Coating composition and coating film

Abstract

To provide a coating composition used for producing a coating film having superior abrasion resistance and superior scratch resistance.SOLUTION: A coating composition comprises a silane compound and a polymerization curing aid, wherein the silane compound comprises a first silane compound represented by the following formula 1, a second silane compound represented by the following formula 2, and a third silane compound represented by the following formula 3, and wherein the polymerization curing aid comprises a diol and water. [Formula 1] R11-Si(OR12)(OR13)(OR14). [Formula 2] CmF2m+1-R21-Si(OR22)(OR23)(OR24). [Formula 3] Si(OR3)4.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a coating film, a coating composition, and a display device.

Background Art

[0002] As a core material in the fields of optics and flexible displays, the importance of the light-transmissive film is increasing. The light-transmissive film is used as a material to replace glass in the display field, especially because it has light weight, easy processability, and flexibility. A general light-transmissive film is known to have lower surface hardness and abrasion resistance than glass. Therefore, in order to apply the light-transmissive film to the display field, research is being conducted to improve the abrasion resistance of the light-transmissive film.

[0003] As a method for improving the mechanical or optical properties of the light-transmissive film, there is a method of disposing a coating layer on the surface of the light-transmissive film. The light-transmissive film with the coating layer disposed thereon is also referred to as a coating film.

[0004] On the other hand, a method of inputting information using a touch screen has recently been widely applied to electronic devices such as portable personal digital assistants (PDAs). However, when information is directly input to the surface of an electronic device or a display device using a hand or a pen, the surface of the electronic device or the display device may be contaminated by contact with the hand or the pen.

[0005] Therefore, while having excellent abrasion resistance, it is also resistant to contamination caused by touch of a hand or a pen. A light-transmissive film or a coating film having excellent resistance or excellent contamination removal characteristics is required. is required.

Summary of the Invention

Problems to be Solved by the Invention

[0006] One embodiment of the present invention aims to provide a coating film having excellent abrasion resistance and excellent scratch resistance. aims to provide a coating film having excellent abrasion resistance and excellent scratch resistance.

[0007] One embodiment of the present invention aims to provide a coating film having excellent anti-fouling properties. aims to provide a coating film having excellent anti-fouling properties. One embodiment of the present invention has a large water contact angle and can maintain a large water contact angle even after scratching, and aims to provide a coating film having excellent stain resistance. contact angle even after scratching, and aims to provide a coating film having excellent stain resistance.

[0008] Another embodiment of the present invention aims to provide a coating composition used for producing a coating film having the above characteristics. aims to provide a coating composition used for producing a coating film having the above characteristics.

[0009] Another embodiment of the present invention aims to provide a display device including the above coating film. aims to provide a display device including the above coating film.

Means for Solving the Problems

[0010] One embodiment of the present invention for solving the above problems includes a base film and a coating layer on the base film, and the coating layer provides a coating film having a water contact angle of 100 degrees or more and a water contact angle after scratching of 98 degrees or more. or more.

[0011] The difference between the water contact angle and the water contact angle after scratching may be 10 degrees or less.

[0012] The coating layer may have a water contact angle of 100 to 120 degrees and a water contact angle after scribing of 98 to 110 degrees.

[0013] The coating layer may have two or fewer scratch counts.

[0014] The coating layer may have a water contact angle of 95 degrees or more after eraser wear.

[0015] The difference between the water contact angle and the water contact angle after eraser wear may be 10 degrees or less.

[0016] The coating layer may have a water contact angle of 95 to 110 degrees after eraser wear.

[0017] Based on a coating layer thickness of 10 μm, it may have a curl of 2 mm or less.

[0018] Based on a coating layer thickness of 10 μm, it may have a crack point radius of 1 mm or less. dius)

[0019] Another embodiment of the present invention provides a coating composition containing a silane compound and a polymerization curing aid, wherein the silane compound includes a first silane compound represented by the following Chemical Formula 1, a second silane compound represented by the following Chemical Formula 2, and a third silane compound represented by the following Chemical Formula 3, and the polymerization curing aid includes a diol (diol

[0020] [Chemical Formula 1] JPEG2025098074000001.jpg3543

[0021] [Chemical Formula 2] JPEG2025098074000002.jpg3569

[0022] ​ [Chemical Formula 3] Si(OR 3 )4

[0023] R 11 is a substituted or unsubstituted C2-C5 unsaturated hydrocarbon group, and R 12 , R 13 and R 14 are each independently a C1-C5 alkyl group, R 21 is a single bond or a C1-C4 alkylene group, and R 22 , R 23 and R 24 are each independently a C1-C5 alkyl group, m is an integer from 3 to 10 3 is a C1-C4 alkyl group.

[0024] The molar ratio of the silane compound to the polymerization curing aid can be in the range of 1:1.2 to 1.8.

[0025] Based on the total number of moles of the silane compound, it may contain 80 to 90 mol% of the first silane compound, 1 to 5 mol% of the second silane compound and 7 to 15 mol% of the third silane compound.

[0026] The first silane compound may contain vinyltrimethoxysilane represented by the following Chemical Formula 4 (Vinyl tr imethoxy silane).

[0027] [Chemical Formula 4] JPEG2025098074000003.jpg3449

[0028] The second silane compound is 1H,1H,2H,2H-perfluorooctyltriethoxysilane (1H, 1H,2H,2H-Perfluoro-octyltriethoxysilane), 1H,1H,2H,2H-perfluorooctyltri​ Methoxysilane (1H,1H,2H,2H-Perfluoro-octyltrimethoxysilane), 1H,1H,2H,2H-per fluorodecyltrimethoxysilane (1H,1H,2H,2H-Perfluoro-decyltrimethoxysilane) and at least one selected from 1H,1H,2H,2H-perfluorodecyltriethoxysilane (1H,1H,2H,2H-Perfluoro-decy ltriethoxysilane) may be included.

[0029] The third silane compound may include at least one of tetraethyl orthosilicate (TEO S) and tetramethyl orthosilicate (TMOS). It may include at least one of them.

[0030] The diol may include at least one of ethylene glycol, 1,3-propanediol (1,3-propanediol) and 1,4-butanediol (1,4-butanediol). It may include at least one of them.

[0031] The coating composition may further include a base catalyst.

[0032] The coating composition may include 0.05 to 0 .1 part by weight of the base catalyst with respect to 100 parts by weight of the total silane compound.

[0033] Another embodiment of the present invention provides a coated film including a base film and a coating layer formed by the coating composition on the base film. It includes a coating film including a coating layer formed by the coating composition on the base film.

[0034] Another embodiment of the present invention provides a display device including a display panel and the coating film disposed on the display panel.

Advantages of the Invention

[0035] The coating layer according to an embodiment of the present invention has a perfluoro group and can have excellent abrasion resistance, scratch resistance, and stain resistance.

[0036] The coating film according to an embodiment of the present invention having the coating layer as described above can have a large water contact angle and a large water contact angle after scratching. Therefore, the coating film according to an embodiment of the present invention can have excellent sliding properties, excellent anti-fouling properties, and excellent stain removal properties.

[0037] According to an embodiment of the present invention, the coating layer formed by the coating composition containing the polyfunctional silane compound can have excellent abrasion resistance and scratch resistance. The coating film according to an embodiment of the present invention including such a coating layer can have excellent abrasion resistance and scratch resistance. Further, the coating layer of the coating film according to an embodiment of the present invention can have excellent flexibility.

[0038] The display device in which the coating film according to an embodiment of the present invention is attached to the display surface of the display panel can have excellent surface anti-fouling properties, excellent surface stain removal properties, excellent abrasion resistance and scratch resistance, and excellent flexibility.

Brief Description of the Drawings

[0039] ​​​​​​​​​​

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0040] Hereinafter, the present invention will be described in detail based on examples. The examples described below are presented for illustrative purposes to assist in a clear understanding of the present invention and do not limit the scope of the present invention. Those presented for illustrative purposes to assist in a clear understanding of the present invention and do not limit the scope of the present invention. It does not limit the scope of the present invention.

[0041] When terms such as "including", "having", "performed", etc. mentioned in this specification are used, other parts can be added unless the expression "only" is used. When a component is expressed in the singular, it includes a plurality unless otherwise explicitly stated. Also, when interpreting a component, it is interpreted to include the range of error even without separate explicit description. When terms such as "including", "having", "performed", etc. mentioned in this specification are used, other parts can be added unless the expression "only" is used. When a component is expressed in the singular, it includes a plurality unless otherwise explicitly stated. Also, when interpreting a component, it is interpreted to include the range of error even without separate explicit description. When a component is expressed in the singular, it includes a plurality unless otherwise explicitly stated. Also, when interpreting a component, it is interpreted to include the range of error even without separate explicit description. When interpreting a component, it is interpreted to include the range of error even without separate explicit description.

