Patent ID: 7122599

Claim:
A polymeric coating or molding composition having anti-adhesion and dirt repellency properties, comprising: (a) a branched polymer having a weight-average molecular weight of from 2000 to 200,000 and having cross-linking groups; (b) a polymer resin having cross-linking groups; wherein the branched polymer comprises a polymeric base molecule, having polydiorganosiloxane side chains with a weight-average molecular weight of between 1000 and 30,000; wherein the polydiorganosiloxane is from 5 to 25% by weight of the total weight of the branched polymer; wherein the branched polymer is from 0.1 to 10% by weight based on the total weight of the solids content of the coating composition; wherein the cross-linking groups of the branched polymer are within the polymeric base molecule and are functional groups of one or more monomers selected from the group consisting of acrylonitrile, (meth)acrylic acid, hydroxyalkyl (meth)acrylate, epoxyalkyl (meth)acrylate, isocyanatomethyl (meth)acrylate, isopropenylcumyl isocyanate and the olefinic acid ester of hydroxyalkyl (meth)acrylate, wherein the olefinic acid is selected from the group consisting of maleic anhydride, trimellitic anhydride, succinic anhydride, phthalic anhydride and (meth)acrylic acid; wherein the cross-linking groups of the polymer resin are one or more functional groups selected from the group consisting of pendant hydroxy groups, pendant olefinic groups, pendant carboxy groups and pendant amine groups; and, wherein the branched polymer and polymer resin are cross-linked to form the coating or molding composition displaying anti-adhesion and dirt repellency properties.