CN113993382B - Continuous mosquito coil - Google Patents
Continuous mosquito coil Download PDFInfo
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- CN113993382B CN113993382B CN202080043712.5A CN202080043712A CN113993382B CN 113993382 B CN113993382 B CN 113993382B CN 202080043712 A CN202080043712 A CN 202080043712A CN 113993382 B CN113993382 B CN 113993382B
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- insecticidal
- mosquito coil
- insecticidal component
- combustion
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- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012976 tarts Nutrition 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- UJMBCXLDXJUMFB-UHFFFAOYSA-K trisodium;5-oxo-1-(4-sulfonatophenyl)-4-[(4-sulfonatophenyl)diazenyl]-4h-pyrazole-3-carboxylate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)C1=NN(C=2C=CC(=CC=2)S([O-])(=O)=O)C(=O)C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 UJMBCXLDXJUMFB-UHFFFAOYSA-K 0.000 description 1
- MWOOGOJBHIARFG-UHFFFAOYSA-N vanillin Chemical compound COC1=CC(C=O)=CC=C1O MWOOGOJBHIARFG-UHFFFAOYSA-N 0.000 description 1
- FGQOOHJZONJGDT-UHFFFAOYSA-N vanillin Natural products COC1=CC(O)=CC(C=O)=C1 FGQOOHJZONJGDT-UHFFFAOYSA-N 0.000 description 1
- 235000012141 vanillin Nutrition 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- UZFLPKAIBPNNCA-FPLPWBNLSA-N α-ionone Chemical compound CC(=O)\C=C/C1C(C)=CCCC1(C)C UZFLPKAIBPNNCA-FPLPWBNLSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N53/00—Biocides, pest repellants or attractants, or plant growth regulators containing cyclopropane carboxylic acids or derivatives thereof
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M1/00—Stationary means for catching or killing insects
- A01M1/20—Poisoning, narcotising, or burning insects
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/20—Combustible or heat-generating compositions
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/34—Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
- A01P17/00—Pest repellants
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
- A01P7/00—Arthropodicides
- A01P7/04—Insecticides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Environmental Sciences (AREA)
- Zoology (AREA)
- Engineering & Computer Science (AREA)
- Plant Pathology (AREA)
- Dentistry (AREA)
- Toxicology (AREA)
- Agronomy & Crop Science (AREA)
- Insects & Arthropods (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Catching Or Destruction (AREA)
Abstract
The invention provides a durable mosquito coil which can reduce the stimulus during combustion and can continuously kill insects for a long time even if the combustion is performed for a short time. The present invention is a sustained mosquito coil having a sustained insecticidal effect even after burning, comprising: at least one insecticidal ingredient selected from the group consisting of bifenthrin, profluthrin and transfluthrin; and a carbide substrate having an iodine adsorption capacity of 200mg/g or less, wherein the amount of the insecticidal component volatilized per unit time during combustion is set to 0.05-15 mg/min, and the combustion time is set to 30 minutes or less.
Description
Technical Field
The present invention relates to a sustained mosquito coil having a sustained insecticidal effect even after combustion.
Background
As a product for repelling flying insects such as mosquitoes, a mosquito coil is widely used in which an insecticidal component is volatilized into a space to be treated by fumigation. The mosquito coil is operated in such a manner that the burning time of one mosquito coil is set to about 7 to 8 hours in accordance with the sleeping time of a person, and the insect pests present in the space to be treated are knocked down or killed until the mosquito coil burns out, and the insect pests are excluded or repelled from the space.
However, in recent years, due to the improvement of sanitary environments and the change of housing conditions, particularly in apartments and the like in urban areas, sealing of housing is continued, and the possibility of insect pests such as mosquitoes entering the building from outside the building is reduced. Therefore, when expelling mosquitoes and the like existing in a room before bedtime, it is not necessarily required to continuously volatilize insecticidal components for the bedtime as in the conventional mosquito coil. In view of this situation, attempts have been made to shorten the burning time of a mosquito coil which is considered to be essential for continuous use for a long period of time.
For example, there is a mosquito coil containing pyrethrin that volatilizes at normal temperature, such as bifenthrin, profluthrin, and tefluthrin, as an insecticidal component (see patent document 1, for example). The mosquito coil of patent document 1 has a long-term insecticidal effect even if the burning time is shortened because the insecticidal component remains in the air for a long time even after burning.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open publication No. 2011-12056
Disclosure of Invention
Problems to be solved by the invention
However, in the case of mosquito coils, products are being sought that reduce odor or irritation caused by insecticidal components, fragrance components, and smoke. However, patent document 1 has left room for study for reduction of stimulus at the time of combustion, with the main object of reducing the combustion time and volatilizing a necessary amount of insecticidal component.
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a persistent mosquito coil which reduces the irritation at the time of combustion and can continue the insecticidal effect for a long time even when the combustion is performed for a short time.
Means for solving the problems
The present invention for solving the above problems is a sustained-release mosquito coil having a sustained insecticidal effect even after combustion, comprising:
at least one insecticidal ingredient selected from the group consisting of bifenthrin, profluthrin and transfluthrin; and
a carbide substrate having an iodine adsorption capacity of 200mg/g or less.
According to the sustained-release mosquito coil of the present constitution, the carbide substrate having an iodine adsorption capacity of 200mg/g or less is contained in addition to at least one insecticidal component selected from the group consisting of bifenthrin, profluthrin and transfluthrin, and thus the insecticidal component remains in the air for a long period of time even after combustion, so that the insecticidal effect can be sustained for a long period of time. Further, the carbide substrate having an iodine adsorption capacity of 200mg/g or less can prevent the insecticidal component from being excessively decomposed to reduce the insecticidal effect and reduce odor or irritation caused by smoke or the like at the time of combustion.
In the sustaining mosquito coil of the present invention, preferably,
the amount of the insecticidal component to be volatilized per unit time during combustion is set to 0.05-15 mg/min.
According to the persistent mosquito coil of the present constitution, by setting the amount of the insecticidal component to be volatilized per unit time to the above-described range, even when the mosquito coil burns for a short period of time, a sufficient amount of the insecticidal component can be volatilized in the air.
In the sustaining mosquito coil of the present invention, preferably,
the combustion time was set to 30 minutes or less.
According to the sustained mosquito coil of the present constitution, the burning time is set to 30 minutes or less, so that the mosquito can be prevented by burning the sustained mosquito coil just before bedtime, and the sustained mosquito coil is easy to use.
In the sustaining mosquito coil of the present invention, preferably,
the duration of the insecticidal effect after combustion was set to 8 hours or more.
According to the sustained mosquito coil of the present constitution, the duration of the insecticidal effect after burning is set to 8 hours or more, so that when the mosquito coil is used at night, a human can not be bitten by mosquitoes overnight, and can sleep comfortably. Further, if the combustion time is set to 30 minutes or less and the duration of the insecticidal effect after combustion is set to 8 hours, respectively, the fire of the continuous mosquito coil is extinguished when people want to fall asleep, so that there is no fear of fire, and the mosquito coil can be used safely even at night.
In the sustaining mosquito coil of the present invention, preferably,
the blending amount of the insecticidal component is C I (mg) and the amount of the insecticidal component volatilized after complete combustion is set to V (mg), the following formula (1) is satisfied:
(V/C I )×100≥40…(1)。
according to the persistent mosquito coil of the present constitution, by satisfying the above formula (1), a sufficient amount of the insecticidal component can be volatilized in the air while suppressing the amount of the insecticidal component to be mixed.
In the sustaining mosquito coil according to the present invention, preferably,
the blending amount of the insecticidal component is C I (mg) the amount of the carbide base material to be blended is C B (g) Assuming that the iodine adsorption capacity of the carbide substrate is a (mg/g), the following formula (2) is satisfied:
C I /(C B ×A)≥3×10 -2 …(2)。
according to the sustained-release mosquito coil of the present constitution, by satisfying the above formula (2), the insecticidal component can be prevented from being excessively decomposed by the iodine adsorption ability of the carbide base material, and the insecticidal component can be volatilized in an appropriate amount that can sustain the insecticidal effect for a long period of time after combustion.
Detailed Description
Hereinafter, the persistent mosquito coil according to the present invention will be described. However, the present invention is not intended to be limited to the configurations described in the embodiments described below.
[ continuous mosquito coil)
The persistent mosquito coil of the present invention comprises an insecticidal component and a carbide base material, and is obtained, for example, by adding an appropriate amount of water to a mixed powder comprising the insecticidal component and the carbide base material, kneading the mixture, molding the mixture by an extruder, a punching machine, or the like, and then naturally drying or heat-drying the mixture. The mixed powder may be blended with a combustion improver, an extender, a binder, and the like as other base materials. The insecticidal component may be sprayed or applied with a liquid containing the insecticidal component or the like after molding, instead of being directly mixed with the mixed powder. The size of the persistent mosquito coil is preferably set to 100mm or less in total length, 7mm or less in thickness, and 5g or less in weight, more preferably set to 20mm or more and 90mm or less in total length, 2mm or more and 5mm or less in thickness, and 0.2g or more and 3g or less in weight. The shape of the persistent mosquito coil may be appropriately selected from a rod shape, a swirl shape, a cone shape, a plate shape, and the like according to the purpose of use, but is preferably a rod shape, a swirl shape, or a plate shape.
As the insecticidal component, bifenthrin, profluthrin or transfluthrin, which are pyrethroid insecticidal components having normal temperature volatility, are used. When optical isomers or geometric isomers based on asymmetric carbon or double bonds exist in the chemical constitution of these pyrethroid-based insecticidal components, any isomers may be used. These pyrethroid-based insecticidal components may be used alone or as a mixture of two or more kinds, but preferably contain bifenthrin. Here, the term "having room temperature volatility" means: vapor pressure at 30℃is 2X 10 -4 ～1×10 -2 mmHg. The bifenthrin, the profenothrin and the transfluthrin have normal-temperature volatility, so the bifenthrin still remains in the air for a long time after the continuous burning of the linear mosquito-repellent incense, and the insecticidal effect can be continuously realized for a long time. In addition, the bifenthrin, the profenothrin and the transfluthrin are partially adhered to the wall surface or the like after the volatilization and are in contact with mosquitoes having a habit of stopping on the wall surface or the like, thereby exerting a sustained insecticidal effect. In this specification, the pest repellent effect that causes pests not to approach is included in addition to the killing or knockdown effect of pests.
The content of the insecticidal component is preferably 0.1 to 5% by weight, more preferably 0.2 to 3% by weight, based on the weight of the entire persistent mosquito coil. If the content of the insecticidal component is less than 0.1% by weight, there is a possibility that a sufficient insecticidal effect is not obtained. When the content of the insecticidal component exceeds 5% by weight, there is a possibility that the insecticidal component is not a component contributing to direct combustion, and thus continuous self-extinguishing of the mosquito coil may occur.
As the carbide substrate, a carbide substrate having an iodine adsorption capacity of 200mg/g or less was used. Specifically, examples of the carbide base material include: the carbide substrate derived from plant materials such as charcoal, bamboo charcoal, activated carbon derived from plant materials, coconut shell charcoal and coffee grounds, and the carbide substrate derived from non-plant materials such as carbon black, graphite, acetylene black, activated carbon derived from coal and activated carbon derived from petroleum are particularly preferable. In the case of adding a carbide base material having an iodine adsorption capacity of 200mg/g or less to a persistent mosquito coil, the following examples will explain the details, and the odor or irritation caused by smoke or the like at the time of burning of the persistent mosquito coil can be effectively reduced or alleviated while preventing excessive decomposition of insecticidal components due to the iodine adsorption capacity of the carbide base material. If the iodine adsorption capacity of the carbide substrate exceeds 200mg/g, the insecticidal component may be excessively decomposed, and a sufficient insecticidal effect may not be obtained. In the persistent mosquito coil of the present invention, a plurality of types of carbide base materials having different iodine adsorption capacities may be mixed and used so that the iodine adsorption capacity is 200mg/g or less. The iodine adsorption capacity was measured according to the activated carbon test method defined in JIS K1474.
The content of the carbide base material is preferably 20 to 80% by weight relative to the total weight of the persistent mosquito coil. When the content of the carbide base material is less than 20% by weight, odor or irritation due to smoke or the like during combustion may not be sufficiently alleviated. If the carbide base material content exceeds 80 wt%, the formability and strength of the continuous mosquito coil may not be ensured.
The combustion improver (Japanese branch agent) is matched for stabilizing the continuous burning mosquito coil. The extender (Japanese extender) is blended to improve the formability of the persistent mosquito coil. The binder is blended as an adhesive that binds and hardens the raw materials. The combustion improver, the extender and the binder become the base material of the continuous mosquito coil. Examples of suitable combustion promoters include: wood flour, pyrethrum extraction residue powder, citrus peel powder, tea powder, coconut shell powder, etc. These combustion improvers may be used singly or as a mixture of two or more. Examples of suitable extenders include: diatomaceous earth, talc, clay, kaolin, and the like. These extenders may be used singly or as a mixture of two or more. When a suitable binder is exemplified, there may be mentioned: tab powder (Japanese: tart), starch (alpha starch, tapioca starch, etc.), methylcellulose, carboxymethylcellulose (CMC), etc. These binders may be used singly or as a mixture of two or more. The carbide base material, the combustion improver, the extender and the binder are base materials of the sustainable mosquito coil, and the content of the base materials is preferably more than 90 weight percent relative to the weight of the whole sustainable mosquito coil.
Although a fragrance suitable for a coil is usually imparted to a coil, recently, various perfume components having volatility may be added for the purpose of obtaining a fragrance effect or a relaxation effect. The persistent mosquito coil of the present invention can suppress odor or irritation caused by smoke or the like at the time of combustion and can sustain the insecticidal effect for a long period of time, regardless of the presence or absence of the fragrance component, but various fragrance components may be added to the persistent mosquito coil of the present invention for the purpose of obtaining a fragrance effect or a relaxation effect. When the perfume component is exemplified, there may be mentioned: jiale musk (galaxolide), ketjen musk, hexyl cinnamaldehyde, ambroxol, methyl dihydrojasmonate, ethylene brassylate (ethylene brassylate), geraniol, synthetic oak moss (japanese: access to the host), hexyl salicylate, tricyclodecenyl acetate (tricyclodecenyl acetate), and orange (japanese: on-demand, ambrox, tola (tolalide) (6-acetyl-1,1,2,4,4,7-hexamethyltetralin), γ -undecalactone, and kemidone (japanese: in the following, the following examples include, but are not limited to, kle, watermelon, melon, piperonal, indanyl-2, 4-dioxane, alpha-isomethyl ionone, indole, methyl cedarketone, methyl beta-naphthalenone, crystal rose, coumarin, vanillin, styrax resine, benzyl benzoate, undecanal, benzyl salicylate, ionone, alpha-ionone, beta-ionone, lilyturface, 3, 5-dinitro-2, 6-dimethyl-4-t-butyl, acetyl-pinene, 2-cyclohexylidene-2-phenyl acetaldehyde, isolongifolanone and cis-3-hexenol. These perfume ingredients may be used singly or as a mixture of two or more. The content of the fragrance component is preferably 0.001 to 5 wt%, more preferably 0.01 to 1 wt% based on the weight of the entire persistent mosquito coil. If the content of the perfume component is less than 0.001 wt%, there is a possibility that sufficient fragrance cannot be generated. When the content of the perfume component exceeds 5% by weight, there is a concern that the odor or the irritation may be excessively enhanced.
The sustained-release mosquito coil of the present invention may contain, as other components, a mildew preventive, a preservative, a stabilizer, a efficacy enhancer, a deodorant, etc. When a mildew preventive or preservative is exemplified, there may be mentioned: dehydroacetate, sorbate, p-hydroxybenzoate, and the like. When a stabilizer is exemplified, there may be mentioned: 2, 6-di-tert-butyl-4-methylphenol (BHT), 2 '-methylenebis (4-methyl-6-tert-butylphenol), 2' -methylenebis (4-ethyl-6-tert-butylphenol), 4 '-butylidenebis (3-methyl-6-tert-butylphenol), 4' -thiobis (3-methyl-6-tert-butylphenol), 2-tert-butyl-6- (3-tert-butyl-2-hydroxy-5-methylbenzyl) -4-methylphenyl acrylate, 2, 4-di-tert-butylphenyl 3, 5-di-tert-butyl-4-hydroxybenzoate, and the like. By adding such a stabilizer, not only the stability of the insecticidal component with time during storage but also the stability during fumigation can be enhanced, and further the efficacy persistence of the active component after volatilization can be improved. The amount of the stabilizer to be added is preferably 0.01 to 0.5 times the amount of the insecticidal component. If efficacy enhancers are exemplified, there may be listed: piperonyl butoxide (piperonyl butoxide), N- (2-ethylhexyl) -bicyclo [2, 1] hept-5-ene-2, 3-dicarboxyimide, and the like. Further, the persistent mosquito coil may contain coloring agents such as malachite green (malachite green), food additives (food blue No. 1, food yellow No. 4, food red No. 106, etc.).
[ Combustion time ]
Conventional mosquito coils are designed to control mosquitoes by volatilizing insecticidal components by fumigation during combustion, but smoke may be avoided during use such as sleeping. The durable mosquito coil of the present invention has a durable insecticidal effect by remaining in the air even after combustion, and thus the use-friendliness can be improved by setting the combustion time to an appropriate range. The burning time from ignition to burnout of the persistent mosquito coil of the present invention is preferably 30 minutes or less. By setting the combustion time to 30 minutes or less, mosquitoes can be prevented and removed for a long period of time during bedtime, and the combustion of the continuous mosquito coil can be completed in a short period of time before or immediately after bedtime, so that there is no fear of sleeping due to smoke or the like. The duration of the insecticidal effect (the time for which mosquitoes can be controlled) after the burning of the persistent mosquito coil is preferably 8 hours or more, more preferably 10 hours or more, and most preferably 12 hours or more. By setting the duration of the insecticidal effect after combustion to 8 hours or longer, for example, when the mosquito-repellent incense is used at night, a person can sleep comfortably without being bitten by mosquitoes overnight. Further, if the combustion time is set to 30 minutes or less and the duration of the insecticidal effect after combustion is set to 8 hours, the fire of the continuous mosquito coil is extinguished when people want to fall asleep, so that there is no fear of fire, and the mosquito coil can be used safely even at night. Thus, the sustained mosquito coil of the present invention has a short burning time, but has a long insecticidal effect, and is therefore suitable for use in houses, particularly in spaces with high tightness. However, the sustaining mosquito coil of the present invention may of course be used outdoors.
[ amount of volatile insecticidal component per unit time ]
The persistent mosquito coil of the present invention can volatilize a sufficient amount of the insecticidal component in the air even by a short-time combustion by setting the amount of the insecticidal component volatilized per unit time during the combustion to an appropriate range. Here, the amount of the insecticidal component volatilized when the persistent mosquito coil is completely burned was calculated as follows: in an exhaust bell connected to a glass tube containing silica gel, a persistent mosquito coil was completely burned, air in the exhaust bell was sucked by a pump, thereby trapping insecticidal components volatilized by the combustion, and the trapped insecticidal components were analyzed by gas chromatography. The amount of the insecticidal component to be volatilized per unit time calculated in this way divided by the burning time is preferably 0.05 to 15 mg/min, more preferably 0.1 to 10 mg/min. When the amount of the insecticidal component to be volatilized per unit time is within the above range, an appropriate amount of the insecticidal component can be volatilized into the air even by burning for a short period of 30 minutes or less. Further, when the amount of the insecticidal component to be volatilized per unit time is in the above range, odor or irritation due to smoke or the like at the time of combustion can be reduced even if the iodine adsorption capacity of the carbide substrate is 200mg/g or less. If the amount of the insecticidal component to be volatilized per unit time is less than 0.05 mg/min, the insecticidal component may not be volatilized into the air in a sufficient amount when burned for a short period of 30 minutes or less, and the insecticidal effect may not be sustained. If the amount of the insecticidal component to be volatilized per unit time exceeds 15 mg/min, there is a concern that odor or irritation of smoke caused by smoke or the like at the time of combustion cannot be sufficiently alleviated. Further, since the insecticidal component is not a component contributing to direct combustion, there is a possibility that the extinguishing of the continuous mosquito coil occurs.
[ maintenance ratio of insecticidal component ]
In the persistent mosquito coil of the present invention, the blending amount of the insecticidal component is C I (mg) assuming that the amount of the insecticidal component after complete combustion is V (mg), the amount of the insecticidal component V to be mixed with the amount of the insecticidal component C I The ratio (i.e., the retention rate of the insecticidal component) preferably satisfies the following formula (1).
Insecticidal component maintenance ratio= (V/C) I )×100≥40…(1)
By satisfying the condition of the formula (1), the insecticidal component is not excessively decomposed during the storage and burning of the persistent mosquito coil, and therefore, the amount of the insecticidal component to be mixed at the time of production can be suppressed, and at the same time, a sufficient amount of the insecticidal component can be volatilized into the air at the time of burning. If the retention rate of the insecticidal component is less than 40%, the amount of the insecticidal component to be blended is increased during the production of the continuous mosquito coil, which is economically disadvantageous. Further, since the insecticidal component is not a component contributing to direct combustion, there is a possibility that the continuous extinguishing of the mosquito coil may occur by increasing the amount of the insecticidal component.
[ insecticidal component/adsorption Capacity ratio ]
In the online mosquito-repellent incense, the blending amount of the insecticidal component is C I (mg) the amount of the carbide base material to be blended was C B (g) When the iodine adsorption capacity of the carbide substrate is A (mg/g), the compounding amount C of the carbide substrate B The product of the iodine adsorption capacity A of the carbide substrate represents the total amount of iodine adsorption of the whole continuous mosquito coil. Here, the blending amount C with respect to the carbide substrate B The blending amount C of the insecticidal component multiplied by the iodine adsorption capacity A of the carbide substrate I The ratio of the insecticidal component/the adsorption capacity ratio affects the amount of the insecticidal component to be volatilized. In the sustaining mosquito coil of the present invention, the insecticidal component/adsorptive capacity ratio preferably satisfies the following formula (2).
Insecticidal component/adsorption Capacity ratio=c I /(C B ×A)≥3×10 -2 …(2)
By satisfying the formula (2), the proportion of the insecticidal component decomposed by the iodine adsorption ability of the carbide base material during the storage and burning of the persistent mosquito coil becomes sufficiently small with respect to the blending amount of the insecticidal component at the time of production. Therefore, even if a part of the insecticidal component is decomposed during the storage and burning of the persistent mosquito coil, an appropriate amount of the insecticidal component capable of sustaining the insecticidal effect for a long time can be volatilized after the burning. Insecticidal component/adsorption capacity ratio of less than 3 x 10 -2 In this case, the proportion of the insecticidal component decomposed by the iodine adsorption ability of the carbide substrate during the storage and burning of the persistent mosquito coil is increased relative to the blending amount of the insecticidal component at the time of production, and there is a concern that the insecticidal component volatilized at the time of burning is insufficient.
