US4565614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer mixtures and co-vulcanizates produced therefrom
Assignee: Bayer AG
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Filing: 1984-10-04
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Granted: 1986-01-21
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Expires: 2004-10-04
Abstract
Abstract Co-vulcanizates are produced from mixtures of (a) from 95 to 5% by weight of fluoroelastomers and (b) from 5 to 95% by weight of elastomers which contain nitrile groups and have from 25 to 140 nitrile-nitrogen atoms and less than 35 double bonds per 1000 carbon atoms, and (c) conventional mixture ingredients, the percentages relating to the sum total of (a) and (b). The co-vulcanizates are suitable for the production of seals and other rubber articles, in particular for areas of use which impose exacting requirements.
Inventors
- 👤 Hartmuth Buding
- 👤 Zsolt Szentivanyi
- 👤 Joachim Thormer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:46
CPC Classifications
C; C08; C08L; C08L15/00; C08L15/005; C08L27/00; C08L27/02; C08L27/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
55 words
Mixtures comprising (a) from 95 to 5% by weight of a fluoroelastomer and (b) from 5 to 95% by weight of an elastomer which contains nitrile groups and has from 25 to 140 nitrile-nitrogen atoms and less than 35 double bonds per 1000 carbon atoms, the percentages relating to the total of (a) and (b).
Claim 2
Dependent Claim
55 words
Mixtures comprising (a) from 95 to 5% by weight of a fluoroelastomer and (b) from 5 to 95% by weight of an elastomer which contains nitrile groups and has from 25 to 140 nitrile-nitrogen atoms and less than 35 double bonds per 1000 carbon atoms, the percentages relating to the total of (a) and (b).
Claim 3
Dependent Claim
23 words
Mixtures according to claim 1 of from 70 to 10% by weight of (a) and from 30 to 90% by weight of (b).
Claim 4
Dependent Claim
18 words
Mixtures according to claim 1, in which (b) contains less than 12 double bonds per 1000 carbon atoms.
Claim 5
Dependent Claim
18 words
Mixtures according to claim 1, in which (b) contains less than 2 double bonds per 1000 carbon atoms.
Claim 6
Dependent Claim
16 words
Co-vulcanisates produced from the mixtures according to claim 1 by peroxidic cross-linking or by radiation cross-linking.
References Cited (Backward Citations)
US3700637A
Cited
US4251432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |