环氧大豆油丙烯酸酯的合成工艺

Synthetic Process of Epoxidized Soybean Oil Acrylate

目的研究环氧大豆油丙烯酸酯(AESO)的最佳合成工艺条件。方法采用蒽醌为催化剂,对甲氧基苯酚作阻聚剂,并将其与环氧大豆油、丙烯酸混合进行加成反应,通过酸值控制反应终点,再经过丁酮、乙醚溶解,沉淀后得到纯化的AESO,并研究环氧大豆油与丙烯酸的投料比、催化剂用量、阻聚剂用量对反应及产物的影响。结果环氧大豆油与丙烯酸的投料比(用环氧基和羧基的物质的量比n环氧基∶n羧基表示)为1.12∶1,催化剂的质量分数为1.2%,阻聚剂的质量分数为0.10%时,AESO的粘度为47.31mPa·s,酸值为4.73 mg/g(以KOH的质量计),树脂为高明度无色透明的流体,光泽度为2±1,明度为(90±5)%。结论环氧基用量过高会降低产品的粘度;催化剂用量过高会降低产品的粘度和酸值;合成树脂的光泽度和明度较高,符合油墨用树脂的标准。

The work aims to optimize the synthetic process conditions of epoxidized soybean oil acrylate(AESO). AESO was synthesized with epoxidized soybean oil and acrylic acid by adding anthraquinone as catalyst, p-methoxyphenol as inhibitor. The reaction was completed with acid value as indication. The reaction product was dissolved and precipitated by butanone and ether. Then AESO was refined at the end of the purification. The effects of the ratio of epoxidized soybean oil to acrylic acid, the consumption of catalyst and inhibitor on the reaction and product were studied. When ratio of epoxy soybean oil to acrylic acid(mass ratio of epoxy and carboxyl nepoxy∶ncarboxyl) was 1.12∶1, the mass fraction of catalyst was 1.2%(mass fraction) and the mass fraction of the inhibitor was 0.10%(mass fraction), the viscosity of AESO was 47.31 mPa·s, and the acid value was 4.73 mg/g(in the mass of KOH). AESO was transparent liquid with glossiness of 2±1 and brightness of (90±5)%. Excessively high amount of epoxy group will decrease the viscosity of the product. Excessively high amount of catalyst will decrease the viscosity and acid value of the product. Gloss and brightness of synthetic resin are higher, conforming to the standard on resin for printing ink.