JP2008100862A - Deodorization building material having antibacterial and antifungal performance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deodorization building material composition obtained by imparting antibacterial and antifungal performance to ALC (Autoclaved Light-weight Concrete) essentially consisting of tobermorite as a crystalline calcium silicate hydrate. <P>SOLUTION: The deodorization building material essentially consisting of tobermorite comprises a metal salt of a metal(s) selected from silver, copper and zinc of 0.001 to 5 wt.% and one or more kinds of compounds selected from halogenated aromatics and halogenated alkaloids of 0.005 to 3 wt.%, and also, the effective specific surface area measured by a nitrogen gas adsorption method is 15 to 50 m<SP>2</SP>/g. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a deodorant building material in which antibacterial and antifungal properties are imparted to a porous material mainly composed of tobermorite which is a crystalline calcium silicate hydrate.

Porous material mainly composed of tobermorite, which is a crystalline calcium silicate hydrate, has high strength, high durability, high fire resistance, excellent heat insulation, and is lightweight, so as lightweight lightweight concrete (ALC), It is widely used as a building material for houses and buildings, and its production volume in recent years has reached more than 2 million m ³ / year. However, as the production volume increases, the scrap generated from factories and construction sites continues to increase at the same time. In addition, a large amount of ALC waste has been generated from the demolished houses. For this reason, effective use of waste materials generated from scraps and demolished houses leads to reduction of industrial waste, and has become important in terms of effective use of resources and environmental protection.
Up to now, after pulverizing ALC waste material, it is disclosed in Non-Patent Document 1 that fine particles are used as raw materials for roadbed materials, siliceous fertilizers, soil improvement materials and the like. . Moreover, since the thing with a coarse particle size has the state of a porous body and has a deodorizing function, there also exists a use as a odor reduction building material.

Recent housing has been highly insulated and highly airtight, so it has a better thermal environment than the old houses, but it tends to reduce ventilation. Therefore, installation of mechanical ventilation is obligatory, but it is extremely difficult to uniformly ventilate the entire indoor space. In some cases, there is a space where ventilation is hardly performed. For this reason, there is a problem that the odor generated in daily life does not decrease easily, and there is a possibility that condensation will occur in window frames, wall corners, washrooms, bathrooms, etc. due to moisture remaining in the room, leading to the generation of mold. It was. In addition, improvement of the thermal environment may be advantageous for the growth of bacteria other than molds, and may cause disease.
Examples of mold damage in the living environment include allergic diseases, urticaria infections, and dietary poisoning. In addition, there are people who are sensitive to chemicals in the case where mold is observed or a house with a musty odor. Sick house symptoms may develop. Bacteria can cause a variety of infections, and care may be needed, especially for children and older people with poor resistance.

If the odor reduction effect can be achieved without lowering the thermal environment, it is considered that the indoor air quality can be improved. One candidate for the odor reducing effect is a porous material.
In fact, the porous material adsorbs odors as disclosed in, for example, Patent Document 1 and the like. However, a material having a deodorizing performance easily adsorbs organic substances and requires a humidity control function. Since moisture is easily adsorbed at the time of humidity, mold and fungi are generated due to the adsorbed organic matter and moisture, and there are cases where problems are recognized from the viewpoint of air quality hygiene. Therefore, it is not possible to improve the comfort of indoor air quality by mere deodorizing performance, and providing antibacterial and antifungal performance is important in terms of improving the comfort of indoor air quality. There has been a demand for a deodorant building material having antibacterial and antifungal properties while retaining its properties.
In terms of antibacterial performance, metal ions are excellent, but there is a drawback that they are weak against light such as silver and chloride ions, and there is a need for improvement because performance drops. In addition, since metal ions alone are not sufficient for molds, it is necessary to use an organic mold-proofing agent having excellent mold-proofing performance in order to achieve antibacterial and mold-proofing.

AIST news (enlarged version): No.12, Page.3 (2004) Japanese Patent No. 3212588

  An object of the present invention is to provide a deodorant building material composition in which antibacterial and antifungal properties are imparted to a porous material mainly composed of tobermorite which is a crystalline calcium silicate hydrate.

