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PPG patents waterborne coating

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By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

Patent No. U.S. 7,473,442 B2
PPG Industries has been granted a patent for a method of coating a plastic substrate comprised of mixing together a first component of a coating composition and a second component of a coating composition to form a mixture thereof, wherein the first component is comprised of an aqueous dispersion comprised of an aliphatic polycarbonate-polyurethane polymer; and an acrylic polyol having a number average molecular weight of 500 to 4,000; and the second component is comprised of a material having functional groups reactive with the functional groups of the acrylic polyol and/or the polycarbonate-polyurethane polymer; applying the mixture to the plastic substrate; and allowing the mixture to coalesce to form a substantially continuous film on the substrate, wherein the plastic substrate is constructed of polyvinyl chloride, acrylonitrile butadiene styrene, and/or polycarbonate.

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