The Mechanisms of Epoxy Latex Coatings Curing at Ambient Temperature Comparison with Solvent-type Ones

被引：0
|
作者：
Guo, Qingquan [1 ]
Li, Daguang [1 ]
Guo, Jianwei [1 ]
Chen, Huanqin [2 ]
机构：
[1] Guangdong Univ Technol, Fac Chem Engn & Light Ind, Guangzhou Univ City 510006, Peoples R China
[2] South China Univ Technol, Sch Chem & Energy Engn, Guangzhou 510640, Peoples R China
来源：
ADVANCES IN COMPOSITES, PTS 1 AND 2 | 2011年 / 150-151卷
关键词：
Epoxy Latex; Solvent-Type Epoxy Coating; Curing; Potlife; Infrared Spectrum;
D O I：
10.4028/www.scientific.net/AMR.150-151.1249
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
The performance and behavior of epoxy latex coatings are different from solvent-type ones. It is decided by the distinct curing mechanism. 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 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 mechanism of epoxy emulsion coating curing at ambient temperature.
引用
收藏
页码：1249 / +
页数：2
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