As a result of intensive studies to solve the above problems, the present inventors have completed the present invention.
Odor reduction is manifested by adsorption of odor to a porous material having a large surface area, so that the material preferably has a large surface area. On the other hand, in order to develop antibacterial and antifungal properties, the effect is manifested by adding more antibacterial and antifungal agents, but antibacterial and antifungal agents are intended to develop more antibacterial and antifungal effects. The more the amount of is added, the more porous portions of the material are coated, so the surface area of the material is reduced and the odor reduction effect is reduced. The above indicates that there is a trade-off relationship between the expression of the odor reducing effect and the expression of antibacterial and antifungal performance. For this reason, in the present invention, intensive studies were conducted on optimizing conditions for expressing both the odor reduction effect in practical use and the antibacterial and antifungal performance.
In other words, a porous material mainly composed of tobermorite supports metal ions as an antibacterial agent to develop antibacterial performance, and while adding a fungicidal agent to develop antifungal performance, the porous material after blending By keeping the effective specific surface area of 15 to 50 m ² / g, it was found that all requirements for deodorizing performance, antibacterial performance, and antifungal performance were satisfied, and the present invention was achieved.
The present invention is as follows.
(1) 0.001 to 5% by weight of a metal salt of a metal selected from silver, copper and zinc, or 0.005 to 3% by weight of one or more compounds selected from halogenated aromatics and alkaloids And a deodorant building material mainly composed of tobermorite having an effective specific surface area of 15 to 50 m ² / g measured by a nitrogen gas adsorption method.

  According to the present invention, it is possible to provide a deodorant building material having antibacterial and antifungal properties.

Hereinafter, the present invention will be specifically described.
First, the porous material mainly composed of tobermorite of the present invention will be described.
The deodorant in the present invention is mainly composed of tobermorite, and the tobermorite which is a porous material is composed of silica (SiO ₂ ), quicklime (CaO), cement (CaO-SiO ₂ -Al ₂ O ₃ system) and aluminum powder. The main raw material was cured in an autoclave at 180 ° C. under 10 atm of saturated water vapor for about 10 hours.
It is known from X-ray diffraction data and the like that this tobermorite has a layered crystal structure and has a stitch structure composed of crystals. ALC is a representative example of a porous material mainly composed of tobermorite.
The porous material mainly composed of tobermorite used in the present invention is a fresh product obtained immediately after the manufacturing process of the factory or the end material mainly composed of tobermorite, and is an old waste material generated at the time of dismantling of the house. The specific surface area measured by the nitrogen gas adsorption method may be 15 m ² / g or more, preferably 15 m ² / g or more, more preferably 16 m ² / g or more. On the other hand, the upper limit of the specific surface area is 50 m ² / g or less.

The porosity may be 50% or more, preferably 60% or more, and more preferably 70% or more. Moreover, although ALC changes with time and calcium carbonate is generated, there is no problem if the content is 20% or less. In addition, the ratio with respect to the total volume of 1 micrometer or less pores calculated | required from the mercury porosimeter is about 40%.
As a usage form in the present invention, it can be formed into a fine powder form, a porous particle form, or an appropriate form for practical use. When fine powder is used, ALC is pulverized to an appropriate particle size of 10 ^-9 m or more and less than 10 ^-4 m and used as it is, or when it is made porous, the fine particles are 10 ^-4. It can be used after being formed into particles of m to 10 ⁻² m. Further, it is also preferable to use the fine powder or porous particles in the form of a plate, a sphere, a cylinder, or a honeycomb.

For fine powder and porous particles, it can be packed in a column or the like and built into a ventilation system, or packed in a highly air permeable material (for example, fibrous material) and placed under the floor or behind the ceiling. However, when used as a building material, it is preferable to form and cure the ALC powder again to form a plate-like molded body (for example, 30 cm square).
The deodorant building material of the present invention is characterized in that the tobermorite contains 0.001 to 5% by weight of a metal salt of a metal selected from silver, copper and zinc. In this metal salt, the metal mainly functions as an antibacterial agent.
Specific examples of the metal salt include silver benzoate, silver acetate, silver nitrate, silver sulfate, copper sulfate (II), copper chloride (II), zinc sulfate, zinc chloride and the like having any one of silver, copper and zinc Of these, one or more of them are supported on a porous material mainly composed of tobermorite. Silver salts are preferred.

