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A thermosetting coating composition of a urethane polymer has film-forming constituents of an organic polyisocyanate, a polymer of polymerized ethylenically unsaturated monomer units which contains pendant hydroxyl-containing groups, and a hydroxyl-containing alkyd plasticizer. The composition can b

A thermosetting coating composition of a urethane polymer has film-forming constituents of an organic polyisocyanate, a polymer of polymerized ethylenically unsaturated monomer units which contains pendant hydroxyl-containing groups, and a hydroxyl-containing alkyd plasticizer. The composition can be applied at industrially-acceptable cure temperatures and volume-solids levels to form a durable film.

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A curable coating composition comprising 10-70% by volume of a polymer blend and a solvent for the polymer blend wherein the polymer blend consists essentially of: (a) 15-50% by weight, based on the weight of the blend, of an organic polyisocyanate; (b) 10-70% by weight, based on the weight of the b

A curable coating composition comprising 10-70% by volume of a polymer blend and a solvent for the polymer blend wherein the polymer blend consists essentially of: (a) 15-50% by weight, based on the weight of the blend, of an organic polyisocyanate; (b) 10-70% by weight, based on the weight of the blend, of a polymer having a backbone of (i) polymerized ethylenically unsaturated monomers and (ii) polymerized ethylenically unsaturated ester units that form ester groups, attached to the backbone, of the formula [Figure] wherein R1 is a saturated hydrocarbon radical having 2-10 carbon atoms and wherein the primary-hydroxyl content of the polymer is 0.5-4.4% by weight, based on the polymer, and; (c) 15-40% by weight, based on the weight of the blend, of an alkyd resin plasticizer which is the reaction product of a glyceride of a saturated fatty acid, a dihydric alcohol, and a derivative of a dicarboxylic acid selected from the group consisting of anhydrides, dialkyl esters, and mixtures of these, wherein the reaction product has a primary-hydroxyl content of 1.0-4.4% by weight, based on the reaction product, and wherein the coating composition is curable at ambient temperatures.