Patent US4510328A successfully refreshed from Google Patents.
US4510328A
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Fluorinated vinyl ether compounds and process for producing the same
Assignee: Asahi Kasei Corp
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Filing: 1981-09-03
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Granted: 1985-04-09
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Expires: 2001-09-03
Abstract
Abstract A novel fluorinated cation exchange membrane containing carboxylic acid groups and sulfonic acid groups, both in the form of a specific pendant structure, the carboxylic acid groups being at least 20% on one surface of the membrane and gradually decreasing toward the innerside of the membrane, which membrane is useful in electrolysis of an aqueous alkali metal halide solution with advantageously stable performance for a long term under more severe operational conditions than those conventionally used. The membrane can be prepared from a novel copolymer of a fluorinated olefin with a novel sulfur containing fluorinated vinylether of the formula: ##STR1## wherein k is 0 or 1, l is an integer of 3 to 5, Z is --S-- or --SO 2 -- and R is C 1 -C 10 alkyl, an aryl, Cl or C 1 -C 10 perfluoroalkyl.
Inventors
- 👤 Kyoji Kimoto
- 👤 Hirotsugu Miyauchi
- 👤 Jukichi Ohmura
- 👤 Mikio Ebisawa
- 👤 Toshioki Hane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:28
CPC Classifications
C; C07; C07D; C07D327/00; C07D327/02; C07D327/04; C07C; C07C309/00; C07C309/78; C07C309/79; C07C309/82; C07C309/84; C07C317/00; C07C317/16; C07C317/18; C07C323/00; C07C323/10; C07C323/11; C07C323/12; C08; C08F; C08F214/00; C08F214/18; C08F214/184; C08F214/26; C08F214/262; C08F216/00; C08F216/12; C08F216/14; C08F216/1466; C08F216/1475; C08F8/00; C08F8/04; C08F8/12; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2231; C08J5/2237; C08J2327/00; C08J2327/02; C08J2327/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A process for producing a fluorinated vinyl ether compound having the formula ##STR87## wherein X' is --SR or --SO 2 R, R being C 1 -C 10 alkyl, an aryl group, C 1 -C 10 perfluoroalkyl or chlorine, n is an integer of 2 to 4 and p' is an integer of 0 to 5, which comprises subjecting a compound having the formula: ##STR88## wherein X', n and p' have the same meanings as defined above and wherein W is F or OM', M' being an alkali metal, to pyrolysis at a temperature of from 100° to 600° C.
Claim 2
Dependent Claim
99 words
A process for producing a fluorinated vinyl ether compound having the formula ##STR87## wherein X' is --SR or --SO 2 R, R being C 1 -C 10 alkyl, an aryl group, C 1 -C 10 perfluoroalkyl or chlorine, n is an integer of 2 to 4 and p' is an integer of 0 to 5, which comprises subjecting a compound having the formula: ##STR88## wherein X', n and p' have the same meanings as defined above and wherein W is F or OM', M' being an alkali metal, to pyrolysis at a temperature of from 100° to 600° C.
Claim 3
Dependent Claim
22 words
A process according to claim 1, wherein the pyrolysis is conducted in the presence of a metal salt or a metal oxide.
Claim 4
Dependent Claim
24 words
A process according to claim 1, wherein the pyrolysis is conducted in the presence of sodium carbonate, potassium carbonate, sodium phosphate or potassium phosphate.
Claim 5
Dependent Claim
24 words
A process according to claim 1, wherein the pyrolysis is carried out for a period of time of from ten seconds to three hours.
Claim 6
Dependent Claim
24 words
A process according to claim 2, wherein the pyrolysis is carried out for a period of time of from ten seconds to three hours.
Claim 7
Dependent Claim
23 words
A fluorinated vinyl ether compound having the formula: ##STR89## wherein X' is --SC 2 H 5 ,p' is 1 and n is 2.
Claim 8
Dependent Claim
23 words
A fluorinated vinyl ether compound having the formula: ##STR89## wherein X' is --SC 2 H 5 ,p' is 1 and n is 2.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |