【目的】为了兼顾长碳链改性光固化涂层疏水性和硬度，制备了一种长碳链聚氨酯 -脲丙烯酸酯。【方法】首先通过丙烯酸羟乙酯与异佛尔酮二异氰酸酯反应制备中间体，再与生物基二聚二胺（ Priamine 1074和 Priamine1071）反应合成了聚氨酯 -脲丙烯酸酯（ PUUA-1074和 PUUA-1071）。使用傅立叶变换红外光谱仪和核磁共振波谱仪验证了产物结构。【结果】由此制备的生物基 PUUA涂层吸水率降至 1%以下，表现出优异的疏水性。 PUUA-1074展现了更优的综合性能，盐雾试验 600 h后涂层表面未出现点蚀或起泡现象。同时，得益于脲基的氢键增强作用， PUUA-1074固化膜兼具了良好的拉伸强度（ 40. 9 MPa）和表面硬度（铅笔硬度 F）。【结论】引入脲基能够改善长碳链改性光固化涂层的硬度。

［Objective］To integrate hydrophobicity and hardness of long carbon chain modified photocured coatings，a long carbon chain polyurethane-urea acrylate was prepared.［Methods］An intermediate was first prepared by reacting hydroxyethyl acrylate with isophorone diisocyanate，which was then further reacted with bio-based dimeric diamines（Priamine 1074 and Priamine1071） to synthesize polyurethane-urea acrylates（PUUA-1074 and PUUA-1071）. The product structure was confirmed by Fourier transform infrared spectroscopy and ¹H NMR.［Results］The prepared bio-based PUUA coatings exhibited water absorption below 1%，demonstrating excellent hydrophobicity，with no pitting or blistering observed on the PUUA-1074 coating surface after 600 h salt spray testing.Meanwhile，benefiting from the hydrogen bonding reinforcement provided by the urea groups，the PUUA-1074 cured film achieved both good tensile strength（40. 9 MPa）and surface hardness（pencil hardness F）.［Conclusion］ Introduction of urea groups couldimprove the hardness of long carbonchain-modified photocured coatings.