| 摘要 |
A photocurable composition is curable by exposure to visible light, and comprises a free-radical polymerizable compound and a photoinitiating system, the photoinitiating system comprising a) a dye which is excitable by visible light and has a triplet energy form150 kJ/ mol to250 kJ/mol,such as Eosin Yellow and Fluorescein, and b) an α- halogen carbonyl compound. Preferably, the composition comprises a compound with a C-H-acidic hydrogen atom adjacent to at least one carbonyl group. The composition is cured by visible light in an oxygen-containing atmosphere and results in tack-free, colorless coatings. |
