KR20090053592A - Membrane using composition of conductive polymers - Google Patents

Abstract

The present invention relates to a polymer membrane using a conductive polymer solution composition, and more particularly, to a polythiophene conductive polymer solution, an alcoholic organic solvent, an amide organic solvent or an aprotic high polar solvent, a metal compound, a melamine resin, and A polythiophene-based conductive polymer solution composition in which a binder selected from polyester, polyurethane resin and alkoxy silane is mixed at a specific component ratio. It has strong moisture resistance and durability as well as shows low contact resistance of about 500 ~ 2K 하면서, and is applied to upper and lower electrode films for contact panel, inorganic electroluminescent device (EL) electrode film and transparent electrode film for display. A polymer membrane using a possible polythiophene-based conductive polymer solution composition.

Polythiophene conductive polymer solution composition, polymer membrane, polythiophene conductive polymer solution, alcohol organic solvent, amide organic solvent, aprotic high polar solvent, metal compound, melamine resin, binder

Description

Membrane using composition of conductive polymers

The present invention relates to a polymer membrane using a conductive polymer solution composition.

As a conductive polymer compound, polyaniline (PAN), polypyrrol (PPy), and polythiophene (PT) may be used as the conductive polymer compound. These are widely studied materials because they are easy to polymerize and have very good conductivity, thermal stability and oxidative stability.

By applying the electrical properties of these conductive polymer compounds, the possibility of use in various applications, such as the electrode of the secondary battery, electromagnetic shielding material, flexible electrode, antistatic material, anti-corrosion coating material has been proposed, but difficult processing, thermal and atmospheric Due to problems of stability, moisture resistance, and price, it is not actively commercialized.

However, recently, with the attention of dust adhesion preventing and antistatic coating materials, the standards for electromagnetic wave shielding have begun to attract attention as a coating material for electromagnetic wave shielding of various electronic devices.

In particular, the conductive polymer has been attracting attention as a conductive coating on the glass surface of the CRT, as described in US Pat. Nos. 5,035,926 and 5,391,472, polyethylene dioxythiophene, PEDT It's from the start of attention. Such conductive polymers have properties of excellent transparency compared to other conductive polymers such as polyaniline, polypyrrole and polythiophene.

Conventional polyethylene dioxythiophene prepared a coating solution capable of water dispersion by using a high molecular acid salt such as polystyrene sulfonate as a doping material in order to improve conductivity, and is excellent in mixing and processing with alcohol solvent, and glass tube (CRT) glass And coating films for various applications such as plastic film surfaces.

A typical example of such water-dispersible polyethylenedioxythiophene is Baytron P Co., Ltd., currently on sale. However, the polyethylenedioxythiophene conductive polymer should be coated with a low concentration of polyethylenedioxythiophene in order to maintain a high transparency of 95% or more even though excellent transparency, it is difficult to achieve a conductivity range of 1 ㏀ / ㎡ or less in a general method. Furthermore, silica sol prepared from alkoxysilanes [RSi (OR ₁ ) ₃ ] added to increase the adhesion of the membrane, wherein R is methyl, ethyl, propyl or isobutyl, and R ₁ is methyl or ethyl When added, the conductivity is further lowered due to the non-conductive silica sol, so that it is even more impossible to produce a conductive film of 1 mW / m 2 or less, and the existing technology is used only as an antistatic coating material requiring low conductivity. In addition, Baytron P of Bayer Co., Ltd. is a water dispersion and has a SO ₃ ^- group inside, which is very vulnerable to moisture even after polymer film formation. Due to severe change in characteristics, commercialization was impossible.

Referring to the related art, a conductive polymer composition containing a polyethylene dioxythiophene, an alcohol solvent, an amide solvent, a polyester resin binder, and the like, and a solvent of polyethylene dioxythiophene and an alcohol A conductive light diffusing film coating liquid composition (Korean Patent No. 2005-66209) containing an amide solvent, a silane coupling agent, and the like are known.

Such a known technology may have high transparency, strong adhesion and durability while having electrical properties of 1 ㏀ / ㎡ or less, but these also change the electrical properties of the conductive polymer film over time, and the electrical properties under high temperature and high humidity. It is severely impossible to commercialize. Due to these shortcomings, it has high transparency of more than 95% of transmittance and realizes strong moisture resistance, adhesive strength and durability while achieving surface resistance of 1 ㏀ / ㎡ or less that satisfies the commercially available electromagnetic wave prevention standard (TCO standard) as an electromagnetic shielding material. The technology to do was almost impossible with the existing technology. In addition, in the case of the conductive polymer composition containing polyethylene dioxythiophene, nano-particle sized transparent organic and inorganic compounds, alcohol solvents, amides, sulfoxides, and the like, low surface resistance is obtained. (200 ~ 700 Ω / ㎡), excellent transparency (90%), high durability of the conductive film can be produced, but the electrical properties of the conductive polymer membrane changes with time, and the transparent organic and inorganic compounds are excessive (0.5 powder basis) ~ 10% by weight) to show a high contact resistance (5 KΩ or more). In particular, in the case of a commercially available contact panel transparent electrode film, the controller's recognition range of the contact resistance generated when the upper plate (ITO Film) and the lower plate (ITO Glass or ITO Film) are contacted by pressure from the outside is Since it is fixed at 500 ~ 2 KΩ, the conductive film using the above known technique has a high contact resistance (5 KΩ or more), which is fundamentally used, such as personal digital assistants (PDAs) and car navigation systems. Applications to inorganic electroluminescent device (EL) electrodes used in touch panels or mobile phones, and transparent electrode films used for display electrodes are impossible.

Accordingly, the present inventors have tried to prepare a polythiophene-based conductive polymer membrane capable of high physical properties and high physical properties such as high transparency, strong moisture resistance, durability and low contact resistance, and thus, polythiophene-based conductive polymer aqueous solution and alcohol-based A polymer solution composition containing an organic solvent, an amide organic solvent or an aprotic high polar solvent, a metal compound, a melamine resin, and a specific binder selected from polyester, polyurethane resin, and alkoxy silane in a certain component ratio. A solvent or an aprotic high polar solvent partially dissolves the polymer group of the polythiophene conductive polymer aqueous solution to improve the connectivity and dispersibility between the polythiophene conductive polymers, and the melamine resin has an NH ⁺ group so that the polyti SO ₃ ^- Roof Tile in Offenic Conductive Polymer Aqueous Solution (Baytron P) In combination, it prevents SO ₃ ^-- groups from reacting with water, thereby improving moisture resistance and providing electrical stability over time. (10 ² ~ 10 ⁸ S / cm) to induce low contact resistance, improve the adhesion of the specific binder to the transparent substrate and durability of the conductive film, and improve the conductivity and transparency at the same time, without the use of conventional stabilizers The present invention was completed by knowing that it is possible to secure physical properties such as moisture resistance, adhesion, durability, film uniformity, liquid stability, and low contact resistance.

Accordingly, the present invention provides a polymer using a polythiophene-based conductive polymer solution composition capable of simultaneously improving conductivity and transparency and securing physical properties such as strong moisture resistance, adhesion, durability, film uniformity, liquid stability, and low contact resistance. The purpose is to provide the act.

The present invention consists of a polythiophene-based conductive polymer solution composition containing a metal compound capable of ionization, and has a conductivity of 1 ㏀ / m 2 or less, a transmittance of 95% or more, and a polythiophene having a low contact resistance of 500 to 2 ㏀. It is characterized by a system conductive polymer membrane.

The polymer membrane using the polythiophene-based conductive polymer solution composition according to the present invention is a contact panel requiring a conductivity of 1 ㏀ / ㎡ or less, transmittance of 95% or more, strong moisture resistance, durability and low contact resistance of about 500 ~ 2 ㏀ It can be applied as upper / lower electrode film for touch panel, inorganic electroluminescent device (EL) electrode film for mobile phone, transparent electrode film for display, electromagnetic wave shielding layer of TV CRT tube and computer monitor screen, and other glass, poly It is also easy to use for carbonate acrylic plate, polyethylene terephthalate or cast polypropylene (CPP) film.

Hereinafter, the present invention will be described in detail.

The present invention relates to a polythiophene conductive polymer solution, an alcoholic organic solvent, an amide organic solvent or an aprotic high polar solvent, an ionizable metal compound, a melamine resin, and a polyester, a polyurethane resin, and an alkoxy silane. The present invention relates to a polymer membrane using a polythiophene-based conductive polymer composition containing a binder.

Specifically, in addition to the conventional polythiophene-based conductive polymer aqueous solution and alcohol-based organic solvent, partially dissolve the polymer group of the polythiophene-based conductive polymer aqueous solution to improve the connection and dispersibility between the polythiophene-based conductive polymers. Low electrical conductivity (less than 10 ² S / cm) of polythiophene-based aqueous solution due to its high locality (10 ² to 10 ⁸ S / cm) upon contact with a specific amide organic solvent or aprotic high polar solvent. Metal compounds that lower the high contact resistance resulting from the; NH ⁺ SO ₃ group in the melamine resin in the polythiophene-based conductive polymer solution (Baytron P) ^- binding group and SO ₃ ^- group is a melamine resin which reacts with water to prevent improve electrical stability in a strong moisture and time; By selecting and using a specific binder selected from polyesters, polyurethane resins, and alkoxy silanes, which are characterized by improving adhesion to a transparent substrate and durability of the conductive film, the conductive film acts to retain the strong durability, thereby providing It is possible to secure physical properties such as simultaneous improvement of conductivity and transparency, strong moisture resistance, adhesiveness, durability, membrane uniformity, liquid stability and low contact resistance without using a sulfonic acid stabilizer for connection between thiophene-based conductive polymers. Polythiophene-based conductive compositions.

When coated on a transparent substrate such as glass or a synthetic resin film using the polythiophene-based conductive polymer solution composition, the conductivity in the range of 100 to 1K Ω / ㎡, preferably 95 to 100%, preferably 95 to 95 A film / layer having a transparency of 99%, 2 KPa or less, preferably 800-1500 KPa, and excellent moisture resistance, adhesion, durability, film uniformity and liquid stability can be obtained. The conductivity below 1 mW / m 2 is an extremely high value that satisfies the Tianstemanners Central Organization (TCO) standard set by the most stringent Swedish Workers' Association for electromagnetic shielding.

Looking at the components constituting the polythiophene-based conductive polymer composition according to the invention in more detail as follows.

First, the polythiophene-based conductive polymer solution is generally used in the art, but is not particularly limited, but in the present invention, it is preferable to use polyethylenedioxythiophene (PEDT), and specifically Bayer Corporation Use a Baytron P product. The PEDT is doped with polystyrenesulfonate (PSS) as a stabilizer (dopant) to exhibit good water solubility, and has excellent thermal and atmospheric stability. In addition, the PEDT is adjusted in the range of 1.0 to 1.5% by weight of the PEDT and PSS solid content concentration in order to maintain the optimum dispersibility in water. The PEDT can be easily coated by diluting with such a solvent because it is well mixed with water, alcohol, or a solvent having a high dielectric constant, and exhibits excellent transparency compared with other conductive polymers such as polyaniline and polypyrrole even when a coating film is formed.

The polythiophene-based conductive polymer aqueous solution is used in the range of 20 to 70% by weight, preferably 26 to 67% by weight. If the amount is less than 20% by weight, an amide organic solvent or an aprotic high polarity is used. Dipolar, AHD) It is difficult to realize the high conductivity of 1 ㏀ / ㎡ even when using a lot of solvents, and when added in excess of 70% by weight, the transmittance according to the increase of the high molecular weight of the conductive color, especially visible light long wavelength band (550 Nm or more), which decreases to 95% or less, which is not preferable.

Next, an alcohol-based organic solvent is used. The alcohol-based organic solvent may be a C 1-4 alcohol, and specifically methanol, ethanol, propanol, isopropanol and butanol may be used alone or in combination. Preferably, methanol is used as a main solvent in order to improve the dispersibility of the PEDT conductive polymer.

Such alcohol is 10 to 75% by weight, preferably 10 to 71% by weight when used in combination with an amide organic solvent, more preferably 24 to 70% by weight, and used in combination with an aprotic high polar solvent 5 to 68% by weight, more preferably 20 to 62% by weight. If the amount is less than 10% by weight, the coating film is dispersible, so that high conductivity can be obtained, but permeability is impaired. When the amount is more than 75% by weight, the dispersibility is good, but there is a problem of reducing conductivity and easily causing aggregation. Since it is not appropriate, it is preferable to use it in consideration of the relative amount.

Next, an amide organic solvent or an aprotic high polar solvent is used. Specific examples of the amide organic solvent include formamide (FA), N-methylformamide (NMFA), and N, N-dimethylformamide (DMF). ), Acetamide (AA), N-methylacetamide (NMAA), N-dimethylacetamide (DMA) and N-methylpyrrolidone (NMP) are preferably used. Such amide-based organic solvents have a common feature of having an intramolecular amide group [R (CO) NR ₂ ], wherein R represents H, CH ₃ , or -CH ₂ CH ₂ CH _2- . The addition of an amide solvent alone to the PEDT conductive polymer can be used to increase the conductivity. However, in order to achieve a surface resistance of 1 ㎡ / ㎡ or more and a transparency of 95% or more, two or more amide solvents are preferably used. Mixed use is good.

In addition, as the aprotic high polar solvent (AHD) of the present invention, specifically, dimethyl sulfoxide (DMSO) and / or propylene carbonate may be used. The aprotic high polar solvent (AHD) and the amide solvent must be used, respectively, and the use of the aprotic high polar solvent (AHD) is not preferable because it does not have a conductivity synergistic effect but also high transparency and long-term liquid stability.

When the aprotic high polar solvent (AHD) is used alone, the conductivity synergistic effect is not large, and in order to generate the conductivity improving effect, at least one dispersion selected from ethylene glycol (Ethylenglycol, EG), glycerin and sorbitol (Sorbitole) It is preferable to mix and use a stabilizer. When the dispersion stabilizer is used in combination, it is preferable to use 1 to 10% by weight, preferably 4 to 10% by weight, based on the polythiophene-based conductive polymer solution composition. It is not possible to obtain, and in the case of exceeding 10% by weight, it is preferable to maintain the above range because a rise in conductivity can be obtained but a high boiling point causes a problem of high temperature firing.

The amide organic solvent is in the range of 1 to 10% by weight, preferably 3 to 7% by weight, and the aprotic high polar solvent is 1 to 10% by weight, preferably 4 to 8% by weight. If lower than the lower limit, the synergy effect of the conductivity is weak, and if the upper limit is exceeded, the conductivity may be increased, but high temperature firing should be performed as the amount of the amide-based solvent having a high boiling point increases. In addition to the conductivity disturbance caused by using a plastic substrate other than glass, there is a disadvantage that the deformation of the substrate itself due to high temperature plasticity.

The ionizable metal compound that induces a decrease in the contact resistance may be specifically used in a powder state, and the SO ₃ ^- group and the ionized metal ion may be connected to improve conductivity, not a method of codispersing a metal inorganic material. Considering that the existing PEDT conductive polymer solution (Baytron P) is an aqueous solution, using an alcohol solvent to improve the dispersibility of the PEDT conductive polymer solution (Baytron P), the appearance after forming the polymer film, and the percolation property In this case, it is advantageous to use a metal compound which is well ionized in a solvent of water or alcohols for the light transmittance and the appearance of the polymer membrane. Typically used in the art, but is not particularly limited in the present invention Al (OC ₂ H ₅ ) ₃ , AgNO ₃ , Ti (OCH ₃ ) ₄ , SnCl ₂ , CH ₃ COOAg, Ag ₂ CO ₃ , AgO, Cu ( CH ₃ COO) ₂ metal compound was used, Mg (OH) ₂ , SnCl ₄ , TiO, Li ₂ C ₂ O ₄ , CH ₃ LiO, Ca (OH) ₂ , Cu (OH) ₂ , Cu (SO) ₄ , Na ₂ S ₂ O ₈ and the like can also be used. In addition, the metal compound is used in 0.005 ~ 5% by weight, preferably 0.01 ~ 0.5% by weight, if the amount is less than 0.005% by weight of the contact resistance is more than 5 K 발생 occurs when the metal exceeds 5% by weight Although the electrical conductivity of each particle of the compound is excellent, but the number of non-ionized metal particles increases, the excess of the polythiophene-based polymer particles increases the surface resistance (represents surface resistance of 10 ³ to 10 ⁴ Ω / ㎡). It is preferable to maintain the above range because problems such as an increase in contact resistance (5 KPa or more) and a decrease in light transmittance occur.

PEDT conductive polymer solution of the present invention is a binder for imparting moisture resistance, substrate adhesion and durability, using an aqueous solution or an alcohol-soluble polymer resin, since the PEDT conductive polymer solution itself is an aqueous dispersion, It is preferable. However, since the PEDT conductive polymer solution itself is an aqueous dispersion and has SO ₃ ⁻ groups in the solution, moisture resistance is weakened by using a binder in an aqueous solution to easily react with water and improve adhesion. In the present invention, the melamine resin is mixed and used as an essential component for imparting strong moisture resistance. These melamine resins NH ⁺ group is a polythiophene-based conductive polymer solution SO ₃ in the (Baytron P) in the melamine ^{resin-combined} groups SO ₃ ^- group is electrical stability effects of the addition of moisture resistance strong to prevent reaction with water as time also You can get it.

The melamine resin is used in 1 to 10% by weight, preferably 1 to 8% by weight. If the amount of the melamine resin is less than 1% by weight, the moisture resistance of the conductive film is poor and when the moisture content exceeds 10% by weight, the moisture resistance is very excellent. It is preferable to maintain the above range because a problem of inhibiting an increase in conductivity occurs.

A binder that induces adhesion to the transparent substrate and improves durability is specifically selected from at least one selected from polyester, polyurethane, and alkoxy silane, in which two or more binders are mixed for a stronger adhesive effect. It is more preferable to use. In particular, when coating on the polyethylene terephthalate film, it is more preferable to use a polyester resin to improve adhesion to the substrate. The binder is used in an amount of 0.1 to 5% by weight, preferably 0.5 to 4% by weight. When the amount of the binder is less than 0.1% by weight, the adhesion to the substrate and the durability of the conductive film are poor, and when the content exceeds 5% by weight, the conductivity is increased. It is preferable to maintain the above range because a problem that inhibits the occurrence of the ammonia occurs. Polyesters and polyurethanes used as binders can be used as long as they are commonly used in the art, and the alkoxy silanes are preferably tri- and tetra-functional silane compounds, more preferably trimethoxysilane and tetraethoxysilane. Suitable.

In addition, in order to prevent blocking of the coated surface and increase slipperiness, an additive for slip and viscosity reduction may be additionally added in an amount of 0.05 to 5 parts by weight based on 100 parts by weight of the conductive polymer solution composition.

