Preparation and coating properties of alkyd polyol-based autoxidizable waterborne polyurethane dispersions with high fatty acid content, long storage stability, and low viscosity

Lin, Zecheng; Zeng, Qingyuan; Zhang, Yucheng; Ding, Yongbo; Chen, Shuai; Qiao, Yongluo; Shen, Liang

doi:10.1007/s11998-024-00928-1

J Coat Technol Res

2024

DOI: 10.1007/s11998-024-00928-1

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Preparation and coating properties of alkyd polyol-based autoxidizable waterborne polyurethane dispersions with high fatty acid content, long storage stability, and low viscosity

Zecheng Lin,

Qingyuan Zeng,

Yucheng Zhang

et al.

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Influence of Mixing and Standing Times on the Rheological Properties and Performance of Coatings for Lost Foam Shell Casting

Sun,

Wang,

Luan

2024

Coatings

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This study investigates the rheological properties and performance of coatings used in lost foam shell casting, focusing on the influence of mixing and standing times. The experimental procedure involved systematically preparing coatings by varying the mixing times (10, 20, 30, 40, 50, and 60 min) to assess the dispersion of particles and the subsequent standing times (1, 7, 11, 24, 40, and 48 h) to evaluate the stability of the mixture. A rotational viscometer was utilized to measure the viscosity and shear stress of the coatings under different conditions. The results indicate a significant decrease in viscosity with increasing mixing time, stabilizing after 50 min due to the uniform dispersion of solid particles and shear-thinning behavior. Conversely, the viscosity initially increases with prolonged standing time as the binder’s molecular chains reform, reaching a peak before gradually decreasing. The optimal performance of the coatings, characterized by stable viscosity and consistent rheological properties, was achieved with a mixing time of at least 50 min and a standing time not exceeding 40 h. These findings provide critical insights into optimizing the preparation and application processes of coatings, ensuring enhanced efficiency and quality in lost foam shell casting.

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Influence of Mixing and Standing Times on the Rheological Properties and Performance of Coatings for Lost Foam Shell Casting

Sun,

Wang,

Luan

2024

Coatings

View full text Add to dashboard Cite

show abstract

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Preparation and coating properties of alkyd polyol-based autoxidizable waterborne polyurethane dispersions with high fatty acid content, long storage stability, and low viscosity

Cited by 1 publication

References 54 publications

Influence of Mixing and Standing Times on the Rheological Properties and Performance of Coatings for Lost Foam Shell Casting

Influence of Mixing and Standing Times on the Rheological Properties and Performance of Coatings for Lost Foam Shell Casting

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