KR101958203B1

KR101958203B1 - Dispersion solution of pedot/pss, the photocurable antistatic coating composition comprising thereof, and dust collector comprising thereof

Info

Publication number: KR101958203B1
Application number: KR1020160112969A
Authority: KR
Inventors: 김인선; 임성택; 염은희; 이승조
Original assignee: 주식회사 포리스
Priority date: 2016-09-02
Filing date: 2016-09-02
Publication date: 2019-03-14
Also published as: KR20180026057A; WO2018043807A1

Abstract

The present invention relates to a PEDOT / PSS dispersion, a photocurable antistatic coating composition made from the dispersion, and a dust collector comprising the coating composition, wherein the powder is in the form of a solid powder of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid PEDOT / PSS), a chemically stable PEDOT / PSS dispersion with high light transmittance and low surface resistance, a photocurable antistatic coating composition made of the dispersion, .

Description

DISPERSION SOLUTION OF PEDOT / PSS, PHOTOCURABLE ANTISTATIC COATING COMPOSITION COMPRISING THEREOF, AND DUST COLLECTOR COMPRISING THEREOF COMPRISING THE POTENTIAL SOLUTION OF PEDOT / PSS,

The present invention relates to a dust collecting container comprising a PEDOT / PSS dispersion, a photocurable antistatic coating composition made of the dispersion, and an antistatic coating film formed using the coating composition, wherein the particulate poly (3,4- (PEDOT / PSS), which is capable of forming an antistatic coating film having high light transmittance and low surface resistance and which is chemically stable, a light-curing type An antistatic coating composition, and an antistatic coating film formed using the coating composition.

There are various kinds of antistatic agents for preventing static electricity. For example, carbon black (Carbon black), surfactant (Surfactant), metal salt compound, and conductive polymer may be used. Among them, the conductive polymer has advantages such as good conductivity and stability and is actively used as a raw material for various antistatic agents. When the conductive polymer is used alone, it is usually used together with a dopant due to a low solubility in a solvent, a strong aggregation phenomenon, and a lack of conductivity. A representative example is poly (3,4-ethylenedioxythiophene, hereinafter referred to as PEDOT). PEDOT is used as a water-soluble or water-dispersible mixture with polystyrene sulfonic acid (PSS) as a dopant. Commercially available PEDOT / PSS complexes include Heraeus Clevios and Agfa Orgacon. Nearly all PEDOT / PSS commercial products are provided in water dispersion and antistatic agents using PEDOT / PSS are manufactured and marketed using water-based materials such as water-dispersed polyurethane. However, raw materials such as water-dispersed polyurethane are difficult to maintain high solids due to their inherent limitations and have drawbacks such as low pencil hardness after coating, low ultraviolet stability, and vulnerability to moisture.

Recently, a mixed coating agent in which an organic solvent is mixed with a water-dispersed PEDOT / PSS raw material and an organic polymer exhibiting high stability and hardness is used as a binder has been developed. These materials are commonly used as antistatic agents due to the limit of conductivity. However, due to the fundamental limitations of the water dispersion system, namely, low pencil hardness and low stability, the application field has not been widened.

According to Patent Document WO 2008/022908, a conductive polymer solution having a moisture content of 30% or less was prepared by using a solvent exchange technique on a PEDOT / PSS mixture synthesized as an aqueous dispersion, and then a resin such as ultraviolet- Ultraviolet ray hardening type antistatic agent "because the solvent exchange process of the PEDOT / PSS mixture prepared in the form of an aqueous dispersion must be accompanied, there is a risk that the moisture content is not completely controlled and it is not suitable for mass production .

According to Korean Patent No. 10-1447473, a process of adding water and an organic solvent capable of mixing with water to a PEDOT / PSS mixture synthesized as a water dispersion and filtering the water may be carried out in various stages to minimize the water content have. According to the patent, a dispersion aid (mainly an acrylic copolymer) having a hydroxyl value in a specific range is added to a PEDOT / PSS mixture provided as an aqueous dispersion to obtain a stable dispersion, and then a water- The process of adding and filtering the filter should be performed in several steps. This technique is disadvantageous in that a specific kind of acrylic copolymer must be used and it is not easy to add a separate binder or the like to add functionality.

According to the patent document EP 1309646B1, a solid state PEDOT / PSS mixture having a moisture content of 15 to 20% can be provided by freeze drying the PEDOT / PSS mixture synthesized as an aqueous dispersion. With this solid state PEDOT / PSS mixture, a water-free photocurable antistatic coating can be provided. However, in the concrete examples, it is proposed to prepare a coating composition by again dispersing the solid state PEDOT / PSS mixture prepared above, and it is proposed to manufacture a photocurable antistatic coating composition in which PEDOT / PSS is dispersed in an organic solvent .

According to Patent Document KR 10-1341049, a process for preparing a photocurable antistatic coating composition in which the water content is minimized by redispersing the solid state PEDOT / PSS mixture prepared by the process provided in patent document EP 1309646B1 in an organic solvent . In order to redisperse the PEDOT / PSS mixture in the solid state, the content of high boiling point solvents such as Dimethysulfoxide (DMSO), Ethyleneglycol (EG), and Foramide (FA) should be more than 90% by mass. When the above solvent is used as a main dispersion solvent, problems such as inadequacy of working environment due to excessive use of toxic substances may occur. When used as a raw material for an antistatic coating composition, a high content of a high boiling solvent It may be difficult to control the process. In addition, in the case of solvents such as DMSO and EG, since the natural moisture content is high, uncontrolled moisture may be contained.

It is an object of the present invention to provide an antistatic coating film which can be produced by using poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) in the form of solid powder and having high light transmittance and low surface resistance And a chemically stable PEDOT / PSS dispersion, a photocurable antistatic coating composition prepared from the dispersion, and an antistatic coating film formed using the coating composition.

