WO2016139119A1

WO2016139119A1 - Bleaching agents having methionyl methionine

Info

Publication number: WO2016139119A1
Application number: PCT/EP2016/053966
Authority: WO
Inventors: Erik Schulze Zur Wiesche
Original assignee: Henkel Ag & Co. Kgaa
Priority date: 2015-03-04
Filing date: 2016-02-25
Publication date: 2016-09-09
Also published as: DE102015203820A1

Abstract

The invention relates to agents for lightening keratinic fibers, in particular human hair, containing at least two preparations (A) and (B) packed separately from one another and, if appropriate, a further preparation (C) packed separately from (A) and (B), which preparations are mixed immediately before application to form an application mixture, wherein i) preparation (A) contains at least one persulfate salt, ii) preparation (B) contains hydrogen peroxide, and iii) preparation (A) further and/or preparation (B) further and/or preparation (C) further contain/s methionyl methionine. The invention further relates to agents for lightening keratinic fibers, in particular human hair, which contain hydrogen peroxide and methionyl methionine in a cosmetic carrier.

Description

BLONDING AGENT WITH METHIONYLMETHIONINE

The present invention relates to agents for the oxidative color change in the field of cosmetics, which are particularly suitable for lightening keratinic fibers, especially human hair.

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 - optionally with the use of ammonia or other alkalizing agents - as the oxidant alone, is sufficient to achieve a stronger

Bleaching effect is usually a mixture of hydrogen peroxide and Peroxodisulfatsalzen and / or Peroxomonosulfatsalzen used.

For reasons of stability, commercially available bleaching agents are usually offered in two separate packaged preparations, which are ready to be used immediately before use

Application preparation are mixed. Conventionally, commercial bleaching agents consist of a liquid oxidizing agent preparation and a powder containing solid oxidizing agents. Products with other components are also offered commercially.

The oxidative treatment of keratinic fibers not only leads to the desired Aufhellergebnis, it pollutes the fibers and can damage the fiber structure in the worst case. In order to minimize these negative effects, care products are used in conventional Blondiermitteln, which have repairing and conditioning effects. From WO 2014/183882 A1, for example, bleaching agents are known, the keratin hydrolyzate (s) and / or silicone oils as

Contain care products.

There continues to be a need for powerful bleaching agents containing one or more conditioners that can compensate for damage to the hair structure by the oxidizing agent and, for example, improve the feel or combability of the hair after bleaching.

It has now been found that a bleaching agent containing methionylmethionine can improve the sensory properties of hair after oxidative treatment. Furthermore, particularly good brightening results are achieved with the bleaching agent.

A first object of the present invention is a means of brightening keratinic Fibers, in particular human hair, containing at least two separately packaged preparations (A) and (B) and optionally another preparation (C) separate from (A) and (B), which are mixed into an application mixture immediately before use, in which

i) preparation (A) contains at least one persulfate salt,

ii) preparation (B) contains hydrogen peroxide and

iii) Preparation (A) Further and / or Preparation (B) Further and / or Preparation (C)

Contains methionylmethionine.

Under keratinic fibers or keratin fibers are furs, wool, feathers and especially human hair to understand. Although the agents are primarily suitable for dyeing keratin fibers, in principle, there is nothing to prevent their use in other areas as well.

The preparations (A) are preferably in powder form. In this case, powders of solid constituents with different grain sizes can be used. It may usually be preferred, however, if the powders have as homogeneous a grain size as possible, in particular in order to facilitate a uniform dispersion or dissolution of the powders in the preparations (B).

Formulations (A) may contain the active ingredients in a solid cosmetic carrier. A solid cosmetic carrier may contain salts of silicic acid, in particular salts of silicates and metasilicates with ammonium, alkali metals and alkaline earth metals. In particular, metasilicates which according to formula (SiO 2) n (M 2 O) _m , where M is an ammonium ion, an alkali metal or a half stoichiometric equivalent of an alkaline earth metal, are characterized by the ratio between n and m of <1 and are in the form of chainlike polymeric structures Anions [SiCb] ^2- can be preferred, can be used. Sodium metasilicate of the formula [IsfeSiCb], is particularly preferred. Likewise preferred are those silicates which consist of a silicate of the formula

(SiO 2) n (Na 2 O) m (K 2 O) _P where n is a positive rational number and m and p are independently a positive rational number or 0, with the provisos that at least one of the parameters m or p is different from 0 and the ratio between n and the sum of m and p is between 2: 1 and 4: 1.

