水性聚氨酯改性环氧树脂乳液的涂膜性能研究

doi:10.11896/cldb.18050147

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Abstract 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.

Key words： waterborne polyurethane waterborne epoxy resin toughening coating performance

Published: 19 June 2019

CLC number:

TQ323.5

Fund:This work was financially supported by the National Natural Science Foundation of China (51678512, 51278443), Key Research and Development Plan Project of Shandong Province (2017GGX70107), Yantai University Graduate Innovation Fund (YDYB1809).

About author:: Yulong Wang, master graduate student,mainly studies the corrosion resistance of coatings.Zhiyong Liu, professor at Yaitai University. Main research interests are the durability and durability improvement technology of concrete materials and structures, corrosion protection and repair technology for reinforced concrete. More than 50 academic papers have been published in important journals at home and abroad, more than 30 of these papers have been inclu-ded in the SCI/EI database. 5 national invention patents were authorized and one monograph were published.

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	WANG Yulong
	HOU Lijie
	LIU Zhiyong
	LI Shiyu
	LI Zhuohui

Cite this article:

WANG Yulong,HOU Lijie,LIU Zhiyong, et al. Study on Coating Properties of Waterborne Polyurethane Modified Epoxy Resin Latex[J]. Materials Reports, 2019, 33(14): 2456-2460.

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http://www.mater-rep.com/EN/10.11896/cldb.18050147 OR http://www.mater-rep.com/EN/Y2019/V33/I14/2456

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