Polyazo dyes with multiple fiber-reactive vinyl sulfone groups in one molecule.

摘要

A polyazo compound of the following formula, CHEM wherein A is phenylene, naphthylene or alkylene, X is -NR2R3, -OR4 or -SR5 in which R2, R3, R4 and R5 are each hydrogen, alkyl, phenyl, naphthylene or benzyl, Z is -SO2CH=CH2 or -SO2CH2CH2Z min in which Z min is a splittable group, R1 is hydrogen or alkyl, and F is polyazo dye moiety carrying a fiber reactive group like that represented by Z, which compound is useful for dyeing or printing fiber materials to obtain a product dyed or printed in a color superior in various fastness properties with superior build-up property.