Kawasaki Kasei Chemicals Ltd.

Tatsuki Takeuchi

Shigeaki Numata

Akihiko Yamada

Shuji Yokoyama

To provide a photopolymerization sensitizer which will not cause problems of dusting or coloring of a cured product by bleeding of additives such as the photopolymerization sensitizer on the surface e.g. by blooming at the time of photo-curing or during storage of the cured product, and which imparts a practically sufficient photo-curing rate. An oligomer of a 9,10-bis(substituted oxy)anthracene compound having repeating units represented by the following formula (1): wherein n represents a repetition number and is from 2 to 50, each of X and Y which may be the same or different, is a hydrogen atom, a Calkyl group or a halogen atom, and A is a bivalent substituent.

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Kawasaki, Japan

Tatsuki Takeuchi