高性能丙烯酸树脂分散体的制备及应用研究

Preparation and application of high performance acrylic resin dispersion

采用分段滴加的方法制备具有核壳结构的羟基丙烯酸树脂,并通过相反转的方法制得水性丙烯酸树脂分散体。采用硬度测试仪、膜厚仪、黏度计和圆柱轴弯曲试验仪等对分散体的硬度、厚度、黏度和冲击性等进行了测试。研究结果表明:当选择硬软单体的比例为4∶3、m(过氧化苯甲酰)∶m(过氧化2-乙基己酸叔丁酯)=1∶1、m(甲基丙烯酸羟乙酯)∶m(甲基丙烯酸羟丙酯)=4∶5、单体滴加时间控制在4.0 h、选择N,N-二甲基乙醇胺为中和剂且中和度为100%时,合成的羟基丙烯酸树脂分散体的性能相对最优。该分散体既可以制备烘烤型涂料,又可以制备双组分自干型涂料。通过检测,发现其涂料涂层具有良好的硬度、干性、光泽、耐水性能以及优异的耐化学性能,可适用于各类工业防腐领域。

Hydroxy acrylic resin with core-shell structure was prepared by subsection dropping method,and waterborne acrylic resin dispersion was obtained by phase inversion method. The hardness,thickness,viscosity and impact of the dispersion were tested by hardness tester,film thickness tester,viscometer and cylindrical mandrel bending tester. The research results showed that when the ratio of hard and soft monomers was 4∶3,m(benzoyl peroxide)∶m(tert-butyl peroxy-2-ethylhexanoate)=1∶1,m(hydroxyethyl methacrylate)∶m(hydroxypropyl methacrylate)=4∶5,the monomer titration time was controlled at 4.0 h,N,N-dimethylethanolamine was selected as the neutralizer and the neutralization degree was 100%,the synthesized hydroxy acrylic resin dispersion had relatively the best performance. The dispersion could be used to prepare both baked coatings and two-component self-drying coatings. Through testing,it was found that the coating layer had good hardness,dryness,gloss,water resistance performance and excellent chemical resistance,which could be applied to various industrial anticorrosion fields.