影响MDI体系聚氨酯弹性体性能的因素  

Affecting Factors of Property of PU Elastomer Based on MDI

作　　者：刘锦春[1] 段有顺[1] 

机构地区：[1]青岛科技大学高分子科学与工程学院橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《塑料工业》2006年第7期4-7,共4页China Plastics Industry

摘　　要：采用半预聚物法合成了以聚醚二元醇、4,4′-二苯基甲烷二异氰酸酯(MDI)、1,4-丁二醇和2,4-/2,6-二氨基-3,5-二甲硫基甲苯(DMTDA)等为主要原料的双组分浇注型聚氨酯弹性体。研究了不同多元醇种类、半预聚体中—NCO基团质量分数、不同扩链剂种类及其不同配比、异氰酸酯指数等影响MDI体系聚氨酯弹性体的因素。结果表明,采用PTMG/MDI/DMTDA半预聚物法制备的弹性体具有优良的物理性能及工艺性能。Two-pack PU elastomer was prepared by means of quasi-prepolymer process, with polyether glycol, 4,4′-diphenylmethane diisocyanate （MDI）, 1,4 - BDO and 3,5 -dimetylthio toluene diamine （DMTDA） as raw materials. The key affecting factors, such as the variety of polyols, the mass percentage of free -NCO group in the quasi-prepolymer, the variety and proportion of different chain extenders and isocyanate index, of the physical and mechanical properties of polyurethane elastomer were discussed. The results indicated that the elastomer of PTMG/ MDI/DMTDA by quasi-propolymer process had good mechanical and technological properties.

关 键 词：聚氨酯弹性体 MDI DMTDA 半预聚物 

分 类 号：TQ334[化学工程—橡胶工业] TQ323.8