| 摘要 |
PROBLEM TO BE SOLVED: To obtain an epoxy resin composition improved in rapid curability and storage stability and giving a cured product improved in heat resistance, water resistance, and electrical properties by selecting a liquid epoxy resin composition comprising an epoxy resin, a curing agent, a cure accelerator, and, optionally, other adjuvants, wherein the cure accelerator is a specified imidazoline compound or an adduct thereof with an isocyanate. SOLUTION: The cure accelerator used is at least one compound selected from the group consisting of an adduct of an imidazoline compound represented by formula I with an isocyanate, a bisimidazoline compound represented by formula II, and an adduct thereof with an isocyanate. In formula I, R1 is hydrogen, a 1-17C alkyl, or a (substituted) phenyl; and R2 and R3 are each hydrogen, a 1-5C alkyl, phenyl, or benzyl. In formula II, R4 to R7 are each hydrogen, a 1-5C alkyl, phenyl, or benzyl; and n is an integer of 2-10. When the composition needs to have storage stability, it is desirable that the respective compounds are used in the form of organic acid salts.
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