Aqueous PUA dispersion based on aromatic isocyanate was prepared with blocked prepolymer.The blocking agent with enol keto stucture( BAEK) .diethyl malonate( DEM) , was used to prepare the dispersion.

• 采用具有烯醇结构的封端剂,用反应活性较高的芳香族异氰酸酯制备了聚氨酯-丙烯酸酯(PUA)水分散液。