| 摘要 |
PURPOSE: To obtain a resin composition which has excellent properties for prepregs and can give a laminate by mixing a normally solid epoxy resin with an epoxy resin curing agent, a specified diluent and a photopolymerization initiator. CONSTITUTION: This composition comprises a normally solid epoxy resin (desirably of a molecular weight of 500 or above), an epoxy resin curing agent, a diluent comprising a photopolymerizable and heat-polymerizable monomer [e.g. desirably one comprising a photopolymerizable and heat-polymerizable monomer having at least one (meth)acryloyl group and at least one glycidyl group in the molecule] and a photopolymerization initiator. This composition can be infiltrated into a fibrous material without leaving any bubbles in the material, the impregnated material can be converted into a prepreg simply by irradiation with an actinic radiation, and the obtained prepreg can be made tack-free without any thermal curing reaction. Therefore, this prepreg is flexible, does not form rein dust, is capable of being wound around e.g. a roll and is very clean. |