According to an aspect of the present invention, there is provided a process for preparing a mixed solvent, comprising: mixing a solvent and an organic solvent to prepare a mixed solvent; And a second mixing step of mixing the mixed solvent with poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) in the form of solid powder. The poly (3,4-ethylenedioxythiophene ) -Polystyrenesulfonic acid (PEDOT / PSS) dispersion.

In the present invention, after the second mixing step, a mixed solution of the mixed solvent and poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) is dispersed and mixed by shear force by a high shear mixer And a high-shear mixer step for producing a second mixed solution.

In the present invention, the bead mill may further comprise, after the high shear mixer step, performing the additional dispersion on the bead mill with the second mixed solution.

In the present invention, the dispersion aid is a first dispersion aid for assisting dispersion of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) in solid powder form; And a second dispersion aid for improving the conductivity when the dispersion is coated.

In the present invention, the first dispersion aid contains at least one of amines (Amines), acrylates (Acrylates) and polyols (Polyols), and the second dispersion aid is a diethylene glycol Propylene glycol, tetramethylene glycol, sorbitol, N, N-dimethylformamide, ethylene glycol, N, N-dimethylacetate, N, N-dimethylacetamide, acetonitrile, dimethylsulfoxide, glycerol, ethylene cyanide, formic acid, propylene carbonate, ethylene carbonate for example, at least one of ethylene carbonate, ethylene carbonate, 2,6-difluoropyridine, formamide, and N-methylformamide.

In the present invention, the amount of the poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) is from 0.5 to 2.0% by weight, the organic solvent is from 80 to 97% by weight, % &Lt; / RTI >

Disclosure of the Invention In order to solve the above-mentioned problems, the present invention provides a process for producing a poly (3,4-ethylenedioxythiophene) -poly (styrenesulfonic acid) (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) prepared by mixing poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) / PSS) dispersion.

In the present invention, dispersion and mixing of the organic solvent, dispersion auxiliary agent and poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) by a high shear mixer can be performed by shear force.

In the present invention, after dispersion and mixing of the organic solvent, dispersion aid and poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) by a high shear mixer are performed, Additional dispersion can be performed.

Disclosure of the Invention In order to solve the above-mentioned problems, the present invention relates to a process for producing a poly (3,4-ethylenedioxythiophene) -polystyrene sulfonate (PEDOT / PSS) Or dispersing and mixing by shear force, and then performing additional dispersion on the bead mill to produce a dispersion; Preparing a first coating mixture solution by mixing the dispersion, the additional organic solvent, the curable binder, and the additive to prepare a coating mixture; And a coating liquid preparation step of preparing a coating composition by dispersing and mixing the coating liquid by a shear force by a high shear mixer to produce a coating composition.

In the present invention, the step of preparing the first coating mixture may include a step of preparing a pre-coating mixture by mixing an additional organic solvent, a curable binder, and an additive to prepare a pre-coating mixture; And a dispersion liquid mixing step of mixing the dispersion liquid with the pre-coating mixture liquid.

In the present invention, the coating composition comprises 0.1 to 2.0 wt% of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS), 1.05 to 14 wt% of a dispersing aid, 60 to 95 wt% 1 to 40% by weight of a curable binder, and 0.01 to 3% by weight of an additive.

In the present invention, the dispersion aid is a first dispersion aid for assisting dispersion of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) in solid powder form; And a second dispersion aid for improving the conductivity when the dispersion is coated, wherein the first dispersion aid is one or more of amines (amines), acrylates (acrylates), and polyols Wherein the second dispersion aid is selected from the group consisting of diethylene glycol, propylene glycol, tetramethylene glycol, sorbitol, N, N-dimethylformamide (N, N-dimethylformamide) dimethylformamide, ethylene glycol, N, N-dimethylacetamide, acetonitrile, dimethylsulfoxide, glycerol, ethylene cyanide, Formic acid, propylene carbonate, ethylene carbonate, 2,6-difluoropyridine, formamide, and N-methylformamide (N -methylformamide) Wherein the first dispersion aid is 0.5 to 2.0 wt%, and the second dispersion aid is 1 to 10 wt%.

In order to solve the above-mentioned problems, the present invention provides a method for producing a curable resin composition, which comprises adding an organic solvent, a curing binder, an organic solvent, a dispersion aid, and a poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) , And additives, and performing dispersion and mixing by shear force.

In the present invention, the coating composition comprises 0.1 to 2.0 wt% of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS), 1.05 to 14 wt% of a dispersion aid, 60 to 95 wt% 1 to 40% by weight of a curable binder, and 0.01 to 3% by weight of an additive.

In the present invention, the dispersion aid is a first dispersion aid for assisting dispersion of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) in solid powder form; And a second dispersion aid for improving the conductivity when the dispersion is coated, wherein the first dispersion aid is one or more of amines (amines), acrylates (acrylates), and polyols Wherein the second dispersion aid is selected from the group consisting of diethylene glycol, propylene glycol, tetramethylene glycol, sorbitol, N, N-dimethylformamide (N, N-dimethylformamide) dimethylformamide, ethylene glycol, N, N-dimethylacetamide, acetonitrile, dimethylsulfoxide, glycerol, ethylene cyanide, Formic acid, propylene carbonate, ethylene carbonate, 2,6-difluoropyridine, formamide, and N-methylformamide (N -methylformamide) . &Lt; / RTI >

In the present invention, the first dispersion aid may be 0.5 to 2.0 wt%, and the second dispersion aid may be 1 to 10 wt%.

According to an aspect of the present invention, there is provided a dust collecting container for use in a vacuum cleaner, the dust collecting container including a casing part and a coating layer provided on an inner wall of the casing part, 0.1 to 2.0% by weight of a dispersant aid, 1.05 to 14% by weight of a dispersion aid, 60 to 95% by weight of an organic solvent, 1 to 40% by weight of a curing binder, 0.01 to 3% by weight of an additive, And a dust collecting container.

