TW202315920A - Coating material and coating method capable of having both the antibacterial effect and antiviral effect on the surface layer of an object to be coated for a long period of time - Google Patents

Abstract

Provided are a coating material and a coating method that can maintain both the antibacterial effect and antiviral effect on the surface layer of an object to be coated for a long period of time. The coating material is formed by adding 0.1~5% by mass of inorganic antibacterial agent and 0.1~20% by mass of inorganic antiviral agent to a base agent. The base agent is made of the following coating agent. The coating agent dissolves inorganic polysilazane and alkyl silicate condensates through an inert solvent, in which a total concentration of the inorganic polysilazane and the alkyl silicate condensates is 50 to 80% by mass.

Description

Coating material and coating method

field of invention The present invention relates to a coating material and a coating method, which are used to improve the properties of the surface layer of an object to be coated.

Background of the invention It is known to use various articles such as resin materials, metal materials, wood, rubber materials, etc. A film is used to improve the antibacterial property of the surface layer of the coating object and improve hygiene (see, for example, Patent Document 1). Some also apply a coating film on the surface of the object to be coated, so as to improve the virus resistance of the surface layer of the object to be coated.

prior art literature patent documents Patent Document 1: Japanese Patent Laid-Open No. 2004-168864 (page 3) Patent Document 2: Japanese Patent Laid-Open No. 2018-172306 (page 3)

Summary of the invention The problem to be solved by the invention However, in Patent Document 1, the coating material that is applied to the surface of the article by spraying or the like touches the surface and forms a film in a state where it enters into the minute unevenness on the surface of the article and temporarily fixes it, so that it will peel off over time. However, there will be a problem that the antibacterial effect cannot be sustained for a long time. In addition, in such a coating material of Patent Document 1, although a certain antibacterial effect can be obtained, the effect against viruses such as influenza (influenza), for example, cannot be expected.

In addition, if this antibacterial coating material is used together with the antiviral coating material of Patent Document 2, these coating materials may affect each other's film, so not only The effects of each cannot be expected, and the surface of the coated object may deteriorate. Especially in recent years, with the spread of the new coronavirus (covid-19), various objects that people will come into contact with, in addition to antibacterial effects on the surface, are also expected to improve properties so that they can continue to have antibacterial properties for a long time. Viral effect.

The present invention is completed by focusing on such problems, so the purpose is to provide a coating material and a coating method, which can have both antibacterial and antiviral effects on the surface of the coated object for a long time.

means to solve problems In order to solve the aforementioned problems, the coating material of the present invention is characterized in that: It is formed by adding 0.1-5% by mass of inorganic antibacterial agent and 0.1-20% by mass of inorganic antiviral agent to the base agent. In addition, the base agent is made of the following coating agent, which dissolves the condensate of inorganic polysilazane and alkyl silicate through a non-active solvent, and the total concentration of the two is 50-80% by mass. With this feature, the inorganic antibacterial agent and inorganic antiviral agent will use the glass coating film formed by the condensation product of inorganic polysilazane and alkyl silicate as the base material, and will be fixed on the film in a stable state Therefore, the coating object covered by the coating material can have both antibacterial and antiviral effects for a long time.

It is characterized in that it is further formed by adding an organic antibacterial and antiviral agent in a proportion of 0.1-10% by mass. With this feature, the antibacterial effect and antiviral effect of the coated object can be improved.

The coating method of the present invention is characterized in that it has: a coating step, which is to coat the coating material on the surface of the coated object, wherein The coating material is formed by adding 0.1-5% by mass of inorganic antibacterial agent and 0.1-20% by mass of inorganic antiviral agent to the base agent. In addition, the base agent is made of the following coating agent, which dissolves the inorganic polysilazane and the alkyl silicate condensate through the inactive solvent, and the total concentration of the two is 50-80% by mass. With this feature, a glass coating film formed of inorganic polysilazane and alkyl silicate condensate will be formed on the surface of the coated object. At the same time, the inorganic antibacterial agent and inorganic antiviral agent will be coated with glass. The coated film is used as the base material and fixed on its surface in a stable state, so the coated object can obtain both antibacterial and antiviral effects.

It is characterized in that the above-mentioned coating step is the following steps: On the surface of the above-mentioned coating object, a thin layer of coating film is generated, and the coating film is used as a base material and has _SiO as the main component. At the same time, the above-mentioned antibacterial agent and The antiviral agent is exposed on the surface of the coating film. By virtue of this feature, the antibacterial and antiviral agents are exposed on the surface of the coating film, whereby these antibacterial and antiviral agents will directly act on various bacteria and viruses, and can improve the antibacterial and antiviral properties for a long time. Effect. Furthermore, by forming a thin layer of coating film, it is possible to ensure the tracking property of the surface of the object to be coated.

It is characterized in that the aforementioned coating step is the following steps: coating the aforementioned coating material on the surface of the aforementioned coating target object with attached moisture, and making the components contained in the coating material adhere to the surface of the aforementioned coating target object The moisture in the chemical reaction produces a coating film on the surface of the aforementioned object to be coated. The coating film is the base material and contains _SiO2 as the main component. At the same time, the aforementioned antibacterial agent and the aforementioned antiviral agent are exposed to the aforementioned The concave portion of the surface layer of the aforementioned coating film formed by the chemical reaction. By virtue of this feature, the gas generated by the chemical reaction between the components contained in the coating material and the surface moisture of the coated object is discharged to form a concave portion on the surface layer of the coating film, so that the antibacterial agent and antiviral agent are exposed in the concave portion, thereby , these antibacterial and antiviral agents will directly act on various bacteria and viruses, and can improve the antibacterial and antiviral effects for a long time. Further, the smoothness of the surface layer can be improved by arranging the particles of the antibacterial agent and antiviral agent in the recesses of the surface layer of the coating film.

It is characterized in that before the above coating step, there is: a sterilization step, which is to disinfect the surface of the coating object. With this feature, a high-quality and durable coating film can be formed on the surface of the object to be coated after being cleaned by the sterilization step.

It is characterized in that there is a pretreatment step before the coating step, which is to make moisture adhere to the surface of the coating object. With this feature, moisture is attached to the surface of the object to be coated, thereby promoting the chemical reaction between the moisture and the components contained in the coating material, and a coating film can be quickly and firmly formed on the surface of the object to be coated.

Embodiment of the present invention form for carrying out the invention Hereinafter, the form of the coating material and coating method for implementing this invention is demonstrated with reference to FIGS. 1-5.

(coating solution) The coating solution 10 as the coating material of the present invention is mainly composed of a base agent 10A and an additive 10B added to the base agent 10A. First, the base agent 10A contains at least inorganic polysilazane and alkyl silicate condensates as raw materials. To be diluted.

The total concentration of the inorganic polysilazane and the alkyl silicate condensate is in the range of 50-80% by mass. In this embodiment, dibutyl ether is used as an inactive solvent for dissolution. More specifically, the inorganic polysilazane is added at a ratio of 0.1 to 5% by mass, and the remainder is an alkyl silicate condensate.

In more detail, the inorganic polysilazane of the present embodiment is perhydropolysilazane (perhydropolysilazane), which is a kind of Si-H bond, Si-N bond, NH bond and is composed of, for example, the following general formula (1 ) chain structure inorganic polymer composed of -(SiH ₂ -NH)- units.

[chemical formula 1]

In addition, the inorganic polysilazane is not limited to those having a chain structure, and may be a polymer having a ring structure, or may be a composite polymer having such a structure.

The alkyl silicate condensate is selected from, for example, tetramethyl orthosilicate (tetramethyl orthosilicate), tetraethyl orthosilicate (tetraethyl orthosilicate), tetra-n-propyl orthosilicate (tetra-n-propyl orthosilicate ), tetra-i-propyl orthosilicate, tetra-n-butyl orthosilicate, tetra-two-butyl orthosilicate (tetra- A condensate of one or more of sec-butyl orthosilicate), methyl polysilicate and ethyl polysilicate.

The inactive solvent is a solvent that is inactive for inorganic polysilazane and alkyl silicate condensates, preferably selected from dibutyl ether, dimethyl ether, diethyl ether, dipropyl ether, turpentine (turpentine), benzene , toluene, etc.

Additive 10B is to be added to the above-mentioned base agent 10A, and added: 0.01-10% by mass of inorganic antibacterial agent 21, 0.01-40% by mass of inorganic antiviral agent 22, and organic antibacterial and disease-resistant The poison 23 is 0.01 to 20% by mass. In addition, at least the inorganic antibacterial agent 21 and the inorganic antiviral agent 22 may be added, and the organic antibacterial antiviral agent 23 may not be added.

More specifically, the inorganic antibacterial agent 21 contains: silver oxide-zinc calcium phosphate (Ag ₂ O—Ca _α Zn _β Al _γ (PO ₄ ) ₆ ). In addition, the inorganic antiviral agent 22 contains at least a molybdenum compound or a silver compound. Also, the organic antibacterial and antiviral agent 23 contains diiodomethylparatolyl sulfone.

(Specification of coating material) Also, the coating liquid 10 of this embodiment is, for example, sealed in a container made of glass or resin, and used in the form of a predetermined amount of liquid, and the liquid is wetted with a cloth material not shown in the figure, and applied to the surface as a coating. The surface of various articles of the object, thereby forming a coating film. In addition, the application of the coating material is not limited thereto. For example, the following method can be adopted: sealing the non-woven fabric or the like impregnated with the coating solution in advance in the bag and unsealing the bag when used; or, It does not matter if the coating liquid is sprayed onto the surface of the object to be coated in the form of a spray.

(Coating method of coating film) The coating solution 10 is applied or sprayed onto the surface 2 of the object 1 to be coated, and a single-layer or multiple-layer coating film 15, 35 is formed by chemically reacting with moisture. In addition, the coating film 15 shown in FIG. 2 is layered at a micro-level. Moreover, the coating film 35 shown in FIG. 3 is to be layered with a nano-level (nano level) thin layer. In terms of its film thickness, it is preferably a coating film of 1 nm to 500 nm, more preferably 5 nm to 200 nm. Cover film to form layer.

First, a sterilization step is performed prior to the coating step of the coating film 15, 35, and the surface 2 of the article 1 is sterilized. The sterilizing step is to attach the sterilizing solution diluted with hypochlorous acid to the surface 2 of the article 1 through spraying or non-woven cloth soaked with the sterilizing solution; the hypochlorous acid has antibacterial and antiviral effects in addition to the sterilizing effect . By sterilizing in this way, the surface 2 of the article 1 can be made into a clean state, the coating film 15, 35 can be easily coated on it, and the coating film 15, 35 with high quality and high durability that is not easy to peel off can be produced. .

In addition, water (H ₂ O) such as purified water may be attached to the surface 2 of the article 1 as a pre-step after the above-mentioned sterilization step and before the coating step. By doing this, the chemical reaction between the moisture attached to the surface 2 of the article 1 and the components contained in the coating liquid 10 can be promoted, and the coating films 15 and 35 can be rapidly and firmly formed on the surface 2 of the article 1 .

(coating object) As for the covering object, it can be applied to various articles composed of resin materials, metal materials, wood, rubber materials, leather, etc.; or it can also be fixed objects such as daily utensils. For example, it is suitable for the following people Items with a high chance of contact as covering objects: the surface of the mobile phone user terminal or remote control unit, the table top or drawer of a table or table, tableware, purses or wallets and other personal belongings, door handles or handrails, train or bus rings, Materials for construction or temporary installation, etc.

(Formation mechanism of coating film) Next, the formation mechanism of the coating film 15, 35 of this invention is demonstrated. As shown in Figure 1(a), as the object of coating, for example, the surface 2 of an article 1 made of metal materials, although there are few, will still adhere to multiple moisture due to condensation or moisture in the air. 6, 6... (water droplets). When the coating solution 10 is coated or sprayed into a thin film on the surface 2 of the article 1, the inorganic polysilazane constituting the base agent 10A in the coating solution 10, that is, perhydropolysilazane, will interact with the air. The moisture (H ₂ 0) in the chemical reaction produces a coating layer with an inorganic structure on the surface 2 of the article 1 . In addition, although a small amount of gas (NH ₃ , H ₂ ) is incidentally generated during the above chemical reaction, these gases will of course not remain on the surface 2 of the article 1 but will volatilize into the atmosphere.

That is, as shown in FIG. 1( b), the coating solution 10 reacts chemically with the moisture contained in the air on the surface layer 10a in contact with the air, whereby the by-products of the coating films 15, 35 are hydrogen or Gases such as ammonia volatilize from the surface layer, and the coating layer 11 is formed on the surface side of the coating film 15, 35 at the same time.

In addition, the coating solution 10 coated on the surface 2 of the article 1 will be present on the surface as an end with the moisture 6, 6 ... (water droplets) attached to the surface 2 on the back surface 10b that contacts the surface 2 of the article 1. The hydroxyl group -OH in 2 reacts chemically, whereby gas such as hydrogen or ammonia rises in the coating layer and volatilizes from the surface layer, and at the same time, the coating layer 12 is formed on the back side of the coating films 15 and 35 .

In this way, first, the coating layers 11 and 12 are respectively formed on the surface layer 10a and the back layer 10b of the coating liquid 10 . Then, the coating layer 11 will expand from the surface layer side to the back layer side, and at the same time, the coating layer 12 will expand from the back layer side to the surface layer side, whereby the middle coating layer will be gradually generated, and finally the coating film 15 will be formed. , 35 straddle: the surface layer 14a in contact with the external air and the back layer 14b in contact with the surface 2 of the article 1 .

As shown in Figure 1(c), before the coating film 15, 35 is coated, as long as no special surface treatment such as mirror finishing is performed on the surface 2 of the article 1, small scratches or the like caused by the manufacturing steps will be formed. Many microscopic levels of fine unevenness 3 . While coating the surface 2 of the article 1, the coating liquid 10 enters the concave-convex portion 3 and hardens as described above in this state, whereby the coating material that enters the concave-convex portion 3 and hardens acts as a The anchoring portion 17 plays a role, so the coating film 15, 35 will be more firmly attached to the surface 2 of the article 1 .

Also, as shown in Figures 2 and 3, many additives 10B contained in the coating liquid 10 are mixed in the surface layer and inside of the coating film 15, 35 in the form of microscopic particles, namely: inorganic antibacterial agent 21, inorganic antibacterial agent The virus agent 22 and the organic antibacterial and antiviral agent 23 are partly exposed on the surface layer 14a as described later.

The coating film 15 shown in FIG. 2 is formed at a microscopic level. In another embodiment, the coating film 35 shown in FIG. 3 is formed to be thinner than the above-mentioned coating film 15 at the nanometer level. Therefore, although it is a glass coating film, it is still rich in flexibility, and it also interacts with the anchoring effect brought by the above-mentioned anchoring portion 17, even if the surface 2 of the object to be covered is such as a cloth that will deform. The coating property of the coating film 35 can be maintained following the deformation of the surface 2 without peeling or the like.

In addition, when the surface 2 of the article 1 is a smooth surface that hardly has the above-mentioned concavo-convex portion 3, as a pre-treatment for coating the coating film 15, the surface 2 of the article 1 can also be roughened by a file. Concave-convex portions 3 are actively formed on the surface 2, so that the anchoring effect of the coating film 15 can be obtained.

It is preferable to form the concave-convex portion 3 with an arithmetic average roughness ranging from about 1 to 500 μm on the surface 2 of the article 1 by performing the roughening treatment, thereby improving the anchoring effect of the coating film 15 .

