Surface activity of the water-borne polyurethane product in aqueous solution was measured that the relative molecular weight of the PU-1 product is 3 650 and the cmc is about 27 g/L with the surface tension of 44 mN/m.

• 对该表面活性剂在水相中的表面活性进行了测试,所制得的非离子型水性聚氨酯表面活性剂(PU-1)的相对分子质量为3 650,其临界胶束浓度约为27 g/L,水溶液的最低表面张力为44 mN/m。