摘要:
An aqueous dispersion of a water-dispersible polyurethane having pendent fluoroalkyl groups, said polyurethane being the product of chain extending, in aqueous medium, a water-dispersible, isocyanate-terminated polyurethane prepolymer having pendent fluoroalkyl groups.
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 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 polymer dispersion containing a vinyl polymer and a nonionic water-dispersible polyurethane having pendent polyoxyethylene chains, the vinyl polymer having been formed by the free radical polymerization of at least one vinyl monomer in the presence of an aqueous dispersion of the polyurethane. The dispersions are useful as coating compositions.
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.
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:
Aqueous polyurethane dispersions useful as coating compositions wherein the polyurethane comprises the reaction product of(a) an isocyanate-terminated polyurethane prepolymer containing carboxylic acid salt groups formed by reacting:(i) a polyisocyanate component containing at least 1% by weight of diphenylmethane-2,4'-diisocyanate, and(ii) an active hydrogen containing component containing a polyol and a carboxy group containing diol or triol, and(b) an active hydrogen containing chain extender.