Hair dye with cationic polymer

Abstract

Cosmetic agent for changing the color of keratin fibers, comprising in a cosmetically acceptable carrier a) at least one compound selected from the group consisting of oxidation dye precursors, direct dyes and mixtures thereof, b) a quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate, c) 3.0 to 8.0% by weight, based on the total weight of the cosmetic product, of partial esters and / or polyol partial esters and d) 10 to 25% by weight, based on the total weight of the cosmetic product, of 2-octyldodecanol and / or cetearyl alcohol.

Description

The present invention relates to a cosmetic agent for changing the colour of keratin fibres with a specific cationic polymer. The invention further comprises a packaging unit (kit-of-parts) and methods for coloring keratin fibers with the cosmetic agent.Human hair is nowadays treated in a variety of ways with hair cosmetic preparations. These include, for example, the cleansing of the hair with shampoos, the care and regeneration with rinses and courses, and the bleaching, coloring and shaping of the hair with colorants, tints, waving agents and styling preparations. Agents for changing or nuancing the color of the hair head play an outstanding role. If one sees from the bleaching agents which bring about oxidative lightening of the hair by degradation of the natural hair dyes, then oxidative hair coloring is of important importance in the field of hair color change.For permanent, intensive dyeings having corresponding fastness properties, so-called oxidation dyeing compositions 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 atmospheric oxygen with one another or with coupling with one or more coupler components. The oxidation dyeing compositions are distinguished by excellent, long-lasting dyeing results. For naturally acting dyeings, however, it is usually necessary to use a mixture of a relatively large number of oxidation dye precursors (OFV); in many cases, direct dyes (DZ) are furthermore used for shading.Oxidative colorants for stabilizing the dye precursors during storage and for accelerating the reaction during oxidative use usually have an alkaline pH which is adjusted with alkalinizing agents, such as alkanolamines, ammonia or inorganic bases.The abovementioned oxidation dye precursors (OFV) and alkalinizing agents are usually incorporated into a cosmetically suitable carrier, such as, for example, a cream or a gel. The carrier ensures a homogeneous distribution and a sufficient dwell time of the coloring agent on the hair.Commercial oxidation colorants are usually formulated in product series comprising a standardized carrier which can be combined with the shade-specific OFV combination and alkalinizing agents as freely as possible.Consumers can generally take the dyeing of the hair that can be achieved with a hair dye from a reference on the packaging of the hair dye and / or from a color card enclosed in the packaging. For the consumer it is very important that the result of the coloring corresponds as exactly as possible to the color specified by the manufacturer.The result of the coloration depends not only on the combination of the OFV and optionally DZ used, but is also influenced by the ingredients of the carrier. For example, the dyes formed during the course of color development under the influence of the oxidizing agent or used directly may have a clearly different capacity for absorption onto the fiber; the carrier ingredients may also have a different effect on each dye.Hair colorants are therefore extensively and laboriously tested prior to introduction on the market for the colour which can be achieved and for a multiplicity of application properties. These tests take into account the interactions between OFV and carrier only for a particular carrier at a time. Manufacturers usually wish to adapt a series of hair colorants specifically to the specific requirements of certain groups of consumers by adding appropriate active or care substances to the standardized carrier. For consumers with more heavily damaged hair, for example, the addition of one or more care active ingredients with hair-repairing action would be advisable; for consumers with fine hair, the addition of one or more active ingredients which increase the hair fill / volume would be advisable, while an addition of too much conditioning active ingredient would further weight the hair.However, the addition of such additives can lead to differences occurring between the hair coloration achieved with the additive-free (standard) carrier and the hair coloration achieved with the additive-containing carrier. Such color differences are referred to as "color shift" in the sense of the present application. This color shift, also referred to as dE or ΔE, can be determined very well colorimetrically with a colorimeter with which the colors in the L*,a*,b* color space are measured, for example with a colorimeter from Datacolor, Spectraflash 450 type.The L*,a*,b* color space is understood to mean the CIELAB color space. The L value represents the brightness of the color (black-and-white axis); the greater the value for L, the brighter the color. The a value stands for the red-green axis of the system; the greater this value, the more the coloration is shifted to the red. The b value represents the yellow-blue axis of the system; the greater this value, the more the color is shifted to yellow.The color shift ΔE, i.e. the color difference between two (hair) colors, for each of which an L*,a*,b* value combination was determined, is calculated according to the following formula:The larger the value for ΔE, the more pronounced is the color difference or "color shift". Color differences with ΔE<1 are not perceptible to the human eye. Color differences with ΔE<2 are visible to the trained eye. Color differences with ΔE>2 are also visible to the unsulted eye.In the worst case, the addition of an additive to a colorant carrier causes a color shift with respect to the additive-free carrier (standard) of ΔE>2, which is also visible to the untraveled eye of the consumer. In order to avoid that every additive change of the standard carrier requires extensive tests with regard to the achievable hair coloration and, if appropriate, the fastness properties, it is therefore desirable to identify active and care substances for the hair whose addition causes no, or at least only a slight, color shift.The present application was therefore based on the object of providing cosmetic agents for changing the color of keratin fibers, which contain one or more hair-conditioning active ingredients which cause no or only minimal color shift.It has now surprisingly been found that the addition of at least one specific cationic polymer in cosmetic agents for coloring keratin fibers, in particular human hair, leads to improved conditioning, in particular to an increased volume, with at the same time a color shift of ΔE<2 not visible to the unsulted eye.A first subject of the invention is a cosmetic agent for changing the color of keratin fibers, comprising, in a cosmetically compatible carrier, a) at least one compound selected from the group consisting of oxidation dye precursors, substantive dyes and mixtures thereof, and b) a quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate, c) 3.0 to 8.0% by weight, based on the total weight of the cosmetic agent, of partial ester and / or polyol partial ester, and d) 10 to 25% by weight, based on the total weight of the cosmetic agent, of 2-octyldodecanol and / or cetearyl alcohol.The term "keratin fibers or also keratin fibers" is to be understood as meaning fur, wool, feathers and human hair. In the context of the present invention, it is particularly preferred if the cosmetic agents are used for coloring human hair.In addition, the terms "volume" or "body" in the context of the present invention are understood to mean the structural strength of a fibrous mass. A higher volume or body provides more bulk to fibers.The compositions contain a cosmetic carrier. The cosmetic carrier is preferably aqueous, alcoholic or aqueous-alcoholic. Within the scope of the present invention, creams, emulsions, gels or surfactant-containing foaming solutions, such as shampoos, foam aerosols or other preparations which are suitable for application to the hair, can be used, for example.An aqueous carrier in the context of the invention comprises at least 30% by weight, in particular at least 50% by weight, of water, based in each case on the total weight of the cosmetic agent.For the purposes of the present invention, aqueous-alcoholic carriers are understood to mean water-containing compositions comprising a C 1- C 4- alcohol in a total amount of 3 to 90% by weight, in each case based on the total weight of the cosmetic agent, in particular ethanol or isopropanol.The compositions may additionally comprise further organic solvents, such as, for example, methoxybutanol, ethyldiglycol, 1,2-propyleneglycol, n-propanol, n-butanol, n-butyleneglycol, glycerol, diethyleneglycol monoethyl ether and diethyleneglycol mono-n-butyl ether. Preference is given here to all water-soluble organic solvents, the solvent being present in a total amount of from 0.1 to 30% by weight, preferably from 1 to 20% by weight, in particular from 2 to 10% by weight, based in each case on the total weight of the cosmetic agent.The cosmetic agent contains as the first essential constituent a) a compound selected from the group of oxidation dye precursors (OFV), direct dyes (DZ) and mixtures thereof.In a preferred embodiment, agents contain at least one oxidation dye precursor.Oxidation dye precursors can be classified into two categories due to their reaction behavior, so-called developer components and coupler components. Developer components can form the actual dye with themselves. They can therefore be present as sole compounds in the cosmetic agent. In a preferred embodiment, the cosmetic agents therefore contain at least one oxidation dye precursor of the developer type. However, it can also be provided in the context of the present invention that the cosmetic agents contain at least one oxidation dye precursor of the coupler type. Particularly good results with regard to the dyeing of keratin fibers are obtained if the cosmetic agents contain at least one oxidation dye precursor of the developer type and at least one oxidation dye precursor of the coupler type.The developer and coupler components are usually used in free form. In the case of substances having amino groups, however, it may be preferred to use their salt form, in particular in the form of the hydrochlorides and hydrobromides or the sulfates.Cosmetic agents are preferred which contain the developer and / or coupler components in each case in a total amount of 0.001 to 10 wt. %, preferably of 0.01 to 8 wt. %, preferably of 0.1 to 5 wt. %, in particular of 0.5 to 3 wt. %, in each case based on the total weight of the cosmetic agent.Suitable oxidation dye precursors of the developer type are, for example, p-phenylenediamine and derivatives thereof. Preferred p-phenylenediamines are selected from one or more compounds of the group formed from p-phenylenediamine, p-tolylenediamine, 2-chloro-p-phenylenediamine, 2,3-dimethyl-p-phenylenediamine, 2,6-dimethyl-p-phenylenediamine, N,N-bis-(2-hydroxyethyl)-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-methyl-phenyl)-N-[3-(1H-imidazol-1-yl)propyl]amine and their physiologically tolerable salts.It may furthermore be preferred to use, as developer component, compounds which contain at least two aromatic nuclei which are substituted by amino and / or hydroxyl groups. Preferred dinuclear 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 tolerable salts.It may furthermore be preferred to use a p-aminophenol derivative or one of its physiologically tolerable salts as developer component. 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 physiologically acceptable salts thereof.Furthermore, the developer component can be selected from o-aminophenol and derivatives thereof, preferably from 2-amino-4-methylphenol, 2-amino-5-methylphenol, 2-amino-4-chlorophenol and / or physiologically acceptable salts thereof.Furthermore, the developer component can be selected from heterocyclic developer components, such as pyrimidine derivatives, pyrazole derivatives, pyrazolopyrimidine derivatives or their physiologically tolerable salts. Preferred pyrimidine derivatives are 2,4,5,6-tetraaminopyrimidine, 4-hydroxy-2,5,6-triaminopyrimidine and their physiologically tolerable salts. A preferred pyrazole derivative is 4,5-diamino-1-(2-hydroxyethyl)pyrazole and its physiologically tolerable salts. Pyrazolo[1,5-a]pyrimidines are particularly preferred as pyrazolopyrimidines.Preferred developer type oxidation dye precursors are selected from the group consisting of p-phenylenediamine, p-tolylenediamine, 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)-1,4,7,10-tetraoxadecane, p-aminophenol, 4-amino-3-methylphenol, 4-amino-2-aminomethylphenol, 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-tolylenediamine, 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 also their physiologically tolerable salts.According to a further preferred embodiment of the present invention, the cosmetic agent additionally comprises at least one coupler component as oxidation dye precursor in addition to at least one developer component. Coupler components used are generally m-phenylenediamine derivatives, naphthols, resorcinol and resorcinol derivatives, pyrazolones and m-aminophenol derivatives.Preferred coupler components are selected from (A) m-aminophenol and derivatives thereof, 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 derivatives thereof, such as 2-amino-5-ethylphenol, (C) m-diaminobenzene and derivatives thereof, 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 derivatives thereof, (E) di- and 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-dimethoxypyridine, (G) naphthalene derivatives, such as 1-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 physiologically tolerable salts thereof.Preferred coupler components are 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, 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-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-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 the physiologically tolerable salts of the aforementioned compounds.Particularly preferred coupler components are resorcinol, 2-methylresorcinol, 4-chroresorcinol, 5-amino-2-methylphenol, 3-aminophenol, 2-(2,4-diaminophenoxy)ethanol, 1,3-bis-(2,4-diaminophenoxy)propane, 1-methoxy-2-amino-4-(2'-hydroxyethylamino)benzene, 2-amino-3-hydroxypyridine, 2,6-dihydroxy-3,4-dimethylpyridine, 1,5-dihydroxynaphthalene, 2,7-dihydroxynaphthalene and 1-naphthol and also their physiologically tolerable salts.In a particularly preferred embodiment of the present invention, the cosmetic agents are characterized in that they comprise, as oxidation dye precursor, at least one developer component selected from the group of p-phenylenediamine, p-tolylenediamine, N,N-bis(2-hydroxyethyl)amino-p-phenylenediamine, 1,3-bis[(2-hydroxyethyl-4'-aminophenyl)amino]propan-2-ol, 1,10-bis(2',5'-diaminophenyl)-1,4,7,10-tetraoxadecane, 4-aminophenol, 4-amino-3-methylphenol, bis(5-amino-2-hydroxyphenyl)methane, 2,4,5,6-tetraaminopyrimidine, 2-hydroxy-4,5,6-triaminopyrimidine, 4,5-diamino-1-(2-hydroxyethyl)pyrazole, their physiologically tolerable salts and mixtures thereof, and at least one coupler component selected from the group of resorcinol, 2-Methylresorcinol, 5-methylresorcinol, 2,5-dimethylresorcinol, 4-chlororesorcinol, resorcinol monomethyl ether, 5-aminophenol, 5-amino-2-methylphenol, 5-(2-hydroxyethyl)amino-2-methylphenol, 3-amino-4-chloro-2-methylphenol, 3-amino-2-chloro-6-methylphenol, 3-amino-2,4-dichlorophenol, 2,4-diaminophenoxyethanol, 2-amino-4-(2'-hydroxyethyl)amino anisole sulfate, 1,3-bis-(2,4-diaminophenoxy)propane, 2-amino-3-hydroxypyridine, 2-methylamino-3-amino-6-methoxypyridine, 2,6-dihydroxy-3,4-dimethylpyridine, 3,5-diamino-2,6-dimethoxypyridine, 1-naphthol, 2-methyl-1-naphthol, 1,5-dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 1-phenyl-3-methylpyrazol-5-one, 2,6-bis[(2'-hydroxyethyl)amino]toluene, 4-hydroxyindole, 6-hydroxyindole, 6-hydroxybenzomorpholine, their physiologically tolerable salts and mixtures thereof.In order to obtain a balanced and subtil shade formation, it can also be provided in the context of the present invention that the cosmetic agents with OFV additionally comprise at least one substantive dye. Alternatively, cosmetic agents are also included in which the color change originates only from substantive dyes.Substantive dyes are dyes which are applied directly to the hair and do not require an oxidative process for forming the color. Substantive dyes are usually nitrophenylenediamines, nitroaminophenols, azo dyes, anthraquinones or indophenols.Substantive dyes can be divided into anionic, cationic, and nonionic substantive dyes.Preferred anionic substantive dyes are the compounds known under the names 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.Preferred cationic substantive dyes are cationic triphenylmethane dyes, such as Basic Blue 7, Basic Blue 26, Basic Violet 2 and Basic Violet 14, and aromatic systems substituted with 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, and 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 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, 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-nitrophenyl)amino]benzoic acid, 6-nitro-1,2,3,4-tetrahydroquinoxaline, 2-hydroxy-1,4-naphthoquinone, picraminic acid and salts thereof, 2-amino-6-chloro-4-nitrophenol, 4-ethylamino-3-nitrobenzoic acid and 2-chloro-6-ethylamino-4-nitrophenol.Furthermore, natural dyes can also be used as substantive dyes, as are contained, for example, in henna red, henna neutral, henna black, chamomile flower, sandalwood, black tea, walnut, buckthorn bark, sage, bluewood, madder root, catechin and alkanna root.The cosmetic agent preferably contains the substantive dyes in a total amount of 0.001 to 10 wt %, preferably 0.01 to 8 wt %, preferably 0.1 to 5 wt %, in particular 0.5 to 3 wt %, in each case based on the total weight of the cosmetic agent.As second essential constituent b), the cosmetic agents comprise at least one quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate.The ratio of vinyl pyrrolidone to dimethylaminoethyl methacrylate in the copolymer can vary within wide ranges. It may be preferred that the proportion of vinylpyrrolidone is greater than the proportion of dimethylaminoethyl methacrylate. It may be particularly preferred for the ratio of vinylpyrrolidone to dimethylaminoethyl methacrylate to be in the range from 80:20.The copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate is preferably quaternized with dimethyl sulfate and / or diethyl sulfate, with diethyl sulfate being preferred. Copolymers of vinylpyrrolidone and dimethylaminoethyl methacrylate quaternized with diethyl sulfate are also known under the INCI name "Polyquaternium-11".The amount of quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate in the cosmetic agent is preferably 0.1 to 10% by weight and more preferably 0.25 to 5% by weight, in each case based on the total weight of the cosmetic agent. High amounts of quaternized copolymer of vinyl pyrrolidone and dimethylaminoethyl methacrylate can result in large, partially visible color changes without further increasing conditioning performance, particularly the volume of keratin fibers treated. An optimum ratio of volume increase to colour change is obtained when the amount of quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate in the cosmetic agent is from 0.5 to 1.5 wt.