Antibacterial and antimold thermal-insulation coating and building material

Abstract

To provide a thermal-insulation coating that achieves antibacterial and antimold properties in addition to thermal insulation and further exhibits high safety for a human body.SOLUTION: A thermal-insulation coating comprises, relative to 100 pts.mass of an aqueous resin, 35 to 70 pts.mass of silica-based foamed particles, 0.5 to 10 pts.mass of silica having a silanol group, 0.3 to 6 pts.mass of a water-soluble polymer having an amide-carbonyl group, 10 to 60 pts.mass of a heat-shielding inorganic powder, 3 to 6.0 pts.mass of titanium oxide having a hydroxyl group, and 2 to 30 pts.mass of a quaternary ammonium compound, the aqueous resin being a silicone-acrylic resin emulsion containing a reactive silicone component.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to heat-insulating paints and building materials having antibacterial and antifungal properties, which are used to form heat-insulating layers on the exterior walls of buildings and the interior walls of rooms. [Background technology]

[0002] The rise in average temperatures due to global warming is one of the changes that has affected ecosystems, and the activity of mold and fungi is attracting attention. This is because the health hazards caused by mold and fungi that invade and grow inside the environment are becoming a problem. In addition to infectious diseases, there are numerous health hazards caused by nosocomial infections in hospitals where such diseases are treated, food poisoning in kitchens, and mold in living spaces, and it is necessary to suppress bacteria in such situations. Furthermore, mold that grows on indoor walls is not only unsightly and aesthetically undesirable, but also poses a serious health risk.

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-268520 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0004] However, when using chemicals to eradicate or kill bacteria, depending on the ingredients used, there is a possibility that they may have adverse effects on the human body or result in contamination of the living environment. Moreover, if the eradication process is not repeated, the bacteria will revive and re-emerge. Therefore, there is a need to develop a protective paint that exerts antibacterial and antimicrobial effects with as few additives as possible, has long-lasting effects, is non-toxic to humans and pets, and reduces environmental pollution caused by antibacterial and antimicrobial agents. However, developing a paint that is antibacterial yet has very low toxicity to the user is an extremely difficult task.

[0005] Furthermore, the JIS standard requires that insulation materials used as insulation layers on the exterior walls and interior walls of buildings have a thermal conductivity of less than 0.13, and various materials are known that meet this requirement. However, because these materials are block-shaped, they are difficult to apply to the exterior and interior walls of buildings, and it has been particularly difficult to apply a layer of insulation material to intricate, uneven surfaces. In contrast, an insulation material that can be applied to wall surfaces is desirable.

[0006] Furthermore, there has been no insulating material that is excellent in heat insulation, electromagnetic shielding, and recyclability, and that can be applied. In recent years, with the increasing demand for renovations, there has been a growing need for insulating materials that can improve the heat insulation and electromagnetic shielding properties simply by applying them to existing building materials. Furthermore, with the increasing demand for environmental considerations, there is also a growing need for recyclability.

[0007] The present invention has been made in view of the above circumstances, and its object is to provide an antibacterial and antifungal heat-insulating paint and building material that has heat-insulating properties as well as antibacterial and antifungal properties, and is highly safe for the human body. Another object of the present invention is to provide an antibacterial and antifungal heat insulating paint that can be easily applied to wall surfaces and the like. Another object of the present invention is to provide an antibacterial and antifungal heat insulating paint that is excellent in heat insulating properties, electromagnetic shielding properties, and recyclability, and that is easy to apply. [Means for solving the problem]

[0008] The present invention provides an antibacterial and antifungal heat insulating coating comprising 35 to 70 parts by weight of silica-based (Si-O-) expanded particles, 0.5 to 10 parts by weight of silica having silanol groups (Si-OH), 0.3 to 6 parts by weight of a water-soluble polymer having amidocarbonyl groups, 10 to 60 parts by weight of a heat-shielding inorganic powder, 3 to 6.0 parts by weight of titanium oxide having hydroxyl groups, and 2 to 30 parts by weight of a quaternary ammonium compound, relative to 100 parts by weight of aqueous resin, wherein the aqueous resin is a silicone acrylic resin emulsion containing a reactive silicone component (-Si-OR) or a urethane acrylic resin emulsion having amidocarbonyl groups.

