RU2283643C2 - Composition for oxidative coloring of human keratin fibers - Google Patents

Abstract

FIELD: cosmetic industry.

SUBSTANCE: invention relates to composition for oxidative coloring of human keratin fibers, in particular hairs. Claimed composition contains in cosmetically acceptable medium based on water and at basic pH at least one oxidative colorant and alkalization agent comprising sodium metalosilicate and aqueous ammonia, wherein ammonia amount is 0.1-1.6 mass % based on composition mass; to coloring method using said composition and ready to use composition for oxidative coloring of human keratin fibers, in particular hairs.

EFFECT: composition with reduced irritation odor and risk of skin irritation.

30 cl, 3 ex

Description

The subject of the invention is a composition for the oxidative dyeing of human keratin fibers, and in particular, hair, containing in a cosmetically acceptable medium based on water and at a basic pH, at least one oxidative dye and an alkalizing agent consisting of sodium metasilicate and aqueous ammonia, and staining method using the specified composition.

It is known to dye keratin fibers of a person, and in particular, hair, by dyeing compositions containing oxidative dyes. Oxidizing dyes contain dye precursors and color-forming substances. Oxidative dye precursors, commonly referred to as oxidation bases, are colorless or slightly colored compounds which, when combined with oxidizing agents, can produce colored and coloring compounds by oxidative condensation. In particular, they are ortho or paraphenylenediamines, ortho or paraaminophenols or heterocyclic bases.

Hues obtained with the indicated oxidation bases can be modified by combining the indicated bases with color-forming substances or color modifiers, color-forming substances are selected, in particular, from aromatic methadiamines, meta-aminophenols, methadiphenols and some heterocyclic compounds.

Various molecules used in oxidation bases and color-forming substances provide a rich palette of colors.

The method of oxidative dyeing consists in applying oxidative bases or a mixture of oxidizing bases and color-forming substances with an oxidizing agent, most often with hydrogen peroxide, to the fibers, allowing them to act and then rinsing the fibers. Application, which is usually carried out at a basic pH, makes it possible to obtain dyeing and at the same time clarification of the fibers, which in practice leads to the possibility of obtaining a final color that is lighter than the original color. Additionally, lightening the fibers has the advantage of generating a uniform color in the case of gray hair and in the case of naturally pigmented fibers, making the color stable, so to speak, making it more pronounced.

The lightening of hair is evaluated on a tone scale, which is characterized by the degree or level of lightening. The concept of “tone” is based on the classification of natural shades, the tone that separates each shade from immediately following it or from the one preceding it. This definition and classification of natural shades is well known to professional stylists and published in the book “Sciences des traitements capillaires” [Science of hair treatment] Charies ZVIAK, 1988, published by Masson, pp. 215 and 278.

The interval on the tone scale is determined from 1 (black) to 10 (light blond); one unit corresponds to one tone; the higher the number, the brighter the shade.

Since modern brightening technology of oxidative dyeing makes it possible to achieve clarification of the fiber from 2 tones to 2 and a half tones and hair coatings that are 100% white, it was still required to use aqueous ammonia in high concentrations as an alkalizing agent.

However, as everyone knows, aqueous ammonia has a big drawback, that is, it emits a very annoying and unpleasant odor during the application of the dye. It also sometimes causes, in high concentrations, irritation of the scalp in the form of tingling sensations.

Currently, after a large scientific study conducted on the subject, the applicants have found that it is possible to reduce the irritating smell and the risk of irritating the scalp with these dyes, while at the same time obtaining an acceptable level of lightening and intense coloring in various shades, using a mixture as an alkalizing agent sodium metasilicate and aqueous ammonia.

This discovery is the basis of this invention.

The first subject of the invention is therefore a coloring composition for the oxidative dyeing of human keratin fibers and, more specifically, an oxidizer-free hair, containing in a cosmetically acceptable medium based on water and at a basic pH, at least one oxidizing dye and alkalizing agent, characterized in that the alkalizing agent is a combination of sodium metasilicate and aqueous ammonia.

By the term “coloring composition” is meant, for the purposes of the invention, a composition containing at least one oxidative dye, which during use must be in the presence of an oxidizing agent.

The coloring composition in accordance with the invention makes it possible to reduce the amount of commonly used aqueous ammonia, since the coloring properties are excellently supported, and makes it possible to obtain less odorous and less irritating products.

The subject of the invention is also a method for the oxidative dyeing of human keratin fibers, and more specifically, hair, using said coloring composition. The method involves mixing, during use, a coloring composition containing 0.4-1.3 wt.% Ammonia relative to the total weight of the coloring composition, with an oxidizing composition containing hydrogen peroxide or a compound capable of releasing hydrogen peroxide in situ, or redox enzyme; the amount of the oxidizing composition is at most 6 times the amount of the coloring composition; the resulting mixture is then applied to the fibers and allowed to act, after which the fibers are rinsed, optionally washed with shampoo and rinsed again, and dried.

The invention also relates to a method for oxidatively dyeing human keratin fibers, and more specifically, hair, using said coloring composition. The method involves mixing, during use, a coloring composition containing 1-3 wt.% Sodium metasilicate relative to the total weight of the coloring composition, with an oxidizing composition containing hydrogen peroxide or a compound capable of releasing hydrogen peroxide in situ, or a redox enzyme; the amount of the oxidizing composition at least corresponds to the amount of the coloring composition; the resulting mixture is then applied to the fibers, left to act, then rinsed, optionally washed with shampoo and rinsed again, and dried.

Another subject of the invention is a ready-to-use composition for the oxidative dyeing of human keratin fibers, and more specifically, hair, containing a mixture of the dye composition described above, comprising 0.4-1.3 wt.% Ammonia relative to the total weight of the dye composition, with an oxidizing composition; the amount of the oxidizing composition is at most 6 times the amount of the coloring composition.

Another subject of the invention is a ready-to-use composition for oxidatively dyeing human keratin fibers, and more specifically, hair, comprising a mixture of a dye composition described above, comprising 1-3 wt.% Sodium metasilicate relative to the total weight of the dye composition, with an oxidizing composition; the amount of the oxidizing composition is at least equal to the amount of the coloring composition.

By the term “ready-to-use composition” is meant, for the purposes of the invention, a composition intended to be applied to keratin fibers, that is, one that can be stored before use or may be the result of mixing the two compositions immediately before use.

Alkalizing agent

The combination of sodium metasilicate and aqueous ammonia according to the invention, used as an alkalizing agent, makes it possible to adjust the pH of the coloring composition of the invention to a basic pH, more particularly a pH of from 7.5 to 13, and preferably from 8.5 to 11.5 .

According to the present invention, said combination contains, as an active substance, more specifically at least 0.1 wt.%, Preferably at least 0.5 wt.% And, more preferably at least 1 wt.% sodium metasilicate relative to the total weight of the coloring composition.

Moreover, the amount of sodium metasilicate in the combination is advantageously at most 6 wt.%, More specifically at most 5 wt.% And preferably at most 3 wt.% Relative to the total weight of the ink composition.

More specifically, said combination contains from about 0.1 to 6 wt.% Sodium metasilicate as an active substance, preferably from 0.5 to 5 wt.% And, more preferably, from 1 to 3 wt.% Relative to the total mass of the coloring composition.

According to the present invention, said combination contains, as an active substance, more specifically at least 0.1 wt.%, Preferably at least 0.4 wt.%, And more preferably at least 0.6 wt.% ammonia relative to the total weight of the coloring composition.

Moreover, the amount of ammonia in combination, in particular, is at most 1.6 wt.%, Preferably at most 1.3 wt.%, More preferably at most 1.2 wt.% And, more specifically, at most 1 wt.% Relative to the total weight of the coloring composition.

More specifically, the combination contains from about 0.1 to 1.6 wt.% Ammonia, preferably from 0.4 to 1.3 wt.%, More specifically from 0.4 to 1.2 wt.% And, more preferably , from 0.6 to 1 wt.%, relative to the total weight of the coloring composition.

It should be noted that according to an advantageous embodiment of the invention, the mass ratio of ammonia to sodium metasilicate is in the range between 0.02 and 15, more specifically, between 0.1 and 5, preferably between 0.3 and 2 and, more preferably, between 0 , 4 and 1.

According to this invention, sodium metasilicate [Na ₂ SiO ₃ ] is an anhydrous compound, but can also be in hydrated forms with 5 or 9 water molecules. Ammonia is introduced into the composition in the form of aqueous ammonia, which is an aqueous solution of ammonia. Commonly used aqueous ammonia has a titer of from 20 to 25% by weight of ammonia.

This invention makes it possible to reduce the amount of aqueous ammonia based on an aqueous solution having a titer of 20.5% ammonia, from 20 to 80%, and more particularly from 30 to 60%.

Wednesday

The cosmetically acceptable coloring medium according to the invention consists of water or a mixture of water and at least one organic solvent for dissolving compounds which may not be sufficiently soluble in water. As the organic solvent, for example, C ₁ -C ₄ alkanols such as ethanol and isopropanol can be given; glycerol; glycols and glycol ethers such as 2-butoxyethanol, propylene glycol, propylene glycol monomethyl ether, monoethyl ether and diethylene glycol monomethyl ether; and aromatic alcohols, such as benzyl alcohol or phenoxyethanol, similar substances and mixtures thereof.

Solvents may be present in proportions, preferably in the range of 1 to 40% by weight relative to the total weight of the coloring composition, and even more preferably about 5 to 30% by weight.

Oxidizing Dyes

Oxidizing dyes that can be used according to the invention are selected from oxidation bases and / or color-forming substances.

Preferably, the compositions according to the invention contain at least one oxidation base.

The oxidation bases are selected from those conventionally known in oxidative dyeing, among which, in particular, ortho and paraphenylenediamines, double bases, ortho and paraaminophenols, the following heterocyclic bases and their acid addition salts can be noted.

