Patent ID: 7825198

Claim:
A thermosetting resin composition comprising: (A) a thermoplastic resin; and (B) a thermosetting resin, wherein the thermoplastic resin has a structure represented by the following general formula (a) and/or a structure represented by the following general formula (b) in which 5 to 99 mol % of hydroxyl groups of polyhydroxyether are esterified, R 1 represents C 1-18 aliphatic or aromatic-ring-containing alkylene group or —SO 2 —, R 2 in the formulas (a) and (b) comprises at least one selected from the group consisting of an acetyl group, propionyl group, butyryl group and isobutyryl group, 5 to 99 mol % of R 2 represent a straight chain or cyclic carbonyl group or aromatic carbonyl group having 1 to 20 carbon atoms, the residue 95 to 1 mol % represent a hydrogen atom, R 3 represents a hydrogen atom or a methyl group, with a proviso that a plurality of R 3 's is the same or different, said thermosetting resin contains (B-1) an epoxy resin having at least two epoxy groups in one molecule, and at least one epoxy curing agent selected from the group consisting of (B-2) a polyimide resin having a carboxyl group and a linear hydrocarbon structure having a number-average molecular weight of 300 to 6000, (B-3) a polyphenol resin having at least two phenolic hydroxyl groups, and (B-4) imidazole compounds.