Two-component oxidation dyeing composition

Abstract

The present invention is directed to a two-part oxidation dyeing composition having an alkaline first part containing an oxidation dye coupler and / or oxidation dye precursor, and a second part containing hydrogen peroxide, xanthine and / or its derivatives, and a lipophilic compound. The second part is formulated as a water-in-oil emulsion, and it has been unexpectedly discovered that the xanthine stabilizes the viscosity of the second part composition, allowing for improved dyeing performance.

Description

[Technical field]

[0001] The present invention is directed to a two-part oxidation dyeing composition, a method for oxidation dyeing keratinous fibers, and a kit-of-parts for oxidation dyeing. [Background technology]

[0002] Hydrogen peroxide-containing aqueous compositions are essential components for the effective dyeing of keratin fibers. In particular, the cosmetics industry depends on the performance of these compositions. Typically, hydrogen peroxide compositions are formulated as emulsions.

[0003] However, a common problem with such emulsion compositions is their unsatisfactory storage stability, especially under suboptimal temperature conditions. For example, consumers living in countries close to the equator often cannot ensure correct storage of the composition at room temperature. As a result, users face poor performance in the dyeing process compared to the results obtained with the same composition 2-3 months earlier.

[0004] However, a long shelf life is essential to users of hydrogen peroxide emulsion compositions to maintain their performance.

[0005] The prior art does not adequately address this problem. For example, US Pat. No. 5,399,633 focuses on emulsion stability by selecting certain surfactants and concentration ranges to improve stability.

[0006] Xanthine and its derivatives are well-known ingredients in the pharmaceutical and food industries. Furthermore, cleansing compositions containing caffeine are well-known (e.g., Non-Patent Document 1).

[0007] US Patent No. 5,399,633 discloses an aqueous oxidizing composition containing up to 5% by weight of hydrogen peroxide and a purine derivative, in particular caffeine. The purine derivative has been found to reduce damage to keratin fibres. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] European Patent Application Publication No. 2198923 [Patent Document 2] International Application Publication No. 2009 / 053180 [Non-patent literature]

[0009] [Non-Patent Document 1] Mintel #6713099 Summary of the Invention

[0010] Therefore, a first object of the present invention is to - a dye composition A having a pH in the range from 7 to 12 and comprising one or more oxidation dye precursors and / or oxidation dye couplers, and one or more alkalizing agents; a) hydrogen peroxide, b) the structure:

[0011] [ka]

[0012] wherein R1, R2, and R3 are independently selected from H and CH3, and / or mixtures thereof; c) one or more lipophilic compounds an aqueous oxidizing composition B, which is an oil-in-water emulsion and has a pH in the range of 1 to 6; It is a two-part oxidizing composition comprising:

[0013] A second object of the present invention is a method for oxidative dyeing of keratinous fibers, preferably human keratinous fibers, more preferably human hair, comprising the steps of: i) preparing a two-part composition as defined above and mixing the compositions to provide a ready-to-use composition having a pH in the range of 7 to 12; ii) applying the ready-to-use composition to the keratin fibers and leaving it for a period ranging from 1 to 60 minutes; iii) rinsing the keratinous fibers and optionally washing the keratinous fibers with shampoo; The method includes:

[0014] The third object of the present invention is to provide a two-part composition as defined above, a bleaching powder composition comprising one or more persalts and / or peroxy salts and one or more alkalizing agents, - an aqueous bleaching composition comprising one or more alkalizing agents and having a pH in the range of 7 to 12; and another composition selected from A kit-of-parts comprising:

[0015] Despite attempts by the prior art, they have failed to provide a satisfactory solution for maintaining the performance and storage stability of hydrogen peroxide emulsion compositions, particularly their physical storage stability.

[0016] The inventors of the present invention have unexpectedly found that xanthine derivatives increase the storage stability of hydrogen peroxide compositions at room temperature, at reduced and elevated temperatures.In addition, xanthine derivatives can maintain the viscosity of the composition during storage.This ensures the compatibility of the two-part composition regardless of previous storage history, avoiding handling problems for consumers.In addition, oxidation dyeing processes have been found to be more consistent in performance over time through the principles of the present invention.

[0017] [Oxidation dyeing composition A] The oxidation dye composition A has a pH in the range of 7 to 12 and contains one or more oxidation dye precursors and / or oxidation dye couplers, and one or more alkalizing agents.

[0018] The pH of the oxidation dye composition A is preferably 7.5 or more, more preferably 8.0 or more, and even more preferably 8.5 or more, from the viewpoint of dyeing performance. The pH of the dye composition A is preferably 11 or less, more preferably 10.5 or less, and even more preferably 10.0 or less, from the viewpoints of cosmetic safety and dyeing performance. In order to obtain the above-mentioned effects, the pH of the oxidation dye composition A is preferably in the range of 7.5 to 11, more preferably 8.0 to 10.5, and even more preferably 8.5 to 10.0.

[0019] The oxidation dye composition A comprises one or more oxidation dye precursors and / or oxidation dye couplers.

[0020] Suitable oxidation dye precursors are, for example, p-phenylenediamine and / or its derivatives, p-aminophenol and / or its derivatives, and heterocyclic compounds, such as diaminopyrazoles and substituted pyrimidines, and / or their derivatives.

[0021] Exemplary oxidation dye precursors are p-phenylenediamine, p-aminophenol, 2,5-diamino-toluene, 2-n-propyl or 2-ethyl-p-phenylenediamine, 2,6-di-methyl-p-phenylene-diamine, 2-(2,5-diaminophenyl)ethanol, 1-amino-4-bis-(2'-hydroxy-ethyl)amino-benzene, 2-(2-hydroxyethylamino)-5-aminotoluene, 4,4'-diaminodiphenylamine, 4-aminodiphenylamine, 2-amino-5-N,N-diethylaminotoluene, 4-amino -N-ethyl-N-isopropylaniline, 2-chloro-p-phenylenediamine, 1-β-hydroxyethyl-2,5-diamino-4-chlorobenzene, 1-β-hydroxyethyl-2,5-diamino-4-methylbenzene, 2-methoxy-p-phenylenediamine, N,N-diethyl-p-phenylenediamine, 1-amino-4-β-methoxyethylaminobenzene, 1-dimethyl-amino-4-aminobenzene, 1-hydroxy-2,5-diamino-4-methylbenzene, 1-hydroxymethyl-2,5-diaminobenzene, 1,3-dimethyl- 2,5-diaminobenzene, 1,4-diaminoisopropylbenzene and / or 1-amino-4-β-hydroxypropylaminobenzene, 1-hydroxyethyl-4,5-diaminopyrazole, 3,4-diamino-5-hydroxypyrazole, 3,5-diaminopyrazole, 3,5-diaminopyrazole-1-carboxamide, 3-amino-5-hydroxypyrazole, 1-phenyl-2-methylpyrazole, 1-phenyl-3-methylpyrazole-5-one, 3,5-dimethylpyrazole, 3,5-dimethylpyrazole-1-methanol, 3, 5-Diamino-1,2,4-triazole, 4-aminophenol and its derivatives, such as 4-amino-3-methylphenol, 2-chloro-4-aminophenol, 2,6-dichloro-4-aminophenol, 2,4-diamino-phenol, 2,6-dibromo-4-aminophenol, tetraaminopyrimidine, triaminohydroxypyrimidine, diaminomono- and -dihydroxypyrimidine, aminotriazine, 5-aminosalicylic acid and / or 1,2,4-triaminobenzene, 2,5-diaminopyridine, 2,3-diaminopyridine, 2,6-diaminopyridine, 3-amino-2-methylamino-6-methoxypyridine, 2-dimethyl-5-aminopyridine, 2-dimethylaminoethyl-3-hydroxypyridine, 2-amino-4,6-dimethylpyridine, 2-amino-3-hydroxypyridine, 3-amino-2(β-hydroxyethylamino)-6-methoxypyridine, 2,6-dimethylamino-5-aminopyridine, 2-di(hydroxyethyl)amino-5-aminopyridine, 2-hydroxyethylamino-5-aminopyridine, 4-hydroxy-2,5,6-triaminopyrimidine, and / or water-soluble salts thereof, and / or mixtures thereof.

[0022] Suitable oxidation dye couplers are resorcinol and / or its derivatives, m-aminophenol and / or its derivatives, m-phenylenediamine and / or its derivatives, pyridine and / or its derivatives, and naphthol and / or its derivatives.

