Antibacterial coating composition and method for manufacturing antibacterial product using same

Abstract

The present invention relates to an antibacterial coating composition and, more specifically, to an antibacterial coating composition having excellent solubility of substances in the composition, capable of preventing discoloration of the composition, and exhibiting an excellent antibacterial effect, and to a method for manufacturing an antibacterial product using same.

Description

Antibacterial coating composition and method for manufacturing an antibacterial product using the same

[0001] The present invention relates to an antibacterial coating composition, and more particularly, to an antibacterial coating composition having excellent solubility of substances in the composition, preventing discoloration of the composition, and exhibiting excellent antibacterial effects, and a method for manufacturing an antibacterial product using the same.

[0002]

[0003] As interest in hygiene and the prevention of infections caused by various bacteria, fungi, and viruses has increased recently, the preference for products with antibacterial properties for products that come into direct contact with people in daily life is also increasing.

[0004] In this regard, antibacterial functions are increasingly required for various IT devices, such as smartphones, laptops, and monitors, which frequently come into direct contact with the human body. Consequently, the development of products that impart antibacterial properties to resins used in IT devices or films manufactured using such resins is accelerating.

[0005] However, in order to add antibacterial function to products applied to IT devices, etc., it is very important that the optical and mechanical properties of the final manufactured film, etc. are not deteriorated even if antibacterial materials are added to resins, etc.

[0006] Inorganic antibacterial agents, such as silver nanoparticles, zeolites, calcium phosphate, zirconium phosphate, and silica gel, which are commonly used as antibacterial materials, have had difficulty maintaining their original physical properties, including optical and mechanical properties, when applied to the various products mentioned above. Furthermore, safety has also emerged as a critical factor due to concerns about the human toxicity of antibacterial materials.

[0007] In addition, in the case of conventional antibacterial resin compositions, there were problems such as poor solubility of substances in the composition, or even if the solubility was excellent, discoloration of the composition could not be prevented, or antibacterial properties were poor.

[0008]

[0009] Accordingly, there is an urgent need to develop an antibacterial composition that has excellent solubility of substances in the composition, can prevent discoloration of the composition, and exhibits excellent antibacterial effects.

[0010]

[0011] The purpose of the present invention is to provide an antibacterial coating composition having excellent solubility of substances in the composition, preventing discoloration of the composition, and exhibiting excellent antibacterial effects, and a method for producing an antibacterial product using the same.

[0012] Another object of the present invention is to provide an antibacterial coating composition capable of minimizing the influence on the physical properties of products to which it is applied, such as an antibacterial film.

[0013] Another object of the present invention is to provide an antibacterial coating composition that not only has excellent antibacterial properties but also exhibits excellent effects in at least one of permeability, turbidity, color, hardness, and adhesion, and a method for manufacturing an antibacterial product using the same.

[0014] Other objects and advantages of the present invention will become more apparent from the detailed description, claims and drawings below.

[0015]

[0016] To solve the above-described problem, the present invention provides an antibacterial coating composition comprising an antibacterial agent containing silver, a paint containing a viscosity modifier, and an additive.

[0017] According to one embodiment of the present invention, the antibacterial agent may include a solvent and a silver salt.

[0018] Additionally, the paint may include an oligomer of the urethane acrylate series having a 6-functional group.

[0019] In addition, the viscosity modifier may be at least one selected from the group consisting of HDDA (1,6-Hecanediol Diacrylate), DPGDA (Dipropylene glycol Diacrylate), DPPA (Dipentaerythritol pentacrylate), DPHA (Dipentaerythritol hexaacrylate), IBOA (Isobornyl acrylate), TPGDA (Tripropylene glycol Diacrylate), PETA (Pentaerythritol Triacrylate), PETTA (Pentaerythritol Tetraacrylate), and TMPTA (Trimethylolpropane Triacrylate).

[0020] Additionally, the additive may include at least one selected from the group consisting of an antioxidant, a UV absorber, a light stabilizer, an antioxidant, and a pH regulator.

[0021] Additionally, the additive may be at least one of a phenylformamidine-based UV absorber, a phenol-based antioxidant, and a phosphite-based antioxidant.

[0022] Additionally, the antibacterial agent, paint and additive may be included in an amount of 0.5 to 1.5 wt%: 97 to 99 wt%: 0.5 to 1.5 wt%.

[0023] Additionally, the antibacterial power evaluated according to the following experimental method 1 may be 99.9% or higher.

[0024] [Experimental Method 1]

[0025] An antibacterial coating composition was applied to a PET film with an average thickness of 5 ㎛ using a bar coater, prebaked at a temperature of 75°C, and then a film-shaped specimen was manufactured through UV curing. The antibacterial activity of the specimen was measured against E. coli using the JIS Z 2801 method.

[0026] Additionally, the haze evaluated according to the following experimental method 2 may be 3% or less, and the discoloration (△E*) may be 5 or less.

[0027] [Experimental Method 2]

[0028] For antibacterial coating compositions, haze and discoloration were measured using a spectrophotometer according to JIS K 7105.

[0029]

[0030] In addition, the present invention provides a method for manufacturing an antibacterial product, comprising a first step of manufacturing an antibacterial preparation by adding an antibacterial agent containing silver to a solvent, a second step of manufacturing an antibacterial coating composition by mixing the antibacterial preparation, a paint containing a viscosity modifier, and an additive, and a third step of coating the antibacterial coating composition on a product.

[0031]

[0032] According to one embodiment of the present invention, the antibacterial coating composition according to the present invention and the method for manufacturing an antibacterial product using the same have excellent solubility of substances in the composition, can prevent discoloration of the composition, and have excellent antibacterial properties.

[0033] According to one embodiment of the present invention, the antibacterial coating composition according to the present invention can impart high antibacterial power and maintain high optical properties and / or mechanical properties while minimizing the influence on the physical properties of a product to which it is applied, such as an antibacterial film.

[0034] According to one embodiment of the present invention, the antibacterial coating composition of the present invention and the method for manufacturing an antibacterial product using the same can efficiently manufacture an antibacterial product having excellent antibacterial activity as well as at least one of transmittance, turbidity, color, hardness, and adhesion at minimal cost.

[0035]

[0036] FIG. 1 is a drawing schematically showing a method for manufacturing an antibacterial product by coating an antibacterial coating composition according to one embodiment of the present invention.

[0037] Figure 2 is a photograph showing an evaluation of discoloration of an antibacterial coating composition according to one embodiment of the present invention.

[0038] Figure 3 is a photograph showing an evaluation of discoloration and antibacterial properties of an antibacterial coating composition according to one embodiment of the present invention.

[0039] Figure 4 is a photograph showing an evaluation of discoloration of an antibacterial coating composition according to one embodiment of the present invention.

[0040] Figure 5 is a photograph showing an evaluation of discoloration of an antibacterial coating composition according to one embodiment of the present invention.

[0041] Figure 6 is a photograph showing an evaluation of discoloration of an antibacterial coating composition according to one embodiment of the present invention.

[0042] Figure 7 is a photograph showing an evaluation of discoloration and antibacterial properties of an antibacterial coating composition according to one embodiment of the present invention.

[0043] Figure 8 is a photograph showing an evaluation of material solubility and discoloration of an antibacterial coating composition according to one embodiment of the present invention.

[0044] Figure 9 is a photograph showing the evaluation of material solubility of an antibacterial coating composition according to one embodiment of the present invention.

[0045] Figure 10 is a photograph showing an evaluation of discoloration and antibacterial properties of an antibacterial coating composition according to one embodiment of the present invention.

[0046]

[0047] The purpose, specific advantages and novel features of the present disclosure will become more apparent from the following detailed description and examples taken in conjunction with the accompanying drawings.

[0048] Prior to this, the terms or words used in this specification and claims should not be interpreted in their usual or dictionary meanings, but should be interpreted in their meanings and concepts that are consistent with the technical idea of ​​the present disclosure based on the principle that the inventor can appropriately define the concept of the term to explain his or her own invention in the best way.

[0049] In this specification, when a component, such as a layer, portion, or substrate, is described as being "on," "connected to," or "coupled to" another component, it may be directly "on," "connected to," or "coupled to" the other component, and one or more other components may be interposed between the two components. Conversely, when a component is described as being "directly on," "directly connected to," or "directly coupled to" another component, no other components may be interposed between the two components.

[0050] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the present disclosure. Singular expressions include plural expressions unless the context clearly dictates otherwise.

[0051] In this specification, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0052] In this specification, when a part is said to "include" a component, this does not exclude other components, unless otherwise specifically stated, but rather implies the inclusion of other components. Furthermore, throughout this specification, the term "on" means located above or below the target part, and does not necessarily mean located above the direction of gravity.

[0053] The present disclosure may be subject to various modifications and embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present disclosure to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present disclosure. In describing the present disclosure, detailed descriptions of related known technologies will be omitted if they are deemed to obscure the gist of the present disclosure.

[0054] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the attached drawings. In describing with reference to the attached drawings, identical or corresponding components are assigned the same drawing numbers, and redundant descriptions thereof will be omitted.

[0055]

[0056] According to one aspect, the antibacterial coating composition of the present invention is implemented by including an antibacterial agent including silver (Ag), a paint including a viscosity modifier, and an additive.

[0057] Hereinafter, each component included in the antibacterial coating composition of the present invention will be described.

[0058] First, the antibacterial agent containing the above silver is described.

[0059] The above antibacterial agent may include a solvent and a silver salt, and it may be more advantageous to achieve the purpose of the present invention to include a silver salt, preferably silver perchlorate.

[0060] The above antibacterial formulation addresses the issues of low long-term storage stability and heat resistance of existing antibacterial formulations. It exhibits excellent long-term storage stability and heat resistance, exhibits excellent antibacterial activity even in small quantities, and minimizes the impact on the physical properties of products to which it is applied, such as antibacterial films. Furthermore, the above antibacterial formulation is safe, as it does not contain safety-regulated substances such as zeolite or quaternary ammonium salts.

[0061] Although not limited thereto, the antibacterial agent may not produce sediment even after being stored at room temperature for more than two weeks. Conventional antibacterial agents have a problem in that brown sediment is produced after two weeks at room temperature, resulting in low long-term storage properties and making it difficult to store and / or manage the antibacterial agent. However, the antibacterial agent of the present invention may have excellent long-term storage properties or long-term durability as it does not produce sediment even when stored at room temperature for more than two weeks, more than three weeks, more than four weeks, or even more than three months.

[0062] Although not limited thereto, the antibacterial agent may be characterized by not discoloring after storage at a temperature of 150°C or higher for 5 minutes or longer. Conventional antibacterial agents begin to discolor after storage at a temperature of 150°C or higher for 10 minutes or longer, at a temperature of 200°C or higher for 10 minutes or longer, or at a temperature of 250°C or higher for 5 minutes or longer, and thus, problems such as discoloration may occur during the manufacture of an antibacterial coating composition requiring high-temperature processing and / or when applying an antibacterial coating to a product due to low heat resistance. However, the antibacterial agent of the present invention may have excellent heat resistance because discoloration and precipitation are not observed even after storage at 150°C or higher, 200°C or higher, or 250°C or higher for 5 minutes or longer, or 10 minutes or longer.

