2-substituted para-aminophenols and their use for dyeing keratinous fibres
US5053052A · kind A · utility
9Cited by
1References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1990 |
| Grant date | Oct 1, 1991 |
| Priority date | — |
| Expiry date | Dec 28, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C323/29
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
2-Substituted para-aminophenols of general formula: ##STR1## where Y denotes oxygen or sulphur and R denotes a C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 hydroxyalkyl or C.sub.1 -C.sub.6 haloalkyl or a C.sub.2 -C.sub.6 polyhydroxyalkyl, provided that when Y=O, R is not methyl or ethyl and when Y=S, R is not ethyl; and dye composition containing one or more compounds of formula (I) where Y denotes an oxygen or sulphur atom and R is C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 hydroxyalkyl, C.sub.1 -C.sub.6 haloalkyl or C.sub.2 -C.sub.6 polyhydroxyalkyl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.