EP2651378A2

EP2651378A2 - Brightening agent comprising acylpyridinium compounds and defined alkalizing agents

Info

Publication number: EP2651378A2
Application number: EP11788428.8A
Authority: EP
Inventors: Wibke Gross; Ralph Nemitz; Astrid Kroos; Frank Janssen; Astrid Kleen; Hartmut Manneck; Katja Günther
Original assignee: Henkel AG and Co KGaA
Current assignee: Henkel AG and Co KGaA
Priority date: 2010-12-17
Filing date: 2011-11-22
Publication date: 2013-10-23
Also published as: WO2012079920A2; US20130269721A1; DE102010063368A1; US8668745B2; WO2012079920A3

Abstract

The invention relates to an agent for brightening keratin fibers, which contains, in a cosmetically acceptable carrier, (i) at least one acylpyridinium derivative of formula (I), (ii) at least one alkalizing agent, selected from the group including triethanolamine, 2-amino-2-methylpropane-1-ol, 2-amino-2-methylpropane-1,3-diol, lysine, ornithine and/or an alkalizing agent mixture of at least one basic amino acid and at least one alkanolamine, and (iii) at least hydrogen peroxide as the oxidant.

Description

"Brightening agent with acylpyridinium compounds and certain alkalizing agents"

The present invention relates to agents for brightening keratinic fibers, in particular human hair, containing a special bleach activator.

The change of hair color is an important area of modern cosmetics dar. For the purpose of brightening your own hair color or for bleaching market different Blondiermittel with different Blondierleistung are available. The basics of the Blondierverfahren are known in the art and can be found in relevant monographs, eg. B. Kh. Schräder, Basics and Formulations of Cosmetics, 2nd edition, 1989, Dr. med. Alfred Hüthig Verlag, Heidelberg, or W. Limbach (ed.), Cosmetics, 2nd edition, 1995, Georg Thieme Verlag, Stuttgart, New York, be read.

The oxidizing agents contained in Blondiermitteln are able to lighten the hair fiber by the oxidative destruction of the hair dye melanin. For a moderate blonding effect, the use of hydrogen peroxide - preferably using ammonia or other alkalizing agents - as the oxidizing agent alone, for achieving a stronger blonding effect is usually a mixture of hydrogen peroxide and Peroxodisulfatsalzen and / or Peroxomonosulfatsalzen used. However, the whitening is also accompanied by damage to the hair, since not only the natural coloring components of the hair, but also the other structural components of the hair are oxidatively damaged. Depending on the severity of the degree of damage, this ranges from rough, brittle and difficult to comb hair over a reduced resistance and tear resistance of the hair to hair breakage. With larger amounts of hydrogen peroxide and optionally the peroxodisulfates are usually accompanied by greater damage to the keratin. Although bleaching agents hitherto on the market generally show good lightening performance, they can not be considered optimal due to hair damage, long application times and the possible skin irritation due to the high concentrations of oxidizing and alkalizing agents. There is therefore still a need for lightening agents which show good lightening performance without at the same time damaging the hair fiber.

Brightening or bleaching agents typically require a basic pH, especially between pH 8.0 and pH 12. These pH values are necessary to provide an opening to the outer cuticle layer (Cuticle) and to allow a penetration of the active species, in particular hydrogen peroxide, into the hair. However, the basic environment is another cause of damage to the hair and its structure, which also gains in importance with increased application time. The spreading of the outer cuticle layer also leads to an unpleasant surface sensation of the hair and thus to a deteriorated combability in the wet and dry state.

The required basic pH is frequently adjusted with ammonia as the alkalizing agent, since ammonia-containing bleaching agents have additional advantages in terms of lightening performance. For the user, however, such a lightening agent has the disadvantage that it can cause irritation of the eyes or scalp in addition to additional damage to the hair by ammonia, which sensitization or even allergic reactions can be caused. In addition, such hair treatment agents have an intense, unpleasant odor, which can also lead to irritation of the nasal mucosa in the worst case. In addition, the production and storage of ammonia-containing brighteners may be associated with problems in terms of handling and stability.

An enhancement of the whitening effect in the bleaching of hair with the aid of a combination of certain acylpyridinium derivatives and hydrogen peroxide is known from the document WO 2009/135700 A1.

The prior art has not been apparent so far that a combination of certain Acylpyridiniumderivaten, hydrogen peroxide and certain alkalizing not only, as already known, the lightening performance compared to a normal bleaching containing hydrogen peroxide, improved, but also an optimal Aufhellleistung without additional Damage to the hair and in particular without additional irritation of the eyes or scalp has.

The object of the present invention is to provide a composition which brightens the hair not only stronger than when using hydrogen peroxide alone, but in addition also has an optimal brightening performance without additional damage to the hair and in particular without additional irritation of the eyes or scalp. These agents should not be noticed by unpleasant odors and also do not cause irritation of the scalp and nasal mucous membranes.

It is known to the person skilled in the art that with the use of ammonia as the alkalizing agent, as a rule, the best brightening results can be achieved. Dodging on alternative However, alkalizing agent is usually also associated with a reduction in bleaching performance.

It has therefore not been foreseeably for the skilled person that these formulations, comprising a combination of selected alkalizing agents and in particular of special alkalizing mixtures with hydrogen peroxide and certain acylpyridinium compounds, combine the advantage of high skin compatibility with a good bleaching performance and that with these special formulations also Whitening effect can be achieved, which shows no loss compared to the use of ammonia.

The combination of selected alkalizing agents and in particular of special alkalizing agent mixtures with hydrogen peroxide and certain acylpyridinium compounds makes it possible to produce low-odor formulations which are well tolerated by the skin and possess more advantageous properties than the hitherto known prior art with regard to irritation of the scalp and nasal mucous membranes.

A first subject of the invention is therefore a means for lightening keratinic fibers, characterized in that it is in a cosmetic carrier

(i) at least one acylpyridinium derivative of the formula (I) (I), in which

R _{1 is} a C ₁ -C ₆ -alkyl group, a C ₂ -C ₆ -alkenyl group, a C ₂ -C ₆ -hydroxyalkyl group, a C ₁ -C ₆ -alkoxy-C ₂ -C ₆ -alkyl group, a carboxy-C ₂ - C ₆ alkyl group, an arylCrCValkylgruppe, a heteroaryl-CVCe-alkyl group, an aryl group or a heteroaryl group,

R 2, R 3 and R 4 each independently represent hydrogen, a C 1 -C 6 alkyl group

Halogen atom or a CVCe-acyl group, with the proviso that at least one of the radicals R 2, R 3 and R 4 is a C 1 -C 4 -cyclo group,

X ^"represents a physiologically acceptable anion,

(Ii) at least one alkalizing agent selected from triethanolamine, 2-amino-2-methylpropan-1-ol, 2-amino-2-methylpropane-1, 3-diol, lysine, ornithine and / or a Alkalisierungsmittelgemisch of at least one basic amino acid and at least one alkanolamine,

and

(Iii) contains at least hydrogen peroxide as the oxidizing agent. Under keratinic fibers or keratin fibers are furs, wool, feathers and especially human hair to understand. Although the compositions according to the invention are primarily suitable for whitening keratin fibers, in principle there is nothing to prevent their use in other fields as well.

