Process for applying fluoropolymer powder coating as a primer layer and an overcoat
AssigneeE.I. du Pont de Nemours and Company
InventorCraig King Hennessey
Life of this patent
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Abstract
A process for forming a release surface on a substrate includes applying a primer powder on the substrate to form a primer layer, applying an overcoat powder on the primer layer to form an overcoat layer, and baking the substrate after applying both the primer powder and the overcoat powder. The primer powder includes a tetrafluoroethylene/perfluoroolefin copolymer and a non-melt processible binder. The overcoat powder includes a tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer.
Claims21
A process for forming a release surface on a substrate, the process comprising:
- applying a primer powder on the substrate to form a primer layer, wherein the primer powder comprises a tetrafluoroethylene/perfluoroolefin copolymer and a non-melt processible binder,
- applying an overcoat powder on the primer layer to form an overcoat layer, wherein the overcoat powder comprises a tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer, and
- baking the substrate after applying both the primer powder and the overcoat powder.
The process of claim 101 wherein the inorganic filler includes mica flake, silicon carbide, carbon black, barium sulfate, ultramarine blue, mixed metal oxide pigment, aluminum oxide, or any combination thereof.
Dependencies are inferred from the claim text.