[0023] Examples of oxidation dye couplers are 5-amino-2-methylphenol, 2-methyl-5-hydroxyethylaminophenol, 2,4-diaminophenoxyethanol, 2-amino-4-hydroxyethylaminoanisole, 2-methyl-5-amino-6-chlorophenol, 1,3-bis(2,4-diaminophenoxy)propane, 2-bis(2-hydroxyethyl)aminotoluene, 2-amino-5-methylphenol, resorcinol, 2-methyl-resorcinol, 4-chlororesorcinol, 2-amino-4-chlorophenol, 5-amino-4-methoxy-2-methylphenol, 2-aminophenol, 3-amino-phenol, 1-methyl-2-hydroxy-4-aminobenzene, 3-N,N-dimethylaminophenol, 2,6-dihydroxy-3,5-dimethoxypyridine, 5-amino-3-methylphenol. , 6-amino-3-methylphenol, 1,3-diamino-benzene, 1-amino-3-(2'-hydroxyethylamino)benzene, 1-amino-3-[bis(2'-hydroxyethyl)amino]benzene, α-naphthol, 4,6-dichlororesorcinol, 1,3-diamino-toluene, 4-hydroxy-1,2-methylenedioxybenzene, 1,5-dihydroxynaphthalene, 1,6-dihydroxynaphthalene, 1,7-dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 1-hydroxy-2-methylnaphthalene, 4-hydroxy-1,2-methyldioxybenzene, 2,4-diamino-3-chlorophenol, 5-amino-2-methoxyphenol and / or 1-methoxy-2-amino-4-(2'-hydroxyethylamino)-benzene, or water-soluble salts thereof, and mixtures thereof.

[0024] A suitable total concentration of the oxidation dye precursors and / or oxidation dye couplers is in the range of 0.001% to 5% by weight, preferably 0.01% to 4% by weight, more preferably 0.05% to 3% by weight, and even more preferably 0.1% to 2% by weight, calculated relative to the total weight of the oxidation dye composition A.

[0025] The oxidation dyeing composition A comprises one or more alkalizing agents. Preferably, the one or more alkalizing agents are, from the viewpoint of cosmetic safety and dyeing performance, ammonia, a compound having the general structure:

[0026] [ka]

[0027] [In the formula, R4, R5 and R6 are the same or is different and preferably H、 C1-C4 alkyl, C3-C4 unsaturated alkyl, C3-C4 branched alkyl, C1-C4 hydroxyl alkyl, C3-C4 unsaturated hydroxyl alkyl, C3-C4 branched hydroxyl alkyl, with the proviso that at least one of R4, R5, or R6 is different from H.

[0028] From the viewpoint of dyeing strength, the alkalizing agent is preferably selected from ammonia and / or a salt thereof, monoethanolamine and / or a salt thereof, and / or 2-aminomethylpropanol, and / or a mixture thereof.

[0029] The concentration of the alkalizing agent in the oxidation dyeing composition A before mixing is preferably in the range of 0.25% by weight to 15% by weight, more preferably 0.5% by weight to 12.5% ​​by weight, even more preferably 0.75% by weight to 10% by weight, and even more preferably 1% by weight to 7.5% by weight, calculated based on the total weight of the oxidation dyeing composition A before mixing, from the viewpoint of sufficient alkalinity and dyeing strength.

[0030] The oxidation dye composition may be in the form of a thickened gel, an emulsion, or a thickened emulsion.

[0031] To form an emulsion, the oxidation dye composition A may contain c) one or more lipophilic compounds, as described in detail in the aqueous oxidation composition B.

[0032] To form a thickened gel and / or a thickened emulsion, the oxidation dye composition A may further comprise a thickening polymer, as disclosed in the aqueous oxidation composition B.

[0033] Furthermore, from the standpoint of wettability and formulation stability, the oxidation dyeing composition A may further comprise one or more surfactants as compounds d), which are disclosed in the aqueous oxidation composition B.

[0034] [Aqueous Oxidizing Composition B] The aqueous oxidizing composition B has a pH in the range of 1 to 6; a) hydrogen peroxide, b) the structure:

[0035] [ka]

[0036] wherein R1, R2, and R3 are independently selected from H and CH3, and / or mixtures thereof; c) one or more lipophilic compounds and is an oil-in-water emulsion.

[0037] From the viewpoints of storage stability and safety of the composition, the pH is preferably 1.25 or higher, more preferably 1.5 or higher, and even more preferably 2 or higher. The pH of the composition is preferably 5 or less, more preferably 4 or less, and even more preferably 3 or less, from the viewpoint of storage stability of the composition. In order to obtain the above-mentioned effects, the pH of the composition is preferably in the range of 1.25 to 5, more preferably in the range of 1.5 to 4, and even more preferably in the range of 2 to 3.

[0038] The concentration of the compound a) is preferably in the range of more than 1% by weight, more preferably 2% by weight or more, and even more preferably 3% by weight or more, calculated on the total weight of the composition, from the viewpoint of product performance. The concentration of the compound a) is preferably 20% by weight or less, more preferably 15% by weight or less, and even more preferably 12% by weight or less, calculated on the total weight of the composition, from the viewpoints of product performance and user safety. In order to obtain the above-mentioned effects, the concentration of the compound a) is preferably in the range of more than 1 wt % to 20 wt %, more preferably 2 wt % to 15 wt %, and even more preferably 3 wt % to 12 wt %, calculated based on the total weight of the composition.

