POLYAZO DYES WITH DIAZO COMPONENTS OF THE AMINOPHENOL AND THE AMINO DIPHENYL-SULFIDE, -SULFOXIDE OR -SULFONE SERIES

摘要

Polyazo dyes useful for dyeing leather in the free form or as copper, chromium, iron, cobalt or nickel complexes have the formula <IMAGE> where m is 0, 1 or 2, n is 0 or 1, p is from 1 to 2, q is from 0 to 1, and R1, R2, R3, R4, R5, R6, R7, X, Y and the ring A are each as defined, and may be prepared from aniline derivatives of the formula <IMAGE> where m is 0, 1, or 2, n is 0 or 1, and X, R1, R2 and R3are each as defined.