| abstract |
PURPOSE:To obtain a photopolymerizable composition having high sensitivity and superior stability by combinedly using a specified org. peroxide and a photosensitizer as a photopolymn. initiator. CONSTITUTION:This photopolymerizable composition contains a compound having an ethylenic unsatd. double bond and a photopolymn. initiator consisting of a polyperoxy-ester having a benzophenone group represented by formula I and 4, 4'-bis(dialkylamino)benzophenone represented by formula II. The com pound represented by the formula I may be 3, 3', 4, 4'-tetra-(tert- butylperoxycarbonyl)benzophenone. 4, 4'-Bis(dimethylamino)benzophenone or 4, 4'-bis(diethylamino)benzophenone is preferably used as the compound represented by the formula II. The compounds represented by the formulae I, II are preferable used by 1-30pts.wt. each per 100pts.wt. compound having an ethylenic unsatd. double bond. |