摘要： 分别通过溶液聚合、乳液聚合和两步聚合法制备了3种水性羟基丙烯酸树脂(PAS、PAE、PAT),采用傅里叶变换红外光谱(FT-IR)、动态光散射(DLS)和示差扫描量热法(DSC)对所合成树脂进行了表征。在无催化剂存在的条件下,分别将3种水性树脂与异氰酸酯固化剂Bayhydur XP 2655以及助剂混合得到双组分水性聚氨酯清漆,通过红外光谱对固化后清漆结构进行了表征,并对3种水性清漆的性能进行了研究。实验结果表明基于PAT的水性清漆综合性能较优。
关键词:
双组分水性聚氨酯,
水性羟基丙烯酸树脂,
聚合方法
Abstract: Three kinds of waterborne hydroxyl acrylic resin(PAS, PAE and PAT)were prepared through solution polymerization, emulsion polymerization and two -step polymerization method respectively. The structures of resins were characterized by fourier transfer infrared(FT-IR), dynamic light scattering(DLS) and differential scanning calorimeter(DSC). The hydroxyl acrylic resins were mixed with hydrophilically modified polyisocyanate curing agent (Bayhydur XP 2655) respectively in the absence of catalyst to obtain a 2K waterborne polyurethane(2K-WPU) coatings. FT-IR was employed to investigate the structure of the cured coatings. Comparisons of properties of 2K -WPU coatings based on these three different resins were conducted which showed that the PAT -based coating gave better comprehensive properties.
Key words:
2K-WPU,
waterborne hydroxyl acrylic resin,
polymerization method
许 飞, 张小利, 胡 中, 陈卫东, 庄振宇, 张汉青, 朱 柯, 祝宝英. 聚合方法对水性羧基丙烯酸树脂及相应2K-WPU性能的影响[J]. 涂料工业, 2012, 42(7): 1-5.
Xu Fei, Zhang Xiaoli, Hu Zhong, Chen Weidong, Zhuang Zhenyu, Zhu Ke, Zhu Baoying. Effect of Synthetic Process on Properties of Waterborne Hydroxyl Acrylic Resin and the Corresponding 2K-WPU[J]. Paint & Coatings Industry, 2012, 42(7): 1-5.