Tinctorial composition for keratinous fibres containing oxidation dye precursors and aminoindole couplers, methods for dyeing using these compositions and new compounds
US5364414A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1992 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Jul 22, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/492
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Oxidation tinctorial composition intended to be used for dyeing keratinous fibres, in particular human keratinous fibres and especially hair, characterized in that it contains, in a solvent medium appropriate for dyeing these fibres, at least one para oxidation dye precursor or at least one ortho oxidation dye precursor and at least one heterocyclic coupler corresponding to the formula (I): ##STR1## in which: R.sub.1 and R.sub.3, which may be identical or different, denote a hydrogen atom or a C.sub.1 -C.sub.4 alkyl group; PA1 R.sub.2 denotes a hydrogen atom, a C.sub.1 -C.sub.4 alkyl group, a carboxyl group or an alkoxycarbonyl group; at least one of the radicals R.sub.2 or R.sub.3 denotes hydrogen; PA1 R.sub.4 denotes a hydrogen atom or a C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 hydroxyalkyl or C.sub.2 -C.sub.4 polyhydroxyalkyl group; PA1 the group NHR.sub.4 occupying the positions 4, 6 or 7 of the benzene ring, as well as their salts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.