Dyeing composition, dyeing method, its use, and kit of parts of the dyeing composition

Abstract

The present invention relates to dyeing compositions, dyeing methods, and uses and kits thereof, which improve dyeing with certain direct dyes.The compositions of the present invention comprise benzyl alcohol and a thickening polymer.

Description

Technical Field

[0001] The present invention relates to a composition for dyeing keratin fibers, a dyeing method, its use, and a kit of parts for dyeing.

Background Art

[0002] Direct dyes are generally used to color keratin fibers. Such dyes are advantageous over oxidative dyes in that they cause less damage to keratin fibers during the dyeing process. When direct dyes are used, the appearance after dyeing, especially after repeated dyeing, is more aesthetically appealing.

[0003] A common problem with direct dyes is the insufficient dyeability of keratin fibers, which becomes a problem especially when a dark color tone is desired. The prior art has addressed this problem, but satisfactory solutions have only been obtained partially.

[0004] Patent Document 1 discloses a bleach / color composition containing a direct dye in a non-aqueous composition. This composition is subsequently mixed with an oxidative composition and an oxidizable solvent, but the present invention relates to an alkaline non-oxidative aqueous composition containing a specific direct dye.

[0005] Patent Documents 2 and 3 disclose the combination of the HC dyes of the present invention and benzyl alcohol. However, Patent Documents 2 and 3 do not disclose the presence of a thickening polymer. Patent Document 4 discloses HC Blue 18 in an aqueous dyeing composition containing benzyl alcohol. However, this disclosed composition does not contain a thickening polymer.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

[0007] The first object of the present invention is a non-oxidizing aqueous composition having a pH in the range of 7 to 12 for dyeing keratin fibers, preferably human keratin fibers, more preferably human hair, comprising: - one or more direct dyes selected from HC Red 18, HC Blue 18, HC Yellow 16 and / or mixtures thereof, - one or more thickening polymers selected from nonionic thickening polymers and / or anionic thickening polymers and / or mixtures thereof, - one or more alkali agents, and - benzyl alcohol a composition containing them.

[0008] The second object of the present invention is a two-component dyeing composition for keratin fibers, comprising a composition defined above as the first part and an acidic aqueous composition containing one or more guanidine compounds and / or salts thereof as the second part.

[0009] The 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: a) providing the first non-oxidizing aqueous composition defined above, b) providing the second acidic aqueous composition defined above, c) mixing the composition of step a) and the composition of step b) to obtain a ready-to-use composition having a pH of 7 to 12, d) applying this ready-to-use composition to keratin fibers and leaving it for 1 minute to 60 minutes, e) optionally rinsing the keratin fibers. A method comprising the following.

[0010] A fourth object of the present invention is a method for dyeing keratin fibers, preferably human keratin fibers, more preferably human hair, comprising the following steps: f) Applying the composition defined above to the keratin fibers and leaving for between 1 minute and 60 minutes, g) Optionally rinsing the keratin fibers and optionally drying the keratin fibers, A method comprising the following.

[0011] A fifth object of the present invention is the use of the composition defined above for dyeing keratin fibers, preferably human keratin fibers, more preferably human hair.

[0012] A sixth object of the present invention is a kit of parts comprising a separately packed first composition defined above, a separately packed second acidic aqueous composition defined above and optionally an oxidizing agent.

DETAILED DESCRIPTION OF THE INVENTION

[0013] The inventors of the present invention have unexpectedly found that an alkaline aqueous composition containing a specific direct dye, an alkaline agent, a thickening polymer and benzyl alcohol provides a deep and intense coloration to keratin fibers while achieving a beautiful and shiny tone without causing significant damage to the keratin fibers.

[0014] Composition for dyeing keratin fibers The composition of the present invention is a non-oxidizing aqueous composition having a pH in the range of 7 to 12 for dyeing keratin fibers, preferably human keratin fibers, more preferably human hair, - One or more direct dyes selected from HC Red 18, HC Blue 18, HC Yellow 16 and / or mixtures thereof, - One or more thickening polymers selected from nonionic thickening polymers and / or anionic thickening polymers and / or mixtures thereof, - At least one alkali agent, and - Benzyl alcohol It is a composition containing.

