| abstract |
The present invention provides a photoinitiator of formula (I), which is capable of being exposed to actinic radiation to initiate a free-radical polymerization readtion photoinitiator group containing an aromatic ring, and is connected with a Y through the aromatic ring; Y is CH2, CO, C(O) CH2O, C(O)CH2S and C(O)CH2CH2S, and the right end of group is connected with the PI; G is a residue of an acrylate or a polyol acrylate except a ethylenic bond; R is a C1-C12 alkyl, and a C1-C12 alkyl separated by O, S and NR'; R' is a C1-C12 alkyl and a phenyl; n=1-6 is an integer; m=1-6 is an integer and less than or equal n; p=0-4 is an integer and less than m. The present invention also provides a photocuring composition of the photoinitiator comprising formula (I), the photoinitiator of formula (I) is characterized as a low mobility. |