US4942210A
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Branched isoolefin polymer prepared with adamantane catalyst system
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1987-08-24
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Granted: 1990-07-17
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Expires: 2007-08-24
Abstract
Abstract Isobutylene homopolymers and copolymers are prepared using a catalyst system comprising a haloadamantane component and a Lewis acid. Branched polymers are prepared using polyhaloadamantanes, the branches being attached to the adamantane at the former location of the halide. The preferred catalyst systems are diethylaluminum chloride and bromoadamantane as well as polybromo, or polychloroadamantanes.
Inventors
- 👤 Irving Kuntz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:09
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/04; C08F10/08; C08F10/10; Y; Y10; Y10S; Y10S525/00; Y10S525/918
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
48 words
An isoolefin polymer having the structural formula: AD--M).sub.n wherein AD represents an adamantyl nucleus, M is an isoolefin polymer moiety and n is an integer from 2 to 4, wherein said polymer is prepared using a catalyst system comprising a bromo- or chloro- adamantane and a Lewis acid.
Claim 2
Dependent Claim
48 words
An isoolefin polymer having the structural formula: AD--M).sub.n wherein AD represents an adamantyl nucleus, M is an isoolefin polymer moiety and n is an integer from 2 to 4, wherein said polymer is prepared using a catalyst system comprising a bromo- or chloro- adamantane and a Lewis acid.
Claim 3
Dependent Claim
19 words
The isoolefin polymer according to claim 1 wherein M is an isoolefin polymer moiety having a terminal functional group.
Claim 4
Dependent Claim
15 words
The isoolefin polymer according to claim 2 wherein the functional group is chloro- or bromo-.
Claim 5
Dependent Claim
19 words
The isoolefin polymer according to claim 2 wherein the functional group is carboxylic acid, hydroxyl or an amine moiety.
Claim 6
Dependent Claim
21 words
The isoolefin polymer according to claim 1 wherein M has a number average molecular weight of about 50 to about 1,250,000.
Claim 7
Dependent Claim
21 words
The isoolefin polymer according to claim 1 wherein M has a number average molecular weight of about 100 to about 500,000.
Claim 8
Dependent Claim
21 words
The isoolefin polymer according to claim 1 wherein M has a number average molecular weight of about 150 to about 300,000.
References Cited (Backward Citations)
EP0137574A2
Cited
US4602077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-16 | 1994-01-15 | 1994-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-16 | 1998-01-15 | 1998-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-16 | 2002-01-15 | 2002-07-17 | $7700.00 | Window Closed / Lapsed |