Aliphatic polyurathane emulsion was propared by the method of expanding chain after emulsing and influence of NCO%,COO%on the properties of polyurathane emulsion and film was discussed.

• 采用先乳化后扩链工艺合成脂肪族聚氨酯乳液，并讨论NCO%25，COO-%25对乳液及膜性能的影响，结果表明NCO%25越大，聚氨酯乳液膜的硬度越大，玻璃化转变温度越高；