甲基丙烯酸二甲胺乙酯对光固化阴极电泳漆性能的影响

Effect of Dimethylaminoethyl Methacrylate on Properties of UV Curable and Cathodic Electrophoretic Paint

摘要: 通过自由基共聚合得到丙烯酸树脂，然后用甲基丙烯酸异氰酸乙酯(MOI)对其改性，合成了既带有N，N-二甲胺基，又带有乙烯基的紫外光固化阴极电泳漆基体树脂。研究了甲基丙烯酸二甲胺乙酯(DMAE-MA)用量对改性丙烯酸树脂水分散体和漆膜性能的影响规律。结果表明，树脂分子链上引入DMAEMA后，其水分散性有较大改善，随DMAEMA用量增加，水分散体的粒径减小、粘度略有增加、稳定性增强，电泳沉积量和漆膜厚度增加，电泳沉积漆膜的初期含水率增加。综合考虑水分散体和漆膜的性能，丙烯酸树脂中DMAEMA质量分数以0．144左右为宜。

Abstract: Acrylic resin containing N,N-dimethyl amino group and vinyl group applicable for UV-curable and cathodic electrophoretic paint was synthesized via radical polymerization of acrylic monomers followed by modification with methacrylic oxyethyl isocyanate (MO