In the present invention, the dispersion aid is a first dispersion aid for assisting dispersion of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) in solid powder form; And a second dispersion aid for improving the conductivity when the dispersion is coated, wherein the first dispersion aid comprises one or more of Amines, Acrylates, and Polyols, and the second dispersion aid comprises diethylene glycol Diethylene glycol, propylene glycol, tetramethylene glycol, sorbitol, N, N-dimethylformamide, ethylene glycol, N, N - N, N-dimethylacetamide, acetonitrile, dimethylsulfoxide, glycerol, ethylene cyanide, formic acid, propylene carbonate, , At least one of ethylene carbonate, 2,6-difluoropyridine, formamide, and N-methylformamide, The dispersion aid was 0.5 To 2.0% by weight, and the second dispersion aid may be 1 to 10% by weight.

The dispersion according to an embodiment of the present invention can be applied to various types of coating compositions and can exhibit an effect that can be utilized in a photocurable coating composition having excellent surface hardness, weather resistance, chemical resistance and water resistance.

The coating composition according to one embodiment of the present invention can be coated on various kinds of substrates to exhibit an effect of realizing an antistatic function.

The dust collecting container according to an embodiment of the present invention can exert an effect of shedding high antistatic function and high transparency.

In the dust collecting container according to an embodiment of the present invention, when dust is removed from the dust collecting container, no dust is accumulated on the dust, so that the dust in the dust collecting container can be prevented from further contamination due to static electricity Can be exercised.

In the dust collecting container according to an embodiment of the present invention, the risk of explosion, which may be caused by static electricity, and discomfort when the user touches the user can be eliminated.

When the coating composition according to an embodiment of the present invention is applied to a dust collecting container of a cyclone vacuum cleaner, the dust inside the dust collecting container is entangled with each other and rotates inside the dust collecting container due to the nature of the vacuum cleaner, At this time, since the charge is not accumulated in the dust due to the antistatic effect by the coating composition, the electrostatic repulsion force is removed, so that the gap between the dusts gathered becomes dense, and the antistatic- It is possible to exhibit an effect of storing more dust than the dustbin.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a diagram schematically illustrating steps of a method for preparing a dispersion of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) according to an embodiment of the present invention.
Figure 2 is a schematic illustration of steps of a method of making a coating composition according to one embodiment of the present invention.
3 is a schematic view illustrating a three-dimensional view of a dust collecting container according to an embodiment of the present invention.
4 is a cross-sectional view of a dust collector according to an embodiment of the present invention.

Various embodiments and / or aspects are now described with reference to the drawings. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more aspects. However, it will also be appreciated by those of ordinary skill in the art that such aspect (s) may be practiced without these specific details. The following description and the annexed drawings set forth in detail certain illustrative aspects of one or more aspects. It is to be understood, however, that such aspects are illustrative and that some of the various ways of practicing various aspects of the principles of various aspects may be utilized, and that the description set forth is intended to include all such aspects and their equivalents.

As used herein, the terms "an embodiment," "an embodiment," " an embodiment, "" an embodiment ", etc. are intended to indicate that any aspect or design described is better or worse than other aspects or designs. .

In addition, the term "or" is intended to mean " exclusive or " That is, it is intended to mean one of the natural inclusive substitutions "X uses A or B ", unless otherwise specified or unclear in context. That is, X uses A; X uses B; Or when X uses both A and B, "X uses A or B" can be applied to either of these cases. It should also be understood that the term "and / or" as used herein refers to and includes all possible combinations of one or more of the listed related items.

It is also to be understood that the term " comprises "and / or" comprising " means that the feature and / or component is present, but does not exclude the presence or addition of one or more other features, components and / It should be understood that it does not.

It is also to be understood that the singular forms "a" and "an" above, which do not expressly state otherwise in this specification, include plural representations. Thus, in one example, a " component surface " includes one or more component surfaces.

Also, terms including ordinal numbers such as first, second, etc. may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Also, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Furthermore, in the embodiments of the present invention, all terms used herein, including technical or scientific terms, unless otherwise defined, are intended to be inclusive in a manner that is generally understood by those of ordinary skill in the art to which this invention belongs. Have the same meaning. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and, unless explicitly defined in the embodiments of the present invention, are intended to mean ideal or overly formal .

Poly (3,4- Ethylene dioxythiophene ) -Polystyrenesulfonic acid ( PEDOT / PSS ) Dispersion

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a diagram schematically illustrating steps of a method for preparing a dispersion of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) according to an embodiment of the present invention.

A method for producing a dispersion of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) according to an embodiment of the present invention comprises mixing a first mixture Step SlOO; And a second mixing step (S200) of mixing the mixed solvent with poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) in the form of solid powder.

The poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) has an ethylenedioxy group in the form of a ring in the structure of thiophene and has excellent stability to air and heat Lt; / RTI >

Further, it has lower optical bandgap (760 nm to 780 nm or 1.6 eV to 1.7 eV) than thiophene due to the electron donating effect by ethylenedioxy groups substituted at positions 3 and 4, And it is possible to ensure transparency by allowing the absorption band to exist in the infrared region in the oxidation state.

Preferably, the PEDOT / PSS is in the form of a solid powder, and a pallet (trade name: Orgacon Dry) available from AGFA, Belgium can be used

Preferably, the organic solvent is selected from the group consisting of ketone solvents, alcohol solvents, acetate solvents, aromatic solvents, glycol ethers, acrylate monomers, amide solvents, (Urethane acrylate polymer) or a mixed solvent of the organic solvent.

More preferably, the organic solvent is selected from the group consisting of methyl ethyl ketone (MEK), isopropyl alcohol, ethyl alcohol, n-butylacetate, toluene (PGMEA), HEMA (Hydroxyethyl methacrylate), HEA (Hydroxyethy acrylate), and N, N-dimethylformamide (DMF) Or a mixed solvent of the organic solvent.