[0063] Although not limited thereto, the silver salt may be included in an amount of 0.15 parts by weight or more based on the total weight of the antibacterial preparation. Although not limited thereto, the silver salt may be included in an amount of 0.15 parts by weight or more based on the total weight of the antibacterial preparation, which may be suitable for enhancing antibacterial activity while drastically improving long-term storage properties and heat resistance, and minimizing the influence on the physical properties of the product to which it is applied. It may be more suitable for it to be included in an amount of 0.15 to 5 parts by weight, it may be more suitable for it to be included in an amount of 0.2 to 3 parts by weight, it may be even more suitable for it to be included in an amount of 0.2 to 2 parts by weight, and it may be even more suitable for it to be included in an amount of 0.3 to 1 part by weight in terms of antibacterial activity. Although not limited thereto, when the silver salt is included in an amount of less than 0.15 parts by weight based on the total weight of the antibacterial preparation, the antibacterial activity may be significantly reduced, and when it is included in an amount of more than 5 parts by weight, the physical properties of the product to which it is applied, particularly turbidity, may be significantly reduced.

[0064] Although not limited thereto, the solvent may be included in an amount of 95 to 99.75 parts by weight based on the total weight of the antibacterial agent to enhance the antibacterial activity of the product to which it is applied, while improving the solubility of substances, preventing discoloration of the composition, and minimizing the influence on the physical properties of the product to which it is applied.

[0065] Although not limited thereto, the solvent may be one or more of alcohol and water, and may be appropriately selected and used depending on the applied antibacterial coating composition and product requiring antibacterial properties. The product to which the solvent is applied is not limited thereto, but is at least one selected from Ethanol, Isopropyl Alcohol, Propylene Glycol Monomethyl Ether Acetate, Methyl Isobutyl Ketone, Deionized Water (DI Water), Ethylene Glycol, Acetone, 1-Propanol, Propylene Glycol, Propylene Glycol Methyl Ether, Methyl Ethyl Ketone, Diethyl Ether, Dichloromethane, N,N-Dimethylformamide, Toluene, Acetylene, and Ethylene Dichloride. It may be suitable for improving antibacterial properties while improving long-term storage properties and heat resistance, improving solubility of substances, preventing discoloration of the composition, and minimizing influence on the properties of the product to which it is applied, and at least one selected from ethanol and isopropyl alcohol may be more suitable, and ethanol may be more suitable.

[0066]

[0067] Next, a paint containing the above viscosity modifier is described.

[0068] The above viscosity modifier controls the viscosity of the antibacterial coating composition, thereby enabling uniform coating when applying the product, and also improves the dispersion of materials in the composition, thereby improving the uniformity of the physical properties of the coating layer.

[0069] The viscosity modifier may be any viscosity modifier commonly used in the art without limitation, but preferably may include at least one selected from the group consisting of HDDA (1,6-Hecanediol Diacrylate), DPGDA (Dipropylene glycol Diacrylate), DPPA (Dipentaerythritol pentacrylate), DPHA (Dipentaerythritol hexaacrylate), IBOA (Isobornyl acrylate), TPGDA (Tripropylene glycol Diacrylate), PETA (Pentaerythritol Triacrylate), PETTA (Pentaerythritol Tetraacrylate), and TMPTA (Trimethylolpropane Triacrylate), and more preferably, it may be more advantageous to achieve the purpose of the present invention to include at least one of DPPA (Dipentaerythritol pentacrylate) and DPHA (Dipentaerythritol hexaacrylate).

[0070] Meanwhile, according to one embodiment of the present invention, the paint may further include an acrylate-based oligomer.

[0071] The above acrylate oligomer may be any known acrylate oligomer without limitation as long as it does not lower the solubility of the substances in the composition, does not cause discoloration of the composition, and does not lower the antibacterial properties, but preferably, an aliphatic hexafunctional acrylate monomer, an aromatic difunctional acrylate monomer, an aliphatic multifunctional acrylate monomer, an aliphatic difunctional diacrylate monomer, an aliphatic difunctional acrylate monomer, an aliphatic difunctional methacrylate monomer, an aliphatic trifunctional acrylate monomer, an aliphatic trifunctional methacrylate monomer, an aromatic It may include at least one of an aromatic trifunctional acrylate monomer, an aromatic trifunctional methacrylate monomer, an aliphatic tetrafunctional acrylate monomer, an aliphatic hexafunctional acrylate monomer, and an aliphatic tetrafunctional methacrylate monomer, and more preferably, an oligomer of the urethane acrylate series having a hexafunctional group is included, which has good coating properties and adhesion when determining the suitability of the antibacterial agent.It can be more advantageous in that it can minimize the influence of changes in physical properties without affecting optical properties, does not reduce the solubility of substances in the composition, does not cause discoloration of the composition, and does not reduce antibacterial properties.

[0072] In this case, the paint may contain the acrylate oligomer and the viscosity modifier in a weight ratio of 1:0.1 to 0.6, and preferably in a weight ratio of 1:0.15 to 0.55. If the weight ratio of the acrylate oligomer and the viscosity modifier is less than 1:0.1, uniform coating may not be possible when applying the product, or the dispersion of materials in the composition may not be good, which may lower the uniformity of the physical properties of the coating layer, and if the weight ratio exceeds 1:0.6, the antibacterial property may be relatively lowered.

[0073]

[0074] Next, the above additives will be described.

[0075] The above additive performs the function of preventing discoloration of the composition without reducing the antibacterial properties and solubility of substances of the antibacterial coating composition according to the present invention.

[0076] The above additive may be used without limitation as long as it is an additive that can be commonly used in the art, but preferably, it may include at least one selected from the group consisting of an antioxidant, a UV absorber, a light stabilizer, an antioxidant, and a pH regulator, more preferably, it may include at least one of an antioxidant, a UV absorber, and an antioxidant, and most preferably, it may include all of an antioxidant, a UV absorber, and an antioxidant.

[0077] In this case, the antioxidant may be used without limitation as long as it is an antioxidant that can prevent discoloration of the composition without lowering the antibacterial property and solubility of the substances of the antibacterial coating composition according to the present invention, and preferably, it may include at least one of a phenol-based antioxidant, an amine-based antioxidant, and a phosphite-based antioxidant, and more preferably, it may be more advantageous in terms of preventing discoloration of the composition without lowering the antibacterial property and solubility of the substances of the antibacterial coating composition when including a phenol-based antioxidant.

[0078] In addition, in this case, the UV absorber can be used without limitation as long as it is an antioxidant that can prevent discoloration of the composition without lowering the antibacterial property and the solubility of the substances of the antibacterial coating composition according to the present invention, and preferably, it can include at least one of a triazine-based UV absorber, a benzophenone-based UV absorber, a benzoate-based UV absorber, a benzotriazole-based UV absorber, and a phenylformamidine-based UV absorber, and more preferably, it can include a phenylformamidine-based UV absorber, which can be more advantageous in terms of preventing discoloration of the composition without lowering the antibacterial property and the solubility of the substances of the antibacterial coating composition.

[0079] And, in this case, the antioxidant can be used without limitation as long as it is an antioxidant that can prevent discoloration of the composition without lowering the antibacterial property and solubility of the substances of the antibacterial coating composition according to the present invention, and preferably, it can be more advantageous in terms of preventing discoloration of the composition without lowering the antibacterial property and solubility of the substances of the antibacterial coating composition when including a phosphite-based antioxidant.

[0080] Meanwhile, preferably, the additive may include the antioxidant, and most preferably, it may include a phosphite-based antioxidant.

[0081]

[0082] Meanwhile, the antibacterial coating composition according to the present invention may contain the antibacterial agent, paint, and additive in an amount of 0.5 to 1.5 wt%: 97 to 99 wt%: 0.5 to 1.5 wt%, and preferably 0.7 to 1.3 wt%: 97.4 to 98.6 wt%: 0.7 to 1.3 wt%. If the antibacterial agent is less than 0.5 wt%, the antibacterial property may be reduced, and if it exceeds 1.5 wt%, discoloration may occur in the composition, and in the case of a transparent film requiring optical properties such as light transmittance, the physical properties may be reduced. In addition, if the paint is less than 97 wt%, the physical properties may be reduced in the case of a transparent film requiring optical properties such as light transmittance, and if it exceeds 99 wt%, discoloration may occur in the composition, and the antibacterial property may be reduced. In addition, if the additive is less than 0.5 wt%, discoloration may occur in the composition, and if it exceeds 1.5 wt%, antibacterial properties may be relatively reduced.

[0083]

[0084] Meanwhile, the antibacterial coating composition according to the present invention may have an antibacterial power of 99.9% or more, and preferably 99.95% or more, as evaluated according to the following experimental method 1.

[0085] [Experimental Method 1]

[0086] An antibacterial coating composition was applied to a PET film with an average thickness of 5 ㎛ using a bar coater, prebaked at a temperature of 75°C, and then a film-shaped specimen was manufactured through UV curing. The antibacterial activity of the specimen was measured against E. coli using the JIS Z 2801 method.

[0087] Accordingly, the solubility of the substances in the composition is excellent, discoloration of the composition can be prevented, and excellent antibacterial effects can be exhibited simultaneously.

[0088] In addition, the antibacterial coating composition according to the present invention may have a haze of 3% or less and a discoloration degree (△E*) of 5 or less as evaluated according to the following experimental method 2, preferably a haze of 2% or less and a discoloration degree (△E*) of 4 or less, more preferably a haze of 1% or less and a discoloration degree (△E*) of 3.5 or less, and even more preferably a haze of 0.5% or less and a discoloration degree (△E*) of 3.1 or less.

[0089] [Experimental Method 2]

[0090] For antibacterial coating compositions, haze and discoloration were measured using a spectrophotometer according to JIS K 7105.

[0091] Accordingly, the solubility of the substances in the composition is excellent, discoloration of the composition can be prevented, and excellent antibacterial effects can be exhibited simultaneously.

[0092]

[0093] The antibacterial coating composition of this invention can be used for coating various products. As described above, the antibacterial coating composition can be manufactured to maximize antibacterial activity on surfaces that come into contact with the human body, while minimizing the impact on the physical properties of the product to which it is applied, and minimizing manufacturing costs.

[0094] Although not limited thereto, the antibacterial coating composition of the present disclosure may be used for coating transparent films. As described above, the antibacterial coating composition of the present disclosure can drastically improve antibacterial power when coated on the surface of a product, and at the same time, has excellent solubility of substances in the composition and can prevent discoloration of the composition, thereby minimizing the influence on optical properties such as light transmittance and / or turbidity of the product to which it is applied. Therefore, it can be particularly suitable for transparent films in which optical properties such as light transmittance and turbidity are very important, and particularly for transparent films applied to IT devices.

[0095]

[0096] FIG. 1 is a drawing schematically showing a method for manufacturing an antibacterial product by coating an antibacterial coating composition according to one embodiment of the present invention.

[0097] Meanwhile, the present invention provides a method for manufacturing an antibacterial product, comprising a first step of manufacturing an antibacterial agent by adding an antibacterial agent containing silver to a solvent, a second step of manufacturing an antibacterial coating composition by mixing the antibacterial agent, a paint containing a viscosity modifier, and an additive, and a third step of coating the antibacterial coating composition on a product.

[0098] Hereinafter, in the description of the method for manufacturing an antibacterial product, the same content as that described for the antibacterial coating composition described above will be omitted and described.

[0099] First, the first step of manufacturing the above antibacterial preparation will be described.

[0100] The above antibacterial preparation is prepared by adding an antibacterial agent containing silver to a solvent, and at this time, the antibacterial preparation can be prepared by stirring for a predetermined period of time, and the stirring time can be 1 hour or less, 30 seconds to 30 minutes, 30 seconds to 20 minutes, 30 seconds to 10 minutes, 30 seconds to 5 minutes, or 30 seconds to 3 minutes.

[0101] At this time, if the antibacterial agent containing silver includes silver perchlorate as a silver salt, the silver perchlorate dissolves in most solvents within 1 minute, so that the present invention can maximize the solubility of the silver salt during the manufacture of the antibacterial agent, thereby minimizing the stirring time, thereby dramatically improving the manufacturing productivity. Therefore, the present invention includes, but does not exclude, the manufacture of the antibacterial agent by adding and dissolving the silver salt in a solvent without stirring.

[0102]

[0103] Next, the second step of manufacturing an antibacterial coating composition is described.

[0104] As described above, when manufacturing the antibacterial product and the antibacterial coating composition coated thereon according to the present invention, the antibacterial agent is first prepared and then mixed with the paint and additives. If the components of the antibacterial agent are directly mixed with the paint and additives, dispersibility may be significantly reduced, resulting in the applied product not exhibiting uniform physical properties or deteriorating physical properties.

[0105]

[0106] Next, the third step of coating the antibacterial coating composition on the product is described.

[0107] The coating method described above can utilize various known coating methods, such as spin coating. While not limited thereto, a coating thickness of 2 μm or more may be appropriate, and a coating thickness of 4 μm or more may be appropriate for enhancing the antibacterial activity of the product to which it is applied while minimizing the impact on the physical properties of the product to which it is applied. However, since curling may occur depending on the substrate being coated, selection may be made based on the intended use.

[0108]

[0109] Although not limited thereto, the product to which the present disclosure is applied may be a transparent film. As described above, the antibacterial coating composition of the present disclosure can dramatically improve antibacterial properties when coated on the surface of a product while simultaneously minimizing the impact on optical properties such as light transmittance and / or turbidity of the product to which it is applied. Therefore, it is particularly suitable for transparent films in which optical properties such as light transmittance and turbidity are very important, and in particular, transparent films applied to IT devices.

[0110]

[0111] The present invention will be described in more detail through the following examples, but the following examples do not limit the scope of the present invention, and should be interpreted as helping to understand the present invention.

[0112]

[0113] [Example]

[0114] <Examples 1-1 to 1-8: Additives_Antioxidants>

[0115] An antibacterial agent was prepared by adding 0.3 parts by weight of silver perchlorate as a silver salt to ethanol (concentration 1 wt%) as a solvent and stirring for 10 minutes. Afterwards, 98 wt% of a paint containing a urethane acrylate-based oligomer having six functional groups as an acrylate monomer and DPPA (Dipentaerythritol pentacrylate) as a viscosity modifier in a weight ratio of 1:0.35, 1 wt% of the above-mentioned antibacterial agent, and Benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-,C7-9 branched alkyl ester (primary phenol type) (Example 1-1), Triethylene glycol-bis-3-(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate (primary phenol type) (Example 1-2), Octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate (primary phenol type) (Example 1-3), An antibacterial coating composition was prepared by adding 1 wt% of 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl) benzene (primary phenol system) (Example 1-4), Isooctyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate (primary phenol system) (Example 1-5), Tris(3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate (primary phenol system) (Example 1-6), a mixture of butylated&octylated diphenylamine (primary amine system) (Example 1-7), and Tris(2,4-di-tert-butylphenyl) phosphite (secondary phosphate system) (Example 1-8).

[0116]

[0117] Experimental Example 1

[0118] For the antibacterial coating compositions according to Examples 1-1 to 1-8, the following items were evaluated and shown in Table 1 and Figure 1.

[0119] 1. Discoloration evaluation

[0120] For the antibacterial coating compositions according to Examples 1-1 to 1-8, whether discoloration occurred one day after mixing the additives was visually evaluated (Figs. 2a to 2h: photographs taken one day after mixing the additives of each of Examples 1-1 to 1-8).

[0121] As can be seen in Fig. 2, it can be confirmed that discoloration occurred in Examples 1-1 to 1-8 according to the present invention.

[0122] 2. Haze and discoloration evaluation

[0123] For the antibacterial coating composition according to Example 1-1, haze and discoloration were measured using a spectrophotometer in accordance with JIS K 7105.

[0124] As a result, it was confirmed that the haze was high and the degree of discoloration was high, with a haze of 3.12%, a*: 0.93, b*: 12.62, and △E*: 12.58.

[0125]

[0126] <Examples 2-1 to 2-4>

[0127] An antibacterial coating composition was manufactured in the same manner as in Example 1-1, but instead of the antioxidant as an additive, 1,3-Benzenediol, 4-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl]~ (Triazine series) (Example 2-1), Benzophenone (Benzophenone series) (Example 2-2), 2-Ethylhexyl 4-(dimethylamino)benzoate (Example 2-3), and 1H-Benzotriazole (Benzotriazole series) (Example 2-4) were used as UV absorbers at 1 wt% to manufacture the composition.

[0128]

[0129] Experimental Example 2

[0130] For the antibacterial coating compositions according to Examples 2-1 to 2-4, the following items were evaluated and shown in Fig. 3.

[0131] 1. Discoloration evaluation

[0132] Regarding the antibacterial coating compositions according to Examples 2-1 to 2-4, whether discoloration occurred one day after mixing the additives was visually evaluated (Figs. 3a to 3d: photographs taken one day after mixing the additives of Examples 2-1 to 2-4, respectively).

[0133] As can be seen in Fig. 3, it can be confirmed that discoloration occurred in Examples 2-1 to 2-3 according to the present invention. In contrast, it can be seen that no discoloration occurred in Example 4.

[0134] 2. Antibacterial activity evaluation

[0135] For the antibacterial coating composition according to Example 2-4, the antibacterial coating solvent-free composition was applied to a PET film using a bar coater to an average thickness of 5 μm, prebaked at a temperature of 75°C, and then a film-shaped specimen was manufactured through UV curing. The antibacterial activity of the specimen was measured against E. coli using the JIS Z 2801 method (Figs. 2e and 2f: antibacterial activity evaluation photos when no additive was included and in Example 2-4, respectively).

[0136] As can be seen in Fig. 3, Example 4 was able to prevent discoloration as described above, but it was confirmed that the antibacterial power was reduced.

[0137]

[0138] <Examples 3-1 to 3-3>

[0139] An antibacterial coating composition was manufactured in the same manner as in Example 1-1, but instead of the antioxidant as an additive, Bis(1,2,2,6,6-pentamethyl-4-piperidyl) Sebacate (Example 3-1), Bis(1,2,2,6,6-tetramethyl-4-piperidyl) Sebacate (Example 3-2), and Dimethyl succinated polymer with 4-Hydroxy-2,2,6,6-tetramethyl-1-piperidine-ethanol (Example 3-3) were used as a light stabilizer, respectively, to manufacture an antibacterial coating composition.

[0140]

[0141] Experimental Example 3

[0142] For the antibacterial coating compositions according to Examples 3-1 to 3-3, the following items were evaluated and shown in Fig. 4.

[0143] 1. Discoloration evaluation

[0144] For the antibacterial coating compositions according to Examples 3-1 to 3-3, whether discoloration occurred 4 hours after mixing the additives was visually evaluated (Figs. 4a to 4c: photographs taken 4 hours after mixing the additives of Examples 3-1 to 3-3, respectively).

[0145] As can be seen in Fig. 4, it can be confirmed that discoloration occurred in Examples 3-1 to 3-3 according to the present invention. At this time, it can be seen that in the case of the light stabilizer, discoloration occurs even faster (4 hours).

[0146] 2. Haze and discoloration evaluation

[0147] For the antibacterial coating composition according to Example 3-1, haze and discoloration were measured using a spectrophotometer in accordance with JIS K 7105.

[0148] As a result, it was confirmed that the haze was excessively high with a haze of 5.21%, a*: -0.17, b*: 1.59, and △E*: 1.46.

[0149]

[0150] <Examples 4-1 to 4-4>

[0151] An antibacterial coating composition was manufactured in the same manner as in Example 1-1, but the content of the paint was changed to 97 wt%, and 1 wt% of an antioxidant and 1 wt% of a light stabilizer were mixed as additives.

[0152] - Example 4-1: Antioxidant Benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-, C7-9 branched alkyl ester (primary phenol system) and light stabilizer Bis(1,2,2,6,6-pentamethyl-4-piperidyl) Sebacate

[0153] - Example 4-2: Antioxidant Triethylene glycol-bis-3-(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate (primary phenol system) and light stabilizer Bis(1,2,2,6,6-pentamethyl-4-piperidyl) Sebacate

[0154] - Example 4-3: Antioxidant Isooctyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate (primary phenol system) and light stabilizer Bis(1,2,2,6,6-pentamethyl-4-piperidyl) Sebacate

[0155] - Example 4-4: Antioxidant Tris(3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate (primary phenol system) and light stabilizer Bis(1,2,2,6,6-pentamethyl-4-piperidyl) Sebacate

[0156]

[0157] Experimental Example 4

[0158] For the antibacterial coating compositions according to Examples 4-1 to 4-4, the following items were evaluated and shown in Figure 5.

[0159] 1. Discoloration evaluation

[0160] For the antibacterial coating compositions according to Examples 4-1 to 4-4, whether discoloration occurred one day after mixing the additives was visually evaluated (Figs. 5a to 5d: photographs taken one day after mixing the additives of each of Examples 4-1 to 4-4).

[0161] As can be seen in Fig. 5, it can be confirmed that discoloration occurred in Examples 4-1 to 4-4 according to the present invention.

[0162]

[0163] <Examples 5-1 to 5-2>

[0164] An antibacterial coating composition was manufactured in the same manner as in Example 1-1, but the content of the paint was changed to 97 wt%, and instead of 1 wt% of an antioxidant as an additive, 1 wt% of a UV absorber and 1 wt% of a light stabilizer were mixed to manufacture an antibacterial coating composition.

