US4622375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amorphous ethylene/propylene polymers
Assignee: Shell USA Inc
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Filing: 1986-03-28
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Granted: 1986-11-11
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Expires: 2006-03-28
Abstract
Abstract Solid amorphous copolymers of ethylene, propylene and an olefinic benzocyclobutene monomer of the formula ##STR1## where R 1 is hydrogen or CH 3 and R 2 is --CH 2 -- n where n is 0 to 6 are claimed. Such copolymers can be easily crosslinked at temperatures above about 200° C., resulting in elastomers having improved creep resistance.
Inventors
- 👤 Pui K. Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:04
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/16
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
38 words
A solid substantially amorphous copolymer of ethylene, propylene and an olefinic benzocyclobutene monomer of the formula: where R 1 is hydrogen or CH 3 and R 2 is --CH 2 -- n where n is 0 to 6.
Claim 2
Dependent Claim
38 words
A solid substantially amorphous copolymer of ethylene, propylene and an olefinic benzocyclobutene monomer of the formula: where R 1 is hydrogen or CH 3 and R 2 is --CH 2 -- n where n is 0 to 6.
Claim 3
Dependent Claim
32 words
The copolymer of claim 1 comprising about 20 to about 80 mole percent ethylene, about 80 to about 20 mole percent propylene and about 0.1 to about 20 mole percent olefinic benzocyclobutene.
Claim 4
Dependent Claim
24 words
The copolymer of claim 1 wherein said olefinic benzocyclobutene monomer is selected from the group consisting of: 4-(3-butenyl)benzocyclobutene 3-(3-butenyl)benzocyclobutene 4-allylbenzocyclobutene 3-allylbenzycyclobutene 4-vinylbenzocyclobutene, and 3-vinylbenzocyclobutene.
Claim 5
Dependent Claim
16 words
The copolymer of claim 1 wherein R 1 is hydrogen and n is 0 to 2.
Claim 6
Dependent Claim
12 words
The copolymer of claim 1 wherein said olefinic benzocyclobutene monomer is 4-(3-butenyl)benzocyclobutene.
Claim 7
Dependent Claim
22 words
A solid copolymer having improved creep resistance prepared by heating the copolymer of claim 1 to a temperature above about 200° C.
Claim 8
Dependent Claim
52 words
A process for preparing a solid substantially amorphous polymer comprises copolymerizing ethylene, propylene and an olefinic benzocyclobutene monomer of the formula: ##STR8## where R 1 is hydrogen or CH 3 and R 2 is --CH 2 -- n where n is 0 to 6, in the presence of a polyolefin coordination catalyst.
Claim 9
Dependent Claim
52 words
A process for preparing a solid substantially amorphous polymer comprises copolymerizing ethylene, propylene and an olefinic benzocyclobutene monomer of the formula: ##STR8## where R 1 is hydrogen or CH 3 and R 2 is --CH 2 -- n where n is 0 to 6, in the presence of a polyolefin coordination catalyst.
Claim 10
Dependent Claim
51 words
The process of claim 7 wherein the amounts of ethylene, propylene and benzocyclobutene monomer employed in the process are such that the resulting copolymer comprises about 20 to about 80 mole percent ethylene, about 80 to about 20 mole percent propylene and about 0.1 to about 20 mole percent olefinic benzocyclobutene.
Claim 11
Dependent Claim
24 words
The process of claim 7 wherein said olefinic benzocyclobutene monomer is selected from the group consisting of: 4-(3-butenyl)benzocyclobutene 3-(3-butenyl)benzocyclobutene 4-allylbenzocyclobutene 3-allylbenzycyclobutene 4-vinylbenzocyclobutene, and 3-vinylbenzocyclobutene.
Claim 12
Dependent Claim
12 words
The process of claim 7 wherein said olefinic benzocyclobutene monomer is 4-(3-butenyl)benzocyclobutene.
Claim 13
Dependent Claim
16 words
The process of claim 7 wherein said coordination catalyst is a vanadium(V) trichloride oxide-triethyldialuminum trichloride catalyst.
References Cited (Backward Citations)
US4540763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-10 | 1990-05-12 | 1990-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-10 | 1994-05-12 | 1994-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-10 | 1998-05-12 | 1998-11-11 | $7700.00 | Window Closed / Lapsed |