Agent for oxidative dyeing of keratin fibres, containing isatin and at least one defined polymer

Abstract

The present invention relates to an agent for oxidatively dyeing keratin fibres, in particular human hair, containing, in a cosmetic carrier, (a) isatin and (b) at least one polymer from the group consisting of xanthan gum, algin, carrageenan, cetyl hydroxyethylcellulose, carboxymethyl cellulose, tragacanth, gum karaya, gum ghatti, agar, chitin, chitosan, gum arabic, gellan gum, guar gum, tamarind seed flour, carob gum, and the physiologically acceptable salts thereof.

Description

[0001]Henkel AG & Co. KGaA 2021P00425WO Agent for the oxidative coloring of keratin fibers, containing isatin and at least one specific polymer. The present invention relates to cosmetic agents for the oxidative coloring of keratin fibers, which contain isatin (a) and at least one polymer (b) selected from the group consisting of xanthan gum, algin, carrageenan, cetyl hydroxyethyl cellulose, carboxymethylcellulose, tragacanth, karaya gum, ghatti gum, agar, chitin, chitosan, gum arabic, gellan gum, guar gum, tamarind gum, locust bean gum, and physiologically acceptable salts thereof. A further subject matter is a process for the oxidative coloring of keratin fibers, in which an agent as described above is applied to the keratin fibers and rinsed out again after a contact time.For the provision of color-changing cosmetic products, particularly for keratinous fibers such as hair, the expert is familiar with various coloring systems depending on the coloring requirements. So-called oxidation dyes are used for permanent, intensive colorings with corresponding fastness properties. Such dyes typically contain oxidation dye precursors, so-called developer components and coupler components, which, under the influence of oxidizing agents such as hydrogen peroxide, form the actual dyes. These oxidation dyes are characterized by excellent, long-lasting coloring results. The oxidation dye precursors (developer and coupler) themselves are not colored; rather, the formation of the actual dyes only occurs during application through contact between the oxidation dye precursors and the oxidizing agent (hydrogen peroxide).In a chemical reaction, the developers used as oxidation dye precursors (such as p-phenylenediamine or its derivatives) are first oxidatively converted by hydrogen peroxide into a reactive intermediate, also called quinone imine or quinone diimine. This intermediate then reacts with the couplers in an oxidative coupling reaction to form the respective dye. With oxidative dyes, hair can be colored in both intense fashion shades and natural tones by selecting the appropriate developer and coupler components. A major application for oxidative dyes is the coloring of gray hair in a natural shade that resembles the hair color the user had in their younger years.A classic combination for creating oxidative colorings in the brown to dark blonde range is the use of developers based on the base compound 1,4-diaminobenzene (para-phenylenediamine) and couplers with a resorcinol structure (1,3-dihydroxybenzene). These oxidation dyes have been in use for decades. Although they are intended only for extracorporeal application on keratin fibers such as scalp hair, eyelashes, and eyebrows, contact of the dye with the scalp cannot be completely avoided during application. To ensure the highest possible product safety for customers, commercially available oxidation dye precursors are continuously tested for their physiological compatibility, for example, by the Scientific Committee on Consumer Products (SCCP), an advisory body of the European Commission.It is known that some oxidation dye precursors, particularly some para-phenylenediamine-type oxidation bases, may have a certain sensitization potential. Therefore, customers are advised to conduct a preliminary skin test with a small amount of the dye before applying the dye to hair to rule out allergic reactions during or after the dyeing process. In addition to skin sensitization, other physiological effects are also monitored. Resorcinol, 4-chlororesorcinol, and 2-methylresorcinol are common oxidation dye precursors with a 1,3-dihydroxybenzene parent structure. In its latest opinion of March 2021, the SCCP concluded that the use of resorcinol in oxidative hair dyes is considered safe at a resorcinol concentration of up to 1.25% by weight in the ready-to-use mixture. The SCCP mentioned that resorcinol has antithyroid effects.While a clear exposure level required for such an effect cannot be derived from the available human studies, most of these studies indicate a relatively much higher exposure than is the case with cosmetics. In order to address the concerns of some consumers regarding product safety, the aim of the present invention was to provide an agent for the oxidative coloring of keratin fibers, in particular human hair, which can cover a broad color spectrum, in particular a natural color palette with cool natural tones and warm natural tones, as well as a gold color series resulting in colorations with high fastness properties without compromising product safety. In particular, coloring in these natural shades should be possible without the use of recorcinol-type couplers.Many users dye their hair the same shade for decades and do not want a sudden, overtly visible change in their usual hair color. For these users, it is therefore essential to be able to replace the usual resorcinol-containing hair dye with a new, resorcinol-free product without a shift in shade. A central challenge of the present application was therefore to find a new, resorcinol-free hair dye whose color output and color result match the resorcinol-containing dye used previously as closely as possible.Surprisingly, it has now been found that this task can be excellently solved by an oxidative coloring agent which contains isatin (a) and at least one polymer (b) from the group consisting of xanthan, algin, carrageenan, cetyl hydroxyethyl cellulose, carboxymethylcellulose, tragacanth, karaya gum, ghatti gum, agar, chitin, chitosan, gum arabic, gellan, guar, tamarind kernel flour and their physiologically acceptable salts. A first subject of the present invention is an agent for the oxidative coloring of keratinic fibers, in particular human hair, comprising in a cosmetic carrier (a) isatin and (b) at least one polymer from the group consisting of xanthan, algin, carrageenan, cetyl hydroxyethyl cellulose, carboxymethylcellulose, tragacanth, karaya gum, ghatti gum, agar, chitin, chitosan, gum arabic, gellan, guar, tamarind seed flour, locust bean gum and their physiologically acceptable salts.The work leading to this invention has shown that the oxidative coloring of hair using isatin (a) leads to very intensive colors with outstanding fastness properties if the coloring agent also contains a specific polymer from the above-mentioned group (b). Keratin fibers Keratin fibers are understood to mean, in principle, all animal hair, e.g. wool, horsehair, angora hair, furs, feathers and products or textiles made therefrom. Preferably, however, the keratin fibers are human hair. Agents for oxidative coloring The term “agent for oxidative coloring” of keratin fibers used in the invention refers to oxidative colorants. Oxidative colorants contain oxidation dye precursors, so-called developers and couplers. Developers and couplers diffuse separately into the keratin fibers and, under the influence of an alkalizing agent (e.g.B. ammonia) and an oxidizing agent (hydrogen peroxide) react chemically with each other to form the actual dyes. Depending on the amount of oxidizing agent used, the keratin fiber is lightened to a greater or lesser extent during the coloring process, as the oxidizing agent not only initiates the dye formation process of developers and couplers, but also oxidatively destroys the hair's own pigments (melanins). Depending on the amounts of oxidation dye precursors and oxidizing agent used, oxidative coloring can therefore primarily be a coloring (with a high dye content) or primarily a lightening (with a high oxidizing agent content). In the latter case, the oxidation dye precursors are used primarily to shade the lightening result.The agents according to the invention contain the constituents essential to the invention in a cosmetic carrier, preferably in a suitable aqueous, alcoholic, or aqueous-alcoholic carrier. For the purpose of hair coloring, such carriers are, for example, creams, emulsions, gels, or surfactant-containing foaming solutions, such as shampoos, foam aerosols, foam formulations, or other preparations suitable for application to the hair. The oxidative colorant described above is a ready-to-use colorant which, in this form containing constituents (a) and (b), is applied to the keratin fibers for application. Isatin The oxidative colorant contains isatin (a) as the first constituent essential to the invention. Isatin is the compound of the formula (ISA), which can alternatively also be referred to as 2,3-indoline-dione or 2,3-dioxoindoline. Isatin has the CAS number 91-56-5. With a view to optimally achieving the objective of the invention, isatin (a) is preferably present in the agent according to the invention in certain quantity ranges. Particularly good results were obtained when the agent contained, based on the total weight of the agent, 0.001 to 10 wt.%, preferably 0.01 to 5 wt.%, more preferably 0.1 to 3.5 wt.%, and most preferably 0.15 to 2.5 wt.% of isatin (a). In a particularly preferred embodiment, an agent according to the invention is therefore characterized in that it contains, based on the total weight of the agent, 0.001 to 10 wt.%, preferably 0.01 to 5 wt.%, more preferably 0.1 to 3.5 wt.%, and most preferably 0.15 to 2.5 wt.% of isatin (a). Isatin can be obtained commercially from various suppliers such as Acros, Sigma Aldrich,Thermo Scientific, etc. Polymers (b) As the second component (b) essential to the invention, the colorant according to the invention contains at least one polymer from the group consisting of xanthan, algin, carrageenan, cetyl hydroxyethyl cellulose, carboxymethylcellulose, tragacanth, karaya gum, ghatti gum, agar, chitin, chitosan, gum arabic, gellan, guar, tamarind seed flour, locust bean gum, and their physiologically acceptable salts. Xanthan is a polysaccharide consisting, among other things, of the structural components D-glucose, D-mannose, D-glucuronic acid,Acetate and pyruvate, and is also known under the INCI name Xanthan Gum. Xanthan contains carboxyl groups and is anionic or anionizable. The physiologically acceptable salts of xanthan are also according to the invention. For example, CP Kelco markets xanthan commercially under the trade name Keltrol TF. The salts of alginic acid are referred to as alginates (INCI name Algin). Alginic acid is also alternatively referred to as algin. Alginates are acidic, carboxyl-containing polysaccharides consisting of D-mannuronic acid and D-guluronic acid in varying ratios, which are linked by 1-4 glycosidic bonds. According to the invention, in particular the alkali and alkaline earth salts of alginic acids are used. The use of alginic acid, sodium alginate, potassium alginate,Ammonium alginate and / or calcium alginate are highlighted. The sodium salt of alkyne, for example, can be purchased from Kelco under the trade name Kelgin F. Carrageenan is also synonymously referred to as carrageenan. Carrageenan is sulfated galactan, which can be obtained, for example, by extraction from red algae. The carrageenan precipitated from the hot-water extract of the algae is a colorless to sandy-colored powder with a molecular weight of 100,000–800,000 and a sulfate content of approximately 25%, which is very easily soluble in warm water. Carrageenan is divided into three main components: XQWHUVFKLHGOLFKHQ^ (LJHQVFKDIWHQ^^ EHL^ GHQHQ^ HV^ VLFK^ XP^ ^^ -&DUUDJHHQDQ^^ ^-&DUUDJHHQDQ^ XQG^ ^- Carrageenan. The gel-forming ^-fraction consists of D-galactose-4-sulfate and 3,6-anhydro-Į-D-galactose, which are alternately glycosidically linked in the 1,3- and 1,4-positions. The non-gelling ^-fraction consists of 1,It is composed of 3-glycosidically linked D-galactose-2-sulfate and 1,4-linked D-galactose-2,6-disulfate residues and is readily soluble in cold water. ^-Carrageenan, composed of D-galactose-4-sulfate in a 1,3-bond and 3,6-anhydro-ή-D-galactose-2-sulfate in a 1,4-bond, is soluble in hot water and also gel-forming. Cetyl hydroxyethyl cellulose, alternatively known as hexadecylhydroxyethyl cellulose, is a hydrophobically modified hydroxyethyl cellulose and bears the CAS number 80455-45-4. Cetyl hydroxyethyl cellulose is a nonionic associative polymer containing both hydroxyalkyl groups and long-chain alkyl groups. Cetyl Hydroxyethyl Cellulose, for example, can be purchased commercially from Ashland under the trade name Natrosol Plus 330 CS. Carboxymethylcelluloses are cellulose ethers, derivatives of cellulose,in which some of the hydroxyl groups are linked as ethers to a carboxymethyl group (-CH2-COOH). In the free acid form, carboxymethylcellulose has the CAS number 9000-11-7, and the sodium salt has the CAS number 9004-32-4. Both the free acid and the sodium salt of carboxymethylcellulose are in accordance with the invention. Carboxymethylcellulose can be purchased, for example, from the manufacturer Shahid Zeinoddin under the trade name Carboxymethylcellulose sodium salt. The substance is also commercially available from SE Tylose (Shin Etsu) under the trade name Tylose C 6000. Traganth (also known as tragacanth, tragacanth gum, gum tragacanth) is a gum or a natural polysaccharide. It consists of the sap of shrubby members of the Fabaceae genus Astragalus (Astragalus gummifer), which dries out after cutting trunks and branches.Astragalus bustillosii and Astragalus tragacantha, as well as Astracantha adscendens, Astracantha microcephala, Astracantha kurdica, and Astracantha strobilifera. Karaya (Indian tragacanth, karaya gum, sterculia gum, E 416) is a gum consisting primarily of carbohydrates and galacturonic acid. It is an acidic polysaccharide composed of D-galactose, L-rhamnose, D-galacturonic acid, D-glucuronic acid, and acetic acid. Ghatti gum, also known as Indian gum, is a polysaccharide extracted from the bark exudate of the tree Anogeissus latifolia (Combretaceae), which is native to India and Sri Lanka. The properties of Ghatti gum are similar to those of gum arabic. 80–90% of Ghatti gum is soluble or dispersible in water, but the aqueous solutions have a higher viscosity. Ghatti gum has the CAS number 9000-28-6 and can be purchased from suppliers such as Biosynth Carbosynth. Agar, also called agar-agar,is a galactose polymer and thus a polysaccharide capable of forming jelly. The basic units of agar are agarose and sulfated agaropectin. Agar is made from the cell walls of some algae species (especially red algae, such as Gracilaria, Gelidiopsis, Gelidium, Hypnea, and Sphaerococcus species), mainly from East Asia. Chitin is a polysaccharide composed of acetylglucosamine units (more precisely: 2-acetamido-2-deoxy-D-glucopyranose, or N-acetyl-D-glucosamine, abbreviated to GlcNAc). The acetylglucosamine (LQKHLWHQ^VLQG^GXUFK^ȕ-1,4-glycosidic bonds. Chitin can therefore be regarded as a variant of cellulose in which the hydroxy groups in position 2 of the monomer units have been replaced by acetamido groups. Chitosan, which can also be called poliglusam or poly-D-glucosamine or polyglucosamine, is a naturally occurring biopolymer derived from the – DXV^ȕ-1,Chitosan is derived from chitin, composed of 4-glycosidically linked N-acetylglucosamine residues (more precisely, 2-acetamido-2-deoxy-ȕ-D-glucopyranose residues), and is thus, like chitin, a polyaminosaccharide. To produce chitosan, chitin is deacetylated, so that the molecule ultimately consists of only approximately 2,000 linearly linked 2-amino-2-deoxy-ȕ-D-glucopyranose or glucosamine monomers. Gum arabic (also gum arabic and translated as Arabic gum) is the gum extracted from the exudate of various acacia trees and species found in Africa, such as the gum arabic tree (Senegalia senegal), the gum arabic acacia (Vachellia nilotica), the seyal acacia (Vachellia seyal), and Vachellia tortilis, Vachellia gummifera, Vachellia karroo, and the terrible acacia (Vachellia horrida). Gellan belongs to the linear polysaccharides and consists of several different building blocks. It consists of a rhamnose,one glucuronic acid and two glucose basic units, which are esterified with acetic acid and glyceric acid. The glucuronic acid exists as a mixed potassium, calcium, sodium, and magnesium salt. The molar mass is approximately 500,000 g / mol. The guar bean (Cyamopsis tetragonoloba), also called guar or bush bean, is a cultivated plant in the legume family (Fabaceae or Leguminosae), subfamily Faboideae. It is closely related to several other field crops called "beans." The most important product of the plant is guar gum (also called guar, guar meal, or guar gum), which consists mainly of the polysaccharide guar. To produce guar gum, the outer layers and the germ are separated from the seed before it is ground. Tamarind kernel flour is the product made from the seeds of the tamarind. These contain complex carbohydrates (polysaccharides or hydrocolloids),which are used primarily as gelling and thickening agents. Tamarind seed flour can be isolated by extraction with hot water and subsequent drying. The main components of these polysaccharides, in addition to arabinose, are primarily galactose, xylose, and glucose ("grape sugar"). Locust bean gum is a polysaccharide consisting largely of galactose (20%) and mannose (80%). Particularly intense and natural colors were obtained with oxidative coloring agents containing isatin (a) and at least one polymer (b) selected from the group consisting of xanthan, algin, carrageenan, cetyl hydroxyethyl cellulose, carboxymethylcellulose, and their physiologically acceptable salts. Therefore, the use of polymers from this specific group is very particularly preferred. Within the scope of a further very particularly preferred embodiment, an agent according to the invention is characterized in that it contains at least one polymer (b) selected from the group consisting of xanthan, algin,Contains carrageenan, cetyl hydroxyethyl cellulose, carboxymethylcellulose, and their physiologically acceptable salts. Physiologically acceptable salts of the polymers (b) are all salts that can be applied to the body under physiological conditions in the cosmetic field. Particularly suitable physiologically acceptable salts are, in particular, the sodium salts, the potassium salts, and the ammonium salts of the polymers (b). The polymer(s) (b) are preferably used in certain quantity ranges in the agent according to the invention. The agent preferably contains—based on the total weight of the agent—one or more polymers (b) in a total amount of 0.01 to 10.0 wt.%, preferably 0.1 to 5.0 wt.%, more preferably 0.2 to 2.5 wt.%, and very particularly preferably 0.3 to 1.5 wt.%. In a further very particularly preferred embodiment, an agent according to the invention is characterized in thatthat it contains – based on the total weight of the agent – ​​one or more polymers (b) in a total amount of 0.01 to 10.0 wt. %, preferably 0.1 to 5.0 wt. %, more preferably 0.2 to 2.5 wt. %, and most preferably 0.3 to 1.5 wt. %. Developer-type oxidation dye precursors (a) Oxidative colorants contain oxidation dye precursors, so-called developers and couplers, for the formation of the color. Developers and couplers diffuse separately into the keratin fibers and, under the influence of ammonia as an alkalizing agent and an oxidizing agent (usually hydrogen peroxide), form the actual dyes in a chemical reaction with one another. Depending on the amount of oxidizing agent used, the keratin fibers are lightened to a greater or lesser extent during the coloring process, since the oxidizing agent not only initiates the dye formation process of developers and couplers,but also the hair's own pigments (melanins) are oxidatively destroyed. Depending on the amounts of the oxidation dye precursors and the oxidizing agent used, the oxidative coloring can therefore primarily be a coloring (with a high dye content) or primarily a lightening (with a high oxidizing agent content). In the latter case, the oxidation dye precursors are used primarily to shade the lightening result. The oxidative coloring agents according to the invention particularly preferably contain, in addition to isatin (a), at least one oxidation dye precursor of the developer type (c), also referred to as developer for short. Particularly suitable oxidation dye precursors of the developer type are selected from the group consisting of p-toluenediamine, 2-methoxymethyl-p-phenylenediamine, 2-(2-hydroxyethyl)-p-phenylenediamine, N,N-bis-(2-hydroxyethyl)-p-phenylenediamine,p-Phenylenediamine and their physiologically acceptable salts. In a particularly preferred embodiment, an agent according to the invention is therefore characterized in that it contains at least one oxidation dye precursor of the developer type (c) selected from the group consisting of p-toluenediamine, 2-methoxymethyl-p-phenylenediamine, 2-(2-hydroxyethyl)-p-phenylenediamine, N,N-bis-(2-hydroxyethyl)-p-phenylenediamine, p-phenylenediamine, and their physiologically acceptable salts. p-Toluenediamine is alternatively also referred to as 2,5-toluenediamine, p-toluenediamine (abbreviation: PTD), 2,5-diaminotoluene, 2-methyl-p-phenylenediamine, or 2,5-diaminomethylbenzene. PTD has the CAS number 95-70-5. 