Composite conductive polymer composition, method of manufacturing the same, solution containing the composition, use of the composition

A composite conductive polymer composition obtained by doping a π-conjugated polymer (β) with a water-soluble polymer compound (A);

• wherein
• the polymer compound (A) is obtained by polymerizing the following components (a-1) to (a-3), the sum of the components (a-1) to (a-3) being 100 mol %:
• (a-1) a monomer having a sulfonic acid group and a polymerizable vinyl group in an amount of 20 to 75 mol %,
• (a-2) a polar monomer having a hydrophilic group and a polymerizable vinyl group and not having a sulfonic acid group in an amount of 20 to 80 mol %, and
• (a-3) a polymerizable monomer other than the components (a-1) and (a-2) in an amount of 0 to 19.5 mol %;
• and
• the π-conjugated polymer (β) is obtained from a monomer compound selected from the formulas (I) to (III)
• wherein, in the formulas (I) to (III),
• at least one of R1 to R4 represent a hydroxy group or an alkoxy group having a carbon number of 1 to 6, and the other groups represent a hydrogen atom, a hydroxy group, an alkyl group having a carbon number of 1 to 4, or an alkoxy group having a carbon number of 1 to 6;
• at least one of R5 and R6 represent a hydroxy group or an alkoxy group having a carbon number of 1 to 6, and the other group represents a hydrogen atom, a hydroxy group, an alkyl group having a carbon number of 1 to 4 or an alkoxy group having a carbon number of 1 to 6, or R5 and R6 jointly represent an alkylenedioxy group having a carbon number of 1 to 8;
• R7 represents a hydrogen atom, an alkyl group having a carbon number of 1 to 6, or an aromatic ring group, wherein
• the component (a-2) is a monomer producing a solution whose pH is larger than 5.5 and smaller than 8.0 (5.5<pH<8.0) when the monomer is dissolved in distillated water of pH 7.0 at the room temperature in a concentration of 0.1 mmol/l, and wherein the component (a-2) polar monomer having a hydrophilic group and a polymerizable vinyl group is selected from acrylic acid, methacrylic acid, 2-(methacryloyloxy)ethylsuccinic acid, maleic acid (maleic anhydride), 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, 2-acetoacetoxyethyl (meth)acrylate, methoxyethyl (meth)acrylate, ethoxyethyl (meth)acrylate, butoxyethyl (meth)acrylate, ethylcarbitol (meth)acrylate, methoxytriethyleneglycol (meth)acrylate, methoxypolyethyleneglycol (meth)acrylate, β-(meth)acryloyloxyethyl hydrogen succinate, and N,N-dimethylaminoethyl (meth)acrylate.