H 艺技术
第43卷第5期 2013年5月
徐科工业
PAINT & COATINGS INDUSTRY
端羟基聚丁二烯-丙烯晴改性聚氨酯
阴极电泳漆的制备与性能研究
Vol. 43No.5 May2013
曹玉阳，吴元，李再峰（青岛科技大学生态化工教育部重点实验室，山东青岛266042）
摘要：以低聚物多元醇、异佛尔酮二异氰酸酯（IPDI）为主要原料，N-甲基二乙醇胺（MDEA）和 1,4-丁二醇为扩链剂，采用自乳化法制备端羟基聚丁二烯-丙烯睛（HTBN)改性阳离子聚氨酯树脂；以异佛尔酮二异氰酸酯、N-甲基二乙醇胺、1,4-丁二醇为原料制备封端交联剂，二者混合、分散后进行电泳成膜。探究了HTBN的用量、软段种类、树脂与交联剂的比例以及中和度对漆膜性能的影响，结果表明：使用HTBN和PTMG-1000作为混合软段，HTBN在树脂中的质量分数为7.9%，树脂与交联剂的官能团物质的量比为1：1.1,树脂中和度为90%时，能较好地改善漆膜性能。
关键词：端羟基聚丁二烯-丙烯睛：阳离子聚氨酯：电泳漆
中图分类号：TQ630.7
文章编号：0253-4312（2013)05-0040-05
文献标识码：A
PreparationandOptimizationofHTBNModified Cathodic Polyurethane Electrophoretic Paint
CaoYuyang,WuYuan,LiZaifeng
(Qingdao Uninersity of Science and Technology,Qingdao,Shandong 266042,China)
Abstract: An cationic polyurethane resin modified with HTBN was synthesized by self -e mulsifying process,with IPDI and polyols oligomer as raw materials and MDEA and BDO as chain extenders, and a blocked crosslinking agent was synthesized by using IPDI,MDEA and BDO as materials,which were mixed and dispersed for CED processing.Effect of the dosage of HTBN, soft segments,the molar ratio of resin and crosslinking agent, as well as neutraliza-tion degree on the appearance and properties of the PU film were investigated respectively. I was found that the desirable property and appearance for the PU film could be obtained under the condition of HTBN and PTMG -1000 as soft segments, 7.9% of HTBN, 1: 1.1 for the functional groups molar ratio of resin to crosslinking agent and 90% neultralization degree
Key Words:HTBN; cationic polyurethane; electrophoretic paint
水性聚氨酯电泳涂料具有低污染、节能以及高效等特点，已广泛应用于汽车、家电、仪表、建材等行业。目前有很多学者致力于通过接枝、嵌接和交联等改性方法来增加聚氨酯分子间的化学交联键，提高其交联
[基金项目】国家自然科学基金（21176126）
通信联系人 40
密度，以此来增强电泳涂料的耐水、耐化学品等性能1-2)；本研究利用端羟基聚丁二烯-丙烯睛的端羟基特性，通过与含有异氰酸酯基的分子反应，将其接人聚氨酯树脂中：并且以双键交联形成化学键的形式