Preferably, the process for preparing a dispersion of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) according to an embodiment of the present invention comprises, after said second mixing step, (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) dispersion and mixing according to a shear force by a high-shear mixer to produce a second mixture liquid. have

As an example of a high-shear mixer, a high shear force is generated by using a high rotational force or the like, thereby being an apparatus composed of two or more rotors and a stator. Such a high-shear mixer can be made into a second mixed liquid by making the mixed liquid more homogeneous by using a cavitation phenomenon. Preferably, the high shear mixer with respect to the mixed liquid is subjected to dispersion and mixing at a rotation speed of at least about 6,000 rpm for at least 1 hour. At this time, cooling is additionally performed so that the temperature of the mixed liquid is kept at 10 캜.

More preferably, the bead mill may further include, after the high shear mixer step, performing a further dispersion of the second mixed solution in the bead mill. Preferably, the bead mill is in the form of a nano-dispersible bead mill. By the bead milling step, the second mixed solution can be more homogenized by the beads and the dispersibility can be improved.

As an example of the bead mill, pulverization and dispersion are applied by applying an impact force to a target powder using beads, for example, zirconia-containing beads, which are effective in wet dispersion and wet grinding. Thus, by the bead milling step, Can be more homogeneous by the beads and the dispersibility can be improved.

The beads preferably have a particle diameter of 50 to 200 mu m, more preferably beads having a particle diameter of 80 to 120 mu m. The rotating speed of the rotating bead mill is preferably in the range of about 30 to 60 Hz. The dispersion thus prepared should be stored in a refrigerator under 10 ° C. When stored at a temperature of 20 ° C or more for a long period of time at room temperature, the dispersion of PEDOT / PSS shows aggregation phenomenon, and the conductivity may be rapidly lowered.

Preferably, the dispersion aid is a first dispersion aid for assisting dispersion of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) in the solid powder form; And a second dispersion aid for improving the conductivity when the dispersion is coated.

Here, the first dispersion aid may include at least one of amines (Amines), acrylates (acrylates), and polyols (Polyols), and the second dispersion aid may be at least one selected from the group consisting of diethylene glycol, Propylene glycol, tetramethylene glycol, sorbitol, N, N-dimethylformamide, ethylene glycol, N, N-dimethylacetamide ( N, N-dimethylacetamide, acetonitrile, dimethylsulfoxide, glycerol, ethylene cyanide, formic acid, propylene carbonate, ethylene (ethylene glycol) and at least one of carbonate, carbonate, 2,6-difluoropyridine, formamide, and N-methylformamide.

Preferably, the poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) is 0.5 to 2.0 wt%. When the PEDOT / PSS is less than 0.5% by weight, the electrical conductivity is weakened. When the PEDOT / PSS is more than 2.0% by weight, the production cost may be increased.

Preferably, the organic solvent is 80 to 97% by weight. When the organic solvent is less than 80 wt%, the dispersibility is weakened, and when the organic solvent is 97 wt% or more, the electrical conductivity may be weakened.

Preferably, the dispersion aid is 1 to 12% by weight. More preferably, the first dispersion aid is 0.5 to 2.0% by weight, and the second dispersion aid is 1 to 10% by weight. More preferably, the first dispersion aid is 0.8 to 1.0 wt%, and the second dispersion aid is 1 to 5 wt%. By the content of the first dispersion auxiliary agent and the second dispersion auxiliary agent, the electric conductivity can be improved when the dispersion is used as a coating composition while dispersing the PEDOT / PSS solid powder.

Hereinafter, a dispersion of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) according to an embodiment of the present invention will be described.

The dispersion of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) according to an embodiment of the present invention may be prepared by dissolving an organic solvent, a dispersion aid, and poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS).

Preferably, poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) in the form of a solid powder is mixed with a mixed solvent in which the organic solvent and the dispersion aid are mixed.

Preferably, the organic solvent is selected from the group consisting of ketone solvents, alcohol solvents, acetate solvents, aromatic solvents, glycol ether solvents, acrylate monomolecular solvents and amide solvents, acrylate oligomers, (Urethane acrylate polymer) or a mixed solvent of the organic solvent.

Preferably, the organic solvent, the dispersion aid, and poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) can be dispersed and mixed by shear force by a high shear mixer.

More preferably, after dispersion and mixing of the organic solvent, the dispersion auxiliary agent and the poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) by a high shear mixer is performed, Additional dispersion may be performed.

Preferably, the dispersion aid is a first dispersion aid for assisting dispersion of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) in solid powder form; And a second dispersion aid for improving the conductivity when the dispersion is coated.

The first dispersion aid may include at least one of amines (Amines), acrylates (Acrylates), and polyols (Polyols), and the second dispersion aid may be at least one selected from the group consisting of diethylene glycol, Propylene glycol, tetramethylene glycol, sorbitol, N, N-dimethylformamide, ethylene glycol, N, N-dimethylacetamide ( N, N-dimethylacetamide, acetonitrile, dimethylsulfoxide, glycerol, ethylene cyanide, formic acid, propylene carbonate, ethylene (ethylene glycol) carbonate, N-methylformamide, 2,6-difluoropyridine, formamide, and the like.

(PEDOT / PSS) is from 0.5 to 2.0% by weight, the organic solvent is from 80 to 97% by weight, the dispersion aid is from 1 to 12% by weight, to be.

Poly (3,4- Ethylene dioxythiophene ) -Polystyrenesulfonic acid ( PEDOT / PSS ) &Lt; / RTI >

Figure 2 is a schematic illustration of steps of a method of making a coating composition according to one embodiment of the present invention.

The method of preparing the coating composition shown in Fig. 2 can be carried out by mixing an organic solvent, a dispersing aid, and poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) , Or dispersing and mixing by shearing force and then performing additional dispersion on the bead mill to produce a dispersion (S1000);

Preparing a first coating mixture (S2000) for preparing a coating mixture by mixing the dispersion, the additional organic solvent, the curable binder, and the additives; And

And a coating liquid preparation step (S3000) for preparing a coating composition by dispersing and mixing the coating mixture by shearing force by a high-shear mixer.

Here, the organic solvent and the additional organic solvent may be at least one selected from ketone solvents, alcohol solvents, acetate solvents, aromatic solvents, glycol ethers solvents, acrylate monomolecular solvents, amide solvents, acrylate oligomers, (Urethane acrylate polymer) or a mixed solvent of the organic solvent.

More preferably, the organic solvent and the additional organic solvent are selected from the group consisting of methyl ethyl ketone (MEK), isopropyl alcohol, ethyl alcohol, n-butyl acetate (N, N-dimethylacetamide), HEA (Hydroxyethyl methacrylate), HEA (Hydroxyethyl acrylate), and N, N-dimethylformamide dimethylformamide (DMF)) or a mixed solvent of the organic solvent.

The dispersion preparation step (S1000) may be performed according to one embodiment of the method for preparing the poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) dispersion described above.

Preferably, the step of preparing the first coating mixture includes a step (S2010) of preparing a preliminary coating mixture to prepare a preliminary coating mixture by mixing an additional organic solvent, a curable binder, and an additive; And a dispersion liquid mixing step (S2020) of mixing the dispersion liquid with the pre-coating mixture liquid. By thus preparing the abi-coating mixture liquid in advance and then mixing the dispersion, it is possible to secure better dispersion characteristics.

On the other hand, it is preferable that the mass of the dispersion in the dispersion liquid mixing step has a ratio of 10 to 35% with respect to the weight of the pre-coating mixture liquid.

Preferably, the additive may include at least one of a defoaming agent, a leveling agent, a wetting agent, and an initiator (photoinitiator or thermal initiator), and as such an additive, an alkoxysilane-based, polysiloxane-based, polyether siloxane copolymer , Non-silicone based polymers, fluorinated silicones, organic modified polysiloxane based, polycarboxylic acid based, modified polyether based, fatty acid derivatives, surfactants, urethane copolymers, nonionic modified fatty acid derivatives, polyacrylates, polyether siloxane copolymers, dimethyl Polysiloxane, ultraviolet crosslinking silicone polyether acrylate, ultraviolet crosslinking silicone acrylate, ultraviolet crosslinking silicone polyether acrylate, and nonionic organic surfactant.

Preferably, the coating composition prepared by the method of preparing the coating composition comprises 0.1 to 2.0% by weight of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS), 1.05 to 14 % Of an organic solvent, 60 to 95 wt% of an organic solvent, 1 to 40 wt% of a curable binder, and 0.01 to 3 wt% of an additive.

Wherein the organic solvent corresponds to the weight percent of the organic solvent of the final coating composition, including the organic solvent contained in the initial dispersion and the additional organic solvent. As described below by such a composition, the coating composition can have high transparency and electrical conductivity.

More preferably, the dispersion aid is a first dispersion aid for assisting dispersion of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) in solid powder form; And a second dispersion aid for improving the conductivity when the dispersion is coated.

Here, the first dispersion aid may include at least one of amines (Amines), acrylates (acrylates), and polyols (Polyols), and the second dispersion aid may be at least one selected from the group consisting of diethylene glycol, Propylene glycol, tetramethylene glycol, sorbitol, N, N-dimethylformamide, ethylene glycol, N, N-dimethylacetamide ( N, N-dimethylacetamide, acetonitrile, dimethylsulfoxide, glycerol, ethylene cyanide, formic acid, propylene carbonate, ethylene (ethylene glycol) carbonate, N-methylformamide, 2,6-difluoropyridine, formamide, and the like.

More preferably, the first dispersion auxiliary agent may be 0.05 to 4.0% by weight, and the second dispersion auxiliary agent may be 1 to 10% by weight.

Hereinafter, a coating composition comprising poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) according to an embodiment of the present invention will be described.

The coating composition according to an embodiment of the present invention may be prepared by adding an organic solvent, a curing binder, an organic solvent, a dispersing aid, and a poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) And an additive, and performing dispersion and mixing by shear force.

Preferably, the coating composition comprises 0.1 to 2.0 wt% of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS), 1.05 to 14 wt% of a dispersion aid, 60 to 95 wt% 1 to 40% by weight of a curable binder, and 0.01 to 3% by weight of an additive.

Poly (3,4- Ethylene dioxythiophene ) -Polystyrenesulfonic acid ( PEDOT / PSS ) &Lt; / RTI > Example

Hereinafter, experimental results of examples of the coating composition according to one embodiment of the present invention will be described.

Example One

A coating composition was prepared having the following composition.

PEDOT: PSS dispersion: 13.51 wt%

2-butanone: 37.16 wt%

Glycerol: 0.68 wt%

n-Butylacetate: 10.14 wt%

N, N-dimethylformamide: 10.14 wt%

Photoinitiator Irgacure 184 (trade name) 1.01 wt%

Polyacrylate leveling improver: 0.34 wt%

Photo-crosslinkable aliphatic acrylate polymer, photo-crosslinkable acrylate oligomer, photo-curable acrylate monomer mixture: 27.03 wt%

Method for producing coating composition

A mixture of 8 g of a photo-crosslinkable aliphatic acrylate polymer, a photo-crosslinkable acrylate oligomer and a photo-curable acrylate monomer mixture was mixed with 17.3 g of a mixture of 2-butanone, glycerol, n-butylacetate, N, N-dimethylformamide and polyether siloxane copolymer, 1 hour.

(PEDOT: PSS complex (solid), Ethanol, Dispersion Adjuster 1, and 4 g of PEDOT: PSS dispersion mixture consisting of Dispersion Adjuvant 2) Magnetic stirring 30 minutes

(2) was stirred with a high shear mixer. Run for 30 minutes

Manufacture of Coating Sample with Polycarbonate as a Substrate

The coating composition was spray-coated onto a polycarbonate substrate (1.0 mm thick, 200 mm x 200 mm size, without surface pretreatment)

-Convection oven Dry at 80 ° C for 2 minutes

And passed through a UV lamp at -400 mJ at a rate of 4 M / min to perform photocuring

Example 2

Except for using the ultraviolet curing type silicone polyether acrylate in place of the polyacrylate leveling improver in Example 1, the remainder was manufactured in the same manner. The spray coating on the surface of the polycarbonate proceeds in the same way.

Example 3

In the same manner as in Example 1 except that the polyacrylate leveling improver was replaced with a 1: 1 mixture of ultraviolet curable silicone polyether acrylate and a polyacrylate leveling improver, the same procedure was followed as in the case of the other preparation and spray coating.

Example 4

A coating composition was prepared having the following composition.

PEDOT: PSS dispersion: 10.37 wt%

2-butanone: 24.9 wt%

Toluene: 20.75 wt%

Glycerol: 0.83 wt%

n-Butylacetate: 12.45 wt%

N, N-dimethylformamide: 12.45 wt%

Photo-initiator Irgacure 184 (trade name): 1.24 wt%

A 1: 1: 1 mixture of a polyacrylate leveling improver, ultraviolet crosslinking type silicone polyether acrylate, and ultraviolet curable silicone acrylate: 0.3 wt%

Photo-crosslinkable aliphatic acrylate polymer, photo-crosslinkable acrylate oligomer, photo-curable acrylate monomer mixture: 16.6 wt%

Method for producing coating composition

2-butanone, glycerol, n-butylacetate, N, N-dimethylformamide, Toluene and polyacrylate leveling improvers, ultraviolet cross-linkable silicone polyether 17.3 g of a 1: 1: 1 mixture of acrylate and ultraviolet curable silicone acrylate was mixed and subjected to magnetic stirring for 1 hour.

(PEDOT: PSS complex (solids), Ethanol, Dispersion Adjuster 1, and Dispersion Adjuvant 2) was mixed with 2.5 g of the dispersion mixture of PEDOT: PSS. Magnetic stirring 30 minutes

(2) was stirred with a high shear mixer. Run for 30 minutes

Manufacture of Coating Sample with Polycarbonate as a Substrate

Convection oven Dry at 80 ° C for 2 minutes

Passed through a 400 mJ UV lamp at a speed of 4 M / min to perform photocuring

Example 5

A coating composition was prepared having the following composition.

PEDOT: PSS dispersion: 10.71 wt%

2-butanone: 25.97 wt%

Toluene: 21.65 wt%

Glycerol: 0.87 wt%

n-Butylacetate: 12.99 wt%

N, N-dimethylformamide: 12.99 wt%

Photo-initiator Irgacure 184 (trade name): 1.3 wt%

A 1: 1: 1 mixture of a polyacrylate leveling improver, ultraviolet cross-linkable silicone polyether acrylate, and ultraviolet curable silicone acrylate: 0.43 wt%

Photo-crosslinkable aliphatic acrylate polymer, photo-crosslinkable acrylate oligomer, photo-curable acrylate monomer mixture: 12.99 wt%

Method for producing coating composition

The photo-crosslinkable aliphatic acrylate polymer, photo-crosslinkable acrylate oligomer and photo-curable acrylate monomer mixture 3.0 g and 2-butanone, glycerol, n-butylacetate, N, N-dimethylformamide, toluene and polyacrylate leveling improver, A mixture of 17.3 g of a 1: 1: 1 mixture of ether acrylate and ultraviolet curable silicone acrylate was mixed and subjected to magnetic stirring for 1 hour.

PEDOT: PSS complex (solid), Toluene, acrylate monomer, dispersion aid 1, and dispersion aid 2 were mixed with 2.5 g of the PEDOT: PSS dispersion mixture. Magnetic stirring 30 minutes

(2) was stirred with a high shear mixer. Run for 30 minutes

Manufacture of Coating Sample with Polycarbonate as a Substrate

Convection oven Dry at 80 ° C for 2 minutes

Passed through a 400 mJ UV lamp at a speed of 4 M / min to perform photocuring

Example 6

A coating composition was prepared having the following composition.

PEDOT: PSS dispersion: 16.34 wt%

2-butanone: 19.61 wt%

Toluene: 16.34 wt%

Glycerol: 0.65 wt%

n-Butylacetate: 9.8 wt%

N, N-dimethylformamide: 9.8 wt%

Photo-initiator Irgacure 184 (trade name): 0.98 wt%

1: 1: 1 mixture of polyacrylate leveling improver, ultraviolet crosslinking type silicone polyether acrylate, and ultraviolet curable silicone acrylate: 0.33 wt%

Photo-crosslinkable aliphatic acrylate polymer, photo-crosslinkable acrylate oligomer, photo-curable acrylate monomer mixture: 26.14 wt%

Method for producing coating composition

(PEDOT: PSS complex (solids), Ethanol, Dispersion Adjuster 1, and 5 g of PEDOT: PSS dispersion mixture consisting of Dispersion Adjuvant 2) Magnetic stirring 30 minutes

(2) was stirred with a high shear mixer. Run for 30 minutes

Manufacture of Coating Sample with Polycarbonate as a Substrate

Convection oven Dry at 80 ° C for 2 minutes

Passed through a 400 mJ UV lamp at a speed of 4 M / min to perform photocuring

Example 7

A coating composition was prepared having the following composition.

