以低聚物多元醇、异佛尔酮二异氰酸酯(IPDI)为主要原料,三羟甲基丙烷(TMP)为改性剂,合成了端羟基自乳化阳离子聚氨酯(PU)树脂,再以封端型六亚甲基二异氰酸酯(HDI)三聚体为交联剂,与其一同乳化制备电泳树脂,采用电泳工艺制备成膜.用“原位FT-IR”跟踪了交联剂的解封过程,研究了电泳涂料的固化过程.同时探究了TMP的用量、交联剂与PU树脂的比例、交联剂的解封温度、电泳工艺参数对漆膜性能的影响.结果表明:交联剂的解封温度为100℃;TMP在树脂中的质量分数为0.50％,-NCO与-OH的物质的量比为1.5∶1,80℃烘烤30 min后再在140℃下烘烤1h,电泳电压为60 V时,能得到表观和性能优异的漆膜.
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