Dyeing composition for keratinous fibres containing at least one co-solubilized N-substituted 2-nitro-para-phenylenediamine
US4690685A · kind A · utility
8Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1985 |
| Grant date | Sep 1, 1987 |
| Priority date | — |
| Expiry date | Sep 26, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0034
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to a dyeing composition for keratinous fibres containing at least one 4-bis(.beta.-hydroxyethyl)amino-2-nitro-1-(N-substituted amino)benzene compound in which the substitution is C.sub.1 -C.sub.3 alkyl or .beta.-hydroxyethyl; this composition contains as co-solubilization agent at least one dye of formula (II) ##STR1## in which formula: R.sub.2 denotes a C.sub.2 -C.sub.3 hydroxyalkyl group; PA0 R.sub.3 denotes a C.sub.2 -C.sub.3 hydroxyalkyl group; with the proviso that, if R.sub.3 =CH.sub.2 CH.sub.2 OH, R.sub.2 is necessarily an .alpha.-hydroxyethyl or hydroxypropyl radical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.