Abstract: ［Objective］Solve the problems of slow film formation and low adhesion of tung oil-based waterborne coatings.［Methods］A method for preparing UV-curable tung oil-based waterbornelatex coatings was proposed by using double bond functionalized tung oil and polyvinyl acetatelatex/polystyrene（PVAc/PS） core-shell latex via external emulsification composite. By utilising themorphological effects of core-shell latex particles to accelerate the film-forming and water-drainageprocesses of the latex，and combining this with the UV-curing properties of modified tung oil，the curing rate and film properties of the waterborne latex were improved.［Results］Taking pentaerythritol triacrylate（PETA）modified tung oil composite latex as the research object，after adjusting the water-oil ratio and optimizing the emulsifier dosage，combined with particle size distribution and microstructure analysis，it was found that when the emulsifier addition amount was 6% and the water-oil ratio was 7∶3，the latex exhibited uniform particle size dispersion and excellent stability. UV-curingperformance tests showed that high oil phase or high emulsifier addition amount could shorten thecuring time，rapid UV-curing could be achieved in as fast as 22 seconds，and the UV-curing efficiencywas excellent. When the oil phase proportion was high or the emulsifier content was high，the peak value of the stress-strain curve of the paint film was high，the adhesion was stably maintained at level 1 or 0，and at the same time，the gloss was improved and the roughness was reduced.［Conclusion］ Through the coordinated control of the water-oil ratio and emulsifier，tung oil-based waterborne latex coatings with good dispersion stability，rapid UV-curing and adjustable film properties can be prepared，providing technical support for the application of natural vegetable oil-based environmentallyfriendly coatings.

Key words: tung oil, waterborne latex coating, UV-curing

摘要： 【目的】解决桐油水性涂料成膜速度慢、附着力低的问题。【方法】采用双键功能化桐油与聚醋酸乙烯酯 /聚苯乙烯（ PVAc/PS）核壳乳胶粒通过外乳化复合策略制备光固化桐油基水性乳胶涂料的方法，利用核壳乳胶粒形貌效应加速乳胶成膜排水过程，结合改性桐油光固化特性，提高水性乳胶固化速率与涂层性能。【结果】以季戊四醇三丙烯酸酯（ PETA）改性桐油复合乳胶为研究对象，经水油比调控和乳化剂优化，结合粒径分布与微观形貌分析，可知当乳化剂添加量为 6%、水油比为 7∶3时，乳胶粒径分散均一，稳定性优异。光固化性能测试显示，高油相或高乳化剂添加量可缩短固化时间，最快 22 s可现实光固化，光固化效率优异。当油相占比高或乳化剂含量高时，涂膜应力 -应变曲线峰值高，附着力稳定在 1级或 0级，同时光泽提升、粗糙度降低。【结论】通过水油比与乳化剂协同调控，可制备兼具良好分散稳定性、快速光固化且涂膜性能可调的桐油基水性乳胶涂料，为天然植物油基环保涂料应用提供技术支撑。

关键词: 桐油, 水性涂料, 光固化

CLC Number: 

• TQ637