高光泽阴极电泳涂料的制备及其性能研究  

Preparation of High Gloss Cathodic Electrophoretic Coatings and Study on the Glossy Properties

作　　者：李晨初 孙家娣 陈兴兰 陈卫东 施志红 LI Chenchu;SUN Jiadi;CHEN Xinglan;CHEN Weidong;SHI Zhihong(CNOOC Changzhou Paint and Coatings Industry Research Institute Co.,Ltd.,Changzhou,Jiangsu 213016,China)

机构地区：[1]中海油常州涂料化工研究院有限公司,江苏常州213016

出　　处：《涂料工业》2024年第8期27-32,共6页Paint & Coatings Industry

摘　　要：为提高阴极电泳涂层光泽,将环氧树脂与胺反应并中和,合成水溶性阳离子聚合物分散体,再与季铵盐分散树脂混合研磨制得高光泽阴极电泳涂料专用色浆,并研究主体树脂环氧当量、环氧树脂种类、封闭型异氰酸酯固化剂的封闭剂和异氰酸酯种类、涂料颜基比和色浆细度对阴极电泳涂层光泽的影响。结果表明:当主体树脂环氧当量为400~500 g/mol,使用二聚酸改性环氧树脂制备阳离子聚合物分散体,采用甲苯二异氰酸酯和乙二醇丁醚合成封闭型异氰酸酯固化剂,涂料颜基比控制在0.2左右,色浆细度≤15μm,可制得高光泽阴极电泳涂料,涂层具有良好的机械性能、耐盐雾性和一定的耐老化性能。In order to improve the gloss of cathodic electrophoretic coatings,epoxy resin was reacted with amines and neutralized to synthesize water-soluble cationic polymer dispersions,which were mixed with quaternary ammonium salt dispersed resins to obtain a high gloss cathodic electrophoretic coating pigment paste.Meanwhile,the effects of epoxy equivalent of the main resin,epoxy resin type,blocking agent and isocyanate type of blocked isocyanates,P/B,and paste fineness on the gloss of cathodic electrophoretic coatings were studied.The results showed that when the epoxy equivalent of the main resin was controlled to 400-500 g/mol,the cationic polymer dispersion was prepared using dimeric acid modified epoxy resin,the blocked isocyanate curing agent was synthesized using toluene diisocyanate and ethylene glycol butyl ether,the P/B of the coating was controlled at around 0.2,and the color paste fineness was≤15μm,the high gloss cathodic electrophoretic coating could be prepared.The film of the cathodic electrophoretic coating showed excellent mechanical,salt spray resistance,and certain artificial accelerated weathering properties.

关 键 词：阴极电泳涂料 二聚酸改性环氧树脂 封闭型异氰酸酯固化剂 封闭剂 光泽 

分 类 号：TQ633.52[化学工程—精细化工]