Kit of parts and composition for dyeing keratin fibers, dyeing method and their use

Abstract

The present invention relates to a kit of parts, a dyeing composition and a dyeing method for dyeing keratin fibers. Aqueous composition B comprises guanidine and / or a salt thereof.

Description

Technical Field

[0001] The present invention relates to a kit of parts, a dyeing method and the use of a composition for dyeing keratin fibers. Further, a two-part or three-part dye composition is disclosed.

Background Art

[0002] The use of direct dyes is common for imparting color to keratin fibers. Such dyes are advantageous over oxidative dyes in that they cause less damage to keratin fibers during the dyeing process. Further, compared to oxidative dyes, both end-users and professional cosmetologists can better imagine the color of the hair after dyeing before applying the dye composition to the hair. This is because the color of the direct dye composition is very close to the color of the hair after dyeing. As a result, the appearance of the hair, especially after repeating the hair dyeing cycle, is more attractive and as intended.

[0003] Common problems with direct dyes are insufficient dyeability of keratin fibers and low wash fastness. The prior art has addressed this problem, but only partially satisfactory solutions have been obtained.

[0004] Patent Documents 1 to 4 disclose oxidative compositions for bleaching / dyeing keratin fibers containing guanidine compounds. It is described that the guanidine compound catalyzes the polymerization of oxidative dyes. However, the present invention relates to direct dyes and has different technical effects as shown below.

[0005] Patent Documents 5 to 7 disclose bleaching powders containing guanidine compounds. However, the present invention relates to the aqueous composition B.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

[0007] A first object of the present invention is a kit of parts comprising two or more independent compositions for dyeing keratin fibers, preferably human keratin fibers, more preferably human hair, - One of the independent compositions is Composition A containing one or more direct dyes and one or more alkaline agents, - One of the independent compositions is Composition B which is an aqueous composition having a pH of 1 or more and less than 6, a) One or more guanidine compounds and / or salts thereof, b) One or more lipophilic compounds and / or one or more thickening polymers, and c) Optionally one or more oxidizing agents wherein Composition B contains the same, characterized by a kit of parts.

[0008] A second object of the present invention is a three-part dye composition comprising Composition A defined above, Composition B defined above, and Composition C containing one or more peroxyacid salts and / or persulfates.

[0009] A third object of the present invention is a method for dyeing keratin fibers, preferably human keratin fibers, more preferably human hair, comprising the following steps: i) Providing the composition A defined above; ii) Providing the composition B defined above; iii) Optionally providing the composition C defined above; iv) Mixing the compositions of steps i), ii) and optionally iii) to produce a ready-to-use composition having a pH of 7 to 12 immediately prior to use; v) Applying the ready-to-use composition to the keratin fibers for 1 minute to 60 minutes; vi) Optionally rinsing the keratin fibers; which is a method comprising.

[0010] A fourth object of the present invention is the use of a composition defined as composition B above, for improving the color intensity and / or wash fastness of one or more direct dyes in keratin fibers, preferably human keratin fibers, more preferably human hair, provided that the composition B is mixed with the composition A defined above immediately prior to application to the keratin fibers.

Mode for Carrying Out the Invention

[0011] As a result of long-term deliberative research, the present inventors have found that a kit of parts containing a composition B having a pH of 1 or more and less than 6 and containing one or more guanidine compounds, one or more lipophilic compounds, and optionally an oxidizing agent provides stronger fast dyeing of direct dyes present in the composition A isolated in keratin fibers. Furthermore, since direct dyes tend to precipitate in the presence of guanidine compounds, the storage stability of direct dyes is improved by using guanidine compounds in composition B.

[0012] Without being bound by any theory, guanidine and / or its salts are thought to promote the penetration of direct dyes into hair fibers and "confine" the dyes to hair fibers by weak intermolecular interactions. As a result, the inventors of the present invention confirmed better dyeing efficiency and improved wash fastness.

[0013] Composition A Composition A contains one or more direct dyes and one or more alkaline agents. Suitable direct dyes are selected from nonionic, anionic and / or cationic direct dyes.

[0014] Examples of nonionic direct dyes include, but are not limited to, neutral nitro dyes. Non-limiting suitable examples include HC Blue 2, HC Blue 4, HC Blue 5, HC Blue 6, HC Blue 7, HC Blue 8, HC Blue 9, HC Blue 10, HC Blue 11, HC Blue 12, HC Blue 13, HC Brown 1, HC Brown 2, HC Green 1, HC Orange 1, HC Orange 2, HC Orange 3, HC Orange 5, HC Red BN, HC Red 1, HC Red 3, HC Red 7, HC Red 8, HC Red 9, HC Red 10, HC Red 11, HC Red 13, HC Red 54, HC Red 14, HC Violet BS, HC Violet 1, HC Violet 2, HC Yellow 2, HC Yellow 4, HC Yellow 5, HC Yellow 6, HC Yellow 7, HC Yellow 8, HC Yellow 9, HC Yellow 10, HC Yellow 11, HC Yellow 12, HC Yellow 13, HC Yellow 14, HC Yellow 15, 2-amino-6-chloro-4-nitrophenol, picramic acid, 1,2-diamino-4-nitrobenzene, 1,4-diamino-2-nitrobenzene, 3-nitro-4-aminophenol, 1-hydroxy-2-amino-3-nitrobenzene and 2-hydroxyethyl picramic acid. Further non-limiting examples are direct dyes that are neutral in an aqueous solution at pH 7 to 12, such as HC Blue 18, HC Red 18, and HC Yellow 16.

