A hair coloring process comprising the application of a composition A comprising two alkoxysilanes, and the application of a composition B comprising a film-forming polymer

Abstract

A hair coloring process comprising the application of a composition A comprising two alkoxysilanes, and the application of a composition B comprising a film-forming polymer. The present invention relates to a process for coloring keratin fibers such as hair, comprising the application to the keratin fibers of at least one composition A comprising at least one alkoxysilane selected from compounds of formula (I) or formula (I') and at least one alkoxysilane of formula (II), and the application to the keratin fibers of at least one composition B comprising at least one film-forming polymer. Said composition A and / or composition B comprise at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (I'), or (II).

Description

Title of the invention: A hair coloring process comprising the application of a composition A comprising two alkoxysilanes, and the application of a composition B comprising a film-forming polymer Technical field of the invention

[0001] The present invention relates to a method for coloring keratin fibers such as hair, comprising applying to the keratin fibers at least one composition A comprising at least one alkoxysilane selected from compounds of formula (I) or formula (I') and at least one alkoxysilane of formula (II), and applying to the keratin fibers at least one composition B comprising at least one film-forming polymer. Said composition A and / or composition B comprise at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (I'), or (II). Context of the invention

[0002] In the field of staining keratin fibers, particularly human fibers, it is already known to stain keratin fibers by different techniques from direct dyes or pigments for non-permanent staining or from dye precursors for permanent staining. There are essentially three types of hair coloring processes:

[0003] a) so-called permanent coloring which has the function of bringing about a significant change in the natural color and which uses oxidation dyes which penetrate the hair fiber and form the dye by a process of oxidative condensation; b) non-permanent, semi-permanent or direct coloring, which does not implement the oxidative condensation process and resists 4 or 5 shampoos; consists of dyeing the keratin fibers with dye compositions containing direct dyes. c) Temporary hair coloring, which results in a change to the natural hair color that lasts from one shampoo to the next and serves to enhance or correct an existing shade. It can also be considered a "makeup" procedure. For this last type of coloring, it is known to use pigments. Indeed, the use of pigment on the surface of keratin fibers generally makes it possible to obtain visible colors on dark hair since the pigment on the surface masks the natural color of the fiber. However, the colors obtained by this staining method present The disadvantage is having low resistance to shampoos as well as to external agents such as sebum, perspiration, brushing and / or friction.

[0004] There therefore remains a need for a process of coloring keratin fibers, in particular hair, which has the advantage of obtaining a homogeneous and smooth colored coating on the hair, while forming a coating that is resistant to shampoos and to the various aggressions that hair can undergo, such as brushing and / or rubbing, without damaging the hair.

[0005] Thus, the aim of the present invention is to develop a process for coloring keratin fibers, in particular hair, which has the advantage of obtaining a homogeneous and smooth colored coating on the hair, while forming a coating that is resistant to shampoos and to the various aggressions that hair can undergo, such as brushing and / or rubbing, without damaging the hair.

[0006] The applicant has surprisingly discovered that all of these objectives can be achieved by the process according to the present invention. Summary of the invention

[0007] The present invention relates to a method for coloring keratin fibers such as hair, comprising the following steps: a) the application to keratin fibers of at least one composition A comprising: - at least one alkoxysilane selected from the compounds of formula (I) or formula (I') as described below, their oligomers and / or mixtures thereof, and - at least one alkoxysilane of formula (II) as described below, its oligomers and / or mixtures thereof, and b) the application to keratin fibers of at least one composition B comprising at least one film-forming polymer, composition A and / or composition B comprising at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (I') or (II) as described below.

[0008] The present invention also relates to a coloring kit for keratin fibers such as hair, comprising several compartments containing: - in a first compartment, a composition A comprising: - at least one alkoxysilane selected from the compounds of formula (I) or formula (I') as described below, their oligomers and / or mixtures thereof, and - at least one alkoxysilane of formula (II) as described below, its oligomers and / or mixtures thereof, - in a second compartment, a composition B according to the invention comprising at least one film-forming polymer, composition A and / or composition B comprising at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (!') or (II) as described below.

[0009] By using this process, colored coatings are obtained on the hair which are permanent against shampoos and against external aggressions which the hair may undergo such as blow-drying and perspiration.

[0010] For the purposes of the present invention, the term "pigment coating" refers to the presence of at least one alkoxysilane of formula (I), (I') or (II) as described below, forming a coating on the surface of the pigment.

[0011] By “residual shampoo colour”, in the context of the present invention, the colour obtained persists after shampooing.

[0012] The expression "at least one" means one or more.

[0013] Unless otherwise indicated, the bounds of a range of values ​​are included in that range, in particular in the expressions "between" and "ranging from ... to ...".

[0014] By "keratin fibers", we mean particularly human keratin fibers such as hair, eyelashes, eyebrows, and body hair, preferably hair, eyebrows and eyelashes, even more preferably hair.

[0015] For the purposes of the present invention, "hair" means the hair on the head. This term does not include body hair, eyebrows, or eyelashes.

[0016] For the purposes of this invention, "silicone" means any organosilicon polymer or oligomer with a linear or cyclic, branched or cross-linked structure, of variable molecular weight, obtained by polymerization and / or polycondensation of suitably functionalized silanes, and consisting essentially of a repetition of principal motifs in which silicon atoms are linked together by oxygen atoms (siloxane bond -Si-O-Si-), with optionally substituted hydrocarbon radicals being directly linked via a carbon atom to said silicon atoms.

[0017] For the purposes of the present invention and unless otherwise indicated, - an "alkyl" radical refers to a linear or branched, saturated radical, containing for example from 1 to 30 carbon atoms; - an "aminoalkyl" radical refers to an alkyl radical as defined above, said alkyl radical comprising an NH2 group; - a "hydroxyalkyl" radical refers to an alkyl radical as defined above, said alkyl radical comprising an OH group; - an "alkylene" radical refers to a divalent saturated hydrocarbon group in Ci-Cio, linear or branched, such as methylene, ethylene, or propylene; - A "cycloalkyl" or "alicycloalkyl" radical refers to a hydrocarbon group saturated cyclic mono- or polycyclic, preferably monocyclic, comprising from 1 to 3 rings, preferably 2 rings, and comprising from 3 to 40 carbon atoms, in particular comprising from 3 to 24 carbon atoms, more particularly from 3 to 20 carbon atoms, even more particularly from 3 to 12 carbon atoms, preferably between 5 and 10 carbon atoms, such as cyclopropyl, cyclopentyl, cyclohexyl, cycloheptyl, norbornyl, or isobotyl, in particular cyclopropyl, cyclopentyl, or a cyclohexyl. It being understood that the cycloalkyl radical may be substituted by one or more (Ci-C4)alkyl groups such as methyl, preferably the cycloalkyl radical is then an isobotyl group. - an "aryl" radical is an unsaturated aromatic hydrocarbon cyclic radical, comprising from 6 to 30 carbon atoms, preferably between 6 and 14 carbon atoms, more preferably between 6 and 12 carbon atoms, mono / bi / or tri / cyclic, fused or not, 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 by one or more (CrC4)alkyl groups such as methyl, preferably tolyl, xylyl, or methylnaphthyl, preferably the aryl group represents a phenyl; - an "aryloxy" radical refers to an aryl-oxy radical with "aryl" as defined previously; - an "alkoxy" radical refers to an alkyl-oxy radical with "alkyl", as defined previously.

[0018] Unless otherwise indicated, when compounds are mentioned in this application, this also includes their optical isomers, their geometric isomers, their tautomers, their salts, alone or in mixtures.

[0019] The invention is not limited to the illustrated examples. The features of the different examples can, in particular, be combined within non-illustrated variants. Detailed description of the invention Method according to the invention Composition A Alkoxysilane of formula (I) or of formula (!'):

[0020] Composition A according to the invention comprises at least one alkoxysilane selected from the following compounds of formula (I) or formula (!'), their oligomers and / or mixtures thereof:

[0021] (D ---- ,,J â I ° —— R? x-- j O------------X

[0022] in which: - Ra represents an alkyl group having from 1 to 20 carbon atoms, preferably from 1 to 10 carbon atoms, more preferably from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as a methyl, said alkyl group possibly being substituted by an aryl group; an alkoxy group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as an ethoxy; or an aryl group having from 6 to 12 carbon atoms; Rb and Rc; identical or different represent a hydrogen atom; an alkyl group having from 1 to 20 carbon atoms, preferably from 1 to 6 carbon atoms and in particular from 1 to 4 carbon atoms, in particular an ethyl group, it being understood that if Ra does not represent an alkoxy group, then Rb and Rc cannot simultaneously represent a hydrogen atom; Rd and Re, identical or different, represent a hydrogen atom; an alkyl group having from 1 to 20 carbon atoms, preferably from 1 to 6 carbon atoms and especially from 1 to 4 carbon atoms; a cycloalkyl group having from 3 to 20 carbon atoms; an aryl group having from 6 to 12 carbon atoms; an aminoalkyl group having from 1 to 20 carbon atoms; - A independently represents an alkylene group having from 1 to 10 linear or branched carbon atoms, which may be interrupted by at least one heteroatom chosen from O, S, NH or a carbonyl group (CO), preferably NH - Q represents a carbonyl group (CO); - r denotes an integer ranging from 0 to 1. Among the alkoxysilanes of formula (I), their oligomers and / or mixtures, we can notably mention 3-aminopropyltriethoxysilane (APTES), 3-aminopropylmethyldiethoxysilane (APMDES), 3-ureidopropyltrimethoxysilane and N-cyclohexylaminomethyltriethoxysilane.

[0023] APTES can for example be purchased from DOW CORNING under the name XIAMETER OFS-6011 SILANE or from MOMENTIVE PERFORMANCE MATERIALS under the name SILSOFT A-1100 or from SHIN ETSU under the name KBE-903.

[0024] The compounds of formula (I) may also refer to DYNASYLAN SIVO 210 or DYNASYLAN 1505 sold by the company EVONIK.

[0025] 3-ureidopropyltrimethoxysilane can for example be purchased from the company Gelest under the name SIU9058.0.

[0026] N-cyclohexylaminomethyl triethoxysilane can for example be purchased from the company WACKER under the name GENIOSIL XL 926.

[0027] Among the alkoxysilanes of formula (I'), their oligomers and / or mixtures, we may mention in particular N,N-Bis[3-(trimethoxysilyl)propyl]ethylenediamine (CAS RN: 74956-86-8), Nl,Nl-Bis[3-(triethoxysilyl)propyl]-l,2-ethanediamine (CAS RN: 457065-96-2), 1,2-ethanediamine, Nl-[3-(triethoxysilyl)propyl]-Nl-[3-(trimethoxysilyl)propyl]- (CAS RN: 1638528-78-5), and their mixtures.

