Composition and stretched body

Patent metadata

Field	Value
Publication number	US-2022010118-A1
Application number	US-201917294871-A
Country	US
Kind code	A1
Filing date	Nov 19, 2019
Priority date	Nov 19, 2018
Publication date	Jan 13, 2022
Grant date	—

Abstract

A composition including a polytetrafluoroethylene and a polymer (I) containing a polymerization unit (I) based on a monomer represented by the following general formula (I), the composition having a standard specific gravity of 2.200 or less:
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, Cl, H, or CF 3 ; A 0 is an anionic group; X 2 is H, F, an alkyl group, or a fluorine-containing alkyl group; R is a linking group; Z 1 and Z 2 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

1 . A composition comprising:
a polytetrafluoroethylene; and a polymer (I) containing a polymerization unit (I) based on a monomer represented by the following general formula (I), the number average molecular weight of the polymer (I) being 0.3×10 4 or more, the composition being substantially free from a fluorine-containing surfactant, the composition having a standard specific gravity of 2.200 or less:)
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, Cl, H, or CF 3 ; A 0 is an anionic group; X 2 is H, F, an alkyl group, or a fluorine-containing alkyl group; R is a linking group; Z 1 and Z 2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more.

2 . The composition according to claim 1 , having a breaking strength of 10.0 N or more.

3 . The composition according to claim 1 , having a stress relaxation time of 50 seconds or more.

4 . The composition according to claim 1 , having an extrusion pressure of 10.0 MPa or more and 30.0 MPa or less.

5 . The composition according to claim 1 , wherein the polytetrafluoroethylene has an endothermic peak temperature in the range of 333 to 347° C.

6 . The composition according to claim 1 , wherein the anionic group is an anionic group that is a sulfate group, a carboxylate group, a phosphate group, a phosphonate group, a sulfonate group, or —C(CF 3 ) 2 OM 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.

7 . (canceled)

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

9 . A stretched body comprising the composition according to claim 1 .

10 . A stretched body comprising:
a polytetrafluoroethylene; and a polymer (I) containing a polymerization unit (I) based on a monomer represented by the following general formula (I), the number average molecular weight of the polymer (I) being 0.3×10 4 or more, the composition being substantially free from a fluorine-containing surfactant:
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, Cl, H, or CF 3 ; A 0 is an anionic group; X 2 is H, F, an alkyl group, or a fluorine-containing alkyl group; R is a linking group; Z 1 and Z 2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more.

11 . The stretched body according to claim 10 , having a breaking strength of 10.0 N or more.

12 . The stretched body according to claim 10 , having a stress relaxation time of 50 seconds or more.

13 . The stretched body according to claim 10 , having an endothermic peak temperature between 325 and 350° C.

14 . The stretched body according to claim 10 , wherein the anionic group is an anionic group that is a sulfate group, a carboxylate group, a phosphate group, a phosphonate group, a sulfonate group, or —C(CF 3 ) 2 OM 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.

15 . (canceled)

Assignees

• Daikin Ind Ltd

Inventors

• Nanba Yoshinori
• Ichikawa Kenji
• Fujimoto Yohei
• Yoshida Hirotoshi
• Sato Hiroyuki
• Kato Taketo
• Ito Kengo
• Yamanaka Taku

Classifications

• C08J2429/10

  Homopolymers or copolymers of unsaturated ethers (C08J2435/08 takes precedence) · CPC title

• C08J2327/18

  Homopolymers or copolymers of tetrafluoroethylene · CPC title

• C08J5/18

  Manufacture of films or sheets · CPC title

• C08F214/262

  with fluorinated vinyl ethers · CPC title

• C08L27/18 Primary

  Homopolymers or copolymers or tetrafluoroethene · CPC title