2-Methoxymethyl-p-phenylenediamine is alternatively known as 2-methoxymethyl-1,4-benzenediamine and has the CAS number 337906-36-2 in its free base form. 2-(2-Hydroxyethyl)-p-phenylenediamine is alternatively known as 2-(2,5-Diaminophenyl)ethanol and, in the form of its free base, has the CAS number 93841-24-8. N,N-Bis-(2-hydroxyethyl)-p-phenylenediamine, in the form of its free base, has the CAS number 7575-35-1. Using an oxidative dye containing a developer (c) from the aforementioned group with the basic structure of 1,4-diaminobenzene, hair could be dyed with very high intensity in natural shades, particularly dark brown, medium brown, and dark blonde. What was particularly surprising was that the hair could be dyed in a shade that was particularly similar to the shade obtained with a dye containing the classic combination of PDT and resorcinol. The agents which have proven particularly suitable for achieving the object of the invention are those which contain at least one oxidation dye precursor of developer type (c) which is selected from the group consisting of p-toluenediamine,2-Methoxymethyl-p-phenylenediamine and their physiologically acceptable salts. In a particularly preferred embodiment, an agent according to the invention is therefore characterized in that it contains at least one oxidation dye precursor of developer type (c) selected from the group consisting of p-toluenediamine, 2-methoxymethyl-p-phenylenediamine and their physiologically acceptable salts. For the formation of shades with a reddish natural tone range, the agent according to the invention can also contain other developers (c). Developers from the group consisting of 4-amino-3-methylphenol, p-aminophenol, 4,5-Diamino-1-(2-hydroxyethyl)pyrazole and their physiologically acceptable salts. These developers can be used either as a standalone group or together with one or more developers having a basic structure of p-phenylenediamine. In a further preferred embodiment, an agent according to the invention is therefore characterized in that it contains at least one oxidation dye precursor of developer type (c) selected from the group consisting of 4-amino-3-methylphenol, p-aminophenol, 4,5-diamino-1-(2-hydroxyethyl)pyrazole, and their physiologically acceptable salts. In a further particularly preferred embodiment, an agent according to the invention is therefore characterized in that it contains at least one oxidation dye precursor of developer type (c) which is selected from the group consisting of p-toluenediamine, 2-methoxymethyl-p-phenylenediamine, 2-(2-hydroxyethyl)-p-phenylenediamine, N,N-bis-(2-hydroxyethyl)-p-phenylenediamine,p-Phenylenediamine, 4-amino-3-methylphenol, p-aminophenol, 4,5-diamino-1-(2-hydroxyethyl)pyrazole, and their physiologically acceptable salts. The developers of the above-mentioned groups can be used in the agent according to the invention in the form of their free base or in the form of their physiologically acceptable salts. A physiologically acceptable salt is understood to be a salt of the developer that is well tolerated by the user under physiological conditions, i.e., during application of the agent. Physiologically acceptable salts are, in particular, the chlorides, bromides, sulfates, and hemisulfates of the developers (c). In a further particularly preferred embodiment, an agent according to the invention is therefore characterized in that it contains at least one oxidation dye precursor of developer type (c) which is selected from the group consisting of p-toluenediamine, p-toluenediamine sulfate, p-toluenediamine chloride, p-toluenediamine bromide,2-Methoxymethyl-p-phenylenediamine, 2-methoxymethyl-p-phenylenediamine sulfate, 2-methoxymethyl-p-phenylenediamine chloride and 2-methoxymethyl-p-phenylenediamine bromide, , 4,5-diamino-1-(2-hydroxyethyl)pyrazole chloride, 4,5-diamino-1-(2-hydroxyethyl)pyrazole bromide and , 4,5-diamino-1-(2-hydroxyethyl)pyrazole sulfate. Depending on the desired color outcome, it may further be preferred if the agent additionally contains one or more further oxidation dye precursors of the developer type, which are selected from the group 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, 4-amino-2-aminomethylphenol, 4-amino-2-(1,2-dihydroxyethyl)phenol, 4-amino-2-(diethylaminomethyl)phenol, 2,4,5,6-tetraaminopyrimidine, 4-hydroxy-2,5,6-triaminopyrimidine, 2-hydroxy-4,5,6-triaminopyrimidine, 2,3-Diamino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one and their physiologically acceptable salts. The developer(s) are preferably used in specific quantity ranges in the agent according to the invention. The agent preferably contains - based on the total weight of the agent - one or more oxidation dye precursors of developer type (c) in a total amount of 0.001 to 10.0 wt.%, preferably from 0.01 to 6.0 wt.%, more preferably from 0.1 to 5.0 wt.% and most preferably from 0.15 to 4.7 wt.%. In a particularly preferred embodiment, an agent according to the invention is therefore characterized in that it contains - based on the total weight of the agent - one or more oxidation dye precursors of developer type (c) in a total amount of 0.001 to 10.0 wt.%, preferably from 0.01 to 6.0 wt.%, more preferably from 0.1 to 5.0 wt.% and most preferably from 0.15 to 4.7 wt.%.7 wt.% further couplers (d) in the oxidative dye. For precise shading and / or fine adjustment of the desired color tone, the oxidative dye may contain further couplers (d) in addition to isatin (a) and optionally the developer-type oxidation dye precursor(s) (c). Other very suitable couplers can be selected, for example, from the group of 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, 1-amino-3-bis-(2-hydroxyethyl)aminobenzene, 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, 2,7-dihydroxynaphthalene, 1,7-dihydroxynaphthalene, 1,8-dihydroxynaphthalene, 4-hydroxyindole, 6-hydroxyindole, 7-hydroxyindole, 4-hydroxyindoline, 6-hydroxyindoline, 7-hydroxyindoline or mixtures of these compounds or their physiologically acceptable salts. In a particularly preferred embodiment, an agent according to the invention is therefore characterized in that it contains at least one oxidation dye precursor of the coupler type (d) which is selected from the group consisting of 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, 1-amino-3-bis-(2-hydroxyethyl)aminobenzene, 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, 2,7-dihydroxynaphthalene, 1,7-dihydroxynaphthalene, 1,8-dihydroxynaphthalene, 4-hydroxyindole, 6-hydroxyindole, 7-Hydroxyindole, 4-Hydroxyindoline, 6-Hydroxyindoline, 7-Hydroxyindoline or mixtures of these compounds or their physiologically acceptable salts. Particularly natural shades with a high similarity to the corresponding resorcinol-containing dyes could be obtained if the dye additionally contained one or more couplers (d) selected from the group consisting of 3-aminophenol, 5-amino-2-methylphenol, 3-amino-2-chloro-6-methylphenol, 2-amino-3-hydroxypyridine, 1-methoxy-2-amino-4-(2-hydroxyethylamino)benzene,6-hydroxyindole or mixtures of these compounds or their physiologically acceptable salts. For this reason, the use of couplers (d) from this group is explicitly very particularly preferred. In an explicitly very particularly preferred embodiment, a composition according to the invention is therefore characterized in that it contains at least one oxidation dye precursor of coupler type (d) selected from the group consisting of 3-aminophenol, 5-amino-2-methylphenol, 3-amino-2-chloro-6-methylphenol, 2-amino-3-hydroxypyridine, 1-methoxy-2-amino-4-(2-hydroxyethylamino)benzene, 6-hydroxyindole or mixtures of these compounds or their physiologically acceptable salts. The couplers from the above-described group (d) are also preferably used in certain quantity ranges in the composition according to the invention. Particularly good results have been obtainedif the agent - based on the total weight of the agent - contained one or more oxidation dye precursors of the coupler type (d) in a total amount of 0.001 to 10 wt.%, preferably from 0.01 to 5 wt.%, more preferably from 0.1 to 3.5 wt.% and most preferably from 0.15 to 2.5 wt.%. In a further preferred embodiment, an agent according to the invention is therefore characterized in that it contains - based on the total weight of the agent - one or more oxidation dye precursors of the coupler type (d) in a total amount of 0.001 to 10 wt.%, preferably from 0.01 to 5 wt.%, more preferably from 0.1 to 3.5 wt.% and most preferably from 0.15 to 2.5 wt.%. No resorcinol-type couplers As already described, the agents of the present application were intended to develop intensive dyeings in the natural tone range, which exceed the nuances produced with resorcinol-containing dyeing agents.as closely as possible without having to rely on resorcinol-type couplers. Resorcinol-type couplers, or couplers from the resorcinol group, are understood to be 1,3-dihydroxybenzene and its derivatives. Derivatives of 1,3-dihydroxybenzene are all compounds that have a 1,3-dihydroxybenzene basic structure and carry additional substituents, although both hydroxyl groups of the 1,3-dihydroxybenzene must still be present. The resorcinol-type couplers commonly used in commercial products are resorcinol, 2-methylresorcinol, and 4-chlororesorcinol. Therefore, couplers from the resorcinol group are understood to include, in particular, resorcinol, 2-methylresorcinol, and 4-chlororesorcinol. In the agents of the present application, these couplers are to be dispensed with, therefore it is preferred if the total amount of the oxidation dye precursors of the coupler type contained in the agent is from the group of resorcinols,in particular from the group of resorcinol, 2-methylresorcinol and 4-chlororesorcinol, is below 0.1 wt.%, preferably below 0.05 wt.%, particularly preferably below 0.01 wt.% and very particularly preferably 0 wt.%. In a further very particularly preferred embodiment, an agent according to the invention is therefore characterized in that - based on the total weight of the agent - the total amount of the oxidation dye precursors of the coupler type from the group of resorcinols, in particular from the group of resorcinol, 2-methylresorcinol and 4-chlororesorcinol, contained in the agent is below 0.1 wt.%, preferably below 0.05 wt.%, particularly preferably below 0.01 wt.% and very particularly preferably 0 wt.%. Direct dyes Furthermore, the agents according to the invention can optionally contain at least one direct dye. These are dyes,which are absorbed directly onto the hair and do not require an oxidative process to develop the color. Direct dyes are usually nitrophenylenediamines, nitroaminophenols, azo dyes, anthraquinones, triarylmethane dyes, or indophenols. The direct dyes are preferably used in an amount of 0.001 to 20% by weight, in particular 0.05 to 5% by weight, based on the total application preparation. The total amount of direct dyes is preferably at most 3% by weight. Direct dyes can be divided into anionic, cationic, and non-ionic direct dyes, which are selected and used by the person skilled in the art according to the requirements of the carrier base. Preferred anionic direct dyes are those known under the international designations or trade names Bromophenol Blue, Tetrabromophenol Blue, 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 and Acid Black 52. Preferred cationic substantive dyes are Basic Blue 7, Basic Blue 26, Basic Violet 2 and Basic Violet 14, Basic Yellow 57, Basic Red 76, Basic Blue 16, Basic Blue 347 (Cationic Blue 347 / Dystar), HC Blue No. 16, Basic Blue 99, Basic Brown 16, Basic Brown 17, Yellow 87, Basic Orange 31 and Basic Red 51. Particularly suitable non-ionic substantive dyes are non-ionic nitro and quinone dyes and neutral azo dyes. Preferred non-ionic direct dyes are those known under the international designations or trade names 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 11, 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 known compounds, as well as 1,4-diamino-2-nitrobenzene, 2-amino-4-nitrophenol, 1,4-bis-(2-hydroxyethyl)-amino-2-nitrobenzene, 3-nitro-4-(2-hydroxy-ethyl)-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-nitrophenyl)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. Hydrogen peroxide (e) For the formation of the colors in the oxidative dyeing process, the oxidative dyeing agent according to the invention preferably contains at least one oxidizing agent (e),which is particularly preferably hydrogen peroxide and / or the adducts of hydrogen peroxide with organic or inorganic compounds. In a preferred embodiment, hydrogen peroxide itself is used as an aqueous solution in the oxidative colorant. The concentration of a hydrogen peroxide solution is determined on the one hand by legal requirements and on the other hand by the desired effect; preferably, 6 to 12 wt.% solutions in water are used. Oxidative solutions preferred according to the invention are characterized in that they contain 0.5 to 20 wt.%, preferably 1 to 12.5 wt.%, more preferably 2.5 to 10 wt.%, and particularly preferably 3 to 8 wt.% hydrogen peroxide, in each case based on the total weight of the oxidative colorant. In a further particularly preferred embodiment, an agent according to the invention is therefore characterized in thatthat it contains at least one oxidizing agent (e) from the group consisting of hydrogen peroxide and its adducts with organic or inorganic compounds. In a particularly preferred embodiment, an agent according to the invention is characterized in that it contains - based on the total weight of the agent - 0.5 to 20 wt.%, preferably 1 to 12.5 wt.%, more preferably 2.5 to 10 wt.%, and particularly preferably 3 to 8 wt.% hydrogen peroxide (e). Alkalizing agent Dyeing processes on keratin fibers usually take place in an alkaline environment. In order to protect the keratin fibers and also the skin as much as possible, setting a pH value that is too high is not desirable. Therefore, it is preferred if the pH value of the ready-to-use agent is between 6 and 11, in particular between 7 and 10.5. The pH values ​​within the meaning of the present invention are pH valueswhich were measured at a temperature of 22°C. The work leading to this invention has shown that particularly good color results were obtained when an alkalizing agent from the group consisting of ammonia, monoethanolamine, 2-amino-2-methylpropanol, arginine, lysine, ornithine, and histidine was used in the coloring agent according to the invention. For this reason, the coloring agent according to the invention contains, as a third essential ingredient, at least one alkalizing agent (f) from the group consisting of ammonia, monoethanolamine, 2-amino-2-methylpropanol, arginine, lysine, ornithine, and histidine. In a particularly preferred embodiment, an agent according to the invention is characterized in that it contains at least one alkalizing agent (f) from the group consisting of ammonia, monoethanolamine, 2-amino-2-methylpropanol, arginine, lysine,Contains ornithine and histidine. Within this group, the best results were obtained with ammonia and monoethanolamine. For this reason, agents containing at least one alkalizing agent from the group consisting of ammonia and monoethanolamine, most preferably ammonia, are particularly preferred. Ammonia is most preferred. In a particularly preferred embodiment, an agent according to the invention is therefore characterized in that it contains at least one alkalizing agent (f) from the group consisting of ammonia and monoethanolamine, most preferably ammonia. By using the suitable or preferred alkalizing agent(s), the pH value suitable for the oxidative dyeing process can be adjusted in the dyeing agent according to the invention, which pH value is in the range from 6.5 to 11.5, preferably from 8.5 to 11.0, and most preferably from 9.0 to 10.5. In a further preferred embodiment, an agent according to the invention is therefore characterized in that it contains water and has a pH of 6.5 to 11.5, preferably of 8.5 to 11.0, and most preferably of 9.0 to 10.5. For precise adjustment of the pH, the coloring agent may also contain one or more acidifying agents in addition to the alkalizing agents. Acidifying agents preferred according to the invention are food acids, such as citric acid, acetic acid, malic acid, or tartaric acid, as well as diluted mineral acids. The pH values ​​within the meaning of the present invention are pH values ​​measured at a temperature of 22°C. Further ingredients in the agent Preferably, an emulsifier or a surfactant is also added to the oxidative coloring agents, whereby surface-active substances are referred to as surfactants or emulsifiers depending on the field of application and can be selected from anionic, cationic,zwitterionic, amphoteric and nonionic surfactants and emulsifiers. In a further particularly preferred embodiment, an agent according to the invention is therefore characterized in that it contains at least one surfactant selected from the group of anionic, amphoteric, zwitterionic and nonionic surfactants. Suitable anionic surfactants in agents according to the invention are all anionic surface-active substances suitable for use on the human body. These are characterized by a water-solubilizing, anionic group such as a carboxylate, sulfate, sulfonate or phosphate group and a lipophilic alkyl group with about 8 to 30 C atoms. In addition, the molecule can contain glycol or polyglycol ether groups, ester, ether and amide groups as well as hydroxyl groups. Examples of suitable anionic surfactants are, in each case in the form of the sodium, potassium and ammonium as well as the mono,Di- and trialkanolammonium salts with 2 to 4 C atoms in the alkanol group, - linear and branched fatty acids with 8 to 30 C atoms (soaps), - ethercarboxylic acids of the formula RO(CH2CH2O)xCH2COOH, in which R is a linear alkyl group with 8 to 30 C atoms and x = 0 or 1 to 16, - acylsarcosides with 8 to 24 C atoms in the acyl group, - acyltaurides with 8 to 24 C atoms in the acyl group, - acyl isethionates with 8 to 24 C atoms in the acyl group, - sulfosuccinic acid mono- and dialkyl esters with 8 to 24 C atoms in the alkyl group and sulfosuccinic acid mono-alkylpolyoxyethyl esters with 8 to 24 C atoms in the alkyl group and 1 to 6 oxyethyl groups, - linear alkanesulfonates with 8 to 24 C atoms, - linear D-olefinsulfonates with 8 to 24 C atoms, - sulfonates of unsaturated fatty acids with 8 to 24 C atoms and 1 to 6 double bonds, - D-sulfofatty acid methyl esters of fatty acids with 8 to 30 C atoms, - alkyl sulfates and alkyl ether sulfates of the formula RO(CH2CH2O), xSO3H, in which R is a preferably linear alkyl group having 8 to 30 C atoms and x = 0 or 1 to 12, - mixtures of surface-active hydroxysulfonates, - sulfated hydroxyalkyl polyethylene and / or hydroxyalkylene propylene glycol ethers, - esters of tartaric acid and citric acid with alcohols, which are addition products of about 2-15 molecules of ethylene oxide and / or propylene oxide with fatty alcohols having 8 to 22 C atoms, - alkyl and / or alkenyl ether phosphates of the formula O RO(C2H4O) x P OR' OH in which R preferably represents an aliphatic, optionally unsaturated hydrocarbon radical having 8 to 30 carbon atoms, R' represents hydrogen, a radical (CH2CH2O)yR and x and y independently represent a number from 1 to 10, - sulfated fatty acid alkylene glycol esters of the formula RC(O)O(alkO) nSO3H, where R is a linear or branched, aliphatic, saturated and / or unsaturated alkyl radical having 6 to 22 carbon atoms, alk is CH2CH2, CHCH3CH2, and / or CH2CHCH3, and n is a number from 0.5 to 5, - monoglyceride sulfates and monoglyceride ether sulfates. Preferred anionic surfactants are alkyl sulfates, alkyl ether sulfates, and ether carboxylic acids with 10 to 18 carbon atoms in the alkyl group and up to 12 glycol ether groups in the molecule. Zwitterionic surfactants are surface-active compounds that contain at least one quaternary ammonium group and at least one carboxylate, sulfonate, or sulfate group in the molecule.Particularly suitable zwitterionic surfactants are the so-called betaines such as N-alkyl-N,N-dimethylammonium glycinates, for example cocoalkyl dimethylammonium glycinate, N-acyl-aminopropyl-N,N-dimethylammonium glycinates, for example cocoacylaminopropyl dimethylammonium glycinate, and 2-alkyl-3-carboxymethyl-3-hydroxyethyl-imidazolines, each with 8 to 18 C atoms in the alkyl or acyl group, as well as cocoacylaminoethyl hydroxyethylcarboxymethyl glycinate. A preferred zwitterionic surfactant is the fatty acid amide derivative known under the INCI name Cocamidopropyl Betaine. Amphoteric surfactants are understood to be surface-active compounds which, in addition to a C8-C 24-Alkyl or -acyl group in the molecule contain at least one free amino group and at least one -COOH- or -SO3H group and are capable of forming internal salts. Examples of suitable amphoteric surfactants are N-alkylglycines, N-alkylpropionic acids, N-alkylaminobutyric acids, N-alkyliminodipropionic acids, N-hydroxyethyl-N-alkylamidopropylglycines, N-alkyltaurines, N-alkylsarcosines, 2-alkylaminopropionic acids and alkylaminoacetic acids, each containing about 8 to 24 C atoms in the alkyl group. Particularly preferred amphoteric surfactants are N-cocoalkylaminopropionate, cocoacylaminoethylaminopropionate and C12-C18-acylsarcosine. Furthermore, it has proven advantageous if the coloring and brightening agents according to the invention contain further, non-ionic surfactants. Non-ionic surfactants contain, for example, a polyol group, a polyalkylene glycol ether group or a combination of polyol and polyglycol ether groups as a hydrophilic group.Such compounds are, for example, - addition products of 1 to 50 mol of ethylene oxide and / or 0 to 5 mol of propylene oxide with linear and branched fatty alcohols having 8 to 30 C atoms, such as, for example, lauryl, myristyl, cetyl, but also stearyl, isostearyl and oleyl alcohol, with fatty acids having 8 to 30 C atoms and with alkylphenols having 8 to 15 C atoms in the alkyl group, - addition products of 1 to 50 mol of ethylene oxide and / or 0 to 5 mol of propylene oxide, end-capped with a methyl or C2-C6 alkyl radical, with linear and branched fatty alcohols having 8 to 30 C atoms, with fatty acids having 8 to 30 C atoms and with alkylphenols having 8 to 15 C atoms in the alkyl group, such as, for example, which is sold under the name Dehydol. ® LS, Dehydol ® LT (Cognis) available types, - polyglycerol esters and alkoxylated polyglycerol esters, such as poly(3)glycerol diisostearate (trade product: Lameform £TGI (Henkel)) and poly(2)glycerol polyhydroxystearate (trade product: Dehymuls £ PGPH (Henkel)). - Polyol fatty acid esters, such as the commercial product Hydagen ®HSP (Cognis) or Sovermol types (Cognis), - higher alkoxylated, preferably propoxylated and especially ethoxylated, mono-, di- and triglycerides, such as glycerol monolaurate + 20 ethylene oxide and glycerol monostearate + 20 ethylene oxide, - amine oxides, - hydroxy mixed ethers, - sorbitan fatty acid esters and addition products of ethylene oxide with sorbitan fatty acid esters such as the polysorbates and sorbitan monolaurate + 20 mol ethylene oxide (EO), - sugar fatty acid esters and addition products of ethylene oxide with sugar fatty acid esters, - addition products of ethylene oxide with fatty acid alkanolamides and fatty amines, - fatty acid N-alkylglucamides, - alkylphenols and alkylphenol alkoxylates having 6 to 21, in particular 6 to 15 carbon atoms in the alkyl chain and 1 to 30 Ethylene oxide and / or propylene oxide units. Preferred representatives of this class are, for example, nonylphenol + 9 EO and octylphenol + 8 EO; - Alkyl polyglycosides corresponding to the general formula RO-(Z) x, where R is alkyl, Z is sugar, and x is the number of sugar units. The alkyl polyglycosides usable according to the invention can contain only one specific alkyl radical R. However, these compounds are usually prepared from natural fats and oils or mineral oils. In this case, the alkyl radicals R are mixtures depending on the starting compounds or the respective processing of these compounds. Suitable nonionic surfactants are particularly C8-C22 alkyl mono- and oligoglycosides and their ethoxylated analogues. In particular, the non-ethoxylated compounds have proven particularly suitable. Alkyl polyglycosides of the formula RO-(Z) are particularly preferred. x , in which R - consists essentially of C8 and C10 alkyl groups, - consists essentially of C12 and C14 alkyl groups, - consists essentially of C8 to C 16 -alkyl groups or - consisting essentially of C 12 - to C 16-alkyl groups or - consists essentially of C16 to C18 alkyl groups. These compounds are characterized in that any mono- or oligosaccharides can be used as the sugar building block Z. Sugars with 5 or 6 carbon atoms and the corresponding oligosaccharides are usually used. Such sugars are, for example, glucose, fructose, galactose, arabinose, ribose, xylose, lyxose, allose, altrose, mannose, gulose, idose, talose and sucrose. Preferred sugar building blocks are glucose, fructose, galactose, arabinose and sucrose; glucose is particularly preferred. The alkyl polyglycosides which can be used according to the invention contain on average 1.1 to 5 sugar units. Alkyl polyglycosides with x values ​​of 1.1 to 2.0 are preferred. Alkyl glycosides in which x is 1.1 to 1.8 are very particularly preferred. The alkoxylated homologues of the above-mentioned alkyl polyglycosides can also be used according to the invention.These homologs can contain an average of up to 10 ethylene oxide and / or propylene oxide units per alkyl glycoside unit. Other preferred nonionic surfactants have proven to be the alkylene oxide addition products with saturated linear fatty alcohols and fatty acids, each containing 2 to 30 moles of ethylene oxide per mole of fatty alcohol or fatty acid. Preparations with excellent properties are also obtained when they contain fatty acid esters of ethoxylated glycerol as nonionic surfactants. Particularly preferred nonionic surface-active substances are substances that are commercially available in pure form as solids or liquids due to their ease of processing. The definition of purity in this context does not refer to chemically pure compounds.Rather, especially in the case of naturally derived products, mixtures of different homologs can be used, for example, with different alkyl chain lengths, as is the case with products based on natural fats and oils. Alkoxylated products also typically contain mixtures of different degrees of alkoxylation. In this context, the term purity refers rather to the fact that the selected substances should preferably be free of solvents, suspending agents, and other accompanying substances. For surfactants that are addition products of ethylene and / or propylene oxide with fatty alcohols or derivatives of these addition products, both products with a "normal" homolog distribution and those with a narrowed homolog distribution can be used."Normal" homolog distribution refers to mixtures of homologs obtained from the reaction of fatty alcohols and alkylene oxides using alkali metals, alkali metal hydroxides, or alkali metal alkoxides as catalysts. Narrowed homolog distributions, on the other hand, are obtained when, for example, hydrotalcites, alkaline earth metal salts of ether carboxylic acids, alkaline earth metal oxides, hydroxides, or alkoxides are used as catalysts. The use of products with a narrowed homolog distribution may be preferred. The anionic, nonionic, zwitterionic, or amphoteric surfactants are used in amounts of 0.1 to 45 wt.%, preferably 1 to 30 wt.%, and very particularly preferably 1 to 15 wt.%, based on the total amount of the ready-to-use agent. Cationic surfactants of the quaternary ammonium compound, esterquat, and amidoamine type are also preferred according to the invention.Preferred quaternary ammonium compounds are ammonium halides, especially chlorides and bromides, such as alkyltrimethylammonium chlorides, dialkyldimethylammonium chlorides, and trialkylmethylammonium chlorides, e.g., cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, distearyldimethylammonium chloride, lauryldimethylammonium chloride, lauryldimethylbenzylammonium chloride, and tricetylmethylammonium chloride, as well as the imidazolium compounds known under the INCI names Quaternium-27 and Quaternium-83. The long alkyl chains of the above-mentioned surfactants preferably have 10 to 18 carbon atoms. Other cationic surfactants usable according to the invention are quaternized protein hydrolysates.Alkylamidoamines are typically produced by amidating natural or synthetic fatty acids and fatty acid fractions with dialkylaminoamines and, in addition to their good conditioning effect, are particularly characterized by their good biodegradability. A particularly suitable compound from this group of substances according to the invention is stearamidopropyl dimethylamine, commercially available under the name Tegoamid® S 18. Quaternary ester compounds, so-called "esterquats," are also highly biodegradable. Esterquats are known substances that contain both at least one ester function and at least one quaternary ammonium group as a structural element. Preferred esterquats are quaternized ester salts of fatty acids with triethanolamine, quaternized ester salts of fatty acids with diethanolalkylamines, and quaternized ester salts of fatty acids with 1,2-dihydroxypropyldialkylamines.Such products are sold, for example, under the trademarks Stepantex. £ , Dehyquart £ and Armocare £ The products Armocare £ VGH-70, an N,N-bis(2-palmitoyloxyethyl)dimethylammonium chloride, and Dehyquart £ F-75, Dehyquart ® C-4046, Dehyquart ® L80 and Dehyquart £AU-35 are examples of such esterquats. The cationic surfactants are preferably present in the agents used according to the invention in amounts of 0.05 to 10 wt. %, based on the total agent. Amounts of 0.1 to 5 wt. % are particularly preferred. In a preferred embodiment, non-ionic, zwitterionic and / or amphoteric surfactants and mixtures thereof may be preferred. In a further preferred embodiment, the effect of the active ingredient according to the invention can be increased by emulsifiers. Such emulsifiers are, for example, - addition products of 4 to 30 mol of ethylene oxide and / or 0 to 5 mol of propylene oxide with linear fatty alcohols having 8 to 22 C atoms, with fatty acids having 12 to 22 C atoms and with alkylphenols having 8 to 15 C atoms in the alkyl group, - C 12 -C 22-Fatty acid mono- and diesters of addition products of 1 to 30 mol of ethylene oxide with polyols having 3 to 6 carbon atoms, in particular with glycerol, - ethylene oxide and polyglycerol addition products with methylglucoside fatty acid esters, fatty acid alkanolamides and fatty acid glucamides, - C8-C 22 -Alkyl mono- and oligoglycosides and their ethoxylated analogues, with degrees of oligomerization of 1.1 to 5, in particular 1.2 to 2.0, and glucose as the sugar component being preferred, - mixtures of alkyl (oligo) glucosides and fatty alcohols, for example the commercially available product Montanov ®68, - addition products of 5 to 60 moles of ethylene oxide with castor oil and hydrogenated castor oil, - partial esters of polyols with 3 to 6 carbon atoms with saturated fatty acids with 8 to 22 carbon atoms, - sterols, where sterols are understood to be a group of steroids which carry a hydroxyl group on the 3-carbon atom of the steroid skeleton and which are isolated from both animal tissue (zoosterols) and vegetable fats (phytosterols). Examples of zoosterols are cholesterol and lanosterol. Examples of suitable phytosterols are ergosterol, stigmasterol and sitosterol. Sterols, the so-called mycosterols, are also isolated from fungi and yeasts. - phospholipids, especially glucose phospholipids, which e.g. B. as lecithins or phosphatidylcholines from e.g. egg yolk or plant seeds (e.g.soybeans), - fatty acid esters of sugars and sugar alcohols, such as sorbitol - polyglycerols and polyglycerol derivatives such as polyglycerol poly-12-hydroxystearate (commercial product Dehymuls. ®PGPH) - Linear and branched fatty acids with 8 to 30 carbon atoms and their Na, K, ammonium, Ca, Mg, and Zn salts. The agents according to the invention preferably contain the emulsifiers in amounts of 0.1 to 25% by weight, in particular 0.5 to 15% by weight, based on the total amount of the ready-to-use agent. Non-ionic emulsifiers or surfactants with an HLB value of 10-15 can be particularly preferred according to the invention. Among the emulsifier types mentioned, emulsifiers that do not contain ethylene oxide and / or propylene oxide in the molecule can be very particularly preferred. Further studies have shown that the oxidative formation of intense colorations from components (a) and (b) works particularly well in cosmetic carrier formulations that do not have an excessively high content of fatty components.In particular, strong color absorption was observed when - based on the total weight of the agent - the total amount of fatty components contained in the agent was below 25 wt.