Patent ID: 7960499

Claim:
A process for producing a fibrillar conductive polymer comprising a stirring step for stirring with an agitator a liquid mixture containing conductive polymer aggregates and a solvent to obtain the fibrillar conductive polymer with a fibril diameter of not more than 100 nm, wherein the conductive polymer has a weight-average molecular weight of 20,000 to 1,000,000, the liquid mixture is stirred at a shear rate of at least 10,000 s −1 to obtain the fibrillar conductive polymer and the agitator is a high-speed agitator in which a rotary shaft is concentrically provided within a cylindrical agitation vessel and a rotary blade with a slightly smaller diameter than the agitation vessel is attached to the rotary shaft and is rotated at a high speed to stir a liquid mixture so that a cylindrical thin film of the liquid mixture is enlarged on an inner surface of the agitation vessel, and wherein the rotary blade has, on its circumferential side, a porous cylindrical portion having a cylindrical body radially perforated with a large number of small holes.