As a loading method, a metal salt is dissolved in pure water and then added to tobermorite and vacuum-dried at 80 ° C., or a metal complex is dissolved in pure water and then sodium thiosulfate is dissolved to form a metal complex. A method of adding to a base material and vacuum drying at 80 ° C. can be mentioned, but either method may be used. As for the method of adding to the plate-shaped molded article, the metal salt as an antibacterial agent is dissolved in pure water or the metal salt is dissolved in pure water and then sodium thiosulfate is dissolved to form a metal complex, and then the molded article is impregnated. And vacuum drying at 80 ° C. The addition amount of these metal compounds may be in the range of 0.001 to 5% by weight, preferably 0.01 to 1% by weight, particularly preferably 0.05% to 0.5%. Range.
The deodorant building material of the present invention contains 0.005 to 3% by weight of one or more organic compounds selected from halogenated aromatics and halogenated alkaloids in addition to the above metal salt. Also features. The above compound functions mainly as a fungicide.

  Specific examples of the organic compound include 2,2,4′-trichloro-2′-hydroxydiphenyl ether (generic name: triclosan), 1,6-di- (4′-chlorophenylbiguanide) -hexane dihydrochloride ( General name: Chlorhexidine hydrochloride), p-chloro-m-xylenol (generic name: chlorxylenol), aromatic compounds containing halogen in the aromatic ring, catechins, hinokitiol, chitosan (β-poly-N-acetyl-D) -Glucosamine), a compound contained in natural products such as bis [1-hydroxy-2 (1H) pyridinethionate] zinc (generic name: zinc pyrithione), 2,3,5,6-tetrachloro-4- (methyl Pyridine compounds such as sulfonyl) pyridine, 2- (4-thiazolyl) -benzimidazo (Generic name: thiabendazole), methyl-2-benzimidazole carbamate (generic name: carbendazine), benzimidazole compounds, 5-chloro-2-methyl-4-isothiazolin-3-one, 2-methyl- N-haloalkylthio such as 4-isothiazolin-3-one, N-trichloromethylthiotetrahydrophthalimide (generic name: captan), N- (fluorodichloromethylthio) -phthalimide (generic name: fluorophorpet) Compounds, nitrile compounds such as 2,4,5,6-tetrachloroisophthalonitrile (generic name: chlorothalonil), organic arsenic compounds such as 10-10′-oxybisphenoxyarsine, diiodomethyl-p-tolylsulfo And organic iodine compounds such as

Among these, 1 type, 2 or more types, or 1 type or 2 types or more of commercially available chemical | medical agents containing these are contained in a deodorant building material. Particularly preferred are zinc pyrithione, 2,3,5,6-tetrachloro-4- (methylsulfonyl) pyridine, or a drug containing these. The content of these fungicides may be in the range of 0.005 to 3% by weight, preferably 0.01 to 1% by weight, particularly preferably 0.05 to 0.5% by weight. % Range.
Examples of the method of adding to the deodorant building material include a method of dissolving or dispersing the antifungal agent in water and then adding it to a base material and vacuum drying at 80 ° C. As for the method of adding to the plate-shaped molded body, a method of dissolving or dispersing a mold preventive agent in pure water, impregnating the molded body, and vacuum drying at 80 ° C. can be mentioned.

When adding antibacterial and antifungal agents in combination, dissolve the antibacterial metal salt in pure water or further dissolve sodium thiosulfate into a metal complex and dissolve the antifungal agent in water. Alternatively, a method of dispersing and adding to a base material or impregnating a molded body and vacuum drying at 80 ° C. can be mentioned.
The specific surface area of the deodorant building material of the present invention is 15 m ² / g or more and 50 m ² / g or less calculated from a BET plot using a nitrogen gas adsorption method using Shimadzu Micromeritex (ASAP-2400). And the effect is manifested. In order to exhibit a more remarkable effect, the specific surface area is preferably 15 m ² / g or more and 50 m ² / g or less.
The measurement was carried out after taking 1 g of a deodorant building material sample in a standard cell and degassing it at room temperature for about 15 hours in the pretreatment section of the apparatus.

The effective specific surface area in the present invention is a specific surface area obtained when measured as a deodorant building material after adding a metal salt and an organic compound to a porous material mainly composed of tobermorite, and is covered with an antibacterial and antifungal agent. It represents the specific surface area of tobermorite remaining.
Antibacterial evaluation was performed using a bacterial resistance test by the shake flask method.
That is, 0.5 g of a sample is put in a sterilized flask, and Escherichia coli is adjusted to 10 ⁵ to 10 ⁶ cells / ml with a diluted broth. The viable count of the adjusted bacterial solution is measured, that is, the sample is diluted 10 to 10 ² to 10 ⁵ times with sterile physiological saline, dispensed 1 ml each in a petri dish, and then a normal agar medium may be added. Stir and let stand, and after the medium has solidified, put it in a thermostat adjusted to 28 ± 2 ° C and incubate for 2 days. After culturing, count the number of colonies of the grown bacteria to determine the number of viable bacteria. This is the initial value. 50 ml of the adjusted bacterial solution is put into each test specimen and cultured in a shaker incubator adjusted to 35 ± 2 ° C. and amplitude of 120 to 130 rpm. The number of viable bacteria in each test sample after 30 minutes from the start of culture is measured, and the sterilization rate (bacterial sterilization rate (%) = {(initial value) − (viable cell count after culturing each test sample)} ÷ (initial value) x 100), the antibacterial activity of the sample was evaluated.