[0028] Preferably, the alkoxysilane(s), their oligomers and / or mixtures thereof are chosen from the compounds of the following formula (I): in which: - Ra represents an alkyl group having from 1 to 10 carbon atoms, in particular from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms, preferably a methyl, or an alkoxy group having from 1 to 4 carbon atoms, preferably from 1 to 2 carbon atoms, preferably an ethoxy; - Rb and Rc, identical or different, represent an alkyl group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms like an ethyl; - Rd and Re, identical, represent a hydrogen atom or Rd designates a hydrogen atom and Re designates a C5-C6 cycloalkyl radical such as cyclohexyl; - A independently represents an alkylene group having from 1 to 10 linear or branched carbon atoms, which can be interrupted by at least one heteroatom chosen from O, S, NH or a carbonyl group (CO), preferably NH; - r denotes an integer equal to 0.

[0029] Preferably, the alkoxysilane(s), their oligomers and / or mixtures thereof are chosen from compounds of formula (I) in which Ra represents an ethoxy group, Rb and Rc are identical and represent an ethyl, Rd and Re represent a hydrogen atom, A represents a propylene and r denotes an integer equal to 0.

[0030] According to a preferred embodiment, alkoxysilane of formula (I), its oligomers and / or mixtures thereof, is 3-aminopropyltriethoxysilane (APTES).

[0031] The alkoxysilane(s) of formula (I) or of formula (I'), their oligomers and / or mixtures thereof may be present in a total quantity of 0.1 to 40% by weight, preferably 0.5 to 30% by weight, preferably 0.75 to 25% by weight, better 1 to 20% by weight, even better 1.5 to 15% by weight relative to the total weight of composition A.

[0032] These contents are distinct from the content of alkoxysilane of formula (I) or (!') used for coating the pigment.

[0033] According to a preferred embodiment, the alkoxysilane(s) of formula (I), their oligomers and / or mixtures thereof is (are) present in a total quantity ranging from 0.1 to 40% by weight, preferably from 0.5 to 30% by weight, preferably from 0.75 to 25% by weight, better from 1 to 20% by weight, even better from 1.5 to 15% by weight relative to the total weight of composition A. Alkoxysilane of formula (II):

[0034] Composition A according to the invention comprises at least one alkoxysilane of the following formula (II), its oligomers and / or mixtures thereof: in which: - Ra represents an alkyl group having from 1 to 20 carbon atoms, preferably from 1 to 10 carbon atoms, more preferably from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as a methyl, said alkyl group possibly being substituted by an aryl group; an alkoxy group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as an ethoxy; or an aryl group having from 6 to 12 carbon atoms; - Rb represents a hydrogen atom or an alkyl group having from 1 to 20 carbon atoms, preferably from 1 to 6 carbon atoms and in particular from 1 to 4 carbon atoms, in particular an ethyl group; - Rc represents an alkyl group having from 1 to 20 carbon atoms, preferably from 1 to 10 carbon atoms, more preferably from 1 to 4 carbon atoms and in particular a particular group of 1 to 2 carbon atoms such as a methyl group, said alkyl group possibly being substituted by an aryl group; an alkoxy group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as an ethoxy group; or an aryl group having from 6 to 12 carbon atoms; it being understood that if Ra and Rc do not represent an alkoxy group, then Rb cannot represent a hydrogen atom; - k denotes an integer ranging from 0 to 5, preferably ranging from 0 to 3; - Rf represents a hydrogen atom; an alkyl group having from 1 to 10 carbon atoms and in particular from 1 to 4 carbon atoms; or a group with the following formula (lia): (Ha) in which Rn represents a hydroxyl group (OH); an alkyl group having from 1 to 10 carbon atoms, preferably a methyl.

[0035] Among the alkoxysilanes of formula (II), their oligomers and / or mixtures thereof, we may in particular mention tetraethoxysilane (TEOS), methyltrimethoxysilane (MTMS), methyltriethoxysilane (MTES), dimethyltriethoxysilane (DMDES), diethyltriethoxysilane, dipropyltriethoxysilane, propyltriethoxysilane, risobutyltriethoxysilane, phenyltriethoxysilane, phenylmethyltriethoxysilane, diphenyltriethoxysilane, benzyltriethoxysilane, benzylmethyltriethoxysilane, di-benzyltriethoxysilane, acetoxymethyltriethoxysilane and mixtures thereof.

[0036] TEOS can for example be purchased from the company EVONIK under the name Dynasylan® A or Dynasylan® A SQ.

[0037] MTES can for example be purchased from the company EVONIK under the name Dynasylan® MTES.

[0038] The DMDES can for example be purchased from the company GELEST under the reference SID3404.0.

[0039] Preferably, the alkoxysilane(s) of formula (II), their oligomers and / or mixtures thereof are such that: - Ra represents an alkoxy group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as a methoxy or an ethoxy; or an alkyl group having from 1 to 10 carbon atoms possibly substituted by an aryl group, preferably 1 to 2 carbon atoms possibly substituted by an aryl group; - Rb represents an alkyl group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms, in particular from 1 to 2 carbon atoms such as a methyl or an ethyl; - Rc represents an alkoxy group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as a methoxy or an ethoxy - k denotes an integer from 0 to 3, preferably equal to 0; - Rf represents a hydrogen atom or an alkyl group having from 1 to 10 carbon atoms and in particular from 1 to 4 carbon atoms such as a methyl or an ethyl.

[0040] More preferably, the alkoxysilane(s) of formula (II), their oligomers and / or mixtures thereof are such that: - Ra represents an alkyl group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms, in particular from 1 to 2 carbon atoms such as a methyl or an ethyl; - Rb represents an alkyl group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms, in particular from 1 to 2 carbon atoms such as a methyl or an ethyl; - Rc represents an alkoxy group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as a methoxy or an ethoxy - k denotes an integer equal to 0; - Rf represents an alkyl group having from 1 to 10 carbon atoms and in particular from 1 to 4 carbon atoms such as a methyl or an ethyl.

[0041] According to a preferred embodiment, alkoxysilane of formula (II), its oligomers and / or mixtures thereof, is methyltrimethoxysilane (MTMS) or methyltriethoxysilane (MTES).

[0042] The alkoxysilane(s) of formula (II), its oligomers and / or mixtures thereof may be present in a total quantity of 0.5 to 90% by weight, preferably 1 to 75%, preferably 3 to 45% by weight, better 5 to 40% by weight, relative to the total weight of composition A.

[0043] These contents are distinct from the content of alkoxysilane of formula (Ilb) used for coating the pigment. Organic solvents:

[0044] Composition A according to the invention may comprise one or more organic solvents.

[0045] Examples of organic solvents include lower CrC4 alkanols such as ethanol and isopropanol; polyols and polyol ethers such as glycerol, 2-butoxyethanol, propylene glycol, propylene glycol monomethyl ether, diethylene glycol monoethyl ether and monomethyl ether, as well as aromatic alcohols such as benzyl alcohol or phenoxyethanol, and mixtures thereof. Preferably, composition A according to the invention comprises ethanol.

[0046] The organic solvent(s) may be present in a total quantity from 1 to 70% by weight, preferably from 5 to 55% by weight, more preferably from 10 to 50% by weight relative to the total weight of composition A according to the invention. Composition B: Film-forming polymer:

[0047] Composition B according to the invention comprises at least one film-forming polymer.

[0048] Preferably, the film-forming polymer(s) are chosen from among the polymers hydrophilic film-forming polymers, hydrophobic film-forming polymers, and their mixtures. For the purposes of this invention, "polymer" means a compound consisting of the repetition of one or more motifs (these motifs being derived from compounds called monomers). This motif or these motifs are repeated at least twice and preferably at least three times. By "hydrophobic polymer" we mean a polymer having a solubility in water at 25°C of less than 1% by weight. By "hydrophilic polymer" we mean a polymer having a solubility in water at 25°C greater than or equal to 1% by weight. A "film-forming" polymer is defined as a polymer capable of forming, alone or in the presence of an auxiliary film-forming agent, a macroscopically continuous film on a substrate, particularly on keratinous materials, and preferably a cohesive film.

[0049] According to a preferred embodiment, the film-forming polymer(s) are selected from hydrophobic film-forming polymers. In a particularly preferred embodiment, the hydrophobic film-forming polymer is a polymer selected from the group comprising: - film-forming polymers soluble in an organic solvent medium, in particular liposoluble polymers; this means that the polymer is soluble or miscible in the organic medium and will form a single homogeneous phase when incorporated into the medium. - Film-forming polymers dispersible in an organic solvent medium; this means that the polymer forms an insoluble phase in the organic medium, the polymer remaining stable and / or compatible once incorporated into this medium. In particular, such polymers can be in the form of non-aqueous dispersions of polymer particles, preferably dispersions in silicone or hydrocarbon oils; in one embodiment, the non-aqueous polymer dispersions comprise polymer particles stabilized on their surface by at least one stabilizing agent; these non-aqueous dispersions are often called "NADs (non-aqueous dispersions)". - Film-forming polymers in the form of aqueous dispersions of polymer particles mean that the polymer forms a water-insoluble phase. The polymer remains stable and / or compatible once incorporated into water, and the polymer particles can be stabilized on their surface by at least one stabilizing agent. These polymer particles are often called "latex"; in this case, the composition must include an aqueous phase.

[0050] Among the hydrophobic film-forming polymers that can be used in the composition of the present invention, we can mention synthetic polymers, of radical type or of polycondensate type, polymers of natural origin and their mixtures. Examples of hydrophobic film-forming polymers include acrylic polymers, polyurethanes, polyesters, polyamides, polyureas, cellulosic polymers such as nitrocellulose, silicone polymers, acrylamide-type polymers, and polyisoprenes. Non-ionic, amphoteric, anionic or cationic hydrophobic film-forming polymers can be used.

[0051] Preferably, the hydrophobic film-forming polymer(s) according to the invention are chosen from acrylic acid copolymers, methacrylic acid copolymers, acrylic acid ester homopolymers or copolymers, methacrylic acid ester homopolymers or copolymers, acrylic acid amide homopolymers or copolymers, methacrylic acid amide homopolymers or copolymers, vinylpyrrolidone copolymers, vinyl alcohol copolymers, vinyl acetate copolymers, ethylene homopolymers or copolymers, propylene homopolymers or copolymers, styrene homopolymers or copolymers, polyurethanes, polyesters and / or polyamides.

