Patent ID: 8034442

Claim:
A prepreg made by impregnating a resin composition into a fiber reinforcing material, the resin composition comprising 50 to 60 parts by weight of an aromatic bismaleimide (A) containing 90% by weight or more of 4,4′-bismaleimide diphenylmethane or 3,3′-bismaleimide diphenylmethane or a mixture of these, 30 to 40 parts by weight of 4,4′-bis-(alkenylphenoxy)-benzophenone (B), 5 to 15 parts by weight of an alkenyl aromatic comonomer (C) and 1 to 10% by weight of a polyether imide or a polyimide containing the residue of phenylindane or a mixture of these (D) based on the total amount of (A), (B) and (C).