A dyeing kit

Abstract

A dyeing kit The present invention relates to a dyeing kit comprising: A) a pyrazolidine-3,5-dione compound of formula (1): wherein R1 and R2 are each independently an H, a hydroxyl, a C1-C30 alkyl, unsubstituted or substituted, a C2-C30 alkenyl, unsubstituted or substituted, a cycloalkyl, a heterocyclic group or an alkoxy, such as a C1-C10 alkyl or a halogen-substituted C1-C10 alkyl, preferably a C1-C6 alkyl or a halogen-substituted C1-C6 alkyl, a C3-C10 alkenyl, a C3-C10 cycloalkyl, a C3-C10 heterocyclic alkyl or a C3-C10 epoxy alkyl; and R3 is an H, or an unsubstituted or halogen-substituted C1-C10 alkyl, a C3-C10 cycloalkyl, a C3-C10 heterocyclic alkyl, or a C3-C10 alkoxy, such as a C1-C6 alkyl or a C1-C4 alkyl, preferably an H, in which the halogen is preferably an F, a Cl, or a Br. Figure for the abstract: Fig.1.

Description

Title of the invention: A dyeing kit technical field

[0001] The present invention relates to a dyeing kit for dyeing, in particular for dyeing keratin fibers, in particular human keratin fibers, for example, hair. Context

[0002] Dyes are widely used in various applications and fields, such as printing, paper, textiles, cosmetics, medical sciences, painting, and others. In many situations, rapid dyeing may be desirable. However, in some other situations, slow dyeing may be desirable. In particular, slow dyeing may result in a "reversible" dyeing effect, allowing for the modification or reversal of some undesirable dye.

[0003] For example, many people have long sought to change the color of their hair, and in particular to dye it in order, for example, to cover gray hair. The dyeing product may comprise at least one oxidative dye and at least one oxidant. For best results, the oxidative dye and the oxidant may be placed in a multi-compartment container and mixed together immediately before use.

[0004] Consumers wish to use dyes to color only the target area. However, in many cases, for example, when dyeing hair, other areas may be undesirably dyed (stained), such as the hands, face, ears, and others. Consumers must pay more attention to avoid unwanted areas and have sought products that help them remedy unwanted dyeing. Summary of the invention

[0005] The inventors have now discovered that the use of a specific retarder in a dye composition makes it possible to obtain a composition which can overcome the above disadvantages, in particular by reducing or even substantially avoiding the undesirable formation of stains by dyeing on a non-targeted position.

[0006] An object of the present invention is thus a dyeing kit, comprising:

[0007] A) a pyrazolidine-3,5-dione compound of formula (1): (1)

[0008] wherein Ri and R2 are each independently an H, a hydroxyl, a C1-C30 alkyl, unsubstituted or substituted, a C2-C30 alkenyl, unsubstituted or substituted, a cycloalkyl, an unsaturated heterocyclic group, a heterocyclic group or a epoxyalkyl such as a C1-C10 alkyl or a halogen-substituted C1-C10 alkyl, preferably a C1-C6 alkyl or a halogen-substituted C1-C6 alkyl, a C3-C10 alkenyl, a C3-C10 cycloalkyl, a C3-C10 unsaturated heterocyclic group, a C3-C10 heterocyclic alkyl, or a C3-C10 alkoxy; and R3 is an H, or an unsubstituted or halogen-substituted C1-C10 alkyl, a C3-C10 cycloalkyl, a C3-C10 heterocyclic alkyl, or a C3-C10 alkoxy, such as a C1-C6 alkyl or a C1-C4 alkyl, preferably an H, in which the halogen is preferably an F, a Cl, or a Br; and

[0009] B) a dye composition b).

[0010] Optionally, the pyrazolidine-3,5-dione compound of formula (1) is placed jointly with the dye composition B), or in a separate chamber from the dye composition B).

[0011] The dye composition b) can be any conventional composition useful for dyeing for various applications, such as printing, paper, textiles, cosmetics, medical sciences, painting, and others.

[0012] According to one embodiment of the invention, particularly for cosmetics, for example, for hair dye, the dye composition B) may in turn comprise:

[0013] I) a dye composition I), comprising:

[0014] i) at least one oxidative dye; and

[0015] II) a developer composition II), comprising:

[0016] ii) at least one developer.

[0017] Optionally, the compound pyrazolidine-3,5-dione of formula (1) is placed in composition I).

[0018] The present invention thus provides the use of a pyrazolidine-3,5-dione compound of formula (1), used as a retarder, for slowing down reactions of a dye or intermediates thereof.

[0019] The present invention also provides the use of a pyrazolidine-3,5-dione compound of formula (1) to reduce the tendency of a dye to stain.

[0020] The present invention also provides the use of a composition to reduce the tendency of a dye to stain, wherein the composition comprises a pyrazolidine-3,5-dione compound of formula (1).

[0021] The present invention also relates to a method for dyeing, for example, dyeing keratin fibers, in particular human keratin fibers such as hair, using dye composition B) according to the invention.

[0022] The present invention also relates to a method for reducing the tendency of a dye, for example, a keratin fiber dye, to stain. such as hair, using dye composition B) according to the invention.

[0023] The present invention also relates to a method for slowing down reactions of a dye or intermediates thereof, characterized in mixing a pyrazolidine-3,5-dione compound of formula (1) with the dye. Preferably, the pyrazolidine-3,5-dione compound of formula (1) is mixed with the dye before application of the dye, or the pyrazolidine-3,5-dione compound of formula (1) is applied to the area where the dye was applied for less than 10 minutes, less than 5 minutes, or less than 3 minutes. Description of the drawings

[0024] [Fig-1] Figure [Fig.1] shows the stain resistance performance of the mixtures according to Example 3. Embodiments of the invention

[0025] Throughout the description, including the claims, the term "comprising one" shall be understood as synonymous with "comprising at least one", unless otherwise indicated. Furthermore, the expression "at least one" used in this description is equivalent to the expression "one or more".

[0026] Throughout the description, including the claims, an embodiment defined by "comprising" or otherwise shall be understood as encompassing a preferred embodiment defined by "substantially consisting of" and a preferred embodiment defined by "consisting of".

[0027] Throughout the description, including the claims, the "keratin fiber" according to the present invention is hair, eyelashes, eyebrows, or body hair. Preferably, the keratin fiber according to the present invention is hair.

[0028] In the application, unless specifically stated otherwise, contents, parts and percentages are expressed on a weight basis.

[0029] Throughout the description, including the claims, the term "retarder" means an agent capable of slowing down reactions of a dye or intermediates thereof, such as reactions with a developer, for example, an oxidation reaction between them.

[0030] According to the present invention, "reduction of the tendency to stain" refers to the reduction of stain formation occurring in undesirable areas, such as the hands, face, scalp, ears, rinse water, towels, floor, and others. Preferably, the effect lasts at least 5 minutes after hair dyeing, more particularly 10 minutes, or preferably 15 or 20 minutes.

[0031] An object of the present invention is to provide a dyeing kit, comprising the component of:

[0032] A) a pyrazolidine-3,5-dione compound of formula (1):

[0033] wherein Ri and R2 are each independently an H, a hydroxyl, a C1-C30 alkyl, unsubstituted or substituted, a C2-C30 alkenyl, unsubstituted or substituted, a cycloalkyl, an unsaturated heterocyclic group, a heterocyclic group or an alkoxy, such as a C1-C10 alkyl or a halogen-substituted C1-C10 alkyl, preferably a C1-C6 alkyl or a halogen-substituted C1-C6 alkyl, a C3-C10 alkenyl, a C3-C10 cycloalkyl, a C3-C10 heterocyclic alkyl or a C3-C10 epoxy alkyl; and R3 is an H, or an unsubstituted or halogen-substituted C1-C10 alkyl, a C3-C10 cycloalkyl, an unsaturated C3-C10 heterocyclic group, a C3-C10 heterocyclic alkyl, or a C3-C10 alkoxy, such as a C1-C6 alkyl or a C1-C4 alkyl, preferably an H, in which the halogen is preferably an F, a Cl, or a Br.

[0034] Preferably, the present invention provides a dyeing kit, comprising the components of:

[0035] A) a pyrazolidine-3,5-dione compound of formula (1) according to the present invention; and

[0036] B) a dye composition b).

[0037] Preferably, the present invention provides a dyeing kit, comprising the components of:

[0038] A) a pyrazolidine-3,5-dione compound of formula (1) according to the present invention; and

[0039] B) a dye composition B), comprising:

[0040] I) a dye composition I), comprising the components of:

[0041] i) at least one oxidative dye; and

[0042] II) a developer composition II), comprising the components of:

[0043] ii) at least one oxidant.

[0044] The dyeing kit of the invention is intended to be used in a process for dyeing keratin fibers.

[0045] An object of the invention is thus a process for dyeing keratin fibers, which consists of mixing the dye composition I) with the composition II) of the dye composition B) immediately before use to obtain a dye mixture, optionally by adding a pyrazolidine-3,5-dione compound of formula (1) into the dye mixture, and applying it to the keratin fibers of the dyeing kit of the invention.

[0046] In one embodiment according to the present invention, a compound pyrazolidine-3,5-dione of formula (1) can be added directly into the composition of dye I).

[0047] Other features and advantages of the invention will become clearer upon reading the description and examples that follow.

[0048] Except in operational examples, or if otherwise indicated, all numbers expressing quantities of components and / or reaction conditions shall be understood as being modified in all cases by the term "approximately", having the conventionally known meaning in the art, for example, within 10% of the number indicated (such as "approximately 10%" means 9% - 11% and "approximately 2%" means 1.8% - 2.2%).

