JP2012031256A - Conductive polymer solution and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a conductive polymer solution capable of forming a coating film with few bubbles, in which a liquid acrylic compound can uniformly contain a composite containing a π-conjugated conductive polymer and a polyanion without applying ultrafiltration.SOLUTION: The method for manufacturing the conductive polymer solution includes: a freeze-drying step of obtaining a composite solid by freeze-drying the conductive polymer aqueous solution containing the composite that consists of the π-conjugated conductive polymer and the polyanion; and a dispersion step of adding the liquid acrylic compound and an amine compound to the composite solid for dispersed processing.

Description

  The present invention relates to a non-aqueous conductive polymer solution containing a π-conjugated conductive polymer and a method for producing the same.

As a paint for forming a conductive coating film, a conductive polymer aqueous solution in which a π-conjugated conductive polymer such as polythiophene is dissolved in water may be used.
In Patent Document 1, as a method for producing a conductive polymer aqueous solution, 3,4-dialkoxythiophene is chemically oxidatively polymerized using an oxidizing agent in the presence of polystyrene sulfonic acid to produce poly (3,4-dialkoxy). A method for obtaining a (thiophene) aqueous solution has been proposed.
By the way, the conductive polymer aqueous solution as described above has a problem in that the productivity of the conductive coating film is lowered because the drying time becomes longer when the conductive coating film is formed by coating.
In order to shorten the drying time, a conductive polymer solution in which water, which is a solvent of the conductive polymer aqueous solution, is replaced with an organic solvent may be used.
As a method for producing a conductive polymer solution, in Patent Document 2, a conductive polymer aqueous solution to which an amine compound is added is concentrated by ultrafiltration, an organic solvent is added, and a liquid acrylic compound is further added. A method for removing a solvent to obtain a liquid acrylic solution of a conductive polymer is disclosed.

Japanese Patent No. 2636968 JP 2008-115216 A

However, in the method described in Patent Document 2, a complex containing a π-conjugated conductive polymer and a polyanion cannot be uniformly contained in the liquid acrylic compound unless a large amount of organic solvent is used. In addition, when filtration is repeated, the ultrafiltration membrane is clogged, so that maintenance work for the ultrafiltration membrane is required periodically. Therefore, the work tends to be complicated. In addition, since the organic solvent tends to remain, the coating film formed from the liquid acrylic solution of the conductive polymer disclosed in Patent Document 2 tends to contain bubbles, and the appearance tends to be impaired.
Accordingly, the present invention can uniformly contain a complex containing a π-conjugated conductive polymer and a polyanion in a liquid acrylic compound without applying ultrafiltration, and can form a coating film with few bubbles. It aims at providing the manufacturing method of a conductive polymer solution.
Another object of the present invention is to provide a conductive polymer solution in which a complex containing a π-conjugated conductive polymer and a polyanion is uniformly contained in a liquid acrylic compound and can form a coating film with few bubbles. To do.

[1] A freeze-drying step of freeze-drying a conductive polymer aqueous solution containing a complex comprising a π-conjugated conductive polymer and a polyanion to obtain a complex solid, and a liquid acrylic compound and an amine in the complex solid A method for producing a conductive polymer solution, comprising a dispersion step of adding a compound and performing a dispersion treatment.
[2] The method for producing a conductive polymer solution according to [1], wherein in the freeze-drying step, the water content of the composite solid is 3 to 50% by mass.
[3] The method for producing a conductive polymer solution according to [1] or [2], wherein in the freeze-drying step, a specific surface area of the composite solid is 5 to 200 m ² / g.
[4] The method for producing a conductive polymer solution according to any one of [1] to [3], wherein in the dispersion step, the composite is dispersed so that the average particle size of the cumulant is 2000 nm or less. .
[5] The conductive polymer aqueous solution contains one or more conductivity improvers selected from the following compounds (a) to (h): [1] to [4] The manufacturing method of the electroconductive polymer solution of description.
(A) a nitrogen-containing aromatic cyclic compound (b) a compound having two or more hydroxy groups (c) a compound having two or more carboxy groups (d) one or more hydroxy groups and one or more carboxys (E) Compound having an amide group (f) Compound having an imide group (g) Lactam compound (h) Compound having a glycidyl group [6] π-conjugated conductive polymer, polyanion, and liquid acrylic compound A conductive polymer solution containing an amine compound and having a liquid acrylic compound content of 70% by mass or more.

According to the method for producing a conductive polymer solution of the present invention, a composite containing a π-conjugated conductive polymer and a polyanion can be uniformly contained in a liquid acrylic compound without applying ultrafiltration. Thus, a conductive polymer solution capable of forming a coating film with few bubbles can be produced.
In the conductive polymer solution of the present invention, a composite containing a π-conjugated conductive polymer and a polyanion is uniformly contained in a liquid acrylic compound, and a coating film with few bubbles can be formed.

(Conductive polymer solution)
The conductive polymer solution of the present invention contains a π-conjugated conductive polymer, a polyanion, a liquid acrylic compound, and an amine compound.

[Π-conjugated conductive polymer]
The π-conjugated conductive polymer can be used as long as the main chain is an organic polymer having a π-conjugated system. Examples include polypyrroles, polythiophenes, polyacetylenes, polyphenylenes, polyphenylene vinylenes, polyanilines, polyacenes, polythiophene vinylenes, and copolymers thereof. From the viewpoint of easy polymerization and stability in air, polypyrroles, polythiophenes and polyanilines are preferred.
Even if the π-conjugated conductive polymer remains unsubstituted, sufficient conductivity can be obtained. However, in order to further improve the conductivity, an alkyl group, a carboxy group, a sulfo group, an alkoxy group, a hydroxy group, a cyano group, It is preferable to introduce a functional group such as a group into the π-conjugated conductive polymer.

  Specific examples of such π-conjugated conductive polymers include polypyrrole, poly (N-methylpyrrole), poly (3-methylpyrrole), poly (3-ethylpyrrole), and poly (3-n-propylpyrrole). ), Poly (3-butylpyrrole), poly (3-octylpyrrole), poly (3-decylpyrrole), poly (3-dodecylpyrrole), poly (3,4-dimethylpyrrole), poly (3,4 Dibutylpyrrole), poly (3-carboxypyrrole), poly (3-methyl-4-carboxypyrrole), poly (3-methyl-4-carboxyethylpyrrole), poly (3-methyl-4-carboxybutylpyrrole), Poly (3-hydroxypyrrole), poly (3-methoxypyrrole), poly (3-ethoxypyrrole), poly (3-butoxypyrrole), poly 3-hexyloxypyrrole), poly (3-methyl-4-hexyloxypyrrole), poly (3-methyl-4-hexyloxypyrrole), polythiophene, poly (3-methylthiophene), poly (3-ethylthiophene) , Poly (3-propylthiophene), poly (3-butylthiophene), poly (3-hexylthiophene), poly (3-heptylthiophene), poly (3-octylthiophene), poly (3-decylthiophene), poly (3-dodecylthiophene), poly (3-octadecylthiophene), poly (3-bromothiophene), poly (3-chlorothiophene), poly (3-iodothiophene), poly (3-cyanothiophene), poly (3 -Phenylthiophene), poly (3,4-dimethylthiophene), poly (3,4-dibuty) Ruthiophene), poly (3-hydroxythiophene), poly (3-methoxythiophene), poly (3-ethoxythiophene), poly (3-butoxythiophene), poly (3-hexyloxythiophene), poly (3-heptyl) Oxythiophene), poly (3-octyloxythiophene), poly (3-decyloxythiophene), poly (3-dodecyloxythiophene), poly (3-octadecyloxythiophene), poly (3,4-dihydroxythiophene), Poly (3,4-dimethoxythiophene), poly (3,4-diethoxythiophene), poly (3,4-dipropoxythiophene), poly (3,4-dibutoxythiophene), poly (3,4-dihexyl) Oxythiophene), poly (3,4-diheptyloxythiophene), poly (3 4-dioctyloxythiophene), poly (3,4-didecyloxythiophene), poly (3,4-didodecyloxythiophene), poly (3,4-ethylenedioxythiophene), poly (3,4-propylene) Dioxythiophene), poly (3,4-butenedioxythiophene), poly (3-methyl-4-methoxythiophene), poly (3-methyl-4-ethoxythiophene), poly (3-carboxythiophene), poly (3-methyl-4-carboxythiophene), poly (3-methyl-4-carboxyethylthiophene), poly (3-methyl-4-carboxybutylthiophene), polyaniline, poly (2-methylaniline), poly (3 -Isobutylaniline), poly (2-anilinesulfonic acid), poly (3-anilinesulfonic acid), etc. It is below.

  Among them, from one or two selected from polypyrrole, polythiophene, poly (N-methylpyrrole), poly (3-methylthiophene), poly (3-methoxythiophene), and poly (3,4-ethylenedioxythiophene) The (co) polymer is preferably used from the viewpoints of resistance and reactivity. Furthermore, polypyrrole and poly (3,4-ethylenedioxythiophene) are more preferable because they have higher conductivity and improved heat resistance.

[Polyanion]
Examples of the polyanion include a substituted or unsubstituted polyalkylene, a substituted or unsubstituted polyalkenylene, a substituted or unsubstituted polyimide, a substituted or unsubstituted polyamide, and a substituted or unsubstituted polyester having an anionic group. Examples thereof include a polymer composed only of a structural unit, and a polymer composed of a structural unit having an anionic group and a structural unit not having an anionic group.

A polyalkylene is a polymer whose main chain is composed of repeating methylenes.
Polyalkenylene is a polymer composed of structural units containing one unsaturated double bond (vinyl group) in the main chain.
As polyimide, pyromellitic dianhydride, biphenyltetracarboxylic dianhydride, benzophenonetetracarboxylic dianhydride, 2,2 ′-[4,4′-di (dicarboxyphenyloxy) phenyl] propane dianhydride And polyimides from acid anhydrides such as oxydiamine, paraphenylenediamine, metaphenylenediamine, benzophenonediamine and the like.
Examples of the polyamide include polyamide 6, polyamide 6,6, polyamide 6,10 and the like.
Examples of the polyester include polyethylene terephthalate and polybutylene terephthalate.

  When the polyanion has a substituent, examples of the substituent include an alkyl group, a hydroxy group, an amino group, a carboxy group, a cyano group, a phenyl group, a phenol group, an ester group, and an alkoxy group. In consideration of solubility in a liquid acrylic compound, heat resistance, compatibility with a resin, and the like, an alkyl group, a hydroxy group, a phenol group, and an ester group are preferable.

Examples of the alkyl group include alkyl groups such as methyl, ethyl, propyl, butyl, isobutyl, t-butyl, pentyl, hexyl, octyl, decyl, and dodecyl, and cycloalkyl groups such as cyclopropyl, cyclopentyl, and cyclohexyl. It is done.
Examples of the hydroxy group include a hydroxy group bonded to the main chain of the polyanion directly or via another functional group. Examples of the other functional group include an alkyl group having 1 to 7 carbon atoms and an alkyl group having 2 to 7 carbon atoms. An alkenyl group, an amide group, an imide group, etc. are mentioned. Hydroxy groups are substituted at the ends or in these functional groups.
Examples of the amino group include an amino group bonded to the main chain of the polyanion directly or via another functional group. Examples of the other functional group include an alkyl group having 1 to 7 carbon atoms and an alkyl group having 2 to 7 carbon atoms. An alkenyl group, an amide group, an imide group, etc. are mentioned. The amino group is substituted at the end or in these functional groups.
Examples of the phenol group include a phenol group bonded to the main chain of the polyanion directly or via another functional group. Examples of the other functional group include an alkyl group having 1 to 7 carbon atoms and an alkyl group having 2 to 7 carbon atoms. An alkenyl group, an amide group, an imide group, etc. are mentioned. The phenol group is substituted at the end or in these functional groups.

Examples of the polyalkylene having a substituent include polyethylene, polypropylene, polybutene, polypentene, polyhexene, polyvinyl alcohol, polyvinylphenol, poly (3,3,3-trifluoropropylene), polyacrylonitrile, polyacrylate, polystyrene and the like. it can.
Specific examples of polyalkenylene include propenylene, 1-methylpropenylene, 1-butylpropenylene, 1-decylpropenylene, 1-cyanopropenylene, 1-phenylpropenylene, 1-hydroxypropenylene, 1-butenylene, 1-methyl-1-butenylene, 1-ethyl-1-butenylene, 1-octyl-1-butenylene, 1-pentadecyl-1-butenylene, 2-methyl-1-butenylene, 2-ethyl-1-butenylene, 2- Butyl-1-butenylene, 2-hexyl-1-butenylene, 2-octyl-1-butenylene, 2-decyl-1-butenylene, 2-dodecyl-1-butenylene, 2-phenyl-1-butenylene, 2-butenylene, 1-methyl-2-butenylene, 1-ethyl-2-butenylene, 1-octyl-2-butenylene 1-pentadecyl-2-butenylene, 2-methyl-2-butenylene, 2-ethyl-2-butenylene, 2-butyl-2-butenylene, 2-hexyl-2-butenylene, 2-octyl-2-butenylene, 2- Decyl-2-butenylene, 2-dodecyl-2-butenylene, 2-phenyl-2-butenylene, 2-propylenephenyl-2-butenylene, 3-methyl-2-butenylene, 3-ethyl-2-butenylene, 3-butyl 2-butenylene, 3-hexyl-2-butenylene, 3-octyl-2-butenylene, 3-decyl-2-butenylene, 3-dodecyl-2-butenylene, 3-phenyl-2-butenylene, 3-propylenephenyl- 2-butenylene, 2-pentenylene, 4-propyl-2-pentenylene, 4-propyl-2-pentenylene, 4- Tyl-2-pentenylene, 4-hexyl-2-pentenylene, 4-cyano-2-pentenylene, 3-methyl-2-pentenylene, 4-ethyl-2-pentenylene, 3-phenyl-2-pentenylene, 4-hydroxy- Examples thereof include polymers containing one or more structural units selected from 2-pentenylene, hexenylene and the like.

Examples of the anion group of the _{^{polyanion, -O-SO 3 - X +}} , -SO 3 - X +, -COO - X + (. X + is the hydrogen ion in each of the formulas, represents an alkali metal ion), and the like.
That is, the polyanion is a polymer acid containing a sulfo group and / or a carboxy group. Among these, from the viewpoint of doping effects on the π-conjugated conductive _{^{polymer, -SO 3 - X +, -COO}} - X + are preferable.
Moreover, it is preferable that this anion group is arrange | positioned to the principal chain of a polyanion adjacently or at regular intervals.

  Among the polyanions, polyisoprenesulfonic acid, a copolymer containing polyisoprenesulfonic acid, a polysulfoethyl methacrylate, a copolymer containing polysulfoethyl methacrylate, poly (4 -Sulfobutyl methacrylate), copolymers containing poly (4-sulfobutyl methacrylate), polymethallyloxybenzenesulfonic acid, copolymers containing polymethallyloxybenzenesulfonic acid, polystyrenesulfonic acid, polystyrenesulfonic acid A copolymer or the like is preferred.

  The degree of polymerization of the polyanion is preferably in the range of 10 to 100,000 monomer units, and more preferably in the range of 50 to 10,000 from the viewpoint of solvent solubility and conductivity.

  The content of the polyanion is preferably in the range of 0.1 to 10 mol, and more preferably in the range of 1 to 7 mol, with respect to 1 mol of the π-conjugated conductive polymer. When the polyanion content is less than 0.1 mol, the doping effect on the π-conjugated conductive polymer tends to be weak, and the conductivity may be insufficient. In addition, the dispersibility and solubility in the solvent are lowered, making it difficult to obtain a uniform dispersion. On the other hand, when the polyanion content is more than 10 mol, the content of the π-conjugated conductive polymer is decreased, and it is difficult to obtain sufficient conductivity.

The polyanion is coordinated to the π-conjugated conductive polymer. Therefore, the π-conjugated conductive polymer and the polyanion form a complex.
The total content of the π-conjugated conductive polymer and the polyanion is preferably 0.05 to 5.0% by mass when the total solid content is 100% by mass, and 0.5 to 4.0% by mass. % Is more preferable. When the total content of the π-conjugated conductive polymer and the polyanion is less than 0.05% by mass, sufficient conductivity may not be obtained. When the content exceeds 5.0% by mass, uniform conductivity is obtained. A coating film may not be obtained.

[Conductivity improver]
The conductive polymer solution preferably contains one or more conductivity improvers selected from the following compounds (a) to (h) that improve the conductivity of the resulting conductive coating film.
(A) a nitrogen-containing aromatic cyclic compound (b) a compound having two or more hydroxy groups (c) a compound having two or more carboxy groups (d) one or more hydroxy groups and one or more carboxys (E) Compound having amide group (f) Compound having imide group (g) Lactam compound (h) Compound having glycidyl group

(A) Nitrogen-containing aromatic cyclic compound Examples of the nitrogen-containing aromatic cyclic compound include pyridines and derivatives thereof containing one nitrogen atom, imidazoles and derivatives thereof containing two nitrogen atoms, Examples include pyrimidines and derivatives thereof, pyrazines and derivatives thereof, triazines containing three nitrogen atoms, and derivatives thereof. From the viewpoint of solvent solubility and the like, pyridines and derivatives thereof, imidazoles and derivatives thereof, and pyrimidines and derivatives thereof are preferable.

  Specific examples of pyridines and derivatives thereof include pyridine, 2-methylpyridine, 3-methylpyridine, 4-methylpyridine, 4-ethylpyridine, N-vinylpyridine, 2,4-dimethylpyridine, 2,4. , 6-trimethylpyridine, 3-cyano-5-methylpyridine, 2-pyridinecarboxylic acid, 6-methyl-2-pyridinecarboxylic acid, 4-pyridinecarboxaldehyde, 4-aminopyridine, 2,3-diaminopyridine, 2 , 6-diaminopyridine, 2,6-diamino-4-methylpyridine, 4-hydroxypyridine, 4-pyridinemethanol, 2,6-dihydroxypyridine, 2,6-pyridinedimethanol, methyl 6-hydroxynicotinate, 2 -Hydroxy-5-pyridinemethanol, ethyl 6-hydroxynicotinate, 4-pi Lysine methanol, 4-pyridineethanol, 2-phenylpyridine, 3-methylquinoline, 3-ethylquinoline, quinolinol, 2,3-cyclopentenopyridine, 2,3-cyclohexanopyridine, 1,2-di (4- Pyridyl) ethane, 1,2-di (4-pyridyl) propane, 2-pyridinecarboxaldehyde, 2-pyridinecarboxylic acid, 2-pyridinecarbonitrile, 2,3-pyridinedicarboxylic acid, 2,4-pyridinedicarboxylic acid, Examples include 2,5-pyridinedicarboxylic acid, 2,6-pyridinedicarboxylic acid, and 3-pyridinesulfonic acid.

  Specific examples of imidazoles and derivatives thereof include imidazole, 2-methylimidazole, 2-propylimidazole, 2-undecylimidazole, 2-phenylimidazole, N-methylimidazole, N-vinylimidazole, and N-allylimidazole. 1- (2-hydroxyethyl) imidazole (N-hydroxyethylimidazole), 2-ethyl-4-methylimidazole, 1,2-dimethylimidazole, 1-benzyl-2-methylimidazole, 1-benzyl-2-phenyl Imidazole, 1-cyanoethyl-2-methylimidazole, 1-cyanoethyl-2-ethyl-4-methylimidazole, 2-phenyl-4,5-dihydroxymethylimidazole, 1-acetylimidazole, 4,5-imidazoledicarbo Acid, dimethyl 4,5-imidazole dicarboxylate, benzimidazole, 2-aminobenzimidazole, 2-aminobenzimidazole-2-sulfonic acid, 2-amino-1-methylbenzimidazole, 2-hydroxybenzimidazole , 2- (2-pyridyl) benzimidazole and the like.

  Specific examples of pyrimidines and derivatives thereof include 2-amino-4-chloro-6-methylpyrimidine, 2-amino-6-chloro-4-methoxypyrimidine, 2-amino-4,6-dichloropyrimidine, 2-amino-4,6-dihydroxypyrimidine, 2-amino-4,6-dimethylpyrimidine, 2-amino-4,6-dimethoxypyrimidine, 2-aminopyrimidine, 2-amino-4-methylpyrimidine, 4,6 -Dihydroxypyrimidine, 2,4-dihydroxypyrimidine-5-carboxylic acid, 2,4,6-triaminopyrimidine, 2,4-dimethoxypyrimidine, 2,4,5-trihydroxypyrimidine, 2,4-pyrimidinediol, etc. Is mentioned.

  Specific examples of the pyrazines and derivatives thereof include pyrazine, 2-methylpyrazine, 2,5-dimethylpyrazine, pyrazinecarboxylic acid, 2,3-pyrazinedicarboxylic acid, 5-methylpyrazinecarboxylic acid, pyrazineamide, 5 -Methylpyrazine amide, 2-cyanopyrazine, aminopyrazine, 3-aminopyrazine-2-carboxylic acid, 2-ethyl-3-methylpyrazine, 2,3-dimethylpyrazine, 2,3-diethylpyrazine and the like.

  Specific examples of triazines and derivatives thereof include 1,3,5-triazine, 2-amino-1,3,5-triazine, 3-amino-1,2,4-triazine, and 2,4-diamino. -6-phenyl-1,3,5-triazine, 2,4,6-triamino-1,3,5-triazine, 2,4,6-tris (trifluoromethyl) -1,3,5-triazine, 2,4,6-tri-2-pyridine-1,3,5-triazine, 3- (2-pyridine) -5,6-bis (4-phenylsulfonic acid) -1,2,4-triazine disodium 3- (2-pyridine) -5,6-diphenyl-1,2,4-triazine, 3- (2-pyridine) -5,6-diphenyl-1,2,4-triazine-ρ, ρ′- Disodium disulphonate, 2-hydroxy-4,6-dichloro -1,3,5-triazine and the like.

  The content of the nitrogen-containing aromatic cyclic compound is preferably in the range of 0.1 to 100 mol, more preferably in the range of 0.5 to 30 mol, with respect to 1 mol of the anion group unit of the polyanion. The range of 1 to 10 mol is particularly preferable from the viewpoint of conductivity. When the content of the nitrogen-containing aromatic cyclic compound is less than 0.1 mol, the interaction between the nitrogen-containing aromatic cyclic compound, the polyanion and the conjugated conductive polymer tends to be weak, and the conductivity May be insufficient. Further, when the nitrogen-containing aromatic cyclic compound is contained in an amount exceeding 100 mol, the content of the conjugated conductive polymer is decreased, and it is difficult to obtain sufficient conductivity.

(B) Compound having two or more hydroxy groups Examples of the compound having two or more hydroxy groups include propylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, glycerin, diglycerin, D- Glucose, D-glucitol, isoprene glycol, dimethylolpropionic acid, butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,9-nonanediol, neopentyl glycol, trimethylolethane, trimethylolpropane, Polyhydric aliphatic alcohols such as pentaerythritol, dipentaerythritol, thiodiethanol, glucose, tartaric acid, D-glucaric acid, glutaconic acid;
Polymeric alcohols such as cellulose, polysaccharides, sugar alcohols;
1,4-dihydroxybenzene, 1,3-dihydroxybenzene, 2,3-dihydroxy-1-pentadecylbenzene, 2,4-dihydroxyacetophenone, 2,5-dihydroxyacetophenone, 2,4-dihydroxybenzophenone, 2,6 -Dihydroxybenzophenone, 3,4-dihydroxybenzophenone, 3,5-dihydroxybenzophenone, 2,4'-dihydroxydiphenylsulfone, 2,2 ', 5,5'-tetrahydroxydiphenylsulfone, 3,3', 5,5 '-Tetramethyl-4,4'-dihydroxydiphenylsulfone, hydroxyquinonecarboxylic acid and its salts, 2,3-dihydroxybenzoic acid, 2,4-dihydroxybenzoic acid, 2,5-dihydroxybenzoic acid, 2,6- Dihydroxybenzoic acid, 3,5-di Droxybenzoic acid, 1,4-hydroquinonesulfonic acid and its salts, 4,5-hydroxybenzene-1,3-disulfonic acid and its salts, 1,5-dihydroxynaphthalene, 1,6-dihydroxynaphthalene, 2,6- Dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 2,3-dihydroxynaphthalene, 1,5-dihydroxynaphthalene-2,6-dicarboxylic acid, 1,6-dihydroxynaphthalene-2,5-dicarboxylic acid, 1,5-dihydroxy Naphthoic acid, 1,4-dihydroxy-2-naphthoic acid phenyl ester, 4,5-dihydroxynaphthalene-2,7-disulfonic acid and its salts, 1,8-dihydroxy-3,6-naphthalenedisulfonic acid and its salts, 6,7-Dihydroxy-2-naphthalenesulfonic acid and its 1,2,3-trihydroxybenzene (pyrogallol), 1,2,4-trihydroxybenzene, 5-methyl-1,2,3-trihydroxybenzene, 5-ethyl-1,2,3-tri Hydroxybenzene, 5-propyl-1,2,3-trihydroxybenzene, trihydroxybenzoic acid, trihydroxyacetophenone, trihydroxybenzophenone, trihydroxybenzaldehyde, trihydroxyanthraquinone, 2,4,6-trihydroxybenzene, tetra Aromatic compounds such as hydroxy-p-benzoquinone, tetrahydroxyanthraquinone, methyl garlic acid (methyl gallate), ethyl garlic acid (ethyl gallate), potassium hydroquinone sulfonate, and the like.

  The content of the compound having two or more hydroxy groups is preferably in the range of 0.05 to 50 mol and more preferably in the range of 0.3 to 10 mol with respect to 1 mol of the anion group unit of the polyanion. More preferred. If the content of the compound having two or more hydroxy groups is less than 0.05 mol with respect to 1 mol of the anion group unit of the polyanion, conductivity and heat resistance may be insufficient. In addition, when the content of the compound having two or more hydroxy groups is more than 50 mol with respect to 1 mol of the anion group unit of the polyanion, the content of the π-conjugated conductive polymer in the obtained conductive coating film As a result, it is difficult to obtain sufficient conductivity.

(C) Compound having two or more carboxy groups As a compound having two or more carboxy groups, maleic acid, fumaric acid, itaconic acid, citraconic acid, malonic acid, 1,4-butanedicarboxylic acid, succinic acid, Aliphatic carboxylic acid compounds such as tartaric acid, adipic acid, D-glucaric acid, glutaconic acid, citric acid;
Phthalic acid, terephthalic acid, isophthalic acid, tetrahydrophthalic anhydride, 5-sulfoisophthalic acid, 5-hydroxyisophthalic acid, methyltetrahydrophthalic anhydride, 4,4'-oxydiphthalic acid, biphenyltetracarboxylic dianhydride, benzophenone tetra Aromatic carboxylic acid compounds in which at least one carboxy group is bonded to an aromatic ring, such as carboxylic dianhydride, naphthalene dicarboxylic acid, trimellitic acid, pyromellitic acid; diglycolic acid, oxydibutyric acid Thiodiacetic acid (thiodiacetic acid), thiodibutyric acid, iminodiacetic acid, iminobutyric acid and the like.

  The compound having two or more carboxy groups is preferably in the range of 0.1 to 30 mol, more preferably in the range of 0.3 to 10 mol, relative to 1 mol of the anion group unit of the polyanion. When the content of the compound having two or more carboxy groups is less than 0.1 mol relative to 1 mol of the anion group unit of the polyanion, conductivity and heat resistance may be insufficient. In addition, when the content of the compound having two or more carboxy groups is more than 30 mol with respect to 1 mol of the anion group unit of the polyanion, the content of the π-conjugated conductive polymer in the conductive coating film decreases. After all, it is difficult to obtain sufficient conductivity.

(D) Compound having one or more hydroxy groups and one or more carboxy groups Examples of the compound having one or more hydroxy groups and one or more carboxy groups include tartaric acid, glyceric acid, dimethylolbutanoic acid and dimethylol. Examples include propanoic acid, D-glucaric acid, and glutaconic acid.

  The content of the compound having one or more hydroxy groups and one or more carboxy groups is preferably 1 to 5,000 parts by mass with respect to 100 parts by mass in total of the polyanion and the π-conjugated conductive polymer. 50 to 500 parts by mass is more preferable. When the content of the compound having one or more hydroxy groups and one or more carboxy groups is less than 1 part by mass, conductivity and heat resistance may be insufficient. In addition, when the content of the compound having one or more hydroxy groups and one or more carboxy groups exceeds 5,000 parts by mass, the content of the π-conjugated conductive polymer in the conductive coating film decreases. Again, it is difficult to obtain sufficient conductivity.

(E) Amide compound The compound having an amide group is a monomolecular compound having an amide bond represented by -CO-NH- (wherein CO is a double bond) in the molecule. That is, as the amide compound, for example, a compound having functional groups at both ends of the bond, a compound in which a cyclic compound is bonded to one end of the bond, urea and urea derivatives in which the functional groups at both ends are hydrogen Etc.
Specific examples of amide compounds include acetamide, malonamide, succinamide, maleamide, fumaramide, benzamide, naphthamide, phthalamide, isophthalamide, terephthalamide, nicotinamide, isonicotinamide, 2-fluamide, formamide, N-methylformamide, propionamide , Propioluamide, butyramide, isobutylamide, methacrylamide, palmitoamide, stearylamide, oleamide, oxamide, glutaramide, adipamide, cinnamamide, glycolamide, lactamide, glyceramide, tartaramide, citrulamide, glyoxylamide, pyruvamide, acetoacetamide, dimethyl Acetamide, benzylamide, anthranilamide, ethylenediamine Laacetamide, diacetamide, triacetamide, dibenzamide, tribenzamide, rhodanine, urea, 1-acetyl-2-thiourea, biuret, butylurea, dibutylurea, 1,3-dimethylurea, 1,3-diethylurea and These derivatives are mentioned.

  Moreover, acrylamide can also be used as an amide compound. As acrylamide, N-methylacrylamide, N-methylmethacrylamide, N-ethylacrylamide, N-ethylmethacrylamide, N, N-dimethylacrylamide, N, N-dimethylmethacrylamide, N, N-diethylacrylamide, N, Examples thereof include N-diethyl methacrylamide, 2-hydroxyethyl acrylamide, 2-hydroxyethyl methacrylamide, N-methylol acrylamide, N-methylol methacrylamide and the like.

  The molecular weight of the amide compound is preferably 46 to 10,000, more preferably 46 to 5,000, and particularly preferably 46 to 1,000.

  The content of the amide compound is preferably 1 to 5,000 parts by mass and more preferably 50 to 500 parts by mass with respect to 100 parts by mass in total of the polyanion and the π-conjugated conductive polymer. When the content of the amide compound is less than 1 part by mass, conductivity and heat resistance may be insufficient. On the other hand, when the content of the amide compound exceeds 5,000 parts by mass, the content of the π-conjugated conductive polymer in the conductive coating film decreases, and it is difficult to obtain sufficient conductivity.

(F) Imide Compound As the amide compound, a monomolecular compound having an imide bond (hereinafter referred to as an imide compound) is preferable because of higher conductivity. Examples of the imide compound include phthalimide and phthalimide derivatives, succinimide and succinimide derivatives, benzimide and benzimide derivatives, maleimide and maleimide derivatives, naphthalimide and naphthalimide derivatives from the skeleton.

Moreover, although an imide compound is classified into an aliphatic imide, an aromatic imide, etc. by the kind of functional group of both terminal, an aliphatic imide is preferable from a soluble viewpoint.
Furthermore, the aliphatic imide compound is classified into a saturated aliphatic imide compound having an unsaturated bond between carbons in the molecule and an unsaturated aliphatic imide compound having an unsaturated bond between carbons in the molecule.
The saturated aliphatic imide compound is a compound represented by R ¹ —CO—NH—CO—R ² , and is a compound in which both R ¹ and R ² are saturated hydrocarbons. Specifically, cyclohexane-1,2-dicarboximide, allantoin, hydantoin, barbituric acid, alloxan, glutarimide, succinimide, 5-butylhydantoic acid, 5,5-dimethylhydantoin, 1-methylhydantoin, 1,5 , 5-trimethylhydantoin, 5-hydantoin acetic acid, N-hydroxy-5-norbornene-2,3-dicarboximide, semicarbazide, α, α-dimethyl-6-methylsuccinimide, bis [2- (succinimidooxycarbonyloxy) Ethyl] sulfone, α-methyl-α-propylsuccinimide, cyclohexylimide and the like.
The unsaturated aliphatic imide compound is a compound represented by R ¹ —CO—NH—CO—R ² , and one or both of R ¹ and R ² are one or more unsaturated bonds. Specific examples are 1,3-dipropylene urea, maleimide, N-methylmaleimide, N-ethylmaleimide, N-hydroxymaleimide, 1,4-bismaleimide butane, 1,6-bismaleimide hexane, 1,8-bis. Maleimide octane, N-carboxyheptylmaleimide and the like can be mentioned.

  The molecular weight of the imide compound is preferably 60 to 5,000, more preferably 70 to 1,000, and particularly preferably 80 to 500.

  The content of the imide compound is preferably 10 to 10,000 parts by mass, more preferably 50 to 5,000 parts by mass with respect to 100 parts by mass in total of the π-conjugated conductive polymer and the polyanion. . If the addition amount of the amide compound and the imide compound is less than the lower limit, the effect of the addition of the amide compound and the imide compound is lowered, which is not preferable. Moreover, when the said upper limit is exceeded, since the electroconductive fall resulting from the fall of (pi) conjugated system conductive polymer concentration will occur, it is unpreferable.

(G) Lactam Compound A lactam compound is an intramolecular cyclic amide of an aminocarboxylic acid, and a part of the ring is —CO—NR— (R is hydrogen or an arbitrary substituent). However, one or more carbon atoms in the ring may be replaced with an unsaturated or heteroatom.
Examples of the lactam compound include pentano-4-lactam, 4-pentanelactam-5-methyl-2-pyrrolidone, 5-methyl-2-pyrrolidinone, hexano-6-lactam, 6-hexane lactam and the like.

  The content of the lactam compound is preferably 10 to 10,000 parts by mass, and more preferably 50 to 5000 parts by mass with respect to 100 parts by mass in total of the π-conjugated conductive polymer and the polyanion. If the amount of the lactam compound added is less than the lower limit, the effect of the addition of the lactam compound is reduced, which is not preferable. Moreover, when the said upper limit is exceeded, since the electroconductive fall resulting from the fall of (pi) conjugated system conductive polymer concentration will occur, it is unpreferable.

(H) Compound having glycidyl group As the compound having glycidyl group, for example, ethyl glycidyl ether, butyl glycidyl ether, t-butyl glycidyl ether, allyl glycidyl ether, benzyl glycidyl ether, glycidyl phenyl ether, bisphenol A, diglycidyl ether And glycidyl compounds such as glycidyl acrylate and glycidyl methacrylate.

  The content of the compound having a glycidyl group is preferably 10 to 10,000 parts by mass, and more preferably 50 to 5000 parts by mass with respect to 100 parts by mass in total of the π-conjugated conductive polymer and the polyanion. When the amount of the compound having a glycidyl group is less than the lower limit, the effect of adding the compound having a glycidyl group is undesirably reduced. Moreover, when the said upper limit is exceeded, since the electroconductive fall resulting from the fall of (pi) conjugated system conductive polymer concentration will occur, it is unpreferable.

[Liquid acrylic compound]
Examples of liquid acrylic compounds include bisphenol A / ethylene oxide-modified diacrylate, dipentaerythritol hexa (penta) acrylate, dipentaerythritol monohydroxypentaacrylate, dipropylene glycol diacrylate, trimethylolpropane triacrylate, and glycerin propoxytriacrylate. 4-hydroxybutyl acrylate, 1,6-hexanediol diacrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, isobornyl acrylate, polyethylene glycol diacrylate, pentaerythritol triacrylate, tetrahydrofurfuryl acrylate, trimethylol Propane triacrylate, tripropylene glycol dia Acrylates such as relate, tetraethylene glycol dimethacrylate, alkyl methacrylate, allyl methacrylate, 1,3-butylene glycol dimethacrylate, n-butyl methacrylate, benzyl methacrylate, cyclohexyl methacrylate, diethylene glycol dimethacrylate, 2-ethylhexyl methacrylate, glycidyl methacrylate, 1,6-hexanediol dimethacrylate, 2-hydroxyethyl methacrylate, isobornyl methacrylate, lauryl methacrylate, phenoxyethyl methacrylate, t-butyl methacrylate, tetrahydrofurfuryl methacrylate, methacrylates such as trimethylolpropane trimethacrylate, diacetone acrylamide , N, N-di Tylacrylamide, dimethylaminopropylacrylamide, dimethylaminopropylmethacrylamide, methacrylamide, N-methylolacrylamide, N, N-dimethylacrylamide, acryloylmorpholine, N-vinylformamide, N-methylacrylamide, N-isopropylacrylamide, Nt -Acrylic (methacrylic) amides such as butyl acrylamide, N-phenyl acrylamide, acryloyl piperidine and 2-hydroxyethyl acrylamide.
These liquid acrylic compounds may be used individually by 1 type, and may use 2 or more types together.
The liquid acrylic compound is polymerized after application and becomes a part of the obtained conductive coating film.

  The amount of the π-conjugated conductive polymer with respect to 100% by mass of the liquid acrylic compound is preferably 0.01 to 3.0% by mass. If the amount of the π-conjugated conductive polymer relative to the liquid acrylic compound is 0.01% by mass or more, the content of the π-conjugated conductive polymer in the conductive coating can be sufficiently secured. If it can be increased and is 3.0% by mass or less, the dispersibility of the π-conjugated conductive polymer in the conductive polymer solution can be further increased.

