Method for colouring keratin fibers

Abstract

The present invention relates to a method of coloring keratin fibers, especially human hair, which delivers intensive, long lasting, brilliant colors and provides improved grey coverage. Kit therefore is disclosed as well. The method of colouring hair involves treating hair prior to colouring with an alkaline reducing agent.

Claims

1. A method for coloring keratin fibers, the method comprising: a—applying Composition A onto hair and leaving the Composition A on the hair for a period of 1 minute to 30 minutes, wherein the Composition A is an alkaline aqueous composition having a pH in the range of 8 to 10 and comprising one or more reducing agents and one or more alkalizing agents selected from the compounds according to general structure
R4R5R6N wherein R4, R5 and R6 are same or different H, C1 to C4 alkyl, C3 to C4 unsaturated alkyl, C3 to C4 branched alkyl, C1 to C4 hydroxy alkyl, C3 to C4 unsaturated hydroxy alkyl, and C3 to C4 branched hydroxy alkyl, present at a total concentration of 0.25 to 10%, by weight calculated to a total of the Composition A; b—rinsing the Composition A off the hair with water and towel drying; c—applying Composition B onto the rinsed hair and leaving the Composition B on the rinsed hair for a period of 1 minute to 45 minutes at a temperature from 20 to 45° C., the Composition B is an aqueous composition comprising one or more hair dyes; d—rinsing the Composition B off the rinsed hair with water; g—optionally, washing the twice rinsed hair with a cleansing composition or treating the twice rinsed hair with an aqueous composition comprising hydrogen peroxide at a concentration 0.1 to 3%, by weight calculated to a total of the aqueous composition for a period of 1 minute to 10 minutes, and rinsing the aqueous composition off the twice rinsed hair; and e—towel drying and drying the thrice rinsed hair.

2. The method of claim 1, wherein the Composition A has a pH in the range of 8 to 9.9.

3. The method of claim 1, wherein the one or more reducing agents is selected from thiogylcolic acid and/or its salts, cysteamine and/or its salts, thioglycerin and/or its salts, glycerin esters of thioglycolic acid and/or its salts, thiolactic acid and/or its salts, cysteine and/or its salts and sodium sulfite.

4. The method of claim 1, wherein the one or more reducing agents is selected from thioglycolic acid and/or its salts.

5. The method of claim 1, wherein the one or more hair dyes is selected from hair direct dyes and oxidative dyestuff precursors.

6. The method of claim 5, wherein the hair direct dyes are selected from one or more anionic direct dyes, one or more cationic dyes, and one or more neutral nitro dyes.

7. The method of claim 6, wherein the one or more anionic direct dyes is selected from 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, HC Blue 18, HC Red 18, HC yellow 16, and their alkali metal salts.

8. The method of claim 6, wherein the one or more cationic dyes is selected from 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, Natural Brown 7, Basic Green 1, Basic Red 2, Basic Red 12 Basic Red 22, Basic Red 76, Basic Violet 1, Basic Violet 2, Basic Violet 3, Basic Violet 10, Basic Violet 14, Basic Yellow 57, Basic red 51, Basic Yellow 87, Basic Orange 31, and HC Blue 17.

9. The method of claim 6, wherein the one or more neutral nitro dyes is selected from HC Blue No. 2, HC Blue No. 4, HC Blue No. 5, HC Blue No. 6, HC Blue No. 7, HC Blue No. 8, HC Blue No. 9, HC Blue No. 10, HC Blue No. 11, HC Blue No. 12, HC Blue No. 13, HC Brown No. 1, HC Brown No. 2, HC Green No. 1, HC Orange No. 1, HC Orange No. 2, HC Orange No. 3, HC Orange No. 5, HC Red BN, HC Red No. 1, HC Red No. 3, HC Red No. 7, HC Red No. 8, HC Red No. 9, HC Red No. 10, HC Red No. 11, HC Red No. 13, HC Red No. 54, HC Red No. 14, HC Violet BS, HC Violet No. 1, HC Violet No. 2, HC Yellow No. 2, HC Yellow No. 4, HC Yellow No. 5, HC Yellow No. 6, HC Yellow No. 7, HC Yellow No. 8, HC Yellow No. 9, HC Yellow No. 10, HC Yellow No. 11, HC Yellow No. 12, HC Yellow No. 13, HC Yellow No. 14, HC Yellow No. 15, 2-Amino-6-chloro-4-nitrophenol, picramic acid, 1,2-Diamino-4-nitrobenzol, 1,4-Diamino-2-nitrobenzol, 3-Nitro-4-aminophenol, 1-Hydroxy-2-amino-3-nitrobenzol, and 2-hydroxyethylpicramic acid.

