TWI567144B - Coating composition, and method of manufacturing coating layer of the same - Google Patents

Description

Coating composition and method of manufacturing the same

The invention provides a self-healing coating composition, a self-healing coating layer and a manufacturing method thereof, in particular to provide a self-healing coating composition suitable for a polarizing plate and having excellent self-repairing properties, and a self-healing coating layer thereof and Its manufacturing method.

A common problem with various image displays is that the surface of the display is easily damaged by external forces, resulting in poor image surface and image clarity.

In order to solve the above problems, the prior art proposes some coating compositions to improve the wear resistance and scratch resistance of the display surface. Wherein a coating composition containing a fluorine-containing compound, and the use of 0.05J / cm ² to 2J / cm ² ultraviolet radiation cured so as to obtain wear resistance and removability of a fingerprint from a repair coating. Another coating composition contains methyl methacrylate and a styrene copolymer to form a coating film having excellent scratch resistance and good adhesion on the metal surface.

However, the fluorine-containing compound used in the former coating composition is not only environmentally friendly, but the cost of subsequent recovery is also high. Secondly, the former coating composition is suitable for ultraviolet light irradiation energy, and under long-term sunlight, it is easy to produce yellowing phenomenon and shorten the life of the product. As for the latter coating composition, which is only applicable to metal surfaces, it may not be applied to other material surfaces (such as polarizing plates).

In view of this, it is not necessary to provide a self-healing coating composition suitable for a polarizing plate to improve various defects of the conventional composition.

Accordingly, one aspect of the present invention provides a self-healing coating composition comprising an acrylic resin, a monofunctional or polyfunctional urethane (meth) acrylate oligopolymer, a photoinitiator, Among them, the monofunctional or polyfunctional urethane (meth) acrylate oligo polymer has a high glass transition temperature.

Another aspect of the present invention provides a method of producing a self-healing coating which is subjected to a photocuring reaction using the self-healing coating composition described above, and the resulting self-healing coating has excellent self-healing properties.

Still another aspect of the present invention is to provide a self-healing coating which is obtained by the above-described manufacturing method and which has an excellent self-healing property.

According to the above aspect of the invention, a self-healing coating composition is proposed. In one embodiment, the self-healing coating composition comprises an acrylic resin, a monofunctional or polyfunctional urethane (meth) acrylate oligopolymer, and a photoinitiator. The above acrylic resin contains an acrylate monomer and/or a monofunctional or polyfunctional (meth)acrylic monomer. The above monofunctional or polyfunctional urethane (meth) acrylate oligopolymer, wherein the glass transition temperature of the monofunctional or polyfunctional urethane (meth) acrylate oligo polymer is - 14 ° C to 30 ° C. The photoinitiator described above comprises an alkylphenone compound and at least one of a mercaptophosphorus oxide, a benzoin compound, and/or a benzophenone compound. Based on acrylic resin and monofunctional or The polyfunctional urethane (meth) acrylate oligopolymer is used in an amount of 100 parts by weight, and the acrylic resin is used in an amount of 20 parts by weight to 40 parts by weight, monofunctional or polyfunctional urethane. The (meth) acrylate oligomer is used in an amount of from 60 parts by weight to 80 parts by weight, and the photoinitiator is used in an amount of from 0.5 part by weight to 5 parts by weight.

According to an embodiment of the present invention, the above acrylate type single system is selected from the group consisting of tetrahydrofuran acrylate (THFA), lauric acid acrylate (LA), isodecyl acrylate (IDA), 1,6-hexanediol. A group of diacrylates (HDDA) and any combination of the above materials.

According to an embodiment of the invention, the monofunctional or polyfunctional (meth)acrylic monosystem is selected from the group consisting of hydroxyethyl acrylate (HEA), hydroxyethyl methacrylate (HEMA), and any of the above materials. A group of people formed by a combination.

According to an embodiment of the present invention, the total amount of the acrylic resin and the monofunctional or polyfunctional urethane (meth) acrylate oligo polymer is 100 parts by weight, and the acrylate monomer is used in an amount of 10 Parts by weight to 25 parts by weight.

According to an embodiment of the present invention, the total amount of the acrylic resin and the monofunctional or polyfunctional urethane (meth) acrylate oligo polymer is 100 parts by weight, monofunctional or polyfunctional (methyl The acrylic monomer is used in an amount of from 5 parts by weight to 20 parts by weight.

According to an embodiment of the invention, the monofunctional or polyfunctional urethane (meth) acrylate oligo polymer is selected from the group consisting of amino (ethyl) ethyl hexyl acrylate and urethane di acrylate. a group consisting of esters.

According to an embodiment of the invention, the self-healing coating composition further comprises an additive, wherein the additive is a decane conjugate, and the additive is used in an amount of from 0.8 part by weight to 2 parts by weight.

According to an embodiment of the invention, the self-healing coating composition further comprises a tackifier, wherein the tackifier is selected from the group consisting of rosin, hydroxy rosin, petroleum resin, mercaptan and any combination thereof. One group, and the tackifier is used in an amount of from 0.8 part by weight to 2 parts by weight.

According to another aspect of the invention, a method of making a self-healing coating is presented. In one embodiment, first, the self-healing coating composition described above is applied to at least one surface of the substrate to form a coating film. Then, the coating film is subjected to a drying step and a photocuring reaction to form a dried coating film to form a self-healing coating layer. The photocuring reaction described above irradiates the coating film with ultraviolet light having a total irradiation amount of 100 mJ/cm ² to 1000 mJ/cm ² .

According to an embodiment of the invention, the substrate is a polymer transparent film, and the material of the polymer transparent film is selected from the group consisting of polyester, polyolefin, polyol, polyolefin-polyester copolymer, polyfluorene, poly A group consisting of ether ketone, polyether oxime, polyamidamine, cellulose ester, acrylic resin, cerium-containing resin, fluorine-containing resin, and any combination of the above materials.

According to an embodiment of the invention, the ultraviolet light has a wavelength of 200 nm to 450 nm.

According to still another aspect of the present invention, a self-healing coating is proposed which is produced in accordance with the above-described method for producing a self-healing coating.

The present invention provides a self-healing coating composition, and using the foregoing Self-healing coating made from self-healing coating composition. The self-healing coating composition comprises an acrylic resin, a monofunctional or polyfunctional urethane (meth) acrylate oligopolymer, and a photoinitiator, as described below.

Acrylic resin (A)

In one embodiment, the above acrylic resin (A) is selected from the group consisting of an acrylate monomer (A-1) and/or a monofunctional or polyfunctional (meth)acrylic monomer (A-2) or Any combination of the above.

In the above embodiment, specific examples of the above acrylate monomer (A-1) may include, but are not limited to, tetrahydrofuran acrylate (THFA; A-1-1), lauric acid acrylate (LA), isodecyl group. A group consisting of acrylate (IDA), 1,6-hexanediol diacrylate (HDDA; A-1-2), and any combination of the above materials.

In another example, the above acrylate monomer (A-1) has a glass transition temperature of -15 ° C to -20 ° C and a refractive index of 1.44 to 1.48.

In another embodiment, specific examples of the monofunctional or polyfunctional (meth)acrylic monomer (A-2) described above may include, but are not limited to, hydroxyethyl acrylate (HEA; A-2-1), A group consisting of hydroxyethyl methacrylate (HEMA; A-2-2) and any combination of the above materials.

In the above embodiment, the above monofunctional or polyfunctional (meth)acrylic monomer (A-2) has a glass transition temperature of from 20 ° C to 60 ° C and a refractive index of from 1.44 to 1.48.

In one embodiment, the total amount of the acrylic resin (A) and the monofunctional or polyfunctional urethane (meth) acrylate oligopolymer (B) is 100 parts by weight, and the acrylic resin (A) ) the usage is 20 weight To 40 parts by weight, wherein the acrylate monomer (A-1) is used in an amount of 10 parts by weight to 25 parts by weight, and the monofunctional or polyfunctional (meth)acrylic monomer (A-2) is used. The amount used is from 5 parts by weight to 20 parts by weight.

Monofunctional or polyfunctional urethane (meth) acrylate oligopolymer (B)

In one embodiment, the monofunctional or polyfunctional urethane (meth) acrylate oligopolymer (B) is selected from the group consisting of amino (methyl) ethyl hexyl ester (B-1), Urethane diacrylate (B-2) or any combination of the above polymers. Preferred are polyfunctional urethane (meth) acrylate oligopolymers.

In the above embodiment, the monofunctional or polyfunctional urethane (meth) acrylate oligopolymer (B) has a glass transition temperature of from -14 ° C to 30 ° C and a refractive index of 1.47 or more. It can be made without yellowing. When the glass transition temperature of the monofunctional or polyfunctional urethane (meth) acrylate oligopolymer (B) is less than -14 ° C, the self-healing coating composition produced is too flexible and self-repairing The coating composition is viscous, which in turn reduces its application. When the glass transition temperature of the monofunctional or polyfunctional urethane (meth) acrylate oligopolymer (B) is greater than 30 ° C, the mechanical properties of the self-healing coating composition produced are too hard and brittle. Reduce its self-healing properties.

In one embodiment, the total amount of the acrylic resin (A) and the monofunctional or polyfunctional urethane (meth) acrylate oligopolymer (B) is 100 parts by weight, monofunctional or more The functional urethane (meth) acrylate oligopolymer (B) is used in an amount of from 60 parts by weight to 80 parts by weight.

It is additionally noted that the ratio of the amount of the acrylic resin (A) and the monofunctional or polyfunctional urethane (meth) acrylate oligopolymer (B) used is based on the viscosity measured by the above mixture. (The unit is called cps, centipoise. Seconds). If the viscosity of the above mixture is greater than 2000 cps, the resulting self-healing coating composition will produce a lot of coating marks. On the other hand, if the viscosity of the above mixture is less than 1000 cps, the self-healing coating composition is too loose, the abrasion resistance is lowered, and the self-healing property is deteriorated. Therefore, the viscosity is from 1000 cps to 2000 cps, and the self-healing coating composition has excellent self-healing properties.

Photoinitiator (C)

In one embodiment, the photoinitiator (C) is selected from the group consisting of alkyl benzophenones and at least one of fluorenylphosphine oxides, benzoin compounds, and/or benzophenones. Or any combination of the above polymers.

In the above embodiments, specific examples of the above photoinitiator may include, but are not limited to, 1,2-diphenylethylenedione (Benzil), Benzophenone (Benzophenone), Benzoin (Benzoin), 1-hydroxyl group. Cyclohexyl phenyl ketone (for example, trade name IRGACURE 184; C-1, manufactured by Ciba Specialty Chemical Co., Ltd.), diphenyl (2,4,6-trimethylbenzhydrazide) phosphorus oxide (for example, trade name manufactured by BASF Corporation) LUCIRIN TPO; C-2), methyl benzomethionate (for example, trade name CHEMCURE-55; C-3, manufactured by Ciba Specialty Chemical Co., Ltd.), but the present invention is not limited thereto.

In one embodiment, wherein the photoinitiator comprises 1-hydroxycyclohexyl phenyl ketone (e.g., trade name IRGACURE 184; C-1, manufactured by Ciba Specialty Chemical Co., Ltd.), and at least one is diphenyl (2, 4) , 6-trimethyl benzamidine) phosphorus oxide (for example, the trade name LUCIRIN manufactured by BASF Corporation) TPO; C-2) and methyl benzomethionate (for example, trade name CHEMCURE-55; C-3, manufactured by Ciba Specialty Chemical Co., Ltd.), but the present invention is not limited thereto. In an example, the photo-initiator of the above composition has a larger ultraviolet light absorption wavelength of about 280 nm, and can achieve a photocuring reaction conversion rate of at least 95%, where the photocuring reaction conversion rate is by light. The maps detected by the Reaction Differential Scanning Card Meter (UV-DSC), as well as the techniques and methods well known to those of ordinary skill in the art, are not described herein.

In one embodiment, the total amount of the acrylic resin (A) and the monofunctional or polyfunctional urethane (meth) acrylate oligopolymer (B) is 100 parts by weight, the photoinitiator ( C) is used in an amount of from 0.5 part by weight to 5 parts by weight.