[0009] Preferably, the silica-based foamed particles are foamed glass particles.

[0010] Preferably, the composition contains a pigment, a dispersant, and an adhesive.

[0011] Preferably, the silica having silanol groups is scaly silica having silanol groups.

[0012] Preferably, the water-soluble polymer having an amidocarbonyl group contains N-oxazoline, N-vinylpyrrolidone, or N,N-dimethylacrylamide.

[0013] Preferably, the water-soluble polymer having an amidocarbonyl group has an oxazoline ring.

[0014] Preferably, the titanium oxide having hydroxyl groups is a titanium oxide nanotube with hydroxyl groups exposed on the surface.

[0015] Preferably, the inorganic powder has a chemical structure of Si-O- or Ti-O-.

[0016] Preferably, the quaternary ammonium compound is ammonium fluoride, ammonium chloride, ammonium bromide, ammonium iodide, or ammonium hydroxide.

[0017] Preferably, the pigment is titanium dioxide.

[0018] Preferably, the resin is an acrylic silicone resin.

[0019] Preferably, a conductive aggregate formed from industrial waste, containing no iron powder, having a volume resistivity of less than 10 Ω cm, a moisture content of 20% or less, and consisting of powder with a particle size of 1 mm or less is mixed with the heat insulating raw material so that the conductive aggregate accounts for 5 to 35% of the total weight of the conductive aggregate and the heat insulating raw material.

[0020] The present invention is a building material impregnated with the above antibacterial and antifungal heat insulating coating material.

[0021] The building material of the present invention is a wallpaper. [Effects of the Invention]

[0022] According to the present invention, it is possible to provide an antibacterial and antifungal heat insulating paint and building material that has heat insulating properties as well as antibacterial and antifungal properties and is highly safe for the human body. Furthermore, according to the present invention, it is possible to provide an antibacterial and antifungal heat insulating paint that can be easily applied to wall surfaces and the like. Furthermore, according to the present invention, it is possible to provide an antibacterial and antifungal heat insulating coating material that is excellent in heat insulating properties, electromagnetic shielding properties, and recyclability, and that is easy to apply. DETAILED DESCRIPTION OF THE INVENTION

[0023] The antibacterial and antifungal heat insulating paint and its cloth of the present invention will be described below. The water-based resin in the antibacterial and antifungal heat-insulating paint of the present invention utilizes the hydrogen bonds of the water it contains and is formulated as a binder material for silica-based foam particles, which will be described later. Because it contains a reactive silicone component, it improves performance through cross-linking and has good compatibility with the -Si-O- component of the inorganic foam particles, which are the main component responsible for durability as a finishing material.

[0024] [Water-based resin] Examples of such aqueous resins include acrylic, ethylene vinyl acetate, vinyl acetate acrylic, SBR, epoxy, and urethane. Silicone acrylic resin emulsions containing reactive silicone components in the resin component, such as silicone acrylic resin emulsions with Si-OR reactive groups, or urethane acrylic resin emulsions whose main component is an aqueous dispersion of urethane resin with amidocarbonyl groups, are particularly preferred. Specifically, commercially available silicone acrylic resin emulsions such as Banstar S-806 (registered trademark) manufactured by Saiden Chemical Co., Ltd., Movinyl (registered trademark) manufactured by Nichigo Movinyl Co., Ltd., Kotax (registered trademark) manufactured by Toray Industries, Inc., and Charine (registered trademark) manufactured by Nissin Chemical Industry Co., Ltd. may be used. Alternatively, commercially available urethane acrylic resin emulsions such as Neosticker (registered trademark) manufactured by Nicca Chemical Co., Ltd. and Seflex (registered trademark) manufactured by Urethane Giken Kogyo Co., Ltd. may also be used. The aqueous resin may be mixed with other additives, such as film-forming aids, plasticizers, antifoaming agents, dispersants, surfactants, wetting agents, and viscosity modifiers, as needed. Compared to acrylic emulsions, silica-based expanded particles have the effect of reducing the viscosity of silicone acrylic emulsions during mixing. While this reduced viscosity is beneficial for mixability and ease of use, it is usually detrimental to the dispersion stability of the expanded particles, but this is not a problem in the present invention. In the case of silicone acrylics, this problem is alleviated by the affinity between the -Si-O- groups in the aqueous resin and silica in the method of the present invention. The same is true for urethanes due to the effect of the amide carbonyl group. The incorporation of large amounts of silica-based foam particles has a significant positive effect on dispersion and stabilization. Without this stabilizing effect, dispersion stabilization by viscosity would be required.

