One step method of applying polysiloxane and PTFE coating composition
AssigneeMaterial Sciences Corporation
InventorEdmund J. Kuziemka
Life of this patent
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Abstract
Fast curing resin coating compositions for coating metal surfaces and a one-step method are described. The coatings comprise a high molecular weight epoxy resin, although a portion thereof may be low molecular weight, an effective amount of a cross-linking agent for the epoxy resin, a polysiloxane resin system, an effective amount of a curing agent for the polysiloxane fluid system, a fluorocarbon polymer, and the balance being suitable solvents. The coatings are applied in one-step and dry in less than one minute and may be formed into various shapes and forms useful for stovetop cookware.
Claims15
A one-step method of applying a fast curing resin coating composition to a metal substrate comprising:
- applying a thin film directly to said metal substrate,
- said thin film containing an epoxy resin having a molecular weight measured by gel permeation chromatography in the range of from about 300 to about 200,000 present in the range of from about 10% by weight to about 20% by weight of said composition,
- not less than about 85% of the epoxy resin having a molecular weight in the range of from about 50,000 to about 200,000,
- an effective amount of a cross-linking agent for the epoxy resin,
- a polysiloxane resins system present in the range of from about 2% by weight to about 7% by weight of said composition,
- an effective amount of a curing agent for the polysiloxane resins system,
- polytetrafluoroethylene present in the range of from about 4% by weight to about 15% by weight of said composition, and
- the balance being suitable solvents,
- the film having a dry thickness in the range of from about 0.7 mils to about 1.2 mils, and
- curing the coating by heating the metal substrate to a temperature in the range of from about 450.degree. F. to about 480.degree. F. for a time of not greater than about one minute.
Dependencies are inferred from the claim text.