Epoxy resin curing agent capable of improving anti-ultraviolet performance of epoxy resin and preparation method for epoxy resin curing agent

The invention provides an epoxy resin curing agent capable of improving the anti-ultraviolet performance of epoxy resin and a preparation method for the epoxy resin curing agent. The epoxy resin curing agent is obtained by reacting ultraviolet adsorbent molecules 2-hydroxy-4-(2,3-ethylene oxide glycidyl ether)-diphenyl ketone with diethylenetriamine, and the molecular structure of the epoxy resin curing agent is formed by connecting at least one ultraviolet adsorbent molecule 2-hydroxy-4-(2,3-ethylene oxide glycidyl ether)-diphenyl ketone to each diethylenetriamine molecule. After the epoxy resin is cured by the prepared epoxy resin curing agent, the anti-ultraviolet performance of the cured epoxy resin can be improved, and the weather resistance of the epoxy resin is improved. 本发明提供了种具有改进环氧树脂抗紫外线性能的环氧树脂固化剂及其制备方法，该环氧树脂固化剂由紫外线吸收剂分子2-羟基-4-(2,3-环氧乙烷缩水甘油醚)-二苯甲酮与二乙烯三胺反应得到，该环氧树脂固化剂的分子结构为每个二乙烯三胺分子上至少连接个紫外线吸收剂分子2-羟基-4-(2,3-环氧乙烷缩水甘油醚)-二苯甲酮。本发明制得的环氧树脂固化剂在对环氧树脂进行固化后，能够提高固化后的环氧树脂的抗紫外线性能，使环氧树脂的耐候性得到提高。