JPH11291410A - Antistatic interior material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an antistatic interior material having a superior antistatic property, no lowering of an antistatic ability even in an atmosphere of low humidity or the like, and durability for a long period of time by giving a base material a coat film of polythiophene conductive polymer consisting of specific formula in the presence of a polyanion. SOLUTION: The antistatic interior material is formed by setting an antistatic film formed of a polythiophene conductive polymer on a base material. As a coat composition for forming this antistatic coat film, there is used a dispersant containing a polythiophene conductive polymer consisting of a structural unit corresponding to formula in the presence of at least a polyanion. In the formula, R1 , R2 express hydrogen or a 1-4C alkyl group independently, or show a 1-4C alkyl group that can be substituted together at any time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antistatic interior surface material which has been subjected to an antistatic treatment and is used for interior decoration of buildings, surface decoration of fittings, interior of vehicles, and the like.

[0002]

2. Description of the Related Art As an interior surface material, a material having an antistatic property or a material which prevents adhesion of dust due to charging is known. The following method has been proposed as a conventional means for the above processing. a) For example, those having a coating film of an antistatic agent formed on the surface are known. In particular, when a high antistatic performance is required for the interior material such as a wall of a clean room or the like, there is a method of treating the interior material with a conductive polymer or the like. As such a conductive polymer, for example, polyaniline, polypyrrole, or the like is used. b) In addition, a conductive filler such as a conductive powder or a conductive fiber is kneaded into a base resin. c) Further, a coating of a hydrophilic surfactant or an organopolysiloxane is applied to the surface of the resin substrate. d) In order to prevent dust due to electrostatic charging from adhering to the surface of the interior material, a fluororesin film is bonded to the surface of a decorative sheet such as a polyvinyl chloride sheet.

[0003]

However, in general, light-colored interior materials are often light-colored or have a pattern, but the conductive polymer of the above a) has low transparency. Since the interior material is colored in a deep color, the interior material is treated with a dark conductive polymer, and the color is large, and it is difficult to obtain a white light-colored finish or to utilize the design of the picture. Also, if it is attempted to obtain an interior material by processing within a range that does not impair the light color or the pattern, the amount of use may be reduced by reducing the thickness of the conductive polymer or reducing the content of the conductive polymer in the antistatic coating. There has been a problem that the antistatic property must be reduced and the antistatic property becomes insufficient. In addition, even in the case of an interior material colored other than a light color, since the color of the conductive polymer greatly affects the color, it is difficult to perform color matching and the like, and it takes time and effort to obtain an arbitrary color. However, there is a problem that the variation is easily generated. As described above, the conventional treatment of the conductive polymer has a problem in design and is difficult to manufacture, and is not very practical.

[0004] Further, the conductive fibers and conductive powders of the above-mentioned b) also have a large coloring of themselves, and similarly to the above-mentioned a), the color of the flooring material is restricted. Furthermore, since the conductive filler is present inside the substrate, there is a problem that transparency is insufficient. Further, these conductive fibers and conductive fillers also have a problem that the moldability of the base resin is significantly impaired.
Further, in the case of the surfactant or organopolysiloxane coating film of the above c), there is a drawback that the antistatic performance under low humidity is insufficient because the conductivity greatly depends on the humidity. Further, particularly in the case of a surfactant, there is a disadvantage that it is easily lost by being washed away with water or wiped off with a rag or the like.

In the case of the interior material in which the fluororesin film of the above d) is adhered to the surface, dirt adhering to the surface is easily removed, but it takes time to remove the dirt. Further, since the antistatic treatment is not performed, there is a problem that dirt itself is easily called.

The present invention is excellent in antistatic performance, does not deteriorate even in an atmosphere such as low humidity, has stable antistatic performance for a long period of time, has low coloring, and has high transparency. It is an object of the present invention to provide an antistatic interior material which is excellent in design, excellent in design, and can be manufactured with stable quality.

[0007]

According to the present invention, (1) a coating film of a polythiophene-based conductive polymer having a structural unit corresponding to the following formula (I) in the presence of a polyanion is applied to a substrate. Antistatic interior material characterized by being made.

Embedded image In the formula, R ₁ and R ₂ independently represent hydrogen or a C ₁ -C ₄ alkyl group, or together represent a C ₁ -C ₄ alkylene group which may be optionally substituted.

(2) The antistatic interior material according to (1), wherein the polythiophene-based conductive polymer is obtained by oxidative polymerization of 3,4 ethylenedioxy-thiophene in the presence of polystyrenesulfonic acid.

(3) The antistatic interior material according to the above (1) or (2), wherein the base material is subjected to a decoration treatment. It is the gist.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, the antistatic interior material 1 of the present invention
Is formed by applying an antistatic coating film 2 formed from a polythiophene-based conductive polymer to a base material 3.

In order to apply the antistatic coating 2 to the substrate 3, a means is used in which a coating composition containing a dispersion of a polythiophene-based conductive polymer is applied to form the antistatic coating 2. The antistatic coating film 2 may be applied to any surface of the substrate 3. As an embodiment of the antistatic interior material, for example,
As shown in FIG. 1, the antistatic coating 2
2, the antistatic coating 2 is formed only on the back side of the substrate 3 as shown in FIG. 2, and the antistatic coating 2 is applied on both the front side and the back side of the substrate 3 as shown in FIG. Examples include a mode in which the film 2 is provided, and a mode in which the antistatic coating film 2 is sandwiched between a plurality of base materials 3 as shown in FIG. Alternatively, the antistatic coating film 2 may be provided directly on the surface of the base material 3 or may be provided on a decorative layer or the like provided on the surface of the base material described later.

The antistatic coating 2 may be composed of only a polythiophene-based conductive polymer alone or may contain another resin binder. In the antistatic coating 2, pigments and pigments are added as long as the antistatic performance is not impaired.
Various additives such as dyes, matting agents, surfactants, ultraviolet absorbers, stabilizers, and silane coupling agents may be contained. It is preferable that the antistatic coating film 2 has a thickness of about 0.1 to 10 μm.

As a coating composition for forming the antistatic coating film 2, a dispersion containing at least a polythiophene-based conductive polymer having a structural unit corresponding to the following formula (I) in the presence of a polyanion: Is used.

[0014]

Embedded image In the formula, R ₁ and R ₂ independently represent hydrogen or a C ₁ -C ₄ alkylene group, or together may be a C ₁ -C ₄ alkylene group which may be optionally substituted, preferably an optionally substituted alkyl group. Optionally a methylene group, optionally C ₁
-C ₁₂ -alkyl or phenyl-substituted 1,2-ethylene group, 1,3-propylene group or 1,
Represents a 2-cyclohexylene group.

All methyl and ethyl groups are represented by R ₁
And a C ₁ -C ₄ alkyl groups relative to R _2.

R ₁ and R ₂ may together form
Suitable representatives of optionally substituted C ₁ -C ₄ alkylene groups include α-olefins such as ethene, prop-
1,2-Derived from 1-ene, hex-1-ene, oct-1-ene, des-1-ene, dodes-1-ene, and 1,2-dibromoalkane obtained by bromination of styrene. There is an alkylene group. Other representatives include 1,2
-Cyclohexyl, 2,3-butylene, 2,3-dimethyl-2,3-butylene and 2,3-pentylene groups.

Preferred R ₁ and R ₂ are methylene, 1,2-
Ethylene, 1,3-propylene and the like;
-Ethylene groups are particularly preferred.

The polyanion is provided by a polyacid or an alkali salt thereof. Examples of the polyacid include high molecular carboxylic acids such as polyacrylic acid, polymethacrylic acid, and polymaleic acid, and polysulfonic acids such as polystyrenesulfonic acid and polyvinylsulfonic acid. These polycarboxylic acids and polysulfonic acids may be copolymers of vinylcarboxylic acid and vinylsulfonic acid with other copolymerizable monomers such as acrylate or styrene.

The molecular weight of the polyacid is preferably from 1,000 to
It is in the range of 2 million, more preferably in the range of 2000 to 500,000. As the polyacid or an alkali salt thereof, commercially available polystyrene sulfonic acid or polyacrylic acid, or one produced by a known method is used.

The dispersion containing the polythiophene-based conductive polymer can be prepared, for example, by adding 3,4-dialkoxythiophene represented by the following formula (II) to an oxidizing agent used for oxidizing pyrrole in the presence of the above polyacid; By oxidative polymerization at a temperature of 0 ° C. to 100 ° C. in an aqueous medium or the like using air, oxygen, or the like, a dispersion or latex in which a polythiophene-based conductive polymer becomes a salt with a polyacid and is dispersed in a solvent is obtained. can get. Specifically, thiophene, polyacid, oxidizing agent and the like are dissolved in an organic solvent or preferably water, and the mixture is stirred at a predetermined polymerization temperature until the reaction is completed.

[0021]

Embedded image Wherein R ₁ and R ₂ are the same as defined in formula (I).

The oxidizing agent is described in J. Am. Soc. 85 , 4
54 (1963) suitable for oxidative polymerization of pyrrole. Preferred oxidizing agents include Fe
Cl ₃ , Fe (ClO ₄ ) ₃ and iron (III) salts of organic acids and inorganic acids containing organic residues, H ₂ O ₂ , K ₂ Cr ₂ O
_7. Alkali or ammonium persulfate, alkali perborate, potassium permanganate and salts thereof such as copper tetrafluoroborate are inexpensive, noncorrosive and easy to handle.
In addition, the addition of a catalytic amount of metal ions, such as iron, cobalt, nickel, molybdenum and vanadium ions, as the oxidizing agent, can effectively utilize air and oxygen.

The iron (III) salt of an inorganic acid containing an organic residue includes iron (II) of a sulfuric acid half ester of a C ₁ -C ₂₀ alkanol.
I) Salts. Iron (III) salts of organic acids include C ₁ -C ₂₀ alkyl sulfonic acids such as methane or dodecanesulfonic acid, aliphatic C ₁ -C ₂₀ carboxylic acids such as 2-ethylhexyl carboxylic acid, trifluoroacetic acid, perfluoroacetic acid and the like. Aliphatic perfluorocarboxylic acids such as octanoic acid, aliphatic dicarboxylic acids such as oxalic acid, benzenesulfonic acid,
p- toluenesulfonic acid, aromatic optionally C ₁ -C ₂₀ of dodecyl benzene sulfonic acid - alkyl-substituted sulfonic acid, Fe (III) salts and the like. Further, the above mixture may be used.

The oxidizing agent must be added in an amount of 2.25 equivalents per mole of thiophene, but is preferably used in an excess of 0.1 to 2 equivalents. When a weakly acidic polysalt such as polyacrylic acid is used as the polyacid, it is effective to add a strong monoacid such as hydrochloric acid, sulfuric acid, or aromatic sulfonic acid to increase the polymerization rate.

The amount of the polyacid added is such that the acid group of the polyacid is 0.25 to 10 per 1 mol of thiophene corresponding to the formula (II).
, Preferably 0.8 to 8 are present.

The amount of the solvent is 0.58 to 55% by weight, preferably 5 to 3% by weight, of the thiophene and the polyacid corresponding to the formula (II).
It is preferred to use a solids content of 0% by weight. Making the polythiophene dispersions, -SO ₃ ^-,
-COO ^-, and -PO polymer latex containing an acid group as a ^2- or can be carried out in the presence of a polymerization dispersion, and the content of acidic groups, in order to ensure sufficient stability of the dispersion It is preferable to use 2% by weight or more.

The polythiophene-based conductive polymer dispersion may be dissolved in water such as polyvinyl alcohol, polyvinyl acetate, and other dispersants to improve the adhesion and scratch resistance of the antistatic coating. Alternatively, a suspendable resin binder or the like can be added.

The dispersion of the polythiophene-based conductive polymer can be neutralized by adding an alkali or alkaline earth hydroxide, ammonia or an amine to neutralize an excess of an advantageous acid. It is preferable because the construction equipment can be protected from corrosion.

The dispersion or latex of the polythiophene-based conductive polymer may be any of linear, branched or cross-linked polymers. A latex of a crosslinked polymer having a large amount of acidic groups is swellable in water and is called a microgel.