  The anti-mold evaluation was performed according to JIS-Z-2911-2000. A hole with a diameter of 3 cm was made in the center of the agar plate medium, and the sample was put to a thickness equivalent to that of the medium. From above, a mixed spore suspension containing Aspergillus niger, Penicillium citrium, Chaetomium globosum, Myrothecium verrucaria, Cladosporium cladosporioides, Trichoderma viride is uniformly sprinkled on the medium and the sample, and the lid is covered with 28 ±. The cells were cultured in a thermostat adjusted to 2 ° C. and a humidity of 90% or more. The growth state of the mold after 3 days was evaluated based on each criterion. The criterion is 0 if no hyphae growth is observed in the inoculated part of the test piece, and the area of the hyphae growing part observed in the inoculated part of the test piece does not exceed 1/3 of the total area. 1. The area of the growing part of the mycelium observed in the inoculated part of the test piece is represented by 2 when it exceeds 1/3 of the total area. That is, the smaller this value is, the better the anti-mold effect is.

  The odor was evaluated using a 20 l chamber. 100g of beef, 30ml of sauce and 10ml of oil are cooked in a frying pan, and the generated baked meat odor is 15cm above the frying pan using a sampling bag (10l) placed in a reduced suction case as shown in FIG. Collected at The generated odor component was then removed from the sampling case and connected to a 20 l small chamber containing two 147 mm square ALC plates as shown in FIG. 10 l of the collected odor was put in a chamber, the three-way valve and the two-way valve were closed and sealed, and allowed to stand for 1 hour. After 1 hour, an odor bag with a volume of 3 liters was attached to the outlet of the two-way valve, the valve was opened, the three-way valve was opened to the atmosphere, and odorless air was allowed to flow. Five subjects who were confirmed to have normal olfaction smelled the odors collected in the odor bags, and evaluated by a six-step odor intensity method (average value of five people).

The six-level odor intensity is an odor intensity display method used in the malodor prevention method. Specifically, the odor is 0, the odor that can be finally detected (detection threshold concentration), and what odor is? This is a method of expressing the weak odor (cognitive threshold concentration) that can be recognized as 2, the odor that can be easily detected as 3, the strong odor as 4, and the strong odor as 5 as numerical values. The smaller this number is, the weaker the odor is.
For the odor component of yakiniku, the same operation as the odor evaluation described above was performed, and after 1 hour of standing, the odor component was added to the adsorbent (Carbopack B and Carbosieve S-III manufactured by SUPELCO) at 0.5 ml / After collecting 10 liters at a flow rate of min, the adsorbent is heated with a heat desorption device, and the desorbed components are removed by a gas chromatograph mass spectrometer (GC is manufactured by Agilent, and mass spectrometer is manufactured by JEOL Automass-SUN ) And an attachment of “smell sniffing” to the detector part of the GC device, and identification was performed using “GC-sniff sniffing” in which odor components are measured by human smell. There were many odor components in yakiniku, but roughly speaking, the main components were aldehydes that felt as a fatty odor to human olfaction and sulfur-containing compounds that felt as a garlic odor.

