Oil-in-water emulsion for improved oxidative lightening of keratin fibers

Abstract

The present invention relates to an agent in the form of an oil-in-water emulsion for the oxidative lightening of keratin fibers with improved lightening performance, as well as to a method for oxidative lightening using the aforementioned oxidative lightening agent in the form of an emulsion.

Description

[0001] December 1, 2025

[0002] "Oil-in-water emulsion for improved oxidative brightening of keratin fibers"

[0003] The present invention relates to an oxidative brightening agent for keratinous fibers in the form of an oil-in-water emulsion with improved brightening performance, which also has optimized application properties, and to a method for oxidative brightening using the aforementioned oxidative brightening agent in emulsion form.

[0004] Lightening one's hair color has always been a desire for many consumers, as blonde hair is considered attractive and fashionable. Various bleaching agents with different levels of strength are available on the market for this purpose. The oxidizing agents contained in these products lighten the hair fiber by oxidatively destroying the hair's natural pigment, melanin. For a moderate bleaching effect, hydrogen peroxide—possibly with the addition of ammonia or other alkalizing agents—is sufficient as the oxidizing agent alone. To achieve a stronger bleaching effect, a mixture of hydrogen peroxide and at least one compound selected from persalts, particularly peroxodisulfate salts and / or peroxomonosulfate salts, is typically used.To enhance the bleaching effect, these products contain higher concentrations of hydrogen peroxide and persalts, especially persulfates. Dark, dark brown, or black hair can thus be lightened by 4 to 6 shades in one step.

[0005] Oxidative lightening agents are used to lighten or bleach keratin fibers, especially hair. Oxidative lightening agents typically consist of two components: one component contains a high concentration of at least one alkalizing agent.

[0006] Conventional oxidative bleaching agents have a more alkaline pH value, usually well above 8.5, to accelerate the reaction during oxidative application. This pH is achieved using alkalizing agents such as alkanolamines, ammonia, or inorganic bases. Ammonia, in particular, enables good lightening results, but its odor and potential to irritate skin and mucous membranes also present disadvantages for the user. The alkalizing agent causes the keratin fibers to swell, allowing the oxidizing agent to penetrate the hair effectively. However, the alkaline pH also intensifies the damaging effect of the oxidizing agent on the hair structure. This damage to the hair structure, which is particularly noticeable quickly, involves the flaking of the cuticle, the outer layer of the keratin fiber.This manifests as increased roughness, a less pleasant feel, reduced shine, and decreased fiber stability. The roughened cuticle structure allows small molecules, such as water, to escape more quickly. As a result, damaged hair loses further suppleness and elasticity. To reduce hair damage caused by alkaline oxidative lightening agents, fats or oils are frequently used in these products. Furthermore, when ammonium hydroxide and ammonium salts are used as alkalizing agents, the content of oil and / or fat components can reduce the release of ammonia after application to the hair. The leveling effect of the hair lightening agent can also be improved by the presence of oil and / or fat components, resulting in a less selective lightening effect, meaning that both damaged and undamaged areas of the keratin fibers are lightened to approximately the same degree.

[0007] Another problem that arises when using conventional hair lightening products is scalp irritation. These products typically need to remain on the hair for at least 30 minutes to achieve satisfactory lightening. During this time, the product naturally comes into contact with the scalp. The high pH level and the oxidizing agent contained in the application mixture can irritate the scalp. This can be very uncomfortable for the user. Even after the oxidative hair lightening treatment is complete, the discomfort in the scalp can persist.

[0008] State of the art

[0009] Patent application US 2017 / 0354581 A1 discloses oxidative hair coloring agents containing the direct dyes Basic Blue 124 and HC Blue No. 16. Some of the coloring creams contain the glucose surfactant lauroyl / myristoyl methyl glucamide in combination with glyceryl stearate SE and anionic surfactants or fatty alcohols. Dye-free lightening agents are not disclosed.

[0010] The present application was therefore based on the task of providing a means for the oxidative lightening of keratinous fibers with improved lightening performance.

[0011] It has now been found that an oxidative brightening agent, based on an oil-in-water emulsion with a selected mixture of anionic and non-ionic surfactants and emulsifiers as well as fatty alcohols, exhibits excellent brightening performance.

[0012] The present invention relates, in a first embodiment, to an agent for the oxidative lightening of keratinous fibers, in particular human hair, which is in the form of an oil-in-water emulsion and which, based on its weight, contains the following components: a) 45 to 85 wt.%, preferably 50 to 80 wt.%, particularly preferably 55 to 75 wt.%, most preferably 60 to 70 wt.% water, b) at least one nonionic surfactant selected from alkyl mono- and oligoglycosides of formula R 4 O-[G] P , in the R 4c) for an alkyl or alkenyl group with 4 to 22 carbon atoms, G for a sugar group with 5 or 6 carbon atoms, and p for a positive rational number in the range of 1 to 6, in a total amount of 0.5–15 wt.%, preferably 1.0–12 wt.%, particularly preferably 1.2–6.0 wt.%, and extraordinarily preferably 1.3–4.0 wt.%; c) at least one linear 1-alkanol with 8 to 40 carbon atoms in a total amount of 5–15 wt.%, preferably 7–13 wt.%, and particularly preferably 9–11 wt.%; d) at least one compound selected from glycerol mono- and diesters of linear or branched, saturated or unsaturated C12-Cso carboxylic acids, which may be hydroxylated, in a total amount of 1–10 wt.%, preferably 2– 7 wt.%, particularly preferably 3 - 5 wt.%, e) at least one glucose-based surfactant different from the surfactants b) in a total amount of 0.5 - 10.0 wt.%, preferably 1.0 - 8.0 wt.%.-%, particularly preferably 1.5 - 6.0 wt.%, extraordinarily preferably 1.8 - 5.0 wt.%, f) at least one alkalizing agent, g) zero to less than 0.1 wt.% of peroxide compounds, h) no oxidation dye precursors, wherein the agent has a pH value in the range of 8.0 to 11.5, preferably in the range of 9.0 to 11.0, particularly preferably in the range of 9.5 to 10.7, extraordinarily preferably 9.8 to 10.5, in each case measured at a temperature of 20 °C.

[0013] Surfactants and emulsifiers as defined in this application are amphiphilic (bifunctional) compounds consisting of at least one hydrophobic and at least one hydrophilic molecular moiety. The hydrophobic moiety is preferably a hydrocarbon group with 8-28 carbon atoms, which may be saturated or unsaturated, linear or branched. A linear Ca-C28 alkyl group is particularly preferred. Key properties of the surfactants and emulsifiers include oriented absorption at interfaces, aggregation into micelles, and the formation of lyotropic phases.

[0014] All information concerning the states of matter (solid, liquid, gaseous) in this application refers to standard conditions. For the purposes of this application, "standard conditions" are a temperature of 25°C and a pressure of 1013.25 mbar.

[0015] The composition according to the invention is an oil-in-water emulsion. The composition according to the invention further comprises the alkalizing component of a two-part oxidative lightening agent, which is mixed with an aqueous hydrogen peroxide solution shortly before application and then applied to the hair.

[0016] The composition according to the invention contains, based on its weight, 45 to 85 wt.%, preferably 50 to 80 wt.%, particularly preferably 55 to 75 wt.%, and most preferably 60 to

[0017] 70% by weight water.

[0018] Another mandatory component of the compositions according to the invention and preferred according to the invention is a content of at least one nonionic surfactant selected from alkyl mono- and oligoglycosides of formula R 4 O-[G] P , in the R 4where G represents an alkyl or alkenyl group with 4 to 22 carbon atoms, G represents a sugar group with 5 or 6 carbon atoms, and p represents a positive rational number in the range of 1 to 6, in a total amount of 0.5–15 wt.%, preferably 1.0–12 wt.%, particularly preferably 1.2–6.0 wt.%, and most preferably 1.3–4.0 wt.%, in each case based on the weight of the composition according to the invention. It was surprisingly found that alkyl mono- and oligoglycosides of formula R 4 O-[G] P In a total quantity of 0.5 - 15.0 wt.%, it significantly contributes to improving the whitening performance of the product, especially in combination with the other mandatory components c), d) and f). At the same time, other advantageous application properties, in particular the homogeneity of the whitening result and the washability of the application mixture from the keratin fibers, are surprisingly improved.

[0019] Preferred sugars from which the sugar residue G of the nonionic surfactant of formula R is formed 4 O-[G] P The selected substances are erythrose, threose, erythrulose, ribose, deoxyribose, arabinose, glucose, fructose, galactose, xylose, lyxose, allose, altrose, mannose, gulose, idose, talose, fucose and rhamnose, with glucose, galactose, fructose, fucose and rhamnose being particularly preferred and glucose being extraordinarily preferred.

[0020] The alkyl mono- and oligoglycosides of formula R 4 O-[G] P , in the R 4Where G represents an alkyl or alkenyl group with 4 to 22 carbon atoms, G represents a sugar group with 5 or 6 carbon atoms, and p represents a positive rational number from 1 to 6, the following compounds, with G, contain a sugar group with 5 or 6 carbon atoms derived from aldoses or ketoses with 5 or 6 carbon atoms, preferably glucose. The preferred alkyl mono- and oligoglycosides are thus alkyl mono- and oligoglycosides. The subscript p in the general formula indicates the degree of oligomerization (DP), i.e., the distribution of mono- and oligoglycosides, and represents a positive rational number between 1 and 6. While p must always be an integer in a single molecule and can take the values ​​p = 1 to 6, the value p for an industrially produced alkyl oligoglycoside is an analytically determined calculated quantity, usually a fraction.Preferably, alkyl mono- and oligoglycosides with a mean degree of oligomerization p of 1.1 to 3.0, preferably 1.5 to 2.0, are used. From an application-related point of view, alkyl mono- and oligoglycosides with a degree of oligomerization less than 1.7, and particularly in the range of 1.2 to 1.6, are preferred. The alkyl group R. 4It is derived from primary alcohols with 4 to 22, preferably 8 to 18, and particularly preferably 8 to 12 carbon atoms. Typical examples are butanol, capron alcohol, caprylic alcohol, capric alcohol, and undecyl alcohol, as well as their technical mixtures, such as those obtained, for example, during the hydrogenation of technical fatty acid methyl esters or during the hydrogenation of aldehydes from Roelen's oxo synthesis. Alkyl oligoglucosides of chain length Ca-Cio (DP = 1 to 3) are preferred. These are obtained as foreshots during the distillative separation of technical Ca-Cio coconut fatty alcohol and may be contaminated with less than 6 wt% Ci₂ alcohol, as well as alkyl oligoglucosides based on technical Cg / n oxo alcohols (DP = 1 to 3). These are commercially available under the INCI name Caprylyl / Capryl Glucoside. A commercially available alkyl oligoglucoside product is also preferred, the alkyl group of which R 4It is derived from technical-grade calcium hydroxide (Ca-Cia) coconut fatty alcohol and is available under the INCI name Coco-Glucoside. The alkyl group R 4 It can also be derived from primary alcohols with 12 to 22, preferably 12 to 14 carbon atoms. Typical examples are lauryl alcohol, myristyl alcohol, cetyl alcohol, palmitoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, arachiyl alcohol, gadoleyl alcohol, behenyl alcohol, erucyl alcohol, brassidyl alcohol, and their technical mixtures, which can be obtained as described above. Alkyl oligoglucosides based on lauryl alcohol with a DP of 1 to 3 are preferred.

[0021] Preferred agents according to the invention are characterized in that at least one non-ionic surfactant selected from alkyl mono- and oligoglycosides of formula R is included. 4 O-[G] P , in the R 4G represents an alkyl or alkenyl group with 4 to 22 carbon atoms, G represents a sugar group with 5 or 6 carbon atoms, and p represents a positive rational number in the range of 1 to 6, in a total amount of 0.5 - 15 wt.%, preferably 1.0 - 12 wt.%, particularly preferably 1.2 to 6.0 wt.%, and most preferably 1.3 to 4.0 wt.%, in each case based on the weight of the agent.

[0022] Further preferred agents according to the invention are characterized in that at least one alkyl oligoglycoside of formula R is included. 4 O-[G] P , in the R 4for an alkyl group with 8 to 18, preferably 8 to 12 carbon atoms, G for a glucose group and p for positive rational numbers from 1, 1 to 2, is selected from caprylyl glucoside, capryl glucoside, lauryl glucoside, n-tetradecyl glucoside, cetyl glucoside, stearyl glucoside, arachidyl glucoside, behenyl glucoside and mixtures of these glucosides, in particular mixtures called cocoglucoside, mixtures of caprylyl glucoside and capryl glucoside and mixtures of caprylyl glucoside, capryl glucoside and cocoglucoside.

[0023] A further mandatory component of the compositions according to the invention, and of preferred compositions according to the invention, is a content of at least one linear 1-alkanol with 8 to 40 carbon atoms in a total amount – based on the weight of the composition – of 5–15 wt.%, preferably 7–13 wt.%, and particularly preferably 9–11 wt.%. It was surprisingly found that linear 1-alkanols with 8 to 40 carbon atoms in a total amount of 5–15 wt.% contribute significantly to the brightening performance of the composition, especially in combination with the other mandatory components b), d), and f). At the same time, other advantageous application properties, in particular the homogeneity of the brightening result and the viscosity stability of the application mixture from the keratin fibers, are surprisingly improved.

[0024] Preferred agents according to the invention are characterized in that the at least one linear 1-alkanol with 8 to 40 carbon atoms is selected from octan-1-ol (octyl alcohol, caprylic alcohol), decan-1-ol (decyl alcohol, capric alcohol), dodecan-1-ol (dodecyl alcohol, lauryl alcohol), tetradecan-1-ol (tetradecyl alcohol, myristyl alcohol), hexadecan-1-ol (hexadecyl alcohol, cetyl alcohol, palmityl alcohol), octadecan-1-ol (octadecyl alcohol, stearyl alcohol), eicosan-1-ol (eicosyl alcohol, arachidyl alcohol), docosan-1-ol (docosyl alcohol, behenyl alcohol), (13E)-docosen-1-ol (brassidyl alcohol), (13Z)-docos-13-en-1-ol (erucyl alcohol) and lanolin alcohol, as well as mixtures thereof.

[0025] A further mandatory component of the compositions according to the invention, and of preferred compositions according to the invention, is a content of at least one compound selected from glycerol mono- and diesters of linear or branched, saturated or unsaturated C12-Cso carboxylic acids, which may be hydroxylated, in a total amount of 1-10 wt.%, preferably 2-7 wt.%, and particularly preferably 3-5 wt.%, in each case based on the weight of the composition. It was surprisingly found that glycerol mono- and diesters of linear or branched, saturated or unsaturated C12-Cso carboxylic acids in a total amount of 1-10 wt.% contribute significantly to the brightening performance of the composition, particularly in combination with the other mandatory components b), c), and f).At the same time, other advantageous application properties, in particular the homogeneity of the brightening result and the viscosity stability of the application mixture made from the keratin fibers, are surprisingly improved.

[0026] Preferred agents according to the invention are characterized in that the at least one compound selected from glycerol mono- and diesters of linear or branched, saturated or unsaturated C12-C30 carboxylic acids, which may be hydroxylated, is selected from glycerol mono- and diesters of linear or branched, saturated or unsaturated C12-C30 carboxylic acids, which may be hydroxylated, having formula (II): (II) wherein

[0027] R1, R2 and R3 independently represent a hydrogen atom or a grouping of formula (III), (III), wherein

[0028] R4 represents a linear saturated or linear unsaturated Cn-C29 alkyl group, with the proviso that at least one and at most two of the residues selected from R1, R2, and R3 represent a grouping of formula (III). Particularly preferred compositions according to the invention are characterized in that the at least one glycerol mono- or diester is selected from glycerol monostearate, glycerol distearate, glycerol monooleate, glycerol dioleate, glycerol monocaprinate, glycerol dicaprinate, glycerol dicaprinate, glycerol monolaurate, glycerol dilaurate, glycerol monomyristate, glycerol dimyristate, glycerol monopaimitate, glycerol dipalmitate, glycerol mono-12-hydroxystearate, glycerol di-12-hydroxystearate, glycerol monolanolate, glycerol dilanolate, and mixtures of these substances.

[0029] According to the invention, exceptionally preferred agents are characterized in that at least two glycerol mono- or diesters of formula (II) are contained, wherein in at least one of these esters the at least one residue R4 represents a linear, saturated Cn-C29 alkyl group and in at least one of these esters the at least one residue R4 represents a linear, unsaturated Cn-C29 alkyl group.

[0030] The R4 group in formula (III) represents an unbranched or branched, saturated or unsaturated Cii-C27 alkyl group.

[0031] Preferably, R4 represents an unbranched, saturated Cn-C27 alkyl group. More preferably, R4 represents an unbranched, saturated Ci3-C23 alkyl group. Particularly preferably, R4 represents an unbranched, saturated Ci5-Ci7 alkyl group.

[0032] Preferred agents according to the invention are characterized in that at least one compound from the group of formulas (I ala) to (I Id) is included as a glyceryl fatty acid ester of general formula (II):

[0033] The compounds of formulas (I ala) to (I Id) are also known as glyceryl monostearate and glyceryl monopalmitate.

[0034] Further preferred compositions according to the invention are characterized in that at least one compound from the group of formulas (Ile) to (II h) is included as the glyceryl fatty acid ester of general formula (II):

[0035] The compounds of formula (Ile) to (llh) are also known as glyceryl distearate and glyceryl dipalmitate.

[0036] Further preferred agents according to the invention are characterized in that at least one compound from the group of formulas (Ha) to (11h) is included as the glyceryl fatty acid ester of formula (II).

[0037] Further particularly preferred agents according to the invention are characterized in that at least one compound selected from glyceryl monostearate, glyceryl distearate, glyceryl monopalmitate and glyceryl dipalmitate is included as the glyceryl fatty acid ester of formula (II).

[0038] Further particularly preferred agents according to the invention are characterized in that the glyceryl fatty acid ester of formula (II) is a mixture of glyceryl monostearate, glyceryl distearate, glyceryl monopalmitate and glyceryl dipalmitate.

[0039] Further particularly preferred agents according to the invention are characterized in that at least one compound selected from glyceryl monooleate and glyceryl dioleate as well as mixtures thereof is included as the glyceryl fatty acid ester of formula (II).

[0040] Further exceptionally preferred compositions according to the invention are characterized in that the glyceryl fatty acid esters of formula (II) are a mixture of glyceryl monostearate, glyceryl distearate, glyceryl monopalmitate, glyceryl dipalmitate, glyceryl monooleate, and glyceryl dioleate. According to the invention, it may be preferred to use only a single glyceryl fatty acid ester of formula (II). In another, far more preferred embodiment, the compositions according to the invention contain mixtures, in particular technical mixtures, of at least four glyceryl fatty acid esters of formula (II). A technical mixture is understood to be, for example, a commercial product such as Cutina® GMS, which is a mixture of glyceryl monostearate, glyceryl distearate, glyceryl monopalmitate, and glyceryl dipalmitate. In this mixture, the molar ratio of monoester to diester is approximately 1:1.Another technically preferred emulsifier mixture according to the invention is the commercial product Cutina® GMS SE, which contains a mixture of glyceryl monostearate, glyceryl distearate, glyceryl monopalmitate, and glyceryl dipalmitate, wherein "SE" stands for "self-emulsifying". In addition to the mixture of glyceryl monostearate, glyceryl distearate, glyceryl monopalmitate, and glyceryl dipalmitate, the commercial product Cutina® GMS SE contains 5–10% by weight, preferably 7–8% by weight, of potassium stearate, based on its weight.

[0041] It follows that further particularly preferred compositions according to the invention are characterized in that, in addition, a total amount of 0.1 - 1 wt.%, based on the weight of the composition, contains at least one salt of a saturated or unsaturated C10-C22-alk(en)ylcarboxylic acid with a monovalent cation, which is preferably selected from the sodium, potassium, ammonium and monoethanolamine salts of myristic acid, cetyl acid, palmitoleic acid, stearic acid, isostearic acid, oleic acid, elaidic acid, petroselinic acid, arachidic acid, gadoleic acid, behenic acid, erucic acid and brassidic acid as well as their technical mixtures.

[0042] A further mandatory component of the composition according to the invention is a content of at least one glucose-based surfactant, different from the surfactants b), in a total amount of 0.5–10.0 wt.%, preferably 1.0–8.0 wt.%, particularly preferably 1.5–6.0 wt.%, and most preferably 1.8–5.0 wt.%, in each case based on the weight of the composition. Such a surfactant makes a surprising contribution to the lightening performance of the bleaching agent, particularly in combination with the other mandatory components b), c), and d). At the same time, other advantageous application properties, in particular the homogeneity of the lightening result and the softness of the keratin fibers after completion of the treatment according to the invention, are surprisingly improved.

[0043] Preferred agents according to the invention are characterized in that the glucose-based surfactant e), which differs from the surfactants b), is selected from N-acyl-N-methylglucamides of formula (I) where the acyl group R 5 CO- is derived from a linear or branched, saturated or unsaturated Ca-C22 carboxylic acid, which may be hydroxylated.

[0044] Further preferred compositions according to the invention are characterized in that the at least one N-acyl-N-methylglucamide of formula (I) is selected from N-capryloyl-N-methylglucamide, N-caproyl-N-methylglucamide, N-lauroyl-N-methylglucamide, N-myristoyl-N-methylglucamide, N-palmitoyl-N-methylglucamide, N-stearoyl-N-methylglucamide, N-arachidoyl-N-methylglucamide, N-behenoyl-N-methylglucamide, and from mixtures of these compounds, in particular from mixtures designated as N-cocoyl-N-methylglucamide.

[0045] Further compositions preferred according to the invention are characterized in that the at least one N-acyl-N-methylglucamide of formula (I), which is preferably selected from N-capryloyl-N-methylglucamide, N-caproyl-N-methylglucamide, N-lauroyl-N-methylglucamide, N-myristoyl-N-methylglucamide, N-palmitoyl-N-methylglucamide, N-stearoyl-N-methylglucamide, N-arachidoyl-N-methylglucamide, N-behenoyl-N-methylglucamide, as well as from mixtures of these compounds, in particular from mixtures designated N-cocoyl-N-methylglucamide, is contained in a total amount of 0.5 - 10.0 wt.%, preferably 1.0 - 7.0 wt.%, particularly preferably 2.0 - 6.0 wt.%, and most preferably 4.0 to 5.0 wt.%, based on the weight of the composition.

[0046] Further preferred agents according to the invention are characterized in that the glucose-based surfactant e), which differs from the surfactants b), is selected from the salts of C8-C18 alkyl oligoglucoside carboxylates, wherein the degree of oligomerization p' of these compounds is a rational number in the range of 1 to 3, preferably in the range of 1 to 2.

[0047] Further preferred agents according to the invention are characterized in that the at least one anionic surfactant, selected from the salts of C8-C18 alkyl oligoglucoside carboxylates, is selected from the salts of lauryl glucose carboxylate, caprylyl glucose carboxylate, capryl glucose carboxylate, myristyl glucose carboxylate, cetyl glucose carboxylate, stearyl glucose carboxylate, as well as from mixtures of these compounds, preferably selected from the salts of lauryl glucose carboxylate, caprylyl glucose carboxylate, capryl glucose carboxylate, myristyl glucose carboxylate, as well as from mixtures of these compounds, in particular from mixtures designated as cocyl glucose carboxylate.

[0048] Further preferred compositions according to the invention are characterized in that the at least one anionic surfactant, selected from the salts of C8-C18 alkyl oligoglucoside carboxylates, is selected from the salts of lauryl glucose carboxylate, caprylyl glucose carboxylate, capryl glucose carboxylate, myristyl glucose carboxylate, cetyl glucose carboxylate, stearyl glucose carboxylate, as well as from mixtures of these compounds, preferably selected from the salts of lauryl glucose carboxylate, caprylyl glucose carboxylate, capryl glucose carboxylate, myristyl glucose carboxylate, as well as from mixtures of these compounds, in particular from mixtures designated as cocyl glucose carboxylate, wherein all the aforementioned C8-C18 alkyl oligoglucoside carboxylates each have a degree of oligomerization p' in the range of 1 to 2.

[0049] The sodium salt of at least one C8-C18 alkyloligoglucoside carboxylate is particularly preferred. Another preferred salt is the magnesium salt of the at least one C8-C18 alkyloligoglucoside carboxylate. However, the lithium, potassium, and ammonium salts, as well as the mono-, di-, and trialkanolammonium salts with 2 to 4 carbon atoms in the alkanol group of the at least one C8-C18 alkyloligoglucoside carboxylate, are also preferred according to the invention.

[0050] Further preferred compositions according to the invention are characterized in that the at least one anionic surfactant, selected from the salts of C8-C18 alkyl oligoglucoside carboxylates, which are preferably selected from the salts of lauryl glucose carboxylate, caprylyl glucose carboxylate, capryl glucose carboxylate, myristyl glucose carboxylate, cetyl glucose carboxylate, stearyl glucose carboxylate, as well as from mixtures of these compounds, preferably selected from the salts of lauryl glucose carboxylate, caprylyl glucose carboxylate, capryl glucose carboxylate, myristyl glucose carboxylate, as well as from mixtures of these compounds, in particular from mixtures designated as cocyl glucose carboxylate, wherein all the aforementioned C8-C18 alkyl oligoglucoside carboxylates each have a degree of oligomerization p' in the range of 1 to 2, in a total amount of 0.5 - 10.0 wt.%, preferably 1.0 - 7.0 wt. %, particularly preferably 1.5 - 4.0 wt.-%, most preferably 1.7 to 2.5 wt.%, based on the weight of the agent.

[0051] Further preferred compositions according to the invention are characterized by a content of at least one anionic surfactant selected from non-ethoxylated C8-C18 alkyl sulfates, in a total amount of 3-10 wt.%, preferably 4-8 wt.%, particularly preferably 5-7 wt.%, in each case based on the weight of the composition according to the invention. It was surprisingly found that non-ethoxylated C8-C18 alkyl sulfates in a total amount of 3-10 wt.% further enhance the whitening performance and also contribute to the scalp compatibility of the composition, particularly in combination with the other mandatory components b), c), d) and e).

[0052] At the same time, other advantageous application properties, in particular the spreadability on the keratin fibers, the homogeneity of the whitening result and the washability of the application mixture from the keratin fibers, are surprisingly improved.

[0053] Preferred compositions according to the invention are characterized in that the at least one anionic surfactant, selected from non-ethoxylated C8-C18 alkyl sulfates, is selected from n-octyl sulfate, 2-ethylhexyl sulfate, n-decyl sulfate, lauryl sulfate, n-tetradecyl sulfate, cetyl sulfate, stearyl sulfate, and mixtures of these sulfates, in particular mixtures designated as cocosulfate, wherein the at least one C8-C18 alkyl sulfate is present in salt form. The at least one non-ethoxylated C8-C18 alkyl sulfate is particularly preferably used as a sodium salt. Another preferred salt is the magnesium salt of the at least one non-ethoxylated C8-C18 alkyl sulfate. However, the lithium, potassium and ammonium salt as well as the mono-, di- and trialkanolammonium salt with 2 to 4 C atoms in the alkanol group of the at least one non-ethoxylated C8-C18 alkyl sulfate are also preferred according to the invention.

[0054] Further preferred compositions according to the invention are characterized in that they additionally contain at least one non-ionic surfactant selected from ethoxylated Cs-Cso alkanols with 4-100 mol of ethylene oxide per mol, with ethoxylated castor oil with 7-80 mol of ethylene oxide per mol, with ethoxylated sorbitan monoesters of linear saturated and unsaturated C12-Cso carboxylic acids, which may be hydroxylated, in particular those of myristic acid, palmitic acid, stearic acid or of mixtures of these fatty acids, as well as mixtures of the aforementioned substances, particularly preferably in a total amount of 0.1-4.0 wt.%, preferably 0.5-2.0 wt.%, particularly preferably 1.0-1.5 wt.%, in each case based on the weight of the composition.

[0055] According to the invention, preferred additional nonionic surfactants from the above-mentioned list are selected from ethoxylated Cs-Cso alkanols with the formula R 1 O(CH2CH2O) nH, where R 1 Represents a linear or branched alkyl and / or alkenyl group with 8–30 carbon atoms, and n represents the average number of ethylene oxide units per molecule, for numbers from 4–100, preferably 6–30, particularly preferably 12–20. Preferably, the R group is derived from 1from an alkanol selected from caprylic alcohol, 2-ethylhexyl alcohol, capric alcohol, lauryl alcohol, isotridecyl alcohol, tridecyl alcohol, myristyl alcohol, cetyl alcohol, palmitoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, arachiyl alcohol, gadoleyl alcohol, behenyl alcohol, erucyl alcohol, and brassidyl alcohol, as well as from their technical mixtures. Adducts of 4–100 moles of ethylene oxide to technical fatty alcohols with 12–18 carbon atoms, such as coconut, palm, palm kernel, or tallow fatty alcohols, are also suitable.Besonders bevorzugt sind Ceteth-20, Steareth-20, Ceteareth-20, Trideceth-6, lsotrideceth-6, Undeceth-6, Myreth-6, Laureth-10, Laureth-12, Laureth-15, Laureth-20, Laureth-30, Myreth-10, Myreth-12, Myreth-15, Myreth-20, Myreth-30, Ceteth-10, Ceteth-12, Ceteth-15, Ceteth-30, Stea- reth-10, Steareth-12, Steareth-15, Steareth-30, Oleth-10, Oleth-12, Oleth-15, Oleth-20, Oleth-30, Ceteareth-10, Ceteareth-15, Ceteareth-12, Ceteareth-15, Ceteareth-30 sowie Coceth-10, Coceth- 12, Coceth-15, Coceth-20 und Coceth-30; außerordentlich bevorzugt sind Ceteth-20, Steareth-20, Ceteareth-20, Ceteth-10, Ceteth-12, Ceteth-15, Ceteth-30, Steareth-10, Steareth-12, Steareth-15, und Steareth-30 sowie Mischungen hiervon.

[0056] Further preferred non-ionic surfactants according to the invention from the above list are selected from castor oil ethoxylated with 7 - 80 mol ethylene oxide per mol, are selected from castor oil ethoxylated with 20 - 65 mol ethylene oxide per mol, are particularly preferred from castor oil ethoxylated with 30 - 60 mol ethylene oxide per mol, are extraordinarily preferred from castor oil ethoxylated with 40 - 55 mol ethylene oxide per mol.

[0057] Particularly preferred compositions according to the invention contain at least one nonionic surfactant, which is at least one of the aforementioned ethoxylated surfactants, in a total amount of 0.1–4.0 wt.%, preferably 0.5–2.0 wt.%, and particularly preferably 1.0–1.5 wt.%, in each case based on the weight of the composition. Further particularly preferred compositions according to the invention contain at least one nonionic surfactant selected from ethoxylated Ca-Cso-alkanols with the formula R 1 O(CH2CH2O) n H, where R1 represents a linear or branched alkyl and / or alkenyl group with 8 to 30 carbon atoms, derived from caprylic alcohol, 2-ethylhexyl alcohol, capric alcohol, lauryl alcohol, isotridecyl alcohol, tridecyl alcohol, myristyl alcohol, cetyl alcohol, palmitoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, arachiyl alcohol, gadoleyl alcohol, behenyl alcohol, erucyl alcohol and brassidyl alcohol as well as their technical mixtures, and where n represents numbers from 12 to 20, in a total amount of 0.1 to 4.0 wt.%, preferably 0.5 to 2.0 wt.%, particularly preferably 1.0 to 1.5 wt.%, in each case based on the weight of the agent.

[0058] These ethoxylated non-ionic surfactants can further support the improvement of whitening performance.

[0059] As already mentioned above, the composition according to the invention represents the alkalizing component of a two-part oxidative lightening agent, which is mixed with an aqueous hydrogen peroxide solution shortly before application and then applied directly to the hair. Such alkalizing components are frequently formulated as a cream, because the composition requires a certain consistency to remain on the keratin fibers to be treated during the exposure time of the lightening oxidative treatment agent without dripping off. Linear 1-alkanols with 8 to 40 carbon atoms, so-called fatty alcohols, usually act as consistency enhancers; this is the obligatory component c) of the composition according to the invention. To ensure that the cream can be easily rinsed out of the keratin fibers after the exposure time, it also contains surfactants, mostly anionic surfactants, in particular non-ethoxylated C8-C18 alkyl sulfates.Alkyl mono- and oligoglycosides, so-called APGs, as well as other glucose-based surfactants, are also well-suited as cleansing surfactants, even though they are nonionic. It is generally accepted in the scientific community that surfactants, especially anionic surfactants, have a higher potential for skin irritation than fatty alcohols. Therefore, to formulate a particularly skin- and scalp-friendly lightening agent, a specialist would have kept the surfactant content relatively low compared to the amount of fatty alcohols.

[0060] During the present development work, it was surprisingly discovered that – at least with the surfactants b) and e) selected according to the invention and the preferably included non-ethoxylated C8-C18 alkyl sulfates – a particularly high whitening performance is achieved when, based on weight, at least as much surfactant as fatty alcohols or even more surfactant than fatty alcohols are present. Therefore, the most preferred compositions according to the invention are characterized in that the weight ratio of the total weight of components b), e) and non-ethoxylated C8-C18 alkyl sulfates to the total weight of component(s) c) is in the range of 0.8 to 1.6, preferably in the range of 0.9 to 1.5, and particularly preferably in the range of 1.0 to 1.4.

[0061] Surprisingly, it was found that the skin compatibility properties of the inventive agents (M1) can be improved by the addition of at least one further fat component, which differs from the mandatory components c) and d).

[0062] Further preferred means (M1) according to the invention are characterized in that they additionally contain at least one fat component which differs from the mandatory components c) and d) and which is selected from oils and fat components that are liquid at 25°C and have a melting point in the range of >25°C to 120°C, as well as mixtures thereof.

[0063] Fatty components according to the invention are lipophilic organic substances that have a water solubility of at most 0.001 wt% or less at 20°C. According to the invention, these fatty substances include oils, fats, and waxes. Linear saturated fatty alcohols are considered nonionic water-in-oil emulsifiers according to the invention. Essential oils and perfume oils or fragrances are also not considered fatty substances within the meaning of the present invention.

[0064] Particularly preferred compositions (M1) according to the invention are characterized in that the at least one fatty component, which differs from the obligatory components c) and d), is selected from branched and saturated or unsaturated alkanols with 6 to 30 carbon atoms, glycerol triesters of linear or branched, saturated or unsaturated, optionally hydroxylated calcium-io fatty acids, dicarboxylic acid esters of linear or branched omega-2-citro-alkanols, esters of branched saturated or unsaturated fatty alcohols with 2 to 30 carbon atoms with linear or branched saturated or unsaturated fatty acids with 2 to 30 carbon atoms, which may be hydroxylated, mineral oil, isoparaffins, polydecenes, silicone oils and mixtures thereof, preferably selected from branched and saturated or unsaturated alkanols with 6 to 30 carbon atoms, glycerol triesters of linear or branched, saturated or unsaturated,optionally hydroxylated Ca-ao fatty acids, dicarboxylic acid esters of linear or branched O2-Cio-alkanols, esters of branched saturated or unsaturated fatty alcohols with 2-30 carbon atoms with linear or branched saturated or unsaturated fatty acids with 2-30 carbon atoms, which may be hydroxylated, and mixtures thereof.

[0065] Among the oils preferred according to the invention, which are liquid at 25°C and are selected from branched saturated or unsaturated fatty alcohols with 6 - 30 carbon atoms, are 2-octyldodecanol, 2-hexyldecanol, and 2-ethylhexyl alcohol, of which 2-octyldodecanol is particularly preferred.

[0066] Further oils preferred according to the invention are selected from the triglycerides of linear or branched, saturated or unsaturated, optionally hydroxylated calcium-io fatty acids. The use of natural oils, e.g., argan oil, moringa oil, macadamia oil, apricot kernel oil, marula oil, soybean oil, cottonseed oil, sunflower oil, palm oil, palm kernel oil, linseed oil, almond oil, castor oil, corn oil, olive oil, rapeseed oil, sesame oil, safflower oil, wheat germ oil, peach kernel oil, and the liquid components of coconut oil and the like, as well as mixtures of these oils, can be particularly suitable. However, synthetic triglyceride oils or those obtained by transesterification of natural oils are also suitable, in particular capric / caprylic triglycerides, e.g., the commercial product Myritol® 318 (BASF) with unbranched fatty acid residues, as well as glyceryl triisostearin with branched fatty acid residues.Further oils particularly preferred according to the invention are selected from the dicarboxylic acid esters of linear or branched O2-Cio-alkanols, in particular diisopropyl adipate, di-n-butyl adipate, di-(2-ethylhexyl) adipate, dioctyl adipate, diethyl / di-n-butyl / dioctyl sebacate, diisopropyl sebacate, dioctyl malate, dioctyl maleate, dicaprylyl maleate, diisooctyl succinate, di-2-ethylhexyl succinate and di-(2-hexyldecyl) succinate.

[0067] Further oils that may be preferred according to the invention are selected from the esters of linear or branched saturated or unsaturated fatty alcohols with 2-30 carbon atoms, with linear or branched saturated or unsaturated fatty acids with 2-30 carbon atoms, which may be hydroxylated, and which are preferably selected from isopropyl myristate, isopropyl palmitate, isopropyl stearate, isopropyl isostearate, isopropyl oleate, isooctyl stearate, isonnyl stearate, isocetyl stearate, isononyl isononanoate, isotridecyl isononanoate, cetearyl isononanoate, 2-ethylhexyl laurate, 2-ethylhexyl isostearate, 2-ethylhexyl cocoate, 2-octyldodecyl palmitate, butyloctanoic acid 2-butyl octanoate, diisotridecyl acetate, n-butyl stearate, n-Hexyl laurate, n-decyl oleate, oleyl oleate, oleylerucate, erucyl oleate, erucylerucate, hexyl decyl stearate, hexyl decyl laurate, isodecyl neopentanoate, isononyl isononanoate, 2-ethylhexyl palmitate and 2-ethylhexyl stearate.

[0068] Further oils that may be preferred according to the invention are selected from the O8-O22 fatty alcohol esters of monohydric or polyhydric O2-O7 hydroxycarboxylic acids, in particular the esters of glycolic acid, lactic acid, malic acid, tartaric acid, citric acid and salicylic acid. It may be preferred according to the invention to use mixtures of the aforementioned oils.

[0069] Further preferred compositions (M1) according to the invention are characterized in that the at least one fat component, which differs from the obligatory components c) and d), is selected from fat components with a melting point in the range of >25°C to 120°C, preferably selected from paraffin wax, saturated n-alkanes with at least 20 carbon atoms, preferably with 22 to 60 carbon atoms, for example docosane, Butyrospermum parkii (shea butter), mango butter, cocoa butter and esters of saturated, monohydric Cs-Cis alcohols with saturated Ci2-Ci8 monocarboxylic acids, in particular stearyl laurate, cetearyl stearate, cetyl palmitate and myristyl myristate, esters of a saturated, monohydric Cie-Ceo-alkanol and a saturated Cs-Cse monocarboxylic acid, in particular cetyl behenate, stearyl behenate C20-C40- Alkyl stearate, candelilla wax, carnauba wax and beeswax, glycerol triesters of saturated linear C12-Cso carboxylic acids, which may be hydroxylated,especially castor wax, as well as mixtures of the aforementioned substances.

[0070] Further particularly preferred compositions (M1) according to the invention are characterized in that they contain at least one fat component, which is different from the obligatory components c) and d), in a total amount of 0.1 - 5 wt.%, preferably 0.2 - 4 wt.%, particularly preferably 0.5 - 3 wt.% and extraordinarily preferably 1 to 2 wt.%, in each case based on the weight of the composition (M1).

[0071] Essential oils and perfume oils or fragrances are not considered fatty substances within the meaning of the present invention. According to the invention, essential oils are understood to be mixtures of volatile components produced by steam distillation from plant raw materials, such as citrus oils. Whenever the present application refers to a cosmetic oil, this always refers to a cosmetic oil that is neither a fragrance nor an essential oil, is liquid under normal conditions, and is immiscible with water.

[0072] The definition of an odorant as used in this application corresponds to the professionally accepted definition found in the RÖMPP Chemistry Lexicon, dated December 2007. According to this definition, an odorant is a chemical compound with an odor and / or taste that stimulates the receptors of the hair cells of the olfactory system (adequate stimulus). The necessary physical and chemical properties are a low molar mass of no more than 300 g / mol, a high vapor pressure, minimal water solubility and high lipid solubility, weak polarity, and the presence of at least one osmophoric group in the molecule.In order to distinguish volatile, low-molecular-weight substances, which are usually and also within the meaning of the present application not regarded and used as fragrances but primarily as solvents, such as ethanol, propanol, isopropanol and acetone, from fragrances according to the invention, fragrances according to the invention have a molar mass of 74 to 300 g / mol, contain at least one osmophoric group in the molecule and have an odor and / or taste, that is, they excite the receptors of the hair cells of the olfactory system.