Additive (D)

In other embodiments, the self-healing coating composition of the present invention may more optionally comprise an additive (D). The additive (D) used herein may be a decane conjugate having a functional group to improve the adhesion of the self-healing coating to the surface of the substrate and the weather resistance under high temperature and high pressure. The aforementioned additives (D) may be used singly or in combination of plural kinds.

In an exemplary embodiment, specific examples of the above decane conjugate may include, but are not limited to, vinyl trimethoxy decane, vinyl triethoxy decane, tri-propylene methoxy propyl trimethoxy decane, allyl trimethyl Oxy decane, allyl triethoxy decane, 3-glycidoxy propyl trimethoxy decane, γ-glycidoxy propyl trimethoxy decane, N-(β-aminoethyl)- γ-Aminopropylmethyldiethoxydecane, and the like.

In one embodiment, the total amount of the acrylic resin (A) and the monofunctional or polyfunctional urethane (meth) acrylate oligopolymer (B) is 100 parts by weight, and the additive (D) The amount used is from 0.8 part by weight to 2 parts by weight.

Tackifier (E)

The self-healing coating composition of the present invention may further selectively add a tackifier (E) in other embodiments without affecting the efficacy of the present invention. The tackifier (E) used herein may be selected from rosins, hydroxy rosins, petroleum resins, thiols having different carbon numbers to improve the oxidation resistance, adhesion and abrasion resistance of the self-healing coating. The above-mentioned tackifiers (E) may be used singly or in combination of plural kinds.

In one embodiment, the total amount of the acrylic resin (A) and the monofunctional or polyfunctional urethane (meth) acrylate oligopolymer (B) is 100 parts by weight, and the use of a tackifier The amount is from 0.8 part by weight to 2 parts by weight.

Self-healing coating manufacturing method

Another aspect of the present invention is to provide a method of making a self-healing coating. In one embodiment, first, the self-healing coating composition described above is applied to at least one surface of the substrate to form a coating film.

In one embodiment, the substrate is a polymer transparent film, and the material of the polymer transparent film is selected from the group consisting of polyester, polyolefin, polyol, polyolefin-polyester copolymer, polyfluorene, polyether. A group consisting of a ketone, a polyether oxime, a polyamidamine, a cellulose ester, an acrylic resin, an oxime-containing resin, a fluorine-containing resin, and any combination of the above materials.

In an example, the specific example of the substrate may include, but is not limited to, a polyester film such as polyethylene terephthalate, polybutylene terephthalate or polyethylene terephthalate, or polyethylene. Membrane, polypropylene film, cellophane, cellulose diacetate film, cellulose triacetate film, cellulose acetate butyl ester film, polyvinyl chloride film, polyvinylidene chloride film, polyvinyl alcohol film, ethylene-vinyl acetate copolymerization Film, polystyrene film, polycarbonate film, polymethylpentene film, polyfluorene film, polyether ether ketone film, polyether ruthenium film, polyether phthalimide film, polyimide film, fluororesin A film, a polyamide film, an acrylic resin film, a norbornene resin film, a cycloolefin resin film, or the like.

In one embodiment, the thickness of the substrate is not limited and may be, for example, 15 μm to 300 μm, preferably 30 μm to 200 μm, but the invention is not limited thereto.

In one embodiment, the self-healing coating composition may be applied to a substrate by a coating method generally known in the art, and examples of the coating method include a bar coating method, a knife coating method, and a roll coating method. The methods such as the sheet coating method and the gravure coating method are not limited thereto.

In order to improve the adhesion between the self-healing coating composition and the substrate, surface treatment may be performed on at least one surface by an oxidation method or a roughening method. The above oxidation method may be, for example, corona discharge treatment, plasma treatment, chromic acid treatment (wet type), flame treatment, hot air treatment, ozone ultraviolet light irradiation treatment, or the like. The above-described roughening method can be, for example, sand blasting, solvent treatment or the like. The above surface treatment method can be appropriately selected depending on the kind of the substrate, and is preferably corona discharge treatment.

In one embodiment, the coating film is subjected to a drying step and a photocuring reaction is carried out to form a dried coating film to form a self-healing coating layer. The photocuring reaction described above can be carried out using a high pressure mercury lamp, an electrodeless lamp, a metal halide lamp, or a xenon lamp. When the photocuring reaction is carried out, the total irradiation amount of the ultraviolet light may be, for example, 100 mJ/cm ² to 1000 mJ/cm ² , and the wavelength of the suitable ultraviolet light may be, for example, 200 nm to 450 nm.

If the total irradiation amount of the photocuring reaction is less than 100 mJ/cm ² , the curing of the self-healing coating is incomplete. If the total irradiation amount of the photocuring reaction is more than 1000 mJ/cm ² , the self-healing coating is over-cured, accelerates the yellowing phenomenon, shortens the life, and loses the self-repairing function. Since the self-healing coating composition of the present invention can be photocured by ultraviolet light having a low total irradiation amount, the self-healing coating layer thus obtained is less likely to cause yellowing under irradiation of sunlight.

The self-healing coating of the present invention can be applied to liquid crystal displays, organic light-emitting devices, plasma displays, and mobile phone screens, but the scope of application of the present invention is not limited thereto.

The following examples are used to illustrate the application of the present invention, and are not intended to limit the present invention. Those skilled in the art can make various changes without departing from the spirit and scope of the present invention. Retouching.

Example 1

In this embodiment, first, according to the first table, 30 parts by weight of an acrylic resin is used, wherein 1,6-hexanediol diacrylate (HDDA) is used in an amount of 20 parts by weight, and hydroxyethyl acrylate (HEA) is used. The amount used was 10 parts by weight. 70 parts by weight of monofunctional or polyfunctional urethane (meth) acrylate An ester oligopolymer in which an amino (meth)ethylhexyl ester is used in an amount of 35 parts by weight and a urethane diacrylate is used in an amount of 35 parts by weight. 5 parts by weight of a photoinitiator in which 1-hydroxycyclohexyl phenyl ketone (for example, trade name IRGACURE 184, manufactured by Ciba Specialty Chemical Co., Ltd.) is used in an amount of 3 parts by weight, diphenyl (2, 4, 6-three) The use amount of methotrexate phosphorus oxide (for example, trade name LUCIRIN TPO manufactured by BASF Corporation) is 1 part by weight, and methyl benzyl methacrylate (for example, trade name CHEMCURE-55, manufactured by Ciba Specialty Chemical Co., Ltd.) is used. The amount is 1 part by weight. Further, 1 part by weight of an additive, that is, a decane conjugate, and 1.5 parts by weight of a tackifier are added, wherein the hydrogenated rosin is used in an amount of 1 part by weight and the mercaptan is used in an amount of 0.5 part by weight.

The self-healing compositions described above are mixed with each other and stirred to thoroughly mix the components with each other. The self-healing composition configured as described above is applied onto at least one surface of the cellulose triacetate film to form a coating film. After the drying step of the coating film, the UV curing system (Fusion UV System Inc, model CS48; equipped with the Model LH-6 Fusion D-bulk bulb, model F300S conveying system) is used to photocuring the coating film. , to cure to form a self-healing coating. In the photocuring reaction, the ultraviolet light irradiation power is 100 W, the irradiation distance is 530 mm, the total irradiation amount is 100 mJ/cm ² to 1000 mJ/cm ² , and the coating film is passed through the ultraviolet light irradiation system at a speed of 2 meters per minute. Light curing reaction. The obtained self-healing coating was subjected to measurement of the characteristics described later, and the results are shown in Table 1.

Example 2 to Example 5 and Comparative Example 1 to Comparative Example 6

Example 2 to Example 5 and Comparative Example 1 to Comparative Example 6 It was produced in the same manner as described in Example 1, except that the amount of each component used was different. The obtained self-healing coating was subjected to measurement of the characteristics described later, and the results are shown in Table 1.

Evaluation method

Surface type analysis

The samples obtained in Examples 1 to 5 and Comparative Examples 1 to 6 were visually observed for the appearance of the surface of the self-healing coating before and after the irradiation of ultraviolet light, and the results are shown in Table 1.