[0052] The hydrophobic film-forming polymer can be selected from homopolymers and copolymers of olefins such as cycloolefins; butadiene; isoprene; styrene; vinyl ethers, esters or amides; (meth)acrylic acid esters or amides containing a linear, branched or cyclic Ci-C20 alkyl group, a C6-Ci0 aryl group or a C2-C6 hydroxyalkyl group.

[0053] The hydrophobic film-forming polymer can in particular be chosen from homopolymers and copolymers can be obtained from monomers chosen from the group consisting of isooctyl (meth)acrylate, isononyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, lauryl (meth)acrylate, isopentyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, ethyl (meth)acrylate, methyl (meth)acrylate, tert-butyl (meth)acrylate, tridecyl (meth)acrylate, stearyl (meth)acrylate, hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, benzyl or phenyl acrylate, or mixtures thereof.

[0054] One can cite for example the ethylene / sodium acrylate copolymer marketed under the trade name ECOSMOOTH SATIN® by the company Dow. The hydrophobic film-forming polymer can be chosen in particular from among the homo-polymers and copolymers that can be obtained from amides of acid monomers, we can mention (meth)acrylamides, and in particular N-alkyl (meth)acrylamides, especially of C2-Ci2 alkyl such as N-ethyl acrylamide, Nt-butyl acrylamide, N-octyl acrylamide; N-dialkyl (C1-C4) (meth)acrylamides, perfluoroalkyl (meth)acrylates. We can also mention copolymers whose CTFA designation (4th Ed., 1991) is Octylacrylamide / acrylates / butylaminoethyl-methacrylate copolymer, such as the products sold under the name AMPHOMER® or LOVOCRYL® 47 by the company NATIONAL STARCH, as well as copolymers whose CTFA designation is Acrylates / octylacrylamide copolymer, such as the products sold under the name DERMACRYL® LT or DERMACRYL® 79 by the company NATIONAL STARCH.

[0055] According to a preferred embodiment, the hydrophobic film-forming polymer(s) according to the invention are chosen from anionic copolymers. Preferably, the anionic copolymers according to the invention are copolymers of acrylic acid, methacrylic acid or (meth)acrylic acid esters containing a linear, branched or cyclic Ci-C6 alkyl group, as described under the INCI name Acrylates. Such copolymers are marketed by DOW CHEMICAL under the name Aculyn®33. Copolymers of unsaturated ethylenic acid esters and alkoxylated fatty alcohols can also be used according to the invention. Such unsaturated ethylenic acid esters are in particular acrylic acid, methacrylic acid, and itaconic acid, and such alkoxylated fatty alcohols are in particular steareth-20 and ceteth-20. Examples include Aculyn®22 (Acrylates / Steareth-20 Methacrylate Copolymer), Aculyn®28 (Acrylates / Beheneth-25 Methacrylate Copolymer), Structure 2001® (Acrylates / Steareth-20 Itaconate Copolymer), Structure 3001® (Acrylates / Ceteth-20 Itaconate Copolymer), Structure Plus® (Acrylates / C10-30 Alkyl PEG-20 Itaconate Amino-acrylate Copolymer), Carbopol® 1342, 1382, Ultrez 20, Ultrez 21 (Acrylates / C10-30 Alkyl Acrylate Crosspolymer), Synthalen W2000® (Acrylates / Palmeth-25 Acrylate Copolymer), and SOLTEX OPT (copolymer). acrylates / Ci2-22 alkyl methacrylate) marketed by DOW CHEMICAL.

[0056] The hydrophobic film-forming polymer can also be chosen from among the homo- Polymers and copolymers obtained from vinyl monomers. Examples include homopolymers or copolymers of N-vinylpyrrolidone, vinylcaprolactam, vinyl N-alkyl(Cl-C6)pyrroles, vinyl-oxazoles, vinyl-thiazoles, vinylpyrimidine or vinylimidazole. Examples of vinylpyrrolidone copolymers that can be used in the invention include VP / vinyl laurate copolymer, VP / vinyl stearate copolymer, butylated polyvinylpyrrolidone (PVP), VP / hexadecene marketed by ISP under the name Ganex V216, VP / eicosene marketed by ISP under the name Ganex V220, VP / triacontene or VP / acrylic acid / lauryl methacrylate.

[0057] The hydrophobic film-forming polymer can also be chosen from homopolymers and copolymers that can be obtained from olefins such as ethylene, propylene, butenes, isoprene, butadienes.

[0058] In one embodiment, the hydrophobic film-forming polymer according to the invention is a block copolymer comprising at least one block made of styrene or styrene derivative units (for example, methylstyrene, chlorostyrene, or chloromethylstyrene). The copolymer comprising at least one styrene block may be a diblock or triblock copolymer, or even a multiblock, star, or radial copolymer. The copolymer comprising at least one styrene block may further comprise, for example, an alkylstyrene block (AS), an ethylene / butylene block (EB), an ethylene / propylene block (EP), a butadiene block (B), an isoprene block (I), an acrylate block (A), a methacrylate block (MA), or a combination of these blocks.The copolymer comprising at least one block made up of styrene motifs or styrene derivatives may be a diblock or triblock copolymer, and in particular of the polystyrene / polyisoprene or polystyrene / polybutadiene type, such as those marketed or manufactured under the name "Luvitol HSB" by BASF SE.

[0059] Preferably, the hydrophobic film-forming polymer(s) according to the invention are chosen from vinylpyrrolidone (co)polymers, vinylalcohol (co)polymers, vinylacetate (co)polymers, carboxyvinyl (co)polymers, acrylic acid (co)polymers, methacrylic acid (co)polymers, acrylic acid ester (co)polymers, ethylene (co)polymers, acrylamide (co)polymers and mixtures thereof. Preferably, the hydrophobic film-forming polymer(s) are chosen from polyvinylpyrrolidone copolymers, acrylamide copolymers, acrylic acid ester homopolymers or copolymers, ethylene homopolymers or copolymers and mixtures thereof.

[0060] According to another preferred embodiment, the film-forming polymer(s) are chosen from among hydrophilic film-forming polymers. Non-ionic, anionic, or cationic hydrophilic film-forming polymers can be used. The hydrophilic film-forming polymer can be selected from vinyl-pyrrolidone (co)polymers, vinyl alcohol (co)polymers, vinyl acetate polymers, carboxyvinyl (co)polymers, acrylic acid (co)polymers, methacrylic acid (co)polymers, natural gums, polysaccharides and / or acrylamide (co)polymers. Preferably, the hydrophilic film-forming polymer is chosen from vinylpyrrolidone (PVP) homopolymers and / or vinylpyrrolidone copolymers, more preferably vinylpyrrolidone (PVP) homopolymers. Examples include vinylpyrrolidone (PVP) homopolymers marketed under the name Luviskol® K by BASF SE, in particular Luviskol® K 90 or Luviskol® K 85 by BASF SE. The PVP K30 polymer, marketed by Ashland Inc. (ISP, POI Chemical), can also be used. PVP K30 is a cold-water soluble polyvinylpyrrolidone polymer with CAS number 9003-39-8 and a molecular weight of 40.000 g / mol. Other vinylpyrrolidone homopolymers suitable for the invention are marketed under the trade names LUVITEC K 17, LUVITEC K 30, LUVITEC K 60, LUVITEC K 60, LUVITEC K 80, LUVITEC K 85, LUVITEC K 90 and LUVITEC K 115 by BASF SE. We can also mention the vinylpyrrolidone / vinyl ester copolymers marketed under the name Luviskol® by BASF SE, in particular the non-ionic polymers Luviskol® VA64 and Luviskol® VA73 (vinylpyrrolidone / vinyl acetate copolymers). We can also mention styrene / vinylpyrrolidone copolymers, vinylpyrrolidone / vinyl acetate copolymers, vinylpyrrolidone / DMAPA acrylates copolymers, vinylpyrrolidone / vinyl caprolactam / DMAPA acrylates copolymers. The vinylpyrrolidone / vinyl caprolactam / DMAPA acrylates copolymers may be marketed by Ashland Inc. under the trade name Aquaflex® SF-40. Vinylpyrrolidone / DMAPA acrylates copolymers may be marketed by Ashland Inc. under the trade name Styleze CC-10. As examples of vinylpyrrolidone copolymers, we can mention the copolymers obtained by reaction of N-vinylpyrrolidone with at least one monomer chosen from N-vinylformamide, vinyl acetate, ethylene, propylene, acrylamide or vinylca-prolactam.

[0061] According to a preferred embodiment, the hydrophilic film-forming polymer(s) are selected from vinylpyrrolidone (PVP) homopolymers, vinylpyrrolidone / vinyl acetate copolymers, vinylpyrrolidone / styrene copolymers, vinylpyrrolidone / ethylene copolymers, vinylpyrrolidone / propylene copolymers, vinylpyrrolidone / vinyl caprolactam copolymers, vinylpyrrolidone / vinylformamide copolymers, vinylpyrrolidone / vinyl alcohol copolymers, and mixtures thereof.

[0062] Preferably, the film-forming polymer(s) are chosen from vinylpyrrolidone (PVP) homopolymers, vinylpyrrolidone / vinyl acetate copolymers, vinylpyrrolidone / styrene copolymers, vinylpyrrolidone / ethylene copolymers, vinylpyrrolidone / propylene copolymers, vinylpyrrolidone / vinyl caprolactam copolymers, vinylpyrrolidone / vinylformamide copolymers, vinylpyrrolidone / vinylalcohol copolymers, acrylamide copolymers, acrylic acid ester homopolymers or copolymers, ethylene homopolymers or copolymers and mixtures thereof. Preferably, the film-forming polymer(s) are chosen from vinylpyrrolidone (PVP) homopolymers, acrylamide copolymers, acrylic acid ester homopolymers or copolymers, ethylene homopolymers or copolymers and mixtures thereof.

[0063] The film-forming polymer(s) may be present in a total quantity ranging from 0.1 to 30% by weight, preferably from 0.5 to 25% by weight, even better from 1 to 20% by weight, relative to the total weight of composition B. Composition A and / or B Non-ionic, non-associative cellulose polymer

[0064] Composition A and / or composition B according to the invention may (can) comprise at least one non-ionic cellulosic polymer, preferably non-associative. Non-ionic non-associative cellulosic polymer differs from the film-forming polymers mentioned previously. According to the invention, "cellulosic polymer" means any polysaccharide polymer having in its structure chains of glucose residues joined by beta-1,4 bonds. According to the invention, "non-associative cellulosic polymer" means that cellulosic polymers do not have a C8-C30 fatty chain.