[0015] "Non-oxidizing" means that the bleach compound content of the composition of the present invention is 1% by weight or less, preferably that the composition of the present invention does not contain a bleach compound.

[0016] The bleach compound is, for example, a peracid salt and / or a peroxyacid salt of an alkali metal or an alkaline earth metal.

[0017] From the viewpoint of non-oxidizing, the content of the oxidation dye precursor and / or the oxidation dye coupler in the composition of the present invention is preferably 1% by weight or less, more preferably does not contain an oxidation dye precursor and / or an oxidation dye coupler.

[0018] From the viewpoint of reducing damage to keratin fibers, preferably human keratin fibers, more preferably human hair, the pH of the present composition is preferably 8 to 11, more preferably 8.5 to 10.

[0019] Hair direct dye One or more direct dyes of the composition of the present invention are selected from HC Red 18, HC Blue 18, HC Yellow 16 and / or mixtures thereof.

[0020] Preferably, from the viewpoint of imparting a sufficient color density to keratin fibers, the total concentration of the direct dye calculated based on the total weight of the composition is 0.05% by weight or more, more preferably 0.1% by weight or more, still more preferably 0.2% by weight or more.

[0021] Preferably, from the viewpoints of imparting a sufficient color density to keratin fibers and product cost, the total concentration of the direct dye calculated based on the total weight of the composition is 10% by weight or less, more preferably 5% by weight or less, still more preferably 3% by weight or less.

[0022] To achieve the above effects, the total concentration of the direct dye calculated based on the total weight of the composition is preferably 0.05% by weight to 10% by weight, more preferably 0.1% by weight to 5% by weight, and still more preferably 0.2% by weight to 3% by weight.

[0023] Thickening polymer The composition of the present invention contains one or more thickening polymers selected from nonionic thickening polymers and / or anionic thickening polymers and / or mixtures thereof.

[0024] This thickening polymer is preferably selected from polymers that produce an aqueous solution and / or an aqueous dispersion having a viscosity of at least 5,000 mPa·s at pH 8 to 10. This viscosity is measured at 25°C with a Brookfield viscometer equipped with an appropriate spindle (for example, rotating 10 times per minute) at a polymer concentration of 1% by weight in water at 25°C and is calculated based on the total weight of the composition.

[0025] As the nonionic thickening polymer, a cellulose-based polymer is suitable. Suitable examples of cellulose-based polymers include methyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl-methyl cellulose, and alkylated hydroxyl cellulose ((C2-C8)-alkyl cellulose, cetyl hydroxyethyl cellulose, etc.).

[0026] Suitable anionic thickening polymers are selected from natural anionic polymers and / or synthetic anionic polymers.

[0027] Preferably, this natural anionic polymer can be selected from xanthan gum, dehydroxanthan gum, hydroxypropyl xanthan gum, carboxymethyl cellulose, starch-based polymers (such as plant-derived starch), and / or their synthetic modified derivatives (such as hydroxypropyl starch phosphate). Similarly preferred natural anionic polymers are alginic acid, sodium alginate, ammonium alginate, calcium alginate, gum arabic, and guar gum.

[0028] From the viewpoints of biodegradability and low environmental impact, the thickening polymer preferred for the composition of the present invention is a natural anionic polymer, more preferably xanthan gum and / or dehydroxanthan gum.

[0029] Preferably, from the viewpoint of providing sufficient viscosity to the composition, the total concentration of the thickening polymer of the present invention calculated based on the total weight of the composition is 0.1% by weight or more, more preferably 0.25% by weight or more, still more preferably 0.5% by weight or more.

[0030] Preferably, from the viewpoints of providing sufficient viscosity to the composition and product cost, the total concentration of the thickening polymer of the present invention calculated based on the total weight of the composition is 15% by weight or less, more preferably 12% by weight The following , still more preferably 10% by weight or less.

[0031] To achieve the above effects, the total concentration of the thickening polymer of the composition of the present invention calculated based on the total weight of the composition is preferably 0.1% by weight to 15% by weight, more preferably 0.25% by weight to 12% by weight, still more preferably 0.5% by weight to 10% by weight.

