Patent US4974486A successfully refreshed from Google Patents.
Patent US2159739A successfully refreshed from Google Patents.
Patent US4126588A successfully refreshed from Google Patents.
US4126588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated cation exchange membrane and use thereof in electrolysis of alkali metal halide
Assignee: AGC Inc
•
Filing: 1976-12-28
•
Granted: 1978-11-21
•
Expires: 1996-12-28
Abstract
Abstract A fluorinated cation exchange membrane is made of three component copolymer produced by copolymerizing a fluorovinylpolyether having the formula I cf.sub.2 ═ cf--o-cf.sub.2 --(cfxocf.sub.2).sub.α --(cfx').sub.β --(cf 2 ocfx").sub.γ --a wherein α is 0 to 3; β is 0 to 6; γ is 0 to 4 and either α or γ is not 0; X, X' and X" respectively represent --F or a C 1-5 perfluoroalkyl group; A represents --CN--, --COF, --COOH, --COOR 1 , --COOM or --CONR 2 R 3 ; R 1 represents a C 1-10 alkyl group preferably a C 1-3 alkyl group, R 2 and R 3 respectively represents hydrogen atom or a C 1-10 alkyl group; and M represents an alkali metal atom or a quaternary ammonium group, a fluorovinyl compound having the formula II cf.sub.2 ═ cf--(o).sub.δ --(cfy).sub.γ --a' wherein δ is 0 to 1; γ is 1 to 6; Y represents --F or a C 1-5 perfluoroalkyl group; A is defined in the formula I and a fluorinated olefin having the formula III cf.sub.2 ═ czz' wherein Z and Z' respectively represent --H, --Cl, --F or --CF 3 , and if necessary hydrolyzing the copolymer.
Inventors
- 👤 Hiroshi Ukihashi
- 👤 Tatsuro Asawa
- 👤 Masaaki Yamabe
- 👤 Tomoki Gunjima
- 👤 Haruhisa Miyake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:25
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2231; C08J5/2237; B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/19; B01J47/00; B01J47/12; C08F; C08F8/00; C08F8/12; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B1/46; C25B13/00; C25B13/04; C25B13/08; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
229 words
A fluorinated cation exchange membrane which is made of a three component copolymer produced by copolymerizing a fluorovinylpolyether having the formula I cf.sub.2 ═cf--o--cf.sub.2 --(cfxocf.sub.2).sub.α --(cfx').sub.β --(cf.sub.2 ocfx").sub.γ --a wherein α is 0 to 3; β is 0 to 6; γ is 0 to 4 and either α or γ is not 0; X, X' and X" respectively represent --F or a C 1-5 perfluoroalkyl group; A represents --CN--, --COF, --COOH, --COOR 1 , --COOM or --CONR 2 R 3 ; R 1 represents a C 1-10 alkyl group preferably a C 1-3 alkyl group; R 2 and R 3 respectively represents hydrogen atom or a C 1-10 alkyl group; and M represents an alkali metal atom or a quaternary ammonium group, a fluorovinyl compound having the formula II cf.sub.2 ═cf--(o).sub.δ --(cfy).sub.γ --a' wherein δ is 0 to 1; γ is 1 to 6; Y represents --F or a C 1-5 perfluoroalkyl group; A' repesents --CN--, --COF, --COOH, --COOR 1 , --COOM or --CONR 2 R 3 ; and a fluorinated olefin having the formula III cf.sub.2 ═czz' wherein Z and Z' respectively represent --H, --Cl, --F or --CF 3 , and if necessary hydrolyzing the copolymer wherein said copolymer comprises 1 to 30 mole % fluorovinylpolyether (I) and fluorovinyl compound (II) and wherein the molar ratio of fluorovinylpolyether (I) to fluorovinyl compound (II) is from 0.1 to 5.0.
Claim 2
Dependent Claim
229 words
A fluorinated cation exchange membrane which is made of a three component copolymer produced by copolymerizing a fluorovinylpolyether having the formula I cf.sub.2 ═cf--o--cf.sub.2 --(cfxocf.sub.2).sub.α --(cfx').sub.β --(cf.sub.2 ocfx").sub.γ --a wherein α is 0 to 3; β is 0 to 6; γ is 0 to 4 and either α or γ is not 0; X, X' and X" respectively represent --F or a C 1-5 perfluoroalkyl group; A represents --CN--, --COF, --COOH, --COOR 1 , --COOM or --CONR 2 R 3 ; R 1 represents a C 1-10 alkyl group preferably a C 1-3 alkyl group; R 2 and R 3 respectively represents hydrogen atom or a C 1-10 alkyl group; and M represents an alkali metal atom or a quaternary ammonium group, a fluorovinyl compound having the formula II cf.sub.2 ═cf--(o).sub.δ --(cfy).sub.γ --a' wherein δ is 0 to 1; γ is 1 to 6; Y represents --F or a C 1-5 perfluoroalkyl group; A' repesents --CN--, --COF, --COOH, --COOR 1 , --COOM or --CONR 2 R 3 ; and a fluorinated olefin having the formula III cf.sub.2 ═czz' wherein Z and Z' respectively represent --H, --Cl, --F or --CF 3 , and if necessary hydrolyzing the copolymer wherein said copolymer comprises 1 to 30 mole % fluorovinylpolyether (I) and fluorovinyl compound (II) and wherein the molar ratio of fluorovinylpolyether (I) to fluorovinyl compound (II) is from 0.1 to 5.0.
Claim 3
Dependent Claim
50 words
A fluorinated cation exchange membrane according to claim 1, wherein the copolymer comprises 5 to 25 mole % of a total of the components of the fluorovinylpolyether (I) and the fluorovinyl compound (II) at 0.2 to 2.0 of a molar ratio of the fluorovinylpolyether (I) to the fluorovinyl compound (II).
Claim 4
Dependent Claim
28 words
A fluorinated cation exchange membrane according to claim 1 wherein an ion exchange capacity of the membrane is in a range of 0.9 to 2.0 meq/g dry polymer.
Claim 5
Dependent Claim
35 words
A fluorinated cation exchange membrane according to claim 1, wherein a temperature for the volumetric melt flow rate of 100 mm 3 /second of the copolymer is in a range of 150° to 300° C.
Claim 6
Dependent Claim
22 words
A fluorinated cation exchange membrane according to claim 1, wherein a glass transition temperature of the copolymer is lower than 70° C.
Claim 7
Dependent Claim
38 words
A fluorinated cation exchange membrane according to claim 1, wherein a water permeability of the copolymer under 1 m of water head at 60° C. in 4N-NaCl having pH of 10 is less than 10 ml/hour/m 2 .
Claim 8
Dependent Claim
24 words
A fluorinated cation exchange membrane according to claim 1, wherein a thickness of the membrane is in a range of 20 to 1000 microns.
Claim 9
Dependent Claim
32 words
A fluorinated cation exchange membrane according to claim 1, wherein the fluorovinylpolyether (I) is CF.sub.3 ═ CFOCF.sub.2 CF(CF.sub.3)O(CF.sub.2).sub.3 COOCH.sub.3 or Cf 2 ═ cfo(cf 2 ) 3 ocf(cf 3 cooch 3 .
Claim 10
Dependent Claim
24 words
a fluorinated cation exchange membrane according to claim 1, wherein the fluorovinyl compound (II) is CF.sub.2 ═ CFO(CF.sub.2).sub.2-4 COOCH.sub.3 or CF.sub.2 ═ CFO(CF.sub.2).sub.2-4 COF.
Claim 11
Dependent Claim
24 words
A fluorinated cation exchange membrane according to claim 1, wherein the fluorovinyl compound (II) is CF.sub.2 ═ CF(CF.sub.2).sub.0-4 COOCH.sub.3 or CF.sub.2 ═ CF(CF.sub.2).sub.0-4 COF.
Claim 12
Dependent Claim
18 words
A fluorinated cation exchange membrane according to claim 1, wherein the fluorinated olefin (III) is tetrafluoroethylene or trifluorochloroethylene.
Claim 13
Dependent Claim
38 words
A fluorinated cation exchange membrane according to claim 1, wherein the copolymer is produced by hydrolyzing a copolymer which comprises components of CF.sub.2 ═ CFOCF.sub.2 CF(CF.sub.3)O(CF.sub.2).sub.3 COOCH.sub.3 (I), cf.sub.2 ═ cfo(cf.sub.2).sub.3 cooch.sub.3 (ii) and CF.sub.2 ═ CF.sub.2 (III).
Claim 14
Dependent Claim
38 words
A fluorinated cation exchange membrane according to claim 1, wherein the copolymer is produced by hydrolyzing a copolymer which comprises components of CF.sub.2 ═ CFOCF.sub.2 CF(CF.sub.3)O(CF.sub.2).sub.3 COOCH.sub.3 (I), cf.sub.2 ═ cfcf.sub.2 cooch.sub.3 (ii) and CF.sub.2 ═ CF.sub.2 (III).
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) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |