有机硅对水性紫外光固化生物基环氧树脂的改性  

Modification of ultraviolet-curable waterborne bio-based epoxy resin by organosilicon

作　　者：卢景威 许明生 刘华溪 彭文表 陈站 刘自力[1] 韦星船[1] 刘晓国 宋松林 LU Jingwei;XU Mingsheng;LIU Huaxi;PENG Wenbiao;CHEN Zhan;LIU Zili;WEI Xingchuan;LIU Xiaoguo;SONG Songlin(School of Chemistry and Chemical Engineering,Guangzhou University,Guangzhou 510006,China;不详)

机构地区：[1]广州大学化学化工学院,广东广州510006 [2]清远市柯林达新材料有限公司,广东清远511500 [3]广东德康化工实业有限公司,广东开平529331

出　　处：《电镀与涂饰》2020年第14期946-953,共8页Electroplating & Finishing

基　　金：清远市科技计划项目(2019DZX023);广州大学大学生创新训练项目(CX2019178);广州大学重点产学研项目(2018B013);江门市科技计划项目(2017110100090013910,2017240100050013877)。

摘　　要：以环氧树脂、衣康酸、柠檬酸、多种硅烷偶联剂为主要原料,经过开环、水解、脱水、接枝共聚等步骤,合成了多种有机硅改性水性紫外光固化生物基环氧树脂。探讨了反应温度对体系反应速率的影响,考察了中和剂种类、光引发剂种类及用量、硅烷偶联剂种类及用量对涂膜性能的影响。结果表明,当反应温度为100℃,中和剂为三乙胺,有机硅为乙烯基三乙氧基硅烷且其质量分数为环氧基的20%时,与未经改性的衣康酸-柠檬酸-环氧树脂相比,所制有机硅改性树脂及其涂膜性能良好:水接触角由41.497°增大到71.210°,铅笔硬度由H上升到6H,柔韧性由5 mm上升至2 mm,附着力1级,泡水24 h无明显变化。A variety of organosilicon-modified waterborne ultraviolet-curable bio-based epoxy resin was synthesized through ring-opening reaction,hydrolysis,dehydration,and graft copolymerization from epoxy resin,itaconic acid,citric acid,and a variety of silane coupling agent.The effect of reaction temperature on reaction rate of the system was discussed.The effects of the type of neutralizer,the type and amount of photoinitiator,the type and amount of silane coupling agent on the properties of the coating were studied.The results showed that the comprehensive performance of the resin prepared under the following conditions and its cured coating were excellent:reaction temperature 100℃,triethylamine as neutralizer,vinyltriethoxysilane 20%with respect to the mass of the epoxy groups.As compared with the unmodified itaconic acid-citric acid-epoxy resin,the organosilicon-modified resin had a water contact angle increased from 41.497°to 71.210°,a pencil hardness increased from H to 6 H,a flexibility increased from 5 mm to 2 mm,an adhesion of 1 grade,and no significant change after being immersed in water for 24 h.

关 键 词：生物基环氧树脂 有机硅 改性 紫外光固化 水性涂料 

分 类 号：TQ630.7[化学工程—精细化工]