Title:
フルオロポリマーの製造方法
Document Type and Number:
Japanese Patent JP7360058
Kind Code:
B2
Abstract:
The present disclosure provides a method for producing a fluoropolymer, the method comprising: 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: CX1X3=CX2R(-CZ1Z2-A0)m (I)wherein X1 and X3 are each independently F, Cl, H, or CF3; X2 is H, F, an alkyl group, or a fluorine-containing alkyl group; A0 is an anionic group; R is a linking group; Z1 and Z2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more.
Inventors:
Taku Yamanaka
Masahiro Higashi
Takehito Kato
Kenji Ichikawa
Yohei Fujimoto
Masaki Irie
Soji Tsuchiya
Sota Yuasa
Masahiro Higashi
Takehito Kato
Kenji Ichikawa
Yohei Fujimoto
Masaki Irie
Soji Tsuchiya
Sota Yuasa
Application Number:
JP2021558461A
Publication Date:
October 12, 2023
Filing Date:
November 19, 2020
Export Citation:
Assignee:
Daikin Industries, Ltd.
International Classes:
C08F2/44; C08F2/16; C08F14/18
Domestic Patent References:
| JP2009102490A | ||||
| JP2009029854A | ||||
| JP2008545873A |
Foreign References:
| WO2019168183A1 |
Attorney, Agent or Firm:
Patent Attorney Corporation Tokoshie Patent Office