2. Wear resistance test

The samples obtained in Examples 1 to 5 and Comparative Examples 1 to 6 were placed under steel wool, and were weighed by a weight of 50 g to 300 g, and subjected to a back and forth rubbing test. After standing for 30 minutes, the recovery was observed using a microscope (Sensofar), and the results are shown in Table 1.

3. Yellowing test

The samples obtained in Examples 1 to 5 and Comparative Examples 1 to 6 were placed in a QUV ultraviolet accelerated aging tester (Q-LAB, model number QUV/SE), the temperature was set to 60 ° C, and the irradiation power was 0.89 W. The irradiation time is 500 hours. Thereafter, the amount of change in b value (Δb) was measured and calculated using a spectrophotometer (Shimadzu Corporation, model UV-2450). The smaller the Δb, the smaller the degree of yellowing; the larger the Δb, the higher the degree of yellowing. Large, the results are shown in Table 1.

4. Weather resistance test

The sample preparation environment obtained in Example 1 to Example 5 and Comparative Example 1 to Comparative Example 6 was set at a temperature of 80 ° C and a relative humidity of 9%. In the ten oven (Espec), a hundred-pack test was conducted after 500 hours. The above-mentioned hundred-cell adhesion test uses a hundred-grain knife (for example, the trade name ZCC manufactured by Zehntner Co., Ltd.) to cut a square of 1 mm by 1 mm area, and the tape is stuck on the surface of the sample and then torn, and the self-repair coating is calculated. The percentage of the area of the layer peeling off. The percentage of area peeling from the self-healing coating is evaluated according to the American Society for Testing and Materials (ASTM) standard, number D3359, and is classified into 0B~5B grades. The higher the number of grades, the smaller the percentage of peeling off the area of the self-healing coating. The better the weather resistance. The number of grades evaluated was evaluated according to the following criteria, and the results are shown in Table 1.

5B: indicates an area of 0% peeling off

4B: indicates that the area is less than 5 percent peeling off

3B: indicates an area of 5 to 15 percent exfoliation

2B: indicates an area of 15% to 35% exfoliation

1B: indicates an area of 35 to 65 percent exfoliation

0B: indicates that the area is more than 65 percent exfoliated

From the results of the surface profile analysis of the first table, it was found that no traces were observed in Examples 1 to 5 and Comparative Example 6. However, Comparative Example 1 and Comparative Example 3 to Comparative Example 5 had (slight) orange peel or coating marks on the surface of the self-healing coating layer before or after irradiation with ultraviolet light.

Next, from the results of the abrasion resistance test of the first table, it was found that the samples obtained in Examples 1 to 5 were subjected to weights of 200 g to 300 g. The samples of Comparative Examples 1 to 6 were subjected to weights of 50 g to 250 g.

Furthermore, as can be seen from the results of the yellowing test of the first table, Example 1 The sample Δb obtained in Example 5 was 0.3 to 0.9, and the sample Δb of Comparative Example 1 to Comparative Example 6 was 0.2 to 0.9.

Further, from the results of the weather resistance test of the first table, it is understood that the number of stages of the samples obtained in Examples 1 to 5 is 4B to 5B, and the object of the present invention can be surely achieved. In contrast, the weather resistance of the samples of Comparative Examples 1 to 6 has a grade of 0B to 5B, but it cannot simultaneously have characteristics such as complete appearance, abrasion resistance, and low yellowing. In summary of the above evaluation methods, it can be known that the self-healing coating composition of the present invention and the self-healing coating have better self-healing properties, which can indeed achieve the purpose of the invention.

It is apparent from the above-described embodiments of the present invention that the self-healing coating composition, the self-healing coating, and the method of producing the same of the present invention have the advantage of utilizing an oligomeric polymer to increase the abrasion resistance of the self-healing coating composition. In addition, by using a plurality of different wavelengths of photoinitiator, the coating film is irradiated with ultraviolet light having a lower total irradiation amount, thereby reducing the yellowing phenomenon of the self-healing coating layer and prolonging its life.

The present invention has been disclosed in the above embodiments, and is not intended to limit the present invention. Any one of ordinary skill in the art to which the present invention pertains can make various changes without departing from the spirit and scope of the invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims.