After the roughening treatment, use an air jet such as an air gun to carry out cleaning treatment to blow away the metal powder produced on the surface 2 of the article 1 due to file application, etc. Furthermore, after this cleaning process, it is left for a predetermined period of time so that condensation or the like occurs on the surface 2 of the article 1 and naturally occurring moisture adheres thereto.

Also, at this time, after the surface 2 of the article 1 is roughened and cleaned, the roughened surface 2 of the article 1 on which the concave-convex portion 3 is formed is a pretreatment step that is earlier than the coating step. Moisture can also be positively attached by means of imparting moisture such as spraying, and then coated with the coating film 15; by doing this, the moisture attached to the surface 2 of the article 1 and the contact with the surface 2 of the article 1 can be promoted. The coating liquid 10 produces a chemical reaction. In addition, moisture may be attached by means of imparting moisture without roughening the surface 2 of the article 1 in particular.

(shape of coating layer of coating film) As shown in Figure 2, the coating film 15 coated on the surface 2 of the article 1 has unevenness 16 formed on the surface of the by-product, that is, the residue of the position after the gas bubbles volatilize. Concave-convex shapes are formed on the layer 14a at the nanometer level. More specifically, it can be inferred that many bubbles of hydrogen, ammonia, etc. are generated due to the above-mentioned chemical reaction. The influence of the surface tension generated on the surface layer 14a and the influence of the initial hardening timing of the surface layer 14a accompanied by the chemical reaction interact with each other to form a nanoscale concave portion 16b and convex portion 16a on the smooth surface. Concave-convex part 16. In addition, in FIG. 1 and FIG. 2 , the concavo-convex portion 16 is distorted in size from the actual size; in FIG. 3 , the concavo-convex portion 16 is omitted.

Also, compared with the concave-convex portion 3 just formed on the surface 2 of the article 1 before coating, the concave-convex portion 16 formed on the surface of the coating film 15, 35 has a smaller depth and height of the concave-convex portion 16, so by applying the coating film 15 and 35 are coated on the surface 2 of the object 1, and the surface after coating will be smoother than before coating.

And, of course, the above-mentioned by-products, that is, gas, are uniformly generated on the surface of the coating film 15, so the number of the coating film 15 per unit area, the depth of the concave portion, and the height of the convex portion will not vary as far as the pits (dimple) 16 are concerned. Inhomogeneity occurs and uniform formation occurs.

Again, regarding the coating film 15,35 coated on the surface 2 of the article 1, the pit 16 formed by the coating film 15,35 of the single-layer coating situation shown in Figure 4 (a), and Figure 4 ( b) After comparing the pits 26 formed by the coating films 15 and 35 of the several layers of smearing shown, it is confirmed that the depth and height of the pits 26 of the several layers of smearing are relatively small. It is presumed that this is because the unevenness of the pits 16 at the time of single-layer coating is flattened by applying the coating film several times, and relatively smooth pits 26 are formed.

Further, on the surface layer 14a, the additive B mixed in the coating film 15, 35 in the form of fine particles is fixed, that is: the inorganic antibacterial agent 21, the inorganic antiviral agent 22, and the organic antibacterial and antiviral agent 23, and its It is fixed with a part of the surface exposed to the outside.

More specifically, as mentioned above, the perhydropolysilazane constituting the base agent 10A of the coating liquid 10 chemically reacts with moisture (H ₂ 0) to generate gases (NH ₃ , H ₂ ). Such gas will rise along with the surrounding additive B particles in the coating liquid 10 . Therefore, as shown in FIG. 2, a part of the additive B in the coating liquid 10 will gather near the surface layer 14a of the coating film 15, especially on the concave-convex portion 16 formed by gas volatilization on the surface layer 14a. .

Part of the fine particles of the additive B is arranged on the surface layer 14a in a concave shape that complements the concave portion 16b. By doing so, these inorganic antibacterial agents 21, inorganic antiviral agents 22, and organic antibacterial and antiviral agents 23 will directly act on various bacteria and viruses, and can improve the antibacterial and antiviral effects for a long time. In addition, the concave portion 16b is partially buried with the additive B, so that the smoothness of the surface layer 14a can be improved.

Moreover, another part of the additive B microparticles|fine-particles is arrange|positioned in the surface layer 14a so that it may be embedded in the inside of the convex part 16a. In this way, when the convex portion 16a forming a protruding shape on the surface layer 14a of the coating film 15 is partially scraped along with the use of the coated article 1, the additive B embedded in the convex portion 16a It will be exposed on the surface, so it can continue to have antibacterial and antiviral effects for a long time.

Also, the coating films 15, 35 formed by coating the coating solution 10 of the present invention on the surface 2 of the article 1 have a substrate made of inorganic components, and the additives, namely antibacterial agent 21 and antiviral agent 22, are also Inorganic components, therefore, do not dissolve or vaporize on the substrate or outside, and can maintain the film state without deteriorating for a long time.

In addition, as another embodiment, the coating film 35 shown in FIG. 3 is formed to be thinner than the above-mentioned coating film 15 at the nanometer level; more specifically, the film thickness is about 1 to 500 nm. In contrast, the particle diameter of the inorganic antibacterial agent 21 is approximately 0.8 to 1 μm, the particle diameter of the inorganic antiviral agent 22 is approximately 3 μm, and the particle diameter of the organic antibacterial and antiviral agent 23 is approximately 1 μm, all of which are thicker than the film thickness of the coating film 35 Also big size. Therefore, these particles are exposed with their upper parts exposed outside the surface layer 34 a of the coating film 35 . By doing so, these inorganic antibacterial agents 21, inorganic antiviral agents 22, and organic antibacterial and antiviral agents 23 will directly act on various bacteria and viruses, and can improve the antibacterial and antiviral effects for a long time. In addition, by forming the coating film 35 in a thin layer, even when the surface 2 of the article 1 has flexibility, it is possible to ensure traceability to its shape.

Furthermore, part of the particles of the additive B and the part below it fits into the concave-convex portion 3 formed on the surface 2 when the coating liquid 10 is applied, and the base agent A hardens in this state, so it can last for a long time without peeling off. Has antibacterial and antiviral effects.

(Evaluation method of antibacterial and antiviral effects) As far as the evaluation method of the antibacterial and antiviral effects of the coating film is concerned, for the surface 2 coated with the coating film 15, 35, the ATP (adenosine triphosphate) sampling inspection is performed over time, and the evaluation is performed based on the value of ATP . The so-called ATP here is a chemical substance that exists as the energy source of all organisms on the earth; the existence of ATP can confirm that there is evidence of bacteria, viruses themselves or traces of bacteria and viruses. That is, the larger the value in the ATP sampling inspection, the higher the degree of contamination of the surface (high risk of infection); the smaller the value in the ATP sampling inspection, the lower the degree of contamination of the surface (low risk of infection). ).

The ATP sampling check is explained. The ATP sampling inspection is to expose the following test materials to the normal temperature environment in the same laboratory, carry out ATP sampling on the surface of each test material every 1 day (every 24 hours), and compare the ATP detection number; The test materials are: the glass test material (A) coated with the coating material of the present invention on the surface, and the test material (B) coated with other coating materials described later on the surface for comparison. ~(E), and the tested material without any coating material (no mark). In addition, the laboratory is in an environment where many people come and go, which may be invaded by bacteria and viruses. At the beginning of the ATP sampling operation on the surface, the front end of the cotton rod-shaped detection wire is wiped on the surface of the test material under certain conditions, and then the front end is inserted into a special ATP detector not shown in the figure to detect adhesion. ATP value on the front end.

The test material (B) is coated with a coating material composed of only the base agent 10A without adding the additive 10B contained in the coating liquid 10 of the present invention. Next, the test material (C) is coated with a coating material that is an inorganic glass coating material for sporting goods and the like. In addition, the test material (D) is coated with an inorganic glass coating material for mobile phone terminals and the like. In addition, the test material (E) is coated with the following coating material, and the coating material is an inorganic ceramic coating material.