[0165] - Example 5-1: UV absorber 1,3-Benzenediol, 4-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl]~ (Triazine series) and light stabilizer Bis(1,2,2,6,6-pentamethyl-4-piperidyl) Sebacate

[0166] - Example 5-2: UV absorber 1,3-Benzenediol, 4-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl]~ (Triazine series) and light stabilizer Bis(1,2,2,6,6-tetramethyl-4-piperidyl) Sebacate

[0167]

[0168] Experimental Example 5

[0169] For the antibacterial coating compositions according to Examples 5-1 and 5-2, the following items were evaluated and shown in Fig. 6.

[0170] 1. Discoloration evaluation

[0171] Regarding the antibacterial coating compositions according to Examples 5-1 and 5-2, whether discoloration occurred one day after mixing the additives was visually evaluated (Figs. 6a and 6b: photographs taken one day after mixing the additives of each of Examples 5-1 and 5-2).

[0172] As can be seen in Fig. 6, it can be confirmed that discoloration occurred in Examples 5-1 to 5-2 according to the present invention.

[0173]

[0174] <Examples 6-1 to 6-2>

[0175] An antibacterial coating composition was manufactured in the same manner as in Example 1-1, but instead of the antioxidant, a UV absorber, a phenol-based antioxidant, and a phosphite-based antioxidant were added in a weight ratio of 1:1:1, totaling 1 wt%, to manufacture the antibacterial coating composition.

[0176] - Example 6-1: UV absorber N-(4-Ethoxycarbonylphenyl)-N'-Methyl-N' Phenylformamidine (Phenylformamidine type), antioxidant Benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-,C7-9 branched alkyl ester, and antioxidant Diisodecyl pentaerythritol diphosphate (Phosphite type)

[0177] - Example 6-2: UV absorber 1H-Benzotriazole (Benzotriazole type), antioxidant Benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-,C7-9 branched alkyl ester, and antioxidant Diisodecyl pentaerythritol diphosphate (Phosphite type)

[0178]

[0179] Experimental Example 6

[0180] For the antibacterial coating compositions according to Examples 6-1 and 6-2, the following items were evaluated and shown in Fig. 7.

[0181] 1. Discoloration evaluation

[0182] Regarding the antibacterial coating compositions according to Examples 6-1 and 6-2, whether discoloration occurred 3 days after mixing the additives was visually evaluated (Figs. 7a and 7b: photographs taken 3 days after mixing the additives of Examples 6-1 and 6-2, respectively).

[0183] As can be seen in Fig. 7, it can be seen that no discoloration occurred in Examples 6-1 to 6-2 according to the present invention.

[0184] 2. Antibacterial activity evaluation

[0185] For the antibacterial coating compositions according to Examples 6-1 and 6-2, the antibacterial coating solvent-free composition was applied to a PET film with an average thickness of 5 μm using a bar coater, prebaked at a temperature of 75°C, and then UV-cured to produce a film-shaped specimen. Then, the antibacterial activity of the specimens was measured against Escherichia coli using the JIS Z 2801 method (Figs. 7c to 7e: antibacterial evaluation photos of Example 6-1 and Example 6-2, respectively, when no additive was included).

[0186] As can be seen in Fig. 7, Example 6 can prevent discoloration as described above, while also showing significantly superior antibacterial properties.

[0187]

[0188] <Examples 7-1 to 7-2>

[0189] An antibacterial coating composition was manufactured in the same manner as in Example 1-1, but instead of the antioxidant as an additive, 1 wt% of NaCO3 (Example 7-1) and Mg(OH)2 (Example 7-2) were used as pH adjusters, respectively, to manufacture an antibacterial coating composition.

[0190]

[0191] Experimental Example 7

[0192] For the antibacterial coating compositions according to Examples 7-1 to 7-4, the following items were evaluated and shown in Fig. 8.

[0193] 1. Solubility evaluation

[0194] For the antibacterial coating compositions according to Examples 7-1 and 7-2, solubility, including formation of sediment, was evaluated immediately after mixing the additives (Figs. 8a and 8b: photographs immediately after mixing the additives of Examples 7-1 and 7-2, respectively).

[0195] As can be seen in Fig. 8, in Examples 7-1 to 7-2 according to the present invention, it can be confirmed that a precipitate is formed as a reaction occurs immediately after mixing.

[0196] 2. Discoloration Evaluation

[0197] Regarding the antibacterial coating compositions according to Examples 7-1 and 7-2, whether discoloration occurred one day after mixing the additives was visually evaluated (Figs. 8c to 8d: photographs taken one day after mixing the additives of Examples 7-1 and 7-2, respectively).

[0198] As can be seen in Fig. 8, it can be confirmed that discoloration occurred in Examples 7-1 to 7-2 according to the present invention.

[0199]

[0200] <Examples 8-1 to 8-5>

[0201] An antibacterial coating composition was manufactured in the same manner as in Example 1-1, but instead of an antioxidant, 1 wt% of Ba Stearate (Example 8-1), Zn Stearate (Example 8-2), Mg Stearate (Example 8-3), K Stearate (Example 8-4), and Ca Stearate (Example 8-5) of the stearate series, which are known to be effective in preventing silver discoloration, were used to manufacture an antibacterial coating composition.

[0202]

[0203] Experimental Example 8

[0204] For the antibacterial coating compositions according to Examples 8-1 to 8-5, the following items were evaluated and shown in Fig. 9.

