Synthesis of Trimethylolpropane Triacrylat

Trimethylopropane triacrylate(TMPTA) was synthesized by the esterification reaction of trimethylolpmpane(TMP) and acrylic acid(AA) catalyzed by catalyst A at 4.0:1 mole ratio of acrylic acid to trimethylolpropane using hydroquinone and p-hydroxyanisole as polymerization inhibitors,cyclohexane and toluene as water carrying agent.The influence of conditions on TMPTA yield such as temperature,reaction time and the amount of catalyst in the reaction yield were investigated.The optimum conditions were reaction temperature 90 to 104 ℃,catalyst A concentration 3%,polymerization inhibitor concentrations of hydroquinone 0.9% and p-hydroxyanisole 0.2%,and reaction time 8 h.The volume ratio of toluene with cyclohexane in mixed water carrying agent was 55%~45%.Under these conditions,the yield of TMPTA was 83.1%.The esterification conversion was 93.7%,and TMPTA content in product was 87.8%.