文献类型：期刊文献

英文题名：Synthesis and properties of a novel UV-curable waterborne hyperbranched polyurethane

作者：Lin, Xufeng[1];Zhang, Shouyi[1];Qian, Jun[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

年份：2014

卷号：11

期号：3

起止页码：319

外文期刊名：JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH

收录：;EI(收录号：20142117738810);WOS:【SCI-EXPANDED(收录号:WOS:000335508400004)】；

语种：英文

外文关键词：UV-curable; Waterborne; Hyperbranched; Polyurethane

摘要：A series of ultraviolet (UV)-curable waterborne hyperbranched polyurethane dispersions (WHPUDs) have been successfully synthesized by modifying the hyperbranched polyester H10, which was prepared using pentaerythritol as a core molecule and dimethylolpropionic acid as monomers, with succinic anhydride, toluene diisocyanate (TDI), and hydroxypropyl acrylate (HPA). The H10 was characterized by H-1 nuclear magnetic resonance spectroscopy and matrix-assisted laser desorption/ionization time of flight mass spectrometry. The properties of the WHPUDs with different content of succinic anhydride and TDI-HPA have been investigated by measuring the stability, the particle size, and the rheological behavior. The effects of the content of succinic anhydride and TDI-HPA were studied in terms of UV-curing rate, water resistance, and thermogravimetric behaviors of WHPUD coatings. The WHPUDs showed good appearance, particle size, viscosity, and storage stability. The WHPUD films showed superior photosensitivity and the percent conversion of C=C bonds reached about 80% when the radiation time was 50 s. Moreover, the UV-cured films had good water resistance and thermostability, which can benefit a waterborne polyurethane resin for waterborne coatings.