JP5014750B2 - Conductive polymer paint and conductive coating film - Google Patents

Description

  The present invention relates to a conductive coating film used for conductive polymer paints, transparent electrodes and the like containing a π-conjugated conductive polymer.

Transparent electrodes are used in input devices such as a transparent touch panel and image display devices such as an electroluminescence display and a liquid crystal display.
As the transparent electrode, for example, a conductive film obtained by vacuum-depositing ITO (indium-tin oxide) as a conductive component on a base material is used. However, there is a problem that the vacuum deposition for producing the conductive film is complicated and the vacuum deposition apparatus is expensive, and the resulting conductive film is also expensive.
Therefore, a method has been proposed in which a conductive polymer coating is applied to a substrate to form a conductive coating (see Non-Patent Document 1). As the conductive polymer coating, a conductive polymer aqueous solution in which a π-conjugated conductive polymer is dissolved in water or a mixed solvent of water and a hydrophilic organic solvent is used. For example, Patent Document 1 proposes a polythiophene solution in which polythiophene is dissolved in water via polystyrene sulfonic acid.
Japanese Patent No. 2636968 Kazuhiro Takasada, “Low Resistance, Low Temperature, Large Area Film Formation Technology for Transparent Conductive Films for De-ITO”, published by Technical Information Association, Inc., July 29, 2005, p. 3-11

Although the conductive coating film obtained from the polythiophene solution described in Patent Document 1 has low surface resistance and excellent visible light permeability, it has a high affinity for water, so it is insufficient in hot water resistance and high temperature and high humidity resistance. There was a problem of being.
As a method for improving hot water resistance and high temperature and high humidity resistance, a polyfunctional acrylic monomer such as pentaerythritol triacrylate or dipentaerythritol hexaacrylate is contained in a conductive polymer aqueous solution, and this is formed into a coating film. A method is conceivable in which a polymer is sometimes polymerized and a crosslinked binder resin is contained in the conductive coating film.
However, when a binder resin is contained in the conductive coating film, the conductivity is insufficient, so that it cannot be used as a transparent electrode.
Moreover, since the conventionally known polyfunctional acrylic monomer is not hydrophilic, it is difficult to dissolve in a conductive polymer aqueous solution and it is not mixed uniformly. Therefore, a coating film formed from a conventional conductive polymer aqueous solution containing a polyfunctional acrylic monomer tends to be unevenly distributed in a binder resin composed of a cross-linked acrylic resin, and the hot water resistance and the high temperature and high humidity resistance may not increase. .
This invention is made in view of the said situation, and it aims at providing the conductive polymer coating material which can form the electrically conductive coating film which was excellent in all of electroconductivity, hot water resistance, and high temperature-and-humidity resistance. To do. Moreover, it aims at providing the electroconductive coating film which was excellent in all of electroconductivity, hot water resistance, and high temperature-and-humidity resistance.

The present invention includes the following configurations.
[1] A π-conjugated conductive polymer, a polyanion, a polyfunctional compound having two or more (meth) acrylamide groups in one molecule, and a solvent , wherein the polyfunctional compound is N, N— methylenebis (meth) acrylamide, N, Ru N- ethylenebis (meth) acrylamide, N, N- propylene bis (meth) acrylamide, N, der either N- (1,2-dihydroxyethyl) (meth) acrylamide A conductive polymer paint characterized by that.
[2] The conductive polymer paint according to [1], further comprising a conductivity improver.
[3] A conductive coating film formed by applying the conductive polymer paint according to [1] or [2] and polymerizing the polyfunctional compound.

According to the conductive polymer paint of the present invention, it is possible to form a conductive coating film excellent in conductivity, hot water resistance, and high temperature and high humidity resistance.
The conductive coating film of the present invention is excellent in conductivity, hot water resistance and high temperature and high humidity resistance.

(Conductive polymer paint)
The conductive polymer paint of the present invention contains a π-conjugated conductive polymer, a polyanion, a polyfunctional compound, and a solvent.

[Π-conjugated conductive polymer]
The π-conjugated conductive polymer is not particularly limited as long as the main chain is an organic polymer composed of a π-conjugated system. For example, polypyrroles, polythiophenes, polyacetylenes, polyphenylenes, polyphenylene vinylenes, Examples thereof include polyanilines, polyacenes, polythiophene vinylenes, and copolymers thereof. From the viewpoint of stability in air, polypyrroles, polythiophenes and polyanilines are preferred.
Even if the π-conjugated conductive polymer remains unsubstituted, sufficient conductivity and compatibility with the binder resin can be obtained, but in order to further improve conductivity and compatibility, an alkyl group, a carboxyl group, It is preferable to introduce a functional group such as a sulfo group, an alkoxyl group, or a hydroxyl group into the π-conjugated conductive polymer.

