聚氨酯多元醇水分散体的合成  

Synthesis of Waterborne Polyurethane Polyol Dispersions

作　　者：张旭东[1] 胡军保[1] 吴娇[1] 钱帆[1] 王雪[1] 

机构地区：[1]湖南大学化学化工学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2011年第4期51-56,共6页Journal of Hunan University:Natural Sciences

摘　　要：以异佛尔酮二异氰酸酯（IPDI）,聚醚二元醇（N210）,二羟甲基丙酸（DMPA）,三羟甲基丙烷（TMP）为主要原料制备端-NCO聚氨酯预聚体,用二乙醇胺（DEA）封端引入羟基,合成了双组分水性聚氨酯的聚氨酯多元醇分散体组分.研究发现：DMPA,TMP的用量、羟基含量及分散体与固化剂组分的配比等因素显著影响分散体及涂膜的性能.当DMPA质量分数为6%~6.5%,TMP质量分数为3%~5%,DEA质量分数为7.61%,nNCO∶nOH为1.5~1.7时,涂膜的光泽度、硬度、耐溶剂性、耐水性等最佳.采用傅立叶变换红外光谱、扫描电镜等仪器对多元醇合成过程和双组分水性聚氨酯涂膜进行了表征.A polyurethane polyol dispersions of two-package waterborne polyurethane have been successfully synthesized with diethanolamine（DEA） as the blocking agent for introducing hydroxy-terminated on to the end-NCO polyurethane prepolymers,which were prepared beforehand with isophorone diisocyanate（IPDI）,polyether binary alcohol（N210）,dimethylol propionic acid（DMPA）,and trimethylolpropane（TMP） as the main raw materials.The properties of the dispersions and films such as gloss,hardness,solvent resistance,water resistance were significantly affected by the amount of DMPA,TMP,hydroxy contents and the ratio of dispersions to curing agents.The optimum performance was obtained with the content of DMPA,TMP and DEA reaching 6%～6.5%,3%～5% and 7.61% respectively,and the ratio of curing agents to dispersions being 1.5～1.7.Furthermore,the synthetic process of the polyol dispersions and the 2K-WPU films were characterized by multiple devices such as FTIR and SEM.

关 键 词：水性聚氨酯 双组分 聚氨酯多元醇 分散体 涂料 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]