TWI849460B - Antibacterial and antifogging coating composition for display, method of manufacturing the same and transparent sheet and car display containing the same - Google Patents

Abstract

The present invention is about an antibacterial and antifogging coating composition for a display, a method of manufacturing the same, a transparent sheet and a car display containing the same. The antibacterial and antifogging coating composition for a display is obtained by subjecting zwitterionic polymer and emulsifier to a polymerization step. The transparent sheet obtained by coating a substrate with the antibacterial and antifogging coating composition for a display has transparency, antibacterial property, antifogging property and water-resistant, thereby ensuring reliable operation of car displays under the harshest environments.

Description

Antibacterial antifogging display coating composition, its manufacturing method, transparent sheet containing the same, and vehicle display

The present invention relates to a coating composition, in particular to an antibacterial and antifogging display coating composition, a manufacturing method thereof, a transparent sheet containing the same, and a vehicle display.

Car monitors bring convenience and entertainment to driving, but they have the disadvantages of being easily attached to germs and fogging. Specifically, car monitors are often operated by hand touch, and hands are easily attached to germs. Therefore, if they are not cleaned properly, car monitors can easily become a medium for contact infection. Secondly, the temperature inside the car is usually maintained at a comfortable temperature. However, if the difference between the temperature inside the car and the temperature outside the car is too large, the moisture in the air will easily condense on the car monitor to form water droplets, which will not only scatter the image projected by the car screen, thereby affecting the convenience of use, but also cause the electronic components in the car screen to become damp and malfunction.

It is known that the means to prevent water vapor from condensing on the car display include setting a polyethylene terephthalate (PET) protective sheet outside the horizontal polarizer of the car display and applying antifogging agent on the PET protective sheet. Antifogging agent has a hydrophilic end and a hydrophobic end, and belongs to an emulsifier. The hydrophilic end can reduce the surface tension of water, so that water vapor condenses to form a water film instead of forming water droplets, and the hydrophobic end can make the water film flow. However, since the emulsifier is soluble in water, when the water film flows, it will also take away the antifogging agent, so the timeliness and number of uses of the antifogging agent are limited.

In view of this, there is an urgent need for a coating composition that can form a transparent sheet with transparency, antibacterial properties, antifogging properties and waterproof properties to solve the above problems.

Therefore, one aspect of the present invention is to provide a method for manufacturing an antibacterial antifogging display coating composition, comprising a step of polymerizing a diionic polymer and an emulsifier. After the antibacterial antifogging display coating composition is applied to a substrate, the formed transparent sheet has transparency, antibacterial properties, antifogging properties and waterproof properties.

Another aspect of the present invention is to provide an antibacterial and antifogging display coating composition, which is prepared by the above-mentioned manufacturing method.

Another aspect of the present invention is to provide an antibacterial and antifogging transparent sheet, comprising a substrate and a coating layer formed by the antibacterial and antifogging display coating composition.

Another aspect of the present invention is to provide a vehicle display comprising the transparent sheet.

According to the above aspects of the present invention, a method for manufacturing an antibacterial antifogging display coating composition is proposed. First, a starting material is provided, wherein the starting material may include but is not limited to a diionic polymer solution, an emulsifier, a thermal polymerization initiator, and a balanced amount of water. Then, the starting material is polymerized at 55°C to 65°C to obtain an antibacterial antifogging display coating composition.

The diionic polymer solution may include but is not limited to a diionic polymer and a solubilizer, wherein the diionic polymer includes a cationic group having at least one double bond. The solubilizer may be, for example, selected from a group consisting of a saturated physiological saline solution, methanol, ethanol, and the like. Based on the content of the starting material being 100% by weight, the content of the diionic polymer may be, for example, 1% to 5% by weight, and the content of the solubilizer in the starting material may be, for example, 10% to 15% by weight. The emulsifier may include but is not limited to at least one double bond, wherein based on the content of the starting material being 100% by weight, the content of the emulsifier is greater than or equal to 15% by weight and less than or equal to 25% by weight. Based on the content of the starting material being 100 wt%, the content of the thermal polymerization initiator may be, for example, 0.1 wt% to 0.3 wt%.

AU表示式(1)中-CR¹R²-所示之具有取代基之二價亞甲基，BU表示式(1)中-CR ⁴HCH ₂CR ⁵H-所示的具有取代基之二價伸丙基，m表示5至120的整數，n表示5至120的整數，R ¹表示碳數3至18之直鏈狀、支鏈狀或環狀烷基、酯基[亦即-COOR ^x，其中R ^x表示碳數3至18之直鏈狀、支鏈狀或環狀烷基、芳香基或碳數5至12之雜芳基(heteroaryl)]、芳香基或碳數5至12之雜芳基，R ²為氫原子或甲基，R ⁴為羧基，且R ⁵為陽離子基。 In some embodiments of the present invention, the diionic polymer may include but is not limited to a block copolymer, a random copolymer or an alternating copolymer of AU _m BU _n described in formula (1).

AU represents a divalent methylene group having a substituent represented by -CR ¹ R ² - in formula (1), BU represents a divalent propylene group having a substituent represented by -CR ⁴ HCH ₂ CR ⁵ H- in formula (1), m represents an integer from 5 to 120, n represents an integer from 5 to 120, R ¹ represents a linear, branched or cyclic alkyl group having 3 to 18 carbon atoms, an ester group [i.e., -COOR ^x , wherein R ^x represents a linear, branched or cyclic alkyl group having 3 to 18 carbon atoms, an aromatic group or a heteroaryl group having 5 to 12 carbon atoms], an aromatic group or a heteroaryl group having 5 to 12 carbon atoms, R ² is a hydrogen atom or a methyl group, R ⁴ is a carboxyl group, and R ⁵ is a cationic group.

In some embodiments of the present invention, the cationic group may be, for example, N,N-dimethylammonium ethylamino vinyl, N,N-dimethylammonium propylamino vinyl, N,N-dimethylammonium butylamino vinyl or N,N-dimethylammonium pentylamino vinyl.

In some embodiments of the present invention, the emulsifier may include but is not limited to polyoxyethylene sorbitan monooleate and/or sorbitan monooleate.

In some embodiments, the thermal polymerization initiator may include, but is not limited to, 2,2′-azobisisobutyronitrile, 2,2′-azobis-2-methylbutyronitrile, 2,2′-azobis(2-methylpropionic acid)dimethyl ester and/or 4,4′-azobis-4-cyanovaleric acid.

According to another aspect of the present invention, an antibacterial antifogging display coating composition is provided, which is produced by the above-mentioned manufacturing method.

According to another aspect of the present invention, an antibacterial and antifogging transparent sheet is provided, which may include but is not limited to a substrate and a coating layer, wherein the coating layer is disposed on a surface of the substrate, and the coating layer is formed using the above-mentioned antibacterial and antifogging display coating composition.

In some embodiments of the present invention, the transparent sheet does not fog after being placed in hot water at 45°C to 55°C for 30 seconds to 90 seconds.

In some embodiments of the present invention, the relative antibacterial rate of the surface of the transparent sheet relative to the surface of the substrate is at least 80%.

According to another aspect of the present invention, a vehicle display is provided, which may include the transparent sheet mentioned above.

The antibacterial antifogging display coating composition of the present invention and its manufacturing method are applied, wherein the antibacterial antifogging display coating composition is obtained by polymerizing a diionic polymer solution containing a cationic group and an emulsifier, and after the antibacterial antifogging display coating composition is applied to a substrate, the formed transparent sheet has transparency, antibacterial property, antifogging property and waterproof property, thereby ensuring that the automotive display can still be operated in the worst environment.

As mentioned above, the present invention provides an antibacterial antifogging display coating composition, a manufacturing method thereof, a transparent sheet containing the same, and an automotive display, which is obtained by polymerizing a diionic polymer and an emulsifier. After the antibacterial antifogging display coating composition is applied to a substrate, the formed transparent sheet has transparency, antibacterial properties, antifogging properties, and waterproof properties, thereby ensuring that the automotive display can still operate in the worst environment.

Please refer to FIG. 1, which is a flow chart of a method 100 for manufacturing an antibacterial antifogging display coating composition according to an embodiment of the present invention. First, as shown in step 110, a starting material is provided, wherein the starting material may include but is not limited to a diionic polymer solution, an emulsifier, a thermal polymerization initiator, and water. Then, the starting material is polymerized at 55° C. to 65° C. (as shown in step 130) to obtain an antibacterial antifogging display coating composition (as shown in step 150).

The above-mentioned diionic polymer solution may include but is not limited to diionic polymer and solubilizer. The diionic polymer includes a cationic group, and the cationic group has at least one double bond to facilitate the polymerization reaction described in detail below. In one embodiment, the diionic polymer may include but is not limited to the structure described in patent number TW I496819 B, wherein the diionic polymer includes a block copolymer, random copolymer or alternating copolymer of AU _m BU _n described in formula (1). AU represents a divalent methylene group having a substituent represented by -CR ¹ R ² - in formula (1), BU represents a divalent propylene group having a substituent represented by -CR ⁴ HCH ₂ CR ⁵ H- in formula (1), m represents an integer of 5 to 120, and n represents an integer of 5 to 120, wherein AU has an anchoring group, and BU has a diionic group or a pseudo-diionic group. (1)

In detail, ^R1 may be, for example, a linear, branched or cyclic alkyl group having 3 to 18 carbon atoms, an ester group [i.e., ^-COORx , wherein ^Rx represents a linear, branched or cyclic alkyl group having 3 to 18 carbon atoms, an aromatic group or a heteroaryl group having 5 to 12 carbon atoms], an aromatic group or a heteroaryl group having 5 to 12 carbon atoms, ^R2 may be, for example, a hydrogen atom or a methyl group, ^R4 may be, for example, a carboxyl group (-COOH), and ^R5 may be, for example, a cationic group.

In one embodiment, the cationic group may be, for example, N,N-dimethylammnio-ethylene-1-amino-vinyl, N,N-dimethylammnio-propylene-1-amino-vinyl, N,N-dimethylammnio-butylene-1-amino-vinyl, and N,N-dimethylammnio-pentylene-1-amino-vinyl.

Based on the content of the starting material being 100 wt %, the content of the diionic polymer can be, for example, 1 wt % to 5 wt %, preferably 1 wt % to 3 wt %. If the content of the diionic polymer is not within the above range, the antibacterial and/or waterproof properties of the transparent sheet formed by the obtained coating composition are not good, or the antibacterial, antifogging and/or waterproof properties of the transparent sheet formed by the coating composition are not significantly improved when the production cost is greatly increased.

The cosolvent needs to be able to fully dissolve the diionic polymer. In one embodiment, the cosolvent can be, for example, selected from a group consisting of physiological salt saturated solution, methanol, ethanol, and the above. In one embodiment, based on the content of the starting material being 100 weight%, the content of the cosolvent can be, for example, 10 weight% to 15 weight%. If the content of the cosolvent is too little, the diionic polymer cannot be uniformly mixed in the starting material. However, if the content of the cosolvent is too much, the antibacterial antifog display coating composition is easy to retain the cosolvent in the coating layer formed after being applied on the substrate, thereby irritating the skin and causing safety issues in use.

The emulsifier has a double bond to polymerize with the double bond on the cationic group of the diionic polymer. In one embodiment, the emulsifier may include but is not limited to polyoxyethylene sorbitan monooleate (such as Tween ^® 80) and/or sorbitan monooleate (such as Span ^® 80). In one embodiment, the emulsifier may optionally include a long chain of unsaturated fatty acid hydrocarbons containing 11 to 17 carbons.

Based on the content of the starting material being 100 weight percent, the content of the emulsifier may be, for example, greater than 15 weight percent and less than or equal to 25 weight percent, preferably 18 weight percent to 22 weight percent. If the content of the emulsifier is not within the above range, the film-forming property of the antibacterial antifogging display coating composition is poor, and the antifogging property of the antibacterial antifogging transparent sheet is poor, or too much emulsifier will dilute the content of the diionic polymer in the starting material, resulting in the antibacterial antifogging display coating composition being unable to form an antibacterial transparent sheet, and after being applied to the substrate, a longer drying time is required to form a coating layer.

The above-mentioned thermal polymerization initiator may include but is not limited to 2,2'-azobisisobutyronitrile, 2,2'-azobis-2-methylbutyronitrile, 2,2'-azobis(2-methyl propionic acid) dimethyl ester and/or 4,4'-azobis-4-cyanovaleric acid. Based on the content of the starting material being 100 weight%, the content of the thermal polymerization initiator may be, for example, 0.1 weight% to 0.3 weight%. If the content of the thermal polymerization initiator is not within the above range, the efficiency of the subsequent polymerization step is poor, or the antibacterial and antifogging properties of the transparent sheet formed by the coating composition are not significantly improved when the production cost is greatly increased. The above-mentioned water may be, for example, distilled water, secondary water and/or deionized water.

After the antibacterial antifogging display coating composition prepared above is applied to a substrate, a transparent sheet can be formed, wherein the transparent sheet includes a substrate and a coating layer, the coating layer is disposed on the surface of the substrate, and the coating layer is formed by the antibacterial antifogging display coating composition. The material type of the above-mentioned substrate is not limited, and a material with high transparency is preferred, and a specific example is polyethylene terephthalate (PET). In one embodiment, the method for forming the coating layer is not limited. In a specific example, the antibacterial antifogging display coating composition is applied to the substrate by printing, and after drying at 110°C to 130°C for 20 minutes to 30 minutes, a coating layer is formed on the surface of the substrate.

The above-mentioned transparent sheet has transparency, antibacterial property, antifog property and waterproof property. The "transparency" mentioned herein refers to the good light transmittance of the transparent sheet, and the evaluation method is not limited, for example, it can be evaluated by naked eyes. The "antibacterial property" mentioned herein refers to the surface of the transparent sheet being difficult to be attached by bacteria, viruses and/or droplets containing them. The evaluation method of antibacterial property is not limited, for example, it can be evaluated by relative bacterial count percentage or relative antibacterial rate. The relative bacterial count percentage refers to the percentage of the surface bacterial count of the transparent sheet (substrate coated with the antibacterial antifog display coating composition) (i.e., N ₁ ) and the surface bacterial count of the substrate (not coated with the antibacterial antifog display coating composition) (i.e., N ₂ ) [i.e., (N ₁ /N ₂ )×100%], and the relative antibacterial rate evaluation is the difference between 100% and the relative bacterial count percentage [i.e., 100%-(N ₁ /N ₂ )×100%]. Experiments have shown that the relative bacterial count percentage of the transparent sheet is lower than 20%, or even lower than 10%, that is, the relative antibacterial rate can reach more than 80%, or even more than 90%.

The "anti-fogging property" mentioned herein refers to the fact that the surface of the transparent sheet is not easy to condense. The anti-fogging property can be evaluated by, for example, placing the transparent sheet in warm water (temperature of about 45°C to 55°C) for a period of time to evaluate whether the transparency of the transparent sheet changes and/or whether water drops form on the surface. Experimental results show that after placing the transparent sheet in water at 45°C to 55°C for 30 to 90 seconds, the transparent sheet still has high transparency and no water drops are attached to the surface.

The "waterproof property" mentioned herein means that the transparent sheet still has antibacterial and/or antifogging properties after being washed with water for many times, wherein the number of washing times is not limited, and can be, for example, 20 to 40 times, or 30 times. In other words, the transparent sheet formed by coating the antibacterial and antifogging display coating composition of the present invention can be washed with water for many times, which can not only extend the service life of the transparent sheet in actual use, but also prevent the antibacterial and/or antifogging properties of the transparent sheet from being deteriorated after being wiped with water.

