| 摘要 |
PURPOSE: To prevent troublesome yellow coloring due to the migration of a photoinitiator from a photopolymerizable coating by using a photopolymerizable compd. represented by a specified formula. CONSTITUTION: This photopolymerizable compd. is represented by formula I, wherein R<1> is a group represented by formula II, R<2> is H or methyl, R<1> and R<2> may form an optionally substd. 5- or 6-membered carbon ring, R<3> is H, methyl or optionally substd. phenyl, R<4> is H, methyl optionally substd. benzoyl, etc., (n) is 0 or 1 and X is H, Cl, 1-4C alkyl, etc. The migration of a photoinitiator from a photopolymerizable coating is suppressed and a photoset coating has higher mechanical resistance and strength.
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