May be given, in particular:

(I) paraphenylenediamines of the following formula (I) and their acid addition salts:

wherein:

R ₁ means a hydrogen atom, a C ₁ -C ₄ alkyl radical, a monohydroxy (C ₁ -C ₄ ) alkyl radical, a polyhydroxy (C ₂ -C ₄ ) alkyl radical, (C ₁ -C ₄ ) alkoxy (C ₁ -C ₄ ) an alkyl radical, a C ₁ -C ₄ alkyl radical substituted with a nitrogen-containing group, a phenyl radical or a 4'-aminophenyl radical;

R ₂ means a hydrogen atom, a C ₁ -C ₄ alkyl radical, a monohydroxy (C ₁ -C ₄ ) alkyl radical, a polyhydroxy (C ₂ -C ₄ ) alkyl radical, (C ₁ -C ₄ ) alkoxy (C ₁ -C ₄ ) an alkyl radical or a C ₁ -C ₄ alkyl radical substituted with a nitrogen-containing group;

R ₁ and R ₂ can also form a 5- or 6-membered nitrogen-containing heterocycle optionally substituted with one or more alkyl, hydroxyl or ureido groups together with the nitrogen atom carrying them;

R ₃ means a hydrogen atom, a halogen atom such as a chlorine atom, a C ₁ -C ₄ alkyl radical, a sulfo radical, a carboxy radical,

monohydroxy (C ₁ -C ₄ ) alkyl radical,

hydroxy (C ₁ -C ₄ ) alkoxy radical, acetylamino (C ₁ -C ₄ ) alkoxy radical,

mesylamino (C ₁ -C ₄ ) alkoxy radical or

carbamoylamino (C ₁ -C ₄ ) alkoxy radical;

R ₄ means a hydrogen atom, or a halogen, or a C ₁ -C ₄ alkyl radical.

Among the nitrogenous groups of formula (I) may be mentioned are, in particular, amino, mono (C ₁ -C ₄₎ alkylamino (C ₁ -C ₄₎ dialkylamino, (C ₁ -C ₄₎ trialkilaminogruppa, monohydroxy (C ₁ -C ₄ ) alkylamino group, imidazolinium and ammonium radicals.

Among the paraphenylenediamines of the above formula (I), in particular, paraphenylenediamine, paratolylenediamine, 2-chloroparaphenylenediamine,

2,3-dimethylparaphenylenediamine, 2,6-dimethylparaphenylenediamine,

2,6-diethylparaphenylenediamine, 2,5-dimethylparaphenylenediamine,

N, N-dimethylparaphenylenediamine, N, N-diethylparaphenylenediamine,

N, N-dipropylparaphenylenediamine, 4-amino-N, N-diethyl-3-methylaniline,

N, N-bis (β-hydroxyethyl) paraphenylenediamine,

4-N, N-bis (β-hydroxyethyl) amino-2-methylaniline,

4-N, N-bis (β-hydroxyethyl) amino-2-chloroaniline,

2-β-hydroxyethylparaphenylenediamine, 2-fluoroparaphenylenediamine,

2-isopropylparaphenylenediamine,

N- (β-hydroxypropyl) paraphenylenediamine,

2-hydroxymethylparaphenylenediamine,

N, N-dimethyl-3-methylparaphenylenediamine,

N, N- (ethyl-β-hydroxyethyl) paraphenylenediamine,

N- (β, γ-dihydroxypropyl) paraphenylenediamine,

N- (4'-aminophenyl) paraphenylenediamine, N-phenylparaphenylenediamine,

2-β-hydroxyethyloxyparaphenylenediamine,

2-β-acetylamino-ethyloxyparaphenylenediamine,

N- (β-methoxyethyl) paraphenylenediamine,

2-methyl-1-N-β-hydroxyethyl paraphenylenediamine,

N- (4-aminophenyl) -3-hydroxypyrrolidine and their acid addition salts.

Among the paraphenylenediamines of the aforementioned formula (I), in particular, paraphenylenediamine,

paratolylenediamine, 2-isopropylparaphenylenediamine,

2-β-hydroxyethyl paraphenylenediamine,

2-β-hydroxyethyloxyparaphenylenediamine,

2,6-dimethylparaphenylenediamine, 2,6-diethylparaphenylenediamine,

2,3-dimethylparaphenylenediamine,

N, N-bis (β-hydroxyethyl) paraphenylenediamine, 2-chloroparaphenylenediamine and their acid addition salts.

(II) According to the invention, the term "double base" refers to compounds containing at least two aromatic rings bearing amino groups and / or hydroxyl groups.

Among the double bases that can be used as oxidation bases in the dye compositions in accordance with the invention, in particular, compounds corresponding to the following formula (II) and their acid addition salts can be cited:

wherein:

Z ₁ and Z ₂ , which may be identical or different, are hydroxyl or a radical —NH ₂ , which may be substituted with a C ₁ -C ₄ alkyl radical or a bridging group Y;

bridge group Y means a linear or branched alkylene chain containing from 1 to 14 carbon atoms, which may be interrupted or which may end with one or more nitrogen-containing groups and / or one or more heteroatoms, such as oxygen, sulfur or nitrogen atoms, and may be substituted by one or more hydroxyls or C ₁ -C ₆ alkoxy radicals;

R ₅ and R ₆ mean a hydrogen or halogen atom, a C ₁ -C ₄ alkyl radical, a monohydroxy (C ₁ -C ₄ ) alkyl radical, a polyhydroxy (C ₂ -C ₄ ) alkyl radical, an amino (C ₁ -C ₄ ) alkyl a radical or a bridging group Y;

R ₇ , R ₈ , R ₉ , R ₁₀ , R ₁₁ and R ₁₂ , which are identical or different, mean a hydrogen atom, a bridging group Y or a C ₁ -C ₄ alkyl radical;

it should be understood that the compounds of formula (II) contain only one bridging group Y per molecule.

