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Patent US5218085A successfully refreshed from Google Patents.
US5218085A
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Preparation of high molecular weight carbon monoxide/styrene copolymers
Assignee: Shell USA Inc
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Filing: 1991-11-12
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Granted: 1993-06-08
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Expires: 2011-11-12
Abstract
Abstract Novel polymers of carbon monoxide with styrene and/or with one or more substituted styrenes having a M n >30,000 are prepared by contacting the monomers with a catalyst composition formed from a palladium compound, a strong acid with a pKa less than -3, a nitrogen bidentate ligand, and an organic oxidizing agent.
Inventors
- 👤 Abe W. de Jong
- 👤 Johannes J. Keijsper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:02
CPC Classifications
C; C08; C08G; C08G67/00; C08G67/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
99 words
In a process for the production of a linear alternating polymer of carbon monoxide and styrene, by contacting carbon monoxide and styrene under polymerization conditions in the presence of a liquid reaction diluent and a catalyst composition to form a polymerization mixture, wherein the catalyst composition is formed from a palladium compound, a strong acid, a nitrogen bidentate ligand, and an organic oxidizing agent, the improvement wherein the acid has a pKa of less than -3, the polymerization mixture contains less than 50 ppm by weight water, and the polymer produced has a number average molecular weight above 30,000.
Claim 2
Dependent Claim
99 words
In a process for the production of a linear alternating polymer of carbon monoxide and styrene, by contacting carbon monoxide and styrene under polymerization conditions in the presence of a liquid reaction diluent and a catalyst composition to form a polymerization mixture, wherein the catalyst composition is formed from a palladium compound, a strong acid, a nitrogen bidentate ligand, and an organic oxidizing agent, the improvement wherein the acid has a pKa of less than -3, the polymerization mixture contains less than 50 ppm by weight water, and the polymer produced has a number average molecular weight above 30,000.
Claim 3
Dependent Claim
44 words
The process of claim 1 wherein the nitrogen bidentate ligand has the general formula ##STR3## wherein X and Y represent identical or different organic bridging groups which each contain three or four atoms in the bridge, at least two of which are carbon atoms.
Claim 4
Dependent Claim
14 words
The process of claim 2 wherein the palladium compound is a carboxylic acid salt.
Claim 5
Dependent Claim
20 words
The process of claim 2 wherein, in the bidentate in nitrogen ligand, the bridging groups X and Y are identical.
Claim 6
Dependent Claim
12 words
The process of claim 2 wherein the strong acid is trifluoromethanesulfonic acid.
Claim 7
Dependent Claim
13 words
The process of claim 2 wherein the organic oxidizing agent is a 1,4-quinone.
Claim 8
Dependent Claim
14 words
The process of claim 2 wherein the reaction diluent is a lower aliphatic alcohol.
Claim 9
Dependent Claim
23 words
The process of claim 2 wherein the catalyst composition contains 2.5 to 50 moles of an organic oxidizing agent per mole of palladium.
Claim 10
Dependent Claim
29 words
The process of claim 8 wherein the catalyst composition contains 0.5 to 100 moles nitrogen bidentate ligand and 1 to 100 moles strong acid, each per mole of palladium.
Claim 11
Dependent Claim
38 words
The process of claim 8 wherein the catalyst composition contains 1 to 50 moles nitrogen bidentate ligand, 2 to 50 moles strong acid, and 5 to 25 moles of an organic oxidizing agent, each per mole of palladium.
Claim 12
Dependent Claim
17 words
The process of claim 8 wherein the polymerization mixture contains less than 25 ppm by weight water.
Claim 13
Dependent Claim
31 words
The process of claim 8 wherein the water content of the polymerization mixture is reduced by adding to the mixture a combination of trimethylorthoformiate and para-toluenesulphonic acid as a drying agent.
Claim 14
Dependent Claim
13 words
The process of claim 8 wherein the polymer is a styrene/carbon monoxide polymer.
Claim 15
Dependent Claim
14 words
The process of claim 8 wherein the polymer is a substituted styrene/carbon monoxide polymer.
Claim 16
Dependent Claim
29 words
The process of claim 8 wherein the strong acid of the catalyst composition is selected from the group consisting of tetrafluoroboric acid, hexafluorophosphoric acid, hexafluoroantimonic acid, and hexafluorosilic acid.
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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) | 1996-06-07 | 1996-12-07 | 1997-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-07 | 2000-12-07 | 2001-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-07 | 2004-12-07 | 2005-06-08 | $7700.00 | Window Closed / Lapsed |