[0073] Particularly preferred compositions (M1) according to the invention are characterized in that they contain at least one essential oil, perfume oil or fragrance, preferably in a total amount of 0.1 - 3 wt.%, particularly preferably 0.2 - 1 wt.%, extraordinarily preferably 0.5 - 0.8 wt.%, in each case based on the weight of the composition according to the invention.

[0074] Preferred brightening agents according to the invention have a viscosity in the range of 5000 - 50000 mPas, preferably 5500 - 30000 mPas, particularly preferably 6000 - 25000 mPas, and extraordinarily preferably 6500 - 20000 mPas, each measured at 20°C.

[0075] The ready-to-use mixture of the brightening agent according to the invention or preferably according to the invention and the hydrogen peroxide solution preferably has a viscosity in the range of 5000-20000 mPas, preferably 6000-18000 mPas, particularly preferably 6500-15000 mPas, and most preferably 7000-12000 mPas, each measured at 20°C.

[0076] A Haake MVII rheometer can be used for measurement, for example at a shear rate of 7.2 revolutions per second.

[0077] Oxidative brightening processes on keratin fibers typically occur in a neutral to alkaline environment. Therefore, the pH value of the composition according to the invention is in the range of 8.0 to 11.5, preferably in the range of 9.0 to 11.0, particularly preferably in the range of 9.5 to 10.7, and most preferably in the range of 9.8 to 10.5, in each case measured at a temperature of 20 °C. As a further mandatory ingredient, the composition according to the invention therefore contains at least one alkalizing agent.

[0078] The alkalizing agents preferably suited for adjusting the pH value of the agents according to the invention are selected from ammonia, ammonium hydroxide, alkanolamines, alkali hydroxides, basic amino acids, alkali metal metasilicates, alkali metal disilicates, alkali phosphates and dialkali monohydrogen phosphates, as well as mixtures of these substances.

[0079] Preferred brightening agents according to the invention are characterized in that they contain no ammonia and no ammonium hydroxide.

[0080] Particularly preferred alkalizing agents are selected from alkanolamines, alkali hydroxides, basic amino acids, alkali metal metasilicates, alkali metal disilicates, alkali phosphates, and dialkali monohydrogen phosphates, as well as mixtures of these substances. The alkali metal ions in the aforementioned alkalizing salts are preferably lithium, sodium, or potassium, particularly sodium or potassium.

[0081] The basic amino acids that can be used 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, and mixtures thereof. Particularly preferred basic amino acids are L-arginine, L-lysine, and mixtures thereof.

[0082] The alkali hydroxides that can be used as alkalizing agents are preferably selected from sodium hydroxide and potassium hydroxide, as well as mixtures thereof. Potassium hydroxide is particularly preferred according to the invention.

[0083] The alkanolamines that can be used as alkalizing agents preferably have 2 to 9 carbon atoms in the molecule and are particularly preferably selected from primary amines with a C2-C6 alkyl core structure bearing at least one hydroxyl group. Particularly preferred alkanolamines are selected from the group formed from 2-aminoethanol-1-ol (monoethanolamine), 3-aminopropan-1-ol, 4-aminobutan-1-ol, 5-aminopentan-1-ol, 1-aminopropan-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-aminopropan-1,2-diol, and 2-amino-2-methylpropan-1,3-diol, as well as mixtures thereof. According to the invention, particularly preferred alkanolamines are selected from the group consisting of 2-aminoethan-1-ol, 2-amino-2-methylpropan-1-ol and 2-amino-2-methyl-propan-1,3-diol; 2-aminoethan-1-ol is especially preferred.However, secondary amines, such as diisopropanolamine (1,1'-lminodipropan-2-ol), are also suitable alkalizing agents according to the invention. Particularly preferred agents according to the invention contain 2-aminoethanol-1-ol, potassium hydroxide, L-arginine, L-lysine, and mixtures thereof as alkalizing agents. Extremely preferred brightening agents according to the invention contain a mixture of 2-aminoethanol-1-ol, potassium hydroxide, L-arginine, and L-lysine.

[0084] Preferred brightening agents according to the invention are characterized in that they contain at least one alkalizing agent in a total amount of 0.5–10 wt.%, preferably 0.7–7 wt.%, particularly preferably 1.0–5 wt.%, and most preferably 1.2–3 wt.%, based on the weight of the brightening agent. The agents according to the invention are intended for use in the oxidative brightening of keratin fibers, particularly human hair. In oxidative brightening processes, the agent according to the invention (M1), which is neutral or alkaline and optionally contains one or more direct dyes, is typically mixed with an aqueous hydrogen peroxide-containing composition (M2) having an acidic pH value immediately before application to the keratin fibers to form a ready-to-use brightening agent, and applied to the keratin fibers immediately after mixing.The neutral to alkaline medium of the application mixture activates the hydrogen peroxide, thereby breaking down the melanin in the keratin fibers. The compositions according to the invention contain, by weight, zero to less than 0.1% by weight of peroxide compounds.

[0085] The agent according to the invention for brightening keratinous fibers contains no oxidation dye precursors.

[0086] In order to achieve a balanced and subtle nuance formation or to mattify undesirable residual color impressions caused by melanin degradation products, especially in the reddish or bluish range, it is preferred according to the invention if further color-giving components are included in the oxidative brightening agent according to the invention.

[0087] In a further embodiment, the oxidative lightening agents according to the invention can therefore additionally contain at least one direct dye. These are dyes that adhere directly to the hair and do not require an oxidative process to develop the color. Direct dyes are typically nitrophenylenediamines, nitroaminophenols, azo dyes, anthraquinones, or indophenols.

[0088] Direct dyes can be anionic, cationic, or nonionic. The direct dyes are preferably present in an amount of 0.001 to 2% by weight, based on the weight of the oxidative brightening agent.

[0089] Preferred anionic direct dyes are the compounds known under the international names or trade names Acid Yellow 1, Yellow 10, Acid Yellow 23, Acid Yellow 36, Acid Orange 7, Acid Red 33, Acid Red 52, Acid Red 92, Pigment Red 57:1, Acid Blue 7, Acid Green 50, Acid Violet 43, Acid Black 1, Acid Black 52, Bromophenol Blue and Tetrabromophenol Blue. Preferred cationic direct-drawing dyes are cationic triphenylmethane dyes, for example 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; cationic anthraquinone dyes, such as HC Blue 16 (Bluequat B); and direct-drawing dyes containing a heterocycle having at least one quaternary nitrogen atom, in particular Basic Yellow 87, Basic Orange 31 and Basic Red 51.Another preferred cationic direct dye is Basic Blue 124. The cationic direct dyes marketed under the trademark Arianor are also preferred cationic direct dyes according to the invention. Nonionic direct dyes particularly suitable are nonionic nitro and quinone dyes and neutral azo dyes. Preferred nonionic direct dyes are those known under the international names...Handelsnamen 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 bekannten Verbindungen, sowie 1 ,4-Diamino-2-nitrobenzol, 2-Amino-4-nitrophenol, 1 ,4-Bis-(2-hydroxyethyl)-amino-2- nitrobenzol, 3-Nitro-4-(2-hydroxyethyl)aminophenol, 2-(2-Hydroxyethyl)amino-4,6-dinitrophenol, 4- [(2-Hydroxyethyl)amino]-3-nitro-1 -methylbenzol, 1-Amino-4-(2-hydroxyethyl)amino-5-chlor-2- nitrobenzol, 4-Amino-3-nitrophenol, 1-(2'-Ureidoethyl)amino-4-nitrobenzol, 2-[(4-Amino-2-nitrophe- nyl)amino]-benzoesäure, 6-Nitro-1 ,2,3,4-tetrahydrochinoxalin, 2-Hydroxy-1 ,4-naphthochinon, Pikraminsäure und deren Salze, 2-Amino-6-chloro-4-nitrophenol, 4-Ethylamino-3-nitrobenzoesäure und 2-Chlor-6-ethylamino-4-nitrophenol.According to the invention, at least one cationic direct-drawing dye selected from Basic Blue 7, Basic Blue 26, Basic Violet 2, Basic Violet 14, Basic Yellow 57, Basic Red 76, Basic Blue 99, Basic Brown 16, Basic Brown 17, HC Blue 16 (Bluequat B), Basic Blue 124, Basic Yellow 87, Basic Orange 31 and Basic Red 51, as well as mixtures thereof, is particularly preferred.

[0090] Further preferred compositions (M1) according to the invention are characterized in that they do not contain any polymer or copolymer with acrylate-, methacrylate- or vinyl-containing monomers and no polyurethane, i.e., that, based on their weight, 0.0 wt.% of the aforementioned (co-)polymers are contained in (M1).

[0091] Oxidative brightening agents containing ammonia or ammonium hydroxide release ammonia during the brightening process, so that non-volatile alkalizing agents, i.e., all alkalizing agents other than ammonia or ammonium hydroxide, may be preferred according to the invention. Therefore, for some applications according to the invention, it may be preferred that the agents according to the invention do not contain ammonia or ammonium hydroxide as alkalizing agents.

[0092] A further object of the present invention is a kit-of-parts package comprising, separately packaged, the following: i) at least one container (C1) containing an agent for the oxidative lightening of keratin fibers, in particular human hair, in the form of an oil-in-water emulsion, and which, based on its weight, contains the following components: a) 45 to 85 wt.%, preferably 50 to 80 wt.%, particularly preferably 55 to 75 wt.%, most preferably 60 to 70 wt.% water; b) at least one nonionic surfactant selected from alkyl mono- and oligoglycosides of formula R 4 O-[G] P , in the R 4c) for an alkyl or alkenyl group with 4 to 22 carbon atoms, G for a sugar group with 5 or 6 carbon atoms, and p for a positive rational number in the range of 1 to 6, in a total amount of 2.0–15.0 wt.%, preferably 3.0–12.0 wt.%, particularly preferably 5.0–10.0 wt.%, and most preferably 6.0–8.0 wt.%; c) at least one linear 1-alkanol with 8 to 40 carbon atoms in a total amount of 5–15 wt.%, preferably 7–13 wt.%, and particularly preferably 9–11 wt.%; d) at least one compound selected from glycerol mono- and diesters of linear or branched, saturated or unsaturated C12-Cso carboxylic acids, which may be hydroxylated, in a total amount of 1–10 wt.%, preferably 2–7 wt.%. wt.%, particularly preferably 3 - 5 wt.%, e) at least one glucose-based surfactant different from the surfactants b) in a total amount of 0.5 - 10.0 wt.%, preferably 1.0 - 8.0 wt.%.-%, particularly preferably 1.5–6.0 wt.%, extraordinarily preferably 1.8–5.0 wt.%, f) at least one alkalizing agent, g) zero to less than 0.1 wt.% of peroxide compounds, h) no oxidation dye precursors, wherein the composition has a pH in the range of 8.0 to 11.5, preferably in the range of 9.0 to 11.0, particularly preferably in the range of 9.5 to 10.7, extraordinarily preferably 9.8 to 10.5, in each case measured at a temperature of 20 °C, and ii) at least one container (C2) containing an oxidizing agent preparation (M2) comprising 40–96 wt.%, preferably 65–90 wt.%, particularly preferably 70–80 wt.%, water, furthermore hydrogen peroxide in a total amount of 0.5 to 23 wt.%, more preferably 2.5 to 21 wt.%, extraordinarily preferably 4 to 20 wt.%, most preferably 5 to 18 wt.% and most preferably 6 to 12 wt.%.-%, containing and having a pH value in the range of 2.0 to 6.5, preferably 2.5 - 5.5, particularly preferably 2.8 to 4.5, each measured at 20°C, wherein the wt. -% values ​​refer to the weight of the oxidizing agent preparation (M2), optionally containing at least one oil and / or at least one surfactant.

[0093] In a preferred embodiment according to the invention, this kit further comprises a separately packaged oxidizing agent preparation (M3) containing i) at least one oxidizing agent selected from the inorganic salts of a peroxosulfuric acid, as well as mixtures of these salts, and j) 0 to 10 wt.%, preferably 0.1 to 8 wt.%, particularly preferably 0.5 to 5 wt.% water, wherein the wt.% values ​​refer in each case to the weight of the oxidizing agent preparation (M3), k) wherein (M3) optionally contains at least one oil and / or at least one surfactant.

[0094] Regarding further preferred embodiments of the kit according to the invention, and preferred according to the invention, what has been said about the means for oxidative lightening according to the invention and preferred according to the invention applies mutatis mutandis. A further object of the present invention is the use of a means according to the invention or preferred according to the invention for the oxidative lightening of keratin fibers, in particular human hair. Regarding further preferred embodiments of the use according to the invention, what has been said about the means for oxidative lightening according to the invention and preferred according to the invention applies mutatis mutandis.

[0095] Another object of the present invention is the use of at least one glucose-based surfactant selected from

[0096] N-Acyl-N-methylglucamides of the formula (I) where the acyl group R 5CO- is derived from a linear or branched, saturated or unsaturated Ca-C22 carboxylic acid, which may be hydroxylated, and the salts of C8-C18 alkyl oligoglucoside carboxylates, wherein the degree of oligomerization p' of these compounds is a rational number in the range of 1 to 3, preferably in the range of 1 to 2, to improve the brightening performance of a whitening agent. Regarding further preferred embodiments of this use according to the invention, what has been said about the agents for oxidative whitening according to the invention and those preferred according to the invention applies mutatis mutandis.

[0097] A further object of the present invention is a process for oxidative lightening, comprising the following process steps: i) providing a cosmetic agent (M1) for the oxidative lightening of keratinous fibers, in particular human hair, which is in the form of an oil-in-water emulsion and which, based on its weight, contains the following components: a) 45 to 85 wt.%, preferably 50 to 80 wt.%, particularly preferably 55 to 75 wt.%, most preferably 60 to 70 wt.% water, b) at least one nonionic surfactant selected from alkyl mono- and oligoglycosides of formula R 4 O-[G] P , in the R 4c) for an alkyl or alkenyl group with 4 to 22 carbon atoms, G for a sugar group with 5 or 6 carbon atoms, and p for a positive rational number in the range of 1 to 6, in a total amount of 0.5–15 wt.%, preferably 1.0–12 wt.%, particularly preferably 1.2–6.0 wt.%, and most preferably 1.3–4.0 wt.%; c) at least one linear 1-alkanol with 8 to 40 carbon atoms in a total amount of 5–15 wt.%, preferably 7–13 wt.%, and particularly preferably 9–11 wt.%; d) at least one compound selected from glycerol mono- and diesters of linear or branched, saturated or unsaturated C12-Cso carboxylic acids, which may be hydroxylated, in a total amount of 1–10 wt.%, preferably 2–7 wt.%. wt.%, particularly preferably 3 - 5 wt.%, e) at least one glucose-based surfactant different from the surfactants b) in a total amount of 0.5 - 10.0 wt.%, preferably 1.0 - 8.0 wt.%.-%, particularly preferably 1.5–6.0 wt.%, extraordinarily preferably 1.8–5.0 wt.%, f) at least one alkalizing agent, g) zero to less than 0.1 wt.% of peroxide compounds, h) no oxidation dye precursors, wherein the composition has a pH value in the range of 8.0 to 11.5, preferably in the range of 9.0 to 11.0, particularly preferably in the range of 9.5 to 10.7, extraordinarily preferably 9.8 to 10.5, in each case measured at a temperature of 20 °C, and ii) providing an oxidizing agent preparation (M2) containing 40–96 wt.%, preferably 65–90 wt.%, particularly preferably 70–80 wt.%, water, furthermore hydrogen peroxide in a total amount of 0.5 to 23 wt.%, more preferably 2.5 to 21 wt.%, particularly preferably 4 to 20 wt.% wt.%, most preferably 5 to 18 wt.% and most preferably 6 to 12 wt.%.-%, and having a pH value in the range of 2.0 to 6.5, preferably 2.5 to 5.5, particularly preferably 2.8 to 4.5, each measured at 20°C, wherein the wt.% values ​​refer to the weight of the oxidizing agent preparation (M2), optionally containing at least one surfactant and / or an oil, iii) mixing the cosmetic agent (M1) with the oxidizing agent preparation (M2), preferably in a weight ratio (M1):(M2) in the range of 1:0.8 to 1:2.5, preferably 1:1 to 1:2, immediately followed by iv) applying the mixture obtained in step iii) to the hair and leaving this mixture on the hair for a time of 1 to 60 minutes, preferably 20 to 45 minutes, at room temperature and / or at 30–60°C, preferably at 32–50°C. v) Rinsing the hair with water and / or a cleansing composition, and vi) if necessary, applying a post-treatment product to the hair and, if necessary, rinsing, then drying.

[0098] For oxidative hair lightening processes, the inventive agent (M1), which is adjusted to an alkaline pH and optionally contains one or more oxidation dye precursors and, if necessary, one or more direct dyes, is typically mixed with an aqueous hydrogen peroxide-containing composition (M2) to form the ready-to-use lightening agent immediately before application to the hair and then applied directly to the hair. The inventive agent (M1) and the hydrogen peroxide-containing composition (M2) are usually formulated such that, at a mixing ratio of 1:1, based on parts by weight, the finished application mixture contains an initial concentration of hydrogen peroxide of 0.5–12 wt.%, preferably 2–10 wt.%, and particularly preferably 3–6 wt.% hydrogen peroxide (calculated as 100% H₂O₂), in each case based on the weight of the application mixture.However, it is equally possible to coordinate the agent (M1) according to the invention and the hydrogen peroxide-containing composition (M2) in such a way that the concentrations required in the ready-to-use brightening agent (application mixture) are achieved by mixing ratios other than 1:1, for example by a weight-based mixing ratio of 1:2 or 1:3 or even 2:3.

[0099] According to the invention, preferred weight-related mixing ratios (M1):(M2) are in the range of 1 :0.8 to 1 :2.5, particularly preferably in the range of 1 :1 to 1 :2.

[0100] In the context of the present invention, the term "immediately thereafter" means a period of 1 second to 10 minutes, preferably 10 seconds to 5 minutes, and particularly preferably 15 seconds to 2 minutes. In the ready-to-use mixture of (M1) and (M2) and optionally (M3) (see below), the reaction of the hydrogen peroxide with the contained reaction components begins immediately. This reaction must take place on the keratin fibers, so the reactive, ready-to-use mixture must be applied to the keratin fibers immediately after its preparation.

[0101] According to the invention, the term "room temperature" refers to the temperature in the room in which a person usually applies a hair lightening agent, i.e., usually a bathroom or a hair salon, where the temperature is in the range of 10 - 29 °C.

[0102] Leaving the lightening application mixture in process step iv) in the lightening processes according to the invention or preferred according to the invention can also take place at at least 30 °C, preferably at 30 - 60 °C, particularly preferably at 32 - 50 °C, if the hair is heated, for example, with a heat cap or with a heat lamp.

[0103] The oxidizing agent composition (M2) used in the brightening kits and brightening processes according to the invention and preferred according to the invention contains, based on its weight, 40 - 96 wt.%, preferably 65 - 90 wt.%, particularly preferably 70 - 80 wt.%, water.

[0104] The oxidizing agent preparation (M2) used in the brightening kits and brightening processes according to the invention and preferred according to the invention further contains, based on its weight, 0.5 to 23 wt.%, more preferably 2.5 to 21 wt.%, particularly preferably 4 to 20 wt.%, very preferably 5 to 18 wt.% and extremely preferably 6 to 12 wt.%, hydrogen peroxide.

[0105] To stabilize the hydrogen peroxide, the oxidizing agent preparation (M2) has a pH value in the range of 2.0 to 6.5, preferably 2.5 to 5.5, and particularly preferably 2.8 to 4.5, in each case measured at 20°C. Oxidative brightening processes on keratin fibers usually take place in a neutral to alkaline environment; a slightly acidic pH value also yields acceptable brightening results. Therefore, the pH value of the agent (M1) according to the invention is in the range of 8.0 to 11.5, preferably in the range of 9.0 to 11.0, particularly preferably in the range of 9.5 to 10.7, and most preferably 9.8 to 10.5, in each case measured at a temperature of 20°C.

[0106] The ready-to-use brightening agent obtained by mixing the agent (M1) according to the invention with the oxidizing agent preparation (M2) preferably has a pH value in the range of 6.5 - 11.5, more preferably 8.0 - 11.0, particularly preferably 8.5 - 10.8, extraordinarily preferably 9.0 - 10.6, and even more preferably 9.5 - 10.5, each measured at a temperature of 20 °C.

[0107] If a stronger lightening of the keratin fibers or the lightening of very dark, highly melanin-containing keratin fibers is to be achieved with the oxidative lightening agents according to the invention, at least one further oxidizing agent is required in the application mixture, which is applied to the keratin fibers, in addition to hydrogen peroxide, to break down the melanin.

[0108] These additional oxidizing agents are often referred to as blond boosters. They are oxidizing agents that are solid under normal conditions. They are formulated as an anhydrous oxidative hair treatment (M3) containing at least one oxidizing agent that is solid under normal conditions.

[0109] Consequently, a further object of the present invention is a process for the oxidative lightening of keratin fibers, in particular for the lightening of keratin fibers, comprising the following process steps: i) providing a cosmetic agent (M1) for the oxidative lightening of keratin fibers, in particular human hair, which is in the form of an oil-in-water emulsion and which, based on its weight, contains the following components: a) 45 to 85 wt.%, preferably 50 to 80 wt.%, particularly preferably 55 to 75 wt.%, most preferably 60 to 70 wt.% water, b) at least one nonionic surfactant selected from alkyl mono- and oligoglycosides of formula R 4 O-[G] P , in the R 4c) for an alkyl or alkenyl group with 4 to 22 carbon atoms, G for a sugar group with 5 or 6 carbon atoms, and p for a positive rational number in the range of 1 to 6, in a total amount of 0.5–15 wt.%, preferably 1.0–12 wt.%, particularly preferably 1.2–6.0 wt.%, and extraordinarily preferably 1.3–4.0 wt.%; c) at least one linear 1-alkanol with 8 to 40 carbon atoms in a total amount of 5–15 wt.%, preferably 7–13 wt.%, and particularly preferably 9–11 wt.%; d) at least one compound selected from glycerol mono- and diesters of linear or branched, saturated or unsaturated C12-Cso carboxylic acids, which may be hydroxylated, in a total amount of 1–10 wt.%, preferably 2–7 wt.%. wt.%, particularly preferably 3 - 5 wt.% e) at least one glucose-based surfactant different from the surfactants b) in a total amount of 0.5 - 10.0 wt.%, preferably 1.0 - 8.0 wt.%-%, particularly preferably 1.5–6.0 wt.%, extraordinarily preferably 1.8–5.0 wt.%, f) at least one alkalizing agent, g) zero to less than 0.1 wt.% of peroxide compounds, h) no oxidation dye precursors, wherein the composition has a pH value in the range of 8.0 to 11.5, preferably in the range of 9.0 to 11.0, particularly preferably in the range of 9.5 to 10.7, extraordinarily preferably 9.8 to 10.5, in each case measured at a temperature of 20 °C, and ii) providing an oxidizing agent preparation (M2) containing 40–96 wt.%, preferably 65–90 wt.%, particularly preferably 70–80 wt.%, water, furthermore hydrogen peroxide in a total amount of 0.5 to 23 wt.%, more preferably 2.5 to 21 wt.%, particularly preferably 4 to 20 wt.% wt.%, most preferably 5 to 18 wt.% and most preferably 6 to 12 wt.%.-%, and having a pH value in the range of 2.0 to 6.5, preferably 2.5 to 5.5, particularly preferably 2.8 to 4.5, each measured at 20°C, wherein the wt.% values ​​refer to the weight of the oxidizing agent preparation (M2), optionally containing at least one surfactant and / or an oil, and iii) providing an oxidizing agent preparation (M3) different from (M2), comprising i) at least one oxidizing agent selected from the inorganic salts of a peroxosulfuric acid, as well as mixtures of these salts, and j) and 0 to 10 wt.%, preferably 0.1 to 8 wt.%, particularly preferably 0.5 to 5 wt.% water, wherein the wt.-% values ​​refer to the weight of the oxidizing agent preparation (M3), k) wherein (M3) optionally contains at least one oil and / or at least one surfactant, iv) mixing the cosmetic agent (M1) with the oxidizing agent preparations (M2) and (M3), wherein it is preferred that the aforementioned components (M1), (M2) and (M3) are composed with respect to the weight ratio (M1):(M2):(M3) of the three components such that the weight ratio (M1):(M2) is in the range of 1 :0.8 to 1 :2.5, preferably 1 :1 to 1 :2, and (M3) is present in an amount of 5 - 25 wt.%, preferably 7 - 20 wt.%, particularly preferably 7.5 - 17 wt.%.-%, based on the weight of the total mixture of (M1), (M2) and (M3), is contained, immediately afterwards v) applying the mixture obtained in step iv) to the hair and leaving this mixture on the hair for a time of 1 to 60 minutes, preferably 20 to 45 minutes, at room temperature and / or at 30 - 60°C, preferably at 32 - 50°C, vi) rinsing the hair with water and / or a cleansing composition, and vii) optionally applying a post-treatment agent to the hair and optionally rinsing, followed by drying.

[0110] Preferably, the at least one oxidizing agent is selected from the inorganic salts of a peroxosulfuric acid, mixtures of these salts, sodium percarbonate, sodium percarbamide, sodium perborate, and mixtures of at least one salt of a peroxosulfuric acid and an oxidizing agent selected from sodium percarbonate, sodium percarbamide, sodium perborate, and mixtures thereof.

[0111] Peroxosulfuric acids include peroxodisulfuric acid and peroxomonosulfuric acid (Caro's acid).

[0112] According to the invention, the at least one inorganic salt of peroxosulfuric acid is preferably selected from ammonium peroxodisulfate, ammonium peroxomonosulfate, alkali metal peroxodisulfates, alkali metal peroxomonosulfates, and alkali metal hydrogen peroxomonosulfates. Potassium peroxodisulfate, sodium peroxodisulfate, ammonium peroxodisulfate, and potassium hydrogen peroxomonosulfate, as well as mixtures thereof, are particularly preferred. Furthermore, in the work carried out on the present invention, it has proven particularly preferred if the anhydrous oxidative hair treatment agent (M3) according to the invention contains at least two different peroxodisulfates. Preferred peroxodisulfate salts are potassium peroxodisulfate-ammonium peroxodisulfate mixtures, potassium peroxodisulfate-ammonium peroxodisulfate-sodium peroxodisulfate mixtures, and potassium peroxodisulfate-sodium peroxodisulfate mixtures.Particularly preferred are mixtures of potassium peroxodisulfate and ammonium peroxodisulfate; mixtures of potassium peroxodisulfate and ammonium peroxodisulfate with an excess of potassium peroxodisulfate, free of sodium peroxodisulfate, are extremely preferred. Particularly preferred mixtures of potassium peroxodisulfate (KPS) and ammonium peroxodisulfate (APS) free of sodium peroxodisulfate according to the invention are those with a weight ratio of KPS / APS in the range of 4:1 to 2:1, preferably 3.5:1 to 2.5:1, and particularly preferably 3.2:1 to 2.8:1.

[0113] Preferably, anhydrous oxidative hair treatment agents (M3) used according to the invention contain at least one oxidizing agent selected from inorganic salts of peroxosulfuric acid and mixtures thereof, in a total amount of 5 - 85 wt.%, preferably 10 - 70 wt.%, particularly preferably 17 - 55 wt.%, and most preferably 22 - 45 wt.%, in each case based on the weight of the oxidative hair treatment agent (M3).

[0114] The oxidative hair treatment agents (M3) used according to the invention are anhydrous, which, for the purposes of the present invention, means that they contain, based on their weight, 0 to 12 wt.%, preferably 0.1 to 10 wt.%, and particularly preferably 0.5 to 9 wt.% water. These figures refer to the free water content. The water of crystallization that individual powder components may contain is not taken into account. The water content can be determined, for example, by Karl Fischer titration in accordance with ISO 4317 (version 2011-12).

[0115] Alkalizing agent

[0116] For the melanin-degrading effect of the hydrogen peroxide and the bleaching effect on the keratinous fiber, it is advantageous if the application mixture of agent (M1), hydrogen peroxide solution (M2) and persalt-containing oxidative hair treatment agent (M3) has a pH value in the range of 6.5 - 11.5, more preferably 8.0 - 11.0, particularly preferably 8.5 - 10.8, extraordinarily preferably 9.0 - 10.6, more extraordinarily preferably 9.5 - 10.5, in each case measured at a temperature of 20 °C.

[0117] To adjust the ready-to-use mixture of (M1), (M2) and (M3) to an alkaline pH, the oxidative hair treatment agents (M3) used according to the invention may, in addition to the at least one persalt that is solid under normal conditions, contain at least one alkalizing agent that is solid under normal conditions in such a total amount that the ready-to-use mixture of (M1), (M2) and (M3) has the desired alkaline pH.

[0118] Oxidative hair treatment products (M3) used preferably according to the invention are therefore characterized in that they contain at least one inorganic alkalizing agent that is solid at 20 °C and 1013 mbar. Particularly preferred oxidative hair treatment products (M3) used according to the invention contain at least one inorganic alkalizing agent that is solid at 20 °C and 1013 mbar in a total amount of 4–70 wt.%, preferably 10–65 wt.%, particularly preferably 15–60 wt.%, and most preferably 20–55 wt.%, in each case based on the weight of the oxidative hair treatment product (M3).

[0119] Further oxidative hair treatment agents (M3) preferably used according to the invention contain at least one inorganic alkalizing agent, solid at 20 °C and 1013 mbar, including in a total amount of 0.1 to 50 wt.%, preferably 4 to 30 wt.%, particularly preferably 15 - 25 wt.%, in each case based on the weight of the oxidative hair treatment agent, at least one sodium silicate or sodium metasilicate with a molar SiO2 / Na2O ratio of > 2, preferably 2.5-3.5.

[0120] In addition to the at least one sodium silicate or sodium metasilicate with a molar SiO2 / Na2O ratio of > 2, preferably 2.5-3.5, in a total amount of 0.1-50 wt.%, preferably 4-30 wt.%, particularly preferably 15-25 wt.%, each based on the weight of the oxidative hair treatment agent (M3), as an optional alkalizing agent, further inorganic alkalizing agents, particularly preferred according to the invention, which are solid at 20 °C and 1013 mbar, are selected from alkaline earth metal silicates, alkaline earth metal hydroxide carbonates, alkaline earth metal carbonates, alkaline earth metal metasilicates, alkali metal hydroxides, alkaline earth metal hydroxides, (earth)alkali metal phosphates and (earth)alkali metal hydrogen phosphates, as well as mixtures of these substances.According to the invention, particularly preferred inorganic alkalizing agents, solid at 20°C and 1013 mbar, are, in addition to the at least one obligatory sodium silicate or sodium metasilicate, each with a molar SiO2 / Na2O ratio of > 2, preferably 2.5 to 3.5, selected from magnesium hydroxide carbonates and mixtures of these alkalizing agents. According to the invention, preferred magnesium hydroxide carbonates are those with the formula MgCCh₂ ■ Mg(OH)₂ ■ 2 H₂O and those with the formula MgCCh₂ ■ Mg(OH)₂. Magnesium hydroxide carbonate with the formula MgCCh₂ ■ Mg(OH)₂ is particularly preferred according to the invention.

[0121] According to the invention, the oxidative hair treatment agents (M3) used particularly preferably contain, based on their total weight, 0.1 to 50 wt.%, preferably 4 to 30 wt.%, particularly preferably 15 to 25 wt.%, sodium silicates with a molar SiO2 / Na2O ratio of > 2, preferably of 2.5 to 3.5, and 2 to 40 wt.%, preferably 5 to 35 wt.%, particularly preferably 10 to 32 wt.% magnesium hydroxide carbonate as inorganic alkalizing agents, solid at 20 °C and 1013 mbar.

[0122] Surprisingly, it was further found that an application mixture with a further optimized brightening performance is obtained when the agent (M1) according to the invention or preferred according to the invention is mixed with an oxidizing agent preparation (M2) containing at least one cationic surfactant, preferably in a total amount of 0.05 - 3 wt.%, particularly preferably of 0.1 - 1.5 wt.%, and most preferably of 0.5 - 0.9 wt.%, in each case based on the weight of the oxidizing agent preparation (M2).

[0123] In a further preferred embodiment of the invention, the oxidizing agent preparation (M2) used according to the invention contains at least one cation surfactant, preferably in a total amount of 0.05 - 3 wt.%, particularly preferably of 0.1 - 1.5 wt.%, and most preferably of 0.5 - 0.9 wt.%, in each case based on the weight of the oxidizing agent preparation (M2).

[0124] Cationic surfactants are surfactants, i.e., surface-active compounds, with one or more positive charges. Cationic surfactants contain exclusively positive charges. These surfactants typically consist of a hydrophobic part and a hydrophilic head group. The hydrophobic part usually comprises a hydrocarbon backbone (e.g., consisting of one or two linear or branched alkyl groups), and the positive charge(s) are located in the hydrophilic head group. Cationic surfactants adsorb onto interfaces and, in aqueous solution above the critical micelle concentration, aggregate to form positively charged micelles.

[0125] According to the invention, cationic surfactants of the type of alkylamidoamines, quaternary ammonium compounds and esterquats are preferred.

[0126] Alkylamidoamines have the general structural formula R 1 -CO-NH-(CH2)n-NR 2 R3 on, where R 1 represents a long-chain, mostly linear alkyl group derived from natural or synthetic fatty acids, preferably a linear C13-C23 alkyl group, which is saturated or unsaturated. The index n is preferably a number from 2 to 5, more preferably 3 or 4. The R groups 2 and R 3 preferably represent a methyl, ethyl or n-propyl group independently of one another, R is particularly preferred 2 and R 3Each contains a methyl group. Alkylamidoamines are typically produced by the amidation of natural or synthetic fatty acids and fatty acid fractions with short-chain dialkylaminoamines. In acidic media, the alkylamidoamines exist permanently protonated, i.e., cationically. According to the invention, particularly preferred compounds from this group of substances are stearamidopropyldimethylamine, behenamidopropyldimethylamine, and palmitamidopropyldimethylamine, as well as mixtures thereof, especially mixtures of stearamidopropyldimethylamine and behenamidopropyldimethylamine.

[0127] Preferred quaternary ammonium compounds are ammonium halides, such as alkyltrimethylammonium chlorides, dialkyldimethylammonium chlorides, trialkylmethylammonium chlorides, and the imidazolium compounds known under the INCI names Quaternium-27 and Quaternium-83. Further preferred quaternary ammonium compounds are tetraalkylammonium salts, such as, in particular, Quaternium-52, known under the INCI name, a poly(oxy-1,2-ethanediyl), ((octadecylnitrilio)tri-2,1-ethanediyl)tris(hydroxy)phosphate (1:1) salt having the general structural formula (III), wherein x + y + z = 10.

[0128] The long alkyl groups of the surfactants mentioned above preferably have 10 to 22, and particularly preferably 12 to 18, carbon atoms. Behenyltrimethylammonium chloride, stearyltrimethylammonium chloride, and cetyltrimethylammonium chloride are particularly preferred, with stearyltrimethylammonium chloride being exceptionally preferred. Other suitable cationic surfactants according to the invention are quaternized protein hydrolysates. Esterquats are substances that contain at least one ester group and at least one quaternary ammonium group as a structural element. Preferred esterquats are quaternized ester salts of fatty acids with triethanolamine, quaternized ester salts of fatty acids with diethanolalkylamines, and quaternized ester salts of fatty acids with 1,2-dihydroxypropyldialkylamines. Such products are marketed under the trademarks Stepantex, Dehyquart, and Armocare.

[0129] With regard to optimal application properties and optimal color results, C10-C22 alkyltrimethylammonium chlorides have proven to be particularly suitable. Particularly preferred oxidizing agent preparations (M2) used according to the invention are therefore characterized in that they contain at least one cationic surfactant in a total amount of 0.05–3 wt.%, particularly preferably 0.1–1.5 wt.%, and most preferably 0.3–0.9 wt.%, in each case based on the weight of the oxidizing agent preparation (M2), wherein preferably at least one surfactant selected from C10-C22 alkyltrimethylammonium chlorides, in particular selected from behenyltrimethylammonium chloride, stearyltrimethylammonium chloride, and cetyltrimethylammonium chloride, as well as mixtures of these surfactants, is included. Most preferred oxidizing agent preparations (M2) used according to the invention contain stearyltrimethylammonium chloride in a total amount of 0.05–3 wt.%.-%, particularly preferably 0.1 - 1.5 wt.%, extraordinarily preferably 0.3 - 0.9 wt.%, in each case based on the weight of the oxidizing agent preparation (M2).

[0130] Another packaging unit (kit-of-parts) preferred according to the invention is characterized in that the oxidizing agent preparation (M2) contains at least one cationic surfactant, preferably in a total amount of 0.05 - 3 wt.%, particularly preferably of 0.1 - 1.5 wt.%, and extraordinarily preferably of 0.5 - 0.9 wt.%, in each case based on the weight of the oxidizing agent preparation (M2).

[0131] Another packaging unit (kit-of-parts) preferred according to the invention is characterized in that the oxidizing agent preparation (M2) contains at least one cationic surfactant, preferably selected from at least one alkylamidoamine, in a total amount of 0.05 - 3 wt.%, particularly preferably 0.1 - 1.5 wt.%, and most preferably 0.5 - 0.9 wt.%, in each case based on the weight of the oxidizing agent preparation (M2).

[0132] A preferred method according to the invention for oxidative hair lightening is characterized in that the oxidizing agent preparation (M2) contains at least one cationic surfactant, preferably in a total amount of 0.05 - 3 wt.%, particularly preferably of 0.1 - 1.5 wt.%, and extraordinarily preferably of 0.5 - 0.9 wt.%, in each case based on the weight of the oxidizing agent preparation (M2).

[0133] Another preferred method according to the invention for the oxidative brightening of keratinous fibers is characterized in that the oxidizing agent preparation (M2) contains at least one cationic surfactant, preferably selected from at least one alkylamidoamine, in a total amount of 0.05 - 3 wt.%, particularly preferably 0.1 - 1.5 wt.%, and most preferably 0.5 - 0.9 wt.%, in each case based on the weight of the oxidizing agent preparation (M2).

[0134] Surprisingly, it was further found that an application mixture with even better lightening performance is obtained when the agent (M1) according to the invention, or a preferred agent according to the invention, is mixed with an oxidizing agent preparation (M2) containing xanthan gum, preferably 1 to 5 wt.%, particularly preferably 1.5 to 4 wt.%, and most preferably 2 to 3 wt.% xanthan gum, in each case based on the weight of the oxidizing agent preparation (M2). Xanthan gum improves scalp tolerance. Furthermore, the consistency of the application mixture achieved with xanthan gum results in optimal application properties, for example, for brush application.The application mixtures thus obtained, in particular at weight-related mixing ratios (M1):(M2) in the range of 1 :0.8 to 1 :2.5, especially preferably in the range of 1 :1 to 1 :2, preferably have a viscosity in the range of 3500 - 8000 mPas, preferably 4000 - 7000 mPas, particularly preferably 4500 - 6500 mPas, and most preferably 5000 - 6000 mPas, each measured at 20°C with a rheometer model MVII of the company Haake at a shear rate of 7.2 revolutions per second.

[0135] Preferred oxidizing agent preparations (M2) used according to the invention contain at least one surfactant or emulsifier, but only in minor quantities.

[0136] In a further preferred embodiment of the invention, the oxidizing agent preparations (M2) used according to the invention are characterized in that their surfactant and emulsifier content is zero to a maximum of 3.0 wt.%, preferably 0.5 to 2.0 wt.%, and particularly preferably 1.0 to 1.5 wt.%, in each case based on the weight of the oxidizing agent preparation (M2). Higher surfactant amounts could potentially impair the good scalp compatibility of the products according to the invention in the ready-to-use product.

[0137] The components c) and d) which are mandatory for (M1) are not considered surfactants and emulsifiers within the meaning of the present invention.

[0138] Preferred surfactants and emulsifiers in (M2) are selected from anionic, cationic, zwitterionic, amphoteric and non-ionic surfactants and emulsifiers, as well as mixtures thereof.

