US4822871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process
Assignee: Shell USA Inc
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Filing: 1987-12-18
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Granted: 1989-04-18
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Expires: 2007-12-18
Abstract
Abstract A linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon exhibits improved thermal stability as evidenced by reduced weight loss at elevated temperatures and enhanced crystallinity and crystallizability when produced with a catalyst composition formed from preformed palladium trifluoroacetate and a bidentate phosphine ligand.
Inventors
- 👤 G. Bruce Klingensmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:09
CPC Classifications
C; C08; C08G; C08G67/00; C08G67/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
55 words
In the process of producing linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon in the presence of a catalyst composition formed from a palladium compound, the anion of trifluoroacetic acid and a bidentate phosphine ligand, the improvement which comprises providing the palladium compound and trifluoroacetate anion as preformed palladium trifluoroacetate.
Claim 2
Dependent Claim
55 words
In the process of producing linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon in the presence of a catalyst composition formed from a palladium compound, the anion of trifluoroacetic acid and a bidentate phosphine ligand, the improvement which comprises providing the palladium compound and trifluoroacetate anion as preformed palladium trifluoroacetate.
Claim 3
Dependent Claim
95 words
In the process of producing the linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon represented by the formula --CO--CH.sub.2 --CH.sub.2)].sub.x [CO--B)].sub.y wherein B is a moiety of ethyenically unsaturated hydrocarbon of at least 3 carbon atoms and up to 10 carbon atoms and the ratio of y:x is up to about 0.5, in the presence of a catalyst composition formed from a palladium compound, the anion of trifluoroacetic acid and a bidentate phosphine ligand, the improvement which comprises providing the palladium compound and the trifluoroacetate anion as preformed palladium trifluoroacetate.
Claim 4
Dependent Claim
95 words
In the process of producing the linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon represented by the formula --CO--CH.sub.2 --CH.sub.2)].sub.x [CO--B)].sub.y wherein B is a moiety of ethyenically unsaturated hydrocarbon of at least 3 carbon atoms and up to 10 carbon atoms and the ratio of y:x is up to about 0.5, in the presence of a catalyst composition formed from a palladium compound, the anion of trifluoroacetic acid and a bidentate phosphine ligand, the improvement which comprises providing the palladium compound and the trifluoroacetate anion as preformed palladium trifluoroacetate.
Claim 5
Dependent Claim
7 words
The process of claim 2 wherein y=0.
Claim 6
Dependent Claim
24 words
The process of claim 2 wherein B is a moiety of propylene and the ratio of y:x is from about 0.01 to about 0.1.
References Cited (Backward Citations)
GB1081304A
Cited
US3689460A
Cited
US3694412A
Cited
US4195184A
Cited
EP0121965A2
Cited
EP0181014A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |