【摘要】 采用甲基丙烯酸(MAA)为功能单体,引入极性基团羧基,然后用三乙胺中和成盐,加水相反转,得到水性环氧树脂乳液。分别讨论了反应温度、溶剂、中和剂等条件对反应的影响;研究了引发剂过氧化苯甲酰(BPO)用量对乳液黏度、粒径和稳定性的影响。以DO4为水溶性固化剂,探讨了固化剂用量和烘干温度对胶膜性能的影响。结果表明,反应温度为110℃,采用正丁醇和丙二醇甲醚溶解环氧树脂,并使用三乙胺为中和剂时,得到的乳液性能较好。随引发剂用量的增大,黏度降低。乳液具有良好的稀释、冻融和贮存稳定性。当固化剂用量为15%,烘干温度为80℃时,制得的胶膜综合性能较好。更多还原

【Abstract】 The waterborne epoxy latexes were prepared by introducing the polar carboxylic groups from methyl methacrylate (MMA) as the functional monomer,then neutralizing with triethylamine and phase-inversing with addition of water.The influence of reaction temperature,solvent,neutralizer and other conditions on the reaction was discussed;the effect of initiator dibenzoyl peroxide (BPO) amount on the viscosity,particle size and stability of latexes was studied.Then,the cured film was obtained by using waterborne curing agent DO4 and the influence of curing agent amount and curing temperature on the properties of films was investigated.Results show that when using the mixed solvent of propylene glycol methyl ether and n-butanol to dissolve epoxy resin and triethylamine as the neutralizer the latexes prepared at reaction temperature of 110℃ have good properties.When increasing the BPO amount,the viscosity of latexes decreased.The tests show that all the latexes have good dilution and freeze-thaw properties and storage stability.When the curing agent amount is 15% and the drying temperature is 80℃,the combination properties of films are good.更多还原