An aqueous polyurethane dispersion and blocked PU hardner have been prepared. The PU baking varnish prepared with above materials has excellent water resistance and physico mechanical properties.

• 以预聚物混合法制备水性聚氨酯分散体，合成了封端的水性聚氨酯固化剂。用其配制的水性聚氨酯烘干清漆具有优良的耐水性和物理机械性能。