| abstract |
(57) [Summary] [Structure] A novel epoxy resin containing a norbornane ring is obtained by anionically polymerizing a norbornane compound containing an endocyclic epoxy group and an epithioethyl group bonded to the ring. [Effect] This epoxy resin can be cured by a conventional method, and since the cured product has a norbornane skeleton, hardness, It is excellent in strength, has low hygroscopicity, is superior in weather resistance to that having an aromatic ring, and has excellent electrical properties because it does not contain impurities such as Na and Cl, making it suitable for use as a sealing material for LSI and the like. ing. In addition, since it contains sulfur, it has a high refractive index, and may be used for optical applications. |