[0032] Alkali agent The composition of the present invention contains one or more alkali agents. Suitable alkali agents are ammonia and / or its salts, guanidine and / or its salts, and / or the general structural formula

[0033]

Chemical formula

[0034] [In the formula, R1, R2 and R3 are each independently H, linear C1-C6 alkyl which may be substituted with one hydroxyl group, and branched C3-C 12 alkyl and alkanol, and at least one of R1, R2 and R3 is not H and / or its salt.] It is an organic alkylamine and / or alkanolamine and / or a salt thereof represented by

[0035] The organic alkylamine and / or alkanolamine 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, aminomethylpropanol, monoethylamine, diethylamine and triethylamine. Similarly preferred are salts of alkyl and / or alkanolamines in which the counter ion is preferably selected from chloride ion and / or hydrogen chloride, nitrate ion, sulfate ion, phosphate ion, hydrogen phosphate ion, dihydrogen phosphate ion, citrate ion, acetate ion, sulfite ion, benzoate ion and salicylate ion.

[0036] From the viewpoint of providing sufficient alkalinity, the alkali agent is preferably selected from ammonia and / or its salt, organic amine, alkanolamine and / or a mixture thereof.

[0037] From the viewpoint of dyeing efficiency, the most preferred alkali agent is ammonia and / or its salt.

[0038] Preferably, from the viewpoint of providing sufficient alkalinity and dyeing efficiency, the total concentration of the alkali agent calculated based on the total weight of the composition is 1% by weight or more, more preferably 2% by weight or more, still more preferably 3% by weight or more.

[0039] Preferably, from the viewpoint of reducing hair damage, the total concentration of the alkali agent calculated based on the total weight of the composition is 20% by weight or less, more preferably 15% by weight or less, still more preferably 12% by weight or less.

[0040] To achieve the above effects, the total concentration of the alkali agent calculated based on the total weight of the composition is preferably 1% by weight to 20% by weight, more preferably 2% by weight to 15% by weight, still more preferably 3% by weight to 12% by weight.

[0041] Benzyl alcohol From the viewpoint of improving the penetration of the dye into the hair fiber, the composition of the present invention contains benzyl alcohol.

[0042] Preferably, from the viewpoint of dyeing efficiency, the total concentration of benzyl alcohol calculated based on the total weight of the composition is 1% by weight or more, more preferably 2% by weight or more, still more preferably 3% by weight or more.

[0043] Preferably, from the viewpoints of dyeing efficiency and product cost, the total concentration of benzyl alcohol calculated based on the total weight of the composition is 12% by weight or less, more preferably 10% by weight or less, still more preferably 8% by weight or less.

[0044] Preferably, to achieve the above effects, the total concentration of benzyl alcohol calculated based on the total weight of the composition is 1% by weight to 12% by weight, more preferably 2% by weight to 10% by weight, still more preferably 3% by weight to 8% by weight.

[0045] Viscosity From the viewpoints of improving the uptake of the dye and preventing dripping from keratin fibers, the absolute viscosity of the present composition as measured by cone plate viscosity at 25°C is preferably 10,000 mPa·s to 50,000 mPa·s. The viscosity measurement is performed, for example, using a Brookfield viscometer and a #5 spindle, and the shear rate is preferably 10 rpm.

[0046] Preferably, from the viewpoint of providing viscosity as a product, the viscosity of the composition of the present invention as measured by cone plate viscosity at 25°C is 12,500 mPa·s or more, more preferably 15,000 mPa·s or more.

[0047] Preferably, from the viewpoints of providing viscosity as a product and ease of application to keratin fibers, the viscosity of the composition of the present invention as measured by cone plate viscosity at 25°C described above is 45,000 mPa·s or less, more preferably 40,000 mPa·s or less.

[0048] To achieve the above effects, the viscosity of the composition of the present invention as measured by cone plate viscosity at 25°C described above is preferably 12,500 mPa·s to 45,000 mPa·s, and more preferably 15,000 mPa·s to 40,000 mPa·s.

[0049] Product shape The composition of the present invention is preferably in any shape that facilitates application to keratin fibers.

