Tinctorial composition for keratinous fibers containing oxidation dye precursors and couplers derived from 4-hydroxyindole, and dyeing method using them
US5609649A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1994 |
| Grant date | Mar 11, 1997 |
| Priority date | — |
| Expiry date | Jun 20, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/492
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Tinctorial composition for keratinous fibers, in particular for human hair, characterized in that it contains, in a medium appropriate for dyeing these fibers, at least one para oxidation dye precursor or at least one ortho oxidation dye precursor in combination with at least one heterocyclic coupler, corresponding to the formula: ##STR1## in which R.sub.1 denotes a hydrogen atom or a C.sub.1 -C.sub.4 alkyl radical; R.sub.2 denotes a hydrogen atom, a C.sub.1 -C.sub.4 lower alkyl radical, a carboxyl radical or an alkoxycarbonyl radical; R.sub.3 denotes a hydrogen or halogen atom, a C.sub.1 -C.sub.4 lower alkyl radical, a carboxyl radical, an alkoxycarbonyl radical or a formyl radical; X denotes a hydrogen atom, a C.sub.1 -C.sub.4 alkyl radical, a halogen atom, a C.sub.1 -C.sub.4 alkoxy radical, an acetylamino group or a dialkyl(C.sub.1 -C.sub.4)aminomethyl group; at least one of the groups X, R.sub.1, R.sub.2 and R.sub.3 differing from hydrogen; as well as their salts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.