KR102231263B1 - Hard coating composition, hard coating layer and display device comprising the same - Google Patents

Abstract

The hard coating composition according to an embodiment of the present invention comprises 40 to 80 parts by weight of an epoxy resin, 10 to 50 parts by weight of AHHFP (2,2′-bis (3-amino-4-hydroxyphenyl) hexafluoropropane), and an acrylate resin. 30 to 60 parts by weight, and 0.1 to 5 parts by weight of a photoinitiator.

Description

Hard coating composition, hard coating layer and display device including the same TECHNICAL FIELD [HARD COATING COMPOSITION, HARD COATING LAYER AND DISPLAY DEVICE COMPRISING THE SAME}

The present invention relates to a hard coating composition, a hard coating layer including the same, and a display device.

In general, important commercial products including optical functional products such as cover windows, touch screens, lenses, automobile sunroofs, optical screens, light guide plates and LED front plates of various electronic products have been widely used as glass. However, glass is heavy and fragile, and has a disadvantage in that the defect rate is considerably high during product processing. Therefore, a lot of research has been conducted to replace glass with plastic. Thermosetting and thermoplastic polymers used in plastics have excellent stiffness, dimensional stability, transparency, and impact resistance, but are weak in abrasion resistance, heat resistance, solvent resistance, and chemical resistance. There is a problem.

Therefore, in order to protect the resin products from physical or mechanical damage, it is used by coating a wear-resistant hard coating on the surface of the plastic. Existing hard coating agents simply use organic materials or use thermal curing to achieve high hardness. However, the tact time is prolonged, and there is a problem of environmental pollution due to evaporation of the solvent. In addition, compared to glass, hard coatings made of organic materials have a lower dielectric constant, so the touch feel is inferior when used as a cover for a smartphone or tablet PC. In the case of the touch cover window, a multilayer structure (hard coating layer, fingerprint layer) is used to impart high hardness and fingerprint properties. However, the multi-layered structure causes a problem of poor adhesion and coatability between layers. In addition, due to the multi-layered structure, the number of process steps increases, resulting in an increase in process time and process cost.

On the other hand, in order to improve the properties of the hard coating layer, a functional compound is often used. Functional compounds such as fluorine-based compounds have the advantage of strong slip properties and anti-fingerprint properties due to low surface energy, but they cannot be mixed due to their low compatibility with hard coating agents, so they must be separately coated on the hard coating layer. When designing a single layer by mixing a functional compound such as a fluorine-based compound in the hard coating layer, the functional compound is a non-curing compound that only floats on the surface without being combined with the hard coating agent. By disappearing in a short period of time, there is a problem that the slip property and fingerprint resistance are deteriorated.

The present invention provides a hard coating composition capable of reducing process time and process cost by improving transmittance, heat resistance, and durability, and implementing a single layer structure, and a hard coating film and a display device including the same.

To achieve the above object, the hard coating composition according to an embodiment of the present invention is an epoxy resin 40 to 80 parts by weight, AHHFP (2,2'-bis (3-amino-4-hydroxyphenyl) hexafluoropropane) 10 to 50 parts by weight, 30 to 60 parts by weight of an acrylate resin, and 0.1 to 5 parts by weight of a photoinitiator.

Epoxy resins include bisphenol A type epoxy, bisphenol F type epoxy, novolac type epoxy, flame retardant epoxy, cycloaliphatic epoxy, rubber It is any one selected from the group consisting of bber Modified Epoxy, Aliphatic Polyglycidyl Type Epoxy, and Glycidyl Amine Type Epoxy.

Acrylate resins include Acrylic Acid, Methyl Methacrylate, 2-Hydoxyethyl Acrylate, and 1,6-Hexanediol Diacrylate. ), trimethylolpropane triacrylate, and dipentaerythritol hexaacrylate.

