| 8. | Using diethanolamine as aminating agent and glacial acetic acid as neutralizing agent , aminated epoxy acrylic cationic resin was prepared . the effect of technology of aminated epoxy acrylic resin on properties of eletrodeposition was studied by conductivity meter and electrophoresis apparatus . it was shown that , conductivity firstly decreased , and then increased with aminating temperature increase . in contrast with putting polyacrylic resin into thin acetic acid solution , the more compact film could be achieved by neutralizing polyacylic resin with glacial acetic acid and then add it into water . when neutralizing temperature was enhanced , the speed of electrodepsidon was found to increase , and the film was also more compact . increasing the dn leads to enhanced conductivity and smaller particle size . when dn equaled to 80 , the smoothest film could be achieved
以二乙醇胺为胺化剂、冰醋酸为中和剂,合成了胺化环氧丙烯酸阳离子树脂.采用电泳仪和电导率仪,研究了胺化环氧丙烯酸树脂合成工艺对阴极电泳涂料电沉积性的影响.结果表明,随着胺化温度的增加,电泳液电导率先下降后上升.将冰醋酸加入树脂中中和,后用水稀释,比树脂在醋酸稀溶液中中和,电沉积性能更好.电沉积速率随着中和温度的上升而增加,电沉积膜致密性相应增加.中和度( dn )愈高,电泳液电导率愈大,粒径越小,而涂膜外观在中和度为80时达到最佳 |
