丁二酰亚胺,水杨酸乙酯,对羟基苯甲酸乙酯与六亚甲基二异氰酸酯的封闭反应研究

Study on the Blocking Reactions of Hexamethylene Diisocyanate(HDI) with Succinimide, Ethyl 4 - Hydroxybenzoate and Ethyl 1 - Hydroxybenzoate

以二丁基锡二月桂酸为催化剂,研究了丁二酰亚胺、水杨酸乙酯、对羟基苯甲酸乙酯与六亚甲基二异氰酸酯之间的封闭反应。结果表明,六亚甲基二异氰酸酯的封闭反应是二级反应,不同的封闭物,反应速率常数不同;升高反应温度,加大催化剂用量均有利于封闭反应的进行。

With dibutyl tin dilaurate as catalyst* blocking reactions of hexamethyllene diiso-cyanate(HDI)with succinimide, ethyl 4-hydroxybenzoate and ethyl 1-hydroxybenzoate were studied in this paper. The results showed that the blocking reaction was a second order reaction and various blocking agents had different reaction rate constant. It was also proved that the amount of catalyst and temperature could influence the reaction rate.