  Specific examples of the π-conjugated conductive polymer include polypyrrole, poly (N-methylpyrrole), poly (3-methylpyrrole), poly (3-ethylpyrrole), 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-methyl) -4-hexyloxypyrrole), poly (thiophene), poly (3-methylthiophene), poly (3-ethylthiophene), poly (3-propylthiophene), poly (3-butylthiophene), poly (3-hexyl) Thiophene), 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-dibutyl) Thiophene), poly (3-hydroxythiophene), poly (3-methoxythiophene), poly (3 -Ethoxythiophene), poly (3-butoxythiophene), poly (3-hexyloxythiophene), poly (3-heptyloxythiophene), poly (3-octyloxythiophene), poly (3-decyloxythiophene), poly (3-dodecyloxythiophene), poly (3-octadecyloxythiophene), poly (3-methyl-4-methoxythiophene), poly (3,4-ethylenedioxythiophene), poly (3-methyl-4-ethoxy) Thiophene), poly (3-carboxythiophene), poly (3-methyl-4-carboxythiophene), poly (3-methyl-4-carboxyethylthiophene), poly (3-methyl-4-carboxybutylthiophene), polyaniline , Poly (2-methylaniline), poly (3-isobutyla) Phosphorus), poly (2-aniline sulfonic acid), poly (3-aniline sulfonic acid), and the like.

  The content of the π-conjugated conductive polymer in the conductive polymer coating is preferably 0.1 to 10% by mass, and more preferably 0.5 to 5.0% by mass. If the content of the π-conjugated conductive polymer is 0.1% by mass or more, the conductivity of the resulting conductive coating film can be made higher, and if it is 10% by mass or less, the conductive polymer coating is easy. Can be prepared.

[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 hydroxyl group, an amino group, a carboxyl group, a cyano group, a phenyl group, a phenol group, an ester group, and an alkoxyl group. In view of solubility in an organic solvent, heat resistance, compatibility with a resin, and the like, an alkyl group, a hydroxyl 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 hydroxyl group include a hydroxyl 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 a carbon group having 2 to 7 carbon atoms. An alkenyl group, an amide group, an imide group, etc. are mentioned. Hydroxyl 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 directly or via another functional group to the main chain of the polyanion. 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 carboxyl 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 in the principal chain of a polyanion adjacently or at fixed intervals.

  Among the polyanions, polyisoprene sulfonic acid, a copolymer containing polyisoprene sulfonic acid, a polysulfoethyl methacrylate, a copolymer containing polysulfoethyl methacrylate, and poly (4-sulfone) are preferable in view of solvent solubility and conductivity. Butyl methacrylate), copolymers containing poly (4-sulfobutyl methacrylate), polymethallyloxybenzene sulfonic acid, copolymers containing polymethallyloxybenzene sulfonic acid, polystyrene sulfonic acid, copolymer containing polystyrene sulfonic acid A coalescence or the like is preferable.

  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 reduced, 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.

[Polyfunctional compound]
The polyfunctional compound has two or more (meth) acrylamide groups in one molecule.
Specific examples of the polyfunctional compound include N, N-methylenebis (meth) acrylamide, N, N-ethylenebis (meth) acrylamide, N, N-propylenebis (meth) acrylamide, N, N- (1,2- And dihydroxyethyl) (meth) acrylamide.

  The amount of the polyfunctional compound is preferably 1 to 1000 parts by mass, more preferably 5 to 500 parts by mass, with respect to 100 parts by mass of the total amount of the π-conjugated conductive polymer and the polyanion. Particularly preferred is 300 parts by mass. When the amount of the polyfunctional compound is 1 mass or more, the water resistance, hot water resistance, high temperature resistance and high humidity resistance of the resulting conductive coating film can be increased, and the film strength can be increased. Moreover, if content of polyfunctional acrylic is 1000 mass parts or less, since content of (pi) conjugated system conductive polymer in an electroconductive coating film turns into sufficient quantity, sufficient electroconductivity is securable.

Since the polyfunctional compound has two or more unsaturated double bonds, a cross-linked acrylamide resin can be formed by polymerization of the polyfunctional compound.
In addition, since the polyfunctional compound has two or more (meth) acrylamide groups (R is a hydrogen atom or a methyl group) represented by CH ₂ ═CR—CO—NH— in one molecule, water, and / or , It becomes soluble in an organic solvent miscible with water having an SP value of 10 or more. Examples of the organic solvent having an SP value of 10 or more include methanol, ethanol, n-propanol, isopropanol, methyl ethyl ketone, diethyl ketone, propylene glycol methyl ether, dimethylacetamide, dimethylformamide and the like.

[solvent]
The solvent is not particularly limited. For example, water, N-methyl-2-pyrrolidone, N, N-dimethylformamide, N, N-dimethylacetamide, dimethyl sulfoxide, hexamethylene phosphortriamide, N-vinylpyrrolidone, N- Polar solvents such as vinylformamide, N-vinylacetamide, phenols such as cresol, phenol, xylenol, alcohols such as methanol, ethanol, propanol, butanol, 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-penta Polyols such as diol, 1,6-hexanediol, 1,9-nonanediol and neopentyl glycol, ketones such as acetone and methyl ethyl ketone, hydrocarbons such as hexane, benzene and toluene, formic acid and acetic acid Carboxylic acids such as, carbonate compounds such as ethylene carbonate and propylene carbonate, ether compounds such as dioxane and diethyl ether, chain ethers such as ethylene glycol dialkyl ether, propylene glycol dialkyl ether, polyethylene glycol dialkyl ether, polypropylene glycol dialkyl ether, Heterocyclic compounds such as 3-methyl-2-oxazolidinone, acetonitrile, glutarodinitrile, methoxyacetonitrile, propionitrile, benzonitrile, etc. Nitrile compounds, and the like. These solvents may be used alone or as a mixture of two or more.

[Conductivity improver]
In order to improve the electroconductivity of the conductive film obtained, it is preferable to add a conductivity improver to the conductive polymer paint. Here, the conductivity improver interacts with the dopant of the π-conjugated conductive polymer or the π-conjugated conductive polymer to improve the conductivity of the π-conjugated conductive polymer.
Examples of the conductivity improver include, for example, a nitrogen-containing aromatic cyclic compound, a compound having two or more hydroxyl groups, a compound having two or more carboxyl groups, one or more hydroxyl groups, and one or more carboxyls. A compound having a group, a compound having an amide group (amide compound), a compound having an imide group (imide compound), a lactam compound, a compound having a glycidyl group, and the like.

-Nitrogen-containing aromatic cyclic compound Examples of the nitrogen-containing aromatic cyclic compound include pyridine and derivatives thereof, imidazole and derivatives thereof, pyrimidine and derivatives thereof, pyrazine and derivatives thereof, triazine and derivatives thereof, and the like.

  Specific examples of pyridine derivatives include 2-methylpyridine, 3-methylpyridine, 4-methylpyridine, 4-ethylpyridine, 2,4-dimethylpyridine, 2,4,6-trimethylpyridine, and 3-cyano-5. -Methylpyridine, 2-pyridinecarboxylic acid, 6-methyl-2-pyridinecarboxylic acid, 2,6-pyridine-dicarboxylic acid, 4-pyridinecarboxaldehyde, 4-aminopyridine, 2,3-diaminopyridine, 2,6 -Diaminopyridine, 2,6-diamino-4-methylpyridine, 4-hydroxypyridine, 2,6-dihydroxypyridine, methyl 6-hydroxynicotinate, 2-hydroxy-5-pyridinemethanol, ethyl 6-hydroxynicotinate, 4-pyridinemethanol, 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, 2,5-pyridinedicarboxylic acid, 2,6-pyridine Examples thereof include dicarboxylic acid and 3-pyridinesulfonic acid.

  Specific examples of imidazole derivatives include 2-methylimidazole, 2-propylimidazole, 2-undecylimidazole, 2-phenylimidazole, N-methylimidazole, 1- (2-hydroxyethyl) imidazole, 2-ethyl-4. -Methylimidazole, 1,2-dimethylimidazole, 1-benzyl-2-methylimidazole, 1-benzyl-2-phenylimidazole, 1-cyanoethyl-2-methylimidazole, 1-cyanoethyl-2-ethyl-4-methylimidazole 2-phenyl-4,5-dihydroxymethylimidazole, 1-acetylimidazole, 4,5-imidazole dicarboxylic acid, dimethyl 4,5-imidazole dicarboxylate, benzimidazole, 2-aminobenzimidazole, 2-aminobenzene 'S imidazol-2-sulfonic acid, 2-amino-1-methyl-base lens imidazole, 2-hydroxy-base lens imidazole, 2- (2-pyridyl) base lens and imidazole.

  Specific examples of derivatives of pyrimidine 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, Examples include 2,4-dihydroxypyrimidine-5-carboxylic acid, 2,4,6-triaminopyrimidine, 2,4-dimethoxypyrimidine, 2,4,5-trihydroxypyrimidine, 2,4-pyrimidinediol and the like.

  Specific examples of pyrazine derivatives include 2-methylpyrazine, 2,5-dimethylpyrazine, pyrazinecarboxylic acid, 2,3-pyrazinedicarboxylic acid, 5-methylpyrazinecarboxylic acid, pyrazineamide, 5-methylpyrazineamide, 2 -Cyanopyrazine, aminopyrazine, 3-aminopyrazine-2-carboxylic acid, 2-ethyl-3-methylpyrazine, 2-ethyl-3-methylpyrazine, 2,3-dimethylpyrazine, 2,3-diethylpyrazine, etc. Can be mentioned.

  Specific examples of the derivatives of triazine include 2-amino-1,3,5-triazine, 3-amino-1,2,4-triazine, 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'-disulfonic acid disodium salt, 2-hydroxy-4,6 -Dichloro-1,3,5-triazine and the like The

-Compound having two or more hydroxyl groups Examples of the compound having two or more hydroxyl 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, pentaerythritol Polyhydric aliphatic alcohols such as dipentaerythritol, thiodiethanol, glucose, tartaric acid, D-glucaric acid, glutaconic acid;
Polymer alcohols such as polyvinyl alcohol, 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.

