Hair dyeing composition

Abstract

The present invention relates to a hair dyeing composition comprising select hair direct dyes and a reducing agent in order to color hair homogeneously, intensively and durably.

Claims

1. A ready to use aqueous composition for coloring hair comprising one or more direct dyes selected from the compounds ##STR00003## and one or more reducing agents selected from the group consisting of thioglycolic acid and its salts, thiolactic acid and its salts, dihydrolipoate, thioglycerol, mercapropropionic acid and its salts, cysteine and its salts, N substituted cysteins, cystamines, thioethanol, sulfite salts, bisulfite salts, and metabisulfite salts.

2. A two-part aqueous hair coloring composition comprising parts A and B for mixing prior to application onto hair, wherein the part A is an aqueous composition comprising one or more direct dyes selected from the compounds ##STR00004## and the part B is an aqueous composition comprising one or more reducing agents selected from the group consisting of thioglycolic acid and its salts, thiolactic acid and its salts, dihydrolipoate, thioglycerol, mercapropropionic acid and its salts, cysteine and its salts, N substituted cysteins, cystamines, thioethanol, sulfite salts, bisulfite salts, and metabisulfite salts.

3. The composition according to claim 1, wherein the one or more direct dyes are comprised at a concentration 0.001 to 10% by weight, calculated to the total of the composition.

4. The composition according to claim 1, further comprising: additional direct dyes selected from neutral, cationic and anionic dyes.

5. The composition according to claim 1, wherein the one or more reducing agents are present at a total concentration of 0.001 to 10% by weight, calculated to the total of the composition.

6. The composition according to claim 1, further comprising: one or more alkalizing agents, at a total concentration in the range between 1 and 35% by weight, calculated to the total of the composition.

7. The composition according to claim 6, wherein the one or more alkalizing agents are selected from ammonia and a compound according to the general structure
R.sub.9R.sub.10R.sub.11N wherein R.sub.9, R.sub.10 and R.sub.11 are same or different H, C.sub.1-C.sub.6 alkyl, C.sub.1-C.sub.6 monohydroxyalkyl or C.sub.2-C.sub.6 polyhydroxyalkyl with the condition that at least one of R.sub.9, R.sub.10 and R.sub.11 is a mono or polyhydroxyalkyl, C.sub.1-C.sub.4 monohydroxyalkyl or C.sub.2-C.sub.4 polyhydroxyalkyl with the condition that at least one of R.sub.9, R.sub.10 and R.sub.11 is a mono or polyhydroxyalkyl.

8. The composition according to claim 1, further comprising: one or more organic solvents, at a total concentration in the range of 0.5 to 40% by weight, calculated to the total of the composition.

9. The composition according to claim 1, further comprising: one or more fatty alcohols.

10. The composition according to claim 1, further comprising: one or more surfactants selected from non-ionic, anionic and cationic ones.

11. The composition according to claim 1, wherein the composition has a pH in the range of 2 to 11.

12. A process for coloring hair, the process comprising: applying the composition according to claim 1 onto hair for a period of 1 to 45 min; rinsing the composition off from the hair; and drying the hair.

13. The process according to claim 12, further comprising: shampooing the hair with an additional composition comprising oxidizing agent before drying the hair.

Description

EXAMPLE 1

(1) Dye Composition

(2) TABLE-US-00001 % by weight Dyestuff 0.2 Isopropanol 5.0 Phenoxyethanol 2.0 Monoethanolamine 3.2 Ammonium chloride 1.0 Water q.s. to 100

(3) The pH of the above composition is 10.0

(4) Reducing Composition

(5) TABLE-US-00002 % by weight Isopropanol 5.0 Thioglycolic acid 2.0 Monoethanolamine 6.0 Ammonium chloride 1.0 Water q.s. to 100

(6) The pH of the above composition is 10.0

(7) Composition without Reducing Agent

(8) TABLE-US-00003 % by weight Isopropanol 5.0 Monoethanolamine 6.0 Ammonium chloride 1.0 Water q.s. to 100

(9) The pH of the above composition is 10.0

(10) The dyestuffs used were the compound III according to the invention and Acid Black 1 according to the prior art (comparative composition)

(11) The hair (natural human hair at a colour level 7) colouring was carried out by application of the dyeing composition after mixing the dyeing composition with reducing composition (for comparative purposes with the composition without reducing agent) at a weight ratio of 1 to 1 onto hair and leaving on the hair for 30 min at room temperature and rinsing it off from hair. After drying the hair colour was measured with a laboratory colorimeter and color differences (E) were calculated between uncoloured and coloured tresses. The results are as follows:

(12) TABLE-US-00004 E HC Blue 18 24.1 HC Blue 18 + 1% TGA 30.9 Acid Black 1 + 1% TGA 19.2

(13) The above results clearly demonstrates that addition of reducing agent to the dyeing composition increase colour intensity (the E is higher) and the blue dye according to the invention colours hair more intensively than the dye known from the prior art.

