Patent ID: 7538150

Claim:
A thermosetting resin composition which comprises: (A) 35 to 75 parts by weight of a thermosetting resin comprising a compound having a dihydrobenzoxazine ring as a main component; (B) 10 to 25 parts by weight of a polycondensation product of a phenol, a compound having a triazine ring and an aldehyde; and (C) 10 to 45 parts by weight of an epoxy resin, based on 100 parts by weight of a total amount of organic solid components of Components (A), (B) and (C); wherein at least a part of the epoxy resin comprises (i) a bisphenol F epoxy resin having a weight average molecular weight of 1,000 to 3,000, or (ii) a mixed epoxy resin of bisphenol F epoxy resin and bisphenol A epoxy resin having a weight average molecular weight of 1,000 to 3,000.