[0065] Non-associative, non-ionic cellulosic polymers can be selected from alkyl(Ci-C4)celluloses, such as methylcelluloses and ethylcelluloses (e.g., Dow Chemical's Ethocel Standard 100 Premium); hydroxyalkyl(Ci-C4)celluloses, such as hydroxymethylcelluloses, hydroxyethylcelluloses, and hydroxypropylcelluloses; mixed celluloses hydroxyalkyl(Ci-C4)-alkyl(Ci-C4)celluloses, such as hydroxypropyl-methylcelluloses (e.g., Methocel E4M from DOW CHEMICAL), hydroxyethyl-methylcelluloses, hydroxyethyl-ethyl-celluloses (e.g., Bermocoll E 481 FQ from AKZO NOBEL), and hydroxybutyl-methylcelluloses, and mixtures thereof.

[0066] Preferably, the non-ionic non-associative cellulosic polymer(s) are chosen from among the hydroxyalkyl(Ci-C4)celluloses. Preferably, the non-ionic non-associative cellulosic polymer(s) are hydroxyethylcellulose and / or hydroxypropylcellulose. More preferably, composition A and / or composition B comprises(s) hydroxyethylcellulose and / or hydroxypropylcellulose.

[0067] In particular, hydroxyethylcellulose sold by Ashland Inc. under the trade name NATROSOL 250 HHR PC and hydroxypropylcellulose sold by Ashland Inc. under the trade name KLUCEL MF PHARM HY-DROXYPROPYLCELLULOSE may be cited.

[0068] The non-ionic cellulosic polymer(s) may be present in a total quantity preferably ranging from 0.01 to 10% by weight, preferably from 0.05 to 5% by weight, better from 0.1 to 3% by weight relative to the total weight of composition A and / or composition B

[0069] The non-associative non-ionic cellulosic polymer(s) may be present in a total quantity preferably from 0.01 to 10% by weight, preferably from 0.05% to 5% by weight, better from 0.1 to 3% by weight relative to the total weight of composition A and / or composition B. Pigment:

[0070] Composition A and / or composition B according to the invention comprises(s) at least one pigment. In the context of the present invention, the pigment(s) are coated with at least one alkoxysilane of formula (I), (I') or (II) as described above.

[0071] Preferably, composition A according to the invention comprises at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (F) or (II) as described above.

[0072] By “pigment”, we mean all pigments that impart color to materials that- ratiniques. Their solubility in water at 25 °C and atmospheric pressure (760 mmHg) is less than 0.05% by weight, and preferably less than 0.01% by weight. The pigments that can be used are chosen in particular from among the organic and / or mineral pigments known to the technique, in particular those described in Kirk-Othmer's Encyclopedia of Chemical Technology and in Ullmann's Encyclopedia of Industrial Chemistry. Pigments can be natural, of natural origin, or not. These pigments can be in powder or paste form. For example, pigments can be chosen from mineral pigments, organic pigments, lacquers, special effect pigments such as pearlescent or glitter pigments, and mixtures thereof.

[0073] The pigment may be a mineral pigment. By mineral pigment, we mean any pigment that meets the definition in the Ullmann Encyclopedia in the chapter on inorganic pigments. Examples of mineral pigments useful in the present invention include metal oxides and hydrates of metal oxides, such as aluminum oxides, boron oxides, germanium oxides, manganese oxides, in particular manganese violet, magnesium oxides, iron oxides, cobalt oxides, chromium oxides, titanium oxides, in particular titanium oxide, vanadium oxides, zirconium oxides, tin oxides, zinc oxides, silicon oxides, aluminum hydrates, silicon hydrates, chromium hydrate, ultramarine blue, ferric blue, and mixtures thereof.

[0074] These mineral pigments can be selected according to their refractive index. Mineral pigments with a low refractive index have a refractive index of less than 1.8, more preferably less than 1.6. Mineral pigments with a low refractive index include, among others, aluminum oxides, aluminum hydrates, boron oxides, germanium oxides, manganese oxides, magnesium oxides, silicon oxides, silicon hydrates, and mixtures thereof. High-refractive-index mineral pigments have a refractive index greater than 1.9, preferably greater than 2.0, and ideally greater than 2.4. High-refractive-index mineral pigments include, in particular, metal oxides that selectively absorb light, i.e., colored metal oxides, such as red iron(III) oxides, notably hematite (α-Fe₂O₃) and maghemite (γ-Fe₂O₃), blue cobalt(II) oxides, green chromium(III) oxides, blue titanium(III) oxides, particularly in mixtures with titanium nitrides and oxynitrides, orange vanadium(V) oxides, and mixtures thereof. High-refractive-index mineral pigments also include colorless metal oxides, such as titanium dioxide and / or zirconium oxide.

[0075] The pigment may be an organic pigment. By "organic pigment" is meant any pigment that meets the definition in the Ullmann encyclopedia in the chapter on organic pigment. The organic pigment can be chosen from compounds including nitroso, nitro, azo, xanthene, pyrene, quinoline, quinoline, anthraquinone, triphenylmethane, fluorane, phthalocyanine, metal complex type, isoindolinone, isoindoline, qui-nacridone, perinone, perylene, diketopyrrolopyrrole, indigo, thioindigo, dioxazine, triphenylmethane, quinophthalone. In particular, white or colored organic pigments may be chosen from carmine, carbon black, aniline black, azo yellow, quinacridone, phthalocyanine blue, the blue pigments coded in the Color Index under references Cl 42090, 69800, 69825, 74100, 74160, the yellow pigments coded in the Color Index under references Cl 11680, 11710, 19140, 20040, 21100, 21108, 47000, 47005, the green pigments coded in the Color Index under references Cl 61565, 61570, 74260, the orange pigments coded in the Color Index under reference CI 11725, 45370, 71105, the red pigments coded in the Color Index under the references CI 12085, 12120, 12370, 12420, 12490, 14700, 15525, 15580, 15620, 15630, 15800, 15850, 15865, 15880, 26100, 45380, 45410, 58000, 73360, 73915, 75470, the pigments obtained by oxidative polymerization of indole, phenolic derivatives as described in patent FR 2 679 771. As an example, we can also mention organic pigment pastes such as the products sold by the company HOECHST under the name: - COSMENYL YELLOW IOG: Pigment YELLOW 3 (Cl 11710); - COSMENYL YELLOW G: Pigment YELLOW 1 (Cl 11680); - ORANGE COSMENYL GR: Pigment ORANGE 43 (Cl 71105); - COSMENYL RED R: Pigment RED 4 (Cl 12085); - CARMIN COSMENYL FB: Pigment RED 5 (Cl 12490); - VIOLET COSMENYL RL: Pigment VIOLET 23 (Cl 51319); - COSMENYL BLUE A2R: Pigment BLUE 15.1 (Cl 74160); - VERT COSMENYL GG: Pigment GREEN 7 (Cl 74260); - COSMENYL BLACK R: Pigment BLACK 7 (Cl 77266).

[0076] The pigments according to the invention can also be in the form of composite pigments as described in patent EP 1 184 426. These composite pigments can be composed in particular of particles comprising an inorganic core, at least one binder ensuring the fixation of organic pigments on the core, and at least one organic pigment covering at least partially the core.

[0077] The organic pigment can also be a lacquer. By lacquer, we mean colorants adsorbed onto insoluble particles, the whole thus obtained remaining insoluble during use.

[0078] The inorganic substrates on which the dyes are adsorbed are, for example, alumina, silica, calcium sodium borosilicate or calcium aluminium borosilicate, and aluminium.

[0079] Among the colorants, we can mention carminic acid. We can also mention the colorants known under the following names: D & C Red 21 (CI 45 380), D & C Orange 5 (CI 45 370), D & C Red 27 (CI 45 410), D & C Orange 10 (CI 45 425), D & C Red 3 (CI 45 430), D & C Red 4 (CI 15 510), D & C Red 33 (CI 17 200), D & C Yellow 5 (CI 19 140), D & C Yellow 6 (CI 15 985), D & C Green (CI 61 570), D & C Yellow 1 O (CI 77 002), D & C Green 3 (CI 42 053), D & C Blue 1 (CI 42 090).

[0080] As examples of lacquers, we can cite the product known under the following name: D & C Red 7 (CI 15 850 :1).

[0081] The pigment can also be a special effects pigment. Special effects pigments are defined as pigments that generally create a non-uniform and changing colored appearance (characterized by a certain shade, vibrancy, and clarity) depending on the viewing conditions (light, temperature, viewing angles, etc.). They are thus distinct from colored pigments that provide a uniform opaque, semi-transparent, or conventionally transparent tint.

[0082] There are several types of special effect pigments, those with a low refractive index such as fluorescent or photochromic pigments, and those with a higher refractive index such as mother-of-pearl, interference pigments or glitter.

[0083] Examples of special effect pigments include pearlescent pigments such as titanium-coated mica or bismuth oxychloride, colored pearlescent pigments such as titanium-coated mica with iron oxides, iron oxide-coated mica, titanium-coated mica, particularly with ferric blue or chromium oxide, titanium-coated mica with an organic pigment as defined above, and bismuth oxychloride-based pearlescent pigments. Examples of pearlescent pigments include Cellini pearlescent pigments marketed by BASF (Mica-TiO2-lacquer), Prestige pearlescent pigments marketed by Eckart (Mica-TiO2), Prestige Bronze pearlescent pigments marketed by Eckart (Mica-Fe2O3), and Colorona pearlescent pigments marketed by Merck (Mica-TiO2-Fe2O3).

[0084] We can also mention gold-colored mother-of-pearl, notably marketed by BASF under the names Brilliant Gold 212G (Timica), Gold 222C (Cloisonne), Sparkle Gold (Timica), Gold 4504 (Chromalite), and Monarch Gold 233X (Cloisonne); bronze mother-of-pearl, notably marketed by Merck under the names Bronze Fine (17384) (Colorona) and Bronze (17353) (Colorona), and by BASF under the name Super Bronze (Cloisonne); orange mother-of-pearl, notably marketed by BASF under the names Orange 363C (Cloisonne) and Orange MCR 101 (Cosmica), and by Merck under the names Passion Orange (Colorona) and Matte Orange (17449) (Microna); and brown mother-of-pearl, notably marketed by BASF under the name Nu-antique copper 340XB (Cloisonne) and Brown CL4509 (Chromalite); mother-of-pearl with a copper sheen, notably marketed by BASF under the name Copper 340A (Timica); mother-of-pearl with a red sheen, notably marketed by MERCK under the name Sienna fine (17386) (Colorona); mother-of-pearl with a yellow sheen, notably marketed by BASF under the name Yellow (4502) (Chromalite); mother-of-pearl with a red sheen and gold sheen, notably marketed by BASF under the name Sunstone G012 (Gemtone); mother-of-pearl with a pink sheen, notably marketed by BASF under the name Tan opale G005 (Gemtone);black mother-of-pearl with a gold sheen, notably marketed by BASF under the name Nu antique bronze 240 AB (Timica); blue mother-of-pearl, notably marketed by MERCK under the name Matte blue (17433) (Microna); white mother-of-pearl with a silver sheen, notably marketed by MERCK under the name Xirona Silver; and orange-pink-green-gold mother-of-pearl, notably marketed by MERCK under the name Indian summer (Xirona), and their mixtures.

