US4140732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic rubber compositions comprising polyolefin and sequential E/P or EPDM
Assignee: Advanced Elastomer Systems LP
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Filing: 1977-09-13
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Granted: 1979-02-20
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Expires: 1997-09-13
Abstract
Abstract A mixture of polyolefin resins and partially crosslinked ethylene-propylene sequential polymer and/or ethylene-propylene-diene sequential polymer representing a so-called thermoplastic rubber having improved properties.
Inventors
- 👤 Jochen Schnetger
- 👤 Manfred Beck
- 👤 Gunter Marwede
- 👤 Gottfried Pampus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:16
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08K; C08K5/00; C08K5/04; C08K5/14; C08K5/49; C08L23/10; C08L23/16; C08L53/00; C08L2312/00; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
21 words
Mixtures of 10-95% by weight of polyolefin resin and 90-5% of partially crystalline, partially crosslinked sequential polymers of ethylene-propylene or ethylene-propylene-diene.
Claim 2
Dependent Claim
21 words
Mixtures of 10-95% by weight of polyolefin resin and 90-5% of partially crystalline, partially crosslinked sequential polymers of ethylene-propylene or ethylene-propylene-diene.
Claim 3
Dependent Claim
21 words
Mixtures as claimed in claim 1, wherein polypropylene or polyethylene of low or high density is used as the polyolefin resin.
Claim 4
Dependent Claim
18 words
Mixtures as claimed in claim 1, wherein isotactic polypropylene of high crystallinity is used as the polyolefin resin.
Claim 5
Dependent Claim
41 words
Mixtures as claimed in claim 1, wherein ethylene-propylene or ethylene-propylene-diene sequential polymers consisting of 63 to 95 parts by weight of ethylene, 5 to 37 parts by weight of propylene and 0 to 15 parts by weight of tercomponent are used.
Claim 6
Dependent Claim
40 words
Mixtures as claimed in claim 4, wherein ethylene-propylene or ethylene-propylene-diene sequential polymers consisting of 70 to 85 parts by weight of ethylene, 15 to 30 parts by weight of propylene and 5 to 10 parts by weight tercomponent are used.
Claim 7
Dependent Claim
22 words
Mixtures as claimed in claim 1, wherein ethylene-propylene-diene sequential polymers, in which the diene component is dicyclopentadiene or ethylidene norbornene, are used.
Claim 8
Dependent Claim
80 words
A process for producing the mixtures claimed in claim 1, wherein either a. ethylene-propylene or ethylene-propylene-diene sequential polymer partially crosslinked with peroxidic crosslinking agents is mixed with polyolefin resins, the partial crosslinking step having been carried out with 0.05 to 10% by weight of crosslinking agent at temperatures of from 150° to 250° C., or b. polyolefin resins and ethylene-propylene or ethylene-propylene-diene sequential polymer are mixed and the mixture thus obtained is partially crosslinked under the conditions of alternative a).
Claim 9
Dependent Claim
21 words
The use of mixtures according to claim 1 as thermoplastic rubber compositions for production of shaped articles by molding or extrusion.
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) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |