PHOTO-INITIATEUR DE FLUORÈNE, SON PROCÉDÉ DE PRÉPARATION, COMPOSITION PHOTOPOLYMÉRISABLE LE COMPRENANT ET SON UTILISATION DANS LE DOMAINE DE LA PHOTOPOLYMÉRISATION

摘要

This invention provides a fluorene-based photoinitiator, a preparation method thereof, a photocurable composition having the same, and use thereof in the field of photocuring. This fluorene-based photoinitiator has a structure represented by formula (I), wherein X is -A-(X'), wherein A is selected from a heteroatom which is selected from O, N, or S, X' is selected from a C-Clinear or branched alkyl group, a C-Ccycloalkyl group, a C-Calkyl group substituted with a C-Ccycloalkyl group or one or more of carbon atoms in X' are substituted with a heteroatom, and n is 1 or 2; and Ris a hydroxy group or a N-morpholinyl group; or this fluorene-based photoinitiator comprises a structure represented by formula (II). The introduction of a new group to an existing structure of fluorene not only increases the molecular weight of the photoinitiator, but also improves related properties, such as initiation efficiency and the like, of the photoinitiator.