US5294372A
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Aqueous dispersion of intrinsically electroconductive polyalkoxythiophenes, a process for their preparation and their use
Assignee: Hoechst AG
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Filing: 1992-03-18
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Granted: 1994-03-15
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Expires: 2012-03-18
Abstract
Abstract An aqueous dispersion is described which contains electroconductive, doped, polyalkoxythiophene which is soluble in aprotic organic solvents and is insoluble in water. The dispersion has a residual solvent content of less than or equal to 25% by weight, based on the total weight of the dispersion. A process for the preparation of this dispersion and the use of the dispersion for forming coatings on substrates are also described.
Inventors
- 👤 Karl-Heinz Kochem
- 👤 Michael Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:47
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/12; C08G61/122; C08G61/123; C08G61/126; C08G2261/00; C08G2261/10; C08G2261/14; C08G2261/141; C08G2261/1412; C08G2261/30; C08G2261/32; C08G2261/322; C08G2261/3223; Y; Y10; Y10T; Y10T428/00; Y10T428/29
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
45 words
An aqueous dispersion comprising electroconductive, polyalkoxythiophene which is soluble in aprotic organic solvents, said dispersion having a residual organic solvent content of at least about 5% by weight and less than or equal to 25% by weight, based on the total weight of the dispersion.
Claim 2
Dependent Claim
45 words
An aqueous dispersion comprising electroconductive, polyalkoxythiophene which is soluble in aprotic organic solvents, said dispersion having a residual organic solvent content of at least about 5% by weight and less than or equal to 25% by weight, based on the total weight of the dispersion.
Claim 3
Dependent Claim
42 words
A dispersion according to claim 1, wherein said electroconductive polyalkoxythiophene comprises structural units of the formula ##STR2## in which R 1 is a C 1 -C 12 -alkoxy group, and the monomer units are bonded to one another in the 2-and/or 5-position.
Claim 4
Dependent Claim
20 words
A dispersion according to claim 1, additionally containing at least one nonconductive binder which is dispersible or soluble in water.
Claim 5
Dependent Claim
18 words
A dispersion according to claim 2, wherein said R 1 is a C 1 -C 4 -alkoxy group.
Claim 6
Dependent Claim
18 words
A dispersion according to claim 1, wherein said residual organic solvent content is 10 to 20% by weight.
Claim 7
Dependent Claim
13 words
A dispersion according to claim 1, wherein said residual organic solvent is N-methylpyrrolidone.
Claim 8
Dependent Claim
16 words
A dispersion according to claim 1, wherein the water content is 95 to 75% by weight.
Claim 9
Dependent Claim
16 words
A dispersion according to claim 7, wherein said water content is 80 to 90% by weight.
Claim 10
Dependent Claim
35 words
A process for the preparation of a dispersion according to claim 1, comprising the steps of: (a) dissolving the electroconductive polyalkoxythiophene in at least one dipolar, aprotic solvent; and (b) dispersing the solution in water.
Claim 11
Dependent Claim
44 words
A process for the preparation of a dispersion according to claim 3 comprising the steps of: (a) dissolving the electroconductive polyalkoxythiophene in at least one dipolar aprotic solvent; and (b) dispersing or dissolving said binder in said solvent; (c) dispersing the solution in water.
Claim 12
Dependent Claim
64 words
An aqueous dispersion comprising electroconductive, polyalkoxythiophene which is soluble in aprotic organic solvents, said dispersion having a residual organic solvent content of at least about 5% by weight and less than or equal to 25% by weight, a water content of 95 to 75% by weight, and a solids content of 2 to 15% by weight, based on the total weight of the dispersion.
Claim 13
Dependent Claim
64 words
An aqueous dispersion comprising electroconductive, polyalkoxythiophene which is soluble in aprotic organic solvents, said dispersion having a residual organic solvent content of at least about 5% by weight and less than or equal to 25% by weight, a water content of 95 to 75% by weight, and a solids content of 2 to 15% by weight, based on the total weight of the dispersion.
Claim 14
Dependent Claim
18 words
A dispersion according to claim 11, wherein said residual organic solvent content is 10 to 20% by weight.
Claim 15
Dependent Claim
16 words
A dispersion according to claim 11, wherein said solids content is 4 to 8% by weight.
Claim 16
Dependent Claim
16 words
A dispersion according to claim 11, wherein said water content is 80 to 90% by weight.
Claim 17
Dependent Claim
13 words
A dispersion according to claim 11, wherein said residual organic solvent is N-methylpyrrolidone.
Claim 18
Dependent Claim
20 words
A dispersion according to claim 11, additionally containing at least one nonconductive binder which is dispersible or soluble in water.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-03-14 | 1997-09-13 | 1998-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-14 | 2001-09-13 | 2002-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-14 | 2005-09-13 | 2006-03-15 | $7700.00 | Window Closed / Lapsed |