Method of producing adherent metallic film

Details Method of producing adherent metallic film Method of producing adherent metallic film

C - Chemistry, Metallurgy

23

C

117/159, 117/90

C23C 18/20 (2006.01) C23C 4/02 (2006.01) C23C 18/28 (2006.01) C23C 18/32 (2006.01)

Patent

CA 1263929

METHOD OF PRODUCING ADHERENT METALLIC FILM ABSTRACT A method of producing an adherent metallic film for a thermoplastic or thermoset polymeric substrate to provide radio frequency shielding of electromagnetic interference. The polymeric substrate is prepared for application of the metallic film by application of a primer. The primer is an organic-based coating having a dispersion of silica gel to enhance the microscop- ic surface area and improve adhesion. The silica gel has an average particle size of approximately- microns and forms 2-10% of the mixture by weight. A catalyst may be added to the primer to promote curing. The metallic film is preferably zinc and may be applied by either flame or arc spraying technique, or electroless plating of the primed surface.

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