Thiazole diaza cyanine dye substances

摘要

Cationic dyestuffs of the formula IMAGE wherein R1 represents a lower alkyl, alkenyl or hydroxyalkyl radical, R2, R3, R5 and R6 represent hydrogen or a lower alkyl or alkenyl radical, R4 represents a lower alkyl, alkenyl or alkoxy radical and X-represents an anion, are suitable for dyeing and printing natural and synthetic materials, in particular polyacrylonitrile and acid-modified polyamides and polyesters.