环氧树脂与丙烯酸酯复合改性水性聚氨酯的合成研究Synthesis of Waterborne Polyurethane Modified by Epoxy Resin and Acrylic Ester
黄洪,傅和青,邓艳文,陈焕钦
摘要(Abstract)：
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(KeyWords)： 水性聚氨酯;环氧树脂改性;丙烯酸酯改性;核壳交联
基金项目(Foundation): 广州市科技攻关计划项目(B10-B2050580)。
作者(Author): 黄洪,傅和青,邓艳文,陈焕钦
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