# US 5,700,399 A · Soluble alkoxy-group substituted aminobenzenesulfonic acid aniline conducting polymers

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- Number: US 5,700,399 A
- Document ID: US5700399A
- Status: Granted
- Kind: A
- Application number: 08/700,994
- Filed: 1996-08-21
- Granted: 1997-12-23
- Earliest claimed: 1993-12-29
- Assignees: Nitto Chemical Industry Co., Ltd.
- Inventors: Shigeru Shimizu; Takashi Saitoh; Masashi Uzawa; Yasuyuki Takayanagi
- Web page: https://patentgrep.com/patent/US5700399A

## CPC

- H01B 1/128: {comprising six-membered aromatic rings in the main chain, e.g. polyanilines, polyphenylenes}
- C08G 73/0266: {Polyanilines or derivatives thereof}
- Y10T 428/2933: Coated or with bond, impregnation or core
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A soluble aniline conducting polymer characterized in that said conductive polymer comprises as a repeating unit an alkoxyl group-substituted aminobenzenesulfonic acid, its alkali metal salts, ammonium salts and/or substituted ammonium salts, and is a solid having a weight average molecular weight of about 1900 or more at room temperature, a conductive composition and electric conductor comprising the same, and a method for producing a soluble aniline conducting polymer having a weight average molecular weight of 10,000 t 3,240,000 characterized by polymerizing at least one compound (1) selected from the group consisting of an acidic group-substituted aniline, its alkali metal salts, ammonium salts and substituted ammonium salts in a solution containing a basic compound (2) using an oxidizing agent.

## Claims

### Claim 1

An electric conductor comprising a transparent conducting polymer film comprising an aniline conducting polymer (a) which comprises, as a repeating unit, at least one member selected from the group consisting of an alkoxy group-substituted aminobenzenesulfonic acid, an alkali metal salt of alkoxy group-substituted aminobenzenesulfonic acid, an ammonium salt of alkoxy group-substituted aminobenzenesulfonic acid and a substituted ammonium salt of alkoxy group-substituted aminobenzenesulfonic acid in an amount of about 100%, and is a solid having a weight average molecular weight of about 1900 or more at room temperature and being soluble in acidic, basic and neutral aqueous solutions and organic solvents.

### Claim 2 (depends on 1)

An electric conductor according to claim 1, wherein said transparent conducting polymer film contains as an additional component at least one polymer compound (c) selected from the group consisting of a water-soluble polymer compound and a polymer compound which forms an emulsion in an aqueous solution.

### Claim 3 (depends on 1)

An electric conductor according to claim 1, wherein said transparent conducting polymer film contains a surface active agent (e) as an additional component.

### Claim 4 (depends on 2)

An electric conductor according to claim 2, wherein said transparent conducting polymer film contains a surface active agent (e) as an additional component.

### Claim 5

A method for producing an electric conductor comprising:
coating a conductive composition comprising a water-soluble aniline conducting polymer (a) and a solvent (b), said conducting polymer (a) comprising, as a repeating unit, at least one member selected from the group consisting of an alkoxy group-substituted aminobenzenesulfonic acid, an alkali metal salt of alkoxy group-substituted aminobenzenesulfonic acid, an ammonium salt of alkoxy group-substituted aminobenzenesulfonic acid and a substituted ammonium salt of alkoxy group-substituted aminobenzenesulfonic acid in an amount of about 100%, and being a solid having a weight average molecular weight of about 1900 or more at room temperature and being soluble in acidic, basic and neutral aqueous solutions and organic solvents onto at least one surface of a substrate to form a transparent conducting polymer film; and then
allowing the film to stand at room temperature or applying heat-treatment to the film.

### Claim 6 (depends on 5)

A method according to claim 5, wherein said conductive composition contains as an additional component at least one polymer compound (c) selected from the group consisting of a water-soluble polymer compound and a polymer compound which forms an emulsion in an aqueous solution.

### Claim 7 (depends on 5)

A method according to claim 5, wherein said conductive composition contains as an additional component at least one nitrogen-containing compound (d) selected from the group consisting of an amine and a quaternary ammonium salt.

### Claim 8 (depends on 5)

A method according to claim 5, wherein said conductive composition contains a surface active agent (e) as an additional component.

### Claim 9 (depends on 5)

A method according to claim 5, wherein said heat-treatment is carried out in a temperature range of 40.degree. C. to 250.degree. C., thereby removing the components (b) and (d).