Among the nitrogen-containing groups of the formula (II), in particular, an amino group, a mono (C ₁ -C ₄ ) alkylamino group,

(C ₁ -C ₄ ) dialkylamino group, (C ₁ -C ₄ ) trialkylamino group,

monohydroxy (C ₁ -C ₄ ) alkylamino group, imidazolinium radicals and

ammonium

Among the double bases of formula (II), N, N'-bis (β-hydroxyethyl) -N, N'-bis (4'-aminophenyl) -1,3-diaminopropanol can be more specifically cited,

N, N'-bis (β-hydroxyethyl) -N, N'-bis (4'-aminophenyl) ethylenediamine,

N, N'-bis (4-aminophenyl) tetramethylenediamine,

N, N'-bis (β-hydroxyethyl) -N, N'-bis (4-aminophenyl) tetramethylenediamine,

N, N'-bis (4-methylaminophenyl) tetramethylenediamine,

N, N'-bis (ethyl) -N, N'-bis (4'-amino-3'-methylphenyl) ethylenediamine,

1,8-bis (2,5-diaminophenoxy) -3,5-dioxaoctane and their acid addition salts.

Among these double bases of formula (II), N, N'-bis (β-hydroxyethyl) -N, N'-bis (4'-aminophenyl) -1,3-diaminopropanol, 1,8-bis (particularly 2,5-diaminophenoxy) -3,5-dioxaoctane or one of their acid addition salts.

(III) Para-aminophenols corresponding to the following formula (III) and their acid addition salts:

wherein:

R ₁₃ means a hydrogen atom or a halogen atom such as fluorine, C ₁ -C ₄ alkyl, monohydroxy (C ₁ -C ₄ ) alkyl, (C ₁ -C ₄ ) alkoxy (C ₁ -C ₄ ) alkyl, amino (C ₁ -C ₄ ) alkyl or hydroxy (C ₁ -C ₄ ) alkylamino (C ₁ -C ₄ ) alkyl radical.

R ₁₄ means a hydrogen atom or a halogen atom such as fluorine, C ₁ -C ₄ alkyl, monohydroxy (C ₁ -C ₄ ) alkyl, polyhydroxy (C ₂ -C ₄ ) alkyl, amino (C ₁ -C ₄ ) alkyl, cyano (C ₁ -C ₄ ) alkyl or (C ₁ -C ₄ ) alkoxy (C ₁ -C ₄ ) alkyl radical.

Among the paraminophenols of the above formula (III), more specifically, paraaminophenol, 4-amino-3-methylphenol, 4-amino-3-fluorophenol, 4-amino-3-hydroxymethylphenol, 4-amino-2-methylphenol, 4-amino -2-hydroxymethylphenol, 4-amino-2-methoxymethylphenol, 4-amino-2-aminomethylphenol, 4-amino-2- (β-hydroxyethylaminomethyl) phenol and their acid addition salts.

(IV) Orthoaminophenols that can be used as oxidation bases in the context of this invention are selected, in particular, from 2-aminophenol, 2-amino-1-hydroxy-5-methylbenzene, 2-amino-1-hydroxy-6- methylbenzene, 5-acetamido-2-aminophenol and their acid addition salts.

(V) Among the heterocyclic bases which can be used as oxidation bases in the dye compositions of the invention, pyridine derivatives, pyrimidine derivatives, pyrazole derivatives and their acid addition salts can be more specifically described.

Among the pyridine derivatives, compounds specifically described, for example, in GB 1026978 and GB 1153196, such as 2,5-diaminopyridine, 2- (4-methoxyphenyl) amino-3-aminopyridine, 2,3-diamino-6-, can be noted more specifically. methoxypyridine, 2- (β-methoxyethyl) amino-3-amino-6-methoxypyridine, 3,4-diaminopyridine and their acid addition salts.

Among the pyrimidine derivatives, more specifically, compounds described, for example, in patents DE 2359399; JP 88-169571; JP 91-10659 or in publications of international application WO 96/15765, such as 2,4,5,6-tetraaminopyrimidine, 4-hydroxy-2,5,6-triaminopyrimidine, 2-hydroxy-4,5,6-triaminopyrimidine, 2,4-dihydroxy-5,6-diaminopyrimidine, 2,5,6-triaminopyrimidine, and pyrazolopyrimidine derivatives such as those mentioned in patent application FR-A-2750048, and among which pyrazolo [1,5-a] pyrimidine-3,7-diamine;

2,5-dimethylpyrazolo [1,5-a] pyrimidin-3,7-diamine;

pyrazolo [1,5-a] pyrimidine-3,5-diamine;