It should be noted that, compared with unwashed transparent sheets, a dense hydration layer can be formed on the surface of washed transparent sheets, wherein the hydration layer can not only reduce the adhesion of bacteria, viruses and/or droplets containing them to the surface of the transparent sheet, so the antibacterial property of the transparent sheet increases instead of decreases after washing.

The transparent sheet has transparency, antibacterial, antifogging and waterproof properties, and can be applied to products such as automotive displays that are used in environments with large temperature differences.

It is additionally explained that the antibacterial antifogging display coating composition of the present invention is obtained by polymerizing a diionic polymer and a specific emulsifier, wherein the diionic polymer has an anchoring group (i.e., an AU group) that provides good coating properties, film-forming properties, and surface adhesion. Therefore, compared with a mixture obtained by mixing a diionic polymer and an emulsifier (without a polymerization step), the antibacterial antifogging display coating composition has better waterproof properties.

Secondly, for hydrophobic substrates with poor chemical reactivity such as PET, it is necessary to use a method that consumes more energy and/or chemicals (such as plasma treatment and/or alkaline treatment) for coating. Otherwise, the coating layer formed by simply coating by immersion treatment has poor adhesion. However, the above-mentioned specific emulsifier has a long chain (such as 11 to 17 carbons) of fatty acid hydrocarbons, which can be better anchored on the surface of the hydrophobic substrate, and the double bond can make the emulsifier and the diionic polymer polymerize, so the antibacterial antifog display coating composition is coated on the surface of the PET substrate by immersion treatment, and the coating layer formed can be better attached to the surface of the PET substrate.

Furthermore, compared to mixing the diionic polymer and the emulsifier into the substrate, a smaller amount of the diionic polymer and the emulsifier can be used by applying the coating to achieve better antibacterial and anti-fogging properties.

Several examples are used below to illustrate the application of the present invention, but they are not intended to limit the present invention. Those with ordinary knowledge in the technical field of the present invention can make various changes and modifications without departing from the spirit and scope of the present invention. Preparation of antibacterial and antifogging transparent sheets Preparation example

Dissolve an appropriate amount of diionic polymer in methanol to prepare a diionic polymer solution. Then, mix the diionic polymer solution (usage amount: 10 wt%), Tween ^® 80 (usage amount: 20 wt%), 2,2'-azobisisobutyronitrile (usage amount: 0.2 wt%) and a balance amount of water to obtain a starting material with a diionic polymer content of 2 wt%. The above diionic polymer is manufactured according to the method disclosed in patent number TW I496819 B (provided by Prebo Biotech Co., Ltd.), wherein the diionic polymer has a cationic group, and the cationic group has at least one double bond. Before use, sieve the diionic polymer with a sieve of 80 mesh. Next, the starting material was polymerized at 60°C to obtain a coating composition. The PET sheet was impregnated with the coating composition and dried at 120°C for 30 minutes to form a transparent sheet of the preparation example.

A PET sheet without coating composition was used as a comparison example. Evaluation method 1. Antibacterial property of transparent sheet

The antibacterial property test method of the transparent sheet of the preparation example and the preparation comparison example is briefly described as follows: First, the front and back sides of the transparent sheet are irradiated with ultraviolet light for 5 minutes each to sterilize the transparent sheet, wherein the front side of the transparent sheet refers to the side where the number of bacteria on the surface is sampled in the subsequent experiment. Then, the transparent sheet is placed face up in a culture dish containing bacterial solution and cultured at 37°C for 24 hours, wherein the bacterial concentration in the bacterial solution is 2.5×10 ⁵ colony-forming units (CFU)/mL to 10.0×10 ⁵ CFU/mL.

Then, the transparent sheet was taken out and the liquid visible to the naked eye was removed. The transparent sheet was then washed twice, and the liquid on the surface of the transparent sheet was drained. The washing process was to immerse the transparent sheet in phosphate buffered saline (PBS) for 5 minutes and then remove the PBS. Next, the front of the test piece was washed with 10 mL of soybean casein digest lecithin polysorbate 80 medium (SCDLP) containing lecithin and Tween ^® 80 to obtain a washing solution. 1 mL of the rinse solution was applied to the culture agar and cultured at 37°C for 24 hours. The percentage of the colony count of the culture agar of the preparation example (i.e., N ₁ ) and the colony count of the culture agar of the comparison example (i.e., N ₂ ) was calculated [i.e., (N ₁ /N ₂ )×100%] to obtain the relative bacterial count percentage of the preparation example, and the difference between 100% and the relative bacterial count percentage of the preparation example was calculated [i.e., 100%-(N ₁ /N ₂ )×100%] to obtain the relative antibacterial rate. It should be noted that the above-mentioned bacteria include Escherichia coli, and culture agar is well known to those skilled in the art to which the present invention belongs, and will not be described in detail here.

The above method can obtain the relative antibacterial rate of the preparation example and the preparation comparison example of the unwashed group, which is recorded in Table 1. As can be seen from Table 1, the relative antibacterial rate of the transparent sheet of the preparation example is greater than 80%, indicating that it has antibacterial properties. 2. Antibacterial properties of the transparent sheet after washing

The transparent sheets of the preparation examples and the preparation comparison examples were soaked in clean water for 30 times, and then the above antibacterial test was performed to obtain the relative antibacterial rates of the preparation examples and the preparation comparison examples in the water-washed group, and the results were recorded in Table 1. As shown in Table 1, compared with the unwashed group, the relative antibacterial rate of the preparation examples in the water-washed group increased (94.3%) instead of decreasing, indicating good antibacterial properties, proving that the transparent sheets of the preparation examples have waterproof properties. 3. Evaluation of the antifogging and transparency of transparent sheets

The transparency and antifogging properties of the transparent sheets of the preparation examples and the preparation comparison examples were evaluated. The transparency was evaluated by placing the transparent sheet on a paper with a white background and a pattern, and then observing through the transparent sheet whether the pattern was clear, whether the color saturation was reduced, and/or whether the white background was white. "○" means that the edge of the pattern was clear, the color saturation was unchanged, and the white background was white, and "╳" means that the edge of the pattern was blurred, the saturation of the pattern was reduced, and/or the white background was beige or yellow.

The anti-fogging property is evaluated by placing a cup of 50°C warm water on a white paper with a pattern on it, and then placing a transparent sheet on the cup for 1 minute. The clarity of the pattern on the paper is then observed through the transparent sheet, where "○" indicates a clear pattern, and "╳" indicates a blurred pattern.

As shown in Table 1, the transparency of the transparent sheets of the preparation example and the preparation comparative example is very good. Secondly, the transparent sheet of the preparation example has good antifogging property, but the transparent sheet of the preparation comparative example has poor antifogging property.

Table 1

As can be seen from the above, the antibacterial antifogging display coating composition of the present invention, its manufacturing method, transparent sheet and automotive display containing the same have the advantages that after the antibacterial antifogging display coating composition obtained by polymerizing the diionic polymer and the emulsifier is coated on the substrate, the formed transparent sheet has transparency, antibacterial, antifogging and waterproof properties, thereby ensuring that the automotive display can still be operated in the worst environment and extending the service life of the transparent sheet.

Although the present invention has been disclosed as above with several specific embodiments, various modifications, changes and substitutions may be made to the above disclosed contents, and it should be understood that, without departing from the spirit and scope of the present invention, certain features of the embodiments of the present invention will be adopted in certain situations but other features will not be used accordingly. Therefore, the spirit and scope of the claims of the present invention should not be limited to the above exemplary embodiments.

