二甘醇双丙烯酸酯(Diethylene glycol diacrylate,简称DEGDA),是重要的丙烯酸多官能酯类单体之一,作为紫外光固化树脂的活性稀释剂,广泛用于光固化涂料、印刷油墨、感光树脂版、印刷线路版等领域。目前,合成DEGDA多用浓硫酸为催化剂,其反应底物一般可形成均相分散体系,有利于反应物间充分接触,反应速度快。缺点是浓硫酸的脱水性和强氧化性,导致反应中副反应多,设备腐蚀严重,大量“三废”的排放给环境保护造成极大的压力。
A Br nstd acidic ionic liquid [ Hnmp ] HSO4 was used as catalyst in the esterificafion of acrylic acid and diethylene glycol. The influencing factors were studied. Under the optimized condition:n(diethylene glycol) :n( acrylic acid)was 1.0:2.4(0. lmol diethylene glycol,0.24mol acrylic acid) ,reaction time was 60 min,temperature was 115 - 120℃ ,the dosage of catalyst was 2.5% of the total reactants (mol) ,water-carrying agent was 30mL of toluene,the yield of the diethylene glycol diacrylate was 98. 0% in the csterification of acrylic acid and diethyleneglycol glycol.