Structural materials and components
AssigneeInternational Harvester Company
InventorsJohn Gagliani, Raymond Lee
Life of this patent
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Abstract
High density structural ("blocking") materials composed of a polyimide filled with glass microballoons. Structural components such as panels which have integral edgings and/or other parts made of the high density materials.
Claims10
A blocking material or the like which comprises a polymide foam having uniformly distributed therethrough glass microballoons of a size and in an amount which is effective to increase the screw withdrawal effectiveness of the polyimide, said polyimide being a copolyimide containing two primary diamines, one of said diamines being heterocyclic and having nitrogen in the ring and the other of said diamines being a para- or meta- substituted aromatic diamine which is free of aliphatic moieties.
A blocking material or the like which comprises a polyimide foam having uniformly distributed therethrough glass microballoons of a size and in an amount which is effective to increase the screw withdrawal effectiveness of the polyimide, said polyimide being a terpolyimide containing three diamines, one of said diamines being heterocyclic and having nitrogen in the ring, another of said diamines being a para- or meta-substituted aromatic diamine which is free of aliphatic moieties, and the third of said diamines being aliphatic.
Dependencies are inferred from the claim text.