Photopolymerizable composition for the production of flexographic printing forms for corrugated board printing

摘要

A photopolymerizable composition for the preparation of flexographic printing forms for corrugated board direct printing comprising a radial (polystyrene-polybutadiene)_nX block copolymer, with XSn or Si and n2 or 4, with an average molecular weight (M_w) of 80,000-300,000, a molecular weight distribution (M_w/M_n) of 1.00-1.40, a content of di- block copolymers of less than 15% by weight, which is extended with up to 50% by weight of a paraffinic oil.