US4694045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Base resistant fluoroelastomers
Assignee: EIDP Inc
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Filing: 1986-06-17
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Granted: 1987-09-15
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Expires: 2006-06-17
Abstract
Abstract A base resistant, substantially amorphous fluoroelastomer comprising (1) 10-40 mole percent ethylene units, (2) 32-60 mole percent tetrafluoroethylene units, (3) 20-40 mole percent perfluoro(alkyl vinyl ether) units wherein the alkyl group contains 1-5 carbon atoms, and (4) a cure-site monomer. Such fluoroelastomers are resistant to attack by amines, strong bases and hydrogen sulfide and possess a combination of good low temperature and high temperature properties and they are resistant to oil swell.
Inventors
- 👤 Albert L. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:10
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/26; C08F214/262; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
57 words
A base resistant, substantially amorphous fluoroelastomer consisting essentially of (1) 10-40 mole percent ethylene units, (2) 32-60 mole percent tetrafluoroethylene units, (3) 20-40 mole percent perfluoro(alkyl vinyl ether) units wherein the alkyl group contains 1-5 carbon atoms, and (4) 0.2-3 mole percent of a cure-site monomer, said fluoroelastomer having a glass transition temperature below about -10° C.
Claim 2
Dependent Claim
57 words
A base resistant, substantially amorphous fluoroelastomer consisting essentially of (1) 10-40 mole percent ethylene units, (2) 32-60 mole percent tetrafluoroethylene units, (3) 20-40 mole percent perfluoro(alkyl vinyl ether) units wherein the alkyl group contains 1-5 carbon atoms, and (4) 0.2-3 mole percent of a cure-site monomer, said fluoroelastomer having a glass transition temperature below about -10° C.
Claim 3
Dependent Claim
15 words
A fluoroelastomer of claim 1 wherein the perfluoro(alkyl vinyl ether) units are perfluoro(methyl vinyl ether).
Claim 4
Dependent Claim
34 words
A fluoroelastomer of claim 1 consisting essentially of (1) 20-40 mole percent ethylene units, (2) 32-60 mole percent tetrafluoroethylene units, 20-35 mole percent perfluoro(alkyl vinyl ether) units, and (4) a peroxide curable cure-site monomer.
Claim 5
Dependent Claim
15 words
A fluoroelastomer of claim 3 wherein the perfluoro(alkyl vinyl ether) units are perfluoro(methyl vinyl ether).
Claim 6
Dependent Claim
17 words
A fluoroelastomer of claim 1 wherein the cure-site monomer is a bromine-containing olefin containing 2-20 carbon atoms.
Claim 7
Dependent Claim
17 words
A fluoroelastomer of claim 1 wherein the cure-site monomer is an iodine-containing olefin containing 2-20 carbon atoms.
Claim 8
Dependent Claim
24 words
A fluoroelastomer of claim 1 wherein the cure-site monomer is a halogenated vinyl ether of the formula: ##STR5## where n is 1 or 2.
Claim 9
Dependent Claim
30 words
A fluoroelastomer of claim 1 wherein the cure-site monomer is a halogenated vinyl either of the formula: ##STR6## where X is 1 to 2, and n is 1 to 4.
Claim 10
Dependent Claim
39 words
A fluoroelastomer of claim 1 wherein the cure-site monomer is a halogenated vinyl ether of the formula: CX.sub.2 ═CXO(CX.sub.2).sub.n CX.sub.2 Y where Y is chlorine, bromine or iodine, X is hydrogen or fluorine and n is 1 to 9.
Claim 11
Dependent Claim
11 words
A fluoroelastomer of claim 5 wherein the bromine-containing olefin is 4-bromo-3,3,4,4-tetrafluorobutene-1.
Claim 12
Dependent Claim
12 words
A fluoroelastomer of claim 8 wherein the halogenated vinyl ether is perfluoro-(8-cyano-5-methyl-3,6-dioxa-1-octene).
Claim 13
Dependent Claim
22 words
A fluoroelastomer of claim 5 containing a polyunsaturated compound that is a coagent and capable of cooperating with a peroxide curing agent.
Claim 14
Dependent Claim
13 words
A fluoroelastomer of claim 12 wherein the polyunsaturated compound is trimethallylisocyanurate or triallylisocyanurate.
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) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |