Preparation and performance of waterborne polyester with good storage stability

IF 3.4 4区材料科学 Q2 CHEMISTRY, APPLIED

Journal of Coatings Technology and Research Pub Date : 2026-03-06 DOI:10.1007/s11998-025-01212-6

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

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引用次数: 0

Abstract

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.

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贮存稳定性好的水性聚酯的制备及性能研究

以Newman’s Six Rules为基础，选择新戊二醇（NPG）为醇组分，偏三酸酐（TMA）为亲水性单体，合成了具有良好贮存稳定性的水性聚酯树脂（WPE）。采用傅里叶红外光谱（FTIR）、凝胶渗透色谱（GPC）、差示扫描量热法（DSC）和热重法（TG）对WPE的化学结构和性能进行了表征。研究了反应物种类和含量对WPE性能的影响。此外，还对涂层的性能进行了研究。实验结果表明，随着TMA含量的增加，WPE的酸值和分子量均有所增加，分子量分布略有变宽。最大失重速率温度和玻璃化转变温度（Tg）升高。但贮藏稳定性下降。交联后，三甲基丙烷（TMP）含量增加的WPE涂层具有更好的耐水性、更高的光泽度和更高的硬度。TMA和TMP含量分别为8%和12%时，效果最佳。成功制备了酸值适宜、分子量可控、贮存稳定性好、涂膜性能理想的WPE。

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来源期刊

Journal of Coatings Technology and Research 工程技术-材料科学：膜

CiteScore

4.30

自引率

8.70%

发文量

130

审稿时长

2.5 months

期刊介绍： Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.