%, based on the total weight of the cosmetic agent.The cosmetic agents may contain further active substances and additives. It is therefore preferred in the context of the present invention if the cosmetic agent additionally comprises at least one further compound selected from the group of (i) thickeners; (ii) linear or branched, saturated or unsaturated alcohols having 8 to 20 carbon atoms; (iii) surfactants, in particular amphoteric surfactants; (iv) alkalinizing agents; (v) oils; and (vi) mixtures thereof.The cosmetic agents are preferably formulated as flowable preparations. In this case, the cosmetic agents should be formulated such that they can be applied and distributed well at the place of application, on the one hand, but are sufficiently viscous, on the other hand, such that they remain at the place of action during the action time and do not run.It has therefore proved advantageous if the cosmetic agents comprise at least one thickener from the group of (i) anionic, synthetic polymers; (ii) cationic, synthetic polymers; (iii) naturally occurring thickeners, such as nonionic guar gums, scleroglucangum or xanthan gums, gum arabic, ghatti gum, karaya gum, tragacanth gum, carrageenan gum, agar agar, locust bean gum, pectins, alginates, starch fractions and derivatives, such as amylose, amylopectin and dextrins, and cellulose derivatives, such as methylcellulose, carboxyalkyl celluloses and hydroxyalkyl celluloses; (iv) nonionic, synthetic polymers, such as polyvinyl alcohol or polyvinyl pyrrolidinone; (v) inorganic thickeners, in particular sheet silicates such as bentonite, in particular smectites such as montmorillonite or hectorite; and (vi) mixtures thereof. The total amount of thickener is preferably from 0.0005 to 5.0% by weight, more preferably from 0.005 to 1.0% by weight and particularly preferably from 0.008 to 0.01% by weight, in each case based on the total weight of the cosmetic agent.The cosmetic agent further contains 2-octyldodecanol and / or cetearyl alcohol in a total amount of 10 to 25 wt %, in particular 12 to 20 wt %, in each case based on the total weight of the cosmetic agent.The cosmetic agents further comprise at least one partial ester or polyol partial ester. Such partial esters are in particular the mono- and diesters of glycerol or the monoesters of propylene glycol or the mono- and diesters of ethylene glycol or the mono-, di-, tri- and tetraesters of pentaerythritol each with linear saturated C 12- C 30- carboxylic acids which may be hydroxylated, in particular those with palmitic and stearic acid, the sorbitan mono-, di- or triesters of linear saturated C 12- C 30- carboxylic acids which may be hydroxylated, in particular those of myristic acid, palmitic acid, and the like, Stearic acid or mixtures of these fatty acids and the methyl glucose mono- and diesters of linear saturated C 12- C 30- carboxylic acids which may be hydroxylated. The polyol partial esters are preferably selected from glycerol monostearate, glycerol monopalmitate, glycerol 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, glycerol distearate, and glycerol dipalmitate. The partial esters or polyol partial esters are each present in a total amount of 3.0 to 8.0% by weight, based on the total weight of the cosmetic agent.Furthermore, it can be provided that the cosmetic agents contain at least one surfactant.According to a preferred embodiment of the present invention, the cosmetic agents contain at least one amphoteric surfactant in a total amount of 0.1 to 5.0% by weight, in particular of 0.2 to 2.0% by weight, in each case based on the total weight of the cosmetic agent. Amphoteric or zwitterionic surfactants are those surface-active compounds which have at least one quaternary ammonium group and at least one -COO (-)- or -SO3 (-)- group.In the context of the present invention, the following compounds are particularly preferred as amphoteric surfactants:alkylbetaines having 8 to 20 carbon atoms in the alkyl group,amidopropylbetaines having 8 to 20 carbon atoms in the acyl group,sulfobetaines having 8 to 20 carbon atoms in the acyl group; andAmphoacetates or amphodiacetates having 8 to 20 carbon atoms in the acyl group.In a particularly preferred embodiment, the cosmetic agents contain as surfactant at least one amphoteric surfactant selected from amidopropylbetaines having 9 to 13 carbon atoms in the acyl group, in a total amount of 0.1 to 5.0% by weight, in particular of 0.2 to 2.0% by weight, in each case based on the total weight of the cosmetic agent.Furthermore, it can be provided that the cosmetic agents contain at least one ethoxylated nonionic surfactant. It has proven particularly advantageous if the ethoxylated nonionic surfactant has an HLB value above 10, preferably above 13. For this purpose, it is necessary for the nonionic surfactant to have a sufficiently high degree of ethoxylation. In this context, the cosmetic agent therefore contains as 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, arachidyl alcohol and behenyl alcohol, the addition products of 20 to 60 mol ethylene oxide with castor oil and hydrogenated castor oil are particularly suitable. The at least one ethoxylated nonionic surfactant is preferably selected from surfactants with the INCI name Ceteth-12, Steareth-12, Ceteareth-12, Ceteeth-20, Steareth-20, Ceteareth-20, Ceteeth-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, particularly preferably selected from Ceteeth-20, Steareth-20, Ceteareth-20, Ceteeth-30, Steareth-30 and Ceteareth-30.Cosmetic agents within the scope of the present invention generally have a basic pH, in particular between pH 8.0 and pH 12. These pH values are required to ensure an opening of the outer scale layer (cuticula) and to allow penetration of the oxidation dye precursors and / or the oxidizing agent into the hair.The adjustment of the aforementioned pH can preferably be effected using an alkalinizing agent. In the context of the present invention, the alkalinizing agent is selected from the group of (i) inorganic alkalinizing agents; (ii) organic alkalinizing agents; and (iii) mixtures thereof, and is present in a total amount of from 1.5 to 9.5% by weight, preferably from 2.5 to 8.5% by weight, preferably from 3.0 to 8.0% by weight, in particular from 3.5 to 7.5% by weight, based in each case on the total weight of the cosmetic agent.Preferred inorganic alkalinizing agents are selected from the group which is formed from ammonia or ammonium hydroxide, i.e. 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 alkalinizing agent. Ammonia is particularly preferably present in a total amount of from 0.1 to 20% by weight, preferably from 0.5 to 10% by weight, in particular from 1.0 to 7.0% by weight, based in each case on the total weight of the cosmetic agent.Preferred organic alkalinizing agents are selected from at least one alkanolamine. preferred alkanolamines are selected from alkanolamines from primary, secondary or tertiary amines having a C 2- C 6- alkyl parent structure which carries at least one hydroxyl group. Particularly preferred alkanolamines are selected from the group formed by 2-aminoethan-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-methylpropanol, 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, N,N-dimethylethanolamine, triethanolamine, Diethanolamine and triisopropanolamine. very particularly preferred alkanolamines are selected from the group of 2-aminoethan-1-ol (monoethanolamine), 2-amino-2-methylpropan-1-ol, 2-amino-2-methylpropan-1,3-diol and triethanolamine. Particularly preferred cosmetic agents contain a mixture of monoethanolamine and 2-amino-2-methylpropan-1-ol. The at least one alkanolamine is preferably present in a total amount of from 0.05 to 15% by weight, preferably from 0.5 to 10% by weight, in particular from 3.5 to 7.5% by weight, based in each case on the total weight of the cosmetic agent.Further preferred organic alkalinizing agents are selected from basic amino acids, particularly 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. Particularly preferred basic amino acids are selected from L-arginine, D-arginine and D / L-arginine. Preferred cosmetic agents contain at least one alkalinizing agent other than alkanolamines and ammonia in a total amount of 0.05 to 5.0 wt. %, in particular 0.5 to 3.0 wt. %, in each case based on the total weight of the cosmetic agent.In a particularly preferred embodiment, the cosmetic agents contain as alkalinizing agent a mixture of at least two alkanolamines different from one another, in particular monoethanolamine and 2-amino-2-methylpropan-1-ol, in a total amount of 0.05 to 15 wt %, preferably 0.5 to 10 wt %, in particular 3.5 to 7.5 wt %, in each case based on the total weight of the cosmetic agent.The pH of the cosmetic agents, measured at 22° C., is preferably from 8 to 12, preferably from 9.5 to 12, preferably from 10 to 11.5, in particular from 10.5 to 11.In the context of the present invention, it may further be preferred that the cosmetic agents comprise at least one oil selected from the group of sunflower oil, corn oil, soybean oil, pumpkin kernel oil, grapeseed oil, sesame oil, hazelnut oil, apricot kernel oil, macadamia nut oil, arara oil, castor oil, avocado oil and mixtures thereof, in a total amount of from 0.1 to 10 wt %, preferably from 0.2 to 5.0 wt %, in particular from 0.5 to 2.0 wt %, in each case based on the total weight of the cosmetic agent. The use of an aforementioned oil achieves a care effect which does not have a negative effect on the volume of the keratin fibers.The cosmetic agents particularly preferably contain grape seed oil in a total amount of 0.1 to 10 wt %, preferably of 0.2 to 5.0 wt %, in particular of 0.5 to 2.0 wt %, in each case based on the total weight of the cosmetic agent.According to a particularly preferred embodiment of the present invention, the cosmetic agents present as an oil-in-water emulsion contain-in each case based on the total weight of the cosmetic agentscetearyl alcohol in a total amount of 2.0 to 20 wt %, in particular of 5.0 to 12 wt %, furthermoremixtures of glycerol monostearate, glycerol monopalmitate, glycerol distearate and glycerol dipalmitate in a total amount of 0.5 to 10% by weight, preferably 3.0 to 8.0% by weight, furthermoreat least one amphoteric surfactant selected from amidopropylbetaines having 9 to 13 carbon atoms in the acyl group, in a total amount of 0.1 to 5.0% by weight, in particular of 0.2 to 2.0% by weight, furthermorea mixture of at least two alkanolamines different from one another, in particular monoethanolamine and 2-amino-2-methylpropan-1-ol, in a total amount of from 0.05 to 15% by weight, preferably from 0.5 to 10% by weight, in particular from 3.5 to 7.5% by weight, andGrape seed oil in a total amount of 0.1 to 10 wt %, preferably of 0.2 to 5.0 wt %, in particular of 0.5 to 2.0 wt %.Oxidative dye compositions can also be prepared directly prior to use from two or more separately packaged compositions. This is particularly suitable for separating incompatible ingredients in order to avoid a premature reaction. Separation into multicomponent systems is preferred in particular where incompatibilities of the ingredients are to be expected or feared. The oxidative coloring composition is prepared by the consumer directly before 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 is initially present separately from an oxidizing agent preparation containing at least one oxidizing agent.The present invention therefore further provides a packaging unit (kit-of-parts), comprising - packaged separately from one another - a) at least one container (C1) comprising a cosmetic agent for changing the color of keratin fibers, and b) at least one container (C2) comprising an oxidizing agent preparation which comprises, in a cosmetically compatible carrier, at least one oxidizing agent in a total amount of from 0.5 to 7.0% by weight, preferably from 1.0 to 7.0% by weight, in particular from 3.0 to 7.0% by weight, in each case based on the total weight of the oxidizing agent preparation, and at least one acid.The use of the at least one quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate in combination with certain amounts of oxidizing agent results, when using the abovementioned packaging unit for coloring keratin fibers, surprisingly in an increased conditioning, in particular in an increased volume, without, however, a color shift of ΔE>2 perceptible to the unsulted human eye occurring as a result of the addition of the quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate.The term "container" is understood within the scope of the present invention to mean a casing which is present in the form of an optionally resealable bottle, a tube, a can, a sachet, a sachet or similar casings. No limits are placed on the wrapping material. Preferably, however, these are envelopes made of glass or plastic.The oxidizing agents in the context of the present invention are different from atmospheric oxygen. Oxidizing agents which can be used are hydrogen peroxide and its solid addition products with organic and inorganic compounds. Suitable solid addition products are, in particular, the addition products with urea, melamine, polyvinylpyrrolidinone and sodium borate. Hydrogen peroxide and / or one of its solid addition products to organic or inorganic compounds are particularly preferred as oxidizing agents. The oxidizing agent is therefore preferably selected from the group of persulfates, chlorites, hydrogen peroxide and addition products of hydrogen peroxide with urea, melamine and sodium borate, in particular hydrogen peroxide.A particularly preferred embodiment of the present invention is thus characterized in that hydrogen peroxide is contained as oxidizing agent in a total amount of 0.5 to 13 wt %, preferably of 1.0 to 13 wt %, in particular of 3.0 to 13 wt %, in each case based on the total weight of the oxidizing agent preparation. The calculation of the total amount here refers to 100% H 2 O 2.The oxidizing agent preparations can furthermore contain water in a total amount of 40 to 98% by weight, in particular 65 to 85% by weight, in each case based on the total weight of the oxidizing agent preparation.According to a particularly preferred embodiment of the present invention, the oxidizing agent preparations comprise-in each case based on the total weight of the oxidizing agent preparationsat least one linear saturated alkanol having 12 to 30 carbon atoms in a total amount of 0.1 to 10% by weight, preferably of 0.5 to 5.0% by weight, in particular of 1.0 to 4.0% by weight, furthermoreat least one ethoxylated nonionic surfactant, which is preferably selected from surfactants with the INCI name Ceteth-12, Steareth-12, Ceteareth-12, Ceteeth-20, Steareth-20, Ceteareth-20, Ceteeth-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, particularly preferably selected from Ceteeth-20, Steareth-20, Ceteareth-20, Ceteeth-30, Steareth-30 and Ceteareth-30, in a total amount of 0.1 to 10 wt %, preferably of 0.5 to 5.0 wt %, in particular of 1.0 to 4.0 wt %, andat least one ester of a carboxylic acid having 10 to 20 carbon atoms and a linear or branched alcohol having 1 to 5 carbon atoms, preferably isopropyl myristate, in a total amount of 3.0 to 25% by weight, preferably of 5.0 to 20% by weight, in particular of 8.0 to 15% by weight.The oxidant preparations furthermore contain at least one acid. Preferred acids are selected from dipicolinic acid, food acids such as citric acid, acetic acid, malic acid, lactic acid and tartaric acid, dilute mineral acids such as hydrochloric acid, phosphoric acid, pyrophosphoric acid and sulfuric acid, as well as mixtures thereof. The oxidizing agent preparations preferably have a pH in the range from 2 to 5, in particular from 3 to 4.To produce oxidative coloring compositions from the packaging unit (kit-of-parts), the cosmetic agent described above for changing the color of keratin fibers in container C 1 is mixed with the oxidizing agent preparation in container C 2 or vice versa.Furthermore, it can be particularly advantageous if the packaging unit contains at least one further hair treatment agent in an additional container, in particular a conditioning agent preparation. This conditioning agent preparation advantageously contains at least one conditioning agent selected from the group of further cationic polymers, silicone derivatives and oils. In addition, the packaging unit can comprise application aids, such as combs, brushes, applicators or brushes, personal protective apparel, in particular one-way gloves, and optionally instructions for use. An applique is understood to mean a wide brush, at the handle end of which there is a tip which allows and simplifies the separation of fiber bundles or strands from the total amount of fibers.With regard to the cosmetic agent in container C 1 and the oxidizing agent preparation in container C 2, what has been said regarding the cosmetic agents applies mutatismutatically.The present invention further provides a method for coloring keratin fibers with increased conditioning with simultaneously minimized color shift, the method comprising the following method steps: a) providing a cosmetic agent for changing the color of keratin fibers (M1), b) providing an oxidizing agent preparation (M2) containing in a cosmetically compatible carrier at least one oxidizing agent and at least one acid, c) mixing the cosmetic agent (M1) with the oxidizing agent preparation (M2), d) applying the mixture obtained in step c) to the keratin fibers and leaving this mixture for a time of 1 to 60 minutes, preferably of 20 to 45 minutes, at room temperature and / or at at least 30° C. on the keratin fibers, e) rinsing the keratin fibers with water and / or a cleaning composition, and f) optionally applying an after-treatment agent to the keratin fibers and rinsing them out.The cosmetic agent for changing the color of keratin fibers (M1) used is the agent described above with quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate.The method for coloring keratin fibers using a quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate results in improved conditioning, in particular increased volume, of colored keratin fibers, but without the addition of the quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate resulting in an undesirable color shift of ΔE>2 visible to the unsulted human eye.Room temperature is understood to mean the ambient temperature in the context of the present invention. The effect of the coloring and / or lightening preparation can be enhanced by external heat supply, for example by means of a heating hood. The preferred duration of action of the colouring and / or lightening preparation on the keratin fibre is 10 to 60 min, preferably 20 to 45 min. After the end of the period of action, the remaining coloring agent is washed out of the keratin fibers with the aid of a cleaning preparation, which preferably contains at least one cationic and / or anionic and / or nonionic surfactant, and / or water. If necessary, the process is repeated with a further means. After washing out, the keratin fibers are optionally rinsed with a post-treatment agent, for example a conditioning agent, and dried with a towel or a hot air blower. The application of the coloring preparation is usually carried out by the user with his hand. In this case, personal protective clothing is preferably worn, in particular suitable protective gloves, for example made of plastic or latex for single use (disposable gloves) and optionally a skirt. However, it is also possible to apply the coloring agents to the keratin fibers with an application aid.With regard to the cosmetic agent M 1, the oxidizing agent preparation M 2 and further preferred embodiments of the method, what