[0025] [Silica-based expanded particles] The silica-based foam particles in the antibacterial and antifungal insulating coating of the present invention are used as a filler for imparting heat insulation. These include hollow silica particles such as shirasu balloons, hollow glass particles (foam glass particles) such as glass balloons, and hollow ceramic particles, either alone or in combination. Among the hollow silica particles, shirasu balloons are spherical, hollow glass particles obtained by heat-treating volcanic glass deposits such as shirasu. There are no particular restrictions on the average particle size, as long as it is 10 to 200 μm. Various known shirasu balloons can be used, with 50 to 120 μm being preferred. Specifically, SB-5011 and SB-5021, which are made from shirasu, are suitable. Among the hollow glass particles, there are no particular restrictions on the average particle size, as long as it is 10 to 200 μm. Various known hollow glass particles can be used, with 40 to 120 μm being preferred. Specifically, Celstar (registered trademark) Z-20 manufactured by Tokai Kogyo Co., Ltd. or an equivalent product can be preferably used. Note that silane coupling treatment of the surface is not required. From the viewpoint of coating film performance, foamed glass particles are generally used in an amount of 24 to 34 parts by weight, but in the present invention, the amount is 35 to 70 parts by weight, preferably 36 to 66 parts by weight, per 100 parts by weight of the aqueous resin binder. If the amount is less than 36 parts by weight, the heat insulating properties are low, and if it is more than 70 parts by weight, the binder strength is reduced and water resistance is poor. Shirasu balloons are natural products and inevitably contain impurities, which give the product a brown color, and although they can be removed, they tend to contain a considerable proportion of broken beads, and they are prone to breakage during mixing, so glass balloons are preferable.

[0026] [Silica with silanol groups (Si-OH)] The antibacterial and antifungal heat insulating coating of the present invention contains 0.5 to 10 parts by weight of silica having silanol groups (Si-OH) per 100 parts by weight of aqueous resin. The silica having silanol groups is scaly silica having silanol groups. If the amount is less than 0.5 parts by weight, sufficient effect cannot be obtained, and if the amount is more than 10 parts by weight, although the miscibility of the foam particles increases, there is a disadvantage that separation tends to occur.

[0027] [Water-soluble polymers with amide carbonyl groups] In the antibacterial and antifungal heat-insulating coating of the present invention, the water-soluble polymer having an amidocarbonyl group is used as a dispersant for the -Si-O- and -Ti-O- components. Examples of water-soluble polymers having an amidocarbonyl group include N-oxazoline-based, N-vinylpyrrolidone-based, and N,N-dimethylacrylamide-based water-soluble polymers, as well as water-soluble polymers having an oxazoline ring. Examples of N-oxazoline-based aqueous resins that can be used include "Epocross" (registered trademark) manufactured by Nippon Shokubai Co., Ltd., and "Rubitec" and "Ruviscol" (registered trademarks) manufactured by BASF Corporation.

