Azo dyestuff including a 1,3 or 1,4-benzodioxan ring structure f

Details Azo dyestuff including a 1,3 or 1,4-benzodioxan ring structure f Azo dyestuff including a 1,3 or 1,4-benzodioxan ring structure f

1975-11-26

1977-01-11

Curtis, Allen B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260305, 260158, C09B 2936

Patent

active

040026043

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.

REFERENCES:
patent: 2876231 (1959-03-01), Horwitz
patent: 3515713 (1970-06-01), Siegel et al.
patent: 3705145 (1972-12-01), Gottschlich et al.
patent: 3787178 (1974-01-01), Renfrew

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