Patent ID: 8217099

Claim:
A thermosetting resin composition comprising: (1) at least one epoxy resin having an imide group in its molecular structure, wherein said at least one epoxy resin is capable of undergoing polymerization with bismaleimide and occupies 1.75%-18.0% solids weight of the composition; (2) at least one bismaleimide compound, wherein said at least one bismaleimide compound occupies 0.15%-12.5% solids weight of the composition; (3) a radical initiator, wherein said radical initiator is provided in a mole fraction amount of 0.01%-0.15%, based on the total of epoxy resin and bismaleimide compounds; (4) an inhibitor, wherein said inhibitor is provided in a mole fraction amount of half to double the amount of said initiator, based on the total of epoxy and bismaleimide compounds; (5) at least one styrene-maleic anhydride copolymer, wherein said at least one styrene-maleic anhydride copolymer occupies 17.5%-47.0% solids weight of the composition; (6) at least one filler, wherein said at least one filler occupies 20%-60% solids weight of the composition; (7) at least one solvent, wherein said at least one solvent occupies 30%-50% weight of the composition; (8) at least one flame retardant.