Synthesis of Di(trimethylolpropane) Tetraacrylate Catalyzed by the Strong Acid Cation Exchange Resin

Di(trimethylolpropane) tetraacrylate(Di-TMPTA) was synthesized with the strong acid cation exchange resins as catalyst and di-trimethylolpropane(Di-TMP) and acrylic acid(AA) as raw materials.The influent factors of esterification reaction and the reuse ability of the catalyst were investigated.The results showed that NKC-9 cation-exchange resin exhibited the highest catalytic activity.When 0.1 mol and 4.5 equivalent AA were refluxed water segregated at 100 ℃ for 6.0 h,the highest efficiency of esterification could reach 92.2% in the presence of 7 wt% NKC-9,400 r/min stirrer speed,0.5% inhibitor and 30% water-carrying agent.Besides,the NKC-9 cation-exchange resin showed good stability,and the esterification yield could reach more than 88% after being used for 5 cycles without any treatment.