| abstract |
[PROBLEMS] To prevent an additive such as a photopolymerization sensitizer from exuding on the surface by blooming or the like during photocuring or during storage of a cured product, and causing no problem of powdering or coloring of the cured product. To provide a photopolymerization sensitizer that provides a sufficient photocuring rate. An oligomer of a 9,10-bis (substituted oxy) anthracene compound in which the repeating unit is represented by the formula (1). (N is an integer of 2 to 50; X and Y are each a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a halogen atom. A represents a divalent substituent.) [Selection figure] None |