Patent US4413094A successfully refreshed from Google Patents.
US4413094A
Expired / Lapsed
US
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Perfluoroelastomer blends
Assignee: EIDP Inc
•
Filing: 1982-09-29
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Granted: 1983-11-01
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Expires: 2002-09-29
Abstract
Abstract Co-vulcanizable fluoroelastomer blends of tetrafluoroethylene/perfluoro-(methylvinyl-ether)/cure-site monomer terpolymer and hexafluoropropylene oxide/cure-site monomer dipolymer.
Inventors
- 👤 Carl A. Aufdermarsh, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:28
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
65 words
A co-vulcanizable fluoroelastomer blend consisting essentially of (a) 50-95 weight percent of at least one tetrafluoroethylene/perfluoro-(methylvinyl ether)/cure-site monomer terpolymer and (b) 5-50 weight percent of at least one hexafluoropropylene oxide/cure-site monomer dipolymer, wherein the reactive functional group of the cure-site monomer in the terpolymer is the same as in the dipolymer and is selected from the group consisting of --C 6 F 5 and --CN.
Claim 2
Dependent Claim
65 words
A co-vulcanizable fluoroelastomer blend consisting essentially of (a) 50-95 weight percent of at least one tetrafluoroethylene/perfluoro-(methylvinyl ether)/cure-site monomer terpolymer and (b) 5-50 weight percent of at least one hexafluoropropylene oxide/cure-site monomer dipolymer, wherein the reactive functional group of the cure-site monomer in the terpolymer is the same as in the dipolymer and is selected from the group consisting of --C 6 F 5 and --CN.
Claim 3
Dependent Claim
22 words
The blend of claim 1 wherein the terpolymer comprises 65-80 weight percent of the blend and the dipolymer comprises 20-35 weight percent.
Claim 4
Dependent Claim
12 words
The blend of claim 1 wherein the terpolymer cure-site monomer is perfluoro-(8-cyano-5-methyl-3,6-dioxa-1-octene).
Claim 5
Dependent Claim
18 words
The blend of claim 1 wherein the number average molecular weight of the dipolymer is greater than 15,000.
Claim 6
Dependent Claim
14 words
The blend of claim 1 wherein the terpolymer cure-site monomer is perfluoro-(2-phenoxypropyl vinyl ether).
Claim 7
Dependent Claim
13 words
The blend of claim 1 wherein the dipolymer cure-site monomer is perfluoro-(6,7-epoxy-4-oxaheptane nitrile).
Claim 8
Dependent Claim
13 words
The blend of claim 1 wherein the dipolymer cure-site monomer is perfluoro-(phenyl-2,3-epoxypropyl ether).
Claim 9
Dependent Claim
16 words
The blend of claim 1 wherein the terpolymer has an inherent viscosity of at least 0.4.
References Cited (Backward Citations)
US3019206A
Cited
US3105827A
Cited
US3030260A
Cited
US3051683A
Cited
US3291864A
Cited
US3400065A
Cited
US3546186A
Cited
US3467638A
Cited
US3484503A
Cited
US3531432A
Cited
US3769371A
Cited
US3682872A
Cited
US3723577A
Cited
US3851018A
Cited
US4200568A
Cited
US4094949A
Cited
US3987126A
Cited
US4128693A
Cited
US4115481A
Cited
US4281092A
Cited
US4356291A
Cited
US4360645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |