JP2011012051A - Fumigation agent composition, fumigation equipment and fumigation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fumigation agent composition, fumigation equipment and a fumigation method, little in remaining odor after fumigation and excellent in microorganism suppressing effect and deodorant effect.SOLUTION: The fumigation agent composition comprises an agent containing silver and an organic foaming agent. The former agent preferably has a 0.01-1,000 μm volume-average particle diameter, the organic foaming agent is preferably azodicarbonamide, and more preferably contains as an foaming auxiliary one or more selected from the group consisting of zinc oxide, zinc carbonate, zinc stearate, magnesium stearate, magnesium oxide, calcium carbonate and calcium phosphate. The fumigation equipment 10 comprises a fumigation agent part 32 filled with the fumigation agent composition, a heating part 20, and a heat transfer part transferring heat generated in the heating part to the fumigation agent part. The fumigation method comprises indirectly heating the fumigation composition.

Description

  The present invention relates to a smoke composition, a smoke device, and a smoke method.

 In recent years, in general households, microorganisms such as bacteria and molds are easily propagated in living spaces as the airtightness of houses is improved. The propagation of microorganisms not only detracts from aesthetics but also becomes a major hygiene problem such as risk of infectious diseases. In particular, a humid bathroom is an environment in which microorganisms such as bacteria and molds can easily propagate. High parts such as the ceiling of the bathroom and the upper part of the wall are difficult to maintain from the viewpoint of preventing the fungicide from being sucked in, and are therefore places where microorganisms tend to propagate. In addition, the inside of a complex structure that cannot be reached deeply such as a ventilation opening is further difficult to maintain. When microorganisms propagate in such places, they become a source of unpleasant odors. For the smell of the bathroom, removing the source is the main countermeasure, but the source is often unknown and it is difficult to cope with it.

 For such problems, a method is known in which a smoke composition containing a pest control agent and an organic foaming agent (organic volatilizer) is heated to smoke indoors (for example, Patent Document 1). ~ 3). Such care with smoke can easily prevent microbial growth and odor generation in the bathroom.

JP 2008-127299 A JP 2005-89453 A JP-A-56-77202

However, the smoke agent composition used in the bathroom can easily clean the bathroom, but a characteristic odor tends to remain after the smoke. In addition, the smoke composition is desired to have further antibacterial, antibacterial, antifungal, antifungal and other antimicrobial effects and an improved deodorizing effect.
Therefore, the present invention has an object of a smoke composition, a smoke device, and a smoke method that have little odor residue after smoke and are excellent in microbial control effect and deodorization effect.

The smoke agent composition of the present invention is characterized by containing an agent containing silver and an organic foaming agent.
The agent preferably has a volume average particle diameter of 0.01 to 1000 μm, the organic foaming agent is preferably azodicarbonamide, and zinc oxide, zinc carbonate, zinc stearate as a foaming aid, More preferably, it contains at least one selected from the group consisting of magnesium stearate, magnesium oxide, calcium carbonate, and calcium phosphate.

  The smoke device of the present invention has a smoke agent part filled with the smoke agent composition, a heating part, and a heat transfer part that transmits heat generated in the heating part to the smoke agent part. Features.

  The smoke method of the present invention is characterized by indirectly heating the smoke composition.

  According to the present invention, it is possible to reduce residual odor after smoking, and to improve the microorganism suppressing effect and the deodorizing effect.

It is sectional drawing which shows an example of the soot device of this invention. It is a schematic diagram which shows the experimental system used for evaluation of the microorganisms inhibitory effect.

(Smoke agent composition)
The smoke agent composition of the present invention (hereinafter simply referred to as smoke agent) contains a drug containing silver (hereinafter referred to as component (A)) and an organic foaming agent (hereinafter referred to as component (B)). To do.

<(A) component: a drug containing silver>
The component (A) of the present invention is a drug containing silver. By using such a component (A), the component (A) can be diffused into a room (target space) that is a smoke target without being vaporized. In addition, silver is excellent in sterilizing, antibacterial, antifungal, antifungal and other microorganism control effects and deodorizing effects.
As the component (A), a conventionally used inorganic compound containing silver can be used according to the purpose of the smoke agent. Examples of the agent include agents that act as antibacterial agents, antibacterial agents, antifungal agents, antifungal agents, deodorants, insecticides, etc., among others, antibacterial agents, antibacterial agents, antifungal agents, antifungal agents A deodorant can be preferably used.

  It is preferable that the vaporization temperature of (A) component is higher than the vaporization temperature of (B) component mentioned later. By using such (A) component, the odor derived from vaporization of (A) component can be prevented in the case of smoke treatment. Here, the vaporization does not include a decomposition reaction such as evaporation of a solvent such as water when the component (A) is a solution, or separation of oxygen when the component (A) is an oxide. The vaporization temperature (boiling point) can be measured using thermal analysis.

  As the component (A), for example, as an active ingredient, silver alone having antibacterial / sterilizing / mold / antifungal / deodorizing action, silver oxide, chloride salt, nitrate, sulfate, sulfonate, carbonate Examples thereof include inorganic silver salts such as salts, and silver compounds such as organic silver salts such as formate and acetate.

Examples of the component (A) include those obtained by supporting these active ingredients on a substance (hereinafter sometimes referred to as a carrier) such as zeolite, silica gel, low molecular glass, calcium phosphate, silicate, and titanium oxide. Examples include zeolite antibacterial agents, silica gel antibacterial agents, titanium oxide antibacterial agents, silicate antibacterial agents that carry silver compounds such as simple silver, silver oxide and silver nitrate, and silver compounds such as organic silver salts. Can be mentioned. By using such a component (A), it is possible to prevent the odor from remaining after the smoke treatment.
Among these, as the component (A), from the viewpoint of further reducing residual odor, inorganic silver salts such as single silver, silver oxide and silver nitrate, or inorganic chemicals in which these are supported on a carrier are preferable.
Moreover, (A) component can be used individually by 1 type or in combination of 2 or more types as appropriate.

The form of the component (A) is not particularly limited, but can be determined in consideration of the size of the space to be treated with smoke. The component (A) can improve the smoke conversion rate as the particles are finer and can diffuse in a wide area. On the other hand, if the particle of component (A) is too small, it will be difficult to fall after diffusing, and it will take time to develop a drug effect below the space to be treated. For example, the volume average particle diameter of the component (A) is preferably 0.01 to 1000 μm, more preferably 0.5 to 100 μm, and further preferably 1 to 5 μm. In the smoke agent composition of the present invention, even such a component (A) having a relatively large particle size can be smoked and diffused. Here, “smoke” means that component (A) can be diffused into the target space.
The volume average particle diameter is a value determined by a laser diffraction / scattering particle size distribution measuring device (LA910, manufactured by Horiba, Ltd.), and can be measured as follows. The component (A) is dispersed in distilled water so as to have a solid content of 1% by mass to obtain a sample. This sample is put into a laser diffraction / scattering type particle size distribution measuring apparatus, and the particle size distribution is measured by irradiating a laser after dispersion by ultrasonic waves in the apparatus. The diameter at which the cumulative volume frequency is 50% (volume) is defined as the average particle diameter.

 The blending amount of the component (A) in the smoke agent can be determined according to the type of the component (A), the effective component concentration, and the function required for the smoke agent. For example, the component (A) containing silver or a compound thereof as an active ingredient preferably has a silver concentration in the smoke agent of 0.0001 to 1% by mass, preferably 0.01 to 0.1% by mass. Is more preferable. This is because if it is less than the lower limit, the desired drug effect is hardly exhibited, and even if it exceeds the upper limit, the effect of the drug is saturated and further improvement of the effect cannot be expected.

<(B) component: Organic foaming agent>
(B) component which is an organic foaming agent is not specifically limited, A conventionally well-known thing can be utilized.
As the component (B), those which are pyrolyzed by heating to generate a large amount of heat and generate carbon dioxide gas, nitrogen gas or the like (hereinafter generally referred to as foaming gas) are used. For example, azodicarbonamide, p , P′-oxybis (benzenesulfonylhydrazide), N, N′-dinitrosopentamethylenetetramine, azobisisobutyronitrile and the like. Of these, azodicarbonamide is preferable from the viewpoints of decomposition temperature, amount of foaming gas, and the like.
These (B) components can be used individually by 1 type or in combination of 2 or more types. These components (B) are foamed and melted with the component (A) by heating, and the component (A) can be effectively smoked by the action of the pyrolysis gas of the component (B).

  The blending amount of the component (B) in the smoke agent can be determined in consideration of the type of the component (B), the particle size of the component (A), etc., and is preferably 50 to 80% by mass, for example, 60 -70 mass% is more preferable. If it is less than the lower limit, component (A) cannot be efficiently diffused, and if it exceeds the upper limit, many decomposition products (residues) of component (B) tend to scatter and contaminate the target space.

<(C) component: foaming aid>
(C) component which is a foaming adjuvant can be mix | blended with the smoke agent of this invention. By mix | blending (C) component, abnormal decomposition | disassembly of (B) component can be suppressed and generation | occurrence | production of substances other than foaming gas can be suppressed. In addition, the component (C) lowers the foaming temperature of the component (B), that is, foams the component (B) at a lower temperature, thereby increasing the smoke / diffusion power of the component (A) and increasing the corner of the target space. The component (A) can be diffused as much as possible. The component (C) is at least one selected from the group consisting of zinc oxide, zinc carbonate, zinc stearate, magnesium stearate, magnesium oxide, calcium carbonate, and calcium phosphate. Among them, zinc oxide and calcium carbonate are preferable, and oxidation Zinc is more preferred. Zinc oxide accelerates the decomposition of the component (B), quickly smokes the component (A), and can diffuse widely. Moreover, calcium carbonate is excellent in the effect which suppresses abnormal decomposition | disassembly of (B) component, and can suppress contamination of the floor etc. which installed the smoke agent.
0.1-20 mass% is preferable, for example, the compounding quantity of (C) component in a smoke agent is more preferable, 0.1-15 mass% is more preferable, and 0.5-5 mass% is the most preferable.
If it is less than 0.1% by mass, the effect as a foaming aid (volatilization aid) is small, and if it exceeds 20% by mass, unstable foaming may occur. Moreover, it is preferable that it is (B) / (C) = 1-700, and, as for mass ratio of (B) component and (C) component, it is more preferable that it is 10-150. By setting it as the said range, the foamability of (B) component improves, the smoke formation and spreading | diffusion of (A) component become favorable, and the microorganisms inhibitory effect can be improved more.

<Optional component>
An optional component other than the component (A), the component (B), and the component (C) can be blended with the smoke agent so long as the effects of the present invention are not impaired. As an arbitrary component, additives, such as a stabilizer, a binder, an excipient | filler, a fragrance | flavor, a pigment | dye, are mentioned, for example. Among these, it is particularly preferable to contain one or more of stabilizers, binders and excipients.

Examples of the stabilizer include sorbitan fatty acid ester, dibutylhydroxytoluene, butylhydroxyanisole, propyl gallate, epoxy compounds (epoxidized soybean oil, epoxidized linseed oil, etc.) and the like.
Examples of the binder include methyl cellulose, ethyl cellulose, carboxymethyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl cellulose, starch, dextrin, hydroxypropyl starch, gelatin, polyvinyl alcohol, polyvinyl acetate, polyvinyl pyrrolidone, sodium polyacrylate, and the like.
Examples of the excipient include clay (hydrous aluminum silicate), talc, diatomaceous earth, kaolin, bentonite, and white carbon.

<Manufacturing method>
The smoke agent of the present invention is prepared as a solid preparation such as powder, granules and tablets. The solid preparation can be prepared using a known production method according to the intended dosage form. For example, in the case of a granular preparation, it can be produced by a known granulated production method such as extrusion granulation method, compression granulation method, stirring granulation method, tumbling granulation method, fluidized bed granulation method and the like.
As a specific example of the production method by the extrusion granulation method, each component of the smoke agent is mixed by a kneader and the like, and an appropriate amount of water is added and mixed, and the resulting mixture is a die having an opening of a certain area. And granulate using a pre-extrusion or horizontal extrusion granulator. The granulated product may be further cut into a certain size using a cutter or the like and dried.

<How to smoke>
The smoke method of the present invention indirectly heats the smoke agent of the present invention. Indirectly is a method of supplying the temperature (thermal energy) obtained by pyrolyzing the component (B) via a container, a heat transfer surface or the like without burning the smoke smoke agent. For example, smoke can be smoked by storing a smoke agent in a container such as an arbitrary metal container or ceramic container and heating the container. By indirectly heating the soot agent, indoor pollution due to the burning residue of the soot agent can be reduced. Further, the target space may be smoked by being incorporated in a smoke device described later. The target space is not particularly limited, and examples include a bathroom, a living room, and a closet.
The heating method is not particularly limited, and a conventionally known indirect heating method can be used. For example, a method in which a substance that generates heat in contact with water is brought into contact with water and the reaction heat is used, mixing of iron powder and an oxidizing agent (ammonium chlorate, etc.), metal oxidation with less ionization tendency than the metal And a method of using an oxidation reaction by mixing a product or an oxidizing agent. Examples of substances that generate heat upon contact with water include calcium oxide, magnesium chloride, aluminum chloride, calcium chloride, and iron chloride. Among these, from the viewpoint of practicality, a method of bringing a substance that generates heat upon contact with water into contact with water and utilizing the reaction heat thereof is preferred, and a method of utilizing the reaction heat between calcium oxide and water is more preferred.

The amount of the fumigant of the present invention may be appropriately set according to the volume of the object space, usually, 1 m ³ per, 0.1～2.4G and more preferably 0.4g~2.0g .
The soot treatment time (time for sealing the target space after the start of soot) is not particularly limited, but is preferably 1 hour or longer, and more preferably 1.5 hours or longer.

(Smoke device)
The smoke device of the present invention transmits the smoke agent part filled with the smoke agent described above, a heating part for heating the smoke agent part, and heat generated in the heating part to the smoke agent part. And a heat transfer section.

  The smoke device will be described with an example. FIG. 1 is a cross-sectional view of a smoke device 10 of the present invention. The smoke device 10 is roughly configured by a housing 12, a heating unit 20 provided in the housing 12, and a smoke agent unit 32 provided in the housing 12. The housing 12 includes a substantially cylindrical main body 14, a bottom portion 16, and a lid portion 18. A smoke agent container 30 is provided in the housing 12, and the smoke agent container 30 is filled with a smoke agent and a smoke agent part 32 is formed.

The lid portion 18 has a hole, and examples thereof include a mesh, punching metal, and a lattice frame. Examples of the material of the lid portion 18 include metals and ceramics.
The material of the main body 14 is the same as that of the lid 18.

  The smoke agent container 30 functions as a container that fills the smoke agent part 32 and also functions as a heat transfer part that transmits the thermal energy generated in the heating part 20 to the smoke agent part 32. Examples of the smoke agent container 30 include a metal container.

  The heating unit 20 is not particularly limited, and can be determined in consideration of the amount of heat necessary for the smoke of the smoke agent unit 32. For example, a substance that generates heat upon contact with water (for example, calcium oxide) is used. It may be filled, iron powder and an oxidant may be partitioned and filled with a partition material, or a metal and a metal oxide or oxidizer having a lower ionization tendency than the metal may be filled with a partition material. You may partition and fill. Among them, it is preferable to fill with a substance that generates heat upon contact with water, and it is preferable to fill with calcium oxide.

 The bottom part 16 can be determined according to the mechanism of the heating part 20, for example, when the heating part 20 is made of a substance (calcium oxide or the like) that generates heat when in contact with water, the bottom part 16 has a nonwoven fabric or A metal mesh or the like can be used. By making the bottom part 16 into a nonwoven fabric or a mesh, water can penetrate into the heating part 20 from the bottom part 16 and can be heated.

  A smoke method using the smoke device 10 will be described. First, the smoke device 10 is installed in the target space. Next, the heating unit 20 generates heat according to the mechanism of the heating unit 20. For example, when the heating part 20 filled with calcium oxide is provided, the bottom part 16 is immersed in water. When the heating unit 20 generates heat, the smoke agent part 32 is heated via the smoke agent container 30. The smoke smoke agent of the heated smoke agent portion 32 generates gas by decomposition of the component (B), and the component (A) is smoked together with the generated gas and diffuses through the hole of the lid portion 18. Thus, the component (A) is diffused in the target space, so that a microorganism suppressing effect and a deodorizing effect can be obtained.

As described above, since the component (A) has an excellent antimicrobial effect such as antibacterial, sterilizing, antifungal, antifungal, and deodorizing, it reduces the microorganisms that are the source of odor generation in the target space. Proliferation can be prevented. When the component (A) comes into contact with microorganisms such as mold, it exerts a microorganism suppressing effect in a short time. On the other hand, organic chemicals such as 3-iodo-2-propynyl butyl carbamate (IPBC) and 2-isopropyl-5-methylphenol (IPMP) are applied to a part to be treated such as sterilization (for example, ceiling) for a long time. It shows bactericidal action by staying. Thus, the smoke agent of the present invention has a high microbial control effect and deodorant effect compared to conventional smoke agents, even in places where the humidity is high and the drug is difficult to stay for a long time, such as in a bathroom. Can be demonstrated.
In addition, by using the component (A) that does not vaporize at a general vaporization temperature (200 to 300 ° C.) of the component (B) as an active component, the component (A) can be diffused into the target space without vaporizing. Component (A) has a low odor originally. In addition, since the component (A) itself is difficult to be thermally decomposed, it does not produce a highly irritating by-product or a by-product that generates a bad odor. For this reason, generation | occurrence | production of the odor by the vaporization of the active ingredient at the time of soot processing can be suppressed like the organic substance used as an active ingredient of the conventional smoke agent.
Furthermore, by combining the component (B) with the component (B), the component (B) can be stably vaporized at a lower temperature, and the component (A) is easily smoked to every corner of the target space. Become.
(A) By making an inorganic chemical | medical agent which carry | supported the component (A) inorganic silver salt and inorganic silver salt on the support | carrier, an active ingredient is not decomposed | disassembled but can maintain the efficacy over a long term even after contacting with bacteria and mold. .

 The soot device of the present invention indirectly heats the soot agent, and does not generate a flame that burns the soot agent itself like a sliding plate soot agent. Moreover, flammable gas etc. are not used like aerosol. Therefore, it is easy to handle even in an environment where a bath using gas is installed.

Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.
(Raw material)
<(A) component: a drug containing silver>
A-1: Silver-supported silica / alumina inorganic antibacterial agent (trade name: ATOMY BALL- (UA), volume average particle diameter 15 nm, silver content 0.07% by mass, manufactured by JGC Catalysts & Chemicals Co., Ltd.)
A-2: Silver-supported silicate-based inorganic antibacterial agent (trade name: AIS-NAZ320, volume average particle diameter 2 μm, silver content 1.2% by mass, manufactured by JGC Catalysts & Chemicals Co., Ltd.)
A-3: Silver-supported zeolite inorganic antibacterial agent (trade name: Ceramedic CW, volume average particle diameter 2 μm, true specific gravity 2 g / cm ³ (20 ° C.), bulk specific gravity 0.4 g / cm ³ (20 ° C.), silver 0.6% by mass, made by Sinanen Zeomic Co., Ltd.)
A-4: Silver oxide (special grade, volume average particle size 0.1 μm, manufactured by Wako Pure Chemical Industries, Ltd.)
A-5: Silver-supported zeolite inorganic antibacterial agent (trade name: Zeomic AJ10N, volume average particle diameter 2.5 μm, true specific gravity 2 g / cm ³ (20 ° C.), bulk specific gravity 0.4 g / cm ³ (20 ° C.), (Silver content 2.5% by mass, manufactured by Sinanen Zeomic Co., Ltd.)

<(A ′) component: Comparative product of component (A)>
A′-1: 3-iodo-2-propynylbutyl carbamate (IPBC) (trade name: Glycacil 2000, manufactured by Lonza Japan Ltd.)
A′-2: 2-isopropyl-5-methylphenol (IPMP) (reagent deer special grade, manufactured by Kanto Chemical Co., Inc.)

<(B) component: Organic foaming agent>
B-1: Azodicarbonamide (ADCA) (trade name: Daiburo AC.2040 (C), manufactured by Dainichi Seika Kogyo Co., Ltd.)

<(C) component: foaming aid>
C-1: Zinc oxide (Japanese Pharmacopoeia Zinc oxide, average particle size 0.6 μm, true specific gravity 5.6 g / cm ³ (20 ° C.), manufactured by Sakai Chemical Industry Co., Ltd.)
C-2: Calcium carbonate (reagent deer first grade, manufactured by Kanto Chemical Co., Inc.)
C-3: Tricalcium phosphate (food additive, manufactured by Kanto Chemical Co., Inc.)

<Other ingredients>
Binder: Hydroxypropyl methylcellulose (HPMC) (trade name: Metroles 60SH-50, manufactured by Shin-Etsu Chemical Co., Ltd.)
Excipient: Clay (trade name: NK-300, Showa KDE Co., Ltd.)

(Evaluation methods)
<Evaluation of microbial control effect>
≪Anti-mold evaluation≫
[Exposure test]
An exposure test was conducted using the experimental system 100 shown in FIG. As shown in FIG. 2, an evaluation chamber 102 having the same volume as a 1818 mm type (for meter module) bathroom and capable of being sealed was prepared as a target space. A heating device 110 is installed at a substantially central portion of the floor 104 of the evaluation chamber 102. The heating device 110 was produced by laying an aluminum foil on a hot plate. On the ceiling 106 of the evaluation chamber 102, mold-containing flat media 120 and 130 were installed, and on the floor 104 of the evaluation chamber 102, a mold-containing flat media 140 was installed. The mold-containing plate medium 120 is located almost immediately above the heating device 110, and the mold-containing plate medium 130 is located at the corner of the ceiling 106.

 The smoke agent of each example was placed on the aluminum foil of the heating device 110 and heated with a hot plate set at 350 ° C. Heating on the hot plate was stopped 10 minutes after the start of smoking from the smoke smoke agent. In the soot test 1, after 90 minutes from the start of smoke generation, and in the soot test 2, after 30 minutes, the air in the evaluation chamber 102 was exhausted and the exposure test was completed.

[Preparation of mold plate with mold]
Cladospodium cladosporoides HMC1064 (bathroom isolate, hereinafter referred to as mold for evaluation) was prepared by culturing at 25 ° C. for 1 week on a potato dextrose agar (Difco) slant medium. Separately, potato dextrose agar (Difco) was filled into a petri dish to prepare an initial plate medium. One point of mold for evaluation was inoculated into the center of the initial plate medium using a nichrome wire in the shape of a cage and cultured at 25 ° C. for 3 days. In this way, mold plate culture mediums 120 (for effect 1), 130 (for effect 2), and 140 (for effect 3) in which mold colonies were formed on the plate medium by culture were prepared. The diameter of the mold colony before the exposure test for each of the mold plates 120, 130, and 140 was set as the initial diameter.

[Measurement of effect of exposure test]
Mold plate media 120, 130, 140 after the exposure test were collected, and the collected mold plate media 120 (effect 1: just above the smoke agent), 130 (effect 2: corner of the ceiling), 140 (effect 3) : Floor) was cultured at 25 ° C. for 5 days, and the antifungal effect was evaluated according to the following evaluation criteria.

[Evaluation criteria]
After culturing for 5 days, the diameter of the mold colony (the diameter after culturing) was measured, and the difference in diameter was determined by the following formula (1).
The obtained difference in diameter was classified according to the following criteria, and was evaluated against mold.
A: Diameter difference is 0-10mm
B: Diameter difference exceeds 10 mm, 15 mm or less C: Diameter difference exceeds 15 mm

 Diameter difference (mm) = diameter after culture (mm) −initial diameter (mm) (1)

≪Evaluation against yeast≫
[Exposure test]
Evaluation for molds except that the mold-containing plate medium 120 (effect 1: just above the smoke agent), 130 (effect 2: corner of the ceiling), and 140 (effect 3: floor) were replaced with the following plate medium with yeast. The exposure test was conducted in the same manner as above.

[Preparation of plate medium with yeast]
Rhodotorula rubra HIC3420 (bathroom isolate, hereinafter referred to as “evaluation yeast”) cultured at 25 ° C. for 2 days in a plate medium of potato dextrose agar has a starting bacterial count of 1 × 10 5 in a sterilized 0.05 mass% Tween 80 aqueous solution. ^A bacterial solution was prepared by adjusting to ^{3 to} 3 × 10 ³ CFU / mL. Separately, potato dextrose agar (Difco) was filled into a petri dish to prepare an initial plate medium. The initial plate medium was smeared with 0.1 mL of the bacterial solution to prepare a plate medium with yeast.

[Measurement of effect of exposure test]
The plate medium with yeast after the exposure test was collected, and the collected plate medium with yeast was cultured at 25 ° C. for 5 days. Separately, a plate medium with yeast not subjected to the exposure test was cultured in the same manner. After culturing, the expressed colonies were counted, and the effect on yeast was evaluated according to the following evaluation criteria.

[Evaluation criteria]
After culturing, the number of bacteria was converted to a common logarithm, and Δlog was determined by the following equation (2). The obtained Δlog was classified according to the following criteria and used as a yeast evaluation.
A: Δlog is 2 or more B: Δlog is 1 or more and less than 2 C: Δlog is less than 1

 Δlog = log (the number of bacteria after culturing of the plate medium with yeast not subjected to the exposure test) −log (the number of bacteria after the culturing of the plate medium with yeast subjected to the exposure test) (2)

<Deodorization evaluation, base odor residue evaluation>
≪Exposure test≫
A hot plate was installed in the approximate center of the floor in a bathroom (1818 mm type (for meter module) bathroom) used in a general household, and a heating device was prepared by laying aluminum foil on the hot plate. . The smoke agent of each example was placed on the aluminum foil of the heating device and heated with a hot plate set at 350 ° C. Heating on the hot plate was stopped 10 minutes after the start of smoking from the smoke smoke agent. 90 minutes after the start of smoke generation, the air in the bathroom was exhausted and the exposure test was completed. After the exposure test, three panelists confirmed the odor in the bathroom using a six-level intensity display method.

≪Deodorization evaluation≫
The deodorant evaluation was conducted by three panelists, and the bathroom odor after exposure (post-exposure odor) was targeted for the odor in the bathroom (initial odor) before the exposure test. The average score of the scoring results was classified according to the following evaluation criteria and used as deodorant evaluation.

≪Base odor residue evaluation≫
The base odor residual evaluation was scored by a six-level strength display method for the base odor (smell-derived odor) for the odor after exposure by three panelists. The average score of the scoring results of three people was classified according to the following evaluation criteria, and deodorant evaluation was performed.

≪6-level intensity display method≫
0 point: The odor is not felt 1 point: The odor is finally felt slightly (detection threshold)
2 points: Easily feel the target odor (recognition threshold that can imagine the nature of the odor)
3 points: The target odor is clearly felt. 4 points: The target odor is strongly felt. 5 points: The target odor is felt strongly.

≪Evaluation criteria≫
A: Less than 1 point B: 1 point or more, less than 2 points C: 2 points or more, less than 3 points D: 3 points or more

(Examples 1 to 29, Comparative Examples 1 to 4)
According to the composition shown in Tables 1 to 5, each component was stirred and mixed with a kneader (S5-2G type, manufactured by Moriyama Co., Ltd.), then water was added and mixed to obtain a mixture. The obtained mixture was granulated using a die pre-extruding granulator (EXK-1, manufactured by Fuji Powder Co., Ltd.) having an opening having a diameter of 2 mm to obtain a granulated product. The obtained granulated product was cut into a length of 2 to 5 mm and dried by a dryer (RT-120HL, manufactured by Alp Co., Ltd.) set at 70 ° C. to obtain a granular smoke agent. About the obtained smoke agent, microbial efficacy evaluation, deodorant evaluation, and base odor residual evaluation were performed using the usage-amount of Tables 1-5, and the result is shown to Tables 1-5.
The composition (mass%) of (A-1) to (A-3) and (A-5) in the table is described as the Ag amount. Also, in the table, the value of the difference in diameter in the column of microbial efficacy against mold, the value of Δlog in the column of evaluation against yeast, and the average score are described in parentheses for deodorant evaluation and base odor evaluation, respectively. .

As shown in the results of Examples 1 to 29 in Tables 1 to 5, the smoke agent of the present invention showed an excellent microbial inhibitory effect against mold and yeast. In addition, the smoke agent of the present invention has a high deodorizing effect in the bathroom and a small amount of residual base odor.
In Examples 19 to 29 (Tables 4 to 5) in which the (C) component is used in combination with the (A) component and the (B) component, the microbial inhibitory effect against mold is compared to Examples 1 to 18 in which the (C) component is not blended. Improved. Among them, Example 22 using zinc oxide as the component (C) showed an improvement in the microorganism suppressing effect as compared with Examples 23 and 24 in which the type of the component (C) was changed. In addition, in Examples 19 to 24, 26, 27, and 29 in which (B) component / (C) component = 10 to 140 (mass ratio), a further improvement in the microbial control effect was observed (smoke test) 1. Mold evaluation 2).

 On the other hand, Comparative Examples 1 to 3 using IPBC, which is an organic chemical instead of component (A), have a microbial control effect against mold, but have a low deodorizing effect in the bathroom and a base odor remains. It was. Moreover, the comparative example 4 which used IPMP which is an organic chemical | medical agent instead of (A) component had a low microorganisms inhibitory effect with respect to mold and yeast. In addition, Comparative Example 4 had a low bathroom deodorizing effect and a base odor remained.

 In comparison between Examples 6 and 8 and Comparative Example 3 in which the same amount of component (A ′) as that of component (A) of these examples was compared, the smoke compound of the present invention had the same compounding amount. If there was, the higher microorganism suppression effect and deodorizing effect were exhibited.

 From the above results, it was found that by using the component (A), the effect of suppressing microorganisms and the effect of deodorizing can be improved, and the residual base odor can be suppressed.

Smoke device 10
Heating unit 20
Smoke container 30
Smoke agent part 32

Claims (6)

  A smoke composition comprising a drug containing silver and an organic foaming agent.   The smoke agent composition according to claim 1, wherein the drug has a volume average particle diameter of 0.01 to 1000 μm.   The soot agent composition according to claim 1 or 2, wherein the organic foaming agent is azodicarbonamide.   Furthermore, it contains at least one selected from the group consisting of zinc oxide, zinc carbonate, zinc stearate, magnesium stearate, magnesium oxide, calcium carbonate and calcium phosphate as a foaming aid. 4. The smoke agent composition according to any one of 3 above.   A smoke agent part filled with the smoke agent composition according to any one of claims 1 to 4, a heating part, and a heat transfer part that transmits heat generated in the heating part to the smoke agent part. A smoke device characterized by comprising:   A smoke method, wherein the smoke agent composition according to any one of claims 1 to 4 is indirectly heated.

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