[Example 1]
A solution in which silver ion (Wako Pure Chemical Industries, Ltd .: silver nitrate), an antibacterial agent, is dissolved in distilled water, and a pyridine-based drug (Sanai Oil Co., Ltd .: Sun Aisole 200), an antibacterial and antifungal agent, is dispersed. Then, after adding silver nitrate and sun isol 200 to 0.1% by weight with respect to the ALC of the waste material obtained at the time of dismantling with an effective specific surface area of 16.4 m ² / g, vacuum drying at 80 ° C. for 3 hours. went. The effective specific surface area after vacuum drying was 16.2 m ² / g. About ALC which added this antibacterial agent and antibacterial and antifungal agent, one part was used for antibacterial and antifungal evaluation, and another part was cut into 147 mm square (two sheets) and used for odor evaluation.
The antibacterial performance was determined from the sterilization rate after 30 minutes as described above, and it had a sterilization rate of 95% and an antibacterial effect was observed. Moreover, although the antifungal performance was evaluated according to the above-mentioned criteria, the evaluation result was 0, as the mycelium did not grow even around the ALC as shown in FIG. Thus, the mold prevention effect was also seen. That is, both antibacterial and antifungal effects were recognized.
On the other hand, although the odor was evaluated as described above, the average odor intensity when the ALC was not added was 4.3, whereas the ALC subjected to the antibacterial and antifungal treatment was 1.9. It was found that the odor of yakiniku was greatly reduced.
As described above, by adding 0.1% by weight of the antibacterial agent and the antibacterial and antifungal agent to ALC, the antibacterial and antifungal effects were recognized, and the deodorizing effect for reducing the odor of the yakiniku was also recognized. .

[Example 2]
A solution in which zinc ion (Wako Pure Chemical Industries, Ltd .: zinc chloride), an antibacterial agent, is dissolved in distilled water, and a pyridine-based drug (Sanai Oil Co., Ltd .: Sun Aisole 200), an antibacterial and antifungal agent, is dispersed. Was added so that zinc chloride and sunisol 200 would each be 0.1% by weight with respect to the ALC of the waste material obtained at the time of dismantling with an effective specific surface area of 16.4 m ² / g, and then vacuumed at 80 ° C. for 3 hours. Drying was performed. The effective specific surface area after vacuum drying was 16.3 m ² / g. About ALC which added this antibacterial agent and antibacterial and antifungal agent, one part was used for antibacterial and antifungal evaluation, and another part was cut into 147 mm square (two sheets) and used for odor evaluation.
The antibacterial performance was determined from the sterilization rate after 30 minutes as described above, and it had a sterilization rate of 95% and an antibacterial effect was observed. Moreover, although the antifungal performance was evaluated according to the above-mentioned criteria, the evaluation result was 0, and the antifungal effect was also observed. That is, both antibacterial and antifungal effects were recognized.
On the other hand, although the odor was evaluated as described above, the average odor intensity when the ALC was not added was 4.2, whereas the ALC subjected to the antibacterial / antifungal treatment was 2.0, It was found that the odor of yakiniku was greatly reduced.
As described above, by adding 0.1% by weight of the antibacterial agent and the antibacterial and antifungal agent to ALC, the antibacterial and antifungal effects were recognized, and the deodorizing effect for reducing the odor of the yakiniku was also recognized. .

[Comparative Example 1]
About the ALC of the waste material obtained at the time of dismantling with an effective specific surface area of 16.4 m ² / g used in Example 1, a part was used for antibacterial and fungicidal evaluation, and another part was cut into 147 mm square (2 sheets) Used for odor evaluation.
The antibacterial performance was determined from the sterilization rate after 30 minutes as described above, but it had only a sterilization rate of 12% and no antibacterial effect was observed. Moreover, although antifungal performance was also evaluated based on the above-mentioned criteria, as shown in FIG. 4, the mycelia grew on ALC and the determination was 1. Thus, the antifungal effect was not recognized. That is, antibacterial and antifungal effects were not recognized.
On the other hand, the odor was evaluated as described above. The average odor intensity when ALC was not added was 4.3, whereas it was 2.2 when ALC was added. A reduction was observed.
As described above, when the antibacterial agent and the antibacterial / antifungal agent were not added to the ALC, although the deodorizing effect for reducing the odor of the grilled meat was recognized, the antibacterial and antifungal effects were not recognized.

