Weather-resistant polymeric coating
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United States of America Patent
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Issued Date -
Mar 4, 2004
app pub date -
Sep 4, 2002
filing date -
Sep 4, 2002
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Abstract
A weather-resistant polymeric coating is applied to an aluminum alloy body by coating a surface portion of the body with a primer composition comprising a vinylphosphonic acid-acrylic acid copolymer to form a primer layer, followed by coating the primer layer with a weather-resistant polymeric coating composition. The aluminum alloy body preferably comprises an aluminum alloy extrusion containing an alloy of the AA5000 or AA6000 series. The coating composition preferably contains a cyano modified saturated carboxylated polyester or a zinc rich epoxy, each preferably applied by powder coating.
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