新型水性环氧树脂固化剂合成及性能的研究

采用新的合成方法合成了水性环氧树脂固化剂,初步探讨了该水性固化剂的性质。先将双酚A与环氧氯丙烷按质量比1∶2反应生成氯醚醇,再与二乙烯三胺发生胺解反应,形成类似于盐酸化的环氧胺加成物,又以单氯醚醇封闭活性高的伯胺氢,然后用NaOH脱除所有的HCl,再加入有机酸成盐,即形成水性环氧树脂固化剂。同样,将聚乙二醇与环氧氯丙烷反应,再与多胺反应,可将水溶性的链段引入固化剂中,不仅提高了固化剂的水溶性,而且改善环氧树脂的韧性。

Waterborne Epoxy Resin Curing Agent Synthesis and Properties

Waterborne epoxy resin curing agents were synthesized by a new method,and their properties are preliminary investigated. First,bisphenol A reacts with epichlorohydrin in the molar ratio of 1: 2,then aminolyzed with the diethylenetriamine( DETA) and a compound similar to epoxy-amine adduct is formed. The primary amine hydrogen with high activity in the adduct is capped with single chlorine ether alcohol and the HCl is removed off with NaOH. Finally,through adding the organic acid to neutrinize the amine partialy,the waterborne epoxy resin curing agent is obtained. Similarly,the polyethylene glycol reacts with epichlorohydrin and polyamine,then reacts with epoxy-amine adduct and a nonionized waterborne curing agent formed which can mprove the toughness of epoxy resin.