| 摘要 |
PURPOSE:To increase the hardness of a product cured by irradiation with light, by using a specified amino polymer in the titled composition comprising an ethylenically unsaturated monomer, an aromatic ketone and an amine. CONSTITUTION:A photopolymerization initiator is prepared by mixing an aromatic ketone (A) (e.g., benzophenone or acetophenone) with an amino polymer (B) of formula I or II (wherein R1 and R2 are each H or methyl, R3 and R4 are each a lower alkyl, m is 1-4 and n is a positive integer). This photopolymerization initiator is mixed with an ethylenically unsaturated monomer (e.g., methyl acrylate or polyethylene glycol monoacrylate) to obtain the purpose photocurable resin composition. The polymers of formula I or II can be obtained by polymerizing an amine having an ethylenically unsaturated group (e.g., dimethylaminethyl methacrylate).
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