The agents according to the invention containing the active ingredients in a cosmetic carrier. The cosmetic carrier is preferably aqueous, alcoholic or aqueous-alcoholic. For the purpose of hair bleaching such carriers are for example creams, emulsions, gels or surfactant-containing foaming solutions, such as shampoos, foam aerosols or other preparations which are suitable for use on the hair. For the purposes of the invention, an aqueous carrier contains at least 40% by weight, in particular at least 50% by weight, of water. For the purposes of the present invention, aqueous-alcoholic carriers are to be understood as meaning water-containing compositions containing from 3 to 70% by weight of a C 1 -C 4 alcohol, in particular ethanol or isopropanol. The compositions of the invention may additionally contain other organic solvents such as methoxybutanol, ethyl diglycol, 1, 2-propylene glycol, n-propanol, n-butanol, n-butylene glycol, glycerol, diethylene glycol monoethyl ether, and diethylene glycol mono-n-butyl ether. Preference is given to all water-soluble organic solvents.

As the first essential ingredient, the agents according to the invention contain at least one acylpyridinium derivative according to formula (I). Examples of those mentioned as substituents of the compounds of the formula (I) are mentioned below by way of non-limiting example. Examples of C 6 -C 6 -alkyl radicals are the groups -CH ₃ , -CH ₂ CH ₃ , -CH ₂ CH ₂ CH ₃ , -CH ( CH ₃ ) ₂ , -CH ₂ CH ₂ CH ₂ CH ₃ , -CH ₂ CH (CH ₃ ) ₂ , - CH (CH ₃ ) CH ₂ CH ₃ , -C (CH ₃ ) ₃ . Examples of a C ₂ -C ₆ -alkenyl group are a prop-2-enyl group (allyl group), a 2-methyl-prop-2-enyl group, a but-3-enyl group, a but-2-enyl group, a pentoxy group. 4-enyl group or a pent-3-enyl group, wherein the prop-2-enyl group is preferred. Examples of a C ₂ -C ₆ -hydroxyalkyl group are -CH ₂ CH ₂ OH, -CH ₂ CH ₂ CH ₂ OH, -CH ₂ CH (OH) CH ₃ and -CH ₂ CH ₂ CH ₂ CH ₂ OH, where the Group -CH ₂ CH ₂ OH is preferred. Examples of C 6 -C 12 alkoxy-C 1 -C 6 -alkyl groups are the groups -CH ₂ CH ₂ OCH ₃ , -CH ₂ CH ₂ CH ₂ OCH ₃ , -CH ₂ CH ₂ OCH ₂ CH ₃ , - CH ₂ CH ₂ CH ₂ OCH ₂ CH ₃ , -CH ₂ CH ₂ OCH (CH ₃ ) ₂ , -CH ₂ CH ₂ CH ₂ OCH (CH ₃ ) ₂ . Examples of a carboxy-C C ₆ alkyl group are the carboxymethyl group, the 2-carboxyethyl group or the 3-carboxypropyl group. Examples of aryl-C Ce-alkyl groups are the benzyl group and the 2-phenylethyl group. Examples of a heteroaryl-C 1 -C 4 -alkyl group are the pyridin-2-ylmethyl group, the pyridin-3-ylmethyl group, the pyridin-4-ylmethyl group, the pyrimidin-2-ylmethyl group, the pyrrol-1-ylmethyl group, the pyrrole-1 ylethyl group, the pyrazol-1-ylmethyl group or the pyrazol-1-yl-ethyl group. Examples of an aryl group are the phenyl group, the 1-naphthyl group or the 2- Naphthyl. Examples of a heteroaryl group are the pyridin-2-yl group, the pyridin-3-yl group, the pyridin-4-yl group, the pyrimidin-2-yl group, the pyrrol-1-yl group, the pyrrol-2-yl group, the pyrazole group. 1-yl group, the pyrazol-3-yl group or the pyrazol-4-yl group. Examples of a C 1 -C ₆ acyl group are acetyl (1-oxo-ethyl), 1-oxo-propyl, 1-oxo-butyl, 1-oxo-pentyl, 1-oxo-2,2-dimethylpropyl and 1-oxo hexyl.

In one embodiment of the present invention, preference is given to those compounds of the formula (I) in which the radical R 1 has the general structure (I) for a C ₁ -C ₄ -alkyl group, for a C ₂ -C ₆ -alkenyl group or for a C ₂ -C ₆ -hydroxyalkyl group. It is preferred according to the invention if the radical R 1 is a C 1 -C 4 -alkyl group, preferably methyl, ethyl, n-propyl or isopropyl and particularly preferably methyl.

It has been found that the acylpyridinium derivatives according to formula (I) according to the invention have particularly advantageous properties when they carry the acyl group either in the 2- or 4-position on the pyridine ring. Preferred compounds of the formula (I) are furthermore those compounds in which either the radical R 2 or the radical R 4 is a C -C acyl group, preferably an acetyl group. It is further preferred if one of the radicals R 2 or R 4 is an acetyl group, while the other of these radicals and the radical R 3 are each hydrogen. A further embodiment of the present invention is therefore characterized in that the agent contains as acylpyridinium derivative according to formula (I) at least one 2-acetylpyridinium derivative and / or 4-acetylpyridinium derivative. Suitable acetylpyridinium derivatives are in particular the physiologically tolerable salts which contain as cation an acetylpyridinium derivative selected from 4-acetyl-1-methylpyridinium, 4-acetyl-1-allylpyridinium, 4-acetyl-1- (2-hydroxyethyl) pyridinium, 2-acetyl 1-methylpyridinium, 2-acetyl-1-allylpyridinium and 2-acetyl-1- (2-hydroxyethyl) pyridinium.

