Weatherable solar reflector
AssigneeMinnesota Mining and Manufacturing Company
InventorJohn L. Roche
Life of this patent
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Abstract
Solar reflector comprising an opaque, specular metalized polymeric foil protected from corrosion and weathering by a layer of an interpolymer of (1) lower acrylate and/or methacrylate monomers and (2) minor amounts of ethylenically unsaturated lower carboxylic acid monomers.
Claims6
A solar reflector comprising a flexible support sheet having a smooth face, an opaque, specular metallic layer, on the order of at least 0.08 to 0.1 micrometer thick, firmly bonded to said face, and a thin, transparent weather-resistant protective polymeric layer bonded to said metallic layer so as to be exposed to the environment, said polymeric layer comprising an interpolymer of monomers consisting essentially of (a) 98.0-99.5% of acrylic ester monomers selected from the class consisting of lower acrylates and lower methacrylates and (b) 2.0-0.5% of carboxylic acid monomers selected from the class consisting of acrylic acid, methacrylic acid, itaconic acid and maleic acid.
Dependencies are inferred from the claim text.