| 摘要 |
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: (a) at least one sensitizer selected from the group consisting of a compound of the formula: <CHEM> wherein ring A is a substituted or unsubstituted benzene or naphthalene ring, X is a bivalent atom or bivalent group, R<1> is an alkyl group, each of R<2> and R<3> is hydrogen, an alkyl group, an alkoxy group or an alkylthio group, or R<1> and R<2> bond to each other, and l is 0, 1 or 2, a compound of the formula: <CHEM> wherein R<1> and R<2> are as defined above, Ar is an aromatic group, and each of n and m is 0 or 1, a compound of the formula: <CHEM> wherein R<1>, R<2>, R<3>, ring A, X and l are as defined above, R<4> is hydrogen, an acetyl group or <CHEM> wherein R<1>, R<2>, R<3> and l are as defined above, and R<5> is an alkyl group, and a compound of the formula: <CHEM> wherein R<1>, R<2>, R<3>, X and l are as defined above, and (b) at least one activator capable of generating active radicals when irradiated in the presence of said sensitizer. f |
