P-phenylenediamines, process for preparation thereof, dyeing compositions containing them and corresponding dyeing process
US5032137A · kind A · utility
9Cited by
1References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1990 |
| Grant date | Jul 16, 1991 |
| Priority date | — |
| Expiry date | Sep 13, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C323/25
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to p-phenylenediamines of formula: ##STR1## in which R.sub.1 denotes an alkyl, hydroxyalkyl or polyhydroxyalkyl radical and R.sub.2 denotes a hydrogen atom or an alkyl radical, as well as the corresponding salts with acids, and to the compositions and the process for dyeing keratinous fibres, and especially hair, employing them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.