Odor-decomposing agent, deodorizing paint, deodorizing porous material, and deodorizing interior material

Abstract

To provide an odor-decomposing agent capable fo removing various kinds of odorous components.SOLUTION: An odor-decomposing agent contains zinc oxide 13 and aluminum oxide 14 as a catalyst, and contains zeolite as an adsorbent in which a mole ratio of SiO2 / Al2O3 of zeolite is 5-500. Owing to the fact that the mole ratio of SiO2 / Al2O3 of zeolite is 5-500, zeolite has enhanced affinity to a non-polar substance, and adsorbs a higher amount of an organic compound of non-polar substance than a polar substance, such as water. The odor-decomposing agent preferentially adsorbs an odor component of the organic compound. The odor component adsorbed by zeolite repeats adsorption and desorption, and adsorption apparently enters an equilibrium state. Because the odor component repeats adsorption and desorption, a contact with the catalyst is repeated to promote decomposition.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The technical field of the present specification relates to a deodorizing and decomposing agent that removes and decomposes odorous components inside buildings, as well as a deodorizing paint, a deodorizing porous material, and a deodorizing interior material that include the deodorizing and decomposing agent. [Background technology]

[0002] Paints and interior materials that remove odorous components from inside buildings have been known for some time. Patent Document 1 describes an interior material that removes formaldehyde. Patent Document 2 describes a paint that removes formaldehyde and acetaldehyde. Furthermore, Patent Document 3 describes an interior material that removes ammonia, acetaldehyde, and acetic acid. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-286899 [Patent Document 2] Japanese Patent Application Publication No. 10-330681 [Patent Document 3] Japanese Patent Application Laid-Open No. 2003-13372 Summary of the Invention [Problem to be solved by the invention]

[0004] There are various types of odorous components present inside buildings. However, conventional paints and interior materials that remove odorous components are limited in the types of odorous components they can remove, and have the problem of being unable to remove a wide range of odorous components.

[0005] The technology of the present specification has been made in consideration of the above points, and aims to provide a deodorizing decomposition agent, as well as paints, porous materials, and interior materials, that can remove various types of odorous components. [Means for solving the problem]

[0006] A deodorizing decomposition agent according to an embodiment of the present specification is characterized by containing zinc oxide, aluminum oxide, and zeolite, and the SiO2 / Al2O3 molar ratio of the zeolite is 5-500.

[0007] According to the deodorizing decomposition agent of the embodiment of the present specification, zinc oxide and aluminum oxide are contained as catalysts, and the zinc oxide and aluminum oxide promote the decomposition of odorous components, and odorous components that are easily decomposed are immediately decomposed by the catalyst. The deodorizing decomposition agent contains zeolite as an adsorbent, and the zeolite has an SiO2 / Al2O3 molar ratio (silica / alumina molar ratio) of 5 to 500, which increases the affinity of the zeolite for non-polar substances and allows the zeolite to adsorb more non-polar organic compounds than polar substances such as water. Organic compounds of odorous components that are difficult to decompose by the catalyst are adsorbed by the zeolite and undergo repeated adsorption and desorption from the zeolite. As a result, the odorous components that are difficult to decompose are repeatedly brought into contact with the zinc oxide and aluminum oxide as catalysts, accelerating their decomposition. That is, according to the deodorizing decomposition agent of the embodiment, the decomposition of odorous components that are easy to decompose is accelerated by contact with the zinc oxide and aluminum oxide catalysts, while odorous components that are difficult to decompose, which are made of organic compounds, are repeatedly adsorbed and desorbed from the zeolite, which causes repeated contact with the catalyst, thereby accelerating the decomposition. Therefore, the deodorizing decomposition agent of the embodiment can attenuate various types of odorous components, from odorous components that are easy to decompose to odorous components that are difficult to decompose.

[0008] Here, the zeolite may have pores with a diameter of 0.3 to 0.9 nm.

[0009] According to this, the deodorizing decomposition agent of the embodiment can adsorb a wide variety of organic compounds depending on the diameter of the zeolite pores, and therefore can suitably attenuate various types of odor components.

[0010] The zeolite may be a combination of zeolite having pores with a diameter of 0.3 to 0.6 nm and zeolite having pores with a diameter of 0.65 to 0.9 nm.

[0011] As a result, the deodorizing decomposition agent of the embodiment can expand the range of zeolite pore diameters, allowing it to adsorb a wider variety of organic compounds and effectively attenuate various types of odor components.

[0012] The deodorizing decomposition agent may contain photocatalytic titanium oxide and / or manganese oxide.

[0013] This makes it possible to suitably attenuate a wider variety of odor components due to the catalytic performance of the photocatalytic titanium oxide and / or manganese oxide.

[0014] Here, the deodorizing paint of the embodiment may contain the above-mentioned deodorizing decomposition agent.

[0015] According to the deodorizing paint of the embodiment, the deodorizing coating film formed by forming the deodorizing paint can remove various types of odorous components.

[0016] The deodorizing porous material of the embodiment may have the above-mentioned deodorizing decomposition agent on the surface thereof.

[0017] According to this, the deodorizing porous material of the embodiment can remove various types of odor components.

[0018] The deodorizing interior material of the embodiment may have the above-mentioned deodorizing and decomposing agent on the surface thereof.

[0019] As a result, the deodorizing interior material of the embodiment can remove various types of odorous components. [Effects of the Invention]

[0020] The deodorizing and decomposing agent according to the embodiment of the present specification can remove various types of odor components. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 2 is an enlarged image of a cross section of a deodorizing coating film according to an embodiment. [Figure 2] FIG. 1 is a graph showing the deodorization rate of odorous components of a deodorizing decomposition agent according to an embodiment (Test Example 3). DETAILED DESCRIPTION OF THE INVENTION

[0022] The deodorizing decomposition agent, deodorizing paint, deodorizing porous material, and deodorizing interior material according to embodiments of the present specification will be described below. The scope of the present invention is not limited to the scope disclosed in the embodiments. The deodorizing decomposition agent according to the embodiment contains zinc oxide 13 and aluminum oxide 14 as catalysts and zeolite as an adsorbent, with the zeolite having an SiO2 / Al2O3 molar ratio (silica / alumina molar ratio) of 5 to 500. The deodorizing decomposition agent may also contain photocatalytic titanium oxide and / or manganese oxide as other catalysts 15. The deodorizing decomposition agent may be in the form of a powder in which a powder catalyst and a powder adsorbent are mixed, or in the form of a slurry in which a powder catalyst and a powder adsorbent are dispersed in a solvent. The deodorizing decomposition agent according to the embodiment can remove various types of odorous components occurring in living environments.

[0023] The odor components in the embodiments are odor components generated in living environments, such as cigarette smoke, garbage odor, sweat odor emanating from the human body, body odor due to aging or excretory odor, and formaldehyde and VOCs (volatile organic compounds) generated from building materials. These odor components include, as compounds, trimethylamine, triethylamine, methyl mercaptan, ethyl mercaptan, butyl mercaptan, allyl sulfides, isoamyl acetate, ethyl acetate, toluene, xylene, styrene, methanol, ethanol, acetone, acetaldehyde, formaldehyde, ammonia, hydrogen sulfide, acetic acid, fatty acids, isovaleric acid, palmitoleic acid, and 3-methyl-2-hexenoic acid. The deodorizing and decomposing agent of the embodiments can effectively remove these various types of odor components.

[0024] Zeilite is a porous material whose constituent elements are Al, Si, O, and cations, and whose basic skeleton is formed by tetrahedral structures of silica and alumina, with countless pores. It is an aluminosilicate represented by the following chemical formula (1). (chemical formula 1) Me 2 / X O·Al2O3·mSiO2·nH2O (1) (Me is an x-valent cation present in the zeolite pores. m is the silica-alumina ratio of the zeolite (SiO2 / Al2O3 molar ratio).) Zeolite is a porous material and therefore adsorbs various types of odorous components. The odorous components adsorbed on zeolite are repeatedly adsorbed and desorbed, and the adsorption appears to be in equilibrium. As the odorous components are repeatedly adsorbed and desorbed, they are repeatedly brought into contact with the catalyst, accelerating decomposition. The zeolite used in the embodiment can be a synthetic zeolite, and the silica-alumina ratio, pore diameter (pore size), etc. are adjusted.

[0025] The properties of zeolites' adsorption of substances change depending on the silica-alumina ratio (SiO2 / Al2O3 molar ratio). Zeolites with a silica-alumina ratio of 5 or higher (high-silica zeolites) have a weaker affinity for polar substances like water and tend to adsorb more non-polar substances, which are common among organic compounds. Therefore, high-silica zeolites preferentially adsorb organic compounds that are odorous components. Examples of organic compounds preferentially adsorbed by high-silica zeolites include trimethylamine, triethylamine, methyl mercaptan, ethyl mercaptan, butyl mercaptan, allyl sulfides, isoamyl acetate, ethyl acetate, toluene, xylene, styrene, methanol, ethanol, acetone, acetaldehyde, formaldehyde, acetic acid, fatty acids, isovaleric acid, palmitoleic acid, and 3-methyl-2-hexenoic acid. Of these, those that are difficult to decompose by catalysts are repeatedly adsorbed and desorbed onto zeolite, and decomposition is promoted by repeated contact with catalysts such as zinc oxide 13, aluminum oxide 14, and other catalysts 15 (photocatalytic titanium oxide, manganese oxide).

[0026] In the zeolite of the embodiment, the silica-alumina ratio can be set to 5 to 500. This is because odorous components of organic compounds can be suitably adsorbed. If the silica-alumina ratio is less than 5, odorous components of organic compounds may not be suitably adsorbed. On the other hand, if the silica-alumina ratio exceeds 500, the adsorption performance of the zeolite itself may be deteriorated. In another embodiment, the silica-alumina ratio can be set to 10 to 200, and in yet another embodiment, it can be set to 15 to 100.

[0027] The diameter of the pores (pore size) of the zeolite in this embodiment can be 0.3 to 0.9 nm. This is because it can adsorb various types of odorous components. If the pore diameter is less than 0.3 nm, it may not be possible to properly adsorb various types of odorous components. On the other hand, if the pore diameter exceeds 0.9 nm, the odorous component adsorption performance may be poor. In another embodiment, the zeolite pore diameter can be 0.65 to 0.9 nm. Note that pores with a diameter of 0.3 to 0.9 nm mean that the standard value of the pore diameter is within the range of 0.3 to 0.9 nm.

[0028] The zeolite having a pore diameter of 0.3 to 0.9 nm can be a combination of a zeolite having a pore diameter of 0.65 to 0.9 nm (hereinafter, sometimes referred to as fine zeolite 11) and a zeolite having a pore diameter of 0.3 to 0.6 nm (hereinafter, sometimes referred to as ultrafine zeolite 12). This is because the deodorizing decomposition agent has a zeolite having two types of pore diameter standard values, which expands the range of pores and enables it to adsorb a wider variety of odor components. In another embodiment, the zeolite having a pore diameter of 0.3 to 0.9 nm can be a combination of a zeolite having a pore diameter of 0.7 to 0.8 nm and a zeolite having a pore diameter of 0.4 to 0.5 nm.

[0029] The ultrafine zeolite 12 can be blended in an amount of 50 to 200 parts by mass relative to 100 parts by mass of the fine zeolite 11. This is because various types of odorous components can be adsorbed in a balanced manner. If the blending amount of the ultrafine zeolite 12 is less than 50 parts by mass relative to 100 parts by mass of the fine zeolite 11, the range of pore diameters of the zeolite may not be sufficiently widened, and the range of types of odorous components that can be adsorbed may not be sufficiently widened. On the other hand, if the blending amount of the ultrafine zeolite 12 is more than 200 parts by mass relative to 100 parts by mass of the fine zeolite 11, the pore diameters may be biased to 0.3 to 0.6 nm, and again, the range of types of odorous components that can be adsorbed may not be sufficiently widened. In another embodiment, the blending amount of the ultrafine zeolite 12 may be 70 to 190 parts by mass relative to 100 parts by mass of the fine zeolite 11, and in yet another embodiment, it may be 90 to 180 parts by mass.

[0030] The average particle diameter (median diameter d50) of the zeolite (fine zeolite 11 and ultrafine zeolite 12) can be set to 0.1 to 100 μm. This is because the adsorption function can be fully exhibited and handling is easy. If the average particle diameter of the zeolite is less than 0.1 μm, when the form is a slurry (dispersion), the viscosity of the slurry may increase, resulting in poor handling. On the other hand, if the average particle diameter of the zeolite exceeds 100 μm, the area with which odorous components can come into contact may decrease, resulting in the catalyst function not being fully exhibited. In another embodiment, the average particle diameter of the zeolite can be set to 1 to 50 μm, and in yet another embodiment, it can be set to 5 to 20 μm.

[0031] Commercially available zeolites (high silica zeolites) can be used, and examples of commercially available zeolites that can be used include the ABSCENTS series, USKY series, USYZ series, and HiSiv series (manufactured by Resonac Universal Co., Ltd.), the Shilton MT series, Mizuka Sieves EX series, and ZSM-5 series (manufactured by Mizusawa Industrial Chemicals Co., Ltd.), and the high silica zeolite HSZ series (manufactured by Tosoh Corporation). These are synthetic zeolites with adjusted silica-alumina ratios and pore diameters (pore size).

[0032] Zinc oxide 13 is represented by the chemical formula ZnO and is an oxide with catalytic function that accelerates the decomposition of odorous components. The decomposition of odorous components is accelerated by contact with zinc oxide 13. Among odorous components, organic compounds that are difficult to decompose by catalysts are accelerated in decomposition by repeated contact with zinc oxide 13 during adsorption and desorption onto zeolite, and the decomposition of even difficult-to-decompose odorous components is accelerated.

[0033] The zinc oxide 13 is in a powder form, and the average particle size (median diameter d50) can be 0.1 to 100 μm. This is because the decomposition of odorous components is suitably promoted. If the average particle size of the zinc oxide 13 is less than 0.1 μm, when the form is a slurry (dispersion), the viscosity of the slurry may increase, making it difficult to handle. On the other hand, if the average particle size of the zinc oxide 13 exceeds 100 μm, the area with which odorous components can come into contact may decrease, and the decomposition of the odorous components may not be sufficiently promoted. In another embodiment, the average particle size of the zinc oxide 13 can be 0.2 to 50 μm, and in yet another embodiment, it can be 0.5 to 20 μm.

[0034] The zinc oxide 13 can be blended in an amount of 3 to 30 parts by mass relative to 100 parts by mass of the fine zeolite 11. This is because the decomposition of odorous components is suitably promoted. If the blending amount of zinc oxide 13 is less than 3 parts by mass relative to 100 parts by mass of the fine zeolite 11, the decomposition of odorous components may not be sufficiently promoted. On the other hand, if the blending amount of zinc oxide 13 is more than 30 parts by mass relative to 100 parts by mass of the fine zeolite 11, the effect of promoting the decomposition of odorous components may plateau. In another embodiment, the blending amount of zinc oxide 13 can be 5 to 25 parts by mass relative to 100 parts by mass of the fine zeolite 11, and in yet another embodiment, it can be 7 to 20 parts by mass.

[0035] Commercially available zinc oxide 13 can be used, and examples of commercially available zinc oxide 13 that can be used include the zinc oxide series (manufactured by Merck Ltd.), the zinc oxide series (manufactured by Sakai Chemical Industry Co., Ltd.), the nano zinc oxide series (manufactured by Sumitomo Osaka Cement Co., Ltd.), and the ZINCOX series (manufactured by Hakusui Tech Co., Ltd.).

[0036] Aluminum oxide 14 is represented by the chemical formula Al2O3 and has a catalytic function that promotes the decomposition of odorous components. In particular, when used in combination with zinc oxide 13, aluminum oxide 14 is an oxide that promotes the decomposition of odorous components.

[0037] The aluminum oxide 14 is in a powder form, and the average particle size (median diameter d50) can be 0.1 to 100 μm. This is because the decomposition of odorous components is suitably promoted. If the average particle size of the aluminum oxide 14 is less than 0.1 μm, when the form is a slurry (dispersion), the viscosity of the slurry may increase, making it difficult to handle. On the other hand, if the average particle size of the aluminum oxide 14 exceeds 100 μm, the area with which odorous components can come into contact may decrease, and the decomposition of the odorous components may not be sufficiently promoted. In another embodiment, the average particle size of the aluminum oxide 14 can be 1 to 50 μm, and in yet another embodiment, it can be 5 to 20 μm.

[0038] The aluminum oxide 14 can be blended in an amount of 1 to 10 parts by mass per 100 parts by mass of the fine zeolite 11. This is because the decomposition of odorous components is suitably promoted. If the blending amount of aluminum oxide 14 is less than 1 part by mass per 100 parts by mass of the fine zeolite 11, the decomposition of odorous components may not be promoted. On the other hand, if the blending amount of aluminum oxide 14 is more than 10 parts by mass per 100 parts by mass of the fine zeolite 11, the effect of promoting the decomposition of odorous components may plateau. In another embodiment, the blending amount of aluminum oxide 14 can be 2 to 8 parts by mass per 100 parts by mass of the fine zeolite 11, and in yet another embodiment, 3 to 6 parts by mass.

[0039] Commercially available aluminum oxide 14 can be used as the catalyst. Examples of commercially available aluminum oxide 14 include the aluminum oxide series (manufactured by Merck Ltd.), the alumina series (manufactured by Admatechs Co., Ltd.), the activated alumina series (manufactured by Sumitomo Chemical Co., Ltd.), and the Neo Bead series (manufactured by Mizusawa Industrial Chemicals Co., Ltd.).

[0040] The deodorizing decomposition agent may contain photocatalyst titanium oxide and / or manganese oxide as other catalysts 15.

[0041] Photocatalytic titanium oxide is expressed by the chemical formula TiO2, and deodorizing and decomposing agents containing photocatalytic titanium oxide can decompose odorous components and bacteria that come into contact with the deodorizing and decomposing agent due to the photocatalytic performance of titanium oxide. Photocatalytic performance is the ability of titanium oxide to decompose odorous components and bacteria using the oxidizing power of titanium oxide, which is expressed by water, oxygen, and ultraviolet light.

[0042] Titanium oxide crystal structures include rutile, anatase, and brookite structures, and these can be used as photocatalytic titanium oxide deodorizing and decomposing agents. In another embodiment, however, photocatalytic titanium oxide with anatase structure, which has excellent photocatalytic performance, can be used.

[0043] The average particle diameter (median diameter d50) of the titanium oxide photocatalyst can be set to 1 to 100 nm. This is because the titanium oxide photocatalyst can fully exhibit its catalytic function and can be easily dispersed in a slurry (dispersion liquid). If the average particle diameter of the titanium oxide photocatalyst is less than 1 nm, it may be difficult to disperse it in a slurry. On the other hand, if the average particle diameter of the titanium oxide photocatalyst exceeds 100 nm, the area with which odorous components can come into contact may be reduced, and the catalytic function may not be fully exhibited. In another embodiment, the average particle diameter of the titanium oxide photocatalyst can be set to 3 to 50 nm, and in yet another embodiment, it can be set to 10 to 20 nm.

[0044] The specific surface area of ​​photocatalytic titanium oxide is 100 to 500 m 2 / g. This is because the photocatalytic performance can effectively decompose odorous components and bacteria. 2 If the specific surface area is less than 500 m / g, the contact area is small and odorous components and bacteria may not be decomposed properly. 2 If the specific surface area of ​​the titanium oxide exceeds 200 to 450 m / g, the handling property may be poor. 2 / g, and in yet another embodiment, 300 to 400 m 2 / g.

[0045] The titanium oxide photocatalyst can be blended in an amount of 10 to 50 parts by mass per 100 parts by mass of the fine zeolite 11. This is because it can effectively decompose odorous components and bacteria. If the amount of titanium oxide photocatalyst blended is less than 10 parts by mass per 100 parts by mass of the fine zeolite 11, it may not be possible to effectively decompose odorous components and bacteria. On the other hand, if the amount of titanium oxide photocatalyst blended is more than 50 parts by mass per 100 parts by mass of the fine zeolite 11, the effect of decomposing odorous components and bacteria may plateau. In another embodiment, the amount of titanium oxide photocatalyst blended can be 15 to 45 parts by mass per 100 parts by mass of the fine zeolite 11, and in yet another embodiment, it can be 20 to 40 parts by mass.

[0046] Commercially available photocatalytic titanium oxide products can be used as the other catalyst 15 contained in the deodorizing decomposition agent of the embodiment. Examples of commercially available photocatalytic titanium oxide products that can be used include the SSP series (manufactured by Sakai Chemical Industry Co., Ltd.), the AMT series, the TKP series (manufactured by Teika Corporation), the Photopaque MPT series, and the Photopaque STS series (manufactured by Ishihara Sangyo Kaisha, Ltd.).

[0047] Manganese oxide is expressed by the chemical formula MnO2, and deodorizing and decomposing agents containing manganese oxide can decompose odorous components and bacteria that come into contact with them due to the catalytic properties of manganese oxide. While photocatalytic titanium oxide exerts its decomposition power when exposed to ultraviolet light, manganese oxide exerts its decomposition power even in the absence of light.

[0048] The average particle size (median diameter d50) of manganese oxide can be 0.1 to 100 μm. This is because the catalytic function can be fully exerted. If the average particle size of manganese oxide is less than 0.1 μm, when the form is a slurry (dispersion), the viscosity of the slurry may increase, making it difficult to handle. On the other hand, if the average particle size of manganese oxide exceeds 100 μm, the area with which odorous components can come into contact may decrease, making it difficult to fully exert the catalytic function. In another embodiment, the average particle size of manganese oxide can be 1 to 50 μm, and in yet another embodiment, it can be 5 to 20 μm.

[0049] In another embodiment, manganese oxide can be made into a porous body. This is because it can decompose odorous components effectively. The specific surface area of ​​manganese oxide as a porous body is 150 to 2000 m 2 / g. This is because odorous components can be decomposed more effectively. 2 If the specific surface area is less than 2000 m / g, the contact area is small and odorous components may not be decomposed properly. 2 If the specific surface area of ​​the manganese oxide is more than 170 to 1000 m / g, the stability of the slurry may be deteriorated when the deodorizing decomposition agent is in the form of a slurry (dispersion liquid). 2 / g, and in yet another embodiment, 200 to 400 m 2 / g.

[0050] Manganese oxide can be blended in an amount of 0.1 to 50 parts by mass relative to 100 parts by mass of the fine zeolite 11. This is because it can decompose odorous components effectively. If the blending amount of manganese oxide is less than 0.1 part by mass relative to 100 parts by mass of the fine zeolite 11, the odorous components may not be decomposed effectively. On the other hand, if the blending amount of manganese oxide is more than 50 parts by mass relative to 100 parts by mass of the fine zeolite 11, the effect of decomposing odorous components may plateau. In another embodiment, the blending amount of manganese oxide can be 1 to 45 parts by mass relative to 100 parts by mass of the fine zeolite 11, and in yet another embodiment, it can be 10 to 40 parts by mass.

[0051] Manganese oxide as the other catalyst 15 contained in the deodorizing decomposition agent of the embodiment can be a commercially available product. Examples of commercially available manganese oxide products that can be used include the manganese (IV) oxide (activated) series (manufactured by Kanto Chemical Co., Ltd.), the activated manganese dioxide series (manufactured by Japan Metals and Chemicals Co., Ltd.), the manganese (IV) oxide series (manufactured by Merck Ltd.), and the manganese dioxide series (manufactured by Chosei Shoji Co., Ltd.).

[0052] When the deodorizing decomposition agent is in the form of a slurry (dispersion liquid), other additives such as viscosity adjusters, dispersants, wetting agents, antifoaming agents, preservatives, and pH adjusters can be used. The viscosity adjusters, dispersants, wetting agents, and antifoaming agents are substances that adjust the handleability of the deodorizing decomposition agent. The preservatives and pH adjusters are substances that adjust the storage stability of the deodorizing decomposition agent. These can be commercially available general-purpose products.

[0053] The deodorizing decomposition agent in powder form can be produced by mixing the respective raw materials using a mixer such as a paddle mixer, a Nauta mixer, a ribbon mixer, a conical screw mixer, a Henschel mixer, etc. The deodorizing decomposition agent in slurry form can be produced by mixing the respective raw materials using a mixer such as a single-screw dissolver, a twin-screw dissolver, a butterfly dissolver, etc.

[0054] A powder deodorizing decomposition agent can be mixed with interior paint to form a deodorizing coating film 1 containing the deodorizing decomposition agent in a room, or by mixing the powder with a stone or sand display resembling a dry landscape garden and placing the deodorizing decomposition agent in a room, thereby removing various types of odor components. A slurry deodorizing decomposition agent can be mixed with interior paint to form a deodorizing coating film 1 containing the deodorizing decomposition agent in a room, or by spraying the slurry on wallpaper 2, curtains, etc., thereby removing various types of odor components. Furthermore, the deodorizing decomposition agent can be sprayed onto the filters (air conditioner filters) of air conditioning equipment in buildings, vehicles, ships, or aircraft to adhere to the filters. The deodorizing decomposition agent attached to the filter can remove various types of odor components in a room, such as a building, when the air conditioning equipment is operating, and can also remove odor components such as mold odors that arise in the air conditioning equipment.

[0055] The interior paint to be mixed with the deodorizing and decomposing agent can be any general-purpose interior paint, but an example of the formulation of a wallpaper top coat as an interior paint is shown in Table 1. The raw material blend amounts are those in a wet state including volatile components.

[0056] [Table 1]

[0057] The resin emulsion is an ethylene vinyl acetate resin emulsion (non-volatile content: 40% by mass). In addition to ethylene vinyl acetate resin, other resin compositions can also be used, such as acrylic resin, urethane resin, vinyl chloride resin, and vinyl acetate resin. Diatomaceous earth is porous and has humidity-regulating properties, allowing it to regulate humidity in rooms where the wallpaper top coat is applied and prevent condensation. Titanium dioxide 16 has a rutile crystalline structure that lacks sufficient photocatalytic performance. Paraffin wax is a wax with a carbon number distribution of 20-40, a molecular weight of 300-550, and 80-95% by mass of normal paraffin. Paraffin wax has a low viscosity when dissolved, which improves penetration into the substrate and coating performance. Other additives commonly used in interior paints, such as viscosity adjusters, antifoaming agents, UV absorbers, anti-algae and anti-fungal agents, color pigments, and matting agents, can be added to the wallpaper top coat.

[0058] The deodorizing decomposition agent can be blended in an amount of 5 to 45 parts by mass per 100 parts by mass of wallpaper top coat (interior paint). This is because the deodorizing decomposition agent can remove various types of odorous components. If the blending amount of the deodorizing decomposition agent per 100 parts by mass of interior paint is less than 5 parts by mass, the effect of removing odorous components may not be fully exerted. On the other hand, if the blending amount of the deodorizing decomposition agent is more than 45 parts by mass, the blending ratio of the resin emulsion may be relatively reduced, and the physical properties such as the strength of the formed coating film may be deteriorated. In another embodiment, the blending amount of the deodorizing decomposition agent per 100 parts by mass of interior paint may be 10 to 40 parts by mass, and in yet another embodiment, it may be 15 to 30 parts by mass.

[0059] The required amount of interior paint containing a deodorizing decomposition agent is the same as the required amount of interior paint without the deodorizing decomposition agent. For example, the wallpaper top coat listed in Table 1 requires a coating amount of 10 to 50 g / m. 2 (Required amount excluding the mass of the deodorizing decomposition agent).

[0060] The interior paint containing the deodorizing and decomposing agent is applied with a roller or brush to wallpaper 2 or wall materials such as concrete, calcium silicate board, plywood, gypsum board, and porous materials. Examples of porous materials that can be used include inorganic foam materials such as foamed concrete and gypsum foam, resin foam materials such as expanded polystyrene and expanded polyethylene, and composite foam materials of inorganic materials and resins. The applied interior paint forms a film, forming a deodorizing coating film 1. As shown in FIG. 1, the deodorizing coating film 1 contains zinc oxide 13 and aluminum oxide 14 as catalysts, zeolite (fine-diameter zeolite 11 and ultrafine zeolite 12) as adsorbents, and other catalysts such as photocatalyst titanium oxide and / or manganese oxide as catalysts 15.

[0061] The powder deodorizing decomposition agent can be mixed with gravel for paving, stones and sand for imitating dry landscape gardens, sand for incense holders, or sand for filling ashtrays. The slurry deodorizing decomposition agent can be sprayed onto indoor wallpaper 2, concrete wall materials, calcium silicate board, plywood, gypsum board, porous materials, and the like. When the slurry deodorizing decomposition agent is sprayed onto wallpaper 2 or porous materials, the non-volatile components of the deodorizing decomposition agent (aluminum oxide 14, zinc oxide 13, fine zeolite 11, ultrafine zeolite 12, other catalysts 15, etc.) adhere to the surface, removing odorous components.

[0062] In the deodorizing decomposition agent, zinc oxide 13 and aluminum oxide 14 promote the decomposition of odorous components, and aluminum oxide 14, when used in combination with zinc oxide 13, promotes the decomposition of acids such as acetic acid and fatty acids. Zeolite has a SiO2 / Al2O3 molar ratio of 5 to 500, which increases its affinity for non-polar substances and allows it to adsorb a large amount of non-polar organic compounds. Organic compounds that are difficult to decompose by the catalyst are adsorbed by the zeolite, and repeated adsorption and desorption from the zeolite causes repeated contact with zinc oxide 13, aluminum oxide 14, and other catalysts 15 such as photocatalyst titanium oxide and / or manganese oxide, thereby promoting decomposition. Decomposition of odorous components that are easy to decompose is promoted by contact with the catalyst, while decomposition of odorous components that are difficult to decompose is promoted by repeated contact with the catalyst through repeated adsorption and desorption from the zeolite. Therefore, the deodorizing decomposition agent of the embodiment can remove various types of odor components, from those that are easily decomposed to those that are difficult to decompose. [Example]

[0063] The properties of the zeolite used are shown in Table 2, the raw material composition and deodorizing performance of the slurry deodorizing decomposition agent are shown in Tables 3 and 5, and the raw material composition and deodorizing performance of the powder deodorizing decomposition agent are shown in Table 4.

[0064] [Table 2]

[0065] [Table 3]

[0066] [Table 4]

[0067] [Table 5]

[0068] The properties of the raw materials other than zeolite used in the deodorizing and decomposing agent are described below.

[0069] Zinc Oxide 13 Particle size d50:0.5μm Specific surface area 4.0m 2 / g Aluminum Oxide 14 Particle size d50: 12μm Specific surface area 1.1m 2 / g Photocatalytic titanium oxide Crystalline Anatase structure Particle size d50:15nm Specific surface area 350m 2 / g Manganese oxide A Composition Manganese(IV) oxide Particle size d50:2.5μm Specific surface area 150m 2 / g Manganese Oxide B Composition Manganese(IV) oxide Particle size d50:2.5μm Specific surface area 200m 2 / g Manganese Oxide C Composition Manganese(IV) oxide Particle size d50:3.0μm Specific surface area 1000m 2 / g Manganese Oxide D Composition Manganese(IV) oxide Particle size d50:3.0μm Specific surface area 2000m 2 / g Other additives Dispersants, thickeners, antiseptics, antifungal agents, defoamers, etc. These were commercially available products.

[0070] A deodorizing paint was prepared by mixing 20 parts by mass of the liquid deodorizing decomposition agent with 100 parts by mass of the wallpaper top coat listed in Table 1, and the deodorizing paint was applied to vinyl chloride wallpaper 2 measuring 5.8 cm x 5.8 cm at a rate of 16 g / m. 2 The test specimens were coated with a concentration of 100 ppm (wet mass) and dried. The powder deodorizing and decomposing agent was prepared by sprinkling an excess of the deodorizing and decomposing agent onto a 5.8cm x 5.8cm piece of paper adhesive tape (JIS Z 1523:2009) placed at a 45° angle from the horizontal with the adhesive side facing up, and the paper adhesive tape and the deodorizing and decomposing agent attached to the paper adhesive tape were used as test specimens. These test specimens were subjected to gas adsorption tests using the detector tube method and gas chromatography to evaluate the deodorizing and decomposing agent.

[0071] (Detector Tube Act) Based on the SEK Mark textile product certification standard (odor elimination test) of the Japan Textile Evaluation Technology Council, a test specimen (5.8cm x 5.8cm) was placed in a Tedlar bag, and 1L of odorous gases (ammonia, acetic acid, hydrogen sulfide, methyl mercaptan, formaldehyde, acetaldehyde) was sealed inside to achieve the specified initial concentration. After that, the component concentrations were measured using a detector tube after 2 hours and 24 hours, and the gas decay rates after 2 hours and 24 hours were calculated. The gas decay rate was then evaluated as follows: 70% or more and 100% was indicated as ◎, 40% or more but less than 70% was indicated as 〇, 10% or more but less than 40% was indicated as △, and less than 10% was indicated as ×.

[0072] (Chromatography) Test pieces (5.8 cm x 5.8 cm) and 1 μL of reagents (toluene, xylene, ethylbenzene, styrene, and tetradecane) were sealed in a 5-liter Tedlar bag and left to stand in a dark room at 23°C for 24 hours. The concentrations were measured by gas chromatography (Shimadzu GC-2014 gas chromatograph) and the gas decay rates were calculated. The gas decay rates were evaluated as follows: 70% to 100% (◎), 40% to 70% (〇), 10% to 40% (△), and less than 10% (×). The reagents used in the test were five substances that are likely to vaporize at room temperature out of the 13 substances designated by the Ministry of Health, Labor, and Welfare (MHLW) (PSEHB Notification No. 0117-1, January 17, 2019, "Guideline Values ​​for Indoor Concentrations of Chemical Substances in Indoor Air").

[0073] (Test example) Table 3 (Test Examples 1-11) and Table 5 (Test Examples 21-27) show the raw material blends and deodorizing performance of slurry deodorizing decomposition agents, and Table 4 (Test Examples 12-20) shows the raw material blends and deodorizing performance of powder deodorizing decomposition agents. Test Examples 1-6, 8, 11-13, 15, and 17-27 are working examples, and Test Examples 7, 9, 10, 14, and 16 are comparative examples. Note that the evaluation of "x" in the tables indicates that the gas attenuation rate of some odor components is poor, and does not mean that the example is out of the ordinary.

[0074] (Test Examples 1 to 6) In Test Examples 1 to 6, the zeolites contained in the slurry deodorizing and decomposing agent were evaluated by changing the content ratio of zeolite A, which is fine zeolite 11 (pore diameter of 0.65 to 0.9 nm), and zeolite B, which is ultrafine zeolite 12 (pore diameter of 0.3 to 0.6 nm). Test Examples 1 to 6 contained zinc oxide 13 and aluminum oxide 14 as catalysts, and further contained photocatalytic titanium oxide as other catalyst 15.

[0075] Test Example 3 contained zeolite A:zeolite B in a ratio of 100:100. In Test Example 3, the gas decay rates of odorous component gases were as follows: ammonia after 2 hours and 24 hours was 70% to 100% (◎), formaldehyde after 2 hours and 24 hours was 70% to 100% (◎), hydrogen sulfide after 2 hours was 40% to less than 70% (○), and after 24 hours was 70% to 100% (◎), acetaldehyde after 2 hours was 10% to less than 40% (△), and after 24 hours was 40% to less than 70% (○), methyl mercaptan after 2 hours was 10% to less than 40% (△), and after 24 hours was 40% to less than 70% (○), and acetic acid after 2 hours was 70% to 100% (◎). In addition, in Test Example 3, among the five substances that would vaporize at room temperature, the gas decay rate after 24 hours for toluene was 10% or more but less than 40% (△), for ethylbenzene it was 40% or more but less than 70% (○), for styrene it was 70% or more but less than 100% (◎), for xylene it was 40% or more but less than 70% (○), and for tetradecane it was 70% or more but less than 100% (◎). Test Example 3 was able to remove various types of odorous components. A graph showing the deodorization rate of odorous components in Test Example 3 is shown in Figure 2.

[0076] Test Example 2 contained zeolite A:zeolite B in a ratio of 100:55, and Test Example 1 contained only zeolite A. Test Examples 2 and 1 were able to remove various types of odorous components. Furthermore, Test Examples 2 and 1 confirmed that zeolite A, which is a small-diameter zeolite 11 (pore diameter of 0.65 to 0.9 nm), is capable of attenuating all odorous component gases and five substances that would vaporize at room temperature.

[0077] In Test Examples 4 to 6, the content ratio of zeolite B was gradually increased (in Test Example 6, zeolite A:zeolite B=100:170). In Test Examples 4 to 6, zeolite A, which is a fine zeolite 11 (pore diameter of 0.65 to 0.9 nm), and zeolite B, which is an ultrafine zeolite 12 (pore diameter of 0.3 to 0.6 nm), were able to effectively attenuate up to five substances that would vaporize at room temperature from odorous component gases, and were able to remove various types of odorous components.

[0078] (Test Example 7) Test Example 7 is a test example in which zeolite was omitted from Test Examples 1 to 6. Test Example 7 confirmed that ammonia, formaldehyde, and hydrogen sulfide could be attenuated by the catalyst and photocatalyst, although the attenuation rate was inferior. Ammonia, formaldehyde, and hydrogen sulfide are considered to be odor components that are easily decomposed. However, the five substances that would vaporize at room temperature, acetaldehyde, and methyl mercaptan could not be attenuated. Since the five substances that would vaporize at room temperature, acetaldehyde, and methyl mercaptan could be attenuated in Test Examples 1 to 6, they are considered to be odor components that are difficult to decompose, and whose decomposition is promoted by repeated adsorption and desorption from zeolite and repeated contact with the catalyst.

[0079] (Test Example 8) Test Example 8 contained only zeolite B, which is ultrafine zeolite 12 (pore diameter 0.3 to 0.6 nm), as the adsorbent. Test Examples 1 to 6 were able to attenuate methyl mercaptan, xylene, and tetradecane, but Example 8 was unable to do so. Therefore, it is believed that zeolite B has inferior adsorption properties for these compounds (methyl mercaptan, xylene, and tetradecane). From the above, it can be seen that the zeolite used in the deodorizing decomposition agent of the embodiment can attenuate a greater variety of odor components by using zeolites with pores of 0.3 to 0.9 nm in diameter, or by combining zeolites with pores of 0.3 to 0.6 nm in diameter and pores of 0.65 to 0.9 nm in diameter, compared to zeolites with pores of 0.3 to 0.6 nm in diameter.

[0080] (Test Examples 9 and 10) Test Example 9 is a test example in which the aluminum oxide 14 catalyst was removed from Test Example 3. Test Example 10 is a test example in which the zinc oxide 13 catalyst was removed from Test Example 3. Test Examples 9 and 10 showed inferior attenuation rates for some of the odor component gases and some of the five substances that would vaporize at room temperature compared to Test Example 3, and it was confirmed that in order to efficiently increase the attenuation rate, not only zinc oxide 13 but also aluminum oxide 14 is necessary as a catalyst.

[0081] (Test Example 11) In Test Example 11, Zeolite F with a pore diameter of 0.2 nm (0.3 nm or less) was used. Test Example 11 was able to attenuate ammonia, formaldehyde, hydrogen sulfide, and acetic acid, as well as ethylbenzene, styrene, xylene, and tetradecane. However, it was unable to attenuate acetaldehyde, methyl mercaptan, and toluene. This is thought to be due to the small diameter of the zeolite pores.

[0082] (Test Examples 12-18) Test Examples 12 to 18 evaluated powder deodorizing and decomposing agents using different types of zeolite. Test Example 12 used zeolite A, which is fine zeolite 11 (pore diameter of 0.65 to 0.9 nm), as the zeolite, and corresponds to Test Example 1, a slurry deodorizing and decomposing agent. Test Example 13 used zeolite B, which is ultrafine zeolite 12 (pore diameter of 0.3 to 0.6 nm), as the zeolite, and corresponds to Test Example 8, a slurry deodorizing and decomposing agent. The results of the gas adsorption test were similar for Test Example 1 and Test Example 13, which is similar to Test Example 8. Therefore, it was confirmed that the powder deodorizing and decomposing agents and the slurry deodorizing and decomposing agents exhibit equivalent adsorption performance and can be compared with each other.