[0039] Suitable xanthines and / or xanthine derivatives according to compound b) are - xanthines, where R1=R2=R3=H; theobromine, where R1=R3=CH3 and R2=H; theophylline, where R2=R3=CH3 and R1=H, and - Caffeine, where R1=R2=R3=CH3 It is. Mixtures of the above are also suitable.

[0040] From an economical point of view, it is preferred that at least one of the compounds in b) is caffeine.

[0041] From the viewpoint of stabilizing the performance, the total concentration of the compound b) is preferably 0.001% by weight or more, more preferably 0.01% by weight or more, even more preferably 0.02% by weight or more, and even more preferably 0.03% by weight or more, calculated based on the total weight of composition B. For economical reasons as well as from the viewpoint of stabilizing performance, the total concentration of the compounds of b) is preferably 0.5% by weight or less, more preferably 0.25% by weight or less, even more preferably 0.1% by weight or less, and even more preferably 0.08% by weight or less, calculated based on the total weight of composition B. In order to obtain the above-mentioned effects, the total concentration of the compound b) is preferably in the range of 0.001% by weight to 0.5% by weight, more preferably 0.01% by weight to 0.25% by weight, even more preferably 0.02% by weight to 0.1% by weight, and even more preferably 0.03% by weight to 0.08% by weight, calculated based on the total weight of composition B.

[0042] The aqueous oxidizing composition B is an oil-in-water emulsion and comprises as compound c) one or more lipophilic compounds.

[0043] Preferably, the compound c) is C 12 ~C 22 Fatty alcohols, C3-C 22 Alcohol and C 12 ~C 22 Esters with fatty acids, C8~C 22 The additives are selected from fatty acids, vegetable oils, and / or silicones, and hydrocarbon-based products, and / or mixtures thereof.

[0044] Appropriate C 12 ~C 22 The fatty alcohols are myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, and cetearyl alcohol. Appropriate C3~C 22 Alcohol and C 12 ~C 22 The esters with fatty acids are isopropyl myristate, isopropyl palmitate, and myristyl myristate. Suitable for C8~C 22 The fatty acids are oleic acid, linoleic acid, and palmitic acid. Suitable vegetable oils are olive oil, almond oil, sunflower oil and argan oil. Suitable silicones are non-aminated and aminated silicones, the latter commonly known as amodimethicones. Suitable hydrocarbon-based products are mineral oil, paraffin, and petrolatum.

[0045] The total concentration of the compound c) is preferably 1% by weight or more, more preferably 2% by weight or more, and even more preferably 3% by weight or more, calculated based on the total weight of the composition, from the viewpoints of forming a stable composition and safety for users. The total concentration of the compounds c) is preferably 20% by weight or less, more preferably 15% by weight or less, and even more preferably 12% by weight or less, calculated based on the total weight of the composition, from the viewpoint of forming a stable composition. In order to obtain the above-mentioned effects, the total concentration of the compound c) is in the range of 1% by weight to 20% by weight, preferably 2% by weight to 15% by weight, and more preferably 3% by weight to 12% by weight, calculated based on the total weight of the composition.

[0046] [Surfactant as compound d)] The oxidation dye composition A and / or the aqueous oxidation composition B of the invention may further comprise, as compound d), one or more surfactants, preferably selected from nonionic surfactants, anionic surfactants, cationic surfactants and / or amphoteric / zwitterionic surfactants, and / or mixtures thereof, more preferably selected from anionic surfactants and / or nonionic surfactants, with a view to stabilizing the composition and improving wetting and mixability.

[0047] Preferably, the anionic surfactant may be selected from ethoxylated or non-ethoxylated alkyl ether sulfate surfactants, alkyl sulfates, ethoxylated and / or non-ethoxylated alkyl carboxylates, ethoxylated or non-ethoxylated amino acid surfactants, and / or mixtures thereof.

[0048] A good example is C. 10 ~C 22 Preferably the surfactant is an alkyl sulfate, or preferably an ethoxylated alkyl ether sulfate surfactant, having an alkyl chain length of

[0049] Suitable nonionic surfactants may be selected from alkyl glycosides, alkyl polyglycosides, ethoxylated triglycerides, ethoxylated fatty alcohols, ethoxylated fatty acid esters, and / or mixtures thereof.

[0050] Suitable cationic surfactants include C12 ~C 22 or a quaternary ammonium surfactant having a carbon chain length in the range of 12 ~C 22 and alkyl amine surfactants, such as alkyl amido alkyl amine surfactants, having at least one alkyl chain with a carbon chain length in the range of 0.1 to 1.0. A suitable example is cetrimonium chloride.

[0051] Suitable amphoteric / zwitterionic surfactants are of the betaine type. Suitable compounds may be selected from alkyl betaines and / or alkyl amido betaines. A preferred compound selected from alkyl betaines is lauryl betaine. A preferred compound selected from alkyl amido betaines is cocamidopropyl betaine. The present disclosure also relates to salts of the compounds.

[0052] The suitable concentration range of the surfactant, from the viewpoint of improving the wetting of the keratin fibers and the mixability with other compositions, in particular with the oxidation dye composition A, is in the range of 0.1% by weight to 10% by weight, calculated relative to the total weight of each of the compositions A and / or B.

[0053] [Viscosity of aqueous oxidizing composition B] The viscosity of Aqueous Oxidizing Composition B can be adjusted with the emulsion components to achieve a cosmetically safe viscosity.

[0054] From the viewpoint of cosmetic safety and mixability, it is preferred that the aqueous oxidizing composition B of the composition of the present invention has a viscosity in the range of 1,000 mPa·s to 25,000 mPa·s, preferably in the range of 2,000 mPa·s to 20,000 mPa·s, more preferably in the range of 2,500 mPa·s to 17,500 mPa·s, as determined by a cone and plate viscometer at 25° C. under atmospheric conditions. A suitable viscometer is a Brookfield viscometer with spindle #4.

[0055] [Thickening polymer] If further viscosity adjustment is required, the oxidation dye composition A and / or the aqueous oxidation composition B may comprise one or more thickening polymers, from the viewpoint of cosmetic safety.

[0056] The composition of the present invention comprises one or more thickening polymers selected from nonionic and / or anionic thickening polymers, and / or mixtures thereof.

[0057] Preferably, the thickening polymer is selected from polymers which result in an aqueous solution and / or dispersion at pH 1-6 having a viscosity of at least 1,000 mPa·s, measured at a polymer concentration of 1 wt. % in water at 25° C., calculated relative to the total weight of the composition, and determined by a Brookfield viscometer, e.g., at 25° C. using a suitable spindle at 10 rpm for 1 minute.

[0058] Suitable nonionic thickening polymers are cellulose-based polymers. Suitable examples of cellulose-based polymers are methylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxyethyl-methylcellulose, and alkylated hydroxylcelluloses, such as (C2-C8)-alkylcelluloses or cetyl hydroxyethylcellulose.

[0059] Suitable anionic thickening polymers are selected from natural based anionic polymers and / or synthetic anionic polymers.

[0060] Suitable natural anionic polymers may be selected from xanthan gum, dehydroxanthan gum, hydroxypropyl xanthan gum, carboxymethylcellulose, and starch-based polymers such as vegetable starches and / or their synthetically processed derivatives, such as hydroxypropyl starch phosphate. Equally suitable are alginic acid, sodium alginate, ammonium alginate, calcium alginate, gum arabic, and guar gum.

[0061] Preferred thickening polymers for the composition of the present invention are natural anionic polymers, more preferably xanthan gum and / or dehydroxanthan gum, in view of their biodegradability and low environmental impact.

[0062] Preferably, the total concentration of the thickening polymers of the present invention is at least 0.1% by weight, more preferably at least 0.25% by weight, and even more preferably at least 0.5% by weight, calculated relative to the total weight of the composition, in order to provide the composition with sufficient viscosity.

[0063] Preferably, the total concentration of thickening polymers of the present invention is not more than 15% by weight, more preferably not more than 12% by weight, and even more preferably not more than 10% by weight, calculated on the total weight of the composition, to provide sufficient viscosity to the composition and from a cost of goods standpoint.

[0064] In order to obtain the above-mentioned effects, the total concentration of the thickening polymer in the composition of the present invention is in the range of 0.1% by weight to 15% by weight, preferably 0.25% by weight to 12% by weight, and more preferably 0.5% by weight to 10% by weight, calculated based on the total weight of the composition.

[0065] Ready-to-use mixtures and methods of oxidation dyeing The present invention relates to a method for oxidative dyeing of keratinous fibers, preferably human keratinous fibers, more preferably human hair, comprising the steps of: i) preparing a two-part composition as defined above and mixing the compositions to provide a ready-to-use composition having a pH in the range of 7 to 12; ii) applying the ready-to-use composition to the keratin fibers and leaving it for a period ranging from 1 to 60 minutes; iii) rinsing the keratinous fibers and optionally washing the keratinous fibers with shampoo; The present invention also covers a method including the steps of:

[0066] The oxidation dyeing composition A is mixed with the aqueous oxidation composition B to form a ready-to-use composition. A suitable mixing ratio by weight is 5:1 to 1:5 (oxidation dyeing composition A:aqueous oxidation composition B). Conventionally, suitable mixing ratios are 1:1, 1:2, and 1:3 (oxidation dyeing composition A:aqueous oxidation composition B) by weight.

