４，４′－二羟基二苯基丙烷与环氧氯丙烷，在ＢＦ３ＯＥｔ２催化剂作用下，反应生成端羟基酚氧树脂，与蓖麻油混合，用３种异氰酸酯（ＴＤＩ、ＩＰＤＩ和ＨＤＩ）作固化剂，制得一系列交联聚氨酯，研究了这３种聚氨酯的动态力学性能。结果表明，它们都有一个玻璃化转变温度，组分相容性好，改变ＮＣＯ／ＯＨ摩尔比和蓖麻油／酚氧树脂的质量比，可制得一系列具有阻尼性能好的浇注型聚氨酯材料。 4,4’-dihydroxydiphenylpropane and epichlorohydrin react with BF3OEt2 catalyst to form hydroxy-terminated phenolic resin, which is mixed with castor oil and cured with three kinds of isocyanates (TDI, IPDI and HDI) , A series of crosslinked polyurethanes were prepared. The dynamic mechanical properties of the three polyurethanes were studied. The results show that all of them have a glass transition temperature, good compatibility of the components. By changing the mass ratio of NCO / OH and castor oil / phenoxy resin, a series of cast polyurethane materials with good damping properties can be obtained .