WO2015185340A1 - Oxidation dye comprising cationic keratin hydrolysates - Google Patents

Abstract

The present invention relates to a cosmetic agent for dyeing hair, containing at least one cationic keratin hydrolysate, at least one oxidation dye precursor and at least one alkalizing agent, the use of the at least one cationic keratin hydrolysate resulting in improved chroma and in an increased care effect on and increased volume of keratin fibers. The invention also relates to a corresponding packaging unit (kit of parts) and to a method for dyeing keratin fibers. The invention finally relates to the use of at least one cationic keratin hydrolysate for improving the chroma of hues and to the use of the cosmetic agent according to the invention for improving the chroma of hues and/or for increasing the volume of keratin fibers.

Description

 "Oxidation Dyes with Cationic Keratin Hydrolyzates"

The present invention relates to cosmetic agents for coloring keratinic fibers containing cationic keratin hydrolysates.

 Furthermore, the present invention relates to a packaging unit (kit-of-parts), comprising a cosmetic agent according to the invention and an oxidizing agent preparation.

 Moreover, the present invention relates to a process for dyeing keratinic fibers using a cosmetic agent according to the invention and an oxidizing agent preparation.

 Furthermore, the present invention relates to the use of at least one cationic Keratinhydrolysats in cosmetic agents for coloring keratinic fibers to improve the chroma of shades and the use of cosmetic agents according to the invention to improve the chroma of shades and / or to increase the volume of keratinic fibers.

 The change in the shape and color of hair represents an important area of modern cosmetics. Thus, the appearance of the hair can be adapted to current fashion trends as well as to the individual needs of the individual consumer. The fashionable color design of hairstyles or the lamination of gray or white hair with fashionable or natural tones is usually done with color-changing agents. These agents are in addition to a high staining performance additional properties, such as increasing the hair volume, have.

 To provide color-modifying cosmetic agents, especially for the skin or keratin-containing fibers, such as human hair, various dyeing systems are known in the art.

For permanent, intensive colorations with corresponding fastness properties, so-called oxidation colorants are used. Such colorants usually contain oxidation dye precursors, so-called developer components and coupler components. The developer components form the actual dyes under the influence of oxidizing agents or of atmospheric oxygen with one another or with coupling with one or more coupler components. The oxidation dyes are characterized by excellent, long-lasting Staining results. For naturally acting dyeings, however, it is usually necessary to use a mixture of a larger number of oxidation dye precursors; In many cases, direct dyes are still used for shading. If the dyes formed or used directly in the course of color formation have significantly different fastnesses (eg UV stability, perspiration fastness, wash fastness, etc.), a discernible and generally undesirable color shift can occur over time. This phenomenon is more pronounced when staining hairs or haircuts with different degrees of damage. An example of this is long hair, in which the hair tips are usually much more damaged than the freshly regrown hair zones.

 For temporary dyeings usually dyeing or tinting agents are used which contain so-called direct drawers as coloring component. These are dye molecules that grow directly onto the substrate and do not require an oxidative process to form the paint. These dyes include, for example, the henna already known from antiquity for coloring body and hair. These dyeings are generally much more sensitive to shampooing than oxidative dyeings, so that much earlier an often undesirable change in shade or a visible homogeneous color loss occurs.

 Finally, another dyeing process has received much attention. In this method, precursors of the natural hair dye melanin are applied to the substrate, e.g. Hair, applied; These then form naturally-analogous dyes in the course of oxidative processes in the hair. In such processes, for example, 5,6-dihydroxyindoline is used as the dye precursor. In particular, with multiple use of agents with 5,6-dihydroxyindoline, it is possible to restore the natural hair color in persons with graying hair. The coloration can be carried out with atmospheric oxygen as the sole oxidant, so that can be dispensed with further oxidizing agent. In individuals with initially medium blond to brown hair, 5,6-dihydroxyindoline can be used as the sole dye precursor. On the other hand, satisfactory results can often only be achieved for use in persons with originally red and, in particular, dark to black hair color, by using other dye components, in particular special oxidation dye precursors.

 However, the known in the prior art colorants do not always lead to the desired high dyeing performance or have additional desired properties, such as an increase in volume of the hair through the hair coloring on.

The present invention therefore an object of the invention to provide a cosmetic agent for coloring keratinous fibers, which avoids the disadvantages of the prior art or at least attenuates and which in an increased volume of hair and in a improved chroma of color shades, ie in an increased chroma value at the same time increased color depth, results.

 It has now surprisingly been found that the addition of at least one cationic keratin hydrolyzate in cosmetic products for coloring keratinic fibers results in improved chroma of color shades. An indicator of the variety of color nuances is the chroma. The higher the chroma value, the higher the nuance of the nuance. The chroma can be visually enhanced even if the color depth also increases. The addition of the cationic keratin hydrolyzate results in a higher chroma value and increased color depth. Furthermore, the addition of the at least one cationic keratin hydrolyzate leads to an improved volume.

 A first subject of the invention is therefore a cosmetic agent for coloring keratinous fibers, comprising in a cosmetically acceptable carrier

 a) at least one cationic keratin hydrolyzate,

 b) at least one oxidation dye precursor, and

 c) at least one alkalizing agent.

 According to the invention, the term "keratinic fibers or also keratin fibers" is understood to mean furs, wool, feathers and human hair, In the context of the present invention it is particularly preferred if the cosmetic agents are used for dyeing human hair.

 Furthermore, the term "combability" in the context of the present invention means both the combability of the wet fiber and the combability of the dry fiber.

 In addition, the term "fatty alcohols" in the context of the present invention is understood as meaning aliphatic, long-chain, monohydric, primary alcohols which have unbranched hydrocarbon radicals having 6 to 30 carbon atoms The hydrocarbon radicals may be saturated but also mono- or polyunsaturated.

 Finally, the term "fatty acids" in the context of the present invention is understood as meaning aliphatic monocarboxylic acids with unbranched carbon chain which have hydrocarbon radicals having 6 to 30 carbon atoms The hydrocarbon radicals can be either saturated or mono- or polyunsaturated.

The indication of the total amount in relation to the components of the cosmetic product relates in the present case-unless stated otherwise-to the total amount of active substance of the respective component. Furthermore, the indication of the total quantity in relation to the Components of the cosmetic composition - unless otherwise stated - on the total weight of the oxidant-free cosmetic product according to the invention.

 The agents according to the invention contain a cosmetic carrier. According to the invention, the cosmetic carrier is preferably aqueous, alcoholic or aqueous-alcoholic. In the context of the present invention, for example, creams, emulsions, gels or surfactant-containing foaming solutions, such as shampoos, foam aerosols or other preparations which are suitable for use on the hair can be used.

 For the purposes of the invention, an aqueous carrier contains at least 30% by weight, in particular at least 50% by weight, of water, based on the total weight of the cosmetic product.

 For the purposes of the present invention, aqueous-alcoholic carriers are water-containing compositions comprising a C 1 -C 4 alcohol in a total amount of from 3 to 90% by weight, based on the total weight of the cosmetic agent, in particular ethanol or isopropanol.

 The compositions of the invention may additionally contain other organic solvents such as methoxybutanol, ethyldiglycol, 1, 2-propylene glycol, n-propanol, n-butanol, n-butylene glycol, glycerol, diethylene glycol monoethyl ether, and diethylene glycol mono-n-butyl ether. Preference is given to all water-soluble organic solvents, wherein the solvent in a total amount of 0.1 to 30 wt .-%, preferably from 1 to 20 wt .-%, in particular from 2 to 10 wt .-%, based on the total weight of cosmetic agent, is included.

 The cosmetic agent according to the invention contains as the first essential component a) at least one cationic keratin hydrolyzate. The cationic keratin hydrolyzate used in the context of the present invention exhibits sufficient stability with respect to various pH values and strongly oxidizing substances and therefore ensures improved chroma of color shades and a significantly increased volume even under harsh chemical conditions which occur during oxidative hair dyeing the hair coloring.

The keratin hydrolysates on which the cationic keratin hydrolysates according to the invention are based can be prepared from keratin by chemical, in particular alkaline or acid hydrolysis, by enzymatic hydrolysis and / or by a combination of both types of hydrolysis. For enzymatic degradation all hydrolytic enzymes are suitable, such as alkaline proteases. The hydrolysis of keratins usually gives a keratin hydrolyzate having a molecular weight distribution of about 75 daltons to several thousand daltons. Within the scope of the present invention, cationic total hydrolysates of keratins have also proved to be preferred.

 Overviews on the production of keratin hydrolysates are described, for example, by G. Schuster and A. Domsch in Soaps Oils Fette Wachse 108, (1982) 177 and Cosm.Toil, respectively. 99, (1984) 63, by H.W. Steisslinger in Parf.Kosm. 72, (1991) 556 and F. Aurich et al. in Tens.Surf.Det. 29, (1992) 389 appeared.

 According to a preferred embodiment of the present invention, the at least one cationic keratin hydrolyzate is a cationic keratin hydrolyzate of sheep wool.

According to the invention, the at least one cationic keratin hydrolyzate one or more radical (s) of the formula R-N ⁺ _(CH3) 2-CH2-CH (OH) -CH ₂ -X, in which R represents a C ₄ alkyl -2O or a Ci4-2o alkenyl group, X is a heteroatom O, N or S and R is a hydrolyzed keratin residue on. The cationization of the keratin hydrolysates with the above-described radicals can be achieved by reacting the keratin hydrolysates with the corresponding halides of the above formula, the radicals described above being bonded to the keratin hydrolyzate via ether and / or ester and / or amide and / or amine bonds could be.

Particularly good results in terms of improving chroma and increasing the volume are obtained when the at least one cationic keratin hydrolyzate has one or more steardimonium hydroxypropyl group (s). The use of the special cationic keratin hydrolysates results in a significant improvement in the colourfulness of color shades, in particular color shades of fashion shades, as well as in a significant improvement in the volume. In addition, these special cationic Keratinhydrolysate have sufficient stability against the oxidizing agents used in colorants and pH values and can be easily incorporated into the cosmetic products.

According to the invention, the at least one cationic keratin hydrolyzate preferably has a weight-average molecular weight M _{w of} from 100 to 10,000 Da, preferably from 150 to 8,000 Da, preferably from 200 to 6,000 Da, in particular from 300 to 5,000 Da. The weight-average molecular weight M _w can be determined, for example, by gel permeation chromatography (GPC) using polystyrene as an internal standard in accordance with DIN 55672-3

According to a preferred embodiment of the present invention, the at least one cationic keratin hydrolyzate is in a total amount of 0.01 to 5 wt .-%, preferably from 0.05 to 3.75 wt .-%, preferably from 0.1 to 2.5 Wt .-%, more preferably from 0.3 to 2 wt .-%, in particular from 0.4 to 1, 3 wt .-%, based on the total weight of the cosmetic composition containing. The use of the at least one cationic keratin hydrolyzate in the abovementioned amounts results in a positive influence on the chroma of color shades as well as on the volume of keratinic fibers treated with the cosmetic agents of the invention. In addition, the use of the abovementioned amounts of the at least one cationic keratin hydrolyzate avoids a negative influence on further ingredients and the stability of the cosmetic compositions according to the invention.

 The oxidation colorants according to the invention contain as second essential constituent b) at least one oxidation dye precursor. Due to their reaction behavior, oxidation dye precursors can be divided into two categories, so-called developer components and coupler components.

 Developer components can form the actual dye with themselves. They may therefore be included as sole compounds in the cosmetic composition according to the invention. Thus, in a preferred embodiment, the cosmetic compositions of the present invention contain at least one type of oxidation dye precursor of the developer type. However, it can also be provided in the context of the present invention that the cosmetic compositions according to the invention comprise at least one coupler type oxidation dye precursor. Particularly good results with respect to the coloring of keratinous fibers are obtained when the cosmetic compositions according to the invention comprise at least one developer type oxidation dye precursor and at least one coupler type oxidation dye precursor.

 The developer and coupler components are usually used in free form. In the case of substances having amino groups, however, it may be preferable to use their salt form, in particular in the form of the hydrochlorides and hydrobromides or the sulfates.

 According to the invention, cosmetic agents are preferred which contain the developer and / or coupler components in a total amount of from 0.001 to 10% by weight, preferably from 0.01 to 8% by weight, preferably from 0.1 to 5% by weight. , in particular from 0.5 to 3 wt .-%, based on the total weight of the cosmetic composition.

 In a further preferred embodiment, the agent according to the invention is therefore characterized in that it comprises an oxidation dye precursor of the developer and / or coupler type in a total amount of from 0.001 to 10% by weight, preferably from 0.01 to 8% by weight, preferably from 0 , 1 to 5 wt .-%, in particular from 0.5 to 3 wt .-%, based on the total weight of the cosmetic composition contains.

Suitable oxidation dye precursors of the developer type are, for example, p-phenylenediamine and its derivatives. Preferred p-phenylenediamines are selected from one or more compounds of the group which is formed from p-phenylenediamine, p-toluenediamine, 2-chloro-p-phenylenediamine, 2,3-dimethyl-p-phenylenediamine, 2,6-dimethyl p-phenylenediamine, N, N-bis (2-hydroxy-ethyl) -p-phenylenediamine, 2- (2-hydroxyethyl) -p-phenylenediamine, 2- (1,2-dihydroxyethyl) -p- phenylenediamine, N- (2-hydroxypropyl) -p-phenylenediamine, N- (4'-aminophenyl) -p-phenylenediamine, 2-methoxymethyl-p-phenylenediamine, N-phenyl-p-phenylenediamine, 2- (2-hydroxyethyloxy) -p-phenylenediamine and N- (4-amino-3-methylphenyl) -N- [3- (1H-imidazol-1-yl) propyl] amine and their physiologically acceptable salts.

 It may further be preferred according to the invention to use as developer component compounds which contain at least two aromatic nuclei which are substituted by amino and / or hydroxyl groups. Preferred binuclear developer components are selected from N, N'-bis (2-hydroxyethyl) -N, N'-bis (4'-aminophenyl) -1,3-diaminopropan-2-ol, N, N'-bis- (4-aminophenyl) - 1, 4-diazacycloheptane, bis (2-hydroxy-5-aminophenyl) methane and their physiologically acceptable salts.

 Furthermore, it may be preferred according to the invention to use as the developer component a p-aminophenol derivative or one of its physiologically tolerable salts. Preferred p-aminophenols are p-aminophenol, N-methyl-p-aminophenol, 4-amino-3-methylphenol, 4-amino-2-aminomethylphenol, 4-amino-2- (1, 2-dihydroxyethyl) phenol, 4-amino-2- (diethylaminomethyl) phenol and their physiologically acceptable salts.

 Furthermore, the developer component may be selected from o-aminophenol and its derivatives, preferably from 2-amino-4-methylphenol, 2-amino-5-methylphenol, 2-amino-4-chlorophenol and / or their physiologically acceptable salts.

 Furthermore, the developer component may be selected from heterocyclic developer components, such as pyrimidine derivatives, pyrazole derivatives, pyrazolopyrimidine derivatives or their physiologically acceptable salts. Preferred pyrimidine derivatives are 2,4,5,6-tetraaminopyrimidine, 4-hydroxy-2,5,6-triaminopyrimidine and their physiologically acceptable salts. A preferred pyrazole derivative is 4,5-diamino-1- (2-hydroxyethyl) pyrazole and its physiologically acceptable salts. As pyrazolopyrimidines in particular pyrazolo [1, 5-a] pyrimidines are preferred.

 Preferred oxidation dye precursors of the developer type are selected from the group formed from p-phenylenediamine, p-toluenediamine, 2- (2-hydroxyethyl) -p-phenylenediamine, 2- (1, 2-dihydroxyethyl) -p-phenylenediamine, N, N-bis- (2-hydroxyethyl) -p-phenylenediamine, 2-

Methoxymethyl-p-phenylenediamine, N- (4-amino-3-methylphenyl) -N- [3- (1 H -imidazol-1-yl) -propyl] amine, N, N'-bis (2-hydroxy-ethyl ) -N, N'-bis (4-aminophenyl) -1, 3-diamino-propan-2-ol, bis (2-hydroxy-5-aminophenyl) methane, 1, 3-bis (2 , 5-diaminophenoxy) -propan-2-ol, N, N'-bis (4-aminophenyl) -1, 4-diazacycloheptane, 1, 10-bis- (2,5-diaminophenyl) -1, 4 , 7,10-tetraoxadecane, p-aminophenol, 4-amino-3-methylphenol, 4-amino-2-amino-methylphenol, 4-amino-2- (1, 2-dihydroxyethyl) phenol and 4-amino-2- (diethylaminomethyl) phenol, 4,5-diamino-1- (2-hydroxyethyl) pyrazole, 2,4,5,6-tetraaminopyrimidine, 4- Hydroxy-2,5,6-triaminopyrimidine, 2-hydroxy-4,5,6-triaminopyrimidine or the physiologically acceptable salts of these compounds.

 Particularly preferred developer components are p-toluenediamine, 2- (2-hydroxyethyl) -p-phenylenediamine, 2-methoxymethyl-p-phenylenediamine, N- (4-amino-3-methylphenyl) -N- [3- (1H -imidazol-1-yl) propyl] amine, and / or 4,5-diamino-1- (2-hydroxyethyl) pyrazole and their physiologically acceptable salts.

 According to a further preferred embodiment of the present invention, the cosmetic agent according to the invention as oxidation dye precursor additionally contains, in addition to at least one developer component, additionally at least one coupler component. As coupler components m-phenylenediamine derivatives, naphthols, resorcinol and resorcinol derivatives, pyrazolones and m-aminophenol derivatives are generally used.

 Coupler components preferred according to the invention are selected from

 (A) m-Aminophenol and its derivatives, in particular 3-aminophenol, 5-amino-2-methylphenol, 3-amino-2-chloro-6-methylphenol, 5-amino-4-chloro-2-methylphenol, 5- ( 2'-hydroxyethyl) amino-2-methylphenol and 2,4-dichloro-3-aminophenol,

 (B) o-aminophenol and its derivatives, such as 2-amino-5-ethylphenol,

 (C) m-diaminobenzene and its derivatives such as 2,4-diaminophenoxyethanol, 1,3-bis (2 ', 4'-diaminophenoxy) -propane, 1-methoxy-2-amino-4- (2 '-hydroxyethylamino) benzene, 2,6-bis (2'-hydroxyethylamino) -1-methylbenzene, 2 - ({3 - [(2-hydroxyethyl) amino] -4-methoxy-5-methylphenyl} amino) ethanol and 2 - ({3 - [(2-hydroxyethyl) amino] -2-methoxy-5-methylphenyl} -amino) ethanol,

 (D) o-diaminobenzene and its derivatives,

 (E) di- or trihydroxybenzene derivatives, in particular resorcinol, 2-chlororesorcinol, 4-chlororesorcinol, 2-methylresorcinol and 1, 2,4-trihydroxybenzene,

 (F) pyridine derivatives, in particular 3-amino-2-methylamino-6-methoxypyridine, 2,6-diaminopyridine, 2,6-dihydroxy-3,4-dimethylpyridine, 2-amino-3-hydroxypyridine and 3,5-diamino 2,6-dimethoxy-pyridine,

 (G) naphthalene derivatives, wiel-naphthol and 2-methyl-1-naphthol,

 (H) morpholine derivatives, such as 6-hydroxybenzomorpholine,

 (I) quinoxaline derivatives,

 (J) pyrazole derivatives such as 1-phenyl-3-methylpyrazol-5-one,

 (K) Indole derivatives, such as 6-hydroxyindole,

 (L) pyrimidine derivatives or

(M) Methylenedioxybenzene derivatives such as 1- (2'-hydroxyethyl) amino-3,4-methylenedioxybenzene and their physiologically acceptable salts. Coupler components preferred according to the invention are selected from the group formed from 3-aminophenol, 5-amino-2-methylphenol, 3-amino-2-chloro-6-methylphenol, 2-hydroxy-4-aminophenoxyethanol, 5-amino-4 -chloro-2-methylphenol, 5- (2-hydroxyethyl) amino-2-methylphenol, 2,4-dichloro-3-aminophenol, 2-aminophenol, 3-phenylenediamine, 2- (2,4-diaminophenoxy) ethanol, 1,3-bis (2,4-diaminophenoxy) propane, 1-methoxy-2-amino-4- (2-hydroxyethylamino) benzene, 1,3-bis (2,4-diaminophenyl) propane, 2.6 Bis (2'-hydroxyethylamino) -1-methylbenzene, 2 - ({3 - [(2-hydroxyethyl) amino] -4-methoxy-5-methylphenyl} amino) ethanol, 2 - ({3 - [(2- Hydroxyethyl) amino] -2-methoxy-5-methylphenyl} amino) ethanol, 2- ({3 - [(2-hydroxyethyl) amino] -4,5-dimethylphenyl} amino) ethanol, 2- [3-morpholine 4-ylphenyl) amino] ethanol, 3-amino-4- (2-methoxyethoxy) -5-methylphenylamine, 1-amino-3-bis- (2-hydroxyethyl) aminobenzene, resorcinol, 2-methylresorcinol, 4-chlororesorcinol, 1, 2,4-trihydroxybenzene, 2-amino-3-hydroxypyridine, 3-amino-2-methylam ino-6-methoxypyridine, 2,6-dihydroxy-3,4-dimethylpyridine, 3,5-diamino-2,6-dimethoxypyridine, 1-phenyl-3-methylpyrazol-5-one, 1-naphthol, 1, 5 Dihydroxynaphthalene, 2J-dihydroxynaphthalene, 1-dihydroxynaphthalene, 1,8-dihydroxynaphthalene, 4-hydroxyindole, 6-hydroxyindole, 7-hydroxyindole, 4-hydroxyindoline, 6-hydroxyindoline, 7-hydroxyindoline or the physiologically acceptable salts of the aforementioned compounds.

 Particularly preferred coupler components according to the invention are resorcinol, 2-methylresorcinol, 5-amino-2-methylphenol, 3-aminophenol, 2- (2,4-diaminophenoxy) ethanol, 1,3-bis- (2,4-diamino-phenoxy) propane , 1-Methoxy-2-amino-4- (2'-hydroxyethylamino) benzene, 2-amino-3-hydroxypyridine, 2,6-dihydroxy-3,4-dimethylpyridine, 1, 5-dihydroxynaphthalene, 2J-dihydroxynaphthalene and 1 -Naphthol and their physiologically acceptable salts.

In a further embodiment, the cosmetic compositions according to the invention are characterized in that they contain as oxidation dye precursor at least one developer and / or coupler component from the group which is formed from p-phenylenediamine, p-toluenediamine, 2- (2-hydroxyethyl) -p phenylenediamine, 2- (1,2-dihydroxyethyl) -p-phenylenediamine, N, N-bis (2-hydroxyethyl) -p-phenylenediamine, 2-methoxymethyl-p-phenylenediamine, N- (4-amino-3-) methylphenyl) -N- [3- (1H-imidazol-1-yl) propyl] amine, N, N'-bis (2-hydroxyethyl) -N, N'-bis (4-aminophenyl) -1, 3-diamino-propan-2-ol, bis (2-hydroxy-5-aminophenyl) methane, 1, 3-bis- (2,5-diaminophenoxy) -propan-2-ol, N, N'-bis- (4-aminophenyl) -1, 4-diazacycloheptane, 1, 10-bis (2,5-diaminophenyl) -1, 4J, 10-tetraoxadecane, p-aminophenol, 4-amino-3-methylphenol, 4-amino 2-aminomethylphenol, 4-amino-2- (1,2-dihydroxy-ethyl) phenol and 4-amino-2- (diethylaminomethyl) phenol, 4,5-diamino-1- (2-hydroxyethyl) pyrazole, 2 , 4,5,6-tetraaminopyrimidine, 4-H ydroxy-2,5,6-triaminopyrimidine, 2-hydroxy-4,5,6-triaminopyrimidine or the physiologically tolerated salts of these compounds, and optionally additionally contains at least one coupler component from the group formed from 3-aminophenol, 5- Amino-2-methylphenol, 3-amino-2-chloro-6-methylphenol, 2-hydroxy-4-aminophenoxyethanol, 5-amino-4-chloro-2-methylphenol, 5- (2-hydroxyethyl) amino-2- methylphenol, 2,4-dichloro-3-aminophenol, 2-aminophenol, 3-phenylenediamine, 2- (2,4-diaminophenoxy) ethanol, 1,3-bis (2,4-diaminophenoxy) -propane, 1-methoxy-2- amino-4- (2-hydroxyethylamino) benzene, 1, 3-bis (2,4-diaminophenyl) propane, 2,6-bis (2'-hydroxyethylamino) -1-methylbenzene, 2 - ({3- [ (2-hydroxyethyl) amino] -4-methoxy-5-methylphenyl} amino) ethanol, 2 - ({3 - [(2-hydroxyethyl) amino] -2-methoxy-5-methylphenyl} amino) ethanol, 2 - ({3 - [(2-hydroxyethyl) amino] -4,5-dimethylphenyl} amino) ethanol, 2- [3-morpholin-4-yl-phenyl) -amino] -ethanol, 3-amino-4- (2-methoxyethoxy ) -5-methylphenylamine, 1-amino-3-bis- (2-hydroxyethyl) aminobenzene, resorcinol, 2-methylresorcinol, 4-chlororesorcinol, 1, 2,4-trihydroxybenzene, 2-amino-3-hydroxypyridine, 3-amino -2-methylamino-6-methoxypyridine, 2,6-dihydroxy-3,4-dimethylpyridine, 3,5-diamino-2,6-dimethoxypyridine, 1-phenyl-3-methylpyrazol-5-one, 1-naphthol, 1 , 5-Dihydroxynaphthalene, 2J-dihydroxynaphthalene, 1, 7-dihydroxynaphthalene, 1, 8-dihydroxynaphthalene, 4-hydroxyindole, 6-hydroxyindole, 7-hydro xyindole, 4-hydroxyindoline, 6-hydroxyindoline, 7-hydroxyindoline or the physiologically acceptable salts of the abovementioned compounds.

 Developer-type and coupler-type oxidation dye precursors are preferably used in certain combinations. In the context of the present invention, the following combinations have proved to be particularly advantageous: p-toluenediamine / resorcinol; p-toluenediamine / 2-methylresorcinol; p-toluenediamine / 5-amino-2-methylphenol; p-toluenediamine / 3-aminophenol; p-toluylenediamine / 2- (2,4-diaminophenoxy) ethanol; p-toluenediamine / 1,3-bis (2,4-diaminophenoxy) propane; p-toluenediamine / 1-methoxy-2-amino-4- (2-hydroxyethylamino) benzene; p-toluenediamine / 2-amino-3-hydroxypyridine; p-toluenediamine / 1-naphthol; 2- (2-hydroxyethyl) -p-phenylenediamine / resorcinol; 2- (2-hydroxyethyl) -p-phenylenediamine / 2-methylresorcinol; 2- (2-hydroxyethyl) -p-phenylenediamine / 5-amino-2-methylphenol; 2- (2-hydroxyethyl) -p-phenylenediamine / 3-aminophenol; 2- (2-hydroxyethyl) -p-phenylenediamine / 2- (2,4-diaminophenoxy) ethanol; 2- (2-hydroxyethyl) -p-phenylenediamine / 1, 3-bis (2,4-diaminophenoxy) propane; 2- (2-hydroxyethyl) -p-phenylenediamine / 1-methoxy-2-amino-4- (2-hydroxyethylamino) benzene; 2- (2-hydroxyethyl) -p-phenylenediamine / 2-amino-3-hydroxypyridine; 2- (2-hydroxyethyl) -p-phenylenediamine / 1-naphthol; 2-methoxymethyl-p-phenylenediamine / resorcinol; 2-methoxymethyl-p-phenylenediamine / 2-methylresorcinol;

2-methoxymethyl-p-phenylenediamine / 5-amino-2-methylphenol; 2-methoxymethyl-p-phenylenediamine /

3-aminophenol; 2-methoxymethyl-p-phenylenediamine / 2- (2,4-diaminophenoxy) ethanol; 2-methoxymethyl-p-phenylenediamine / 1,3-bis (2,4-diaminophenoxy) propane; 2-methoxymethyl-p-phenylenediamine / 1-methoxy-2-amino-4- (2-hydroxyethylamino) benzene; 2-methoxymethyl-p-phenylenediamine / 2-amino-3-hydroxypyridine; 2-methoxymethyl-p-phenylenediamine / 1-naphthol; N- (4-amino-3-methylphenyl) -N- [3- (1 H -imidazol-1-yl) propyl] amine / resorcinol; N- (4-amino-3-methylphenyl) -N- [3- (1 H -imidazol-1-yl) propyl] amine / 2-methylresorcinol; N- (4-amino-3-methylphenyl) -N- [3- (1 H -imidazol-1-yl) propyl] amine / 5-amino-2-methylphenol; N- (4-amino-3-methylphenyl) -N- [3- (1 H -imidazol-1-yl) propyl] amine / 3-aminophenol; N- (4-amino-3-methylphenyl) -N- [3- (1 H -imidazol-1-yl) propyl] amine / 2- (2,4-diamino-phenoxy) -ethanol; N- (4-amino-3-methylphenyl) -N- [3- (1 H -imidazol-1-yl) propyl] amine / 1, 3-bis (2,4-) diaminophenoxy) propane; N- (4-amino-3-methylphenyl) -N- [3- (1 H -imidazol-1-yl) propyl] amine / 1 -methoxy-2-amino-4- (2-hydroxyethylamino) benzene; N- (4-amino-3-methylphenyl) -N- [3- (1 H -imidazol-1-yl) propyl] amine / 2-amino-3-hydroxypyridine; N- (4-amino-3-methylphenyl) -N- [3- (1 H -imidazol-1-yl) propyl] amine / 1-naphthol; 4,5-diamino-1- (2-hydroxyethyl) pyrazole / resorcinol; 4,5-diamino-1- (2-hydroxyethyl) pyrazole / 2-methylresorcinol; 4,5-diamino-1- (2-hydroxyethyl) pyrazole / 5-amino-2-methylphenol; 4,5-diamino-1- (2-hydroxyethyl) pyrazole / 3-aminophenol; 4,5-diamino-1- (2-hydroxyethyl) pyrazole / 2- (2,4-diaminophenoxy) ethanol; 4,5-diamino-1- (2-hydroxyethyl) pyrazole / 1,3-bis (2,4-diaminophenoxy) propane; 4,5-diamino-1- (2-hydroxyethyl) pyrazole / 1-methoxy-2-amino-4- (2-hydroxyethylamino) benzene; 4,5-diamino-1- (2-hydroxyethyl) pyrazole / 2-amino-3-hydroxypyridine; 4,5-diamino-1- (2-hydroxyethyl) pyrazole / 1-naphthol. However, it is also possible within the scope of the present invention, in addition to the aforementioned combinations, to additionally use further oxidation dye precursors in the cosmetic compositions according to the invention.

 In order to obtain a balanced and subtle nuance formation, it can also be provided in the context of the present invention that the cosmetic compositions according to the invention additionally contain at least one substantive dye. Direct dyes are dyes that are applied directly to the hair and do not require an oxidative process to form the dye. Direct dyes are usually nitrophenylenediamines, nitroaminophenols, azo dyes, anthraquinones or indophenols.

 Direct dyes can be subdivided into anionic, cationic and nonionic substantive dyes.

Preferred anionic substantive dyes are those referred to as Acid Yellow 1, Yellow 10, Acid Yellow 23, Acid Yellow 36, Acid Orange 7, Acid Red 33, Acid Red 52, Pigment Red 57: 1, Acid Blue 7, Acid Green 50, Acid Violet 43, Acid Black 1, Acid Black 52 and tetrabromophenol blue known compounds. Preferred cationic substantive dyes are cationic triphenylmethane dyes, such as Basic Blue 7, Basic Blue 26, Basic Violet 2 and Basic Violet 14, aromatic systems which are substituted by a quaternary nitrogen group, such as Basic Yellow 57, Basic Red 76, Basic Blue 99, Basic Brown 16 and Basic Brown 17 and HC Blue 16, as well as Basic Yellow 87, Basic Orange 31 and Basic Red 51. Preferred nonionic substantive dyes are HC Yellow 2, HC Yellow 4, HC Yellow 5, HC Yellow 6, HC Yellow 12, HC Orange 1, Disperse Orange 3, HC Red 1, HC Red 3, HC Red 10, HC Red 1 1. HC Red 13, HC Red BN, HC Blue 2, HC Blue 11, HC Blue 12, Disperse Blue 3, HC Violet 1, Disperse Violet 1, Disperse Violet 4, Disperse Black 9, and 1, 4-Diamino-2-nitrobenzene , 2-amino-4-nitrophenol, 1, 4-bis (2-hydroxyethyl) amino-2-nitrobenzene, 3-nitro-4- (2-hydroxyethyl) aminophenol, 2- (2-hydroxyethyl) amino 4,6-dinitrophenol, 4 - [(2-hydroxyethyl) amino] -3-nitro-1-methylbenzene, 1-amino-4- (2-hydroxyethyl) amino-5-chloro-2-nitrobenzene, 4- Amino-3-nitrophenol, 1- (2'-ureidoethyl) amino-4-nitrobenzene, 2 - [(4-amino-2-nitrobenzene) phenyl) amino] benzoic acid, 6-nitro-1,2,3,4-tetrahydroquinoxaline, 2-hydroxy-1,4-naphthoquinone, picramic acid and its salts, 2-amino-6-chloro-4-nitrophenol, 4-ethylamino 3-nitrobenzoic acid and 2-chloro-6-ethylamino-4-nitrophenol.

 Furthermore, as direct dyes also occurring in nature dyes are used, as for example in henna red, henna neutral, henna black, chamomile flower, sandalwood, black tea, walnut, buckthorn bark, sage, blue wood, madder root, catechu and alkano root are included.

 Preferably, the cosmetic composition according to the invention contains the substantive dyes in a total amount of 0.001 to 10 wt .-%, preferably from 0.01 to 8 wt .-%, preferably from 0.1 to 5 wt .-%, in particular of 0.5 to 3 wt .-%, based on the total weight of the cosmetic product.

 As a third essential component c), the cosmetic compositions according to the invention comprise at least one alkalizing agent, which may be inorganic or organic. Cosmetic compositions in the context of the present invention generally have a basic pH, in particular between pH 8.0 and pH 12. These pHs are required to ensure opening of the outer cuticle (cuticle) and to allow penetration of the oxidation dye precursors and / or the oxidizing agent into the hair.

 Preferred inorganic alkalizing agents are selected from the group consisting of ammonia or ammonium hydroxide, ie aqueous solutions of ammonia, sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, sodium phosphate, potassium phosphate, sodium silicate, potassium silicate, sodium carbonate and potassium carbonate and mixtures thereof. Ammonia or ammonium hydroxide is a particularly preferred alkalizing agent. Particular preference is given to containing ammonia in a total amount of from 0.1 to 20% by weight, preferably from 0.5 to 10% by weight, in particular from 1 to 7% by weight, based on the total weight of the cosmetic composition.

Preferred organic alkalizing agents are selected from at least one alkanolamine. Alkanolamines which are preferred according to the invention are selected from alkanolamines of primary, secondary or tertiary amines having a C 2 -C 6 -alkyl basic body which carries at least one hydroxyl group. Particularly preferred alkanolamines are selected from the group consisting of 2-aminoethane-1-ol (monoethanolamine), 3-aminopropan-1-ol, 4-aminobutan-1-ol, 5-aminopentan-1-ol, 1- Aminopropan-2-ol (monoisopropanolamine), 1-aminobutan-2-ol, 1-aminopentan-2-ol, 1-aminopentan-3-ol, 1-aminopentan-4-ol, 2-amino-2-methyl-propanol , 2-Amino-2-methylbutanol, 3-amino-2-methylpropan-1-ol, 1-amino-2-methylpropan-2-ol, 3-aminopropane-1,2-diol, 2-amino-2-methylpropane 1, 3-diol, 2-amino-2-ethyl-1,3-propanediol, Ν, Ν-dimethyl-ethanolamine, triethanolamine, Diethanolamine and triisopropanolamine. Very particularly preferred alkanolamines according to the invention are selected from the group of 2-aminoethane-1-ol (monoethanolamine), 2-amino-2-methyl-propan-1-ol, 2-amino-2-methyl-propane-1, 3 diol and triethanolamine. Particularly preferred cosmetic agents according to the invention contain monoethanolamine as alkanolamine. Preferably, the at least one alkanolamine in a total amount of 0.05 to 10 wt .-%, preferably from 0.5 to 6 wt .-%, in particular from 1 to 3 wt .-%, based on the total weight of the cosmetic composition, contain.

 Further inventively preferred organic alkalizing agents are selected from basic amino acids, more preferably selected from the group which is formed from L-arginine, D-arginine, D / L-arginine, L-lysine, D-lysine, D / L-lysine and Mixtures thereof. Basic amino acids which are particularly preferred according to the invention are selected from L-arginine, D-arginine and D / L-arginine. Preferred cosmetic agents according to the invention comprise at least one alkalizing agent other than alkanolamines and ammonia in a total amount of from 0.05 to 5% by weight, in particular from 0.5 to 3% by weight, based on the total weight of the cosmetic agent.

 In a particularly preferred embodiment, the cosmetic compositions according to the invention comprise a mixture of ammonia and at least one alkanolamine and optionally at least one further alkalizing agent other than alkanolamines and ammonia.

The pH of the cosmetic compositions according to the invention, measured at 22 ° C., is preferably from 8 to 13, preferably from 9.5 to 12, preferably from 10 to 11, 5, in particular from 10.5 to 11.

 In a preferred embodiment, the cosmetic compositions according to the invention are in the form of a creamy oil-in-water emulsion.

 In this context, it may be preferred in the context of the present invention if the cosmetic compositions according to the invention present as oil-in-water emulsion comprise at least one linear saturated alkanol having 12 to 30 carbon atoms, in particular 16 to 22 carbon atoms, in a total amount of 2 to 20 wt .-%, in particular from 5 to 15 wt .-%, based on the total weight of the cosmetic composition. Cetyl alcohol, stearyl alcohol, arachidyl alcohol, behenyl alcohol and lanolin alcohol or mixtures of these alcohols, such as are obtainable in the industrial hydrogenation of vegetable and animal fatty acids, and mixtures of these alkanols are particularly suitable in the context of the present invention. Particularly suitable according to the invention, the mixture cetearyl alcohol.

The cosmetic compositions according to the invention which are present as an oil-in-water emulsion preferably comprise at least one partial ester of a polyol having 2 to 6 carbon atoms and linear saturated fatty acids having 12 to 30, in particular 14 to 22, carbon atoms, the partial esters be hydroxylated, in a total amount of 0.5 to 8 wt .-%, in particular from 3 to 6 wt .-%, based on the total weight of the cosmetic composition. Such partial esters are in particular the mono- and diesters of glycerol or the monoesters of propylene glycol or the mono- or diesters of ethylene glycol or the mono-, di-, tri- and tetraesters of pentaerythritol, each with linear saturated C 12 -C 30 -carboxylic acids which hydroxylates in particular those with palmitic and stearic acid, the sorbitan mono-, di- or triesters of linear saturated C 12 -C 20 -carboxylic acids which may be hydroxylated, in particular those of myristic, palmitic, stearic or mixtures of these fatty acids and the like Methyl glucose mono- and diesters of linear saturated C 12 -C 20 carboxylic acids which may be hydroxylated.

 In the context of the present invention, it may be provided that the cosmetic compositions according to the invention as oil-in-water emulsion comprise at least one polyol partial ester selected from glycerol monostearate, glycerol monopalmitate, glyceryl distearate, glycerol dipalmitate, ethylene glycol monostearate, ethylene glycol monopalmitate, ethylene glycol distearate, ethylene glycol dipalmitate and mixtures thereof, in particular mixtures of glycerol monostearate, glycerol monopalmitate, glyceryl distearate and glycerol dipalmitate in a total amount of from 0.5 to 8% by weight, in particular from 3 to 6% by weight, based on the total weight of the cosmetic composition.

 Furthermore, it can be provided according to the invention that the cosmetic compositions according to the invention contain at least one surfactant. Surfactants for the purposes of the present invention are amphiphilic (bifunctional) compounds which consist of at least one hydrophobic and at least one hydrophilic moiety. The hydrophobic residue is preferably a hydrocarbon chain of 8 to 28 carbon atoms, which may be saturated or unsaturated, linear or branched. Most preferably, this Cs-C28 alkyl chain is linear. The hydrophilic moiety is preferably a polyethylene oxide group having at least 2 EO units or an acid group. A basic property of surfactants and emulsifiers is oriented adsorption at interfaces as well as aggregation into micelles and the formation of lyotropic phases.

In a preferred embodiment, the present invention as cosmetic oil-in-water emulsion therefore contain at least one ethoxylated nonionic surfactant in a total amount of 0.5 to 6 wt .-%, in particular from 1 to 4 wt .-%, based on the total weight of the cosmetic product. It has proved to be particularly advantageous if the ethoxylated nonionic surfactant has an HLB value above 10, preferably above 13. For this purpose, it is necessary that the nonionic surfactant has a sufficiently high degree of ethoxylation. In this connection, the cosmetic agent according to the invention therefore contains, as the ethoxylated nonionic surfactant, at least one ethoxylated surfactant having at least 12 ethylene oxide units. In addition to the correspondingly ethoxylated fatty alcohols, in particular lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, arachyl alcohol and behenyl alcohol, are According to the invention in particular the addition products of 20 to 60 moles of ethylene oxide to castor oil and hydrogenated castor oil particularly suitable. The at least one ethoxylated nonionic surfactant is preferably selected from surfactants having the INCI name ceteth-12, steareth-12, ceteareth-12, ceteth-20, steareth-20, ceteareth-20, ceteth-30, steareth-30, ceteareth- 30, Oleth-30, Ceteareth-50, PEG-40 Hydrogenated Castor Oil and PEG-60 Hydrogenated Castor Oil and mixtures of these substances, more preferably selected from Ceteth-20, Steareth-20, Ceteareth-20, Ceteth-30, Steareth- 30 and Ceteareth-30.

 According to a further preferred embodiment of the present invention, the cosmetic compositions according to the invention present as an oil-in-water emulsion contain at least one anionic surfactant in a total amount of from 0.5 to 6% by weight, in particular from 1 to 4% by weight. , based on the total weight of the cosmetic product. As anionic surfactants, the following compounds are particularly preferred in the context of the present invention

Alkyl sulfates and alkyl polyglycol ether sulfates of the formula R-O (CH 2 -CH 2 O) _x -OSO 3 H, in which R is a preferably linear alkyl group having 8 to 30 carbon atoms and x = 0 or 1 to 12,

- Salts of linear and branched fatty acids having 8 to 30 carbon atoms, in particular the sodium or potassium salts, also referred to as soaps, and

- Ethercarbonsäuren the formula R-0- (CH2-CH20) _x -CH2-COOH, in which R is a linear alkyl group having 8 to 30 carbon atoms and x = 0 or 1 to 16.

In a particularly preferred embodiment, the cosmetic compositions according to the invention present as oil-in-water emulsion contain at least one anionic surfactant selected from alkyl sulfates and alkylpolyglycol ether sulfates of the formula R-O (CH 2 -CH 2 O) _x -OSO 3 H in which R is a preferably linear alkyl group 8 to 30 carbon atoms and x = 0 or 1 to 12 salts, linear and branched fatty acids having 8 to 30 carbon atoms, in particular the sodium or potassium salts, ether carboxylic acids of formula R-0- (CH2-CH20) _x -CH 2 COOH, in which R is a linear alkyl group having 8 to 30 carbon atoms and x = 0 or 1 to 16, and mixtures of these anionic surfactants in a total amount of 0.5 to 6 wt .-%, in particular from 1 to 4 wt .-%, based on the total weight of the cosmetic product.

In the context of the present invention, it is further preferred if the cosmetic compositions according to the invention present as oil-in-water emulsion comprise at least one cationic or amphoteric polymer selected from the compounds having the INCI name "Polyquaternium" in a total amount of 0.05 up to 2% by weight, in particular from 0.1 to 0.5% by weight, based on the total weight of the cosmetic agent, with particular preference being given to polyquaternium-4, polyquaternium-5, polyquaternium-6, polyquaternium-7, Polyquaternium-10, Polyquaternium-1 1, Polyquaternium-22, Polyquaternium-37 and Polyquaternium-39 used; most preferred are Polyquaternium-22, Polyquaternium-37 and Polyquaternium-39, Polyquaternium-39 is most preferred.

 In a further preferred embodiment, the cosmetic compositions according to the invention present as oil-in-water emulsion comprise at least one polymeric thickener in a total amount of from 0.05 to 2% by weight, in particular from 0.1 to 1% by weight on the total weight of the cosmetic product.

 In the context of the present invention, thickening agents have proved to be particularly advantageous which comprise at least one monomer of the acrylic or methacrylic acid type and derivatives thereof. A polymer which is very particularly preferred according to the invention is a copolymer of two or more monomers selected from acrylic acid, methacrylic acid and their esters with C 1 -C 4 -alkyl groups. A polymer which is very particularly preferred according to the invention is the copolymer known from the INCI name Acrylates Copolymer of two or more monomers selected from acrylic acid, methacrylic acid and their esters with C 1 -C 4 -alkyl groups. Another very particularly preferred polymer according to the invention is carbomer, a cross-linked acrylic acid homopolymer. Further very particularly preferred polymers according to the invention are methacrylic acid-free copolymers of acrylic acid and acrylic acid C 1 -C 4 esters.

 In a further preferred embodiment, the cosmetic compositions according to the invention present as an oil-in-water emulsion comprise at least one polymeric thickener selected from carbomer in a total amount of from 0.05 to 2% by weight, in particular from 0.1 to 1% by weight .-%, based on the total weight of the cosmetic product.

 According to a particularly preferred embodiment of the present invention, the present invention as cosmetic oil-in-water emulsion - based on the total weight of the cosmetic products -

Cetearyl alcohol in a total amount of 2 to 20 wt .-%, in particular from 5 to 15 wt .-%, further

 Mixtures of glycerol monostearate, glycerol monopalmitate, glyceryl distearate and glycerol dipalmitate in a total amount of 0.5 to 8 wt.%, Preferably 3 to 6 wt

 at least one ethoxylated nonionic surfactant selected from ceteth-20, steareth-20, ceteareth-20, ceteth-30, steareth-30 and ceteareth-30, in a total amount of 0.5 to 6% by weight, in particular of 1 to 4 wt .-%, and

at least one anionic surfactant selected from alkyl sulfates and alkyl polyglycol ether sulfates of the formula R-O (CH 2 -CH 2 O) x -OS 3 H, in which R is a preferably linear alkyl group of 8 to 30 carbon atoms and x = 0 or 1 to 12, salts linear and branched Fatty acids with 8 to 30 carbon atoms, in particular their sodium or potassium salts, ether carboxylic acids of the formula R-O- (CH ₂ -CH ₂ 0) x-CH ₂ -COOH, in which R is a linear alkyl group having 8 to 30 carbon atoms and x = 0 or 1 to 16 is, as well as mixtures of these anionic surfactants, in a total amount of 0.5 to 6 wt .-%, in particular from 1 to 4 wt .-%.

 Oxidative staining compositions may also be prepared directly prior to use from two or more separately packaged compositions. This is particularly useful for the separation of incompatible ingredients to avoid premature reaction. Separation into multicomponent systems is particularly preferred where incompatibilities of the ingredients are to be expected or feared. The oxidative coloring composition in these cases is prepared by the consumer just prior to use by mixing the components. In the context of the present invention, this procedure is particularly preferred for oxidative colorants in which the cosmetic agent according to the invention is initially present separately from an oxidizing agent preparation containing at least one oxidizing agent.

 Another object of the present invention is therefore a packaging unit (kit-of-parts), comprising - made up separately - a) at least one container (C1) containing a cosmetic composition according to the invention, and

 b) at least one container (C2) containing an oxidizing agent preparation, which in a cosmetically acceptable carrier at least one oxidizing agent in a total amount of 0.5 to 7 wt .-%, preferably from 1 to 7 wt .-%, in particular from 3 to 7 wt .-%, in particular based on the total weight of the oxidizing agent preparation, and at least one acid.

 The use of the at least one cationic keratin hydrolyzate in combination with certain amounts of oxidizing agent surprisingly results in a significantly increased volume when using the aforementioned packaging unit for coloring keratinic fibers.

 For the purposes of the present invention, the term "container" is understood to mean an envelope which is present in the form of an optionally resealable bottle, tube, can, sachet, sachet or similar wrappings However, these are enclosures made of glass or plastic.

The oxidizing agents in the present invention are different from atmospheric oxygen. As the oxidizing agent, hydrogen peroxide and its solid addition products to organic and inorganic compounds can be used. As solid addition products according to the invention, in particular the addition products of urea, melamine, polyvinylpyrrolidinone and sodium borate in question. Hydrogen peroxide and / or one of its solid addition products of organic or inorganic compounds are particularly preferred as the oxidizing agent.

 A particularly preferred embodiment of the present invention is therefore characterized in that as the oxidizing agent hydrogen peroxide in a total amount of 0.5 to 7 wt .-%, preferably from 1 to 7 wt .-%, in particular from 3 to 7 wt .-%, in particular based on the total weight of the oxidizing agent preparation. The calculation of the total amount refers to 100% H2O2.

 The oxidizing agent preparations may further comprise water in a total amount of from 40 to 98% by weight, in particular from 70 to 91% by weight, based on the total weight of the oxidizing agent preparation.

 According to a preferred embodiment of the present invention, the oxidizing agent preparations contain at least one linear saturated alkanol having 12 to 30 carbon atoms, in particular 16 to 22 carbon atoms in a total amount of 0.1 to 10 wt .-%, preferably from 0.5 to 5 wt. -%, In particular from 1 to 4 wt .-%, based on the total weight of the oxidizing agent preparation. Preference is given in particular to cetyl alcohol, stearyl alcohol, arachidyl alcohol, behenyl alcohol and lanolin alcohol or mixtures of these alcohols, such as are obtainable in the industrial hydrogenation of vegetable and animal fatty acids, and mixtures of these alkanols. Most preferably, the mixture is cetearyl alcohol.

 In a further preferred embodiment of the present invention, the oxidizing agent preparations contain at least one ethoxylated nonionic surfactant, which is preferably selected from surfactants having the INCI name ceteth-12, steareth-12, ceteareth-12, ceteth-20, steareth-20, ceteareth- 20, Ceteth-30, Steareth-30, Ceteareth-30, Oleth-30, Ceteareth-50, PEG-40 Hydrogenated Castor Oil and PEG-60 Hydrogenated Castor Oil and mixtures of these substances, more preferably selected from Ceteth-20, Steareth- 20, ceteareth-20, ceteth-30, steareth-30 and ceteareth-30 in a total amount of 0.1 to 10 wt .-%, preferably from 0.5 to 5 wt .-%, in particular from 1 to 4 wt. %, based on the total weight of the oxidizing agent preparation.

In the context of the present invention, it can also be provided that the oxidizing agent preparations contain at least one cationic surfactant in a total amount of from 0.05 to 2% by weight, preferably from 0.1 to 1% by weight, in particular from 0, From 3 to 0.7% by weight, based on the total weight of the oxidizing agent preparation.

Preferred cationic surfactants have the formula (Tkat1 -1) R1

 R4-N-R2 A

 R3

 (Tkat1-1).

 In the formula (Tkat1-1), R 1, R 2, R 3 and R 4 each independently represent hydrogen, a methyl group, a phenyl group, a benzyl group or a saturated, branched or unbranched alkyl group having a chain length of 8 to 30 carbon atoms, which may optionally be substituted by one or more hydroxy groups. A is a physiologically acceptable anion, for example halides such as chloride or bromide and methosulfates. Examples of preferred compounds of the formula (Tkat1-1) are lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, cetyltrimethylammonium bromide, cetyltrimethylammonium methosulfate, dicetyldimethylammonium chloride, tricetylmethylammonium chloride, stearyltrimethylammonium chloride, distearyldimethylammonium chloride, lauryldimethylbenzylammonium chloride, behenyltrimethylammonium chloride, behenyltrimethylammonium bromide and behenyltrimethylammonium methosulfate.

 Further preferred cationic surfactants have the formula (Tkat1 -2)

R2

 R1 N L-X-R4 A

 R3

 (Tkat1-2).

 Here, the radicals R1, R2 and R3 are each independently and may be the same or different. The radicals R1, R2 and R3 mean:

 a branched or unbranched alkyl radical having 1 to 4 carbon atoms which may contain at least one hydroxyl group, or

 a saturated or unsaturated, branched or unbranched or cyclic saturated or unsaturated alkyl radical having from 6 to 30 carbon atoms which may contain at least one hydroxyl group, or

 an aryl or alkaryl radical, for example phenyl or benzyl,

 - the radical (--X - R4), with the proviso that at most 2 of the radicals R1, R2 or R3 can stand for this radical, where X represents the following radicals:

 1) - (CH 2) n - with n = 1 to 20, preferably n = 1 to 10, in particular n = 1 to 5, or

2) - (CH 2 -CHR 5 -O) n - with n = 1 to 200, preferably 1 to 100, preferably 1 to 50, in particular 1 to 20, with R 5 in the meaning of hydrogen, methyl or ethyl, or a hydroxyalkyl group having one to four carbon atoms, which may be branched or unbranched, and which contains at least one and at most 3 hydroxyl groups, such as -CHOH, -CHCH2OH, -CH2CHOH, -COHCHOH,

-CHOHCOH, -CHCHOHCH3, -CH2COHCH3, -CH2CHOHCH2-, -C (CH ₂ OH) 2, -CH2CHOHCH2OH, -CH2CH2CHOH, -CH2COHCH3 and Hydroxybutylreste, wherein the binding of -X- to R4 of the free valence of the relevant carbon atom emanating .

 and the rest R4 for:

 1) R6-0-CO-, wherein R6 is a saturated or unsaturated, branched or unbranched or cyclic saturated or unsaturated alkyl radical having 6 to 30 carbon atoms, which may contain at least one hydroxy group, and which optionally further with 1 to 100 ethylene oxide units and / or 1 to 100 propylene oxide units can be ethoxylated, or

 2) R 7-CO-, in which R 7 is a saturated or unsaturated, branched or unbranched or cyclic saturated or unsaturated alkyl radical having 6 to 30 carbon atoms, which may contain at least one hydroxy group, and which may furthermore be admixed with 1 to 100 ethylene oxide units and / or or 1 to 100 propylene oxide units can be ethoxylated.

In the above formula (Tkat1 -2) A is a physiologically acceptable organic or inorganic anion and is defined here as representative of all structures also described below. The anion of all described cationic compounds is selected from the halide ions, fluoride, chloride, bromide, iodide, sulfates of the general formula RSO3 ^" , wherein R has the meaning of saturated or unsaturated alkyl radicals having 1 to 4 carbon atoms, or anionic radicals of organic acids such as maleate , Fumarate, oxalate, tartrate, citrate, lactate or acetate.

 In the context of the present invention, particularly preferred cationic surfactants of the formula (Tkatl - 2) contain the radical - (X - R 4) at least once to three times.

Such products are marketed under the trademarks Rewoquat ^®, Stepantex® ^®, Dehyquart® ^{®, ®} and Armocare® Akypoquat ^®. The products Armocare ^® VGH-70, Dehyquart ^® F-75, Dehyquart ^® C-4046, Dehyquart ^® L80, Dehyquart ^® F-30, Dehyquart ^® AU-35, Rewoquat ^® WE18, Rewoquat ^® WE38 DPG, Stepantex ^® VS 90 and Akypoquat ^® 131 are examples of these esterquats.

(Tkat1 -2.1 ) R8 entspricht in seiner Bedeutung dem zuvor definierten Rest R7. Further compounds of the formula (Tkat1 -2) which are particularly preferred according to the invention include the formula (Tkat1-2.1), the cationic betaine esters.