PEDOT: PSS dispersion: 19.14 wt%

2-butanone: 19.93 wt%

Toluene: 16.61 wt%

Glycerol: 0.66 wt%

n-Butylacetate: 9.97 wt%

N, N-dimethylformamide: 9.97 wt%

Photo-initiator Irgacure 184 (trade name): 0.98 wt%

Photo-crosslinkable aliphatic acrylate polymer, photo-crosslinkable acrylate oligomer, photo-curable acrylate monomer mixture: 21.59 wt%

Method for producing coating composition

A photo-crosslinkable aliphatic acrylate polymer, a photo-crosslinkable acrylate oligomer, a photo-curable acrylate monomer mixture, and a 2-butanone, glycerol, n-butylacetate, N, N-dimethylformamide, a toluene and polyacrylate leveling improver, A mixture of 17.3 g of a 1: 1: 1 mixture of ether acrylate and ultraviolet curable silicone acrylate was mixed and subjected to magnetic stirring for 1 hour.

PEDOT: PSS complex (solids), Toluene, Acrylate monomer, Dispersion aid 1, and 6g of PEDOT: PSS dispersion mixture 2, Magnetic stirring 30 minutes

(2) was stirred with a high shear mixer. Run for 30 minutes

Manufacture of Coating Sample with Polycarbonate as a Substrate

Convection oven Dry at 80 ° C for 2 minutes

Passed through a 400 mJ UV lamp at a speed of 4 M / min to perform photocuring

Example 8

A coating composition was prepared having the following composition.

PEDOT: PSS dispersion: 14.47 wt%

2-Propanol: 68.32 wt%

Glycerol: 0.31 wt%

N, N-dimethylformamide: 11.49 wt%

Photoinitiator Irgacure 184 (trade name): 0.93 wt%

Polyether siloxane copolymer: 0.31 wt%

Photo-crosslinkable aliphatic acrylate polymer: 2.89 wt%

Method for producing coating composition

A mixture of 1 g of photo-crosslinkable aliphatic acrylate polymer and 25.9 g of a mixture of 2-propanol, glycerol, N, N-dimethylformamide and polyether siloxane copolymer was mixed and subjected to magnetic stirring for 1 hour.

PEDOT: PSS complex (solid), 2-Butanone, Acrylate monomer, Dispersion Adjuster 1, and 5 g of PEDOT: PSS dispersion mixture consisting of Dispersion Adjuvant 2 was added to the mixture of Compound (1) Magnetic stirring 30 minutes

(2) was stirred with a high shear mixer. Run for 30 minutes

Manufacture of Coating Sample with Polycarbonate as a Substrate

Convection oven Dry at 80 ° C for 2 minutes

Passed through a 400 mJ UV lamp at a speed of 4 M / min to perform photocuring

Example 9

A coating composition was prepared having the following composition.

PEDOT: PSS dispersion: 15.53 wt%

2-Propanol: 68.32 wt%

Glycerol: 0.31 wt%

N, N-dimethylformamide: 11.49 wt%

Photoinitiator Irgacure 184 (trade name): 0.93 wt%

Polyether siloxane copolymer: 0.31 wt%

Photo-crosslinkable aliphatic acrylate polymer: 3.11 wt%

Method for producing coating composition

(2) was stirred with a high shear mixer. Run for 30 minutes

Manufacture of Coating Sample with Polycarbonate as a Substrate

Convection oven Dry at 80 ° C for 2 minutes

Passed through a 400 mJ UV lamp at a speed of 4 M / min to perform photocuring

Coating film Thickness, Haze, Light transmittance And surface resistance test results

Measurement of coating film thickness: Mitutoyo H0503 micrometer

Haze measurement: Minolta 3600D

Haze Specification: ASTM D1003-97

Light transmittance measurement: Minolta 3600D

Surface resistance measurement: SIMCO ST-4

Coating thickness Haze Light transmittance (including substrate, @ 550nm) Surface resistance Example 1 9.0 to 12.5 탆 0.65% 88.53% 10e10.2 ohms / square Example 2 11.5 to 12.5 탆 7.95% 88.00% 10e10.2 ohms / square Example 3 8.0 탆 6.54% 88.92% 10e10.5 ohms / square Example 4 2.5 to 3.5 μm 0.50% 88.23% 10e7.0 ohm / square Example 5 7.5 to 8.5 탆 0.84% 86.98% 10e7.0 ohm / square Example 6 4.5 to 6.5 μm 2.82% 88.79% 10e5.5 ohms / square Example 7 3.5 to 6.5 μm 26.06% 81.21% 10e7.5 ohms / square Example 8 1.0 to 2.0 탆 4.62% 85.41% 10e3.9 ohm / square Example 9 <0.5 μm 1.76% 89.52% 10e5.1 ohms / square

Surface resistance change immediately after coating and over time

Immediately after coating Elapsed time After time Example 1 10e10.2 ohms / square 4992 hours 10e7.2 ohms / square Example 2 10e10.2 ohms / square 4992 hours 10e7.2 ohms / square Example 3 10e10.5 ohms / square 4992 hours 10e7.7 ohms / square Example 4 10e7.0 ohm / square 4992 hours 10e7.2 ohms / square Example 5 10e7.0 ohm / square 4728 hours 10e6.7 ohms / square Example 6 10e5.5 ohms / square 4728 hours 10e6.6 ohms / square Example 7 10e7.5 ohms / square 4728 hours 10e6.6 ohms / square Example 8 10e3.9 ohm / square 4728 hours 10e4.2 ohms / square Example 9 10e5.1 ohms / square 4728 hours 10e5.5 ohms / square

As shown in the above table, the effect of lowering the surface resistance due to the phenomenon of stabilization of the coating film after a lapse of about 200 days or more after coating can be confirmed.

On the other hand, it can be confirmed that the surface resistance is somewhat increased as in Examples 4, 6, 8 and 9, but it is confirmed that a sufficient value is maintained to realize antistatic performance.

Example 10

The coating solution of Example 8 was stored at room temperature for 20 days and then coated on the same substrate in the same manner.