It is preferred if the anion X ^" according to formula (I) is selected from halide, in particular chloride, bromide and iodide, benzenesulfonate, p-toluenesulfonate, CC ^ alkylsulfonate, trifluoromethanesulfonate, acetate, trifluoroacetate, perchlorate,% sulfate, hydrogensulfate According to the invention it is advantageous if the physiologically acceptable anion X ^"is a halide ion (in particular chloride or bromide), hydrogen sulfate, p-toluenesulfonate, benzenesulfonate or acetate.

In particular, those agents are preferred according to the invention, which are characterized in that the Acylpyridiniumderivat according to formula (I) is selected from at least one compound of the group which is formed from 4-acetyl-1-methylpyridinium p-toluenesulfonate, 4-acetyl-1 -methyl- pyridinium benzenesulfonate, 4-acetyl-1-methylpyridinium hydrogensulfate, 4-acetyl-1-methylpyridinium acetate, 4-acetyl-1-allylpyridinium p-toluenesulfonate, 4-acetyl-1-allylpyridinium benzenesulfonate, 4-acetyl-1 - allylpyridinium hydrogensulfate, 4-acetyl-1-allylpyridinium acetate, 2-acetyl-1-methylpyridinium p-toluenesulfonate, 2-acetyl-1-methylpyridinium benzenesulfonate, 2-acetyl-1-methylpyridinium hydrogensulfate, 2-acetyl-1-methylpyridinium acetate, 2- Acetyl-1-allylpyridinium p-toluenesulfonate, 2-acetyl-1-allylpyridinium-benzenesulfonate, 2-acetyl-1-allylpyridinium hydrogensulfate and 2-acetyl-1-allylpyridinium acetate. Particularly preferred agents according to the invention are characterized in that they contain, as the acylpyridinium derivative according to formula (I), a compound selected from 4-acetyl-1-methylpyridinium p-toluenesulfonate and / or 2-acetyl-1-methylpyridinium p-toluenesulfonate, especially 4-acetyl-1-methylpyridinium p-toluenesulfonate.

An embodiment of the present invention is characterized in that in the composition according to the invention the acylpyridinium derivatives of the formula (I) in a weight fraction of 0.1 to 10 wt .-%, in particular from 0.2 to 4 wt .-%, and in particular 0 , 5 to 2 wt .-%, each based on the total weight of the composition are included.

As a further essential ingredient, the compositions according to the invention further contain at least one alkalizing agent selected from triethanolamine, 2-amino-2-methylpropan-1-ol, 2-amino-2-methylpropane-1, 3-diol, lysine, ornithine and / or a Alkalizing agent mixture of at least one basic amino acid and at least one alkanolamine.

An amino acid in the context of the invention is an organic compound which contains in its structure at least one protonatable amino group and at least one -COOH or -SO ₃ H group. Preferred amino acids are aminocarboxylic acids, in particular a- (alpha) -aminocarboxylic acids and .omega.-aminocarboxylic acids, α-aminocarboxylic acids being particularly preferred.

Basic amino acids according to the invention are to be understood as meaning those amino acids which have an isoelectric point p1 of greater than 7.0.

Basic α-aminocarboxylic acids contain at least one asymmetric carbon atom. In the context of the present invention, both possible enantiomers can be used equally as a specific compound or else mixtures thereof, in particular as racemates. However, it is particularly advantageous to use the naturally preferred isomeric form, usually in L-Konfigu ratio n. The basic amino acids are preferably selected from the group consisting of arginine, lysine, ornithine and histidine, more preferably arginine and lysine.

The alkanolamines which can be used in the alkalizing agent mixture according to the invention are preferably selected from primary amines having a C ₂ -C ₆ -alkyl basic body which carries at least one hydroxyl group. Preferred alkanolamines are selected from the group consisting of 2-aminoethane-1-ol (monoethanolamine), 3-aminopropan-1-ol, 4-aminobutan-1-ol, 5-aminopentane-1-ol, 1-aminopropane -2-ol, 1-aminobutan-2-ol, 1-aminopentan-2-ol, 1-aminopentan-3-ol, 1-aminopentan-4-ol, 3-amino-2-methylpropan-1-ol, 1 -Amino-2-methylpropan-2-ol, 3-aminopropane-1, 2-diol, 2-amino-2-methylpropane-1,3-diol. Alkanolamines which are particularly preferred according to the invention are selected from the group consisting of 2-aminoethan-1-ol and 2-amino-2-methylpropan-1-ol.

Preferred agents according to the invention contain an alkalizing agent mixture.

A further embodiment of the first subject of the invention is an agent which is characterized in that the agent as alkalizing agent at least one alkalizing agent mixture of at least one basic amino acid selected from arginine, histidine, lysine and ornithine, and at least one alkanolamine selected from ethanolamine, triethanolamine, 2-amino-2-methylpropan-1-ol and 2-amino-2-methylpropane-1,3-diol

A preferred embodiment of the first subject of the invention is an agent, which is characterized in that the agent as alkalizing agent at least one alkalizing agent mixture selected from the combination of arginine and ethanolamine, the combination of arginine and 2-amino-2-methylpropan-1-ol, the combination of lysine and 2-amino-2-methylpropan-1-ol, and / or the combination of lysine and ethanolamine.

In addition, the agent may contain further alkalizing agents, in particular inorganic alkalizing agents. Inorganic alkalizing agents usable in the present invention are preferably selected from the group consisting of sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, sodium phosphate, potassium phosphate, sodium silicate, sodium metasilicate, potassium silicate, sodium carbonate and potassium carbonate.

As a third essential ingredient, the agent according to the invention contains at least hydrogen peroxide as the oxidizing agent. Preferably, hydrogen peroxide itself is used as the aqueous solution. Hydrogen peroxide may also be in the form of a solid addition compound of hydrogen peroxide to inorganic or organic compounds, such as sodium percarbamide, Polyvinylpyrrolidinon n H ₂ 0 ₂ (n is a positive integer greater than 0), urea peroxide and melamine peroxide used.

Hydrogen peroxide is preferably 0.1 to 25 wt .-%, particularly preferably 1 to 20 wt .-% and particularly preferably 4.5 to 9 wt .-%, each calculated to 100% hydrogen peroxide and based on the ready-to-use agent on the total weight of the ready-to-use agent.

