水性封闭异氰酸酯的合成  

Synthesis of Waterborne Blocked Isocyanate

作　　者：谢丽 赵伍堂 吴迎春[1] Xie Li;Zhao Wutang;Wu Yingchun(School of Chemistry and Environmental Science,Shaanxi University of Technology,Shaanxi,723000;Shenzhen Sunrise Energy Co.,Ltd.,Guangdong,518100)

机构地区：[1]陕西理工大学化学与环境科学学院,陕西723000 [2]深圳市兆新能源股份有限公司,广东518100

出　　处：《当代化工研究》2024年第10期164-166,共3页Modern Chemical Research

摘　　要：采用混合二元酸(DBE)作为稀释剂,二环己基甲烷二异氰酸酯(HMDI)与甲基丁酸(DMBA)发生缩聚反应,以甲乙酮肟对聚合物的活性-NCO基团进行封端,再用三乙胺中和羧酸形成铵盐增加聚合物的水溶性,制得一种封闭型水性异氰酸酯固化剂。反应的物料比为二环己基甲烷二异氰酸酯(HMDI):二甲基丁酸(DMBA)=20,反应温度为80℃时,反应平稳且预聚体反应充分,其-NCO值可达到理想的19.5%左右。Using mixed dibasic acid(DBE)as a diluent,dicyclohexylmethane diisocyanate(HMDI)and methyl butyric acid(DMBA)under-go polycondensation reaction,and the active-NCO group of the polymer is blocked with methyl ethyl ketoxime.Then,triethylamine is used to neu-tralize the carboxylic acid to form an ammonium salt to increase the water solubility of the polymer,and a blocked aqueous isocyanate curing agent is prepared.The reaction material ratio is dicyclohexylmethane diisocyanate(HMDI):dimethylbutyric acid(DMBA)=20,when the reaction tem-perature is 80℃,the reaction is stable and the prepolymer reaction is sufficient,and its-NCO value can reach the ideal About 19.5%.

关 键 词：水性固化剂 封闭异氰酸酯 合成因素 

分 类 号：TQ630[化学工程—精细化工]