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

Liu, Haonan; Bi, Zhijie; Wan, Zhong; Wang, Xianming; Wan, Yong; Guo, Xiangxin; Cai, Zhongyu

doi:10.3390/coatings10010004

Cited by 3 publications

(3 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As has already been mentioned, PURs are, in most cases, two-component systems whereby the individual components are supplied separately in liquid or semi-liquid states and the final curing process occurs only after they have been properly mixed together [ 12 , 13 , 14 ]. Common 2K systems are simply PURs or epoxies and silicones.…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Study of Polyurethane Potting Compounds Doped with Magnesium Oxide Nanoparticles

et al. 2023

View full text Add to dashboard Cite

Recently, polyurethanes (PURs) have become a very promising group of materials with considerable utilization and innovation potential. This work presents a comprehensive analysis of the changes in material properties important for PUR applications in the electrical industry due to the incorporation of magnesium oxide (MgO) nanoparticles at different weight ratios. From the results of the investigations carried out, it is evident that the incorporation of MgO improves the volume (by up to +0.5 order of magnitude) and surface (+1 order of magnitude) resistivities, reduces the dielectric losses at higher temperatures (−62%), improves the thermal stability of the material, and slows the decomposition reaction of polyurethane at specific temperatures (+30 °C). In contrast, the incorporation of MgO results in a slight decrease in the dielectric strength (−15%) and a significant decrease in the mechanical strength (−37%).

show abstract

Section: Introductionmentioning

confidence: 99%

A Comprehensive Study of Polyurethane Potting Compounds Doped with Magnesium Oxide Nanoparticles

et al. 2023

View full text Add to dashboard Cite

show abstract

“…They found that coatings based on resins with more hydroxyl groups typically have a stronger wet adhesion and salt spray resistance. According to Liu et al [14], the performance of waterborne polyurethane was affected by various formulations of the two components as well as its curing agent, wetting dispersant, defoamer, and wetting agent. The prepared two-component waterborne polyurethane topcoat had a high gloss and high weather resistance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Coating Process on Properties of Two-Component Waterborne Polyurethane Coatings for Wood

Liu

2022

Coatings

View full text Add to dashboard Cite

Acrylic acid has good environmental weather resistance, water resistance, alcohol resistance, dirt resistance, and other properties. An acrylic acid dispersion with a core–shell structure was prepared and reacted with a polyisocyanate-type curing agent to prepare a waterborne polyurethane topcoat suitable for wood. The prepared two-component polyurethane topcoat was used in combination with a waterborne primer and a waterborne sealing primer and applied to Pine (Pinus strobus) boards to carry out gloss, wear resistance, and adhesion experiments. The effects of different coating amounts and spraying times on the comprehensive properties of the wood coatings were studied. The experimental results showed that when the self-made two-component polyurethane topcoat for wood was matched with the primer and the sealing primer, the coating amount of the sealing primer had little effect on improving the adhesion and wear resistance but had a significant effect on the gloss. The spraying times of the primer and the topcoat greatly impacted the adhesion, but they had no decisive impact on the improvement of the gloss. When the coating amount was 60 g/m2 for the waterborne sealing primer, 100 g/m2 for waterborne primer, and 120 g/m2 for the self-made topcoat and the coating was sprayed twice, the comprehensive performance of the obtained film on the wood was the best. This research on the preparation and coating process optimization of the two-component waterborne polyurethane coatings for wood can provide a technical basis for the application of two-component waterborne polyurethane topcoats for wood.

show abstract

“…In the polyurethane coatings, bubble-free film thickness (BFFT) is used to describe the index of two-component waterborne polyurethane coatings [ 14 ]. At present, BFFT of waterborne polyurethane coatings is about 80 μm, which is lower than that of solvent-based coatings (which is about 100 μm) [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Self-Assembly of Amphiphilic Linear−Dendritic Carbosilane Block Surfactant for Waterborne Polyurethane Coating

Jiang

Wang

2020

Polymers

View full text Add to dashboard Cite

The traditional two-component waterborne polyurethane coating system cannot effectively inhibit the undesirable side reaction between polyisocyanate and water during curing hardening. It is difficult to avoid the microbubbles formed by this reaction during the film formation process, which severely degrades the appearance and decreases the performance of the film. Therefore, the addition of an amphiphilic Linear-Dendritic carbosilane Block Surfactant (LDBS) to the hardener can physically separate the polyisocyanate emulsion from water through self-assembly. The bubble-free film thickness (BFFT) of the two-component waterborne polyurethane coating in this study is approximately 1.5-fold greater than commercial waterborne polyurethane coatings in today’s coating industry. Fourier transform infrared spectroscopy (FT-IR) varied the effectiveness of LDBS for inhibition of the undesirable side reaction. The successful application of the waterborne polyurethane coating with LDBS on the 600 km/h high-speed maglev train provides a technical solution for large-scale industrialization of waterborne polyurethane coating and complete replacement of solvent polyurethane coating.

show abstract

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

Cited by 3 publications

References 34 publications

A Comprehensive Study of Polyurethane Potting Compounds Doped with Magnesium Oxide Nanoparticles

A Comprehensive Study of Polyurethane Potting Compounds Doped with Magnesium Oxide Nanoparticles

Effect of Coating Process on Properties of Two-Component Waterborne Polyurethane Coatings for Wood

Self-Assembly of Amphiphilic Linear−Dendritic Carbosilane Block Surfactant for Waterborne Polyurethane Coating

Contact Info

Product

Resources

About