| abstract |
To provide a photopolymerizable composition which can be quickly cured by light of from 300 nm to 450 nm, and a cured product of which is less colored. A photopolymerization sensitizer composition containing a compound represented by the following formula (1) and a compound, of which the maximum value of an absorption coefficient in a wavelength region ranging from at least 400 nm to at most 500 nm is higher than the maximum value of an absorption coefficient in a wavelength region ranging from at least 400 nm to at most 500 nm of said compound; and a photopolymerizable composition containing the photopolymerization sensitizer composition. In the formula (1), R 1 is a C 1-20 alkyl group, a C 6-20 aryl group, a C 1-20 alkoxy group or a C 6-20 aryloxy group, and each of X 1 and Y 1 which may be the same or different, is a hydrogen atom or a C 1-8 alkyl group |