  The liquid acrylic compound content in the conductive polymer solution is 70% by mass or more, and preferably 75% by mass or more. When the liquid acrylic compound content is less than 70% by mass, it becomes difficult to uniformly contain the composite, and it becomes difficult to form a coating film with few bubbles.

[Amine compound]
The amine compound is not limited as long as it is coordinated or bonded to the anion group of the polyanion. Here, the coordination or bond is a bond form in which the polyanion and the amine compound donate / accept electrons to each other, thereby reducing the intermolecular distance.
Examples of amine compounds include primary amines, secondary amines, tertiary amines, and aromatic amines.
Examples of the primary amine include monomethylamine, monoethylamine, monopropylamine, monobutylamine, monopentylamine, monohexylamine, monoheptylamine, monooctylamine, monodecylamine, monoundecylamine, monododecylamine, And monostearylamine.
Examples of the secondary amine include dimethylamine, diethylamine, dipropylamine, dibutylamine, dipentylamine, dihexylamine, diheptylamine, dioctylamine, didecylamine, diundecylamine, didodecylamine and the like.
Examples of tertiary amines include trimethylamine, triethylamine, tripropylamine, tributylamine, tripentylamine, trihexylamine, triheptylamine, trioctylamine, tridecylamine, triundecylamine, tridodecylamine, triphenyl. Examples include amine, tribenzylamine, triperfluoropropylamine, triperfluorobutylamine, triethanolamine, and triisopropanolamine.
Examples of the aromatic amine include imidazole, N-methyl-imidazole, N-ethyl-imidazole, N-propyl-imidazole, N-butyl-imidazole, N-pentyl-imidazole, N-hexyl-imidazole, N-heptyl- Examples include imidazole, N-octyl-imidazole, N-decyl-imidazole, N-undecyl-imidazole, N-dodecyl-imidazole, 2-heptyl-imidazole, pyridine and the like.
Among the above, tertiary amines are preferred because the influence on conductivity of π-conjugated conductive polymer (de-doping due to alkalinity) is small.
The molecular weight of the amine compound is preferably 50 to 2000 in consideration of solubility in the liquid acrylic compound.

The amount of the amine compound is preferably 0.1 to 10 molar equivalents relative to the polyanion, more preferably 0.5 to 2.0 molar equivalents, and 0.85 to 1.25 molar equivalents. It is particularly preferred.
If the amount of the amine compound is equal to or more than the lower limit, the amine compound coordinates to almost all of the anion groups of the polyanion, so that the solubility of the π-conjugated conductive polymer in the liquid acrylic compound becomes higher. Moreover, if it is below the said upper limit, since an excess amine compound is not contained in a conductive polymer solution, the fall of the electroconductivity and mechanical property of the conductive film obtained can be prevented.

[Organic solvent content]
The conductive polymer solution of the present invention preferably has an organic solvent content of 30% by mass or less, more preferably 25% by mass or less, and most preferably 20% by mass. When the organic solvent content exceeds 1% by mass, bubbles tend to enter the coating film formed from the conductive polymer solution, and the appearance of the coating film tends to be impaired.
Examples of the organic solvent include alcohols such as methanol, ethanol, isopropanol, N-methyl-2-pyrrolidone, N-methylacetamide, N, N-dimethylformamide, N, N-dimethylacetamide, dimethyl sulfoxide, hexamethylenephospho Polar solvents such as rutriamide, N-vinylpyrrolidone, N-vinylformamide, N-vinylacetamide, phenols such as cresol, phenol, xylenol, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, 1, 3-butylene glycol, 1,4-butylene glycol, glycerin, diglycerin, D-glucose, D-glucitol, isoprene glycol, butanediol, 1,5-pen Diol, 1,6-hexanediol, 1,9-nonanediol, polyhydric aliphatic alcohols such as neopentyl glycol, carbonate compounds such as ethylene carbonate and propylene carbonate, ether compounds such as dioxane and diethyl ether, dialkyl ethers, Chain ethers such as propylene glycol dialkyl ether, polyethylene glycol dialkyl ether, polypropylene glycol dialkyl ether, heterocyclic compounds such as 3-methyl-2-oxazolidinone, acetonitrile, glutaronitrile, methoxyacetonitrile, propionitrile, benzonitrile, etc. Nitrile compounds and the like. The liquid acrylic compound is not included in the organic solvent.
According to the method for producing a conductive polymer solution of the present invention described later, the organic solvent content can be easily reduced to 20% by mass or less.

[how to use]
The conductive polymer solution is used by being applied to a substrate. Here, as the substrate, for example, a resin film, a glass plate, or the like is used, but a resin film is preferable because of its high transparency and flexibility.
Examples of the resin material constituting the resin film include polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyvinyl alcohol, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyacryl, polycarbonate, polyvinylidene fluoride, polyarylate, and styrene. Examples include elastomers, polyester-based elastomers, polyethersulfone, polyetherimide, polyetheretherketone, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, cellulose triacetate, and cellulose acetate propionate. Among these resin materials, polyethylene terephthalate is preferable from the viewpoint of strength and the like.
As the application method, for example, comma coating, reverse coating, lip coating, micro gravure coating, etc. are applied.

It is preferable to perform a curing treatment after the application of the conductive polymer solution.
As the curing method, heating or light irradiation is applied. As a heating method, for example, a normal method such as hot air heating or infrared heating can be employed. Moreover, when hardening by light irradiation, the method of irradiating an ultraviolet-ray from light sources, such as an ultrahigh pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a xenon arc, a metal halide lamp, can be employ | adopted, for example.
Since the liquid acrylic compound is cured by the curing treatment, drying is not necessary after the application of the conductive polymer solution of the present invention.

(Method for producing conductive polymer solution)
The method for producing a conductive polymer solution of the present invention is a method for obtaining a liquid acrylic solution of a conductive polymer from a conductive polymer aqueous solution, and a method having a freeze-drying step and a dispersion step.

[Conductive polymer aqueous solution]
The aqueous conductive polymer solution used in the production method of the present invention contains a complex composed of a π-conjugated conductive polymer and a polyanion and water.
The aqueous conductive polymer solution is prepared, for example, by the following method.
That is, first, a polyanion is dispersed or dissolved in water, and a precursor monomer that forms a π-conjugated conductive polymer is added to the resulting solution to obtain a monomer dispersion. Next, an oxidizing agent is added to the monomer dispersion to polymerize the precursor monomer, and then the excess oxidizing agent and unreacted monomers are removed and purified to obtain a conductive polymer aqueous solution.

[Freeze drying process]
In the lyophilization process, the conductive polymer aqueous solution is lyophilized to obtain a composite solid. In lyophilization, water is frozen and vacuum dried. According to such a drying method, the obtained solid matter tends to be porous, and shrinkage hardly occurs.
A known lyophilizer may be used for lyophilization.

In the freeze-drying step, the water content of the composite solid is preferably 3 to 50% by mass. If the water content of the composite solid is 3% by mass or more, polarization of the polyanion hardly occurs and the amine compound can be easily coordinated. If it is 50% by mass or less, the water content of the conductive polymer solution The amount can be reduced, and the binder resin can be mixed more easily.
In order to bring the water content into the above range, for example, the freeze-drying time, the freeze-drying temperature, the degree of vacuum, etc. may be adjusted. For example, the shorter the freeze-drying time, the lower the freeze-drying temperature, and the higher the degree of vacuum, the greater the moisture content.

