摘要:
An aqueous dispersion of a nonionic, water-dispersible polyurethane having pendent polyoxyethylene chains and free acid or free tertiary amino groups. The dispersions are useful as coating compositions.
摘要:
An aqueous polymer dispersion containing a water-dispersible polyurethane and a vinyl polymer, the polyurethane being the product of reacting an active hydrogen containing chain extender with a water-dispersible isocyanate-terminated polyurethane prepolymer derived from a polyisocyanate component containing at least 5% by weight of 2,4'-diphenylmethane diisocyanate. The dispersions are useful as coating compositions.
摘要:
An aqueous dispersion of a water-dispersible polyurethane, said polyurethane comprising the reaction product of:(a) a water-dispersible isocyanate-terminated polyurethane prepolymer having an NCO content of 2.1 to 10% by weight,(b) an organic polyisocyanate having an average isocyanate functionality of 2.1 to 4.0, and(c) an active hydrogen-containing chain extender.
摘要:
An aqueous dispersion of a nonionic water-dispersible polyurethane having pendent polyoxyethylene chains and one crosslink per 3,000 to 100,000 atomic weight units. The dispersions are useful as coating compositions.