Research on the Curing Mechanisms of Epoxy Latex Coatings at Ambient Temperature Comparison with Solvent-type Ones
The performance and behavior of epoxy latex coatings are different from solvent-type ones. It is controlled by the distinct curing mechanisms. The solvent-type epoxy film obtained from epoxy resin and curing agent by homogeneous reaction, namely, the state of epoxy resin and curing agent is uniform. However, epoxy latex film is made from epoxy resin emulsion or dispersion and water soluble amine by polyphase reaction. So the determination of potlife of epoxy latex can be showed by film gloss changes with residence time, dissimilar with solvent-type by the index of viscosity. The modern infrared spectrum measure shows that the epoxy groups in the dried epoxy latex film exist even if EEW to HAV proportion is 1.2:1. This also testifies the incomplete polyphase reaction mechanisms of epoxy emulsion coating curing at ambient temperature.
Epoxy latex coating Solvent-type epoxy coating Curing mechanism Potlife Infrared spectrum
GUO Qing-quan LI Da-guang CHEN Huan-qin
Faculty of chemical engineering and light industry, Guangdong University of Technology, Guangzhou Un School of chemical and energy engineering, South china University of Technology, Guangzhou510640, Ch
国际会议
第四届中日化工学术研讨会(The 4th Joint China/Japan Chemical Engineering Symposium)(CJCES)
成都
英文
2007-12-19（万方平台首次上网日期，不代表论文的发表时间）