In addition, the hard coating film according to an embodiment of the present invention includes a base film and a hard coating layer positioned on the base film. The hard coating layer is epoxy-based resin 40 to 80 parts by weight, AHHFP (2,2′-bis (3-amino-4-hydroxyphenyl) hexafluoropropane) 10 to 50 parts by weight, acrylate resin 30 to 60 parts by weight, and photoinitiator 0.1 It contains to 5 parts by weight.

The thickness of the hard coating layer is 5 to 150 μm.

In addition, a display device according to an embodiment of the present invention includes a display panel including a touch element, a reinforced substrate disposed on the display panel, and a hard coating layer disposed on the reinforced substrate. The hard coating layer is epoxy-based resin 40 to 80 parts by weight, AHHFP (2,2′-bis (3-amino-4-hydroxyphenyl) hexafluoropropane) 10 to 50 parts by weight, acrylate resin 30 to 60 parts by weight, and a photoinitiator 0.1 It contains to 5 parts by weight.

In the hard coating composition according to an embodiment of the present invention, AHHFP includes a CF3 group having low surface energy and excellent slip properties to enhance the durability of the hard coating layer against anti-fingerprint properties. In addition, due to the bulky structure of the CF3 group, the transmittance is improved, and thermal stability is excellent in terms of AHHFP characteristics, thereby improving the heat resistance of the hard coating layer. In addition, in the hard coating film and display device according to an embodiment of the present invention, by forming the hard coating layer as a single layer, it is possible to improve productivity and reduce manufacturing cost through process simplification.

1 and 2 are views showing a display device according to an exemplary embodiment of the present invention.
3 is a view showing a hard coating film according to an embodiment of the present invention.
Figure 4 is a graph showing the results of performing thermogravimetric analysis on the copolymer for a hard coating agent obtained in the synthesis example of the present invention.
5 is a graph showing the results of performing differential scanning calorimetry on the copolymer for a hard coating agent obtained in Synthesis Example of the present invention.
Figure 6 is a table showing the contact angle and image of the hard coating layer according to Examples and Comparative Examples of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are diagrams illustrating a display device according to an exemplary embodiment of the present invention.

1 and 2, a display device DD according to an exemplary embodiment of the present invention includes a display panel implementing an image. Display panels include Liquid Crystal Display (LCD), Field Emission Display (FED), Plasma Display Panel (PDP), Organic Light Emitting Display (OLED), It can be implemented based on a flat panel display device such as an electrophoresis display device (Electrophoresis, EPD). In the following embodiments, a liquid crystal display device is described as an example of a flat panel display, but it should be noted that the display device of the present invention is not limited to a liquid crystal display device.

In the display panel, a liquid crystal layer is formed between two substrates. The lower substrate GLS2 of the display panel includes a plurality of data lines, a plurality of gate lines crossing the data lines, a plurality of TFTs (Thin Film Transistor) formed at the intersections of the data lines and the gate lines, and liquid crystals. It includes a plurality of pixel electrodes for charging the data voltage to the cells, a storage capacitor connected to the pixel electrodes to maintain the voltage of the liquid crystal cell, and the like.

Pixels of the display panel are formed in a pixel area defined by data lines and gate lines and disposed in a matrix form. The liquid crystal cell of each of the pixels is driven by an electric field applied according to a voltage difference between the data voltage applied to the pixel electrode and the common voltage applied to the common electrode to adjust the transmission amount of incident light. The TFTs are turned on in response to a gate pulse from the gate line to supply a voltage from the data line to the pixel electrode of the liquid crystal cell.

The upper substrate GLS1 of the display panel may include a black matrix, a color filter, and the like. The lower substrate GLS2 of the display panel may be implemented in a color filter on TFT (COT) structure. In this case, the black matrix and the color filter may be formed on the lower substrate GLS2 of the display panel. Polarizing plates POL1 and POL2 are attached to each of the upper substrate GLS1 and the lower substrate GLS2 of the display panel, and an alignment layer for setting the pretilt angle of the liquid crystal is formed on an inner surface in contact with the liquid crystal. A column spacer for maintaining a cell gap of a liquid crystal cell is formed between the upper substrate GLS1 and the lower substrate GLS2 of the display panel.

