Study on Coating Properties of Waterborne Polyurethane Modified Epoxy Resin Latex

被引：0
|
作者：
Wang Y. [1 ]
Hou L. [2 ]
Liu Z. [1 ]
Li S. [1 ]
Li Z. [2 ]
机构：
[1] College of Civil Engineering, Yantai University, Yantai
[2] College of Chemistry and Chemical Engineering, Yantai University, Yantai
来源：
Cailiao Daobao/Materials Reports | 2019年 / 33卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Coating; Performance; Toughening; Waterborne epoxy resin; Waterborne polyurethane;
D O I：
10.11896/cldb.18050147
中图分类号：
学科分类号：
摘要：
Waterborne polyurethanes with diverse particle sizes were prepared first. Then, the influence of adding waterborne polyurethanes with diffe-rent particle sizes and amounts in epoxy resin latex on the tensile properties and elongation at break of the modified epoxy resin film were investigated. The impact properties, flexibility, corrosion resistance, gloss and other properties of the modified epoxy resin coating were analyzed. The results indicated that the modified epoxy resin with the best toughening effect was prepared by adding 5% waterborne polyurethane with particle size of 50 nm. Compared to the epoxy coating without modification, the modified epoxy resin coating exhibited the increase of 30%, 62%, and 143% in tensile strength, elongation at break, and fracture energy, while the modulus of elasticity of the modified coating did not decrease. It could be observed from SEM results that fracture surface of the modified coating was rich in stripes and layers, showing the characteristics of ductile fracture. This might be explained by the addition of waterborne polyurethane that made the stress on the modified epoxy resin coa-ting be effectively dispersed when subjected to external force. In addition, the properties of the coating, including impact resistance, flexibility, glossiness, acid resistance and alkali resistance, were also improved evidently. © 2019, Materials Review Magazine. All right reserved.
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页码：2456 / 2460
页数：4
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