JP6691206B2 - Water-repellent nanocoating agent having antibacterial activity for vacuum deposition and coating method using the same - Google Patents

Description

  The present invention relates to a functional coating agent that simultaneously realizes antibacterial properties and water / oil repellency, a method for producing the same, and a coating method using the same, and more specifically, hygienic use of smart devices such as touch-type displays. Therefore, the present invention relates to the production of a coating agent for imparting antibacterial properties to a water / oil repellent nano coating and a coating method using a vacuum deposition equipment.

  In the past, with the rapid increase in the usage rate of smart devices such as touch-type displays (smartphones, tablet PCs, smart watches, etc.), hygiene problems have become more serious, and interest in antibacterial activities is increasing. However, the anti-fingerprint coating currently applied does not have an antibacterial function, and there is an urgent need to develop a technology capable of imparting an antibacterial function to a touch screen window, which is a part that a user often touches.

  Currently, smartphone windows (touch screens) that are on sale have a thin film (tens of nm) of anti-fingerprint coating (or anti-contamination coating). Anti-fingerprint coatings use fluorinated compounds to impart water / oil repellency properties to the surface, which lowers surface energy and reduces fingerprints and external contaminants from the coated surface. It has the property of reducing the contact area, minimizing the adhesion of contaminants, and wiping off well even if it adheres.

  In order to form such a thin film, a coating method called "vacuum deposition" is almost used, but coating (surface modification) using vacuum deposition requires a target (coating agent) in a very short time. Since the coating proceeds by adding a high temperature heat source to (1), the coating quality is very good, the amount of chemical loss is small, and the nano-sized thin film coating that does not impair the optical properties is possible.

  Although many antibacterial coatings using inorganic substances (Ti series) are known in the market, most of them use the wet method, and among the domestic and overseas manufacturers of functional coating agents for vacuum deposition, There are no drug manufacturers that have the potential to do so. In the case of inorganic coating using vacuum evaporation, the ignition temperature is high, and the base material that can be coated is limited (the coating material is temperature sensitive-tempered glass, plastic, etc.), and also the material is inorganic or metallic coating. There is a problem that the surface of the product itself is discolored and the optical properties are impaired.

  Patent Document 1 relates to a technology for developing and utilizing a vacuum deposition system to which nanotechnology having an antibacterial action is applied. Here, an antibacterial action is realized by using grass materials (hari-giri, harunire, plum etc.). However, there is a problem that the antibacterial function is insufficient and the sustainability is difficult to be maintained, and the functions such as water / oil repellency and slip property are hard to be realized.

  Patent Document 2 discloses a technique of applying a coating agent containing an antibacterial drug to the outer surface of a television to form a film, thereby suppressing the growth of microorganisms. However, this also discloses water / oil repellency and slipperiness. There was a problem that it was difficult to realize such functionality.

  Patent Document 3 discloses an antibacterial material characterized by forming a zinc oxide thin film on a glass substrate, plastic or the like that can be used on the surface of a touch panel or a mobile phone by a method such as vacuum deposition or sputtering, and a manufacturing method thereof. Although disclosed, this also has a problem that it is difficult to realize functionality such as water / oil repellency and slip properties, and there is a problem that the optical properties are deteriorated by the metal thin film.

Korean Patent Application No. 10-2002-0066286 US Published Patent Publication No. US2011 / 0025933 Japanese Patent Application No. 2007-322624

  In order to solve the above-mentioned problems, the present invention is capable of simultaneously realizing water / oil repellency and antibacterial property by applying a vacuum deposition method, which is a touch-type display coating method. It provides a coating composition that can satisfy all the characteristics, has a soft touch feeling when using smart electronic devices and household appliances, and can easily remove contaminants such as fingerprints, and at the same time, it is safe from contamination with bacteria. I will try to use it with all my heart.

  In order to achieve the above object, the first aspect of the present invention provides a dry antibacterial coating agent for vacuum deposition, which comprises a polycondensation reaction product of a fluoropolymer and a silane compound having a functional presence / absence; and an antibacterial substance. To do.

  According to one embodiment of the first aspect of the present invention, the fluoropolymer and the functional organic / inorganic silane compound are polycondensed in the presence of the antibacterial substance.

  According to another embodiment of the first aspect of the present invention, the antibacterial substance is added to a polycondensation reaction product of the fluoropolymer and a silane compound with or without a functional group, dispersed and mixed with each other. .

  According to the second aspect of the present invention, a vacuum vapor deposition including: a) a step of producing a mixture containing a fluoropolymer, a silane compound with or without a functional compound, and b) a polycondensation reaction of the mixture. A method for producing a dry antibacterial coating agent for use is provided.

According to the third aspect of the present invention, i) a step of producing a mixture containing a fluoropolymer and a functional presence / absence silane compound; ii) a polycondensation reaction of the mixture; and ii) a polycondensation reaction Provided is a method for producing a dry antibacterial coating agent for vacuum vapor deposition, which comprises the steps of adding an antibacterial substance to a product, dispersing and mixing the antibacterial substance.

  According to a fourth aspect of the present invention, a method of coating a substrate, comprising: 1) providing a substrate to be coated; and 2) vacuum depositing the dry antibacterial coating agent of the present invention on the surface of the substrate. Will be provided.

  According to a fifth aspect of the present invention, there is provided a coated article having a vacuum deposition coating layer of the dry antibacterial coating agent of the present invention on the surface.

  The dry antibacterial coating agent for vacuum vapor deposition of the present invention has a surface water contact angle of 115 ° or more, exhibits excellent water repellency and oil repellency, and has anti-fingerprint (AF) resistance, durability and optical characteristics ( It has an excellent antibacterial function as well as excellent transmittance. In particular, it shows excellent abrasion resistance (in the eraser abrasion resistance test, the degree of contact angle change after the initial contact angle comparison test is within 15 °), shows an excellent antibacterial effect with an initial antibacterial activity of 99.9%, and glass. It can also be applied to various materials such as plastics and metals, and can be used as appropriate for surface coating applications such as smart devices with touch-type displays such as mobile phones and tablet PCs, home appliances and other electronic products, or their parts. You can

FIG. 1 is a diagram schematically showing a cross section of a substrate coated with the antibacterial coating agent of the present invention, the left side diagram shows an antimicrobial AF coating layer formed directly on the substrate, and the right side diagram shows An inorganic or oxide layer is interposed between the base material and the antibacterial AF coating layer. 3 is photographs showing antibacterial test results for (a) an uncoated sample, (b) an AF-coated sample containing no antibacterial agent, and (c) an antibacterial AF-coated sample coated with the antibacterial coating agent of the present invention.

Hereinafter, the present invention will be described in detail.
A first aspect of the present invention provides a dry antibacterial coating agent for vacuum vapor deposition, which contains a polycondensation reaction product of a fluoropolymer and a silane compound having a functional presence / absence, and an antibacterial substance.

  According to one embodiment of the first aspect of the present invention, the fluoropolymer and the functional organic / inorganic silane compound are polycondensed in the presence of the antibacterial substance.

  According to another embodiment of the first aspect of the present invention, the antibacterial substance is added to the polycondensation reaction product of the fluoropolymer and the functional presence / absence silane compound, dispersed and mixed with each other.

  The fluoropolymer usable in the present invention may be a perfluorinated polymer. Specifically, the fluorine-based polymer may be a perfluorinated polyether, a vinylidene fluoride polymer, a tetrafluoroethylene polymer, a hexafluoropropylene polymer, or a trichlorotrichloride. It may be selected from chlorotrifluoroethylene polymers and combinations thereof, preferably perfluorinated polyethers.

  The functional presence / absence silane compound usable in the present invention is a functional group that performs a polycondensation reaction with the fluoropolymer (for example, an amino group, a vinyl group, an epoxy group, an alkoxy group, a halogen group, a mercapto group, The presence / absence silane compound having one or more sulfide groups) may be used. Specifically, the functional presence / absence silane compound is aminopropyltriethoxysilane, aminopropyltrimethoxysilane, amino-methoxysilane, phenylaminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropyl. Trimethoxysilane, N- (β-aminoethyl) -γ-aminopropylmethyldimethoxysilane, γ-aminopropyltrimethoxysilane, γ-aminopropyldimethoxysilane, γ-aminopropyltriethoxysilane, γ-aminopropyldiethoxy Silane, vinyltriethoxysilane, vinyltrimethoxysilane, vinyltri (methoxyethoxy) silane, di-, tri- or tetraalkoxysilane, vinylmethoxysilane, vinyltrimethoxysilane, vinylepoxysilane, vinyltriepo Sisilane, 3-glycidoxypropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-methacryloxypropyltrimethoxysilane, chlorotrimethylsilane, trichloroethylsilane, trichloromethyl Silane, trichlorophenylsilane, trichlorovinylsilane, mercaptopropyltriethoxysilane, trifluoropropyltrimethoxysilane, bis (trimethoxysilylpropyl) amine, bis (3-triethoxysilylpropyl) tetrasulfide, bis (triethoxysilylpropyl) ) Disulfide, (methacryloxy) propyltrimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-glycy It may be selected from xypropylmethyldiethoxysilane, 3-glycidoxypropyldiethoxysilane, 3-glycidoxypropyltriethoxysilane, p-styryltrimethoxysilane and combinations thereof, preferably aminopropyltriethoxy. It may be silane or a combination containing it.

  The antibacterial substance that can be used in the present invention may be selected from natural materials or extracts thereof, antibacterial polymer compounds and combinations thereof.

  Examples of the natural material or an extract thereof include crab, shrimp shell or an extract thereof (eg, chitosan), green tea or an extract thereof (eg: catechin), Makidanchi or an extract thereof (eg: Paeonol, Paeoniflorin, Paeonolide, sitosterol, Gallicacid, Methylgallate, Tannicacid, Quercetin, etc.), grapefruit or its extract (eg Naringin), citral, licorice or its extract (eg flavonoid), cypress or its extract (eg) : Phytoncide), bamboo or its extract (eg polyphenols), germinated beans or its extract (eg glyceollins), Scutellaria or its extract (eg tyrosinase), horseradish or its extract (eg Isothiocyanate) ), Mustard or an extract thereof, hinokitiol, and combinations thereof. The extract can be produced by a known extraction method.

  Examples of the antibacterial polymer compound include aromatic or heterocyclic polymer, acrylic or methacrylic polymer, cationic conjugated polyelectrolyte, polysiloxane polymer, natural polymer mimicking polymer, and phenol or benzoic acid derivative. One or more polymer compounds selected from polymers, selected from ammonium bases, phosphonium bases, sulfonium bases or other onium bases attached to the linear or branched polymer chain, phenylamide groups and diguanide groups. And one or more functional groups.

  According to a preferred embodiment of the present invention, an antibacterial coating agent produced by using the above-mentioned natural material or its extract which is harmless to the human body as an antibacterial material and has stability and durability, or an antibacterial polymer compound. By coating on the glass surface, an excellent antibacterial effect with an initial antibacterial activity of 99.9% can be obtained.

  According to a more preferred embodiment of the present invention, chitosan, paeonol: 1- (2-hydroxy-4-methoxyphenyl) ethanone, or a combination thereof can be used as the antibacterial substance.

  In the antibacterial coating agent of the present invention, the content of the polycondensation reaction product of the fluoropolymer and the silane compound having a functional presence / absence is 50 to 99.9% by weight based on 100% by weight of the total dry weight of the coating agent. It is preferably 80 to 95% by weight and more preferably.

  In the antibacterial coating agent of the present invention, the content of the antibacterial substance is preferably 0.1 to 50% by weight, and more preferably 5 to 20% by weight, based on 100% by weight of the total dry weight of the coating agent.

  According to the second aspect of the present invention, a vacuum vapor deposition including: a) a step of producing a mixture containing a fluoropolymer, a silane compound with or without a functional compound, and b) a polycondensation reaction of the mixture. A method for producing a dry antibacterial coating agent for use is provided.

According to the third aspect of the present invention, i) a step of producing a mixture containing a fluoropolymer and a functional presence / absence silane compound; ii) a polycondensation reaction of the mixture; and iii) a polycondensation reaction Provided is a method for producing a dry antibacterial coating agent for vacuum vapor deposition, which comprises the steps of adding an antibacterial substance to a product, dispersing and mixing the antibacterial substance.

