Process for preparing azo dyes
US4247458A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 8, 1979 |
| Grant date | Jan 27, 1981 |
| Priority date | — |
| Expiry date | Feb 8, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B41/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a process for coupling a disperse dye diazo component selected from diazonium salts of substituted and unsubstituted phenyl, 2-thiazolyl, 2-benzothiazolyl, 1,3,4-thiadiazol-2-yl, 1,2,4-thiadiazol-5-yl, 2,1-benzisothiazol-3-yl, isothiazol-5-yl, 1,3,4-triazol-2-yl, pyrazol-5-yl, imidazol-2-yl, phthalimid-3 or 4-yl, 1-naphthyl, and 2-thienyl radicals comprising reacting with said component a disperse dye coupler having in the coupling position on the ring a substituent typified by --CHO, --COOH, --COCH.sub.3, --SO.sub.3 H, displaceable diazonium radicals including the above, and another or the same coupler linked to said coupler by certain bivalent radicals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.