Furthermore, the solid cosmetic carrier may contain so-called Rieselhilfen, the one

To prevent clumping or caking of the powder components. Water-soluble, hydrophobing or moisture-adsorbing powders of kieselguhr, pyrogenic silicic acids, calcium phosphate, calcium silicates, aluminum oxide,

Magnesium oxide, magnesium carbonate, zinc oxide, stearates, fatty amines and the like in question. Finally, the solid cosmetic carrier may additionally contain a dedusting agent, which prevents the dust formation of the powdered ingredients. In particular, inert oils can be used for this purpose. The solid, cosmetic carriers preferably contain, as dedusting agents, ester oils or mineral oils, preferably hydrocarbon oils, such as liquid paraffin oil.

As the first essential ingredient, the preparation (A) contains at least one persulfate salt.

Suitable persulfate salts are inorganic peroxo compounds. These are preferably selected from ammonium peroxodisulfate, alkali metal peroxodisulfates, ammonium peroxomonosulfate,

Alkali metal peroxomonosulfates, alkali metal peroxodiphosphates and / or alkaline earth metal peroxides. Particularly preferred are ammonium peroxodisulfate and / or alkali metal peroxodisulfates.

In a preferred embodiment of the present invention, preparation (A) contains as persulfate salt at least one peroxodisulfate salt, in particular selected from

Ammonium peroxodisulfate and / or potassium peroxodisulfate and / or sodium peroxodisulfate and / or potassium hydrogen peroxomonosulfate.

Furthermore, it has proved to be particularly preferred if the preparations (A) contain at least two different peroxodisulfates. Preferred peroxodisulfate salts are combinations of ammonium peroxodisulfate with potassium peroxodisulfate and / or sodium peroxodisulfate.

The preparations (A) contain persulfate salts preferably in an amount of 0.1 to 80 wt .-%, preferably from 2 to 60 wt .-%, particularly preferably from 3 to 50 wt .-% and particularly preferably 5 to 45 wt. -%, in each case based on the total weight of the preparation.

The preparations (B) and optionally (C) contain the active ingredients in a flowable, cosmetic carrier. The basis of the flowable, cosmetic carrier is preferably aqueous or aqueous-alcoholic. For the purpose of hair bleaching such carriers are for example transparent gels or surfactant-containing foaming solutions, such as shampoos, foam aerosols or other preparations which are suitable for use on the hair. A preferred, flowable carrier contains at least 40 wt .-%, in particular at least 50 wt .-% water in the context of the invention. 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 preparations (B) and, if appropriate, (C) may additionally each contain further organic solvents, for example methoxybutanol, ethyldiglycol, 1,2-propylene glycol, n-propanol, n-butanol, n-butylene glycol, glycerol, Diethylene glycol monoethyl ether, and diethylene glycol mono-n-butyl ether. Preference is given to all water-soluble organic solvents.

The preparations (B) contain hydrogen peroxide as the oxidizing agent.

The concentration of a hydrogen peroxide solution in the preparation (B) is determined on the one hand by the legal requirements and on the other hand by the desired effect.

The preparations (B) preferably contain hydrogen peroxide in amounts of from 0.5 to 30% by weight, preferably from 1 to 20% by weight, particularly preferably from 5 to 15% by weight and more preferably from 6, by weight to 12 wt .-%, explicitly 6, 7, 8, 9, 10, 1 1 or 12 wt .-%.

Preferred ready-to-use agents are characterized in that they contain, based on the total weight of the ready-to-use agent, 0.01 to 12 wt .-%, preferably 0.1 to 10% by weight, particularly preferably 3 to 9 wt .-% hydrogen peroxide ,

To stabilize the hydrogen peroxide, the pH of the preparation (B) can be adjusted to pH 3 to 5, particularly preferably to pH 3.5 to 4.5 and particularly preferably to pH 3.8 to 4.2.

The agents for lightening keratinic fibers contain methionylmethionine as a further essential ingredient.