[0049] Component A), pyrazolidine-3.5-dione compound of formula (1)

[0050] The dyeing kit according to the present invention comprises a pyrazolidine-3,5-dione compound of formula (1): P (1) "J r Va / rV 7 AO

[0051] wherein Ri and R2 are each independently an H, a hydroxyl, a C1-C30 alkyl, unsubstituted or substituted, a C2-C30 alkenyl, unsubstituted or substituted, a cycloalkyl, an unsaturated heterocyclic group, a heterocyclic group or an alkoxy, such as a C1-C10 alkyl or a halogen-substituted C1-C10 alkyl, preferably a C1-C6 alkyl or a halogen-substituted C1-C6 alkyl, a C3-C10 alkenyl, a C3-C10 cycloalkyl, a C3-C10 heterocyclic alkyl or a C3-C10 epoxy alkyl; and R3 is an H, or an unsubstituted or halogen-substituted C1-C10 alkyl, a C3-C10 cycloalkyl, an unsaturated C3-C10 heterocyclic group, a C3-C10 heterocyclic alkyl, or a C3-C10 alkoxy, such as a C1-C6 alkyl or a C1-C4 alkyl, preferably an H, in which the halogen is preferably an F, a Cl, or a Br.

[0052] According to a preferred embodiment of the present invention, Ri and R2 are each a lower alkyl group, such as a C1-C6 alkyl group, or a C1-C4 alkyl group. For example, Ri and R2 may be the same alkyl group, for example, each being a methyl, ethyl, propyl, or butyl group. According to one embodiment, R3 may be a hydrogen atom. Accordingly, examples of pyrazolidine-3,5-dione compounds of formula (1) may include l,2-dimethyl-pyrazolidine-3,5-dione, l,2-diethyl-pyrazolidine-3,5-dione, l,2-dipropyl-pyrazolidine-3,5-dione, and l,2-dibutyl-pyrazolidine-3,5-dione.

[0053] The pyrazolidine-3,5-dione compound of formula (1) according to the invention is generally present in quantities in the range of 0.001% to 25%, by weight, or 0.0001% to 10% by weight, or preferably 0.005% to 5% by weight, or in particular 0.01% to 3% by weight, or preferably 0.1% to 2% by weight, by weight relative to the total weight of the kit. Dyeing kit including component A)

[0054] The dyeing kit comprising component A) according to the present invention can be useful for dyeing for various applications, such as printing, paper, fabrics, cosmetics, medical sciences, painting, and others.

[0055] According to one embodiment of the invention, the dyeing kit according to the present invention can be used to create an undyed area / pattern or a lighter-colored area / pattern for an article, such as a fabric or paper product, to be dyed. Specifically, component A) of the dyeing kit can be used to coat an area not to be dyed or to create a desired pattern on the article. Then, the dye from the dyeing kit is applied to dye the article. By controlling the time period, a washing step is then applied to the article. As a result, the area coated by component A) is either undyed or only slightly dyed. When component A) is in a light form or has a color identical or substantially similar to the article to be dyed, the dyeing kit may include a washable dye, particularly in cases where artificial dyeing is required.For example, in order to dye a white textile or paper, but leave an area of ​​it also white within a specific pattern—for example, a yellow-dyed textile with a white bird pattern—a person skilled in the art can first mix the washable dye with component A). The resulting mixture is used to draw a bird pattern on the textile, during which the dye guides the user to draw correctly. Then, the washing step described above is carried out.

[0056] According to one embodiment of the invention, the dyeing kit according to the present invention can contain component A) at different concentrations in two or more chambers, in which chamber 1 comprises a first concentration of component A); and chamber 2 comprises a second concentration of component A).

[0057] When the dyeing kit, comprising chambers with different concentrations of component A), is applied, the different concentrations of component A will result in a reaction / dyeing time for the dyes. Then, when the dyed object is rinsed, a color gradient may be formed.

[0058] According to one embodiment of the invention, the dyeing kit according to the present invention may comprise:

[0059] A) a pyrazolidine-3,5-dione compound of formula (1) according to the present invention; And ;

[0060] a specification indicating that the undesirably stained area can be rinsed at a time window after a longer dyeing than the same dye composition except in the absence of component A).

[0061] Preferably, the time window can be less than 10 minutes, less than 5 minutes, or less than 3 minutes.

[0062] It is easy to understand that for the dyeing kit according to the present invention, the specification can be placed jointly with component A) in the same packaging, or can be placed or supplied separately from component A), as long as the combination of component A) and the specification can provide the indication and guide the rinsing of the undesirably dyed area.

[0063] Addition form of the compound pyrazolidine-3.5-dione of formula (1)

[0064] As stated above, the inventor discovered with astonishment that the compound pyrazolidine-3,5-dione of formula (1) can be used as a retarder to slow down reactions of a dye or intermediates thereof, for example, the oxidative dye i) useful in composition I).

[0065] Namely, the pyrazolidine-3,5-dione compound of formula (1) acts primarily on the dye reaction. Consequently, for the dye kit, the pyrazolidine-3,5-dione compound of formula (1) can be added directly to the dye composition B), for example, as a mixture with the dye composition I); or can be added in a separate chamber, for example, as a pyrazolidine-3,5-dione composition comprising the pyrazolidine-3,5-dione compound of formula (1), separate from the dye composition B).

[0066] For use as a pyrazolidine-3,5-dione composition independently of the tincture composition B), the pyrazolidine-3,5-dione composition may include any component known in the field of cosmetics that benefits the stability of the pyrazolidine-3,5-dione compound of formula (1). Dye composition B)

[0067] According to one embodiment of the present invention, a dye composition B) may be included in the dyeing kit of the present invention. The dye composition B) placed in the kit according to the present invention may comprise a dye composition I) and a developer composition II).

[0068] According to one embodiment of the present invention, the colorant composition I) and the developer composition II) can be used in a weight ratio of 1:3 to 3:1, preferably 1:2 to 2:1, or preferably 2:3 to 1:1. Composition of dye I)

[0069] The dye composition B) placed in the kit according to the present invention includes a dye composition I).

[0070] The dye composition I) of the composition B) according to the present invention may include at least one oxidative dye. Oxidative dye

[0071] As previously indicated, the dye composition I) according to the invention comprises one or more oxidative dyes for use as component i).

[0072] The oxidative dyes that can be used in the present invention are generally chosen from oxidation bases, preferably combined with one or more couplers.

[0073] Preferably, the oxidative dye(s) comprises one or more oxidation bases.

[0074] Oxidation bases can be chosen in particular from para-phenylenediamines, bis(phenyl)alkylenediamines, para-aminophenols, ortho-aminophenols, heterocyclic bases, and addition salts thereof, and mixtures thereof.

[0075] Among the para-phenylenediamines, an unsubstituted para-phenylenediamine or a para-phenylenediamine substituted with 1 or 2 alkyl groups at C1-C4 is preferred. Among others, examples that can be mentioned include para-phenylenediamine, 2-chloro-para-phenylenediamine, 2-methyl-para-phenylenediamine, 2,3-dimethyl-para-phenylenediamine, 2,6-dimethyl-para-phenylenediamine, 2,6-diethyl-para-phenylenediamine, and 2,5-dimethyl-para-phenylenediamine. Other para-phenylenediamines can also be used, for example, N,N-dimethyl-para-phenylenediamine, N,N-diethyl-para-phenylenediamine, N,N-dipropyl-para-phenylenediamine, 4-amino-N,N-diethyl-3-methylaniline, N,N-bis([3-hydroxyethyl)-para-phenylenediamine, 4-N,N-bis([3-hydroxyethyl)amino-2-methylaniline, 4-N,N-bis([3-hydroxyethyl)amino-2-chloroaniline, 2-[3-hydroxyethyl-para-phenylenediamine, 2-fluoro-para-phenylenediamine, 2-isopropyl-para-phenylenediamine,N-([3-hydroxypropyl)-para-phenylenediamine, 2-hydroxymethyl-para-phenylenediamine, N,N-dimethyl-3-methyl-para-phenylenediamine, N,N-(ethyl-[3-hydroxyethyl)-para-phenylenediamine, N-([3,Y-dihydroxypropyl)-para-phenylenediamine, N-(4'-aminophenyl)-para-phenylenediamine, N-phenyl-para-phenylenediamine, 2-[3-hydroxyethyloxy-para-phenylenediamine, 2-[3-acetylaminoethyloxy-para-phenylenediamine, N-(|3-methoxyethyl)-para-phenylenediamine, 4-aminophenylpyrrolidine, , 2-thienyl-para-phenylenediamine, 2-[3-hydroxyethylamino-5-aminotoluene and 3-hydroxy-l-(4'-aminophenyl)pyrrolidine, and the addition salts of these with an acid.

[0076] Among the bis(phenyl)alkylenediamines, examples that can be mentioned include N,N'-bis([3-hydroxyethyl)-N,N'-bis(4'-aminophenyl)-1,3-diaminopropanol, N,N'-bis([3-hydroxyethyl)-N,N'-bis(4'-aminophenyl)ethylenediamine, N,N'-bis(4-aminophenyl)tetramethylenediamine, N,N'-bis(P-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)-3,6-dioxaoctane and the addition salts thereof.

[0077] Among the para-aminophenols, an unsubstituted para-aminophenol or a para-aminophenol substituted with 1 or 2 alkyl groups at C1-C4 is preferred. Examples that may be mentioned include para-aminophenol, 4-amino-3-methylphenol, and 4-amino-2-methylphenol. Other para-phenylenediamines may also be used, for example, 4-amino-3-fluorophenol, 4-amino-3-chlorophenol, 4-amino-3-hydroxymethylphenol, 4-amino-2-hydroxymethylphenol, 4-amino-2-methoxymethylphenol, 4-amino-2-aminomethylphenol, 4-amino-2-([3-hydroxyethyl-aminomethyl)phenol, and 4-amino-2-fluorophenol, and their addition salts with an acid.

[0078] Among the ortho-aminophenols, examples that can be mentioned include 2-aminophenol, 2-amino-5-methylphenol, 2-amino-6-methylphenol and 5-acetamido-2-aminophenol, and the addition salts of these.

[0079] Among heterocyclic bases, examples that can be mentioned include pyridine derivatives, pyrimidine derivatives and pyrazole derivatives.

