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<p>Based on Newman's “Six Rules,” neopentyl glycol (NPG) was selected as alcohol component and trimellitic anhydride (TMA) as hydrophilic monomer to synthesize waterborne polyester resin (WPE) with good storage stability. Chemical structure and properties of WPE were characterized by fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), and thermogravimetry (TG). The influence of the type and content of reactant on the properties of WPE were investigated. In addition, the performance of coating films were also studied. Experimental results showed that both acid value and molecular weights of WPE increased with increasing content of TMA, and the molecular weights distribution broadened slightly. The temperature of the maximum weight loss rate and glass transition temperature (<i>Tg</i>) increased. However, the storage stability decreased. Upon crosslinking, coating films derived from WPE with increasing content of trimethylolpropane (TMP) exhibited better water resistance, higher gloss, and greater hardness. Good optimal performance was achieved when the content of TMA and TMP was 8% and 12%, respectively. WPE with suitable acid value, controlled molecular weights, good storage stability, and desirable coating film properties were sucessfully prepared.</p>

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Preparation and performance of waterborne polyester with good storage stability

  • 期刊论文

  • 发表日期：

    2026年3月6日

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  • Wenbo Li,
  • Yanru Hou,
  • Xin Ding,
  • Chunlei Cao,
  • Jianying Ma

摘要

Based on Newman's “Six Rules,” neopentyl glycol (NPG) was selected as alcohol component and trimellitic anhydride (TMA) as hydrophilic monomer to synthesize waterborne polyester resin (WPE) with good storage stability. Chemical structure and properties of WPE were characterized by fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), and thermogravimetry (TG). The influence of the type and content of reactant on the properties of WPE were investigated. In addition, the performance of coating films were also studied. Experimental results showed that both acid value and molecular weights of WPE increased with increasing content of TMA, and the molecular weights distribution broadened slightly. The temperature of the maximum weight loss rate and glass transition temperature (Tg) increased. However, the storage stability decreased. Upon crosslinking, coating films derived from WPE with increasing content of trimethylolpropane (TMP) exhibited better water resistance, higher gloss, and greater hardness. Good optimal performance was achieved when the content of TMA and TMP was 8% and 12%, respectively. WPE with suitable acid value, controlled molecular weights, good storage stability, and desirable coating film properties were sucessfully prepared.