双键封端水性聚氨酯的制备及其涂膜性能  

Preparation of UV curable waterborne polyurethane and its application effect in coatings

作　　者：王磊[1] 赖小娟[1] 马少云 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021 [2]延长油田丰源实业总公司油田化工产品开发中心,陕西西安710069

出　　处：《陕西科技大学学报（自然科学版）》2013年第3期60-63,67,共5页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(51103081);咸阳市科技计划项目(2012k05-03);陕西科技大学博士科研启动基金项目(BJ11-17);陕西科技大学学术骨干培育计划项目(XSG2010012)

摘　　要：采用自乳化聚氨酯的制备方法,制备了双键封端水性聚氨酯分散体.加入3%水性光引发剂,在紫外光照射下,制得交联聚氨酯涂膜.采用红外光谱、透射电镜、热重分析等手段对水分散体及光固化涂膜的结构和性能进行了分析表征.红外光谱测试结果表明,UV固化后C=C双键参与了交联固化反应.随着C=C双键含量增大,乳液粒径增大,固化膜的交联程度增大,膜的耐水性和热稳定性得到提升.当双键含量为8.51%时,光固化膜具有大于90%的凝胶含量,胶膜吸水率最低值达12.5%.Waterborne UV curable polyurethane emulision containing C= C double bond was prepared with selfemulsification. 3%water soluble photoinitiator was added to the polyure thane emulision, and polyurethane films was prepared by ultraviolet irradiation. The struc- ture of the polyurethane emulision and films were confirmed by means of Fourier transform infrared spectroscopy（FTIR）, transmission electron microscopy（TEM） and thermogravime- tric analysis. FTIR test result shows that cross linking and solidification reaction of C = C double bond happened after UV irradiation. When C= C content increases, the particle size of polyurethane emulision increases, crosslinking degree of films increases, water resistance and heat resistance have both been improved. When C=C content is 8.51%,gel content is more than 90% and the lowest water absorption can be 12.5%

关 键 词：UV固化 水性聚氨酯 涂膜 性能 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]