AQUEOUS POLYURETHANE RESIN

摘要

An aqueous polyurethane resin having an Si atom content of 0.05 to 1.5 wt% can be produced by at least reacting an isocyanate-terminated prepolymer which contains a polyoxyethylene group in an amount of 1 to 15 wt% in a side chain branched from the main chain and has two or more isocyanate groups at the terminus of the main chain with a chain extension agent which comprises at least a compound having two or more active hydrogen groups reactive with an isocyanate group and an alkoxysilyl group.