[0042] In the case of an explanation of the positional relationship, for example, when the positional relationship between two parts is explained by "on ~", "above ~ (upper part)", "below ~ (lower part)", "beside ~ (lateral part)", etc., unless the expressions "immediately" or "directly" are used, one or more other parts can be located between the two parts. In the case of an explanation of the positional relationship, for example, when the positional relationship between two parts is explained by "on ~", "above ~ (upper part)", "below ~ (lower part)", "beside ~ (lateral part)", etc., unless the expressions "immediately" or "directly" are used, one or more other parts can be located between the two parts. Unless the expressions "immediately" or "directly" are used, one or more other parts can be located between the two parts. One or more other parts can be located between the two parts.

[0043] In the case of the description regarding the relationship of time, for example, when the temporal front-back relationship is described by "after ~", "subsequent to ~", "next to ~", "before ~", etc., unless the expressions "immediately" or "directly" are used, it may include cases that are not continuous.

[0044] The first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are merely used to distinguish one component from another. Therefore, the first component mentioned below may also be the second component within the scope of the technical idea of the present invention.

[0045] The term "at least one" should be understood to include all combinations that can be presented from one or more related items. For example, the meaning of "at least one of the first item, the second item, and the third item" means not only each of the first item, the second item, or the third item alone, but also all combinations of two or more items that can be presented from among the first item, the second item, and the third item.

[0046] Each feature of various embodiments of the present invention can be partially or entirely combined or combined with each other, and various interlocks and drives are technically possible. Each embodiment may be implemented independently of each other, or may also be implemented together as a related relationship.

[0047] FIG. 1 is a schematic cross-sectional view of a coating film (100) according to an embodiment of the present invention.

[0048] Referring to FIG. 1, a coating film (100) according to an embodiment of the present invention includes a base film It includes a lumo (110) and a coating layer (120) on a base film (110).

[0049] A light-transmissive film can be used as the base film (110). The light-transmissive fi A polyimide-based (PI) film including a polyimide film and a polyamideimide film can be used as the lumo. However, an embodiment of the present invention is not limited to this, and a polycarbonate film (PC), a polyacrylic film, a polyethylene tereph thalate film, a cellulose film, etc. can also be used as the base film (110).

[0050] According to an embodiment of the present invention, the coating layer (120) can be made of a coating composition containing a silane compound and a polymerization curing aid. The coating layer (120) made of a coating composition containing a silane compound and a polymerization curing aid may contain a siloxane resin.

[0051] According to an embodiment of the present invention, a perfluorosilane compound may be used to form the coating layer (120). The perfluoro group contained in the perfluorosilane compound (perfluoro group) may be located on the upper part of the coating layer. As a result, the perfluoro group (perfluoro group) can affect the physical properties of the surface of the coating layer (120).

[0052] According to an embodiment of the present invention, the coating layer (120) may have excellent abrasion resistance, scratch resistance, stain resistance, and flexibility. As a result, including the coating layer (120) ​​​​​​​The non-coated film (100) can have excellent abrasion resistance, scratch resistance, stain resistance, and flexibility.

[0053] According to an embodiment of the present invention, the coating layer (120) can have a thickness of 5 to 50 μm. When the thickness of the coating layer (120) is less than 5 μm, the characteristics of abrasion resistance, scratch resistance, and stain resistance of the coated film (100) by the coating layer (120) may not be fully exhibited. When the thickness of the coating layer (120) exceeds 50 μm, the thickness of the coated film (100) increases, and the flexibility of the coated film (100) may decrease.

[0054] According to an embodiment of the present invention, the coated film (100) may have a water contact angle of 100 degrees or more and a water contact angle after scratching of 98 degrees or more. More specifically, the coating layer (120) of the coated film (100) according to an embodiment of the present invention may have a water contact angle of 100 degrees or more and a water contact angle after scratching of 98 degrees or more.

[0055] According to an embodiment of the present invention, the water contact angle is defined as the angle between the surface of the coating layer (120) and the boundary of the water droplet (H2O) measured after dropping a 5 μL water droplet (H2O) onto the coating layer (120).

[0056] Figure 2 is a schematic cross-sectional view for explaining the measurement of the water contact angle.

[0057] According to an embodiment of the present invention, using the MSA (Mobile Surface Analyzer) model of KRUSS, after dropping a 5 μL water droplet (WD) onto the coating layer (120) as shown in Figure 2, the coating ​​​​​​​​​​​​ By measuring the angle (θ) between the surface of the coating layer (120) and the boundary of the water droplet, the water contact angle can be determined. Specifically, after dropping a 5 μL water droplet (WD) onto the surface of the coating layer (120) at a rate of 2.7 μL / sec, the angle (θ) between the surface of the coating layer (120) and the boundary of the water droplet (WD) is measured 7 times every 0.2 seconds, and by repeating such measurements 5 times, the average value can be taken as the water contact angle.

[0058] The coating layer (120) of the coating film (100) according to an embodiment of the present invention has a water contact angle of 10 degrees or more. The coating layer (120 ) having a large water contact angle of 100 degrees or more can have excellent sliding properties. When the coating layer (120) has excellent sliding properties, it is difficult for contaminants to adhere or deposit on the coating layer (120), so the coating layer (120) can have excellent anti-fouling properties. Also, when the coating layer (120) has excellent sliding properties, contaminants adhering or deposited on the coating layer (120 can be easily removed. As a result, the coating layer (120) can have excellent contaminant removal properties.

[0059] The coating layer (120) of the coating film (100) according to an embodiment of the present invention has a water contact angle after scratching of 98 degrees or more.

[0060] The water contact angle after scratching is obtained by cutting the coating film (100) into a size of 100 mm × 50 mm to produce a sample of the coating film, and using an adhesive tape (3M) to fix the sample of the coating film to a flat surface with the coating layer (120) facing upward and then scratching the coating layer (120) with a steel wool (#0000) under a load of 100 g for 10 cycles, and then measuring the water contact angle of the scratched coating layer (120) in the same manner as described above and fixing the sample of the coating film to a flat surface using an adhesive tape (3M) with the coating layer (120) facing upward After fixing, using a 20 mm × 20 mm stainless steel (SUS ) jig wrapped with non-woven fabric of #0000 (LIBERON), the surface of the coating layer (120) of the coating film sample is reciprocated 10,000 times at a load of 0.5 kgf and a speed of 45 RPM and then measured water contact angle is used.

[0061] In summary, the water contact angle after scratching means the water contact angle measured after the surface of the coating layer (120) of the coating film (100) has undergone a scratch-induced process. To measure the water contact angle after scratching, the MSA (Mobile Surface Analyzer) model of KRUSS can be used.

[0062] The coating layer (120) of the coating film (100) according to an embodiment of the present invention has a water contact angle after scratching of 98 degrees or more, so that the coating layer (120) surface can have excellent sliding properties even after being exposed to a scratch environment. Therefore, even if the coating layer (120) is exposed to a scratch environment during the use process of the coating film (100), the coating film (100) can have excellent anti-pollution and pollution removal properties.

[0063] According to an embodiment of the present invention, the difference between the water contact angle of the coating layer (120) and the water contact angle after scratching can be 10 degrees or less.

[0064] When the difference between the water contact angle of the coating layer (120) and the water contact angle after scratching is not large, during the use process of the coating film (100), the coating layer (120) is in a scratch environment ​​​​​​​​​​​Even when exposed to the environment, it means that the water contact angle of the coating layer (120) does not decrease significantly. Thus, the coating film (100) according to an embodiment of the present invention is not significantly damaged in a scratch environment and has excellent resistance in a scratch environment. Therefore, it can be said that the coating film (100) according to an embodiment of the present invention has excellent scratch resistance.

[0065] According to an embodiment of the present invention, the coating layer (120) may have a water contact angle of 100 degrees to 120 degrees , and a water contact angle after scratching of 98 degrees to 110 degrees. Alternatively, according to an embodiment of the present invention, the coating layer (120) may have a water contact angle of 105 degrees to 120 degrees and a water contact angle after scratching of 100 degrees to 110 degrees. According to an embodiment of the present invention, the coating layer (120) may also have a water contact angle of 105 degrees to 115 degrees.

[0066] The coating layer (120) of the coating film (100) according to an embodiment of the present invention may have two or less numbers of scratches.

[0067] According to an embodiment of the present invention, the number of scratches is obtained by cutting the coating film (100) into a size of 100 mm × 50 mm to produce a sample of the coating film, and using an adhesive tape (3M) to fix the sample of the coating film flat so that the coating layer (120) faces upward. After that, a 20 mm × 20 mm size of a stainless steel (SUS) jig wrapped with a non-woven fabric of #0000 (LIBERON) is used to apply a load of 0.5 kgf and a speed of 45 RPM for 10,000 times ( of which After reciprocating the surface of the coating layer (120) of the coating film sample between means the number of scratches observed with the naked eye.

[0068] According to an embodiment of the present invention, the coating layer (120) of the coating film (100) may have one or fewer number of scratches, or may have no scratches.

[0069] According to an embodiment of the present invention, the coating film (100) has very few or no scratches even after going through the scratch induction process. Therefore, the coating film (100) according to an embodiment of the present invention has excellent scratch resistance.

