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<p>In this paper, four kinds of bio-based alkyd polyols were prepared from bio-based oleic acid and coconut oleic acid as raw materials. Subsequently, UV-curable waterborne polyurethane acrylate dispersions (UV-WPUAs) were synthesized using the four bio-based alkyd polyols, respectively. Furthermore, these UV-WPUAs were employed to prepare UV-curable waterborne polyurethane acrylate coatings (UV-WPUA coatings). The study focused on comparing the effects of the four bio-based alkyd polyols on the performance of the UV-WPUAs and the resulting UV-WPUA coatings. The results showed that all&#xa0;the UV-WPUAs prepared from the above four bio-based alkyd polyols exhibited semitransparent, low viscosity, small particle size and high zeta potential. Additionally, the UV-WPUA-2 (alkyd polyol was prepared from oleic acid, hexahydrophthalic anhydride, neopentyl glycol and trimethylolpropane) coating exhibited excellent coating properties, such as excellent physical properties, chemical resistance and acceptable yellowing resistance. This phenomenon can be attributed to the higher crosslinking density of the UV-WPUA-2 coating, along with the lack of a benzene ring structure that is typically associated with yellowing. In conclusion, the result of this study confirms that bio-based alkyd polyols are suitable for preparing UV-curable waterborne polyurethane acrylate.</p>

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UV-curable waterborne polyurethane acrylate coatings prepared from bio-based alkyd polyols

  • 期刊论文

  • 发表日期：

    2025年7月7日

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  • Yuan Duan,
  • Jing-Yi Li,
  • Yong-Bo Ding,
  • Yong-Luo Qiao,
  • Liang Shen,
  • Xin-Gui Li

摘要

In this paper, four kinds of bio-based alkyd polyols were prepared from bio-based oleic acid and coconut oleic acid as raw materials. Subsequently, UV-curable waterborne polyurethane acrylate dispersions (UV-WPUAs) were synthesized using the four bio-based alkyd polyols, respectively. Furthermore, these UV-WPUAs were employed to prepare UV-curable waterborne polyurethane acrylate coatings (UV-WPUA coatings). The study focused on comparing the effects of the four bio-based alkyd polyols on the performance of the UV-WPUAs and the resulting UV-WPUA coatings. The results showed that all the UV-WPUAs prepared from the above four bio-based alkyd polyols exhibited semitransparent, low viscosity, small particle size and high zeta potential. Additionally, the UV-WPUA-2 (alkyd polyol was prepared from oleic acid, hexahydrophthalic anhydride, neopentyl glycol and trimethylolpropane) coating exhibited excellent coating properties, such as excellent physical properties, chemical resistance and acceptable yellowing resistance. This phenomenon can be attributed to the higher crosslinking density of the UV-WPUA-2 coating, along with the lack of a benzene ring structure that is typically associated with yellowing. In conclusion, the result of this study confirms that bio-based alkyd polyols are suitable for preparing UV-curable waterborne polyurethane acrylate.