US4654394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorine-containing elastomer having excellent low temperature resistance and oil resistance
Assignee: AGC Inc
•
Filing: 1985-02-04
•
Granted: 1987-03-31
•
Expires: 2005-02-04
Abstract
Abstract A fluorine-containing elastomer having excellent low temperature resistance and oil resistance comprises ethylene units (E) and fluorovinyl ether units (FV) having the formula CF 2 ═CFOX (X represents a C 1 -C 9 perfluoroalkyl group which can have one or more ether bond) at a molar ratio of (E) to (FV) of 95:5 to 30:70 and at a total content of (E) and (FV) of at least 70 mole %.
Inventors
- 👤 Masaaki Yamabe
- 👤 Shun-ichi Kodama
- 👤 Gen Kojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:22
CPC Classifications
C; C08; C08F; C08F216/00; C08F216/12; C08F216/14; C08F216/1408; C08F210/00; C08F210/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
63 words
A fluorine-containing elastomer having excellent low temperature resistance and oil resistance which comprises ethylene units (E) and fluorovinyl ether units (FV) having the formula CF 2 ═CFOX (X represents a C 1 -C 9 perfluoroalkyl group) at a molar ratio of (E) to (FV) of 65.5:34.5 to 30:70 and at a total content of (E) and (FV) of at least 70 mole %.
Claim 2
Dependent Claim
63 words
A fluorine-containing elastomer having excellent low temperature resistance and oil resistance which comprises ethylene units (E) and fluorovinyl ether units (FV) having the formula CF 2 ═CFOX (X represents a C 1 -C 9 perfluoroalkyl group) at a molar ratio of (E) to (FV) of 65.5:34.5 to 30:70 and at a total content of (E) and (FV) of at least 70 mole %.
Claim 3
Dependent Claim
16 words
The elastomer according to claim 1 wherein X represents a C 1 -C 6 perfluoroalkyl group.
Claim 4
Dependent Claim
16 words
The elastomer according to claim 2 wherein X represents a C 1 -C 3 perfluoroalkyl group.
Claim 5
Dependent Claim
14 words
The elastomer according to claim 1 wherein said fluorovinyl ether is perfluoro(methyl vinyl ether).
Claim 6
Dependent Claim
13 words
The elastomer according to claim 1 wherein said additional monomer is a fluoroolefin.
Claim 7
Dependent Claim
24 words
The elastomer according to claim 5 wherein said fluoroolefin is selected from the group consisting of tetrafluoroethylene, vinylidene fluoride, chlorotrifluoroethylene, vinyl fluoride and hexafluoropropylene.
Claim 8
Dependent Claim
13 words
The elastomer according to claim 1 wherein said additional monomer is an olefin.
Claim 9
Dependent Claim
20 words
The elastomer according to claim 7 wherein said olefin is selected from the group consisting of propylene, isobutylene and butene-1.
Claim 10
Dependent Claim
14 words
The elastomer according to claim 1 wherein said additional monomer is a vinyl ether.
Claim 11
Dependent Claim
27 words
The elastomer according to claim 9 wherein said vinyl ether is selected from the group consisting of ethyl vinyl ether, 2-chloroethyl vinyl ether, and perfluoro(2-bromoethyl vinyl ether).
Claim 12
Dependent Claim
13 words
The elastomer according to claim 1 wherein said additional monomer is vinyl monochloroacetate.
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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) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |