Cationic waterborne polyurethane coatings: enhanced performance through modified formulation
A new study reveals how the addition of acrylic acid and amino acids can significantly improve the properties of cationic waterborne polyurethane coatings.
Recent research has investigated the impact of acrylic acid on cationic waterborne polyurethane coatings. The study highlights that adding acrylic acid at various concentrations markedly enhances the stability and chemical resistance of the coatings. Notably, analysis indicates that the chemical resistance and stability of the coatings improved with increasing levels of acrylic acid, with 21% being the optimal concentration. While the hardness of the coating increased, adhesion decreased as the acrylic acid content rose.
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Another focus of the study was the use of amino acids as environmentally friendly neutralizing agents. Their incorporation led to the formation of a reticular crosslinked structure, significantly improving the mechanical properties of the cationic waterborne polyurethane coatings. Compared to conventional acids like hydrochloric and acetic acid, amino acids provide a non-toxic and eco-friendly alternative that favors the industrial production and application of these coatings.
The findings of this study present promising approaches for enhancing the performance and environmental sustainability of cationic waterborne polyurethane coatings, opening new avenues for their use in various industrial applications.
Source: Journal of Coatings Technology and Research, Volume 21, pages 879–892 (2024)
