TWI491688B - Transparent conductive film including coating composition for high refractive layer - Google Patents

Description

Transparent conductive film comprising a composition for coating a high refractive layer

The present invention relates to a transparent conductive film comprising a composition for coating a high refractive layer.

According to the method of detecting the position, the touch panel has an optical method, an ultrasonic method, an electrostatic capacity method, a resistive film method, and the like. In the resistive film type touch panel, the transparent conductive film and the glass to which the transparent conductor layer is attached are sandwiched between the spacers, and the transparent conductive film is electrically connected to measure the voltage of the glass to which the transparent conductor layer is attached. On the other hand, the electrostatic capacitance type touch panel has a basic structure with a transparent conductive layer on a substrate, is characterized by no running portion, and has high durability and high transmittance, and is therefore suitable for use in an in-vehicle use or the like.

A transparent conductive film suitable for the above-mentioned touch panel is generally formed on one side of a transparent film substrate, and a lacquer layer and a conductive layer are formed from the film substrate side in this order, and Japanese Patent Laid-Open Publication No. 2003-197035 discloses A transparent conductive film having a primer layer formed between the substrate film and the conductive layer.

However, the primer layer is formed of two layers having different refractive indices, and only a zinc oxide-based tin oxide film having a high refractive index of 600 Å is disposed on the substrate film side and disposed on the conductive layer side. The structure of the low refractive index ruthenium oxide film having a thickness of 450 Å is not described for the specific coating composition of the high refractive layer, and therefore, it is used to simultaneously ensure the adjustment of the high refractive index and Research on durable high refractive coating compositions continues.

An embodiment of the present invention provides a composition for high refractive coating which comprises a fluorene derivative resin and which can ensure a high refractive index and maintain physical properties of a transparent conductive film.

Still another embodiment of the present invention provides a transparent conductive film which is excellent in transmittance of physical properties such as hardness, because it is easy to adjust optical characteristics, thereby reducing pattern visibility.

An embodiment of the present invention provides a composition for coating a high refractive layer comprising an acrylate resin, a fluorene derivative resin, and metal oxide particles.

The above acrylate resin, about 1 part by weight to about 50 parts by weight of the above hydrazine derivative resin, and about 5 parts by weight to about 80 may be contained with respect to 100 parts by weight of the total solid amount. Parts by weight of the above metal oxide particles.

In an embodiment of the invention, the anthracene derivative resin may be selected from the group consisting of fluorene, fluorenone, 2-acetamide fluorene, 2-mercaptomethyl 2-acetyl fluorene, 2-acetamino fluorene, 9-bromo-9-penylfluorene, 2,7-diaminopurine (2, 7-diaminofluorene), 2,7-di(acetamide)fluorene, 2,7-diacetylfluorene, 9,9- [9-9-bis[4-(2-hydroxyethoxy)phenyl]fluorene), 9,9-bis(3,4-dicarboxyphenyl) 9,9bis(3,4dicarboxypenyl)fluorene anhydride, 9,9-bis(3-metyl-4-hydroxypenyl)fluorene 9,9-bis(4-hydroxypenyl)fluorene, 9,9-bis(4-aminophenylyl)fluorene, 9,9-bis(4-hydroxy-3-methylphenyl)fluorene (9,9- Bis(4-hydroxy-3-metylpenyl)fluorene), 9,9-bis[4-(2-propenylethoxy)phenyl]indole (9,9-bis[4-(2-acryloyloxyethoxy)] Penyl]fluorene), 9,9-bis[4-(2-hydroxy-3-propenylpropoxy)phenyl]indole (9,9-bis[4-(2-hydroxy-3-acryloyloxypropoxy)penyl Fluorene), 9,9-bis(4-hydroxypenyl)fluorene, 2-acrylic acid 1,1'[9H-芴-9-subunit double [4] , 1-propenoic acid 1,1'[9H-fluorene-9-ylidenebis[4,1-penylenoxy(2-hydroxy-3, 1-propantyl)]]ester) and one of the groups of their combinations.

In an embodiment of the invention, the metal compound particles may be selected from the group consisting of titanium dioxide (TiO ₂ ), zirconium oxide (ZrO ₂ ), aluminum oxide (Al ₂ O ₃ ), tin dioxide (SnO ₂ ), indium oxide. Tin (ITO, indium-tin oxide), antimony tin oxide (ATO), antimony pentoxide (Sb ₂ O ₅ ), antimony trioxide (Nb ₂ O ₃ ), antimony trioxide (Y) One of a group of ₂ O ₃ ), cerium oxide (SiO ₂ ), and combinations thereof.