A dispersion of a polythiophene-based conductive polymer (hereinafter also including latex) is disclosed in JP-A-7-90060.
Can be manufactured by the method described in Japanese Patent Application Publication No. One example of the manufacturing method is described below. In 200 ml of water to which 1.2 g of potassium persulfate was added, polystyrenesulfonic acid (Mw 40
00) 10.0 g and 3,8.9 g of 3,4-ethylenedioxy-thiophene are added with stirring and the mixture is stirred at room temperature for a further 24 hours. Next, the dispersion was diluted with 300 ml of water to obtain a polythiophene (P) having a structure represented by the following formula (III).
A dispersion of EDT) / polystyrenesulfonic acid (PSS) (content: 2.6% by weight) is obtained.

Embedded image

As such a dispersion of the polythiophene-based conductive polymer, for example, “Bytron P” commercially available from Bayer AG can be used. “BytronP” is Polyethylene di
Thiophene polystyrene sulp
honate dispersion, and “Bytr” in Table 1 below.
onP ". FIG. 5 shows the transmittance of a coating film obtained by applying “Bytron P” to polycarbonate.
"Bytron P" to which polyvinyl acetate resin is added
FIG. 6 is a graph showing the change in the surface resistance at room temperature of the coating film coated with polycarbonate on polypyrrole to which polyvinyl acetate resin was added.
FIG. 7 shows a graph comparing the change with time of the surface resistance under steam at a temperature of ° C. with that of polypyrrole to which polyvinyl acetate resin was added.

The polythiophene-based conductive polymer (By)
tronP) is compared in performance with other antistatic agents as shown in Table 2 below. In general, conductive polymers such as polyaniline and polythiol as antistatic agents are listed in Table 2.
As shown in (1), compared to surfactants, conductive fine particles, metal thin films, etc., they are superior in terms of conductivity, humidity dependency, transparency, and the like, but have a drawback that they have large coloring. On the other hand, the above-mentioned polythiophene-based conductive polymer has excellent coloring properties in addition to excellent properties similar to those of the above-mentioned general conductive polymer.

[0033]

[Table 1]

[0034]

[Table 2]

The coating method for applying the coating composition of the dispersion of the polythiophene-based conductive polymer to the substrate may be a known coating method such as roll coating, gravure coating, curtain coating, and slide coating. Can be. After coating, the solvent may be left to dry, but it is preferable to remove the solvent by heating to 20 to 150 ° C, preferably 40 to 100 ° C.

As the base material, any base material for various interior materials can be used. Specific materials include thermoplastic resins,
Resin such as thermosetting resin, leather, paper, nonwoven fabric, wood, metal, ceramics, non-ceramic ceramic materials and the like. The shape of the substrate is sheet (film), foil,
Any of a plate-like body such as a flat plate and a curved plate, and a three-dimensional shape may be used.

As the thermoplastic resin used for the base material,
Polyethylene, polypropylene, polymethylpentene,
Polyolefin resin such as olefin-based thermoplastic elastomer, polyvinyl chloride resin, polyvinylidene chloride, polyvinyl alcohol, vinyl chloride-vinyl acetate copolymer,
Ethylene-vinyl acetate copolymer, vinyl resin such as vinylon, polyester resin such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate-isophthalate copolymer, polymethyl methacrylate, polyethyl methacrylate, polyacryl Acrylic resin such as methyl acrylate, polybutyl acrylate, polyamide such as nylon 6, nylon 66, cellulose resin such as cellulose triacetate, cellophane, PVF, PVDF
Fluororesin, polycarbonate, polystyrene, A
Examples include BS, polyarylate, polyimide, and silicon resin.

As the thermosetting resin used for the base material,
Phenolic resin, urea resin, diallyl phthalate resin,
Melamine resin, melamine-urea co-condensation resin, guanamine resin, unsaturated polyester resin, polyurethane resin (2
Liquid polyurethane resin), epoxy resin, amino alkyd resin and the like.

As the paper used for the base material, thin paper, kraft paper, titanium paper, linter paper, paperboard, gypsum board paper, so-called vinyl wallpaper raw material obtained by sol-coating or dry laminating a polyvinyl chloride resin on paper, high-quality paper Paper, coated paper, art paper, parchment paper, glassine paper, parchment paper,
Examples include paraffin paper, Japanese paper, and resin-impregnated paper.

As a paper-like sheet used for the base material,
A woven or nonwoven fabric of inorganic fibers such as glass fiber, asbestos, potassium titanate fiber, alumina fiber, silica fiber, and carbon fiber, and a woven or nonwoven fabric of organic fibers such as polyester and vinylon are exemplified.

As the wood used for the base material, cedar, cypress,
Single veneer, plywood, glulam, made of trees such as lauan and teak
Particle board and medium density fiberboard (MDF) are mentioned. Examples of the metal include iron, aluminum, and copper having a resin film or sheet laminated on the surface. These normal metals themselves are conductive, so when used alone,
Although the coating of the conductive polymer specified in the present invention is unnecessary,
When an electrically insulating layer is provided on the surface, the substrate becomes the target substrate of the present invention. Ceramics include glass, pottery, porcelain,
Examples include pottery and earthenware. Non-ceramic ceramic materials include gypsum, calcium silicate, cement and the like.

The substrate may be a single layer of the above-mentioned materials, or a composite substrate composed of a laminate of two or more layers laminated by an appropriate means such as an adhesive or heat fusion. .

In the antistatic interior material of the present invention, a decoration treatment can be applied to the substrate. The decoration treatment includes kneading of a coloring agent into the base material itself, pattern printing, formation of a metal thin film pattern, embossing (heating press), and shaping of an uneven pattern such as hairline processing. These patterns may be provided on the entire surface of the substrate or on a part thereof.

As the pattern printing, a pattern is formed by ink (or paint) using a known printing method such as gravure printing, offset printing, silk screen printing, and transfer printing from a transfer sheet. Examples of the pattern include a wood grain pattern, a stone grain pattern, a squeezed pattern, a geometric figure, a character, a symbol, and a solid surface. The pattern is the surface of the substrate, the back side, both sides,
Alternatively, if a plurality of base materials are laminated, they can be provided in the middle of the base materials. As the above ink,
Chlorinated polyolefins such as chlorinated polyethylene and chlorinated polypropylene, polyesters, polyurethanes, acrylic resins, polyvinyl acetate, vinyl chloride / vinyl acetate copolymers, cellulose-based resins, etc. Known binders such as titanium white, carbon black, red iron oxide, ultramarine, graphite, quinacridone, isoindolinone, phthalocyanine blue, etc.
It is constituted by adding a coloring agent such as a dye.

The embossing is performed by heating and softening a base material such as a thermoplastic resin, pressurizing and shaping with an embossed plate, and cooling and fixing the embossed shape. A known sheet-fed or rotary embossing machine is used. Can be used for processing. Examples of the concavo-convex shape provided by embossing include a wood channel groove, a stone plate surface concavo-convex (for example, a granite cleavage plane), a cloth surface texture, a matte finish, a grain, a hairline, a linear groove, and the like.

The concave portions of the concavo-convex pattern formed by embossing are colored ink (or colored paint) by a known wiping method (disclosed in Japanese Patent Publication No. 58-14312).
May be filled. The ink used in the wiping method is constituted by using the following resin as a vehicle, and adding a coloring agent, an extender pigment such as precipitated barium sulfate, a plasticizer, and the like. Vehicles for the wiping ink include, for example, nitrocellulose, acetylcellulose, ethylcellulose, cellulose derivatives such as benzylcellulose, phenolic resins, urea resins, melamine resins, polyvinyl acetate resins, polyvinyl chloride resins, acrylic resins, Examples thereof include polyvinyl alcohol, polyvinyl butyral, epoxy resin, silicone resin, polyester resin, polyamide resin, polyurethane resin, and other synthetic resins.

The wiping ink is coated on the entire surface including the concave portion of the sheet by roll coating or knife coating, and then scraped off with a doctor blade or wiping paper to remove the ink coated on the convex portion of the sheet. Can be filled with the coloring ink only. In addition, the viscosity of the ink composition, the number of rotations of the roll, the blade angle of the doctor, the thickness, the sheet speed,
By adjusting the speed of the wiping paper, the hardness of the rubber roll, and the like, only the concave portion can be filled with the ink. For example, the color tone of the wiping ink is preferably the same or similar to that of the conduit in the case of a wood pattern, and is preferably the same or similar to that of a crack in the case of a stone pattern.

The pattern layer of the metal thin film is formed by using a metal such as aluminum, chromium, gold, silver, copper or the like, and forming the film by a method such as vacuum deposition or sputtering.

When a polyolefin resin sheet or the like is used as the substrate, an easy adhesion treatment may be performed before printing on the surface of the substrate in order to improve the adhesion to a printed pattern or the like. Easy adhesion treatment is the application of an easy adhesion layer to the surface of the substrate,
Corona discharge treatment, plasma treatment and the like. The easy-adhesion layer is called a primer layer or an anchor layer, and is made of acrylic resin, polyester, vinyl chloride-vinyl acetate copolymer, polyurethane, chlorinated polypropylene, chlorinated polyethylene, or the like. It is preferable to use a chlorinated polyolefin, polyurethane, or the like for the easy-adhesion layer of the substrate such as a polyolefin-based resin sheet. Also, with other binders, sufficient adhesion can be imparted by appropriately selecting an easy-adhesion primer and treating the substrate.

The antistatic interior material of the present invention is used for walls, floors,
Building interior materials such as ceilings, interior partitions (walls), window frames, door frames, handrails, door knobs, handles, doors and other fittings, vehicle interior materials, ship interior materials, chests, desks, tables, etc. Surface materials for furniture, home appliances such as TV receivers and audio equipment, surface materials for OA equipment, and other surface materials.

[0051]

Example 1 A flame-retardant backing paper for wallpaper having a basis weight of 80 g / m ² was used as a base material,
A polyvinyl chloride (PVC) plastisol having the following composition was applied on a surface of the base material using a comma coater, heated and solidified, and a soft white PVC layer having a thickness of 180 μm was provided. On the other hand, a 25 μm-thick biaxially stretched polyethylene terephthalate (PET) sheet was coated with an emulsion of a polythiophene-based conductive polymer having the following composition at 100 ° C.
The water was dried in 0 minutes to form a film (a coating amount of 0.1 g / m ²
dry). Two-part curable urethane adhesive (100 parts by weight of acrylic polyol and tolylene diisocyanate 1)
0 parts by weight: 10 μm in thickness), laminated on the soft white PVC layer of the base material, bonded and integrated,
An antistatic wallpaper having a surface coated with a polythiophene-based conductive polymer was obtained.

Example 2 A flame-retardant backing paper for wallpaper having a basis weight of 80 g / m ² was used as a base material,
A polyvinyl chloride (PVC) plastisol having the following composition was applied on a surface of the base material using a comma coater, heated and solidified, and a soft white PVC layer having a thickness of 180 μm was provided. Further, in order to prevent bleeding of the plasticizer on the surface of the soft white PVC layer, a biaxially stretched polyethylene terephthalate (PET) sheet having a thickness of 12 μm is coated with a two-component curable polyurethane adhesive (100 parts by weight of acrylic polyol and tolylene diisocyanate 10 parts by weight). (Parts by weight: 10 μm in thickness). On the other hand, an emulsion of a thiophene-based conductive polymer having the following composition was applied to the back surface of a biaxially stretched PET sheet having a thickness of 25 μm, and water was dried at 100 ° C. for 10 minutes to form a coating film (a coating amount of 0.1 g). / M ² dry).
The PET sheet is laminated on the soft white PVC layer of the base material via the two-component curable urethane adhesive on the back surface (the surface of the conductive polymer coating film), and bonded and integrated to form a polythiophene-based conductive material. An antistatic wallpaper having a coating of a conductive polymer was obtained.

