封闭型多异氰酸酯固化剂合成工艺研究  

The Study on Synthetic Process of the Blockde Polyisocyanates Curing Agent

作　　者：杨占强[1] 

机构地区：[1]青岛科技大学化工学院,山东青岛266042

出　　处：《合成材料老化与应用》2012年第3期16-19,共4页Synthetic Materials Aging and Application

摘　　要：以甲乙酮肟为封闭剂封闭TDI得到多异氰酸酯固化剂,并通过控制活性氢与-NCO基团的比例、反应时间、反应温度来确定实验最佳条件;通过红外测试来确定固化剂中基团种类从而判断反应后产物种类;通过热失重测试确定固化剂的解封温度。探讨了在不同条件下-NCO的封闭率,进而确定最佳实验条件为n(活泼H):n(—NCO)为1.2,封闭反应温度控制在80℃左右为宜,反应时间为3h。The polyisocyanate curing agent was obtained from the process of methyl ethyl ketoxime block TDI, and the optimum experimental condition was determined by controlling the proportion of active hydrogen and - NCO group, reaction time as well as reaction temperature. The category of curing agent in group and reaction product were tested by infrared testing method; and TG analysis was used to identify the agent deblocking temperature. And the optimum experimental conditions weredetermined afterwards,as n （active H） ： n （-NCO） of 1.2, temperature control of 80℃ and the reaction time of 3 h.

关 键 词：甲乙酮肟 多异氰酸酯固化剂 反应程度 热失重 解封温度 

分 类 号：TQ332[化学工程—橡胶工业]