[0139] Further oxidizing agent preparations (M2) preferably used according to the invention contain at least one zwitterionic and / or at least one amphoteric surfactant and / or at least one anionic surfactant.

[0140] Zwitterionic surfactants are surface-active compounds that contain at least one quaternary ammonium group and at least one carboxylate, sulfonate, or sulfate group in their molecule. Particularly suitable zwitterionic surfactants include the so-called betaines, such as N-alkyl-N,N-dimethylammonium glycinates (e.g., cocoalkyl-dimethylammonium glycinate), N-acyl-aminopropyl-N,N-dimethylammonium glycinates (e.g., cocoacylaminopropyl-dimethylammonium glycinate), and 2-alkyl-3-carboxymethyl-3-hydroxyethyl imidazolines, each with 8 to 18 carbon atoms in the alkyl or acyl group, as well as cocoacylaminoethylhydroxyethylcarboxymethyl glycinate. A preferred zwitterionic surfactant is the fatty acid amide derivative known under the INCI name cocamidopropyl betaine.

[0141] Amphoteric surfactants are defined as surface-active compounds that, in addition to a Cs-C24 alkyl or acyl group in the molecule, contain at least one free amino group and at least one -COOH or -SOsH group and are capable of forming internal salts. Examples of suitable amphoteric surfactants include 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 with approximately 8 to 24 carbon atoms in the alkyl group. Particularly preferred amphoteric surfactants are N-cocosalkylaminopropionate, cocosacylaminoethylaminopropionate, and Ci2-Ci8-acylsarcosine.

[0142] Suitable anionic surfactants include all anionic surfactants suitable for use on the human body, which possess a water-soluble anionic group, for example a carboxylate, sulfate, sulfonate, or phosphate group, and a lipophilic alkyl group with approximately 8 to 30 carbon atoms, preferably 8 to 24 carbon atoms, in the molecule. Additionally, the molecule may contain glycol or polyglycol ether groups, ester, ether, and amide groups, as well as hydroxyl groups. Examples of suitable anionic surfactants are, in the form of sodium, potassium, and ammonium salts, as well as mono-, di-, and trialkanolammonium salts with 2 to 4 carbon atoms in the alkanol group; linear and branched fatty acids with 8 to 30 carbon atoms (soaps); polyethoxylated ether carboxylic acids; acyl sarcosides; acyl taurides; acyl isethionates; mono- and dialkyl sulfosuccinic acid esters and monoalkyl polyoxyethyl sulfosuccinic acid esters with 1 to 6 ethylene oxide groups; and linear alkanesulfonates.linear alpha-olefin sulfonates, sulfonates of unsaturated fatty acids with up to 6 double bonds, alpha-sulfofaticial methyl esters of fatty acids, C8-C2o alkyl sulfates and C8-C2o alkyl ether sulfates with up to 15 oxyethyl groups, mixtures of surfactant hydroxysulfonates, sulfated hydroxyalkyl polyethylene and / or hydroxyalkylene propylene glycol ethers, esters of tartaric acid or citric acid with ethoxylated or propoxylated fatty alcohols, optionally polyethoxylated alkyl and / or alkenyl ether phosphates, sulfated fatty acid alkylene glycol esters, as well as monoglyceride sulfates and monoglyceride ether sulfates. Preferred anionic surfactants are soaps, C8-C2o alkyl sulfates, C8-C2o alkyl ether sulfates, and C8-C2o ether carboxylic acids with 8 to 20 carbon atoms in the alkyl group and up to 12 ethylene oxide groups in the molecule. Sodium cetearyl sulfate is particularly preferred.

[0143] Surprisingly, it was found that an application mixture with a viscosity suitable for application and drip-free retention on the hair is obtained by mixing the agent (M1) according to the invention or a preferred agent according to the invention with an oxidizing agent preparation (M2) containing at least one oil, preferably at least one oil in a total amount of 0.5–40 wt.%, more preferably 1–25 wt.%, particularly preferably 3–20 wt.%, and most preferably 5–17 wt.%, in each case based on the weight of the oxidizing agent preparation (M2). The resulting consistency of the application mixture leads to optimal application properties, for example, for brush application.The application mixtures thus obtained, in particular at weight-related mixing ratios (M1):(M2) in the range of 1 :0.8 to 1 :2.5, especially preferably in the range of 1 :1 to 1 :2, preferably have a viscosity in the range of 3500 - 8000 mPas, preferably 4000 - 7000 mPas, particularly preferably 4500 - 6500 mPas, and most preferably 5000 - 6000 mPas, each measured at 20°C with a rheometer model MVII of the company Haake at a shear rate of 7.2 revolutions per second.

[0144] Further oxidizing agent preparations (M2) preferably used according to the invention contain at least one oil. According to the invention, the at least one oil is preferably selected from mineral oils, branched fatty alcohols with 8 to 24 carbon atoms, dialkyl ethers with 6 to 18 carbon atoms in the alkyl groups, esters of linear or branched saturated or unsaturated fatty alcohols with 2 to 30 carbon atoms with linear or branched saturated or unsaturated fatty acids with 2 to 30 carbon atoms, which may be hydroxylated, as well as mixtures of the aforementioned substances. Mineral oil is particularly preferred.

[0145] According to the invention, preferred kits, uses and methods are characterized in that the composition (M2) used for their manufacture contains at least one oil in a total amount of 0.5 - 40 wt.%, preferably 1 - 25 wt.%, particularly preferably 3 - 20 wt.%, and extraordinarily preferably 5 - 17 wt.%.

[0146] Further kits, uses and methods preferred according to the invention are characterized in that the composition (M2) used for their manufacture contains - based on its weight - 0.5- 40 wt.%, preferably 1- 25 wt.%, particularly preferably 3- 20 wt.%, extraordinarily preferably 5- 17 wt.%, mineral oil.

[0147] Further kits, uses and methods preferred according to the invention are characterized in that the composition (M2) used for their manufacture contains - based on its weight - 0.5- 40 wt.%, preferably 1- 25 wt.%, particularly preferably 3- 20 wt.%, extraordinarily preferably 5- 17 wt.%, isopropyl myristate.

[0148] The following examples are intended to illustrate the subject matter of the invention without limiting it.

[0149] Examples

[0150] The following brightening agents (M1) were prepared (oil-in-water emulsions, all amounts in wt.%), which constitute the alkalizing component (M1) of a two-part or three-part oxidative brightening agent. The brightening agents (M1-1 E) and (M1-2 E) are according to the invention; (M1-V) is a comparative example.

[0151] Table 1: Brightening agents (M1) (oil-in-water emulsions, all amounts in wt.%)

[0152] All alkalizing components had a pH value of 10.1, measured at 20°C.

[0153] The following oxidation compositions (M2) were prepared (all amounts in wt.%):

[0154] Table 2: Developer emulsion (M2-1) (12 wt% H2O2)

[0155] Table 3: Developer emulsion (M2-2) (9 wt% H2O2) Table 4: Developer emulsion (M2-3) (12 wt% H2O2)

[0156] Table 5: Developer emulsion (M2-4) (12 wt% H2O2)

[0157] Table 6: Developer emulsion (M2-5) (9 wt% H2O2) Table 7: Developer emulsion (M2-6) (11.5 wt% H2O2)

[0158] Brightening

[0159] To produce ready-to-use oxidative bleaching agents, the agent (M1-1) according to the invention was mixed in a weight ratio of 1 :1 with one of the oxidizing agent preparations (M2-1), (M2-2), (M2-3), (M2-4), (M2-5) or (M2-6).

[0160] The oxidative bleaching agents prepared in this way were applied in a defined quantity (4 g of oxidative bleaching agent per 1 g of hair) to dry strands of hair shade 6-0 (light brown, Fischbach & Miller) (12 strands per oxidative bleaching agent) and left on the hair strands for a processing time of 45 minutes at 38 °C. The remaining agents were then rinsed out of the hair strands with lukewarm water for 2 minutes, the strands were first towel-dried, and then blow-dried.

[0161] When the aforementioned bleaching agents according to the invention were applied to the scalp hair of test subjects, the agents could be easily and homogeneously prepared by mixing components (M1) and (M2) by hand, then effortlessly applied to the hair to be lightened, and remained there for the 45-minute processing time without dripping. Intense and homogeneous lightening was achieved along the entire length of the keratin fibers.

[0162] Table 8: Bleaching powder (all quantities in wt.%)

[0163] For test series 1,

[0164] 1) the alkalizing components (M1-1 E) and (M1-2E) according to the invention, each with the developer emulsion (M2-6) and the bleaching powder BP-1 in a weight ratio of 60:60:10 to form a ready-to-use bleaching agent according to the invention and

[0165] 2) the comparative alkalizing component (M1-V) is mixed with the developer emulsion (M2-6) and the bleaching powder BP-1 in a weight ratio of 60:60:10 to form a ready-to-use comparative bleaching agent.

[0166] For test series 2,

[0167] 3) the alkalizing components (M1-1 E) and (M1-2E) according to the invention, each with the developer emulsion (M2-6) and the bleaching powder BP-2 in a weight ratio of 50:50:20 to form a ready-to-use bleaching agent according to the invention and

[0168] 4) The comparative alkalizing component (M1-V) is mixed with the developer emulsion (M2-6) and the bleaching powder BP-2 in a weight ratio of 50:50:20 to form a ready-to-use comparative bleaching agent.

[0169] The respective three-component bleaching agent being tested was applied to different sections of the test subject's hair and rinsed with water after a processing time of 45 minutes. The rinsed, bleached hair was examined while wet (feel, wet combability) and then dried. The dry hair was then examined (feel, shine, dry combability). The tested parameters were assessed by a trained panel of experts and evaluated on a scale of 1 to 5 (1 being very poor; 5 being very good).

[0170] The results are shown in the following tables.

[0171] Table 9: Results of test series 1

[0172] Table 10: Results of test series 2 (2 test subjects) Note: not determined

[0173] With the brightening agents according to the invention, a higher level of lift could be achieved than with the comparison agent.

Claims

Patent claims:

1. An agent for the oxidative lightening of keratinous fibers, in particular human hair, in the form of an oil-in-water emulsion, comprising, based on its weight, the following components: a) 45 to 85 wt.%, preferably 50 to 80 wt.%, particularly preferably 55 to 75 wt.%, extremely preferably 60 to 70 wt.% water; b) at least one nonionic surfactant selected from alkyl mono- and oligoglycosides of formula R 4 O-[G] P , in the R 4c) for an alkyl or alkenyl group with 4 to 22 carbon atoms, G for a sugar group with 5 or 6 carbon atoms, and p for a positive rational number in the range of 1 to 6, in a total amount of 0.5–15 wt.%, preferably 1.0–12 wt.%, particularly preferably 1.2–6.0 wt.%, and extraordinarily preferably 1.3–4.0 wt.%; c) at least one linear 1-alkanol with 8 to 40 carbon atoms in a total amount of 5–15 wt.%, preferably 7–13 wt.%, and particularly preferably 9–11 wt.%; d) at least one compound selected from glycerol mono- and diesters of linear or branched, saturated or unsaturated C12-Cso carboxylic acids, which may be hydroxylated, in a total amount of 1–10 wt.%, preferably 2–7 wt.%. wt.%, particularly preferably 3 - 5 wt.%, e) at least one glucose-based surfactant different from the surfactants b) in a total amount of 0.5 - 10.0 wt.%, preferably 1.0 - 8.0 wt.%.-%, particularly preferably 1.5 - 6.0 wt.%, extraordinarily preferably 1.8 - 5.0 wt.%, f) at least one alkalizing agent, g) zero to less than 0.1 wt.% of peroxide compounds, h) no oxidation dye precursors, wherein the composition has a pH value in the range of 8.0 to 11.5, preferably in the range of 9.0 to 11.0, particularly preferably in the range of 9.5 to 10.7, extraordinarily preferably 9.8 to 10.5, in each case measured at a temperature of 20 °C.

2. Composition according to claim 1, characterized in that the glucose-based surfactant e), which is different from the surfactants b), is selected from N-acyl-N-methylglucamides of formula (I) where the acyl group R 5 CO- is derived from a linear or branched, saturated or unsaturated Ca-C22 carboxylic acid, which may be hydroxylated.

3. Composition according to claim 2, characterized in that the at least one N-acyl-N-methylglucamide of formula (I) is selected from N-capryloyl-N-methylglucamide, N-caproyl-N-methylglucamide, N-lauroyl-N-methylglucamide, N-myristoyl-N-methylglucamide, N-palmitoyl-N-methylglucamide, N-stearoyl-N-methylglucamide, N-arachidoyl-N-methylglucamide, N-behenoyl-N-methylglucamide, and from mixtures of these compounds, in particular from mixtures designated as N-cocoyl-N-methylglucamide and N-lauroyl / N-myristoyl-N-methylglucamide mixtures.

4. Composition according to claim 1, characterized in that the glucose-based surfactant e), which is different from the surfactants b), is selected from the salts of C8-C18 alkyl oligoglucoside carboxylates, wherein the degree of oligomerization p' of these compounds is a rational number in the range of 1 to 3, preferably in the range of 1 to 2.

5. Composition according to claim 4, characterized in that the at least one glucose-based surfactant e), selected from the salts of C8-C18 alkyl oligoglucoside carboxylates, is selected from the salts of lauryl glucose carboxylate, caprylyl glucose carboxylate, capryl glucose carboxylate, myristyl glucose carboxylate, cetyl glucose carboxylate, stearyl glucose carboxylate, and from mixtures of these compounds, preferably selected from the salts of lauryl glucose carboxylate, caprylyl glucose carboxylate, capryl glucose carboxylate, myristyl glucose carboxylate, and from mixtures of these compounds, in particular from mixtures designated as cocyl glucose carboxylate.

6. Composition according to any one of claims 1-5, characterized in that the at least one alkyl mono- or oligoglycoside of formula R 4 O-[G] Pselected from caprylyl glucoside, capryl glucoside, lauryl glucoside, n-tetradecyl glucoside, cetyl glucoside, stearyl glucoside, arachidyl glucoside, behenyl glucoside and mixtures of these glucosides, in particular mixtures called cocoglucoside, mixtures of caprylyl glucoside and capryl glucoside and mixtures of caprylyl glucoside, capryl glucoside and cocoglucoside.

7. Composition according to any one of claims 1-6, characterized in that the at least one linear 1-alkanol having 8 to 40 carbon atoms is selected from octan-1-ol, decan-1-ol, dodecan-1-ol, tetradecan-1-ol, hexadecan-1-ol, octadecan-1-ol, eicosan-1-ol, docosan-1-ol, (13E)-docosen-1-ol (brassidyl alcohol), (13Z)-docos-13-en-1-ol (erucyl alcohol) and lanolin alcohol as well as mixtures thereof.

8. Composition according to any one of claims 1-7, characterized in that the at least one glycerol mono- or diester is selected from glycerol monostearate, glycerol distearate, glycerol monooleate, glycerol dioleate, glycerol monocaprinate, glycerol dicaprinate, glycerol dicaprinate, glycerol monolaurate, glycerol dilaurate, glycerol monomyristate, glycerol dimyristate, glycerol monopaimitate, glycerol di- palmitate, glycerol mono-12-hydroxystearate, glycerin di-12-hydroxystearate, glycerol monolanolate, glycerin dilanolate and mixtures of these substances.

9. Composition according to any one of claims 1-8, characterized in that it additionally contains at least one anionic surfactant selected from non-ethoxylated C8-C18 alkyl sulfates in a total amount of 3-10 wt.%, preferably 4-8 wt.%, particularly preferably 5-7 wt.%, based on the weight of the composition.

10. Composition according to any one of claims 1-9, characterized in that it additionally contains at least one non-ionic surfactant selected from ethoxylated Cs-Cso alkanols with 4-100 mol of ethylene oxide per mol, with ethoxylated castor oil with 7-80 mol of ethylene oxide per mol, with ethoxylated sorbitan monoesters of linear saturated and unsaturated Ci2-Cso carboxylic acids, which may be hydroxylated, in particular those of myristic acid, palmitic acid, stearic acid or of mixtures of these fatty acids, as well as mixtures of the aforementioned substances, particularly preferably in a total amount of 0.1-4.0 wt.%, preferably 0.5-2.0 wt.%, particularly preferably 1.0-1.5 wt.%, in each case based on the weight of the composition.

11. Composition according to any one of claims 1-10, characterized in that the alkalizing agent f) is selected from ammonia, ammonium hydroxide, alkanolamines, alkali hydroxides, basic amino acids, alkali metal metasilicates, alkali metal disilicates, alkali phosphates and dialkali monohydrogen phosphates, as well as mixtures of these substances.

12. Use of an agent according to any one of claims 1 to 11 for the oxidative lightening of keratinous fibers, in particular human hair.

13. A process for oxidative lightening, comprising the following process steps: i) Providing a cosmetic agent (M1) for the oxidative lightening of keratinous fibers, in particular human hair, according to any one of claims 1 to 11, which is in the form of an oil-in-water emulsion and which, based on its weight, contains the following components: a) 45 to 85 wt.%, preferably 50 to 80 wt.%, particularly preferably 55 to 75 wt.%, most preferably 60 to 70 wt.% water, b) at least one nonionic surfactant selected from alkyl mono- and oligoglycosidates of formula R 4 O-[G] P , in the R 4for an alkyl or alkenyl group with 4 to 22 carbon atoms, G for a sugar group with 5 or 6 carbon atoms, and p for a positive rational number in the range of 1 to 6, in a total amount of 0.5–15 wt.%, preferably 1.0–12 wt.%, particularly preferably 1.2–6.0 wt.%, and most preferably 1.3–4.0 wt.%. c) at least one linear 1-alkanol having 8 to 40 carbon atoms in a total amount of 5–15 wt.%, preferably 7–13 wt.%, particularly preferably 9–11 wt.%, d) at least one compound selected from glycerol mono- and diesters of linear or branched, saturated or unsaturated C12-Cso carboxylic acids, which may be hydroxylated, in a total amount of 1–10 wt.%, preferably 2–7 wt.%, particularly preferably 3–5 wt.%, e) at least one glucose-based surfactant, different from the surfactants in b), in a total amount of 0.5–10.0 wt.%, preferably 1.0–8.0 wt.%, particularly preferably 1.5–6.0 wt.%, extremely preferably 1.8–5.0 wt.%, f) at least one alkalizing agent, g) zero to less than 0.1 wt.-% of peroxide compounds, h) no oxidation dye precursors, wherein the agent has a pH value in the range of 8.0 to 11.5, preferably in the range of 9.0 to 11.0, particularly preferably in the range of 9.5 to 10.7, and extraordinarily preferably 9.8 to 10.5, in each case measured at a temperature of 20 °C, and ii) providing an oxidizing agent preparation (M2) containing 40–96 wt.%, preferably 65–90 wt.%, and extraordinarily preferably 70–80 wt.%, water, furthermore hydrogen peroxide in a total amount of 0.5 to 23 wt.%, more preferably 2.5 to 21 wt.%, particularly preferably 4 to 20 wt.%, most preferably 5 to 18 wt.%, and extraordinarily preferably 6 to 12 wt.%, and a pH value in the range of 2.0 to 6.5, preferably 2.5– 5.5, particularly preferably 2.8 to 4.5, each measured at 20°C, wherein the weights-% values ​​refer to the weight of the oxidizing agent preparation (M2), optionally containing at least one oil and / or at least one surfactant, iii) mixing the cosmetic agent (M1) with the oxidizing agent preparation (M2), preferably in a weight ratio (M1):(M2) in the range of 1:0.8 to 1:2.5, preferably 1:1 to 1:2, immediately followed by iv) applying the mixture obtained in step iii) to the hair and leaving this mixture on the hair for a time of 1 to 60 minutes, preferably 20 to 45 minutes, at room temperature and / or at 30–60°C, preferably at 32–50°C, v) rinsing the hair with water and / or a cleansing composition, and vi) optionally applying a post-treatment agent to the hair and optionally rinsing, followed by drying.

14. A method for the oxidative lightening of keratinous fibers, in particular for the lightening of keratinous fibers, comprising the following process steps: i) providing a cosmetic agent (M1) for the oxidative lightening of keratinous Fibers, in particular human hair, according to any one of claims 1 to 11, which is in the form of an oil-in-water emulsion and which, based on its weight, contains the following components: a) 45 to 85 wt.%, preferably 50 to 80 wt.%, particularly preferably 55 to 75 wt.%, most preferably 60 to 70 wt.% water, b) at least one nonionic surfactant selected from alkyl mono- and oligoglycosidates of formula R 4 O-[G] P , in the R 4a) for an alkyl or alkenyl group with 4 to 22 carbon atoms, G for a sugar group with 5 or 6 carbon atoms, and p for a positive rational number in the range of 1 to 6, in a total amount of 1–10 wt.%, preferably 2–7 wt.%, particularly preferably 3–5 wt.%; c) at least one linear 1-alkanol with 8 to 40 carbon atoms in a total amount of 5–15 wt.%, preferably 7–13 wt.%, particularly preferably 9–11 wt.%; d) at least one compound selected from glycerol mono- and diesters of linear or branched, saturated or unsaturated C12-Cso carboxylic acids, which may be hydroxylated, in a total amount of 1–10 wt.%, preferably 2–7 wt.%, particularly preferably 3–5 wt.%; e) at least one glucose-based Surfactant, which differs from surfactants b), in a total amount of 0.5 - 10.0 wt.%, preferably 1.0 - 8.0 wt.%, particularly preferably 1.5 - 6.0 wt.%, extraordinarily preferably 1.8 - 5.0 wt.%.-%, f) at least one alkalizing agent, g) zero to less than 0.1 wt.% of peroxide compounds, h) no oxidation dye precursors, wherein the agent has a pH value in the range of 8.0 to 11.5, preferably in the range of 9.0 to 11.0, particularly preferably in the range of 9.5 to 10.7, and extraordinarily preferably 9.8 to 10.5, in each case measured at a temperature of 20 °C, ii) providing an oxidizing agent preparation (M2) containing 40–96 wt.%, preferably 65–90 wt.%, and extraordinarily preferably 70–80 wt.% water, furthermore hydrogen peroxide in a total amount of 0.5 to 23 wt.%, more preferably 2.5 to 21 wt.%, particularly preferably 4 to 20 wt.%, most preferably 5 to 18 wt.%, and extraordinarily preferably 6 to 12 wt.%, and a pH value in the range of 2.0 to 6.5, preferably 2.5 to 5.5, particularly preferably 2.8 to 4.5, each measured at 20°C, wherein the weight-% statements refer to the weight of the oxidizing agent preparation (M2), optionally containing at least one oil and / or at least one surfactant, and iii) providing an oxidizing agent preparation (M3) different from (M2), containing i) at least one oxidizing agent selected from the inorganic salts of a. Peroxosulfuric acid, as well as mixtures of these salts, and j) and 0 to 10 wt.%, preferably 0.1 to 8 wt.%, particularly preferably 0.5 to 5 wt.% water, wherein the wt.% values ​​refer to the weight of the oxidizing agent preparation (M3), k) wherein (M3) optionally contains at least one oil and / or at least one surfactant, iv) mixing the cosmetic agent (M1) with the oxidizing agent preparations (M2) and (M3), wherein it is preferred that the aforementioned components (M1), (M2) and (M3) are composed with respect to the weight ratio (M1):(M2):(M3) of the three components such that the weight ratio (M1):(M2) is in the range of 1 :0.8 to 1 :2.5, preferably 1 :1 to 1 :2, and (M3) in an amount of 5 to 25 wt.%, preferably 7 to 20 wt.%, particularly preferably 7.5 to 17 weights-%, based on the weight of the total mixture of (M1), (M2) and (M3), is contained, immediately afterwards v) applying the mixture obtained in step iv) to the hair and leaving this mixture on the hair for a time of 1 to 60 minutes, preferably 20 to 45 minutes, at room temperature and / or at 30 - 60°C, preferably at 32 - 50°C, vi) rinsing the hair with water and / or a cleansing composition, and vii) optionally applying a post-treatment agent to the hair and optionally rinsing, followed by drying.

15. Kit-of-parts, which, packaged separately, comprises: i) at least one container (C1) containing an agent for the oxidative lightening of keratinous fibers, in particular human hair, according to any one of claims 1 to 11, which is in the form of an oil-in-water emulsion and which, based on its weight, contains the following components: a) 45 to 85 wt.%, preferably 50 to 80 wt.%, particularly preferably 55 to 75 wt.%, most preferably 60 to 70 wt.% water, b) at least one nonionic surfactant selected from alkyl mono- and oligoglycosides of formula R 4 O-[G] P , in the R 4c) for an alkyl or alkenyl group with 4 to 22 carbon atoms, G for a sugar group with 5 or 6 carbon atoms, and p for a positive rational number in the range of 1 to 6, in a total amount of 0.5–15 wt.%, preferably 1.0–12 wt.%, particularly preferably 1.2–6.0 wt.%, and extraordinarily preferably 1.3–4.0 wt.%; c) at least one linear 1-alkanol with 8 to 40 carbon atoms in a total amount of 5–15 wt.%, preferably 7–13 wt.%, and particularly preferably 9–11 wt.%; d) at least one compound selected from glycerol mono- and diesters of linear or branched, saturated or unsaturated C12-Cso carboxylic acids, which may be hydroxylated, in a total amount of 1–10 wt.%, preferably 2–7 wt.%. wt.%, particularly preferably 3 - 5 wt.%, e) at least one glucose-based surfactant, different from the surfactants b), in a total amount of 0.5 - 10.0 wt.%, preferably 1.0 - 8.0 wt.%, particularly preferably 1.5 - 6.0 wt.%, extraordinarily preferably 1.8 - 5.0 wt.%, f) at least one alkalizing agent, g) zero to less than 0.1 wt.% of peroxide compounds, h) no oxidation dye precursors, wherein the composition has a pH value in the range of 8.0 to 11.5, preferably in the range of 9.0 to 11.0, particularly preferably in the range of 9.5 to 10.7, extraordinarily preferably 9.8 to 10.5, in each case measured at a temperature of 20 °C. and ii) at least one container (C2) containing an oxidizing agent preparation (M2) comprising 40–96 wt.%, preferably 65–90 wt.%, particularly preferably 70–80 wt.% water, further comprising hydrogen peroxide in a total amount of 0.5–23 wt.%, more preferably 2.5–21 wt.%, particularly preferably 4–20 wt.%, most preferably 5–18 wt.%.-% and most preferably 6 to 12 wt.%, and has a pH value in the range of 2.0 to 6.5, preferably 2.5 to 5.5, particularly preferably 2.8 to 4.5, in each case measured at 20°C, wherein the wt.% values ​​refer to the weight of the oxidizing agent preparation (M2), wherein optionally at least one oil and / or at least one surfactant is included, optionally further comprising a container (C3) comprising an oxidizing agent preparation (M3) containing i) at least one oxidizing agent selected from the inorganic salts of a peroxosulfuric acid, as well as mixtures of these salts, and j) 0 to 10 wt.%, preferably 0.1 to 8 wt.%, particularly preferably 0.5 to 5 wt.% water, wherein the wt.% values ​​refer to the weight of the oxidizing agent preparation (M3), k) wherein (M3) optionally contains at least one oil and / or at least one surfactant.

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