# US 2018/0021601 A1 · Hair-conditioning agent and method for oxidative hair dyeing with improved brightening performance

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- Number: US 2018/0021601 A1
- Document ID: US20180021601A1
- Status: Published application
- Kind: A1
- Application number: 15/654,711
- Filed: 2017-07-20
- Published: 2018-01-25
- Earliest claimed: 2016-07-22
- Assignees: Henkel AG & Co. KGaA
- Applicants: Henkel AG & Co. KGaA
- Inventors: Sylvia Kerl; Susanne Bietz; Thomas Hippe; Hartmut Manneck
- Web page: https://patentgrep.com/patent/US20180021601A1

## CPC

- A61K 8/062: {Oil-in-water emulsions}
- A61K 8/22: Peroxides; Oxygen; Ozone
- A61K 8/34: Alcohols
- A61K 8/361: {Carboxylic acids having more than seven carbon atoms in an unbroken chain; Salts or anhydrides thereof}
- A61K 8/362: Polycarboxylic acids
- A61K 8/41: Amines
- A61K 8/416: {Quaternary ammonium compounds (A61K8/35 takes precedence)}
- A61K 8/65: Collagen; Gelatin; Keratin; Derivatives or degradation products thereof
- A61Q 5/10: Preparations for permanently dyeing the hair
- A61K 2800/882: Mixing prior to application
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS

## Abstract

Coloring agents for keratin fibers and methods for the oxidative dyeing of keratin fibers are provided herein. In an embodiment, a coloring agent for keratin fibers includes, based on its weight, a) at least one compound selected from the group of oxidation dye precursors, direct dyes, or mixtures thereof, b) at least one dicarboxylic acid having 2 to 10 carbon atoms and/or at least one salt of this/these acid(s) in a total quantity of from about 0.1 to about 5% by weight, calculated respectively on the undissociated dicarboxylic acid and based on the weight of the coloring agent, c) at least one keratin hydrolyzate having an average molecular weight Mw in the range from about 2000 to about 7000 daltons, d) from about 20 to about 95% by weight of water and e) from zero to less than about 0.1% by weight of peroxide compound(s).

## Claims

### Claim 1

A coloring agent for keratin fibers comprising, based on its weight,
a) at least one compound selected from the group of oxidation dye precursors, direct dyes, or mixtures thereof,
b) at least one dicarboxylic acid having 2 to 10 carbon atoms and/or at least one salt of this/these acid(s) in a total quantity of from about 0.1 to about 5% by weight, calculated respectively on the undissociated dicarboxylic acid and based on the weight of the coloring agent,
c) at least one keratin hydrolyzate having an average molecular weight Mw in the range from about 2000 to about 7000 daltons,
d) from about 20 to about 95% by weight of water, and
e) from zero to less than about 0.1% by weight of peroxide compound(s).

### Claim 2 (depends on 1)

The coloring agent according to claim 1, wherein the coloring agent comprises b) the at least one dicarboxylic acid having 2 to 10 carbon atoms and wherein the at least one dicarboxylic acid having 2 to 10 carbon atoms is selected from the group of succinic acid, DL-malic acid, L-malic acid, D-malic acid, oxalic acid, malonic acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, maleic acid, fumaric acid, D-tartaric acid, L-tartaric acid, meso-tartaric acid, tauric acid, alpha-ketoglutaric acid, beta-ketoglutaric acid, oxalacetic acid and mixtures thereof.

### Claim 3 (depends on 1)

The coloring agent according to claim 1, wherein the coloring agent comprises b) the at least one salt of the the dicarboxylic acid having 2 to 10 carbon atoms and wherein the at least one salt of the at least one dicarboxylic acid having 2 to 10 carbon atoms is selected from the group of sodium, potassium, magnesium, calcium, ammonium, and monoethanolammonium salts; the salts with arginine, lysine, ornithine and histidine; and mixtures of these salts.

### Claim 4 (depends on 1)

The coloring agent according to claim 1, wherein the at least one dicarboxylic acid having 2 to 10 carbon atoms and/or its salt is contained in a total amount of from about 0.2 to about 4% by weight, calculated respectively on the undissociated dicarboxylic acid and based on the weight of the coloring agent.

### Claim 5 (depends on 1)

The coloring agent according to claim 1, wherein the at least one keratin hydrolyzate is contained in a total quantity of from about 0.05-4% by weight, based respectively on the weight of the coloring agent.

### Claim 6 (depends on 1)

The coloring agent according to claim 1, comprising water from about 30 to about 90% by weight, based respectively on the weight of the coloring agent.