・ Compounds having two or more carboxyl groups As compounds having two or more carboxyl groups, maleic acid, fumaric acid, itaconic acid, citraconic acid, malonic acid, 1,4-butanedicarboxylic acid, succinic acid, tartaric acid, Aliphatic carboxylic acid compounds such as adipic acid, D-glucaric acid, glutaconic acid and 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 carboxyl group is bonded to an aromatic ring, such as carboxylic dianhydride, naphthalene dicarboxylic acid, trimellitic acid, pyromellitic acid; diglycolic acid, oxydipropion Examples include acids, thiodiacetic acid (thiodiacetic acid), thiodibutyric acid, iminodiacetic acid, and iminobutyric acid.

・ Compounds having one or more hydroxyl groups and one or more carboxyl groups As compounds having one or more hydroxyl groups and one or more carboxyl groups, tartaric acid, glyceric acid, dimethylolbutanoic acid, dimethylolpropanoic acid , D-glucaric acid, glutaconic acid and the like.

Amide Compound The amide compound is a monomolecular compound having an amide bond represented by —CO—NH— (CO is a double bond) in the molecule.
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, plubuamide, acetoacetamide, Dimethylacetamide, benzylamide, anthranilamide, ethylenediamine Laacetamide, diacetamide, triacetamide, dibenzamide, tribenzamide, N, N-dimethylaminopropylacrylamide, isopropylacrylamide, N-hydroxyethylacrylamide, N-hydroxypropylacrylamide, N-hydroxybutylacrylamide, N-hydroxyethylacetamide N-hydroxypropylacetamide, N-hydroxybutylacetamide, acetamidebenzoic acid and derivatives thereof, rhodanine, urea, 1-acetyl-2-thiourea, biuret, butylurea, dibutylurea, 1,3-dimethylurea, 1 , 3-diethylurea and derivatives thereof.

Among amide compounds, N-hydroxyalkyl (meth) acrylamide and N-alkoxyalkyl (meth) acrylamide should be used because the crosslink density of the resulting conductive coating film is improved and the water resistance and hot water resistance are further improved. Is preferred.
Examples of N-hydroxyalkyl (meth) acrylamide include N-hydroxymethyl (meth) acrylamide (N-methylol (meth) acrylamide), N-hydroxyethyl (meth) acrylamide, N-hydroxypropyl (meth) acrylamide, N -Hydroxybutyl acrylamide etc. are mentioned.
Examples of N-alkoxyalkyl (meth) acrylamide include N-methoxymethyl (meth) acrylamide, N-ethoxymethyl (meth) acrylamide, N-butoxymethyl (meth) acrylamide, N-isobutoxymethyl (meth) acrylamide, and the like. Is mentioned.

  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.

-Imide compound As an amide compound, since electroconductivity becomes higher, the monomolecular compound (henceforth an imide compound) which has an imide bond is preferable. 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, glutarimide, semicarbazide, α, α-dimethyl-6-methylsuccinimide, bis [2- (succinimideoxy) Carbonyloxy) 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.

-Lactam compound A lactam compound is an intramolecular cyclic amide of 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.

-Compound having glycidyl group Examples of the compound having glycidyl group include ethyl glycidyl ether, butyl glycidyl ether, t-butyl glycidyl ether, allyl glycidyl ether, benzyl glycidyl ether, glycidyl phenyl ether, bisphenol A, diglycidyl ether, acrylic Examples thereof include glycidyl compounds such as acid glycidyl ether and methacrylic acid glycidyl ether.

  The content of the conductivity improver is preferably 0.01 to 100 parts by mass, more preferably 0.1 to 50 parts by mass with respect to 100 parts by mass of the total amount of the π-conjugated conductive polymer and the polyanion. preferable. If the content of the conductivity improver is less than the lower limit, the effect of the conductivity improver tends to be low and the conductivity tends to be low. If the content exceeds the upper limit, the π-conjugated conductive polymer concentration There is a tendency for the conductivity to decrease due to the decrease in.

[Dopant]
The dopant may be donor-type or acceptor-type as long as it can change the redox potential of the conjugated electron in the π-conjugated conductive polymer in doping and dedoping to the π-conjugated conductive polymer. It may be. However, since the doping effect is high, an acceptor inorganic acid or organic acid is preferable.
Specific examples of the donor dopant and the acceptor dopant are shown below.

Donor-type dopants Examples of donor-type dopants include alkali metals such as sodium and potassium, alkaline earth metals such as calcium and magnesium, tetramethylammonium, tetraethylammonium, tetrapropylammonium, tetrabutylammonium, methyltriethylammonium, and dimethyl. And quaternary amine salt compounds such as diethylammonium.

