低温固化环氧阴极电泳涂料的制备  

Preparation of epoxy cathodic electrophoretic coatingcurable at low temperature

作　　者：张红凤[1] 高军[1] 高晓涵[1] 林立[2] 

机构地区：[1]山东科技大学化学与环境工程学院,山东青岛266510 [2]山东大学化学与化工学院,山东济南250100

出　　处：《电镀与涂饰》2012年第2期53-56,共4页Electroplating & Finishing

基　　金：山东省科技厅项目(Y2007B20)

摘　　要：采用乙二醇单丁醚和甲乙酮肟对甲苯二异氰酸酯(TDI)进行全封闭,并将其加入到二乙醇胺改性的环氧树脂乳液中进行混合搅拌,制备了一种低温固化环氧阴极电泳涂料。研究了封闭反应温度、TDI用量和接枝反应温度对漆膜性能的影响,确定了适宜的工艺条件:甲乙酮肟封闭反应温度为40°C,接枝反应温度80°C,TDI质量分数为15%左右。在此条件下制备的漆膜可以在150°C/30min的条件下固化,所得漆膜厚度20μm,光泽70°,附着力1级,柔韧性1mm,铅笔硬度3H,冲击强度>50kg.cm,耐水性>800h,达到设计要求。A low-temperature curable epoxy cathodic electrophoretic coating were synthesized, for which toluene diisocyanate （TD1） completely blocked by ethylene glycol monobutyl ether and ethyl methyl ketone oxime was mixed while agitating with a diethanolamine-modified epoxy resin emulsion. The influence of blocking reaction temperature, TDI dosage, and grafting reaction temperature on coating performance was studied. The suitable process conditions were determined as follows： blocking reaction temperature 40 ℃, grafting reaction temperature 80℃, and TDI mass fraction ca.15%. The coating obtained under the above conditions can be cured at 150 ℃ for 30 min, and the cured coating has a thickness of 20 μm, luster 70℃, adhesion strength ! grade, flexibility 〈1 mm, pencil hardness 3H, impact strength 〉50 kg.cm, and water resistance 〉800 h, meeting the desired requirement.

关 键 词：阴极电泳涂料 环氧树脂 低温固化 柔韧性 

分 类 号：TQ632.1[化学工程—精细化工]