A method for the preparation of an aqueous polyurethane emulsion

摘要

Provided is a method for producing a polyurethane (PU) emulsion having good solvent resistance and water resistance and having good compatibility with other aqueous emulsions to give stable mixtures with them. The method comprises reacting (A) a PU prepolymer having an isocyanate group in the molecule, (B) a modified PVA having at least one member selected from the group consisting of an amino group, a primary hydroxyl group and an acetoacetyl group and (C) a low-molecular compound having an amino group and/or a hydroxyl group, in an aqueous medium.