The polyurethone prepolymer was used as thickener to thicken hydrol-terminated unsaturated polyester, and a new sheet molding compounds (SMC) of unsaturated polyester was prepared.

• 采用聚氨酯预聚物作增稠剂对带端羟基的不饱和聚酯进行增稠,制备出一种新型的不饱和聚酯片状模塑料(SMC),并研究了其增稠性能、增韧性能及贮存稳定性。