[0080] Among the pyridine derivatives that can be mentioned are the compounds described, for example, in patents GB 1 026 978 and GB 1 153 196, for example 2,5-diaminopyridine, 2-(4-methoxyphenyl)amino-3-aminopyridine and 3,4-diaminopyridine, and the addition salts of these.

[0081] Other pyridine oxidation bases that are useful in the present invention are the 3-aminopyrazolo[l,5-a]pyridine oxidation bases or their addition salts described, for example, in French patent application FR 2 801 308. Examples that may be mentioned include pyrazolo[l,5-a]pyrid-3-ylamine, 2-(acetylamino)pyrazolo[l,5-a]pyrid-3-ylamine, 2-(morpholin-4-yl)pyrazolo[l,5-a]pyrid-3-ylamine, 3-aminopyrazolo[l,5-a]pyridine-2-carboxylic acid, 2-methoxypyrazolo[l,5-a]pyrid-3-ylamine, (3-aminopyrazolo[l,5-a]pyrid-7-yl)methanol, 2-(3-aminopyrazolo[l,5-a]pyrid-5-yl)ethanol, 2-(3-aminopyrazolo[l,5-a]pyrid-7-yl)ethanol, (3-aminopyrazolo[l,5-a]pyrid-2-yl)methanol, 3,6-diaminopyrazolo[l,5-a]pyridine, 3,4-diaminopyrazolo[l,5-a]pyridine, pyrazolo[l,5-a]pyridine-3,7-diamine, 7-(morpholin-4-yl)pyrazolo[l,5-a]pyrid-3-ylamine, pyrazolo[l,5-a]pyridine-3,5-diamine, 5-(morpholin-4-yl)pyrazolo[l,5-a]pyrid-3-ylamine, 2-[(3-aminopyrazolo[l,5-a]pyrid-5-yl)(2-hydroxyethyl)amino]ethanol, 2-[(3-aminopyrazolo[l,5-a]pyrid-7-yl)(2-hydroxyethyl)amino]ethanol, 3-aminopyrazolo[l,5-a]pyridin-5-ol, 3-aminopyrazolo[l,5-a]pyridin-4-ol, 3-aminopyrazolo[l,5-a]pyridin-6-ol, 3-aminopyrazolo[l,5-a]pyridin-7-ol and their addition salts.

[0082] Among the pyrimidine derivatives that may be mentioned are the compounds described, for example, in patents DE 2359399; JP 88-169571; JP 05-63124; EP 0770375 or patent application WO 96 / 15765, such as 2,4,5,6-tetraaminopyrimidine, 4-hydroxy-2,5,6-triaminopyrimidine, 2-hydroxy-4,5,6-triaminopyrimidine, 2,4-dihydroxy-5,6-diaminopyrimidine, 2,5,6-triaminopyrimidine and the addition salts thereof and the tautomeric forms thereof, where a tautomeric equilibrium exists.

[0083] Among the pyrazole derivatives that may be mentioned are the compounds described in patents DE 3843892 and DE 4133957 and patent applications WO 94 / 08969, WO 94 / 08970, FR-A-2 733 749 and DE 195 43 988, for example 4,5-diaminopyrazole, 4,5-diamino-l-methylpyrazole, 4,5-diamino-l-([3-hydroxyethyl)pyrazole, 3,4-diaminopyrazole, 4,5-diamino-l-(4'-chlorobenzyl)pyrazole, 4,5-diamino-l,3-dimethylpyrazole, 4,5-diamino-3-methyl-l-phenylpyrazole, the 4,5-diamino-l-methyl-3-phenylpyrazole, 4-amino-1,3-dimethyl-5-hydrazinopyrazole, l-benzyl-4,5-diamino-3-methylpyrazole, 4,5-diamino-3-tert-butyl-l-methylpyrazole, 4,5-diamino-l-tert-butyl-3-methylpyrazole, 4,5-diamino-l-([3-hydroxyethyl)-3-methylpyrazole, 4,5-diamino-l-ethyl-3-methylpyrazole, 4,5-diamino-l-ethyl-3-(4'-methoxyphenyl)pyrazole, 4,5-diamino-l-ethyl-3-hydroxymethylpyrazole, 4,5-diamino-3-hydroxymethyl-l-methylpyrazole, 4,5-diamino-3-hydroxymethyl-l-isopropylpyrazole,4,5-Diamino-3-methyl-1-isopropylpyrazole, 4-amino-5-(2'-aminoethyl)amino-1,3-dimethylpyrazole, 3,4,5-triaminopyrazole, , l-methyl-3,4,5-triaminopyrazole, 3,5-diamino-l-methyl-4-methylaminopyrazole and 3,5-diamino-4-([3-hydroxyethyl)amino-l-methylpyrazole, and their addition salts. 4,5-diamino-l-([3-methoxyethyl)pyrazole may also be used.

[0084] Preferably 4,5-diaminopyrazoles will be used, for example, C1-C4 4,5-diamino-l-hydroxy alkylpyrazole, and even more preferably 4,5-diamino-l-([3-hydroxyethyl)pyrazole and / or a salt thereof, in particular a sulfate thereof.

[0085] The oxidative dye(s) may also include one or more couplers, which may be chosen from those conventionally used for dyeing keratin fibers.

[0086] Among these couplers, particular mention may be made of meta-phenylenediamines, meta-aminophenols, meta-diphenols, naphthalene-based couplers, heterocyclic couplers, and also their addition salts and mixtures thereof. In particular, unsubstituted meta-aminophenol or meta-aminophenol substituted with 1 or 2 C1-C4 alkyls, unsubstituted meta-diphenol or meta-diphenol substituted with 1 or 2 C1-C4 alkyls, diaminophenols, or unsubstituted hydroxyindoles, an amino-substituted hydroxypyridine, or hydroxybenzomorpholine may preferably be used.

[0087] Examples that can be mentioned include l-hydroxy-3-aminobenzene, l-methyl-2-hydroxy-4-aminobenzene, 1,3-dihydroxybenzene, l,3-dihydroxy-2-methylbenzene, 5-amino-6-chloro-o-methylphenol, 2-methyl-5-hydroxyethylaminophenol, 4-chloro-1,3-dihydroxybenzene, 2,4-diamino-l-([3-hydroxyethyloxy)benzene, 2-amino-4-([3-hydroxyethylamino)-l-methoxybenzene, 1,3-diaminobenzene, l,3-bis(2,4-diaminophenoxy)propane, 3-ureidoaniline, 3-ureido-l-dimethylaminobenzene, sesamol, l-[3-hydroxyethylamino-3,4-methylenedioxybenzene, α-naphthol, the 2-methyl-l-naphthol, 6-hydroxyindole, 4-hydroxyindole, 4-hydroxy-N-methylindole, 2-amino-3-hydroxypyridine, 6-hydroxybenzomorpholine, 3,5-diamino-2,6-dimethoxypyridine, lN-([3-hydroxyethyl)amino-3,4-methylenedioxybenzene, 2,6-bis([3-hydroxyethylamino)toluene, 6-hydroxyindoline, 2,6-dihydroxy-4-methylpyridine, lH-3-methylpyrazol-5-one, l-phenyl-3-methylpyrazol-5-one,2,6-Dimethylpyrazolo[l,5-b]-l,2,4-triazole, 2,6-dimethyl[3,2-c]-l,2,4-triazole and 6-methylpyrazolo[l,5-a]benzimidazole, their addition salts with an acid, and mixtures thereof, such as the hydrochloride or dihydrochloride of these, for example, l-beta-hydroxyethyloxy-2,4-diaminobenzene dihydrochloride (2,4-diaminophenoxyethanol HCl).

[0088] In general, the addition salts of the oxidation bases and couplers that can be used in the context of the invention are particularly chosen from among the addition salts with an acid such as hydrochlorides, hydrobromides, sulfates, citrates, succinates, tartrates, lactates, tosylates, benzenesulfonates, phosphates and acetates.

[0089] In a first embodiment given by way of example for the oxidation base, the examples include unsubstituted para-phenylenediamine or para-phenylenediamine substituted by 1 or 2 alkyls in C1-C4.

[0090] In a second embodiment given by way of example for the oxidation base, the examples include an unsubstituted para-aminophenol or a para-aminophenol substituted by 1 or 2 alkyls in C1-C4, in particular an unsubstituted para-aminophenol.

[0091] In a third embodiment given by way of example for the oxidation base, examples including 4,5-diaminopyrazoles will preferably be used, for example, C1-C4 4,5-diamino-l-hydroxy alkylpyrazole, or a salt thereof.

[0092] For the oxidation base, unsubstituted para-aminophenol or a para-aminophenol substituted by 1 or 2 alkyls in C1-C4 is particularly mentioned.

[0093] In particular, for the coupler, unsubstituted meta-aminophenol or a meta-aminophenol substituted by 1 or 2 C1-C4 alkyls, unsubstituted meta-diphenol or a meta-diphenol substituted by 1 or 2 C1-C4 alkyls, diaminophenols, or unsubstituted hydroxyindoles, an amino-substituted hydroxypyridine, or hydroxybenzomorpholine may preferably be used.

[0094] When an unsubstituted hydroxyindole, an amino-substituted hydroxypyridine, or a hydroxybenzomorpholine is used as a coupler, it is preferably used in combination with the oxidation base according to the second embodiment given by way of example.

[0095] When an oxidation base according to the third embodiment given by way of example for the oxidation base is used, it is preferably used in combination with an amino-substituted hydroxypyridine as a coupler.

[0096] In addition, the combination of 2-amino-3-hydroxypyridine as a coupler with the oxidation base according to the second embodiment given by way of example, or the combination of 5-amino-6-chloro-o-methylphenol as a coupler with the oxidation base according to the second embodiment given by way of example, may be individually mentioned.

[0097] Among others, the combination of 4,5-diamino-l-([3-hydroxyethyl)pyrazole sulfate as an oxidation base with 2-amino-3-hydroxypyridine as a coupler, is particularly mentioned.

[0098] The oxidation base(s) may advantageously represent from 0.0001% to 20% by weight, preferably from 0.01% to 10% by weight and even more preferably from 0.1% to 5% by weight, relative to the total weight of composition I).

