| 摘要 |
<p>PURPOSE:The titled composition useful as printing ink, etc., having reactivity to argon laser, and high sensitivity, obtained by blending a polymerizable unsaturated compound with a photopolymerization initiator consisting of a specific benzoylmethylene benzothiazolone and a trisubstituted triazine. CONSTITUTION:In producing a photopolymerizable composition by blending a polymerizable compound containing an ethylenic unsaturated bond with a photopolymerization initiator, a combination of a benzoylmethylene benzothiazolone shown by the formula I [R<1> and R<2> are H, (substituted)alkyl, (substituted)aryl, or aralkyl; X is substituent group having -0.9-+0.5 sigma (sigma) value of Hammett; Y is H, (substituted)alkyl, (substituted)aryl, etc.] and a 2, 4, 6-substituted-1, 3, 5,-triazine compound shown by the formula II[R<3>, R<4>, and R<5> are H, (substituted)aklyl, (substituted)aryl, etc.] is used as a photopolymerization initiator.</p> |
