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AkzoNobel patents coating composition

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By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

U.S. 8,133,953 B2
Akzo Nobel Coatings has received a patent for a coating composition comprised of a polyacrylate polyol obtained by polymerization of olefinically unsaturated monomers wherein at least 40% weight of the monomers is comprised of linear or branched alk(en)yl or alk(en)ylene groups having at least 4 carbon atoms, wherein the number average molecular weight (Mn) of the polyacrylate polyol does not exceed 5,000, and the polydispersity (Mw/Mn) is below 2.8; a polyester polyol obtained by esterification of building blocks having ester-forming functional groups wherein at least 30% weight of the building blocks is comprised of linear or branched alk(en)yl or alk(en)ylene groups with at least 4 carbon atoms per ester-forming functional group, the polyester polyol has a hydroxy value above 280 mg KOH/g and a hydroxy functionality of at least 2, an isocyanate-functional crosslinker, and a volatile organic diluent, wherein at least 60% weight of the volatile organic diluent comprises alk(en)yl or alk(en)ylene groups having at least 4 carbon atoms, wherein the non-volatile content of the coating composition is higher than 50% weight based on the total composition.

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