环氧树脂改性醇溶性双组分复膜胶的研制

首先以EP(环氧树脂)和MAA(甲基丙烯酸)为原料,合成了EM(甲基丙烯酸环氧单酯);然后以EM、HPA(丙烯酸羟丙酯)、VAc(醋酸乙烯酯)和EA(丙烯酸乙酯)为共聚单体,制得四元共聚物(EM环氧改性聚丙烯酸酯);最后将其和自制氨基聚氨酯固化剂作为双组分,两者共混后制得醇溶性复膜胶。研究结果表明:采用单因素试验法优选出制备EM环氧改性聚丙烯酸酯的最佳工艺条件是反应温度为75℃、反应时间为6 h、w(引发剂)=1.6%(相对于混合单体总质量而言)和m(EA)∶m(VAc)∶m(EM)∶m(HPA)=41∶28∶17∶14;当m(氨基)∶m(环氧基)=20∶21、固化时间为24 h和固化温度为50℃时,复膜胶的剥离强度相对最大。

Study on preparing alcohol-soluble two-components laminating adhesive modified by EP

First,with EP(epoxy resin) and MMA(methacrylic acid) as raw materials,an EM(epoxy ester methacrylate) was synthesized.Then,with EM,HPA(hydroxylpropyl acrylate),VAc(vinyl acetate) and EA(ethyl acrylate) as comonomers,a quadripolymer(polyacrylate modified by EM with epoxy groups) was prepared.Finally,with quadripolymer and homemade amido-PU(polyurethane) curing agent as two-components,an alcohol-soluble laminating adhesive was prepared by blending method of two-components.The research results showed that the optimal process conditions of preparing polyacrylate modified by EM with epoxy groups were preferred by singlefactor experiment method when reaction temperature and time were 75 ℃ and 6 h respectively,mass fraction of initiator was 1.6% in total blending monomers,and mass ratio of m(EA)∶m(VAc)∶m(EM)∶m(HPA) was 41∶28∶17∶14.The laminating adhesive had the relatively maximal peeling strength when mass ratio of m(amido)∶m(epoxy group) was 20∶21,curing time and curing temperature were 24 h and 50 ℃ respectively.