Method for Reducing the Content of Free ��NCO in Prepolymer of TDI-TMP
YANG Mei~1,LU Yan-hong~2,ZHANG Long~2 (1.Department of Chemical Engineering,Jilin Institute of Chemical Technology, Jilin Jilin 132022,China; 2.School of Chemical Engineering,Changchun University of Technology,Jilin Changchun 130012,China)
(1.Department of Chemical Engineering,Jilin Institute of Chemical Technology, Jilin Jilin 132022,China; 2.School of Chemical Engineering,Changchun University of Technology,Jilin Changchun 130012,China
Abstract��
In order to reduce the content of ��NCO in prepolymer of TDI-TMP,caprolactam was used to block the ��NCO group of prepolymer as the blocking agent.The parameters influencing the blocking reaction were researched,such as the quantity of blocking agent,reaction temperature,the kind and quantity of catalyst.The content of free ��NCO in the prepolymer can be reduced to less than 0.5% at the condition that SD-101 was used as catalyst at amount of 0.3%,and reacting 3 hours at 80 ��.
YANG Mei~1,LU Yan-hong~2,ZHANG Long~2 .Method for Reducing the Content of Free ��NCO in Prepolymer of TDI-TMP[J]. Chemcial Industry and Engineering, 2004,21(6): 429-431
2004, Vol. 21 