  There is no particular limitation on the method and equipment used for preparing the mixture, and a conventional reaction vessel or mixing equipment can be used. In the polycondensation reaction step, there are no particular restrictions on the polycondensation reaction conditions. For example, the polycondensation reaction may be carried out by a reflux reaction at a temperature of 100 to 200 ° C. under an inert gas (eg, argon, nitrogen). Further, in order to facilitate the polycondensation radical reaction, the reaction mixture may be irradiated with ultrasonic waves and / or UV during the reaction.

  The product of the polycondensation reaction may optionally undergo a stabilization step. There are no particular restrictions on the stabilizing conditions, and for example, the polycondensation reaction product can be left standing at room temperature for 24 hours for stabilization.

  According to a fourth aspect of the present invention, a method of coating a substrate, comprising: 1) providing a substrate to be coated; and 2) vacuum depositing the dry antibacterial coating agent of the present invention on the surface of the substrate. Will be provided.

  The substrate to be coated is not particularly limited as long as it can be coated by a vacuum deposition method, and substrates of various materials such as glass, plastic and metal can be coated by the method of the present invention.

The dry antibacterial coating agent may be directly vacuum-deposited on the surface of the substrate, or may be vacuum-deposited on a preformed inorganic or oxide (eg, SiO ₂ ) layer on the surface of the substrate.

  There is no particular limitation on the vacuum deposition method, and the conventional vacuum deposition method and equipment can be used. According to one embodiment of the present invention, the vacuum vapor deposition coating can be performed using a PVD (Physical Vapor Deposition) method using a 2050φ vacuum vapor deposition equipment (Electron-beam evaporation, Thermal evaporation, Thermal sputter, etc.). The advantages of vacuum deposition are that various materials can be easily applied to the coating, and there is almost no loss of coating chemicals, and a clean and uniform thin film can be formed. In addition, the structure of the entire apparatus is relatively simple, and the thermal and electrical complexity of the thin film manufacturing process is small, which is suitable for studying the physical properties of the film during thin film formation.

  According to a fifth aspect of the present invention, there is provided a coated article having a vacuum deposition coating layer of the dry antibacterial coating agent of the present invention on the surface.

  The article is a mobile device made of various materials such as glass, plastic and metal, a smart device having a touch-type display such as a tablet PC, a household appliance, a vending machine, a shared interactive information device, a touchable external electronic product, or a part thereof. It may be a smart device having a touch display or a part thereof.

  In the coating layer formed by vacuum-depositing the coating agent of the present invention, an antibacterial substance is arranged at the base of the coating layer, and the internal contamination, water and oil repellency, and surface lubrication are maintained while the life of the coating is maintained. In addition to exhibiting anti-fingerprint property and fingerprint resistance, it also exhibits antibacterial activity.

  Hereinafter, the present invention will be described in detail through examples. However, the present invention is not limited to these examples.

[Example]
Example 1
15 g of chitosan as an antibacterial substance was added to 50 g of perfluoropolyether, which is a fluoropolymer. 50 g of aminopropyltriethoxysilane, which is a silane compound for functional presence / absence, was added thereto, and a polycondensation reaction was carried out at a temperature of about 150 ° C. in an atmosphere of inert argon gas, and then the reaction product was cooled to room temperature. Stabilized for 24 hours to prepare a dry antibacterial coating agent.

Example 2
A dry antibacterial coating agent was prepared in the same manner as in Example 1, except that 8 g of paeonol was further added as an antibacterial substance.

Example 3
After adding 50 g of aminopropyltriethoxysilane to 50 g of perfluoropolyether and carrying out a polycondensation reaction at a temperature of about 150 ° C. under an atmosphere of inert argon gas, an antibacterial substance was added thereto. Then, 8 g of paeonol was added and uniformly dispersed and mixed to prepare a dry antibacterial coating agent.

Test Example 1: Evaluation of coating physical properties of the produced dry antibacterial coating agent Using the dry antibacterial coating agent produced in Examples 1 to 3 described above, an E / B (Electron-beam) evaporation method was used with 2050φ vacuum evaporation equipment. Coated with tempered glass. In order to make the coating smooth, the tempered glass was wet-cleaned with 10 sets of washer with a 5 wt% alkaline cleaner (cleaning agent for tempered glass) before the coating. The vacuum deposition conditions were as follows: initial etching: 300 seconds, SiO ₂ film thickness: 120Å, temperature: 80 ° C.

  The physical properties of the coated test piece were evaluated as follows.

(1) Method of measuring contact angle After coating, the contact angle of the coated surface was measured using a device for measuring contact angle. At the time of measuring the contact angle, the size of each water droplet was 3 μL, and in order to confirm the uniformity of the coating, the contact angle of 5 points was measured for each coated sample, and then the average was calculated.

(2) Abrasion resistance test After coating, an abrasion resistance test was performed to confirm the durability. A wear test was performed 1500 times using a wear-resistant eraser. As a result of the test, if the degree of change in the contact angle of the coated sample after the initial contact angle contrast test was within 15 °, it was determined to pass.

(3) Antibacterial activity confirmation test In order to confirm the initial antibacterial activity, Examples 1 and 2 were requested to the Korea Institute for Construction and Living Environment Test (KCL), and E. coli (ATCC 8739) and Staphylococcus aureus (ATCC 6538P) , Pseudomonas aeruginosa (ATCC 15442) was used to carry out an antibacterial test in accordance with JIS Z2801 standard. 400 μL of the diluted bacterial solution was inoculated on the surface of the coated sample, cultured for 24 hours in a constant temperature and constant humidity environment, and then desorbed to confirm the antibacterial result.

The results of the physical property evaluation are shown in Tables 1 to 3 below.
(Example 1)

(Example 2)

(Example 3)

Test Example 2: Comparison of antibacterial activity between uncoated sample and coating sample containing no antibacterial agent (a) uncoated sample (that is, tempered glass itself), (b) AF coated sample containing no antibacterial agent (ie, antibacterial agent) And a (c) antibacterial AF (anti-finger printing) coating sample (ie, the coating agent prepared in Example 1). The coated tempered glass sample) was subjected to an antibacterial activity confirmation test by measuring the contact angle as described above. The results are shown in Table 4 below and FIG.

Claims (15)

