健康·安全·环境
第46卷第5期 2016年5月
涂料工业
PAINT & COATINGS INDUSTRY
Vol.46No.5 May2016
阳离子水性封闭型聚异氰酸酯交联剂的制备与性能
孙祥，书军*2（1.常州大学材料科学与工程学院，
江苏常州213164;2.盐城工学院材料工程学院，江苏盐城224051）
摘要：以异佛尔酮二异氰酸酯（IPDI）和三乙醇胺（TEOA）制备支化型异氰酸酯基（一NCO）封端的预聚体，分别以N-甲基二乙醇胺（MDEA）和聚乙二醇（PEG）为亲水扩链剂，最后用二甲基吡唑（DMP）封闭剩余的一NCO基团得到阳离子水性封闭型聚异氰酸酯交联剂，并用傅里叶变换红外光谱（FT-IR）表征了交联剂的结构。主要研究了预聚反应时异氰酸酯指数（R，值）以及亲水扩链剂的种类对交联剂性能的影响。研究表明：亲水扩链剂的种类对交联剂的解封温度有显著的影响，当以 MDEA为亲水扩链剂、R，值为1.9时，交联剂的性能达到最佳。
关键词：阳离子；水性；封闭聚异氰酸酯：交联剂
中图分类号：TQ630.4*3
文献标识码：A
文章编号：0253-4312（2016）05-0060-05
Preparation and Property of Cationic Waterborne
BlockedPolyisocyanate Crosslinker
SunXiang，Wei Jun
(1. School of Materials Science and Engineering Changzhou Uninersity, Changzhou, Jiangsu 213164, China: 2.School of Materials Engineering Yancheng Institute of Technology,Yancheng,Jiangsu 224051, China)
Abstract:A NCO-terminated branched prepolymer was synthesized by the reaction of iso-phorone diisocyanate (IPDI) and triethanolamine （TEOA), then reacted with N-methyldi-ethanolamine (MDEA) or polyether glycol (PEG) as hydrophilic chain extender, finally reacted with dimethylpyrazole (DMP) to block the residual NCO groups to form a cationic waterborne blocked polyisocyanate crosslinker. Its structure was characterized by Fourier transform infrared spectrum (FT-IR). The effects of isocyanate index (R,) of the prepolymer-ization reaction and the type of hydrophilic chain extender on the properties of the obtained crossliker were discussed. It was found that the type of hydrophilic chain extender has a signifi-cant influence on deblocking temperature of crosslinker. Thus, the crosslinker showed the optimal performance when the R, was 1. 9 and MDEA was used as hydrophilic chain extender
Key Words:cationic; waterborme;blocked polyisocyanate; crosslinker
随着人们环保意识的加强，水性涂料越来越受到
关注，水性封闭型聚异氰酸酯交联剂作为水性涂料固
【基金项目】江苏省产学研前略性联合研究项目（BY2015057-27）；江苏省高校自然科学研究重大项目（11KJA430010）：江苏省青蓝工程（学科带头人)
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