水性羟基丙烯酸乳液的制备及在双组分水性聚氨酯涂料中的应用  

Preparation of Waterborne Hydroxyl Acrylic Emulsion and Its Application in 2K Waterborne Polyurethane Coatings

作　　者：李虎 雷鸣 湛辅城 范晔 LI Hu;LEI Ming;ZHAN Fu-cheng;FAN Ye(Shandong,Nuohu Coating Co.,Ltd.,Jinan 250103,Shandong,China;Wuhan Twin Tigers Coatings Co.,Ltd.,Wuhan 430070,Hubei,China)

机构地区：[1]山东诺虎涂料有限公司,济南250103 [2]武汉双虎涂料有限公司,武汉430070

出　　处：《中国涂料》2019年第5期49-54,共6页China Coatings

摘　　要：以甲基丙烯酸羟乙酯(HEMA)、苯乙烯(St)、丙烯酸正丁酯(n-BA)、甲基丙烯酸甲酯(MMA)和丙烯酸(AA)为主单体,以过硫酸铵(APS)为引发剂,十二烷基二苯醚二磺酸为乳化剂,碳酸氢钠为缓冲剂,通过半连续乳液聚合工艺合成了双组分水性聚氨酯涂料用丙烯酸乳液。探究了丙烯酸单体用量、Tg、引发剂(APS)用量和乳化剂用量对乳液及涂膜性能的影响。结果表明当丙烯酸单体用量占单体总量的1%(质量分数,后同)、APS占单体总量的1%、乳化剂占3%、Tg设计为30℃时,合成的水性羟基丙烯酸乳液制备双组分聚氨酯涂料,其涂膜附着力好、耐水性好,铅笔硬度可达2H。An acrylic emulsion for 2K waterborne polyurethane coatings was synthesized via semi-continuous emulsion polymerization method. Hydroxyethyl methacrylate(HEMA), styrene(St), acrylic acid(AA), n-butyl acrylate(n-BA) and methyl methacrylate(MMA) were used as the main monomers, dodecyl diphenyl ether disulfonic acid as emulsifier, and sodium bicarbonate as buffer. The influence of dosage of AA, T_g, and the dosage of initiator(APS) and emulsifier on properties of emulsion and film performance were investigated. The results show that when the AA content accounts for 1% of the total amount of monomers(weight percentage, the same below), APS accounts for 1%, the emulsifier accounts for 3% and Tg is set at 30 ℃, the 2K polyurethane coatings synthesized with waterborne hydroxyl acrylic emulsion have good adhesion, water resistance and the pencil hardness of 2H.

关 键 词：乳液聚合 高羟值 丙烯酸乳液 双组分聚氨酯涂料 

分 类 号：TQ630.4[化学工程—精细化工]