结合溶液聚合和乳液聚合的优点,采用两步聚合法合成了一种水性羟基丙烯酸树脂,所制备的水性树脂外观良好,黏度适中.动态光散射结果表明所合成的水性乳液平均粒径为122 nm,粒径分布均匀.利用傅里叶红外光谱(FT-IR)对合成水性树脂的结构进行表征,结果表明得到了预定结构的产物.差示扫描量热仪(DSC)表明两步聚合的产物的玻璃化温度均为30℃左右,与实验设计相符合.利用所合成的水性羟基丙烯酸树脂与氨基树脂R-717配制烘烤型水性清漆,FT - IR谱图验证了固化反应的发生.固化后的水性清漆性能测试结果表明,漆膜光泽高、硬度高、附着力好,耐冲击性能优异,耐水性和耐乙醇性较好,与国外同类产品制得的清漆性能相当,可应用于车架、机械零部件及卷尺等工业防腐装饰领域.
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