[0050] From the viewpoint of the appearance as a cosmetic, the present composition is preferably in a gel form, more preferably a gel shape with translucency (determined by observing a 1 cm thickness of the present composition with the naked eye of a human).

[0051] In other embodiments, the composition of the present invention is a gel emulsion containing one or more hydrophobic compounds, such as aliphatic alcohols, fatty acid esters, triglycerides, mineral oils and / or mixtures thereof. A suitable concentration of the hydrophobic compound calculated based on the total weight of the composition is 1 wt% to 20 wt%, preferably 2 wt% to 15 wt%. The present composition preferably contains one or more surfactants for the purpose of emulsification. The surfactant can be selected from the list of surfactants shown below.

[0052] Surfactant In one embodiment of the present invention, the present composition contains one or more surfactants.

[0053] Suitable surfactants include anionic, nonionic, cationic and / or zwitterionic / amphoteric surfactants and / or mixtures thereof.

[0054] Preferably, the anionic surfactant can 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.

[0055] Suitable examples include alkyl sulfate (or preferably ethoxylated alkyl ether sulfate) surfactants with an alkyl chain length of C 10 ~C 22 or mixtures thereof.

[0056] Suitable nonionic surfactants can be selected from alkyl polyglycosides, ethoxylated triglycerides, ethoxylated aliphatic alcohols, ethoxylated fatty acid esters and / or mixtures thereof.

[0057] Suitable cationic surfactants include quaternary ammonium surfactants with a carbon chain length of C 12 ~C 22 or tertiary amine groups and C 12 ~C 22Surfactants having at least one alkyl chain in the carbon chain (such as alkylamide alkylamine surfactants) can be mentioned. A preferred example is cetrimonium chloride.

[0058] Suitable 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 relates to salts of these compounds.

[0059] From the viewpoint of improving the wettability of keratin fibers, the concentration of the surfactant calculated based on the total weight of the composition is preferably 0.1% by weight to 10% by weight.

[0060] Two-component composition The present invention also relates to a two-component dyeing composition for keratin fibers, comprising the composition defined above as the first part and an acidic aqueous composition containing one or more guanidine compounds and / or salts thereof as the second part.

[0061] Preferably, from the viewpoints of safety as a cosmetic and miscibility with the first composition, the pH of the second acidic aqueous composition is 1 to 6, more preferably 2 to 5, and even more preferably 2.5 to 4.5.

[0062] Preferably, from the viewpoint of improving the color strength of keratin fibers, the guanidine compound and / or its salt is selected from guanidine, guanidine carbonate, guanidine hydrochloride, guanidine sulfate, guanidine phosphate and / or mixtures thereof. From the viewpoints of improving the color strength of keratin fibers and the washing fastness of direct dyes, guanidine sulfate is most preferred as the guanidine compound and / or its salt.

[0063] From the perspective of improving the color intensity of keratin fibers, preferably, the total concentration of the guanidine compound and / or its salt calculated based on the total weight of the composition is 0.1% by weight or more, preferably 0.5% by weight or more, more preferably 1% by weight or more.

[0064] From the perspectives of improving the color intensity of keratin fibers and the solubility of the compound, it is preferable that the total concentration of the guanidine compound and / or its salt calculated based on the total weight of the composition is 10% by weight or less, preferably 8% by weight or less, more preferably 6% by weight or less.

[0065] To achieve the above effects, preferably, the total concentration of the guanidine compound and / or its salt calculated based on the total weight of the composition 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.

[0066] Preferably, from the perspective of imparting luster to keratin fibers, the second acidic composition can contain one or more oxidizing agents, more preferably hydrogen peroxide.

[0067] From the perspective of imparting luster to keratin fibers, the appropriate concentration of one or more oxidizing agents (preferably hydrogen peroxide) in the second acidic composition calculated based on the total weight of the second acidic composition is 1% by weight or more, preferably 2% by weight or more, more preferably 3% by weight or more.