2,7-dimethylpyrazolo [1,5-a] pyrimidin-3,5-diamine; 3-aminopyrazolo [1,5-a] pyrimidin-7-ol;

3-aminopyrazolo [1,5-a] pyrimidin-5-ol;

2- (3-aminopyrazolo [1,5-a] pyrimidin-7-ylamino) ethanol;

2- (7-aminopyrazolo [1,5-a] pyrimidin-3-ylamino) ethanol;

2 - [(3-aminopyrazolo [1,5-a] pyrimidin-7-yl) - (2-hydroxyethyl) amino] ethanol;

2 - [(7-aminopyrazolo [1,5-a] pyrimidin-3-yl) - (2-hydroxyethyl) amino] ethanol;

5,6-dimethylpyrazolo [1,5-a] pyrimidin-3,7-diamine;

2,6-dimethylpyrazolo [1,5-a] pyrimidin-3,7-diamine;

2,5, N7, N7-tetramethylpyrazolo [1,5-a] pyrimidin-3,7-diamine;

3-amino-5-methyl-7-imidazolylpropylaminopyrazolo [1,5-a] pyrimidine, their addition salts and their tautomeric forms if tautomeric equilibrium exists, and their acid addition salts.

Among the pyrazole derivatives, in particular, the compounds described in the patents DE 3843892, DE 4133957 and in the publications of patent applications WO 94/08969, WO 94/08970, FR-A-2733749 and DE 19543988, such as 4, can be specifically mentioned. 5-diamino-1-methylpyrazole, 3,4-diaminopyrazole,

4,5-diamino-1- (4'-chlorobenzyl) pyrazole,

4,5-diamino-1,3-dimethylpyrazole,

4,5-diamino-3-methyl-1-phenylpyrazole,

4,5-diamino-1-methyl-3-phenylpyrazole,

4-amino-1,3-dimethyl-5-hydrazinopyrazole,

1-benzyl-4,5-diamino-3-methylpyrazole,

4,5-diamino-3-tert-butyl-1-methylpyrazole,

4,5-diamino-1-tert-butyl-3-methylpyrazole,

4,5-diamino-1- (β-hydroxyethyl) -3-methylpyrazole,

4,5-diamino-1- (β-hydroxyethyl) pyrazole,

4,5-diamino-1-ethyl-3-methylpyrazole,

4,5-diamino-1-ethyl-3- (4'-methoxyphenyl) pyrazole,

4,5-diamino-1-ethyl-3-hydroxymethylpyrazole,

4,5-diamino-3-hydroxymethyl-1-methylpyrazole,

4,5-diamino-3-hydroxymethyl-1-isopropylpyrazole,

4,5-diamino-3-methyl-1-isopropylpyrazole,

4-amino-5- (2'-aminoethyl) amino-1,3-dimethylpyrazole,

3,4,5-triaminopyrazole, 1-methyl-3,4,5-triaminopyrazole,

3,5-diamino-1-methyl-4-methylaminopyrazole,

3,5-diamino-4- (β-hydroxyethyl) amino-1-methylpyrazole and their acid addition salts.

According to the invention, the oxidation bases preferably comprise from about 0.0005 to 12% by weight of the total weight of the composition, and even more preferably from about 0.005 to 8% by weight of the specified weight.

Color-forming substances that can be used in the dyeing composition according to the invention are traditionally used in oxidative dyeing compositions, for example, metaminophenols, metaphenylenediamines, metadiphenols, naphthols and heterocyclic color-forming substances, such as, for example, indole derivatives, indoline derivatives, sesamol and its derivatives pyridine derivatives, pyrazolotriazole derivatives, pyrazolones, indazoles, benzimidazoles, benzothiazoles, benzoxazoles, 1,3-benzodioxoles, quinols s and their acid addition salts.

More specifically, said color-forming substances may be selected from 2,4-diamino-1- (β-hydroxyethyloxy) benzene,

2-methyl-5-aminophenol, 5-N- (β-hydroxyethyl) amino-2-methylphenol,

3-aminophenol, 2-chloro-3-amino-6-methylphenol,

1,3-dihydroxybenzene, 1,3-dihydroxy-2-methylbenzene,

4-chloro-1,3-dihydroxybenzene,

2-amino-4- (β-hydroxyethylamino) -1-methoxybenzene,

1,3-diaminobenzene, 1,3-bis (2,4-diaminophenoxy) propane,

sesamol, 1-amino-2-methoxy-4,5-methylenedioxybenzene, α-naphthol,

6-hydroxyindole, 4-hydroxyindole, 4-hydroxy-N-methylindole,

6-hydroxyindoline, 2,6-dihydroxy-4-methylpyridine,

1H-3-methylpyrazol-5-one, 1-phenyl-3-methylpyrazol-5-one,

2-amino-3-hydroxypyridine,

3,6-dimethylpyrazolo [3,2-c] -1,2,4-triazole,

2,6-dimethylpyrazolo [1,5-b] -1,2,4-triazole and their acid addition salts.

If present, said color-forming substances preferably comprise from about 0.0001 to 10% by weight of the total weight of the composition, and even more preferably from about 0.005 to 5% by weight.

