Asahi Glass Company, Limited

Yasuo Etoh

Norihide Sugiyama

Naoko Shirota

Kazuyoshi Kurashima

Yoshiteru Sumi

Kumiko Minezaki

Daisuke Ninomiya

The present invention provides a continuous resin recovery method for recovering resin from which foreign matters and volatile components are sufficiently removed and which is highly purified and suitable for optical use. The continuous resin recovery method comprises heating a resin solution in a heating pipe at a temperature at least the boiling point of the solvent, introducing the resin solution heated at a temperature at least the boiling point of the solvent into a rough drying chamber maintained at a reduced pressure, separating the resin from the solvent vapor in the rough drying chamber, melting the separated resin, introducing the molten resin in a precise drying chamber kept at a reduced pressure, and passing the molten resin through a perforated plate in the precise drying chamber.

Continuous resin recovery apparatus and recovery method

A method for producing a fluorinated alicyclic structure-containing polymer, which comprises contacting a fluorinated alicyclic structure-containing polymer having an unstable terminal group derived from a polymerization initiator and/or a chain transfer agent with fluorine gas in a fluorine-containing solvent, to convert the unstable terminal group to a stable terminal group and thereby to obtain a fluorinated alicyclic structure-containing polymer having substantially no unstable terminal group.

Method for producing a fluorinated alicyclic structure-containing polymer

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Chiyoda-ku, Japan

Yasuo Etoh