水性聚氨酯的制备及其性能的研究  

STUDIES ON THE SYNTHESIS AND PROPERTIES OF WATERBORNE POLYURETHANE

作　　者：郝广杰[1] 张邦华[1] 宋谋道[1] 周庆业[1] 

机构地区：[1]南开大学高分子化学研究所

出　　处：《离子交换与吸附》1999年第2期97-102,共6页Ion Exchange and Adsorption

摘　　要：本文以琥珀酸酐与三羟甲基丙烷反应，制得了含有羟基和羧基的酯类亲水性单体，并以止匕单体与TDI和PPG－1000反应，制得了含有羧基的聚氨酯预聚体，在三乙醇胺水溶液中分散得到了水性聚氨酯（简称WPU）。本文对预聚体的溶剂种类和用量，对乳胶粒的大小及形状的影响进行了研究，确认溶剂的用量越大，乳胶的粒径就越小；以南酮作溶剂，乳胶粒为棒状或橄榄球状，而以丁酮为溶剂；得到的乳胶粒为圆球状。通过改变亲水单体的用量，提高羧基含量不但可以降低乳胶粒的粒径，而且还可以提高水性聚氨酯涂膜的断裂伸长率和断裂强度。The synthesis and propel-ties of waterborne polyurethane is investigated. At first, the hydrophilic monomer with carboxyl and hydroxyl group is synthesized by the reaction of succinic anhydride and trimethanol propane. The ketone solution of polyurethane prepared with TDI-80, PPG-1000 and the hydrophilic monomer could be dispersed in water containing triethanolamine. If the solvent is acetone, the PU particle is club-shaped, however, if the solvent is MEK, the particle is round. It is found that the more the hydrophilic monomer is added, the smaller the PU particla is, higher the tensile strength of WPU films.

关 键 词：水性聚氨酯 WPU 聚氨酯水乳液 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业] O633.221[理学—高分子化学]