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US5204429A
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US
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Process for the preparation of an olefin polymer
Assignee: Ticona GmbH
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Filing: 1988-08-04
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Granted: 1993-04-20
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Expires: 2008-08-04
Abstract
Abstract Crystalline, isotactic homopolymers of cycloolefins or elastic copolymers made from cycloolefins and linear olefins are obtained, without ring opening of the cycloolefins, at industrially favorable polymerization temperatures by means of a catalyst which comprises a stereorigid, chiral metallocene compound of groups IVb to VIb of the Periodic Table of the Elements and an aluminoxane.
Inventors
- 👤 Walter Kaminsky
- 👤 Regina Spiehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:31
CPC Classifications
C; C08; C08F; C08F32/00; C08F32/02; C08F32/04; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
78 words
A homopolymer or copolymer containing 80 to 100 mol-% repeating cyclic units derived from a cycloolefin monomer, the balance of up to 20 mol-% of the repeating units, in the case of a copolymer, being derived from at least one linear monomer selected from the group consisting a C 2 --to C 28 --1--olefin and a C 4 --to C 28 --diolefin, said copolymer having a polydispersity, M w /M n ranging in value from 2.9 to 6.0.
Claim 2
Dependent Claim
78 words
A homopolymer or copolymer containing 80 to 100 mol-% repeating cyclic units derived from a cycloolefin monomer, the balance of up to 20 mol-% of the repeating units, in the case of a copolymer, being derived from at least one linear monomer selected from the group consisting a C 2 --to C 28 --1--olefin and a C 4 --to C 28 --diolefin, said copolymer having a polydispersity, M w /M n ranging in value from 2.9 to 6.0.
Claim 3
Dependent Claim
34 words
A homopolymer or copolymer as claimed in claim 1, containing 90 to 100% repeating cyclic units derived from a monomer of the formula ##STR10## in which n is a number from 2 to 10.
Claim 4
Dependent Claim
30 words
A copolymer according to claim 2 containing up to 10 mol-% repeating units derived from a C 2 to C 6 1--olefin or a C 4 to C 12 --diolefin.
Claim 5
Dependent Claim
25 words
A crystalline isotactic polycyclopentene, comprising repeating cyclopentene units in which the monomer rings are fully retained, said polycyclopentene having a melting point above 250° C.
Claim 6
Dependent Claim
25 words
A crystalline isotactic polycyclopentene, comprising repeating cyclopentene units in which the monomer rings are fully retained, said polycyclopentene having a melting point above 250° C.
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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) | 1996-04-19 | 1996-10-19 | 1997-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-19 | 2000-10-19 | 2001-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-19 | 2004-10-19 | 2005-04-20 | $7700.00 | Window Closed / Lapsed |