Water-borne epoxy resin curing agent and preparation method thereof

The invention disclsoes a water-borne epoxy resin curing agent and a preparation method thereof., The method comprises the following steps: uniformly mixing m-xylylenediamine, ethylenediamine, 1-methylpyrrolidine-3-carboxylic acid, N-methyl pyrrolidone, phenyl glycidyl ether and trimethylolpropane triglycidyl ether, carrying out a reaction at 60-80 DEG C for 4 h or more, dropwise adding epoxy resin into the mixture, reacting at 60-100 DEG C for 5-9 hours, and then adding deionized water at 100 DEG C, thereby obtaining the product. The carboxyl is introduced into the 1-methylpyrrolidine-3-carboxylic acid, so that the carboxyl is grafted on the epoxy resin, the intolerance of the product to illumination is improved, and the service life of the product is prolonged. 本发明公开了一种水性环氧树脂固化剂及其制备方法，该方法包括以下步骤：将间苯二甲胺、乙二胺、1-甲基吡咯烷-3-羧酸、N-甲基吡咯烷酮、苯基缩水甘油醚、三羟甲基丙烷三缩水甘油醚混合均匀，60-80℃反应4h以上，将环氧树脂滴加混合物中，于60-100℃反应5-9h，然后于100℃加入去离子水，即可。1-甲基吡咯烷-3-羧酸引入羧基，使环氧树脂上枝接羧基，提高了本发明对光照的不耐性，延长了本发明的使用寿命。