Patent US4298697A successfully refreshed from Google Patents.
US4298697A
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Method of making sheet or shaped cation exchange membrane
Assignee: Diamond Shamrock Chemicals Co
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Filing: 1979-10-23
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Granted: 1981-11-03
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Expires: 1999-10-23
Abstract
Abstract Normally solid copolymers of a fluorinated vinyl monomer and a perfluorinated vinyl compound having a carboxyl and/or sulfonyl group attached directly to the perfluorinated vinyl group or indirectly through an alkyl or ether linkage have been found to be soluble in low molecular weight polymers of perhalogenated alkyl ethers, low molecular weight polymers of perhalogenated alkyls and perfluoro kerosenes, each of said solvent materials having boiling points between about 200° C. and 350° C. The copolymeric material dissolved in accordance with the instant invention can readily be resolidified by solvent removal and hydrolyzed or converted to the salt form to become a cation exchange material having an equivalent weight in the range of 1000 to 1600.
Inventors
- 👤 Stanley K. Baczek
- 👤 G. Howard McCain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:56
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/11; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2231; C08J5/2237; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/426; H01M50/44; H01M50/489; H01M50/497; C08J2327/00; C08J2327/02; C08J2327/12; H01M2300/00; H01M2300/0002; H01M2300/0014; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
148 words
A method of forming shaped polymeric material polymerized from at least two monomers, one said monomer consisting essentially of at least one fluorinated vinyl compound and said other monomer consisting essentially of at least one monomer of the structure ##STR3## wherein R f is a bifunctional perfluorinated radical containing from two to eight carbon atoms, which carbon atoms may be interrupted by one or more oxygen atoms and X is selected from the group consisting of sulfonyl fluoride, carbonyl fluoride, sulfonate ester, and carboxylate ester, comprising: dissolving said polymeric material in at least one solvent selected from the group consisting of low molecular weight polymers of perhalogenated alkylethers, low molecular weight polymers of perhalogenated alkyls and perfluorokerosenes, each having boiling points between about 200° C. and 350° C.; shaping said dissolved polymeric material; and thereafter stripping said solvent therefrom to resolidify said polymeric material in the shaped form.
Claim 2
Independent Claim
148 words
A method of forming shaped polymeric material polymerized from at least two monomers, one said monomer consisting essentially of at least one fluorinated vinyl compound and said other monomer consisting essentially of at least one monomer of the structure ##STR3## wherein R f is a bifunctional perfluorinated radical containing from two to eight carbon atoms, which carbon atoms may be interrupted by one or more oxygen atoms and X is selected from the group consisting of sulfonyl fluoride, carbonyl fluoride, sulfonate ester, and carboxylate ester, comprising: dissolving said polymeric material in at least one solvent selected from the group consisting of low molecular weight polymers of perhalogenated alkylethers, low molecular weight polymers of perhalogenated alkyls and perfluorokerosenes, each having boiling points between about 200° C. and 350° C.; shaping said dissolved polymeric material; and thereafter stripping said solvent therefrom to resolidify said polymeric material in the shaped form.
Claim 3
Dependent Claim
32 words
The method as stated in claim 1 wherein said other monomer is CF 2 ══CFOCF 2 CF(CF 3 )O(CF 2 ) 2 SO 2 Y and Y is fluorine or lower alkoxy.
Claim 4
Dependent Claim
30 words
The method as stated in claim 1 wherein said other monomer is CF 2 ══CFOCF 2 CF(CF 3 )O(CF 2 ) 2 CO 2 R and R is lower alkyl.
Claim 5
Dependent Claim
28 words
The method as stated in claim 1 wherein said other monomer is CF 2 ══CFOCF 2 CF(CF 3 )OCF 2 CO 2 R and R is lower alkyl.
Claim 6
Independent Claim
18 words
The method as stated in claims 1, 2, 3, or 4 wherein said fluorinated vinyl compound is tetrafluoroethylene.
Claim 7
Independent Claim
139 words
A method of forming shaped polymeric material polymerized from at least two monomers, one said monomer consisting essentially of at least one fluorinated vinyl compound and said other monomer consisting essentially of at least one monomer of the structure ##STR4## wherein R f is a bifunctional perfluorinated radical containing from 2 to 8 carbon atoms, which carbon atoms may be interrupted by one or more oxygen atoms and X is selected from the group consisting of sulfonyl fluoride, carbonyl fluoride, sulfonate ester, and carboxylate ester, comprising: dissolving said polymeric material in at least one solvent selected from the group consisting of oligomers and telomers of --(CF 2 --CFCl) n --, wherein n is an integer from 5 to 15; shaping said dissolved polymeric material; and thereafter stripping said solvent therefrom to resolidify said polymeric material in the shaped form.
Claim 8
Independent Claim
139 words
A method of forming shaped polymeric material polymerized from at least two monomers, one said monomer consisting essentially of at least one fluorinated vinyl compound and said other monomer consisting essentially of at least one monomer of the structure ##STR4## wherein R f is a bifunctional perfluorinated radical containing from 2 to 8 carbon atoms, which carbon atoms may be interrupted by one or more oxygen atoms and X is selected from the group consisting of sulfonyl fluoride, carbonyl fluoride, sulfonate ester, and carboxylate ester, comprising: dissolving said polymeric material in at least one solvent selected from the group consisting of oligomers and telomers of --(CF 2 --CFCl) n --, wherein n is an integer from 5 to 15; shaping said dissolved polymeric material; and thereafter stripping said solvent therefrom to resolidify said polymeric material in the shaped form.
Claim 9
Dependent Claim
32 words
The method as stated in claim 6 wherein said other monomer is CF 2 ══CFOCF 2 CF(CF 3 )O(CF 2 ) 2 SO 2 Y and Y is fluoride or lower alkoxy.
Claim 10
Dependent Claim
30 words
The method as stated in claim 6 wherein said other monomer is CF 2 ══CFOCF 2 CF(CF 3 )O(CF 2 ) 2 CO 2 R and R is lower alkyl.
Claim 11
Dependent Claim
28 words
The method as stated in claim 6 wherein said other monomer is CF 2 ══CFOCF 2 CF(CF 3 )OCF 2 CO 2 R and R is lower alkyl.
Claim 12
Independent Claim
18 words
The method as stated in claims 6, 7, 8, or 9 wherein said fluorinated vinyl compound is tetrafluoroethylene.
Claim 13
Independent Claim
124 words
A method of forming shaped polymeric material polymerized from at least two monomers, one said monomer consisting esstentially of at least one fluorinated vinyl compound and said other monomer consisting essentially of at least one monomer of the structure ##STR5## wherein R f is a bifunctional perfluorinated radical containing from 2 to 8 carbon atoms, which carbon atoms may be interrupted by one or more oxygen atoms and X is selected from the group consisting of sulfonyl fluoride, carbonyl fluoride, sulfonate ester, and carboxylate ester, comprising: dissolving said polymeric material in a solvent consisting of perfluorokerosenes having boiling points between about 200° and 350°; shaping said dissolved polymeric material; and thereafter stripping said solvent therefrom to resolidify said polymeric material in the shaped form.
Claim 14
Independent Claim
124 words
A method of forming shaped polymeric material polymerized from at least two monomers, one said monomer consisting esstentially of at least one fluorinated vinyl compound and said other monomer consisting essentially of at least one monomer of the structure ##STR5## wherein R f is a bifunctional perfluorinated radical containing from 2 to 8 carbon atoms, which carbon atoms may be interrupted by one or more oxygen atoms and X is selected from the group consisting of sulfonyl fluoride, carbonyl fluoride, sulfonate ester, and carboxylate ester, comprising: dissolving said polymeric material in a solvent consisting of perfluorokerosenes having boiling points between about 200° and 350°; shaping said dissolved polymeric material; and thereafter stripping said solvent therefrom to resolidify said polymeric material in the shaped form.
Claim 15
Dependent Claim
32 words
The method as stated in claim 11 wherein said other monomer is CF 2 ══CFOCF 2 CF(CF 3 )O(CF 2 ) 2 SO 2 Y and Y is fluoride or lower alkoxy.
Claim 16
Dependent Claim
30 words
The method as stated in claim 11 wherein said other monomer is CF 2 ══CFOCF 2 CF(CF 3 )O(CF 2 ) 2 CO 2 R and R is lower alkyl.
Claim 17
Dependent Claim
28 words
The method as stated in claim 11 wherein said other monomer is CF 2 ══CFOCF 2 CF(CF 3 )OCF 2 CO 2 R and R is lower alkyl.
Claim 18
Independent Claim
18 words
The method as stated in claims 11, 12, 13, or 14 wherein said fluorinated vinyl compound is tetrafluoroethylene.
Claim 19
Independent Claim
154 words
A method of forming shaped cation exchange resin comprising: dissolving a polymeric material polymerized from at least two monomers, one said monomer consisting essentially of at least one fluorinated vinyl compound and said other monomer consisting essentially of at least one monomer of the structure ##STR6## wherein R f is a bifunctional perfluorinated radical containing from 2 to 8 carbon atoms, which carbon atoms may be interrupted by one or more oxygen atoms and X is selected from the group consisting of sulfonyl fluoride, carbonyl fluoride, sulfonate ester, and carboxylate ester, in at least one solvent selected from the group consisting of low molecular weight polymers of perhalogenated alkylethers, low molecular weight polymers of perhalogenated alkyls and perfluorokerosenes, each having boiling points between about 200° C. and 350° C.; shaping said disssolved polymeric material; stripping said solvent therefrom to resolidify said polymeric material in the shaped form; and thereafter hydrolyzing said resolidified polymeric material.
Claim 20
Independent Claim
154 words
A method of forming shaped cation exchange resin comprising: dissolving a polymeric material polymerized from at least two monomers, one said monomer consisting essentially of at least one fluorinated vinyl compound and said other monomer consisting essentially of at least one monomer of the structure ##STR6## wherein R f is a bifunctional perfluorinated radical containing from 2 to 8 carbon atoms, which carbon atoms may be interrupted by one or more oxygen atoms and X is selected from the group consisting of sulfonyl fluoride, carbonyl fluoride, sulfonate ester, and carboxylate ester, in at least one solvent selected from the group consisting of low molecular weight polymers of perhalogenated alkylethers, low molecular weight polymers of perhalogenated alkyls and perfluorokerosenes, each having boiling points between about 200° C. and 350° C.; shaping said disssolved polymeric material; stripping said solvent therefrom to resolidify said polymeric material in the shaped form; and thereafter hydrolyzing said resolidified polymeric material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |