Metaphenylenediamines
US4329504A · kind A · utility
Inventors
Key dates
| Filing date | Oct 1, 1980 |
| Grant date | May 11, 1982 |
| Priority date | — |
| Expiry date | Oct 1, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/466
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Couplers having the general formula (I): ##STR1## or the acid salts thereof in which formula R is either PA1 (a) hydrogen or PA1 (b) a C.sub.1 -C.sub.3 alkyl or PA1 (c) a C.sub.1 -C.sub.3 hydroxyalkyl, and PA0 Z is either PA1 (a) hydroxyalkyl, or PA1 (b) alkoxyalkyl in which the alkoxy group contains 1 to 2 carbon atoms, or PA1 (c) mesylaminopropyl, or PA1 (d) acetylaminoalkyl, or PA1 (e) ureidoalkyl, or PA1 (f) carbethoxyaminoalkyl PA0 the alkyl groups in the radicals constituting z comprising 2 or 3 carbon atoms and PA0 Z is not hydroxyethyl when R is hydrogen. These couplers form dyeing compositions when mixed with an oxidation base consisting of a paraphenylenediamine having the general formula: ##STR2##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.