预聚物法制备喷涂聚氨酯弹性体研究

The Study on Spray Polyurethane Elastomers by the Prepolymer Method

本文以MDI、HMDI、IPDI、二胺扩链剂、端氨基聚醚、端羟基聚醚等为主要原料用预聚物法制备了双组分喷涂聚氨酯弹性体。探索了配方中异氰酸酯种类、NCO的含量、不同扩链剂和不同端羟基聚醚等因素对聚氨酯弹性体的影响。通过改变预聚体中多异氰酸酯类型及NCO的含量，调节配方中软硬段质量分数，选择聚醚多元醇和端氨基聚醚种类，以及合理搭配不同的扩链剂，可以制得不同性能的聚氨酯弹性体材料。

Spray Polyurethane Elastomers were preprepared with 4. 4＇- methylene diphenyl dissocyanate （MDI）, ey- cloaliphatic diisocyanate （HMDI）. IPDI. diamine extender, amine terminated polyether. Polyether and they were prepared by prepolymerization. The effect factors on Spray Polyurethaneureas Elastomers were studied by the types of isocyanate,the content of NCO,different chain extenders and hydroxyl--terminated polyether, in prepolymer by changing the type of polyisoeyanate and the NCO% content,adjust the formula mass fraction of soft and hard segments,by choicing the types of polyethe and the amine terminated polyether as well as reasonable with different chain extender, have a different performance of polyurethane elastomer material.