Sughrue Mion, PLLC
Cyclic olefin polymer containing little catalyst residue
A cyclic olefin polymer having a small content of a catalyst residue, a production process for the same and use of the same as an optical material. Catalysts used for polymerization and/or hydrogenation reaction for forming the cyclic olefin polymer are decomposed efficiently by adding at least one compound selected from the group consisting of an &agr;-oxyacid and &bgr;-oxyacid having one hydroxyl group and one carboxyl group in the molecule and derivatives obtained by substituting hydroxyl group thereof by an alkoxyl group, and the decomposition products are removed by rendering them insoluble in a reaction solvent used for the polymerization and/or hydrogenation reaction and precipitating them efficiently.
Teijin Limited
C C
C08F C08L
inventional additional
Hideaki Kiyonari Masaki Kaoru Michio
Nitta Hashidzume Takeuchi Iwata Yamaura