an oxygen atom;- Ri and R2 are independently chosen from dialkylamino alcohols, alkyl esters of hydroxycarboxylic acid and monoalkyl ethers of (poly)alkylene glycol, in which a hydroxyl group has been removed, and mixtures thereof;- n and z denote an integer ranging from 1 to 20, with n+z > 2 and w is equal to 1;- LI is chosen from a Ci-Cis divalent aliphatic hydrocarbon-based radical, a C3-C15 cycloalkylene radical, a C3-C12 heterocycloalkylene group or a C6-C14 arylene group, and mixtures thereof;- E independently represents a group chosen from:- -0-R3-0-; -S-R4-S-; -R5-N(R6)-R4-N(R6)-R5-; in which R3 and R4 are independently chosen from a Ce-Cu arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Cis alkylene radical, optionally interrupted with one or more heteroatoms, and mixtures thereof;- when R5 is not a covalent bond, Rs is chosen from a Ce-Cw arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Cis alkylene radical, optionally interrupted with one or more heteroatoms, and mixtures thereof; and- Re is chosen from a Ce-Cu arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Cis alkylene radical, optionally interrupted with one or more heteroatoms, and mixtures thereof.

6. Process according to Claim 4 or 5, characterized in that the (poly)carbodiimide compound(s) are chosen from the compounds of formula (II) in which:- Xi and X2 independently represent an oxygen atom;- Ri and R2 are, independently, monoalkyl ethers of (poly)alkylene glycol, in which a hydroxyl group has been removed;- n and z denote an integer ranging from 1 to 20, with n+z > 2 and w is equal to 1;- Li is a C3-C15 cycloalkylene radical;- E independently represents a group chosen from :-O-R3-O-; -S-R4-S-; -R5-N(R6)-R4-N(R6)-R5-; in which R3 and R4 are independently chosen from a C6-C14 arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Cis alkylene radical, optionally interrupted with one or more heteroatoms, and mixtures thereof;- when R5 is not a covalent bond, R5 is chosen from a Ce-Cw arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Cis alkylene radical, optionally interrupted with one or more heteroatoms, and mixtures thereof; and- Re is chosen from a Ce-Cu arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Cis alkylene radical, optionally interrupted with one or more heteroatoms, and mixtures thereof.

7. Process according to any one of Claims 4 to 6, characterized in that the (poly)carbodiimide compound(s) are chosen from the compounds of formula (II) in which:- Xi and X2 independently represent an oxygen atom;- Ri and R2 independently represent the compound of formula (VI) below:Ri3-[O-CH2-C(H)(Ri4)]q- (VI), in which R13 represents a C1-C4 alkyl group or a phenyl, preferably a C1-C4 alkyl group, more preferentially a methyl, R14 represents a hydrogen atom or a C1-C4 alkyl group, preferably a hydrogen atom and q denotes an integer ranging from 4 to 30;- n and z denote an integer ranging from 2 to 20, with n+z ranging from 4 to 10 and w is equal to 1 ;- Li is a C3-C15 cycloalkylene radical such as cyclopentylene, cycloheptylene, cyclohexylene and 4, 4-di cyclohexylenemethane; and- E represents a group -O-R3-O- in which R3 is chosen from a C6-C14 arylene radical, a C3-C12 cycloalkylene radical, a linear or branched Ci-Cis alkylene radical, optionally interrupted with one or more heteroatoms, and mixtures thereof.

8. Process according to any one of Claims 4 to 7, characterized in that the (poly)carbodiimide compound(s) are chosen from the compounds of formula (II) in which:- Xi and X2 independently represent an oxygen atom;- Ri and R2 independently represent the compound of formula (VI) below:Ri3-[O-CH2-C(H)(Ri4)]q- (VI), in which R13 represents a C1-C4 alkyl group or a phenyl, preferably a C1-C4 alkyl group, more preferentially a methyl, R14 represents a hydrogen atom or a C1-C4 alkyl group, preferably a hydrogen atom and q denotes an integer ranging from 4 to 30;- n and z denote an integer ranging from 2 to 20, with n+z ranging from 4 to 10 and w is equal to 1 ,- Li is a C3-C15 cycloalkylene radical such as cyclopentylene, cycloheptylene, cyclohexylene and 4,4-dicyclohexylenemethane, preferably 4,4- dicyclohexylenemethane; and- E represents a group -O-R3-O- in which R3 represents a linear or branched Ci-Cis alkylene radical such as methylene, propylene, butylene or ethylene, optionally interrupted with one or more heteroatoms.

