公开(公告)号：US20210403623A1

公开(公告)日：2021-12-30

申请号：US17470469

申请日：2021-09-09

Applicant: AGC Inc.

Inventor： Kosuke SHIBASAKI ,  Yukiko HATTORI ,  Shinya HIGUCHI ,  Junko ANZAI

IPC: C08F214/26

Abstract: To provide a method for producing a fluorinated polymer which does not require an emulsifier as an essential component while an aqueous medium with little environmental burden is used.
A method for producing a fluorinated polymer, which comprises polymerizing at least one fluorinated monomer selected from tetrafluoroethylene, chlorotrifluoroethylene and vinylidene fluoride, in an aqueous medium in the presence of a first polymer having units based on a compound represented by the following formula (1): CXY═CR1-L-R2  (1) wherein X and Y are each independently a hydrogen atom, a halogen atom or a methyl group, R1 is a hydrogen atom, a halogen atom or a C1-3 alkyl group, L is —CO—O—*, —O—CO—* or —O—, provided that * represents the binding position to R2, and R2 is a cyclic alkyl group, a monovalent aromatic hydrocarbon group or a C1-6 linear alkyl group, provided that the C1-6 linear alkyl group as R2 may have an etheric oxygen atom in a carbon-carbon bond, and the hydrogen atom in the cyclic alkyl group, the monovalent aromatic hydrocarbon group or the C1-6 linear alkyl group as R2 may be replaced with a halogen atom.