| 摘要 |
PURPOSE:A resin composition excellent in heat resistance and curable with light, heat or electron beams, obtained by mixing a curable resin obtained from a polycyanate ester having a plurality of cyanato groups with a photocrosslinking monomer, a photosensitizer, a heat-curing catalyst, etc. CONSTITUTION:A polycyanate ester (A) having at least two cyanato groups in the molecule (e.g., 1,4-dicyanatobenzene) or its prepolymer is reacted with a compound (B) having both a 1,2-epoxy group and a radical-polymerizable double bond in the molecule (e.g., glycidyl acrylate) in such a ratio that 0.25-2 1,2- epoxy groups of component B are present per cyanato group of component A at 90-140 deg.C in the presence of a radical polymerization initiator. The produced curable resin is mixed with a photocrosslinkable monomer (prepolymer) and a photosensitizer (photopolymerization initiator) or a heat-curing catalyst (curing agent) to obtain the titled resin composition.
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