Hair dye coupler compounds
US5183941A · kind A · utility
5Cited by
13References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1990 |
| Grant date | Feb 2, 1993 |
| Priority date | — |
| Expiry date | Oct 23, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C233/43
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention concerns the aminophenols (I) as novel couplers ##STR1## wherein R.sub.1 and R.sub.2 may be the same or different and are hydrogen, alkyl and hydroxyalkyl of from 1 to about 6 carbons in the alkyl moiety, or R.sub.1 and R.sub.2 can also form, together with the nitrogen atom to which they are attached, a morpholine, piperidine or pyrrolidine ring, and R.sub.3 and R.sub.4 are hydrogen, alkyl, acyl and hydroxyalkyl having from 1 to about 6 carbons, and oxidative hair dye compositions containing same along with at least one primary dye intermediate in aqueous or hydroalcoholic media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.