丙烯酸酯改性水性聚氨酯乳液的合成及性能  

The synthesis and properties of acrylate-modified water-borne polyurethane emulsion

作　　者：李庆[1] 樊增禄[1] 蔡信彬[1] 张龙[1] 赵晓剑[1] 

机构地区：[1]西安工程大学环境与化学工程学院,陕西西安710048

出　　处：《西安工程大学学报》2015年第2期140-145,共6页Journal of Xi’an Polytechnic University

基　　金：陕西省国际科技合作项目(2014KW10-04);陕西省大学生创新训练项目(1244)

摘　　要：为提升活性染料染色后苎麻织物的色牢度,采用二羟甲基丙酸(DMPA)和1,4-丁二醇(BDO)为扩链剂将聚氨酯预聚体扩链,所得产物两端的异氰酸酯基团(—NCO)经甲基丙烯酸羟乙酯(HEMA)封闭,制备HEMA改性的水性聚氨酯乳液,之后选用甲基丙烯酸甲酯(MMA)与制得的聚氨酯乳液进行共聚,得到一种丙烯酸酯改性的水性聚氨酯固色剂.实验发现,当MAA用量24g,改性聚氨酯乳液的用量6.25mmol,反应温度80℃,反应时间80min时,所得共聚乳液对苎麻织物的固色效果最佳,尤其是湿摩擦牢度明显提升.In order to improve the color fastness of ramie fabrics dyed by reactive dyes, polyurethane prepolymer was enlarged by dimethylol propionic acid （DMPA） and 1, 4-butanediol （BDO）, isocyanate group（--NCO） of obtained product was reacted by hydroxyethyl methacry- late（HEMA） to give a water-borne polyurethane emulsion modified by HEMA. Then methyl methacrylate （MMA） is employed to copolymerize with obtained water-borne polyurethane e- mulsion to get an acrylate-modified aqueous polyurethane color fixing agent. The properties of color fixing for ramie fabric is optimum when the amount of MAA is 24g, modified polyurethane emulsion is 6.25mmol, copolymerization temperature is 80℃ ,and copolymerization time is 80min. The wet rubbing fastness is improves significantly.

关 键 词：水性聚氨酯 丙烯酸酯 固色剂 染色牢度 苎麻织物 

分 类 号：TS193.2[轻工技术与工程—纺织化学与染整工程]