Keratinous fiber dyeing compositions and processes utilizing oxidation dye precursors in combination with dimethoxy meta-aminophenol couplers
US5443596A · kind A · utility
16Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1993 |
| Grant date | Aug 22, 1995 |
| Priority date | — |
| Expiry date | Dec 21, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C217/84
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A composition for dyeing keratinous fibers includes, in a suitable dyeing medium, at least one oxidation dye precursor and at least one coupler of formula (I) ##STR1## wherein R is hydrogen, C.sub.1 -C.sub.4 lower alkyl, C.sub.1 -C.sub.6 monohydroxyalkyl, C.sub.2 -C.sub.6 polyhydroxyalkyl, or alkylcarbonyl where the alkyl groups have one to four carbon atoms, or the acid addition salts thereof. Also disclosed is a method of dyeing hair using the disclosed composition, certain novel meta-aminophenols and the use of the latter as couplers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.