US 2025/0084191 A1 · FLUORINE RESIN REFINING METHOD, METHOD FOR PRODUCING REFINED FLUORINE RESIN, FLUORINE RESIN, OPTICAL MATERIAL, ELECTRONIC MATERIAL AND PLASTIC OPTICAL FIBER

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.

Claims17

Dependent claims

A fluorine resin refining method, comprising bringing a fluorine resin into contact with a fluorinating agent for refining at a temperature of (Tg1−35)° C. or higher, where the fluorine resin comprises a first fluorine-containing aliphatic ring structure in a molecular chain and Tg1 is a glass transition temperature of the fluorine resin.

A fluorine resin having a structural unit comprising a first fluorine-containing aliphatic ring structure having a dioxolane skeleton,

the fluorine resin having a chemical structure comprising a second fluorine-containing aliphatic ring structure having a dioxolane skeleton at a terminal of a molecular chain of the fluorine resin, wherein
a terminal group is bonded to a carbon atom at a 2-position of the dioxolane skeleton of the chemical structure, and
IF/IH as a ratio of IF to IH is 7 or more in a mass spectrum of the fluorine resin evaluated by gas chromatography mass spectrometry (GC-MS), where the IH represents an area of a peak derived from the terminal group comprising a hydrogen atom and the IF represents an area of a peak derived from the terminal group comprising a fluorine atom.

Dependencies are inferred from the claim text.

Fluorine resin refining method, method for producing refined fluorine resin, fluorine resin, optical material, electronic material and plastic optical fiber

Life of this patent

Fluorine resin refining method, method for producing refined fluorine resin, fluorine resin, optical material, electronic material and plastic optical fiber

Life of this patent

Abstract

Claims17