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US 5,344,672 AGranted
Process for producing powder coated plastic product
AssigneeSanderson Plumbing Products, Inc.
InventorDwight E. Smith
Life of this patent
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AssigneeSanderson Plumbing Products, Inc.
InventorDwight E. Smith
Estimating the term…
Plastic substrates, such as but not limited to phenolic cellulosic composites such as those used in conventional toilet seats, are heated at a temperature and for a time sufficient to degas the substrate, and are then coated with a powder, and heated to cure the powder coating. In a preferred embodiment, a water-based electrically conductive coating is first applied to a phenolic cellulosic composite, and cured while the substrate is heated to degas the substrate sufficiently, such that a subsequently applied powder coating will not suffer from popping during curing. In a preferred embodiment, it is not necessary for the part to be at a temperature at or above the cure temperature of the coating during application of the powder coating in order to avoid popping, provided the substrate has been sufficiently degassed.
A process of coating the surface of a plastic substrate, comprising the steps of:
A process of coating the surface of a preformed plastic substrate made of a phenolic cellulosic composite, comprising the steps of:
Dependencies are inferred from the claim text.