In an embodiment of the invention, the metal compound particles may have an average particle diameter of from about 1 nanometer (nm) to about 100 nanometers (nm).

In an embodiment of the invention, the high refractive layer coating composition may further comprise a photoinitiator.

In an embodiment of the invention, from about 1 part by weight to about 15 parts by weight of the photoinitiator may be included with respect to 100 parts by weight of total solids.

Still another example of the present invention provides a transparent conductive film including using the above-mentioned high A high refractive layer formed of the composition for refractive layer coating.

In an embodiment of the invention, the transparent conductive film may be a laminated structure of a transparent substrate, the high refractive layer, the low refractive layer, and the conductive layer.

In an embodiment of the invention, the high refractive layer may have a refractive index of from about 1.6 to about 1.8.

In an embodiment of the invention, the high refractive layer may have a thickness of from about 20 nanometers (nm) to about 150 nanometers (nm).

In an embodiment of the invention, the low refractive layer may have a thickness of from about 5 nanometers (nm) to about 100 nanometers (nm).

In an embodiment of the invention, the transparent substrate may comprise a component selected from the group consisting of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyether oxime (PES), Polycarbonate (PC), polypropylene (PP), polyvinyl chloride (PVC), polyethylene (PE), polymethyl methacrylate (PMMA), ethylene vinyl alcohol (EVA), polyvinyl alcohol (PVA) And a single layer film or a laminate film of any one of the combinations of them.

In an embodiment of the invention, the conductive layer may comprise Indium Tin Oxide (ITO) or Fluorine-doped Tin Oxide (FTO).

In an embodiment of the invention, the transparent substrate has a hard coat layer on one or both sides.

In an embodiment of the present invention, the refractive index range of the high refractive layer including the high refractive coating layer composition is enlarged, and the optical characteristics of the transparent conductive film of the vapor-deposited conductive layer can be easily adjusted.

Moreover, the pencil hardness, the solubility resistance, and the like of the above transparent conductive film can be ensured. Excellent properties, gas barrier properties, etc., can also have excellent transmittance.

1‧‧‧Transparent substrate

2‧‧‧hard coating

3‧‧‧High refractive layer

4‧‧‧Low refractive layer

5‧‧‧ Conductive layer

10‧‧‧Transparent conductive film

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view schematically showing a transparent conductive film according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view schematically showing a transparent conductive film according to still another embodiment of the present invention.

Hereinafter, examples of the invention will be described in detail. However, this is only an exemplification, and the present invention is not limited thereto, and the present invention is defined in accordance with the scope of the appended claims.

In order to clarify the invention, parts that are not related to the description are omitted, and the same reference numerals will be used for the same or similar structural components throughout the specification.

In order to more clearly represent a plurality of layers and regions in the drawings, the thickness is shown to be enlarged. Moreover, in the drawings, the thickness of a portion of the layers and regions are exaggerated for convenience of explanation.

Hereinafter, the "upper (or lower)" of the substrate or the "upper (or lower)" of the substrate forms an arbitrary structure, and it means that not only an arbitrary structure is formed on the upper surface (or the lower surface) of the substrate, It also means that other structures are not included between the above-described substrate and any structure formed on (or under) the substrate.

An example of the present invention provides a composition for coating a high refractive layer comprising an acrylate resin, an anthracene derivative resin, and metal oxide particles.

In general, when preparing a composition for coating a high refractive layer, in order to adjust the refractive index, metal oxide nanoparticles such as zirconium oxide (ZrO ₂ ), titanium oxide (TiO ₂ ), or antimony tin oxide (ATO) are usually used. An acrylic monomer having a refractive index of from about 1.49 to about 1.53 and an ultraviolet curable reactive oligomer. However, when the refractive index of the composition for coating a high refractive layer is adjusted only by the content of the above metal oxide nanoparticles, the curing rate of the composition for coating a high refractive layer is reduced, and the physical properties of the high refractive layer are lowered. There are difficulties in ensuring the physical properties of the high refractive layer.

On the other hand, the high refractive layer coating composition contains both metal oxide particles and an anthracene derivative resin, so that the composition of the high refractive layer coating composition can be ensured even when the content of the metal oxide particles is reduced. The refractive index also ensures enhanced physical properties.

The high refractive layer coating composition may contain an acrylate resin, and the acrylate resin may be a photocurable type. Curing by an active energy ray such as an ultraviolet ray or an electron beam provides durability and resistance to an external environment of high temperature and high humidity, and can be used for the purpose of adjusting the refractive index.

In this case, the acrylate may include an alkyl (meth) acrylate, a polyalkylene glycol (meth) acrylate, a carboxyl group, and a (meth)acrylic compound containing an unsaturated double bond, and a hydroxyl group-containing compound. A (meth)acrylic compound, a nitrogen-containing (meth)acrylic compound, or the like. Further, an acrylic oligomer such as epoxy (meth) acrylate, urethane (meth) acrylate, polyester (meth) acrylate or polyether (meth) acrylate may be contained.

Specifically, the above acrylate resin may be selected from the group consisting of Dipentaerythritol hexa-acrylate, Dipentaerythritol penta-acrylate, Pentaerythritol triacrylate, tetramethylol methane. Tetramethylol methane tetra acrylate, Tetramethylol methane triacrylate, Trimethanol propane triacrylate, 1,6-hexanediol diacrylate (1, 6-Hexanediol diacrylate), Polyethylene glycol diacrylate, Diethylene glycol acrylate, Triethylene glycol acrylate, Tetraethylene glycol acrylate ( Tetraethylene glycol acrylate), Hexa-ethylene glycol acrylate, Propyl acrylate, Butylacrylate, Pentylacrylate, 2-ethylhexyl acrylate (2) -Ethylhexyl acrylate), Octyl acrylate, Nonyl acrylate, Bisphenol A diglycidyl diacrylate, Bisphenol A epoxy acrylate One of a group of Ethylene oxide-added bisphenol A diacrylate, 2-phenoxy ethyl acrylate, and combinations thereof.

More specifically, about 1 part by weight to about 50 parts by weight of the above acrylate resin may be contained with respect to 100 parts by weight of the total solid amount of the high refractive layer coating composition. When the above acrylate resin is contained in an amount of less than about 1 part by weight, the pencil hardness and the adhesion of the composition cannot be ensured; and when it is more than about 50 parts by weight, it is difficult to increase the refractive index even if the content of the metal oxide particles is adjusted to increase the refractive index. It may also be difficult to ensure the physical properties of the coating composition. Therefore, by maintaining the acrylate resin contained in the above range, it is possible to easily achieve the advantage of adjusting the refractive index while ensuring physical properties.

The high refractive layer coating composition may contain an anthracene derivative resin, and the above anthracene derivative resin may be a photocurable resin. The anthracene derivative resin contains a compound which is guided mainly by ruthenium as an aromatic hydrocarbon, and is used for improving the low refractive index of an organic substance, improving heat resistance, adhesion of a substrate, and compatibility with an inorganic substance. And, in order to solve the high density in the molecular structure It has low solubility and can be chemically bonded to the surface of the metal oxide particles, and can also contain a hydroxy grou.

Specifically, the above anthracene derivative resin may be selected from the group consisting of ruthenium, fluorenone, 2-acetamidoguanidine, 2-mercaptomethylketone, 2-ethylaminoguanidine, 9-bromoindole, 9-bromo- 9-phenylindole, 2,7-diaminopurine, 2,7-di(acetamido)fluorene, 2,7-diethylhydrazine, 9,9-bis[4-(2-hydroxyethyl) Oxy)phenyl]anthracene, 9,9-bis(3,4-dicarboxyphenyl)phthalic anhydride, 9,9-bis(3-methyl-4-hydroxyphenyl)anthracene, 9,9-double (4-Hydroxyphenyl)anthracene, 9,9-bis(4-aminophenyl)anthracene, 9,9-bis(4-hydroxy-3-methylphenyl)anthracene, 9,9-bis[4- (2-propenyl ethoxyethoxy)phenyl]anthracene, 9,9-bis[4-(2-hydroxy-3-propenylpropoxy)phenyl]anthracene, 9,9-bis(4- Hydroxyphenyl)anthracene, 2-acrylic acid 1,1'[9H-fluorene-9-ylidene bis[4,1-carbo(2-hydroxy-3,1-propanyl)]]ester and combinations thereof One of the groups.

More specifically, about 1 part by weight to about 50 parts by weight of the above-mentioned anthracene derivative resin may be contained with respect to 100 parts by weight of the total solid amount of the composition for coating the high refractive layer. When the above-mentioned fluorene derivative resin is contained in an amount of less than about 1 part by weight, the high refractive index of the composition may not be maintained, and thus there may be a problem of containing an excessive amount of metal oxide particles. Further, when the above-mentioned anthracene derivative resin is contained in an amount of more than about 50 parts by weight, it is difficult to secure the pencil hardness of the high refractive layer. Therefore, maintaining the above range provides an advantage in adjusting the refractive index and securing physical properties.

The high refractive layer coating composition may contain metal oxide particles. In this case, the metal oxide particles may be selected from the group consisting of titanium oxide (TiO ₂ ), zirconium oxide (ZrO ₂ ), aluminum oxide (Al ₂ O ₃ ), tin dioxide (SnO ₂ ), indium tin oxide (ITO, indium). -tin oxide), antimony tin oxide (ATO), antimony pentoxide (Sb ₂ O ₅ ), niobium trioxide (Nb ₂ O ₃ ), antimony trioxide (Y ₂ O ₃ ), One of a group of cerium oxide (SiO ₂ ) and combinations thereof.

Specifically, about 5 parts by weight to about 80 parts by weight of the above metal oxide particles may be contained with respect to 100 parts by weight of the total solid amount of the high refractive layer coating composition. When the above metal oxide particles are contained in an amount of less than about 5 parts by weight, there is a problem that the refractive index is lowered, and when it is more than about 80 parts by weight, it may be difficult to secure the physical properties of the composition. Therefore, the above-described ruthenium derivative resin is contained together with the above metal oxide particles, and exhibits excellent high refractive index and physical properties.

The above metal oxide particles have an average particle diameter of from about 1 nanometer (nm) to about 100 nanometers (nm), and specifically may be from about 1 nanometer (nm) to about 30 nanometers (nm). The average particle diameter is an average value calculated by measuring the particle diameters of several particles. When the average particle diameter of the metal oxide particles is out of the above range, the surface illuminance of the high refractive layer including the metal oxide particles may be high, and The scattering of light may increase the haze. Therefore, by maintaining the average particle diameter range of the above metal oxide particles, a high refractive layer excellent in optical characteristics can be easily realized.

The high refractive layer coating composition may further contain a photoinitiator in addition to the acrylate resin, the anthracene derivative resin, and the metal oxide particles. The photoinitiator is used to form a composition for coating a high refractive layer in order to carry out a photocuring reaction. Specifically, about 1 part by weight to about 15 parts by weight of the above photoinitiator is contained with respect to 100 parts by weight of the total solid amount, whereby the photocuring reaction can be promoted.

As the photoinitiator, one selected from the group consisting of 1-hydroxy-cyclohexyl-phenyl-ketone, 2-methyl-1-[4-(methylthio)phenyl 2-methyl-1-[4-(methylthio)phenyl]-2-morpholino propane-1-one), Benzyl dimethyl ketone, 1-(4-dodecylbenzene 2-hydroxy-2-methylpropane-1-one (1-(4-dodecyl phenyl)-2-hydroxy-2-methylpropane-1-one), 2-hydroxy-2-methyl-1- Phenylpropan-1-one (2-hydroxy-2-methyl-1-methylpropane-l-one), 1-(4-isopropylbenzene)-2-hydroxy-2-methylpropan-1-one ( 1-(4-isopropylphenyl)-2-hydroxy-2-methyl propane-1-one), Benzophenone, 2,2-Dimethoxy-2-phenylacetophenone (2,2 -dimethoxy-2-phenyl acetphenone), 2,2-diethoxy-2-phenylacetone, 2-hydroxy-2-methyl-1-propane 2-hydroxy-2-methyl-1-propane-1-one, 4,4'-diethyl amino benzophenone, dichlorobenzophenone (Dichloro benzophenone), 2-methyl anthraquinone, 2-Ettal anthraquinone, 2-methyl thioxanthone, 2-ethyl 2-ethyl oxanthone, 2,4-dimethyl thioxanthone, 2,4-diethyl thioxanthone And one of the groups of their combinations.

Another example of the present invention provides a transparent conductive film comprising a high refractive layer formed using a composition for coating a high refractive layer containing an acrylate resin, an anthracene derivative resin, and metal oxide particles.

Fig. 1 is a view schematically showing a cross section of a transparent conductive film according to an embodiment of the present invention. Referring to Fig. 1, the transparent conductive film 10 is a laminated structure of a transparent substrate 1, a hard coat layer 2, a high refractive layer 3, a low refractive layer 4, and a conductive layer 5.

