Unsymmetrical azo - azo methine 1:2 chromium complex dyes

Abstract

1:2 Chromium complex dyes which contain one molecule of an azo or azomethine compound of the formula ##STR1## and one molecule of the azomethine compound of the formula ##STR2## COMPLEXED TO A CHROMIUM ATOM, IN WHICH FORMULAE A represents the radical of a diazo component of the benzene or naphthalene series, which carries the complex-forming group XH in ortho-position to the azo group, B represents the radical of a coupling component which couples in ortho-position to HX' or the radical of an aromatic o-hydroxyaldehyde, Z represents a nitrogen atom or the -CH group, X represents an oxygen atom or a -CO-O group, X' represents an oxygen atom, a NH group, a low molecular N-alkyl, N-aralkyl or N-aryl group, and R represents a substituted or unsubstituted aliphatic or cycloaliphatic radical, And the benzene ring a can carry a further fused benzene ring or can be substituted by halogen, nitro, alkyl and alkoxy, in particular by low molecular alkyl and alkoxy, and these compounds contain together 0 to 5 water-solubilizing groups and optionally a group of the formula --N.dbd.N--Ar--N.dbd.N--Ar' (3) and/or one to two groups of the formula --N.dbd.N--Ar" (4) wherein Ar, Ar' and Ar" represent an aromatic, carbocyclic or heterocyclic radical. These dyes are primarily suitable for dyeing natural and synthetic polyamide material.

Dependencies are inferred from the claim text.