US4418186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymer for fluorine-containing elastomer having excellent low temperature resistance and alcohol resistance
Assignee: AGC Inc
•
Filing: 1981-12-07
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Granted: 1983-11-29
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Expires: 2001-12-07
Abstract
Abstract A copolymer for a fluorine-containing elastomer having excellent low temperature resistance and alcohol resistance comprises vinylidene fluoride units and fluorovinyl ether units having the formula CF2=CFOX (X represents a C3-C9 perfluoroalkyl group which has ether bond having 1-3 oxygen atom) at a molar ratio of vinylidene fluoride units to fluorovinyl ether units of 95:5 to 50:50 and at a total content of the units of at least 80 mole %.
Inventors
- 👤 Masaaki Yamabe
- 👤 Gen Kojima
- 👤 Hiroshi Wachi
- 👤 Shun-ichi Kodama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:17
CPC Classifications
C; C08; C08F; C08F216/00; C08F216/12; C08F216/14; C08F216/1408; C08F214/00; C08F214/18; C08F214/22; C08F214/222
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
A copolymer for a fluorine-containing elastomer having excellent low temperature resistance and alcohol resistance which comprises vinylidene fluoride units and fluorovinyl ether units having the formula CF 2 ═CFOX, wherein x is a C 3 -C 9 perfluoralkyl group which has an ether bond or bonds having 1-3 oxygen atoms, at a molar ratio of said vinylidene fluoride units to said fluorovinyl ether units of 90:10 to 60:40 and at a total content of the units of at least 80 mole %; and perfluoro(2-bromoethyl vinyl ether) units at 0.1 to 5 mole %, based on the total copolymer.
Claim 2
Dependent Claim
98 words
A copolymer for a fluorine-containing elastomer having excellent low temperature resistance and alcohol resistance which comprises vinylidene fluoride units and fluorovinyl ether units having the formula CF 2 ═CFOX, wherein x is a C 3 -C 9 perfluoralkyl group which has an ether bond or bonds having 1-3 oxygen atoms, at a molar ratio of said vinylidene fluoride units to said fluorovinyl ether units of 90:10 to 60:40 and at a total content of the units of at least 80 mole %; and perfluoro(2-bromoethyl vinyl ether) units at 0.1 to 5 mole %, based on the total copolymer.
Claim 3
Dependent Claim
73 words
A copolymer for a fluorine-containing elastomer having excellent low temperature resistance and alcohol resistance which comprises vinylidene fluoride units and perfluoro(2-n-propoxypropyl vinyl ether) units, at a molar ratio of said vinylidene fluoride units to said perfluoro(2-n-propoxypropyl vinyl ether) units of 90:10 to 60:40 and at a total content of the units of at least 80 mole %; and perfluoro(2-bromoethyl vinyl ether) units at 0.1 to 5 mole %, based on the total copolymer.
Claim 4
Dependent Claim
73 words
A copolymer for a fluorine-containing elastomer having excellent low temperature resistance and alcohol resistance which comprises vinylidene fluoride units and perfluoro(2-n-propoxypropyl vinyl ether) units, at a molar ratio of said vinylidene fluoride units to said perfluoro(2-n-propoxypropyl vinyl ether) units of 90:10 to 60:40 and at a total content of the units of at least 80 mole %; and perfluoro(2-bromoethyl vinyl ether) units at 0.1 to 5 mole %, based on the total copolymer.
Claim 5
Dependent Claim
72 words
A copolymer for a fluorine-containing elastomer having excellent low temperature resistance and alcohol resistance which comprises vinylidene fluoride units and perfluoro(2-n-propoxypropyl vinyl ether) units, at a molar ratio of said vinylidene fluoride units to said perfluoro(2-n-propoxypropyl vinyl ether) units of 90:10 to 60:40 and at a total content of the units of at least 80 mole %, and perfluoro(propylvinyl ether) units, of 15 mole % or less, based on the total copolymer.
Claim 6
Dependent Claim
72 words
A copolymer for a fluorine-containing elastomer having excellent low temperature resistance and alcohol resistance which comprises vinylidene fluoride units and perfluoro(2-n-propoxypropyl vinyl ether) units, at a molar ratio of said vinylidene fluoride units to said perfluoro(2-n-propoxypropyl vinyl ether) units of 90:10 to 60:40 and at a total content of the units of at least 80 mole %, and perfluoro(propylvinyl ether) units, of 15 mole % or less, based on the total copolymer.
Claim 7
Dependent Claim
24 words
The copolymer according to claim 3, which further comprises perfluoro(2-bromoethyl vinyl ether) units at 0.1 to 5 mole %, based on the total copolymer.
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) | 1986-11-28 | 1987-05-30 | 1987-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-28 | 1991-05-30 | 1991-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-28 | 1995-05-30 | 1995-11-29 | $7700.00 | Window Closed / Lapsed |