Non-stick coating composition
AssigneeWhitford Worldwide Company
InventorsThomas J. Bate, Arthur Wachowski, Jan Wilhelm Ernst Moos
Life of this patent
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Abstract
A non-stick coating composition comprising a waterborne phenoxy resin, a crosslinker, and a silicone compound. The coating is substantially free of fluorocarbon resin. An article, such as aluminum, may be coated with the composition. The composition may be multi-layers, but only the layers other than the first layer includes the silicone compound. The invention includes the method for applying the coating or coatings.
Claims36
A coated article comprising a metal substrate in the form of a metal shaped article or a metal sheet, said metal substrate coated with at least one layer of a coating composition comprising the product of a mixture of at least one waterborne phenoxy resin, at least one crosslinker, and at least one silicone compound, said coating composition being substantially free of fluorocarbon resin and including, on the basis of total solid resins, 30-85 wt. % phenoxy resin, 0-15 wt. % epoxy, 8-25 wt. % crosslinker and 5-70 wt. % silicone compound.
A method of coating a metal substrate comprising the steps of:
- providing a metal substrate in the form of a metal shaped article or a metal sheet;
- applying at least one layer of a coating composition to the metal substrate, the coating composition comprising at least one waterborne phenoxy resin, at least one crosslinker, and at least one silicone compound, the coating composition being substantially free of fluorocarbon resin and including, on the basis of total solid resins, 30-85 wt. % phenoxy resin, 0-15 wt. % epoxy, 8-25 wt. % crosslinker and 5-70 wt. % silicone compound;
- and
- curing the coating composition.
A coated article comprising a metal substrate coated with a coating system comprising:
- a metal substrate in the form of a metal shaped article or a metal sheet;
- a first coating composition applied as a first layer to said metal substrate, said first coating composition comprising the product of a mixture of at least one waterborne phenoxy resin and at least one crosslinker;
- and
- a second coating composition applied as a second layer over said first coating composition, said second coating composition comprising the product of a mixture of at least one waterborne phenoxy resin, at least one crosslinker, and at least one silicone compound and being substantially free of fluorocarbon resin, said second coating composition including, on the basis of total solid resins, 30-85 wt. % phenoxy resin, 0-15 wt. % epoxy, 8-25 wt. % crosslinker and 5-70 wt. % silicone compound.
A method of coating a metal substrate comprising the steps of:
- providing a metal substrate in the form of a metal shaped article or a metal sheet;
- applying at least one layer of a first coating composition to the metal substrate, the first coating composition comprising the product of a mixture of at least one waterborne phenoxy resin and at least one crosslinker;
- optionally curing the first coating composition;
- applying at least one layer of a second coating composition over the first coating composition, the second coating composition comprising the product of a mixture of at least one waterborne phenoxy resin, at least one crosslinker, and at least one silicone compound and being substantially free of fluorocarbon resin, the second coating composition including, on the basis of total solid resins, 30-85 wt. % phenoxy resin, 0-15 wt. % epoxy, 8-25 wt. % crosslinker and 5-70 wt. % silicone compound;
- and
- curing the second coating composition.
Dependencies are inferred from the claim text.