Meanwhile, the method for preparing a polythiophene conductive polymer solution composition having high conductivity, transparency, strong moisture resistance, durability, and low contact resistance according to the present invention is not particularly limited to those commonly used in the art. Using a metal compound capable of ionizing with an organic solvent; Second, it can be largely divided into a method using an aprotic highly dipolar (AHD) solvent and an ionizable metal compound.

The solution composition prepared as described above is applied to a transparent substrate surface such as a CRT glass surface, a cast polypropylene (CPP) film, a polyethylene terephthalate film, a polycarbonate and an acrylic panel. Drying in an oven at about 100 to 145 ° C. for about 1 to 10 minutes produces a highly transparent and highly conductive polythiophene polymer film for electromagnetic shielding and electrodes. In this case, the coating may be a bar coating, a roll coating, a flow coating, a dip coating or a spin coating method, and the thickness of the dried coating film is 5 μm or less.

The polymer film prepared above is a touch panel requiring high conductivity, transparency, moisture resistance, durability, and low contact resistance, as well as antistatic and electromagnetic shielding functions satisfying the Tianstemanners Central Organization (TCO) standard. It can be applied to upper and lower electrode films for), inorganic electroluminescent device (EL) electrode films for mobile phones, and transparent electrode films for displays.

Hereinafter, the present invention will be described in more detail with reference to Examples. The present invention is not limited by the following examples.

Comparative Examples 1 to 9

Next, using the ingredients and the content ranges shown in Table 1, and then vigorously stirring the PEDT conductive polymer aqueous solution, alcohol solvent, amide-based organic solvent, melamine resin, binder, stabilizer, slip and viscosity reducing additives at about 7 minutes intervals The solution composition was prepared by sequentially adding and uniformly mixing the mixture for about 4 hours.

The mixed solution composition was applied to a transparent substrate and then dried in an oven at about 125 ° C. for about 5 minutes to prepare a polythiophene polymer membrane. At this time, the thickness of the dried polymer film was 5 ㎛ or less.

The physical properties of the polythiophene polymer membrane prepared above were measured by the following method, and the results are shown in Table 4 below.

Composition (g) PEDT aqueous solution Alcohol Amide Solvent Melamine resin Binder (Polyester / Urethane / Alkoxysilane) Comparative Example 1 46.2 MeOH (48.8) FA (2) NMP (1) Melamine (1) PET (aq) (1) Comparative Example 2 46.2 MeOH (46.8) FA (2) NMP (1) Melamine (3) A-187 (1) Comparative Example 3 46.2 MeOH (45.8) FA (2) NMP (1) Melamine (5) - Comparative Example 4 46.2 MeOH (49.8) FA (2) NMP (1) - A-187 (1) Comparative Example 5 46.2 MeOH (48.8) FA (2) NMP (1) - PET (aq) (2) Comparative Example 6 46.2 MeOH (50.8) FA (2) NMP (1) - - Comparative Example 7 46.2 MeOH (46.8) FA (2) NMP (1) - TEOS (4) Comparative Example 8 46.2 MeOH (50.8) FA (2) NMP (1) - - Comparative Example 9 46.2 MeOH (46.8) FA (2) NMP (1) - TEOS (4) PEDT: polyethylenedioxythiophene (made by Bayer), solid content concentration 1.0-1.5% MeOH; Methyl alcohol (manufactured by Aldrich) FA: formamide (manufactured by Aldrich) PET (aq): aqueous solution of 20% solid content of polyethylene terephthalate (manufactured by SKC) NMP: N-methylpyrrolidone (manufactured by Aldrich) A -187: gamma-glycidoxy propyl trimethoxy silane (manufactured by Degus Co., Ltd.) melamine resin: product by Aldrich, solid content = 90% TEOS: tetraethoxysilane (manufactured by Aldrich)

Examples 1-5 and Comparative Examples 10-12

The same procedure as in Comparative Example 1, but the reaction was carried out with the components and contents shown in Table 2 to prepare a mixed solution composition.

The mixed solution composition was applied to a transparent substrate and then dried in an oven at about 125 ° C. for about 5 minutes to prepare a polythiophene-based conductive polymer membrane. At this time, the thickness of the dried polymer film was 5 ㎛ or less.

Composition (g) PEDT aqueous solution Alcohol Amide Solvent Melamine resin Binder (Polyester / Urethane / Alkoxysilane) Metal compound Example 1 26 MeOH (68.095) FA (2) NMP (1) Melamine (2) PET (aq) (0.9) AgNO ₃ (0.005) Example 2 26 EtOH (69.09) FA (2) NMP (1) Melamine (1) R-986 (0.9) CH ₃ COOAg (0.01) Example 3 26 MeOH (61.05) FA (2) NMP (1) NMAA (4) Melamine (5) A-187 (0.9) Ag ₂ CO ₃ (0.05) Example 4 46.2 MeOH (42.7) FA (2) NMP (1) Melamine (5) A-187 (3) AgO (0.1) Example 5 65 MeOH (23.5) FA (2) NMP (1) Melamine (8) - AgNO ₃ (0.25) Ag ₂ CO ₃ (0.25) Comparative Example 10 46.2 EtOH (50.799) FA (2) NMP (1) - - CH ₃ COOAg (0.001) Comparative Example 11 46.2 EtOH (40.9) FA (2) NMP (1) - PET (aq) (2) TEOS (0.9) Ag ₂ CO ₃ (7) Comparative Example 12 46.2 EtOH (32.9) FA (2) NMP (1) - PET (aq) (2) A-187 (0.9) AgO (15) PEDT: polyethylenedioxythiophene (made by Bayer), solid content concentration 1.0-1.5% MeOH; Methyl alcohol (manufactured by Aldrich) FA: formamide (manufactured by Aldrich) PET (aq): aqueous solution of 20% solid content of polyethylene terephthalate (manufactured by SKC) NMP: N-methylpyrrolidone (manufactured by Aldrich) A -187: γ-glycidoxy propyltrimethoxy silane (manufactured by Degus) R-986: aqueous solution of 25% solids of polyurethane (DSM) melamine resin: product by Aldrich, solid content = 90% TEOS: tetra Ethoxysilane (manufactured by Aldrich) AgNO ₃ : Silver nitrate (manufactured by Kojima Chemicals) CH ₃ COOAg: Silver Acetate (manufactured by Acros Organics) Ag ₂ CO ₃ : Silver carbonate (manufactured by Acros Organics) AgO: Silver (II ) Oxide (from Acros Organics)

Examples 6-9 and Comparative Examples 13-15

It was carried out in the same manner as in Comparative Example 1, but the reaction was carried out with the components and contents as shown in Table 3 to prepare a mixed solution composition.

The mixed solution composition was applied to a transparent substrate and then dried in an oven at about 125 ° C. for about 5 minutes to prepare a polythiophene-based conductive polymer membrane. At this time, the thickness of the dried polymer film was 5 ㎛ or less.

Composition (g) PEDT aqueous solution Alcohol Aprotic High Polar Solvent Dispersion Stabilizer Melamine resin Binder (Polyester / Urethane / Alkoxysilane) Metal compound Example 6 26 MeOH (61.95) DMSO (4) EG (6) Melamine (1) PET (aq) (1) Al (OC ₂ H ₅ ) ₃ (0.05) Example 7 50 MeOH (36.9) DMSO (4) EG (6) Melamine (1) R-986 (2) Ti (OCH ₃ ) ₄ (0.1) Example 8 50 MeOH (37.9) DMSO (4) EG (6) Melamine (1) A-187 (1) SnCl ₂ (0.1) Example 9 60 MeOH (26.88) DMSO (4) EG (6) Melamine (1) A-187 (2) Cu (CH ₃ COO) ₂ (0.12) Comparative Example 13 50 MeOH (30) DMSO (10) EG (10) - - Comparative Example 14 20 MeOH (53) DMSO (10) NMFA (1) EG (10) - - CH ₃ COOAg (6.0) Comparative Example 15 50 MeOH (12) DMSO (10) EG (10) - PET (aq) (2) TEOS (6) Ag ₂ CO ₃ (10.0) PEDT: polyethylenedioxythiophene (made by Bayer), solid content concentration 1.0-1.5% MeOH; Methyl alcohol (manufactured by Aldrich) FA: formamide (manufactured by Aldrich) NMFA: N-methyl formamide (manufactured by Aldrich) EG: ethylene glycol (manufactured by Aldrich) PET (aq): 20% solid content of polyethylene terephthalate Phosphorus aqueous solution (made by SKC) NMP: N-methylpyrrolidone (made by Aldrich) DMSO: Dimethyl sulfoxide (made by Aldrich) A-187: γ- glycidoxy propyl trimethoxy silane (made by Degu) R -986: Aqueous solution with 25% solids of polyurethane (DSM) Melamine resin: Aldrich, solids = 90% TEOS: Tetraethoxysilane (Aldrich) Al (OC ₂ H ₅ ) ₃ : Aluminum ( Ⅲ) ethoxide (manufactured by Tokyo kasei Kogyo) Ti (OCH ₃ ) ₄ : Titanium (IV) methoxide (Aldrich) SnCl ₂ : Tin (II) chloride (Aldrich) Cu (CH ₃ COO) ₂ : Kappa (II) acetate (manufactured by Junsei Chemical) CH ₃ COOAg: Silver acetate ( Acros Organics) Ag ₂ CO ₃ : Silver Carbonate (Acros Organics)

Test Example: Property Evaluation

1) Conductivity: Evaluate surface resistance with ohm meter (using Mitsubishi Chemical's Loresta EP MCP-T360).

