采用联苯型双马来酰亚胺和糠醇合成了含 Diels-Alder（DA）结构的联苯型二元醇，然后利用该二元醇与异佛尔酮二异氰酸酯、聚四氢呋喃及丙烯酸羟乙酯为原料制备了光固化自修复聚氨酯树脂，利用 FT-IR和 ¹H NMR对产物结构进行了表征，并测定了树脂光固化过程中的双键转化率，研究了 DA二元醇用量对涂层性能的影响。结果表明：DA含量越大，涂层微相分离越明显，自消光效果越好，且涂层的自修复效果越显著，涂层修复后表面粗糙程度增大，光泽下降，涂层在修复 3~4次后光泽趋于稳定。此外，随着 DA含量的增加，涂层的玻璃化转变温度（T_g）增大，且出现了 2个 T_g。当聚四氢呋喃与 DA二元醇物质的量比为 0. 75∶1. 25时，涂层兼具良好的自消光和自修复性能，损伤涂层经 150 ℃修复后，划痕基本修复，光泽由初始光泽 18. 6下降至 9. 8，经 3~4次修复后光泽稳定在 4. 5左右。

A biphenyl diol containing a Diels-Alder（DA）structure was synthesized byreacting biphenyl bismaleimide with furfuryl alcohol. Subsequently， a UV-curable selfrepairing polyurethane resin was prepared by using this diol，isophorone diisocyanate，poly（tetrahydrofuran），and hydroxyethyl acrylate. The structure of resin was characterized by using FT-IR and ¹H NMR. The double-bond conversion rate during the UV-curable process of theresin was determined via FT-IR analysis. The impact of the DA diol dosage on the coatingproperties was investigated. The results indicated that an increase in DA content led to morepronounced microphase separation in the coating，enhancing the self-matting effect and the self-healing properties of the coating. After healed，the surface roughness of the coatingincreased，accompanied by a decrease in gloss，The gloss of the coating was stable after 3 to 4 repairs. Moreover，an increase in DA content resulted in a higher glass transition temperaturefor the cured material，with the appearance of two distinct glass transition temperatures. Whenthe material amount ratio of polytetrahydrofuran and DA diol was 0. 75∶1. 25，the coatingexhibited excellent self-matte performance and self-repairing properties. When subjected todamage at 150 ℃，the coating was able to repair scratches effectively，with the gloss decreasingfrom the initial 18. 6 to 9. 8. After undergoing 3 to 4 rounds of repair，the gloss stabilizes at around 4. 5.