-Acceptor dopant As an acceptor dopant, a halogen compound, a Lewis acid, a proton acid, an organic cyano compound, an organometallic compound etc. can be used, for example.
Furthermore, examples of the halogen compound include chlorine (Cl ₂ ), bromine (Br ₂ ), iodine (I ₂ ), iodine chloride (ICl), iodine bromide (IBr), and iodine fluoride (IF). .
Examples of the Lewis acid include PF ₅ , AsF ₅ , SbF ₅ , BF ₅ , BCl ₅ , BBr ₅ , SO _{3 and the} like.
As the organic cyano compound, a compound containing two or more cyano groups in a conjugated bond can be used. For example, tetracyanoethylene, tetracyanoethylene oxide, tetracyanobenzene, tetracyanoquinodimethane, tetracyanoazanaphthalene, and the like can be given.

  Examples of the protonic acid include inorganic acids and organic acids. Furthermore, examples of the inorganic acid include hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, borohydrofluoric acid, hydrofluoric acid, and perchloric acid. Moreover, organic carboxylic acid, organic sulfonic acid, etc. are mentioned as an organic acid.

  As the organic carboxylic acid, aliphatic, aromatic, cycloaliphatic or the like containing one or more carboxyl groups can be used. For example, formic acid, acetic acid, oxalic acid, benzoic acid, phthalic acid, maleic acid, fumaric acid, malonic acid, tartaric acid, citric acid, lactic acid, succinic acid, monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, trifluoroacetic acid, nitroacetic acid, And triphenylacetic acid.

  As the organic sulfonic acid, aliphatic, aromatic, cycloaliphatic or the like containing one or more sulfo groups can be used. Examples of those containing one sulfo group include methanesulfonic acid, ethanesulfonic acid, 1-propanesulfonic acid, 1-butanesulfonic acid, 1-hexanesulfonic acid, 1-heptanesulfonic acid, 1-octanesulfonic acid, 1-nonanesulfonic acid, 1-decanesulfonic acid, 1-dodecanesulfonic acid, 1-tetradecanesulfonic acid, 1-pentadecanesulfonic acid, 2-bromoethanesulfonic acid, 3-chloro-2-hydroxypropanesulfonic acid, trifluoromethane Sulfonic acid, colistin methanesulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, aminomethanesulfonic acid, 1-amino-2-naphthol-4-sulfonic acid, 2-amino-5-naphthol-7-sulfone Acid, 3-aminopropanesulfonic acid, N-cyclohexyl-3- Minopropanesulfonic acid, benzenesulfonic acid, p-toluenesulfonic acid, xylenesulfonic acid, ethylbenzenesulfonic acid, propylbenzenesulfonic acid, butylbenzenesulfonic acid, pentylbenzenesulfonic acid, hexylbenzenesulfonic acid, heptylbenzenesulfonic acid, octylbenzene Sulfonic acid, nonylbenzenesulfonic acid, decylbenzenesulfonic acid, undecylbenzenesulfonic acid, dodecylbenzenesulfonic acid, pentadecylbenzenesulfonic acid, hexadecylbenzenesulfonic acid, 2,4-dimethylbenzenesulfonic acid, dipropylbenzenesulfone Acid, butylbenzenesulfonic acid, 4-aminobenzenesulfonic acid, o-aminobenzenesulfonic acid, m-aminobenzenesulfonic acid, 4-amino-2-chlorotolue -5-sulfonic acid, 4-amino-3-methylbenzene-1-sulfonic acid, 4-amino-5-methoxy-2-methylbenzenesulfonic acid, 2-amino-5-methylbenzene-1-sulfonic acid, 4 -Amino-2-methylbenzene-1-sulfonic acid, 5-amino-2-methylbenzene-1-sulfonic acid, 4-amino-3-methylbenzene-1-sulfonic acid, 4-acetamido-3-chlorobenzenesulfonic acid 4-chloro-3-nitrobenzenesulfonic acid, p-chlorobenzenesulfonic acid, naphthalenesulfonic acid, methylnaphthalenesulfonic acid, propylnaphthalenesulfonic acid, butylnaphthalenesulfonic acid, pentylnaphthalenesulfonic acid, dimethylnaphthalenesulfonic acid, 4-amino- 1-naphthalenesulfonic acid, 8-chloronaphthalene-1 Acid, naphthalenesulfonic acid-formalin polycondensate, a sulfonic acid compound containing a sulfo group such as melamine sulfonic acid-formalin polycondensates, and the like.

