铝型材阳极电泳消光涂料的合成与性能

Preparation and Properties of Anode Electrophoresis Extinction Coatings for Aluminum Alloy

以丙烯酸酯和聚氨酯为原料,过硫酸钾为引发剂进行乳液聚合得到一种阴离子消光电泳涂料,研究了合成工艺、引发剂用量、反应温度对合成的影响。结果显示,采用半连续滴加法,引发剂过硫酸钾的用量为单体总量的0.6%,反应温度353K得到的乳液性能最优。通过红外光谱确认产物呈现共聚结构,透射电子显微镜结果显示,采用半连续滴加法制备的复合物呈现清晰的核壳结构,加入N,N-二甲基乙醇胺中和丙烯酸树脂上的羧基后,复合乳胶粒出现一定的微相分离。利用所得到的涂料进行电泳后涂膜光泽10(60°)以下,耐热性、耐冲击、附着力等性能达到行业标准,可应用于消光电泳涂料领域。

An acrylic-polyurethane resin was prepared by an emulsion polymerization using potassium persulfate as initiator. The results show that emulsion has best properties under the condition of semi-continuous addition, 0.6 % initiator potassium persulfate of the total monomer, reaction temperature of 353K. Fourier transform infrared spectroscopy （FT-IR） indicates that the polymer presents a copolymer structure. The transmission electron microscopy （TEM） images show that the composite latex particles obtained by semi-continuous dropping polymerization have a clear core-shell structure. After neutralized by N, N-dimethyl ethanolamine, composite latex particles are found to show micro-phase separation. The gloss of the coating on aluminum alloy by electrophoresis is below 10 （60°）. The heat resistance, impact resistance and adhesion performance of the acrylic-polyurethane resin reach industry standards, which can be applied to thematting field of electrophoresis.