[0099] The coupler(s), if present, may advantageously represent from 0.0001% to 20% by weight, and preferably from 0.001% to 10% by weight, or from 0.01% to 5% by weight, relative to the total weight of composition I). Antioxidant

[0100] The colorant composition I) may optionally include an antioxidant.

[0101] The antioxidants used may include natural exogenous phytochemical antioxidants such as phenols and carotenoids.

[0102] The antioxidant may include flavonoids. Flavonoids constitute an important class of over 5,000 polyphenolic phytochemicals with antioxidant properties that act by directly scavenging free radicals. Flavonoids have anti-inflammatory, antibacterial, antiviral, anti-allergic, anti-mutagenic, anti-thrombotic, anti-tumor, and vasodilatory effects, and these modes of action can also be used to prevent, mitigate, or eliminate oxidative damage to dental instruments. Flavonoids also exhibit chelating properties with metal ions and can mitigate oxidative damage to metal ions by chelating ions. The formation and stability of the flavonoid-metal chelate depend on the function of the structure.Flavonoids with a catechol group and a hydrogen bond between the hydroxyl groups at positions 5 and 3 have chelating properties.

[0103] Vitamin C and its derivatives may be used, including ascorbic acid, erythorbic acid, or derivatives thereof, for example, sodium ascorbate / erythorbate and fat-soluble tetrahexyl decyl ester ascorbate / erythorbate, ascorbyl palmitate, magnesium ascorbyl phosphate, ascorbyl glucoside, glucosamine ascorbate, ascorbyl acetate, and others. In addition, it is also possible to use plants containing a high amount of vitamin C, such as extracts of Myrciaria dubia, acerola, Emblica officinalis, and bioflavonoids from rose and citrus fruits, including water-soluble bioflavonoids such as hesperidin methyl chalcone.

[0104] Sesamum indicum or a lignan may also be added. Sesame and its lignans (fibrous compounds associated with sesame) act as antioxidants. Sesame seed lignan significantly increases the activity of vitamin E.

[0105] Other antioxidants that can be incorporated into the compositions of the present invention include tocopherols (e.g., d-alpha-tocopherol, d-beta-tocopherol, d-gamma-tocopherol, d-delta-tocopherol), tocotrienol phenol (e.g., da-tocotrienol, d-[3-tocotrienol, dy-tocotrienol, d-δ-tocotrienol) and vitamin E (α-Tocopheryl acetate). These compounds can be isolated from natural sources, prepared synthetically, or blended. A tocotrienol-rich vitamin E preparation can be obtained by fractionating the vitamin E preparation to remove a portion of the biophenol and recover the more concentrated tocotrienol product. Useful tocotrienols are natural products isolated, for example, from wheat germ oil, cereal oil, or palm oil using high-performance liquid chromatography, or from barley, distillers' grains, or oats by alcohol extraction and / or molecular distillation. The term "tocotrienol" as used here includes a tocotrienol-rich fraction obtained from these natural products as well as a pure compound. Increased glutathione peroxidase activity protects the skin from oxidative damage.

[0106] Furthermore, carotenoids, particularly of the lutein type, are also useful antioxidants that can be utilized. Lutein-type carotenoids include molecules such as lutein, canthaxanthin, cryptoxanthin, zeaxanthin, and astaxanthin. Lutein compounds protect compounds such as vitamin A, vitamin E, and other carotenoids.

[0107] The flavonoid may be a flavanone (a derivative of 2,3-dihydro-2-phenylbenzopyran-4-one). Flavanones include: scutellarin, eriodictin, hesperetin, hesperidin, sylvestre, isosakuranetin, na-ringenin, naringin, pinocine, tangrin (poncirin), sakuranetin, sakura glycosides and 7-O-methyl ergophenol (Sterubine).

[0108] The flavonoid may be a dihydroflavonol (a derivative of 3-hydroxy-2,3-dihydro-2-phenylbenzopyran-4-one). Flavanols include: taxifolin, aromadrin, chrysandroside A, chrysandroside B, xeractinol, astilbine, and flavonol.

[0109] The flavonoid may be a flavonoid (a derivative of 2-phenylbenzopyran-4-one). Flavonoids include: Apigenin, luteolin, tangeritin, chrysin, baicalein, wild-type baicalein, wogonin, synthetic flavonoids: diosmin and a flavonoid ester.

[0110] The flavonoid may be a flavonol (a derivative of 3-hydroxy-2-phenylbenzopyran-4-one). Flavonols include: 3-hydroxyflavone, rhodoxanthin, quercetin, galangin, cotton dermatan, kaempferol, isorhamnetin, blackberry pigment, myricetin, naringin (Natsudaïdaïne), muskyl flavonol (Pachypodol), quercetin, methyl rhamnosine, rhamnetin, azalein, hyperoside, isoquercetin, myricetin, Swedish glycosides, robin, rutin, Spiraea, xanthorhamnine, amurensine, icariine, and tracuridine.

[0111] The flavonoid may be a flavan-3-ol (a derivative of 2-phenyl-3,4-dihydro-2H-benzopyran-3-ol). Flavan-3-ol includes: catechin, epicatechin, epigallocatechin, epicatechin gallate, epigallocatechin gallate, epiafzelechin, fisetinidol, guibourtinidol, mesquitol, and Robinetinidol.

[0112] The flavonoid may be a flavan-4-ol (a derivative of 2-phenylchroman-4-ol). Flavan-4-ols include: Apiforol and Luteoforol.

[0113] The flavonoid may be an isoflavone (a derivative of 3-phenylbenzopyran-4-one). Isoflavones include: genistein, daidzein, garbanin A, formononetin, and daidzein equol metabolites.

[0114] The antioxidant may be anthocyanin (a cation derivative of 2-phenylbenzopyranoside). Anthocyanins include: Aurantinidin, cyanidin, delphinidin, Europinidin, Luteolinidin, Pelargonidin, Malvidin, Peonyidin (peonidin), morning glory pigment (petunidin), rose pigment (rosinidin), and xanthone.

[0115] The antioxidant may be dihydrochalcone (a derivative of 1,3-diphenyl-l-propanone). Dihydrochalcone includes: phloretin, dihydrochalcone phloridine cisplatin, aspalathine, naringin dihydrochalcone, neohesperidin dihydrochalcone, and nothofagin. The mode of action of the present invention is not limited, but dihydrochalcone may exert an antioxidant effect by reducing reactive radicals such as reactive oxygen and nitrogen species.

[0116] The antioxidant may be an anthocyanin. Anthocyanins and their derivatives are antioxidants. Anthocyanins comprise a class of flavonoid compounds responsible for the red, purple, and blue colors of many fruits, vegetables, grains, and flowers, which are naturally water-soluble compounds. In addition, anthocyanins are collagenase inhibitors. Inhibition of collagenase helps prevent and reduce wrinkles caused by the reduction of skin collagen, increase skin elasticity, and so on. Anthocyanins can be obtained from any part of a variety of plant sources, such as solids, flowers, stems, leaves, roots, bark, or seeds. Those skilled in the art will appreciate that certain portions of the plant may contain higher natural levels of anthocyanins, and thus these groups are used to obtain the desired anthocyanins.In some cases, the antioxidant may include one or more betaines. Betatine, similar to anthocyanins, is available from natural sources and is an antioxidant.

[0117] The antioxidant may be a phenylpropanoid (a derivative of cinnamic acid). Phenylpropanoids include: cinnamic acid, caffeic acid, ferulic acid, trans-ferulic acid (including its pharmacore antioxidant 2,6-dihydroxyacetophenomenon), 5-hydroxyferric acid, sinapic acid, coumarin, coni- alcohol feryl alcohol, sinapyl alcohol, eugenol, chavicol, baicalein, p-coumaric acid, and sinapinic acid. Without limiting the mode of action of the present invention, phenylpropanoids can neutralize free radicals.

[0118] The antioxidant may be chalcone (a derivative of 1,3-diphenyl-2-propen-1-one). Chalcone includes: zirconia, okanine, safflower, marein, sophoradine, xanthohumol, flavokvain A, flavokvain B, flavokvain C and synthetic safalcone.

[0119] The antioxidant may be a curcuminoid. Curcuminoids include: curcumin, demethoxycurcumin, bis-demethoxycurcumin, and tetrahydrocurcumin. Curcumin and tetrahydrocurcumin may be derived from the turmeric rhizome. Tetrahydrocurcumin, a metabolite of curcumin, has been shown to be a more potent and stable antioxidant than curcumin.

[0120] The antioxidant may be a tannin. Tannins include: tannins, Terflavin B, Glucogallin, gallic acid and quercitannic acid.

[0121] The antioxidant may be a stilbenoid. Stilbenoids include: resveratrol, red sandalwood, and paclitaxel. Resveratrol may include, but is not limited to, 3,5,4'-trihydroxyindole, 3,4,3',5'-tetrahydroxyindole (cetotriol), 2,3',4,5'-tetrahydroxyindole (oxidized resveratrol), 4,4'-dihydroxyindole, and its alpha and beta glucoside, galactoside, and mannoside derivatives.

[0122] The antioxidant may be a coumarin (a derivative of 2H-benzopyran-2-one). Coumarins include: 4-hydroxycoumarin, umbelliferone, aesculetin, herniarin, aurapten, and dicoumarin.

[0123] The antioxidant may be a carotenoid. Carotenoids include: beta-carotene, alpha-carotene, gamma-carotene, beta-cryptoxanthin, lycopene, lutein and idebenone.

[0124] The antioxidant may be a vitamin or a derivative thereof. Vitamins include: retinol, ascorbic acid or erythorbic acid, L-ascorbic acid, tocopherol, tocotrienol and a vitamin cofactor: coenzyme Q10.

[0125] The antioxidant may be: xanthone, butylated hydroxytoluene, 2,6-di-tert-butylphenol, 2,4-dimethyl-6-tert-butylphenol, gallic acid, eugenol, uric acid, alpha-lipoic acid, ellagic acid, cichoric acid, chlorogenic acid, rosmarinic acid, salicylic acid, acetylcysteine, S-allylcysteine, pyridone (Barbigerone), chebulagic acid, edaravone, ethoxyquin, glutathione, hydroxytyrosol, idebenone, melatonin, N-acetylserotonin, nordihydroguaiaretic acid, oleotanthal, oleuropein, Paradol, paclitaxel, probucol, propyl gallate, protocatechuic acid, pyrithione, rutin, linseed lignan diglucoside, sesamin, sesame phenol, silybin, silymarin, theaflavins, theaflavin digallate, thymoquinone, Trolox, tyrosol, polyunsaturated fatty acids and sulfur-based antioxidants such as methionine or lipoic acid. Reducer

[0126] The colorant composition I) may include a reducer for use as an antioxidant.

[0127] According to the present invention, the useful reducing agents may include sodium thiosulfate, sodium metabisulfite, ammonium thiourea sulfite, thioglycolic acid (TGA), thiolactic acid, ammonium thiolactate, monocarbothioic acid diglycidylic ester, carbothioic ammonium acetate, thioglycerol, dithioglycolic acid, carbothioic diammonium strontium acetate, thio glycolate, carbothioic isooctyl, cysteine, cysteamine, homocysteine, glutathione peptide, thiomalic acid, 2-mercaptopropionic acid, 3-mercaptopropionic acid, thiodiglycol, 2-mercaptoethanol, dithiothreitol, thioxanthine, thiosalicylic acid, thiopropionic acid, lipoic acid, N-acetylcysteine ​​and its salts; ammonium thioglycolate, glycerol monothioglycolate, or a mixture of these.

[0128] Examples of preferred reducing agents that may be mentioned include thioglycolic acid, dithioglycolic acid, thiolactic acid, thiomalic acid, salts thereof, or a mixture thereof.

[0129] The antioxidant, including the reducer, described above is preferably used according to the invention in an amount that may be in the range of 0.001 to 10% by weight, preferably 0.1 to 7% by weight, or preferably 0.5 to 5% by weight, relative to the total weight of the colorant composition I). Surfactant

[0130] The colorant composition I) according to the invention may comprise one or more surfactant(s), for example, in particular an anionic surfactant and / or a non-ionic surfactant. Anionic surfactant

[0131] The colorant composition I) according to the invention may further comprise one or more anionic surfactant(s).

[0132] The term "anionic surfactant" means a surfactant comprising, as ionic or ionizable groups, only anionic groups. These anionic groups are preferably selected from the following groups:

[0133] -COOH, -COO , -SO3H, -SO3, -OSO3H, -OSO3, -PO2H2, -PO2H, -PO22, -P(OH)2, =P(O)OH, -P(OH)O , =P(O)O , =POH, =PO , the anionic parts comprising a cationic counter-ion such as an alkali metal, an alkaline earth metal or an ammonium.

[0134] As examples of anionic surfactants that can be used in the composition of colorant I) according to the invention, mention may be made of alkyl sulfates, alkyl ether sulfates, alkylamido ether sulfates, alkyl polyether sulfates, monoglyceride sulfates, alkylsulfonates, alkylamide sulfonates, alkylarylsulfonates, α-olefin sulfonates, paraffin sulfonates, alkyl sulfosuccinates, alkyl ether sulfosuccinates, alkylamide sulfosuccinates, alkyl sulfoacetates, acylsarcosinates, acylglutamates, alkyl sulfosuccinamates, acylisethionates and N-acyltaurates, polyglycoside polycarboxylic acid and alkyl monoester salts, acyl lactylates, uronic acid D-galactoside salts, alkyl ether carboxylic acid salts, alkylaryl ether carboxylic acid salts, alkylamido ether carboxylic acid salts,and the corresponding non-salted forms of all these compounds; the alkyl and acyl groups of all these compounds comprising from 6 to 40 carbon atoms, and the aryl group denoting a phenyl group.

[0135] These compounds can be oxyethylated and then preferably comprise from 1 to 50 ethylene oxide motifs.

[0136] C6-C24 alkyl monoester salts of polyglycoside-polycarboxylic acids can be selected from C6-C24 alkyl polyglycoside-citrates, C6-C24 alkyl polyglycoside-tartrates and C6-C24 alkyl polyglycoside-sulfosuccinates.

[0137] When the anionic surfactant(s) is / are in salt form, it / they may be chosen from alkali metal salts such as sodium or potassium salt and preferably sodium salt, ammonium salts, amine salts and in particular amino alcohol salts, or alkaline earth metal salts such as magnesium salts.

[0138] Examples of amino alcohol salts that may be particularly mentioned include monoethanolamine, diethanolamine and triethanolamine salts, monoisopropanolamine, diisopropanolamine or triisopropanolamine salts, 2-amino-2-methyl-l-propanol salts, 2-amino-2-methyl-l,3-propanediol salts and tris(hydroxymethyl)aminomethane salts.

[0139] Salts of alkali metal or alkaline-earth metal, and in particular salts of sodium or magnesium, are preferably used.

[0140] Preferred anionic surfactants are selected from alkyl sulfates (in C6-C30), alkyl ether sulfates (in C6-C30), alkylamido ether sulfates (in C6-C30), alkylaryl polyether sulfates and monoglyceride sulfates, all these compounds optionally comprising from 1 to 20 ethylene oxide motifs; or preferably alkyl sulfates (in C12-C20) and alkyl ether sulfates (in C12-C20) comprising 2 to 20 ethylene oxide units, for example, 1 to 4 ethylene oxide units, particularly in the form of alkali metal, ammonium, amino alcohol, and alkaline earth metal salts, or a mixture of these compounds. Even more preferably, it is preferable to use a polyoxyethylenated sodium lauryl ether sulfate, such as a sodium lauryl ether sulfate containing 2 or 2.2 mol of ethylene oxide.

[0141] Preferably, the anionic surfactants of the invention are sulfates, more specifically are selected from alkyl (C6-C30) sulfates, alkyl ether (C6-C30) ether sulfates, alkylamido (C6-C30) ether sulfates, alkylaryl polyether sulfates and monoglyceride sulfates, their salts such as alkali salts, such as sodium salts, and mixtures thereof.

[0142] Or preferably the anionic surfactants of the invention are chosen from alkyl sulfates (in C6-C30), alkyl ether sulfates (in C6-C30), in particular alkyl ether sulfates (in C6-C30) such as lauryl ether sulfate, their salts, such as sodium laureth sulfate.

[0143] The quantity of said anionic surfactant(s) in the colorant composition I) according to the invention is from 0.01 to 20% by weight, preferably from 0.1 to 10% by weight, or preferably from 0.1 to 8% by weight, relative to the total weight of composition I). Nonionic surfactant

[0144] The colorant composition I) according to the invention may further contain one or more non-ionic surfactant(s).

[0145] The non-ionic surfactant(s) which may be used in the compositions are described, for example, in the Handbook of Surfactants by MR Porter, published by Blackie & Son (Glasgow and London), 1991, pages 116-178.

[0146] Examples of nonionic surfactants that may be mentioned include the following nonionic surfactants:

[0147] - oxyalkylenated (C8-C24) alkylphenols;

[0148] - C8-C30 oxyalkylated fatty acid amides, saturated or unsaturated, linear or branched;

[0149] - oxyethylenated fatty alcohols, saturated or unsaturated, linear or branched, in C8 to C40, in particularly in C8-C2O and even more preferably in CiO-Ci8 comprising from 1 to 100 mol of ethylene oxide, preferably from 2 to 50, more particularly from 2 to 40 mol, or even from 3 to 20 mol of ethylene oxide;

[0150] - esters of C8-C30 acids, saturated or unsaturated, linear or branched, and of poly ethylene glycols;

[0151] - esters of C8-C30 acids, saturated or unsaturated, linear or branched, and of sorbitol, preferably oxygenated;

[0152] - sucrose fatty acid esters;

[0153] - alkyl(poly)glucosides (C8-C30), alkenyl(poly)glucosides (C8-C30), which are op- technically oxyalkylened (0 to 10 oxyalkylene motifs) and comprising 1 to 15 glucose motifs, alkyl (poly)glucoside esters (in C8-C30);

[0154] - oxyethylenated vegetable oils, saturated or unsaturated;

[0155] - ethylene oxide and / or propylene oxide condensates, among others, alone or in the form of mixtures;

[0156] - derivatives of N-alkylglucamine (in C8-C30) and N-acylmethylglucamine (in C8-C30);

[0157] - aldobionamides;

[0158] - amine oxides;

[0159] - oxyethylenated and / or oxypropylenated silicones;

[0160] - and mixtures thereof.

[0161] The terms "oxyalkylated", "oxyethylated", "oxypropylated" and "glycerolated" cover, respectively, mono- or poly-oxyalkylated, oxyethylated, oxypropylated and glycerolated compounds, unless specifically stated otherwise.

[0162] The oxyalkylene motifs are more particularly oxyethylenated or oxy-propylene motifs, or a combination thereof, preferably oxyethylenated motifs.

[0163] The number of moles of ethylene oxide and / or propylene oxide is preferably in a range of 1 to 250, more particularly from 2 to 100 and even more preferably from 2 to 50; the number of moles of glycerol is particularly in a range of 1 to 50 and even more preferably from 1 to 10.

[0164] Advantageously, the non-ionic surfactants according to the invention do not include oxypropylene motifs.

[0165] Examples may include, in particular, lauryl alcohol containing 4 mol of ethylene oxide (INCI name: Laureth-4) and lauryl alcohol containing 12 mol of ethylene oxide (INCI name: Laureth-12). Other examples may include OLETH-10, OLETH-30, DECETH-3, DECETH-5, and others.

[0166] As examples of nonionic glycerolated surfactants, use is preferably made of monoglycerolated or polyglycerolated alcohols in the C8-C40 range, comprising from 1 to 50 mol of glycerol and preferably from 1 to 10 mol of glycerol.

