聚醚型水性环氧树脂固化剂的合成

Synthesis of a polyether waterborne epoxy hardener

采用多乙烯多胺与低分子质量环氧树脂反应,并在其中引入聚醚和环氧树脂CYD-128合成的CYD-128改性聚醚链段,合成聚醚型水性固化剂,实验表明工艺可行。对CYD-128改性聚醚合成过程中各影响因素进行了研究,并对聚醚水性固化剂固化性能进行了评价。最佳配方与工艺为:选择分子质量为1 500的聚醚,环氧树脂与聚醚物质的量比为2∶1,催化剂选用BF3(60℃时加入)。与现有文献中报道的固化物性能相比,水性固化剂固化环氧体系的的柔韧性和附着力有大幅提高,硬度、光泽度和强度改变不大。

Polyether waterborne hardener was synthesized from polyethylene polyamine and low molecular weight epoxy resin and CYD - 128 modified polyether which was synthesized from CYD - 128 and polyether. The tests showed that the synthetic process was feasible. The effect of various conditions on synthesis reaction of polyether waterborne hardener was studied and the properties of synthetic product were evaluated. The optimum formula synthetic process were that Mw of polyether was 1 500, epoxy resin/polyether was 2：1 （mol rate）, BF3 was used as catalyst, and the reaction was carried at 60 ℃. The flexibility and adhesion of epoxy resin system cured by the novel polyether waterborne hardener prepared were greatly increased and its gloss, hardness and impact strength were same as that of system cured by common cure agent reported by some literatures.