[0085] As further examples of nacres, we can also mention particles comprising a borosilicate substrate coated with titanium oxide.

[0086] Particles with a glass substrate coated with titanium oxide are notably sold under the name METASHINE MC1080RY by the company TOYAL.

[0087] We can also mention special effect pigments composed of Cu-Zn metal alloys sold under the name Rotoflex® by the company ECKART.

[0088] Finally, examples of mother-of-pearl include polyethylene terephthalate flakes, particularly those marketed by Meadowbrook Inventions under the name Silver IP 0.004X0.004 (silver flakes). Multilayer pigments based on synthetic substrates such as alumina, silica, calcium sodium borosilicate or calcium aluminum borosilicate, and aluminum can also be considered.

[0089] Special effect pigments can also be chosen from reflective particles, that is to say, particles whose size, structure, including the thickness of the layer(s) that constitute them and their physical and chemical nature, and surface condition, enable them to reflect incident light. This reflection may, where appropriate, have sufficient intensity to create, on the surface of the composition or mixture, when applied to the makeup support, highlights visible to the naked eye, that is to say, brighter points that contrast with their surroundings by appearing to shine.

[0090] Reflective particles can be selected so as not to significantly alter the coloring effect generated by the coloring agents associated with them, and more particularly so as to optimize this effect in terms of rendering of color. They may in particular have a yellow, pink, red, bronze, orange, brown, gold and / or copper color or reflection.

[0091] These particles can have various shapes, including being platelet-shaped or globular, particularly spherical.

[0092] Reflective particles, whatever their shape, may or may not have a multilayer structure and, in the case of a multilayer structure, for example at least one layer of uniform thickness, in particular of a reflective material.

[0093] When the reflective particles do not have a multilayer structure, they can be composed, for example, of metals such as copper, tin, zinc, and / or their alloys, or, for example, of metal oxides, preferably of oxides of magnesium, tin, zinc, cobalt, nickel, iron, zirconium, titanium and cerium, in particular titanium or iron oxides obtained by synthesis.

[0094] Reflective particles are described in particular in documents JP-A-09188830, JP-A-10158450, JP-A-10158541, JP-A-07258460 and JP-A-05017710.

[0095] The sizes of these reflective particles are preferably on average less than 50 nm, more preferably less than 30 nm, better less than 10 nm. The distance between the particles is preferably less than 10 nm.

[0096] Other examples include non-substrate interference pigments such as liquid crystals (Wacker's Helicones HC) and interference holographic glitter (Spectratek's Geometry Pigments or Spectra f / x). Special effect pigments also include fluorescent pigments, whether daylight fluorescent or ultraviolet fluorescent, phosphorescent pigments, photochromic pigments, thermochromic pigments, and quantum dots, marketed, for example, by Quantum Dots Corporation.

[0097] The variety of pigments that can be used in the present invention makes it possible to obtain a rich palette of colors, as well as particular optical effects such as metallic, interference effects.

[0098] The size of the pigment used in the composition according to the present invention is generally between 5 nm and 200 µm, preferably between 7 nm and 80 µm, and more preferably between 10 nm and 50 µm.

[0099] Preferably, the pigment(s) is / are chosen from mineral, mixed mineral-organic or organic pigments.

[0100] More preferably, the pigment(s) is / are chosen from among mineral pigments.

[0101] According to a preferred embodiment, the pigment(s) according to the invention is (are) chosen from mineral pigments, preferably iron oxides, in particular iron (III) oxides such as Fe2O3.

[0102] The pigment(s) as described above is / are coated with at least one alkoxysilane of formula (I), (!'), or (II) as described above, their oligomers and / or mixtures thereof.

[0103] Preferably, the pigment(s) according to the invention is (are) coated with at least one alkoxysilane of formula (I), or of formula (II) as described above, their oligomers and / or mixtures thereof.

[0104] Preferably, the pigment(s) according to the invention is (are) coated with at least one alkoxysilane of formula (II) as described above, their oligomers and / or mixtures thereof.

[0105] Among the alkoxysilanes of formula (II) suitable for coating the pigment, particular examples include tetramethoxysilane (TMOS), tetraethoxysilane (TEOS), tetraisopropoxysilane, methyltrimethoxysilane (MTMS), methyltriethoxysilane (MTES), rethyltrimethoxysilane, rethyltriethoxysilane, propyltrimethoxysilane, propyltriethoxysilane, isobutyltriethoxysilane, hexyltrimethoxysilane, hexyltriethoxysilane, octyltrimethoxysilane, octyltriethoxysilane (or triethoxycaprylylsilane), dodecyltrimethoxysilane, dodecyltriethoxysilane, octadecyltrimethoxysilane, octadecyltriethoxysilane, dimethyldiethoxysilane (DMDES), diethyldiethoxysilane, dipropyldiethoxysilane, phenyltriethoxysilane, phenylmethyldiethoxysilane, diphenyldiethoxysilane, benzyltriethoxysilane, benzylmethyldiethoxysilane, dibenzyldiethoxysilane, acetoxymethyltriethoxysilane and mixtures thereof.

[0106] The alkoxysilane(s) of formula (II) used for coating the pigment, their oligomers and / or mixtures may be identical or different from the alkoxysilane(s) of formula (II) present in composition A.

[0107] Preferably, the alkoxysilane(s) of formula (II) used for coating the pigment, their oligomers and / or mixtures thereof is (are) different from the alkoxysilane(s) of formula (II) present in composition A.

[0108] More preferably, the pigment(s) according to the invention is / are coated with at least one alkoxysilane of the following formula (Ilb), their oligomers and / or mixtures thereof:

[0109] R (Ilb) F O f s^°"” R b kc

[0110] in which:

[0111] - Ra represents an alkyl group having from 1 to 20 carbon atoms, preferably of 1 to 10 carbon atoms, more preferably 2 to 8 carbon atoms, said alkyl group possibly being substituted by an aryl group; an alkoxy group having 1 to 10 carbon atoms, preferably 1 to 4 carbon atoms and in particular 1 to 2 carbon atoms such as an ethoxy;

[0112] - Rb represents an alkyl group having from 1 to 20 carbon atoms, preferably of 1 to 6 carbon atoms and in particular 1 to 4 carbon atoms, in particular an ethyl;

[0113] - Rc represents an alkoxy group having from 1 to 10 carbon atoms, preferably of 1 to 4 carbon atoms, and in particular 1 to 2 carbon atoms, such as an ethoxy

[0114] - k denotes an integer from 0 to 3;

[0115] - Rf represents an alkyl group having from 1 to 10 carbon atoms and in particular of 1 to 4 carbon atoms and in particular 1 to 2 carbon atoms such as an ethyl.

[0116] Preferably, the pigment(s) according to the invention is / are coated with au less an alkoxysilane of formula (Ilb), their oligomers and / or mixtures thereof, such as

[0117] - Ra represents an alkyl group having from 1 to 10 carbon atoms, more preferably typically from 2 to 8 carbon atoms, like an octyl;

[0118] - Rb represents an alkyl group having from 1 to 6 carbon atoms, preferably of 1 to 4 carbon atoms, in particular 1 to 2 carbon atoms, notably an ethyl;

[0119] - Rc represents an alkoxy group having from 1 to 4 carbon atoms and in particular of 1 to 2 carbon atoms like an ethoxy;

[0120] - k is equal to 0;

[0121] - Rf represents an alkyl group having from 1 to 4 carbon atoms and in particular of 1 to 2 carbon atoms like an ethyl.

[0122] According to a preferred embodiment, the alkoxysilane of formula (Ilb) used for coating the pigment, its oligomers, and / or mixtures thereof is triethoxycapry-lylsilane.

[0123] According to a preferred embodiment, the pigment(s) according to the invention is (are) chosen from iron oxides, in particular iron (III) oxides such as Fe2O3, the alkoxysilane of formula (Ilb) used for coating said pigment is triethoxycaprylylsilane.

[0124] Triethoxycaprylylsilane coated iron (III) oxide Fe2O3 is sold by KOBO under the trade name BWRO-11S2.

[0125] The alkoxysilane(s) used for coating the pigment may be present in a total content ranging from 0.01 to 15%, preferably from 0.1 to 10%, preferably from 0.5 to 5% by weight relative to the total weight of the coated pigment.

[0126] The alkoxysilane(s) used for coating the pigment may be present in a total content ranging from 0.001 to 10%, preferably from 0.01 to 5%, preferably from 0.01 to 1% by weight relative to the total weight of composition A and / or composition B.

[0127] The pigments can be dispersed within the composition by means of a dispersing agent.

[0128] The dispersing agent serves to protect the dispersed particles from agglomeration or flocculation. This dispersing agent may be a surfactant, an oligomer, a polymer, or a mixture of several of these, possessing one or more functionalities with a strong affinity for the surface of the particles to be dispersed. In particular, they may adhere physically or chemically to the surface of the pigments. These dispersants also have at least one functional group that is compatible with or soluble in the continuous medium.In particular, esters of 12-hydroxystearic acid are used, especially C8 to C20 fatty acids and polyols such as glycerol, diglycerin, such as poly(12-hydroxystearic acid) stearate with a molecular weight of approximately 750g / mol such as that sold under the name Solsperse 21 000 by Avecia, polyglyceryl-2 dipolyhydroxystearate (name CTFA) sold under the reference Dehymyls PGPH by Henkel or polyhydroxystearic acid such as that sold under the reference Arlacel P100 by Uniqema and their mixtures.

[0129] As another dispersant that can be used in the compositions of the invention, we can mention quaternary ammonium derivatives of polycondensed fatty acids such as Solsperse 17 000 sold by Avecia, poly dimethylsiloxane / oxypropylene mixtures such as those sold by Dow Corning under the references DC2-5185, DC2-5225 C.

[0130] According to a particular embodiment of the invention, the dispersing agent is present with organic or inorganic pigments in submicron-sized particulate form in the coloring composition.

