Coating composition of a blend of a glycidyl acrylic polymer and a reactive polysiloxane

Claim 1

A coating composition comprising about 10-80% by weight of a film forming binder and 20-90% by weight of a liquid carrier selected from the group consisting of organic solvent for the binder, aqueous liquid or a blend of solvent and nonsolvent for the binder; wherein the binder consists essentially of a blend of about a. 20-90% by weight, based on the weight of the binder, of an acrylic polymer consisting essentially of about 10-50% by weight, based on the weight of the acrylic polymer, of polymerized glycidyl methacrylate or glycidyl acrylate and 50-90% by weight of other polymerized ethylenically unsaturated monomers selected from the group consisting of alkyl methacrylate having 1-12 carbon atoms, alkyl acrylate having 1-12 carbon atoms, styrene, alkyl substituted styrenes and mixtures thereof and wherein the acrylic polymer has a weight average molecular weight of about 10,000-100,000, a number average molecular weight of about 2,000-20,000 and a molecular weight distribution of about 2-5 and a glass transition temperature of about 20°-50° C.; b. 10-80% by weight, based on the weight of the binder, of a crosslinkable polysiloxane having the following units: ##STR2## where R and R 1 are individually selected from the group consisting of alkyl group having 1-6 carbon atoms, hydroxyl group and phenyl group and contains sufficient hydroxyl groups to provide a silanol content of about 0.5-7% by weight.