The transparent substrate 1 may contain a film excellent in transparency and strength. Specifically, the transparent substrate 1 may be selected from the group consisting of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyether oxime (PES), and polycarbonate (PC). ), polypropylene (PP), polyvinyl chloride (PVC), Morphology of a single layer film or a laminate film of one of a group of polyethylene (PE), polymethyl methacrylate (PMMA), ethylene vinyl alcohol (EVA), polyvinyl alcohol (PVA), and a combination thereof .

The high refractive layer 3 and the low refractive layer 4 function to improve insulation and transmittance between the transparent substrate 1 and the conductive layer 5. In this case, the high refractive layer coating composition can be used for the high refractive layer. To form.

The high refractive layer may have a refractive index of from about 1.6 to about 1.8. In the process of forming the high refractive layer described above, the refractive index can be adjusted to about 1.6 to about 1.8 as a result of using the composition for coating a high refractive layer containing an acrylate resin, an anthracene derivative resin, and metal oxide particles. The visibility and total light transmittance of the transparent conductive film as a whole can be improved.

The high refractive layer 3 may have a thickness of about 20 nanometers (nm) to about 150 nanometers (nm), and the low refractive layer 4 may have a thickness of about 5 nanometers (nm) to about 100 nanometers (nm). For example, the total thickness of the high refractive layer 3 and the low refractive layer 4 may be about 25 nanometers (nm) to about 250 nanometers (nm), and the total thickness of the high refractive layer 3 and the low refractive layer 4 is less than about 25 nanometers. When the thickness is too small, the effect of improving the transmittance and the visibility is insufficient, and when the total thickness of the high refractive layer 3 and the low refractive layer 4 is more than 250 nm (nm), for example, low When the thickness of the refractive layer 4 is larger than about 100 nanometers (nm), cracks and curls may occur due to an increase in stress of each layer.

The conductive layer 3 is formed on the upper portion of the low refractive layer 4 and may include indium tin oxide (ITO) or fluorine-doped tin oxide (FTO).

2 is a view schematically showing a cross section of a transparent conductive film according to still another embodiment of the present invention, and in FIG. 2, a hard coat layer 2 is further formed on a lower portion of the transparent substrate 1. Hard coating 2 to enhance the surface The effect of the hardness can be utilized without limitation as long as it can be used for forming a hard coat layer.

As shown in FIG. 1, the hard coat layer 2 may be formed only on one side of the transparent substrate 1, but as shown in FIG. 2, it may be formed on both sides of the transparent substrate 1.

Hereinafter, specific embodiments of the present invention are proposed. However, the examples described below are merely intended to specifically illustrate or illustrate the invention, and the invention is not limited thereto.

Preparation Example 1 - High Refractive Layer Coating Composition

The composition for high-refractive-layer coating is prepared by including an ultraviolet curable acrylate resin, an ultraviolet curable fluorene derivative resin, and metal oxide nanoparticles according to the structure and content described in Table 1 below.

Preparation Example 2 - Hard Coating Composition

20 parts by weight of dipentaerythritol hexaacrylate, 60 parts by weight of HX-920UV (Kyoeisha, Kyoeisha), and 15 parts by weight of vermiculite fine particles (product name: XBA-ST) were mixed with respect to 100 parts by weight of the total solid amount. , Yishan Chemical), 5 parts by weight of photopolymerization initiator After Irgacure-184 (Ciba, Ciba), it was diluted with a dilution solvent of methyl ethyl ketone (MEK) to prepare a hard coat composition (refractive index of 1.52) having a solid content of 45%.

Preparation Example 3 - Low Refractive Layer Coating Composition

Tetra-ethoxy ortho silicate was mixed with water and ethanol at a ratio of 1:2:2, and a 0.1 mol (mol) nitric acid solution was added thereto to carry out a reaction for 24 hours to synthesize A sol having a refractive index of 1.43. The synthesized sol was diluted with methyl ethyl ketone (MEK) to prepare a composition for coating a low refractive layer having a solid content of 5%.