Considering the above-mentioned preferred embodiments, it represents a very specific and expressly preferred embodiment, when the means for lightening keratinic fibers in a cosmetic carrier as the first component at least one compound selected from the group consisting of 4-acetyl 1-methylpyridinium p-toluenesulfonate, 4-acetyl-1-methylpyridinium-benzenesulfonate, 4-acetyl-1-methylpyridinium hydrogensulfate, 4-acetyl-1-methylpyridinium acetate, 4-acetyl-1-allylpyridinium p-toluenesulfonate, 4- Acetyl-1-allylpyridinium benzenesulfonate, 4-acetyl-1-allylpyridinium hydrogensulfate, 4-acetyl-1-allylpyridinium acetate, 2-acetyl-1-methylpyridinium p-toluenesulfonate, 2-acetyl-1-methylpyridinium-benzenesulfonate, 2-acetyl- 1-methylpyridinium hydrogensulfate, 2-acetyl-1-methylpyridinium acetate, 2-acetyl-1-allylpyridinium p-toluenesulfonate, 2-acetyl-1-allylpyridinium benzenesulfonate, 2-acetyl-1-allylpyridinium hydrogensulfate and 2-acetyl-1 allyl pyridinium acetate containing

as second component at least one alkalizing agent mixture of at least one basic amino acid selected from arginine, histidine, lysine and ornithine, and at least one alkanolamine selected from ethanolamine, triethanolamine, 2-amino-2-methylpropan-1-ol and 2-amino-2 methylpropane-1,3-diol,

and as the third component contains hydrogen peroxide.

Combinations of the essential formulation constituents, in each case based on the ready-to-use agent, in the following combinations (a) to (m) have proven to be preferred for achieving the object of the invention:

Combination (a):

3.0 to 6.0% by weight of hydrogen peroxide, 0.5 to 4.0% by weight of 4-acetyl-1-methylpyridinium p-toluenesulfonate and 0.5 to 15.0% of triethanolamine.

Combination (b):

3.0 to 6.0% by weight of hydrogen peroxide, 0.5 to 4.0% by weight of 4-acetyl-1-methylpyridinium p-toluenesulfonate and 0.5% by weight to 15.0% of 2 amino-2-methylpropan-1-ol. Combination (c):

3.0 to 6.0% by weight of hydrogen peroxide, 0.5 to 4.0% by weight of 4-acetyl-1-methylpyridinium p-toluenesulfonate and 0.5% by weight to 15.0% of 2 Amino-2-methylpropane-1,3-diol.

Combination (d):

From 3.0 to 6.0% by weight of hydrogen peroxide, from 0.5 to 4.0% by weight of 4-acetyl-1-methylpyridinium p-toluenesulfonate and from 0.5% by weight to 5.0% by weight of lysine.

Combination (s):

From 3.0 to 6.0% by weight of hydrogen peroxide, from 0.5 to 4.0% by weight of 4-acetyl-1-methylpyridinium p-toluenesulfonate and from 0.5% by weight to 5.0% by weight of ornithine.

Combination (f):

3.0 to 6.0% by weight of hydrogen peroxide, 0.5 to 4.0% by weight of 4-acetyl-1-methylpyridinium p-toluenesulfonate, 0.5% by weight to 5.0% of Arginine and 0.5% to 5.0% L-lysine.

Combination (g):

3.0 to 6.0% by weight of hydrogen peroxide, 0.5 to 4.0% by weight of 4-acetyl-1-methylpyridinium p-toluenesulfonate, 0.5% by weight to 5.0% of Arginine, 0.5% to 5.0% L-lysine and 0.5% to 5.0% L-ornithine.

Combination (h):

3.0 to 6.0 wt .-% hydrogen peroxide, 0.5 to 4.0 wt .-% 4-acetyl-1-methylpyridinium p-toluenesulfonate, 0.5 wt .-% to 15.0% monoethanolamine and 0.5% to 5.0% L-arginine.

Combination (i):

3.0 to 6.0 wt .-% hydrogen peroxide, 0.5 to 4.0 wt .-% 4-acetyl-1-methylpyridinium p-toluenesulfonate, 0.5 wt .-% to 15,0% monoethanolamine and 0.5% to 5.0% L-lysine.

Combination (j):

3.0 to 6.0 wt .-% hydrogen peroxide, 0.5 to 4.0 wt .-% 4-acetyl-1-methylpyridinium p-toluenesulfonate, 0.5 wt .-% to 15,0% monoethanolamine and 0.5% to 5.0% L-ornithine.

Combination (k): 3.0 to 6.0% by weight of hydrogen peroxide, 0.5 to 4.0% by weight of 4-acetyl-1-methylpyridinium p-toluenesulfonate, 0.5% by weight to 15.0% of 2 Amino-2-methylpropan-1-ol and 0.5% to 5.0% L-arginine.

Combination (I):

3.0 to 6.0% by weight of hydrogen peroxide, 0.5 to 4.0% by weight of 4-acetyl-1-methylpyridinium p-toluenesulfonate, 0.5% by weight to 15.0% of 2 Amino-2-methylpropan-1-ol and 0.5% to 5.0% L-lysine.

Combination (m):

3.0 to 6.0% by weight of hydrogen peroxide, 0.5 to 4.0% by weight of 4-acetyl-1-methylpyridinium p-toluenesulfonate, 0.5% by weight to 15.0% of 2 Amino-2-methylpropan-1-ol and 0.5% to 5.0% L-orn ithin.

The best results could be achieved with formulations containing as alkalizing agent both at least one alkanolamine, in particular monoethanolamine or 2-amino-2-methylpropan-1-ol, and at least one basic amino acid selected from the group arginine, lysine and / or ornithine , contain. Explicitly particularly preferred are therefore the combinations which include both an alkanolamine and a basic amino acid in the following concentration ranges. Particularly preferred agents therefore contain as essential constituents one of the combinations (h) to (m).

Bleaching processes on keratin fibers usually take place in an alkaline medium. However, in order to protect the keratin fibers as well as the skin as much as possible, it is not desirable to set too high a pH. For the purposes of the present invention, the pH values are pH values which were measured at a temperature of 22 ° C.

To adjust the pH, commonly used acidifying agents are known to the person skilled in the art. Acidifying agents which are preferred according to the invention are indulgent acids, such as lactic acid, citric acid, acetic acid, malic acid or tartaric acid, dilute mineral acids and their acid-reacting salts in water and organic phosphonic or sulfonic acids.

However, to improve lightening performance, the ready-to-use bleaching agents preferably have an alkaline pH. Therefore, it is preferred to adjust an agent of the first subject of the invention to an alkaline pH between 6 and 12, especially between 9 and 11, immediately prior to application to the keratinic fibers. An embodiment of the first subject of the invention is therefore an agent which is characterized in that it has a pH of 7.5 to 12, preferably 8.5 to 1 1, 5, and particularly preferably 9 to 11.

Furthermore, it has proven to be advantageous if the agents contain at least one stabilizer or complexing agent. Particularly preferred stabilizers are phenacetin, alkali benzoates (sodium benzoate) and salicylic acid.

Also preferred according to the invention is the use of so-called complexing agents. Complex images are substances that can complex metal ions. Preferred complexing agents are so-called chelate complexing agents, ie substances which form cyclic compounds with metal ions, a single ligand occupying more than one coordination site on a central atom, i. H. at least "bidentate". Customary and preferred chelating agents in the context of the present invention are, for example, polyoxycarboxylic acids, polyamines, ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA) and hydroxyethanediphosphonic acids or their alkali metal salts. Complex-forming polymers, ie polymers which carry functional groups either in the main chain themselves or in the side thereof, which can act as ligands and as a rule react with suitable metal atoms to form chelate complexes, can be used according to the invention. The polymer-bound ligands of the resulting metal complexes can originate from only one macromolecule or belong to different polymer chains. Preferred complexing agents according to the invention are nitrogen-containing polycarboxylic acids, in particular EDTA, and phosphonates, preferably hydroxyalkane or aminoalkane phosphonates and in particular 1-hydroxyethane-1, 1-diphosphonate (HEDP) or its di- or tetrasodium salt and / or ethylenediamine tetramethylenephosphonate (EDTMP) or its Hexane atriumsalz and / or Diethylentriaminpentamethylenphosphonat (DTPMP) or its hepta- or Octosatriumsalz.

According to the invention, the agent can be applied to the hair together with a catalyst, which additionally activates the oxidation of the dye precursors. Such catalysts are z. For example, certain enzymes, iodides, quinones or metal ions. Suitable enzymes for this purpose are, for. For example, peroxidases that can significantly increase the effect of small amounts of hydrogen peroxide. Use of certain metal ions or complexes may also be preferred. Particularly suitable are Zn ²⁺ , Cu ²⁺ and Mn ²⁺ .

In order to avoid instabilities due to undesirable reactions between the individual ingredients during storage of the agents, it is expedient to bring the ingredients into contact with each other only immediately before use. It is useful, the ingredients to be made separately from each other. On the other hand, it may be useful for stability reasons to store certain ingredients at a neutral or slightly acidic pH and only at the time of application to suspend an alkaline environment. These ingredients include hydrogen peroxide.

It is particularly advantageous to store alkalizing agent and hydrogen peroxide separately. The acylpyridinium derivative of the formula (I) can be formulated both together with hydrogen peroxide and also together with the alkalizing agent according to the invention. However, it has been found to be advantageous according to the invention when the acylpyridinium derivative of the formula (I) is formulated together with hydrogen peroxide.

The ready-to-use agent according to the invention is prepared before use by mixing an alkalization preparation M2 and an oxidation preparation M1. It is therefore advantageous to offer the user both preparations in a set. Therefore, a preferred dosage form of the ready-to-use agent is a separate packaging unit wherein the means M1 and M2 are each packaged separately.

It may therefore be preferred if the agent M1 containing hydrogen peroxide has a weakly acidic pH. A further embodiment of the present invention is therefore characterized in that the agent M1 has a pH of from pH 2 to pH 6, preferably from pH 2.5 to pH 4.5.

Another object of the present invention is therefore a multi-component packaging unit (kit-of-parts), which comprises at least two separately manufactured containers, wherein

a first container C1 at least one agent M1, containing in a cosmetically acceptable

Carrier as oxidation agent at least hydrogen peroxide, and

a second container C2 at least one agent M2, containing in a cosmetically acceptable carrier at least one alkalizing agent selected from triethanolamine, 2-amino-2-methylpropan-1-ol, 2-amino-2-methylpropane-1, 3-diol, lysine , Ornithine and / or an alkalizing agent mixture of at least one basic amino acid and at least one alkanolamine,

which is characterized in that at least one of the agents M1 and / or M2 contains an acylpyridinium derivative of the formula (I) according to claim 1. In a preferred embodiment, at least the agent M1 contains an acylpyridinium derivative of the formula (I).

For the purposes of the present invention, container is understood to mean an envelope which is present in the form of an optionally reclosable bottle, a tube, a can, a sachet, a sachet or similar wrappings. The wrapping material according to the invention are no limits. However, these are preferably casings made of glass or plastic.

Furthermore, it may be particularly advantageous according to the invention if said kit-of-parts contains at least one further hair treatment agent in a separate container, in particular a conditioner preparation or a bleaching powder with peroxodisulfates. In addition, the packaging unit application aids, such as combs, brushes or brushes, personal protective clothing, especially disposable gloves, and optionally include instructions for use.

Ready-to-use agents according to the invention are preferably aqueous, flowable preparations. The compositions according to the invention may furthermore contain all active substances, additives and auxiliaries known for such preparations. The ready-to-use agents as a mixture of agents M1 and M2 may contain surface-active substances selected from anionic as well as nonionic, zwitterionic, amphoteric and cationic surfactants.

Anionic surfactants are characterized by a water-solubilizing anionic group such as a carboxylate, sulfate, sulfonate or phosphate group and a lipophilic alkyl group of about 8 to 30 carbon atoms. In addition, glycol or polyglycol ether groups, ester, ether and amide groups and hydroxyl groups may be present in the molecule. Examples of such anionic surfactants are, in each case in the form of the sodium, potassium and ammonium as well as the mono-, di- and trialkanolammonium salts having 2 to 4 C atoms in the alkanol group, linear and branched fatty acids having 8 to 30 C atoms. Atoms (soaps); Ethercarbonsäuren, in particular the formula RO (CH ₂ CH ₂ 0) _x CH ₂ COOH, in which R is a linear alkyl group having 8 to 30 carbon atoms and x = 0 or 1 to 16; sarcosides; acyltaurides; isethionates; Sulfosuccinic acid mono and dialkyl esters and sulfosuccinic acid monoalkyl polyoxyethyl esters; linear alkanesulfonates; linear α-olefin sulfonates; Sulfonates of unsaturated fatty acids; α-sulfofatty acid methyl ester of fatty acids; Alkyl sulfates and alkyl ether sulfates, in particular of the formula RO (CH ₂ CH ₂ O) _x SO ₃ H, in which R is a linear alkyl group having 8 to 30 carbon atoms and x is 0 or a number from 1 to 12; Mixtures of surface active hydroxysulfonates; sulfated hydroxyalkylpolyethylene and / or hydroxyalkylene-propylene glycol ethers; Esters of tartaric acid and citric acid with alcohols; Alkyl and / or alkenyl ether phosphates of the formula RO (C ₂ H ₄ O) _x P (= O) (OH) (OR '), wherein R is an aliphatic, optionally unsaturated hydrocarbon radical having 8 to 30 carbon atoms, R' is hydrogen, a radical (CH ₂ CH ₂ 0 ) _y R and x and y independently represent a number from 1 to 10; sulfated fatty acid alkylene glycol esters of the formula RC (0) 0 (alkO) _n SO ₃ H in which R is a linear or branched, aliphatic, saturated and / or unsaturated alkyl radical having 6 to 22 C atoms, alk is CH ₂ CH ₂ , CHCH ₃ CH ₂ and / or CH ₂ CHCH ₃ and n is a number from 0.5 to 5; and monoglyceride sulfates and monoglyceride ether sulfates.

