Methods for dyeing keratinous fibres with aminoindoles, compositions and devices for use
US5254135A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1992 |
| Grant date | Oct 19, 1993 |
| Priority date | — |
| Expiry date | Jul 21, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/492
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Method for dyeing keratinous fibres, in particular human keratinous fibres, such as hair, characterized in that a composition (A) containing, in a medium appropriate for dyeing, at least one aminoindole corresponding to the formula: ##STR1## in which: R.sub.1 and R.sub.3, independently of one another, represent a hydrogen atom or a C.sub.1 -C.sub.4 alkyl group; PA0 R.sub.2 denotes hydrogen or a C.sub.1 -C.sub.4 alkyl group or COOR', R' being a hydrogen atom or a C.sub.1 -C.sub.4 alkyl group; PA0 R.sub.4 represents a hydrogen atom or a C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 hydroxyalkyl or C.sub.2 -C.sub.4 polyhydroxyalkyl group; PA0 Z.sub.1 represents a hydrogen or halogen atom or a C.sub.1 -C.sub.4 alkyl group or OR; PA0 R being a hydrogen atom or a C.sub.1 -C.sub.4 alkyl group; and PA0 Z.sub.2 represents a hydrogen atom or a C.sub.1 -C.sub.4 alkyl group; and its salts is applied to said fibres, the colour being developed with the aid of an oxidizing system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.