制备高固含量水性聚氨酯乳液的影响因素  

Influence factors on preparation of aqueous polyurethane emulsion with high solid content

作　　者：颜志鸿[1] 徐强[1] 朱宏[1] 王晓鸣[1] 胡春圃[1] 

机构地区：[1]华东理工大学材料科学与工程学院,上海200237

出　　处：《合成橡胶工业》2007年第2期93-96,共4页China Synthetic Rubber Industry

摘　　要：以二异氰酸酯和聚酯二元醇合成聚氨酯预聚体,采用二羟甲基丙酸为亲水剂,制备了高固含量（总固物质量分数约50%）的水性聚氨酯（APU）乳液,研究了制备APU乳液的影响因素。结果表明：羧基质量分数为0.8%-1.3%、预聚体中NCO/OH（摩尔比）为1.5-1.9、助溶剂丙酮质量分数为5%左右,可制得高固含量APU乳液。选用结晶性较好的聚酯二元醇和碱性较强的中和剂有利于制备高固含量APU乳液。With dimethylol propionic acid as a hydrophilic agent, a series of high solid content （mass fraction of solid about 50% ） polyurethane emulsions were prepared with diisocyanate and polyester diol. The influence factors on preparation of aqueous polyurethane （APU） emulsion were studied. The results showed that the stable high solid content APU emulsion was conveniently obtained with polyurethane prepolymers when mass fraction of carboxyl was 0.8%- 1.3 %, NCO/OH （mole ratio） was 1.5 - 1.9 and mass fraction of cosolvent acetone was 5%. Furthermore, it was helpful for preparation of high solid content APU emulsion to choose polyester diols with better crystallinity and neutralization agent with stronger alkaline.

关 键 词：水性聚氨酯 高固含量 二异氰酸酯 聚酯二元醇 助溶剂 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]