9. Process according to any one of Claims 4 to 8, characterized in that the (poly)carbodiimide compound(s) are chosen from the compounds of formula (XII) below:in which Li is 4,4-dicyclohexylenemethane, n and z denote an integer ranging from 2 to 20, with n+z ranging from 4 to 10, E represents a group -O-R3-O- in which R3 represents a linear or branched Ci-Cis alkylene radical such as methylene, propylene, butylene or ethylene, optionally interrupted with one or more heteroatom(s), and r and s denote an integer ranging from 4 to 30.

10. Process according to any one of the preceding claims, characterized in that the total amount of the (poly)carbodiimide compound(s) ranges from 0.01% to 20% by weight, preferably from 0.1% to 15% by weight, more preferentially from 0.2% to 10% by weight, even more preferentially from 0.5% to 8% by weight, better still from 1% to 6% by weight relative to the total weight of the dyeing composition.

11. Process according to any one of the preceding claims, characterized in that the total amount of pigment(s) ranges from 0.05% to 20% by weight, preferably from 0.1% to 15% by weight and more preferably from 0.5% to 10% by weight relative to the total weight of the dyeing composition.

12. Process according to any one of the preceding claims, characterized in that the polymer comprising at least one reactive group chosen from the carboxylic acids is an acrylic polymer.

13. Process according to any one of the preceding claims, characterized in that the alkyl or alkylene carbonate is a C1-C30, preferably Ci-Ce alkyl carbonate or C1-C30, preferably Ci-Ce alkylene carbonate; more preferentially, the alkyl or alkylene carbonate is chosen from alkylene carbonates, better still from propylene carbonate, butylene carbonate, pentylene carbonate and mixtures thereof.

14. Process according to any one of the preceding claims, characterized in that the total content of alkyl or alkylene carbonate ranges from 20% to 60% by weight, preferably from 30% to 50% by weight, more preferentially from 35% to 45% by weight relative to the total weight of the colour-removing composition.

15. Process according to any one of the preceding claims, characterized in that the fatty acid(s) are chosen from fatty acids including at least one carboxylic acid group and a linear or branched, saturated or unsaturated alkyl chain comprising from 10 to 30 carbon atoms, preferably from 14 to 22 carbon atoms, more preferentially chosen from liquid fatty acids, better still chosen from oleic acid, linoleic acid, arachidonic acid and mixtures thereof.

16. Process according to any one of the preceding claims, characterized in that the total fatty acid content ranges from 0.1% to 25% by weight, preferably 0.5% to 20% by weight, preferentially 1% to 15% by weight, better still 4% to 10% by weight relative to the total weight of the colour-removing composition.

17. Process according to any one of Claims 2 to 16, characterized in that the two arms A and B are articulated about an articulation axis (Z) and move angularly towards each other so that the active parts (3) of arms A and B are in contact with each other.

18. Process according to any one of Claims 2 to 17, characterized in that said bristles (6) are arranged in the form of tufts of bristles, preferably made of a natural material, such as natural silks, or animal bristles, such as squirrel, boar or goat bristles.

19. Process according to Claim 18, characterized in that the active faces of arms A and B have rows (7) of tufts of bristles (6) separated by free spaces (8), the rows (7) of tufts of bristles (6) of the active parts (3) being arranged parallel to each other.

20. Process according to any one of Claims 2 to 19, characterized in that it comprises a step of washing the hair keratin fibers, for example with a shampoo, following application of the tongs to the hair keratin fibers.

21. Device for dyeing and removing colour from the hair keratin fibers, comprising several compartments containing:- in a first compartment, a composition A comprising at least one (poly)carbodiimide compound as defined in any one of Claims 1 and 3 to 9;- in a second compartment, a composition B comprising at least one pigment as defined in Claim 1 and at least one polymer comprising at least one reactive group chosen from the carboxylic acids as defined in Claim 1 and 12;- in a third compartment, a composition for removing colour from the hair keratin fibers, comprising at least one alkyl or alkylene carbonate and at least one fatty acid as defined in any one of Claims 1 and 13 to 16; and optionally- tongs (1) as defined in any one of Claims 2 and 17 to 19.

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