陕西师范大学学报（自然科学版）2026，Vol.54Issue(1)：84-93,10.DOI:10.15983/j.cnki.jsnu.2026009
水性聚酯改性聚氨酯的合成及其在水性涂料中的应用
Synthesis of water-based polyester-modified polyurethane and its application in waterborne coatings
摘要
Abstract
Using isophorone diisocyanate(IPDI)as the isocyanate monomer,1,4-butanediol(BDO),2,2-bis(hydroxypropyl)propionic acid(DMPA)and synthesized dihydroxy disulfide(HEDS)as chain extenders,post-polymerization modification was performed on self-made side-chain polyether-type waterborne polyesters(WCPEs)to prepare a series of waterborne polyurethane dispersions(WPUDs)with molecular weights around 8× 103 and good storage stability.Ultraviolet(UV)-curable WPUD films were fabricated using 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone as the photoinitiator.Comparative studies with the commercially available waterborne polyurethane-based pigment wetting dispersant WQ-206 revealed that the synthesized WPUDs significantly enhanced pigment grinding efficiency,reduced pigment particle size and ink viscosity,improved pigment color development,and strengthened the anti-floating and anti-flocculation capabilities of the coating film.Additionally,leveraging the synergistic effect between residual double bonds in the main chain and the photoinitiator,the UV-cured nonionic polyurethane films exhibited high transparency and a markedly lower water absorption rate(≈6％)compared to traditional ionic polyurethanes(＞48％).Starting from molecular structure design,this study improved the application performance of polyurethanes through the synergistic optimization of nonionic side-chain architecture,incorporation of dynamic disulfide bonds,and UV-curing processes.The findings provide valuable guidance and reference for the development of multifunctional waterborne polyurethane materials.关键词
水性聚酯/聚氨酯/颜料润湿分散剂/水性涂料Key words
waterborne polyester/polyurethane/pigment wetting dispersant/waterborne coatings分类
化学化工引用本文复制引用
付豪,龚林波,龚淑玲..水性聚酯改性聚氨酯的合成及其在水性涂料中的应用[J].陕西师范大学学报（自然科学版）,2026,54(1):84-93,10.基金项目
国家自然科学基金(52373104) （52373104）
