公开(公告)号：US20250084191A1

公开(公告)日：2025-03-13

申请号：US18726943

申请日：2023-01-10

Applicant: NITTO DENKO CORPORATION

Inventor： Yoshihide KAWAGUCHI ,  Takashi SHIMIZU ,  Takeshi SAITO ,  Akifumi KIDO

IPC: C08F8/00 ,  C08F24/00 ,  G02B6/02

Abstract: One aspect of the present invention is a fluorine resin refining method. The method includes refining a fluorine resin by bringing the fluorine resin into contact with a fluorinating agent at a temperature of (Tg1−35)° C. or higher, where Tg1 is the glass transition temperature of the fluorine resin, and the fluorine resin includes a first fluorine-containing aliphatic ring structure in a molecular chain. The present invention makes it possible to produce a fluorine resin suitable for use in a plastic optical fiber. The first fluorine-containing aliphatic ring structure may have a dioxolane skeleton.