[0028] The amidocarbonyl groups of such water-soluble polymers coordinate to the Si-O-Si and metal-O- faces of silica through hydrogen bonds, wetting the surface of the expanded silica particles and improving their miscibility with water and resins. As a result, the Si-O-Si and metal-O- faces are covered with the water-soluble polymer having amidocarbonyl groups, resulting in a stable dispersion of silica in water. To stabilize the dispersion, organic emulsifiers, dispersants, and low-molecular-weight phosphates are usually used, but in this application, a large amount of dispersant is required to cover a large surface area, which reduces water resistance. In the present invention, a water-soluble polymer with as little amidocarbonyl group as possible is used, making it possible to effectively utilize Si-Si-O- directly and indirectly. The water-soluble polymer having the above-mentioned amidocarbonyl group is used in an amount of 0.3 to 6 parts by weight, preferably 0.4 to 5 parts by weight, per 100 parts by weight of the aqueous resin which is the binder material. If the amount is less than 0.3 parts by weight, the miscibility effect is small, and if the amount is more than 6 parts by weight, not only is there a problem with water resistance, but the viscosity is also high and the polymer is prone to separation when stored for a long period of time.

[0029] [Heat-shielding inorganic powder] The heat-shielding inorganic powder in the antibacterial, antifungal and heat-insulating coating material of the present invention refers to particles that can efficiently reflect near-infrared rays (wavelength range of 780 to 2500 nm). Examples of such heat-shielding inorganic powders include titanium oxides (including rutile and anatase types) such as JR-1000 (manufactured by Teika Corporation), CR-97, and R-630 (all manufactured by Ishihara Sangyo Kaisha, Ltd.), barium titanate, sodium titanate, silicon oxide, silica (including amorphous silica), zinc oxide, cerium oxide, calcium oxide, barium oxide, zirconium oxide, yttrium oxide, indium oxide, magnesium oxide, aluminum oxide, alumina, dioxane violet (manufactured by Clariant), iron oxide red (manufactured by Bayer), cyanine green (manufactured by Toyo Ink Co., Ltd.), quinacridone violet (manufactured by Clariant), barium carbonate, and magnesium carbonate. Among these, titanium oxide, zinc oxide, and zirconium oxide are particularly suitable for use because they can effectively reflect near-infrared light.

[0030] In addition to the above, color pigments that reflect near-infrared rays may also be used as the heat-shielding inorganic powder. Examples of such color pigments include iron oxide, yellow iron oxide, antimony tin oxide, aluminum flakes, flaky aluminum, cobalt blue, lithopone, and lead sulfide; organic pigments such as phthalocyanine, anthraquinone, quinacridone, azo, perinone, perylene, indigo / thioindigo, dioxazine, methine / azomethine, isoindolinone, and diketopyrrolopyrrole; diamond black, graphite, fullerene, graphene, aniline black, carbon nanotubes, carbon nanohorns, aluminum hydroxide, iron hydroxide, silicon carbide, boron nitride, diatomaceous earth, hydrated lime, gypsum, bentonite, clay, mica, clay minerals, iron, copper, nickel, gold, silver, zinc, ferrite, stainless steel, chromium oxide, cobalt oxide, zinc green, and the like. Examples of pigments include chromium green, cobalt green, viridian, Guinea green, cobalt chrome green, Scheele green, green earth, manganese green, pigment green, ultramarine, Prussian blue, pigment green, rock ultramarine, cobalt blue, cerulean blue, copper borate, molybdenum blue, copper sulfide, cobalt purple, Mars purple, manganese purple, pigment violet, lead suboxide, calcium plumbate, zinc yellow, chrome yellow, ochre, cadmium yellow, strontium yellow, titanium yellow, litharge, pigment yellow, cuprous oxide, cadmium red, selenium red, chrome vermilion, red iron oxide, zinc white, antimony white, basic lead sulfate, lead silicate, zirconium oxide, tungsten white, lead, zinc oxide, Banchison white, lead phthalate, manganese white, lead sulfate, thermatomic black, vegetable black, potassium titanate whiskers, and molybdenum disulfide. The heat-shielding inorganic powders exemplified above may be used alone or in combination of two or more.

[0031] In the present invention, 10 to 60 parts by weight of heat-shielding inorganic powder is contained per 100 parts by weight of the aqueous resin. If the amount is less than 10 parts by weight, problems arise in terms of heat-shielding properties, shielding properties, and bulking ability, while if it exceeds 60 parts by weight, miscibility, dispersibility, water resistance, heat insulation, etc. decrease.

[0032] [Titanium oxide with hydroxyl groups] The titanium dioxide in the antibacterial, antifungal, and heat-insulating paint of this invention is useful as a barrier material in paints and as a white pigment, along with zinc oxide. However, for outdoor paints, durable grades of pigment titanium dioxide are preferred. While the use of titanium in combination with other titanium compounds provides barrier properties and heat insulation through its white color, as a common practice in paints, the hydrogen bond network of -XO- and HOH is not utilized to prevent settling or improve dispersibility. Titanium dioxide (TiO2), like silica (SiO2), is a material that readily possesses -X-OH and hydroxyl groups on its surface. Metallic titanium, along with zirconium, is also used as a biomaterial for bone reinforcement due to its affinity with living organisms due to the -OH groups on its surface. Titanium dioxide as a pigment is easy to disperse, but it does require a certain amount of dispersant and high-speed mechanical dispersion. Dispersed materials tend to settle easily when diluted due to their weight, so viscosity is required after dispersion. It is preferable to pre-disperse titanium dioxide in order to simplify the process, but it is important to check whether this does not affect the performance of the product. It is necessary. If dispersibility is given priority, dispersants are used in large quantities, which can easily lead to performance problems in aqueous media, and it can also become difficult to adjust the viscosity of the product. The inorganic non-foamed particles are used in an amount of 10 to 60 parts by weight, preferably 15 to 50 parts by weight, per 100 parts by weight of the aqueous resin binder. If the amount is less than 10 parts by weight, problems arise in terms of heat-shielding properties, shielding properties, and weight gain, while if the amount is more than 60 parts by weight, miscibility, dispersibility, water resistance, heat insulation, etc. are reduced.

[0033] The titanium oxide with hydroxyl groups in this invention solves the dispersion problem of the inorganic non-expanded particles and expanded particles, and is a tubular or wire-shaped (fiber-like) titanium oxide synthesized from titanium oxide, which has hydroxyl groups on its surface and is processed into a water slurry to adjust the median particle size to 1 μm (1,000 nanometers) or less (see JP 10-152323 A). It is presumed that the action of these hydroxyl groups and the pile-like shape effect improves compatibility with organic substances and further compatibility with the medium water and the constituent components of -Si-O- and -Ti-O-, and is effective in preventing the settling of inorganic non-expanded particles. Titanium is usually known for its photocatalytic effect, which causes it to acquire an electric charge when irradiated with light and decompose surrounding organic matter, and is therefore a cause of chalking in coating materials, but hydroxyl-coated titanium dioxide, which is easily produced from titanium dioxide, works as a dispersant for titanium dioxide and foam particles due to the effects of the titanium component, the hydroxyl groups on the surface, and its shape, and it also has excellent affinity with organic matter, with the -Si-O- and -Si-OH components of organic and inorganic substances, and with the HOH water in the medium.This titanium dioxide is produced from commercially available titanium dioxide pigments. The amount of titanium oxide is 3 to 6 parts by weight, preferably 3.5 to 5.0 parts by weight, per 100 parts by weight of the aqueous resin binder. If the amount is less than 3.0 parts by weight, sufficient effect cannot be obtained, and if the amount is more than 6.0 parts by weight, performance beyond the effect of the present invention cannot be expected, and instead water resistance will be reduced. The titanium oxide having hydroxyl groups is a titanium oxide nanotube with hydroxyl groups exposed on the surface.

[0034] [Quaternary ammonium compounds] The quaternary ammonium compounds of the antibacterial and antifungal heat-insulating coating of the present invention include ammonium fluoride. Ammonium fluorides, ammonium chlorides, ammonium bromides, ammonium iodides, and ammonium hydroxides. As the quaternary ammonium compound, compounds other than those mentioned above may also be used.

[0035] In the present invention, the quaternary ammonium compound is mixed in an amount of 2 to 30% by weight relative to 100 parts by weight of the aqueous resin, which is the binder material. Experiments have confirmed that when the amount of the quaternary ammonium compound is less than 2% by weight of the total weight, the antibacterial and antifungal effects are significantly reduced. Furthermore, experiments have confirmed that if the amount of quaternary ammonium compound is more than 30% by weight of the total weight, the quaternary ammonium compound reacts with the resin that makes up the insulating base material, causing discoloration.

[0036] The antibacterial and antifungal heat insulating coating of the present invention contains a pigment, a dispersant, and an adhesive. That is, the heat insulating and heat-shielding coating material of the present invention may contain additives such as pigments, dyes, emulsions, suspensions, dispersions and aqueous solutions of other resins, water for adjusting the solid content and viscosity, organic solvents such as emulsifiers and film-forming agents for adjusting the surface tension, anti-blocking agents, dispersion stabilizers, thixotropic agents, antioxidants, ultraviolet absorbers, defoamers, thickeners, surfactants, fillers, catalysts, lubricants, preservatives, antistatic agents, leveling agents, antibacterial agents and antifungal agents, as needed.

[0037] [cross] The cloth of this embodiment is produced by impregnating or coating ordinary cloth with the antibacterial and antifungal heat insulating paint of this embodiment described above. Here, the ordinary cloth is a cloth that does not have special heat insulating, antibacterial, or antifungal properties. The antibacterial and antifungal heat insulating paint of this embodiment is applied to ordinary wallpaper in an amount of 20 to 300 g / m 2 . This is because if the amount of antibacterial and antifungal insulating paint applied is less than 40m2, the wallpaper base will become visible, and if it is more than 300g / m2, the insulating paint may crack.

[0038] The above antibacterial and antifungal heat-insulating paint can be applied by brush, roller, spraying, pattern coating, etc. The application process may be carried out multiple times, thereby enhancing the soundproofing effect.

[0039] [Test Results] Table 1 below shows the results of an antibacterial test carried out on a cloth coated with the antibacterial and antifungal heat insulating paint of this embodiment. This test was carried out at the Biological Testing Center of the Japan Synthetic Fiber Inspection Association. The test method used was JIS Z2801, 5.2. In addition, polyethylene film was used as an unprocessed test piece. We used the As shown in Table 1 below, the cloth coated with the antibacterial and antifungal heat-insulating paint of this embodiment had overwhelmingly fewer live bacteria, almost zero, for Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, MRSA, Pseudomonas aeruginosa, O-157, Serratia marcescens, and Bacillus subtilis, compared to the untreated test piece.

[0040] [Table 1]

[0041] [effect] According to this embodiment, it is possible to provide a heat insulating coating material and building material that has antibacterial and antifungal properties in addition to heat insulating properties, and is highly safe for the human body. Furthermore, according to this embodiment, it is possible to provide an antibacterial and antifungal heat insulating paint that can be easily applied to wall surfaces and the like. Furthermore, the antibacterial and antifungal heat insulating paint of this embodiment has high heat shielding properties (90 to 96%) in addition to heat insulating properties. Furthermore, the heat insulating paint of this embodiment has very low thermal conductivity (approximately 0.013 kcal).

[0042] The mechanism of the antibacterial effect of the heat insulating coating of this embodiment is as follows. The ingredients in the heat-insulating paint of this embodiment that inhibit bacteria and mold are hydrophobic, allowing them to easily penetrate into bacterial cells. Because of this penetrating effect, even a very small amount of the ingredients can exert antibacterial and antimicrobial effects. They are completely harmless to humans and animals such as pets. While commercially available antibacterial ingredients are not easily broken down when they enter the human body and can accumulate in fats and lipids, this ingredient does not have a cumulative or accumulative effect. Furthermore, the antibacterial effect is long-lasting. In other words, even if all bacteria adhering to the paint surface are killed once, it is meaningless unless the bactericidal effect is sustained. Since various bacteria continue to adhere to the surface, long-term sustainability is required. The components used in the heat-insulating paint of this embodiment are poorly soluble in water and remain on the paint surface for a long time, continuously migrating in minute amounts from the interior of the paint to the underlying surface, so they only act on bacteria adhering to the surface. Except when the painted surface is immersed in water, the long-term effect is sustained under normal dry conditions, resulting in a drastic reduction in the amount of other bactericidal and antibacterial agents used and the amount of work required. Regarding safety, the components that exert the antibacterial and antibacterial properties of the heat insulating paint of this embodiment are approved for use in environments where they come into contact with humans, and are therefore highly safe. In other words, they do not contain any VOCs (volatile organic compounds) or carcinogens or other potentially harmful chemical substances.

[0043] [Application example] In addition to the above-mentioned cloth, the heat insulating paint of this embodiment can be applied to or impregnated into wood, iron, concrete, boards, aluminum, stainless steel, tiles, bricks, blocks, siding, slate, glass, and the like.

[0044] [Application] Food industry: The antibacterial and antifungal heat-insulating paint of this embodiment is applied to the interior walls of food factories. When used to paint food warehouses, it not only prevents condensation and provides insulation, but also suppresses bacteria such as Staphylococcus aureus, Escherichia coli, and O-157, as well as mold. This is effective in dramatically reducing food poisoning. restaurant: The antibacterial and antifungal heat-insulating paint of this embodiment can be used in restaurant kitchens, interior decorations, etc. By using the antibacterial and antifungal paint on customer tables, curtains, floors, etc., the effect can be further increased, dramatically reducing food poisoning, etc. It is also effective against Salmonella and O-157. Construction, Apartments, Building Materials: By applying the antibacterial and antifungal heat-insulating paint of this embodiment to building materials, buildings that will not allow bacteria or mold to grow for a certain period of time can be sold with a limited-term guarantee, which could be a major differentiator from other companies.

[0045] Prevention of hospital-acquired infections: Bacteria control is important for hospitals and other medical facilities. The antibacterial and antifungal heat-insulating paint of this embodiment is an ideal countermeasure paint for this purpose. When applied to the interior walls of a hospital, it inactivates biological factors such as MRSA (methicillin-resistant Staphylococcus aureus), Bordetella pneumoniae, Serratia marcescens, Pseudomonas aeruginosa, resistant bacterial species, and bacteria including mold and yeast that are dangerous to the human body.

[0046] Various applications in the home: This antibacterial and antifungal heat-insulating paint can be used in ordinary homes. When used in various interior areas, it can significantly reduce the risk of developing health problems such as pathogens, bacterial and fungal infections, atopic dermatitis, and allergies. The main source of allergens in the home is fungal spores that have increased in the air.

[0047] Home renovation: It is ideal for renovating north-facing rooms, kitchens, washrooms, bathrooms, etc. The UV-cut component absorbs ultraviolet rays, slowing down the fading process.

[0048] It also blocks solar heat and cold air from entering the room, improving the efficiency of heating and cooling equipment and reducing heating and cooling costs. The coating, made of extremely small special ceramic particles and just 0.4 to 0.6 mm thick, blocks out the strong summer sun and the cold winter air. It also blocks the energy from indoor heat sources with its excellent radiant heat reflection properties (heat source reflectivity of over 90%) and low thermal conductivity (thermal conductivity of 0.013 kcal / mh°C), preventing heat from escaping to the outside and shortening the time it takes for heating and cooling equipment to reach the set temperature. Furthermore, the coating film after drying is formed with 30 or more protective layers, among which are layers of air with extremely low thermal conductivity, thereby achieving low thermal conductivity.General insulation materials (types installed inside walls) tend to trap heat that enters from inside and outside, and when the heat cannot be contained, it escapes into the room or outside.However, by applying the paint of this embodiment to interior walls and ceilings, this can be prevented. This insulation effect makes it possible to reduce heating and cooling costs by approximately 30%. In other words, by reducing the operation of heating and cooling equipment, energy savings can be achieved, contributing to measures against global warming.