[0167] Examples of compounds of this type may be mentioned: lauryl alcohol containing 4 mol of glycerol (INCI name: Polyglyceryl-4 Lauryl Ether), lauryl alcohol containing 1.5 mol of glycerol, oleyl alcohol containing 4 mol of glycerol (INCI name: Polyglyceryl-4 Oleyl Ether), oleyl alcohol containing 2 mol of glycerol (INCI name: Polyglyceryl-2 Oleyl Ether), cetearyl alcohol containing 2 mol of glycerol, cetearyl alcohol containing 6 mol of glycerol, oleyl / cetyl alcohol containing 6 mol of glycerol, and octadecanol containing 6 mol of glycerol.

[0168] Among glycerol alcohols, it is particularly preferable to use the C8 / C10 alcohol containing 1 mol of glycerol, the C10 / C12 alcohol containing 1 mol of glycerol and C12 alcohol containing 1.5 mol of glycerol.

[0169] The non-ionic surfactant(s), when present in the colorant composition I) according to the invention, are preferably present in a total quantity in the range of 0.01 to 1% by weight, relative to the total weight of the composition. Solvent

[0170] The colorant composition I) according to the invention may advantageously comprise one or more solvent(s), for example, water and / or an organic solvent. Water

[0171] The colorant composition I) according to the invention advantageously comprises water, in a content less than or equal to 40% by weight relative to the total weight of composition I).

[0172] The water content in the colorant composition I) according to the invention is preferably in a range of 10% to 40% by weight, more preferably 15% to 35% by weight, or 20% to 30% by weight, relative to the total weight of composition I). Organic solvent

[0173] The colorant composition I) according to the invention may also include one or more water-soluble organic solvents (solubility greater than or equal to 5% in water at 25°C and atmospheric pressure).

[0174] Examples of water-soluble organic solvents that may be mentioned include linear or branched, preferably saturated, monoalcohols or diols comprising 2 to 10 carbon atoms, such as ethyl alcohol, isopropyl alcohol, hexylene glycol (2-methyl-2,4-pentanediol), neopentyl glycol and 3-methyl-1,5-pentanediol, butylene glycol, dipropylene glycol and propylene glycol; aromatic alcohols such as phenylethyl alcohol; polyols containing more than two hydroxyl functions, such as glycerol; polyol ethers, for example monomethyl, monoethyl and monobutyl ether of ethylene glycol, propylene glycol or ethers thereof, for example monomethyl ether of propylene glycol; and also diethylene glycol alkyl ethers, in particular C1-C4 alkyl ethers, for example diethylene glycol monoethyl ether or diethylene glycol monobutyl ether, alone or as a mixture.

[0175] Water-soluble organic solvents, when present, generally represent between 1% and 20% by weight relative to the total weight of the dye composition I) according to the invention, and preferably between 3% and 15% by weight, or between 4% and 10% by weight. Alkaline agent

[0176] The colorant composition I) according to the invention may further comprise one or more alkaline agents.

[0177] The alkali agent(s) may in particular be chosen from aqueous ammonia, alkali metal carbonates or bicarbonates, organic amines having a pKb at 25 °C less than 12, in particular less than 10 and even more advantageously less than 6; from the salts of the amines mentioned above with acids such as carbonic acid or hydrochloric acid: it should be noted that this is the pKb corresponding to the function of the highest basicity.

[0178] Preferably, composition I) according to the present invention can be free or substantially free of aqueous ammonia.

[0179] Preferably, the amines are chosen from alkanolamines, in particular comprising a primary, secondary or tertiary amine function, and one or more linear or CrC8 branched alkyl groups bearing one or more hydroxyl radicals; from oxyethylenated and / or oxypropylenated ethylenediamines, and from amino acids and compounds having the following formula: Rx^ ^Rz ZNW-N Ry Rt

[0180] wherein W is a Ci-C6 alkylene residue optionally substituted by a hydroxyl group or a Ci-C6 alkyl radical; Rx, Ry, Rz and Rt, which may be identical or different, represent a hydrogen atom or a Ci-C6 alkyl, Ci-C6 hydroxyalkyl or Ci-C6 aminoalkyl radical.

[0181] According to one embodiment of the invention, the colorant composition I) according to the invention comprises at least one alkanolamine and / or at least one basic amino acid, more advantageously at least one alkanolamine, such as an ethanolamine, or mixtures thereof.

[0182] Advantageously, the content of the alkali agent(s) is in the range of 0.01% to 30% by weight, preferably from 0.1% to 20% by weight, or from 1% to 10% or 5% by weight relative to the total weight of composition I). It should be noted that this content is expressed as NH3 when the alkali agent is aqueous ammonia.

[0183] The pH of composition I) of the invention is preferably from 6 to 11.

[0184] The pH can be adjusted by adding acidifying agents, such as hydrochloric acid, (ortho)phosphoric acid, sulfuric acid, boric acid, and also carboxylic acids, for example acetic acid, lactic acid or citric acid, or sulfonic acids. Alkaline agents such as those previously mentioned can also be used. Fatty phase

[0185] The colorant composition I) according to the invention may further comprise a cosmetically acceptable fatty substance.

[0186] According to a particular embodiment, the fatty substance is free of carboxylic acid groups.

[0187] The term “fatty substance” means organic compounds that are insoluble in water at room temperature (25 °C) and atmospheric pressure (760 mmHg) (solubility less than 5%, preferably 1%, and even more preferably 0.1%). They may preferably have in their structure a sequence of at least two siloxane groups or at least one hydrocarbon-based chain comprising at least 6 carbon atoms. In addition, fatty substances are generally soluble in organic solvents under the same conditions of temperature and pressure, for example, chloroform, ethanol, benzene, or deca-methylcyclopentasiloxane.

[0188] Fatty substances are in particular selected from among lower alkanes, fatty alcohols, fatty acid esters, fatty alcohol esters, oils, in particular mineral, vegetable, animal or synthetic oils without silicone, silicone-free waxes, and silicones.

[0189] It is recalled that, for the purposes of the invention, fatty alcohols, fatty esters and fatty acids more particularly contain one or more linear or branched, saturated or unsaturated hydrocarbon groups comprising 6 to 30 carbon atoms, which is / are optionally substituted, in particular by one or more hydroxyl groups (in particular 1 to 4). If unsaturated, these compounds may comprise one to three conjugated or non-conjugated carbon-carbon double bonds.

[0190] As regards lower alkanes, these alkanes comprise from 6 to 16 carbon atoms and are linear or branched, optionally cyclic. By way of example, alkanes may be chosen from a hexane and a dodecane, isoparaffins such as isohexadecane and isodecane.

[0191] Examples of silicone-free oils that can be used in the composition of the invention include:

[0192] - oils based on hydrocarbons of animal origin, such as perhy- drosqualene;

[0193] - oils based on hydrocarbons of vegetable origin, such as triglycerides liquid fatty acids containing 6 to 30 carbon atoms, for example heptanoic or octanoic acid triglycerides, or alternatively, for example, sunflower oil, corn oil, soybean oil, pumpkin seed oil, grapeseed oil, sesame seed oil, hazelnut oil, apricot oil, macadamia oil, arara oil, castor oil, avocado oil, caprylic / capric acid triglycerides, for example those sold by the Stéarineries Dubois company or those sold under the names Miglyol® 810, 812 and 818 by the Dynamit Nobel company, jojoba oil and shea oil;

[0194] - linear or branched hydrocarbons of more than 16 carbon atoms and of origin mineral or synthetic, such as liquid paraffins, petroleum jelly, liquid petroleum jelly, polydecenes, and hydrogenated polyisobutenes such as Parleam®;

[0195] - fluorinated oils, for example perfluoromethylcyclopentane and perfluoro- 1,3-Dimethylcyclohexane, sold under the names Flutec® PCI and Flutec® PC3 by BNFL Fluorochemicals; perfluoro-1,2-dimethylcyclobutane; per-fluoroalkanes such as dodecafluoropentane and tetradecafluorohexane, sold under the names PF 5050® and PF 5060® by 3M, or bromoperfluorooctyl sold under the name Foralkyl® by Atochem; nonafluoromethoxybutane and nonafluoroethoxyisobutane; perfluoromorpholine derivatives such as 4-trifluoromethyl perfluoromorpholine sold under the name PF 5052® by 3M.

[0196] The fatty alcohols that can be used in the composition of the invention are not oxyalkylated. They are saturated or unsaturated, linear or branched, and comprise from 6 to 30 carbon atoms, and more particularly from 8 to 30 carbon atoms. Examples include cetyl alcohol, stearyl alcohol and mixtures thereof (cetylstearyl alcohol), octyldodecanol, 2-butyloctanol, 2-hexyldecanol, 2-undecylpentadecanol, oleyl alcohol, and linoleyl alcohol.

[0197] The useful esters are the esters of Ci-C26 aliphatic mono- or polyacids, saturated or unsaturated, linear or branched, and of Ci-C26 aliphatic mono- or polyalcohols, saturated or unsaturated, linear or branched, the total number of carbon atoms of the esters being more particularly greater than or equal to 10.

[0198] Among the monoesters, mention may be made of dihydroabietyl behenate; octyldodecyl behenate; isocetyl behenate; cetyl lactate; C12-C15 alkyl lactate; isostearyl lactate; lauryl lactate; linoleyl lactate; oleyl lactate; (iso)stearyl octanoate; isocetyl octanoate; octyl octanoate; cetyl octanoate; decyl oleate; isocetyl isostearate; isocetyl laurate; isocetyl stearate; isocetyl octanoate; isocetyl oleate; isononyl isononanoate; isostearyl palmitate; methylacetyl ricinoleate; myristyle stearate; octyl isononanoate; 2-ethylhexyl isononate; octyl palmitate; octyl pelargonate; octyl stearate; octyldodecyl erucate; oleyl erucate;ethyl and isopropyl palmitates, 2-ethylhexyl palmitate, 2-octyldecyl palmitate, alkyl myristates such as isopropyl, butyl, cetyl, 2-octyldodecyl, the; myristyle or stearyl myristate, hexyl stearate, butyl stearate, isobutyl stearate; dioctyl malate, hexyl laurate, 2-hexyldecyl laurate.

