METHOD FOR PRODUCING CONDUCTIVE POLYANILINE

• US 20080217586A1
• Filed: 02/18/2008
• Published: 09/11/2008
• Est. Priority Date: 10/08/2003
• Status: Active Grant

• Current Assignee: Yokohama Rubber Company Limited
• Original Assignee: Yokohama Rubber Company Limited
• Inventors: Sekine, Yuko, Maruyama, Tsukasa
• Granted Patent: US 7,497,975 B2
• Time in Patent Office: Days
• US Class Current: 252/500
• CPC Class Codes: C08G 73/0266 Polyanilines or derivatives thereof
• CPC Class Codes: H01B 1/128 comprising six-membered aromatic rings in the main chain, e.g. polyanilines, polyphenylenes

Abstract

A method for producing a conductive polyaniline comprising oxidative polymerizing aniline or its derivative in the presence of at least one member of a sulfonic acid compound and a water-insoluble organic polymer compound having protonic acid group in a mixed layer composed of an aqueous layer and organic layer, during which it establishes the presence of a molecular weight adjusting agent and, optionally, a phase transfer catalyst so as to stably disperse them in an organic solvent, and an organic polymer composition containing the conductive polyaniline.

Claims

1. An organic polymer composition comprising (I) a conductive polyaniline produced by a method for producing a conductive polyaniline dispersion comprising a stably dispersed conductive polyaniline in an organic solvent, said method comprising the step of oxidative polymerizing aniline or its derivative in the presence of at least one member selected from the group consisting of (i) sulfonic acids and (ii) water-soluble organic polymers having a protonic acid group in an aqueous layer and a water-insoluble organic solvent layer, wherein said polymerization takes place in the presence of an oxidizing agent, a molecular Weight adjust agent and, a phase transfer catalyst and (II) an organic polymer.

2. An organic polymer composition as claimed in claim 1, wherein the amount of the conductive aniline is 0.01 to 100 parts by weight, based upon 100 parts by weight of the organic polymer.

3. An organic polymer composition as claimed in claim 1, wherein the organic polymer is at least one component selected from the group consisting of rubbers, polyolefin resins, polyester resins, polyamide resins, epoxy resins, polyimide resins and fluororesins.

4. A conductive substrate comprising, coated thereon, (A) polyaniline derived from polymerization of aniline or aniline derivative, (B) sulfonic acid and/or (C) an organic polymer having a protonic acid group, (D) a molecular weight adjusting agent and (E) an organic solvent capable of dissolving the sulfonic acid (B), the organic polymer having a protonic acid group (C) and the molecular weight adjusting agent. (D).