(Evaluation of antibacterial and antiviral effects) The results of the ATP sampling inspection are shown in Figure 5. The test material (A) coated with the coating material of the present invention has almost no increase in ATP over time, and it has been confirmed that it continues to have the highest antibacterial and antiviral effect compared to other test materials. This is supposed to be the inorganic antibacterial agent 21, inorganic antiviral agent 22, and organic antibacterial antiviral agent fixed under the state exposed on the surface layer 14a of the coating film 15, 35 as shown in Figures 2 and 3 23. It will directly contact bacteria and viruses that will be attached to the surface layer 14a with droplets and dust flying over in the external air, and play a role to prevent it from staying, so the surface layer 14a is always kept clean.

Also, in the test material (B), although ATP increased with time, the rate of increase was only a small amount. This is inferred because: there is no above-mentioned inorganic antibacterial agent 21, inorganic antiviral agent 22, and organic antibacterial antiviral agent 23, and the base agent 10A containing inorganic polysilazane will form the surface layer of the coated film as The smooth surface mainly composed of _SiO2 , that is, the smoothness becomes higher than the surface of the test material before coating, so it can prevent bacteria and viruses from staying to a certain extent.

In addition, the ATP of the test material (C) increased significantly with time, and the rate of increase was higher than that of the test material (B). This is speculated because: different from the above-mentioned test material (A), since the inorganic antibacterial agent or antiviral agent is not exposed on the surface of the coated film, it lacks antibacterial and virus resistance.

In the same way, the ATP of the test material (D) and the test material (E) increased significantly over time, and the increase rate was also higher than that of the test material (B). This is presumed because: the same as the test material (C), the inorganic antibacterial agent or antiviral agent is not exposed on the surface of the coated film, so it cannot produce antibacterial and virus resistance.

(Effect of the invention in this case) As explained above, the coating solution 10 (coating material) of the present invention is formed by adding 0.1 to 5% by mass of the inorganic antibacterial agent 21 and 0.1 to 20% by mass of the inorganic antiviral agent 22 to the base agent 10A. ; and the following coating agent is used as the base agent 10A, the coating agent is dissolved through an inactive solvent: inorganic polysilazane and alkyl silicate condensate and the total of the two is 50-80% by mass Concentration; thus, the inorganic antibacterial agent 21 and the inorganic antiviral agent 22 will use the glass coating film generated by the condensation product of inorganic polysilazane and alkyl silicate as the base material, and will be fixed on the glass in a stable state. The surface layer 14a of the coating film 15, 35, therefore, the article 1 (coating object) covered by the coating liquid 10 can have both antibacterial effect and antiviral effect for a long time.

In addition, the coating liquid 10 is further formed by adding an organic antibacterial and antiviral agent 23 at a ratio of 0.1 to 10% by mass, whereby both the antibacterial and antiviral effects of the article 1 can be improved.

Also, with regard to the step of coating the coating liquid 10, the coating liquid 10 is coated on the surface 2 of the article 1 with attached moisture, so that the components contained in the coating liquid 10 and the surface 2 of the article 1 are attached. Moisture produces a chemical reaction, whereby the coating film 15, 35 is formed on the surface 2 of the article 1, which is used as the base material and contains _SiO2 as the main component. At the same time, the antibacterial agent 21 and antiviral agent 22 are exposed to the aforementioned chemical reaction. The concave portion 16b of the surface layer 14a of the formed coating film 15, 35, whereby these antibacterial agents 21 and antiviral agents 22 will directly act on various bacteria and viruses, and the antibacterial and antiviral effects can be improved for a long time. In addition, compared to a coating liquid composed of only a base agent without additives, the particles of the antibacterial agent 21 and antiviral agent 22 are arranged in the concave portion 16b of the surface layer 14a of the coating film 15, 35, thereby enabling embedding The recess 16b thus improves the smoothness of the surface layer 14a.