%, preferably below 20 wt.%, more preferably below 15 wt.% and most preferably below 13 wt.%. In a further preferred embodiment, an agent according to the invention is characterized in that - based on the total weight of the agent - the total amount of fatty components contained in the agent is below 25 wt.%, preferably below 20 wt.%, more preferably below 15 wt.% and most preferably below 13 wt.%. For the purposes of the invention, fatty components are understood to mean organic compounds with a solubility in water at room temperature (22°C) and atmospheric pressure (760 mmHg) of less than 1 wt.%, preferably less than 0.1 wt.%.The definition of fatty components explicitly includes only uncharged (i.e., non-ionic) compounds. Fat components contain at least one saturated or unsaturated alkyl group with at least 8 carbon atoms. The molecular weight of the fatty components is a maximum of 5000 g / mol, preferably a maximum of 2500 g / mol, and particularly preferably a maximum of 1000 g / mol. The fatty components are neither polyoxyalkylated nor polyglycerylated compounds. In this context, fatty components are considered components from the C group. 12 -C 30 - fatty alcohols, the C 12 -C 30 -fatty acid triglycerides and / or hydrocarbons. For the purposes of the present invention, only non-ionic substances are explicitly considered as fat components. Charged compounds such as fatty acids and their salts are not considered as fat components. In the case of C 12 -C 30-Fatty alcohols can be saturated, mono- or polyunsaturated, linear or branched fatty alcohols with 12 to 30 C atoms. Examples of preferred linear, saturated C 12 -C 30-Fatty alcohols are dodecan-1-ol (dodecyl alcohol, lauryl alcohol), tetradecan-1-ol (tetradecyl alcohol, myristyl alcohol), hexadecan-1-ol (hexadecyl alcohol, cetyl alcohol, palmityl alcohol), octadecan-1-ol (octadecyl alcohol, stearyl alcohol), arachyl alcohol (eicosan-1-ol), heneicosyl alcohol (heneicosan-1-ol) and / or behenyl alcohol (docosan-1-ol). Linear, unsaturated fatty alcohols are, for example, (9Z)-octadec-9-en-1-ol (oleyl alcohol), (9E)-octadec-9-en-1-ol (elaidyl alcohol), (9Z,12Z)-octadeca-9,12-dien-1-ol (linoleyl alcohol), (9Z,12Z,15Z)-octadeca-9,12,15-trien-1-ol (linolenoyl alcohol), gadoleyl alcohol ((9Z)-eicos-9-en-1-ol), arachidonic alcohol ((5Z,8Z,11Z,14Z)-eicosa-5,8,11,14-tetraen-1-ol), erucyl alcohol ((13Z)-docos-13-en-1-ol) and / or brassidyl alcohol ((13E)-docosen-1-ol). For the purposes of the present invention, a C12-C30 fatty acid triglyceride is understood to be the triester of the trivalent alcohol glycerol with three equivalents of fatty acid.Both structurally identical and structurally different fatty acids within a triglyceride molecule can participate in the ester formation. According to the invention, fatty acids include saturated or unsaturated, unbranched or branched, unsubstituted or substituted C. 12 -C 30-Carboxylic acids. Unsaturated fatty acids can be monounsaturated or polyunsaturated. In an unsaturated fatty acid, its C-C double bond(s) can have a cis or trans configuration. Fatty acid triglycerides include, for example, esters of glycerol with a fatty acid, wherein the fatty acid is selected from the group consisting of dodecanoic acid (lauric acid), tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acid), tetracosanoic acid (lignoceric acid), octadecanoic acid (stearic acid), eicosanoic acid (arachidic acid), docosanoic acid (behenic acid), petroselinic acid [(Z)-6-octadecenoic acid], palmitoleic acid [(9Z)-hexadec-9-enoic acid], oleic acid [(9Z)-octadec-9-enoic acid], elaidic acid [(9E)-octadec-9-enoic acid], erucic acid [(13Z)-docos-13-enoic acid], linoleic acid [(9Z, 12Z)-octadeca-9,12-dienoic acid, linolenic acid [(9Z,12Z,15Z)-octadeca-9,12,15-trienoic acid, elaeostearic acid [(9Z,11E,13E)-octadeca-9,11,3-trienoic acid], arachidonic acid [(5Z,8Z,11Z,14Z)-Icosa-5,8,11,14-tetraenoic acid] and / or nervonic acid [(15Z)-tetracos-15-enoic acid]. The fatty acid triglycerides can also be of natural origin. The fatty acid triglycerides found in soybean oil, peanut oil, olive oil, sunflower oil, macadamia nut oil, moringa oil, apricot kernel oil, marula oil, and / or optionally hydrogenated castor oil, or their mixtures, are, for example, corresponding natural fatty acid triglycerides. Hydrocarbons are compounds consisting exclusively of carbon and hydrogen atoms and having 8 to 80 carbon atoms. Particularly preferred in this context are aliphatic hydrocarbons such as mineral oils, liquid paraffin oils (e.g., paraffinium liquidum or paraffinum perliquidum), isoparaffin oils, semi-solid paraffin oils, paraffin waxes, hard paraffin (paraffinum solidum),Vaseline and polydecenes. Liquid paraffin oils (Paraffinum Liquidum and Paraffinium Perliquidum) have proven particularly suitable in this context. The hydrocarbon is most preferably Paraffinum Liquidum, also known as white oil. Paraffinum Liquidum is a mixture of purified, saturated, aliphatic hydrocarbons, consisting largely of hydrocarbon chains with a carbon chain distribution of 25 to 35 carbon atoms. Furthermore, it has proven advantageous if the compounds according to the invention contain at least one stabilizer or complexing agent. Common complexing agents and stabilizers preferred within the scope of the present invention are, for example, polyoxycarboxylic acids, polyamines, ethylenediaminetetraacetic acid (EDTA), N-hydroxyethylethylenediaminetriacetic acid, diethylenetriaminepentaacetic acid (DTPA), ethylenediaminedisuccinic acid (EDDS), hydroxyethyliminodiacetic acid,Nitridodiacetic acid-3-propionic acid, isoserinediacetic acid, N,N-di-(2-hydroxyethyl)glycine, N-(1,2-dicarboxy-2-hydroxyethyl)glycine, N-(1,2-dicarboxy-2-hydroxyethyl)aspartic acid or nitrilotriacetic acid (NTA), ethylenediaminediglutaric acid (EDGA), 2-hydroxypropylenediaminedisuccinic acid (HPDS), glycinamide-N,N'-disuccinic acid (GADS), ethylenediamine-N-N'-diglutaric acid (EDDG), 2-hydroxypropylenediamine-N-N'-disuccinic acid (HPDDS), diaminoalkyldi-(sulfosuccinic acid) (DDS), ethylenedicysteic acid (EDC), ethylenediamine-N-N'-bis(orthohydroxyphenyl)acetic acid (EDDHA), N-2-hydroxyethylamine-N,N-diacetic acid, glyceryl-iminodiacetic acid, iminodiacetic acid-N-2-hydroxypropylsulfonic acid, aspartic acid-N-carboxymethyl-N-2,5-hydroxypropyl-3-sulfonic acid, alanine-N,N'-diacetic acid, aspartic acid-N,N'-diacetic acid, aspartic acid-N-monoacetic acid, dipicolinic acid, as well as their salts and / or derivatives, geminal diphosphonic acids such as 1-hydroxyethane-1,1-diphosphonic acid (HEDP),their higher homologues with up to 8 carbon atoms as well as hydroxyl or amino group-containing derivatives thereof and 1-aminoethane-1,1-diphosphonic acid, its higher homologues with up to 8 carbon atoms as well as hydroxyl or amino group-containing derivatives, aminophosphonic acids such as ethylenediaminetetra(methylenephosphonic acid) (EDTMP), diethylenetriaminepenta(methylenephosphonic acid) (DTPMP) as well as their higher homologues, or nitrilotri(methylenephosphonic acid), phosphonopolycarboxylic acids such as 2-phosphonobutane-1,2,4-tricarboxylic acid, cyclodextrins, as well as alkali stannates (sodium stannate), alkali pyrophosphates (tetrasodium pyrophosphate, disodium pyrophosphate), alkali phosphates (sodium phosphate), and phosphoric acid as well as their salts. At the alkaline pH values ​​of the treatment solutions required according to the invention, these complexing agents are at least partially present as anions.whether they are introduced in the form of acids or salts. When used as salts, alkali, ammonium, or alkylammonium salts, especially sodium salts, are preferred. Complexing agents preferred according to the invention are nitrogen-containing polycarboxylic acids, especially EDTA, and phosphonates, preferably hydroxyalkane or aminoalkanephosphonates and especially 1-hydroxyethane-1,1-diphosphonate (HEDP) or its di- or tetrasodium salt and / or ethylenediaminetetramethylenephosphonate (EDTMP) or its hexasodium salt and / or diethylenetriaminepentamethylenephosphonate (DTPMP) or its hepta- or octosodium salt. The colorants according to the invention preferably contain further auxiliaries and additives. Thus, it has proven preferred according to the inventionif the agents contain at least one thickener. There are no fundamental restrictions regarding these thickeners. Both organic and purely inorganic thickeners can be used. According to a first preferred embodiment, the thickener is an anionic, synthetic polymer. Preferred anionic groups are the carboxylate and the sulfonate group. Examples of anionic monomers from which the polymeric anionic thickeners can consist are acrylic acid, methacrylic acid, crotonic acid, itaconic acid, maleic anhydride and 2-acrylamido-2-methylpropanesulfonic acid. The acidic groups can be wholly or partly sodium, potassium, ammonium,Mono- or triethanolammonium salt. Preferred monomers are maleic anhydride and, in particular, 2-acrylamido-2-methylpropanesulfonic acid and acrylic acid. Preferred anionic homopolymers are uncrosslinked and crosslinked polyacrylic acids. Allyl ethers of pentaerythritol, sucrose, and propylene can be preferred crosslinking agents. Such compounds are available, for example, under the trademark Carbopol. ® commercially available. Also preferred is the homopolymer of 2-acrylamido-2-methylpropanesulfonic acid, which is sold, for example, under the name Rheothik ®11-80 is commercially available. Within this first embodiment, it may further be preferable to use copolymers of at least