文档介绍：:1003-9015(200604-0583-05环氧树脂与丙烯酸酯复合改性水性聚氨酯的合成研究黄洪1,傅和青1,邓艳文2,陈焕钦1(,广东广州510640;,广东广州510640摘要:用环氧树脂E-44和甲基丙烯酸甲酯(MMA复合改性水性聚氨酯(WPU,丙烯酸羟乙酯(HEA与MMA发生共聚反应。制得以丙烯酸酯为核,聚氨酯为壳,HEA为核壳之间桥连的核壳交联型PUA复合乳液。这种复合乳液集中了聚氨酯的耐低温、柔软性好、附着力强,丙烯酸酯的耐水和耐候性好,环氧树脂的高模量、高强度、耐化学性好等许多优点。实验研究结果表明:随着环氧树脂E-44和MMA添加量增大,胶膜硬度、拉伸强度和耐水性逐渐提高,胶膜断裂伸长率和乳液的稳定性则随着降低。当环氧E-44含量为4%,MMA含量为20%~30%时综合性能较好。关键词:水性聚氨酯;环氧树脂改性;丙烯酸酯改性;核壳交联中图分类号:;;:ASynthesisofWaterbornePolyurethaneModifiedbyEpoxyResinandAcrylicEsterHUANGHong1,FUHe-qing1,DENGYan-wen2,CHENHuan-qin1(,SouthChinaUniversityofTechnology,Guangzhou510640,China;,SouthChinaUniversityofTechnology,Guangzhou510640,ChinaAbstract:ThewaterbornepolyurethanewasmodifiedbyepoxyresinE-44andmethylmethacrylate(MMAviacopolymerizationofhydroxylethylacrylate(HEAandMMAtoproducethecore-positeemulsionpolyurethane-acrylate(PUA,inwhichthecorepartisformedbyacrylicester,,,strongadhesionandlow-temperatureresistancejustlikethepolyurethane,waterresistanceandgoodweatheringqualitylikeacrylate,,tensilestrengthandwaterresistanceofPUAfilmincreasewithincreasingtheamountofepoxyresinE-44andMMA,-44andMMAaddedare4%and20%~30%,:waterbornepolyurethane;epoxyresinmodified;acrylicestermodified;core-shellcrosslink1前言聚氨酯以其分子结构的软硬度可调节范围广、耐低温、柔韧性好、附着力强等优点,广泛用于涂料、胶粘剂、弹性体、发泡材料等。但是随着环保法规的日益严格和人们环保意识的逐渐增强,这种溶剂型聚氨酯的使用愈来愈受到限制,以水为分散介质的环保性水性聚氨酯(WPU成为近年来聚氨酯树脂开发收稿日期:2005-12-02;修订日期:2006-05-15。基金项目:广州市科技攻关计划项目(B10-B2050580。作者简介