Methionylmethionine is the dipeptide of methionine and has the following structure:

From the dipeptide methionylmethionine exist the four different stereoisomers DD, LL, DL and LD. Of the four stereoisomers, only the L-methionyl-L-methionine is natural, the three other dipeptides L-methionyl-D-methionine, D-methionyl-L-methionine and D-methionyl-D-methionine are all not natural. The described positive effects in hair treatment compositions can be achieved with all four stereoisomeric dipeptides. The methionylmethionine can be used as a DD / LL / LD / DL mixture, be used as DL / LD mixture or DD / LL mixture. In principle, the use of a stereoisomeric dipeptide alone or in combination with one or two further stereoisomers is conceivable. If only one stereoisomeric dipeptide is used, preference is given to choosing L-methionyl-L-methionine or D-methionyl-D-methionine.

The two pairs DD / LL-methionylmethionine and DL / LD-methionylmethionine are diastereomeric and have different physical data. For example, this has

Diastereomeric pair DD / LL at room temperature a solubility of 21, 0 g / l in water, whereas the solubility of the pair of diastereomers DL / LD is 0.4 g / l. Accordingly, it may be preferable to use the methionylmethionine as a DD / LL mixture or as a DD / LL / LD / DL mixture with a high proportion of the DD / LL diastereomeric pair.

The agents contain the methionyl methionine preferably in an amount of 0.01 to 30.0 wt .-% and particularly preferably from 0.1 to 5.0 wt .-%, each based on the weight of the total composition.

The methionylmethionine may be present in preparation (A) and / or in preparation (B) and / or in preparation (C), if present. However, it is preferred that the methionyl methionine is included in preparation (A), preparation (B) or preparation (C), if present. A preparation in this case preferably contains the methionyl methionine in an amount of from 0.01 to 30.0% by weight and more preferably from 0.1 to 5.0% by weight, in each case based on the weight of the preparation.

Most preferably, the methionylmethionine is included in preparation (A) or in preparation (B).

Another object of the invention is an agent for whitening keratinic fibers, in particular human hair, containing in a cosmetic carrier hydrogen peroxide and methionylmethionine.

This keratin fiber lightening agent may be used as a preparation (B) in a keratin fiber lightening agent containing at least two separately packaged preparations (A) and (B).

The amount of hydrogen peroxide is based on the total weight of the agent - preferably 3 to 9 wt .-%. The pH of the agent may be from 8 to 10. It has been shown that the use of methionylmethionine in the agents outstanding

Lends properties. The treated / lightened hair has a reduced

Hair damage in the form of an increased melting temperature and increased tensile strength. In addition, the wet and dry combability is improved.

The agents may include other active ingredients and adjuvants. These are described below.

The viscous properties of formulation (B) are important for their good miscibility and high stability. The preparations (B) therefore preferably have a viscosity of from 1 .000 mPa.s to 50,000 mPa.s, preferably from 5,000 mPa.s to 45,000 mPa.s and more preferably from 7,000 mPa.s to 40,000 mPa.s during measurements with a Brookfield rotary viscometer, spindle size 4, at 25 ° C and 4 rpm. The ready-mixed and ready-to-use agents preferably have a viscosity of 10,000 mPa-s to 50,000 mPa-s and more preferably from 18,000 mPa-s to 30,000 mPa-s when measured with a Brookfield rotary viscometer, spindle size 5, at 25 ° C and 4 Upm up.

Furthermore, the pH adjustment is important for good miscibility and stability.

Preference is given to ready-mixed and ready-to-use agents whose pH is between 9 and 12.

Furthermore, it may be advantageous if preparation (B) contains at least one nonionic surfactant, preferably at least one ethoxylated fatty alcohol with 40 to 60 ethylene oxide units. This is an addition product of ethylene oxide to a fatty alcohol to understand. Fatty alcohols are saturated and unsaturated alcohols having 12 to 24 carbon atoms, which may be linear or branched. The molar amount of ethylene oxide used per mole of fatty alcohol is understood to mean the degree of ethoxylation. Particularly suitable nonionic surfactant are ethylene oxide addition products of octyl alcohol (capryl alcohol), nonyl alcohol (pelargonyl alcohol), undecyl alcohol, undec-10-en-1-ol, dodecyl alcohol (lauryl alcohol), 2,6,8-trimethyl-4-nonanol ( Isolauryl alcohol), tridecyl alcohol, tetradecyl alcohol (myristyl alcohol), pentadecyl alcohol,

Hexadecyl alcohol (cetyl / palmityl alcohol), heptadecyl alcohol, octadecyl alcohol (stearyl alcohol), isostearyl alcohol, (9Z) octadec-9-en-1-ol (oleyl alcohol), (9E) octadec-9-en-1-ol (elaidyl alcohol) , (9Z, 12Z) octadeca-9,12-dien-1-ol (linoleyl alcohol), (9Z, 12Z, 15Z) octadeca-9,12,15-triene-1-ol (linolenyl alcohol), nonadecane-1 -ol (nonadecyl alcohol), eicosan-1-ol (eicosyl alcohol / arachyl alcohol), (9Z) -eicos-9-en-1-ol (gadoleyl alcohol), (5Z, 8Z, 11Z, 14Z) -eicosa-5,8 , 1 1, 14-tetraene-1-ol

(Arachidonic alcohol), heneicosyl alcohol, docosyl alcohol (behenyl alcohol), (13Z) -docos-13-en-1-ol (erucyl alcohol) or (13E) -docosen-1-ol (brassidyl alcohol). It is also possible to use mixtures of Fatty alcohols, which are obtained by specific mixing or by recovery processes as such use. Examples are coconut oil (mixture of Cs-Cis fatty alcohols) or cetearyl alcohol (1: 1 mixture of C 16- and Cis-fatty alcohols).

Preferred degrees of ethoxylation are from 20 to 60. Preferred nonionic surfactants of the ethoxylated fatty alcohol type are ceteareth-20 and ceteareth-50.

Furthermore, the agents may contain alkalizing agents. Preferred alkalizing agents are, for example, ammonia, alkanolamines, basic amino acids, as well as inorganic

Alkalizing agents such as (earth) alkali metal hydroxides, (earth) alkali metal metasilicates, (earth)

Alkali metal phosphates and (earth) alkali metal hydrogen phosphates. Lithium, sodium and / or potassium are preferably used as metal ions. Particularly preferred alkalizing agent is ammonia.

Suitable inorganic alkalizing agents are preferably selected from sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, sodium phosphate, potassium phosphate, sodium silicate, potassium silicate, magnesium silicate, sodium carbonate and potassium carbonate. Particularly preferred are sodium hydroxide and / or potassium hydroxide.

Alkanolamines as alkalizing agents are preferably selected from primary, secondary or tertiary amines having a C2-C6-Alkylgrundkörper which carries at least one hydroxyl group.

Particularly preferred alkanolamines are selected from the group formed from 2-aminoethane-1-ol (monoethanolamine), 3-aminopropan-1-ol, 4-aminobutan-1-ol, 5-aminopentan-1-ol, 1 Aminopropan-2-ol (monoisopropanolamine), 1-aminobutan-2-ol, 1-aminopentan-2-ol, 1-aminopentan-3-ol, 1-aminopentan-4-ol, 2-amino-2-methyl propanol, 2-amino-2-methylbutanol, 3-amino-2-methylpropan-1-ol, 1-amino-2-methylpropan-2-ol, 3-aminopropane-1, 2-diol, 2-amino-2-ol methylpropane-1, 3-diol, 2-amino-2-ethyl-1, 3-propanediol, Ν, Ν-dimethyl-ethanolamine, methylglucamine, triethanolamine, diethanolamine and triisopropanolamine. Particularly preferred alkanolamines are

Monoethanolamine, 2-amino-2-methyl-propanol and triethanolamine.

Basic amino acids as alkalizing agents are preferably selected from the group consisting of L-arginine, D-arginine, D / L-arginine, L-lysine, D-lysine, D / L-lysine, L-ornithine, D-ornithine , D / L-ornithine, L-histidine, D-histidine and / or D / L-histidine. Particularly preferably, L-arginine, D-arginine and / or D / L-arginine are used as an alkalizing agent.

Some customers find the intense odor of ammonia annoying or disturbing. Although ammonia is a preferred alkalizing agent, therefore, ready for use Preference is given to preparations which are free of ammonia. Preferred alkalizing agents for preparations which are free of ammonia are monoethanolamine, 2-amino-2-methyl-propanol and triethanolamine.

The preparations (A) and (B) can be mixed with further separately packaged preparations immediately before use to form an application mixture.

In a preferred embodiment of the invention, the composition additionally contains at least one further preparation (C) separate from preparations (A) and (B), preparation (C) containing at least one alkalizing agent.

Regardless of whether preparation (C) and / or preparation (B) and / or further preparations comprise alkalizing agents, where alkalizing agents are used, those agents which contain alkalizing agents in an amount of 0.05 to 20% by weight are preferred. , in particular from 0.5 to 10 wt .-%, each based on the total weight of the total composition.

To further increase the whitening power, preparation (C) may additionally be added as bleach booster a silicon-containing compound. This is preferably selected from the group consisting of silicic acid, alkali metal silicates and alkaline earth metal silicates.

It is particularly advantageous if the whitening or bleaching agents for matting undesired residual color impressions, in particular in the reddish or bluish range, contain certain direct dyes of the complementary colors. These are dyes that are applied directly to the hair and do not require an oxidative process to form the color.

Direct dyes are usually nitrophenylenediamines, nitroaminophenols, azo dyes, anthraquinones or indophenols. Direct dyes are known as anionic, cationic and nonionic substantive dyes. The substantive dyes are each preferably used in an amount of 0.001 to 2 wt .-%, based on the total application preparation.

Furthermore, the agents may contain other active ingredients, auxiliaries and additives, such as, for example, nonionic polymers, cationic polymers, anionic polymers, zwitterionic and amphoteric polymers, structuralants, further hair conditioning compounds, others

fiber-structure-improving agents, other surfactants, dyes for staining the agent,

Antidandruff active ingredients, amino acids, oligopeptides, protein hydrolysates on animal and / or vegetable basis, light stabilizers, UV blockers, vitamins, provitamins, vitamin precursors, Plant extracts, fats, waxes, swelling and penetrating substances, opacifiers, pearlescing agents, thickeners and pigments.

A third object of the invention is the use of methionylmethionine in an agent for lightening keratinic fibers, in particular human hair, for the reduction of

Hair damage.

With respect to further preferred embodiments of the use mutatis mutandis applies to the means said.

Another object of the invention is a method for color change keratinischer fibers in which at least two separately packaged preparations (A) and (B), of which preparation (A) at least one persulfate salt and preparation (B) contains hydrogen peroxide, mixed into an application mixture are applied to the fibers and rinsed again after an exposure time, characterized in that preparation (A) further and / or preparation (B) further and / or preparation (C) contains methionylmethionine.

The ready-to-use agents are prepared immediately before use on the hair by mixing the two preparations (A) and (B) and optionally a third preparation (C) and / or other preparations. For ready-to-use resources consisting of more than two

Preparations are mixed to a finished application mixture, it may be irrelevant whether initially two preparations are mixed together and then the third

Preparation is added and mixed in, or if all preparations together

be merged and then mixed. The mixing can be done by stirring in a bowl or a cup or by shaking in a sealable container.

The term "immediate" is to be understood as a period of a few seconds to one hour, preferably up to 30 minutes, in particular up to 15 minutes.

The ready-to-use agents are used in a process for lightening keratinic fibers, especially human hair, in which the agent is applied to the keratin-containing fibers, at a temperature of from room temperature to 45 ° C for a period of time of 10 to 60 minutes on the fiber and then rinsed with water or washed out with a shampoo. The exposure time of the ready-to-use agents is preferably 10 to 60 minutes, in particular 15 to 50 minutes, particularly preferably 20 to 45 minutes. During the exposure time of the agent on the fiber, it may be advantageous to assist the lightening process by supplying heat. The heat supply can be done by an external heat source, such as with the help of a hot air blower, as well as, especially in a hair lightening on the living subjects, by the body temperature of the subject. In the latter option, usually the brightening lot is covered with a hood. An exposure phase at room temperature is also possible. The temperature during the exposure time is preferably between 20 ° C and 40 ° C, in particular between 25 ° C and 38 ° C. The brightening agents give good bleaching and brightening results even at physiologically compatible temperatures of below 45 ° C.

After the end of the reaction time, the remaining Aufhellzubereitung with water or a

Cleanser rinsed out of the hair. As a cleaning agent can in particular

Serve commercially available shampoo, in particular then can be dispensed with the detergent and the rinsing can be done with tap water when the brightener has a strong surfactant-containing carrier.

With respect to further preferred embodiments of the method mutatis mutandis applies to the means said.

The following examples are intended to illustrate the subject matter of the present invention without, however, limiting it.

Examples

All amounts are, unless otherwise stated, parts by weight of active substance. The following formulations were provided using known preparation methods.

Example 1 Composition Composition (A) for bleaching agent from two preparations

Ingredient A1 A2 A3 A4 A5 A6 A7 A8

EDTA Na2 1, 51 1 1, 51 1, 51 1, 51 1, 51 1, 51 1, 51

Magnesium carbonate 8.0 7.5 7.0 8.0 9.0 8.0 8.0 8.0

Aerosil® 200 3.02 1 3 3 3 3 3 3

Sodium metasilicate FE anhydrous 4.7 5.0 5.5 4.0 4.5 4.7 4.7 4.7

Sodium disilicate 31, 05 30.0 31, 0 30.5 31, 5 31, 05 31, 0 31, 0

Rohagit® S hv 2.75 4.05 1 2.5 3.5

Cekol® 50000 1, 1 1, 0 1, 5 1, 0 1, 1 1, 1

Ammonium oxodipersulfate +

0.5% silica 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0

Potassium peroxodisulfate 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0

Sodium peroxodisulfate 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0

Paraffinum Liquidum 3.6 3.6 3.6 3.6 3.6 3.6 3.6 3.6

Perfume 0,2 0,2 0,2 0,2 0,2 0,2 0,2 0,2

DL-methionyl-DL-methionine 1, 0 3.0 5.0 1, 5 2.0

L-Methionyl-L-methionine 1, 0 1, 5 4.0

* Raw materials used: Aerosil® 200 (INCI name: Silica (Evonik Degussa)), Rohagit® S hv (INCI name: Acrylates Copolymer (Evonik Röhm)), Cekol® 50000 (INCI name:

Cellulose gum (CP Kelco)), LAPONITE XLG (INCI name: Sodium magnesium silicate (Roockwood Additives)), LAPONITE XLS (INCI name: Sodium magnesium silicate and

Tetrasodium pyrophosphate (Roockwood Additives) Example 2 Composition Composition (B) for bleaching agent from two preparations

Ingredient B1 B2 B3 B4 B5

Water, fully desalinated ad 100 ad 100 ad 100 ad 100 ad 100

Caustic soda 45% techn. 0.73 0.73 0.73 0.73 0.73

Dipicolinic acid 0.1 0.1 0.1 0.1 0.1

Disodium dihydrogen diphosphate 0.03 0.03 0.03 0.03 0.03

HEDP 60% 1, 5 1, 5 1, 5 1, 5 1, 5

Keltrol CG-SFT 2 1, 5 1 0,5

1, 2-propanediol 4 2 4 4 4

Hydrogen peroxide 50% 18 18 18 18 18

used raw materials: Keltrol CG-SFT (INCI name: Xanthan Gum (CP Kelco))

Claims

Composition for lightening keratinic fibers, in particular human hair, containing at least two separately packaged preparations (A) and (B) and, optionally, another preparation (C) separate from (A) and (B), which is immediately before

Application to be mixed into an application mixture, wherein

i) preparation (A) contains at least one persulfate salt,

ii) preparation (B) contains hydrogen peroxide and

iii) preparation (A) furthermore and / or preparation (B) furthermore and / or preparation (C) contains / contains methionylmethionine.

Composition according to claim 1, characterized in that the persulfate salt is selected from the group consisting of ammonium peroxodisulfate, alkali metal peroxodisulfates,

Ammonium peroxomonosulfate, alkali metal hydrogen peroxomonosulfates and mixtures thereof.

Composition according to claim 3, characterized in that the persulfate salt is selected from the group consisting of ammonium peroxodisulfate, potassium peroxodisulfate, sodium peroxodisulfate, potassium hydrogen peroxomonosulfate and mixtures thereof.

Composition according to one of claims 1 to 6, characterized in that the preparation (B) - based on their total weight - 0.5 to 30 wt .-% hydrogen peroxide.

Composition for lightening keratinic fibers, in particular human hair, containing in a cosmetic carrier hydrogen peroxide and methionylmethionine.

Composition according to one of claims 1 to 5, characterized in that the methionylmethionine is a mixture of L-methionyl-L-methionine, L-methionyl-D-methionine, D-methionyl-L-methionine and D-methionyl-D-methionine ,

Agent according to one of claims 1 to 5, characterized in that the methionyl methionine is L-methionyl-L-methionine and / or D-methionyl-D-methionine.

Agent according to one of claims 5 to 7, characterized in that the amount of

Hydrogen peroxide - based on the total weight of the composition - 3 to 9 wt .-% is.

Agent according to one of claims 5 to 8, characterized in that the pH of the agent from 8 to 10.

10. The use of methionylmethionine in a composition for whitening keratinic fibers, in particular human hair, for the reduction of hair damage.