以环氧树脂(E-51)、衣康酸(IA)、甲基丙烯酸六氟丁酯(HFMA)为主要原料,合成了一系列有机氟改性UV固化水性环氧衣康酸树脂.研究了反应温度对合成树脂的影响,考察了HFMA用量对涂膜耐水性、水接触角和力学性能的影响,并利用红外光谱和热重分析对改性树脂进行了表征.结果表明:当反应温度为105℃,含氟单体与环氧树脂质量比为1∶4时,制得的树脂及其涂膜的综合性能优良,涂膜的吸水率由改性前的9.14％下降到改性后的4.01％,水接触角由改性前的63.26°增加到改性后的90.05°,耐水性、疏水性和热稳定性明显提高.
A series of organic fluorine-modified UV-curable waterborne epoxy itaconic resin were synthesized from epoxy resin (E-51),itaconic acid (IA) and hexafluorobutyl methacrylate (HFMA) as main materials.The effect of reaction temperature on the synthesis of resin was studied.The influence of HFMA amount on water resistance,water contact angle and mechanical properties of the cured film were studied.The modified resin was characterized by Fourier transform infrared spectrometry and thermogravimetric analysis.The results showed that the comprehensive properties of the prepared resin and its coating film were excellent when the reaction temperature was 105 ℃ and the ratio of organic fluorine to epoxy resin was 1∶4.After modification,the water absorption rate of the cured film decreased from 9.14％ to 4.01％,meanwhile,the water contact angle increased from 63.26° to 90.05°.These revealed an obvious improvement in water resistance,hydrophobicity and thermal stability.
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