US4940525A
Expired / Lapsed
US
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Low equivalent weight sulfonic fluoropolymers
Assignee: Dow Chemical Co
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Filing: 1987-05-08
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Granted: 1990-07-10
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Expires: 2007-05-08
Abstract
Abstract The invention is a sulfonic fluoropolymer having a fluoropolymer backbone having pendant groups attached thereto and represented by the general formula: ZSO.sub.2 --(CF.sub.2).sub.a --(CFR.sub.f).sub.b --O-- where: Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is not equal to 0; R f is selected from the group consisting of --F, --Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight of less than about 725, and a hydration product of less than about 22,000. The invention also includes sulfonic fluoropolymers having a fluoropolymer backbone and having pendant groups attached thereto represented by the general formula: ZSO.sub.2 --(CF.sub.2).sub.a --(CFR.sub.f)b--O-- where Z, a, b and R f are defined above, provided however, that a+b is equal to 1 or 2, and wherein the sulfonic fluoropolymer has an equivalent weight less than about 725.
Inventors
- 👤 Bobby R. Ezzell
- 👤 William P. Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:33
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; B32B27/06; B32B27/08; B32B27/28; B32B27/286; B32B27/322; C; C08; C08F; C08F214/00; C08F214/18; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31551; Y10T428/31573; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
123 words
A sulfonic fluoropolymer having a fluoropolymer backbone having pendant groups attached thereto and represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where: Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is not equal to 0; R f is selected from the group consisting of -F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight of less than about 700, and a hydration product of less than about 22,000, when Z is hydrogen.
Claim 2
Dependent Claim
123 words
A sulfonic fluoropolymer having a fluoropolymer backbone having pendant groups attached thereto and represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where: Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is not equal to 0; R f is selected from the group consisting of -F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight of less than about 700, and a hydration product of less than about 22,000, when Z is hydrogen.
Claim 3
Dependent Claim
17 words
An electrolytic cell having an anode and a cathode separated by the fluoropolymer film of claim 1.
Claim 4
Dependent Claim
123 words
A sulfonic fluoropolymer having a fluoropolymer backbone having pendant groups attached thereto and represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where: Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is not equal to 0; R f is selected from the group consisting of -F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight of less than about 675, and a hydration product of less than about 22,000 when Z is hydrogen.
Claim 5
Dependent Claim
123 words
A sulfonic fluoropolymer having a fluoropolymer backbone having pendant groups attached thereto and represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where: Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is not equal to 0; R f is selected from the group consisting of -F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight of less than about 675, and a hydration product of less than about 22,000 when Z is hydrogen.
Claim 6
Dependent Claim
123 words
A sulfonic fluoropolymer having a fluoropolymer backbone having pendant groups attached thereto and represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where: Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is not equal to 0; R f is selected from the group consisting of -F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight of less than about 650, and a hydration product of less than about 22,000, when Z is hydrogen.
Claim 7
Dependent Claim
123 words
A sulfonic fluoropolymer having a fluoropolymer backbone having pendant groups attached thereto and represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where: Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is not equal to 0; R f is selected from the group consisting of -F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight of less than about 650, and a hydration product of less than about 22,000, when Z is hydrogen.
Claim 8
Dependent Claim
110 words
A sulfonic fluoropolymer having a fluoropolymer backbone and having pendant groups attached thereto represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is equal to 1 or 2; R f is selected from the group consisting of --F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight less than about 725.
Claim 9
Dependent Claim
110 words
A sulfonic fluoropolymer having a fluoropolymer backbone and having pendant groups attached thereto represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is equal to 1 or 2; R f is selected from the group consisting of --F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight less than about 725.
Claim 10
Dependent Claim
110 words
A sulfonic fluoropolymer having a fluoropolymer backbone and having pendant groups attached thereto represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is equal to 1 or 2; R f is selected from the group consisting of --F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight less than about 700.
Claim 11
Dependent Claim
110 words
A sulfonic fluoropolymer having a fluoropolymer backbone and having pendant groups attached thereto represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is equal to 1 or 2; R f is selected from the group consisting of --F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight less than about 700.
Claim 12
Dependent Claim
110 words
A sulfonic fluoropolymer having a fluoropolymer backbone and having pendant groups attached thereto represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is equal to 1 or 2; R f is selected from the group consisting of --F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight less than about 675.
Claim 13
Dependent Claim
110 words
A sulfonic fluoropolymer having a fluoropolymer backbone and having pendant groups attached thereto represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is equal to 1 or 2; R f is selected from the group consisting of --F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight less than about 675.
Claim 14
Dependent Claim
110 words
A sulfonic fluoropolymer having a fluoropolymer backbone and having pendant groups attached thereto represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is equal to 1 or 2; R f is selected from the group consisting of --F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight less than about 650.
Claim 15
Dependent Claim
110 words
A sulfonic fluoropolymer having a fluoropolymer backbone and having pendant groups attached thereto represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is equal to 1 or 2; R f is selected from the group consisting of --F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight less than about 650.
Claim 16
Dependent Claim
110 words
A sulfonic fluoropolymer having a fluoropolymer backbone and having pendant groups attached thereto represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is equal to 1 or 2; R f is selected from the group consisting of --F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight less than about 600.
Claim 17
Dependent Claim
110 words
A sulfonic fluoropolymer having a fluoropolymer backbone and having pendant groups attached thereto represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is equal to 1 or 2; R f is selected from the group consisting of --F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight less than about 600.
Claim 18
Dependent Claim
109 words
A sulfonic fluoropolymer having a fluoropolymer backbone and having pendant groups attached thereto represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2;b is 0-2; provided a+b is equal to 1 or 2; R f is selected from the group consisting of --F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight less than about 575.
Claim 19
Dependent Claim
109 words
A sulfonic fluoropolymer having a fluoropolymer backbone and having pendant groups attached thereto represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2;b is 0-2; provided a+b is equal to 1 or 2; R f is selected from the group consisting of --F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight less than about 575.
Claim 20
Dependent Claim
146 words
A laminated composite film comprising a fluoropolymer film having sulfonic or carboxylic ion exchange active groups in one layer and, as the other layer, a sulfonic fluoropolymer having a fluoropolymer backbone having pendant groups attached thereto and represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where: Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is not equal to 0; Rf is selected from the group consisting of --F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight of less than about 700, and a hydration product of less than about 22,000, when Z is hydrogen.
Claim 21
Dependent Claim
146 words
A laminated composite film comprising a fluoropolymer film having sulfonic or carboxylic ion exchange active groups in one layer and, as the other layer, a sulfonic fluoropolymer having a fluoropolymer backbone having pendant groups attached thereto and represented by the general formula: ZSO.sub.2 -(CF.sub.2).sub.a -(CFR.sub.f).sub.b -O- where: Z is a halogen, an alkali metal, hydrogen, or OR; R is a branched or linear alkyl radical having from 1 to about 10 carbon atoms or an aryl radical; a is 0-2; b is 0-2; provided a+b is not equal to 0; Rf is selected from the group consisting of --F,--Cl, perfluoroalkyl radicals having from 1 to about 10 carbon atoms and fluorochloroalkyl radicals having from 1 to about 10 carbon atoms, wherein the sulfonic fluoropolymer has an equivalent weight of less than about 700, and a hydration product of less than about 22,000, when Z is hydrogen.
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