Colored polymers from azo dye monomers containing olefinic groups

摘要: A colored polymer containing repeat units derived from at least one azo dye which is free water-solubilizing groups and contains polymerizable olefinically unsaturated group has the formula: A--N═N--E wherein represents residue of a carbocyclic or heterocyclic diazotisable amine electron-withdrawing substituent E coupling component with proviso that when both are carbocyclic, does not contain nitro chloro except another different also present, each being attached to carbon atom forming part E.