# US 4,395,262 A · Hair dyeing agent

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- Number: US 4,395,262 A
- Document ID: US4395262A
- Status: Granted
- Kind: A
- Application number: 06/196,551
- Filed: 1980-04-16
- Granted: 1983-07-26
- Earliest claimed: 1980-02-28
- Assignees: Wella Aktiengesellschaft
- Inventors: Eugen Konrad; Herbert Mager
- Web page: https://patentgrep.com/patent/US4395262A

## CPC

- A61K 8/4973: {with oxygen as the only hetero atom}
- 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 coupling substance at least one derivative of 1,2-methylene dioxybenzene of the general formula ##STR1## in which R signifies an OH--, NH.sub.2 --, NHR.sup.1 -- or NR.sup.1 R.sup.2 -group, wherein R.sup.1 and R.sup.2 represent, independently of each other, an alkyl-, hydroalkyl-, or acyl group with 1 to 4 carbon atoms. The coupling substance is contained in these agents in a concentration of about 0.01 to 3.0 percent by weight, i.e. in a mixture with customary developing substances and, in given instances, also customary coupling substances. The particular possibility exists of producing dark natural tints by a mixture of 4-oxy-1,2-methylene dioxybenzene with the developing substance p-aminophenol.

## Claims

### Claim 1

Composition for the oxidative dyeing of hair, comprising a combination of at least one developing substance and at least one coupling substance, comprising as coupling substance at least one derivative of 1,2-methylene dioxybenzene of the general formula ##STR3## in which R signifies an OH--, NH.sub.2 --, NHR.sup.1 --, or NH.sup.1 R.sup.2 -- group wherein R.sup.1 and R.sup.2 represent, independent of each other, an alkyl or hydroxyalkyl group with 1 to 4 carbon atoms.

### Claim 2 (depends on 1)

Composition according to claim 1, characterized by containing as coupling substance 4-hydroxy-1,2-methylenedioxybenzene.

### Claim 3 (depends on 1)

Composition according to claim 1, characterized by containing the coupling substance in a concentration of about 0.01 to 3.0% by weight of the composition.

### Claim 4 (depends on 3)

Composition according to claim 3, characterized by containing the coupling substances in a concentration of about 0.1 to 3.0 percent by weight of the composition.

### Claim 5 (depends on 1)

Composition according to claim 1, characterized by containing one of the developing substances selected from the group consisting of 1,4-diaminobenzene, 2,5-diaminotoluene and p-aminophenol.

### Claim 6 (depends on 1)

Composition according to claim 1, characterized by also containing a customary coupling substance selected from the group consisting of .alpha.-naphthol, m-aminophenol, m-phenylenediamine, m-toluylenediamine, 2,4-diaminoanisole, 3,4-diaminobenzoic acid and 6-methylene-3-aminophenol.

### Claim 7 (depends on 1)

Composition according to claim 1, characterized by the total quantity of the combination of developing substance and coupling substance amounting to 0.1 to 5.0% by weight of the composition.

### Claim 8 (depends on 7)

Composition according to claim 7, characterized by the total quantity of the combination of developing substance and coupling substance amounting to about 0.5 to 3.0% by weight of the composition.

### Claim 9 (depends on 1)

Composition according to claim 1, further comprising a direct drawing colorant selected from the group consisting of Diamond Fuchsin (C.I. 42 510), Leather Ruby HF (C.I. 42 250), 2-nitro-1,4-diaminobenzene, Acid Brown 4 (C.I. 14 805), Acid Blue 35 (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-tetra-amino-anthraquinone and 1,4-diamino anthraquinone.

### Claim 10 (depends on 1)

Composition according to claim 1, further comprising antioxidants.

### Claim 11 (depends on 10)

Composition according to claim 10, wherein said antioxidants are selected from the group consisting of ascorbic acid and sodium sulfite.