has been said regarding the cosmetic agents and the packaging unit applies mutatismutatively.Finally, the present invention further provides for the use of a cosmetic agent or a packaging unit (kit-of-parts) for increasing the conditioning of keratin fibers while simultaneously minimizing the color shift. The use of a quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate results in an increased conditioning, in particular an increased volume, of colored keratin fibers, without the addition of this hair-conditioning active ingredient leading to an undesired color shift of ΔE>2 visible with the unsulted human eye.With regard to further preferred embodiments of the use, what has been said regarding the cosmetic agents and regarding the packaging unit applies mutatismutatively.The following examples are intended to illustrate preferred embodiments of the invention, but should not be construed as limiting the same.Examples:1. FormulationsCompositions of the cosmetic agents used for changing the colour of keratin fibres (oil-in-water emulsions, all amounts in % by weight). <row><cell>Raw Material< / cell><cell>V1< / cell><cell>E1< / cell><cell>V2< / cell><cell>E2< / cell>< / row><row><cell>Polyacrylic acid< / cell><cell>0,2< / cell><cell>0,2< / cell><cell>0,2< / cell><cell>0,2< / cell>< / row><row><cell>Ammonia (25%)< / cell><cell>6< / cell><cell>6< / cell><cell>6< / cell><cell>6< / cell>< / row><row><cell>2-Octyldodecanol< / cell><cell>2< / cell><cell>2< / cell><cell>2< / cell><cell>2< / cell>< / row><row><cell>C16-C18 fatty alcohol sulfate, Na salt< / cell><cell>0,8< / cell><cell>0,8< / cell><cell>0,8< / cell><cell>0,8< / cell>< / row><row><cell>ethoxylated C12-C14fatty alcohol succinate (2 EO), Na salt< / cell><cell>4,5< / cell><cell>4,5< / cell><cell>4,5< / cell><cell>4,5< / cell>< / row><row><cell>KOH (50%)< / cell><cell>0,2< / cell><cell>0,2< / cell><cell>0,2< / cell><cell>0,2< / cell>< / row><row><cell>Oleic acid< / cell><cell>0,4< / cell><cell>0,4< / cell><cell>0,4< / cell><cell>0,4< / cell>< / row><row><cell>EDTA, tetra-Na salt< / cell><cell>0,2< / cell><cell>0,2< / cell><cell>0,2< / cell><cell>0,2< / cell>< / row><row><cell>Glycerol monostearate< / cell><cell>4< / cell><cell>4< / cell><cell>4< / cell><cell>4< / cell>< / row><row><cell>Cetearyl alcohol< / cell><cell>13< / cell><cell>13< / cell><cell>13< / cell><cell>13< / cell>< / row><row><cell>C12-C14 ethoxylated fatty alcohol (20 EO)< / cell><cell>3< / cell><cell>3< / cell><cell>3< / cell><cell>3< / cell>< / row><row><cell>Monoammonium phosphate< / cell><cell>0,001< / cell><cell>0,001< / cell><cell>0,001< / cell><cell>0,001< / cell>< / row><row><cell>Titanium dioxide< / cell><cell>0,5< / cell><cell>0,5< / cell><cell>0,5< / cell><cell>0,5< / cell>< / row><row><cell>monoethanolamine< / cell><cell>0,3< / cell><cell>0,3< / cell><cell>0,3< / cell><cell>0,3< / cell>< / row><row><cell>Sodium sulfite, anhydrous, anhydrous< / cell><cell>0,2< / cell><cell>0,2< / cell><cell>0,2< / cell><cell>0,2< / cell>< / row><row><cell>Phospholipid< / cell><cell>0,1< / cell><cell>0,1< / cell><cell>0,1< / cell><cell>0,1< / cell>< / row><row><cell>Polyquaternium-39< / cell><cell>1,5< / cell><cell>1,5< / cell><cell>1,5< / cell><cell>1,5< / cell>< / row><row><cell>Vitamin C< / cell><cell>0,1< / cell><cell>0,1< / cell><cell>0,1< / cell><cell>0,1< / cell>< / row><row><cell>2-Amino-2-methylpropanol< / cell><cell>0,1< / cell><cell>0,1< / cell><cell>0,1< / cell><cell>0,1< / cell>< / row><row><cell>Perfume< / cell><cell>0,4< / cell><cell>0,4< / cell><cell>0,4< / cell><cell>0,4< / cell>< / row><row><cell>4-Amino-3-methylphenol< / cell><cell>0,2< / cell><cell>0,2< / cell><cell>-< / cell><cell>-< / cell>< / row><row><cell>m-Aminophenol< / cell><cell>0,6< / cell><cell>0,6< / cell><cell>0,1< / cell><cell>0,1< / cell>< / row><row><cell>p-Amino-o-cresol< / cell><cell>0,3< / cell><cell>0,2< / cell><cell>-< / cell><cell>-< / cell>< / row><row><cell>Resorcinol Resorcinol< / cell><cell>-< / cell><cell>-< / cell><cell>0,2< / cell><cell>0,2< / cell>< / row><row><cell>4-Chlororesorcinol< / cell><cell>-< / cell><cell>-< / cell><cell>0,1< / cell><cell>0,1< / cell>< / row><row><cell>4,5-Diamino-1-(2-hydroxyethyl)pyrazole - H <hi rend="subscript">2< / hi> SO <hi rend="subscript">4< / hi>< / cell><cell>2< / cell><cell>2< / cell><cell>-< / cell><cell>-< / cell>< / row><row><cell>p-Tolylenediamine sulfate< / cell><cell>-< / cell><cell>-< / cell><cell>1< / cell><cell>1< / cell>< / row><row><cell>Copolymer of vinyl pyrrolidone and dimethylaminoethyl methacrylate quaternized with diethyl sulfate< / cell><cell>-< / cell><cell>1< / cell><cell>-< / cell><cell>1< / cell>< / row><row><cell>Water, demineralized< / cell><cell>AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD< / cell><cell>AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD< / cell><cell>AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD< / cell><cell>AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD< / cell>< / row><p xml:id="_c341380318" n="0094">The fat base was melted together at 80° C. and dispersed with a portion of the water quantity. The remaining formulation ingredients were then incorporated in sequence with stirring. The mixture was then made up to 100% by weight with water and the formulation was stirred cold. Oxidizing agent preparation O1 (all amounts in % by weight)<title desc="title">Oxidizing agent preparation O1 (all amounts in % by weight)Raw MaterialO1Disodium pyrophosphate pyrophosphate0,1Dipicolinic acid0,1Potassium hydroxide 50%0,31-Hydroxyethane-1,1-diphosphonic acid 60%0,4C 16-18- Fatty alcohol sulfate0,3PEG-40 Castor Oil1Cetearyl alcohol4Ceteareth-201Bees wax0,3Isopropyl myristate10Hydrogen peroxide 50%11Water is demineralizedAD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD 100 AD2. Color shift by the addition of the quaternized copolymer of vinyl pyrrolidone and dimethylaminoethyl methacrylateTo prepare the oxidative colorants for determining the color shift, the cosmetic agents V1 and E1 were each mixed with the above oxidizing agent preparation O1 in a ratio by weight of 1:1.The oxidative colorants produced in this way were each applied in a defined amount (4 g of oxidative colorant per 1 g of yakpia) to yakpia strands (12 strands per oxidative colorant in each case) and remained on the hair strands at 32° C. for an exposure time of 30 minutes. The remaining agents were then rinsed out of the hair strands for 2 minutes each with low-temperature water, the strands were first dried with a towel and then dried.All strands were measured with a Datacolor colorimeter, Spectraflash 450 type. The values