[0131] By "sub-micronic" or in English "sub-micronic" is meant pigments whose particle size has been micronized by micronization method and whose average particle size is less than one micrometer (pm), in particular between 0.1 and 0.9 pm, and preferably between 0.2 and 0.6 pm.

[0132] According to one embodiment, the dispersing agent and the pigment(s) are present in an amount (dispersant: pigment) between 1:4 and 4:1, particularly between 1.5:3.5 and 3.5:1 or better between 1.75:3 and 3:1.

[0133] The dispersing agent(s) may therefore have a silicone skeleton, such as silicone polyether and amino-silicone type dispersants, other than the al-coxysilanes of formula (I) or formula (!') previously described in the application. Suitable dispersing agents include: - amino-silicones, i.e., silicones comprising one or more amino groups such as than those marketed under the names and references: BYK LPX 21879, by BYK, GP-4, GP-6, GP-344, GP-851, GP-965, GP-967 and GP-988-1, marketed by Genesee les polymers, - silicone acrylates such as Tego ® RC 902, Tego ® RC 922, Tego ® RC 1041, and Tego ® RC 1043, marketed by Evonik, - polydimethylsiloxane (PDMS) silicones with carboxylic groups such as X-22162 and X-22370 by Shin-Etsu, silicone epoxy such as GP-29, GP-32, GP-502, GP-504, GP-514, GP-607, GP-682, and GP-695, by Genesee Polymers, or Tego ® RC 1401, Tego ® RC 1403, Tego ® RC 1412, by Evonik.

[0134] According to a particular embodiment, the dispersing agent(s) are of the amino-silicone type, different from the alkoxysilanes of formula (I) or formula (T) previously described in the application and are cationic.

[0135] The pigment(s) coated with at least one alkoxysilane of formula (I), (T) or (II) may be present in a total quantity ranging from 0.05 to 20% by weight, preferably from 0.1 to 15% by weight, better from 0.5 to 10% by weight relative to the total weight of composition A and / or composition B.

[0136] According to a particular embodiment, composition A and / or composition B may comprise a pigment different from the pigments coated with at least one alkoxysilane of formula (I), (I') or (II) as described above. Solvents:

[0137] Composition A and / or composition B used in the process according to the invention may include water.

[0138] Preferably, water is present in a content ranging from 0.1% to 99% by weight, more preferably from 1% to 98% by weight, better from 10% to 97% by weight relative to the total weight of composition A and / or composition B.

[0139] When composition A and / or composition B according to the invention comprises (include) water, the pH of composition A and / or composition B is preferably alkaline, more preferably, the pH of composition A and / or composition B is between 9 and 11. In order to adjust the pH, composition A and / or composition B may include an alkaline agent.

[0140] Preferably, composition A and / or composition B according to the invention comprises an alkaline agent. The pH of the compositions is measured at room temperature. Examples of alkaline agents include ammonia, alkanolamines, and / or basic amino acids. Preferably, the alkanolamine(s) are chosen from monoethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, N- dimethylaminoethanolamine, 2-amino-2-methyl-l-propanol, triisopropanolamine, 2-amino-2-methyl-l,3-propanediol, 3-amino-l,2-propanediol, 3-dimethylamino-1,2-propanediol, trishydroxymethylaminomethane. Preferably, the alkanolamine(s) are chosen from monoethanolamine and / or 2-amino-2-methyl-l-propanol.

[0141] For the purposes of this invention, "amino acid" means organic compounds having two functional groups: both a carboxyl group -COOH or car-boxylate and an amine group -NH2, the amine group optionally being methylated, i.e. in the form -NR2 or N+R3, where at least one R=CH3. Preferably, the amino acid(s) are chosen from aminocarboxylic acids such as alpha-aminocarboxylic acid. By "basic amino acid", we mean amino acids having an isoelectric point greater than 7. Preferably, the basic amino acid(s) are selected from arginine, lysine, ornithine and / or histidine, more preferably arginine and / or lysine.

[0142] According to a particular embodiment, composition A and / or composition B may comprise an inorganic alkali agent, preferably selected from ammonium hydroxide, sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, sodium phosphate, potassium phosphate, sodium silicate, sodium metasilicate, potassium silicate, sodium carbonate and / or potassium carbonate.

[0143] Composition A and / or composition B may also include acidifying agents to adjust the pH. Preferably, acidifying agents are chosen from citric acid, lactic acid, acetic acid and / or mineral acids such as hydrochloric acid, sulfuric acid, phosphoric acid and mixtures thereof. Additives:

[0144] Composition A and / or composition B according to the invention may also contain any adjuvant or additive usually used.

[0145] Among the additives that may be contained in the composition, we can mention reducing agents, thickening agents other than the polymers previously described, softeners, anti-foaming agents, moisturizing agents, UV filters, peptizers, dispersants, perfumes, anionic, cationic, non-ionic or amphoteric surfactants, proteins, vitamins, preservatives, fillers, waxes and mixtures thereof.

[0146] Composition A and / or composition B may be in the form of, in particular, a suspension, dispersion, gel, emulsion, in particular an oil-in-water (O / W) or water-in-oil (W / O) emulsion, or a multiple emulsion (W / O / O or polyol / O / O or H / E / H), in the form of a cream, foam, stick, vesicle dispersion, including ionic or non-ionic lipids, bi-phase or multi-phase lotion, anhydrous liquid or anhydrous gel.

[0147] According to a particular embodiment, composition A according to the invention is an anhydrous liquid or an anhydrous gel. According to a particular embodiment, composition B according to the invention is a dispersion.

[0148] A person skilled in the art will be able to choose the appropriate galenic form, as well as its method of preparation, on the basis of their general knowledge, taking into account on the one hand the nature of the constituents used, in particular their solubility in the support, and on the other hand the application envisaged for composition A and / or composition B.

[0149] According to a preferred embodiment, composition A according to the invention comprises at least one alkoxysilane of formula (I) as described above, at least one al-coxysilane of formula (II) as described above, and at least one pigment coated with at least one alkoxysilane of formula (I), (I') or (II) as described above.

[0150] According to a more preferred embodiment, composition A according to the invention comprises 3-aminopropyltriethoxysilane (APTES), methyltrimethoxysilane (MTMS) or methyltriethoxysilane (MTES) and at least one pigment coated with at least one alkoxysilane of formula (Ilb) as described above.

[0151] According to a more preferred embodiment, composition A according to the invention comprises 3-aminopropyltriethoxysilane (APTES), methyltrimethoxysilane (MTMS) or methyltriethoxysilane (MTES) and at least one iron oxide, preferably an iron (III) oxide such as Fe2O3 as pigment, said pigment being coated with at least one alkoxysilane of formula (Ilb) as described above, preferably triethoxycaprylylsilane.

[0152] According to a preferred embodiment, composition B according to the invention comprises at least one film-forming polymer selected from vinylpyrrolidone (PVP) homopolymers, vinylpyrrolidone copolymers, acrylamide copolymers, acrylic acid ester homopolymers or copolymers, ethylene homopolymers or copolymers and mixtures thereof.

[0153] According to a more preferred embodiment, composition B according to the invention comprises at least one film-forming polymer selected from vinylpyrrolidone (PVP) homopolymers, acrylamide copolymers, acrylic acid ester homopolymers or copolymers, ethylene homopolymers or copolymers and mixtures thereof. Keratin fiber processing method

[0154] The present invention relates to a method for coloring keratin fibers such as hair, including the following steps: a) the application to keratin fibers of at least one composition A comprising: - at least one alkoxysilane selected from the compounds of formula (I) or formula (!') as described above, their oligomers and / or mixtures thereof, and - at least one alkoxysilane of formula (II) as described above, its oligomers and / or mixtures thereof, and b) the application to keratin fibers of at least one composition B comprising at least one film-forming polymer as described above, composition A and / or composition B comprising at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (I') or (II) as described above.

[0155] Preferably, composition A and composition B according to the invention are compositions for coloring keratin fibers, such as hair.

[0156] Composition A and composition B can be applied simultaneously or sequentially. Preferably, composition A and composition B are applied sequentially.

[0157] Thus, preferably, composition A is first applied to the keratin fibers followed by composition B in a second step.

[0158] According to a preferred embodiment, the process for coloring keratin fibers such as hair comprises: (i) the application to said keratin fibers of composition A according to the invention comprising: - at least one alkoxysilane selected from the compounds of formula (I) or formula (I') as described above, their oligomers and / or mixtures thereof, - at least one alkoxysilane of formula (II) as described above, its oligomers and / or mixtures thereof, and - at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (I') or (II) as described above, ii) optionally an exposure time of 10 seconds to 20 minutes, in particular from 20 seconds to 10 minutes, preferably from 30 seconds to 5 minutes of composition A on said fibers, iii) optionally a washing, rinsing, spinning or drying step for said fibres, (iv) the application to said keratin fibers of composition B according to the invention comprising at least one film-forming polymer as described above, (v) optionally an exposure time of 10 seconds to 20 minutes, in particular from 20 seconds to 10 minutes, preferably from 30 seconds to 5 minutes of composition B according to the invention on said fibers, vi) optionally a washing, rinsing, spinning and vii) optionally a drying and / or heating step of the keratin fibers for example at a temperature greater than or equal to 30°C.

[0159] According to a preferred embodiment, the process for coloring keratin fibers such as hair comprises: (i) the application to said keratin fibers of composition A according to the invention comprising: - at least one alkoxysilane chosen from the compounds of formula (I) or formula (!') as described above, their oligomers and / or mixtures thereof, - at least one alkoxysilane of formula (II) as described above, its oligomers and / or mixtures thereof, ii) optionally an exposure time of 10 seconds to 20 minutes, in particular from 20 seconds to 10 minutes, preferably from 30 seconds to 5 minutes of composition A on said fibers, iii) optionally a washing, rinsing, spinning or drying step for said fibres, (iv) the application of composition B according to the invention comprising: - at least one film-forming polymer as described above, and - at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (I') or (II) as described above, (v) optionally an exposure time of 10 seconds to 20 minutes, in particular from 20 seconds to 10 minutes, preferably from 30 seconds to 5 minutes of composition B according to the invention on said fibers, vi) optionally a washing, rinsing, spinning and vii) optionally a drying and / or heating step of the keratin fibers for example at a temperature greater than or equal to 30°C.