100: Manufacturing method 110,130,150: Steps

In order to make the above and other purposes, features, advantages and embodiments of the present invention more clearly understood, the attached drawings are described in detail as follows: [Figure 1] is a flow chart showing a method for manufacturing an antibacterial antifogging display coating composition according to one embodiment of the present invention.

100: Manufacturing method

110,130,150: Steps

Claims (10)

A method for manufacturing an antibacterial antifogging display coating composition comprises: providing a starting material, wherein the starting material comprises: a diionic polymer solution, comprising: a diionic polymer comprising a cationic group, and the cationic group has at least one double bond; and a solubilizing agent selected from a group consisting of a saturated physiological salt solution, methanol, ethanol, and the like, wherein based on a content of the starting material of 100 weight percent, a content of the diionic polymer of 1 weight percent to 5 weight percent, and a content of the solubilizing agent of 10 weight percent to 15 wt %; an emulsifier comprising at least one double bond, wherein based on the content of the starting material being 100 wt %, a content of the emulsifier is greater than 15 wt % to less than or equal to 25 wt %; a thermal polymerization initiator, wherein based on the content of the starting material being 100 wt %, a content of the thermal polymerization initiator is 0.1 wt % to 0.3 wt %; and a balance amount of water; and a polymerization step is performed on the starting material at 55°C to 65°C, thereby obtaining the antibacterial antifog display coating composition. The method for producing an antibacterial antifogging display coating composition as described in claim 1, wherein the diionic polymer comprises a block copolymer, a random copolymer or an alternating copolymer of AU _m BU _n described in formula (1),

AU represents a divalent methylene group having a substituent represented by -CR ¹ R ² - in formula (1), BU represents a divalent propylene group having a substituent represented by -CR ⁴ HCH ₂ CR ⁵ H- in formula (1), m represents an integer from 5 to 120, n represents an integer from 5 to 120, said R ¹ represents a linear, branched or cyclic alkyl group having 3 to 18 carbon atoms, an ester group [i.e., -COOR ^x , wherein R ^x represents a linear, branched or cyclic alkyl group having 3 to 18 carbon atoms, an aromatic group or a heteroaryl group having 5 to 12 carbon atoms], an aromatic group or a heteroaryl group having 5 to 12 carbon atoms, said R ² is a hydrogen atom or a methyl group, said R ⁴ is a carboxyl group, and said R ⁵ is said cationic group. A method for producing an antibacterial antifog display coating composition as described in claim 1 or 2, wherein the cationic group is N,N-dimethylammonium ethylamino vinyl, N,N-dimethylammonium propylamino vinyl, N,N-dimethylammonium butylamino vinyl or N,N-dimethylammonium pentylamino vinyl. A method for producing an antibacterial antifog display coating composition as described in claim 1, wherein the emulsifier comprises polyoxyethylene sorbitan monooleate and/or sorbitan monooleate. A method for producing an antibacterial antifogging display coating composition as described in claim 1, wherein the thermal polymerization initiator comprises 2,2'-azobisisobutyronitrile, 2,2'-azobis-2-methylbutyronitrile, 2,2'-azobis(2-methylpropionic acid) dimethyl ester and/or 4,4'-azobis-4-cyanovaleric acid. An antibacterial antifog display coating composition is produced by the manufacturing method described in any one of claim 1 to claim 7. An antibacterial and antifogging transparent sheet comprises a substrate and a coating layer, wherein the coating layer is disposed on a surface of the substrate, and the coating layer is formed using the antibacterial and antifogging display coating composition as described in claim 6. The antibacterial and anti-fogging transparent sheet as described in claim 7, wherein the transparent sheet does not fog after being placed in hot water at 45°C to 55°C for 30 seconds to 90 seconds. The antibacterial and antifogging transparent sheet as described in claim 7, wherein the relative antibacterial rate of one surface of the transparent sheet relative to one surface of the substrate is at least 80%. A vehicle display comprising a transparent sheet as described in any one of claim 7 to claim 9.

Images