摘要： 以二乙醇胺、甲基丙烯酸十三氟辛酯为原料,通过迈克尔加成反应合成一种含氟二元醇(F-DEA),并以此为含氟单体,通过缩合共聚的方法与异佛尔酮二异氰酸酯(IPDI)、聚四亚甲基醚二醇(PTMG-1000)、N-甲基二乙醇胺(MDEA)以及季戊四醇三丙烯酸酯(PETA)反应合成一种阳离子型水性UV固化含氟聚氨酯树脂。利用FT-IR、¹ H-NMR等手段对产物的分子结构进行表征。采用粒径分析、接触角、X射线光电子能谱(XPS)以及各种性能测试手段,对乳液、光固化过程及涂膜性能进行分析研究。结果表明:在一定条件下,该树脂能稳定分散在水中,随着含氟量的增加,乳液粒径增大,但光固化效率有所降低,同时热处理后的氟碳链迁移至涂膜表面,所得的光固化涂膜各种性能较好,特别是耐水和耐酸碱性有明显改善。

关键词: 水性聚氨酯, UV固化, 含氟聚合物, 表面

Abstract: A kind of fluorinated diol (F-DEA) was synthesized from diethanol amine and 1H. 1H, 2H, 2H -perfluorooctyl methacrylate via Michael addition, which was used as fluorinated monomer to further react with isophorone diisocyanate (IPDD), polytetramethylene ether glycol (PTMG-1000), N-methyldiethar (MDEA) and pentaerythritol triacrylate (PETA) via condensation polymerizatio to prepare a novel waterbome Uv-curable fluorinated polyurethane resin (WFPU). The structure of which was characterized by FT-IR and ¹ H-NMR. Several analyzing methods including particle size analysis, contact angle measurement and X-ray photoelectron spectroscopy (XPS) were applied to investigate the emulsion, UV-curing process and film properties. The result showed that the resin could be stably dispersed in water. Moreover, the increase of fluorine content in resin could result in the increase of emulsion particle size and the decrease of Uv-curing efficiency. Fluorocarbon chains migrated to the surface of film after heat treatment and thus the said film gave good performance, especially gave significantly improved resistance to water, acid and alkali.

Key words: waterborne polyurethane, UV-curing, fluorinated polymer, surface