FR3089794A1 - Solid composition for coloring or lightening keratin fibers comprising a phospholipid - Google Patents

Abstract

The present invention relates to a solid composition for coloring or lightening keratin fibers comprising: (a) one or more compounds chosen from chemical oxidizing agents and oxidation bases and (b) one or more phospholipids. The present invention also relates to a packaging article containing said composition. The present invention further relates to methods of coloring or lightening keratin fibers using said composition or said conditioning article. The present invention finally relates to the use of said composition or of said conditioning article for dyeing or lightening keratin fibers, and in particular human keratin fibers such as the hair.

Description

Description

Title of the invention: Solid composition for coloring or lightening keratin fibers comprising a phospholipid

The present invention relates to a solid composition for coloring or lightening keratin fibers, in particular human keratin fibers such as the hair, comprising a chemical oxidizing agent and / or an oxidation base and a phospholipid.

The present invention also relates to a packaging article containing said composition.

The present invention further relates to methods for coloring or lightening keratin fibers using said composition or said conditioning article.

The present invention finally relates to the use of said composition or of said conditioning article for dyeing or lightening keratin fibers, and in particular human keratin fibers such as the hair.

[0005] For a long time, many people have sought to modify the color of their hair, to color it or to lighten it.

[0006] To lighten the hair, lightening compositions are used which contain one or more oxidizing agents. Among these oxidizing agents, the most conventionally used are hydrogen peroxide or compounds capable of producing hydrogen peroxide by hydrolysis, such as urea peroxide or persalts such as perborates, percarbonates and persulfates, hydrogen peroxide and persulfates being particularly preferred.

These compositions can be aqueous compositions containing alkaline agents (amines or ammonia) which are diluted at the time of use with an aqueous composition of hydrogen peroxide.

These compositions can also be formed from anhydrous products, which are powders or pastes, which contain alkaline compounds (amines and / or alkali silicates), and a peroxygen reagent such as persulfates, perborates or percarbonates, ammonium or alkali metals, which is diluted at the time of use with an aqueous composition of hydrogen peroxide.

Furthermore, to color the hair permanently, it is known to use dye compositions containing oxidation dye precursors, generally called oxidation bases such as ortho- or para-phenylenediamines, ortho- or para-aminophenols or heterocyclic compounds such as pyrazoles, pyrazolinones or pyrazolo-pyridines. These oxidation bases are colorless or weakly colored compounds which, associated with oxidizing products, can give rise, through an oxidative condensation process, to colored compounds.

It is also possible to vary the shades obtained with these oxidation bases by combining them with couplers or color modifiers. The variety of molecules involved in the oxidation bases and couplers allows obtaining a rich palette of colors for keratin fibers.

The oxidation dyeing process therefore consists in applying to the keratin fibers, a dye composition comprising oxidation bases or a mixture of oxidation bases and couplers with an oxidizing agent, to be allowed to diffuse, then to rinse the fibers thus treated.

The colorings which result therefrom have the advantage of being permanent, powerful and resistant to external agents, in particular to light, bad weather, washing, perspiration and rubbing.

The dye compositions can be in different dosage forms, in particular powders, granules, pastes, creams or in liquid form.

These coloring or lightening compositions comprising oxidizing agents and alkaline agents, they sometimes cause a feeling of discomfort resulting in tingling and / or local heating of the scalp.

It is already known to protect keratin fibers which must undergo or have undergone coloring from a coloring precursor in particular by the use of particular polymers. However, this protection is not completely satisfactory, in particular, it can cause a less powerful dye due to the presence of these polymers.

The presence of fatty substances in the coloring or lightening compositions which are in liquid or cream form also makes it possible to reduce the discomfort of such compositions.

However, in solid compositions, the introduction of fatty substances tends to destabilize them.

Thus, there is a real need to provide solid coloring or lightening compositions, which do not have the drawbacks mentioned above, and in particular which limit the discomfort which can be felt by the consumer during discoloration or discoloration.

The coloring compositions must also retain good dyeing properties, in particular they must provide chromatic, powerful, intense and not very selective colors, that is to say colors which are homogeneous along the keratin fiber. They must also be tenacious to external aggressions such as washing, sweat, light or chemical treatments such as permanent deformation.

The lightening compositions must also lead to a good level of lightening, homogeneous from root to tip.

The Applicant has surprisingly discovered that a solid coloring or lightening composition, comprising one or more oxidation bases and / or one or more chemical oxidizing agents, combined with one or more phospholipids makes it possible to achieve the objectives set out above; in particular to obtain a solid coloring or lightening composition which limits the discomfort to the application, while exhibiting good dyeing or lightening properties as described above.

The subject of the present invention is in particular a solid composition for dyeing or lightening keratin fibers, in particular human keratin fibers, such as the hair, comprising:

at. one or more compounds chosen from chemical oxidizing agents and oxidation bases;

b. one or more phospholipids,

vs. possibly one or more oxidation couplers.

Such a composition makes it possible in particular to limit the discomfort that can be felt in the scalp at the time of application or after this application, while retaining a powerful coloring for the coloring compositions, or a good level of lightening for lightening compositions.

The present invention also relates to a packaging article comprising:

i. an envelope defining at least one cavity, the envelope comprising water-soluble and / or liposoluble fibers, preferably water-soluble fibers; and ii. a solid coloring or lightening composition as defined above;

It being understood that the solid coloring or lightening composition is found in one of the cavities defined by the envelope i).

The present invention further relates to a process for dyeing or lightening keratin fibers, in particular human keratin fibers such as the hair, comprising the following successive steps: - applying to said keratin fibers a composition ready for use resulting from the mixture of a solid coloring or lightening composition, as defined above, and a cosmetically acceptable medium

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Liquid,

- leave the ready-to-use composition to pause on said keratin fibers, - rinse said keratin fibers, and

- optionally shampoo said keratin fibers, rinse and dry them.

The present invention also relates to a process for coloring or lightening keratin fibers, in particular human keratin fibers such as the hair, comprising the following successive steps: - mixing a packaging article, as defined above, with a composition capable of dissolving the envelope of said packaging article,

- applying the resulting composition to said keratin fibers,

- allowing said resulting composition to pause on said keratin fibers, - rinsing said keratin fibers, and

- optionally shampoo said keratin fibers, rinse and dry them.

The present application further relates to the use of a solid coloring or lightening composition, as defined above, for the coloring or lightening of keratin fibers, and in particular human keratin fibers such as the hair.

The present invention also relates to the use of a packaging article, as defined above, for the coloring or lightening of keratin fibers, and in particular human keratin fibers such as the hair.

Other objects, characteristics, aspects and advantages of the invention will appear even more clearly on reading the description and the examples which follow.

In what follows, and unless otherwise indicated, the limits of a range of values are included in this range, in particular in the expressions "between" and "ranging from ... to ...".

Furthermore, the expressions “at least one” and “at least” used in the present description are respectively equivalent to the expressions “one or more” and “greater than or equal”.

The term “keratin materials” preferably denotes human keratin materials, such as the skin, the scalp and human keratin fibers, and more preferably the hair.

By "solid composition" is meant a composition which may be in the form of powder, paste or particles (for example spherical particles such as small beads).

By “powder” is meant a composition in powder form, with particles which have a size less than or equal to 5 mm (particle size evaluated by means of a RETSCH AS 200 DIGIT granulometer; Oscillation height: 1.25 mm / sieving time: 5 minutes). Advantageously, the particle size is between 1 μm and 3 mm, and more particularly between 5 μm and 2 mm.

By "particles" means small fractional objects formed of solid particles aggregated together, of varying shapes and sizes. They can be regular or irregular in shape. They can be in particular spherical (like granules, granules, beads), square, rectangular, or elongated like sticks. Particularly preferred are spherical particles.

By "paste" means a composition having a viscosity greater than 5 poises and preferably greater than 10 poises, measured at 25 ° C and at a shear rate of 1s ¹ ; this viscosity can be determined using a Coneplan rheometer.

The solid composition according to the invention may be in the form of a compressed solid composition, in particular using a manual or mechanical press.

Solid coloring or lightening composition

The solid coloring or lightening composition comprises one or more compounds chosen from oxidation bases or chemical oxidizing agents.

Oxidation bases

The solid composition according to the present invention may comprise one or more oxidation bases. Preferably, the oxidation bases are chosen in particular from heterocyclic bases, benzene bases, their addition salts, their solvates and their mixtures.

The oxidation bases which can be used in the composition of the invention are in particular chosen from paraphenylenediamines, bis-phenylalkylenediamines, paraaminophenols, ortho-aminophenols, heterocyclic bases, their addition salts, their solvates and their mixtures.

Among the para-phenylenediamines which may be mentioned, there are for example para-phenylenediamine, para-toluenediamine, 2-chloro-para-phenylenediamine, 2,3-dimethyl-para-phenylenediamine, 2, 6-dimethyl-para-phenylenediamine, 2,6-diethyl-para-phenylenediamine, 2,5-dimethyl-para-phenylenediamine, Ν, Ν-dimethyl-para-phenylenediamine, Ν, Ν-diethyl-para- phenylenediamine, Ν, Ν-dipropyl-para-phenylenediamine, 4- amino-N, N-diethyl 1- 3 -methylaniline, N, N-bis ^ -hydroxyethyl) -para-phenylenediamine, 4-N, N -bis ^ -hydroxyethyl) amino-2-methylaniline, 4-N, N-bis ^ -hydroxyethyl) amino-2-chloroaniline, 2- β-hydroxyethyl-para-phenylenediamine,

2-methoxymethyl-para-phenylenediamine, 2-fluoro-para-phenylenediamine, 2-isopropyl-para-phenylenediamine, N - ^ - hydroxypropyl) -para-phenylenediamine, 2-hydroxymethyl-para-phenylenediamine, N, N-dimethyl-3-methyl-para-phenylenediamine, Nethyl-N - ^ - hydroxyethyl) -para-phenylenediamine, N ^, Y-dihydroxypropyl) -para-phenylenediamine, N (4'-aminophenyl) -para- phenylenediamine, N-phenyl-para-phenylenediamine, 2- β-hydroxyethyloxy-para-phenylenediamine, 2 ^ -acetylaminoethyloxy-para-phenylenediamine, N ^ -methoxyethyl) -para-phenylenediamine, 4-aminophenylpyrrolidine -thienyl-para-phenylenediamine, 2 ^ -hydroxyethylamino-5-aminotoluene and 3-hydroxy-1- (4'-aminophenyl) pyrrolidine and the corresponding addition salts with an acid.

Among the aforementioned para-phenylenediamines, in particular, para-phenylenediamine, para-toluenediamine, 2-isopropyl-para-phenylenediamine, 2- β-hydroxyethyl-para-phenylenediamine, 2 ^ -hydroxyethyloxy-para- are preferred. phenylenediamine, 2,6-dimethyl-para-phenylenediamine, 2,6-diethyl-para-phenylenediamine, 2,3-dimethyl-para-phenylenediamine, N, N-bis (hydroxyethyl) -para-phenylenediamine, 2-chloro-para-phenylenediamine and 2 ^ -acetylaminoethyloxy-para-phenylenediamine and the corresponding addition salts with an acid.

Among the bis (phenyl) alkylenediamines which may be mentioned, there is for example N, N'-bis ^ -hydroxyethyl) -N, N'-bis (4'-aminophenyl) -1,3-diaminopropanol, N, N'-bis ^ -hydroxyethyl) -N, N'-bis (4'-aminophenyl) ethylenediamine, N, N'-bis (4-aminophenyl) tetramethylenediamine, N, N'-bis ^ -hydroxyethyl ) -N, N'-bis (4-aminophenyl) tetramethylenediamine, N, N'-bis (4-methylaminophenyl) tetramethylenediamine, N, N'-bis (ethyl) -N, N'-bis (4'- amino-3'-methylphenyl) ethylenediamine and 1,8-bis (2,5-diaminophenoxy) -3,6-dioxaoctane and the corresponding addition salts.

Among the para-aminophenols which are mentioned, there are for example paraaminophenol, 4-amino-3-methylphenol, 4-amino-3-fluorophenol, 4-amino-3-chlorophenol, 4-amino -3-hydroxymethylphenol, 4-amino-2-methylphenol, 4-amino-2-hydroxymethylphenol, 4-amino-2-methoxymethylphenol, 4-amino-2-aminomethylphenol, 4-amino-2 - ^ - hydroxyethylaminomethyl) phenol and 4-amino-2-fluorophenol and the corresponding addition salts with an acid.

Among the ortho-aminophenols which may be mentioned, there are for example 2-aminophenol, 2-amino-5-methylphenol, 2-amino-6-methylphenol and

5-acetamido-2-aminophenol and the corresponding addition salts.

Among the heterocyclic bases which may be mentioned, there are for example the pyridine, pyrimidine and pyrazole derivatives.

Among the pyridine derivatives which may be mentioned, there are the compounds for example described 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 corresponding addition salts.

Other pyridine oxidation bases which are useful in the present invention are the 3-aminopyrazolo [1,5-a] pyridine oxidation bases or the corresponding addition salts described, for example, in patent application FR 2 801 308. Examples which may be mentioned include pyrazolo [1,5-a] pyrid-3-ylamine, 2-acetylaminopyrazolo [1,5-a] pyrid-3-ylamine, 2 -morpholin-4-ylpyrazolo [1,5-a] pyrid-3-ylamine, 3-aminopyrazolo [1,5-a] pyridine-2-carboxylic acid, 2-methoxypyrazolo [1,5-a] pyrid -3-ylamine, (3-aminopyrazolo [1,5-a] pyrid-7-yl) methanol, 2- (3-aminopyrazolo [1,5-a] pyrid-5-yl) ethanol, 2- (3-aminopyrazolo [1,5-a] pyrid-7-yl) ethanol, (3-aminopyrazolo [1,5-a] pyrid-2-yl) methanol, 3,6-diaminopyrazolo [1,5- a] pyridine, 3,4-diaminopyrazolo [1,5-a] pyridine, pyrazolo [1,5-a] pyridine-3,7-diamine, 7-morpholin-4-ylpyrazolo [1,5-a ] pyrid-3-ylamine, pyrazolo [1,5-a] pyridine-3,5-diamine, 5-morpholin-4-ylpyrazolo [1,5-a] pyrid-3-ylamine, 2 - [( 3-amino pyrazolo [1,5-a] pyrid-5-yl) (2-hydroxyethyl) -amino] ethanol, 2 - [(3-aminopyrazolo [1,5-a] pyrid-7-yl) (2-hydroxyethyl) amino] ethanol, 3-aminopyrazolo [1,5-a] pyridin-5-ol, 3-aminopyrazolo [1,5-a] pyridin-4-ol, 3-aminopyrazolo [1,5-a] pyridin -6-ol, 3-aminopyrazolo [1,5-a] pyridin-7-ol, 2 ^ -hydroxyethoxy-3-amino-pyrazolo [1,5-a] pyridine; 2- (4-dimethylpiperazinium-1-yl) -3-amino-pyrazolo [1,5-a] pyridine; and the corresponding addition salts.

More particularly, the oxidation bases which are useful in the present invention are chosen from 3-aminopyrazolo- [1,5-a] -pyridines and preferably substituted on the carbon atom 2 by:

A) a group (di) (Ci-C ₆ ) (alkyl) amino, said alkyl group being able to be substituted by at least one hydroxy, amino, imidazolium group;

B) a heterocycloalkyl group containing 5 to 7 members and 1 to 3 heteroatoms, optionally cationic, optionally substituted by one or more (Ci-C ₆ ) alkyl groups, such as a di (Ci-C4) alkylpiperazinium group; or

C) a group (Ci-C ₆ ) alkoxy optionally substituted by one or more hydroxy groups such as a β-hydroxyalkoxy group and the corresponding addition salts.

Among the 3-aminopyrazolo- [1,5-a] -pyridine bases, it will be preferred in particular to use 2 [(3-aminopyrazolo [1,5-a] pyridin-2-yl) oxy] ethanol, and / or 4- (3-aminopyrazolo [1,5-a] pyridin-2-yl) -l, l-dimethylpiperazin-l-ium chloride and / or their corresponding addition salts or solvates

Among the pyrimidine derivatives which may be mentioned, there 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 their addition salts and their tautomeric forms, when a tautomeric equilibrium exists.

Among the pyrazole derivatives which may be mentioned, there are the compounds described in patents DE 3843892, DE 4133957 and patent applications WO 94/08969, WO 94/08970, FRA-2 733 749 and DE 195 43 988, such as 4,5-diamino-1-methylpyrazole, 4,5-diamino- l - ([> - hydroxyethyl) pyrazole, 3,4-diaminopyrazole, 4,5-diamino-l- (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, l-benzyl-4,5-diamino-3-methylpyrazole, 4,5-diamino-3-tert-butyl-l-methylpyrazole, 4,5 -diamino-1-tert-butyl-3-methylpyrazole, 4,5-diamino-1 - ^ - hydroxyethyl) -3-methylpyrazole, 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, l-methyl-3,4,5-triaminopyrazole, 3,5- diamino-1-methyl-4-methylaminopyrazole, 3,5-diamino-4 - ^ - hydroxyethyl) amino-1-methylpyrazole and the corresponding addition salts. It is also possible to use 4,5-diamino-1 - ([> - methoxyetiiyl) pyrazole.

A 4,5-diaminopyrazole will be used preferably and even more preferably 4,5-diamino-1 - ^ - hydroxyethyl) pyrazole and / or a corresponding salt.

Pyrazole derivatives which may also be mentioned include diamino-N, N-dihydropyrazolopyrazolones and in particular those described in patent application FR-A-2 886 136, such as the following compounds and the addition salts corresponding: 2,3-diamino-6,7-dihydro-1H, 5H-pyrazolo [1,2-a] pyrazol-l-one, 2-amino-3-ethylamino-6,7-dihydro-1H, 5H-pyrazolo [1,2-a] pyrazol-l-one, 2-amino-3-isopropylamino-6,7-dihydro-1H, 5H-pyrazolo [l, 2-a] pyrazol-l-one, 2-amino-3- (pyrrolidin-1-yl) -6,7-dihydro-1H, 5H-pyrazolo [1, 2-a] pyrazol-1-one, 4,5-diamino-1,2-dimethyl -1,2-dihydropyrazol-3-one, 4,5-diamino-1,2-diethyl-1,2-dihydropyrazol-3-one, 4,5-diamino-1,2-di- (2- hydroxyethyl) -1,2-dihydropyrazol-3-one, 2-amino-3- (2-hydroxyethyl) amino-6,7-dihydro-1H, 5H-pyrazolo [l, 2-a] pyrazol-l-one , 2-amino-3-dimethylamino-6,7-diliydro-1H, 5H-pyrazolo [1,2-a] pyrazol-l-one, 2,3-diamino-5,6,7,8-tetrahydro -1H, 6H-pyridazino [1,2-a] pyrazol-1-one, 4-amino-1,2-diethyl-5- (pyrrolidin-1 -yl) -1,2-dihydropyrazol-3-one, 4-amino-5- (3-dimethylaminopyrrolidin-1 -yl) -1,2-diethyl-1,2-dihydropyrazol-3-one, 2, 3-diamino-6-hydroxy-6,7-dihydro-1H, 5H-pyrazolo [1,2-a] pyrazol-1-one.

Preferably use 2,3-diamino-6,7-dihydro-1H, 5H-pyrazolo [l, 2-a] pyrazol-l-one and / or a corresponding salt.

Preferably 4,5-diamino-1 - ^ - hydroxyethyl) pyrazole and / or 2,3-diamino-6,7-dihydro-1H, 5H-pyrazolo [l, 2-a] pyrazol -l-one and / or 2 [(3-aminopyrazolo [1,5-a] pyridin-2-yl) oxy] ethanol and / or 4- (3-aminopyrazolo chloride [1,5-a] pyridin -2-yl) -1, l-dimethylpiperazin-l-ium and / or their corresponding salts or solvates as heterocyclic bases.

In general, the addition salts of the oxidation bases which can be used in the composition according to the invention are in particular chosen from addition salts with an acid, such as hydrochlorides, hydrobromides, sulfates, citrates, succinates, tartrates, lactates, tosylates, benzenesulfonates, phosphates and acetates.

Furthermore, the solvates of the oxidation bases represent more particularly the hydrates of said bases and / or the association of said bases with a linear or branched Ci to C ₄ alcohol such as methanol, ethanol, isopropanol, n-propanol. Preferably, the solvates are hydrates.

Preferably, the oxidation base or bases are chosen from paraphenylenediamines, bis-phenylalkylenediamines, para-aminophenols, bispara-aminophenols, ortho-aminophenols, heterocyclic bases, their addition salts, their solvates and their mixtures.

More preferably, the oxidation base or bases are chosen from paraphenylenediamines, and in particular para-toluenediamine, their addition salts, their solvates and their mixtures.

The total amount of the oxidation base (s), when present in the solid composition according to the present invention, preferably ranges from 0.001 to 20% by weight, more preferably from 0.01 to 10% by weight. weight, and better still from 0.1 to 7% by weight, relative to the total weight of the solid composition.

Chemical oxidizing agents

The composition according to the invention may also comprise one or more chemical oxidizing agents.

By "chemical oxidizing agent" is meant according to the invention an oxidizing agent different from oxygen in the air.

The chemical oxidizing agent (s) are preferably anhydrous and solid, that is to say in the form of powder, paste or particles (such as beads).

More particularly, the chemical oxidizing agent (s) are chosen from (i) peroxygenated salts such as, for example, persulfates, perborates, percarbonates of alkali or alkaline earth metals such as sodium carbonate peroxide or called percarbonate sodium, and peracids and their precursors; (ii) bromates or ferricyanides of alkali metals; (iii) solid chemical oxidizing agents generating hydrogen peroxide such as urea peroxide and polymer complexes which can release hydrogen peroxide, in particular those comprising a vinyl heterocyclic monomer such as polyvinylpyrrolidone / H ₂ O ₂ complexes particular in the form of powders, different from the polymer comprising at least one vinyl heterocyclic monomer (c), as defined below; (iv) oxidases producing hydrogen peroxide in the presence of a suitable substrate (for example glucose in the case of glucose oxidase or uric acid with uricase); and their mixtures.

According to one embodiment, the chemical oxidizing agent (s) are chosen from the complexes of hydrogen peroxide and of polymer containing as monomer at least one vinyl heterocyclic monomer, different from the polymer comprising at least one vinyl heterocyclic monomer (c), as defined below.

More particularly, the vinyl heterocyclic monomer is chosen from monomers comprising a heterocycle having 4 to 6 members, optionally condensed to a benzene ring and comprising from 1 to 4 intracyclic heteroatoms which may or may not be identical; the number of intracyclic heteroatoms being lower than that of the heterocycle links. Preferably, the number of intracyclic heteroatoms is 1 or 2.

More particularly, the heteroatom (s) are chosen from sulfur, oxygen, nitrogen, preferably from nitrogen and oxygen. According to an even more advantageous embodiment of the invention, the monomer comprises at least one intracyclic nitrogen atom.

The vinyl heterocycle can optionally be substituted by one or more C 1 to C ₄ and preferably C ₁ to C ₂ alkyl groups.

Preferably, the heterocyclic monomer is chosen from Nvinyl monomers.

Among the possible monomers, mention may be made of the following monomers, optionally substituted: N-vinylpyrrolidone, vinylcaprolactam, Nvinylpiperidone, N vinyl 3-morpholine, N-vinyl-4-oxazolinone, 2-vinylpyridine, 4-vinylpyridine, 2-vinylquinoline, 1-vinylimidazole, 1-vinylcarbazole. Preferably, the monomer is optionally substituted N-vinylpyrrolidine.

According to a particularly advantageous embodiment of the invention, the polymer is a homopolymer.

It is however not excluded to use a copolymer. In such a case, the comonomer (s) are chosen from vinyl acetate, (meth) acrylic acids, (meth) acrylic amides, C1 to C ₄ alkyl esters of (meth) acrylic acid substituted or not.

The polymer involved in this complex is preferably soluble in water. It can have variable average molecular weights, preferably between 10 ³ and 3.10 ⁶ g / mol, and more preferably between 10 ³ and 2.10 ⁶ g / mol. It is also possible to use mixtures of such polymers.

Advantageously, said complex comprises from 10 to 30% by weight of hydrogen peroxide, preferably from 13 to 25% by weight and more preferably from 18 to 22% by weight, relative to the total weight of the complex .

According to an even more advantageous variant of the invention, in this complex, the molar ratio between the vinyl heterocyclic monomer (s) and the hydrogen peroxide ranges from 0.5 to 2, and preferably from 0.5 to 1.

This complex is advantageously in the form of a substantially anhydrous powder.

Complexes of this type are described in particular in US5,008,106, US5,077,047, EP 832846, EP 714919, DE 4344131, DE 19545380 and the other polymer complexes described in US 5,008,093; US 3,376,110; US 5,183,901.

Examples of complexes that may be mentioned, for example, are products of the Peroxydone K-30, Peroxydone K-90, Peroxydone XL-10 type as well as the complexes formed with hydrogen peroxide and one of the following polymers such as Plasdone K-17, Plasdone K-25, Plasdone K-29/32, Plasdone K-90, Polyplasdone INL-10, Polyplasdone XL-10, Polyplasdone XL, Plasdone S-630, Styleze 2000 Terpolymer, series of Ganex copolymers, marketed by the company ISP.

According to a particularly preferred embodiment, the solid composition according to the present invention comprises one or more chemical oxidizing agents chosen from percarbonates of alkali metals, percarbonates of alkaline earth metals and their mixtures.

Preferably, the chemical oxidizing agent is sodium percarbonate.

The total amount of the chemical oxidizing agent (s), when they are present in the solid composition according to the present invention, preferably ranges from 30 to 55% by weight, and more preferably from 35 to 50% by weight, per relative to the total weight of the solid composition.

The phospholipids

The solid composition according to the invention further comprises one or more phospholipids.

The phospholipids used in the composition according to the invention may be of plant or animal origin and be in pure form or in the form of a mixture.

Preferably, the phospholipids are phospholipids of plant origin.

The phospholipids used in the composition can be in particular lecithins which are a complex mixture of phosphatides chosen mainly from phosphatidic acid, phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, lysophosphatidylcholine and / or phosphatidylinositol, associated with variable amounts of other substances such as triglycerides, glycolipids, sphingolipids, fatty acids and carbohydrates.

We can therefore choose either the phospholipids mentioned above, or the lecithins containing these phospholipids.

The composition according to the invention comprises at least one phospholipid preferably chosen from lecithins.

The lecithins which can be used according to the present invention can be hydrogenated or non-hydrogenated.

Non-hydrogenated lecithins are generally obtained by lipid extraction using non-polar solvents, from vegetable or animal fats. This lipid fraction usually comprises, for the most part, glycerophospholipids, including phosphatidylcholine.

Animal or plant sources which can be used to extract non-hydrogenated lecithins are, for example, soy, sunflower or eggs. The glycerophospholipids included, in high proportion, in these lecithins are mainly phosphatidylcholine and phosphatidylethanolamine.

Preferably, the lecithins are lecithins of plant origin.

The non-hydrogenated lecithins suitable for the implementation of the present invention may be lecithins derived from soybeans, sunflowers, eggs and / or their mixtures.

Lecithins are usually provided in dissolved form in fatty acids, triglycerides or other solvents, or in the form of powders or breads.

These are usually mixtures of lecithins, the content of glycerophospholipids in the products as marketed, generally varies from about at least 15% to about at least 95%.

Among the non-hydrogenated lecithins which may be suitable for the use of cosmetic compositions in accordance with the present invention, mention may be made of the lecithins sold under the references NATTERMANN PHOSPHOLIPID®, PHOSPHOLIPON 80® and PHOSALE 75® by the company AMERICAN LECITHIN COMPANY, EPIKURON 145V, TOPCITHIN 300, EMULMETIK 930, OVOTHIN 200 and ORGANIC LECITHIN marketed by the company LUCAS MEYER, LIPOID S 20 marketed by the company LIPOID KOSMETIK, ALCOLEC F 100 by the company AMERICAN LECITHIN COMPANY.

The phospholipids can be chosen from hydrogenated lecithins.

These hydrogenated lecithins are obtained by controlled hydrogenation of non-hydrogenated lecithins as described above.

As hydrogenated lecithin which can be used in the composition according to the invention, there may be mentioned, for example, that which is marketed under the reference NIKKOL LECINOL S 10 by NIKKO.

Preferably, the solid composition according to the invention comprises one or more lecithins, preferably one or more lecithins of plant origin, better the composition according to the invention comprises a soy lecithin, better still a non-hydrogenated soy lecithin .

The phospholipid (s) may be present in a total content ranging from 0.1 to 30% by weight relative to the total weight of the solid composition, better from 1 to 30% by weight, preferably from 5 at 25% by weight, better still from 10 to 20% by weight, relative to the total weight of the solid composition.

The lecithin (s), and in particular the soy lecithin, can be present in a total content ranging from 0.1 to 30% by weight relative to the total weight of the solid composition, better still from 1 to 30 % by weight, preferably from 5 to 25% by weight, better still from 10 to 20% by weight, relative to the total weight of the solid composition.

The oxidation couplers

The solid composition according to the present invention may optionally further comprise one or more oxidation couplers conventionally used for dyeing keratin fibers.

Among these oxidation couplers, mention may in particular be made of metaphenylenediamines, meta-aminophenols, meta-diphenols, naphtha lenic couplers, heterocyclic couplers, their addition salts, their solvates and their mixtures.

By way of example, mention may be made of resorcinol, 2-methyl-5-hydroxyethylaminophenol, 2,4-diaminophenoxyethanol, 1,3-dihydroxybenzene, l, 3-dihydroxy-2-methylbenzene, 4 -chloro-1,3-dihydroxybenzene, 2,4-diamino-l - ^ - hydroxyethyloxy) benzene, 2-amino-4 - ^ - hydroxyethylamino) -l-methoxybenzene, 1,3-diaminobenzene, l, 3-bis (2,4-diaminophenoxy) propane, 3-ureidoaniline, 3-ureido-l-dimethylaminobenzene, sesamol, l ^ -hydroxyethylamino-3,4-methylenedioxybenzene, Γα-naphthol, 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 - ^ - hydroxyethyl) amino-3,4-methylenedioxybenzene, 2,6-bis ^ -hydroxyethylamino) toluene, 6-hydroxyindoline, 2,6-dihydroxy-4-methylpyridine, 1H-3-methylpyrazol- 5-one, 1-phenyl-3-methylpyrazol-5-one, 2,6-dimethylpyrazolo [1,5-b] -1,4,4-triazole, 2,6-dimethyl [3,2- c] -l, 2,4-triazole and the 6-methylpyrazolo [1,5-a] benzimidazole, 2-methyl-5-aminophenol, 5-N - ^ - hydroxyethyl) amino-2-methylphenol, 3-aminophenol (or meta-aminophenol), 3- amino-2-chloro-6-methylphenol, the corresponding addition salts with an acid and the corresponding mixtures.

Preferably, the coupler (s) are chosen from meta-phenylenediamines, meta-aminophenols, their addition salts and their mixtures, and more preferably from 2,4-diaminophenoxyethanol, resorcinol, meta-aminophenol , their addition salts, their solvates and their mixtures.

The addition salts of the oxidation couplers optionally present in the composition according to the invention are in particular chosen from addition salts with an acid such as hydrochlorides, hydrobromides, sulfates, citrates, succinates , tartrates, lactates, tosylates, benzenesulfonates, phosphates and acetates, and addition salts with a base such as sodium hydroxide, potassium hydroxide, ammonia, amines or alkanolamines.

Furthermore, the solvates of the oxidation couplers represent more particularly the hydrates of said couplers and / or the association of said couplers with a linear or branched C1 to C ₄ alcohol such as methanol, ethanol, isopropanol, npropanol. Preferably, the solvates are hydrates.

The total amount of the oxidation coupler (s), when they are present in the solid composition according to the invention, preferably ranges from 0.001 to 20% by weight, more preferably from 0.01 to 10% by weight , and better still from 0.1 to 7% by weight, relative to the total weight of the solid composition.

The alkaline agents

The solid composition according to the present invention may optionally further comprise one or more alkaline agents.

The alkaline agent (s) may be chosen from silicates and metasilicates, such as the metasilicates of alkali metals; carbonates or hydrogen carbonates of alkali or alkaline earth metals, such as lithium, sodium, potassium, magnesium, calcium or barium; and their mixtures.

The alkaline agent (s) can also be chosen from ammonium salts, and in particular inorganic ammonium salts.

Preferably, the ammonium salt or salts are chosen from ammonium halides such as ammonium chloride, ammonium sulphate, ammonium phosphate, ammonium nitrate and their mixtures.

More preferably, the ammonium salt is ammonium chloride or ammonium sulfate.

In a preferred embodiment, the solid composition according to the present invention comprises one or more alkaline agents.

Even more preferably, the solid composition according to the present invention comprises one or more ammonium salts, preferably chosen from ammonium chloride or ammonium sulfate, and better still ammonium sulfate.

The total amount of the alkaline agent (s), when they are present in the solid composition according to the invention, preferably ranges from 0.1 to 15% by weight, more preferably from 1 to 10% by weight, and better from 2 to 5% by weight, relative to the total weight of the solid composition.

The thickening polymers

The solid composition according to the present invention may optionally further comprise one or more thickening polymers.

Advantageously, the thickening polymer (s) are chosen from the following polymers:

(A) non-ionic amphiphilic polymers comprising at least one fatty chain and at least one hydrophilic unit;

(B) anionic amphiphilic polymers comprising at least one hydrophilic unit, and at least one fatty chain unit;

(C) crosslinked acrylic acid homopolymers;

(D) crosslinked homopolymers of 2-acrylamido-2-methyl-propane sulfonic acid and their partially or fully neutralized crosslinked acrylamide copolymers;

(E) homopolymers of ammonium acrylate or copolymers of ammonium acrylate and acrylamide;

(F) homopolymers of dimethylaminoethyl-methacrylate quaternized with methyl chloride or copolymers of dimethylamino-ethyl methacrylate quaternized with methyl chloride and acrylamide; and

(G) polysaccharides such as:

(Gl) scleroglucan gums (biopolysaccharide of microbial origin),

(G2) the gums derived from plant exudates such as gum arabic, Ghatti,

Karaya and Tragacanthe;

(G3) celluloses and derivatives;

(G4) guar gums and derivatives; or

(G5) starches or derivatives.

It should be noted that in the case of the present invention, the thickening polymers have a role on the viscosity of the ready-to-use composition, that is to say of the composition comprising the solid composition according to the present invention and a cosmetically acceptable medium.

According to the invention, the amphiphilic polymers are more particularly hydrophilic polymers capable, in the medium of the composition, and more particularly in an aqueous medium, of reversibly associating with each other or with other molecules.

Their chemical structure more particularly comprises at least one hydrophilic zone and at least one hydrophobic zone. By hydrophobic group is meant a radical or polymer with a hydrocarbon chain, saturated or unsaturated, linear or branched, comprising at least 8 carbon atoms, preferably at least 10 carbon atoms, more preferably from 10 to 30 carbon atoms, especially from 12 to 30 carbon atoms and better still from 18 to 30 carbon atoms. Preferably, the hydrocarbon group comes from a monofunctional compound. For example, the hydrophobic group can be derived from a fatty alcohol such as stearyl alcohol, dodecyl alcohol, decyl alcohol. It can also denote a hydrocarbon polymer such as for example polybutadiene.

Preferably, the thickening polymer (s) are chosen from polysaccharides, preferably from starches or derivatives.

The starch molecules used in the present invention can originate from all vegetable sources of starch, in particular cereals and tubers; more particularly it can be starches of corn, rice, cassava, barley, potato, wheat, sorghum, peas, oats, tapioca. It is also possible to use the hydrolysates of the starches mentioned above. The starch is preferably obtained from the potato.

The starches can be modified chemically or physically, in particular by one or more of the following reactions: pregelatinization, oxidation, crosslinking, es17 terification, etherification, amidation, heat treatments.

Diamidon phosphates or compounds rich in diamidon phosphate will preferably be used, such as the product proposed under the references PREJEL VA70-T AGGL (gelatinized hydroxypropylated cassava diamidon phosphate) or PREJEL TK1 (gelatinized cassava diamidon phosphate) or PREJEL 200 (acetylated cassava diamidon phosphate gelatinized) by the company AVEBE or NATIONAL STARCH STRUCTURE ZEA (pregelatinized corn diamidon phosphate).

In a preferred embodiment, the solid composition according to the invention comprises one or more thickening polysaccharides, preferably chosen from starches or derivatives

The total amount of the thickening polymer (s), when they are present in the solid composition according to the invention, preferably ranges from 1 to 40.% by weight, more preferably from 5 to 30% by weight, and better still from 10 to 20% by weight, relative to the total weight of the solid composition.

The surfactants

The solid composition according to the present invention may optionally further comprise one or more surfactants, preferably chosen from anionic surfactants, amphoteric or zwitterionic surfactants, nonionic surfactants, cationic surfactants and their mixtures.

For the purposes of the present invention, the term “surfactant” means an agent comprising at least one hydrophilic group and at least one lipophilic group in its structure, and which is preferably capable of reducing the surface tension of the water. , and comprising in its structure, as possible repeating units, only alkylene oxide units and / or sugar units and / or siloxane units. Preferably, the lipophilic group is a fatty chain comprising from 8 to 30 carbon atoms.

When the composition comprises one or more surfactants, preferably, the solid composition according to the present invention comprises one or more surfactants chosen from anionic surfactants.

The term “anionic surfactant” is understood to mean a surfactant containing only anionic groups as ionic or ionizable groups. These anionic groups are preferably chosen from the groups -C (O) OH, -C (O) O-, -SO ₃ H, -S (O) ₂ O-, OS (O) ₂ OH, -OS (O ) ₂ O-, -P (O) OH ₂ , -P (O) ₂ O-, -P (O) O ₂ , -P (OH) ₂ , = P (O) OH, -P (OH) O , = P (O) O, = POH, = PO, the anionic parts comprising a cationic counter ion such as those originating from an alkali metal, an alkaline earth metal, or from an amine or from an ammonium.

As examples of anionic surfactants which can be used in the composition according to the invention, mention may be made of alkyl sulfates, alkyl ether sulfates, alkylami doethersulfates, alkylarylpolyethersulfates, monoglyceride sulfates, alkylsulfonates, alkylamidesulfonates, alkylarylsulfonates, alphaolefin sulfonates, paraffin sulfonates, alkylsulfosuccinates, alkylethersulfosuccinates, alkylamide sulfosuccinates, alkylsulfoacetates, acylsarcosinates, acylglutamates, acylglutamatesacetylsulfosuccinates and alkylsulfosuccinates of alkyl and polyglycoside-polycarboxylic acids, acyllactylates, salts of D-galactoside-uronic acids, salts of alkyl ether-carboxylic acids, salts of alkyl aryl ether-carboxylic acids, salts of alkyl amidoether carboxylic acids, and the corresponding non-salified forms of all these compounds, the alkyl and acyl groups of all these compounds comprising from 6 to 24 carbon atoms and the aryl group denoting a phenyl group.

These compounds can be oxyethylenated and then preferably comprise from 1 to 50 ethylene oxide units.

The salts of C ₆ to C ₂₄ alkyl monoesters and of polyglycoside-polycarboxylic acids may be chosen from C ₆ to C ₂₄ alkyl polyglycoside-citrates, C ₆ to C ₂₄ alkyl polyglycoside-tartrates ₆ to C ₂₄ and C ₆ to C ₂₄ alkyl polyglycoside sulfosuccinates.

When the anionic surfactant (s) are in salt form, they can be chosen from alkali metal salts such as the sodium or potassium and preferably sodium salt, ammonium salts, d salts amines and in particular amino alcohols or alkaline earth metal salts such as magnesium salts.

As examples of amino alcohol salts, mention may be made in particular of the mono-, di- and triethanolamine salts, the mono-, di- or tri-isopropanolamine salts, the 2-amino-2 salts -methyl-1 -propanol, 2-amino-2-methyl-1,3-propanediol and tris (hydroxy-methyl) amino methane.

Preferably using the alkali or alkaline earth metal salts and in particular the sodium or magnesium salts.

Among the anionic surfactants mentioned, it is preferred to use the acylisethionates and the corresponding non-salified forms, the acyl groups containing from 6 to 24 carbon atoms or a mixture of these compounds.

The total amount of the surfactant (s), when they are present in the solid composition according to the invention, preferably ranges from 0.05 to 15% by weight, more preferably from 0.1 to 10% by weight, and better still from 0.75 to 5% by weight, relative to the total weight of the solid composition.

The additives

The solid composition according to the present invention may optionally further comprise one or more additives, different from the compounds of the invention and among which there may be mentioned, cationic, anionic, nonionic, amphoteric polymers or their mixtures different from thickening polymers previously described, dandruff agents, antiseborrheic agents, hair loss and / or regrowth agents, vitamins and pro-vitamins including panthenol, sun filters, mineral or organic pigments, sequestering agents, plasticizers , solubilizing agents, acidifying agents, mineral thickening agents, opacifying or pearlescent agents, antioxidants, reducing agents, hydroxy acids, perfumes, preservatives, pigments and ceramides.

Naturally, a person skilled in the art will take care to choose this or these optional additional compounds in such a way that the advantageous properties intrinsically attached to the solid coloring or lightening composition according to the invention are not, or not substantially, altered by the planned addition (s).

The above additives can generally be present in an amount for each of them between 0 and 20% by weight, relative to the total weight of the solid composition.

Preferably, the solid coloring or lightening composition according to the invention is anhydrous.

For the purposes of the present invention, the term “anhydrous” means that the solid composition comprises less than 5% by weight, better still less than 2% of water relative to the total weight of the solid composition. In particular, the solid composition does not include any added water, the possible presence of water being linked to the commercial raw materials used.

Composition ready to use

The present invention also relates to a ready-to-use composition comprising a solid coloring or lightening composition, as defined above, and a cosmetically acceptable medium. In other words, the ready-to-use liquid composition results from the mixture of a solid coloring or lightening composition, as defined above, and a cosmetically acceptable liquid medium.

The total amount of the oxidation base (s) present in the ready-to-use composition according to the present invention when it is a coloring composition, preferably ranges from 0.001 to 15% by weight. weight, and more preferably from 0.005 to 10% by weight, better still from 0.075 to 7% by weight relative to the total weight of the ready-to-use composition.

The total amount of the chemical oxidizing agent (s) present in the ready-to-use composition according to the invention preferably ranges from 1 to 50% by weight, and more preferably from 5 to 30% by weight, better 8 to 20% by weight relative to the total weight of the ready-to-use composition

The total amount of the phospholipid (s) present in the ready-to-use composition according to the invention preferably ranges from 0.1 to 20% by weight, and more preferably from 0.5 to 10% by weight, better from 1 to 8% by weight relative to the total weight of the ready-to-use composition.

The total amount of the coupler (s), when they are present in the ready-to-use composition according to the invention, preferably ranges from 0.001 to 15% by weight, and more preferably from 0.005 to 10% by weight , better from 0.075 to 7% by weight relative to the total weight of the ready-to-use composition.

Cosmetically acceptable liquid medium

By cosmetically acceptable medium is meant, according to the present application, a medium compatible with keratin fibers, in particular human keratin fibers, such as the hair.

The cosmetically acceptable medium consists of water or a mixture of water and one or more organic solvents.

As organic solvent, there may be mentioned, for example, alkanols, linear or branched, C ₂ to C ₄ , such as ethanol, isopropanol, tert-butanol or n-butanol; glycerol; polyols and polyol ethers such as 2-butoxyethanol, propylene glycol, hexylene glycol, dipropylene glycol, propylene glycol monomethyl ether, monoethyl ether and monomethyl ether of diethylene glycol, as well as aromatic alcohols or ethers such as benzyl alcohol or phenoxyethanol, and mixtures thereof.

[0182] Preferably, the cosmetically acceptable medium is water.

The mixing ratio (expressed by weight) between the solid composition and the cosmetically acceptable medium is preferably between 10/90 and 90/10, and more preferably between 10/90 and 50/50, better still between 20 / 80 and 30/70.

[0184] Packaging article

The present invention also relates to a packaging article comprising:

i. an envelope defining at least one cavity, the envelope comprising water-soluble and / or liposoluble fibers, preferably water-soluble fibers; and ii. a solid coloring or lightening composition as defined above;

It being understood that the solid coloring or lightening composition is found in one of the cavities defined by the envelope i).

By "water-soluble" is meant water-soluble, in particular at a rate of at least 10 grams per liter of water, preferably at least 20 g / 1, better still at least 50 g / 1, to a temperature less than or equal to 35 ° C.

By "liposoluble" is meant soluble in a liquid fatty substance as defined below, in particular at a rate of at least 10 grams per liter of liquid fatty substance in particular in a vegetable or mineral oil such as oil of petrolatum, preferably at least 20 g / 1 in a liquid fatty substance, better at least 50 g / 1 in a fatty substance, at a temperature less than or equal to 35 ° C.

By "temperature less than or equal to 35 ° C" is meant a temperature not exceeding 35 ° C but greater than or equal to 0 ° C, for example ranging from more than 1 to 35 ° C, better still from 5 to 30 ° C and even better from 10 to 30 ° C or 10 to 20 ° C. It is understood that all the temperatures are given at atmospheric pressure.

The packaging article according to the invention is preferably water-soluble or liposoluble at a temperature less than or equal to 35 ° C.

The packaging article may include one or more cavities, at least one of which contains the solid coloring or lightening composition as defined above.

The packaging article preferably comprises a single cavity.

The envelope may consist of a sheet made of water-soluble and / or fat-soluble fibers, folded back on itself or of a first sheet made of water-soluble and / or fat-soluble fibers and covered by a second sheet also made of water-soluble and / or fat-soluble fibers. The folded ply on itself or the two plies are then hermetically assembled so that the solid coloring or lightening composition according to the present invention cannot diffuse outside. The assembly is preferably carried out at the periphery of the ply (s). Preferably, the heat-sealing is carried out with entanglement of the fibers of the parts of the envelope to be welded. The solid coloring or lightening composition is thus enveloped by the envelope i) hermetically. The solid coloring or lightening composition is distinct from the tablecloth or the envelope.

Such an envelope is different from thin water-soluble or liposoluble films in which the solid coloring composition would be incorporated into the layer (s) forming the envelope. Compared with these thin water-soluble or liposoluble films, the envelope according to the invention has the advantage of allowing the incorporation of constituents incompatible with it, of being simpler to implement because it does not require premixing, neither dissolving the constituents in a solvent, nor heating to evaporate the solvent. The method of manufacturing the packaging article of the invention is also faster and less expensive than the method of making thin films.

In addition, when the active agents, here in particular the oxidation bases and the couplers, are used in dispersion to form a thin film, this can cause compatibility problems, mechanical problems (rupture of the film) and impose asset concentration limits. In addition, the envelope and the plies useful for the invention have the advantage of allowing greater diversity in the choice of the shape and the appearance of the article because the water-soluble and / or liposoluble sheet (s) can have a variable thickness and density giving access to a wide variety of shapes and sizes, while the thin film is difficult to dry if the thickness is too large, and it is fragile and difficult to handle if the size is too large .

Advantageously, the envelope or the plies are "deformable to the touch", that is to say in particular that the envelope and the plies deform when they are grasped and pinched between the fingers of a user.

Preferably, the solid coloring or lightening composition is present in a cavity generated by at least two plies constituting the envelope and defining between them a cavity, said plies preferably comprising water-soluble fibers.

According to a particular embodiment of the invention, at least one of the plies of the packaging article consists exclusively of water-soluble fibers, more preferably all the plies of the packaging article of the invention consist exclusively of water-soluble fibers, preferably at a temperature less than or equal to 30 ° C.

By “fiber” is meant any object whose length is greater than its section. In other words, it is necessary to understand an object of length L and of diameter D such that L is greater and preferably much greater (ie at least 3 times more) than D, D being the diameter of the circle in which is inscribed the fiber section. In particular, the L / D ratio (or form factor) is chosen from the range going from 3.5 to 2500, preferably from 5 to 500, and better still from 5 to 150. The section of a fiber can be any shape, round, serrated or fluted, or even bean-shaped, but also multilobed, in particular trilobed or pentalobate, X-shaped, ribbon, square, triangular, elliptical, or other. The fibers of the invention can be hollow or non-hollow. The fibers used according to the present invention can be of natural, synthetic or even artificial origin. Advantageously, said fibers are of synthetic origin.

[0200] A "natural fiber" is by definition a fiber naturally present in nature, directly or after mechanical and / or physical treatment. This category includes fibers of animal origin such as cellulose fibers, especially extracted from wood, vegetables or algae, from rayon.

The "artificial fibers" are either completely synthetic or derived from natural fibers which have been subjected to one or more chemical treatments in order to improve in particular the mechanical and / or physico-chemical properties.

The “synthetic fibers” include the fibers obtained by chemical synthesis and are generally fibers made up of one or more polymers and / or copolymers, mono- or multicomponent, composite or not, which are generally extruded and / or stretched to the desired fiber diameter.

The fibers of the envelope of the packaging article according to the invention may consist of one or more water-soluble polymers.

The water-soluble polymer (s) of the invention contain water-soluble units in their backbones. The water-soluble units are obtained from one or more water-soluble monomers.

By "water-soluble monomer" is meant a monomer whose solubility in water is greater than or equal to 1%, preferably greater than or equal to 5% at 25 ° C and at atmospheric pressure (760 mm Hg).

Said synthetic water-soluble polymer (s) used in the context of the present invention are advantageously obtained from water-soluble monomers comprising at least one double bond. The latter can be chosen from cationic, anionic, nonionic monomers and mixtures thereof.

As water-soluble monomers capable of being used as precursors of water-soluble units, alone or as a mixture, the following monomers which may be in free or salified form may be mentioned:

[0208] - (meth) acrylic acid,

[0209] - styrene sulfonic acid,

[0210] - vinylsulfonic acid and (meth) allylsulfonic acid,

[0211] -1’ vinyl phosphonic acid,

[0212] - N-vinylacetamide and N-methyl N-vinylacetamide,

- N-vinylformamide and N-methyl N-vinylformamide,

[0214] - N-vinyllactams comprising a cyclic alkyl group having from 4 to 9 carbon atoms, such as N-vinylpyrrolidone, N-butyrolactam and N-vinylcaprolactam, [0215] - maleic anhydride,

[0216] - itaconic acid,

- the vinyl alcohol of formula CH ₂ = CHOH,

The vinyl ethers of formula CH ₂ = CHOR in which R is a hydrocarbon radical, linear or branched, saturated or unsaturated, having from 1 to 6 carbons,

[0219] - the halides (chloride) of dimethyldiallyl ammonium,

- quaternized dimethylaminoethyl methacrylate (MADAME),

[0221] - (meth) acrylamidopropyltrimethylammonium halides (chloride) (APTAC and MAPTAC),

[0222] - methylvinylimidazolium halides (chloride),

[0223] - 2-vinylpyridine and 4-vinylpyridine,

[0224] -1’ acrylonitrile,

[0225] - glycidyl (meth) acrylate,

- vinyl halides (chloride) and vinylidene chloride,

[0227] - vinyl monomers; and

- their mixtures.

As anionic monomers, mention may in particular be made of (meth) acrylic acid, acrylamido-2-methylpropanesulfonic acid, itaconic acid and their alkali metal, alkaline earth or ammonium salts or those from an organic amine such as alkanolamine.

As nonionic monomers, mention may especially be made of (meth) acrylamide, N-vinylformamide, N-vinylacetoamide and hydroxypropyl (meth) acrylate, vinyl alcohol of formula CH ₂ = CHOH ,.

As examples of water-soluble cationic monomers, mention may be made in particular of the following compounds as well as their salts: (methyl) dimethylaminoethyl acrylate, (meth) acryloyl-oxyethyltrimethylammonium, (meth) acryloyloxyethyl-dimethylbenzyl-ammonium, of N [dimethylaminopropyl] (meth) -acrylamide, of (meth) acryl-amidopropyltrimethylammonium, of (meth) acrylamido-propyldimethylbenzylammonium, of (meth) acrylate of dimethylaminohydroxypropryl, of (meth) acryloyloxyhydroxypropyl-trimethylammonium, (ethyl) and dimethyldiallylammonium.

Preferably, the polymer useful according to the invention is polymerized from at least one cationic monomer as defined above.

As polymers which are particularly preferred in the invention, mention may in particular be made of those polymerized from:

[0234] - 10% of acryloyloxyethyldimethylbenzylammonium chloride and 90% of acrylamide,

[0235] - 30% of acryloyloxytrimethylammonium chloride, 50% of acryloyloxyethyldimethylbenzylammonium chloride, and 20% of acrylamide, [0236] - 10% of acryloyloxyethyltrimethylammonium chloride and of 90% of acrylamide,

[0237] - 30% diallyldimethylammonium chloride and 70% acrylamide, or

[0238] - 30% acrylic acid and 70% acrylamide.

According to a particular embodiment, the polymers are polymerized from a cationic monomer and acrylic acid, the number of moles of the cationic monomer being greater than the number of moles of acrylic acid.

As water-soluble polymers derived from natural products, mention may be made of polysaccharides, i.e. polymers with sugar units.

By “sugar unit” is meant a unit derived from a carbohydrate of formula C _n (H ₂ O) _n i or (CH ₂ O) _{n which} can be optionally modified by substitution and / or by oxidation and / or by dehydration. The sugar units capable of entering into the composition of the polymers of the invention preferably come from the following sugars: glucose, galactose, arabinose, rhamnose, mannose, xylose, fucose, fructose, anhydrogalactose, galacturonic acid, glucuronic acid, mannuronic acid , galactose sulfate, anhydrogalactose sulfate.

The polymers with sugar unit (s) according to the invention can be of natural or synthetic origin. They can be non-ionic, anionic, amphoteric or cationic. The basic units of the sugar-based polymers of the invention can be mono or disaccharides.

Mention may in particular be made, as polymers capable of being used, of the following native gums, as well as their derivatives:

A) exudates from trees or shrubs of which:

[0245] - gum arabic (branched polymer of galactose, arabinose, rhamnose and glucuronic acid);

[0246] - ghatti gum (polymer derived from arabinose, galactose, mannose, xylose and glucuronic acid);

[0247] - karaya gum (polymer derived from galacturonic acid, galactose, rhamnose and glucuronic acid);

- tragacanth (or tragacanth) gum (polymer of galacturonic acid, galactose, fucose, xylose and arabinose);

B) gums obtained from algae, of which:

[0250] - agar (polymer derived from galactose and anhydrogalactose);

[0251] - alginates (polymers of mannuronic acid and glucuronic acid);

[0252] - carrageenans and furcelleranes (polymers of galactose sulfate and anhydrogalactose sulfate);

C) gums obtained from seeds or tubers of which:

[0254] - guar gum (polymer of mannose and galactose);

[0255] - locust bean gum (polymer of mannose and galactose);

[0256] - fenugreek gum (polymer of mannose and galactose);

[0257] - tamarind gum (polymer of galactose, xylose and glucose);

- Konjac gum (glucose polymer and mannose), the main constituent of which is glucomannan, is a high molecular weight polysaccharide (500,000 <Mglucomannan <2,000,000) composed of units of D-mannose and D -glucose with a branching every 50 or 60 units approximately;

[0259] d) microbial gums, of which:

[0260] - xanthan gum (polymer of glucose, mannose acetate, mannose / pyruvic acid and glucuronic acid);

[0261] - gellan gum (partially acylated glucose polymer, rhamnose and glucuronic acid);

[0262] - scleroglucan gum (glucose polymer);

[0263] - gum of biosaccharides (polymer of galacturonic acid, of fucose and of Dgalactose) for example that marketed under the name of FUCOGEL 1.5P from SOLABIA (POLYSACCHARIDE RICH IN FUCOSE (20%) AT 1.1% IN WATER STABILIZED (PHENOXYETHANOL 1.5%)),

E) plant extracts of which:

- cellulose (polymer of glucose);

[0266] - starch (glucose polymer);

[0267] - inulin (polymer of fructose and glucose).

These polymers can be modified physically or chemically. Preferably, these chemical or physical treatments are applied to guar gums, carob gums, starches and celluloses.

The nonionic guar gums which can be used according to the invention can be modified by C 1 to C ₆ hydroxylakyl groups. Among the hydroxyalkyl groups, mention may be made of hydroxymethyl, hydroxyethyl, hydroxypropyl and hydroxybutyl groups.

Such nonionic guar gums optionally modified with hydroxyalkyl groups are for example sold under the trade names JAGUAR HP8, JAGUAR HP60 and JAGUAR HP120 by the company RHODIA CHIMIE.

The guar gums modified with cationic groups which can more particularly be used according to the invention are guar gums comprising cationic trialkylammonium groups. Preferably, 2 to 30% by number of the hydroxyl functions of these guar gums carry trialkyammonium cationic groups. Even more preferably, 5 to 20% of the number of hydroxyl functions of these guar gums are connected by cationic trialkyammonium groups. Among these trialkylammonium groups, mention may very particularly be made of trimethylammonium and triethylammonium groups. Even more preferably, these groups represent from 5 to 20% by weight relative to the total weight of the modified guar gum.

According to the invention, guar gums modified with 2,3-epoxypropyl trimethylammonium chloride can be used.

These guar gums modified by cationic groups are products already known in themselves and are for example described in US Patents 3,589,578 and US 4,013,307. Such products are also sold in particular under the names of JAGUAR C13 S, JAGUAR C 15, JAGUAR C 17 by RHODIA CHIMIE.

As modified locust bean gum, cationic locust bean gum containing hydroxypropyltrimmonium groups such as Catinal CLB 200 offered by the company TOHO can be used.

The starch molecules used in the present invention can originate from all vegetable sources of starch, in particular cereals and tubers; more particularly it can be starches of corn, rice, cassava, barley, potato, wheat, sorghum, peas, oats, tapioca. It is also possible to use the hydrolysates of the starches mentioned above. The starch is preferably obtained from the potato.

The starches can be modified chemically or physically, in particular by one or more of the following reactions: pregelatinization, oxidation, crosslinking, esterification, etherification, amidation, heat treatments.

Diamidon phosphates or compounds rich in diamidon phosphate will preferably be used, such as the product proposed under the references PREJEL VA70-T AGGL (gelatinized hydroxypropylated cassava diamidon phosphate) or PREJEL TK1 (gelatinized cassava diamidon phosphate) or PREJEL 200 (acetylated cassava diamidon phosphate gelatinized) by the company AVEBE or NATIONAL STARCH STRUCTURE ZEA (gelatinized corn diamidon phosphate).

According to the invention, amphoteric starches can also be used, comprising one or more anionic groups and one or more cationic groups. The anionic and cationic groups can be linked to the same reactive site of the starch molecule or to different reactive sites; preferably they are linked to the same reactive site. The anionic groups can be of the carboxylic, phosphate or sulphate type, and preferably carboxylic. The cationic groups can be of primary, secondary, tertiary or quaternary amine type.

The preferred amphoteric starch is a starch chloroethylamido dipropionate.

The celluloses and cellulose derivatives can be anionic, cationic, amphoteric or non-ionic.

Among these derivatives, there are the cellulose ethers, the cellulose esters and the cellulose ether esters.

Among the cellulose esters, mention may be made of inorganic cellulose esters (cellulose nitrates, sulfates or phosphates), organic cellulose esters (monoacetates, triacetates, amidopropionates, acetatebutyrates, acetatepropionates or acetatetrimellitates of cellulose) and esters mixed organic / inorganic cellulose such as acetate butyratesulfates and acetate propionatesulfates of cellulose.

Among the ether esters of celluloses, mention may be made of hydroxypropyl meth thylcellulose phthalates and ethylcellulose sulfates.

Among the nonionic cellulose ethers, mention may be made of alkylcelluloses such as methylcelluloses and ethylcelluloses (for example Ethocel standard 100 Premium from DOW CHEMICAL); hydroxyalkylcelluloses such as hydroxymethylcelluloses, hydroxyethylcelluloses (for example Natrosol 250 HHR proposed by AQUALON) and hydroxypropylcelluloses (for example Klucel EL of AQUALON); hydroxyalkyl-alkylcellulose mixed celluloses such as hydroxypropyl-methylcelluloses (for example Methocel E4M from DOW CHEMICAL), hydroxyethyl-methylcelluloses, hydroxyethyl-ethylcelluloses (for example Bermocoll E 481 EQ from AKZO NOBEL) and hydroxybutyl-methylcelluloses.

Among the anionic cellulose ethers, mention may be made of carboxyalkylcelluloses and their salts. As an example, mention may be made of carboxymethylcelluloses, carboxymethylmethylcelluloses (for example Blanose 7M from the company AQUALON) and carboxymethylhydroxyethylcelluloses, as well as their sodium salts.

Among the cationic cellulose ethers, mention may be made of cross-linked or non-crosslinked quaternized hydroxyethylcelluloses. The quaternizing agent can in particular be diallyldimethylammonium chloride (for example Celquat L200 from NATIONAL STARCH). As another cationic cellulose ether, mention may be made of hydroxyethyl cellulose hydroxypropyltrimethylammonium (for example Ucare polymer JR 400 from AMERCHOL).

Among the associative polymers with sugar unit (s), mention may be made of celluloses or their derivatives, modified by groups comprising at least one fatty chain such as alkyl, arylalkyl, alkylaryl groups or their mixtures where the alkyl groups are C ₈ -C ₂₂ ; nonionic alkylhydroxyethylcelluloses such as the products NATROSOL PLUS GRADE 330 CS and POLYSURE 67 (C ₁₆ alkyl) sold by the company AQUALON; quaternized (cationic) alkyl hydroxyethylcelluloses such as the products QUATRISOET LM 200, QUATRISOET LM-X 529-18-A, QUATRISOET LM-X 529-18-B (C ₁₂ alkyl) and QUATRISOET LM-X 529-8 (alkyl in C _[8 ) sold by the company AMERCHOL, the products CRODACEL QM, CRODACEL QL (C _[2 ) alkyl and CRODACEL QS (C _[8] alkyl) sold by the company CRODA and the product SOETCAT SL 100 sold by the company AMERCHOL ; nonionic nonoxynylhydroxyethylcelluloses such as the product AMERCELL HM-1500 sold by the company AMERCHOL; non-ionic alkylcelluloses such as the product BERMOCOLL EHM 100 sold by the company BEROL NOBEL.

As polymers containing sugar unit (s) derived from associative guar, mention may be made of hydroxypropylguars modified by a fatty chain such as the product ESAELOR HM 22 (modified by a C ₂₂ alkyl chain) sold by the company LAMBERTI; the product MIRACARE XC 95-3 (modified by an alkyl chain in Cu) and the product RE 205-146 (modified by an alkyl chain in C ₂ o) sold by RHODIA CHIMIE.

The polymer (s) with sugar motif (s) of the invention are preferably chosen from guar gums, locust bean gums, xanthan gums, starches and celluloses, in their modified form (derivatives) or not modified.

Preferably, the polymers containing sugar unit (s) according to the invention are nonionic.

[0291] More preferably, the polymer or polymers containing sugar unit (s) of the invention are chosen from non-ionic guar gums modified, in particular modified by C 1 to C ₆ hydroxyalkyl groups.

Mention may more particularly be made of water-soluble fibers which include fibers based on PolyVinylAlcohol, fibers of polysaccharides such as glucomannans, starches, celluloses, in particular extracted from wood, fibers of polyalginic acid, fibers of polylactic acid, polyalkyleneoxide fibers, and mixtures thereof.

More preferably, the water-soluble fiber or fibers used in the invention are chosen from cellulose fibers, and in particular cellulose fibers extracted from wood.

[0294] In addition, the envelope and the plies of the invention can be woven or nonwoven.

According to a particular embodiment, the envelope and the sheets of the invention are woven. In the context of the present invention, a “woven” material results from an organized assembly of fibers, in particular polymeric water-soluble fibers, and more particularly from an interweaving, in the same plane, of said fibers, arranged in the direction of the warp and fibers arranged, perpendicular to the warp fibers, in the weft direction. The bond obtained between these warp and weft fibers is defined by a weave.

[0296] More particularly, the two layers or layers comprising the woven polymeric water-soluble fibers which constitute the envelope of the packaging article of the invention do not comprise any other additional layer which is superimposed on them.

According to another particularly advantageous embodiment of the invention, the envelope and the sheets are nonwoven.

For the purposes of the present invention, by “nonwoven” is meant a substrate comprising fibers, in particular water-soluble fibers, in which the individual fibers are arranged in a disordered manner in a sheet-like structure and which are neither woven or knitted. The fibers of the nonwoven are generally linked together, either under the effect of a mechanical action (for example needling, air jet, water jet, etc.), or under the effect of a thermal action , or by adding a binder.

Very preferably, the envelope and plies of the invention are nonwoven, and preferably made of cellulose fibers extracted from nonwoven wood.

The layers of the envelope may comprise a mixture of different fibers which are soluble in water at different temperatures (up to 35 ° C).

[0301] Preferably, the nonwoven consists essentially of water-soluble fibers, that is to say that it does not contain insoluble fibers.

Advantageously, the envelope and the plies have a small thickness, the plies may be made up of several layers. Preferably the thickness of the envelope and the plies ranges from 3 to 99.9% of its other dimensions. This thickness is notably less than 100 mm. The envelope and the layers are thus substantially flat, thin slices.

The surface delimiting the cavity or cavities has an extent generally less than 625 cm ² , and for example between 400 cm ² and 0.025 cm ² .

One can for example use an envelope and tablecloths as defined in French patent application No. 1,261,120 filed on November 22, 2012.

The packaging article according to the present invention may comprise one or more plies and water-soluble envelope of nonwovens.

Preferably, the amount of the envelope present in the packaging article according to the invention is between 0.5 and 20% by weight relative to the total weight of said article; advantageously between 1.0 and 10% by weight, particularly between 2 and 5% by weight; based on the total weight of the packaging item.

[0307] Coloring or lightening process

The present invention further relates to a process for dyeing or lightening keratin fibers, in particular human keratin fibers such as the hair, comprising the following successive steps: - applying to said keratin fibers a composition ready for use as defined above, that is to say resulting from the mixture of a solid coloring or lightening composition, as defined above, and a cosmetically acceptable medium;

- leave the ready-to-use composition to pause on said keratin fibers, - rinse said keratin fibers, and

- optionally shampoo said keratin fibers, rinse and dry them.

The present invention also relates to a process for dyeing or lightening keratin fibers, in particular human keratin fibers such as the hair, comprising the following successive steps: - mixing a packaging article, as defined above, with a composition capable of dissolving the envelope of said packaging article,

- applying the resulting composition to said keratin fibers, - letting said resulting composition pause on said keratin fibers, - rinsing said keratin fibers, and

- optionally shampoo said keratin fibers, rinse and dry them.

It is understood that the composition capable of dissolving the envelope depends on the nature of the envelope. In other words, the composition capable of dissolving the envelope is water or an aqueous composition, when the packaging article mainly or only contains a hydrophilic envelope. And, the composition capable of dissolving the envelope is an organic anhydrous composition or an aqueous composition comprising at least one liquid fatty substance or at least one organic solvent different from liquid fatty substances such as lower monoalcohols, for example ethanol, or as polyols, for example propylene glycol or glycerin, when the packaging article mainly or only contains a lipophilic envelope.

[0311] Thus, the aqueous composition may simply be water. The aqueous composition may optionally comprise at least one polar solvent. Among the polar solvents which can be used in this composition, mention may be made of organic compounds which are liquid at room temperature (25 ° C.) and at least partially miscible with water.

By way of example, there may be mentioned more particularly alkanols such as ethyl alcohol, isopropyl alcohol, aromatic alcohols such as benzyl alcohol, and phenylethyl alcohol, or also polyols or ethers of polyols such as, for example, the monomethyl, monoethyl and monobutyl ethers of ethylene glycol, propylene glycol or its ethers such as, for example, the monomethyl ether of propylene glycol, butylene glycol, dipropylene glycol as well as the alkyl ethers of diethylene glycol, for example monoethyl ether or the diethylene glycol monobutyl ether.

More particularly, if one or more solvents are present, their respective content in the aqueous composition varies from 0.5 to 20% by weight, and preferably from 2 to 10% by weight, relative to the weight of said aqueous composition.

The dilution ratio (expressed by weight) between one or more packaging articles, as defined above, and the composition capable of dissolving the packaging article or articles is preferably between 10/90 and 90/10, and more preferably between 10/90 and 50/50, better still, between 20/80 and 30/70.

When the composition capable of dissolving the article is an aqueous solution of hydrogen peroxide, it preferably has a pH of less than 7. The acid pH guarantees the stability of the hydrogen peroxide in the composition. It can be obtained using acidifying agents such as, for example hydrochloric acid, acetic acid, ethydronic acid, phosphoric acid, lactic acid or boric acid, and it can be conventionally adjusted by adding either basifying agents, such as, for example, ammonia, monoethanolamine, diethanolamine, triethanolamine, isopropanolamine, 1,3-diamino-propane, an alkali (bi) carbonate or ammonium, an organic carbonate such as guanidine carbonate, or alternatively an alkali hydroxide, all of these compounds can of course be taken alone or as a mixture.

The pH of the ready-to-use composition resulting from the mixture of a packaging article, as defined above, with a composition capable of dissolving the envelope of the packaging article is preferably between 7 and 12, and more preferably between 7.5 and 11.