[0068] From the perspectives of imparting luster to keratin fibers and the safety of the cosmetic, the appropriate concentration of one or more oxidizing agents (preferably hydrogen peroxide) in the second acidic composition calculated based on the total weight of the second acidic composition is 20% by weight or less, preferably 15% by weight or less, more preferably 12% by weight or less.

[0069] The appropriate concentration of one or more oxidizing agents (preferably hydrogen peroxide) in the second acidic composition calculated based on the total weight of the second acidic composition is 1% by weight to 20% by weight, preferably 2% by weight to 15% by weight, more preferably 3% by weight to 12% by weight.

[0070] From the viewpoints of compatibility as a cosmetic and imparting a conditioning effect, the second acidic aqueous composition is preferably an oil-in-water emulsion containing one or more hydrophobic compounds. As the hydrophobic compound, an aliphatic alcohol, a fatty acid ester, a triglyceride, a mineral oil and / or a mixture thereof are preferable. This composition preferably contains one or more surfactants for the purpose of emulsification. The surfactant can be selected from the list of surfactants shown above.

[0071] Dyeing method The present invention also relates to a method for dyeing keratin fibers, preferably human keratin fibers, more preferably human hair, comprising the following steps: a) providing the first non-oxidizing aqueous composition defined above; b) providing the second acidic aqueous composition defined above; c) mixing the composition of step a) and the composition of step b) to obtain an immediately usable composition having a pH of 7 to 12; d) applying the immediately usable composition to the keratin fibers and leaving it for 1 to 60 minutes; e) optionally rinsing the keratin fibers; and relates to a method comprising the above steps.

[0072] The aqueous composition of step b) is preferably an oil-in-water emulsion containing one or more hydrophobic compounds. As the hydrophobic compound, an aliphatic alcohol, a fatty acid ester, a triglyceride, a mineral oil and / or a mixture thereof are preferable. This composition preferably contains one or more surfactants for the purpose of emulsification. The surfactant can be selected from the list of surfactants shown above.

[0073] In one aspect of the present invention, from the viewpoint of improving dyeing performance, the aqueous composition of step b) contains one or more guanidine compounds and / or salts thereof.

[0074] When only dyeing of keratin fibers is desired, the aqueous composition of step b) does not contain an oxidizing agent.

[0075] When it is desired to impart luster to keratin fibers, the aqueous composition in step b) contains one or more oxidizing agents.

[0076] For the latter purpose, from the viewpoints of imparting luster to hair and the safety as a cosmetic, hydrogen peroxide is preferable as the oxidizing agent, and its concentration is as described above for the second acidic composition.

[0077] The composition in step a) and the composition in step b) are mixed to obtain a composition that can be used immediately and has a pH of 7 to 12. From the viewpoints of hair damage and dyeing strength, the pH of the composition that can be used immediately is preferably 8 to 11, more preferably 8.5 to 10.5.

[0078] Preferably, the composition that can be used immediately is left on the keratin fibers for 1 minute to 60 minutes. From the viewpoint of the economy of the process, it is left on the keratin fibers for 2 minutes to 45 minutes, more preferably 5 minutes to 30 minutes.

[0079] From the viewpoint of the safety as a cosmetic, the composition that can be used immediately is preferably washed off in step e).

[0080] However, if the composition in step b) does not contain an oxidizing agent, it is not necessary to wash off the composition that can be used immediately in step e).

[0081] The present invention also relates to a method for dyeing keratin fibers, preferably human keratin fibers, more preferably human hair, comprising the following steps: f) applying the composition defined above to the keratin fibers and leaving it for 1 minute to 60 minutes, g) optionally rinsing the keratin fibers and optionally drying the keratin fibers, and a method comprising the above.

[0082] From the viewpoints of dyeing strength and hair damage, preferably, the pH of the composition in step f) is from 7 to 12, more preferably from 8 to 11, and still more preferably from 8.5 to 10.5.

[0083] The composition in step f) is preferably left on the keratin fibers for between 1 minute and 60 minutes. From the viewpoint of the economics of the process, the composition is left on the keratin fibers for 2 minutes to 45 minutes, more preferably from 5 minutes to 30 minutes.