(14) In order to demonstrate homogeneous colouration of hair, the above dyeing compositions were applied onto natural and permanently shaped goat hair in the same way as described above. The results are as follows:

(15) TABLE-US-00005 Delta E values Goat Goat Permed HC Blue 18 64.1 76.3 HC Blue 18 + 1% TGA 71.4 77.4 Acid Black 1 + 1% TGA 49.0 64.5

(16) The above results clearly show that the dyeing composition according to present invention colours natural and permanently shaped hair homogeneously whereas the composition without reducing agent may not achieve the same homogeneity. The dyeing composition according to the literature does not provide homogeneous colour on goat hair.

EXAMPLE 2

(17) Ready to Use Dyeing Composition

(18) TABLE-US-00006 % by weight Dyestuff I 0.2 Isopropanol 5.0 Phenoxyethanol 2.0 Thioglycolic acid 1.2 Monoethanolamine 3.9 Ammonium chloride 1.0 Xanthan gum 1.0 Water q.s. to 100

(19) The pH of the above composition is 10.4

EXAMPLE 3

(20) Ready to Use Dyeing Composition

(21) TABLE-US-00007 % by weight Dyestuff III 0.2 Isopropanol 5.0 Phenoxyethanol 2.0 Thioglycolic acid 1.2 Monoethanolamine 3.2 Ammonium chloride 1.0 Cetearyl alcohol 9.0 Sodium laureth sulphate 3.0 Water q.s. to 100

(22) The pH of the above composition is 9.7

EXAMPLE 4

(23) Ready to Use Dyeing Composition

(24) TABLE-US-00008 % by weight Dyestuff V 0.2 Isopropanol 5.0 Phenoxyethanol 2.0 Thioglycolic acid 1.2 Monoethanolamine 2.6 Ammonium chloride 1.0 Cetearyl alcohol 9.0 Ceteareth-20 3.0 Water q.s. to 100

(25) The pH of the above composition is 9.5

EXAMPLE 5

(26) Ready to Use Dyeing Composition

(27) TABLE-US-00009 % by weight Dyestuff V 0.2 Isopropanol 5.0 Phenoxyethanol 2.0 Cystein HCl 1.2 Monoethanolamine 2.9 Cetearyl alcohol 9.0 Ceteareth-20 3.0 Water q.s. to 100

(28) The pH of the above composition is 9.5

EXAMPLE 6

(29) Ready to Use Dyeing Composition

(30) TABLE-US-00010 % by weight Dyestuff V 0.2 Isopropanol 5.0 Phenoxyethanol 2.0 Cystein HCl 1.2 Ammonium hydroxide 2.9 Ammonium chloride 1.0 Cetearyl alcohol 9.0 Ceteareth-20 3.0 Water q.s. to 100

(31) The pH of the above composition is 9.5

(32) TABLE-US-00011 Example All values are % by weight 7 8 9 10 11 12 2-Propanol 5.00 5.00 5.00 5.00 5.00 5.00 Benzyl Alcohol 1.00 2.00 Phenoxyethanol 2.00 2.00 Ammonium 5.00 5.00 5.00 5.00 5.00 5.00 hydroxide (25%) Sodium sulfit 0.50 Ammonium 2.00 2.00 2.00 2.00 2.00 2.00 thioglycolate HC Blue 17 0.10 Basic Yellow 87 0.20 Basic Red 51 0.20 3-Nitro-N-(2- 0.20 hydroxypropyl)- 4-aminophenol HC Blue 2 HC Yellow 10 0.20 Acid Red 52 0.30 Acid Yellow 3 Acid Violet 43 Dye I (yellow) 0.2 0.1 Dye III (blue) 0.2 0.2 0.2 Dye V (red) 0.1 0.1 Water to to to to to to 100 100 100 100 100 100 pH (adjusted 10 10 10 10 10 10 with HCl) Coloring on green violet red brown purple orange white goat hair Example All values are % by weight 13 14 15 16 17 2-Propanol 5.00 5.00 5.00 5.00 5.00 Benzyl Alcohol Phenoxyethanol Ammonium 5.00 5.00 5.00 5.00 5.00 hydroxide (25%) Sodium sulfit 2.00 Ammonium 2.00 2.00 2.00 2.00 2.00 thioglycolate HC Blue 17 Basic Yellow 87 Basic Red 51 3-Nitro-N-(2- 0.20 0.3 hydroxypropyl)- 4-aminophenol HC Blue 2 0.2 HC Yellow 10 0.10 Acid Red 52 Acid Yellow 3 0.3 Acid Violet 43 0.40 Dye I (yellow) Dye III (blue) 0.3 0.3 Dye V (red) 0.1 0.3 0.2 Water to to to to to 100 100 100 100 100 pH (adjusted 10 10 10 10 10 with HCl) Coloring on purple brown violet orange- violet white goat hair red Formulation, all values in Example [%] 18 19 Sodium bicarbonate 15 15 EDTA 2 2 Paraffin Oil 9 9 Sodium sulfit 2 Cystein HCl 2 Sodium metasilicate 8 8 Dye III 1 1 Dye V 1 1 Diatomaceous Earth @100 @100 Coloring on violet violet white goat hair

(33) Examples 18 and 19 are in powder form.

(34) Dyeing Method

(35) The reductive alkaline dyeing powder base is mixed with water or a water based solution at a weight ratio of e.g. 1:1 and applied onto hair, and after processing 1 to 45 min at ambient temperature, and hair is optionally rinsed off with water and is treated with an oxidizing composition, rinsed off, optionally shampooed and dried.