  Examples of those containing two or more sulfo groups include ethanedisulfonic acid, butanedisulfonic acid, pentanedisulfonic acid, decanedisulfonic acid, m-benzenedisulfonic acid, o-benzenedisulfonic acid, p-benzenedisulfonic acid, and toluenedisulfonic acid. Xylene disulfonic acid, chlorobenzene disulfonic acid, fluorobenzene disulfonic acid, aniline-2,4-disulfonic acid, aniline-2,5-disulfonic acid, dimethylbenzene disulfonic acid, diethylbenzene disulfonic acid, dibutylbenzene sulfonic acid, naphthalene disulfonic acid, Methyl naphthalene disulfonic acid, ethyl naphthalene disulfonic acid, dodecyl naphthalene disulfonic acid, pentadecyl naphthalene disulfonic acid, butyl naphthalene disulfonic acid, 2-amino-1,4-benze Disulfonic acid, 1-amino-3,8-naphthalenedisulfonic acid, 3-amino-1,5-naphthalenedisulfonic acid, 8-amino-1-naphthol-3,6-disulfonic acid, 4-amino-5-naphthol- 2,7-disulfonic acid, anthracene disulfonic acid, butylanthracene disulfonic acid, 4-acetamido-4'-isothio-cyanatostilbene-2,2'-disulfonic acid, 4-acetamido-4'-isothiocyanatostilbene-2 , 2'-disulfonic acid, 4-acetamido-4'-maleimidyl stilbene-2,2'-disulfonic acid, 1-acetoxypyrene-3,6,8-trisulfonic acid, 7-amino-1,3 6-naphthalene trisulfonic acid, 8-aminonaphthalene-1,3,6-trisulfonic acid, 3-amino-1,5,7-naphth Rent Li sulfonic acid and the like.

[Additive]
The additive is not particularly limited as long as it can be mixed with a π-conjugated conductive polymer and a dopant, and examples thereof include alkaline compounds, surfactants, antifoaming agents, coupling agents, antioxidants, and ultraviolet absorbers. Etc. can be used.
As the alkaline compound, known inorganic alkali compounds and organic alkali compounds can be used. Examples of the inorganic alkali compound include sodium hydroxide, potassium hydroxide, calcium hydroxide, ammonia and the like.
Examples of the organic alkali compound include aliphatic amines, aromatic amines, quaternary amines, nitrogen-containing compounds other than amines, metal alkoxides, and dimethyl sulfoxide. Among these, one or two or more selected from the group consisting of aliphatic amines, aromatic amines, and quaternary amines are preferable because of higher conductivity.
Surfactants include anionic surfactants such as carboxylates, sulfonates, sulfates and phosphates; cationic surfactants such as amine salts and quaternary ammonium salts; carboxybetaines and aminocarboxylics Examples include amphoteric surfactants such as acid salts and imidazolium betaines; nonionic surfactants such as polyoxyethylene alkyl ethers, polyoxyethylene glycerin fatty acid esters, ethylene glycol fatty acid esters, and polyoxyethylene fatty acid amides.
Examples of the antifoaming agent include silicone resin, polydimethylsiloxane, and silicone resin.
Examples of the coupling agent include silane coupling agents having a vinyl group, an amino group, an epoxy group, and the like.
Examples of the antioxidant include phenolic antioxidants, amine antioxidants, phosphorus antioxidants, sulfur antioxidants, saccharides, vitamins and the like.
Examples of UV absorbers include benzotriazole UV absorbers, benzophenone UV absorbers, salicylate UV absorbers, cyanoacrylate UV absorbers, oxanilide UV absorbers, hindered amine UV absorbers, and benzoate UV absorbers. Is mentioned.
It is preferable to use an antioxidant and an ultraviolet absorber in combination.

[Polymerization initiator]
In addition, since the conductive polymer coating can promote the reaction of the polyfunctional compound, it may contain a polymerization initiator such as a photopolymerization initiator or a cationic polymerization initiator. Examples of the photopolymerization initiator include acetophenones, benzophenones, Michler benzoylbenzoate, tetramethylthiuram monosulfide, and thioxanthones. Furthermore, n-butylamine, triethylamine, tri-n-butylphosphine, or the like can be mixed as a photosensitizer.
Examples of the cationic polymerization initiator include aryldiazonium salts, diarylhalonium salts, triphenylsulfonium salts, silanol / aluminum chelates, α-sulfonyloxyketones, and the like.

[Method for producing conductive polymer paint]
As a method for producing a conductive polymer paint, for example, a precursor polymer of a π-conjugated conductive polymer is chemically oxidatively polymerized in an aqueous solution of polyanion to prepare a conductive polymer aqueous solution. The method of adding a compound and an arbitrary component as needed is mentioned.

In the conductive polymer coating as described above, it is considered that the amide bond of the polyfunctional compound acts on the π-conjugated conductive polymer, thereby improving the conductivity of the resulting conductive coating film.
Moreover, since the polyfunctional compound has an amide bond showing hydrophilicity, it is uniformly mixed in the conductive polymer paint. Therefore, in the conductive coating film obtained from the conductive polymer paint, the dispersibility of the acrylamide resin (binder resin) formed from the polyfunctional compound is high, and the acrylamide resin is cross-linked. Excellent resistance to high temperature and humidity.