Although not shown, a backlight unit may be disposed under the rear surface of the display panel. The backlight unit is implemented as an edge type or direct type backlight unit and irradiates light to the display panel DIS. The display panel DIS may be implemented in any known liquid crystal mode such as a twisted nematic (TN) mode, a vertical alignment (VA) mode, an in plane switching (IPS) mode, and a fringe field switching (FFS) mode.

A touch element TSP may be disposed on the upper surface of the display panel. The touch device TSP may be bonded to the upper polarizing plate POL1 of the display panel as shown in FIG. 1, or formed between the upper polarizing plate POL1 and the upper substrate GLS1 as shown in FIG. 2. Touch elements may be classified into an add-on type, an on-cell type, and an in-cell type according to their structure. In the upper plate attachment type, after separately manufacturing the display panel and the touch panel as shown in FIG. 1, the touch element TSP is attached to the upper substrate GLS1 of the display panel. The integrated upper plate type is a method of directly forming a touch element on the surface of the upper substrate GLS1 of the display panel as shown in FIG. 2. Although not shown, the panel-embedded type is a method of directly forming elements constituting a touch element inside a display panel. In the present invention, any of the above-described top plate attachment type, top plate integral type, and panel built-in type can be used.

The touch element TSP includes Tx lines to which a touch driving signal is applied, Rx lines crossing the Tx lines to sense a touch, and sensor nodes formed at intersections thereof. The touch element TSP detects a change in capacitance formed between the Tx lines and the Rx lines by the user's body when the user touches it to determine the touch position.

Meanwhile, the reinforced substrate SUB is positioned on the display panel. The reinforced substrate SUB protects the internal display panel from the outside, and is made of glass or plastic having excellent durability. The reinforced substrate (SUB) needs to prevent adhesion from fingerprints or external contaminants, and abrasion resistance properties are required to prevent external scratches including fingernails and touch pens. To this end, the present invention includes a hard coating layer using a hard coating composition.

Hereinafter, a hard coating composition for preparing the above-described hard coating layer, and a hard coating film having a hard coating layer formed thereon will be described.

The hard coating composition according to an embodiment of the present invention is to compensate for the disadvantages of the design and characteristics of the conventional hard coating layer, and includes an epoxy-based resin, AHHFP, and an acrylate-based resin. In particular, AHHFP enhances the durability of the hard coating layer against anti-fingerprints by including CF3 groups having low surface energy and excellent slip properties. In addition, due to the bulky CF3 group, transmittance is improved, and thermal stability is excellent in terms of AHHFP characteristics, thereby improving the heat resistance of the hard coating layer. Therefore, the hard coating composition of the present invention comprises 40 to 80 parts by weight of an epoxy resin, 10 to 50 parts by weight of AHHFP (2,2′-bis (3-amino-4-hydroxyphenyl) hexafluoropropane), and 30 to 60 parts by weight of an acrylate resin. It includes parts by weight, and 0.1 to 5 parts by weight of a photoinitiator.

The epoxy-based resin imparts coating properties and adhesion of a hard coating agent, bisphenol A type epoxy (DGEBA Type Epoxy), bisphenol F type epoxy (DGEBF Type Epoxy), novolac epoxy (Novolac Type Epoxy), flame retardant epoxy ( Brominated Epoxy), Cycloaliphatic Epoxy, Rubber Modified Epoxy, Aliphatic Polyglycidyl Type Epoxy, and Glycidyl Amine Type Epoxy At least one is selected from.

The epoxy resin is included in an amount of 40 to 80 parts by weight based on 100 parts by weight of the total hard coating composition. Here, if the content of the epoxy resin is less than 40 parts by weight based on 100 parts by weight of the hard coating composition, the adhesiveness of the composition is lowered, and if the content of the epoxy resin is more than 80 parts by weight based on 100 parts by weight of the hard coating composition, adhesion The coating property is deteriorated because the property is too high. Therefore, the epoxy resin is included in an amount of 40 to 80 parts by weight based on 100 parts by weight of the total hard coating composition.

The AHHFP is to enhance the durability of the hard coating agent against anti-fingerprint and improve transmittance and heat resistance, and has the following structure.

The AHHFP is included in an amount of 10 to 50 parts by weight based on 100 parts by weight of the total hard coating composition. Here, if the content of AHHFP is less than 10 parts by weight based on 100 parts by weight of the hard coating composition, fingerprint resistance is not well implemented, and if the AHHFP content is more than 50 parts by weight based on 100 parts by weight of the hard coating composition, brittle (brittle ) And high viscosity, making it difficult to apply. Therefore, AHHFP is included in an amount of 10 to 50 parts by weight based on 100 parts by weight of the total hard coating composition.

The acrylate-based resin contributes to the visibility and coatability of the hard coating agent, and 2-butoxyethyl acrylate, 2-butoxyethyl methacrylate, 2-ethoxyethyl acrylate, 2-ethoxyethyl methacrylate , 2-ethyl-2-adamantyl acrylate, 2-ethyl-2-adamantyl methacrylate, 2-hydroxyethyl acrylate, 2-methyl-2-adamantyl acrylate, 2-methyl- 2-adamantyl methacrylate, benzyl acrylate, cyclohexyl acrylate, di(ethylene glycol) ethyl ether acrylate, di(ethylene glycol) ethyl ether methacrylate, di(ethylene glycol) methyl ether methacrylate, Dicyclopentanyl acrylate, epoxy acrylate, ethylene glycol methyl ether acrylate, ethylene glycol phenyl ether acrylate, hydroxypropyl acrylate, isobornyl acrylate, methyl adamentyl acrylate, neopentyl glycol benzoate acrylate, 2 -Hydroxyethyl methacrylate, adamantyl methacrylate, allyl methacrylate, benzyl methacrylate, cyclohexyl methacrylate, dicyclopentanyl methacrylate, epoxy cyclohexylmethyl methacrylate, ethylene glycol phenyl ether Methacrylate, hydroxybutyl methacrylate, hydroxypropyl methacrylate, isobornyl methacrylate, glycidyl methacrylate, methyladamentyl methacrylate, methyl methacrylate, methylglycidyl methacrylate ; Trimethylolpropane triacrylate; Isobutyl acrylate, tert-butyl acrylate, lauryl acrylate, alkyl acrylate, 2-hydroxy acrylate, trimethoxybutyl acrylate, ethyl carbitol acrylate, phenoxy ethyl acrylate, 4-hydroxy Butyl acrylate, 2-hydroxy-3-phenoxypropyl acrylate, and methacrylates thereof; 3-fluoroethyl acrylate, 4-fluoropropyl acrylate, and methacrylates thereof; At least one type is selected from the group consisting of triethylsiloxane ethyl acrylate and methacrylates thereof.

The acrylate-based resin is included in an amount of 30 to 60 parts by weight based on 100 parts by weight of the total hard coating composition. Here, if the content of the acrylate-based resin is less than 30 parts by weight based on 100 parts by weight of the hard coating composition, photocuring is not well performed, and the content of the acrylate-based resin is more than 60 parts by weight based on 100 parts by weight of the hard coating composition. Properties such as anti-fingerprint and high hardness are not implemented. Accordingly, the acrylate-based resin is included in an amount of 30 to 60 parts by weight based on 100 parts by weight of the total hard coating composition.

