Substituted 1,4 diaminobenzene compounds and oxidation dye precursor compositions containing same
US6602302B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2000 |
| Grant date | Aug 5, 2003 |
| Priority date | — |
| Expiry date | Feb 7, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C217/84
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
New substituted 2,5-diamino-1-aminomethylbenzene compounds of formula (I), or physiologically compatible water-soluble salts thereof, are described as well as methods for preparing them. In addition, oxidation dye precursor compositions for dyeing keratin fibers, especially human hair, which each contain from 0.005 to 20 percent by weight of at least one of the new substituted 2,5-diamino-1-aminomethylbenzene compounds of formula (I), or their physiologically compatible water-soluble salts, are described. Methods for dyeing hair with ready-to-apply dye mixtures made by mixing these oxidation dye precursor compositions with an oxidizing agent, such as hydrogen peroxide solution, are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.