Asymmetric 1:2 chromium complexes of monoazo compounds
US4396544A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1980 |
| Grant date | Aug 2, 1983 |
| Priority date | — |
| Expiry date | Sep 19, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B45/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
1:2 Chromium complexes of the formula, ##STR1## in which R.sub.1 is hydrogen, chlorine, bromine, nitro (being meta to the first nitro group), C.sub.1-4 alkyl or C.sub.1-4 alkoxy, PA1 R.sub.2 is hydrogen or nitro, PA1 Y is ##STR2## wherein R.sub.3 is hydrogen, chlorine, bromine, trifluoromethyl, C.sub.1-4 alkyl or C.sub.1-4 alkoxy, and PA1 R.sub.4 is hydrogen, chlorine, bromine, C.sub.1-4 alkyl or C.sub.1-4 alkoxy, and PA1 A is a ##STR3## wherein the carbon atom marked with the * is bound to the azo radical, which complexes are in free acid or salt form, and mixtures thereof, are useful for dyeing and printing nitrogen-containing organic substrates, for example, natural and synthetic polyamides such as wool, silk and nylon, polyurethanes, polyolefins modified to contain basic groups and leather, for dyeing metals such as anodized aluminum and in printing lacquers and ball-point pen inks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.