In particular, the ready-to-use composition used in the coloring or lightening process according to the invention is applied to dry or wet keratin fibers.

The ready-to-use composition is advantageously left to stand on the keratin fibers for a period ranging from 1 minute to 1 hour, and more preferably for a period ranging from 5 to 45 minutes.

Then, the keratin fibers are rinsed with water. They can optionally be washed with shampoo, followed by rinsing with water, before being dried or allowed to dry.

The temperature for implementing the coloring or lightening process according to the invention is preferably between room temperature (25 ° C) and 80 ° C, and more preferably between room temperature and 60 ° C .

[0321] Use

The present invention also relates to the use of a solid coloring or lightening composition, as defined above, for dyeing or lightening keratin fibers, and in particular human keratin fibers such as the hair.

The present invention also relates to the use of a packaging article, as defined above, for the coloring or bleaching of keratin fibers, and in particular human keratin fibers such as the hair.

The following examples serve to illustrate the invention without, however, being limiting in nature.

[0325] EXAMPLES

In the examples which follow, all the amounts are indicated in percentage by mass of raw material in the state relative to the total weight of the composition.

The coloring compositions (A) and (B), according to the invention, and the following comparative coloring composition (Al), in powder form and packaged in an envelope of water-soluble paper, were prepared from the ingredients of which the contents are indicated in the tables below (% in g of raw material as is).

[0328] [Tables 1]

A (invention) Al (comparative) B (invention) Toluene-2,5-diamine sulfate 1.99 1.99 0.47 2,4-diaminophenoxyethanol, HCl 0.04 0.04 - 2-methylresorcinol - - 0.03 Resorcinol 0.94 0.94 0.32 m-aminophenol 0.22 0.22 0.01 Sodium percarbonate 42.20 42.20 42.20 Ammonium sulfate 3.61 3.61 3.61 Sodium metabisulfite 1.55 1.55 1.55 Pegelatinized hydroxypropylated starch phosphate (88% active ingredient / ¹ ' 14.45 14.45 14.45 Soy lecithin 14.45 - 14.45 Sodium cocoyl isethionate 1.19 - - Water-soluble paper based on wood pulp 3.36 3.36 3.36 Polyvinylpyrrolidone / Microcrystalline cellulose (1/2) Qsp 100 Qsp 100 Qsp 100

(0329) ⁽¹⁾ : marketed under the trade name Structure ZEA by the company

AKZO NOBEL

Each of the compositions (A), (Al) and (B) obtained previously, was mixed with water in order to obtain the ready-to-use compositions, according to the following proportions per 100g of mixture: - 16.61 g of composition, and

- 43.39 g of water.

The ready-to-use compositions thus obtained were then applied and it was found that the compositions according to the invention had a good level of comfort on application.

The ready-to-use compositions obtained from compositions (A) and (Al) were in particular applied to 15 women usually carrying out oxidation colorations, having a sensitive scalp. They were applied by brush, by Yi head, on dry hair and on the scalp at the rate of 60g per half head.

After a 30-minute break, the hair was rinsed.

The intensities of the sensations felt were evaluated by each woman at different times: before applying the composition, at application, during the pause time at 2, 5, 10, 15, 20 and 30 minutes, and during rinsing.

It was found that composition A according to the invention made it possible to significantly reduce the discomfort (nearly 70% of women found an improvement) compared to the comparative composition Al.

It appears after coloring that the compositions according to the invention make it possible to obtain similar dyeing performances, in particular as large increases and colors as intense as a similar composition without phospholipid (soy lecithin).

These observations were corroborated with spectrocolorimetric measurements:

The ready-to-use compositions (A) and (Al) were applied to locks of natural hair at 90% white, in a bath ratio equal to 5: 1. After a 30-minute break at 27 ° C (thermostatically controlled plate), the locks of hair were rinsed, then washed (Ultra soft chamomile at 0.4 g per g of hair) then rinsed then dried.

The hair coloring was evaluated in the L * a * b * system, with a MINOLTA CM2006 ® spectrophotometer.

In this system, L * represents the intensity, the lower the value of L *, the more intense the coloration obtained. Chromaticity is measured by the values a * and b *, a * representing the red / green axis and b * the yellow / blue axis.

[0341] Determination of the rise

The increase in coloration obtained was evaluated by measuring ΔΕ, which is the variation in color before and after application of the coloration from the formula

[0343] [Math.l]

ΔE = - L /) ² ₊ (a '- a ₀ ψ _s (bb _o *) ² ,

In which L * represents the intensity a * and b *, the chromaticity of the colored hair and Lq * represents the intensity and a ₀ * and b ₀ * the chromaticity of the hair before coloring. The rise in color is all the more important the higher the ΔΕ.

The lower the value of L *, the more intense the coloration obtained.

The values of ΔΕ and L * obtained for each of the coloring compositions, according to the invention (A) and comparative (Al), are indicated in the table below.

[0347]

[Paintings!]

A (invention) Al (comparative) ΔΕ 45.69 45.13 L * 23.2 23.8

As mentioned previously, there was no discomfort noted during the application of the composition according to the invention, nor even during the pause time of the composition. Furthermore, the results obtained above show that the dyeing properties of the coloring composition (A) comprising at least one phospholipid (soy lecithin), prepared according to the present invention, remain equivalent to those of the comparative composition (Al) free of said phospholipid.

[0349] The composition according to the invention therefore makes it possible to reduce the discomfort without altering the coloring performance.

Claims (1)

Claims [Claim 1] Solid composition for coloring or lightening keratin fibers, comprising: at. one or more compounds chosen from chemical oxidizing agents and oxidation bases; b. one or more phospholipids, vs. possibly one or more oxidation couplers. [Claim 2] Composition according to Claim 1, characterized in that the chemical oxidizing agent or agents are chosen from (i) peroxygenated salts, in particular persulfates, perborates, peracids and their precursors, percarbonates of alkali or alkaline earth metals such as sodium carbonate peroxide or called sodium percarbonate; (ii) bromates or ferricyanides of alkali metals, (iii) solid chemical oxidizing agents generating hydrogen peroxide such as urea peroxide and polymer complexes which can release hydrogen peroxide, in particular polyvinylpyrrolidone / H2O2 complexes; (iv) oxidases producing hydrogen peroxide in the presence of an adequate substrate, and mixtures thereof. [Claim 3] Composition according to any one of the preceding claims, characterized in that the total amount of the chemical oxidizing agent (s) ranges from 30 to 55% by weight, and preferably from 35 to 50% by weight, relative to the total weight of the composition solid. [Claim 4] Composition according to any one of the preceding claims, characterized in that the oxidation base or bases are chosen from paraphenylenediamines, bis-phenylalkylenediamines, paraaminophenols, bis-para-aminophenols, ortho-aminophenols, heterocyclic bases , their addition salts, their solvates and their mixtures, and preferably from paraphenylenediamines, and in particular para-toluenediamine, their addition salts, their solvates and their mixtures. [Claim 5] Composition according to any one of the preceding claims, characterized in that the total amount of oxidation base (s) ranges from 0.001 to 20% by weight, preferably from 0.01 to 10% by weight, and more preferably from 0.1 to 7% by weight, relative to the total weight of the solid composition. [Claim 6] Composition according to any one of the preceding claims, characterized in that the phospholipid (s) are chosen from phos- pholipids of plant or animal origin, preferably from phospholipids of plant origin. [Claim 7] Composition according to any one of the preceding claims, characterized in that the phospholipids are chosen from lecithins, preferably from non-hydrogenated lecithins. [Claim 8] Composition according to the preceding claim, characterized in that the phospholipids are chosen from lecithins of plant or animal origin, in particular from lecithins derived from soybeans, sunflower, egg and / or their mixtures, preferably from lecithins of plant origin and preferably among lecithins from soybeans. [Claim 9] Composition according to any one of the preceding claims, characterized in that the total amount of the phospholipid (s) ranges from 0.1 to 30% by weight, preferably from 5 to 25% by weight, and more preferably from 10 to 20% by weight, relative to the total weight of the solid composition. [Claim 10] Composition according to any one of the preceding claims, characterized in that the oxidation coupler (s) are chosen from meta-phenylenediamines, meta-aminophenols, metadiphenols, naphthalene couplers, heterocyclic couplers, their addition salts , their solvates and their mixtures. [Claim 11] Composition according to any one of the preceding claims, characterized in that it also comprises one or more alkaline agents, preferably chosen from silicates and metasilicates, such as metasilicates of alkali metals; carbonates or hydrogen carbonates of alkali or alkaline earth metals, ammonium salts, and mixtures thereof. [Claim 12] Composition according to any one of the preceding claims, characterized in that it is anhydrous. [Claim 13] Ready-to-use composition resulting from the mixture of a solid coloring or lightening composition, as defined in any one of the preceding claims, and a cosmetically acceptable medium. [Claim 14] Packaging item including: (i) an envelope defining at least one cavity, the envelope comprising water-soluble and / or liposoluble fibers, preferably water-soluble fibers; and (ii) a solid coloring or lightening composition as defined in any of claims 1 to 12; it being understood that the solid coloring or lightening composition is in one of the cavities defined by the envelope i). [Claim 15] Process for dyeing or lightening keratin fibers, comprising the following successive steps: - applying to said keratin fibers a ready-to-use composition as defined in claim 13, - let the ready-to-use composition pause on said keratin fibers, - rinse said keratin fibers, and optionally shampoo said keratin fibers, rinse and dry them. [Claim 16] Process for coloring or lightening keratin fibers, comprising the following successive stages: - mixing a packaging article, as defined in claim 14 with a composition capable of dissolving the envelope of said packaging article, - applying the resulting composition to said keratin fibers, - allowing said resulting composition to pause on said keratin fibers, - rinse said keratin fibers, and - optionally shampoo said keratin fibers, rinse and dry them. [Claim 17] Use of a solid coloring or lightening composition, as defined in any one of claims 1 to 13, for the coloring or lightening of keratin fibers, and in particular human keratin fibers such as the hair. [Claim 18] Use of a packaging article, as defined in claim 14, for the coloring or lightening of keratin fibers, and in particular human keratin fibers such as the hair. FRENCH REPUBLIC