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Open AccessArticle

Preparation and Performance Optimization of Two-Component Waterborne Polyurethane Locomotive Coating

1
School of Physics, Qingdao University, Qingdao 266071, China
2
State Key Laboratory of Marine Coatings, Marine Chemical Research Institute Co., LTD., Qingdao 266071, China
3
Chevron Science Center, Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260, USA
*
Authors to whom correspondence should be addressed.
Coatings 2020, 10(1), 4; https://doi.org/10.3390/coatings10010004
Received: 22 November 2019 / Revised: 13 December 2019 / Accepted: 14 December 2019 / Published: 18 December 2019
This paper reports the effects of different formulas on the performance of waterborne polyurethane (WPU), including two-component WPU and curing agent, wetting dispersant, defoaming agent, and wetting agent. The optimization of rheological additives selection, through the optimization of coating physical properties and chemical properties, can make the film show uniform color and appearance without pinholes, bubbles, or wrinkles, and have a long probation period. Through the analysis of performance after a 1000-h quick ultraviolet (QUV) aging test, the light reduction rate is 23.19%, and the color difference is 1.9. As can be seen from the scanning electron microscope (SEM) image and the three-dimensional stereomicroscope, the film shows relatively uniform dispersion, good compactness, and smooth surface. The two-component WPU topcoat is found to have high gloss 87.1 (60°) and high weather resistance, which provides a positive indication for the modulation and production of waterborne locomotive paint. View Full-Text
Keywords: two-component; waterborne polyurethane paint; locomotive topcoat two-component; waterborne polyurethane paint; locomotive topcoat
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Liu, H.; Bi, Z.; Wan, Z.; Wang, X.; Wan, Y.; Guo, X.; Cai, Z. Preparation and Performance Optimization of Two-Component Waterborne Polyurethane Locomotive Coating. Coatings 2020, 10, 4.

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