RESIN COMPOSITION FOR LASER ENGRAVING, PROCESS FOR PRODUCING RELIEF PRINTING PLATE PRECURSOR FOR LASER ENGRAVING, RELIEF PRINTING PLATE PRECURSOR, PROCESS FOR MAKING RELIEF PRINTING PLATE AND RELIEF PRINTING PLATE

摘要

Disclosed is a resin composition for laser engraving, comprising (Component A) a polyurethane having an ethylenically unsaturated group and having a number-average molecular weight of at least 5,000, (Component B) a compound having at least two isocyanate groups in the molecule, (Component C) a compound having at least two active hydrogens in the molecule, and (Component D) a thermopolymerization initiator.