第46卷第4期 2016年4月
涂料工业
PAINT&COATINGS INDUSTRY
双组分热固型阴极电泳涂料的制备及其电泳工艺的优化
李翠革，李金艳，罗明艳，李再亮，李再峰
（生态化工国家重点实验室培育基地，青岛科技大学，山东青岛266042）
Vol.46No.4 Apr.2016
摘要：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%，一NC0与一0H的物质的量比为1.5：1，80℃烘烤30min后再在140℃下烘烤1h，电泳电压为60V时，能得到表观和性能优异的漆膜。
关键词：电泳涂料：解封温度：三羟甲基丙烷：工艺参数：漆膜
中图分类号：TQ630.4
文献标识码：A
文章编号：0253-4312（2016)04-0029-05
Preparation of Two-Component Thermosetting Cathodic
Electrophoretic Coatings and Optimization of Electrophoresis Process
Li Cuiping,Li Jinyan,LuoMingyan,LiZailiang,LiZaifeng(Key Laboratory of Eco-chemical Engineering of State Cultivation Base
Qingdao university of Science and Technology,Qingdao,Shandong 266042, China)
Abstract:An cationic polyurethane(PU)resin modified with trimethvlolpropane(TMP) was synthesized from oligomer polyol, isophorone diisocyanate(IPDI) as raw materials via self-emulsifying method, and further reacted with blocked hexamethylene diisocyanate (HDI) tri-mer as cross-linking agent to form a film by electrophoresis process, The deblock process of waterborne polyurethane crosslinking agent was detected by in-situ FT-IR, meanwhile, the curing process of electrophoretic coatings was investigated. Effect of the dosage of TMP, molar ratio of resin to cross -linking agent, deblock temperature of waterborne polyurethane crosslinking agent and process parameters on the appearance and properties of the film were in-vestigated respectively. It was found that the desirable property and appearance for the film could be obtained under the conditions that the mass fraction of TMP was about O. 50%: the molar ratio of -NCO and -—OH was 1.5:1; the deblock temperature of waterborne polyure thane crosslinking agent was 100 C; the baking temperature and time were 80C/30 min,
【基全项目】国家自然科学基全资助项目（21176126）：武汉市“黄鹤英才计对"资助项目*通信联系人
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工艺技术