Azo dyestuff including a 1,3 or 1,4-benzodioxan ring structure fused to a thiazole ring
US4002604A · kind A · utility
5Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1975 |
| Grant date | Jan 11, 1977 |
| Priority date | — |
| Expiry date | Nov 26, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B44/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Azo dyestuffs devoid of carboxylic acid and sulphonic acid groups and of the formula I ##STR1## wherein A is the residue of 1,3 or 1,4-benzodioxan ring structure fused to the thiazole ring via the benzene ring, B is the residue of a para-coupling amine or an indole, R is an optionally substituted alkyl, alkenyl, cycloalkyl or aralkyl radical and X is an anion. The dyestuffs are useful for the colorization of synthetic polymeric materials particularly polyacrylonitrile and copolymers thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.