摘要： 选用异佛尔酮二异氰酸酯(IPDI)、聚四氢呋喃二醇(PTMG)、二羟甲基丙酸(DMPA)及一缩二乙二醇(DEG)为主要原料,经相转化法合成了阴离子型水性聚氨酯(WPU)自乳化乳液;再加入过量胺开环的环氧树脂E-51,后扩链30 min,得到一系列状态稳定的环氧树脂E-51改性水性聚氨酯(EPU)乳液。并对乳液及胶膜进行了结构表征和性能测试,研究表明:环氧树脂E-51成功被乙二胺开环,用其改性水性聚氨酯,可以使胶膜的机械性能增强,24 h吸水率降至1.46%,硬度、耐热性能均得到较大提高。

关键词: 环氧树脂, 水性聚氨酯, 乙二胺, 改性

Abstract: The anionic waterborne polyurethane emulsion(WPU)was synthesized by the phase inversion process, using isophorone diisocyanate (IPDD), polytetramethylene glycol (PTMG), dimethyopropionic acid (DMPA)and diethylene glycol(DEG)as the main raw materials. The epoxy resins(E-51)modified by excess amine were added into the above WPU and stirred for the chain extension(30 min), to form a range of stable epoxy resins(E-51)modified WPU emulsions. The structure and performance of modified water become polyurethane emulsion and films were characterized and tested, which showed that epoxide group was successfully opened by ethylene diamine forming WPU and enhancing the mechanical properties, water absorption within 24 h reduced to 1. 46%. hardness and heat resistance were also improved.

Key words: epoxy resin, waterborne polyurethane, ethylene diamine, modify