Examples and comparative examples Example 1

The hard coat composition prepared in Preparation Example 2 was coated on a 125 μm (polym) polyethylene terephthalate (PET) film using a Meyer bar to a dry film thickness of 1.5. The film was prepared in micrometers (μm) by irradiating 300 mJ of ultraviolet rays with a 180 W (W) high-pressure mercury lamp and curing. On the reverse side of the film prepared above, the hard coat composition prepared in Preparation Example 2 was applied to a dry film having a thickness of 1.5 μm (μm) in the same manner as described above, and after curing, a double-sided film was prepared. Both include hard coated films.

Thereafter, the composition for coating the high refractive layer prepared in Preparation Example 1-1 was coated on one side of the film including the hard coat layer on both sides, and the thickness of the dried film was 50 nm (nm). A 180 watt (W) high pressure mercury lamp illuminates 300 mJ of ultraviolet light and cures to form a high refractive layer. Thereafter, in the above-mentioned high refractive layer, the low refractive layer coating liquid composition prepared in Preparation Example 3 was applied to a dry film having a thickness of 20 nm (nm), and it was allowed to stand in an oven at 150 ° C for 1 minute. Cured to form a low refractive layer. At this time, an indium tin oxide (ITO) layer having a thickness of 20 nm (nm) was formed on the low refractive layer by using an indium tin oxide (ITO) target of indium:tin=95:5, thereby preparing a transparent layer. Conductive film.

Example 2

A transparent conductive film was produced in the same manner as in the above Example 1, except that the composition for coating a high refractive layer was applied to Preparation Example 1-2, and the thickness of the high refractive layer was 45 nm (nm).

Example 3

A transparent conductive film was produced in the same manner as in the above Example 1, except that the composition for coating a high refractive layer was applied to Preparative Example 1-3, and the thickness of the high refractive layer was applied to 40 nm (nm).

Comparative example 1

A transparent conductive film was produced in the same manner as in the above Example 1, except that the composition for coating a high refractive layer was applied to Preparative Example 1-4, and the thickness of the high refractive layer was 50 nm (nm).

Comparative example 2

A transparent conductive film was produced in the same manner as in the above Example 1, except that the composition for coating a high refractive layer was applied to Preparative Example 1-5, and the thickness of the high refractive layer was applied to 50 nm (nm).

Comparative example 3

A transparent conductive film was produced in the same manner as in the above Example 1, except that the composition for coating a high refractive layer was applied to Preparative Example 1-6, and the thickness of the high refractive layer was 45 nm (nm).

Experimental Example - Physical Properties of Transparent Conductive Film

The following physical properties were measured by the transparent conductive films of the above examples and comparative examples, and the results are shown in Table 2 below.

1) Refractive index: The refractive index at each wavelength was measured using a prism coupler (Prism coupler) using a laser of 532 nm (nm), 632.8 nm, and 830 nm, and 550 was obtained by Causy plot. The refractive index in nanometers.

2) Pencil hardness: measured in accordance with JIS K 5600-5-4.

3) Adhesiveness: The surface of the coating layer is cut into a checkerboard pattern by a cutter at a pitch of 1 mm (mm) and a width of 10 mm × 10 mm × length, using a transparent tape (Nichiban, Miqibang Company) ) to carry out the peel test. The same portion was subjected to a peeling test three times with a tape, and the number of the adhering digits was marked by /100 after the evaluation.

4) Transmittance, transmission b*/reflection b*: Total light transmittance and transmission b*/reflection b* value were measured using CM-5 (Konica Minolta, Konica Minolta).

5) Etching evaluation: A photosensitive resin was coated on an indium tin oxide (ITO) layer by a mask patterned with a regular square, dried and solidified, and then immersed in a 5% hydrochloric acid aqueous solution at 25° C. for 1 minute to carry out etching. Etching evaluation of an indium tin oxide (ITO) layer.

6) Measurement of the difference (ΔR) between the reflectance before and after etching (Etching) and confirming the pattern concealing force: The reflectance was measured by CM-5 before/after etching (Etching), and the difference in reflectance was obtained and passed. The visual concealment force is confirmed by the naked eye.

Table 2

From the measurement results, it can be understood that the transparent conductive films of Examples 1 to 3 have excellent hardness, transmittance, and visibility. Specifically, in the case of the transparent conductive film of Comparative Example 1 comprising a high refractive layer formed of the coating composition of Preparation Examples 1 to 4 which does not contain an anthracene derivative, the measured refractive index of the high refractive layer was low. Further, the difference between the measured transmittance and the pre-etching/post-reflection ratio is higher than that of the first to third embodiments, and the pattern concealing force is also inferior. Therefore, it is understood that the optical properties as the transparent conductive film are not excellent.

Including a coating composition prepared in Preparation Examples 1-5 which does not contain an anthracene derivative In the case of the transparent conductive film of Comparative Example 2 of the high refractive layer, since the refractive index of the high refractive layer is similar to that of Example 1, it has excellent optical characteristics and pattern concealing force, but the physical rigidity and the adhesion cannot ensure the physical property. characteristic.

Further, in the case of the transparent conductive film of Comparative Example 3 including the high refractive layer formed of the coating composition of Preparation Example 1-6 containing an anthracene derivative, but not including the ultraviolet curable acrylate, since the anthracene derivative was contained Therefore, a higher refractive index is measured in terms of the refractive index of the high refractive layer, but the following evaluation is generally obtained in terms of pencil hardness and adhesion, and therefore, it is difficult to apply to the transparent conductive film.

As described above, it is understood that the refractive index of the high refractive layer formed of the composition for coating a high refractive layer containing the ultraviolet curable acrylate resin, the ultraviolet curable fluorene derivative resin, and the metal oxide nanoparticles can be From 1.6 to 1.8, the transparent conductive film including the composition for coating a high refractive layer can simultaneously ensure excellent optical properties and physical properties such as hardness, transmittance, and visibility.

The present invention has been disclosed in its preferred embodiments, and is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

1‧‧‧Transparent substrate

2‧‧‧hard coating

3‧‧‧High refractive layer

4‧‧‧Low refractive layer

5‧‧‧ Conductive layer

10‧‧‧Transparent conductive film

Claims (9)

A transparent conductive film comprising a high refractive layer formed by using a composition for coating a high refractive layer, the high refractive layer coating composition comprising an acrylate resin, an anthracene derivative resin, and metal oxide particles, wherein 13 parts by weight to 20 parts by weight of the acrylate resin, 18 parts by weight to 31 parts by weight of the oxime derivative resin, and 45 parts by weight to 65 parts by weight of the metal oxide based on 100 parts by weight of the total solid amount Particles, and the high refractive layer has a refractive index of 1.6 to 1.8. The transparent conductive film according to claim 1, wherein the acrylate resin or the oxime derivative resin is a photocurable resin. The transparent conductive film according to claim 1, wherein the anthracene derivative resin is selected from the group consisting of ruthenium, anthrone, 2-acetamidoguanidine, 2-mercaptomethylketone, 2-ethylaminoguanidine , 9-bromoindole, 9-bromo-9-phenylindole, 2,7-diaminopurine, 2,7-di(ethylammonium)pyrene, 2,7-diethylhydrazine, 9,9 - bis[4-(2-hydroxyethoxy)phenyl]anthracene, 9,9-bis(3,4-dicarboxyphenyl)phthalic anhydride, 9,9-bis(3-methyl-4-hydroxyl Phenyl) ruthenium, 9,9-bis(4-hydroxyphenyl)anthracene, 9,9-bis(4-aminophenyl)anthracene, 9,9-bis(4-hydroxy-3-methylphenyl) Indole, 9,9-bis[4-(2-propenylethoxy)phenyl]anthracene, 9,9-bis[4-(2-hydroxy-3-propenylpropenyloxy)phenyl] Indole, 9,9-bis(4-hydroxyphenyl)anthracene, 2-acrylic acid 1,1'[9H-fluorene-9-ylidene bis[4,1-carbo(2-hydroxy-3,1-propane) One of the groups of esters and their combination. The transparent conductive film according to claim 1, wherein the metal compound particles are selected from the group consisting of titanium oxide, zirconium oxide, aluminum oxide, tin dioxide, indium tin oxide, antimony tin oxide, antimony pentoxide, and trioxide. Group of diterpenoids, antimony trioxide, antimony oxide, and combinations thereof One of the groups. The transparent conductive film according to claim 1, wherein the metal compound particles have an average particle diameter of 1 nm and 100 nm. The transparent conductive film of claim 1, further comprising a photoinitiator. The transparent conductive film according to claim 6, wherein 100 parts by weight of the total solid amount contains 1 part by weight to 15 parts by weight of the photoinitiator. The transparent conductive film according to claim 1, wherein the transparent conductive film is a laminated structure of a transparent substrate, the high refractive layer, the low refractive layer, and the conductive layer. The transparent conductive film according to claim 1, wherein the high refractive layer has a thickness of from 20 nm to 150 nm.