热处理提高环氧树脂适印性的机理研究

Mechanism of Heat Treatment to Improve Printability of Epoxy Resin

采用热聚合方式,合成环氧大豆油基树脂,优化反应温度、反应时间、催化剂用量、增稠剂用量等条件.实验结果表明,适当的提高反应温度,增加反应时间、催化剂用量以及增稠剂用量,有利于提高产物黏度,增强热处理效果.当反应中环氧大豆油丙烯酸酯的质量为50 g,增稠剂聚丙烯酰胺的质量为0.45 g,催化剂三苯基膦为1g,反应时间为4.5h时,得到的树脂酸值为3.90 mgKOH/g,黏度为495 mPa·s,光泽度为2.10%,明度为88.78%,色泽偏蓝绿方向,标准色差为0.88,符合油墨用树脂的标准.

The epoxy soybean oil-based resin was synthesized by thermal polymerization,and the reaction temperature,reaction time,catalyst amount and amount of thickener were optimized.The experimental results indicated that appropriately increasing the reaction temperature,the reaction time,catalyst and thickener was beneficial to increase the viscosity of the products and enhance the heat treatment effects.When the mass of the acrylatedep oxidized soybean oil was 50g in the reaction,the mass of the thickener as polyacrylamide was 0.45 g,the catalyst triphenylphosphine was 1 g,and the reaction time was 4.5 hours.The obtained resin had an acid value of 3.90 mgKOH/g,aviscosity of 495 mPa·s,gloss of 2.10%,brightness of 88.78%,a bluish-green color,and a standard color difference of 0.88,which complied with the standard of the resin abuse in ink.