Patent US4774295A successfully refreshed from Google Patents.
US4774295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer mixtures and covulcanizates produced therefrom
Assignee: Lanxess Deutschland GmbH
•
Filing: 1986-12-11
•
Granted: 1988-09-27
•
Expires: 2006-12-11
Abstract
Abstract Covulcanizates with good mechanical properties obtained from mixtures of (a) from 50 to 5% by weight of chlorinated or chlorosulphonated polyethylene, acrylate rubber or ethylene vinyl alcohol copolymers and (b) from 50 to 95% by weight of partially or completely hydrogenated nitrile group-containing elastomers containing from 25 to 140 nitrile nitrogen atoms and less than 35 double bonds for each 1,000 carbon atoms, by cross linking.
Inventors
- 👤 Hartmuth Buding
- 👤 Heinrich Konigshofen
- 👤 Zsolt Szentivanyi
- 👤 Joachim Thormer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:12
CPC Classifications
C; C08; C08L; C08L15/00; C08L15/005; C08L23/00; C08L23/26; C08L23/32; C08L23/34; C08K; C08K3/00; C08K3/34; C08K3/36; C08K5/00; C08K5/0008; C08K5/0016; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0853; C08L23/0861; C08L23/28; C08L23/286; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L29/00; C08L29/02; C08L33/00; C08L33/04; C08L33/06; C08L33/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
79 words
A covulcanizate obtained by cross-linking a mixture consisting essentially of (a) from 50 to 5% by weight of chlorinated polyethylene, containing from 23 to 45% by weight chlorine, or chlorosulphonated polyethylene, containing from 20 to 40% by weight chlorine, acrylate rubber or ethylene vinyl alcohol copolymers and (b) from 50 to 95% by weight of a nitrile group containing elastomer with from 25 to 140 nitrile nitrogen atoms and less than 35 double bonds for each 1,000 carbon atoms.
Claim 2
Dependent Claim
79 words
A covulcanizate obtained by cross-linking a mixture consisting essentially of (a) from 50 to 5% by weight of chlorinated polyethylene, containing from 23 to 45% by weight chlorine, or chlorosulphonated polyethylene, containing from 20 to 40% by weight chlorine, acrylate rubber or ethylene vinyl alcohol copolymers and (b) from 50 to 95% by weight of a nitrile group containing elastomer with from 25 to 140 nitrile nitrogen atoms and less than 35 double bonds for each 1,000 carbon atoms.
Claim 3
Dependent Claim
24 words
A covulcanizate according to claim 1 of from 30 to 10% by weight of (a) and from 70 to 90% by weight of (b).
Claim 4
Dependent Claim
19 words
A covulcanizate according to claim 1, wherein (b) contains less than three double bonds for each 1,000 carbon atoms.
Claim 5
Dependent Claim
22 words
Mixtures according to claim 1, wherein up to 40% by weight of chlorinated or chlorosulphonated polyethylene (a) is replaced by polyvinyl chloride.
Claim 6
Dependent Claim
21 words
Mixtures according to claim 1, wherein the acrylate rubber contains at least 5% by weight of hydroxyethyl acrylate or halogenethyl acrylate.
Claim 7
Dependent Claim
23 words
Mixtures according to claim 1, wherein the ethylene vinyl alcohol copolymer has a vinyl alcohol content of from 20 to 70% by weight.
Claim 8
Dependent Claim
15 words
A covulcanizate according to claim 1, obtained by high-energy radiation, peroxide cross-linking or sulphur cross-linking.
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) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |