| abstract |
(57) Abstract: A highly reactive photoinitiator for photopolymerization is provided. SOLUTION: The borate compound represented by the formula I or I'and a photopolymerizable composition containing the same. Embedded image [For example, R 1 and R 2 = aromatic hydrocarbon group in which at least one is substituted at the ortho position, R 9 R 10 R 11 Si- R 2a = divalent aromatic hydrocarbon group; R 3 = R 9 R 10 R 11 Si-substituted C 1-20 alkyl group, aromatic hydrocarbon group; R 4 = C 1-20 alkyl , C3~12 cycloalkyl, phenyl -C1~6 alkyl group; E = R 14 R 15 R 16 P, R 8 R 8a R 7 N (R 7, R 8 , R 8a , R 9 to R 11 = C 1 to 12 alkyl group; R 14 to R 16 = phenyl group; G = group capable of forming a cation (provided that when R 1 to R 3 are 2,4,6-trimethylphenyl group, R 4 is not a C2-20 alkyl group or C2-8 alkenyl). ]. |