Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1992-04-02
1994-11-15
Ball, Michael W.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
156 79, 264 466, 277 1, 342 2, H01Q 1700, F16J 1514
Patent
active
053645740
ABSTRACT:
A composition is disclosed for forming an EMI shielding gasket for instalion against a metal object, such as an aluminum frame member of an aircraft, wherein the composition is comprised of a mixture of a prepolymer composition of a flexible polyurethane material, a sacrificial metallic material which provides electrical conductivity and anodic protection against corrosion of the metal object, and a curing agent for curing the prepolymer composition. The sacrificial metallic material can be a metal salt selected from the group consisting of water soluble zinc and cadmium salts. Water can also be present to serve two functions, as a curing agent for the polyurethane and as a foaming agent, producing carbon dioxide. A method is also providing for installing an EMI shielding gasket on an aircraft between a graphite skin panel and a metal frame member. The composition for forming the EMI shielding gasket on a metal surface can also include an agent that cleans the metal surface to which the gasket is applied.
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Cooper, deceased John C.
Panayappan Ramanathan
Ball Michael W.
Edelberg Barry A.
McDonnell Thomas E.
Stemmer Daniel J.
The United States of America as represented by the Secretary of
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