摘要
针对水性丙烯酸酯乳液耐酸性差的问题,以环氧树脂为改性剂,甲基丙烯酸甲酯为硬单体、丙烯酸丁酯/丙烯酸乙酯为功能单体,采用预乳化工艺和半连续种子乳液聚合法合成了一种新型乳液.利用红外光谱、热重分析仪、流变仪等分析了环氧树酯的改性效果,并采用正交实验优化了改性乳液、AES、PEG-400和OBSH对复合乳液涂料的固含量、润湿性和耐酸性能的影响.结果表明,当环氧树脂含量为2. 62%时,水性乳液的热稳定性较好,固含量达到44. 4%.复合乳液涂料最佳工艺配方为:水性丙烯酸酯乳液(150 g)、改性乳液(15 g)、AES(10 g)、PEG-400(1 g)、OBSH(0. 6 g).以环氧树脂改性乳液配制的复合乳液涂料漆膜亲水性得到明显改善,室温下可耐酸168 h,浸酸失重不高于1%.
Aiming at the poor acid resistance of waterborne acrylate emulsion,a novel emulsion taking the epoxy resin as a modifier,methyl methacrylate(MMA)as a hard monomer and butyl acrylate(BA)/ethyl acrylate(EA)as a functional monomer was synthesized with the pre-emulsification process and semi-continuous seed emulsion polymerization method.The modification effect of epoxy resin was analyzed with the infrared spectroscopy(FT-IR),thermogravimetric analyzer(TGA)and rheometer.In addition,the influence of modified emulsion,AES,PEG-400 and OBSH on the solid content,wettability and acid resistance of composite coating was optimized through orthogonal test.The results showthat the thermal stability of waterborne emulsion is optimal when the content of epoxy resin is 2.62%,and the solid content reaches 44.4%.The optimum technological formula of composite emulsion coating is waterborne acrylate emulsion(150 g),modified emulsion(15 g),AES(10 g),PEG-400(1 g)and OBSH(0.6 g).The hydrophilicity of lacquer film of composite emulsion coating prepared with epoxy resin modified emulsion is obviously improved,and the composite emulsion coating can resist acid 168 h at the room temperature.Furthermore,the acid loss weight of composite emulsion coating is less than 1%.
作者
张爱玲
张萌
张楠
崔叶莎
ZHANG Ai-ling;ZHANG Meng;ZHANG Nan;CUI Ye-sha(School of Science,Shenyang University of Technology,Shenyang 110870,China)
出处
《沈阳工业大学学报》
EI
CAS
北大核心
2019年第3期263-267,共5页
Journal of Shenyang University of Technology
基金
沈阳市科技计划项目(F16-154-9-00)
关键词
水性乳液
环氧丙烯酸酯
涂层
耐酸性
流变性
固含量
润湿性
半连续种子乳液聚合法
waterborne emulsion
epoxy acrylate
coating
acid resistance
rheological property
solid content
wettability
semi-continuous seed emulsion polymerization method
