Process for the manufacture of bis-azomethine metal complex colorants
US4008225A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1975 |
| Grant date | Feb 15, 1977 |
| Priority date | — |
| Expiry date | Jul 28, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B55/005
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Process for the manufacture of bis-azomethine metal complex colorants of the formula ##STR1## wherein A denotes an isocyclic or heterocyclic aromatic radical, X denotes an isocyclic or heterocyclic aromatic radical to which the N-atoms are bonded in the o-position or peri-position, or an alkylene radical containing 2-8 C atoms, and M denotes a divalent transition metal ion, a zinc ion or cadmium ion, characterized in that an o-hydroxyaldimine compound of the formula ##STR2## wherein A has the abovementioned meaning and R denotes an alkyl, cycloalkyl or aryl radical, is reacted with a diamine of the formula EQU NH.sub.2 --X--NH.sub.2 wherein X has the abovementioned meaning, in the molar ratio of 2:1, in the presence of a compound which donates a divalent transition metal cation, zinc ion or cadmium ion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.