[0070] When the coating film (100) according to an embodiment of the present invention is used as a cover window of a display device the coating film (100) is exposed to a scratch environment. Since the coating film (100) according to an embodiment of the present invention has excellent scratch resistance even when the coating film (100) is used as a cover window of a display device it is possible that no scratches or very few scratches occur.

[0071] According to an embodiment of the present invention, the coating layer (120) of the coating film (100) may have a water contact angle after eraser abrasion of 95 degrees or more.

[0072] The water contact angle after eraser abrasion is obtained by cutting the coating film (100) into a size of 200 mm × 50 mm to produce a coating film sample, with the coating layer (120) facing upward and Orient it and fix a sample of the coating film to a flat surface using an adhesive tape (3M). After that, fix a "Minoan" eraser (eraser for abrasion test; Minoan abrasion test erasers) to a jig and reciprocate the surface of the coating layer (120) of the sample of the coating film 1,000 times at a load of 0.5 kgf and a speed of 45 RPM (for the duration of) and then measure the water contact angle. To measure the water contact angle, the MSA (Mobile Surface Analyze r) model of KRUSS can be used.

[0073] The coating layer (120) of the coating film (100) according to an embodiment of the present invention has a water contact angle after eraser abrasion of 95 degrees or more. Therefore, even when the surface of the coating layer (120) is exposed to an environment where it can be abraded, it can be said that the damage to the coating layer (120) is not significant. Thus, the coating film (100) according to an embodiment of the present invention can be said to have excellent abrasion resistance characteristics.

[0074] According to an embodiment of the present invention, the difference between the water contact angle of the coating layer (120) and the water contact angle after the eraser abrasion can be 10 degrees or less.

[0075] When the difference between the water contact angle of the coating layer (120) and the water contact angle after eraser abrasion is not large it means that even when the coating layer (120) is exposed to an environment where it can be abraded during the use process of the coating film (100), the water contact angle of the coating layer (120) does not decrease significantly. Thus, the coating film (100) according to an embodiment of the present invention has an abrasion resistance environment ​​​Since the degree of damage in the environment is not large, it can be said to have excellent wear resistance. .

[0076] According to an embodiment of the present invention, the coating layer (120) of the coating film (100) may have a water contact angle after eraser rubber wear of 95 degrees to 110 degrees. Alternatively, according to an embodiment of the present invention , the coating layer (120) of the coating film (100) may have a water contact angle after eraser rubber wear of 95 degrees to 105 degrees.

[0077] According to an embodiment of the present invention, the coating film (100) may have a curl of 2 mm or less. For example, based on a thickness of 10 μm of the coating layer (120), the coating film (100) may have a curl of 2 mm or less.

[0078] Curl is defined as the distance at which the corners of a sample of the coating film (100), cut into a square with a size of 100 mm × 100 mm, are positioned on a flat glass substrate and then the corners of the sample of the coating film are separated from the bottom surface of the glass substrate . It is defined as.

[0079] FIG. 3 is a schematic cross-sectional view for explaining the measurement of curl. The distance indicated as "curl" in FIG. 3, specifically, the distance at which the corners of a sample of the coating film (100) are separated from the floor surface (upper surface) of the glass substrate (2 01) is referred to as the curl of the coating film (100). It can be said. In the manufacturing process of the coating film (100), in order to form the coating layer (120)

[0080] The coating composition can be cured, and curl may occur due to curing shrinkage. When curl occurs, it is difficult to perform post-processing due to the deformation of the appearance of the coating film (100). When curl occurs strongly, problems such as peeling of the coating layer (120) may occur.

[0081] According to an embodiment of the present invention, the coating composition may contain diol. The distance between molecules contained in the coating composition is maintained by the diol, and curl of the coating film (100) including the coating layer (120) can be prevented.

[0082] According to an embodiment of the present invention, the coating film (100) may have a curl of 1 mm or less, may have a curl of 0.5 mm or less, and may not have a curl distinguishable by the naked eye.

[0083] According to an embodiment of the present invention, the coating film (100) may have a crack point radius of 1 mm or less. For example, based on a thickness of 10 μm of the coating layer (120), it may have a crack point radius of 1 mm or less.

[0084] According to an embodiment of the present invention, the crack point radius is obtained by cutting the coating film (100) into a size of 20 mm × 100 mm to produce a sample of the coating film, and the coating layer (120) is on the outer side where the sample of the coating film is bent. After attaching a sample of the coating film to a Radius Bending Tester so that it faces the direction of as the radius of curvature is decreased, the sample of the coating film is bent, and it is defined as the radius of curvature at which cracks occur in the sample of the coating film. When the sample of the coating film is bent, it is defined as the radius of curvature at which cracks occur in the sample of the coating film. rack) occur.

[0085] FIG. 4 is a schematic diagram for explaining the measurement of the crack point radius. As shown in FIG. 4, when bending a sample of the coating film (100), the operation of bending is repeated while decreasing the radius of curvature of the bending point, and the radius of curvature at which cracks occur in the sample of the coating film (100) is defined as the crack point radius. When bending a sample of the coating film (100), the operation of bending is repeated while decreasing the radius of curvature of the bending point, and the radius of curvature at which cracks occur in the sample of the coating film (100) is defined as the crack point radius. (100) is defined as the crack point radius. ack point radius).

[0086] According to an embodiment of the present invention, since the coating film (100) has a very small crack point radius of 1 mm or less, it can be said that it has excellent bendability and flexibility. Since the coating film (100) has a very small crack point radius of 1 mm or less, it can be said that it has excellent bendability and flexibility. has.

[0087] In particular, according to an embodiment of the present invention, since the coating layer (120) is attached to a Radius Bending Tester so that the sample of the coating film faces the outer direction in which the sample of the coating film is bent, the coating layer (120) When the sample of the coating film is attached so as to face the inner direction in which the sample of the coating film is bent, the crack point radius (crac) is under more severe conditions. When the sample of the coating film is attached to a Radius Bending Tester so that the coating layer (120) faces the outer direction in which the sample of the coating film is bent, the coating layer (120) When the sample of the coating film is attached so as to face the inner direction in which the sample of the coating film is bent, the crack point radius (crac) is under more severe conditions. When the sample of the coating film is attached so that the coating layer (120) faces the inner direction in which the sample of the coating film is bent, the crack point radius (crac) is under more severe conditions. The k point radius is measured. Nevertheless, the coating film (100) according to an embodiment of the present invention has a very small crack point radius of 1 mm or less. Therefore, it can be said that the coating film (100) according to an embodiment of the present invention has excellent flexibility and flexibility. More specifically, the coating film (100) according to an embodiment of the present invention may have a crack point radius of 0.5 mm or less.

[0088]

[0089] One embodiment of the present invention provides a coating composition. The coating composition can be used for forming a coating layer (120) in the coating film (100).

[0090] According to one embodiment of the present invention, the coating composition includes a silane compound and a polymerization curing aid. The silane compound may include a first silane compound represented by the following Chemical Formula 1, a second silane compound represented by the following Chemical Formula 2, and a third silane compound represented by the following Chemical Formula 3. The polymerization curing aid may include diol and water (H2O).

[0091] [Chemical Formula 1] JPEG2025098074000004.jpg3543

[0092] In Chemical Formula 1, R 11 is a substituted or unsubstituted C2-C5 unsaturated hydrocarbon group, and R 12 , R 13 and R 14 are each independently a C1-C5 alkyl group. Here, the unsaturated hydrocarbon group and the a The Rukir groups can each be linear, branched, or alicyclic.

[0093] [Chemical formula 2] JPEG2025098074000005.jpg3569

[0094] In Chemical formula 2, R 21 is a single bond or a C1-C4 alkylene group, and R 22 , R 23 and R 24 are each independently a C1-C5 alkyl group. Here, the alkylene group and the alkyl group can each be linear, branched, or alicyclic. In Chemical formula 2, m is an integer from 3 to 10. respectively respectively is.

[0095] [Chemical formula 3] Si(OR 3 )4

[0096] In Chemical formula 3, R 3 is a C1 to C4 alkyl group. Here, the alkyl group can be linear or branched.

[0097] According to an embodiment of the present invention, siloxane can be formed by a silane compound. Specifically, the silane compound undergoes a polymerization and curing reaction. By the polymerization and curing of the silane compound, the coating composition can polymerize and cure to form a coating layer (120).

[0098] Since the first silane compound represented by Chemical formula 1 has an unsaturated hydrocarbon group, it can undergo a polymerization reaction. The first silane compound can play a central role in causing the coating composition to polymerize and cure as the main component of the silane compound. The polymerization and curing of the coating composition can be smoothly carried out by the first silane compound. can do. composition polymerizes and cures. The polymerization and curing of the compound can be smoothly carried out.

[0099] The first silane compound may include, for example, vinyltrimethoxysilane represented by the following chemical formula 4 (Viny l trimethoxy silane).

