Adherent coating for resinous substrates

April 5, 2011

Patent No. U.S. 7,763,679 B2

E.I. du Pont de Nemours and Company has been granted a patent for a coating composition that when applied over a resinous substrate produces an adherent coating. The composition is comprised of a crosslinkable component comprised of a polymeric mix containing at least one crosslinkable copolymer polymerized from a monomer mixture comprised of one or more ethylenically unsaturated monomers having on average 1 to 10 hydroxyl groups and a saturated hydrocarbon polymer, wherein the monomer mixture is comprised of in the range of from 70 parts to 99 parts of the ethylenically unsaturated monomers and 1 part to 30 parts of the saturated hydrocarbon polymer, all in parts by weight based on 100 parts by weight of the crosslinkable component; and a crosslinking component comprised of cycloaliphatic polyisocyanate of the formula: R1—(R2—NCO)n wherein R1 is a substituted or unsubstituted cycloaliphatic group containing 3 to 20 carbon atoms in the ring, R2 is independently selected from a direct bond, a straight aliphatic group or branched aliphatic group, wherein the aliphatic group has from 1 to 6 carbon atoms, and wherein n ranges from 2 to 10.