Water-insoluble thiazole and thiadiazole azo dyestuffs

摘要

Water-insoluble p-aminoazo dyes having a thiadiazole diazo component and an acetoacetoxyalkyl group on the amino nitrogen atom of a p-aminophenyl coupling component which are particularly useful for dyeing cellulose esters and synthetic linear polymers such as polyamides, polyurethanes, polyvinyl chloride or polyesters and which have excellent light and wet fastness and resistance to gas-fume fading.