[0015] Non-limiting examples of cationic dyes include Basic Blue 6, Basic Blue 7, Basic Blue 9, Basic Blue 26, Basic Blue 41, Basic Blue 99, Basic Brown 4, Basic Brown 16, Basic Brown 17, Basic Orange 31, Natural Brown 7, Basic Green 1, Basic Red 2, Basic Red 12, Basic Red 22, Basic Red 51, Basic Red 76, Basic Violet 1, Basic Violet 2, Basic Violet 3, Basic Violet 10, Basic Violet 14, Basic Yellow 57, and Basic Yellow 87.

[0016] Non-limiting examples of anionic direct dyes include Acid Black 1, Acid Blue 1, Acid Blue 3, Food Blue 5, Acid Blue 7, Acid Blue 9, Acid Blue 74, Acid Orange 3, Acid Orange 6, Acid Orange 7, Acid Orange 10, Acid Red 1, Acid Red 14, Acid Red 18, Acid Red 27, Acid Red 50, Acid Red 52, Acid Red 73, Acid Red 87, Acid Red 88, Acid Red 92, Acid Red 155, Acid Red 180, Acid Violet 9, Acid Violet 43, Acid Violet 49, Acid Yellow 1, Acid Yellow 23, Acid Yellow 3, Food Yellow No. 8, D&C Brown No. 1, D&C Green No. 5, D&C Green No. 8, D&C Orange No. 4, D&C Orange No. 10, D&C Orange No. 11, D&C Red No. 21, D&C Red No. 27, D&C Red No. 33, D&C Violet 2, D&C Yellow No. 7, D&C Yellow No. 8, D&C Yellow No. 10, FD&C Red 2, FD&C Red 40, FD&C Red No. 4, FD&C Yellow No. 6, FD&C Blue 1, Food Black 1, Food Black 2, Disperse Black 9, Disperse Violet 1, and their alkali metal (sodium, potassium, etc.) salts.

[0017] From the viewpoints of color strength and color brilliance, as the direct dye for Composition A, HC Blue 18, HC Red 18, HC Yellow 16 and / or a mixture thereof, and / or salts thereof are preferred.

[0018] From the viewpoint of improving the color strength of keratin fibers, the total concentration of the direct dye in Composition A calculated based on the total weight of Composition A is 0.01% by weight or more, preferably 0.1% by weight or more, more preferably 0.25% by weight or more.

[0019] From the viewpoints of improving the color strength of keratin fibers, dye solubility and economy, the total concentration of the direct dye in Composition A calculated based on the total weight of Composition A is 10% by weight or less, preferably 8% by weight or less, more preferably 5% by weight or less.

[0020] To achieve the above effects, the total concentration of the direct dye in Composition A calculated based on the total weight of Composition A is 0.01% by weight to 10% by weight, preferably 0.1% by weight to 8% by weight, more preferably 0.25% by weight to 5% by weight.

[0021] Composition A contains one or more alkaline agents, and suitable alkaline agents are ammonia and / or its salts, sodium metasilicate, 2-amino-2-methylpropanol, 2-amino-2-hydroxymethyl-propan-1,3-diol, general structural formula

[0022]

Chemical formula

[0023] 〔In the formula, R 1 , R 2 and R 3 are each independently H, a linear C 1 ~C 6 alkyl which may be substituted by one hydroxyl group, and branched C 3 ~C 12 alkyl and alkanol, and at least one R 1 , R 2 or R3 It is not H. It is selected from organic alkylamines and / or alkanolamines represented by and / or salts thereof.

[0024] The organic alkyl and / or alkanolamines corresponding to the above structure can be selected from mono- and / or diethanolamine, butylethanolamine, butyldiethanolamine, dibutylethanolamine, methylethanolamine, triethanolamine, N-lauryl diethanolamine, diisopropanolamine, dimethylisopropanolamine, isopropanolamine, triisopropanolamine, isobutanolamine, monoethylamine, diethylamine, and trimethylamine.

[0025] From the viewpoints of formulation freedom and no unpleasant odor, the most preferred organic amine is mono- or diethanolamine. From the viewpoint of dyeing strength, the most preferred alkali agents are ammonia and / or its salts, and 2-amino-2-methylpropanol.

