Other

Haruhiro Ikebe

Yoshishige Murata

Naoyuki Amaya

Keizo Anan

Takao Mogami

Yoshio Sano

Rumiko Seita

A transparent optical article is constituted of an optical resin. The optical resin in obtained by polymerizing a feed monomer containing at least a diester of unsaturated dicarboxylic acid selected from the group consisting of itaconic acid, citraconic acid and mesaconic acid. The ester group forming the diester is ##STR1## or R, wherein X represents a halogen atom, m represents zero or an integer of 1 to 5 and R represents an alkyl group having 1 to 12 carbon atoms, an alkenyl group having 1 to 12 carbon atoms or a cycloalkyl group having 3 to 12 carbon atoms. At least one of the ester groups has an aromatic ring defined above.

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Ibaraki-ken, Japan

Haruhiro Ikebe