| 摘要 |
In photopolymerizable composition that contains, as the essential constituents, (a) a polymeric binder, (b) a polymerizable compound, and, (c) as the photoinitiator, a 2,3-dihydro-1H-cyclopenta(b)quinoline represented the formula <IMAGE> in which R1 is a substituted or unsubstituted m-valent, carbocyclic aromatic or heterocyclic aromatic radical, R2 is a hydrogen atom, an alkyl group, an aryl group, an aralkyl group or an aralkenyl group, R3 and R4 are identical or different, and each denotes a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group, n is 0 or 1, and m is 1 or 2, the photoinitiator possesses an excellent initiating action, resulting in high image resolution.
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