[0083] Test Example 15, which used zeolite D with a pore diameter of 0.7 nm and a silica / alumina molar ratio of 500, exhibited adsorption performance (decay rate) equivalent to that of Test Example 12 (Test Example 1). Test Example 17, which used zeolite F with a pore diameter of 0.2 nm and a silica / alumina molar ratio of 40, exhibited inferior adsorption performance for acetaldehyde and methyl mercaptan, as well as toluene, styrene, and tetradecane, compared to Test Example 12 (Test Example 1). This is presumably due to the smaller pore diameter. Test Example 18, which used zeolite G with a pore diameter of 1.2 nm and a silica / alumina molar ratio of 50, exhibited inferior adsorption performance for acetaldehyde and methyl mercaptan compared to Test Example 12 (Test Example 1). This is presumably due to the larger pore diameter.

[0084] Test Example 14, which used zeolite C with a silica / alumina molar ratio of 2.5, was inferior in adsorption of odorous gases because zeolite C has a high affinity for polar substances, and had the same adsorption performance as Test Example 7, which did not contain zeolite. Test Example 16, which used zeolite E with a silica / alumina molar ratio of 1000, also had poor adsorption performance, although the reason is unclear.

[0085] (Test Examples 19 and 20) Test Example 19 is a powder deodorizing decomposition agent containing zeolite A and zeolite B in a ratio of 100:100, and is a deodorizing decomposition agent equivalent to Test Example 3 in terms of slurry deodorizing decomposition. Test Example 19 was able to exhibit the same adsorption ability (decay rate) as Test Example 3. Test Example 20 is a deodorizing decomposition agent obtained by removing the titanium oxide photocatalyst from Test Example 19 as the other catalyst 15. Since Test Example 20 does not contain titanium oxide photocatalyst, its adsorption ability for formaldehyde, hydrogen sulfide, acetaldehyde, and methyl mercaptan, as well as ethylbenzene, styrene, xylene, and tetradecane was slightly inferior to Test Example 19 (Test Example 3).

[0086] (Test Examples 21-23) Test Example 21 is the same as Test Example 3, and Test Examples 22 and 23 are the same as Test Example 21 (Test Example 3), except that the other catalyst 15 is changed from photocatalytic titanium oxide to manganese oxide. Test Example 22 uses manganese oxide with a specific surface area of ​​200 m 2 / g of manganese oxide B was used. 2 / g of manganese oxide C was used.

[0087] Test Examples 22 and 23 demonstrate that excellent decomposition of odorous components is achieved even when manganese oxide is used as the catalyst 15. Specifically, for odorous component gases, the gas decay rates of ammonia after 2 and 24 hours were 70% to 100% (◎), formaldehyde after 2 and 24 hours were 70% to 100% (◎), hydrogen sulfide after 2 and 24 hours were 70% to 100% (◎), acetaldehyde after 2 hours was 10% to less than 40% (△), and after 24 hours was 40% to less than 70% (○), methyl mercaptan after 2 and 24 hours was 70% to 100% (◎), and acetic acid after 2 and 24 hours was 70% to 100% (◎). In addition, in Test Examples 22 and 23, for the five substances that are likely to vaporize at room temperature, the gas decay rate after 24 hours for toluene was 10% or more and less than 40% (△), for ethylbenzene was 10% or more and less than 40% (△), for styrene was 40% or more and less than 70% (○), for xylene was 10% or more and less than 40% (△), and for tetradecane was 70% or more and less than 100% (◎) after 24 hours.

[0088] (Test Examples 24-27) In Test Examples 24 to 27, the other catalyst 15 was a combination of photocatalytic titanium oxide and manganese oxide. In Test Example 24, manganese oxide with a specific surface area of ​​150 m 2 / g of manganese oxide A was used, and in Test Example 25, manganese oxide with a specific surface area of ​​200 m 2 / g of manganese oxide B was used, and in Test Example 26, manganese oxide with a specific surface area of ​​1000 m 2 / g manganese oxide C was used, and in Test Example 27, manganese oxide with a specific surface area of ​​2000 m 2 / g of manganese oxide D was used.

[0089] Test Examples 24 to 27 were able to remove various types of odorous components. [Explanation of symbols]

[0090] 1 Deodorizing coating 2 Wallpaper 11 Fine zeolite 12 Ultrafine Zeolite 13 Zinc oxide 14 Aluminum Oxide 15 Other catalysts (photocatalytic titanium oxide and / or manganese oxide) 16 Titanium dioxide

Claims

1. Contains zinc oxide, aluminum oxide and zeolite, and the SiO 2 / Al 2 O 3 A deodorizing and decomposing agent characterized in that the molar ratio is 5 to 500.

2. 2. The deodorizing and decomposing agent according to claim 1, wherein the zeolite has pores with a diameter of 0.3 to 0.9 nm.

3. 2. The deodorizing and decomposing agent according to claim 1, wherein the zeolite is a combination of zeolite having pores with a diameter of 0.3 to 0.6 nm and zeolite having pores with a diameter of 0.65 to 0.9 nm.

4. 2. The deodorizing and decomposing agent according to claim 1, further comprising photocatalytic titanium oxide and / or manganese oxide.

5. A deodorizing paint comprising the deodorizing decomposition agent according to any one of claims 1 to 4.

6. A deodorizing porous material having the deodorizing decomposition agent according to any one of claims 1 to 4 on its surface.

7. A deodorizing interior material characterized by having the deodorizing and decomposing agent according to any one of claims 1 to 4 on its surface.

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