[0084] Use of the composition The present invention also relates to the use of the composition as defined above for dyeing keratin fibers, preferably human keratin fibers, more preferably human hair. As will be explained in the examples of the present invention, the composition of the present invention increases the uptake of direct dyes by keratin fibers.

[0085] Kit of parts The present invention also relates to a kit of parts comprising a first composition, defined above as the composition of the present invention, independently packaged, and a second acidic aqueous composition, independently packaged, optionally containing an oxidizing agent.

[0086] The second composition is preferably a composition as defined as the second acidic composition of a two-component dyeing composition.

[0087] When an oxidizing agent is present in the second acidic composition, the oxidizing agent is preferably hydrogen peroxide.

[0088] Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited thereto.

Examples

[0089] Each hair dye was dissolved in water containing aqueous ammonia. Thereafter, benzyl alcohol and a thickening polymer (when contained) were added under constant stirring. The pH was adjusted in the final step.

[0090]

Table 1

[0091] The absolute viscosities of the composition of Example 1 and the composition of Comparative Example 2 were about 20,000 mPa·s. The absolute viscosities of the other two compositions were 500 to 1,000 mPa·s.

[0092] Examination of Results From the L* values of each example shown in Table 1, Example 1 and Comparative Example 1 showed comparable dye uptake, while the other two compositions had lower dye uptake. For black dyeing, a lower L* value is excellent, indicating a color closer to black. Example 1 showed the lowest C* value among all examples and comparative examples. The ideal C* value for black hair is 0. Therefore, the lower the C* value, the closer it is to black. For this reason, Example 1 of the present invention is superior to the comparative examples.

[0093] 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 Dual Senses Color Shampoo), thoroughly rinsed, and completely air-dried. After the hair streaks were completely air-dried, the color of the hair was measured by spectroscopic analysis using a DataColor 45G CT (DataColor, Lawrenceville, NJ, USA). Measurements were taken at 5 points per hair streak and averaged (a1, b1).

[0094] Next, 1 g of each of the above example compositions was applied to the hair streaks, massaged for 1 minute, and then allowed to rest for 15 minutes. Then, the streaks were washed with lukewarm water for 1 minute and dried with a blow dryer. The hair streaks were combed with a comb, and the color was measured at 5 different points per hair streak (a2, b2). Based on the CIE*Lab color space obtained by the measurement, the C* value and h value regarding the color difference are calculated by the following formulas.

[0095]

Equation

[0096] Viscosity measurement 50 g of each of the above compositions was placed in a tall, narrow beaker and subjected to viscosity measurement using a Brookfield viscometer and spindle #5. The shear rate at 25°C was 10 rpm. The measurement was carried out for 1 minute, and the measured value of the absolute viscosity was obtained after 1 minute of shear. The average value of three measurements was described.

[0097]

Table 2

[0098] Examination of results Each experiment shown in Table 2 was recorded at different pH values. The situation of the L* values of the examples in Table 2 was the same as in Table 1, and the examples showed similar dye uptake. The examples in Table 2 showed lower C* values compared to the comparative examples. The ideal C* value for black hair is 0. Therefore, the lower the C* value, the closer it is to black. a* and b* are said to also indicate a visual color shift. The higher the a*, the redder the hair looks, and the higher the b*, the yellower the hair streak looks. Therefore, it is particularly desirable that these values are low because black hair consumers do not desire the appearance of red or yellow tones.

[0099] Method The same method as the examples in Table 1 was adopted.

[0100] The following examples are included within the scope of the present invention.

[0101] Example 9 First part Weight % HC Blue 18 1.0 HC Yellow 16 0.08 HC Red 18 0.05 Monoethanolamine 5.0 Hydroxypropyl xanthan gum 0.5 Benzyl alcohol 3.0 Propylene glycol 3.0 An appropriate amount to adjust the pH to 9.5 with NaOH / HCl Water, making the total amount 100.0

[0102] Second acidic part wt% Guanidine sulfate 3.0 An appropriate amount to adjust the pH to 3.5 with NaOH / HCl Water, making the total amount 100.0

[0103] Mix the first composition and the second acidic composition in a weight ratio of 1:1. The second acidic composition may additionally contain hydrogen peroxide in an amount of 1 wt% to 20 wt% (based on the total weight of the second acidic composition).

