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US4468291A
Expired / Lapsed
US
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Continuous production of polypyrrole films
Assignee: BASF SE
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Filing: 1983-06-27
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Granted: 1984-08-28
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Expires: 2003-06-27
Abstract
Abstract Polypyrrole films are produced by electrochemical polymerization of a pyrrole, or a mixture of a pyrrole with other comonomers, in an electrolyte solvent in the presence of a conductive salt, by a continuous process wherein the pyrrole polymer is deposited in the form of a film on anodic material which has a sheet-like structure and is passed continuously through the electrolyte solution. As shown in FIG. 1, this procedure can be carried out in an electrolysis vessel (1) which contains the electrolyte solution (2), a cathode (3) which dips into this solution, and, as the anode, a rotating cylindrical roller (4) which is partially or completely immersed in the electrolyte solution (2); the polypyrrole film (6) is deposited on the anodic surface (5) of the cylindrical roller (4), and is subsequently removed therefrom.
Inventors
- 👤 Herbert Naarmann
- 👤 Gernot Kohler
- 👤 Johannes Schlag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:56
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; C08G61/124; C09; C09D; C09D5/00; C09D5/44; C09D5/4476; C25; C25D; C25D1/00; C25D1/12; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/60; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
62 words
A continuous process for the production of a polypyrrole film, comprising electrochemically polymerizing a pyrrole, or a mixture of a pyrrole with other comonomers, in an electrolyte solvent in the presence of a conductive salt, wherein the polymer is deposited in the form of a film on anodic material which has a sheet-like structure and is passed continuously through the electrolyte solution.
Claim 2
Dependent Claim
62 words
A continuous process for the production of a polypyrrole film, comprising electrochemically polymerizing a pyrrole, or a mixture of a pyrrole with other comonomers, in an electrolyte solvent in the presence of a conductive salt, wherein the polymer is deposited in the form of a film on anodic material which has a sheet-like structure and is passed continuously through the electrolyte solution.
Claim 3
Dependent Claim
17 words
The process of claim 1, wherein the anodic material is in the form of a continuous belt.
Claim 4
Dependent Claim
13 words
The process of claim 1, wherein the anodic material is in segmented form.
Claim 5
Dependent Claim
38 words
The process of claim 1, wherein the anodic material is drawn continuously into the electrolyte solution, transported through this solution while the polymer film is deposited on the anodic material, and then transported out of the solution again.
Claim 6
Dependent Claim
33 words
The process of claim 1, wherein the anodic material constitutes the surface of an endless belt or of a rotating cylinder or cylindrical jacket, from which the resulting polymer film is removed continuously.
Claim 7
Dependent Claim
57 words
The process of claim 4, wherein the anodic material, in the form of a belt, is drawn from a spindle, transported through the electrolyte solution and then transported out of this solution again, the resulting polymer film being left on the anodic material or being removed from this material after it has emerged from the electrolyte solution.
Claim 8
Dependent Claim
23 words
The process of claim 2, wherein the anodic material is coated on the surface, at the long edges, with an electrically insulating material.
Claim 9
Dependent Claim
18 words
The process of claim 1, wherein the cathode employed is in the form of a lattice or net.
Claim 10
Dependent Claim
31 words
The process of claim 1, wherein the electrochemical polymerization is carried out using a voltage of from 1 to 50 volt and a current density of from 0.5 to 100 mA/cm.
Claim 11
Dependent Claim
60 words
The process of claim 1, wherein the conductive salt used is an ionic or ionizable compound containing an anion from the group consisting of BF 4 - , AsF 4 - , AsF 6 - , SbF 6 - , SbCl 6 - , PF 6 - , ClO 4 - , HSO 4 - and SO 4 2- .
Claim 12
Dependent Claim
20 words
The process of claim 1, wherein the conductive salt used is a salt of an unsubstituted or substituted benzenesulfonic 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) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |