复合乳化剂制备水性环氧乳液及涂膜性能研究  

Study on Preparation of Waterborne Epoxy Emulsion with Composite Emulsifier and Its Film Properties

作　　者：黄娟萍[1] 李素芳[1] 李娇[1] 康萌[1] 韩天衡[1] 

机构地区：[1]湖南大学化学化工学院,化学生物传感与计量学国家重点实验室,长沙410082

出　　处：《涂料工业》2013年第6期38-43,共6页Paint & Coatings Industry

基　　金：湖南省科技计划项目(2012GK3155);湖南省大学生创新实验计划项目(521298651)

摘　　要：采用环氧树脂E-44和2-氨基-5-磺酸基苯甲酸合成一种小分子阴离子环氧乳化剂EP-H;通过E-44和聚乙二醇6000合成大分子非离子环氧乳化剂EP-PEG。当2种乳化剂以质量比2∶5复配时,可达到较好的亲水亲油平衡。复合乳化剂(EP-H/EP-PEG)占10%、乳化温度为60℃时,制得的环氧乳液性能最佳。与单一非离子乳化剂制得的水性环氧乳液相比,EP-H/EP-PEG所制备的乳液相反转固含量高(>70%)、乳化剂用量小、乳液粒径小、黏度低;固化后的涂膜光滑致密、热稳定性佳、综合力学性能好,其拉伸强度和压缩强度分别为31 MPa、72 MPa。A giant molecule nonionic epoxy resin emulsifier EP- PEG was prepared with epoxy resin E -44 and PEG6000 and a small molecule anion epoxy emulsifier EP - H was pre- pared with epoxy resin E - 44, and 2 - amino - 5 - sulfobenzoie acid. It was shown that a good HLB value could be obtained when the mass ratio of EP - H/EP - PEG was 2/5. The emulsion provided good properties at 10% of composite emulsifier and 60℃ of the emulsifying temperature. Compared with the waterborne emulsion prepared with a single nonionic emulsifi- er, composite emulsifier based epoxy emulsion showed advantages of high solid content in phase inversion（ above 70% ） , less emulsifier content, smaller particle size and low viscosity. The cured film was smooth and deused and also exhibited good mechanical properties and ther- mal stability, the tensile strength and bending strength were 31 MPa and 72 MPa respectively.

关 键 词：环氧树脂 非离子乳化剂 阴离子乳化剂 复合乳化剂 乳液 

分 类 号：TQ630.4[化学工程—精细化工]