(Conductive coating)
The conductive coating film of the present invention is formed by applying the conductive polymer paint and polymerizing the polyfunctional compound.
Examples of the method for applying the conductive polymer paint include comma coating, spray coating, roll coating, cast coating, dip coating, and gravure printing.
After application, the solvent may be removed by heating, or polymerization may be performed by heat or light. As a heating method in the case of heating, for example, a normal method such as hot air heating or infrared heating can be adopted. In addition, as a light irradiation method when forming a coating film by photocuring, for example, a method of irradiating ultraviolet rays from a light source such as an ultrahigh pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a xenon arc, or a metal halide lamp can be adopted. .

  Since the conductive coating film of the present invention is formed by applying the conductive polymer paint and polymerizing the polyfunctional compound, all of the conductivity, hot water resistance and high temperature and high humidity resistance are excellent. . Such a conductive coating film can be suitably used as a transparent electrode provided in an input device such as a transparent touch panel and an image display device such as an electroluminescence display and a liquid crystal display.

  Examples of the present invention will be specifically described below, but the present invention is not limited to the examples.

(Production Example 1) Preparation of polystyrene sulfonic acid 206 g of sodium styrene sulfonate was dissolved in 1000 ml of ion-exchanged water, and 1.14 g of ammonium persulfate oxidizing agent solution previously dissolved in 10 ml of water was stirred at 80 ° C. The solution was added dropwise for 20 minutes, and the solution was stirred for 2 hours.
1000 ml and 10,000 ml of ion-exchanged water diluted with 10% by mass of sulfuric acid diluted to 10% by mass were added to the sodium styrenesulfonate-containing solution thus obtained, and about 10,000 ml of the polystyrenesulfonic acid-containing solution was removed using an ultrafiltration method. Then, 10,000 ml of ion-exchanged water was added to the remaining liquid, and about 10,000 ml of solution was removed using an ultrafiltration method. The above ultrafiltration operation was repeated three times.
Furthermore, about 10,000 ml of ion-exchanged water was added to the obtained filtrate, and about 10,000 ml of solution was removed using an ultrafiltration method. This ultrafiltration operation was repeated three times.
The ultrafiltration conditions were as follows (the same applies to other examples).
Molecular weight cut off of ultrafiltration membrane: 30K
Cross flow type Supply liquid flow rate: 3000 ml / min Membrane partial pressure: 0.12 Pa
Water in the obtained solution was removed under reduced pressure to obtain colorless solid polystyrene sulfonic acid.

(Production Example 2) Preparation of polystyrenesulfonic acid-doped poly (3,4-ethylenedioxythiophene) aqueous solution 14.2 g of 3,4-ethylenedioxythiophene and 36.7 g of polystyrenesulfonic acid obtained in Production Example 35 A solution dissolved in 2000 ml of ion-exchanged water was mixed at 20 ° C.
While maintaining the mixed solution thus obtained at 20 ° C. and stirring, 29.64 g of ammonium persulfate dissolved in 200 ml of ion exchange water and 8.0 g of ferric sulfate oxidation catalyst solution were slowly added, The reaction was stirred for 3 hours.
2000 ml of ion-exchanged water was added to the resulting reaction solution, and about 2000 ml of solution was removed using an ultrafiltration method. This operation was repeated three times.
Then, 200 ml of sulfuric acid diluted to 10% by mass and 2000 ml of ion-exchanged water are added to the treatment liquid that has been subjected to the filtration treatment, and about 2000 ml of the treatment liquid is removed using an ultrafiltration method. Ion exchange water was added and about 2000 ml of liquid was removed using ultrafiltration. This operation was repeated three times.
Furthermore, 2000 ml of ion-exchanged water was added to the obtained treatment liquid, and about 2000 ml of the treatment liquid was removed using an ultrafiltration method. This operation was repeated 5 times to obtain an about 1.5% by mass blue polystyrenesulfonic acid-doped poly (3,4-ethylenedioxythiophene) (PEDOT-PSS) aqueous solution.

Example 1
To 100 g of the PEDOT-PSS aqueous solution obtained in Production Example 2, 3.0 g of N, N-methylenebisacrylamide, 0.1 g of Irgacure 127 (manufactured by Ciba Specialty Chemicals) and 50 g of ethanol are added, The mixture was uniformly mixed to obtain a conductive polymer paint.
The conductive polymer paint was applied on an easily adhesive polyethylene terephthalate film (Diapoile T680E100 manufactured by Mitsubishi Polyester Film Co., Ltd., total light transmittance 93%, haze 1.8%) with a wire coater # 8. After heat drying for 2 minutes in an oven at 0 ° C., ultraviolet irradiation (high pressure mercury lamp 100 W, 500 mJ / cm ² ) was performed.
The conductive coating film thus obtained was evaluated by the following evaluation method. The results are shown in Table 1.