[0100] [Chemical formula 4] JPEG2025098074000006.jpg3449

[0101] The second silane compound is a silane compound having a perfluoro group . The perfluoro group contained in the second silane compound can reduce the surface tension of the coating layer ( 120) and increase the water contact angle of the coating layer (120), so that the contact angle after scratching or wear is maintained in an excellent state.

[0102] According to an embodiment of the present invention, in order for the coating layer (120) to have a large water contact angle and excellent slip characteristics, and to improve the anti-fouling and stain-removing characteristics of the coating layer (120), while improving the scratch resistance, the coating composition may include a second silane compound represented by chemical formula 2.

[0103] The second silane compound represented by chemical formula 2 is 1H,1H,2H,2H-perfluorooctyltriethoxy silan (1H,1H,2H,2H-Perfluoro-octyltriethoxysilan), 1H,1H,2H,2H-perfluoro octyltrimethoxysilane (1H,1H,2H,2H-Perfluoro-octyltrimethoxysilan), 1H,1H, 2H,2H-perfluorodecyltrimethoxysilane (1H,1H,2H,2H-Perfluoro-decyltrimethox ysilane) and at least one selected from 1H,1H,2H,2H-perfluorodecyltriethoxysilane (1H,1H,2H,2H-Perfl uoro-decyltriethoxysilane).

[0104] A coating layer (120) formed by a coating composition containing a second silane compound having a perfluoro group may have a water contact angle of 100 degrees or more and a water contact angle after scratching of 98 degrees or more. In addition, the coating layer (120) formed by the coating composition containing the second silane compound having a perfluoro group may have a water contact angle of 95 degrees or more after eraser wear.

[0105] The coating layer (120) according to an embodiment of the present invention having a large water contact angle can have excellent sliding properties. As a result, the anti-fouling properties and stain removal properties of the coating layer (120) can be improved. In addition, since the coating layer (120) has excellent sliding properties, it is possible to prevent scratches from occurring on the coating layer (120) in a scratch environment . As a result, the scratch resistance of the coating layer (120) can be improved. In addition, the wear resistance of the coating layer (120) can be improved by fluorine (F) contained in the second silane compound.

[0106] The coating layer (12 0) produced by the coating composition according to an embodiment of the present invention has a water contact angle after scratching of 98 degrees or more. Therefore, even after the surface of the coating layer (120) is exposed to a scratch environment, it can have excellent sliding properties. Therefore , even after the coating layer (120) is exposed to a scratch environment, the coating layer (120) ​​​The contamination prevention characteristics and contamination removal characteristics can be maintained.

[0107] The coating layer (12 0) produced by the coating composition according to an embodiment of the present invention has no more than two scratch counts after being exposed to a scratch environment. Thus, the coating layer (120) is excellent in resistance to a scratch environment and has excellent scratch resistance.

[0108] The coating layer (12 0) produced by the coating composition according to an embodiment of the present invention has a water contact angle after eraser wear of 95 degrees or more. Therefore, even when the coating layer (120) is exposed to a wear environment, it can have excellent sliding characteristics. As a result, even in a wear environment, the coating layer (120) can maintain excellent contamination prevention characteristics and contamination removal characteristics.

[0109] Examples of the second silane compound include 1H,1H,2H,2H-perfluorooctyltriethoxysilane represented by the following Chemical Formula 5 and 1H,1H,2H,2H-perfluorodecyltrimethoxysilane represented by the following Chemical Formula 6. fluoro-decyltrimethoxysilane).

[0110] [Chemical Formula 5] JPEG2025098074000007.jpg2780

[0111] [Chemical Formula 6] JPEG2025098074000008.jpg2688

[0112] According to an embodiment of the present invention, the coating composition includes a third silane compound represented by Chemical Formula 3 in order to improve the mechanical strength, hardness, and scratch resistance of the coating layer (120). It can contain.

[0113] According to an embodiment of the present invention, the third silane compound has four alkoxy groups. As represented by Chemical Formula 3, a silane compound having four alkoxy groups is also called a silane compound having a Q structure.

[0114] According to an embodiment of the present invention, the coating layer (120) formed by the coating composition containing the third silane compound includes a siloxane structure having a Q structure formed in the polymer chain of the siloxane resin. As a result, the coating layer (120) can have excellent hardness and scratch resistance like glass.

[0115] The third silane compound can include at least one of, for example, tetraethyl orthosilicate (TEOS) and tetramethyl orthosilicate (TMOS).

[0116] As the third silane compound, for example, there is tetraethyl orthosilicate (TEOS) represented by the following Chemical Formula 7.

[0117] [Chemical Formula 7] JPEG2025098074000009.jpg4847

[0118] According to an embodiment of the present invention, in order to improve the abrasion resistance, scratch resistance, and water contact angle of the coating layer (120) formed by the coating composition, a first silane compound and a second The contents of the silane compound and the third silane compound are adjusted.

[0119] For example, if the content of the first silane compound contained in the coating composition is insufficient, the coating property and curability of the coating composition will decrease, and the time of the thermosetting process may increase significantly. Also, when the content of the first silane compound is insufficient, the scratch resistance of the coating layer may decrease.

[0120] When the content of the second silane compound in the coating composition is insufficient, the water contact angle of the coating layer formed by the coating composition decreases, and the sliding property may decrease. On the other hand, when the content of the second silane compound is excessively high, the workability decreases, and the coating property may decrease.

[0121] The third silane compound plays a role in shortening the polymerization time of the coating composition, thereby improving the abrasion resistance and scratch resistance of the coating layer (120). On the other hand, when the content of the third silane compound increases, the occurrence of curl in the coating layer (120) increases, and the flexibility and bendability of the coating layer (120) decrease. Specifically, when the coating composition contains an excessive amount of the third silane compound, the flexibility of the coating layer (120) formed by the coating composition may decrease. On the other hand, when the content of the third silane compound is insufficient, the silane Q structure is not sufficiently formed in the polymer chain of the siloxane resin, and the hardness, strength, and scratch resistance of the coating layer formed by the coating composition may decrease.

[0122] In consideration of such characteristics, according to an embodiment of the present invention, with respect to the total number of moles of the silane compound Thus, 80 to 90 mol% of the first silane compound, 1 to 5 mol% of the second silane compound, and 7 to 15 mol% of the third silane compound can be used.

[0123] More specifically, according to one embodiment of the present invention, based on the total number of moles of the silane compound, 82 to 89 mol% of the first silane compound, 1 to 5 mol% of the second silane compound, and 8 to 12 mol% of the third silane compound can be used.

[0124] The solvent enables the silane compounds to be easily polymerized by allowing them to be uniformly mixed.

[0125] According to one embodiment of the present invention, a polymerization curing aid in an amount larger than that of the silane compound on a molar basis can be used. For example, for the smooth mixing and polymerization of the silane compound, the molar ratio of the silane compound to the polymerization curing aid can be in the range of 1:1.2 to 1.8 (silane compound:polymerization curing aid = 1:1.2 to 1.8). More specifically, the molar ratio of the silane compound to the polymerization curing aid can be in the range of 1:1. 4 to 1.6 (silane compound:polymerization curing aid = 1:1.4 to 1.6).

[0126] According to one embodiment of the present invention, a silane compound in an amount larger than that of the polymerization curing aid on a weight basis can be used. For example, to form a coating layer (120) having excellent physical properties, the weight ratio of the polymerization curing aid to the silane compound can be in the range of 1:3 to 6 (solvent:silane compound = 1:3 to 6).

[0127] The coating composition according to one embodiment of the present invention uses water (H2O) as the polymerization curing aid. It contains. Water (H2O) is used as a binder between monomers for forming the siloxane resin and can participate in the dehydration condensation reaction.

[0128] The coating composition according to an embodiment of the present invention may contain diol as a polymerization curing aid . Diol can play a role in maintaining the interval between silane compounds during the curing process of the coating composition, thereby suppressing the occurrence of curl in the coating layer (120) or the coating film (100) due to the curing of the silane compound. According to an embodiment of the present invention, in order to maintain the interval between silane compounds , a linear diol can be used. According to an embodiment of the present invention, diol may include, for example, at least one of ethylene glycol, 1,3 - propanediol, and 1,4 - butanediol .

[0129] Diol plays a role in suppressing the occurrence of curl and increasing the flexibility of the coating layer (120). However, when the content of diol increases, the polymerization time of the coating composition may increase, and the wear resistance and scratch resistance of the coating layer (120) may decrease . Considering such characteristics, it is possible to adjust the contents of water (H2O) and diol .

[0130] . For example, water (H2O) and diol may have a ratio of 1:0.5 - 0.9 on a mole basis . . Considering such characteristics, it is possible to adjust the contents of water (H2O) and diol .

[0131] For example, water (H2O) and diol may have a ratio of 1:0.5~0.9 on a mole basis (ra It can be used in (water: diol = 1: 0.5 to 0.9). More specifically, the molar ratio of water (H2O) to diol can be in the range of 1: 0.6 to 0.8 (water: diol = 1: 0.6 to 0 .8).