Surface resistance Haze Transmittance @ 550 nm Coating Result Immediately after Preparation of Coating Solution (Example 8) 10e3.9 ohm / square 4.62% 85.41% Immediately after coating of the coating solution 20 days after the preparation (Example 10) 10e5.6 ohms / square 1.3% - 51 days after coating of the coating solution 20 days after the preparation (Example 10) 10e6.3 ohms / square 1.38% 88.56%

As shown in the above table, the surface resistance slightly increased over time after coating solution production and after coating, but the characteristics such as transmittance and haze were improved and the surface resistance was sufficient to exhibit antistatic performance .

On the other hand, the following table is a comparison table of antistatic performance according to the surface resistance value.

Surface resistance (Ω /) Charge phenomenon Applications > 10 ¹³ Static generation due to charge accumulation Isolation 10 ¹² ~ 10 ¹³ Decrease after World War II Prevention of electrification in a static state 10 ¹⁰ to 10 ¹² Disappear immediately after the war Antistatic in the dynamic state, applied to film and fiber manufacturing process 10 ⁶ to 10 ¹⁰ Almost no charge accumulation Conductivity grant, Electronic device protection, IC tray 10 ³ ~ 10 ⁶ No accumulation of charge Electromagnetic wave shielding, flooring for clean room

House paints

3 is a schematic view illustrating a three-dimensional view of a dust collecting container according to an embodiment of the present invention. 4 is a cross-sectional view of a dust collector according to an embodiment of the present invention.

Generally, the term "static electricity" refers to a phenomenon occurring in triboelectricity and the like, which refers to electric charge in which the distribution of electric charge does not change with time and electric charge by the electric charge. When static electricity is generated by electrification between certain objects, the objects stick to each other due to the electrostatic attraction force.

On the other hand, when dust is stored in the dust collecting container used for a vacuum cleaner or the like, static electricity is generated between the dust collecting container main body and the dust, so that the dust sticks to the dust collecting body and does not fall off easily.

In this case, even if the dust box is blown off by the user, the dust sticking to the dust collecting body 210 may not be removed well.

In addition, in the process of opening the cover member of the dust collecting box to empty the dust, the inside dust is scattered to the outside by the electrostatic repulsive force, thereby causing the user to drink dust, which may cause an unsanitary environment to be created .

In order to solve such a problem, a dust collecting container 100 used in a vacuum cleaner according to an embodiment of the present invention includes a casing part 110 and a coating layer 120 provided on an inner wall of the casing part, The coating layer 120 comprises 0.1 to 2.0 wt% of poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS), 1.05 to 14 wt% of a dispersion aid, 60 to 95 wt% of an organic solvent, By weight to 40% by weight, and 0.01 to 3% by weight of an additive.

The coating layer 120 is a coating layer containing a conductive polymer that imparts excellent conductivity, and the conductive polymer includes PEDOT / PSS. Such a conductive polymer has an effect of lowering the surface resistance of the dust collecting container 100.

Generally, the casing 110 of the dust collecting container 100 may be made of a synthetic resin such as a polycarbonate resin. The polycarbonate resin has a high surface resistance of about 10 ¹¹ to 10 ¹⁵ ohm / sqr. If the surface resistance is high, there is a high possibility that static electricity is generated between the dust collecting container 100 and the dust.

However, when the conductive polymer is provided on the surface of the dust collecting container 100, the surface resistance is lowered and the electric conductivity is increased. When the electrical conductivity increases, the charges charged in the dust collecting container 100 can be moved to the cleaner main body side or discharged in the air.

Therefore, static electricity is prevented from being generated in the dust collecting container 100, and dust can be prevented from being adsorbed on the surface of the dust collecting container 100.

FIG. 5 is a schematic view showing a three-dimensional view of a dust collecting container according to an embodiment of the present invention. FIG. 6 is a view schematically showing a sectional view of a dust collecting container according to an embodiment of the present invention. The description of the dust collecting container shown in FIGS. 3 and 4 is applicable to the dust collecting container shown in FIGS. 5 and 6, and a description thereof will be omitted. In FIGS. 5 and 6, There is shown an embodiment in which the casing part 310 and the coating layer 320 are provided in the painkiller 300.

The dispersion according to one embodiment of the present invention can be applied to various coating compositions and can exhibit an effect that can be utilized in a photocurable coating composition having excellent surface hardness, weather resistance, chemical resistance, and water resistance.

The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features presented herein.

Claims

An organic solvent, and a dispersion aid to prepare a mixed solvent; And
And a second mixing step of mixing poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) in the form of a solid powder into the mixed solvent,
After the second mixing step, a mixed solution of the mixed solvent and poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) is dispersed and mixed by a shear force by a shear mixer, Further comprising the steps of:
Further comprising: a bead mill step of performing an additional dispersion of the second mixed solution in the bead mill after the shear mixer step,
Wherein the shear mixer stage is a shear mixer including at least two rotors and a stator to induce cavitation in the mixed liquid to homogenize the mixed liquid,
Wherein the bead milling step comprises pulverizing and dispersing powder contained in the mixed liquid by beads,
The beads have an arbitrary particle size of 50 mu m to 200 mu m,
Wherein the organic solvent comprises ethyl alcohol,
Wherein the dispersion aid comprises an amine dispersion aid and an ethylene carbonate dispersion aid,
The poly (3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) is 0.5 to 1.5% by weight of the total weight of the mixed solution,
The organic solvent is 93.5 to 94.5% by weight of the total mass of the mixed solution,
The amine dispersion auxiliary agent is 0.5 to 1.5 wt% of the total mass of the mixed solution,
The ethylene carbonate dispersion auxiliary agent is 3.5 to 4.5 wt% of the total mass of the mixed liquid,
(3,4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT / PSS) dispersion, wherein the rotating speed of the rotating body in the bead milling step is in the range of 30 to 60 Hz.

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