PHOTOPOLYMERIZABLE COMPOSITIONS

摘要

A photopolymerizable composition which comprises an addition-polymerizable compound having at least one ethylenically unsaturated double bond and a photopolymerization initiator system, characterized in that said photopolymerization initiator system essentially consists of: (a) a p-dialkylaminostyrene derivative or p-dialkylaminophenylbutadiene derivative represented by the general formula wherein R1 and R2 independently represent an alkyl group; Y represents a divalent atom or atomic group selected from the group consisting of -O-, -S- and -CH=CH- and forms aromatic heterocyclic ring B together with trivalent nitrogen atom, and ring A represents a benzene ring or naphthalene ring condensed with ring B, and n is 1 or 2; (b) a hexaarylbiimidazole; and (c) a thiol compound represented by the general formula wherein Z represents a divalent atom or atomic group selected from the group consisting of -O-, -S-, -NH- and