Water-dispersible urethane polymers and aqueous polymer dispersions
AssigneeTextron Inc.
InventorsRoy C. Williams, David R. Rogemoser
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Abstract
Aqueous dispersions of polyurethane polymers in ammonium salt form are prepared by reacting diisocyanates with a polyhydroxy, carboxylic acid to form an isocyanate-terminated prepolymer that is united with an unsaturated fatty acid ester polyol to provide carboxylic-containing, water-dispersible polyurethanes having properties exhibited by organic solvent-based, oil-modified polyurethanes. The aqueous dispersions can be formed by neutralization of "oil-modified," carboxylic group-containing, water-dispersible polyurethanes with ammonium salt-forming materials such as ammonia and amines. The aqueous dispersions are especially desirable coating compositions.
Claims27
A carboxylic group-containing, oil-modified, urethane polymer composition comprising the reaction product of ethylenically-unsaturated fatty acid ester polyol of drying or semi-drying fatty acid having up to about 22 carbon atoms, and isocyanate-terminated, urethane prepolymer of hydrocarbon diisocyanate and dihydroxy alkanoic acid.
A stable, aqueous dispersion of an organic solvent solution of an oil-modified urethane polymer, said urethane polymer being an ammonia or amine salt of a carboxylic group-containing, oil-modified urethane polymer composition comprising the reaction product of ethylenically-unsaturated fatty acid ester polyol of drying or semi-drying fatty acid having up to about 22 carbon atoms, and isocyanate-terminated, urethane prepolymer of hydrocarbon diisocyanate and dihydroxy alkanoic acid.
Dependencies are inferred from the claim text.