・ Measurement of initial surface resistivity (conductivity evaluation)
The initial surface resistivity of the conductive coating film was measured with a Loresta (Mitsubishi Chemical).
-Evaluation of total light transmittance The total light transmittance was measured based on JISK7361-1.
-Evaluation of haze Haze was measured based on JISK7136.
-Surface resistivity measurement after immersion in hot water (evaluation of hot water resistance)
After immersing the conductive coating film in hot water at 80 ° C. for 18 hours, the surface resistivity was measured. The smaller the variation rate of the surface resistivity with respect to the initial surface resistivity, the better the hot water resistance.
・ Measurement of surface resistivity after standing in high temperature and high humidity environment (evaluation of high temperature and high humidity resistance)
After leaving for 1000 hours in an environment of a temperature of 60 ° C. and a relative humidity of 95%, the surface resistivity was measured. The smaller the variation rate of the surface resistivity with respect to the initial surface resistivity, the better the high temperature and high humidity resistance.

(Example 2)
To 100 g of the PEDOT-PSS aqueous solution obtained in Production Example 2, 3.0 g of N, N- (1,2-dihydroxyethylene) bisacrylamide, 0.1 g of Irgacure 127, 40 g of ethanol, and 10 g of methyl ethyl ketone The resultant was added and mixed uniformly to obtain a conductive polymer paint.
A conductive coating film was formed and evaluated in the same manner as in Example 1 using this conductive polymer coating. The evaluation results are shown in Table 1.

(Example 3)
To 100 g of the PEDOT-PSS aqueous solution obtained in Production Example 2, 0.3 g of N, N-methylenebisacrylamide, 3.0 g of N-hydroxyethylacrylamide, 0.1 g of Irgacure 127, and 50 g of ethanol were added. The mixture was uniformly mixed to obtain a conductive polymer paint.
A conductive coating film was formed and evaluated in the same manner as in Example 1 using this conductive polymer coating. The evaluation results are shown in Table 1.

Example 4
To 100 g of the PEDOT-PSS aqueous solution obtained in Production Example 2, 0.3 g of N, N-methylenebisacrylamide, 3.0 g of N-hydroxyethylacrylamide, 0.05 g of butyl garlic acid, 0.1 g of Irgacure 127 and 40 g of ethanol and 10 g of methyl ethyl ketone were added and mixed uniformly to obtain a conductive polymer paint.
A conductive coating film was formed and evaluated in the same manner as in Example 1 using this conductive polymer coating. The evaluation results are shown in Table 1.

(Example 5)
To 100 g of the PEDOT-PSS aqueous solution obtained in Production Example 2, 0.3 g of N, N-methylenebisacrylamide, 3.0 g of N-hydroxyethylacrylamide, 0.05 g of 2,3,3 ′, 4,4 ′ , 5′-hexahydroxybenzophenone, 0.1 g of Irgacure 127, 40 g of ethanol and 10 g of methyl ethyl ketone were added and mixed uniformly to obtain a conductive polymer paint.
A conductive coating film was formed and evaluated in the same manner as in Example 1 using this conductive polymer coating. The evaluation results are shown in Table 1.

(Comparative Example 1)
The PEDOT-PSS aqueous solution obtained in Production Example 2 was applied as it was on an easy-adhesive polyethylene terephthalate film with a wire coater # 8 and dried by heating in an oven at 100 ° C. for 2 minutes.
The conductive coating film thus obtained was evaluated in the same manner as in Example 1. The evaluation results are shown in Table 1.

The conductive coating films of Examples 1 to 5 formed from a conductive polymer coating containing a π-conjugated conductive polymer, a polyanion, a polyfunctional compound, and a solvent have low initial surface resistivity and excellent conductivity. It was. In addition, the increase rate of the surface resistivity after immersion in hot water and the surface resistivity after standing in a high temperature and high humidity environment with respect to the initial surface resistivity was small, and the hot water resistance and high temperature and high humidity resistance were also excellent. Moreover, transparency was not impaired.
In contrast, the conductive coating film of Comparative Example 1 formed from a conductive polymer paint containing a π-conjugated conductive polymer, a polyanion, and a solvent and not containing a polyfunctional compound had low conductivity. In addition, the crosslink density was low, and the conductive coating film was peeled off after immersion in hot water, and evaluation was not possible. Moreover, the increase rate of the surface resistivity after being left in a high temperature and high humidity environment was large with respect to the initial surface resistivity. That is, the conductive coating film of Comparative Example 1 had low hot water resistance and high temperature and high humidity resistance.

Claims (3)

a π-conjugated conductive polymer, a polyanion, a polyfunctional compound having two or more (meth) acrylamide groups in one molecule, and a solvent ,
The polyfunctional compound is N, N-methylenebis (meth) acrylamide, N, N-ethylenebis (meth) acrylamide, N, N-propylenebis (meth) acrylamide, N, N- (1,2-dihydroxyethyl). A conductive polymer paint characterized by being one of (meth) acrylamides .   The conductive polymer paint according to claim 1, further comprising a conductivity improver.   A conductive coating film formed by applying the conductive polymer paint according to claim 1 or 2 and polymerizing the polyfunctional compound.