异氰酸酯乳液胶粘剂的制备及应用  

Preparation and application of isocyanate emulsion adhesive

作　　者：宋季轩 马杨豹 陈锓 刘欣玮 顾继友[1] Song Jixuan;Ma Yangbao;Chen Qin;Liu Xinwei;Gu Jiyou(College of Materials Science&Engineering,Northeast Forestry University,Harbin 150040,Heilongjiang,China)

机构地区：[1]东北林业大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《中国胶粘剂》2021年第5期36-41,共6页China Adhesives

基　　金：中央高校基本科研业务费专项资金项目(2572018AB13)。

摘　　要：以脂肪酸与聚乙二醇单甲醚(MPEG)为原料,通过酰氯化反应合成了一系列的可乳化多亚甲基多苯基多异氰酸酯(PAPI)的非离子型乳化剂。通过核磁共振氢谱(1H-NMR)确定合成的乳化剂分子结构,并通过激光粒度仪表征所制备乳液的粒径及其分布。通过丙酮-二正丁胺化学滴定分析法表征乳液中异氰酸酯基活性含量,最后将制备的乳液应用到胶合板,对剪切强度进行测试分析。研究结果表明:该异氰酸酯乳液中w(PAPI)=15%时,胶合板性能达到国家标准要求(Ⅱ类板);并且当w(PAPI)=20%时,胶接强度较好,Ⅱ类板湿强和Ⅰ类板湿强分别为1.22和0.93 MPa。A series of non-ionic emulsifiers of emulsifiable polyaryl polymethylene isocyanate(PAPI)were synthesized by acyl-chlorination reaction,using fatty acid and methoxypolyethylene glycol(MPEG)as raw materials.The molecular structure of the synthesized emulsifier was determined by nuclear magnetic resonance spectroscopy(1H-NMR),and the particle size and distribution of the prepared emulsion were characterized by laser particle size meter.The activity of isocyanate group in emulsion was characterized by acetone-dibutylamine chemical titration method.Finally,the emulsion was applied to plywood,and the shear strength was tested and analyzed.The research results showed that,when w(PAPI)=15%was used in isocyanate emulsion,the performance of plywood was up to the national standard(classⅡ).And when w(PAPI)=20%,the bonding strength was excellent,and the wet shear strength of typeⅡplate and wet shear strength of typeⅠplate were 1.22 and 0.93 MPa,respectively.

关 键 词：异氰酸酯 乳化剂 异氰酸酯乳液 胶合板 

分 类 号：TQ433.4[化学工程]