Mitsubishi Chemical Corporation

Masaaki Tsuchiyama

Toshiyuki Urano

Hideki Nagasaka

Hiroshi Ide

A photopolymerizable composition comprising an addition polymerizable compound having at least one ethylenically unsaturated double bond and a photopolymerization initiator system, wherein the photopolymerization initiator system comprises:

Photopolymerizable composition

A photopolymerizable composition comprising at least an addition polymerizable compound having at least one ethylenically unsaturated double bond and a photopolymerization initiator system, which system comprises (a) a sensitizer of the formula (I): ##STR1## wherein each of R.sup.1 to R.sup.6 is hydrogen, halogen, alkyl, aryl, aralkyl, acyl, alkoxycarbonyl, optionally substituted hydrocarbon ring, optionally substituted heterocyclic residue or --SO.sub.3 --R.sup.8, wherein R.sup.8 is hydrogen, alkyl, aryl, aralkyl, alkali metal, or quaternary ammonium, R.sup.7 is hydrogen, alkyl, aryl, aralkyl, optionally substituted hydrocarbon ring, or optionally substituted heterocyclic group, each of X.sup.1 and X.sup.2 is halogen, alkyl, aryl, aralkyl, optionally substituted hydrocarbon ring, or optionally substituted heterocyclic group, and (b) a titanocene compound.

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Machida, Japan

Masaaki Tsuchiyama