Typically, acid addition salts of oxidation bases and color-forming substances are selected, in particular, from hydrochlorides, hydrobromides, sulfates, tartrates, lactates and acetates.

The composition according to the invention may also contain, in addition to the oxidative dyes defined above, direct dyes to enrich the shades with gloss. Said direct dyes can be selected, in particular, from neutral, cationic or anionic nitro, azo or anthraquinone dyes in a proportion by weight of from about 0.001 to 20% and, preferably, from 0.01 to 10% of the total weight of the composition.

Additives

The coloring composition in accordance with the invention may also contain various additives that are traditionally used in hair coloring compositions, such as anionic, cationic, nonionic, amphoteric or zwitterionic surfactants or mixtures thereof, fatty alcohols, fatty acids, anionic, cationic, non-ionic, amphoteric or zwitterionic polymers or mixtures thereof, inorganic or organic thickeners or thickening polymers, such as, for example, non-ionic guar gums, associated polymers containing, at least one hydrophilic structural unit and at least one fatty chain, and nonionic, anionic, cationic or amphoteric natural antioxidants or reducing agents, wetting agents, passivators such as EDTA and ethidronic acid, UV shielding agents, waxes, perfumes, buffers, dispersants, conditioning agents, such as, for example, modified or unmodified, volatile or non-volatile silicones, film-forming agents, pearlescent agents, preservatives, ceramides, pseudo-ceramides, p Substance, mineral or synthetic oils, vitamins or provitamins such as panthenol, opacifying agents and the like.

Preferably, the coloring composition of the invention contains at least one cationic polymer in a ratio of from about 0.05 to 10 wt.% And at least one surfactant, preferably non-ionic, in a ratio of from 0.1 to 20 mass%.

Preferably, it also contains at least one thickening polymer, preferably selected from associated polymers, in a proportion of about 0.05 to 10% by weight.

Reducing agents or antioxidants can be selected, in particular, from sodium sulfite, thioglycolic acid and thiolactic acid and their ammonium salts, sodium bisulfite, dehydroascorbic acid, hydroquinone, 2-methylhydroquinone, tert-butylhydroquinone, homogentizinic acid, and they are usually present in amounts the range of about 0.05 to 3 wt.% relative to the total weight of the composition.

Of course, specialists in this field should be careful in choosing these possible additional compounds so that the beneficial properties inherent in the coloring composition in accordance with the invention do not deteriorate or practically do not deteriorate by the intended additive (s).

According to a first embodiment, the staining method according to the invention comprises the following steps: mixing, during use, a coloring composition as described above and, in particular, containing in a cosmetically acceptable water-based medium at a basic pH, at least one oxidative dye and a combination sodium metasilicate and aqueous ammonia, the amount of ammonia is from 0.4 to 1.3 wt.% relative to the total weight of the coloring composition, with an oxidizing composition; the amount of the oxidizing composition is at most 6 times the mass of the coloring composition; the resulting mixture is applied to keratin fibers, left to act, after which the keratin fibers are rinsed, optionally washed with shampoo and rinsed again, then dried.

According to a specific embodiment of the invention, the mass ratio of the coloring composition / oxidizing composition is in the range between 2/1 and 1/6, and preferably between 1/1 and 1/3.

According to a second embodiment, the staining method according to the invention comprises the following steps: mixing, during use, a coloring composition as described above and, in particular, containing at least one oxidative dye and a combination in a cosmetically acceptable water-based medium at a basic pH sodium metasilicate and aqueous ammonia, the amount of sodium metasilicate is from 1 to 3 wt.% relative to the total weight of the coloring composition, with an oxidizing composition; the amount of oxidizing composition at least corresponds to the weight of the coloring composition; the resulting mixture is applied to keratin fibers, left to act, after which the keratin fibers are rinsed, optionally washed with shampoo and rinsed again, then dried.

According to a particular embodiment of the invention, the mass ratio of the coloring composition / oxidizing composition is in the range between 1/1 and 1/6, and preferably between 1/1 and 1/3.

More specifically, the pH of the composition is in the range of 7.5 to 13.

Furthermore, said mixture is preferably left to act for about 3 to 50 minutes, preferably about 5 to 30 minutes.

Before mixing with the oxidizing agent, the dye composition may be in various forms, such as a liquid, creamy or gel form, possibly under pressure, or in any other form suitable for dyeing keratin fibers and, in particular, hair, after mixing.

Oxidizer

In the oxidizing composition, the oxidizing agent is selected from hydrogen peroxide and compounds capable of releasing hydrogen peroxide in situ, redox enzymes such as laccases, peroxidases and oxidoreductases containing 2 electrons (such as uricase), which are appropriate in the presence of an appropriate donor or cofactor.

In particular, it is preferable to use hydrogen peroxide. The oxidizing agent mainly consists of a hydrogen peroxide solution, the titer of which can vary, more specifically, from about 1 to 40 volumes, and even more preferably from about 5 to 40.