[0049] The present invention also provides an antibacterial and antifungal heat insulating paint in which a conductive aggregate formed from industrial waste, which does not contain iron powder, has a volume resistivity of less than 10 Ω cm, a moisture content of 20% or less, and is composed of powder with a particle size of 1 mm or less, is mixed with the heat insulating raw material so that the conductive aggregate accounts for 5 to 35% of the total weight of the conductive aggregate and the heat insulating raw material. Furthermore, the building material may be a building material containing the above-mentioned antibacterial and antifungal heat insulating coating material. The building material is, for example, wallpaper. A building material characterized by being impregnated with a material.

[0050] The present invention is not limited to the above-described embodiments. That is, those skilled in the art may make various modifications, combinations, subcombinations, and substitutions of the components of the above-described embodiments within the technical scope of the present invention or its equivalents. [Industrial Applicability]

[0051] The present invention is used for forming a heat insulating layer on the exterior wall surface of a building, the interior wall surface of a room, etc.

Claims

1. The composition comprises, relative to 100 parts by weight of an aqueous resin, 35 to 70 parts by weight of silica-based (Si-0-) expanded particles, 0.5 to 10 parts by weight of silica having a silanol group (Si—OH), 0.3 to 6 parts by weight of a water-soluble polymer having an amidocarbonyl group, 10 to 60 parts by weight of a heat-shielding inorganic powder, 3 to 6.0 parts by weight of titanium oxide having a hydroxyl group, and 2 to 30 parts by weight of a quaternary ammonium compound, The aqueous resin is a silicone acrylic resin emulsion containing a reactive silicone component (-Si-O-R) or a urethane acrylic resin emulsion having an amidocarbonyl group. Antibacterial and antifungal insulating paint.

2. The silica-based foamed particles are glass foamed particles. The antibacterial and antifungal heat insulating paint according to claim 1.

3. Comprising a pigment, a dispersant, and an adhesive The antibacterial and antifungal heat insulating paint according to claim 2.

4. 4. The antibacterial and antifungal heat insulating coating according to claim 3, wherein the silica having silanol groups is scaly silica having silanol groups.

5. The water-soluble polymer having an amidocarbonyl group contains N-oxazoline, N-vinylpyrrolidone, or N,N-dimethylacrylamide. The antibacterial and antifungal heat insulating paint according to claim 4.

6. The water-soluble polymer having an amido carbonyl group has an oxazoline ring. The antibacterial and antifungal heat insulating paint according to claim 5.

7. The titanium oxide having hydroxyl groups is a titanium oxide nanotube having hydroxyl groups exposed on the surface. The antibacterial and antifungal heat insulating paint according to claim 6.

8. The inorganic powder is characterized in that it has a chemical structure of Si-O-, Ti-O-. The antibacterial and antifungal heat insulating paint according to claim 7.

9. The quaternary ammonium compound is ammonium fluoride, ammonium chloride, ammonium bromide, ammonium iodide, or ammonium hydroxide. The antibacterial and antifungal heat insulating paint according to claim 8.

10. The pigment is titanium dioxide. The antibacterial and antifungal heat insulating paint according to claim 9.

11. The resin is an acrylic silicone resin. The antibacterial and antifungal heat insulating paint according to claim 10.

12. A conductive aggregate formed from industrial waste, containing no iron powder, having a volume resistivity of less than 10 Ω cm, a moisture content of 20% or less, and consisting of powder with a particle size of 1 mm or less is mixed with the heat insulating raw material so that the conductive aggregate accounts for 5 to 35% of the total weight of the conductive aggregate and the heat insulating raw material. The antibacterial and antifungal heat insulating paint according to claim 11.

13. A building material coated or impregnated with the antibacterial and antifungal heat insulating paint according to claim 1.

14. The building material is a wallpaper.

13. The building material according to claim 12.

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