Patent ID: 7049349

Claim:
A thermosetting composition, consisting essentially of at least one epoxy resin modified by at least one aromatic polyarnine, said resin being formed from at least one polyepoxide containing at least two primary amine groups in its molecule, the mole ratio of the polyamine to the epoxide being such that each amine group corresponds to 1.6 to 2.6 epoxy groups, said epoxy resin constituting at least about 90% by weight of any mixture with a thermoplastic polymer selected from the group consisting of polyethersulfones, polyamines, polyimides and polyarylsulfones; and at least one pore-forming agent or the degradation product or products of said pore-forming agent incorporated in the composition in at least a sufficient amount to impart a lower thermal conductivity to the composition, said thermosetting composition prior to being set has a dynamic viscosity, from several hundred to several thousand centipoises, thereby enabling it to be processed by pumping, injection and/or molding.