UV-curable coatings have been receiving more and more attention for their high performance and environmentally friendly advantages, which meet the “5 E” requirements of coating development. Vinyl oligomer is the main factor affecting the performance of UV-curable coating, but it is difficult to meet the requirements of high-end UV curing technology due to its high viscosity, low vinyl functionality, and high cost. Herein, polyesters with lateral double bonds were prepared by ring-opening polymerization of acid anhydride and glycidyl methacrylate. The epoxy compound without vinyl groups was used to participate in the polymerization reaction to adjust the viscosity and vinyl functionality of the resin. Furthermore, the molecular structure and molecular weight of the polyesters were characterized by FTIR, ¹H NMR, and GPC. The effects of the categories and proportions of acid anhydride and glycidyl ether on the viscosity and hardness of the coating films were studied. The results indicated that the use of acid anhydrides containing phenyl rigid groups could significantly increase the hardness of the paint film, and the long-chain tertiary glycidyl carbonate (E10P) had the best viscosity reduction effect. When the molar ratio of acid anhydride, GMA and E10P was 4:1:3, the viscosity of the prepared vinyl polyester was low to 2755 mPa·s. In this case, the hardness of the paint film was as high as H, and it also exhibited excellent water resistance and alcohol resistance.

紫外光固化涂料以其高性能、环保的优势越来越受到重视，符合涂料发展的“5E”要求。乙烯基低聚物是影响UV固化涂料性能的主要因素，但由于其粘度高、乙烯基官能度低、成本高，难以满足高端UV固化技术的要求。在本文中，通过酸酐和甲基丙烯酸缩水甘油酯的开环聚合制备具有侧向双键的聚酯。使用不含乙烯基的环氧化合物参与聚合反应以调节树脂的粘度和乙烯基官能度。此外，聚酯的分子结构和分子量通过 FTIR 表征，¹H NMR 和 GPC。研究了酸酐和缩水甘油醚的种类和比例对涂膜粘度和硬度的影响。结果表明，使用含苯基刚性基团的酸酐可显着提高漆膜硬度，其中长链叔碳酸缩水甘油酯（E10P）降粘效果最好。当酸酐、GMA和E10P的摩尔比为4:1:3时，制备的乙烯基聚酯的粘度低至2755 mPa·s。在这种情况下，漆膜的硬度高达H，并且还表现出优异的耐水性和耐醇性。