Zwitterionic surfactants are surface-active compounds which carry at least one quaternary ammonium group and at least one carboxylate, sulfonate or sulfate group in the molecule. Examples of such zwitterionic surfactants are the betaines such as the N-alkyl-N, N-dimethylammonium glycinates, N-acyl-aminopropyl-N, N-dimethylammoniumglycinate, and 2-alkyl-3-carboxymethyl-3-hydroxyethyl-imidazolines each having 8 to 18 carbon atoms in the alkyl or acyl group and Kokosacylaminoethylhydroxyethylcarboxymethylglycinat. A preferred zwitterionic surfactant is the fatty acid amide derivative known by the INCI name Cocamidopropyl Betaine.

Amphoteric surfactants are understood as meaning those surface-active compounds which, apart from a C ₈ -C ₂₄ -alkyl or -acyl group in the molecule, contain at least one free amino group and at least one -COOH or -SO ₃ H group and are capable of forming internal salts , Typical 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 having about 8 to 24 C Atoms in the alkyl group. Exemplary amphoteric surfactants are N-cocoalkylaminopropionate, cocoacylaminoethylaminopropionate and C ₁₂ -C ₁₈ acylsarcosine.

Nonionic surfactants and emulsifiers contain as hydrophilic group z. A polyol group, a polyalkylene glycol ether group or a combination of polyol and polyglycol ether groups. Examples of such compounds are addition products of from 1 to 50 mol of ethylene oxide and / or from 0 to 5 mol of propylene oxide onto linear and branched fatty alcohols containing from 8 to 30 carbon atoms, to fatty acids containing from 8 to 30 carbon atoms and to alkylphenols having from 8 to 15 carbon atoms. Atoms in the alkyl group; with a methyl or C ₂ -C ₆ alkyl radical end-capped addition products of 1 to 50 moles of ethylene oxide and / or 0 to 5 moles of propylene oxide to linear and branched fatty alcohols having 8 to 30 carbon atoms, to fatty acids having 8 to 30 carbon atoms and at Alkylphenols having 8 to 15 C atoms in the alkyl group; Polyglycerol esters and alkoxylated polyglycerol esters; polyol; higher alkoxylated, propoxylated and in particular ethoxylated, mono-, di- and triglycerides with a degree of alkoxylation greater than 5, such as glycerol monolaurate + 20 ethylene oxide and glycerol monostearate + 20 ethylene oxide; Amine oxides; hydroxy mixed; Sorbitan fatty acid esters and adducts of ethylene oxide with sorbitan fatty acid esters such as the polysorbates and sorbitan monolaurate + 20 moles of 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-alkyl; Alkylphenols and Alkylphenolalkoxylate having 6 to 21, in particular 6 to 15 carbon atoms in the alkyl chain and 5 to 30 ethylene oxide and / or propylene oxide units; Alkylpolyglycosides corresponding to the general formula RO- (Z) _x , where R is alkyl, Z is sugar and x is the number of sugar units.

The nonionic emulsifiers in the context of the invention furthermore include the polymerization products of ethylene oxide and propylene oxide onto saturated or unsaturated fatty alcohols; Fatty acid esters of polyhydric alcohols with saturated or unsaturated fatty acids; Alkyl esters of saturated or unsaturated fatty acids or alkylphenols and their alkoxylates; in particular ethylene glycol ethers of fatty alcohols; mixed ethylene and propylene glycol ethers with fatty alcohols; Fatty acid esters of sorbitan and polyethylene glycol; Esters of non-hydroxylated C ₆ -C ₃₀ -alkyl monocarboxylic acids with polyethylene glycol; and addition products of alkylphenols to ethylene and / or propylene oxide.

Cationic surfactants of the quaternary ammonium compound type, the esterquats and the amidoamines are preferred according to the invention in ready-to-use agents. Preferred quaternary ammonium compounds are ammonium halides, in particular chlorides and bromides, such as alkyltrimethylammonium chlorides, dialkyldimethylammonium chlorides and trialkylmethylammonium chlorides, and the imidazolium compounds known under the INCI names Quaternium-27 and Quaternium-83. Further cationic surfactants which can be used according to the invention are the quaternized protein hydrolyzates. Alkylamidoamines are usually prepared by amidation of natural or synthetic fatty acids and fatty acid cuts with dialkylaminoamines, such as stearamidopropyl-dimethylamine. Likewise 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, as well as Dehyquart F-75, Dehyquart C-4046, Dehyquart L80 and Dehyquart AU-35 are examples of such esterquats. The cationic surfactants are contained in the compositions according to the invention preferably 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, anionic, nonionic, zwitterionic and / or amphoteric surfactants and mixtures thereof may be preferred.

