Disperse mono- and bisazo dyes derived from 2-amino-4,5-dicyanoimidazole

Abstract From the Canadian patent

Azo dyes or the generic formula wherein R1 an aliphatic group, W is a divalent group of the 1,4-phenylene or 1,4-naphthylene series m is 0, or 1, and A is a coupling component selected from 1) a 5- or 6-membered heterocyclic ring containing nitrogen or oxygen in the ring and having an amino, oxo or hydroxy, substituent 2) a naphtholyl group, and, 3) an aromatic amine having no substituents in the 4-position to the amino group and at least one aliphatic or cycloaliphatic substituent attached to the amino nitrogen.