摘要： 【目的】改善因叔胺氢供体 /Norrish Ⅱ型光引发剂的引入导致涂料耐黄变性变差的情况。【方法】设计并合成了具有自迁移能力的叔胺氢供体，与二苯甲酮 /2-羟基 .2-甲基 .1-苯基 .1-丙酮形成引发体系配置了一系列光固化涂料，系统研究了其迁移性及对涂层聚合速率、固化程度、抗氧阻聚性及耐黄变性的影响。【结果】成功合成了具有自发迁移至涂层表面能力的含氟叔胺型氢供体；与添加 0. 5%（质量分数，下同）二乙胺的光固化涂料相比，添加 0. 1%迁移型叔胺氢供体的涂料在 70 μm处的双键转化率提升至 50%，涂层最终双键转化率提高了 10%，显著缓解了氧阻聚； 150 h紫外加速老化测试的涂层色差也由 11. 43降至 7. 10，叔胺氢供体用量的降低有效改善了涂层耐黄变性。【结论】迁移型氢供体通过其自发迁移能力，在低添加量下既能有效抑制涂层界面处的氧阻聚效应，也提升了涂层的耐黄变性。

关键词: 叔胺氢供体, 光固化, 光引发剂, 氧阻聚, 耐黄变性

Abstract: ［Objective］To improve the problem of reduced yellowing resistance of coatings causedby the introduction of tertiary amine hydrogen donors/Norrish type II photoinitiators.［Methods］A tertiary amine hydrogen donor with self-migratory capability was designed and synthesized. This donor， in combination with benzophenone and 2-hydroxy-2-methyl-1-phenyl-1-propanone，formed an initiation system，which was employed to prepare a series of UV-cured coatings. The migration ability， along with its effects on the polymerization rate，degree of cure，oxygen inhibition resistance and yellowing resistance of the coatings，was systematically investigated.［Results］A fluorine-containing tertiary amine hydrogen donor，capable of spontaneously migrating to the coating surface，was successfully synthesized. Compared with UV-cured coatings containing 0. 5% diethylamine，the coating with 0. 1% migratory tertiary amine hydrogen donor achieved a double bond conversion rate of50% at a depth of 70 μm and a 10% increase in final double bond conversion rate，significantly alleviating the oxygen inhibition. After 150 h of accelerated UV aging，the color difference of the coating decreased from 11. 43 to 7. 10. The reduction in the amount of tertiary amine hydrogen donoreffectively enhanced the yellowing resistance of the coating.［Conclusion］The migratory hydrogen donors，leveraging their inherent migration capabilities，could effectively suppress interfacial oxygeninhibition and concurrently enhance the yellowing resistance of coatings at low dosages.

Key words: tertiary amine hydrogen donors, UV-curing, photoinitiator, oxygen inhibition, yellowing resistance

中图分类号: 

• TQ637. 83