Patents

Polyurethane Coatings with Improved Adhesion

January 14, 2014

U.S. 8,541,059 B2
PRC-DeSoto International has obtained a patent for a polyurethane coating composition comprised of (a) an isocyanate component comprised of 70 to 99 weight percent of an aliphatic isocyanate, wherein the aliphatic isocyanate is comprised of polymeric hexamethylene diisocyanate; and 1 to 30 weight percent of of an aromatic isocyanate, wherein the aromatic isocyanate is comprised of polymeric methylene diphenyl diisocyanate; wherein weight percent is based on the total solids weight of the isocyanate component; and b) a polyol component comprised of 40 weight percent to 80 weight percent of a hard acrylic polyol; 10 weight percent to 40 weight percent of a soft acrylic polyol; and 5 weight percent to 30 weight percent of a polyester polyol; wherein weight percent is based on the total solids weight of the polyol component; and wherein the coating composition cures at room temperature.

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