全文下载：2013050479
马德荣， 胡正水*
（青岛科技大学 材料科学与工程学院，山东 青岛 266042）
摘要：以异佛尔酮二异氰酸酯（IPDI）、聚酯多元醇、2，2-二羟甲基丁酸（DMBA）为主要原料，经自乳化法制备出高固含量的IPDI型水性聚氨酯乳液。研究了乳化温度、小分子二元醇、扩链剂等不同因素对乳液黏度和胶粒粒径、胶粒形貌的影响，结果表明：当DMBA质量分数为5.5%、乳化温度为2 ℃时，制备的乳液固含量高达45%，乳液黏度较低，稳定性好；加入乙基丁基丙二醇（BEPD）或扩链剂异佛尔酮二胺（IPDA）有利于调节分子间相互作用力而使粒径变小，乳液黏度变低；利用非离子型亲水扩链剂三羟甲基丙烷聚乙二醇单甲醚（TMPEG）与DMBA的协同效应有利于乳液稳定性的提高。
关键词：水性聚氨酯乳液； 黏度； 粒径； 稳定性
中图分类号： TQ 323.8文献标志码： A
Apparent Properties of Waterborne Polyurethane Emulsion
MA De-rong, HU Zheng-shui
(CollegeofMaterials Scienceand Engineering,QingdaoUniversityof Science and Technology,Qingdao266042,China)
Abstract:A high solid-containing waterborne polyurethane emulsion was prepared using isophrone diisocyanate (IPDI), polyester polyol and 2, 2-dimethylol butyric acid (DMBA) as materials by self-emulsification method. The effects of emulsification temperature, small molecular diol and chain extender on emulsion viscosity, particle size and colloid morphology were investigated. The results showed that the solid content of emulsion with low viscosity and good stability could reach 45% when DMBA mass fraction was 5.5% and emulsification temperature was2℃. Adding 2-butyl-2-ethyl-1, 3-propanediol (BEPD) or chain extender isophoron diamine (IPDA), the particle size became smaller and the emulsion viscosity became lower by adjustment of intermolecular interaction. Moreover, emulsion stability could be improved by using non-ionic hydrophilic chain extender trimethylolpropane polyethylene glycol monomethyl ether (TMPEG) which could shield the micelle electrostatic repulsion by means of synergy.
Key words:waterborne polyurethane; viscosity; particle size; stability
收稿日期：2012-11-09
作者简介： 马德荣（1986—），男，硕士研究生.*通信联系人.