[0104] Example 10 First part wt% HC Blue 18 0.1 HC Yellow 16 0.1 HC Red 18 0.25 Ammonia (effective amount 24.5%) 8.0 Xanthan gum 4.0 Hydroxyethyl cellulose 0.5 Benzyl alcohol 6.0 Mineral oil 8.0 Sodium lauryl sulfate 1.5 Ceteareth-30 1.0 An appropriate amount to adjust the pH to 9.5 with NaOH / HCl Water, making the total amount 100.0

[0105] Second acidic part wt% Guanidine sulfate 3.0 Guanidine hydrochloride 1.0 An appropriate amount to adjust the pH to 2.5 with NaOH / HCl Water, making the total amount 100.0

[0106] Mix the first composition and the second acidic composition in a weight ratio of 1:1. The second acidic composition may additionally contain hydrogen peroxide in an amount of 1 wt% to 20 wt% (based on the total weight of the second acidic composition).

Claims

1. A non-oxidizing aqueous composition having a pH in the range of 8.5 to 10 for dyeing keratin fibers, comprising: - 0.45% by weight or more and 3% by weight or less of direct dyes of HC Red 18, HC Blue 18, and HC Yellow 16, - 2% by weight or more and 10% by weight or less of one or more thickening polymers selected from xanthan gum, hydroxyethyl cellulose, and hydroxyethyl acrylate / sodium acryloyldimethyltaurate copolymer, - one or more alkali agents, and - 3% by weight or more and 8% by weight or less of benzyl alcohol.

2. The composition according to claim 1, comprising 1% by weight or less of a bleach compound.

3. The composition according to claim 1 or 2, comprising 1% by weight or less of an oxidation dye precursor and / or an oxidation dye coupler.

4. The composition according to claim 1 or 2, characterized by not containing an oxidation dye precursor and / or an oxidation dye coupler.

5. The composition according to any one of claims 1 to 4, having an absolute viscosity in the range of 10,000 mPa·s to 50,000 mPa·s as measured by a cone plate viscosity measurement at 25°C.

6. The composition according to any one of claims 1 to 5, which is gel-like.

7. The composition according to any one of claims 1 to 6, which is a translucent gel-like composition determined by observing a 1 cm thickness of the composition with the naked eye of a human.

8. The composition according to any one of claims 1 to 7, wherein the alkali agent is selected from ammonia or its salts, organic alkyl or alkanolamines or their salts, and mixtures thereof.

9. The composition according to any one of claims 1 to 8, wherein the total concentration of the alkali agent calculated based on the total weight of the composition is 1% by weight to 20% by weight.

10. The composition according to any one of claims 1 to 9, which is a gel emulsion containing one or more hydrophobic compounds.

11. A two-component dyeing composition for keratin fibers, comprising a composition defined in any one of claims 1 to 10 as a first part, and an acidic aqueous composition containing one or more guanidine compounds and / or their salts, and optionally hydrogen peroxide as a second part.

12. A method for dyeing keratin fibers, comprising the following steps: a) providing a first non-oxidizing aqueous composition as defined in any of claims 1 to 10; b) providing a second acidic aqueous composition as defined as a second part in claim 11; c) mixing the composition of step a) and the composition of step b) to obtain a ready-to-use composition having a pH of 8.5 to 10; d) applying the ready-to-use composition to keratin fibers and leaving it for 1 minute to 60 minutes; e) optionally rinsing the keratin fibers; A method comprising:

13. The method according to claim 12, characterized in that the composition of step b) is an oil-in-water emulsion.

14. A method for dyeing keratin fibers, comprising the following steps: f) applying the composition as defined in any of claims 1 to 10 to keratin fibers and leaving it for 1 minute to 60 minutes; g) optionally rinsing the keratin fibers and optionally drying the keratin fibers; A method comprising:

15. Use of a composition as defined in any of claims 1 to 10 for dyeing keratin fibers.

16. A kit of parts comprising a first composition as defined in any of claims 1 to 10, packaged separately, and a second acidic aqueous composition, packaged separately and optionally containing an oxidizing agent.

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