[0205] 1. Solubility evaluation

[0206] For the antibacterial coating compositions according to Examples 8-1 to 8-2, solubility, including formation of precipitates, was evaluated immediately after mixing the additives (Figs. 9a to 9e: photographs immediately after mixing the additives of Examples 8-1 to 8-5, respectively).

[0207] As can be seen in Fig. 9, it can be confirmed that Examples 8-1 to 8-5 according to the present invention do not dissolve or disperse when mixed and a precipitate is formed.

[0208]

[0209] <Examples 9-1 to 9-2>

[0210] An antibacterial coating composition was manufactured in the same manner as in Example 1-1, but instead of an antioxidant as an additive, a UV absorber and an antioxidant were added, respectively.

[0211] - Example 9-1: UV absorber N-(4-Ethoxycarbonylphenyl)-N'-Methyl-N' Phenylformamidine (Phenylformamidine series)

[0212] - Example 9-2: Antioxidant Diisodecyl pentaerythritol diphosphate (Phosphite)

[0213]

[0214] Experimental Example 9

[0215] For the antibacterial coating compositions according to Examples 9-1 and 9-2, the following items were evaluated and shown in Fig. 10.

[0216] 1. Discoloration evaluation

[0217] Regarding the antibacterial coating compositions according to Examples 9-1 and 9-2, whether discoloration occurred was visually evaluated 3 days after mixing the additives (Figs. 10a and 10b: photographs taken 1 day after mixing the additives of Examples 10-1 and 10-2, respectively).

[0218] As can be seen in Fig. 10, discoloration occurred in Example 9-1 according to the present invention, but discoloration did not occur in Example 9-2.

[0219] 2. Antibacterial activity evaluation

[0220] For the antibacterial coating composition according to Example 9-2, the antibacterial coating solvent-free composition was applied to a PET film using a bar coater to an average thickness of 5 μm, prebaked at a temperature of 75°C, and then a film-shaped specimen was manufactured through UV curing. The antibacterial activity of the specimen was measured against E. coli using the JIS Z 2801 method (Figs. 10c to d: when no additive was included, and antibacterial activity evaluation photos of Example 9-2, respectively).

[0221] As can be seen in Fig. 10, Example 9-2 can prevent discoloration as described above, while also showing significantly superior antibacterial properties.

[0222] 2. Haze and discoloration evaluation

[0223] For the antibacterial coating composition according to Example 9-2, haze and discoloration were measured using a spectrophotometer according to JIS K 7105.

[0224] As a result, it was confirmed that the haze was significantly low with a haze of 0.28%, a*: -0.11, b*: 0.46, and △E*: 2.92, and that the discoloration was also significantly low.

[0225]

[0226] Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiment presented in this specification, and a person skilled in the art who understands the spirit of the present invention will be able to easily propose other embodiments by adding, changing, deleting, or adding components within the scope of the same spirit, but this will also be considered to fall within the spirit of the present invention.

Claims

1. Antibacterial preparations containing silver; Paint containing a viscosity modifier; and An antimicrobial coating composition comprising an additive; 2. In paragraph 1, An antibacterial coating composition, characterized in that the antibacterial agent comprises a solvent and a silver salt.

3. In paragraph 1, The above paint is an antibacterial coating composition containing an oligomer of the urethane acrylate series having a 6-functional group.

4. In paragraph 1, An antibacterial coating composition characterized in that the viscosity modifier is at least one selected from the group consisting of HDDA (1,6-Hecanediol Diacrylate), DPGDA (Dipropylene glycol Diacrylate), DPPA (Dipentaerythritol pentacrylate), DPHA (Dipentaerythritol hexaacrylate), IBOA (Isobornyl acrylate), TPGDA (Tripropylene glycol Diacrylate), PETA (Pentaerythritol Triacrylate), PETTA (Pentaerythritol Tetraacrylate), and TMPTA (Trimethylolpropane Triacrylate).

5. In paragraph 1, An antibacterial coating composition, characterized in that the additive comprises at least one selected from the group consisting of an antioxidant, a UV absorber, a light stabilizer, a heat stabilizer, and a pH regulator.

6. In paragraph 1, An antibacterial coating composition, characterized in that the additive is at least one of a phenylformamidine-based UV absorber, a phenol-based antioxidant, and a phosphite-based antioxidant.

7. In paragraph 1, An antibacterial coating composition characterized in that the antibacterial agent, paint and additive are contained in an amount of 0.5 to 1.5 wt%: 97 to 99 wt%: 0.5 to 1.5 wt%.

8. In paragraph 1, An antibacterial coating composition characterized by having an antibacterial activity of 99.9% or higher as evaluated according to the following experimental method 1: [Experimental Method 1] An antibacterial coating composition was applied to a PET film with an average thickness of 5 μm using a bar coater, prebaked at a temperature of 75°C, and then a film-shaped specimen was manufactured through UV curing. The antibacterial activity of the specimen was measured against E. coli using the JIS Z 2801 method.

9. In paragraph 1, An antibacterial coating composition characterized in that the haze evaluated according to the following experimental method 2 is 3% or less and the discoloration degree (△E*) is 5 or less. [Experimental Method 2] For antibacterial coating compositions, haze and discoloration were measured using a spectrophotometer according to JIS K 7105.

10. A first step of preparing an antibacterial preparation by adding an antibacterial agent containing silver to a solvent; A second step of preparing an antibacterial coating composition by mixing the antibacterial agent, a paint containing a viscosity modifier, and an additive; and A method for manufacturing an antibacterial product, comprising: a third step of coating the antibacterial coating composition on a product;

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