环氧树脂改性聚氨酯水乳液稳定性的研究  

Study on Stability of Waterborne Epoxy Resin Modified Polyurethane

作　　者：朱伟[1] 王芳[1] 吕菲菲[1] 杨花娟[1] 汤嘉陵[1] 

机构地区：[1]四川大学高分子科学与工程学院,成都610065

出　　处：《涂料工业》2010年第5期47-49,共3页Paint & Coatings Industry

摘　　要：以乳化前掺混环氧树脂的方式制备了一系列环氧树脂改性聚氨酯水乳液,通过红外光谱(FT-IR)、透射电镜(TEM)等手段表征了乳液在贮存过程中的化学结构及乳胶粒子形态的变化,发现乳液在存放期间容易破乳的主要原因是由于水乳液聚氨酯分子侧链上亲水基团羧基与环氧树脂中环氧基团发生缓慢的化学反应造成的。A series of waterborne polyurethane modified with epoxy resin, which was mixed into prepolymer before emulsification, were prepared. The structure and morpologieal change of waterborne polyurethane/epoxy resin （WPU/EP） emulsion during storage was characterized by Fourier transform infrared - spectroscopy （FT- IR） and transmission electronic microscope （TEM）. The results indicated that the reason of demulsifieation was mainly related to the reaction between carboxyl and epoxy groups.

关 键 词：水性聚氨酯 环氧树脂 乳液稳定性 

分 类 号：TQ630.4[化学工程—精细化工]