[0026] From the viewpoint of achieving sufficient alkalinity in the immediately usable mixture, the total concentration of the alkali agent in Composition A, calculated based on the total amount of Composition A, is 0.5% by weight or more, preferably 1% by weight or more, more preferably 2% by weight or more.

[0027] From the viewpoints of achieving sufficient alkalinity in the immediately usable mixture and economic reasons, the total concentration of the alkali agent in Composition A is 30% by weight or less, preferably 20% by weight or less, more preferably 15% by weight or less.

[0028] To achieve the above effects, the total concentration of the alkali agent in Composition A, calculated based on the total amount of Composition A, is 0.5% to 30% by weight, preferably 1% to 20% by weight, more preferably 2% to 15% by weight.

[0029] Composition A can be in any form suitable as a cosmetic, such as an aqueous composition, a non-aqueous liquid composition, or a powder composition.

[0030] When composition A is an aqueous composition, from the perspective of achieving an alkaline pH of the immediately usable mixture, the pH of the composition is 7 to 12, preferably 8 to 11, more preferably 8.5 to 10.

[0031] When composition A is a non-aqueous liquid composition, this composition is a dye solution in one or more suitable organic solvents as disclosed in WO2018087203.

[0032] When composition A is a powder composition, this composition contains additional powder components as disclosed in WO2019057829.

[0033] From the perspective of the stability of the dye, it is preferable that composition A does not contain peroxy salts and / or persulfates.

[0034] Composition A may further contain one or more thickening polymers, one or more lipophilic compounds, or one or more surfactants, which will also be described with respect to the following composition B.

[0035] Composition B Composition B is an aqueous composition with a pH of 1 or more and less than 6, a) one or more guanidine compounds and / or their salts, b) one or more lipophilic compounds and / or one or more thickening polymers, and c) optionally contains one or more oxidizing agents.

[0036] From the perspective of the safety as a cosmetic, the pH of composition B is preferably 2 to 5, more preferably 2.5 to 4.5.

[0037] From the perspective of the stability of the composition, it is preferable that composition B does not contain peroxy salts and / or persulfates.

[0038] From the perspective of the stability of the composition, it is preferred that Composition B does not contain any direct dyes, but this does not exclude the presence of one or more direct dyes. However, those skilled in the art must carefully select appropriate direct dyes based on their compatibility with Composition B. The basis for appropriate selection lies in the storage stability of Composition B and the stability during mixing to produce a ready-to-use composition.

[0039] The compound of a) The composition of the present invention contains one or more guanidine compounds and / or salts thereof as the compound of a).

[0040] Preferably, from the perspective of improving the color strength of keratin fibers, the compound of a) is selected from guanidine, guanidine carbonate, guanidine hydrochloride, guanidine sulfate, guanidine phosphate, and / or mixtures thereof. From the perspectives of improving the color strength of keratin fibers and the washing fastness of direct dyes, guanidine sulfate is most preferred as the compound of a).

[0041] In one aspect of the present invention, guanidine sulfate can be generated in situ by adding sulfuric acid to any of the other guanidine compounds other than the guanidine sulfate listed above.

[0042] From the perspective of improving the color strength of keratin fibers, the total concentration of the compound of a) in Composition B, calculated based on the total weight of Composition B, is 0.1% by weight or more, preferably 0.5% by weight or more, more preferably 1% by weight or more.

[0043] From the perspectives of improving the color strength of keratin fibers and the solubility of the compound, the total concentration of the compound of a) in Composition B, calculated based on the total weight of Composition B, is 10% by weight or less, preferably 8% by weight or less, more preferably 6% by weight or less.

[0044] To achieve the above effects, the total concentration of the compound of a) in Composition B, calculated based on the total weight of Composition B, is 0.1% by weight to 10% by weight, preferably 0.5% by weight to 8% by weight, more preferably 1% by weight to 6% by weight.

[0045] The compound of b) The composition of the present invention contains one or more lipophilic compounds and / or one or more thickening polymers as the compound of b).

[0046] Preferably, from the viewpoints of non-reactivity with the dyeing component and compatibility as a cosmetic, the lipophilic compound of b) is a branched or linear saturated or unsaturated C 12 ~C 22 fatty alcohol, a branched or linear C 3 ~C 12 alcohol and a linear or branched saturated or unsaturated C 8 ~C 22 fatty acid ester, a petrolatum-based product and / or a mixture thereof.

[0047] Preferably, from the viewpoint of non-reactivity with the dyeing component, the petrolatum-based product is preferably selected from mineral oil, liquid paraffin, paste paraffin and / or solid paraffin, and / or a mixture thereof.

[0048] Preferably, the branched or linear, saturated or unsaturated C 12 ~C 22 fatty alcohol is lauryl alcohol, tridecyl alcohol, myristyl alcohol, pentadecyl alcohol, cetyl alcohol, palmitoleyl alcohol, heptadecyl alcohol, stearyl alcohol, oleyl alcohol, nonadecyl alcohol, arachidyl alcohol, behenyl alcohol and / or a mixture thereof. Such a mixture is cetearyl alcohol containing stearyl alcohol and cetyl alcohol.

[0049] From the viewpoint of compatibility as a cosmetic, the most preferred lipophilic compound of b) is cetearyl alcohol and / or mineral oil.

[0050] From the perspective of improving the color intensity of keratin fibers, the total concentration of the lipophilic compound in Composition B calculated based on the total weight of Composition B is 0.5% by weight or more, preferably 1% by weight or more, more preferably 2% by weight or more.

[0051] From the perspectives of improving the color intensity of keratin fibers and formulating a stable cosmetic composition, the total concentration of the lipophilic compound in Composition B calculated based on the total weight of Composition B is 20% by weight or less, preferably 15% by weight or less, more preferably 12% by weight or less.

[0052] To achieve the above effects, the total concentration of the lipophilic compound in Composition B calculated based on the total weight of Composition B is 0.5% by weight to 20% by weight, preferably 1% by weight to 15% by weight, more preferably 2% by weight to 12% by weight.

[0053] Preferably, the thickening polymer of b) is selected from polymers that can provide a viscosity of 500 mPa·s in a 1% by weight aqueous solution within a desirable pH range of 1 or more and less than 6.

[0054] Suitable polymers are, for example, xanthan gum, dehydroxanthan gum, methyl cellulose, ethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose and / or mixtures thereof.

[0055] From the perspectives of viscosity and simplicity, the total concentration of the thickening polymer of b) in Composition B calculated based on the total weight of Composition B is 0.1% by weight or more, more preferably 0.2% by weight or more, still more preferably 0.5% by weight or more.

[0056] From the perspectives of viscosity and simplicity, the total concentration of the thickening polymer of b) in Composition B calculated based on the total weight of Composition B is 10% by weight or less, more preferably 8% by weight or less, still more preferably 5% by weight or less.

[0057] In order to achieve the above effects, the total concentration of the thickening polymer in Composition B calculated based on the total weight of Composition B is 0.1% to 10% by weight, preferably 0.2% to 8% by weight, more preferably 0.5% to 5% by weight.

[0058] Those skilled in the art should understand that the lipophilic compound of b) and the thickening polymer can be combined. By using both of them, Composition B can be thickened to achieve the desired technical effects. In this case, those skilled in the art can select an appropriate ratio of the lipophilic compound and the thickening polymer.

[0059] Compound of c) The composition of the present invention optionally contains one or more oxidizing agents.

[0060] Preferably, from the perspective of achieving the luster of keratin fibers during the dyeing process, the compound of c) is hydrogen peroxide.

[0061] From the perspective of achieving sufficient luster, the total concentration of the compound of c) (preferably hydrogen peroxide) in Composition B calculated based on the total weight of Composition B is 0.5% by weight or more, preferably 1% by weight or more, more preferably 2% by weight or more.

[0062] From the perspective of reducing damage to keratin fibers, the total concentration of the compound of c) (preferably hydrogen peroxide) in Composition B calculated based on the total weight of Composition B is 20% by weight or less, preferably 15% by weight or less, more preferably 12% by weight or less.

[0063] In order to achieve the above effects, the total concentration of the compound of c) (preferably hydrogen peroxide) in Composition B calculated based on the total weight of Composition B is 0.5% to 20% by weight, preferably 1% to 15% by weight, more preferably 2% to 12% by weight.

[0064] However, when the luster of keratin fibers is not desired, the composition of the present invention does not contain an oxidizing agent (preferably hydrogen peroxide).

[0065] The compound of d) From the viewpoint of improving the stability of the composition, Composition B can contain one or more surfactants as the compound of d). This surfactant is preferably selected from anionic, nonionic, cationic and / or amphoteric / bzwitterionic surfactants and / or mixtures thereof.

[0066] Preferably, from the viewpoint of improving emulsion stability, the total concentration of the compound of d) in Composition B, calculated based on the total weight of Composition B, is 0.05% by weight or more, more preferably 0.1% by weight or more, still more preferably 0.2% by weight or more.

[0067] Preferably, from the viewpoints of emulsion stability and product cost, the total concentration of the compound of d) in Composition B, calculated based on the total weight of Composition B, is 15% by weight or less, more preferably 10% by weight or less, still more preferably 5% by weight or less.

[0068] To achieve the above effects, the total concentration of the compound of d) in Composition B, calculated based on the total weight of Composition B, is 0.05% by weight to 15% by weight, preferably 0.1% by weight to 10% by weight, more preferably 0.2% by weight to 5% by weight.

[0069] Suitable compounds of d) are shown below.

[0070] From the viewpoint of emulsion stability, suitable compounds of d) are anionic surfactants and / or nonionic surfactants.

