Coated metal conductors

Abstract

Abstract Coated metal conductors are made by coating the conductor with a polyimide resin and prepolymers which are prepared by the reaction of a tetra ester of benzophenonetetracarboxylic acid (or anhydride) and a tetraamine. The prepolymers thus prepared may be dissolved in a solvent such as chloroform or benzene, sprayed onto the surface of a polyimide film, and cured to a tack-free but pressure-sealable fusible state by the application of heat. Polyimide films thus coated may then be placed together on their adhesive faces and sealed under heat and pressure. The adhesives of this invention are able to withstand the same high temperatures that the polyimide films can. Thus, the sealed films are useful in such applications as wire insulation and contour cable where temperatures of from 600*-800* F. are encountered.

Inventors

• 👤 Norman Bilow

Bibliographic Details