The agents according to the invention, as well as your agents M1 and / or M2, may contain further active ingredients, auxiliaries and additives. Other active substances, auxiliaries and additives which can be used according to the invention are, for example, anionic polymers (such as carbomers, copolymers and crosspolymers of acrylic acid, methacrylic acid, maleic acid, itaconic acid and optionally further nonionic monomers); cationic polymers (such as Polyquaternium-4, Polyquaternium-10, Polyquaternium-24, Polyquaternium-67, Polyquaternium-72, Polyquaternium-75, Polyquaternium-29, Polyquaternium-6, Polyquaternium-7, Polyquaternium-22); nonionic polymers (such as vinyl pyrrolidinone / vinyl acrylate copolymers, polyvinyl pyrrolidinone and vinyl pyrrolidinone vinyl acetate copolymers and polysiloxanes); zwitterionic and amphoteric polymers (such as acrylamidopropyltrimethylammonium chloride / acrylate copolymers and octylacrylamide / methyl methacrylate / tert-butylaminoethyl methacrylate / 2-hydroxypropyl methacrylate copolymers); Thickening agents (such as agar-agar, guar gum, alginates, xanthan gum, gum arabic, karaya gum, locust bean gum, linseed gums, dextrans, cellulose derivatives, e.g., methyl cellulose, hydroxyalkyl cellulose and carboxymethyl cellulose, starch fractions and derivatives such as Amylose, amylopectin and dextrins, clays such as bentonite or fully synthetic hydrocolloids such as polyvinyl alcohol); Structural amides (such as sugar, maleic acid and lactic acid) and bodying agents (such as sugar esters, polyol esters or polyol alkyl ethers); Protein hydrolysates (in particular elastin, collagen, keratin, milk protein, soy protein and wheat protein hydrolysates, their condensation products with fatty acids); Perfume oils; Care oils; cyclodextrins; Defoamers such as silicones; Dyes and pigments for staining the agent; Anti-dandruff agents (such as Piroctone Olamine, Zinc Omadine and Climbazole); Sunscreens (especially derivatized benzophenones, cinnamic acid derivatives and triazines); Active ingredients (such as allantoin, pyrrolidonecarboxylic acids, cholesterol and their salts); other fats and waxes (such as fatty alcohols, beeswax, montan wax and paraffins); Swelling and penetration substances (such as glycerol, propylene glycol monoethyl ether, carbonates, bicarbonates, guanidines, ureas and primary, secondary and tertiary phosphates); Opacifiers (such as latex, styrene / PVP and styrene / acrylamide copolymers); Pearlescing agents (such as ethylene glycol mono- and distearate and PEG-3-distearate); Propellants (such as propane-butane mixtures, N ₂ 0, dimethyl ether, C0 ₂ and air) and antioxidants.

The choice of these other substances will be made by those skilled in the art according to the desired properties of the agents. 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, eg. B. Kh. Schräder, bases and formulations of cosmetics, 2nd edition, Hüthig book Verlag, Heidelberg, 1989, referenced. The compositions according to the invention can be provided not only as pure lightening agents, ie as so-called bleaching agents, but also as matting lightening agents which, at the same time as lightening, also cause a matting of the keratin fibers, so that the color shifts which frequently occur during bleaching operations, but undesired color shifts into reddish or orange Areas is compensated by a slight coloration, especially in cool shades.

For such matting, dyeing components are so-called substantive dyes ("direct drawers"), which are dye molecules which are applied directly to the substrate and do not require an oxidative process to form the ink.

In one embodiment of the present invention, the ready-to-use agents according to the invention may contain at least one substantive dye. These are dyes that raise directly on the hair and do not require an oxidative process to form the color. Direct dyes are usually nitrophenylenediamines, nitroaminophenols, azo dyes, anthraquinones or indophenols. The substantive dyes are each preferably used in an amount of 0.0001 to 5.0 wt .-%, preferably from 0.001 to 1, 5 wt .-%, each based on the total application preparation. The total amount of substantive dyes is preferably at most 1, 0 wt .-%.

Preferred anionic substantive dyes are those under the international designations or trade 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, bromophenol blue and tetrabromophenol blue known compounds. Preferred cationic substantive dyes are cationic triphenylmethane dyes such as Basic Blue 7, Basic Blue 26, Basic Violet 2 and Basic Violet 14, aromatic systems substituted with a quaternary nitrogen group such as Basic Yellow 57, Basic Red 76, Basic Blue 99, Basic Brown 16 and Basic Brown 17, as well as direct dyes which contain a heterocycle which has at least one quaternary nitrogen atom, in particular Basic Yellow 87, Basic Orange 31 and Basic Red 51. Cationic direct dyes, which are sold under the trademark Arianor ^®, are also particularly preferred cationic substantive dyes according to the invention. Suitable nonionic substantive dyes are in particular nonionic nitro and quinone dyes and neutral azo dyes. Preferred nonionic substantive dyes are those 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 1, HC Red 13, HC Red BN, HC Blue 2, HC Blue 11, HC Blue 12, Disperse Blue 3, HC Violet 1, Disperse Violet 1, Disperse Violet 4, Disperse Black 9 known compounds, 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, Picramic acid and its salts, 2-amino-6-chloro-4-nitrophenol, 4-ethylamino-3-nitrobenzoic acid and 2-chloro-6-ethylamino-4-nitrophenol. Dye combinations preferred according to the invention are those which contain at least the combination of tetrabromophenol blue and Acid Red 92; Tetrabromophenol blue and Acid Red 98; Tetrabromophenol blue and Acid Red 94; Tetrabromophenol Blue and Acid Red 87 or Tetrabromphenol Blue and Acid Red 51.

It is not necessary that the substantive dyes each represent uniform compounds. Rather, due to the production process for the individual dyes, minor amounts of other components may be included, as far as these do not adversely affect the dyeing result or for other reasons, e.g. toxicological, must be excluded.

For the strong lightening of very dark hair, the sole use of hydrogen peroxide or its addition products to organic or inorganic compounds is often not sufficient. In these cases, a combination of hydrogen peroxide and persulfates or peroxodisulfates is generally used in commercially available bleaching agents. It has been found that the addition of the acylpyridinium derivatives according to the invention of the general structure (I) and the alkalizing agents according to the invention alone already leads to a marked improvement in the brightening performance, so that the addition of persulfates can generally be dispensed with.

However, in a further embodiment, if the consumer wishes to have a very strong bleaching, it may be preferable if, in addition to hydrogen peroxide, the acylpyridinium compound of the formula (I) and the alkalizing agent mixture according to the invention, at least one inorganic persulfate salt or peroxodisulfate salt in the Means for lightening the keratinic fibers is included.

Preferred peroxodisulfate salts are ammonium peroxodisulfate, potassium peroxodisulfate and sodium peroxodisulfate. The peroxodisulfate salts can be used in an amount of from 0.1 to 25% by weight, in particular in an amount of from 0.5 to 15% by weight, based on the total weight of the ready-to-use Means, be included. These peroxodisulfates are also preferably added to the composition only immediately prior to use in order to avoid storage instabilities.

The compositions according to the invention are preferably used for lightening and bleaching human hair. Here, as desired by the user, the entire hair can be bleached or only certain parts of hair, such as highlights, which are optionally separated from the remaining hair, for example by means of films treated.

