| 摘要 |
PURPOSE:To obtain the titled composition, consisting of an epoxy resin, curing agent, specific butadiene-styrene copolymer and inorganic filler and having a low elastic modulus and thermal stress as well as high insulation resistance without fear of deteriorating the glass transition temperature. CONSTITUTION:The aimed composition consisting of (A) an epoxy resin (preferably novolak type epoxy resin), (B) a curing agent for the epoxy resin (preferably novolak type resin), (C) liquid butadiene-styrene copolymer having carboxyl groups at both terminals (preferably 10-25mol.% styrene content) and (D) an inorganic filler (preferably fused silica or crystalline silica).
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