Although the embodiments of the present invention have been described above with the drawings, the specific configuration is not limited to these embodiments, and changes or additions are included in the present invention without departing from the gist of the present invention.

For example, in the foregoing embodiments, the coating liquid 10 has added the inorganic antibacterial agent 21 and the inorganic antiviral agent 22 respectively, but it is not limited thereto. If both antibacterial and antiviral effects can be obtained with one material, then Only this material can be added.

1: Item (cloaking object) 10: Coating solution (coating material) 10A: base agent 10B: Additives 10a: surface layer 10b: Dorsal layer 11, 12: coating layer 14a: surface layer 14b: Dorsal layer 15, 35: coated film, coated film 16: concave and convex part, pit 16a: convex part 16b: concave part 17: Anchoring part 2: surface 21: Inorganic antibacterial agent 22: Inorganic antiviral agent 23:Organic antibacterial and antiviral agent 3: uneven part 6: Moisture 26: Pit

Figure 1(a)~(c) are cross-sectional views showing the mechanism of the coating film formed on the article in the time series in the embodiment. Fig. 2 is an enlarged view of the area surrounded by the dot circle in Fig. 1(c). Fig. 3 is an enlarged view of the area surrounded by the dotted line in Fig. 1(c) in another embodiment. Figure 4 is a picture taken by AFM measurement of the surface of a metal material covered with a coating film; (a) is a picture of one layer of coating film, and (b) is a picture of three layers of coating film. Figure 5 is a table showing the results of the ATP sampling test.

1: Item (cloaking object)

14a: surface layer

14b: Dorsal layer

15: Coating film

16a: convex part

16b: concave part

17: Anchoring part

2: surface

21: Inorganic antibacterial agent

22: Inorganic antiviral agent

23:Organic antibacterial and antiviral agent

3: uneven part

Claims (7)

A coating material, characterized in that: it is formed by adding 0.1 to 5% by mass of inorganic antibacterial agent and 0.1 to 20% by mass of inorganic antiviral agent to base agent, and the base agent is formed by the following coating agent In this way, the coating agent dissolves the condensate of inorganic polysilazane and alkyl silicate through a non-active solvent, and the total concentration of the two is 50-80% by mass. Such as the coating material of claim 1, which is further formed by adding an organic antibacterial and antiviral agent in a proportion of 0.1 to 10% by mass. A kind of coating method, it is characterized in that having: coating step, is to coat the surface of coated object with coating material, wherein this coating material is made of inorganic antibacterial agent 0.1～5% by mass, inorganic antiviral agent 0.1% The proportion of ~20% by mass is added to the base agent, and the base agent is made of the following coating agent, which is dissolved by an inactive solvent to dissolve the condensate of inorganic polysilazane and alkyl silicate And the total concentration of both is 50-80% by mass. The coating method according to claim 3, wherein the aforementioned coating step is a step of: generating a thin layer of coating film on the surface of the aforementioned coating object, the coating film is used as a base material and contains _SiO2 as the main component , at the same time, the aforementioned antibacterial agent and the aforementioned antiviral agent are exposed on the surface layer of the aforementioned coating film. The coating method according to claim 3, wherein the aforementioned coating step is the following steps: coating the aforementioned coating material on the surface of the aforementioned coating object with attached moisture, and making the ingredients contained in the coating material and the aforementioned The moisture attached to the surface of the object to be coated produces a chemical reaction, whereby a coating film is formed on the surface of the object to be coated, and the coating film is used as a base material with _SiO as the main component, and at the same time, the antibacterial agent And the aforementioned antiviral agent is exposed in the concave portion of the surface layer of the aforementioned coating film formed by the aforementioned chemical reaction. The coating method according to any one of Claims 3 to 5, which includes, before the coating step, a sterilization step of sterilizing the surface of the object to be coated. The coating method according to any one of claims 3 to 6, which includes, before the coating step, a pretreatment step of making moisture adhere to the surface of the coating object.

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