[0071] Anionic surfactant Preferably, from the viewpoint of emulsion stability, the anionic surfactant is 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.

[0072] Suitable alkyl sulfates, or preferably ethoxylated alkyl ether sulfates surfactants or mixtures thereof, have an alkyl chain length C 10 ~C 22 having.

[0073] Suitable examples of alkyl sulfate surfactants include lauryl sulfate, myristyl sulfate, oleyl sulfate and behenyl sulfate.

[0074] Suitable examples of alkyl ether sulfate surfactants include laureth sulfate, ceteareth sulfate, pareth sulfate, capryleth sulfate, myreth sulfate, oleth sulfate, deceth sulfate, trideceth sulfate, coceth sulfate, C 10 ~C 16 alkyl sulfate, C 11 ~C 15 alkyl sulfate, C 12 ~C 18 alkyl sulfate, C 12 ~C 15 alkyl sulfate, C 12 ~C 16 alkyl sulfate, C 12 ~C 13 alkyl sulfate, lauryl sulfate, myristyl sulfate, palm kernel sulfate, cetearyl sulfate, cetyl sulfate, decyl sulfate, oleyl sulfate, behenyl sulfate and / or salts thereof. All of the aforementioned anionic surfactants may or may not be ethoxylated at various degrees of ethoxylation.

[0075] All cations of the aforementioned surfactants can be selected from sodium, potassium, magnesium and / or ammonium.

[0076] From the viewpoint of emulsion stability, sodium lauryl sulfate is most preferred as the anionic surfactant.

[0077] Nonionic surfactants Suitable nonionic surfactants are selected from alkyl polyglycosides, ethoxylated triglycerides, ethoxylated aliphatic alcohols and / or mixtures thereof.

[0078] Suitable examples of alkyl polyglycosides include decyl glucoside, lauryl glucoside and coco glucoside.

[0079] More suitable nonionic surfactants are ethoxylated triglycerides. Well-known and commonly used examples include ethoxylated castor oils such as PEG-40 hydrogenated castor oil and PEG-60 hydrogenated castor oil.

[0080] Suitable examples of ethoxylated aliphatic alcohols include C9-11 pareth 6, C9-11 pareth 8, C9-15 pareth 8, C11-13 pareth 9, C11-13 pareth 10, C11-15 pareth 5, C11-15 pareth 7, C11-15 pareth 9, C11-15 pareth 12, C11-15 pareth 15, C11-15 pareth 20, C11-15 pareth 30, C11-15 pareth 40, C11-21 pareth 10, C12-13 pareth 5, C12-13 pareth 6, C12-13 pareth 7, C12-13 pareth 9, C12-13 pareth 10, C12-13 pareth 15, C12-13 pareth 23, C12-14 pareth 5, C12-14 pareth 7, C12-14 pareth 9, C12-14 pareth 11, C12-14 pareth 12, C12-15 pareth 5, C12-15 pareth 7, C12-15 pareth 9, C12-15 pareth 10, C12-15 pareth 11, C12-15 pareth 12, C12-16 pareth 5, C12-16 pareth 7, C12-16 pareth 9, C13-15 pareth 21, C14-15 pareth 7, C14-15 pareth 8, C14-15 pareth 11, C14-15 pareth 12, C14-15 pareth 13, C20-22 pareth 30, C20-40 pareth 10, C20-40 pareth 24, C20-40 pareth 40, C20-40 pareth 95, C22-24 pareth 33, beheneth 5, beheneth 10, beheneth 15, beheneth 20, beheneth 25, beheneth 30, cetearyl ethoxylate 5, cetearyl ethoxylate 6, cetearyl ethoxylate 7, cetearyl ethoxylate 10, cetearyl ethoxylate 11, cetearyl ethoxylate 12, cetearyl ethoxylate 15, cetearyl ethoxylate 20, cetearyl ethoxylate 25, cetearyl ethoxylate 30, cetearyl ethoxylate 35, cetearyl ethoxylate 40, lauryl ethoxylate-5, lauryl ethoxylate-10, lauryl ethoxylate-15, lauryl ethoxylate-20, lauryl ethoxylate-25, lauryl ethoxylate-30, lauryl ethoxylate-40, myristyl ethoxylate-5, myristyl ethoxylate-10, cetyl ethoxylate 5, cetyl ethoxylate 10, cetyl ethoxylate 15, cetyl ethoxylate 20, cetyl ethoxylate 25, cetyl ethoxylate 30, cetyl ethoxylate 40, oleyl ethoxylate 5, oleyl ethoxylate 10, oleyl ethoxylate 15, oleyl ethoxylate 20, oleyl ethoxylate 25, oleyl ethoxylate 30, oleyl ethoxylate 40, stearyl ethoxylate 5, stearyl ethoxylate 10, stearyl ethoxylate 15, stearyl ethoxylate 20, stearyl ethoxylate 25, stearyl ethoxylate 30, stearyl ethoxylate 35 and stearyl ethoxylate 40.

[0081] Amphoteric Zwitterionic Surfactant Suitable compounds include cocamidopropyl hydroxysultaine, lauramidopropyl hydroxysultaine, erucamidopropyl hydroxysultaine, lauryl hydroxysultaine, cocoil hydroxysultaine and / or their salts, etc., which are known as hydroxy sultaine surfactants.

[0082] Further suitable examples of amphoteric / zwitterionic surfactants are betaine-type surfactants. Suitable compounds can be selected from alkyl betaines and / or alkylamide betaines. A preferred compound selected from alkyl betaines is lauryl betaine. A preferred compound selected from alkylamide betaines is cocamidopropyl betaine. The present disclosure also applies to the salts of these compounds.

[0083] Cationic surfactant Suitable examples of cationic surfactants include cetyltrimethylammonium chloride, stearyltrimonium chloride, dipalmitoyldimonium chloride, distearyldimethylammonium chloride, stearamidopropyltrimethylammonium chloride, dioleoylethyldimethylammonium methosulfate, dioleoylethylhydroxyethylmonium methosulfate and behenyltrimethylammonium chloride.

[0084] Composition C In one aspect of the present invention, the kit of parts includes Composition C.

[0085] In such a case, from the perspective of imparting luster to the color of the hair, Composition C preferably contains one or more peroxyacid salts and / or persulfates.

[0086] From the perspective of composition stability, in the latter case, Composition C is a powder composition, preferably a dry powder composition.

[0087] Suitable peroxyacid salts and / or persulfates include sodium persulfate, potassium persulfate, ammonium persulfate, alkaline earth metal peroxides (such as magnesium peroxide), melamine peroxide, urea peroxide, and phthalimide peroxyhexanoic acid. From a commercial and bleach efficiency perspective, sodium persulfate and potassium persulfate are preferred as peroxyacid salts.

[0088] From the perspective of bleach efficiency, the total concentration of peroxyacid salt and / or persulfate in Composition C, calculated based on the total weight of the composition, is 10% by weight or more, preferably 15% by weight or more, more preferably 20% by weight or more.

[0089] From the perspectives of bleach efficiency and powder dispersibility, the total concentration of peroxyacid salt and / or persulfate in Composition C, calculated based on the total weight of the composition, is 80% by weight or less, preferably 70% by weight or less, more preferably 60% by weight or less.

[0090] To achieve the above effects, the total concentration of peroxyacid salt and / or persulfate in Composition C, calculated based on the total weight of Composition C, is 10% to 80% by weight, preferably 15% to 70% by weight, more preferably 20% to 60% by weight, and most preferably 25% to 60% by weight.

[0091] In a composition that can be used immediately, from the perspective of achieving sufficient alkalinity for bleaching, Composition C preferably further contains one or more alkaline agents. From the perspective of hygroscopicity, sodium metasilicate is preferred as the alkaline agent. A suitable concentration calculated based on the total weight of Composition C is 1% to 20% by weight.

[0092] It is further described that in order to achieve a sufficient bleaching effect on keratin fibers, it is necessary to have hydrogen peroxide or an oxidizing agent suitable for other bleaching present. Thus, in this case, either composition B contains the hydrogen peroxide of feature c), or the kit of parts of the present invention contains an additional composition containing hydrogen peroxide which is stored separately until immediately before use. The suitable concentration of hydrogen peroxide is as described in feature c).

[0093] Mixing of kit components From the viewpoint of stability, it is preferable to keep the components of the kit separately until immediately before use.

[0094] Therefore, each component of this kit is preferably mixed immediately before application to keratin fibers.

[0095] Three - part composition The present invention can be in the form of a three - part dyeing composition comprising composition A as defined above, composition B as defined above and composition C as defined above.

[0096] This embodiment is particularly suitable for customers with black hair who desire a high degree of shine along with hair dyeing. In this case, the presence of composition B is also essential for feature c).

[0097] The three - part dye composition is kept separately until immediately before use. Mixing each component in an appropriate ratio, preferably 1:1:0.1 (by weight) (composition A:B:C) to 1:2:0.5 (by weight) (composition A:B:C) produces a mixture that can be used immediately.

[0098] Dyeing method The present invention further relates to a method for dyeing keratin fibers, preferably human keratin fibers, more preferably human hair, the method comprising the following steps: i) providing composition A as defined above, ii) providing composition B as defined above, iii) optionally providing composition C as defined above, iv) Immediately before use, mixing the compositions of steps i), ii) and optionally iii) to produce a ready-to-use composition having a pH of 7 to 12; v) Applying the ready-to-use composition to the keratin fibers for 1 to 60 minutes; vi) Optionally rinsing the keratin fibers; relates to a method comprising.

[0099] In the above method, from the viewpoints of color intensity and brightness, the direct dye in step i ) is preferably selected from HC Blue 18, HC Red 18 and HC Yellow 16.

[0100] From the viewpoints of imparting color intensity and minimizing hair damage, the pH of the ready-to-use composition in step iv) is 8 to 11, more preferably 8.5 to 10.

[0101] From the viewpoints of imparting color intensity and minimizing hair damage, the ready-to-use composition in step v) is applied for 5 to 45 minutes, more preferably 10 to 30 minutes.

[0102] From the viewpoint of safety as a cosmetic, in step vi), preferably before the shampoo step, it is preferable to rinse the ready-to-use composition with water.

[0103] Use of the composition Another object of the present invention is the use of a composition defined as composition B for dyeing keratin fibers, preferably human keratin fibers, more preferably human hair, provided that composition B is mixed with composition A defined above immediately before application to the hair, for improving the color intensity and / or wash fastness of one or more direct dyes.

[0104] Composition B defined above provides high color intensity to keratin fibers, which can be observed when comparing fiber streaks dyed with the composition of the present invention and compositions other than the present invention. Furthermore, the wash fastness of the direct dye is also improved.

[0105] The present invention will be described in the following examples, but the present invention is not limited thereto.

Example

[0106] Examples 1 to 3 Dyes were dissolved in water containing organic amines to prepare the following first composition. After all components were completely dissolved, the final pH was adjusted.

[0107] wt% HC Blue 18 0.1 HC Red 18 0.08 HC Yellow 16 0.05 Monoethanolamine 2.0 NaOH / HCl Adjusted to pH 9 Water To a total of 100.0

[0108] Surfactants were dissolved in water, and guanidine salts were added if present to prepare the following second composition. Subsequently, this solution was heated to 60°C, and mineral oil was added with stirring. After cooling, hydrogen peroxide solution was added, and the final pH was adjusted with phosphoric acid.

[0109]

Table 1

[0110] The L*, a*, and b* of the untreated hair streak were 82.76, 1.02, and 13.91, respectively. The first composition and each second composition were mixed at a weight ratio of 1:1 to obtain a ready-to-use mixture at pH 9.

[0111] Examples 1 and 2 show all the objects of the present invention.

[0112] The compositions A of Examples 4 to 7 and Comparative Examples 8 and 9 were first prepared by dissolving 2-amino-methylpropanol in 1,2-propanediol, and then adding the dye. Each mixture was stirred until complete dissolution. Composition B was prepared as shown in Examples 1 to 3.

[0113]

Table 2

[0114] Examples 10 to 13 The following compositions were prepared in the same manner as the previous examples, except for Comparative Example 13. Comparative Example 13 was prepared by dissolving a surfactant in water, and then adding a guanidine salt and 2-aminomethylpropanol. Thereafter, each solution was heated to 60 °C, and mineral oil was added with stirring. After cooling, a phosphoric acid solution was added to adjust the final pH.

[0115]

Table 3

[0116]

Table 4

[0117] Method Hair dyeing experiment Blonde hair streaks of white people were obtained from volunteers and grouped into hair bundles of 2 g per bundle. Each streak was washed with a commercially available shampoo (product name: Goldwell Dualsenses Scalp Specialist Deep Cleansing Shampoo), rinsed well, and completely air-dried. After complete air-drying of the hair streaks, the color of the hair was measured by spectroscopic analysis using DataColor 45G CT (DataColor, Lawrenceville, NJ, USA). The measurement was taken at 5 points per hair streak, and the average was calculated (L 1 , a 1 , b 1 ).

[0118] Next, 1 g of each of the above example compositions was applied to hair streaks, massaged for 1 minute, and then left for 15 minutes. Thereafter, the streaks were rinsed with warm water for 1 minute and dried with a blow dryer. The hair streaks were combed with a comb, and color measurements were taken at five different points per wet hair streak (L 2 , a 2 , b 2 ). According to the CIE*Lab color space obtained by the measurement, the Lab values and ΔE*ab regarding the color difference are calculated by the following formulas.

[0119] [Number]

[0120] Washing fastness In the investigation of washing fastness, individual dyed hair streaks were placed in a shaking bath (100 rpm) at 40 °C containing 10 wt% sodium lauryl sulfate for 30 minutes. This treatment simulated 20 shampoo cycles. After this shaking bath treatment, each streak was washed with warm water for 1 minute and blow-dried. The above-mentioned color density of this dried streak was measured, and ΔE*ab was calculated. Furthermore, ΔΔE*ab was calculated as the difference between ΔE*ab immediately after dyeing and ΔE*ab after the fastness test.

[0121] Stability test The stability of each composition was evaluated by a storage test under determined conditions of 40 °C for 2 weeks. These compositions were visually evaluated by an inspector.

[0122] pH measurement All pH measurements of the composition of the present invention were performed with a glass electrode calibrated at 25 °C under atmospheric pressure.

[0123] The following examples belong to the scope of the present invention.