[0132] According to one embodiment of the present invention, a larger amount of diol than water (H2O) can be used on a weight basis. For example, water (H2O) and diol can be used in a ratio of 1: 1.5 to 3 on a weight basis (water: diol = 1: 1.5 to 3). More specifically, the weight ratio of water (H2O) to diol can be in the range of 1: 1.5 to 2.5 (water: diol = 1: 1.5 to 2.5).

[0133] The coating composition according to one embodiment of the present invention may contain a catalyst. The catalyst can promote, for example, the formation of a siloxane resin necessary for the formation of the coating layer (120).

[0134] According to one embodiment of the present invention, as the catalyst, acid catalysts such as hydrochloric acid, acetic acid, hydrogen fluoride, nitric acid, sulfuric acid, iodic acid, base catalysts such as ammonia, potassium hydroxide, sodium hydroxide, barium hydroxide, imidazole, and ion exchange resins such as AmberLite can be used. These catalysts may be used alone or in combination of two or more. The catalyst can be added in an amount of 0.0001 to about 10 parts by weight based on 100 parts by weight of the siloxane compound, but the content of the catalyst is not limited thereto.

[0135] The coating composition according to one embodiment of the present invention may contain a base catalyst. As the base catalyst, sodium hydroxide (NaOH) can be used. The coating composition is a silane compound ​​​​​​​​​It may contain 0.05 to 0.1 parts by weight of a base catalyst with respect to 100 parts by weight in total.

[0136] The coating composition according to an embodiment of the present invention may further contain one or more additives selected from the group consisting of a polymerization initiator, an antioxidant, a leveling agent, and a coating aid. 。

[0137] According to an embodiment of the present invention, as the polymerization initiator, for example, a photopolymerization initiator such as an organometallic salt and a thermal polymerization initiator such as an amine or imidazole can be used. The polymerization initiator can be used in an amount of about 0.01 to 2 parts by weight with respect to 100 parts by weight of the siloxane resin 。

[0138] According to an embodiment, an organic solvent can be used to form the coating layer (120). The viscosity of the coating composition is controlled by the organic solvent, whereby the processability of the coating composition is controlled, and the thickness of the coating layer (120) can be easily adjusted.

[0139] As the organic solvent, ketones such as acetone, methyl ethyl ketone, methyl butyl ketone, cyclohexanone ; cellosolves such as methyl cellosolve and butyl cellosolve; ethers such as ethyl ether and dioxane; alcohols such as isobutyl alcohol, isopropyl alcohol, butanol, and methanol ; halogenated hydrocarbons such as dichloromethane, chloroform, and trichloroethylene ; and hydrocarbons such as normal hexane, benzene, and toluene; one or more selected from the group consisting of can be used. 。

[0140] According to an embodiment of the present invention, the coating layer (120) can be formed by polymerization and curing of the coating composition. 。

[0141] More specifically, the coating composition is prepolymerized to form a paste-like prepolymer, and an organic solvent is added to the prepolymer to adjust the viscosity, and then a paste-like coating composition is produced. After the coating composition is coated on the base film (110), curing and polymerization can be performed to form the coating layer (120). .

[0142] In the process of forming the coating layer (120), a siloxane resin can be formed by the coating composition. For example, a siloxane resin can be formed by the substitution reaction and condensation polymerization of alkoxydiol. In the process of forming the siloxane resin, alkoxy may undergo a substitution reaction (or hydrolysis) with water, and condensation polymerization may proceed. Such a reaction may proceed at room temperature, but stirring may be performed at 50°C to 120°C for 1 hour to 20 hours to promote the reaction.

[0143] According to an embodiment of the present invention, after the coating composition according to an embodiment of the present invention is coated on the base film (110) by a method such as coating, casting, or molding and formed, it can be photopolymerized or thermopolymerized to form the coating layer (120).

[0144] When the coating composition is polymerized, the light amount conditions suitable for photopolymerization are 50 mJ / cm 2 or more and 20,000 mJ / cm 2 or less. Before light irradiation, it can be heat-treated at a temperature of 40°C or more and about 200°C or less to obtain a uniform surface. Also, the temperature suitable for thermopolymerization is 40°C or more and 200°C or less, and the temperature is not limited thereto.

[0145] ​​​​​​​​​​​​ FIG. 5 is a cross-sectional view showing a part of a display device (200) according to another embodiment of the present invention, and FIG. 6 is an enlarged cross-sectional view showing the "P" portion of FIG. 5.

[0146] Referring to FIG. 5, a display device (200) according to another embodiment of the present invention includes a display panel (501 ) and a coating film (100) on the display panel (501). FIG. 5 discloses a display device (200) including the coating film (100) of FIG. 1.

[0147] Referring to FIGS. 5 and 6, the display panel (501) includes a substrate (510), a thin film transistor (TFT) on the substrate (510), and an organic light-emitting element (570) connected to the thin film transistor (TFT). The organic light-emitting element (570) includes a first electrode (571), an organic light-emitting layer (572) on the first electrode (571) , and a second electrode (573) on the organic light-emitting layer (572). The display device (200) disclosed in FIGS. 5 and 6 is an organic light-emitting display device.

[0148] The substrate (510) can be made of plastic. Specifically, the substrate (510) can be made of a polyimide -based resin or a polyimide-based film.

[0149] Although not shown, a buffer layer can be disposed on the substrate (510).

[0150] The thin film transistor (TFT) is disposed on the substrate (510). The thin film transistor (TFT) includes a semiconductor layer (520), a gate electrode (530) insulated from the semiconductor layer (520) and overlapping at least a part of the semiconductor layer (520) , a source electrode (541) connected to the semiconductor layer (520), and, ​including a drain electrode (542) connected to the semiconductor layer (520) at a distance from the source electrode (541) and.

[0151] Referring to FIG. 6, a gate insulating film (535) is disposed between the gate electrode (530) and the semiconductor layer (520). An interlayer insulating film (551) is disposed on the gate electrode (530), and the source electrode (541) and the drain electrode (542) may be disposed on the interlayer insulating film (551 ). )

[0152] The planarization film (552) is disposed on the thin film transistor (TFT) and planarizes the upper part of the thin film transistor (TFT ).

[0153] The first electrode (571) is disposed on the planarization film (552). The first electrode (571) is connected to the drain electrode of the thin film transistor (TFT) through a contact hole provided in the planarization film (5 52). The first electrode (571) may also be connected to the source electrode (541 ). ).

[0154] The bank layer (580) is disposed on the first electrode (571) and the planarization film (552), and defines (defines) the pixel region or the light emitting region. For example, by disposing the bank layer (580) in a matrix structure in the boundary region between a plurality of pixels, the pixel region can be defined (defined) by the bank layer (580 ). ).

[0155] The organic light emitting layer (572) is disposed on the first electrode (571). The organic light emitting layer (572) may also be disposed on the bank layer (580). The organic light emitting layer (572) may include one light emitting layer, or may include two or more light emitting layers stacked one on top of the other. Such an organic light emitting layer (572) may include two or more light emitting layers stacked one on top of the other. Light of any one color among red, green, and blue can be emitted from the organic light-emitting layer (572), and white light may also be emitted. And white light may be emitted.

[0156] The second electrode (573) is disposed on the organic light-emitting layer (572).

[0157] The first electrode (571), the organic light-emitting layer (572), and the second electrode (573) may be laminated to form an organic light-emitting element (570).

[0158] Although not shown, when the organic light-emitting layer (572) emits white light, each pixel may include a color filter for filtering the white light emitted from the organic light-emitting layer (572) by wavelength. The color filter is formed on the light traveling path. The thin film encapsulation layer (590) may be disposed on the second electrode (573). The thin film encapsulation layer (590) may include at least one organic film and at least one inorganic film, and at least one organic film and at least one inorganic film may be alternately disposed.

[0159] The coating film (100) is disposed on the display panel (501) having the laminated structure described above. The coating film (100) may be used as a cover window for covering and protecting the light-emitting surface of the display panel (501). The coating film (100) may be used as a cover window for covering and protecting the light-emitting surface of the display panel (501). The coating film (100) may be used as a cover window for covering and protecting the light-emitting surface of the display panel (501).

[0160] The coating film (100) is disposed on the display panel (501) having the laminated structure described above. The coating film (100) may be used as a cover window that covers and protects the light-emitting surface of the display panel (501).

[0161] Hereinafter, the present invention will be described in more detail through specific examples and comparative examples. These examples and comparative examples are only for more specifically explaining the present invention, and the present invention is not limited thereby. The present invention is not limited thereby.

[0162] [Comparative Example 1] Add vinyl trimethoxy silane (Shin-Ets) to a 500 mL flask. 148 g (1 mol) of KBM-1003 (Ku), 27 g (1.5 mol) of water (HO) and NaOH (SAMCHUN CHEMICALS 0.1 g of the mixture was added and stirred at 65°C for 5 min at 100 rpm using a mechanical stirrer. The mixture was stirred for 1 hour to prepare a prepolymer.