10. The method of claim 1, wherein the one or more hair dyes is selected from HC Yellow 16, HC Blue 18 and HC Red 18.

11. The method of claim 1, wherein the Composition B has a pH in the range of 2 to 11.

12. The method of claim 1, wherein the composition B further comprises one or more alkalizing agents selected from compounds according to general structure
R4R5R6N wherein R4, R5 and R6 are same or different H, C1 to C4 alkyl, C3 to C4 unsaturated alkyl, C3 to C4 branched alkyl, C1 to C4 hydroxy alkyl, C3 to C4 unsaturated hydroxy alkyl and C3 to C4 branched hydroxy alkyl, at a total concentration of 0.25 to 10%, by weight calculated to a total of the Compositions B.

13. The method of claim 1, wherein the one or more alkalizing agents of the Composition A is selected from ammonia, monoethanolamine, diethanolamine, triethanolamine, monoethanol methylamine, monoethanoldimethylamine, diethanolmethylamine, monoethanolethylamine, monoethanoldiethylamine, diethanolethylamine, monoethanolpropylamine, monoethanoldipropylamine, diethanolpropylamine, monoethanolbutylamine, aminomethyl propanol, and diethanolbutylamine.

14. The method of claim 1, wherein Composition B further comprises one or more oxidizing agent present at a concentration in the range of 1 to 12% by weight, calculated to a total weight of the Composition B.

15. The method of claim 1, wherein at least one of the Composition A and the Composition B further comprises: one or more surfactants; one or more fatty alcohols; one or more thickening polymers; one or more sequestering agents; one or more fragrances; one or more fatty acids; one or more preservatives; one or more organic solvents; and one or more silicones.

16. The method of claim 1, wherein the Composition A has a pH in the range of 8 to 9.9.

Description

EXAMPLE 1

(1) TABLE-US-00001 Composition A % by weight Cetearyl alcohol 10 Oleyl alcohol 5 Ammonia 1.3 Thioglycolic acid 1.7 Ceteareth-20 1.0 EDTA 0.5 Fragrance 0.5 Water to 100

(2) pH of the above composition is 10.0.

(3) TABLE-US-00002 Composition B % by weight Carbomer 1.5 Mineral oil 3 Benzyl alcohol 4.3 PEG-40 hydrogenated castor oil 2 HC Yellow 10 0.1 HC Yellow 16 0.1 HC Blue 18 0.1 HC Red 18 0.1 EDTA 0.5 Fragrance 0.5 Water to 100

(4) The human hair was applied the Composition A and left on the hair for 5 min and rinsed off from hair. Subsequently, the Composition B was applied and left on the hair from 30 min at ambient temperature and rinsed off from hair and the hair was shampooed and towel dried and dried with a hair drier.

(5) For comparative purposes another hair streak was applied water and left on the hair for 5 min and afterwards rinsed off and subsequently, the Composition B was applied and left on the hair from 30 min and rinsed off from hair and the hair was shampooed and towel dried and dried with a hair drier.

(6) Hair colour was measured with a laboratory colorimeter as L, a and b values. And the color difference to the color of the hair prior to coloration was calculated with the following equation.
ΔE=SQRT(ΔL{circumflex over ( )}2+Δa{circumflex over ( )}2+Δb{circumflex over ( )}2)

(7) The following results were observed.

(8) TABLE-US-00003 L a b ΔE With pre-treatment 23 4.4 7.2 60.2 Without pre-treatment 33.6 6.8 15.9 49.5

(9) From the above results it is beyond any doubt that treating hair with the reducing composition resulted in intensive colouration of the hair (the lower the L value, the darker the colour) and larger colour difference was observed as expressed with higher ΔE value.

(10) In a parallel application after rinsing of the dyeing composition B from the hair, hair was treated with a composition comprising 1% by weight hydrogen peroxide and after rinsing off the hydrogen peroxide composition from the hair with water, hair was towel dried and dried with a hair drier. The above results were confirmed as well using the alternative process.

EXAMPLE 2

(11) TABLE-US-00004 Composition A % by weight Cetearyl alcohol 10 Oleyl alcohol 5 Aminomethylpropanol 3.2 Thioglycolic acid 1.7 Ceteareth-20 1.0 Hydroxyethylcellulose 0.5 EDTA 0.5 Fragrance 0.5 Water to 100

(12) pH of the above composition is 9.9.

(13) TABLE-US-00005 Composition B % by weight Cetearyl alcohol 10 Oleth-5 4 Oleic acid 5 Sodium cetearyl sulfate 1.3 Sodium lauryl sulphate 2 Ammonium hydroxide 5 p-toluene diamine sulfate 0.8 Resorcinol 0.3 m-aminophenol 0.1 4-amino-2-hydroxytoluene 0.1 EDTA 0.5 Fragrance 0.5 Water to 100

(14) The human hair was applied the Composition A and left on the hair for 4 min and rinsed off from hair. Subsequently, the Composition B was applied after mixing with an oxidizing composition comprising 6% by weight hydrogen peroxide at a weight ratio of 1:1, and left on the hair from 30 min at ambient temperature and rinsed off from hair and the hair was shampooed and towel dried and dried with a hair drier.

(15) For comparative purposes another hair streak was applied water and left on the hair for 4 min and afterwards rinsed off and subsequently, the Composition B was applied after mixing with an oxidizing composition comprising 6% by weight hydrogen peroxide at a weight ratio of 1:1, and left on the hair from 30 min at ambient temperature and rinsed off from hair and the hair was shampooed and towel dried and dried with a hair drier.

(16) Hair colour was measured and analysed as in Example 1.

(17) The following results were observed.

(18) TABLE-US-00006 L a b ΔE With pre-treatment 34 4.6 11 48.7 Without pre-treatment 36 5.2 13.4 46.1

(19) From the above results it is clear that treating hair with the reducing composition resulted in intensive colouration of the hair (the lower the L value, the darker the colour) and larger colour difference was observed as expressed with higher ΔE value.

EXAMPLE 3

(20) TABLE-US-00007 Composition A % by weight Cetearyl alcohol 10 Oleyl alcohol 5 Ammonia 1.3 Thioglycolic acid 1.7 Ceteareth-20 1.0 EDTA 0.5 Fragrance 0.5 Water to 100

(21) pH of the above composition is 10.0.

(22) TABLE-US-00008 Composition B % by weight Xanthan gum 2.5 PEG-9-Dimethicone 2 Propylene Carbonate 20 Alcohol 10 Lactic acid 5 Acid violet 43 0.25 Acid orange 7 0.2 Acid Yellow 3 0.1 EDTA 0.5 Fragrance 0.5 Water to 100

(23) The human hair was applied the Composition A and left on the hair for 5 min and rinsed off from hair. Subsequently, the Composition B was applied and left on the hair from 30 min and rinsed off from hair and the hair was shampooed and towel dried and dried with a hair drier.

(24) For comparative purposes another hair streak was applied water and left on the hair for 5 min and afterwards rinsed off and subsequently, the Composition B was applied and left on the hair from 30 min and rinsed off from hair and the hair was shampooed and towel dried and dried with a hair drier.

(25) Hair colour was measured with a laboratory colorimeter as L, a and b values. And the color difference to the color of the hair prior to coloration was calculated with equation given under Example 1.

(26) The following results were observed.

(27) TABLE-US-00009 L a b DE With pre-treatment 22 9.2 12 61.2 Without pre-treatment 30.6 8.6 10.4 52.8

(28) From the above results it is beyond any doubt that treating hair with the reducing composition resulted in intensive colouration of the hair (the lower the L value, the darker the colour) and larger colour difference was observed as expressed with higher DE value.

