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US4115481A
Expired / Lapsed
US
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Fluoroelastomer blend composition
Assignee: EIDP Inc
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Filing: 1977-09-16
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Granted: 1978-09-19
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Expires: 1997-09-16
Abstract
Abstract A curable fluoroelastomer blend comprising:
Inventors
- 👤 Joseph Burton Finlay
- 👤 Hisanori Omura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:58
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/16; C08L2205/00; C08L2205/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
49 words
A fluoroelastomer blend comprising: (a) 5-90 weight percent of a non-crosslinked fluoroelastomer comprising a copolymer of vinylidene fluoride and at least one other fluoroolefin, and (b) 10-95 weight percent of a partially crosslinked fluoroelastomer comprising vinylidene fluoride, at least one other fluoroolefin and about 0.5-3.0 mole percent of bromotrifluoroethylene.
Claim 2
Dependent Claim
49 words
A fluoroelastomer blend comprising: (a) 5-90 weight percent of a non-crosslinked fluoroelastomer comprising a copolymer of vinylidene fluoride and at least one other fluoroolefin, and (b) 10-95 weight percent of a partially crosslinked fluoroelastomer comprising vinylidene fluoride, at least one other fluoroolefin and about 0.5-3.0 mole percent of bromotrifluoroethylene.
Claim 3
Dependent Claim
17 words
A fluoroelastomer blend of claim 1 wherein the non-crosslinked fluoroelastomer comprises 10-80 weight percent of the blend.
Claim 4
Dependent Claim
17 words
A fluoroelastomer blend of claim 1 wherein the non-crosslinked fluoroelastomer comprises 10-20 weight percent of the blend.
Claim 5
Dependent Claim
11 words
A fluoroelastomer blend of claim 1 wherein component (a) contains tetrafluoroethylene.
Claim 6
Dependent Claim
11 words
A fluoroelastomer blend of claim 1 wherein component (a) contains hexafluoropropylene.
Claim 7
Dependent Claim
16 words
A fluoroelastomer blend of claim 1 wherein component (b) has an insolubility value of about 50-65%.
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) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |