US5300575A
Expired / Lapsed
US
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Polythiophene dispersions, their production and their use
Assignee: Heraeus Deutschland GmbH and Co KG
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Filing: 1992-12-10
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Granted: 1994-04-05
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Expires: 2012-12-10
Abstract
Abstract The invention relates to dispersions of polythiophenes made up of structural units corresponding to the following formula (* CHEMICAL STRUCTURE *) (I) in which R1 and R2 independently of one another represent hydrogen or a C1-4 alkyl group or, together, form an optionally substituted C1-4 alkylene group, in the presence of polyanions, to the production of these dispersions and to their use for the antistatic treatment of plastic mouldings.
Inventors
- 👤 Friedrich Jonas
- 👤 Werner Krafft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:20
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/124; H01B1/127; C; C08; C08G; C08G61/00; C08G61/12; C08G61/122; C08G61/123; C08G61/126; G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; G03C1/89; H01G; H01G11/00; H01G11/22; H01G11/30; H01G11/48; H01G11/54; H01G11/56; H01G9/00; H01G9/004; H01G9/022; H01G9/025; H01G9/028; H10; H10K; H10K85/00; H10K85/10; H10K85/111; H10K85/113; H10K85/1135; Y; Y02; Y02E; Y02E60/00; Y02E60/13
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
A solution of a polythiophene comprising water or a mixture of water with a water-miscible organic solvent as the dispersing medium, a polythiophene made up of structural units of the formula ##STR17## in which R 1 and R 2 each independently is hydrogen or a C 1-4 alkyl group or, together, form an optionally substituted C 1-4 alkylene group, and a polyanion derived from polystyrene sulfonic acid having a molecular weight in the range from 2,000 to 500,000, the polythiophene having been polymerized in the presence of a polyanion of polystyrene sulfonic acid having a molecular weight in the range from 2,000 to 500,000 by oxidative chemical polymerization.
Claim 2
Dependent Claim
108 words
A solution of a polythiophene comprising water or a mixture of water with a water-miscible organic solvent as the dispersing medium, a polythiophene made up of structural units of the formula ##STR17## in which R 1 and R 2 each independently is hydrogen or a C 1-4 alkyl group or, together, form an optionally substituted C 1-4 alkylene group, and a polyanion derived from polystyrene sulfonic acid having a molecular weight in the range from 2,000 to 500,000, the polythiophene having been polymerized in the presence of a polyanion of polystyrene sulfonic acid having a molecular weight in the range from 2,000 to 500,000 by oxidative chemical polymerization.
Claim 3
Dependent Claim
15 words
A solution of a polythiophene according to claim 1, wherein the dispersing medium comprises water.
Claim 4
Dependent Claim
39 words
A solution of polythiophene according to claim 1, wherein R 1 and R 2 together form an optionally alkyl-substituted methylene group, an optionally C 1 -C 12 -alkyl or phenyl-substituted 1,2-ethylene group, a 1,3-propylene group or a 1,2-cyclohexylene group.
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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) | 1997-04-04 | 1997-10-04 | 1998-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-04 | 2001-10-04 | 2002-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-04 | 2005-10-04 | 2006-04-05 | $7700.00 | Window Closed / Lapsed |