US4078020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic elastomers comprising ethylene-α-olefin copolymer, polypropylene and polybutene
Assignee: DIS 1201 AVE H EAST A CORP OF DELAWARE
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Filing: 1976-04-02
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Granted: 1978-03-07
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Expires: 1996-04-02
Abstract
Abstract Thermoplastic elastomeric compositions of this invention comprise (a) 25-80% of uncured ethylene-α-olefin copolymer, (b) 25-80% of crystalline isotactic polypropylene and 10-50% of crystalline isotactic polybutene-1. This composition is useful as a molding material exhibiting overall superior properties.
Inventors
- 👤 Rod A. Rose
- 👤 Andre Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:27
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; C08L23/10; C08L23/12; C08L23/18; C08L23/20; C08L2205/00; C08L2205/03; C08L2207/00; C08L2207/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
53 words
A thermoplastic elastomer composition comprising a. 20 to 80% by weight of an uncured ethylene-higher α-olefin copolymer, which consists essentially of 60-85% of ethylene and 15-40% of a higher α -olefin, b. 20 to 60% by weight of crystalline isotactic polypropylene, and c. 5 to 40% by weight of crystalline isotactic butene-1 homopolymer.
Claim 2
Dependent Claim
53 words
A thermoplastic elastomer composition comprising a. 20 to 80% by weight of an uncured ethylene-higher α-olefin copolymer, which consists essentially of 60-85% of ethylene and 15-40% of a higher α -olefin, b. 20 to 60% by weight of crystalline isotactic polypropylene, and c. 5 to 40% by weight of crystalline isotactic butene-1 homopolymer.
Claim 3
Dependent Claim
49 words
A composition of claim 1 which essentially comprises a. 30 to 50% by weight of an uncured ethylene-higher α-olefin copolymer which consists essentially of 60-85% of ethylene and 15-40% of propylene; b. 20-50% by weight of crystalline isotactic polypropylene; and c. 10-30% by weight of crystalline isotactic butene-1 homopolymer.
Claim 4
Dependent Claim
20 words
A composition of claim 2 wherein the ethylene-higher α-olefin copolymer consists essentially of 65-82% of ethylene and 18-35% of propylene.
Claim 5
Dependent Claim
53 words
A composition of claim 1 which consists essentially of a. 30 to 50% by weight of an uncured ethylene-higher α-olefin copolymer which consists essentially of 60-85% of ethylene, 15-40% of propylene and 1-5% of a diene; b. 30-50% by weight of crystalline isotactic polypropylene; and c. 10-30% by weight of crystalline isotactic polybutene-1.
Claim 6
Dependent Claim
18 words
A composition of claim 4 wherein in the ethylene-higher α-olefin copolymer the diene is 1,4-hexadiene, ethylidenenorbornene or dicyclopentadiene.
Claim 7
Dependent Claim
15 words
A composition of claim 1 containing additionally an antioxidant, a UV stabilizer and a filler.
Claim 8
Dependent Claim
22 words
A composition of claim 1 consisting essentially of a. 40% of ethylene-propylene-diene copolymer, b. 40% of polypropylene, and c. 20% of polybutene-1.
Claim 9
Dependent Claim
22 words
A composition of claim 1 consisting essentially of a. 60% of ethylene-propylene-diene copolymer, b. 30% of polypropylene, and c. 10% of polybutene-1.
Claim 10
Dependent Claim
22 words
A composition of claim 1 consisting essentially of a. 34% of ethylene-propylene-diene copolymer b. 55% of polypropylene, and c. 11% of polybutene-1.
Claim 11
Dependent Claim
22 words
A composition of claim 1 consisting essentially of a. 60% of ethylene-propyelen-diene copolymer, b. 30% of polypropylene and c. 10% of polybutene-1.
Claim 12
Dependent Claim
22 words
A composition of claim 1 consisting essentially of a. 40% of ethylene-propylene copolymer, b. 40% of polypropylene, and c. 20% of polybutene-1.
Claim 13
Dependent Claim
22 words
A composition of claim 1 consisting essentially of a. 40% of ethylene-propylene copolymer, b. 45% of polypropylene, and c. 15% of polybutene-1.
References Cited (Backward Citations)
GB1037819A
Cited
US3836607A
Cited
US3806558A
Cited
US3835201A
Cited
US3849520A
Cited
US3946897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |