new compounds, azo pigments cobaltiferes asymetriques 1: 2, their preparation and their application as colorants

摘要

Novel asymmetric 1:2 cobalt complexes corresponding to the formula IMAGE in which the individual variables have the meaning given in Patent Claim 1, are obtained by reacting the nitrite-containing 1:1 cobalt complex of the sulpho group-containing monoazo component with the metal-free monoazo compound. The dyestuff complexes are suitable for dyeing and printing organic nitrogen-containing substrates, in particular natural or synthetic polyamides, polyurethanes and also leather, or for colouring metals.