摘要： 为制备稳定性良好及高耐性的乳液型环氧固化剂，以三乙烯四胺、聚乙二醇二缩水甘油醚、环氧树脂 E51、邻甲苯缩水甘油醚为原料合成了一种非离子反应型乳化剂（ NIRE）；以二乙烯三胺或间苯二甲胺、环氧树脂 E20、苯基缩水甘油醚为原料合成了改性胺作为被乳化物（ ES）。利用 NIRE与 ES之间的疏水性差异，通过相反转法制得乳液型环氧固化剂（ WCA）并考察了 WCA固化的水性双组分环氧底漆的应用性能。采用红外光谱表征了 NIRE、ES的结构；探究，了制备 NIRE的最佳反应条件；并研究了 NIRE用量、乳化温度、剪切速度对 WCA性能的影响；以及 ES结构中胺的种类及封端率对 WCA应用性能的影响。结果表明：当 NIRE质量为 ES的 25%，乳化温度为 60 ℃，剪切速率为 2 000 r/min时，可制得粒径小、稳定性良好的 WCA，由其制备的水性双组分环氧底漆具有优异的附着力、耐水性和耐盐雾性。
关键词:
反应型乳化剂,
乳液型固化剂,
漆膜性能,
双组分,
水性环氧底漆
Abstract: In order to prepare emulsion epoxy curing agent with good stability and high resistance，a non-ionic reactive emulsifier（NIRE）was synthesized from triethylene tetramine，polyethylene glycol diglycidyl ether，epoxy resin E51 and o-cresol glycidyl ether. The diethylenetriamine or m-phenyldimethylamine，epoxy resin E20 and phenyl glycidyl ether were used to synthesize modified amines which was used as emulsified substances（ES）. An emulsion epoxy curing agent（WCA） was prepared by reverse transformation based on the hydrophobicity difference between NIRE and ES，and the application performance of WCA-cured two-component waterborne epoxy primer was investigated. The structures of NIRE and ES were characterized by infrared spectroscopy. The optimum reaction conditions for NIRE，the effects of NIRE dosage，emulsification temperature and shear rate on the WCA properties，and the effects of amines type in ES structure and the sealing rate on the application performance of WCA were studied. The results showed that when the NIRE dosage was 25% of ES，the emulsification temperature was 60 ℃，and the shear rate was 2 000 r/min，the obtained WCA had small particle size and good stability. The prepared two-component waterborne epoxy primer had excellent adhesion，water resistance and salt spray resistance.
Key words:
reactive emulsifier,
emulsion curing agent,
film properties,
two-component,
waterborne epoxy primer
中图分类号:
黄清华, 张豪, 李永康, 等. 乳液型环氧固化剂的制备与性能研究[J]. 涂料工业, 2024, 54(7): 53-59.