Polymer coatings and methods of applying same
AssigneeWestern Electric Company, Inc.
InventorLionell Graham
Life of this patent
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Abstract
Polymeric coatings can be applied to substrates such as metal foils by first coating the foil with a wetting hydrosol followed by applying a coupling agent thereto and thereafter coating the substrate with the desired polymer.
Claims16
In combination, a substrate and a polymer adhesion enhancing layer thereon comprises the substrate, a wetting hydrosol having a cationic constituent on at least one surface of the substrate and adherent thereto and a coupling agent on the hydrosol and adherent thereto, the cationic constituent of the wetting hydrosol being dissimilar to any metallic constituent of the underlying substrate.
A coated metal comprising a base metal, a monolayer of a hydrous oxide wetting hydrosol thereon having a cationic constituent different from the base metal, and a compatible coupling agent over the hydrosol.
A printed circuit board comprises a base metal, a hydrous oxide wetting hydrosol on at least one surface of the base metal, the hydrosol having a cationic constituent which is different from the base metal, a coupling agent therefor and a compatible polymeric coating thereover.
Dependencies are inferred from the claim text.