【摘要】 以聚乙二醇和甲苯二异氰酸酯为主原料,甲基丙烯酸-β-羟乙酯为封端剂,22,-二羟甲基丙酸(DMPA)为亲水扩链剂,二月桂酸二丁基锡为催化剂,采用逐步聚合法合成了一种水性光敏聚氨酯超分散剂(WUVPU),研究了DMPA加入量、中和剂的类型、中和度及NCO/OH摩尔比等因素对反应的影响,并用红外光谱及核磁共振氢谱对产物结构进行了表征。结果表明,DMPA加入量为总质量分数的7%、NCO/OH摩尔比为1.0、三乙胺为中和剂、中和度为100%时,WUVPU的分散效果最佳。更多还原

【Abstract】 With gradually polymerization technique,waterborne photosensitive polyurethane hyperdispersant(WUVPU)was synthesized using polyethylene glycol,toluene diisocyanate as materials,β-hydroxyethyl methacrylate as blocking agent,2,2-dimethylol propionic acid as hydrophilic chain extender and dibutyltion dilaurate as catalyst.The influence factors were studied,such as the amount of DMPA addition,type of neutralizers,the extent of neutralization and NCO/OH mole ratio and so on.The product structure was characterized by FT-IR and 1H-NMR spectrum.The results showed that the appropriate reaction condition was as fallows: the amount of DMPA addition was 7%,NCO/OH mole ratio was 1.0,neutralizer was triethylamine,the extent of neutralization was 100%.Under this condition,the disperse effect of the WUVPU was optimum.更多还原