Composition and method for producing the same

Patent metadata

Field	Value
Publication number	US-12466905-B2
Application number	US-202217687325-A
Country	US
Kind code	B2
Filing date	Mar 4, 2022
Priority date	Sep 5, 2019
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

A composition containing a polytetrafluoroethylene, a polymer (I) containing a polymerization unit (I) based on a monomer represented by the general formula (I), a nonionic surfactant, and an aqueous medium, wherein a content of the polytetrafluoroethylene in the composition is 10% by mass or more based on the composition, and a content of the nonionic surfactant in the composition is 1.0% by mass or more based on the polytetrafluoroethylene,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.

First claim

What is claimed is:

1 . A composition comprising:
a polytetrafluoroethylene; a polymer (I) containing a polymerization unit (I) based on a monomer represented by the general formula (I); a nonionic surfactant; and an aqueous medium, wherein a content of the polytetrafluoroethylene in the composition is 10% by mass or more based on the composition, a content of the nonionic surfactant in the composition is 1.0% by mass or more based on the polytetrafluoroethylene, and a content of the polymerization unit (I) in the polymer (I) is 20 mol % or more based on all polymerization units,
CX 1 X 3 ═CX 2 R(—CZ 1 Z 2 -A 0 ) m   (I)

wherein X 1 and X 3 are each independently F, CI, H, or CF 3 ; X 2 is H, F, or CF 3 ; A 0 is an anionic group; R is a linking group; Z 1 and Z 2 are each independently F or CF 3 ; and m is 1.

2 . The composition according to claim 1 , wherein a stability retention time as measured by mechanical stability test of the composition is 1.0 minutes or more.

3 . The composition according to claim 1 , wherein a content of the polytetrafluoroethylene in the composition is 40% by mass or more based on the composition.

4 . The composition according to claim 1 , wherein the nonionic surfactant is represented by the general formula (i):
R 6 —O-A 1 -H  (i)
wherein R 6 is a linear or branched primary or secondary alkyl group having 8 to 18 carbon atoms, and A 1 is a polyoxyalkylene chain.

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

6 . The composition according to claim 1 , wherein the polymer (I) has a weight average molecular weight of 2.0×10 4 or more.

7 . The composition according to claim 1 , wherein the polymer (I) has a weight average molecular weight of 15.0×10 4 or more.

8 . The composition according to claim 1 , wherein the polymer (I) has an ion-exchange capacity of 1.75 meg/g or more.

9 . The composition according to claim 1 , wherein the polymer (I) has an ion-exchange capacity of 2.60 meg/g or more.

10 . The composition according to claim 1 , wherein the polymer (I) is water-soluble.

11 . The composition according to claim 1 , wherein A° in the general formula (I) is —SO 3 M, —COOM, or —P(O)(OM) 2 , 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, and R 7 is H or an organic group.

12 . The composition according to claim 1 , wherein the polytetrafluoroethylene is a modified polytetrafluoroethylene containing a tetrafluoroethylene unit and a modifying monomer unit.

13 . The composition according to claim 12 , wherein the modifying monomer is at least one selected from the group consisting of hexafluoropropylene, chlorotrifluoroethylene, vinylidene fluoride, fluoro (alkyl vinyl ether), (perfluoroalkyl) ethylene, ethylene, and a modifying monomer having a functional group capable of reacting by radical polymerization and a hydrophilic group.

Assignees

• Daikin Ind Ltd

Inventors

• Nanba Yoshinori
• Yamamoto Emi
• YAMABE Takuya
• Fujimoto Yohei
• Ichikawa Kenji
• Kato Taketo
• Yamanaka Taku
• Yoshida Hirotoshi

Classifications

• C09D127/18

  Homopolymers or copolymers of tetrafluoroethene · CPC title

• C08F14/26 Primary

  Tetrafluoroethene · CPC title

• C08L51/003

  grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds (C08L51/04, C08L51/06 take precedence) · CPC title

• C08F6/22

  Coagulation · CPC title

• C08F214/26

  Tetrafluoroethene · CPC title