Further, the freeze-drying process, it is preferable that the BET specific surface area of the composite solids 5 to 200 m ² / g, and more preferably to 10 to 100 m ² / g. When the BET specific surface area of the composite solid is 5 m ² / g or more, the amine compound is easily coordinated to the composite in the dispersion step, and the dispersibility with respect to the liquid acrylic compound becomes higher. However, it is substantially difficult to make the BET specific surface area of the composite solid body larger than 200 m ² / g.
In order to bring the BET specific surface area into the above range, for example, the freeze-drying time, the freeze-drying temperature, the degree of vacuum, etc. may be adjusted. For example, the shorter the freeze-drying time, the greater the BET specific surface area.

[Dispersion process]
In the dispersion step, a liquid acrylic compound and an amine compound are added to the composite solid to prepare a composite solution, and the composite solution is dispersed.
When the liquid acrylic compound and the amine compound are added, one of the liquid acrylic compound and the amine compound may be added first, or both may be added simultaneously.

In the addition / dispersion in the dispersion step, it is preferable to use a mixing disperser that can impart a high shearing force. Examples of the mixing and dispersing machine include a homogenizer, a high-pressure homogenizer, and a bead mill. Among them, a high-pressure homogenizer is preferable.
Specific examples of the high-pressure homogenizer include a nanomizer manufactured by Yoshida Kikai Kogyo, a microfluidizer manufactured by Microfluidics, and an optimizer manufactured by Sugino Machine.
Examples of the dispersion process using the high-pressure homogenizer include a process in which the complex solution before the dispersion process is subjected to a high-pressure collision with each other, and a process in which the complex solution is passed through an orifice or a slit at a high pressure.

When the dispersion treatment is performed by the mixing and dispersing machine, in principle, the temperature of the conductive polymer solution obtained by the treatment becomes high. Therefore, the temperature of the complex solution before the dispersion treatment is preferably -20 to 60 ° C, more preferably -10 to 40 ° C, and particularly preferably -5 to 30 ° C. If the temperature of the complex solution is −20 ° C. or higher, freezing can be prevented, and if it is 60 ° C. or lower, alteration of the π-conjugated conductive polymer or polyanion can be prevented.
Moreover, you may cool the electroconductive polymer solution after a dispersion process through the heat exchanger with a refrigerant | coolant temperature of -30-20 degreeC, for example.

In the dispersion step, dispersion treatment is performed so that the cumulant average particle size of the composite is preferably 2000 nm or less, more preferably 500 nm or less, and particularly preferably 200 nm or less.
If the dispersion treatment is performed so that the average particle size of the cumulant of the composite is 2000 nm or less, the stability of the obtained conductive polymer solution is increased, and precipitation of the composite can be prevented.
The cumulant average particle size can be determined from the measurement of particle size distribution by the dynamic light scattering method.
The cumulant average particle size is adjusted by mixing conditions (for example, pressure) in the dispersion step. Specifically, the higher the pressure, the smaller the average particle size.

In the method for producing a conductive polymer solution of the present invention, a liquid acrylic compound is mixed with a composite solid obtained by freeze-drying from a conductive polymer aqueous solution. Since the lyophilized composite solid is porous, the liquid acrylic compound is likely to penetrate. Moreover, the solubility to a liquid acrylic compound can be improved by adding an amine compound to a composite solid.
Therefore, according to the method for producing a conductive polymer solution of the present invention, the composite can be uniformly contained in the liquid acrylic compound without applying ultrafiltration.

  In the following examples, the specific surface area is the BET specific surface area measured by nitrogen adsorption. The water content is a value measured by the Karl Fischer method. The cumulant average particle diameter is a value measured using FPR1000 manufactured by Otsuka Electronics. The surface resistance is a value measured using a Hiresta manufactured by Mitsubishi Chemical Corporation. The total light transmittance and haze are values measured according to JIS K7136 using a Nippon Denshoku Industries Co., Ltd. haze meter measuring device (NDH5000).

(Production Example 1)
14.2 g (0.1 mol) of 3,4-ethylenedioxythiophene and 27.5 g (0.15 mol) of polystyrene sulfonic acid (mass average molecular weight: about 150,000) were dissolved in 2000 ml of ion-exchanged water. The solution was mixed at 20 ° C. to obtain a monomer dispersion.
The monomer dispersion thus obtained was kept at 20 ° C., and while stirring, 29.64 g (0.13 mol) of ammonium persulfate and 8.0 g (0.02 mol) of secondary sulfuric acid dissolved in 200 ml of ion-exchanged water. An iron oxidation catalyst solution was added and the reaction was allowed to stir for 12 hours.
The obtained reaction solution was dialyzed to remove unreacted monomer, oxidizing agent and oxidation catalyst, and about 1.5% by mass of a blue polystyrenesulfonic acid-doped poly (3,4-ethylenedioxythiophene) aqueous solution (hereinafter, PEDOT-PSS aqueous solution).

(Production Example 2)
6.7 g (0.1 mol) of pyrrole and a solution prepared by dissolving 18.3 g (0.1 mol) of polystyrene sulfonic acid (mass average molecular weight: about 400,000) in 2000 ml of ion-exchanged water were mixed at 20 ° C. Thus, a monomer dispersion was obtained.
The monomer dispersion thus obtained was kept at 20 ° C., and while stirring, 29.64 g (0.13 mol) of ammonium persulfate and 8.0 g (0.02 mol) of secondary sulfuric acid dissolved in 200 ml of ion-exchanged water. An iron oxidation catalyst solution was added and the reaction was allowed to stir for 12 hours.
The obtained reaction solution was dialyzed to remove unreacted monomers, an oxidizing agent and an oxidation catalyst, and an about 1.5% by mass blue polystyrenesulfonic acid-doped polypyrrole aqueous solution was obtained.

(Production Example 3)
9.3 g (0.1 mol) of aniline and a solution of 27.5 g of polystyrene sulfonic acid (mass average molecular weight: about 150,000) dissolved in 2000 ml of ion-exchanged water are mixed at 20 ° C. to disperse the monomer. A liquid was obtained.
The monomer dispersion thus obtained was kept at 20 ° C., and while stirring, 29.64 g (0.13 mol) of ammonium persulfate and 8.0 g (0.02 mol) of secondary sulfuric acid dissolved in 200 ml of ion-exchanged water. An iron oxidation catalyst solution was added and the reaction was allowed to stir for 12 hours.
The obtained reaction solution was dialyzed to remove unreacted monomers, an oxidizing agent and an oxidation catalyst to obtain an aqueous solution of about 1.5% by mass of green polystyrenesulfonic acid-doped polyaniline.

(Production Example 4)
The aqueous solution of PEDOT-PSS obtained in Production Example 1 was freeze-dried for 16 hours with a freeze dryer (trade name: FDU1200, manufactured by Tokyo Rika) to obtain a composite solid. The obtained composite solid had a specific surface area of 22.5 m ² / g and a water content of 10.2% by mass.

(Production Example 5)
The PEDOT-PSS aqueous solution obtained in Production Example 1 was lyophilized with a freeze dryer for 10 hours to obtain a composite solid. The obtained composite solid had a specific surface area of 15.5 m ² / g and a water content of 5.0% by mass.

(Production Example 6)
The polystyrenesulfonic acid-doped polypyrrole aqueous solution obtained in Production Example 2 was freeze-dried for 24 hours with a freeze dryer to obtain a composite solid. The obtained composite solid had a specific surface area of 5.8 m ² / g and a water content of 6.5% by mass.

(Production Example 7)
The polystyrene sulfonic acid dope polyaniline solution obtained in Production Example 3 was dried with a freeze dryer for 12 hours to obtain a composite solid. The obtained composite solid had a specific surface area of 6.9 m ² / g and a moisture content of 15.1% by mass.

