| abstract |
A fluorene photoinitiator, a method for producing the same, a photocurable composition having the same, and its use in the field of photocuring are provided. The fluorene photoinitiator has a structure represented by formula (I), wherein X is -A-(X') n ; A is selected from a hetero atom selected from O, N or S, and X′ is C substituted with C 1 -C 20 linear or branched alkyl, C 3 -C 8 cycloalkyl, and C 3 -C 8 cycloalkyl Selected from 1 -C 10 alkyl, or at least one of the carbon atoms in X is substituted with a hetero atom; n is 1 or 2; R 4 is hydroxy or N-morpholinyl; Alternatively, the fluorene photoinitiator includes a structure represented by formula (II). Introduction of a new group on the existing fluorene structure not only increases the molecular weight of the photoinitiator, but also improves related performance, such as the initiation efficiency of the photoinitiator. |