According to a first embodiment of the invention, the ready-to-use composition for oxidatively dyeing human keratin fibers, and more specifically, hair, comprises a mixture of a coloring composition as described above, comprising 0.4-1.3 wt.% Ammonia relative to the total weight of the coloring composition with an oxidizing composition ; the amount of the oxidizing composition is at most 6 times the amount of the coloring composition.

In particular, the mass ratio of the coloring composition / oxidizing composition is in the range between 2/1 and 1/6, and preferably between 1/1 and 1/3.

A second embodiment is a ready-to-use composition for oxidatively dyeing human keratin fibers, and more specifically, hair containing a mixture of the dye composition described above containing 1-3 wt.% Sodium metasilicate relative to the total weight of the dye composition with the oxidizing composition; the amount of the oxidizing composition is at least (corresponding to) the amount of the coloring composition.

In particular, the mass ratio of the coloring composition / oxidizing composition is in the range between 1/1 and 1/6, and preferably between 1/1 and 1/3.

The following examples are intended to illustrate the invention, however, without being restrictive.

Examples 1-3

The following coloring compositions were prepared:

(amount of active substance expressed in grams)

Example 1 Example 2 Example 3 Paraphenylenediamine 0.24 0.24 0.24 Paraaminophenol 0.44 0.44 0.44 2-aminophenol 0,028 0,028 0,028 1,3-dihydroxybenzene 0.192 0.192 0.192 3-aminophenol 0.019 0.019 0.019 5-N (β-hydroxyethyl) amino-2-methylphenol 0,021 0,021 0,021 1,3-dihydroxy-2-methylbenzene 0,055 0,055 0,055 Anhydrous Sodium Metasilicate 2 2 2 Ammonia (aqueous ammonia containing 20.5 wt.% NH ₃ ) 1.23 1.23 1.23 Reducing agent, antioxidant, passivator, perfume How much do you need How much do you need How much do you need Propylene glycol 10 10 10 Anionic polymer; crosslinked polyacrylic acid 0.4 0.4 0.4 Amphoteric polymer; poly-quaternary 22 (C.T.F.A) Merquat 280, CALGON product 1,5 1,5 Cationic polymer: poly-quaternary 6 (C.T.F.A) Merquat 100, a product from MERCK 2,8 Cationic polymer: hexadimetrin chloride (C.T.F.A.) Mexomer PO, CHIMEX product 3 3 Anionic Surfactant: Sodium Lauryl Sulfate Powder 3 Non-ionic surfactant: oxyethylenated lauryl alcohol containing 12 mol of ethylene oxide 7.5 7.5 Non-ionic surfactant: oxyethylenated oleoacetyl alcohol containing 30 mol ethylene oxide four four Non-ionic surfactant: ethoxylated decyl alcohol containing 3 mol of ethylene oxide 10 10 10 Non-ionic surfactant: ethoxylated decyl alcohol containing 5 mol of ethylene oxide 8 Lauric acid 2,5 2,5 Cetyl stearic alcohol 50/50 11.5 11.5 Pearlescent Agent: Hydrophobic Pyrogenic Silica 1,2 1,2 Pearlescent Agent: Glyceryl Monostearate 2 2 Demineralized water as needed one hundred one hundred

During use, each dye composition described above is mixed in a mass to mass ratio with 20 volumes (6% by weight) of a hydrogen peroxide solution.

The resulting mixture is applied for 30 minutes to curls of natural or permanent curled gray hair, which is 90% white. The rinses are then rinsed, washed with standard shampoo, rinsed again and then dried.

It was observed that these mixtures were much less smelling than previously used, with a satisfactory quality of action.

Hair was dyed in an intense shade of golden-blond tone for each of examples 1-3.

Compared to prior art compositions that are identical, except that they did not contain sodium metasilicate and had a higher ammonia content of about 2% as an active substance, the coloring characteristics of compositions 1-3 were maintained.

Claims (30)

