自乳化水性环氧树脂的合成

用2,2-二羟甲基丙酸和甲苯二异氰酸酯与双酚A型环氧树脂主链上的仲羟基反应,在环氧树脂主链上引入-COOH基团,制得水性环氧树脂。通过红外光谱分析了产物的结构;讨论了反应溶剂、温度、时间、反应物配比等因素对反应结果的影响。并通过正交试验确定了合成自乳化水性环氧树脂的最优条件。试验结果表明,以丙酮为溶剂,反应温度50℃左右,反应时间4.5h,m(2,2-二羟甲基丙酸)∶m(甲苯二异氰酸酯)∶m(E-44)∶m(二月桂酸二丁基锡)=12∶17∶100∶0.2,制得的水性环氧树脂具有良好的水分散性和优异的固化性能。

Synthesis of Self-Emulsifying Aqueous Epoxy Resin

2,2-dimethylol propionic acid was inducted to react with the secondary hydroxyl group of the bisphenol-A-type epoxy resin through toluene diisocyanate, which results in the induction of the hydrophilic carboxylic group; a self-emulsifying type aqueous epoxy resin was thus developed. The chemical structure of the resultant was analyzed by Fourier transform infrared spectroscopic(FT-IR). The effects of solvent, temperature, time, ratio of reactants on the reaction was discussed; and the optimum reaction condi...