Comparative Example 1 A flame-retardant backing paper for wallpaper having a basis weight of 80 g / m ² was used as a base material,
A polyvinyl chloride (PVC) plastisol having the following composition is coated on a surface of the base material with a comma coater, heated and solidified, and a soft white PVC layer having a thickness of 180 μm is provided.
A 5 μm biaxially stretched polyethylene terephthalate sheet is coated with a two-component curable urethane adhesive (acrylic polyol 100
10 parts by weight of tolylene diisocyanate added to 10 parts by weight of the base material:
A wallpaper was obtained by laminating on the VC layer and bonding and integrating.

[PVC plastisol composition] 100 parts by weight of polyvinyl chloride (manufactured by Zeon Corporation: G-121) 60 parts by weight of plasticizer: 60 parts by weight of dioctyl phthalate 30 parts by weight of calcium carbonate powder 10 parts by weight of pigment: titanium white powder Heat stabilizer 4 parts by weight ・ Diluent

[Polythiophene-based conductive polymer emulsion composition] 82 parts by weight of polythiophene dispersion (Baytron P manufactured by Bayer) 18 parts by weight of polyester resin (Finetex ES-850 manufactured by Dainippon Ink Industries, Ltd.) 18 parts by weight of solvent (water) / IPA = 3/1 weight ratio) 7 parts by weight

[Antistatic Performance Test] The antistatic performance tests of the wallpapers of Examples 1 and 2 and Comparative Example 1 were performed. In the test, the surface resistivity after the initial and after surface wear was measured and compared. The surface resistivity is measured with a high resistivity meter (Mitsubishi Yuka: Hirest)
aIP), applied voltage 100 V, measurement environment 20 ° C. 6
Performed at 0% RH. The surface was worn using a Gakushin-type abrasion tester in accordance with the method described in the standard of JISL-1084, and was worn by reciprocating 100 times with a load of 2N using Kanakin No. 3 as a cloth. Table 3 shows the test results.

[0057]

[Table 3] *: Scale over

[0058]

As described above, the antistatic interior material of the present invention employs a structure in which a coating film of a specific polythiophene-based conductive polymer is applied to a base material. Is excellent in antistatic performance, the antistatic performance does not decrease even in an atmosphere such as low humidity, and an antistatic interior material having stable antistatic performance can be obtained. In addition, the coating film of the polythiophene-based conductive polymer has low coloring compared to other conductive polymers and has good transparency and the like, so that an antistatic interior material having a white light-colored finish can be easily obtained. In this case, color matching is easy, and an antistatic interior material excellent in design can be obtained. Further, a stable quality antistatic interior material can be easily produced without color variation or the like. In addition, since the antistatic layer is formed on the interior material as a coating film of a conductive polymer, there is no danger of dust being generated due to generation of powder or the like, and the interior material can be favorably used in a clean room or the like.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of an antistatic interior material of the present invention.

FIG. 2 is a sectional view showing an example of the antistatic interior material of the present invention.

FIG. 3 is a sectional view showing an example of the antistatic interior material of the present invention.

FIG. 4 is a sectional view showing an example of the antistatic interior material of the present invention.

FIG. 5 is a graph showing the transmittance of a polythiophene-based conductive polymer coating film.

FIG. 6 is a graph showing the change over time in the surface resistivity of a polythiophene-based conductive polymer coating film at room temperature.

FIG. 7 is a graph showing the change over time in the surface resistivity of a polythiophene-based conductive polymer coating film under steam at 100 ° C.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Antistatic interior material 2 Polythiophene conductive polymer antistatic coating 3 Substrate

Claims (3)

[Claims] 1. Formula (I) in the presence of a polyanion
An antistatic interior material, wherein a base material is coated with a coating film of a polythiophene-based conductive polymer having a structural unit corresponding to: Embedded image In the formula, R ₁ and R ₂ independently represent hydrogen or a C ₁ -C ₄ alkyl group, or together represent a C ₁ -C ₄ alkylene group which may be optionally substituted. 2. The polythiophene-based conductive polymer is obtained by oxidative polymerization of 3,4 ethylenedioxy-thiophene in the presence of polystyrene sulfonic acid.
Antistatic interior material as described. 3. A decoration treatment is applied to a base material.
Or the antistatic interior material according to 2.