(Tkat1 -2.1) R8 corresponds in its meaning to the previously defined radical R7.

Particularly preferred are the esterquats with tradenames Armocare ^® VGH-70 are, as well as Dehyquart ^® F-75, Dehyquart ^® L80, Stepantex ^® VS 90 and Akypoquat ^® 131st

 Another group are quaternary imidazoline compounds. The formula (Tkat2) shown below shows the structure of these compounds

 The radicals R independently of one another each represent a saturated or unsaturated, linear or branched hydrocarbon radical having a chain length of 8 to 30 carbon atoms. The preferred compounds of the formula (Tkat2) contain for R the same hydrocarbon radical. The chain length of the radicals R is preferably 12 to 21 carbon atoms. A is an anion as previously described. Examples according to the invention are obtainable, for example, under the INCI names Quaternium-27, Quaternium-72, Quaternium-83 and Quaternium-91. Quaternium-91 is particularly preferred according to the invention.

 Another preferred cationic surfactant is an amidoamine and / or a cationized amidoamine having the following structural formula (Tkat3):

R1 - NH - (CH ₂₎ n - N ⁺ R ² R ³ R ⁴ A (Tkat3)

wherein R 1 is an acyl or alkyl radical having 6 to 30 C atoms, which may be branched or unbranched, saturated or unsaturated, and wherein the acyl radical and / or the alkyl radical may contain at least one OH group, and

 R2, R3 and R4 are each independently

 1) hydrogen or

 2) an alkyl radical having 1 to 4 carbon atoms, which may be identical or different, saturated or unsaturated, or

3) a branched or unbranched hydroxyalkyl group having one to four carbon atoms having at least one and at most three hydroxy groups, for example -CH ₂ OH, -CH ₂ CH ₂ OH, -CHOHCHOH, -CH ₂ CHOHCH 3, -CH (CH ₂ OH) 2, -COH (CH ₂ OH) ₂ , -CH 2 CHOHCH 2 OH, -CH 2 CH 2 CH 2 OH and hydroxybutyl radicals, and

 A is an anion as previously described and

n is an integer between 1 and 10. The alkylamidoamines can be present as such and converted by protonation in a correspondingly acidic solution into a quaternary compound. According to the invention, the cationic alkylamidoamines are preferred. Examples of such used in this invention commercial products are Witcamine ^® 100, Incromine ^® BB, Mackine ^® 401 and other Mackine ^® grades, Adogen ^® S18V, and as a permanent cationic aminoamines: Rewoquat ^® RTM 50, Empigen ^® CSC, Swanol ^® Lanoquat DES-50 , Rewoquat ^® UTM 50, Schercoquat® ^® BAS ^® Lexquat AMG-BEO, or Incroquat ^® behenyl HE.

According to a particularly preferred embodiment of the present invention, the oxidizing agent preparations contain, based on the total weight of the oxidizing agent preparations,

- At least one linear saturated alkanol having 12 to 30 carbon atoms in a total amount of 0.1 to 10 wt .-%, preferably from 0.5 to 5 wt .-%, in particular from 1 to 4 wt .-%, further

 at least one ethoxylated nonionic surfactant, which is preferably selected from surfactants having the INCI name ceteth-12, steareth-12, ceteareth-12, ceteth-20, steareth-20, ceteareth-20, ceteth-30, steareth-30, Ceteareth-30, Oleth-30, Ceteareth-50, PEG-40 Hydrogenated Castor Oil and PEG-60 Hydrogenated Castor Oil and mixtures of these substances, more preferably selected from Ceteth-20, Steareth-20, Ceteareth-20, Ceteth-30, Steareth-30 and ceteareth-30, in a total amount of 0.1 to 10 wt .-%, preferably from 0.5 to 5 wt .-%, in particular from 1 to 4 wt .-%, and

 - At least one cationic surfactant, which is preferably selected from at least one cationic surfactant of the formula (Tkat1 -1), in a total amount of 0.05 to 2 wt .-%, preferably from 0.1 to 1 wt .-%, in particular from 0.3 to 0.7% by weight.

 The oxidizing agent preparations according to the invention also contain at least one acid. Preferred acids are selected from dipicolinic acid, edible acids such as citric acid, acetic acid, malic acid, lactic acid and tartaric acid, dilute mineral acids such as hydrochloric acid, phosphoric acid and sulfuric acid, and mixtures thereof. The oxidizing agent preparations preferably have a pH in the range from 2 to 5, in particular from 3 to 4, on.

 For the preparation of oxidative dyeing compositions from the packaging unit (kit-of-parts) according to the invention, the cosmetic agent according to the invention in the container C1 is mixed with the oxidizing agent preparation in the container C2 or vice versa.

Furthermore, it can be particularly advantageous according to the invention if the packaging unit contains at least one further hair treatment agent in an additional container, in particular a conditioning agent preparation. This conditioner composition advantageously contains at least one conditioning agent selected from the group of cationic polymers, silicone derivatives and oils. In addition, the packaging unit application aids, such as Combs, brushes, Applicetten or brush, personal protective clothing, especially disposable gloves, and optionally include instructions for use. An applicette is understood to mean a broad brush, on whose end of the stem there is a tip, which allows and simplifies the division of fiber bundles out of the total amount of fibers.

 With regard to the cosmetic agent according to the invention in the container C1 and the oxidizing agent preparation in the container C2, what has been said about the cosmetic agents according to the invention applies mutatis mutandis.

 A further subject of the present invention is a process for coloring keratinic fibers, which process comprises the following process steps:

 a) providing a cosmetic agent (M1) according to the invention,

 b) providing an oxidizing agent preparation (M2) comprising, in a cosmetically acceptable carrier, at least one oxidizing agent in a total amount of from 0.5 to 7% by weight, preferably from 1 to 7% by weight, in particular from 3 to 7% by weight. %, in particular based on the total weight of the oxidizing agent preparation, and at least one acid, c) mixing the cosmetic agent (M1) according to the invention and the oxidizing agent preparation (M2),

 d) applying the mixture obtained in step c) to the keratinic fibers and leaving this mixture on the keratinic fibers for a time of 10 to 60 minutes, preferably from 20 to 45 minutes, at room temperature and / or at least 30 ° C,

 e) rinsing the keratinic fibers with water and / or a cleansing composition for 1 to 5 minutes, and

 f) optionally applying an aftertreatment agent to the keratinic fibers and rinsing after a time of 1 to 10 minutes.

 The inventive method for coloring keratinic fibers using a specific cationic keratin hydrolyzate in combination with a certain amount of oxidizing agent results in improved chroma, i. H. increased chroma values with simultaneously increased color intensity, as well as in a significantly improved volume.

Room temperature is to be understood in the context of the present invention, the ambient temperature. The effect of the dyeing and / or whitening preparation can be enhanced by external heat, for example by means of a heat hood. The preferred exposure time of the dyeing and / or whitening preparation to the keratinic fiber is 10 to 60 minutes, preferably 20 to 45 minutes. After completion of the exposure time, the remaining colorant is washed out of the keratinic fibers by means of a cleaning preparation, which preferably contains at least one cationic and / or anionic and / or nonionic surfactant, and / or water. Possibly the process is repeated with another agent. After washing, the keratinic fibers are optionally rinsed with an aftertreatment agent, such as a conditioner, and dried with a towel or a hot air blower. The application of the dyeing preparation is usually done by hand by the user. Personal protective clothing is preferably worn here, in particular suitable protective gloves, for example made of plastic or latex for single use (disposable gloves) and optionally an apron. But it is also possible to apply the colorants with an application aid on the keratinic fibers.

 Regarding the cosmetic agent M1 according to the invention, the oxidizing agent preparation M2 and further preferred embodiments of the method according to the invention, what has been said about the cosmetic agents according to the invention and the packaging unit according to the invention applies mutatis mutandis.

 In addition, a further subject of the present invention is the use of at least one cationic keratin hydrolyzate in cosmetic agents for dyeing keratinic fibers to improve the chroma of color shades. The use of a cationic keratin hydrolyzate results in an improvement in the chroma of shades, in particular shades of fashion shades.

 With regard to further preferred embodiments of the use according to the invention, what has been said about the cosmetic agents according to the invention and the packaging unit according to the invention applies mutatis mutandis.

 Finally, another object of the present invention is the use of a cosmetic composition comprising, in a cosmetically acceptable carrier, at least one cationic keratin hydrolyzate, at least one oxidation dye precursor and at least one alkalizing agent to improve the chroma of color shades and / or to increase the volume of keratinic fibers.

 With regard to further preferred embodiments of the use according to the invention, what has been said about the cosmetic agents according to the invention and the packaging unit according to the invention applies mutatis mutandis.

The following examples are intended to illustrate preferred embodiments of the invention without, however, limiting it. Examples:

1. recipes

 Compositions of the cosmetic agents used (oil-in-water emulsions, all amounts in% by weight). The at least one cationic keratin hydrolyzate used in the following formulations preferably has one or more steardimonium hydroxypropyl group (s).

 The fat base was melted together at 80 ° C and dispersed with a portion of the amount of water. Subsequently, the remaining recipe ingredients were incorporated with stirring in order. It was then made up to 100% by weight with water and the formulation was stirred cold. The formulation V1 is a comparative formulation not according to the invention without cationized keratin hydrolyzate. The formulations E1 and E2 are examples according to the invention.