EXAMPLE 4

(29) TABLE-US-00010 Composition A % by weight Cetearyl alcohol 10 Oleyl alcohol 5 Monoethanolamine 4.6 Thioglycolic acid 1.7 Cetrimonium chloride 1.0 EDTA 0.5 Fragrance 0.5 Water to 100

(30) pH of the above composition is 10.0.

(31) TABLE-US-00011 Composition B % by weight Cetearyl alcohol 2 Behentrimonium chloride 1 Phenoxyethanol 2 Basic yellow 57 1 HC blue 11 0.5 EDTA 0.5 Fragrance 0.5 Water to 100

(32) The human hair was applied the Composition A and left on the hair for 3 min and rinsed off from hair. Subsequently, the Composition B was applied and left on the hair from 30 min and rinsed off from hair and the hair was shampooed and towel dried and dried with a hair drier.

(33) For comparative purposes another hair streak was applied water and left on the hair for 5 min and afterwards rinsed off and subsequently, the Composition B was applied and left on the hair from 30 min and rinsed off from hair and the hair was shampooed and towel dried and dried with a hair drier.

(34) Hair colour was measured with a laboratory colorimeter as L, a and b values. And the color difference to the color of the hair prior to coloration was calculated as in example 1.

(35) The following results were observed.

(36) TABLE-US-00012 L a b DE With pre-treatment 44 −2 21 39.4 Without pre-treatment 61 −2 23 23.8

(37) From the above results it is beyond any doubt that treating hair with the reducing composition resulted in intensive colouration of the hair (the lower the L value, the darker the colour) and larger colour difference was observed as expressed with higher ΔE value.

(38) Similar results were observed as in the Examples 1 to 4 with the following hair colouring compositions when used in combination with the Compositions A of the Examples 1 to 4 and according to the process as described under each of the Examples 1 to 4.

EXAMPLE 5

(39) TABLE-US-00013 Composition B % by weight Carbomer 1.5 Mineral oil 3 Benzyl alcohol 4.3 Alcohol 2 Sodium lauryl sulphate 2 Acid Yellow 3 0.1 HC Yellow 16 0.1 HC Blue 18 0.05 HC Red 18 0.02 Acid red 52 0.02 EDTA 0.5 Fragrance 0.5 Water to 100

EXAMPLE 6

(40) TABLE-US-00014 Composition B % by weight Xanthan gum 1 Dimethicone 2 Benzyl alcohol 4.3 Phenoxyethanol 2 Sodium cetearyl sulphate 2 Acid Yellow 3 0.1 HC Yellow 16 0.15 HC Blue 18 0.02 HC Red 18 0.08 Acid red 52 0.075 EDTA 0.5 Fragrance 0.5 Water to 100

EXAMPLE 7

(41) TABLE-US-00015 Composition B % by weight Carbomer 1 Dimethicone 0.25 Mineral oil 1 Phenoxyethanol 2 Sodium cetearyl sulphate 2 Acid Yellow 3 0.1 HC Yellow 16 0.15 HC Blue 18 0.02 HC Red 18 0.08 Acid red 52 0.075 EDTA 0.5 Fragrance 0.5 Water to 100

EXAMPLE 8

(42) TABLE-US-00016 Composition B % by weight Cetearyl alcohol 5 Dimethicone 0.25 Mineral oil 1 Phenoxyethanol 2 Ceteareth-20 2 Acid Yellow 3 0.1 HC Yellow 16 0.15 HC Blue 18 0.1 HC Red 18 0.08 Acid red 52 0.1 EDTA 0.5 Fragrance 0.5 Water to 100

EXAMPLE 9

(43) TABLE-US-00017 Composition B % by weight Carbomer 1 Cetearyl alcohol 4 Dimethicone 0.25 Mineral oil 1 Phenoxyethanol 2 Ceteareth-20 2 Acid Yellow 3 0.1 HC Yellow 16 0.15 HC Blue 18 0.1 HC Red 18 0.08 Acid red 52 0.1 EDTA 0.5 Fragrance 0.5 Water to 100