摘要： 采用低相对分子质量的环氧树脂E-51与聚醚-4000反应制备环氧改性聚醚加成物,再与多乙烯多胺进行反应制备胺封端的聚醚-环氧-胺加成物,最后采用单环氧化合物进行封端,合成非离子型水性环氧固化剂,实验表明工艺可行。对环氧E-51改性聚醚-4000合成过程中的各影响因素进行了研究,并对非离子型水性环氧固化剂的固化性能进行了评价。最佳配方与工艺为:n(环氧树脂E-51)∶n(聚醚-4000)>2∶1,催化剂选用含三氟化硼(BF3)质量分数2%的乙醚溶液(60℃时加入,加入量为2%)。与现有的市售水性环氧固化剂固化性能相比,非离子型水性环氧固化剂固化的环氧体系的柔韧性和耐冲击性有大幅提高。

关键词: 多乙烯多胺, 聚醚, 水性固化剂, 环氧树脂

Abstract:

The epoxy modified polyether adduct was prepared from polyether-4000 and low molecular weight epoxy resin E-51, which was then reacted with polyethylene polyamine to form anamine -terminater polyether-epoxy-amine adduct, then terminated with mono-epoxy compound to form the nonionic curing agent for waterborne epoxy. The results showed that the synthesis process was feasible. The effect virous factors on synthesis reaction of the epoxy modified polyether compound was studied and the curing performance of the final curing agent were evaluated.

The optimum formula and synthetic process were as follows:the mass ratio between epoxy resin E-51 and polyether was more than 2: 1, and 2% of boron trifluoride in ether solution was added as catalyst at 60℃.Compared with the curing performance of existing commercial waterborne epoxy curing agent, the flexibility and impact resistance of epoxy resin system cured by the nonionic waterborne epoxy curing agent are greatly improved.

Key words: polyethylene polyamine, polyether, waterborne hardener, epoxy resin