The photoinitiator may affect the visibility and curing degree of the hard coating agent, and specific examples are 2,2'-diethoxyacetophenone, 2,2'-dibutoxyacetophenone, 2-hydroxy-2-methylproriophenone , pt-tyltrichloroacetophenone, pt-butyldichloroacetophenone, benzophenone, 4-chloroacetophenone, 4,4'-dimethylaminobenzophenone, 4,4'-dichlorobenzophenone, 3,3'-dimethyl -2-methoxybenzophenone, 2,2'-dichloro-4-phenoxyacetophenone, 2-methyl-1-(4-(methylthio)phenyl)-2-morpholinopropan-1-one, 2 -Acetophenone compounds such as benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butan-1-one, benzophenone, benzoyl benzoic acid, methyl benzoyl benzoate, 4-phenylbenzophenone, hydroxy benzophenone , Acrylated benzophenone, 4,4'-bis (dimethyl amino) benzophenone, 4,4'-bis (diethyl amino) Benzophenone compounds such as benzophenone Thioxanthone, 2-Crol thioxanthone, 2- Thioxanthone compounds such as methyl thioxanthone, isopropyl thioxanthone, 2,4-diethyl thioxanthone, 2,4-diisopropyl thioxanthone, and 2-chloro thioxanthone benzoin, benzoin Benzoin compounds such as methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, and benzyl dimethyl ketal 2,4,6,-trichloro s-triazine, 2-phenyl 4,6-bis (Trichloromethyl)-s-tria, 2-(3',4'-dimethoxy styryl)-4,6-bis(trichloromethyl)-s-triazine, 2-(4'-methoxy naphe Tyl)-4,6-bis(trichloromethyl)-s-triazine, 2-(p-methoxyphenyl)-4,6-bis(trichloromethyl)-s-triazine, 2-(p- Triazine, 2-phenyl 4,6-bis (trichloromethyl)-s-triazine, bis (trichloromethyl)-6-styryl s -Triazine, 2-(naphtho 1-yl)-4,6-bis(trichloromethyl)-s-triazine, 2-(4-methoxy naphtho 1-yl)-4,6-bis( Trichloromethyl)-s-triazine, 2-4-trichloromethyl(piperonyl)-6-triazine, 2-4-trichloromethyl(4'-methoxys) At least one selected from among triazine-based compounds such as thyryl)-6-triazine may be used.

The photoinitiator is included in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the total hard coating composition. Here, if the content of the photoinitiator is less than 0.1 parts by weight based on 100 parts by weight of the hard coating composition, the composition is not cured, and if the content of the photoinitiator is more than 5 parts by weight based on 100 parts by weight of the hard coating composition, the physical properties of the composition are deteriorated. Accordingly, the photoinitiator is included in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the total hard coating composition.

As described above, the hard coating composition according to an embodiment of the present invention comprises 40 to 80 parts by weight of an epoxy resin, 10 to 50 parts by weight of AHHFP (2,2′-bis(3-amino-4-hydroxyphenyl) hexafluoropropane), 30 to 60 parts by weight of an acrylate-based resin, and 0.1 to 5 parts by weight of a photoinitiator.

The above-described hard coating composition of the present invention includes a step of polymerizing an epoxy-based resin and AHHFP, a step of polymerizing the polymer and an acrylate-based resin, and adding a photoinitiator. A more detailed method of preparing the hard coating composition will be described in Synthesis Examples to be described later.

3 is a view showing a hard coating film according to an embodiment of the present invention. Referring to FIG. 3, description will be given of manufacturing a hard coating film using the prepared hard coating composition.

Referring to FIG. 3, a hard coating film 100 according to an embodiment of the present invention includes a base film 110 and a hard coating layer 120 positioned on the base film 110.

The base film 110 is selected from the group consisting of polyethylene terephthalate (PET), polycarbonate (PC), and polymethyl methacrylate (PMMA). The hard coating layer 120 coated on the base film 110 is coated by a solution process such as spin coating, slit coating, and screen printing. The hard coating layer 120 has a thickness of 5 to 150 μm. Here, when the thickness of the hard coating layer 120 is less than 5 μm, the thickness of the coating layer is formed unevenly, and when the thickness of the hard coating layer 120 is more than 150 μm, the transmittance decreases.