[Comparative Example 2]
A solution in which silver ion (Wako Pure Chemical Industries, Ltd .: silver nitrate), an antibacterial agent, is dissolved in distilled water, and a pyridine-based drug (Sanai Oil Co., Ltd .: Sun Aisole 200), an antibacterial and antifungal agent, is dispersed. Then, after adding silver nitrate and sun isol 200 to 6% by weight with respect to ALC having an effective specific surface area of 16.4 m ² / g, vacuum drying was performed at 80 ° C. for 3 hours. The effective specific surface area after vacuum drying decreased to 14.7 m ² / g. About ALC which added this antibacterial agent and antibacterial and antifungal agent, one part was used for antibacterial and antifungal evaluation, and another part was cut into 147 mm square (two sheets) and used for odor evaluation.
As described above, the antibacterial performance was determined from the sterilization rate after 30 minutes, and it had a sterilization rate of almost 100%, and an antibacterial effect was observed. Further, the antifungal performance was evaluated according to the above-mentioned criteria, but the evaluation result was 0, and the antifungal effect was also observed. That is, both antibacterial and antifungal effects were recognized.
On the other hand, although the odor was evaluated as described above, the average odor intensity when the ALC was not added was 4.3, whereas the ALC subjected to the antibacterial / antifungal treatment was 3.6, Although the odor of the grilled meat was slightly reduced, the great reduction effect as in Example 1 was not recognized. When there are many antibacterial agents and antibacterial / antifungal agents, it is presumed that the sites that adsorb the odor of ALC were inhibited by the antibacterial agents and the antibacterial / antifungal agents.
As described above, by adding 6% by weight of the antibacterial agent and the antibacterial / antifungal agent to ALC, the antibacterial and antifungal effects were recognized, but the deodorizing effect for reducing the odor of the yakiniku was reduced.

[Comparative Example 3]
A solution obtained by dissolving silver ions (Wako Pure Chemical Industries, Ltd .: silver nitrate) as an antibacterial agent in distilled water is 0.3% by weight based on ALC having an effective specific surface area of 16.4 m ² / g. Then, vacuum drying was performed at 80 ° C. for 3 hours. The effective specific surface area after vacuum drying was 16.4 m ² / g. About ALC which added this antibacterial agent, one part was used for antibacterial and antifungal evaluation, and another part was cut into 147 mm square (two sheets) and used for odor evaluation.
As described above, the antibacterial performance was determined from the sterilization rate after 30 minutes. Although the antibacterial performance was almost 100% and the antibacterial effect was observed, the antifungal performance was determined according to the above criteria. Although evaluated, the evaluation result was 1, and the antifungal effect was inferior to that of Example 1.
On the other hand, although the odor was evaluated as described above, the average odor intensity when the ALC was not added was 4.3, whereas the ALC subjected to the antibacterial and antifungal treatment was 1.8. It was found that the odor of yakiniku was greatly reduced.
As described above, when only 0.3% by weight of the antibacterial agent was added to ALC, although the deodorizing effect and the antibacterial effect for reducing the odor of yakiniku were recognized, the antifungal effect was inferior.

[Comparative Example 4]
A solution obtained by dispersing a pyridine-based drug (Sanai Oil Co., Ltd .: Sun Aisole 200), an antibacterial and antifungal agent, in distilled water is 0.3 for an ALC having an effective specific surface area of 16.4 m ² / g. After the addition so that the amount became wt%, vacuum drying was performed at 80 ° C. for 3 hours. The effective specific surface area after vacuum drying was 16.2 m ² / g. About ALC which added this antibacterial agent and antibacterial and antifungal agent, one part was used for antibacterial and antifungal evaluation, and another part was cut into 147 mm square (two sheets) and used for odor evaluation.
The antibacterial performance was determined from the sterilization rate after 30 minutes as described above, but had only a sterilization rate of 58.3%, and the antibacterial effect was inferior to that of Example 1. Further, the antifungal performance was evaluated based on the above-mentioned criteria, but the evaluation result was 0, and the antifungal effect was observed.
On the other hand, although the odor was evaluated as described above, the average odor intensity when the ALC was not added was 4.3, whereas the ALC subjected to the antibacterial / antifungal treatment was 2.0, It was found that the odor of yakiniku was greatly reduced.
As described above, when only 0.3% by weight of the antibacterial and antifungal agent was added to ALC, the antibacterial effect was inferior although the deodorizing effect and the antifungal effect of reducing the odor of yakiniku were recognized.

  Because it has deodorant performance and antibacterial and antifungal properties, it can be used as a deodorant material with antibacterial and antifungal properties, and it is necessary to improve the comfort of indoor air quality. Is likely to meet

It is explanatory drawing about the collection method of the generated grilled meat odor. It is explanatory drawing about the odor evaluation of the yakiniku odor by a 20 l chamber. 2 is a photograph at the end of the antifungal performance evaluation test in Example 1. 6 is a photograph at the end of the antifungal performance evaluation test in Comparative Example 1.

Claims (1)

0.001 to 5% by weight of a metal salt of a metal selected from silver, copper, and zinc, or 0.005 to 3% by weight of one or more organic compounds selected from halogenated aromatics and halogenated alkaloids And a deodorant building material mainly composed of tobermorite having an effective specific surface area of 15 to 50 m ² / g measured by a nitrogen gas adsorption method.

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