摘要： 以四乙烯五胺(TEPA)作为反应底物,与低相对分子质量的环氧树脂(DER331)和聚乙二醇二缩水甘油醚(PGGE)混合树脂反应,再用单环氧封端剂苯基缩水甘油醚(PGE)和十二至十四烷基缩水甘油醚(AGE)作为复合封端剂进行封端,合成非离子复合型水性环氧固化剂。探究了最佳合成条件,采用红外光谱(FT-IR)对合成的产物进行结构表征,并考察了与水性环氧乳液固化后的涂膜性能。结果表明:最佳合成条件为物料比n(伯胺基)∶n(环氧基)=2.3∶1、初始反应温度65℃、反应时间3 h、复合封端剂的比例n(AGE)∶n(PGE)=3∶7。合成的水性环氧固化剂与水性环氧乳液固化形成的漆膜耐腐蚀性能优越。

关键词: 非离子, 复合型, 水性环氧固化剂, 复合封端剂

Abstract: Non-ionic composite waterborne epoxy curing agent was synthesized by a reaction of tetraethylenepentamine(TEPA) with mixed resin of low molecular weight epoxy resin ( DER331 ) and poly glycoldiglycidyl ether(PGGE) and then blocked by composite sealing agent comprising phenyl ether(PGE)and alkyl(cp-c)glycidyl ether( AGE). The optimum synthesis conditions were investigated. The structure of the product was characterized by infrared spectroscopy(FT-IR ) and the properties of the cured film were also investigated. The results showed that the optimal conditions were as follows: the molar ratio of primary amine and epoxy group was 2. 3: 1; the initial reaction temperature was 65 C; the reaction time was 3 h and the ratio of AGE to PGE was 3: 7. Whereby, the film based on the synthesized curing agent and waterborne epoxy emulsion exhibited good corrosion resistance.

Key words: waterborne curing agent, epoxy resin, composite blocking agents