Nitro dyestuffs, a process for their preparation, and use of these dyestuffs in dyeing keratin fibres
US4432769A · kind A · utility
4Cited by
2References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1981 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Aug 7, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Compounds having the general formula: ##STR1## in which R denotes hydrogen, a lower alkyl, lower hydroxyalkyl or lower polyhydroxyalkyl radical or alternatively an alkyl, hydroxyalkyl or polyhydroxyalkyl radical in which the alkyl chain is interrupted by one or more hetero-atoms such as oxygen are described. These compounds can be used in dyeing compositions for keratin fibres and wavesetting lotions. They make it possible to obtain very strong shades.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.