Polycondensation reaction product of fluorinated polymer and silane compound with or without functional properties; and antibacterial substance;
Including,
The fluorine-based polymer is selected from perfluorinated polyether, vinylidene fluoride polymer, tetrafluoroethylene polymer, hexafluoropropylene polymer, ethylene chloride trifluoride polymer and combinations thereof. Vacuum deposition dry antibacterial coating Agent. The dry antibacterial coating agent for vacuum deposition according to claim 1, wherein the fluorine-based polymer and the functional organic / inorganic silane compound are polycondensed in the presence of the antibacterial substance. The dry method for vacuum deposition according to claim 1, wherein the antibacterial substance is added to a polycondensation reaction product of the fluorine-based polymer and the silane compound for functional presence / absence, dispersed, and mixed with each other. Antibacterial coating agent. The functional presence / absence machine silane compound,
Aminopropyltriethoxysilane, aminopropyltrimethoxysilane, amino-methoxysilane, phenylaminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, N- (β-aminoethyl)- γ-aminopropylmethyldimethoxysilane, γ-aminopropyldimethoxysilane, γ-aminopropyldiethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, vinyltri (methoxyethoxy) silane, di-, tri- or tetraalkoxysilane, Vinylmethoxysilane, vinylepoxysilane, vinyltriepoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysila Amine, chlorotrimethylsilane, trichloroethylsilane, trichloromethylsilane, trichlorophenylsilane, trichlorovinylsilane, mercaptopropyltriethoxysilane, trifluoropropyltrimethoxysilane, bis (trimethoxysilylpropyl) amine, bis (3-triethoxysilyl) Propyl) tetrasulfide, bis (triethoxysilylpropyl) disulfide, (methacryloxy) propyltrimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, Selected from 3-glycidoxypropyldiethoxysilane, 3-glycidoxypropyltriethoxysilane, p-styryltrimethoxysilane and combinations thereof. The dry antibacterial coating agent for vacuum deposition according to claim 1, wherein: The dry antibacterial coating agent for vacuum vapor deposition according to claim 1, wherein the antibacterial substance is selected from natural materials or extracts thereof, antibacterial polymer compounds and combinations thereof. The dry antibacterial coating agent for vacuum deposition according to claim 1, wherein the antibacterial substance is chitosan, paeonol, or a combination thereof. a) a step of producing a mixture containing a fluoropolymer, a silane compound having or without a functional group, and an antibacterial substance; and b) a polycondensation reaction of the mixture;
Including,
The fluoropolymer is selected from perfluorinated polyethers, vinylidene fluoride polymers, tetrafluoroethylene polymers, hexafluoropropylene polymers, trifluorochloroethylene polymers and combinations thereof. Dry antibacterial for vacuum deposition. Method for producing coating agent. i) a step of producing a mixture containing a fluoropolymer and a silane compound with or without a functional group;
ii) subjecting the mixture to a polycondensation reaction; and iii) adding an antibacterial substance to the product of the polycondensation reaction, dispersing and mixing.
Including,
The fluorine-based polymer is selected from perfluorinated polyether, vinylidene fluoride polymer, tetrafluoroethylene polymer, hexafluoropropylene polymer, ethylene chloride trifluoride polymer and combinations thereof. Dry antibacterial for vacuum deposition. Method for producing coating agent. The fluoropolymer is selected from perfluorinated polyethers, vinylidene fluoride polymers, tetrafluoroethylene polymers, hexafluoropropylene polymers, chlorotrifluoroethylene polymers and combinations thereof,
Functional silane compounds include aminopropyltriethoxysilane, aminopropyltrimethoxysilane, amino-methoxysilane, phenylaminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, N -(Β-aminoethyl) -γ-aminopropylmethyldimethoxysilane, γ-aminopropyldimethoxysilane, γ-aminopropyldiethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, vinyltri (methoxyethoxy) silane, di- , Tri- or tetraalkoxysilane, vinylmethoxysilane, vinylepoxysilane, vinyltriepoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, γ-glycid Xypropyltriethoxysilane, chlorotrimethylsilane, trichloroethylsilane, trichloromethylsilane, trichlorophenylsilane, trichlorovinylsilane, mercaptopropyltriethoxysilane, trifluoropropyltrimethoxysilane, bis (trimethoxysilylpropyl) amine, bis (3 -Triethoxysilylpropyl) tetrasulfide, bis (triethoxysilylpropyl) disulfide, (methacryloxy) propyltrimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidoxypropylmethyl Diethoxysilane, 3-glycidoxypropyldiethoxysilane, 3-glycidoxypropyltriethoxysilane, p-styryltrimethoxysilane and the like It is selected from the group consisting of a combination of,
The method for producing a dry antibacterial coating agent for vacuum vapor deposition according to claim 7 or 8, wherein the antibacterial substance is selected from natural materials or extracts thereof, antibacterial polymer compounds and combinations thereof. The method for producing a dry antibacterial coating agent for vacuum deposition according to claim 7 or 8, wherein the polycondensation reaction is performed by a reflux reaction at a temperature of 100 to 200 ° C under an inert gas. Providing a 1) being coated substrate; a and 2) the substrate surface, the step of vacuum depositing a dry antimicrobial coating agent according to any one of claims 1 to 6;
Including,
The fluoropolymer is selected from perfluorinated polyethers, vinylidene fluoride polymers, tetrafluoroethylene polymers, hexafluoropropylene polymers, chlorotrifluoroethylene polymers and combinations thereof. . The method for coating a base material according to claim 11, wherein the base material is glass, plastic, or a metal material. The dry antibacterial coating agent is vacuum-deposited directly on the surface of the substrate, or is vacuum-deposited on an inorganic or oxide layer previously formed on the surface of the substrate. Method for coating a base material. A coated article having a vacuum deposition coating layer of the dry antibacterial coating agent according to any one of claims 1 to 6 on its surface. The coated article according to claim 14, wherein the article is a smart device having a touch-type display, a home appliance, a vending machine, a shared interactive information device, a touchable exterior electronic product, or a component thereof. .