[0163] 10 g of the prepolymer was mixed with 10 g of methyl ethyl ketone (MEK), an organic solvent, and 0.1 g of the initiator IRGACURE 184 (BASF) was added to prepare a coating composition in a paste form. The coating material was prepared using a Mayer Bar no. 8. The composition paste was applied to a 50 μm-thick polyimide film (CP The coating layer (120) was formed by applying the coating to a 100% polyester resin (110, manufactured by KOLON Co., Ltd.). A coating film was produced.

[0164] The uncured coating film was dried in an oven at 100°C for 10 minutes and then exposed to UV light. Exposure for 30 seconds using a line lamp (150 mW / cm 2 , 2J / cm 2 ) to harden the coating layer (120). As a result, a coating film (120) having a thickness of 10 μm was obtained. 100) was completed.

[0165] [Comparative Example 2] Add 148 g (1 mol) of vinyltrimethoxysilane (Shin-Etsu, KBM-1003) to a 500 mL flask. ) 19 g (1.05 mol) of water (H₂O), 28 g (0.45 mol) of ethylene glycol (Ethylene Glycol, EG) (Sigma A ldrich), 0.1 g of NaOH were added, and the mixture was stirred at 65 °C for 7 hours to produce a prepolymer A coating film (100) was produced in the same manner as in Comparative Example 1, except as described above . (Mole ratio H₂O:EG = 7:3)

[0166] [Comparative Example 3] 148 g of vinyltrimethoxysilane (Shin-Etsu, KBM-1003), 16 g (0.9 mol) of water (H₂ O), 37 g (0.6 mol) of ethylene glycol (EG, Sigma Aldrich), and 0.1 g of NaOH were placed in a 500 mL flask, and the mixture was stirred at 65 °C for 10 hours to produce a prepolymer. Except for this A coating film (100) was produced in the same manner as in Comparative Example 1 . (Mole ratio H₂O:EG = 6:4)

[0167] [Comparative Example 4] 148 g (1 mol ) of vinyltrimethoxysilane (Shin-Etsu, KBM-1003), 14 g (0.75 mol) of water (H₂O), 47 g (0.7 5 mol) of ethylene glycol (EG, Sigma Aldrich), and 0.1 g of NaOH were placed in a 500 mL flask, and the mixture was stirred at 65 °C for 12 hours to produce a prepolymer. Except for this A coating film (100) was produced in the same manner as in Comparative Example 1. (Mole ratio (mole ra tio H₂O:EG = 5:5)

[0168] [Comparative Example 5] 148 g (1 mol ) 11 g (0.6 mol) of water (H₂O), 56 g (0.9 mol) of ethylene glycol (EG, Sigma Aldrich), and 0.1 g of NaOH were added, and a prepolymer was produced by stirring at 65 °C for 24 hours, except that A coating film (100) was produced in the same manner as in Comparative Example 1. (Mole ratio H₂O:EG = 4:6)

[0169] [Comparative Example 6] 147 g (0.99 mol) of vinyltrimethoxysilane (Shinetsu, KBM-1003), 2 g (0.01 mol) of TEOS (Evonik), 16 g (0.9 mol) of water (H₂O), 37 g (0.6 mol) of ethylene glycol (EG, Sigma Aldrich), and 0.1 g of NaOH were placed in a 500 mL flask, and a prepolymer was produced by stirring at 65 °C for 9 hours, except that A coating film (100) was produced in the same manner as in Comparative Example 1. (Mole ratio KBM-1003:TEOS = 99:1, H₂O:EG = 6:4)

[0170] [Comparative Example 7] 141 g (0.95 mol) of vinyltrimethoxysilane (Shin-Etsu, KBM-1003), 10 g (0.05 mol) of TEOS (Evonik), 16 g (0.915 mol) of water (H₂O), 38 g (0.61 mol) of ethylene glycol (EG, Sigma Aldrich), and 0.1 g of NaOH were placed in a 500 mL flask, and a prepolymer was produced by stirring at 65 °C for 8 hours, except that A coating film (100) was produced in the same manner as in Comparative Example 1. (Mole ratio KBM-1003:TEOS = 95:5, H₂O:EG = 6:4)

[0171] [Comparative Example 8] ​​​​​​​133 g (0.9 mol) of vinyltrimethoxysilane (Shin-Etsu, KBM-1003) was placed in a 500 mL flask, 21 g (0.1 mol) of TEOS (Evonik), 16 g (0.93 mol) of water (H2O), 38 g (0.62 mol) of ethylene glycol (EG, Sigma Aldrich), and 0.1 g of NaOH were added, and the mixture was stirred at 65 °C for 8 hours to produce a coating film (100) in the same manner as in Comparative Example 1, except that a prepolymer was produced. (Mole ratio KBM-1003:TEOS = 9:1, H2O:EG = 6:4)

[0172] [Comparative Example 9] 119 g (0.8 mol) of vinyltrimethoxysilane (Shin-Etsu, KBM-1003) was placed in a 500 mL flask, 42 g (0.2 mol) of TEOS (Evonik), 17 g (0.96 mol) of water (H2O), 40 g (0.64 mol) of ethylene glycol (EG, Sigma Aldrich), and 0.1 g of NaOH were added, and the mixture was stirred at 65 °C for 6 hours to produce a coating film (100) in the same manner as in Comparative Example 1, except that a prepolymer was produced. (Mole ratio KBM-1003:TEOS = 8:2, H2O:EG = 6:4)

[0173] [Comparative Example 10] 104 g (0.7 mol) of vinyltrimethoxysilane (Shin-Etsu, KBM-1003) was placed in a 500 mL flask, 62 g (0.3 mol) of TEOS (Evonik), 18 g (0.99 mol) of water (H2O), 41 g (0.66 mol) of ethylene glycol (EG, Sigma Aldrich), and 0.1 g of NaOH were added, and the mixture was stirred at 65 °C for 5 hours to produce a coating film (100) in the same manner as in Comparative Example 1, except that a (00) was produced. (Mole ratio KBM-1003:TEOS = 7:3, H2O:EG = 6:4)

[0174] [Comparative Example 11] 133 g (0.895 moles) of vinyltrimethoxysilane (Shin-Etsu, KBM-1003), 21 g (0.1 mole) of TEOS (Evonik), 3 g (0.005 mole) of 1H,1H,2H,2H-Perfluoro-octyltriethoxysil ane (Sigma Aldrich), 17 g (0.93 mole) of water (H2O), 39 g (0.62 mole) of ethylene glycol (EG, Sigma Aldrich), and 0.1 g of NaOH were placed in a 500 mL flask and stirred at 65 °C for 8 hours to produce a prepolymer. A coating film (100) was produced in the same manner as in Comparative Example 1, except for the above. (0.5 mol% of the second silane compound among the silane compounds)

[0175] [Example 1] 132 g (0.89 mo les) of vinyltrimethoxysilane (Shin-Etsu, KBM-1003), 21 g (0.1 mole) of TEOS (Evonik), 5 g (0.01 mole) of 1H,1H,2H,2H-Perfluoro-octyltriethoxysilane (Sigma Aldrich), 17 g (0.93 mole) of water (H2O), 39 g (0.62 mole) of ethylene glycol (EG, Sigma Aldrich), and 0.1 g of NaOH were placed in a 500 mL flask and stirred at 65 °C for 8 hours to produce a prepolymer. A coating film (100 ) was produced in the same manner as in Comparative Example 1, except for the above. (Mole ratio of the second silane compound 1H,1H,2H,2H-Perfluoro-octyltrie thoxysilane among the silane compounds is 1.0%)

[0176] ​ [Example 2] 129 g (0.87 mol) of vinyltrimethoxysilane (Shin-Etsu, KBM-1003), 21 g (0.1 mol) of TEOS (Evonik), 15 g (0.03 mol) of 1H,1H,2H,2H-Perfluoro-octyltriethoxysilane (Sigma Aldrich), 17 g (0.93 mol) of water (H2O), 39 g (0.62 mol) of ethylene glycol (EG, Sigma Aldrich), and 0.1 g of NaOH were placed in a 500 mL flask and stirred at 65 °C for 8 hours to produce a prepolymer, and a coating film (100 ) was produced in the same manner as in Comparative Example 1, except for the above. (Molar ratio of the second silane compound 1H,1H,2H,2H-Perfluoro-octyltriethoxysilane among the silane compounds: 3.0%)

[0177] [Example 3] 126 g (0.85 mol) of vinyltrimethoxysilane (Shin-Etsu, KBM-1003), 21 g (0.1 mol) of TEOS (Evonik), 26 g (0.05 mol) of 1H,1H,2H,2H-Perfluoro-octyltriethoxysilane (Sigma Aldrich), 17 g (0.93 mol) of water (H2O), 39 g (0.62 mol) of ethylene glycol (EG, Sigma Aldrich), and 0.1 g of NaOH were placed in a 500 mL flask and stirred at 65 °C for 8 hours to produce a prepolymer, and a coating film (100 ) was produced in the same manner as in Comparative Example 1, except for the above. (Molar ratio of the second silane compound 1H,1H,2H,2H-Perfluoro-octyltriethoxysilane among the silane compounds: 5.0%)