[0199] Still within the context of this variant, esters of dicarboxylic or tricarboxylic acids in C4-C22 and of alcohols in C1-C22 and esters of mono-, di- or tricarboxylic acids and of di-, tri-, tetra- or pentahydroxy alcohols in C2-C26 can also be used.

[0200] The following may be specifically mentioned: diethyl sebacate; diisopropyl sebacate; diisopropyl adipate; di-n-propyl adipate; dioctyl adipate; diisostearyl adipate; dioctyl maleate; glyceryl undecylenate; octyldodecyl stearoyl stearate; pentaerythrityl monoricinoleate; pentaerythrityl tetraisononanoate; pentaerythrityl tetrapelargonate; pentaerythrityl tetraisostearate; pentaerythrityl tetraoctanoate; propylene glycol dicaprylate; propylene glycol dicaprate; tridecyl erucate; triisopropyl citrate; triisostearyl citrate; glyceryl trilactate; glyceryl trioctanoate; trioctyldodecyl citrate; trioleyl citrate; propylene glycol dioctanoate; neopentyl glycol diheptanoate; diethylene glycol diisononanoate; ethylene glycol distearate;diethylene glycol distearate and polyethylene glycol distearate.

[0201] The composition may also include, as a fatty acid ester, sugar esters and C6-C30 fatty acid diesters, and preferably C12-C22 esters. It is recalled that the term "sugar" means oxygenated hydrocarbon compounds containing several alcohol functional groups, with or without aldehyde or ketone functional groups, and comprising at least four carbon atoms. These sugars may be monosaccharides, oligosaccharides, or polysaccharides.

[0202] Examples of suitable sugars that may be mentioned include sucrose (or saccharose), glucose, galactose, ribose, fucose, maltose, fructose, mannose, arabinose, xylose and lactose, and derivatives thereof, in particular alkylated derivatives, such as methylated derivatives, for example methylglucose.

[0203] Sugar esters of fatty acids may be selected in particular from the group comprising the esters or mixtures of esters of sugars described above and of fatty acids in the range of C6-C30 and preferably C12-C22, linear or branched, saturated or unsaturated. If unsaturated, these compounds may comprise one to three conjugated or non-conjugated carbon-carbon double bonds.

[0204] The esters according to this variant can also be selected from mono-, di-, tri-, tetraesters and polyesters, and mixtures thereof.

[0205] These esters may be selected, for example, from oleates, laurates, palmitates, myristates, behenates, cocoates, stearates, linoleates, li- nolenates, caprates and arachidonates, or mixtures thereof such as, in particular, mixed esters of oleo-palmitate, oleo-stearate and palmito-stearate.

[0206] It is particularly preferable to use monoesters and diesters and in particular mono- or dioleates, stearates, behenates, oleopalmitates, linoleates, linolenates and oleostearates of sucrose, glucose or methylglucose.

[0207] Advantageously, the content of fat(s) is in the range of 0.01% to 45% by weight, preferably from 0.1% to 30% by weight, or from 1% to 15% by weight relative to the total weight of composition I). Adjuvants

[0208] The colorant composition I) according to the invention may also include one or more cosmetic adjuvants.

[0209] For example, composition I) may include one or more additives that are well known in the art, such as anionic, nonionic or amphoteric polymers or mixtures thereof, agents for preventing hair loss, vitamins and provitamins including panthenol, derivatives of these vitamins (in particular esters) and mixtures thereof; sunscreens, mineral or organic pigments, sequestrants, plasticizers, solubilizers, acidifying agents, opacifiers, hydroxy acids, pearlescent agents, perfumes and preservatives.

[0210] It goes without saying that a person skilled in the art will take care to select this or these optional additional compound(s) in such a way that the advantageous properties intrinsically associated with the invention are not, or are not substantially, negatively affected by the envisaged addition(s).

[0211] The above adjuvants can generally be present in an amount, for each of them, of between 0 and 20% by weight, or between 0 and 10% by weight, relative to the total weight of composition I).

[0212] Composition I) according to the invention can be in the form of fluid or thickened liquids, gels or creams, preferably cream. Developer composition II)

[0213] The dye composition B) placed in the kit according to the present invention may include a developer composition II).

[0214] According to one embodiment of the present invention, the developer composition II) is placed separately from the dye composition I). Oxidizing

[0215] Composition II) of composition B) according to the present invention comprises at least one oxidant.

[0216] The developer composition II) of the present invention may comprise one or several oxidants for general use as one of the active components of composition II). The term "oxidant" is intended to refer to an oxidant other than atmospheric oxygen. More specifically, the oxidant is selected from the group consisting of hydrogen peroxide, urea peroxide, alkali metal bromates, peroxy salts such as persulfates or perborates, peracids and their precursors, and alkali or alkaline earth metals; or a polymer-type complex capable of releasing hydrogen peroxide.

[0217] Advantageously, the oxidant is hydrogen peroxide.

[0218] The concentration of the oxidant can be from 0.1% by weight to 50% by weight, or (preferably from 0.5% by weight to 20% by weight, or from 1% by weight to 15% by weight, based on the weight of composition II). Solvent

[0219] The developer composition II) of the present invention may comprise one or more solvent(s), for example, water and / or an organic solvent. The useful solvent may be selected from those mentioned for the "solvent" of composition I) above.

[0220] Composition I) and II) of dye composition B) may independently use identical or different solvents, respectively.

[0221] When water is used as a solvent in developer composition II) according to the invention, it is preferably used in a content in the range of 40% to 95% by weight, more preferably 50% to 90% by weight, or 60% to 85% by weight, relative to the total weight of composition II).

[0222] Examples of water-soluble organic solvents that may be mentioned include polyols containing more than two hydroxyl functions, such as glycerol.

[0223] Water-soluble organic solvents, when present, generally represent between 0.01% and 10% by weight relative to the total weight of the dye composition I) according to the invention, and preferably between 0.1% and 5% by weight, or between 0.5% and 1% by weight. Surfactant

[0224] The developer composition II) according to the invention may comprise one or more surfactant(s), for example, in particular an anionic surfactant and / or a nonionic surfactant, preferably a nonionic surfactant. The relevant surfactant may be selected from those mentioned for the "surfactant" in composition I) above. Chelating agent

[0225] The colorant composition I) and / or the developer composition II) of the dye composition B) according to the present invention may include at least one chelating agent.

[0226] According to the present invention, the useful chelating agent comprises aminocarboxylic acids, for example, ethylenediaminetetraacetic acid (EDTA), aminonotriacetic acid, diethylenetriaminepentaacetic acid, and in particular the alkali metal salt thereof, for example, N,N-bis(carboxymethyl)glutamic acid, tetrasodium EDTA, tetrasodium salt of N,N-bis(carboxymethyl)glutamic acid (glutamic acid diacetic acid, GLDA); hydroxylcarboxylic acids, for example, citric acid, tartaric acid, glucuronic acid, succinic acid, ethylenediaminedisuccinic acid (EDDS), and in particular the alkali metal salt thereof; hydroxyl aminocarboxylic acids, for example, hydroxyethylethylenediamine triacetic acid (HEDTA), dihydroxyethylglycine (DEG), and in particular the alkali metal salt thereof; polyphosphonic acid, and in particular the alkali metal salt thereof;another organic acid containing phosphorus, for example, phytic acid, and in particular the alkali metal salt thereof, for example, sodium phytate, potassium phytate polycarboxylic acid, for example, polyacrylic acid, polymethacrylic acid, and in particular the alkali metal salt thereof.

[0227] In one embodiment, at least one water-soluble chelating agent is an alkali metal hydroxyl polycarboxylate represented by an alkane containing 1 to 4 carbon atoms, preferably containing 2 or 3 carbon atoms, substituted by 1, 2, or 3 hydroxyl groups (-OH), preferably by one (1) hydroxyl group, and further substituted by 2, 3, 4, or 5 carboxylate groups (-C00M), preferably by 2 or 3 carboxylate groups (-C00M), wherein the multiple M groups independently represent an H or an alkali metal, provided that at least one of the M groups represents an alkali metal, such as Na, K, or Li, preferably all M groups represent an alkali metal, such as Na, K, or Li, preferably Na.More specifically, at least one alkali metal hydroxyl polycarboxylate may be chosen from sodium tartrates, sodium citrates, potassium tartrates, potassium citrates, and their hydrates, preferably sodium citrates, especially trisodium citrate. Here, sodium citrates are used to refer to monosodium citrate, disodium citrate, and trisodium citrate, and the other alkali metal hydroxyl polycarboxylates may be understood in a similar way.

[0228] Among others, the alkali metal mentioned above is preferably sodium or potassium, particularly sodium. Accordingly, preferred chelating agents may include sodium citrate, tetrasodium EDTA, tetrasodium GLDA, trisodium EDDS, sodium phytate, or a mixture thereof.

[0229] In particular, composition I) and / or composition II) of the present invention may comprise at least one water-soluble chelating agent in a concentration of situated in a range of 0.01% to 1% by weight, in particular 0.1% to 0.4% by weight, relative to the total weight of the second composition. Method and use

[0230] An object of the invention is a process for dyeing human keratin fibers, in particular hair, using the dyeing kit as described above.

[0231] Another object of the invention is a method for reducing the tendency to stain of a dye composition, using the dye kit as described above.

[0232] Another object of the invention is a method for slowing down dyeing or intermediate reactions, using the dyeing kit as described above.

[0233] The invention also relates to the use of the dyeing kit as described above for dyeing keratin fibers, in particular hair.

[0234] The invention also relates to the use of the dyeing kit as described above to reduce the tendency of the dyeing kit to stain.

[0235] The invention also relates to the use of a dyeing kit as described above to slow down dyeing or intermediate reactions, using the dyeing kit as described above.