Oxidizing agent preparation 01 (all amounts in% by weight) Raw material 01

 Na benzoate 0.04

 Dipicolinic acid 0.10

 Disodium pyrophosphate 0.10

 Potassium hydroxide 50% 0.19

 Propanediol-1, 2 0.50

 1-hydroxyethane-1, 1-diphosphonic acid 60% 0.25

 Emulgade F -

Ceteareth-20 1, 0

 Cetearyl Alcohol 3,4

 Hydrogen peroxide 50% 12

 Parfum Liquidum 2.0

 Water demineralized ad 100

 Emulgade F (INCI name: Cetearyl alcohol, PEG-40 castor oil, sodium cetearyl sulfate, BASF) 2. Chroma and color depth

 For the preparation of the oxidative colorants for the determination of the chroma and color depth, the cosmetic agents V1 and E1 and E2 were each mixed in a weight ratio of 1: 1 with the above oxidizing agent preparation 01.

 The oxidative dyes prepared in this manner were each applied in defined amounts (4 g oxidative dye per 1 g Yakhaar) to Yakhaar streaks (12 streaks per oxidative stain) and remained on the hair tresses for 30 minutes at 32 ° C , Subsequently, the remaining funds were rinsed out of the hair strands with lukewarm water for 2 minutes each, the strands were first dried with a towel and then dry-blown (colorations: bright red).

 All tresses were measured with a colorimeter from Datacolor, type Spectraflash 450. The values dC and dl_ used for the assessment of the chroma and color depth result from the L * a * b color measurement values measured at the respective tress as follows:

dC = [(ai-ao) ² + (bi-bo) ² ] ^{/ 2} or dL = U-Lo

ao, bo and Lo are in each case the mean values of the color measurement values of the untreated yakhaar strands determined from the 12 measurements, while a 1, bi and Li represent the average values of the color readings after the oxidative staining of the hair strands with the respective oxidative colorant.

An indicator of the variety of colorations is the chroma. The higher the dC value, the higher the nuance of the nuance. The chroma can be visually enhanced even if the color depth, ie the dL value, also increases. Table 1 shows the dC values and the dL values for the colorations using the cosmetic agents V1, E1 and E2. The colorations with the cosmetic compositions E1 and E2 according to the invention which comprise at least one cationic keratin hydrolyzate contained in a total amount of 0.5 wt .-% and 1, 3 wt .-%, compared to the coloration without cationic Keratinhydrolysat (V1) improved chroma. The chroma can be further increased by using a larger amount of the cationic keratin hydrolyzate (cf colorant E2 + 01).

3. Increasing the volume of dyed strands of hair

 For the preparation of the oxidative colorants for determining the volume, the cosmetic agents V1 and E1 and E2 were each mixed in a weight ratio of 1: 1 with the above oxidizing agent preparation 01.

 12 strands of naturally European hair (Kerling International, lot # 05/2011, N11 1, length 12 cm, weight 1 g, Backnang, Germany) were washed with an aqueous sodium lauryl ether sulfate solution (3% active substance content in the solution). The tresses were air-dried and stored for 24 h at 25 ° C and 25% relative humidity. After soaking these strands for 5 minutes in water their combability was determined (reference value).

 For the dyeings, 12 strands of naturally European hair (Kerling International, lot # 05/201 1, N 11 1, length 12 cm, weight 1 g, Backnang, Germany) were used per oxidative dye. For this purpose, in each case 4 g of the previously prepared oxidative colorants per 1 g of hair strand were applied. After streaks were dyed at 32 ° C for 30 minutes, they were rinsed with water for 2 minutes and air-dried (colorations: bright red).

 The measurement of combability was carried out as follows:

 Before the measurement, each tress was moistened with combing with a hard rubber crest with fine teeth (Hercules Sägemann, Hamburg Germany) for 2 seconds with water. After 3 combing operations have been performed, the combing force is measured during a further 10 combing operations, whereby the respective hair strand rotates slowly during the combing process. The resulting measurements are compared using the following statistical tests embedded in Statistica 10.0 software (StatSoft Inc., USA):

 Shapiro-Wilks test (test for normal distribution)

 Outlier test after Grubbs

 Bartlett test (test for homoscedasticity of variances)

 Univariant significance test

 Newman-Keuls test (determination of significant differences)

 Kruskal-Wallis test (parameter-free analysis of rank variance)

Siegel-Castellan test (multiple comparisons of p-values by rank, nonparametric) The change in the combing force dK in percent can be calculated using the formula dK = [(Ko-K) / Ko] * 100. Ko here is the average of the combing power for the unstained hair strands and K is the mean value for the hair strands treated with the respective oxidative colorant.

The volume of the hair strands is the higher, the greater the combing force applied and thus the lower or the more negative the change in the combing force. Table 3 shows the dK values for the colorations using the cosmetic agents V1, E1 and E2. The colorations with the cosmetic compositions E1 and E2 according to the invention which comprise at least one cationic keratin hydrolyzate in a total amount of 0.5% by weight and 1.3% by weight, respectively, show, in comparison to a coloration without cationic keratin hydrolyzate (V1). a higher combing power and thus a significantly higher volume. The volume can be further increased by using a larger amount of the cationic keratin hydrolyzate (cf colorant E2 + 01.

Claims

claims: 1. Cosmetic agent for coloring keratinous fibers, containing in a cosmetically acceptable carrier  a) at least one cationic keratin hydrolyzate,  b) at least one oxidation dye precursor, and  c) at least one alkalizing agent. 2. Cosmetic composition according to claim 1, characterized in that the at least one cationic keratin hydrolyzate is a cationic keratin hydrolyzate of sheep wool. 3. Cosmetic composition according to one of claims 1 or 2, characterized in that the at least one cationic keratin hydrolyzate one or more radical (s) of the formula R - N ⁺ (CH ₃ ) 2-CH ₂ -CH (OH) -CH ₂ - XR in which R is a Ci ₄ -2o-alkyl or a Ci ₄ -2o-alkenyl group, X is a heteroatom O, N or S and R is a hydrolyzed keratin residue. 4. Cosmetic composition according to one of the preceding claims, characterized in that the at least one cationic Keratinhydrolysat one or more Steardimoniumhydroxypropylgruppe (s). 5. Cosmetic composition according to one of the preceding claims, characterized in that the at least one cationic Keratinhydrolysat a weight average molecular weight M _w of 100 to 10,000 Da, preferably from 150 to 8,000 Da, preferably from 200 to 6,000 Da, in particular from 300 to 5,000 Da , having. 6. Cosmetic composition according to one of the preceding claims, characterized in that the at least one cationic Keratinhydrolysat in a total amount of 0.1 to 20 wt .-%, preferably from 0.01 to 5 wt .-%, preferably from 0.05 up to 3.75% by weight, preferably from 0.1 to 2.5% by weight, more preferably from 0.3 to 2% by weight, in particular from 0.4 to 1.3% by weight, based on the total weight of the cosmetic product. 7. Cosmetic composition according to one of the preceding claims, characterized in that the oxidation dye precursor of the developer and / or coupler type in a total amount of 0.001 to 10 wt .-%, preferably from 0.01 to 8 wt .-%, preferably from 0, 1 to 5 wt .-%, in particular from 0.5 to 3 wt .-%, based on the total weight of the cosmetic agent, is included. 8. Cosmetic composition according to one of the preceding claims, characterized in that the alkalizing agent is a mixture of ammonia and at least one alkanolamine and optionally at least one other of alkanolamines and ammonia different alkalizing agent. 9. Cosmetic composition according to one of the preceding claims, characterized in that it has a pH, measured at 22 ° C, from 8 to 13, preferably 9.5 to 12, preferably 10 to 11, 5, in particular 10.5 to 1 1 has. 10. Cosmetic composition according to one of the preceding claims, characterized in that it is in the form of a cream-shaped oil-in-water emulsion. 11. Packing unit (kit-of-parts), comprising - made up separately - a) at least one container (C1) containing a cosmetic agent according to one of claims 1 to 10, and  b) at least one container (C2) containing an oxidizing agent preparation, which in a cosmetically acceptable carrier at least one oxidizing agent in a total amount of 0.5 to 7 wt .-%, preferably from 1 to 7 wt .-%, in particular from 3 to 7 wt .-%, in particular based on the total weight of the oxidizing agent preparation, and at least one acid. 12. A method for coloring keratinic fibers, the method comprising the following method steps:  a) providing a cosmetic agent (M1) according to any one of claims 1 to 10, b) providing in a cosmetically acceptable carrier at least one oxidizing agent in a total amount of 0.5 to 7 wt .-%, preferably, an oxidizing agent preparation (M2) from 1 to 7% by weight, in particular from 3 to 7% by weight, in particular based on the total weight of the oxidizing agent preparation, and at least one acid,  c) mixing the cosmetic agent (M1) according to one of claims 1 to 10 and the oxidizing agent preparation (M2),  d) applying the mixture obtained in step c) to the keratinic fibers and leaving this mixture on the keratinic fibers for a time of 10 to 60 minutes, preferably from 20 to 45 minutes, at room temperature and / or at least 30 ° C, e) rinsing the keratinic fibers with water and / or a cleansing composition for 1 to 5 minutes, and f) optionally applying an aftertreatment agent to the keratinic fibers and rinsing after a time of 1 to 10 minutes. 13. Use of at least one cationic keratin hydrolyzate in cosmetic compositions for dyeing keratinic fibers to improve the chroma of color nuances. 14. Use of a cosmetic composition comprising, in a cosmetically acceptable carrier, at least one cationic keratin hydrolyzate, at least one oxidation dye precursor and at least one alkalizing agent to improve the chroma of shades and / or to increase the volume of keratinic fibers.