[0178] [Comparative Example 12]​​​​​​ 119 g (0.8 mol) of vinyltrimethoxysilane (Shin-Etsu, KBM-1003), 21 g (0.1 mol) of TEOS (Evonik), and 51 g (0.1 mol) of 1H,1H,2H,2H-Perfluoro-octyltriethoxysilane (Sigma Aldrich) were placed in a 500 mL flask, along with 17 g (0.93 mol) of water (H2O), 39 g (0.62 mol) of ethylene glycol (EG, Sigma Aldrich), and 0.1 g of NaOH. The mixture was stirred at 65 °C for 8 hours to produce a prepolymer. A coating film (100 ) was produced in the same manner as in Comparative Example 1, except for the production of the prepolymer. (Mole ratio of 1H,1H,2H,2H-Perfluoro-octyltriethoxysilane, the second silane compound among the silane compounds, is 10%) (Sigma Aldrich)51g(0.1mol), water(H2O)17g(0.93mol), ethylene glycol (EG, Sigma Aldrich)39g(0.62mol), NaOH 0.1g were added, and the mixture was stirred at 65 °C for 8 hours to produce a prepolymer The coating film (100 ) was produced in the same manner as in Comparative Example 1, except for the production of the prepolymer. (Among the silane compounds, the mole ratio of the second silane compound 1H,1H,2H,2H-Perfluoro-octyltrie thoxysilane is 10%)

[0179] The mole ratios (mole ratio) of the respective components constituting the coating compositions according to Comparative Examples 1 to 12 and Examples 1 to 3, the weight average molecular weight of the prepolymer, and the polydispersity index (PDI) can be summarized as shown in Table 1. The mole ratios (mole ratio) of the respective components constituting the coating compositions according to Comparative Examples 1 to 12 and Examples 1 to 3, the weight average molecular weight of the prepolymer, and the polydispersity index (PDI) can be summarized as shown in Table 1. as follows.

[0180]

Table 1

[0181] [Comparative Example 13] 221 g (0.89 mol) of 3-methacryloxypropyltrimethoxysilane (KBM-503, Shin etsu), 21 g (0.1 mol) of TEOS (Evonik), 5 g (0.01 mol) of 1H,1H,2H,2H-Perfluoro- octyltriethoxysilane (Sigma Aldrich), 17 g (0.93 mol) of water (H2O) , 39 g (0.62 mol) of ethylene glycol (EG, Sigma Aldrich), 0.1 g of NaOH were added, and except that it was stirred at 65 °C for 8 hours to produce a prepolymer, the coating film (100) was produced in the same manner as in Comparative Example 1. (Molar ratio of 1H,1H,2H,2H-Perfluoro-oct yltriethoxysilane among silane compounds is 1%)

[0182] [Comparative Example 14] Into a 500 mL flask, 216 g (0.87 mol) of 3-methacryloxypropyltrimethoxysilane (KBM-503, Shin etsu), 21 g (0.1 mol) of TEOS (Evonik), 15 g (0.03 mol) of 1H,1H,2H,2H-Perfluoro -octyltriethoxysilane (Sigma Aldrich), 17 g (0.93 mol ) of water (H2O), 39 g (0.62 mol) of ethylene glycol (EG, Sigma Aldrich), 0.1 g of NaOH were added, and except that it was stirred at 6 5 °C for 8 hours to produce a prepolymer, the coating film (100) was produced in the same manner as in Comparative Example 1. (Molar ratio of 1H,1H,2H,2H-Perfluoro-o ctyltriethoxysilane among silane compounds is 3%)

[0183] [Comparative Example 15] Into a 500 mL flask, 211 g (0.85 mol) of 3-methacryloxypropyltrimethoxysilane (KBM-503, Shin etsu), 21 g (0.1 mol) of TEOS (Evonik), 26 g (0.05 mol) of 1H,1H,2H,2H-Perfluoro -octyltriethoxysilane (Sigma Aldrich), 17 g (0.93 mol ​​) 39 g (0.62 mol) of ethylene glycol (EG, Sigma Aldrich) and 0.1 g of NaOH were added, and except for the fact that it was stirred at 6 5 °C for 8 hours to produce a prepolymer, the coating film (100) was produced in the same manner as in Comparative Example 1. (Among the silane compounds, 1H,1H,2H,2H-Perfluoro-o ctyltriethoxysilane molar ratio 5%)

[0184] The molar ratio (mole ratio ) of each component constituting the coating composition according to Comparative Examples 12 to 14 and the weight average molecular weight and polydispersity index (PDI) of the prepolymer can be summarized as shown in Table 2.

[0185]

Table 2

[0186] [Comparative Example 16] To the coating composition, KY-1203 (Shinetsu), which is a fluorinated anti-smudge additive (Fluorinated Anti-smudge Additive ), was added at 3% by weight based on the total weight of the silane compound, and the coating film (100) was produced in the same manner as in Comparative Example 8.

[0187] [Example 4] To the coating composition, KY-1203 (Shinetsu), which is a fluorinated anti-smudge additive (Fluorinated Anti-smudge Additive ), was added at 3% by weight based on the total weight of the silane compound, and the coating film (100) was produced in the same manner as in Example 2.

[0188] [Comparative Example 17] ​​​​To the coating composition, 3% by weight of KY-1203 (manufactured by Shinetsu Chemical Co., Ltd.), which is a fluorinated anti-smudge additive (Fluorinated Anti-smudge Additive ), is added based on the total weight of the silane compound. A coating film (100) was produced in the same manner as in Comparative Example 13, except for this .

[0189] [Measurement Example] With respect to the coating films produced in Examples 1 to 4 and Comparative Examples 1 to 17, physical property evaluations were performed based on the following method, and the results are disclosed in Table 3 below.

[0190] (1) Water contact angle As shown in Figure 2, using an MSA (Mobile Surface Analyzer) model from KRUSS, 5 μL of water droplets (WD) were dropped onto the surface of the coating layer (120) at a rate of 2.7 μL / sec. Then, the angle (θ) between the surface of the coating layer (120) and the boundary of the water droplet (WD) was measured 7 times every 0.2 seconds. Such measurements were repeated 5 times, and the average value was taken as the water contact angle.

[0191] In Table 3, the water contact angle is represented by the initial water contact angle.

[0192] (2) Number of scratches The coating film (100) was cut into a size of 100 mm × 50 mm to produce a sample of the coating film. With the coating layer (120) facing upward, after fixing the sample of the coating film to a flat surface using an adhesive tape (manufactured by 3M Company), a 20 mm × 20 mm stainless steel (SUS) jig wrapped with a non-woven fabric of #0000 (manufactured by LIBERON) was used to apply a load of 0.5 kgf and a speed of 45R PM for 10,000 times (during which time) the coating layer of the sample of the coating film was scratched. ​After reciprocating the surface of (120), record the number of scratches observed with the naked eye.

[0193] (3) Water contact angle after scratching Cut the coating film (100) into a size of 100 mm × 50 mm to produce a sample of the coating film. After fixing the sample of the coating film to a flat surface using an adhesive tape (3M Co., Ltd.) such that the coating layer (120) faces upward, use a stainless steel (SUS) jig with a size of 20 mm × 20 mm wrapped with a non-woven fabric of #0000 (LIBERON Co., Ltd.) to reciprocate the surface of the coating layer (120) of the sample of the coating film 10,000 times at a load of 0.5 kgf and a speed of 45 RPM to induce scratches. Next, measure the water contact angle of the sample of the coating film with induced scratches by the method of (1) above. ) and then, measure the water contact angle of the scratched coating film sample by the method of (1) above. After fixing the sample of the coating film to a flat surface using an adhesive tape (3M Co., Ltd.) such that the coating layer (120) faces upward, use a stainless steel (SUS) jig with a size of 20 mm × 20 mm wrapped with a non-woven fabric of #0000 (LIBERON Co., Ltd.) to reciprocate the surface of the coating layer (120) of the sample of the coating film 10,000 times at a load of 0.5 kgf and a speed of 45 RPM to induce scratches. Next, measure the water contact angle of the sample of the coating film with induced scratches by the method of (1) above. Load, 45 RPM speed for 10,000 times (during) reciprocate the surface of the coating layer (120) of the sample of the coating film to induce scratches. Next, measure the water contact angle of the sample of the coating film with induced scratches by the method of (1) above.