2) Transparency: Evaluated as UV-Visible 550 nm transmittance. At this time, the transmittance of the transparent substrate is set to 100% and the transmittance after coating is expressed as a ratio (using Minolta CM-3500d).

3) Adhesion: Taping 10 times with Taping Tester and performing relative evaluation with the change of surface resistance (Use Tape: manufactured by Nitto).

Resistance change

① 50 Ω / ㎡ or less: good,

② 50 to 100 Ω / ㎡: normal,

③ 100 Ω / ㎡ or more: Poor

4) Moisture resistance: Evaluated by surface temperature change after evaluating constant temperature and humidity (60 ℃, 90%, 10 days).

Resistance change

① 50 Ω / ㎡ or less: good,

② 50 to 100 Ω / ㎡: normal,

③ 100 Ω / ㎡ or more: Poor

5) Liquid stability: Evaluate after aggregation for 1 week when left at room temperature.

6) Contact resistance (the size of upper film and lower film is irrelevant)

   A) Upper film: Polythiophene-based conductive polymer film according to the invention

   B) Lower Film or Glass

              : ITO Glass (deposition method) used in ITO Film (deposition method, SKC company) or normal contact panel

   C) Manufacturing and evaluation method: In order to maintain upper film and lower film or glass at regular intervals, 1mm spacer is formed and laminated, and after contacting the upper film with 50g pressure, the contact resistance is generated.

             (Measurement equipment: Fluke 187 True RMS Mutimeter)

Resistance change

① 500 ~ 2000 Ω: Good,

② 2000 Ω or more: Poor

The physical properties of the polythiophene polymer membrane prepared above were measured in the same manner as above, and the results are shown in Tables 4 to 6 below.

Properties Conductivity (Ω / ㎡) Transparency (%) Moisture resistance Adhesion Membrane uniformity Liquid stability Contact resistance Comparative Example 1 300 96 Good Good Good Good Bad Comparative Example 2 400 96 Good Good Good Good Bad Comparative Example 3 440 95 Good Good Good Good Bad Comparative Example 4 350 96 Bad Good Good Good Bad Comparative Example 5 480 95 Bad Good Good Good Bad Comparative Example 6 650 95 Bad Bad Good Good Bad Comparative Example 7 850 96 Bad Good Good Good Bad Comparative Example 8 900 96 Bad Bad Good Good Bad Comparative Example 9 900 96 Bad Good Good Good Bad

As shown in Table 4, Comparative Examples 1 to 3 using the melamine resin component according to the present invention was confirmed that the moisture resistance is improved compared to Comparative Examples 4 to 9 without the melamine resin, polythiophene-based polymer Only the membrane using a high contact resistance was confirmed.

Properties Conductivity (Ω / ㎡) Transparency (%) Moisture resistance Adhesion Membrane uniformity Liquid stability Contact resistance Example 1 715 97 Good Good Good Good Good Example 2 772 98 Good Good Good Good Good Example 3 783 97 Good Good Good Good Good Example 4 370 96 Good Good Good Good Good Example 5 320 98 Good Good Good Good Good Comparative Example 10 1100 92 Bad Bad Good Good Bad Comparative Example 11 1756 90 Bad Good Good Good Bad Comparative Example 12 2200 87 Bad Good Good Good Bad

As shown in Table 5, Examples 1 to 5 according to the present invention is improved compared with Comparative Example 10 except the melamine resin and the binder and Comparative Examples 11 to 12 without the melamine resin while simultaneously improving the conductivity and transparency, moisture resistance, adhesion It was confirmed that the film uniformity and liquid stability were excellent, and in particular, in the case of Examples 1 to 5, in which an appropriate amount of ionizable metal compound was added, low contact resistance could be realized.

Properties Conductivity (Ω / ㎡) Transparency (%) Moisture resistance Adhesion Membrane uniformity Liquid stability Contact resistance Example 6 912 97 Good Good Good Good Good Example 7 350 97 Good Good Good Good Good Example 8 330 96 Good Good Good Good Good Example 9 280 95 Good Good Good Good Good Comparative Example 13 354 96 Bad Bad Good Good Bad Comparative Example 14 2880 96 Bad Bad Good Bad Bad Comparative Example 15 1650 95 Bad Good Good Good Bad

As shown in Table 6, Examples 6 to 9 according to the present invention, while improving the conductivity and transparency at the same time, compared to Comparative Examples 13 to 14, except for the melamine resin and the binder and Comparative Example 15 without the melamine resin, It was confirmed that the film uniformity and liquid stability is excellent, and in particular, the moisture resistance is improved, and in particular, in the case of Examples 6 to 9 in which an appropriate amount of the ionizable metal compound was added, it was confirmed that low contact resistance could be realized.

1 is a method and configuration for measuring the contact resistance of a polymer film according to the present invention [1: lower substrate, 2: ITO layer (deposition), 3: insulating layer (Dot Spacer), 4: conductive polymer film, 5: Upper board, 6: Touch pen or finger, 7: Controller]

2 is a cross-sectional configuration diagram of a contact panel film and a display electrode film according to the present invention [1: Back surface treatment type, 2: substrate, 3: conductive polymer film]

Claims (15)

A polythiophene-based conductive polymer solution composition containing a metal compound capable of ionization, having a conductivity of 1 ㏀ / m 2 or less, a transmittance of 95% or more, and a low contact resistance of 500 to 2 폴리. Offensive conductive polymer membrane. The metal compound of claim 1, wherein the metal compound is Al (OC ₂ H ₅ ) ₃ , AgNO ₃ , Ti (OCH ₃ ) ₄ , SnCl ₂ , CH ₃ COOAg, Ag ₂ CO ₃ , AgO, Cu (CH ₃ COO) ₂ 1 selected from Mg (OH) ₂ , SnCl ₄ , TiO, Li ₂ C ₂ O ₄ , CH ₃ LiO, Ca (OH) ₂ , Cu (OH) ₂ , Cu (SO) ₄ and Na ₂ S ₂ O ₈ A polythiophene-based conductive polymer membrane, characterized in that it is at least a metal compound. The method of claim 1, The polythiophene-based conductive polymer solution composition 1) 20 to 70% by weight of a polythiophene-based conductive polymer aqueous solution, 2) 10 to 75% by weight alcoholic organic solvent, 3) 1 to 10% by weight of an amide organic solvent or an aprotic high polar solvent, 4) 0.005 to 5% by weight of ionizable metal compounds, 5) melamine resin 1-10 wt%, and 6) 0.1 to 5 wt% binder selected from polyester, polyurethane and alkoxy silane Polythiophene-based conductive polymer membrane comprising a. 4. The polythiophene-based conductive polymer membrane of claim 3, wherein the polythiophene-based conductive polymer solution is doped with polystyrene sulfonate in polyethylene dioxythiophene. The polythiophene-based conductive polymer membrane according to claim 3, wherein the polythiophene-based conductive polymer aqueous solution of 1) has a solid content of 1.0 to 1.5% by weight. The polythiophene-based conductive polymer membrane of claim 3, wherein the alcohol-based organic solvent of 2) is an alcohol having 1 to 4 carbon atoms. The amide solvent of claim 3, wherein the amide solvent is formamide (FA), N-methylformamide (NMFA), N, N-dimethylformamide (DMF), acetamide (AA), or N-methyl. Polythiophene-based conductive polymer membrane, characterized in that at least one selected from acetamide (NMAA), N- dimethylacetamide (DMA) or N-methylpyrrolidone (NMP). 4. The polythiophene conductive polymer membrane according to claim 3, wherein the aprotic high polar solvent of 3) is at least one selected from dimethyl sulfoxide (DMSO) and propylene carbonate. 4. The polythiophene conductive polymer membrane according to claim 3, wherein when the aprotic high polar solvent is used, a dispersion stabilizer is added in an amount of 1 to 10% by weight based on the polythiophene conductive polymer solution composition. 10. The polythiophene-based conductive polymer membrane according to claim 9, wherein the dispersion stabilizer is at least one selected from ethylene glycol, glycerin, and sorbitol. 4. The polythiophene-based conductive polymer membrane according to claim 3, wherein the binder is methyl tri-methoxy silane or tetra ethoxysilane. [Claim 2] The polythiophene according to claim 1, wherein the polythiophene-based conductive polymer solution composition is formed on a glass, a cast polypropylene (CPP) film, a polyethylene terephthalate film, a polycarbonate or an acrylic panel. Conductive polymer membrane. The polythiophene-based conductive polymer membrane according to claim 1, wherein the membrane is used as an upper / lower electrode film for a contact panel, an inorganic electroluminescent device (EL) electrode film, or a transparent electrode film for display. 15. The poly film according to claim 13, wherein the upper and lower electrode films for the contact panel or the transparent electrode film for the display have a cross-sectional configuration as shown in FIG. Thiophene-based conductive polymer membrane. 1) 20 to 70% by weight of a polythiophene-based conductive polymer aqueous solution, 2) 10 to 75% by weight alcoholic organic solvent, 3) 1 to 10% by weight of an amide organic solvent or an aprotic high polar solvent, 4) 0.005 to 5% by weight of ionizable metal compounds, 5) melamine resin 1-10 wt%, and 6) 0.1 to 5 wt% binder selected from polyester, polyurethane and alkoxy silane A conductive polymer solution composition comprising a.

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