Abstract: ［Objective］To develop high-performance UV-curable coatings utilizing renewable resources，［Methods］soybean oil-based polyol（ESOR）was synthesized via the solvent-free ring-opening reaction of epoxidized soybean oil（ESO）with ricinoleic acid（RA）. A series of photoreactive epoxidized soybean oil-based polyurethane acrylate resins（ER-IH5，ER-IH7，and ER-IH9） were prepared by end-group modification of ESOR using the semi-addition product of isophoronediisocyanate and 2-hydroxyethyl acrylate. These resins served as the primary film-forming material toformulate UV-curable coatings. The effect of terminal double bond content on coating performance wassystematically investigated.［Results］As the results shown，with increasing double bond content in the photoreactive resins，the tensile strength，pencil hardness，gel content，and chemical resistance of the UV-cured coatings were significantly enhanced. And the ER-IH9 coating exhibited optimal performance：transmittance exceeding 95%，haze below 1%，tensile strength up to 26. 1 MPa，pencil hardness of 6H，adhesion grade of 0，gel content of 96. 5%，water absorption of only 0. 87%，and showed the lowest mass loss after immersion in acidic and alkaline media.［Conclusion］This UV-curable coating shows promising application in fields demanding high hardness and superior transparency.

Key words: epoxidized soybean oil, ricinoleic acid, polyurethane acrylate, UV-curable coatings

摘要： 【目的】利用可再生资源开发高性能 UV固化涂料。【方法】以环氧大豆油（ESO）与蓖麻油酸（RA）无溶剂开环制备大豆油基多元醇（ESOR）。利用异佛尔酮二异氰酸酯和丙烯酸羟乙酯的半加成产物对 ESOR的末端改性，合成了一系列环氧大豆油基聚氨酯丙烯酸酯光敏树脂（ER-IH5、ER-IH7及 ER-IH9）。以其为成膜物制备 UV固化涂料，系统考察了末端双键含量对涂料性能的影响。【结果】随着光敏树脂双键含量的增加，UV固化涂料的拉伸强度、铅笔硬度、凝胶含量及耐化学介质性显著增强。其中 ER-IH9涂料性能最优，透光率>95%、雾度<1%、拉伸强度 26. 1 MPa、铅笔硬度为 6H、附着力 0级、凝胶含量 96. 5%，吸水率仅 0. 87%，且在酸、碱介质中浸泡后质量损失最低。【结论】该 UV固化涂料在高硬度及高透明要求的领域展现出良好应用前景。

关键词: 环氧大豆油, 蓖麻油酸, 聚氨酯丙烯酸酯, UV固化涂料

CLC Number: 

• TQ637. 83