# US 4,396,392 A · Method for the coloring of hair

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- Number: US 4,396,392 A
- Document ID: US4396392A
- Status: Granted
- Kind: A
- Application number: 06/127,507
- Filed: 1980-03-05
- Granted: 1983-08-02
- Earliest claimed: 1978-08-03
- Assignees: Wella Aktiengesellschaft
- Inventors: Eugen Konrad; Herbert Mager
- Web page: https://patentgrep.com/patent/US4396392A

## CPC

- A61K 8/415: {Aminophenols}
- A61Q 5/10: Preparations for permanently dyeing the hair
- 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

Agents for the oxidative dyeing of hair, containing as coloring component 6-amino-3-methylphenol, also in the form of its salts or phenolates. The coloring component is contained in these agents in a quantity of about 0.01 to 2.0 percent by weight, alone or in a mixture with the customary developing and coupling substances. In the case of a mixture, the 6-amino-3-methylphenol is preferably used at a molar ratio below normal relative to these developing and coupling substances. The oxidative reaction of the 6-amino-3-methylphenol proceeding with an intensive yellow coloring is generally not influenced by the customary developing and coupling substances that may be present.

## Claims

### Claim 1

A method for dyeing human hair with oxidative dyes which comprises applying to said hair, at temperature of from 15.degree. to 50.degree. C. an effective amount for dyeing, of a mixture of a suitable oxidizing agent and an aqueous composition containing from 0.01 to 2.0% by weight of 6-amino-3-methyl-phenol, allowing said mixture to remain in contact with said hair for a period of time to effectively dye said hair, and thereafter rinsing said hair.

### Claim 2 (depends on 1)

A method according to claim 1, wherein the mixture is allowed to remain in contact with the hair for a period of time in the range of 15 to 50 minutes.

### Claim 3 (depends on 1)

A method according to claim 1, wherein the aqueous composition additionally comprises at least one of 1,4-diamino-benzene, 2,5-diamino-toluene, p-amino-phenol, .alpha.-naphthol, 3,4-diamino-benzoicacid, resorcinol, 4-chloro-resorcinol, m-aminophenol, m-phenylene diamine, m-toluylenediamine, 2,4-diamino anisole, 2,4-diamino-benzylalcohol or 3-amino-6-methyl-phenol.

### Claim 4 (depends on 1)

A method according to claim 1, wherein the aqueous composition additionally comprises at least one of Diamond Fuchsin (C.I. 42 510), Leather Ruby HF (C.I. 42 520), 2-nitro-1,4-diaminobenzene, Acid Brown (C.I. 14 805), Acid Blue 135 (C.I. 13 385), Disperse Violet 4 (C.I. 61 105), Disperse Blue 1 (C.I. 64 500), Disperse Red 15 (C.I. 60 710), Disperse Violet 1 (C.I. 61 100), 1,4,5,8-tetraamino-anthraquinone or 1,4-diamino anthraquinone.