1. A coloring composition for the oxidative dyeing of human keratin fibers and more specifically hair, free of an oxidizing agent, containing in a cosmetically acceptable water-based medium at a basic pH, at least one oxidizing dye and an alkalizing agent, characterized in that the alkalizing agent is a combination sodium metasilicate and aqueous ammonia, the amount of ammonia being from 0.1 to 1.6% of the total mass of the coloring composition. 2. The coloring composition according to claim 1, characterized in that the alkalizing agent contains as an active substance at least 0.1%, preferably at least 0.5% and more preferably at least 1% sodium metasilicate of the total weight of the coloring composition. 3. The coloring composition according to claim 1 or 2, characterized in that the alkalizing agent contains at most 6%, preferably at most 5% and more preferably at most 3% sodium metasilicate of the total weight of the coloring composition as an active substance. 4. The coloring composition according to claim 1 or 2, characterized in that the alkalizing agent contains as an active substance from 0.1 to 6% sodium metasilicate of the total weight of the coloring composition. 5. The coloring composition according to claim 4, characterized in that the alkalizing agent contains from 0.5 to 5% sodium metasilicate as the active substance of the total weight of the coloring composition. 6. The coloring composition according to claim 5, characterized in that the alkalizing agent contains from 1 to 3% sodium metasilicate as the active substance of the total weight of the coloring composition. 7. The coloring composition according to claim 1 or 2, characterized in that the alkalizing agent contains as active substance at least 0.1%, more specifically at least 0.4% and preferably at least 0.6% ammonia of the total weight of the coloring composition. 8. The coloring composition according to claim 1 or 2, characterized in that the alkalizing agent contains at most 1.6%, more specifically at most 1.3%, preferably at most 1.2% and more preferably at most 1% ammonia of the total mass of the coloring composition. 9. The coloring composition according to claim 5, characterized in that the alkalizing agent contains as an active substance from 0.4 to 1.3%, preferably from 0.4 to 1.2% ammonia of the total weight of the coloring composition. 10. The coloring composition according to claim 6, characterized in that the alkalizing agent contains as an active substance from 0.6 to 1% ammonia of the total weight of the coloring composition. 11. The coloring composition according to claim 1 or 2, characterized in that its pH is from 7.5 to 13, preferably from 8.5 to 11.5. 12. The coloring composition according to claim 1 or 2, characterized in that the oxidative dye or dyes selected from oxidation bases and color-forming substances. 13. The coloring composition according to p. 12, characterized in that it contains at least one oxidation base. 14. The coloring composition according to item 13, wherein the oxidation base is selected from the group consisting of ortho and paraphenylenediamines, double bases, ortho and paraaminophenols, heterocyclic bases and their acid addition salts. 15. The coloring composition according to item 12, wherein the color-forming substances are selected from the group consisting of metaaminophenols, metaphenylenediamines, metadiphenols, naphthols, indole derivatives, indoline derivatives, sesamol and its derivatives, pyridine derivatives, pyrazolotriazole derivatives, pyrazolones, indazoles benzimidazoles, benzothiazoles, benzoxazoles, 1,3-benzodioxoles, quinolines and their acid addition salts. 16. The coloring composition according to item 12, characterized in that said additive acid salts of oxidation bases and color-forming substances are selected from hydrochlorides, hydrobromides, sulfates, tartrates, lactates and acetates. 17. The ink composition of claim 12, wherein the oxidation base or bases are present in a concentration range from 0.0005 to 12% relative to the total weight of the ink composition. 18. The coloring composition according to item 12, wherein the color-forming substance or color-forming substances are present in the concentration range from 0.0001 to 10% relative to the total weight of the coloring composition. 19. The coloring composition according to claim 1 or 2, characterized in that the cosmetically acceptable medium based on water contains at least one organic solvent. 20. The coloring composition according to claim 19, characterized in that the organic solvent or solvents are present in the range of proportions from 1 to 40% relative to the total weight of the coloring composition. 21. The coloring composition according to claim 1 or 2, characterized in that it contains at least one cationic polymer in a proportion of 0.05 to 10% and at least one non-ionic surfactant in a proportion of 0 , 1 to 20% by weight of the coloring composition. 22. A method for dyeing keratin fibers of a person and in particular hair, characterized in that the dye composition is mixed during use, as described in any of claims 2-6 and 9-21, with an oxidizing composition containing hydrogen peroxide or a compound capable of releasing in situ hydrogen peroxide, or a redox enzyme; the amount of the oxidizing composition is at most 6 times the amount of the coloring composition; the resulting mixture is applied to the fibers, left to act, after which the fibers are rinsed, optionally washed with shampoo and rinsed again, then dried. 23. The method according to item 22, wherein the mass ratio of the dye composition / oxidizing composition is in the range between 2/1 and 1/6, preferably between 1/1 and 1/3. 24. A method of dyeing keratin fibers of a person and in particular hair, characterized in that the dye composition is mixed during use, as described in any one of claims 6-21, with an oxidizing composition containing hydrogen peroxide or a compound capable of releasing hydrogen peroxide in situ or a redox enzyme; the amount of the oxidizing composition at least corresponds to the amount of the coloring composition; the resulting mixture is applied to the fibers, left to act, then rinsed, optionally washed with shampoo and rinsed again, then dried. 25. The method according to paragraph 24, wherein the mass ratio of the dye composition / oxidizing composition is in the range between 1/1 and 1/6, preferably between 1/1 and 1/3. 26. A composition ready for use for oxidative dyeing of human keratin fibers and in particular hair, characterized in that it contains a mixture of a coloring composition as defined in any of claims 2-6 and 9-21 with an oxidizing composition; the amount of the oxidizing composition is at most 6 times the amount of the coloring composition. 27. Ready-to-use composition according to p. 26, characterized in that the mass ratio of the dye composition / oxidizing composition is in the range between 2/1 and 1/6, preferably between 1/1 and 1/3. 28. A composition ready for use for oxidative dyeing of human keratin fibers and in particular hair, characterized in that it contains a mixture of a coloring composition as defined in any one of claims 6-21 with an oxidizing composition; the amount of the oxidizing composition is at least equal to the amount of the coloring composition. 29. Ready-to-use composition according to p. 28, characterized in that the mass ratio of the dye composition / oxidizing composition is in the range between 1/1 and 1/6, preferably between 1/1 and 1/3. 30. Ready-to-use composition according to any one of paragraphs.26-29, characterized in that the oxidizing composition contains hydrogen peroxide.