[0194] (4) Water contact angle after eraser abrasion Cut the coating film (100) into a size of 200 mm × 50 mm to produce a sample of the coating film. After fixing the sample of the coating film to a flat surface using an adhesive tape (3M Co., Ltd.) such that the coating layer (120) faces upward, fix an "eraser" eraser (eraser for wear resistance test) to a jig and reciprocate the surface of the coating layer (120) of the sample of the coating film 1,000 times at a load of 0.5 kgf and a speed of 45 RPM. Then, measure the water contact angle by the method of (1) above. ) and then, measure the water contact angle by the method of (1) above. After fixing the sample of the coating film to a flat surface using an adhesive tape (3M Co., Ltd.) such that the coating layer (120) faces upward, fix an "eraser" eraser (eraser for wear resistance test) to a jig and reciprocate the surface of the coating layer (120) of the sample of the coating film 1,000 times at a load of 0.5 kgf and a speed of 45 RPM. Then, measure the water contact angle by the method of (1) above. Load, 45 RPM speed for 1,000 times (during) reciprocate the surface of the coating layer (120) of the sample of the coating film. Then, measure the water contact angle by the method of (1) above.

[0195] (5) Curl Curl is obtained by cutting the coating film (100) into a square with a size of 100 mm × 100 mm. ​​​​​​After positioning a sample of the cut coating film on a flat glass substrate , the distance by which the corners of the sample of the coating film are separated from the floor surface (upper surface) of the glass substrate is measured (see "curl" in Figure 3).

[0196] (6) Crack point radius The coating film (100) is cut into a size of 20 mm × 100 mm to produce a sample of the coating film , and the sample of the coating film is attached to a flexure tester ("R adius Bending Tester") so that the coating layer (120) faces the outer direction in which the sample of the coating film is bent . Then, as the radius of curvature is decreased, the sample of the coating film is bent, and it is measured as the radius of curvature at the time when a crack occurs in the sample of the coating film (see Figure 4).

[0197]

Table 3

[0198] Referring to Table 3, it can be confirmed that the coating films (100) according to Examples 1 to 4 have a water contact angle of 100 degrees or more, two or fewer scratch numbers, a water contact angle after scratching of 98 degrees or more, a water contact angle after eraser abrasion of 95 degrees or more, a curl of 2 mm or less, and a crack point radius of 1 mm or less . .

[0199] Also, the coating films (100) according to Examples 1 to 4 have a water contact angle and scratches ​​​The difference from the water contact angle after rubbing is 10 degrees or less, and it can be confirmed that the difference between the water contact angle and the water contact angle after eraser rubbing is 10 degrees or less. It can be confirmed that it is 10 degrees or less.

[0200] Thus, the coating film according to an embodiment of the present invention has a high water contact angle and excellent sliding properties, so it has excellent anti-pollution properties and pollution removal properties, and is excellent in scratch resistance and wear resistance, and it can be confirmed that it can be used as a cover window or a protective film of a flexible display device. It can be confirmed that it can be used.

Claims

1. A base film; and a coating layer on the substrate film; The coating layer is A water contact angle of 100 degrees or more; and Coating film with a water contact angle after scratch of 98 degrees or more: Here, the water contact angle is measured using a 5 μL water droplet (H 2 O) was dropped onto the coating layer and then measured. is defined as the angle between the surface of the coating layer and the boundary of the water droplet, The water contact angle after scratching was measured by dividing the coating film into 100 mm × 50 mm pieces. A sample of the coating film is prepared by cutting the film so that the coating layer faces upward. The coating film sample was then fixed to a flat surface using adhesive tape so that the , a 20mm x 20mm stainless steel (SUS) jig wrapped with #0000 (LIBERON) nonwoven fabric. The coating film was then subjected to 10,000 cycles at a load of 0.5 kgf and a speed of 45 RPM. is the water contact angle measured after reciprocating on the surface of the coating layer of the sample. 。

2. 2. The method according to claim 1, wherein the difference between the water contact angle and the water contact angle after scratching is 10 degrees or less. Coating film.

3. The coating layer has a water contact angle of 100 degrees to 120 degrees and a scratch resistance of 98 degrees to 110 degrees. The coating film according to claim 1, having a water contact angle after etching.

4. The coating layer according to claim 1 has a scratch count of 2 or less. Film: Here, the number of scratches was measured by cutting the coating film into pieces of 100 mm x 50 mm. Prepare a sample of the coated film by placing the coated film on a plate with the coating layer facing upwards. The coating film sample was fixed to a flat surface using adhesive tape, and then A 20mm x 20mm stainless steel (SUS) jig wrapped with LIBERON 000 nonwoven fabric was used. The coating film was sampled 10,000 times at a load of 0.5 kgf and a speed of 45 RPM. The surface of the coating layer was then moved back and forth in a circular motion, and the number of scratches observed with the naked eye was It is a number.

5. The coating layer according to claim 1 has a water contact angle after eraser abrasion of 95 degrees or more. Coating films listed below: The water contact angle after the eraser abrasion was measured by measuring the coating film size of 200 mm x 50 mm. A sample of the coating film was prepared by cutting the film into pieces with the coating layer facing upward. The coating film sample was then fixed to a flat surface using adhesive tape so that the A "Manaslu" eraser (an eraser for wear resistance testing) was fixed to the jig and a load of 0.5 kgf was applied. The coating film sample was rotated 1,000 times at a speed of 45 RPM. The water contact angle was measured after the water was moved back and forth across the coating surface.

6. 6. The method according to claim 5, wherein the difference between the water contact angle and the water contact angle after the eraser is abraded is 10 degrees or less. The coating film described above.

7. The coating layer has a water contact angle after eraser abrasion of 95 degrees to 110 degrees. Item 6. The coating film according to item 5.

8. The coating layer has a curl of 2 mm or less based on a thickness of 10 μm.

1. The coating film according to claim 1: Here, the curl is performed by cutting the coating film into a size of 100 mm x 100 mm. A square cut sample of the coating film was placed on a flat glass substrate. After the coating film sample was cooled, the corner of the coating film sample was lifted from the floor of the glass substrate. It is defined as the distance apart.

9. Based on the thickness of the coating layer being 10 μm, the crack radius (crack point ra) is 1 mm or less. The coating film according to claim 1, having a diameter: Here, the crack point radius is 20 mm. A sample of the coating film was prepared by cutting the sample into a size of 100 mm x 100 mm. the coating layer faces the outside direction in which the coating film sample is bent, The coated film sample was placed in a Radius Bending Tester. After installation, the coating film sample was The coating film sample was bent and cracked. is defined as the radius of curvature at which

10. Contains a silane compound and a polymerization curing aid, The silane compound is A first silane compound represented by the following chemical formula 1: A second silane compound represented by the following chemical formula 2: A third silane compound represented by the following formula 3: The polymerization curing aid is Diol; and Water (H 2 O) a coating composition comprising: [Chemical formula 1] [Chemical formula 2] [Chemical formula 3] Si(OR 3 ) 4 R 11 is a substituted or unsubstituted C2-C5 unsaturated hydrocarbon group, R 12 , R 13 and R 14 Is that each independently represents an alkyl group having 1 to 5 carbon atoms; 21 is a single bond or a C1-C4 alkylene group. R 22 , R 23 and R 24 are each independently a C1 to C5 alkyl group, and m is 3 to 10 is an integer in R 3 is a C1 to C4 alkyl group.

11. The molar ratio of the silane compound to the polymerization curing auxiliary is in the range of 1:1.2 to 1.

8.

11. The coating composition according to claim 10.

12. Relative to the total moles of the silane compound, 80 to 90 mole percent of a first silane compound; 1 to 5 mole percent of a second silane compound; and 7 to 15 mole percent of a tertiary silane compound; 11. The coating composition of claim 10, comprising:

13. The first silane compound is vinyltrimethoxysilane (Vinyl trimethoxysilane) represented by the following formula 4:

11. The coating composition of claim 10, comprising a dimethyl silane. [Chemical formula 4]

14. The second silane compound is 1H,1H,2H,2H-perfluorooctyltriethoxysilane (1H, 1H,2H,2H-Perfluoro-octyltriethoxysilane), 1H,1H,2H,2H-Perfluorooctyltriethoxysilane Methoxysilane (1H,1H,2H,2H-Perfluoro-octyltrimethoxysilane), 1H,1H,2H,2H-Perfluoro-octyltrimethoxysilane Fluorodecyltrimethoxysilane (1H, 1H, 2H, 2H-Perfluoro-decyltrimethoxysilane ) and 1H,1H,2H,2H-perfluorodecyltriethoxysilane (1H,1H,2H,2H-Perflu oro-decyltriethoxysilane) according to claim 10. A coating composition.

15. The third silane compound is tetraethyl orthosilicate (TEO S) and tetramethyl orthosilicate (TMOS) The coating composition according to claim 10, further comprising one of:

16. The diol is ethylene glycol, 1,3-propanediol, The least of the following 1,3-propanediol and 1,4-butanediol The coating composition according to claim 10, further comprising one or more of the following:

17. 11. The coating composition of claim 10, further comprising a base catalyst.

18. The base catalyst is contained in an amount of 0.05 to 0.1 parts by weight based on 100 parts by weight of the total silane compound. The coating composition according to claim 17.

19. A base film; and a coating layer on the substrate film; The coating layer is a coating composition according to any one of claims 10 to 18. A coating film formed by an object.

20. A display panel; and 10. The coating of any one of claims 1 to 9 disposed on the display panel. film; A display device comprising:

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