高触变性无填料水性环氧胶粘剂的制备与应用  

Preparation and application of filler-free waterborne epoxy resin with high thixotropy

作　　者：刘汉超 周永 李利伟 叶雨 张菁燕 LIU Hanchao;ZHOU Yong;LI Liwei;YE Yu;ZHANG Jingyan(Changzhou Architectural Research Institute Group Co.Ltd.,Changzhou 213000,China;Changzhou New North District Greening Department,Changzhou 213001,China;Changzhou Wujin District Highway Department,Changzhou 213100,China)

机构地区：[1]常州市建筑科学研究院集团股份有限公司,江苏常州213000 [2]常州市新北区绿化处,江苏常州213001 [3]常州市武进区公路处,江苏常州213100

出　　处：《新型建筑材料》2022年第3期118-122,共5页New Building Materials

基　　金：江苏省青年基金项目(BK20200181)。

摘　　要：采用PA和DEOA对环氧树脂E51进行改性,通过开环加成反应,在环氧树脂分子结构上引入羟基、叔胺以及酰胺键等极性基团,并具有亲水性。改性后的环氧树脂体系无需外加触变剂,加水混合后,树脂颗粒间的氢键相互作用可赋予体系优异的触变性。同时研究了反应温度、反应物摩尔比、原料种类等因素对高触变性无填料水性环氧胶粘剂性能的影响,得到最佳制备条件。试验结果表明,与固化剂混合后,该水性环氧胶粘剂具有优异的抗流挂性,固化物力学性能良好,实用性较高。The epoxy resin E51 was modified by PA and DEOA,and polar groups such as hydroxyl,tertiary amine and amide bond were introduced into the epoxy resin molecular structure through ring-opening addition reaction,presenting ideal hydrophilcity.The modified epoxy resin system does not need an external thixotropic agent.After mixing with water,the hydrogen bond interaction between the resin particles can endow the system with excellent thixotropy.The effects of the reaction temperature,type and molar ratio of reactants on the properties of the filler-free waterborne epoxy resin with high thixotropyare discussed and the optimal preparation conditions are obtained.The test results show that after mixing with the curing agent,the waterborne epoxy adhesive has excellent anti-sagging performance,good mechanical properties of the cured product,and high practicability.

关 键 词：环氧树脂 水性环氧胶粘剂 触变性 抗流挂 反应条件 

分 类 号：TU581[建筑科学—建筑技术科学]