Coatings derived from polyesters crosslinked with melamine formaldehyde
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United States of America Patent
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Oct 22, 2013
Grant Date -
Apr 18, 2013
app pub date -
Dec 7, 2012
filing date -
Mar 5, 1998
priority date (Note) -
In Force
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Abstract
A coating composition is based on a polyester mixed with an alkyl-etherified melamine formaldehyde. The coating composition is partially cured in a first stage to provide a thermoformable partially cured, tack-free, non-blocking, coating layer, followed by application to generally a contoured substrate and thermoforming to conform thereto. The contoured partially cured coating layer is then heat cured to form a cured coating. A hydroxyl-terminated polyoxetane containing repeat units derived from oxetane monomers having one or two pendent —CH2—O—(CH2)n—Rf groups, wherein Rf is partially or fully fluorinated, can be esterified with polyester-forming reactants to form a fluorinated polyoxetane-modified polyester.
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