one anionic monomer and at least one nonionic monomer. With regard to the anionic monomers, reference is made to the substances listed above. Preferred nonionic monomers are acrylamide, methacrylamide, acrylic acid esters, methacrylic acid esters, itaconic acid mono- and diesters, vinylpyrrolidinone, vinyl ethers, and vinyl esters. The anionic acrylic acid and / or methacrylic acid polymers or copolymers are preferably present in the agents according to the invention in an amount of 0.1 to 10 wt. %, particularly preferably 1 to 5 wt. %, based in each case on the weight of the agent. Preferred anionic copolymers are, for example, copolymers of acrylic acid, methacrylic acid, or their C1-C6 alkyl esters, as sold under the INCI declaration Acrylates Copolymers.A preferred commercial product is Aculyn, for example. ® 33 from Rohm & Haas. Also preferred are copolymers of acrylic acid, methacrylic acid or their C1-C6 alkyl esters and the esters of an ethylenically unsaturated acid and an alkoxylated fatty alcohol. Suitable ethylenically unsaturated acids are, in particular, acrylic acid, methacrylic acid, and itaconic acid; suitable alkoxylated fatty alcohols are, in particular, Steareth-20 or Ceteth-20. Such copolymers are marketed by Rohm & Haas under the trade name Aculyn. ® 22 and by National Starch under the trade names Structure ® 2001 and Structure ®3001. Preferred anionic copolymers are also acrylic acid-acrylamide copolymers and, in particular, polyacrylamide copolymers with monomers containing sulfonic acid groups. A particularly preferred anionic copolymer consists of 70 to 55 mol% acrylamide and 30 to 45 mol% 2-acrylamido-2-methylpropanesulfonic acid, with the sulfonic acid group being present wholly or partially as the sodium, potassium, ammonium, mono-, or triethanolammonium salt. This copolymer can also be crosslinked, with polyolefinically unsaturated compounds such as tetraallyloxythane, allyl sucrose, allyl pentaerythritol, and methylenebisacrylamide being used as crosslinking agents. One such polymer is used in the commercial products Sepigel £ 305 and Simulgel ® 600 from SEPPIC. The use of these compounds, which contain a hydrocarbon mixture (C 13 -C 14-isoparaffin or isohexadecane) and a non-ionic emulsifier (Laureth-7 or Polysorbate-80) has proven particularly advantageous within the scope of the invention. Polymers of maleic anhydride and methyl vinyl ether, particularly those with crosslinks, are also preferred thickeners. A maleic acid-methyl vinyl ether copolymer crosslinked with 1,9-decadiene is available under the name Stabileze. ® QM is commercially available. According to another embodiment, the thickener is a cationic synthetic polymer. Preferred cationic groups are quaternary ammonium groups. In particular, polymers in which the quaternary ammonium group is bonded via a C1-C4 hydrocarbon group to a polymer main chain composed of acrylic acid, methacrylic acid, or their derivatives have proven particularly suitable. Homopolymers of the general formula (HP-1), in which R1 = -H or -CH3, R2, R3 and R4 are independently selected from C1-C4 alkyl, -alkenyl or -hydroxyalkyl groups, m = 1, 2, 3 or 4, n is a natural number and X- is a physiologically acceptable organic or inorganic anion, as well as copolymers consisting essentially of the monomer units listed in formula (HP-1) and non-ionogenic monomer units, are particularly preferred cationic polymeric gel formers. Within the scope of these polymers, those for which at least one of the following conditions applies are preferred according to the invention: - R1 stands for a methyl group - R2, R3 and R4 stand for methyl groups - m has the value 2, Suitable physiologically acceptable counterions X- are, for example, halide ions, sulfate ions, phosphate ions, methosulfate ions and organic ions such as lactate, citrate, tartrate and acetate ions. Halide ions are preferred, in particular chloride.A particularly suitable homopolymer is poly(methacryloxyethyltrimethylammonium chloride), which can be crosslinked if desired, and has the INCI name Polyquaternium-37. Crosslinking can be achieved, if desired, using polyolefinically unsaturated compounds, for example divinylbenzene, tetraallyloxyethane, methylenebisacrylamide, diallyl ether, polyallylpolyglyceryl ether, or allyl ethers of sugars or sugar derivatives such as erythritol, pentaerythritol, arabitol, mannitol, sorbitol, sucrose, or glucose. Methylenebisacrylamide is a preferred crosslinking agent. The homopolymer is preferably used in the form of a non-aqueous polymer dispersion, which should have a polymer content of at least 30 wt.%. Such polymer dispersions are available under the names Salcare. £SC 95 (approx. 50% polymer content, additional components: mineral oil (INCI name: Mineral Oil) and tridecyl polyoxypropylene polyoxyethylene ether (INCI name: PPG-1-Trideceth-6)) and Salcare £SC 96 (approx. 50% polymer content, other components: mixture of diesters of propylene glycol with a mixture of caprylic and capric acid (INCI name: Propylene Glycol Dicaprylate / Dicaprate) and tridecyl polyoxypropylene polyoxyethylene ether (INCI name: PPG-1-Trideceth-6) commercially available. Copolymers with monomer units according to formula (HP-1) preferably contain acrylamide, methacrylamide, acrylic acid C1-C4 alkyl esters and methacrylic acid C1-C4 alkyl esters as non-ionic monomer units. Among these non-ionic monomers, acrylamide is particularly preferred. These copolymers can also be crosslinked, as described above in the case of the homopolymers. A preferred copolymer according to the invention is the crosslinked acrylamide-methacroyloxyethyltrimethylammonium chloride copolymer. Such copolymers in which the monomers are present in a weight ratio of approximately 20:80 are available commercially as approximately 50% non-aqueous polymer dispersion under the name Salcare£ SC 92. Non-ionic, fully synthetic polymers, such as polyvinyl alcohol or polyvinylpyrrolidinone, can also be used as additional optional thickeners. Preferred non-ionic, fully synthetic polymers are available, for example, from BASF under the trade name Luviskol. ®Such non-ionic polymers, in addition to their excellent thickening properties, also enable a significant improvement in the sensory feel of the resulting preparations. As inorganic thickeners, phyllosilicates (polymeric, crystalline sodium disilicates) have proven particularly suitable for the purposes of the present invention. Clays, in particular magnesium aluminum silicates, such as bentonite, especially smectites, such as montmorillonite or hectorite, which may optionally also be suitably modified, and synthetic phyllosilicates, such as the product sold by Süd Chemie under the trade name Optigel, are particularly suitable. ®Magnesium layered silicate sold by the company , are preferred. To further increase the performance of the oxidative coloring agents, at least one optionally hydrated SiO2 compound is preferably additionally added. According to the invention, it may be preferred to use the optionally hydrated SiO2 compounds in amounts of 0.05 wt.% to 15 wt.%, particularly preferably in amounts of 0.15 wt.% to 10 wt.%, and very particularly preferably in amounts of 0.2 wt.% to 5 wt.%, in each case based on the agents according to the invention. The amounts given here each reflect the content of the SiO2 compounds (without their water content) in the agents. With regard to the optionally hydrated SiO2 compounds, the present invention is in principle subject to no restrictions. Preference is given to silicic acids, their oligomers and polymers, and their salts. Preferred salts are the alkali metal salts, in particular the potassium and sodium salts.The sodium salts are very particularly preferred. The optionally hydrated SiO2 compounds can be present in various forms. According to the invention, the SiO2 compounds are preferably used in the form of silica gel or, more preferably, as waterglass. These SiO2 compounds can be partially present in aqueous solution. According to the invention, waterglasses consisting of a silicate of the formula (SiO2) are very particularly preferred. n (Na2O) m (K2O) pwhere n is a positive rational number and m and p are independently a positive rational number or 0, with the provisos that at least one of the parameters m or p is different from 0 and the ratio between n and the sum of m and p is between 1:4 and 4:1. Metasilicates are preferred in which the ratio between n and the sum of m and p is 1:2 or less. In addition to the components described by the empirical formula, the water glasses may contain small amounts of other additives, such as phosphates or magnesium salts. Water glasses which are particularly preferred according to the invention are manufactured, inter alia, by Henkel under the names Ferrosil ® 119, soda water glass 40 / 42, Portil ® A, Portil ® AW and Portil ® W and by Akzo under the name Britesil ®C20. The oxidative colorants are preferably packaged as flowable preparations. Furthermore, the agents according to the invention can contain other active ingredients, auxiliaries, and additives, such as, for example, nonionic polymers such as vinylpyrrolidinone / vinyl acrylate copolymers, polyvinylpyrrolidinone, vinylpyrrolidinone / vinyl acetate copolymers, polyethylene glycols, and polysiloxanes; - Silicones such as volatile or non-volatile, straight-chain, branched or cyclic, cross-linked or non-cross-linked polyalkylsiloxanes (such as dimethicones or cyclomethicones), polyarylsiloxanes and / or polyalkylarylsiloxanes, in particular polysiloxanes with organofunctional groups, such as substituted or unsubstituted amines (amodimethicones), carboxyl, alkoxy and / or hydroxyl groups (dimethicone copolyols), linear polysiloxane(A)-polyoxyalkylene(B) block copolymers, grafted silicone polymers with a non-silicone-containing, organic backbone or with a polysiloxane backbone,such as, for example, the commercial product Abil B 8832 from Degussa, sold under the INCI name Bis-PEG / PPG-20 / 20 Dimethicone, or mixtures thereof; - cationic polymers such as quaternized cellulose ethers, polysiloxanes with quaternary groups, dimethyldiallylammonium chloride polymers, acrylamide-dimethyldiallylammonium chloride copolymers, diethyl sulfate-quaternized dimethylaminoethyl methacrylate-vinylpyrrolidinone copolymers, vinylpyrrolidinone-imidazolinium methochloride copolymers and quaternized polyvinyl alcohol; - Structuring agents such as glucose, maleic acid and lactic acid, - hair conditioning compounds such as phospholipids, for example soy lecithin, egg lecithin and cephalins as well as silicone oils, - perfume oils, dimethyl isosorbide and cyclodextrins, - solvents and mediators such as ethanol, isopropanol, ethylene