ΔE used for the assessment of color shift are obtained from the L*a*b color measurement values measured on the respective strands as follows: a 0, b 0 and L 0 are in each case the mean values of the color measurement values determined from the 12 measurements of the yakpilar strands dyed out using the standardized carrier. a i, b i and L i are in each case the mean values of the color measurement values which are obtained for dyed out yakpilar strands with addition of the quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate to the standardized carrier.The larger the value for ΔE, the more pronounced is the color difference or "color shift". Color differences with ΔE<1 are not perceptible to the human eye. Color differences with ΔE<2 are visible to the trained eye. Color differences with ΔE>2 are also visible to the unsulted eye. Table 1 shows the ΔE values for the colorations using the cosmetic agent E1. Dyeing with the cosmetic agent E1, which contains the quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate in a total amount of 1.0% by weight, has only a slight color shift of ΔE<1, which is not visible.E1+O1(1:1)0,942. Increased volumeTo prepare the oxidative colorants for determining the conditioning in the form of an increased volume, the cosmetic agents V2 and E2 were each mixed with the above oxidizing agent preparation O1 in a ratio by weight of 1:1.For the dyeings, 6 strands of natural light brown European hair 6 / 0 (Kerling International (Backnang), lot #09 / 2009, B3, length: 22 cm, weight: 2.8 g±0.05 g) were used in each case per oxidative dye. For this purpose, 4 g of the oxidative colorants produced were applied per 1 g of hair strand. After the strands were dyed at 32° C. for 30 min, they were rinsed with water for 2 min and dried in air. The 12 coloured strands and the 6 non-coloured reference strands were stored at 25° C. and 50% relative atmospheric humidity for at least 48 hours.The measurement of the volume (body) was carried out as follows:Before the measurement, each strand was twisted by means of a machine. For this, each strand was fixed at the lower end and then the upper end was rotated 5 times about its own axis. The twisted strands were roasted at 45°C for 45 minutes. The strands were then stored in the twisted state at 23° C. and 50% relative humidity for 16 hours before being dissolved. Subsequently, each strand was carefully combed 5 times with the coarse-tooth side and 5 times with the fine-tooth side of a comb (Hercules Sawmann). Immediately after combing, each strand was fixed in a load cell and the top of the strand was centered in a ring of polished steel having an inner diameter of 10 mm. While the strands were pulled through the ring at a constant speed of 100 mm / min, the force required and the distance travelled were measured.The obtained measurements are compared using the software Stattistica 12.0 (StatBlue Inc., USA).Reference: Reference0,019Stained with V2+O1 (1:1)0,021Coloured with E2+O1 (1:1)0,025The volume of the hair strands is the higher the higher the maximum force applied.Doubling the amount of quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate in cosmetic agent E2 did not bring any further advantage with regard to volume, but did have a negative effect on the feel of the hair.

Claims

Cosmetic agent for changing the colour of keratin fibres, comprising in a cosmetically compatible carrier a) at least one compound selected from the group consisting of oxidation dye precursors, substantive dyes and mixtures thereof, b) a quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate, c) 3.0 to 8.0% by weight, based on the total weight of the cosmetic agent, of partial ester and / or polyol partial ester and d) 10 to 25% by weight, based on the total weight of the cosmetic agent, of 2-octyldodecanol and / or cetearyl alcohol.Cosmetic agent according to Claim 1, characterized in that the copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate is quaternized with dimethyl sulphate and / or diethyl sulphate.Cosmetic agent according to Claim 1 or Claim 2, characterized in that the copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate is quaternized with diethyl sulfate.Cosmetic agent according to one of Claims 1 to 3, characterized in that the amount of quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate is 0.1 to 10% by weight, more preferably 0.25 to 5% by weight and particularly preferably 0.5 to 1.5% by weight, in each case based on the total weight of cosmetic agent.Packaging unit (kit-of-parts), comprising - packaged separately from one another - a) at least one container (C1) comprising a cosmetic agent for changing the colour of keratin fibres according to any of Claims 1 to 4, and b) at least one container (C2) comprising an oxidizing agent preparation which comprises, in a cosmetically compatible carrier, at least one oxidizing agent in a total amount of from 0.5 to 7.0% by weight, preferably from 1.0 to 7.0% by weight, in particular from 3.0 to 7.0% by weight, in each case based on the total weight of the oxidizing agent preparation, and at least one acid.Method for dyeing keratin fibres with increased conditioning, in particular with increased volume of the dyed keratin fibres, with simultaneously minimized colour shift, wherein the method comprises the following method steps: a) providing a cosmetic agent for changing colour of keratin fibres (M1) according to one of Claims 1 to 4, b) providing an oxidizing agent preparation (M2) comprising, in a cosmetically compatible carrier, at least one oxidizing agent in a total amount of from 0.5 to 7.0% by weight, preferably from 1.0 to 7.0% by weight, in particular from 3.0 to 7.0% by weight, in particular based in each case on the total weight of the oxidizing agent preparation, and at least one acid, c) mixing the cosmetic agent (M1) with the oxidizing agent preparation (M2), d) applying the mixture obtained in step c) to the keratin fibers and leaving this mixture for a time of from 1 to 60 minutes, preferably from 20 to 45 minutes, at room temperature and / or at at least 30° C. on the keratin fibers, e) rinsing the keratin fibers with water and / or a cleaning composition, and f) optionally applying a post-treatment agent to the keratin fibers and rinsing them out.Use of a cosmetic agent according to one of Claims 1 to 4 or of a packaging unit (kit-of-parts) according to Claim 5 for increasing the conditioning, in particular for increasing the volume, of keratin fibers while simultaneously minimizing the color shift during the coloring of keratin fibers, in particular human hair.