Patent ID: 7906213

Claim:
An epoxy resin curable composition for a prepreg, comprising the following components (A) to (E): (A): 1 to 90% by mass of a polyamide compound represented by the following formula: wherein: R represents an alkylene group having 2 to 10 carbon atoms, a cycloalkylene having 6 to 18 carbon atoms, an arylene group, or an alkylidene-diarylene group having 13 to 25 carbon atoms; said alkylene, cycloalkylene, arylene, or alkylidene-diarylene groups are optionally substituted by a halogen atom, a hydroxyl group, or an alkyl group having 1 to 4 carbon atoms; and n is a positive number; (B): 1 to 50% by mass of an epoxy resin; (C): 0.1 to 5% by mass of an imidazole compound as an epoxy resin curing agent; (D): 1 to 95% by mass of spherical silica or spherical molten silica having an average particle diameter ranging from 0.1 to 20 μm; and (E): 10 to 70% by mass of a solvent.