Claims (14)

A coating composition comprising: an acrylic resin, wherein the acrylic resin comprises an acrylate monomer and/or a monofunctional or polyfunctional (meth)acrylic monomer, and the acrylate monomer comprises 1,6- Hexanediol diacrylate (HDDA) and no tetrahydrofuran acrylate (THFA), the monofunctional or polyfunctional (meth)acrylic monomer comprising hydroxyethyl acrylate (HEA); a monofunctional or polyfunctional a urethane (meth) acrylate oligo polymer, wherein the monofunctional or polyfunctional urethane (meth) acrylate oligopolymer comprises amino (methyl) ethyl hexyl ester; Photoinitiator. The coating composition of claim 1, wherein the acrylate monomer further comprises one of lauric acid acrylate (LA), isodecyl acrylate (IDA), and any combination of the above materials. The group, and/or the monofunctional or polyfunctional (meth)acrylic monomer further comprises hydroxyethyl methacrylate (HEMA). The coating composition of claim 1, wherein the monofunctional or polyfunctional urethane (meth) acrylate oligomer further comprises a urethane diacrylate. The coating composition of claim 1, wherein the photoinitiator comprises an alkylphenone compound and at least one of a mercaptophosphorus oxide, a benzoin compound, and/or a benzophenone. Class of compounds. The coating composition according to claim 1, wherein the acrylic resin and one of the monofunctional or polyfunctional urethane (meth) acrylate oligomers are used in an amount of 100 parts by weight. One of the acrylic resins is used in an amount of from 20 parts by weight to 40 parts by weight, and/or one of the monofunctional or polyfunctional urethane (meth) acrylate oligo polymers is used in an amount of 60 parts by weight to 80 parts by weight, and/or one of the photoinitiators is used in an amount of from 0.5 part by weight to 5 parts by weight. The coating composition according to claim 1, wherein the acrylic resin and one of the monofunctional or polyfunctional urethane (meth) acrylate oligomers are used in an amount of 100 parts by weight. One of the acrylate monomers is used in an amount of from 10 parts by weight to 25 parts by weight, and/or one of the monofunctional or polyfunctional (meth)acrylic monomers is used in an amount of from 5 parts by weight to 20 parts by weight. . The coating composition of claim 1, further comprising an additive, wherein the additive is a decane conjugate. The coating composition according to claim 7, wherein the acrylic resin and one of the monofunctional or polyfunctional urethane (meth) acrylate oligomers are used in an amount of 100 parts by weight. One of the additives is used in an amount of from 0.8 part by weight to 2 parts by weight. The coating composition of claim 1, further comprising a tackifier, wherein the tackifier is selected from the group consisting of rosin, hydroxy rosin, petroleum resin, mercaptan, and any combination thereof. Form a group of people. The coating composition according to claim 9, wherein the acrylic resin and one of the monofunctional or polyfunctional urethane (meth) acrylate oligomers are used in an amount of 100 parts by weight. One of the tackifiers is used in an amount of from 0.8 part by weight to 2 parts by weight. The coating composition of claim 1, wherein one of the monofunctional or polyfunctional urethane (meth) acrylate oligo polymers has a glass transition temperature of from -14 ° C to 30 ° C. A method of producing a coating comprising: coating a coating composition according to any one of claims 1 to 11; applying the coating composition to at least one surface of a substrate, Forming a coating film; performing a drying step on the coating film; and performing a photocuring reaction to form the dried coating film into a coating, wherein the photocuring reaction irradiates the coating film with an ultraviolet light. The method for producing a coating according to claim 12, wherein the substrate is a polymer transparent film, and one of the materials of the polymer transparent film is selected from the group consisting of polyester, polyolefin, and polyol. A group consisting of a polyene-polyester copolymer, a polybenzazole, a polyetherketone, a polyether oxime, a polyamide, a cellulose ester, an acrylic resin, a ruthenium-containing resin, a fluorine-containing resin, and any combination of the above materials. The method of producing a coating according to claim 12, wherein a total irradiation amount of the ultraviolet light is from 100 mJ/cm ² to 1000 mJ/cm ² , and/or one of the ultraviolet light wavelengths is from 200 nm to 450 nm.