Patent US4734472A successfully refreshed from Google Patents.
US4734472A
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Method for preparing functional alpha-olefin polymers and copolymers
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1986-12-24
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Granted: 1988-03-29
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Expires: 2006-12-24
Abstract
Abstract The present invention relates to a process for the preparation of functional alpha-olefin homo- and copolymers by polymerization through a borane monomer intermediate. Borane monomers, derived from mono-hydroboration of appropriate dienes with dialkyl borane, have been found to be stable to Ziegler-Natta catalysts. In turn, the borane homo- and copolymers are easily converted to a variety of other functionalities; e.g., alcohols, aldehydes, amines, etc.
Inventors
- 👤 Tze-Chiang Chung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:27
CPC Classifications
C; C08; C08F; C08F30/00; C08F30/04; C08F30/06; C08F8/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
22 words
A homopolymer having the formula: ##STR2## wherein n=b 6 to 12 and R 1 and R 2 are alkyl or cycloalkyl groups.
Claim 2
Dependent Claim
22 words
A homopolymer having the formula: ##STR2## wherein n=b 6 to 12 and R 1 and R 2 are alkyl or cycloalkyl groups.
Claim 3
Dependent Claim
24 words
A homopolymer having the formula: ##STR3## wherein n=3 to 12 and W is a functional group consisting of OH, NH 2 and CHO groups.
Claim 4
Dependent Claim
24 words
A homopolymer having the formula: ##STR3## wherein n=3 to 12 and W is a functional group consisting of OH, NH 2 and CHO groups.
Claim 5
Dependent Claim
61 words
A random copolymer having the structure of ##STR4## wherein n=3 to 12; x is about 1 to about 99 mole percent; y is about 99 to about 1 mole percent; R 3 is hydrogen or an alkyl group having about 1 to about 20 carbon atoms; and W is selected from the group consisting of OH, NH 2 and CHO groups.
Claim 6
Dependent Claim
61 words
A random copolymer having the structure of ##STR4## wherein n=3 to 12; x is about 1 to about 99 mole percent; y is about 99 to about 1 mole percent; R 3 is hydrogen or an alkyl group having about 1 to about 20 carbon atoms; and W is selected from the group consisting of OH, NH 2 and CHO groups.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |