水性聚氨酯无氟防水涂饰剂的制备与性能  

Synthesis and characterization of fluorine-free waterborne polyurethane for waterproof coating

作　　者：李祥[1,2] 潘名玉 刘遥[1,2] 殷映婷 权衡[1] LI Xiang PAN Ming-yu LIU Yao YIN Ying-ting QUAN Heng(School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China Wuhan Textile University Graduate Student （ Li Yuaa） Workstation, Songzi 315600, China)

机构地区：[1]武汉纺织大学化学与化工学院,湖北武汉430073 [2]武汉纺织大学研究生(丽源)工作站,湖北松滋315600

出　　处：《印染》2017年第1期15-18,共4页China Dyeing and Finishing

基　　金：武汉纺织大学研究生创新团队项目

摘　　要：在水性聚氨酯大分子主链上引入疏水性聚顺丁二烯和端羟烃硅油,侧链上引入含疏水性长链烷基的扩链剂EXT14,制备出无氟拒水型水性聚氨酯涂饰剂。通过对水性聚氨酯乳液进行粒径、表面张力和稳定性测试,对胶膜进行接触角和物理性能测定,并与常规水性聚氨酯及氟改性水性聚氨酯进行对比,探究含有疏水性侧长链烷基的扩链剂EXT14的拒水性能。结果表明,扩链剂EXT14质量分数越高,乳液粒径越大,表面张力越低,但拒水效果并非越好。当扩链剂EXT14质量分数低于10%时,随着EXT14质量分数增加,胶膜接触角增大,拒水效果提高;当质量分数超过10%,表面张力接近氟改性水性聚氨酯的表面张力会使胶膜接触角下降,且乳液稳定性变差,胶膜手感变硬。Fluorine-free water-proof waterborne polyurethane coating agent is synthesized by introducing poly cis butadiene and end hydroxyl hydrocarbon silicone oil onto the main chains, and introducing the chain extender EXT14 with hydrophobic long chain alkyl onto the side chains. The water repellency of coating agent with chain extender EXT14 is studied by testing particle size, surface tension and stability of waterborne polyurethane emulsions, the contact angle and physical properties of the films are characterized, and the results are compared with those with the conventional waterborne polyurethane and fluorine modified waterborne polyurethane. It is found that the higher the EXTI4 mass fraction, the larger the particle size, and the bower the surface tension, but the water repellent effect may not be better. When the mass fraction of chain extender EXT14 is lower than 10%, with the increase in EXT14 concen- tration, the contact angle of the film is bigger, the water repellent effect is better. When the mass fraction of EXT14 is more than 10%, the surface tension is close to that of fluorine modified waterborne polyurethane, but the contact angle of the film decreases, and the emulsion shows poor stability and hard feeling.

关 键 词：印染助剂 制备 无氟 拒水 水性聚氨酯 

分 类 号：TS195.25[轻工技术与工程—纺织化学与染整工程]