Patent US4816517A successfully refreshed from Google Patents.
US4816517A
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Crosslinked polymer interdispersions containing polyolefin and method of making
Assignee: Vulkor Inc
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Filing: 1985-05-23
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Granted: 1989-03-28
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Expires: 2005-05-23
Abstract
Abstract Polyblend interdispersions of two or more different polymers formed at least partially in the presence of an interdispersing aid which can be polytetrafluoroethylene or ultra high molecular weight polyethylene; said blend can be chemically cross-linked with peroxides.
Inventors
- 👤 Edward V. Wilkus
- 👤 Alexander F. Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:17
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; C; C08; C08L; C08L101/00; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/08; C08L23/0807; C08L23/0815; C08L23/10; C08L23/16; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L59/00; C08L67/00; C08L7/00; C08L11/00; C08L2205/00; C08L2205/02; C08L2205/025; C08L2205/03; C08L2205/035; C08L23/26; C08L23/28; C08L23/286; C08L2312/00; C08L27/12; C08L27/18; C08L51/00; C08L51/06; C08L53/00; C08L53/02; C08L69/00; C08L77/00; C08L83/00; C08L83/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
82 words
A composition of matter, which comprises a chemically crosslinkable interdispersion of a polyolefin polymer selected from the group consisting of: low density polyethylene high density polyethylene linear low density polyethylene semi-crystalline ethylene propylene compolymers and ethylene propylene diene monomer copolymers ethylene vinyl acetate copolymer, and modified polyethylene with at least one distinct polymer selected from the group consisting of: ethylene propylene rubber said interdispersion being at least partially formed with polytetrafluoroethylene, as the interdispersing agent; said interdispersion containing a peroxide crosslinking agent.
Claim 2
Dependent Claim
82 words
A composition of matter, which comprises a chemically crosslinkable interdispersion of a polyolefin polymer selected from the group consisting of: low density polyethylene high density polyethylene linear low density polyethylene semi-crystalline ethylene propylene compolymers and ethylene propylene diene monomer copolymers ethylene vinyl acetate copolymer, and modified polyethylene with at least one distinct polymer selected from the group consisting of: ethylene propylene rubber said interdispersion being at least partially formed with polytetrafluoroethylene, as the interdispersing agent; said interdispersion containing a peroxide crosslinking agent.
Claim 3
Dependent Claim
19 words
A composition of matter as defined in claim 1 which contains from 0.001 to 20% by weight of polytetrafluoroethylene.
Claim 4
Dependent Claim
22 words
A composition of matter as defined in claim 2 which contains about 1.5 parts polytetrafluoroethylene per hundred parts polyolefin and EPR rubber.
Claim 5
Dependent Claim
38 words
A composition which comprises a chemically crosslinkable interdispersion of low densitsy polyethylene, ethylene propylene rubber, a peroxide crosslinking agent and an amount of polytetrafluoroethylene which is sufficient to interdisperse said low density polyethylene and said ethylene propylene rubber.
Claim 6
Dependent Claim
38 words
A composition which comprises a chemically crosslinkable interdispersion of low densitsy polyethylene, ethylene propylene rubber, a peroxide crosslinking agent and an amount of polytetrafluoroethylene which is sufficient to interdisperse said low density polyethylene and said ethylene propylene rubber.
Claim 7
Dependent Claim
22 words
A composition as defined in claim 4 which consists essentially of low density polyethylene, ethylene propylene rubber peroxide crosslinking agent and polytetrafluoroethylene.
Claim 8
Dependent Claim
21 words
A composition as defined in claim 4 wherein the ratio of the polyethyene to ethylene propylene rubber is 10:90 to 90:10.
Claim 9
Dependent Claim
21 words
A composition as defined in claim 4 wherein the ratio of the polyethylene to ethylene propylene rubber is 20:80 to 80;20.
Claim 10
Dependent Claim
14 words
A composition as defined in claim 5 which contain 0.001-20% by weight of polytetrafluoroethylene.
Claim 11
Dependent Claim
24 words
A composition as defined in claim 5 which contain about 1.5 parts of polytetrafluoroethylene per hundred parts by weight of polyolefin and EPR rubber.
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) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |