Aqueous coating composition of an acrylic-vinyl oxazoline ester polymer
AssigneeE. I. Du Pont de Nemours and Company
InventorJoseph A. Vasta
Life of this patent
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Abstract
An aqueous coating composition having a film-forming binder of a polymer of (a) methyl methacrylate, styrene or a mixture of methyl methacrylate and styrene, (b) a vinyl oxazoline ester of drying oil fatty acids, and (c) and ethylenically unsaturated carboxylic acid; and contains sufficient ammonia or amine to provide a pH of about 7.5-9.5. The composition is a non-air polluting coating composition designed to be used as a finish for automobile and truck bodies.
Claims17
An aqueous coating composition comprising about a 5-60% by weight, based on the weight of the coating composition, of a film forming binder and 40-95% by weight, based on the weight of the coating composition, of an aqueous medium;
- wherein the film forming binder comprises a polymer consisting essentially of polymerized monomers of about
- (a) 22-28% by weight, based on the weight of the polymer, of styrene;
- (b) 22-28% by weight, based on the weight of the polymer, of methyl methacrylate;
- (c) 37-43% by weight, based on the weight of the polymer, of vinyl oxazoline ester of the formula ##STR4## where R is the residue of a drying oil fatty acid selected from the group consisting of soya oil fatty acids, linseed oil fatty acids, tall oil fatty acids or mixtures thereof;
- (d) 3-7% by weight, based on the weight of the polymer, of lauryl methacrylate;
- and
- (e) 3-7% by weight, based on the weight of an ethylenically unsaturated carboxylic acid selected from the group consisting of acrylic acid and metharylic acid;
- and containing sufficient ammonia or amine to provide a pH of about 7.5-9.5.
Dependencies are inferred from the claim text.