In FIG. 3, the hard coating film 100 has been described by showing that the hard coating layer 120 is formed on one surface of the base film 110, but unlike this, the hard coating layer 120 is respectively formed on the upper and lower surfaces of the base film 110. This may be provided. The hard coating film 100 may be attached to the reinforced substrate. In addition, the hard coating layer may not be formed in the form of a hard coating film, but may be formed by directly coating the reinforced substrate with a hard coating composition.

As described above, in the hard coating composition according to an embodiment of the present invention, AHHFP includes a CF3 group having low surface energy and excellent slip properties to enhance the durability of the hard coating layer against anti-fingerprint properties. In addition, due to the bulky CF3 group, transmittance is improved, and thermal stability is excellent in terms of AHHFP characteristics, thereby improving the heat resistance of the hard coating layer. In addition, in the hard coating film and display device according to an embodiment of the present invention, by forming the hard coating layer as a single layer, it is possible to improve productivity and reduce manufacturing cost through process simplification.

Hereinafter, preferred synthesis examples and examples are disclosed to aid in understanding the present invention. However, the following Synthesis Examples and Examples are for illustrative purposes only, and the present invention is not limited to the following Synthesis Examples and Examples.

<Synthesis Example>

hard For coating agent Synthesis of Copolymer

Poly[(Phenyl Glycidyl ether)-co-formaldehyde]) (0.5 mol), AHHFP (0.12 mol) and catalyst DBTDL (0.5 g) were added to a round flask. Then, the mixture was reacted at 60° C. for 1 hour in a nitrogen atmosphere and reacted at 80° C. for 2 hours.

To the reaction product, acrylic acid (0.5 mol) was added and reacted at 60° C. for 1 hour. 3wt% of the photoinitiator (184) was added and reacted for 1 hour to obtain a final product.

Thermogravimetric analysis (TGA) was performed on the copolymer for a hard coating agent obtained in Synthesis Example, and the results are shown in FIG. 4, and differential scanning calorimetry (DSC) was performed to obtain the results. It is shown in Figure 5.

Referring to FIG. 4, as a result of the TGA of the copolymer for a hard coating agent of the present invention, it was confirmed that it maintained a thermally stable state until the molecular weight decreased in the vicinity of 259.21°C. In addition, as a result of DSC measurement of the copolymer for a hard coating agent of the present invention, it was confirmed that it maintained a thermally stable state until decomposition in the vicinity of 200°C. That is, it was confirmed that the copolymer for a hard coating agent of the present invention exhibits heat resistance of at least 200°C.

Hereinafter, an embodiment in which a hard coating composition is prepared by mixing a photoinitiator with the copolymer prepared in the above-described Synthesis Example to determine the characteristics of the hard coating layer will be disclosed.

<Example>

A hard coating composition was prepared by mixing the copolymer photoinitiator prepared in Synthesis Example described above, and then coated on a base film to a thickness of 100 μm to prepare a hard coating layer.

<Comparative Example>

A hard coating layer was prepared by coating a urethane acrylate-based hard coating composition to a thickness of 100 μm on the base film.

The transmittance, haze, and yellowness (YI) of the hard coating layer prepared according to the above-described Examples and Comparative Examples were measured and shown in Table 1 below.

Comparative example Example Transmittance (%) 90 92.58 Haze (%) - 0.21 Yellowness - 0.74

Referring to Table 1, the transmittance of the Example of the present invention including AHHFP having a CF3 group was improved by 2.58% compared to the transmittance of the Comparative Example. In addition, it can be seen that the hard coating layer of the example exhibited 0.21% haze and a yellowness of 0.74, indicating excellent characteristics of the hard coating layer.