[0160] According to a preferred embodiment, the process for coloring keratin fibers such as hair comprises: (i) the application to said keratin fibers of composition A according to the invention comprising: - at least one alkoxysilane selected from the compounds of formula (I) or formula (I') as described above, their oligomers and / or mixtures thereof, - at least one alkoxysilane of formula (II) as described above, its oligomers and / or mixtures thereof, - at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (I') or (II) as described above, (ii) optionally an exposure time of 10 seconds to 20 minutes, in particular from 20 seconds to 10 minutes, preferably from 30 seconds to 5 minutes of composition A on said fibers, iii) optionally a washing, rinsing, spinning or drying step for said fibres, (iv) the application of composition B according to the invention comprising: - at least one film-forming polymer as described above, and - at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (1') or (II) as described above, (v) optionally an exposure time of 10 seconds to 20 minutes, in particular from 20 seconds to 10 minutes, preferably from 30 seconds to 5 minutes of composition B according to the invention on said fibers, vi) optionally a washing, rinsing, spinning and vii) optionally a drying and / or heating step of the keratin fibers for example at a temperature greater than or equal to 30°C.

[0161] The term "rinsing step" refers to the application of water to the keratin fibers.

[0162] Compositions A and B according to the invention can be implemented on fibers dry or wet keratin, as well as on all types of fibers, light or dark, natural or colored, permed, bleached or straightened.

[0163] According to a particular embodiment of the process of the invention, the fibers are washed before application of compositions A and B according to the invention.

[0164] The application of compositions A and B according to the invention on keratin fibers can be carried out by any conventional means, in particular by means of a comb, a brush, a brush or the fingers.

[0165] The coloring process, i.e. the application of compositions A and B according to the invention on the keratin fibers, is generally carried out at room temperature (between 15 and 25°C).

[0166] After application of composition A or composition B to the keratin fibers, it is preferable to have a setting time of 10 seconds to 20 minutes, in particular 20 seconds to 10 minutes, preferably 30 seconds to 5 minutes of composition A or composition B on said fibers.

[0167] According to a particular embodiment, the process for coloring keratin fibers such as hair comprises: (i) the preparation of composition A according to the invention by mixing a first composition A' and a second composition A” wherein the first composition A' comprises: - at least one alkoxysilane selected from the compounds of formula (I) or formula (I') as described above, their oligomers and / or mixtures thereof, and - at least one alkoxysilane of formula (II) as described above, its oligomers and / or mixtures thereof and the second composition A' ' comprises at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (!') or (II) as described above, ii) the application of composition A according to the invention to said keratin fibers, ii) optionally a leave-on time of 10 seconds to 20 minutes, in particular from 20 seconds to 10 minutes, preferably from 30 seconds to 5 minutes, of composition A on said fibers, iii) optionally a washing, rinsing, spinning or drying step for said fibres, (iv) the application of composition B according to the invention comprising at least one film-forming polymer as described above, and (v) optionally an exposure time of 10 seconds to 20 minutes, in particular from 20 seconds to 10 minutes, preferably from 30 seconds to 5 minutes of composition B according to the invention on said fibers, vi) optionally a washing, rinsing, spinning and vii) optionally a drying and / or heating step of the keratin fibers for example at a temperature greater than or equal to 30°C.

[0168] In order to allow better preservation of composition A', it preferably comprises a low water content or is anhydrous.

[0169] Preferably, composition A' comprises a water content of between 0.001 and 10% by weight, better between 0.5 and 10% by weight, more preferably between 1 and 8% by weight relative to the weight of composition A'.

[0170] Composition A' ' may also contain water.

[0171] According to a particular embodiment, the process for coloring keratin fibers such as hair comprises: (i) the preparation of composition A according to the invention by mixing a first composition A' and a second composition A” wherein the first composition A' comprises: - at least one alkoxysilane selected from the compounds of formula (I) or formula (I') as described above, their oligomers and / or mixtures thereof, and - at least one alkoxysilane of formula (II) as described above, its oligomers and / or mixtures thereof and the second composition A' comprises at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (I') or (II) as described above, and ii) the application of composition A according to the invention to said keratin fibers, ii) optionally a leave-on time of 10 seconds to 20 minutes, in particular from 20 seconds to 10 minutes, preferably from 30 seconds to 5 minutes of composition A on said fibers, iii) optionally a washing, rinsing, spinning or drying step for said fibres, (iv) the application of composition B according to the invention comprising: - at least one film-forming polymer as described above, and - at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (!') or (II) as described above. (v) optionally an exposure time of 10 seconds to 20 minutes, in particular from 20 seconds to 10 minutes, preferably from 30 seconds to 5 minutes of composition B according to the invention on said fibers, vi) optionally a washing, rinsing, spinning and vii) optionally a drying and / or heating step of the keratin fibers for example at a temperature greater than or equal to 30°C.

[0172] After application of compositions A and B according to the invention and before any possible step of applying heat to the keratin fibers, the keratin fibers can be subjected to a drying step, using for example a hair dryer.

[0173] The drying step can be carried out for a period of between 20 seconds and 5 minutes.

[0174] The drying step can be carried out using absorbent paper, a hair dryer, a hair dryer helmet or in the open air.

[0175] Preferably, the drying step is carried out using a hairdryer at a temperature of 30°C or higher, more particularly at a temperature above 30°C and below 110°C

[0176] After applying compositions A and B according to the invention to the keratin fibers, one can wait at least 10 seconds, preferably at least 30 seconds before the drying step of the keratin fibers.

[0177] After application of compositions A and B according to the invention and optionally a drying step of the keratin fibers, the process according to the invention may include a step of applying heat to the keratin fibers using a heating tool.

[0178] Preferably, the process according to the invention does not include a step of applying heat to the keratin fibers using a heating tool in addition to the possible drying step.

[0179] The heat application step of the process of the invention can be carried out using a helmet, a hair dryer, a straightening or curling iron, a climazon,

[0180] Preferably, the heat application step of the process of the invention is put into work using a hair dryer and / or a straightener, more preferably using a hair dryer.

[0181] During the heat application step on the keratin fibers, a mechanical action on the strands can be exerted such as combing, brushing, passing with fingers.

[0182] When the heat application step on the keratin fibers is carried out using a helmet or a hair dryer, the temperature is preferably between 30 and 110°C, preferably between 50 and 90°C.

[0183] When the heat application step on the keratin fibers is carried out using a hair straightener, the temperature is preferably between 110 and 240°C, preferably between 110 and 200°C. Multi-compartment device (kit)

[0184] The present invention also relates to a coloring kit for keratin fibers such as hair, comprising several compartments containing: - in a first compartment, a composition A comprising: - at least one alkoxysilane chosen from the compounds of formula (I) or formula (!') as described above, their oligomers and / or mixtures thereof, - at least one alkoxysilane of formula (II) as described above, its oligomers and / or mixtures thereof, - in a second compartment, a composition B according to the invention comprising at least one film-forming polymer, composition A and / or composition B comprising at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (I') or (II) as described above.

[0185] According to a preferred embodiment, the keratin fiber coloring kit, such as for hair, comprises several compartments containing: - in a first compartment, a composition A according to the invention comprising: - at least one alkoxysilane selected from the compounds of formula (I) or formula (I') as described above, their oligomers and / or mixtures thereof, - at least one alkoxysilane of formula (II) as described above, its oligomers and / or mixtures thereof, and - at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (I') or (II) as described above, - in a second compartment, a composition B according to the invention comprising at least one film-forming polymer as described above.

[0186] The present invention also relates to a coloring kit for keratin fibers such as hair, comprising several compartments containing: - in a first compartment, a composition A' comprising: - at least one alkoxysilane selected from the compounds of formula (I) or formula (T) as described above, their oligomers and / or mixtures thereof, and - at least one alkoxysilane of formula (II) as described above, its oligomers and / or mixtures thereof; - in a second compartment, a composition A' ' comprising at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (I') or (II) as described above. - in a third compartment, a composition B according to the invention comprising at least one film-forming polymer as described above.

[0187] The present invention will now be described more specifically by means of examples, which are in no way limiting to the scope of the invention. However, the examples will support specific features, variants, and preferred embodiments of the invention. Examples

[0188] In the examples, the temperature is given in degrees Celsius, and corresponds to the ambient temperature (20-25°C), unless otherwise stated, and the pressure is atmospheric pressure, unless otherwise stated.

[0189] The following compositions are prepared (in g / 100g of raw material as is):

[0190] [Tables] Composition A' 3-aminopropyltriethoxysilane (APTES)(1) 24 Methyltriethoxysilane (MTES) 72 Ethanol Qsp 100 [Tables2] Composition Al” A2” Iron oxides (2) 10 - Iron oxides (and) triethoxycaprylylsilane (3) - 10 Hydroxypropylcellulose 4 4 ​​Ethanol Qsp 100 Qsp 100

[0192] [Tables3] Composition B Ethylene / sodium acrylate copolymer (4) 15 Water q.s. 100

[0193] 1. Sold under the trade name KBE-903 by the company Shin Etsu; 2. Sold under the trade name SUNPURO RED IRON OXIDE by the company SUN 3. Sold under the trade name BWRO-11S2 by the company KOBO; 4. Sold under the trade name ECOSMOOTH SATIN by Dow Corning (with 25% active ingredient in water). Protocol:

[0194] Composition A' is mixed with comparative composition Al” on the one hand and composition according to the invention A2” on the other hand in a ratio of 50 / 50 in order to obtain compositions Al and A2.

[0195] The comparative composition A1 and the composition according to the invention A2 are applied with a finger to strands of dry brown hair (HT4), at a rate of 1 g of composition per gram of strand.

[0196] The hair strands are left at room temperature for 2 minutes.

[0197] Composition B is then applied with a finger to the strands of hair treated respectively with composition A1 or composition A2, at a rate of 1 g of composition per gram of strand.

[0198] The hair strands are left at room temperature for 5 minutes.

[0199] The hair strands are then dried with a hairdryer for 2 minutes.

[0200] The hair strands are left at room temperature for 24 hours.

[0201] The hair strands thus colored are subjected to shampooing so as to evaluate the tenacity (residual effect) of the color obtained by shampooing, according to the shampooing protocol described below. Shampooing protocol:

[0202] Shampooing is performed on the strands obtained after application of the hair dryer.

[0203] The hair strands are washed using a standard shampoo (Garnier Ultra Doux).

[0204] The hair strands are then rinsed, combed, and blow-dried. Results:

[0205] The persistence of the color of the highlights to shampoos was evaluated in the CIE L*a*b* system, using a Minolta Spectrophotometer CM3600A colorimeter (illuminant D65, angle 10°, specular component included).

[0206] In this L*a*b* system, L* represents the intensity of the color, a* indicates the green / red color axis and b* the blue / yellow color axis.

