Chromium and cobalt complex amino hydroxy azomethine dyes
US4315854A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1980 |
| Grant date | Feb 16, 1982 |
| Priority date | — |
| Expiry date | Mar 24, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B55/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
1:2 Metal complex dyes of azomethines of the formula ##STR1## wherein R is hydrogen, unsubstituted or substituted alkyl, aralkyl, aryl, alkylsulfonyl or arylsulfonyl, A is the radical of an aliphatic 1,2- or 1,3-diamine or of a carbocyclic or heterocyclic 1,2-diamine, B is the radical of an aromatic o-hydroxyaldehyde, Ar.sub.1 is an aromatic radical, m is 1 or 2, and Ar.sub.2 is an aromatic-carbocyclic or heterocyclic radical. These dyes are suitable for dyeing and printing polyamide materials. The dyes are distinguished by their excellent fastness properties, especially good lightfastness. They have good covering power; produce level dyeings; and have good fastness to washing, water, perspiration, alkali, acid, diffusion and rubbing. Strong yellow, yellowish brown, reddish brown, dark brown or olive brown shades are obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.