| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermosetting resin composition which has high-breakdown-voltage insulation properties and is excellent in heat resistance and storage stability.SOLUTION: The thermosetting resin composition contains (A) a cyanate ester compound having two or more cyanato groups in one molecule, (B) a phenol curing agent containing a resorcinol type phenol resin, and (C) at least one compound selected from a tetraphenylborate salt of a tetrasubstituted phosphonium compound and a tetraphenylborate salt represented by formula (2). (Ris selected from a hydrogen atom, a 1-6C alkyl group, and a phenyl group, and n is an integer of 1-3.) |
