| 摘要 |
PURPOSE:To prepare a photopolymerizable composition sensitive to argon laser, etc., by compounding an addition-polymerizable ethylenic unsaturated compound with a photopolymerization initiator composition comprising specific thiohydantoin derivative and triazine derivative. CONSTITUTION:(A) A compound having one or more addition-polymerizable ethylenic unsaturated double bonds, is compounded with (B) a photopolymerization initiator composition comprising (a) 5-[(arene-oxazol-2-ylidene)ethylidene]- 2-thiohydantoin I or II [X is H, (substituted)alkyl, alkoxy, (substituted)aryl, halogen, etc.; R<1>, R<2> and R<3> are (substituted)alkyl, alkenyl, (substituted) aryl, etc.], and (b) a 2,4,6-substituted-1,3,5-triazine III (at least one of R<4>-R<6> is mono-, di- or trihalogen-substituted methyl), and if necessary (C) a binder.
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