Method for manufacturing fluoropolymer

Patent metadata

Field	Value
Publication number	US-2025368814-A1
Application number	US-202519298164-A
Country	US
Kind code	A1
Filing date	Aug 12, 2025
Priority date	Mar 1, 2018
Publication date	Dec 4, 2025
Grant date	—

Abstract

Composition including a fluoropolymer; and a polymer (1) including a polymerized unit (1) derived from a monomer represented by formula (1) (CX2═CY(—CZ2—O—Rf-A)) where X is the same or different and is —H or —F; Y is —H, —F, an alkyl group, or a fluorine-containing alkyl group; Z is the same or different and is —H, —F, an alkyl group, or a fluoroalkyl group; Rf is a fluorine-containing alkylene group having 1 to 40 carbon atoms or a fluorine-containing alkylene group having 2 to 100 carbon atoms and having an ether bond; and A is —COOM, —SO3M, or —OSO3M, where M is —H, a metal atom, —NR74, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent, wherein R7 is H or an organic group, and at least one of X, Y, and Z contains a fluorine atom

First claim

1 . A composition comprising:
a fluoropolymer; and a polymer (1) comprising a polymerized unit (1) derived from a monomer represented by the following general formula (1):

wherein X is the same or different and is —H or —F; Y is —H, —F, an alkyl group, or a fluorine-containing alkyl group; Z is the same or different and is —H, —F, an alkyl group, or a fluoroalkyl group; Rf is a fluorine-containing alkylene group having 1 to 40 carbon atoms or a fluorine-containing alkylene group having 2 to 100 carbon atoms and having an ether bond; and A is —COOM, —SO 3 M, or —OSO 3 M, wherein M is —H, a metal atom, —NR 7 4 , imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent, wherein R 7 is H or an organic group, with the proviso that at least one of X, Y, and Z contains a fluorine atom.

2 . The composition according to claim 1 , wherein the polymerized unit (1) is a polymerized unit (1A) derived from a monomer represented by the following general formula (1A):

wherein Rf and A are as described above.

3 . The composition according to claim 1 , wherein a content of the polymer (1) is 0.0001% by mass or more and 20% by mass or less based on the fluoropolymer.

4 . The composition according to claim 1 , wherein the fluoropolymer is a polytetrafluoroethylene.

5 . The composition according to claim 4 , wherein the polyfluorotetraethylene is a modified polytetrafluoroethylene.

6 . The composition according to claim 4 , which is stretchable.

7 . The composition according to claim 4 , which has a breaking strength of 10.0 N or more.

8 . The composition according to claim 1 , which is substantially free from a fluorine-containing surfactant.

9 . The composition according to claim 1 , which is a powder.

Assignees

• Daikin Ind Ltd

Inventors

• Nanba Yoshinori
• Ichikawa Kenji
• Fujimoto Yohei
• Yoshida Hirotoshi
• Sato Hiroyuki
• Kato Taketo
• Ito Kengo
• Ishihara Sumi
• Higashi Masahiro
• Yoneda Satoru
• Aoyama Hirokazu
• Sukegawa Masamichi
• Kishikawa Yosuke
• Taira Takahiro
• Okui Chiaki
• Yamanaka Taku

Classifications

• C08L27/22

  modified by chemical after-treatment · CPC title

• C08L27/18 Primary

  Homopolymers or copolymers or tetrafluoroethene · CPC title

• C08F214/26

  Tetrafluoroethene · CPC title

• C08F114/26

  Tetrafluoroethene · CPC title

• C08F261/06

  on to polymers of unsaturated ethers · CPC title