In addition, the contact angle and the image of the hard coating layer according to the above-described Examples and Comparative Examples are shown in FIG. 6. 6, the contact angle of the hard coating layer according to the comparative example was found to be 67 degrees. _{On the other hand, the contact angle of water (H 2} O) of the hard coating layer according to the embodiment of the present invention is 109 degrees, and when the eraser test is performed under conditions of 1500 round trips (40 times per minute) with a load of 500 g, the contact angle is 102 degrees. I got it. That is, it can be seen that the contact angle of the hard coating layer with respect to water according to the embodiment of the present invention is maintained at 100 degrees or more even after the eraser test, and thus durability is excellent.

As described above, in the hard coating composition according to an embodiment of the present invention, AHHFP includes a CF3 group having low surface energy and excellent slip properties to enhance the durability of the hard coating layer against anti-fingerprint properties. In addition, due to the bulky CF3 group, transmittance is improved, and thermal stability is excellent in terms of AHHFP characteristics, thereby improving the heat resistance of the hard coating layer. In addition, in the hard coating film and display device according to an embodiment of the present invention, by forming the hard coating layer as a single layer, it is possible to improve productivity and reduce manufacturing cost through process simplification.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical configuration of the present invention described above is in other specific forms without changing the technical spirit or essential features of the present invention by those skilled in the art. It will be appreciated that it can be implemented. Therefore, the embodiments described above are illustrative in all respects and should be understood as non-limiting. In addition, the scope of the present invention is indicated by the claims to be described later rather than the detailed description. In addition, all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention.

100: hard coating film 110: base film
120: hard coating layer

Claims (6)

40 to 80 parts by weight of an epoxy resin;
10 to 50 parts by weight of AHHFP (2,2′-bis(3-amino-4-hydroxyphenyl) hexafluoropropane);
30 to 60 parts by weight of an acrylate resin; And
A hard coating composition comprising 0.1 to 5 parts by weight of a photoinitiator.
The method of claim 1,
The epoxy resin is bisphenol A type epoxy (DGEBA Type Epoxy), bisphenol F type epoxy (DGEBF Type Epoxy), novolac type epoxy (Novolac Type Epoxy), flame retardant epoxy (Brominated Epoxy), Cycloaliphatic Epoxy (Cycloaliphatic Epoxy), Hard coating composition, characterized in that any one selected from the group consisting of rubber-type epoxy (bber Modified Epoxy), aliphatic polyglycidyl type epoxy (Aliphatic Polyglycidyl Type Epoxy), and glycidyl amine epoxy (Glycidyl Amine Type Epoxy).
The method of claim 1,
The acrylate resin is acrylic acid (Acrylic Acid), methyl methacrylate (Methyl Methacrylate), 2-hydroxyethyl acrylate (2-Hydoxyethyl Acrylate), 1,6-hexanediol diacrylate (1,6-Hexanediol Diacrylate), trimethylolpropane triacrylate, and dipentaerythritol hexaacrylate (Dipentaerythritol Hexaacrylate), characterized in that any one selected from the group consisting of a hard coating composition.
Base film; And
It includes a hard coating layer located on the base film,
The hard coating layer is 40 to 80 parts by weight of an epoxy resin, 10 to 50 parts by weight of AHHFP (2,2′-bis (3-amino-4-hydroxyphenyl) hexafluoropropane), 30 to 60 parts by weight of an acrylate resin, and a photoinitiator Hard coating film comprising 0.1 to 5 parts by weight.
The method of claim 4,
Hard coating film, characterized in that the thickness of the hard coating layer is 5 to 150㎛.
A display panel including a touch element;
A reinforced substrate positioned on the display panel; And
It includes a hard coating layer located on the reinforced substrate,
The hard coating layer is 40 to 80 parts by weight of an epoxy resin, 10 to 50 parts by weight of AHHFP (2,2′-bis (3-amino-4-hydroxyphenyl) hexafluoropropane), 30 to 60 parts by weight of an acrylate resin, and a photoinitiator A display device comprising 0.1 to 5 parts by weight.

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