Photosensitive resin composition containing diazodiphenylamine-aldehyde condensate

摘要

The invention provides a novel photosensitive or photocurable resin composition suitable for the preparation of a planographic printing plate exhibiting excellent performance in development with an aqueous alkaline development solution as well as good ink-respectivity to form the image areas on the printing plate and high durability in printing . The resin composition comprises an acrylic copolymer and a diazo compound as the essential ingredients and the acrylic copolymer is composed of the recurring monomer units derived from alkyl esters of acrylic or methacrylic acid, from acrylonitrile or methacrylonitrile and from acrylic or methacrylic acid as the comonomers in limited proportions.