WATERRSOLUBLE AZO DYE NOT HAVING CARBOXYLIC ACID GROUP NOR SULFONIC ACID GROUP*ITS MANUFACTURE AND DYEING METHOD FOR SYNTHETIC POLYMER MATERIAL THEREWITH

摘要

Blue cationic azo dyes for polyacrylonitrile are derived from a substituted 3-amino-2,1-benzisothiazole diazo component and a N-substituted p-aminophenyl coupling component containing a beta -hydroxy substituent on a C3-6 alkylene group linking a cationic moiety to the N- atom. Unlike Basic Blue 41, the dyes have excellent fastness to steam pleating and dry heat treatments and excellent hydrolytic stability. But like Basic Blue 41 they have excellent build-up properties. Thus they combine the good tinctorial strength and build-up properties of Basic Blue 41 and the excellent fastness of the anthraquinone dyes. They also exhibit excellent light fastness and pH stability.