Novel metallized dyes, their manufacture and use

摘要

The present invention relates to copper, nickel, chromium or cobalt complexes of azo or azomethine dyes which contain a group of the formula -N=N=Ar)m-1Z-R2-U wherein Z is a bridge member of the formula <IMAGE> wherein R1 is hydrogen or a low molecular alkyl group, R2 is a low molecular alkylene radical or an arylene radical, Ar is an arylene radical, m is 1 or 2 and U is a sulpho or carboxy group.