[0124] Example 24 Composition A wt% HC Blue 18 0.1 HC Red 18 0.05 HC Yellow 16 0.08 Monoethanolamine 2.0 Benzyl alcohol 3.0 Xanthan gum 0.30 NaOH / HCl Adjusted to pH 9.0 Water To a total of 100.0

[0125] Composition B wt% Guanidine sulfate 3.0 Mineral oil 1.0 Cetearyl alcohol 1.0 Sodium lauryl sulfate 0.5 Phosphoric acid Adjusted to pH 3.0 Hydrogen peroxide 6.0 Water To a total of 100.0

[0126] Mix Composition A and Composition B in a weight ratio of 1:1 to make the pH 8 - 9.

[0127] Example 25 Composition A wt% HC Blue 18 0.1 HC Red 18 0.05 HC Yellow 16 0.08 Monoethanolamine 2.0 Benzyl alcohol 3.0 Xanthan gum 0.30 NaOH / HCl Adjusted to pH 9.0 Water To a total of 100.0

[0128] Composition B wt% Guanidine sulfate 3.0 Mineral oil 1.0 Cetearyl alcohol 1.0 Sodium lauryl sulfate 0.5 Phosphoric acid Adjusted to pH 3.0 Hydrogen peroxide 6.0 Water To a total of 100.0

[0129] Composition C wt% Potassium persulfate 25.0 Sodium persulfate 25.0 Sodium metasilicate 15.0 Diatomaceous earth Total amount 100.0

[0130] Mix Composition A, Composition B and Composition C at a weight ratio of 1:1:0.2 to adjust the pH to about 9 - 9.5.

Claims

1. A kit of parts comprising two or more independent compositions for dyeing keratin fibers, - one of the independent compositions being Composition A containing one or more direct dyes and one or more alkaline agents, - one of the independent compositions being Composition B which is an aqueous composition having a pH of 1 or more and less than 6, a) one or more guanidine compounds selected from guanidine carbonate, guanidine sulfate, and salts thereof, with the total concentration in Composition B calculated based on the total weight of Composition B being 0.1% by weight or more and 3% by weight or less, b) cetearyl alcohol and / or mineral oil, with the total concentration in Composition B calculated based on the total weight of Composition B being 1% by weight or more and 4% by weight or less, and c) optionally one or more oxidizing agents being Composition B containing them, characterized in that each component is mixed immediately before application to keratin fibers, a kit of parts.

2. The kit of parts according to claim 1, characterized in that Composition A and / or B does not contain peroxyacid salts and / or persulfates.

3. The kit of parts according to claim 1 or 2, characterized in that at least one direct dye in Composition A is selected from HC Blue 18, HC Red 18, and HC Yellow 16, and mixtures thereof.

4. The kit of parts according to any one of claims 1 to 3, characterized in that Composition A is an aqueous composition, a non-aqueous liquid composition, or a powder composition.

5. The kit of parts according to any one of claims 1 to 4, characterized in that the total concentration of the direct dye in Composition A calculated based on the total weight of Composition A is 0.01% by weight to 10% by weight.

6. The kit of parts according to any one of claims 1 to 4, characterized in that the total concentration of the direct dye in Composition A calculated based on the total weight of Composition A is 0.25% by weight to 5% by weight.

7. The kit of parts according to any one of claims 1 to 6, characterized in that the compound of a) in Composition B is guanidine sulfate.

8. The kit of parts according to any one of claims 1 to 7, characterized in that Composition B contains the compound of c).

9. The kit of parts according to any one of claims 1 to 8, characterized in that Composition B further contains one or more surfactants as the compound of d).

10. A kit of parts according to any one of claims 1 to 9, characterized in that the pH of composition B is from 2 to 5.

11. A kit of parts according to any one of claims 1 to 10, further comprising a composition C containing one or more peroxyacid salts and / or persulfates.

12. A three-part dyeing composition comprising a composition A as defined in any one of claims 1 to 6, a composition B as defined in any one of claims 1 and 7 to 10, and a composition C as defined in claim 11.

13. A method of dyeing keratin fibers, comprising the following steps: i) providing a composition A as defined in any one of claims 1 to 6; ii) providing a composition B as defined in any one of claims 1 and 7 to 10; iii) optionally providing a composition C as defined in claim 11; iv) mixing the compositions of steps i), ii) and optionally iii) immediately before use to produce a ready-to-use composition having a pH of from 7 to 12; v) applying the ready-to-use composition to the keratin fibers for from 1 minute to 60 minutes; vi) optionally rinsing the keratin fibers. A method comprising the above steps.

14. Use of a composition as defined as composition B in any one of claims 1 and 7 to 10, for improving the color strength and / or wash fastness of one or more direct dyes in keratin fibers, provided that composition B is mixed with a composition A as defined in any one of claims 1 to 6 immediately before application to the keratin fibers.

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