| 摘要 |
Photoactivatable compositions comprising a hexaarylbiimidazole and a heterocyclic compound of the formula Ar1-G-Ar2 where Ar1 is aryl of six to 12 nuclear carbons, Ar2 is Ar1 or arylene-G-Ar1 and G is a divalent furan, oxazole or oxadiazole ring, and optionally, a leuco dye and/or a polymerizable monomer or inert components such as binders, solvents, and the like. The compositions are photoactivated in the near ultraviolet or visible light wavelengths.
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