Azo, azo methine 1:2 chromium complex dyes
US3978037A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1974 |
| Grant date | Aug 31, 1976 |
| Priority date | — |
| Expiry date | Dec 4, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B45/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
1:2 Chromium complex dyes of the formula ##SPC1## Wherein A represents the radical of a diazo component, B represents the radical of a coupling component, --X-- is --O--, --NH--, ##EQU1## --Y-- is --O-- or --COO--, R.sub.1 is hydrogen or alkyl and R.sub.2 is a radical of the benzene or naphthalene class which is substituted by a carboxy or a sulpho group, K.sup.+ represents a cation, and wherein the benzene ring b can carry a further fused benzene ring or can be substituted by halogen, nitro, low molecular alkyl or alkoxy as well as arylazo groups, and the radicals A and B are devoid of --SO.sub.3 H and --COOH groups. These dyes are useful for dyeing and printing natural and synthetic polyamides to produce level dyeings of good fastness, especially fastness to pulling, water and perspiration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.