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US 9,850,395 B2Granted
Polymer coated metallic substrate and method for making
AssigneeAK Steel Properties, Inc.
InventorFrederick Alan Myers
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AssigneeAK Steel Properties, Inc.
InventorFrederick Alan Myers
Estimating the term…
A composite material comprising a metallic substrate and a coating on at least one side of the metallic substrate, wherein the coating comprises an acrylic or styrene-acrylic based polymer and is less than about 0.2 mils thick, wherein the polymer has a molecular weight of 50,000 to 1,000,000, a glass transition temperature (Tg) of 50-80° C., and comprises 90-100 wt. % of the total solids in the coating. The method of applying a coating to a metal substrate using a manifold flood and squeegee roll configuration or alternatively roll coater techniques; wherein the roll hardness, shape, pressure and speed are chosen to ensure that the coating composition forms a continuous wet film on the metallic substrate surfaces when the strip travels at up to 600 feet per minute; and the wet film has a uniform thickness of 2 mil (0.002 inch) or less.
A composite material comprising a metallic substrate and a coating on at least one side of the metallic substrate, wherein the coating comprises an acrylic or styrene-acrylic based polymer and has a dried thickness of less than about 0.2 mils, wherein the polymer has a molecular weight of 125,000 to 1,000,000, a glass transition temperature (Tg) of 65-80° C., and comprises 90-100 wt. % of the total solids in the coating, and further wherein the composite material is formable into a 1 inch deep drawn modified Swift cup without galling, flaking, peeling, or powdering, and the coating has a coefficient of friction of less than 0.5 and a weight of 50 to 350 mg/sq ft.
Dependencies are inferred from the claim text.