US5618469A
Expired / Lapsed
US
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Polyaniline-containing solution, articles coated therewith, and methods for the preparation of same
Assignee: Al-Coat Ltd
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Filing: 1995-05-12
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Granted: 1997-04-08
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Expires: 2015-05-12
Abstract
Abstract The invention provides a solution comprising a proton-doped polyaniline in combination with a protonic acid which is a solvent thereof, and an article coated with an optically-transparent, electrically-conductive layer, formed from the solution, and comprising a proton-doped poiyaniline. The invention also provides a method for preparing a processable solution of a proton-doped polyaniline for use in the preparation of electrically-conductive and optically-transparent coatings, comprising oxidatively polymerizing aniline in the presence of a second protonic acid to yield a solid polyaniline; and dissolving the solid polyaniline in the first protonic acid.
Inventors
- 👤 Eli Harlev
- 👤 Tamilla Gulakhmedova
- 👤 Ilya M. Rubinovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:25
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/026; C08G73/0266; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/1343; G02F1/13439; H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/124; H01B1/128
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
62 words
A solution which is liquid at ambient temperature, comprising a proton-doped polyaniline in combination with pyruvic acid which is a protonating agent and which is present in sufficient excess to act as a solvent for said proton-doped polyaniline wherein said solvent consists of pyruvic acid and, optionally, one or more second protonic acids which function as a stabilizer for said proton-doped polyaniline.
Claim 2
Dependent Claim
62 words
A solution which is liquid at ambient temperature, comprising a proton-doped polyaniline in combination with pyruvic acid which is a protonating agent and which is present in sufficient excess to act as a solvent for said proton-doped polyaniline wherein said solvent consists of pyruvic acid and, optionally, one or more second protonic acids which function as a stabilizer for said proton-doped polyaniline.
Claim 3
Dependent Claim
20 words
A solution according to claim 1, wherein said solution has a stability at 5° C. of at least six months.
Claim 4
Dependent Claim
20 words
A solution according to claim 1, wherein said solution has a stability at 5° C. of at least twelve months.
Claim 5
Dependent Claim
30 words
A solution according to claim 1, further comprising a non-conductive polymer selected from the group consisting of poly(methyl methacrylate), cellulose tri-acetate, cellulose acetate, poly(vinyl alcohol), poly(vinyl acetate), and nylon 6,6.
Claim 6
Dependent Claim
65 words
A solution according to claim 1, prepared by a method comprising the steps of: oxidatively polymerizing aniline in the presence of pyruvic acid to yield a solid polyaniline; reacting said solid polyaniline with a base to form an emeraldine base; and dissolving said emeraldine base in pyruvic acid in the presence of a second protonic acid which functions as a stabilizer for dissolved protonated polyaniline.
Claim 7
Dependent Claim
42 words
A solution according to claim 5, in which said second protonic acid is selected from the group consisting of racemic 2-pyrrolidon-5-carboxylic acid, quinolinic acid, maleic acid, itaconic acid, citraconic acid, ketoglutaric acid, taurine, β-hydroxy-4-morpholinepropane sulfonic acid (MOPSO) and 4-morpholinepropane sulfonic acid (MOPS).
Claim 8
Dependent Claim
37 words
A solution which is liquid at 5° C., consisting of a proton-doped polyaniline and pyruvic acid as a protonating agent, wherein pyruvic acid is present in sufficient excess to act as a solvent for said proton-doped polyaniline.
Claim 9
Dependent Claim
37 words
A solution which is liquid at 5° C., consisting of a proton-doped polyaniline and pyruvic acid as a protonating agent, wherein pyruvic acid is present in sufficient excess to act as a solvent for said proton-doped polyaniline.
Claim 10
Dependent Claim
13 words
The solution of claim 1, comprising 1% emeraldine base in said protonic acid.
Claim 11
Dependent Claim
13 words
The solution of claim 7, comprising 1% emeraldine base in said protonic acid.
References Cited (Backward Citations)
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