Daikin Industries, Ltd.

Souta Yuasa

Masahiro Higashi

Soushi Tsuchiya

Yosuke Kishikawa

Taku Yamanaka

Taketo Kato

Kenji Ichikawa

Masaki Irie

Yohei Fujimoto

The present disclosure provides a method for producing a fluoropolymer, the method includes polymerizing a fluoromonomer in an aqueous medium in the presence of a polymer (1) to obtain a fluoropolymer, wherein the polymer (1) is a polymer of a monomer (1) represented by the general formula (1) below, in which the content of a dimer and a trimer of the monomer (1) is 1.0% by mass or less based on the polymer (1):CF═CF—R—CZZ-A  (1)wherein R is a linking group; Zand Zare each independently F or CF; and Ais an anionic group.

Method for producing fluoropolymer, method for producing polytetrafluoroethylene, method for producing perfluoroelastomer, and composition

A method for producing a fluoropolymer, which includes: polymerizing a monomer (I) represented by the general formula (I) below in an aqueous medium substantially in the absence of a fluorine-containing surfactant (except for the monomer (I) represented by the general formula (I)) to obtain a crude composition containing a polymer of the monomer (I); removing a dimer and a trimer of the monomer (I) contained in the crude composition from the crude composition to obtain a polymer (I) in which the content of the dimer and trimer of the monomer (I) is 1.0% by mass or less based on the polymer (I); and polymerizing a fluoromonomer in an aqueous medium in the presence of the polymer (I) to obtain a fluoropolymer:CXX═CXR(—CZZ-A)  (I)wherein Xand X, X, A, R, Zand Zare as defined herein.

Method for producing fluoropolymer

Growing community of inventors

Osaka, Japan

Souta Yuasa