Another object of the invention is therefore a method for whitening human hair, characterized in that

(i) preparing a ready-to-use agent by mixing the means M1 and M2 of a multi-component packaging unit according to the preceding subject of the invention,

(ii) immediately after application of this ready-to-use agent is applied to the brightened hair parts,

(iii) leave for a period of time on the hair

(iv) and then the agent is rinsed from the hair.

The exposure time is 5 to 60 minutes, preferably 30 to 45 minutes, before the agent is finally rinsed out. The application temperatures can range between 15 and 40 ° C. After the exposure time, the remaining agent is removed by rinsing off the hair. The washing with a shampoo is eliminated if a strong surfactant-containing carrier was used.

In the context of this article of the invention mutatis mutandis the above statements apply analogously.

Another object of the present invention is the cosmetic use of an agent of the first subject of the invention for whitening ke ratin-containing fibers, in particular human hair.

It has been found that the combination of an acylpyridinium derivative of the formula (I) with an alkalizing agent selected from triethanolamine, 2-amino-2-methylpropan-1-ol, 2-amino-2-methylpropane-1,3-diol , Lysine, ornithine and / or a Alkalisierungsmittelgemisch of at least one basic amino acid and at least one alkanolamine, not only the brightening performance of Blondiermitteln at least maintained, but additionally low-odor formulations are obtained, which are well tolerated by the skin and with respect to irritation of the scalp and Nasal mucous membranes possess more advantageous properties than the prior art known.

Beisiele

Developer dispersions E1 to E6

Blondiercremes B1 to B14

Used commercial products: Stabylene 30 INCI name: Acrylates / Vinyl Isodecanoate Crosspolymer (Sigma)

Texapon NSO approx. 28% active; INCI name: Sodium Laureth Sulfate (Cognis)

Turpinal SL approx. 60% active substance; INCI name: Etidronic Acid (Thermophos)

Developer dispersions E1 to E6 are each mixed with one of Blondiercremes B1 to B14 in a weight ratio of 1: 1 to a freshly prepared application preparation. These application preparations have a pH of about 9 to 1 1. The application preparations with the Blondiercreme B1 are not according to the invention.

Claims

P a n t a n s p r e c h e

Agent for lightening keratinic fibers, characterized in that it is in a cosmetically acceptable carrier

(i) at least one acylpyridinium derivative of the formula (I) (I), in which

R _{1 is} a C ₁ -C ₆ alkyl group, a C ₂ -C ₆ alkenyl group, a C ₂ -C ₆ hydroxyalkyl group, a C ₁ -C ₆ alkoxy C ₂ -C ₆ alkyl group, a carboxy C ₂ C ₆ alkyl group, an aryl C 1 -C ₆ alkyl group, a heteroaryl C 1 -C ₄ alkyl group, an aryl group or a heteroaryl group,

R 2, R 3 and R 4 each independently represent hydrogen, a C 6 -C 6 alkyl group

X ^"represents a physiologically acceptable anion,

and

(Iii) contains at least hydrogen peroxide as the oxidizing agent.

2. Composition according to claim 1, characterized in that at least one acylpyridinium derivative of the formula (I) is present, which is selected from at least one compound of the group which is formed from 4-acetyl-1-methylpyridinium p-toluenesulfonate, 4- Acetyl-1-methylpyridinium-benzenesulfonate, 4-acetyl-1-methylpyridinium hydrogensulfate, 4-acetyl-1-methylpyridinium acetate, 4-acetyl-1-allylpyridinium p-toluenesulfonate, 4-acetyl-1-allylpyridinium-benzenesulfonate, 4-acetyl- 1- allyl pyridinium hydrogen sulfate, 4-acetyl-1-allyl pyridinium acetate, 2-acetyl-1-methyl pyridinium p-toluenesulfonate, 2-acetyl-1-methyl pyridinium benzenesulfonate, 2-acetyl-1-methyl pyridinium hydrogen sulfate, 2-acetyl-1-methyl pyridinium acetate, 2-Acetyl-1-allylpyridinium p-toluenesulfonate, 2-acetyl-1-allylpyridinium-benzenesulfonate, 2-acetyl-1-allylpyridinium hydrogensulfate and 2-acetyl-1-allylpyridinium acetate, especially 4-acetyl-1-methylpyridinium p-toluenesulfonate , Agent according to one of claims 1 to 2, characterized in that the acylpyridinium derivatives of the formula (I) in a weight fraction of 0.1 to 10 wt .-%, in particular from 0.2 to 4 wt .-%, and in particular 0.5 to 2 wt .-%, each based on the total weight of the composition are included.

Agent according to one of claims 1 to 3, characterized in that the agent contains as alkalizing agent at least one alkalizing agent mixture of at least one basic amino acid and at least one alkanolamine.

Composition according to one of claims 1 to 4, characterized in that the means as alkalizing agent at least one alkalizing agent mixture of at least one basic amino acid selected from arginine, histidine, lysine and ornithine, and at least one alkanolamine selected from ethanolamine, triethanolamine, 2-amino 2-methylpropan-1-ol and 2-amino-2-methylpropane-1,3-diol.

Composition according to one of claims 1 to 5, characterized in that the means as alkalizing agent at least one alkalizing agent mixture selected from the combination of arginine and ethanolamine, the combination of arginine and 2-amino-2-methylpropan-1-ol, the combination of lysine and 2-amino-2-methylpropan-1-ol, and / or the combination of lysine and ethanolamine.

Agent according to one of claims 1 to 6, characterized in that it has a pH of 7.5 to 12, preferably 8.5 to 11, 5, and particularly preferably from 9 to 1 1.

Multi-component packaging unit (kit-of-parts), comprising at least two separately assembled containers, wherein

a first container C1 at least one agent M1, containing in a cosmetically acceptable carrier as oxidizing agent at least hydrogen peroxide, and

a second container C2 at least one agent M2, comprising in a cosmetically acceptable carrier at least one alkalizing agent selected from triethanolamine, 2-amino-2-methylpropan-1-ol, 2-amino-2-methylpropane-1,3-diol, lysine, Ornithine and / or an alkalizing agent mixture of at least one basic amino acid and at least one alkanolamine,

characterized in that at least one of the means M1 and / or M2 contains an acylpyridinium derivative of the formula (I) according to claim 1. Cosmetic use of a composition according to any one of claims 1 to 7 for lightening ke ratin-containing fibers, in particular human hair.

0. A process for the lightening of human hair, characterized in that

(i) preparing a ready-to-use agent by mixing the means M1 and M2 of a multi-component packaging unit according to claim 8,

(iii) leave for a period of time on the hair

(iv) and then the agent is rinsed from the hair.