### Claim 7 (depends on 1)

The coloring agent according to claim 1, further comprising at least one amino acid chosen from the group of arginine, lysine, histidine, or mixtures thereof.

### Claim 8

A method for the oxidative dyeing of keratin fibers comprising the following method steps:
I. Providing a composition (A) comprising, based on its weight,
a) at least one compound selected from the group of oxidation dye precursors, direct dyes, and mixtures thereof,
b) at least one dicarboxylic acid having 2 to 10 carbon atoms and/or at least one salt of these acid(s) in a total quantity of from about 0.1 to about 5% by weight, calculated respectively on the undissociated dicarboxylic acid and based on the weight of the composition (A),
c) at least one keratin hydrolyzate having an average molecular weight Mw in the range from about 2000 to about 7000 daltons,
d) from about 20 to about 95% by weight of water, and
e) zero to less than about 0.1% by weight of peroxide compound(s),
II. Providing a composition (B) comprising at least one peroxide compound, in an amount of from about 1 to about 23% by weight, based respectively on the weight of the composition (B), wherein the composition (B) has a pH value in the range of from about 2.5 to about 6.5,
III. Mixing the compositions (A) and (B) with each other, directly afterward
IV. Applying the mixture of (A) and (B) to the keratin fibers, and
V. Rinsing after an exposure time of from about 0.1 to about 60 minutes,
VI. Optionally one or more of shaping, conditioning and/or drying the hair.

### Claim 9 (depends on 1, 8)

The method according to claim 8, wherein the composition (A) is a coloring agent according to claim 1.

### Claim 10 (depends on 8)

The method according to claim 8, wherein the composition (A) comprises at least one oxidation dye precursor in a total amount of from about 0.001 to about 0.3% by weight, based on the weight of the composition (A), and the composition (B) comprises from about 5 to about 18% by weight, of hydrogen peroxide, based respectively on the weight of the composition (B).

### Claim 11 (depends on 1)

The coloring agent according to claim 1, wherein the c) at least one keratin hydrolyzate has an average molecular weight Mw in the range from about 3000 to about 5000 daltons.

### Claim 12 (depends on 1)

The coloring agent according to claim 1, wherein the coloring agent comprises b) the at least one dicarboxylic acid having 2 to 10 carbon atoms and wherein the at least one dicarboxylic acid having 2 to 10 carbon atoms is selected from the group of succinic acid, DL-malic acid, and mixtures thereof.

### Claim 13 (depends on 1)

The coloring agent according to claim 1, wherein the at least one dicarboxylic acid having 2 to 10 carbon atoms and/or its salt is contained in a total amount of from about 0.5 to about 2% by weight, calculated respectively on the undissociated dicarboxylic acid and based on the weight of the coloring agent,
wherein the c) at least one keratin hydrolyzate is contained in a total quantity of from about 0.9-1.3% by weight, based respectively on the weight of the coloring agent, and
wherein water is present in an amount of from about 45 to about 75% by weight, based respectively on the weight of the coloring agent.

### Claim 14 (depends on 7)

The coloring agent according to claim 7, wherein the at least one amino acid is chosen from mixtures of arginine and lysine.

### Claim 15 (depends on 7)

The coloring agent according to claim 7, wherein the at least one amino acid is present in a total amount of from about 0.05 to about 3% by weight, based respectively on the undissociated amino acid and based on the weight of the coloring agent.

### Claim 16 (depends on 7)

The coloring agent according to claim 7, wherein the at least one amino acid is present in a total amount of from about 0.2 to about 1.2% by weight, based on the undissociated amino acid and based on the weight of the coloring agent.

### Claim 17 (depends on 8)

The method according to claim 8, wherein providing the composition (B) comprises providing the composition (B) comprising the at least one peroxide compound, in an amount of from about 6 to about 12% by weight, based respectively on the weight of the composition (B), wherein the composition (B) further comprises water and has a pH value in the range of from about 3.5 to about 5.0, in each case measured at 20° C.

### Claim 18 (depends on 8)

The method according to claim 8, wherein mixing the compositions (A) and (B) with each other comprises mixing the compositions (A) and (B) with each other in a weight ratio (A):(B) in the range of from about 1:0.8 to about 1:2.5.

### Claim 19 (depends on 8)

The method according to claim 8, wherein rinsing after the exposure time comprises mixing after an exposure time of from about 10 to about 30 minutes.

### Claim 20 (depends on 8)

The method according to claim 8, wherein the composition (A) comprises the at least one oxidation dye precursor in a total amount of from about 0.01 to about 0.2% by weight, based on the weight of the composition (A), and the composition (B) comprises from 6 to about 12% by weight of hydrogen peroxide, based respectively on the weight of the composition (B).