[0067] Suitably, the pH of the ready-to-use composition is in the range of 7 to 12. The pH of the ready-to-use composition is preferably in the range of 7.5 to 11, more preferably 8.0 to 10.5, from the viewpoint of accelerating the dyeing.

[0068] The ready-to-use composition is then applied to the keratinous fibers as defined in step ii) and left for 1 to 60 minutes. A preferred time range for step ii) is from 5 to 45 minutes, more preferably from 10 to 35 minutes, in view of sufficient dyeing of the keratinous fibers.

[0069] During step ii) and after application of the ready-to-use composition, heat may be applied in order to accelerate the oxidation dyeing. A suitable temperature range is 30°C to 50°C in terms of the oxidation dyeing speed and cosmetic safety.

[0070] The ready-to-use composition is then rinsed from the keratinous fibers, which are optionally washed with shampoo and optionally blow-dried with a hair dryer.

[0071] [Kit of Parts] A two-part composition as defined above, a bleaching powder composition comprising one or more persalts and / or peroxy salts and one or more alkalizing agents, - an aqueous bleaching composition comprising one or more alkalizing agents and having a pH in the range of 7 to 12; and another composition selected from Including kit-of-parts.

[0072] The bleaching powder composition comprises one or more persalts and / or peroxy salts. Suitable persalts and / or peroxy salts are sodium persulfate, potassium persulfate, ammonium persulfate, alkaline earth peroxides such as magnesium peroxide, maleimide peroxide, or urea peroxide, or phthalimidoperoxyhexanoic acid. In terms of bleaching power, preferred persalts are sodium persulfate, potassium persulfate, and ammonium persulfate.

[0073] From the viewpoints of bleaching power and cosmetic safety, the total concentration of the persalt and / or peroxy salt in the bleaching powder composition is preferably in the range of 10% by weight to 80% by weight, more preferably in the range of 15% by weight to 70% by weight, even more preferably in the range of 20% by weight to 60% by weight, and even more preferably in the range of 25% by weight to 60% by weight, calculated relative to the total weight of the bleaching powder composition.

[0074] The bleaching powder composition further comprises one or more alkalizing agents. Suitable alkalizing agents are metasilicates, in particular sodium metasilicate. The concentration of metasilicate in the bleaching powder composition is preferably in the range of 1% to 20% by weight, more preferably 5% to 15% by weight, calculated based on the total weight of the bleaching powder composition, in terms of alkalinity.

[0075] Other suitable alkalizing agents are alkali carbonate and bicarbonate salts, such as sodium, potassium, and ammonium salts. From the viewpoint of buffering capacity, preferred salts are bicarbonates, particularly preferred is ammonium bicarbonate. The suitable concentration of carbonate in the bleaching powder composition is in the range of 0.25% to 10% by weight, preferably in the range of 0.5% to 7.5% by weight, more preferably in the range of 0.75% to 5% by weight, and even more preferably in the range of 1% to 4% by weight, calculated based on the total weight of the bleaching powder composition, from the viewpoint of buffering capacity and low hair damage.

[0076] The bleaching powder composition is then mixed with the aqueous oxidizing composition B of the present invention to form a ready-to-use composition. A suitable mixing ratio is 5:1 to 1:5 (bleaching powder: composition B of the present invention) by weight. Conventionally, suitable mixing ratios are 1:1, 1:2, and 1:3 (bleaching powder: composition B of the present invention) by weight.

[0077] Suitably, the pH of the ready-to-use composition is in the range of 7 to 12. From the viewpoint of accelerating the dyeing, the pH of the ready-to-use composition is preferably in the range of 7.5 to 11, more preferably 8.0 to 10.5.

[0078] The ready-to-use composition is then applied to the keratin fibers and left for 1 to 60 minutes. The preferred time range for bleaching is 5 to 45 minutes, more preferably 10 to 35 minutes, in order to fully bleach the keratin fibers.

[0079] Optionally, heat may be applied while the ready-to-use composition is left on the keratin fibers. A suitable temperature range is between 30°C and 50°C.

[0080] The ready-to-use composition is then rinsed from the keratin fibers, which are optionally washed with shampoo and optionally dried with a hair dryer. The oxidation dyeing method is then applied as defined above. The aqueous lightening composition of step xii) before mixing is preferably an emulsion comprising one or more lipophilic compounds, which are also disclosed in the composition of the present invention.

[0081] Alternatively, an aqueous lightening composition is used for lightening / bleaching keratin fibers, which preferably has a pH in the range of 8 to 11, more preferably 8.5 to 10.5, from the standpoint of lightening performance.

[0082] The appropriate mix ratios are similar to those disclosed in the bleaching process above, but using an aqueous composition instead of bleaching powder.

[0083] The kit disclosed above is advantageous as a three-component bleaching / staining composition.

[0084] The following examples illustrate the invention but do not limit it. EXAMPLES

[0085] Example 1 The following oxidation dye composition A was prepared: weight% Cetearyl Alcohol 12 Sodium Cetearyl Sulfate 2 Cocamide MEA 5 Oleic Acid 2 Tetrasodium EDTA 1 Sodium sulfite 1 Ammonium hydroxide 5 Ammonium chloride 1 Toluene-2,5-diamine sulfate 0.75 Resorcinol 0.10 4-Chlorosorcinol 0.25 m-Aminophenol 0.05 4-Amino-2-hydroxytoluene 0.05 Fragrance 0.5 Water up to 100

[0086] The above composition had a pH of 9.9.

[0087] The following aqueous oxidizing composition B was prepared by dispersing cetearyl alcohol and sodium lauryl sulfate in water and heating the mixture to 60° C. under stirring. After cooling, the mixture was added to a hydrogen peroxide solution under constant stirring. Then, caffeine was dissolved as compound b).

[0088] [Table 1]

[0089] The compositions were prepared and stored for one month under controlled conditions at 40° C. The viscosity was measured and the results were found to be as follows:

[0090] [Table 2]

[0091] Further visual inspection of the compositions was performed and it was confirmed by the operator that Comparative Composition 1 was foamy and exhibited air bubbles on the surface, whereas Composition 1 of the present invention did not exhibit any bubbles and was not foamy.

[0092] Viscosity testing showed that the viscosity of inventive composition 1 increased by approximately 50% over a one month period, while the viscosity of comparative composition 1 increased by over 500-600% under certain storage conditions.

[0093] The above oxidation dyeing composition A was then mixed with the inventive composition 1 and the comparative composition 1, both after storage at 40°C for one month, in a weight ratio of 1:2 (oxidation dyeing composition A:inventive composition 1) to produce a ready-to-use composition having a pH of approximately 9.5.

[0094] Due to the high viscosity of Comparative Composition 1, precise mixing with the oxidation dye composition was not possible, leaving visible inhomogeneities in the ready-to-use mixture, and the mixture had to be further diluted with Composition B for complete dissolution.

[0095] The ready-to-use composition was then applied to human hair and left for 30 minutes at 40° C. Afterwards, the composition was rinsed off with water and the hair was washed with shampoo and blow-dried with a hair dryer.

[0096] It was found that hair was intensely colored reddish brown with composition 1 of the invention, but color strength and shine were visually significantly lower in hair streaks dyed with comparative composition 1.

[0097] Example 2 Composition B weight% Caffeine 0.01 Cetearyl Alcohol 4.0 Sodium lauryl sulfate 0.8 Phosphoric acid - enough to make pH 1.5 Tetrasodium EDTA 0.05 Diesel 3.0 Hydrogen Peroxide 3.0 Water up to 100.0

[0098] The concentration of caffeine as compound b) can also be adjusted to 0.05%, 0.1% or 0.5%, or any value therebetween, to achieve the same technical effect.

[0099] The concentration of hydrogen peroxide can be adjusted to 1%, 9%, 12%, 15% or 20% by weight, or any value therebetween.

[0100] Example 3 Composition B weight% Theobromine 0.01 Cetearyl Alcohol 4.0 Sodium Lauryl Sulfate 1.5 Phosphoric acid - enough to make pH 2.5 Tetrasodium EDTA 0.05 Sunflower oil 3.0 Stearyl alcohol 3.0 Hydrogen peroxide 6.0 Water up to 100.0

[0101] The concentration of theobromine as compound b) can also be adjusted to 0.05%, 0.1% or 0.5%, or any value therebetween, to achieve the same technical effect.

[0102] Theobromine can also be replaced by xanthine or theophylline.

[0103] The concentration of hydrogen peroxide can be adjusted to 3%, 9%, 12%, 15% or 20% by weight, or any value therebetween.

[0104] Example 4 Composition B weight% Caffeine 0.01 Theobromine 0.05 Theophylline 0.05 Cetearyl Alcohol 4.0 Sodium lauryl sulfate 0.8 Phosphoric acid, enough to make pH 3.0 Tetrasodium EDTA 0.05 Isopropyl myristate 3.0 Dimethicone 100cs 0.5 Hydrogen Peroxide 3.0 Water up to 100.0

[0105] The concentration of theobromine as compound b) can also be adjusted to 0.05%, 0.1% or 0.5%, or any value therebetween, to achieve the same technical effect.

[0106] Theobromine can also be replaced by xanthine or theophylline.

[0107] The concentration of hydrogen peroxide can be adjusted to 1%, 3%, 9%, 12%, 15% or 20% by weight, or any value therebetween.

Claims

1. a dyeing composition A having a pH ranging from 7 to 12 and comprising one or more oxidation dye precursors and / or oxidation dye couplers, and one or more alkalizing agents; a) hydrogen peroxide, in a concentration ranging from 2% to 12% by weight, calculated relative to the total weight of the aqueous oxidizing composition B; b) a molecule having the following structure: 【Chemistry 1】 [In the formula, R 1 , R 2 , and R 3 is H and CH 3 and / or mixtures thereof, in a total concentration ranging from 0.01% to 0.08% by weight, calculated relative to the total weight of the aqueous oxidizing composition B; c) one or more lipophilic compounds an aqueous oxidizing composition B which is an oil-in-water emulsion and has a pH in the range of 1 to 6; A two-part oxidizing composition comprising:

2. 2. The composition according to claim 1, characterized in that composition A comprises one or more oxidation dye precursors and / or oxidation dye couplers in a total concentration ranging from 0.001% to 10% by weight, calculated relative to the total weight of composition A.

3. Composition A comprises ammonia and / or a salt thereof, the general structure: 【Chemistry 2】 [In the formula, R 4 , R 5 , R 6 is H, C 1 ~C 4 Alkyl, C 3 ~C 4 Unsaturated alkyl, C 3 ~C 4 Branched chain alkyl, C 1 ~C 4 Hydroxyl alkyl, C 3 ~C 4 Unsaturated hydroxyl alkyl, C 3 ~C 4 branched hydroxyl alkyl, where R 4 , R 5 , or R 6 3. The composition according to claim 1, further comprising one or more alkalizing agents selected from the alkyl or alkanolamines of the formula:

4. 4. The composition according to claim 1, wherein the alkalizing agent is selected from ammonia and / or its salts, monoethanolamine, and / or 2-aminomethylpropanol, and / or mixtures thereof.

5. 5. Composition according to claim 1, characterized in that the total concentration of alkalizing agents in composition A ranges from 0.25% to 15% by weight, calculated relative to the total weight of composition A.

6. 6. Composition according to any one of claims 1 to 5, characterized in that at least one compound in b) is caffeine.

7. The compound of formula c) is 12 ~C 22 Fatty alcohols, C 3 ~C 12 Alcohol and C 12 ~C 22 Esters with fatty acids, C 8 ~C 22 7. Composition according to any one of claims 1 to 6, characterized in that it is selected from fatty acids, vegetable oils, and / or silicones, and / or hydrocarbon-based products, and / or mixtures thereof.

8. 8. Composition according to claim 1, characterized in that the concentration of compound c) ranges from 1% to 20% by weight, calculated relative to the total weight of composition B.

9. 9. Composition according to claim 1, characterized in that composition A and / or composition B comprises as compound d) one or more surfactants.

10. 10. Composition according to any one of claims 1 to 9, characterized in that composition A and / or B comprises, as compound d), one or more surfactants chosen from nonionic surfactants, anionic surfactants, cationic surfactants and / or amphoteric / zwitterionic surfactants, and / or mixtures thereof.

11. 11. Composition according to claim 1, characterized in that composition A and / or composition B comprises, as compound d), one or more surfactants selected from anionic surfactants.

12. 12. Composition according to any one of claims 1 to 11, characterized in that composition A and / or B comprises one or more thickening polymers selected from anionic, nonionic and cationic thickening polymers.

13. 13. The composition according to claim 1, wherein the viscosity of composition B is in the range of 1,000 Pas to 25,000 mPa s, determined by a cone and plate viscometer at 25° C. under atmospheric conditions.

14. 1. A method for oxidative dyeing of keratin fibers, comprising the steps of: i) preparing a two-part composition according to any one of claims 1 to 13 and mixing the compositions to provide a ready-to-use composition having a pH in the range of 7 to 12; ii) applying the ready-to-use composition to the keratin fibers and leaving it for a period ranging from 1 to 60 minutes; iii) rinsing the keratinous fibers and optionally washing the keratinous fibers with shampoo; The method includes:

15. A two-part composition according to any one of claims 1 to 13, a bleaching powder composition comprising one or more persalts and / or peroxy salts and one or more alkalizing agents; - an aqueous bleaching composition comprising one or more alkalizing agents and having a pH in the range of 7 to 12; and a further composition selected from Kit of parts including:

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