Example 1
After adding 0.189 g of trioctylamine to 249.061 g of hydroxyethyl acrylate and mixing, 0.75 g of the composite solid obtained in Production Example 4 was added, and the mixture was stirred at room temperature for 24 hours using a three-one motor. Thereafter, using a high-pressure homogenizer (Nanomizer manufactured by Yoshida Kikai Kogyo Co., Ltd.), a dispersion treatment at a pressure of 100 MPa was performed 10 times to obtain a conductive polymer solution.
It was 383 nm when the cumulant average particle diameter of the composite in the obtained conductive polymer solution was measured.
To 8 g of the obtained conductive polymer solution, 2.0 g of pentaerythritol triacrylate, 4.0 g of ethylene glycol and 0.2 g of Irgacure 127 (manufactured by Ciba Spatialty Chemicals) are added and mixed to obtain a uniform solution. Prepared. This solution was applied onto a polyethylene terephthalate film (Diafoil T680E, Mitsubishi Chemical Polyester, total light transmittance 91.8%, haze 2.1%) with a # 16 bar coater, and irradiated with 400 mJ ultraviolet rays using a high-pressure mercury lamp. Thus, a conductive coating film was formed. The surface resistance value of this conductive coating film was measured. The results are shown in Table 1.
Moreover, the total light transmittance and haze of the laminated body which consists of a polyethylene terephthalate film and an electroconductive coating film were measured. The results are shown in Table 1.

(Example 2)
After adding and mixing 0.189 g of trioctylamine with 249.061 g of hydroxyethyl acrylate, 0.75 g of the composite solid obtained in Production Example 5 was added, and the mixture was stirred at room temperature for 24 hours using a three-one motor. Thereafter, using a high-pressure homogenizer (Nanomizer manufactured by Yoshida Kikai Kogyo Co., Ltd.), a dispersion treatment at a pressure of 100 MPa was performed five times to obtain a conductive polymer solution.
It was 849 nm when the cumulant average particle diameter of the composite in the obtained conductive polymer solution was measured.
To 8 g of the obtained conductive polymer solution, 2.0 g of hydroxyethyl acrylamide, 1.5 g of dipentaerythritol hexaacrylate and 0.2 g of Irgacure 127 (manufactured by Ciba Spatialty Chemicals) are added and mixed uniformly. A solution was prepared. This solution was applied onto a polyethylene terephthalate film (Diafoil T680E) with a # 16 bar coater, and irradiated with 400 mJ ultraviolet rays using a high pressure mercury lamp to form a conductive coating film. The surface resistance value of this conductive coating film was measured. The results are shown in Table 1.
Moreover, the total light transmittance and haze of the laminated body which consists of a polyethylene terephthalate film and an electroconductive coating film were measured. The results are shown in Table 1.

(Example 3)
After adding and mixing 0.189 g of trioctylamine with 249.061 g of hydroxyethyl acrylate, 0.75 g of the composite solid obtained in Production Example 6 was added, and the mixture was stirred at room temperature for 24 hours using a three-one motor. Thereafter, using a high-pressure homogenizer (Nanomizer manufactured by Yoshida Kikai Kogyo Co., Ltd.), a dispersion treatment at a pressure of 100 MPa was performed twice to obtain a conductive polymer solution.
It was 1849 nm when the cumulant average particle diameter of the composite in the obtained conductive polymer solution was measured.
To 8 g of the obtained conductive polymer solution, 2.0 g of pentaerythritol triacrylate and 0.2 g of Irgacure 127 (manufactured by Ciba Spatialty Chemicals) were added and mixed to prepare a uniform solution. This solution was applied onto a polyethylene terephthalate film (Diafoil T680E) with a # 16 bar coater, and irradiated with 400 mJ ultraviolet rays using a high pressure mercury lamp to form a conductive coating film. The surface resistance value of this conductive coating film was measured. The results are shown in Table 1.
Moreover, the total light transmittance and haze of the laminated body which consists of a polyethylene terephthalate film and an electroconductive coating film were measured. The results are shown in Table 1.

Example 4
After adding and mixing 0.283 g of tridodecylamine to 249.061 g of hydroxyethyl acrylate, 0.75 g of the composite solid obtained in Production Example 7 was added, and the mixture was stirred at room temperature for 24 hours using a three-one motor. Thereafter, using a high-pressure homogenizer (Nanomizer manufactured by Yoshida Kikai Kogyo Co., Ltd.), a dispersion treatment at a pressure of 100 MPa was performed five times to obtain a conductive polymer solution.
It was 455 nm when the cumulant average particle diameter of the composite in the obtained conductive polymer solution was measured.
To 8 g of the obtained conductive polymer solution, 2.0 g of pentaerythritol triacrylate, 0.5 g of glycidyl methacrylate and 0.2 g of Irgacure 127 (manufactured by Ciba Spatialty Chemicals) are added and mixed to obtain a uniform solution. Prepared. This solution was applied onto a polyethylene terephthalate film (Diafoil T680E) with a # 16 bar coater, and irradiated with 400 mJ ultraviolet rays using a high pressure mercury lamp to form a conductive coating film. The surface resistance value of this conductive coating film was measured. The results are shown in Table 1.
Moreover, the total light transmittance and haze of the laminated body which consists of a polyethylene terephthalate film and an electroconductive coating film were measured. The results are shown in Table 1.

(Comparative Example 1)
0.6 g of the composite solid obtained in Production Example 4 and 99 g of hydroxyethyl acrylate were put in a container and stirred for 2 hours by a three-one motor. Thereafter, the mixture was stirred with a homogenizer at a rotation speed of 8000 rpm for 10 minutes, but did not dissolve. Subsequently, stirring was continued with the homogenizer for 1 hour, but the composite solid did not dissolve. Since the high-pressure homogenizer might clog, the subsequent dispersion treatment was abandoned.

In Examples 1 to 4 obtained by adding a liquid acrylic compound and an amine compound to a composite solid obtained by lyophilization, a π-conjugated system was used in a conductive polymer solution without applying ultrafiltration. A composite containing a conductive polymer and a polyanion could be uniformly contained. Therefore, the surface resistance of the conductive coating film was sufficiently low.
On the other hand, the conductive polymer solution was not obtained in Comparative Example 1 in which the liquid acrylic compound was added to the composite solid obtained by lyophilization and the amine compound was not added.

Claims (6)

a freeze-drying step of freeze-drying a conductive polymer aqueous solution containing a complex comprising a π-conjugated conductive polymer and a polyanion to obtain a composite solid;
A method for producing a conductive polymer solution, comprising: a dispersion step of adding a liquid acrylic compound and an amine compound to the composite solid and performing a dispersion treatment.   2. The method for producing a conductive polymer solution according to claim 1, wherein in the freeze-drying step, the water content of the composite solid is 3 to 50 mass%. 3. The method for producing a conductive polymer solution according to claim 1, wherein in the freeze-drying step, the specific surface area of the composite solid is 5 to 200 m ² / g.   The method for producing a conductive polymer solution according to any one of claims 1 to 3, wherein in the dispersion step, the composite is subjected to a dispersion treatment such that the cumulant average particle diameter of the composite is 2000 nm or less. The conductive polymer aqueous solution according to claim 1, wherein the conductive polymer aqueous solution contains one or more conductivity improvers selected from the following compounds (a) to (h). A method for producing a molecular solution.
(A) a nitrogen-containing aromatic cyclic compound (b) a compound having two or more hydroxy groups (c) a compound having two or more carboxy groups (d) one or more hydroxy groups and one or more carboxys (E) Compound having amide group (f) Compound having imide group (g) Lactam compound (h) Compound having glycidyl group   A conductive polymer solution comprising a π-conjugated conductive polymer, a polyanion, a liquid acrylic compound, and an amine compound, wherein the liquid acrylic compound content is 70% by mass or more.