| 摘要 |
PROBLEM TO BE SOLVED: To obtain an epoxy resin composition excellent in stability during its storage. SOLUTION: This epoxy resin composition comprises (A) an epoxy resin, (B) a phenolic resin, (C) a filler composed of at least one kind of acidic metal element compound selected from the group consisting of aluminum oxide, silicon dioxide, silicon carbide, trisilicon tetranitride, boron nitride and boron carbide and satisfying the condition (α) described below: (α)ΔH/mC is 400-1,500kcal (ΔH is the heat of dissociation of the metal element oxide; (m) is the number of cations; C is the number of coordination to oxygen atom), and (D) curing promoter-contg. microcapsules having core/shell structure with its curing promoter core portion coated with polyurea shell portion.
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