HDI缩二脲聚氨酯固化剂合成与残余HDI的分离  

Primary Study on Synthesis of HDI Biuret Polyisocyanate and Separation of Residual HDI

作　　者：胡孝勇[1] 陈薇[1] 郭祀远[2] 

机构地区：[1]广西工学院生物与化学工程系,广西柳州545006 [2]华南理工大学轻工技术与工程学科博士后流动站,广州510640

出　　处：《涂料工业》2008年第10期45-46,49,共3页Paint & Coatings Industry

基　　金：中国博士后科学基金资助项目(20060400760);广西科技厅青年科学基金(桂科青0640012)

摘　　要：采用喷雾法合成了HDI缩二脲,采用短程蒸馏脱除残留在HDI缩二脲中的游离HDI单体,成功地制得了颜色浅、黏度低的HDI缩二脲多异氰酸酯样品,测试样品的黏度56 s、—NCO含量21.4%、HDI残留量0.4%。探讨了反应合成机理,反应温度最好不低于90℃、不高于140℃;n(HDI)∶n(H2O)的值越大,合成的产物越趋于理想产物。HDI biuret was synthesized by means of water spaying process. Short -range distillation equip- ment was used to separate residual HDI. A low viscosity HDI biuret was obtained with viscosity 56 s, -NCO content 21.4% and residual HDI 0. 4%. The reaction mechanism of the system was discussed, which indicated that reaction temperature between 90 ℃and 140 ℃ and higher HDI/H20 ratio could give a satisfied product.

关 键 词：六亚甲基二异氰酸酯(HDI) HDI缩二脲 短程蒸馏 

分 类 号：TQ630.493[化学工程—精细化工]