glycol, propylene glycol, glycerin and diethylene glycol, - fiber structure-improving agents, in particular mono-,Di- and oligosaccharides such as glucose, galactose, fructose, fructose and lactose, - quaternized amines such as methyl-1-alkylamidoethyl-2-alkylimidazolinium methosulfate - defoamers such as silicones, - dyes for coloring the product, - anti-dandruff active ingredients such as piroctone olamine, zinc omadine and climbazole, - amino acids and oligopeptides, in particular arginine and / or serine, - protein hydrolysates of animal and / or plant origin, such as elastin, collagen, keratin, silk and milk protein hydrolysates, or almond, rice, pea, potato and wheat protein hydrolysates, as well as in the form of their fatty acid condensation products or optionally anionically or cationically modified derivatives, - vegetable oils, for example macadamia nut oil, kukui nut oil, palm oil, Amaranth seed oil, peach kernel oil, avocado oil, olive oil, coconut oil, rapeseed oil, sesame oil, jojoba oil, soybean oil, peanut oil, evening primrose oil and tea tree oil - sunscreen,in particular derivatized benzophenones, cinnamic acid derivatives and triazines, - substances for adjusting the pH, such as common acids, in particular food acids and bases, - active ingredients such as panthenol, pantothenic acid, pantolactone, allantoin, pyrrolidinonecarboxylic acids and their salts as well as bisabolol, - polyphenols, in particular hydroxycinnamic acids, 6,7-dihydroxycoumarins, hydroxybenzoic acids, catechins, tannins, leucoanthocyanidins, anthocyanidins, flavanones, flavones and flavonols; - ceramides, preferably the sphingolipids such as ceramide I, ceramide II, ceramide 1, ceramide 2, ceramide 3, ceramide 5 and ceramide 6, or pseudoceramides, such as in particular N-(C8-C, 22 -acyl)- (C8-C 22-acyl)-hydroxyproline, - vitamins, provitamins and vitamin precursors, in particular those of groups A, B3, B5, B6, C, E, F and H, - plant extracts such as extracts from aloe vera, angelica, anise, apricot, benzoin, bergamot, birch, nettle, calmus, cassis, costus, marshmallow, oak bark, elemi, tarragon, spruce needles, galbanum, geranium, ginseng, grapefruit, guaiac wood, green tea, witch hazel, restharrow, hops, coltsfoot, ginger root, iris, jasmine, chamomile, cardamom, clover, burdock root, pine, kiwi, coconut, coriander, caraway, mountain pine, lavender, lemongrass, lily, lime, linden blossom, lychee, mace, mallow, almond, mango, lemon balm, melon, meristem, myrrh, Neroli, olibanum, opoponax, orange, patchouli, petitgrain, pine, thyme, rooibos, roses, rosemary, horse chestnut, sandalwood, sage, horsetail, yarrow, celery, fir, thyme, juniper, vine leaves, hawthorn, wheat, meadowfoam, ylang-ylang, cedar and lemon.- Cholesterol, - Thickeners such as sugar esters, polyol esters, or polyol alkyl ethers, - Fats and waxes such as spermaceti, beeswax, montan wax, and paraffins, - Fatty acid alkanolamides, - Swelling and penetrating agents such as glycerin, propylene glycol monoethyl ether, carbonates, bicarbonates, guanidines, ureas, and primary, secondary, and tertiary phosphates, - Opacifiers such as latex, styrene / PVP, and styrene / acrylamide copolymers, - Pearlescent agents such as ethylene glycol monostearate and distearate, and PEG-3 distearate, - Pigments, - Stabilizers for hydrogen peroxide and other oxidizing agents, - Propellants such as propane-butane mixtures, N2O, dimethyl ether, CO2, and air, - Antioxidants. The expert will select these additional substances based on the desired properties of the product. With regard to further optional components and the amounts of these components used, reference is expressly made to the relevant manuals known to the person skilled in the art, e.g. Kh.Schrader, Grundlagen und Rezepturen der Kosmetika, 2nd edition, Hüthig Buch Verlag, Heidelberg, 1989. The additional active ingredients and auxiliaries are preferably used in the agents according to the invention in amounts of 0.0001 to 10 wt. %, in particular 0.0005 to 5 wt. %, based on the total weight of the application mixture. Process for the oxidative coloring of keatin fibers The oxidative coloring agent according to the invention of the first subject matter of the invention is outstandingly suitable for use in corresponding coloring processes. A further subject matter of the present invention is therefore a process for the oxidative coloring of keratin fibers, in particular human hair, in which an agent as disclosed in detail in the description of the first subject matter of the invention is applied to the keratin fibers and rinsed out again after a contact time.While the agent is acting on the fiber, it can be advantageous to support the coloring process by applying heat. The heat can be applied using an external heat source, such as warm air from a hot air blower, or, particularly when coloring hair on a live test subject, using the test subject's body temperature. With the latter option, the area to be colored is usually covered with a hood. In particular, the temperature during the action time is between 10°C and 45°C, in particular between 20°C and 40°C. The coloring agents according to the invention produce intensive colorations even at physiologically acceptable temperatures below 45°C. They are therefore particularly suitable for coloring human hair. With regard to further preferred embodiments of the methods according to the invention, what has been said about the agents according to the invention applies mutatis mutandis.

Claims

Claims 1. A composition for the oxidative dyeing of keratinous fibers, in particular human hair, comprising in a cosmetic carrier (a) isatin and (b) at least one polymer from the group consisting of xanthan gum, algin, carrageenan, cetyl hydroxyethyl cellulose, carboxymethylcellulose, tragacanth, karaya gum, ghatti gum, agar, chitin, chitosan, gum arabic, gellan gum, guar gum, tamarind bean gum, locust bean gum and their physiologically acceptable salts.

2. The composition according to claim 1, characterized in that it contains – based on the total weight of the composition – 0.001 to 10 wt.%, preferably 0.01 to 5 wt.%, more preferably 0.1 to 3.5 wt.% and most preferably 0.15 to 2.5 wt.% isatin (a).

3. A composition according to any one of claims 1 to 2, characterized in that it contains at least one polymer (b) selected from the group consisting of xanthan gum, alginate, carrageenan, cetyl hydroxyethyl cellulose, carboxymethylcellulose and their physiologically acceptable salts. 4.A composition according to any one of claims 1 to 3, characterized in that it contains – based on the total weight of the composition – one or more polymers (b) in a total amount of 0.01 to 10.0 wt.%, preferably 0.1 to 5.0 wt.%, more preferably 0.2 to 2.5 wt.% and most preferably 0.3 to 1.5 wt.%.

5. Composition according to any one of claims 1 to 4, characterized in that it contains at least one developer-type oxidation dye precursor (c) selected from the group consisting of p-toluenediamine, 2-methoxymethyl-p-phenylenediamine, 2-(2-hydroxyethyl)-p-phenylenediamine, N,N-bis-(2-hydroxyethyl)-p-phenylenediamine, p-phenylenediamine, 4-amino-3-methylphenol, p-aminophenol, 4,5-diamino-1-(2-hydroxyethyl)pyrazole and their physiologically acceptable salts. 6.A composition according to any one of claims 1 to 5, characterized in that it contains – based on the total weight of the composition – one or more developer-type oxidation dye precursors (c) in a total amount of 0.001 to 10.0 wt.%, preferably 0.01 to 6.0 wt.%, more preferably 0.1 to 5.0 wt.%, and most preferably 0.15 to 4.7 wt.%. A composition according to any one of claims 1 to 6, characterized in that it contains at least one coupler-type oxidation dye precursor (d) selected from the group consisting of 3-Aminophenol, 5-Amino-2-methylphenol, 3-Amino-2-chlor-6-methylphenol, 2-Hydroxy-4-amino- phenoxyethanol, 5-Amino-4-chlor-2-methylphenol, 5-(2-Hydroxyethyl)-amino-2-methylphenol, 2,4-Dichlor-3-aminophenol, 2-Aminophenol, 3-Phenylendiamin, 2-(2,4-Diaminophenoxy)ethanol, 1,3-Bis(2,4-diaminophenoxy)propan, 1-Methoxy-2-amino-4-(2-hydroxyethylamino)benzol, 1,3- Bis(2,4-diaminophenyl)propan, 2,6-Bis(2'-hydroxyethylamino)-1-methylbenzol, 1-Amino-3-bis-(2- hydroxyethyl)aminobenzol, 2-Amino-3-hydroxypyridin, 3-Amino-2-methylamino-6- methoxypyridin, 2,6-Dihydroxy-3,4-dimethylpyridin, 3,5-Diamino-2,6-dimethoxypyridin, 1-Phenyl- 3-methylpyrazol-5-on, 1-Naphthol, 1,5-Dihydroxynaphthalin, 2,7-Dihydroxynaphthalin, 1,7-Di- hydroxynaphthalin, 1,8-Dihydroxynaphthalin, 4-Hydroxyindol, 6-Hydroxyindol, 7-Hydroxyindol, 4- Hydroxyindolin, 6-Hydroxyindolin, 7-Hydroxyindolin oder Gemischen dieser Verbindungen oder deren physiologisch verträglichen Salzen. 8.A composition according to any one of claims 1 to 7, characterized in that it contains – based on the total weight of the composition – one or more oxidation dye precursors of coupler type (d) in a total amount of 0.001 to 10 wt.%, preferably 0.01 to 5 wt.%, more preferably 0.1 to 3.5 wt.%, and most preferably 0.15 to 2.5 wt.%.

9. A composition according to any one of claims 1 to 8, characterized in that – based on the total weight of the composition – the total amount of couplers contained in the composition from the group of resorcinols, in particular from the group consisting of resorcinol, 2-methylresorcinol, and 4-chlororesorcinol, is below 0.1 wt.%, preferably below 0.05 wt.%, most preferably below 0.01 wt.%, and most preferably 0 wt.%. 10.A composition according to any one of claims 1 to 9, characterized in that it contains at least one oxidizing agent (e) from the group consisting of hydrogen peroxide and its adsorption products to organic or inorganic compounds. A composition according to any one of claims 1 to 10, characterized in that it contains at least one alkalizing agent (f) from the group consisting of ammonia, monoethanolamine, 2-amino-2-methylpropanol, arginine, lysine, ornithine, and histidine. A composition according to any one of claims 1 to 11, characterized in that it contains at least one surfactant selected from the group consisting of anionic, amphoteric, zwitterionic, and nonionic surfactants.

13. A composition according to any one of claims 1 to 12, characterized in that – based on the total weight of the composition – the total amount of fat components contained in the composition is below 25% by weight, preferably below 20% by weight, more preferably below 15% by weight, and most preferably below 13% by weight.

14. A method for the oxidative dyeing of keratinous fibers, in particular human hair, in which a composition according to any one of claims 1 to 13 is applied to the keratinous fibers and rinsed off after an exposure time.

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