[0236] In particular, the invention relates to a method for slowing down reactions of a dye or intermediates thereof, characterized in the mixing of a pyra-zolidine-3,5-dione compound of formula (1) comprising phenyl methyl pyrazolone with the dye.

[0237] Preferably, the pyrazolidine-3,5-dione compound of formula (1) is mixed with the tincture before application of the tincture, or the pyrazolidine-3,5-dione compound of formula (1) is applied to the position at which the tincture was applied for less than 10 minutes, less than 5 minutes, or less than 3 minutes.

[0238] The present invention also relates to the use of a pyrazolidine-3,5-dione compound of formula (1) comprising phenyl methyl pyrazolone to reduce the tendency of a dye to stain.

[0239] In another aspect, the present invention relates to the use of a composition for dyeing keratin fibers, while reducing the formation of stains in areas other than keratin fibers, wherein the composition comprises a pyrazolidine-3,5-dione compound of formula (1) comprising phenyl methyl pyrazolone.

[0240] According to a preferred embodiment, the dyeing process of the invention comprises mixing the dye composition I) and the composition II) immediately before use, and applying the resulting mixture as described above to the keratin fibers.

[0241] More particularly, by "mixture" or a variant thereof, this is intended to designate the action of putting the colorant composition I) of the present invention into a container or palm, together with the developer composition II) as described above, with or without agitation of the latter.

[0242] According to a preferred variant of the preferred embodiment, the colorant composition I) of the present invention is placed in a container or palm jointly with the developer composition II) as described above, without agitation of the latter.

[0243] Regardless of the process used and the number of compositions used, the composition(s) described above, optionally mixed in advance, are applied to wet or dry the keratin fibers.

[0244] As stated above in the section "Form of Addition of Pyrazolidine-3,5-Dione Compound of Formula (1)", pyrazolidine-3,5-dione compound of formula (1) can be supplied in various forms for use with dye composition I) and developer composition II), so as to slow down the dyeing reaction. In particular, if a pyrazolidine-3,5-dione compound of formula (1) is placed in a chamber 2 separate from a chamber 1, for the dyeing kit described according to the present invention:

[0245] - if the user does not wish to slow down the dyeing process, or the formation of stains by the Dyeing is not a problem, room 2 may not be used;

[0246] - if the user wishes to avoid any staining, he can mix chamber 2 with 1 before dyeing;

[0247] - if the user wishes to determine whether or not to use chamber 2 depending on Depending on whether or not an actual stain appears, he can initially use only chamber 1, and when the dye composition adheres to the hand or any other area, chamber 2 can be applied immediately; and

[0248] - if the user wishes to avoid the formation of stains, and desires a quick dyeing, He can apply chamber 2 in advance to positions where stains are most likely to appear but should be avoided, for example the hands.

[0249] Alternatively, if a pyrazolidine-3,5-dione compound of formula (1) is supplied jointly with dye composition I), for example, being added directly into composition I), the dyeing process is still slowed down, compared to the same dyeing process except in the absence of any pyrazolidine-3,5-dione compound of formula (1).

[0250] The mixed compositions, including the dye composition I) and the developer composition II), and optionally the pyrazolidine-3,5-dione compound of formula (1), are usually left in place on the fibers for a time generally in the range of 1 minute to 1 hour and preferably of 5 to 30 minutes.

[0251] The temperature during the process is conventionally between 20 and 80 °C and preferably between 20 and 60 °C. After treatment, the human keratin fibers are advantageously rinsed with water. They can optionally be further washed with shampoo, followed by rinsing with water, before being dried or left to dry.

[0252] The process can be repeated several times to obtain the desired colouring.

[0253] The dyeing kit according to the present invention makes it possible to obtain a process for generating color gradients, comprising: the provision of a composition including the dye and component A) from the dyeing kit; the application of a first part of the composition for dyeing, and with a time interval, the application of a subsequent part of the composition, in which the number of intervals depends on the number of colors to be obtained.

[0254] The dyeing kit mentioned above can also be equipped with a means for distributing the desired mixture onto the hair, such as, for example, the device described in patent FR 2 586 913.

[0255] The following examples are given purely as illustrations of the present invention. EXAMPLES:

[0256] The quantities / concentrations of ingredients in the compositions / formulas described below are expressed as % by weight, relative to the total weight of each composition / formula. Example 1

[0257] The following LA and LB colorant compositions were prepared from the ingredients indicated in Table 1 below (in which the contents were indicated as % by weight of materials relative to the total weight of the composition):

[0258] [Tables 1] Ingredients: LA LB LAURIC ACID 3 3 LAURETH-12 7 7 CETEARYL ALCOHOL 11.5 11.5 GLYCOL DISTEARATE 2 2 OLETH-30 4 4 DECETH-3 10 10 ETHANOLAMINE 1.35 1.35 RESORCINOL 1 1 p-PHENYLENEDIAMINE 1 1 PROPYLENE GLYCOL 7 7 EDTA 0.2 0.2 ASCORBIC ACID 0.25 0.25 SODIUM METABISULFITE 0.71 0.71 AMMONIUM HYDROXIDE 12 12 PYRAZOLINE-3,5-DIONE 2.5 WATER QS QS

[0259] The following ILA developer composition was prepared from the ingredients indicated in Table 2 below (in which the contents were indicated as % by weight of materials relative to the total weight of the composition):

[0260] [Tables2] Ingredients: Cetearyl Alcohol (and) Ceteareth-25 2.85, Trideceth-2 Carboxamide MEA 0.85, Glycerin 0.5, Tetrasodium Pyrophosphate 0.02, Sodium Stannate 0.04, Pentasodium Pentatate 0.15, Hydrogen Peroxide 12, Water / Aqua QS Example 2

[0261] Compositions LA~B were mixed respectively with compositions II-A~B at a weight ratio of 1:1.5, to provide mixtures A and B.

[0262] The mixtures were then measured to determine viscosity according to CID-012-02 H. The results are shown in Table 3 below:

[0263] [Tables3] Properties Mixture A Mixture B Viscosity (M4) 20.5 28.5 Example 3

[0264] Compositions LA~B were mixed with compositions II-A~B respectively at a weight ratio of 1:1.5 to provide mixtures A and B. The mixtures were applied to 1 g of hair on a 27 °C hot plate for 30 minutes. The hair was rinsed in a beaker containing 400 ml of water for 10 s. The transparency of the rinse water was observed in the beaker. Photographs were taken to record the experiment. The stain resistance performance of the mixtures was rated by an internal expert panel from 0 to 10, where 10 represented completely clean and 0 represented extremely dirty. The results are provided in Table 4 below and [Fig. 1]:

[0265] [Tables4] Performance Mix A Mix B Mix C Mix D Rinse water Very clean Clean Very clean Slightly dirty Internal score (0-10) 9.5 8 9.5 5

[0266] Cleaning level performance.

Claims

Claims

1. A method for reducing stain formation in areas not desired to be dyed or for slowing down reactions of a dye or intermediates thereof, said method comprising mixing a pyrazolidine-3,5-dione compound of formula (1) with the dye, said pyrazolidine-3,5-dione compound of formula (1) being: (1) wherein R 1 and R 2 are each independently H, hydroxyl, unsubstituted or substituted C 1 -C 30 alkyl, unsubstituted or substituted C 2 -C 30 alkenyl, cycloalkyl, an unsaturated heterocyclic group, a heterocyclic group or alkoxy, such as C 1 -C 10 alkyl or halogen-substituted C 1 -C 10 alkyl, preferably C 1 -C 6 alkyl or halogen-substituted C 1 -C 6 alkyl, C 3 -C 10 alkenyl, C 3 -C 10 cycloalkyl, C 3 -C 10 heterocyclic alkyl or C 3 -C 10 epoxyalkyl; and R3 is H, or unsubstituted or halogen-substituted C1-C10 alkyl, C3-C10 cycloalkyl, unsaturated C3-C10 heterocyclic group, C3-C10 heterocyclic alkyl, or C3-C10 alkoxy, such as C1-C6 alkyl or C1-C4 alkyl, preferably H, wherein the halogen is preferably F, Cl or Br, wherein the dye comprises: I) a dye composition I), comprising: i) at least one oxidative dye; wherein the oxidative dye comprises one or more oxidation bases selected from the group consisting of para-phenylenediamines, bis(phenyl)alkylenediamines, para-aminophenols, meta-aminophenols, ortho-aminophenols, heterocyclic bases, and addition salts thereof, and mixtures thereof; and / or wherein the oxidative dye further comprises one or more couplers to be combined with the oxidizing base, which is selected from the group consisting of meta-phenylenediamines, meta-aminophenols, meta-diphenols, naphthalene-based couplers, heterocyclic couplers, and addition salts thereof, and mixtures thereof, and II) a developer composition II), comprising: ii) at least one oxidant, wherein the oxidant is selected from the group consisting of hydrogen peroxide, urea peroxide, alkali metal bromates, peroxy salts; and a polymer-like complex capable of releasing hydrogen peroxide; wherein the pyrazolidine-3,5-dione compound of formula (1) is mixed with the dye before applying the dye, or the pyrazolidine-3,5-dione compound of formula (1) is applied at the position at which the dye has been applied for less than 10 minutes, less than 5 minutes, or less than 3 minutes.

2. A method according to claim 1, wherein in formula (1), R1 and R2 are each C1-C6 alkyl or C1-C4 alkyl; and / or R3 is H.

3. A method according to any preceding claim, wherein the pyrazolidine-3,5-dione compound of formula (1) is selected from the group consisting of 1,2-dimethyl-pyrazolidine-3,5-dione, 1,2-diethyl-pyrazolidine-3,5-dione, 1,2-dipropyl-pyrazolidine-3,5-dione and 1,2-dibutyl-pyrazolidine-3,5-dione.

4. A method according to any one of the preceding claims, wherein the pyrazolidine-3,5-dione compound of formula (1) is present in an amount ranging from 0.0001% to 10% by weight, or preferably from 0.005% to 5% by weight, or in particular from 0.01% to 3% by weight, or preferably from 0.1% to 2% by weight, relative to the total weight of the kit.

Images