环氧丙烯酸酯低聚物制备过程若干影响因素

在不同阻聚剂用量、投料比、投料方式等条件下合成环氧丙烯酸酯.对合成产物进行了红外光谱分析.制备了紫外光固化涂料,测定了固化膜的凝胶质量分数.结果表明,阻聚剂用量增加有利于提高酯化反应程度及固化膜凝胶质量分数,但当阻聚剂用量达到1.0%(质量分数)时酯化程度降低、固化膜凝胶质量分数降低.反应物中环氧树脂稍过量有利于提高酯化反应程度;当n(Er)∶n(AA)为1∶2.0时固化膜凝胶质量分数最高.将丙烯酸与催化剂、阻聚剂预先混合后再加入到环氧树脂中的投料方式有利于提高合成产物的酯化程度.

Some Influencing Factors on Preparation Process of Epoxy Acrylate Oligomer

The epoxy acrylate was synthesized with different amounts of inhibitor, feed ratios and feeding modes. The UV-curing coating was prepared, with the gel content in cured film measured. The results indicated that the esterification is improved with increasing content of inhibitor, but when the amount of inhibitor is up to 1.0%, the gel content of cured film decreases with esterification weakened. Slightly excessive content of epoxy in reactant is beneficial to improving the esterification. When the feed ratio n (Er):n (AA) is 1:2.0, the gel content in cured film comes up to maximum. The feeding mode that the acrylic acid, catalyst and inhibitor are premixed together and then added into epoxy is advantageous to improving the esterification of the synthesized product.