[0207] The persistence of the color is evaluated by the color difference AE between the strands The hair was colored before shampooing, then again after one shampoo according to the protocol described above. The lower the AE value, the longer the color lasts through shampooing.

[0208] The value of AE is calculated according to the following equation:

[0209] [Math.l] + (a* - s. 'r + d? - ».

[0210] In this equation, L*, a*, b* represent the values ​​measured after hair coloring and after shampooing, and L0*, a0*, b0* represent the values ​​measured after hair coloring and before shampooing.

[0211] The results are shown in the table below:

[0212] [Tables4] Compositions Number of shampoos L* a* b* AE compared to strand before and after shampooing Composition A2 + B (invention) 0 21.3 8.9 6.6 - 1 21.4 8.2 6.4 0.7 Composition Al + B (comparative) 0 22.3 11.3 7.9 - 1 20.8 9.2 6.8 2.8

[0213] Hair strands colored with compositions A2 + B according to the invention comprising at least one pigment coated with at least one alkoxysilane and washed with shampoo exhibit low AE values ​​compared to hair strands colored with comparative compositions Al + B not comprising pigment coated with at least one alkoxysilane and washed with shampoo.

[0214] The coloured coating obtained from the process according to the invention therefore exhibits good residual shampoo.

Claims

Demands

1. A method for coloring keratin fibers such as hair, comprising the following steps: a) the application to keratin fibers of at least one composition A comprising: - at least one alkoxysilane chosen from the following compounds of formula (I) or formula (!'), their oligomers and / or mixtures: in which: - Ra represents an alkyl group having from 1 to 20 carbon atoms, preferably from 1 to 10 carbon atoms, more preferably from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as a methyl, said alkyl group possibly being substituted by an aryl group; an alkoxy group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as an ethoxy; or an aryl group having from 6 to 12 carbon atoms; Rb and Rc; identical or different represent a hydrogen atom; an alkyl group having from 1 to 20 carbon atoms, preferably from 1 to 6 carbon atoms and in particular from 1 to 4 carbon atoms, in particular an ethyl group, it being understood that if Ra does not represent an alkoxy group, then Rb and Rc cannot simultaneously represent a hydrogen atom; Rd and Re, whether identical or different, represent a hydrogen atom; an alkyl group having from 1 to 20 carbon atoms, preferably from 1 to 6 carbon atoms and particularly from 1 to 4 carbon atoms; a cycloalkyl group having from 3 to 20 carbon atoms; an aryl group having 6 to 12 carbon atoms; an aminoalkyl group having 1 to 20 carbon atoms; - A independently represents an alkylene group having from 1 to 10 linear or branched carbon atoms, which may be interrupted by at least one heteroatom chosen from O, S, NH or a carbonyl group (CO), preferably NH - Q represents a carbonyl group (CO); - r denotes an integer ranging from 0 to 1, and - at least one alkoxysilane of the following formula (II), its oligomers and / or mixtures thereof: in which: - Ra represents an alkyl group having from 1 to 20 carbon atoms, preferably from 1 to 10 carbon atoms, more preferably from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as a methyl, said alkyl group possibly being substituted by an aryl group; an alkoxy group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as an ethoxy; or an aryl group having from 6 to 12 carbon atoms; - Rb represents a hydrogen atom or an alkyl group having from 1 to 20 carbon atoms, preferably from 1 to 6 carbon atoms and in particular from 1 to 4 carbon atoms, in particular an ethyl group; - Rc represents an alkyl group having from 1 to 20 carbon atoms, preferably from 1 to 10 carbon atoms, more preferably from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as a methyl, said alkyl group possibly being substituted by an aryl group; an alkoxy group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as an ethoxy; or an aryl group having from 6 to 12 carbon atoms; It is understood that if Ra and Rc do not represent an alkoxy group, then Rb cannot represent a hydrogen atom. - k denotes an integer ranging from 0 to 5, preferably ranging from 0 to 3; - Rf represents a hydrogen atom; an alkyl group having from 1 to 10 carbon atoms and in particular from 1 to 4 carbon atoms; or a group with the following formula (lia): , (lia) in which Rn represents a hydroxyl group (OH); an alkyl group having from 1 to 10 carbon atoms, preferably a methyl, and b) the application to the keratin fibers of at least one composition B comprising at least one film-forming polymer, composition A and / or composition B comprising at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (I') or (II) as defined above.

2. A method according to claim 1, wherein the alkoxysilane(s), their oligomers and / or mixtures thereof are selected from the compounds of formula (I) in which: - Ra represents an alkyl group having from 1 to 10 carbon atoms, in particular from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms, preferably a methyl, or an alkoxy group having from 1 to 4 carbon atoms, preferably from 1 to 2 carbon atoms, preferably an ethoxy; - Rb and Rc, identical or different, represent an alkyl group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms like an ethyl; - Rd and Re, identical, represent a hydrogen atom or Rd designates a hydrogen atom and Re designates a C5-C6 cycloalkyl radical such as cyclohexyl; - A independently represents an alkylene group having from 1 to 10 linear or branched carbon atoms, which can be interrupted by at least one heteroatom chosen from O, S, NH or a carbonyl group (CO), preferably NH; - r denotes an integer equal to 0.

3. A method according to any one of the preceding claims, wherein the alkoxysilane(s), their oligomers and / or mixtures thereof are selected from compounds of formula (I) in which Ra represents an ethoxy group, Rb and Rc are identical and represent a ethyl, Rd and Re represent a hydrogen atom, A represents a propylene and r denotes an integer equal to 0.

4. A process according to any one of the preceding claims, wherein the alkoxysilane(s) of formula (I) or formula (I'), their oligomers and / or mixtures thereof is (are) present in a total amount of 0.1 to 40% by weight, preferably 0.5 to 30% by weight, preferably 0.75 to 25% by weight, better 1 to 20% by weight, even better 1.5 to 15% by weight, relative to the total weight of composition A.

5. A process according to any one of the preceding claims, wherein the alkoxysilane(s) of formula (II), their oligomers and / or mixtures thereof are such that: - Ra represents an alkyl group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms, in particular from 1 to 2 carbon atoms such as a methyl or an ethyl; - Rb represents an alkyl group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms, in particular from 1 to 2 carbon atoms such as a methyl or an ethyl; - Rc represents an alkoxy group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as a methoxy or an ethoxy; - k denotes an integer equal to 0; - Rf represents an alkyl group having from 1 to 10 carbon atoms, and in particular from 1 to 4 carbon atoms, such as a methyl or ethyl group, preferably methyltrimethoxysilane (MTMS) or methyltriethoxysilane (MTES).

6. A process according to any one of the preceding claims, wherein the alkoxysilane(s) of formula (II), its oligomers and / or mixtures thereof is (are) present in a total amount from 0.5 to 90% by weight, preferably from 1 to 75%, preferably from 3 to 45% by weight, better from 5 to 40% by weight relative to the total weight of composition A.

7. A method according to any one of the preceding claims, wherein the film-forming polymer(s) are selected from vinylpyrrolidone (PVP) homopolymers, acrylamide copolymers, acrylic acid ester homopolymers or copolymers, ethylene homopolymers or copolymers and mixtures thereof.

8. A method according to any one of the preceding claims, in

9.

10. in which the film-forming polymer(s) is / are present in a total quantity ranging from 0.1 to 30% by weight, preferably from 0.5 to 25% by weight, even better from 1 to 20% by weight, relative to the total weight of composition B. A method according to any one of the preceding claims, wherein the pigment(s) are selected from mineral pigments, preferably iron oxides, in particular iron (III) oxides such as Fe2O3. A method according to any one of the preceding claims, wherein the pigment(s) according to the invention is (are) coated with at least one alkoxysilane of the following formula (Ilb), their oligomers and / or mixtures thereof: R (Ilb)

11. in which: - Ra represents an alkyl group having from 1 to 20 carbon atoms, preferably from 1 to 10 carbon atoms, more preferably from 2 to 8 carbon atoms, said alkyl group possibly being substituted by an aryl group; an alkoxy group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as an ethoxy; - Rb represents an alkyl group having from 1 to 20 carbon atoms, preferably from 1 to 6 carbon atoms and in particular from 1 to 4 carbon atoms, in particular an ethyl; - Rc represents an alkoxy group having from 1 to 10 carbon atoms, preferably from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as an ethoxy; - k denotes an integer ranging from 0 to 3; - Rf represents an alkyl group having from 1 to 10 carbon atoms and in particular from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as an ethyl. A method according to the preceding claim, wherein the pigment(s) according to the invention is / are coated with at least one alkoxysilane of formula (Ilb), their oligomers and / or mixtures thereof. that: - Ra represents an alkyl group having from 1 to 10 carbon atoms, more preferably from 2 to 8 carbon atoms, such as an octyl; - Rb represents an alkyl group having from 1 to 6 carbon atoms, preferably from 1 to 4 carbon atoms, in particular from 1 to 2 carbon atoms, notably an ethyl; - Rc represents an alkoxy group having from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as an ethoxy; - k is equal to 0; - Rf represents an alkyl group having from 1 to 4 carbon atoms and in particular from 1 to 2 carbon atoms such as an ethyl.

12. A process according to any one of the preceding claims, wherein the pigment(s) coated with at least one alkoxysilane of formula (I), (!') or (II) are present in a total amount from 0.05 to 20% by weight, preferably from 0.1 to 15% by weight, better from 0.5 to 10% by weight relative to the total weight of composition A and / or composition B.

13. A process according to any one of the preceding claims, wherein composition A and / or composition B comprises (include) at least one non-ionic non-associative cellulosic polymer selected from hydroxyalkyl(Ci-C4)celluloses, preferably hydroxyethylcellulose and / or hydroxypropylcellulose.

14. A process according to the preceding claim, wherein the non-associative non-ionic cellulosic polymer(s) is / are present in a total amount preferably from 0.01 to 10% by weight, preferably from 0.05% to 5% by weight, better from 0.1 to 3% by weight relative to the total weight of composition A and / or composition B.

15. A coloring kit for keratin fibers such as hair, comprising several compartments containing: - in a first compartment, a composition A comprising: at least one alkoxysilane selected from the compounds of formula (I) or formula (I') as described in any one of claims 1 to 4, their oligomers and / or mixtures thereof; and at least one alkoxysilane of formula (II) as described in any one of claims 1, 5 or 6, its oligomers and / or mixtures thereof; - in a second compartment, a composition B comprising at less a film-forming polymer as described in any one of claims 1, 7 or 8, composition A and / or composition B comprising at least one pigment, said pigment being coated with at least one alkoxysilane of formula (I), (!'), or of formula (II) as described according to any one of claims 1-3, 5, 9-12.