Graft polymer with unsaturated lateral chains, photosensitive mixture containing said graft polymer and recording material produced therefrom

摘要

Disclosed is a graft polymer comprising a polyurethane graft backbone and grafted-on chains comprising vinyl alcohol units and units with lateral styrylpyridinium or styrylquinolinium groups, and also a photocurable mixture comprising the graft polymer and a photosensitive compound, such as a photosensitizer of a negative-working diazo compound. The mixture is suited for the production of printing plates, in particular planographic printing plates, and photoresists. Printing plates prepared from the mixture are distinguished by high photospeed, good developability with aqueous solutions and long print runs.