Copper complexes of substituted sulfophenyl-azo-phenyl-azo-naphthalene sulfonic acids containing a heterocyclic fiber-reactive group

Abstract

Complexes of the formula ##STR1## WHEREIN V is hydroxy or amino, one of X.sub.1 and X.sub.2 is sulfo and the other is --NHR.sub.3, wherein R.sub.3 is heterocyclyl containing at least one substituent cleavable as an anion, preferably a halopyrimidyl or halotriazinyl group, Y is methyl, methoxy, ethoxy or methoxyethoxy, Z is hydrogen, methyl or methoxy, M is 0 or 1, and N is 2 or 3, WITH THE PROVISO THAT THE --N.dbd.N-- and --O--Cu--O-- groups are bound to adjacent positions of the naphthalene ring, are useful for the dyeing or printing of natural or regenerated cellulosic fibres. The obtained dyeings and prints possess notable stability in alkaline medium and fastness to light and satisfactory fastness to wet treatments, chlorine and peroxide. The dyes possess notable build-up and fixation.

Dependencies are inferred from the claim text.