[ control of insect pests ]
The persistent mosquito coil of the present invention is not particularly limited to insect pests to be controlled, and examples thereof include: the insect-killing agent has high effectiveness to flying insects such as culex, culex trilobactidus, culex tired, culex such as culex harassment, aedes aegypti, aedes albopictus such as aedes albopictus, midge, mao E fly, flea fly, membranous wing, tabanus, gnat, midge, clothes moth, cockroaches such as German cockroaches, american cockroaches, black chest cockroaches, mites, ants, bed bugs, rodents, euonyts, weeping worms, weevils and the like, and particularly to mosquitoes such as domestic mosquitoes and aedes.
Examples
[ example 1]
Charcoal powder a (50 parts by weight) having an iodine adsorption capacity of 25mg/g as a carbide base material, bifenthrin (1.5 parts by weight) as an insecticidal component, a mixed flavor (0.8 parts by weight) containing musk, musk ketone, and the like as a flavor component, pyrethrum extraction residue powder (17 parts by weight) as a vegetable powder of a combustion improver/extender, wood powder (10.7 parts by weight) and diatomaceous earth (3 parts by weight), alpha starch (14 parts by weight) as a binder, and carboxymethyl cellulose (CMC) (3 parts by weight) were mixed with water (90 parts by weight) and thoroughly kneaded. The kneaded material was molded into a rod shape by an extruder, and then dried until the moisture content was about 7 to 10 wt%, thereby producing the persistent mosquito coil of example 1. The persistent mosquito coil of example 1 has a insecticidal component/adsorption capacity ratio of 1.2 and satisfies the condition of formula (2).
The persistent mosquito coil of example 1 was applied to a 10-collapse rice room (area 16.7m 2 Height 2.5m and volume 41.7m 3 ) In use, the insect is burned out in about 23 minutes, but various insects such as mosquitoes are not close to each other during 12 hours after burning. This is considered as follows: after the continuous mosquito coil of example 1 was burned, the insecticidal component remained in the room sufficiently for 12 hours. In addition, the sustained mosquito coil of example 1 produced a small amount of smoke during combustion, did not feel a irritating odor, and produced a light floral odor. The fragrance gives a relaxed feel and is suitable for use in bedroom.
Examples 2 to 12
Charcoal powder A having an iodine adsorption capacity of 25mg/g and wood having an iodine adsorption capacity of 838mg/g were used as carbide substratesCarbon powder B, with the formulation shown in table 1, was prepared according to example 1, and continuous mosquito coils having the characteristic constitution of the present invention (examples 2 to 12) were produced. Examples 2 to 12 have insecticidal component/adsorption force ratio of 3.1X10 -2 And 2.2 satisfying the condition of the above formula (2).
[ comparative examples 1 to 3]
Continuous mosquito coils having no characteristic constitution of the present invention (comparative examples 1 to 3) were produced in accordance with example 1 using charcoal powder A having an iodine adsorption capacity of 25mg/g and/or charcoal powder B having an iodine adsorption capacity of 838mg/g as carbide substrates in accordance with the formulation shown in Table 2. The persistent mosquito coils of comparative examples 1 to 3 were examples in which the iodine adsorption capacity of the carbide substrate was larger than the prescribed one of the present invention, and the insecticidal component/adsorption capacity ratio was 7.2X10 -3 ～2.2×10 -2 Are smaller than the conditions of the above formula (2).
[ reference example ]
A continuous mosquito coil (reference example) was produced in accordance with example 1, using no carbide substrate having iodine adsorption ability, with the formulation shown in table 2.
The following tests (1) to (4) were performed using the persistent mosquito coils of examples 1 to 12, comparative examples 1 to 3 and reference examples.
(1) Stability over time
The insecticidal component contained in the persistent linear mosquito-repellent incense after 1 month of storage at 50 ℃ was analyzed by gas chromatography, and the recovery rate of the insecticidal component was calculated from the content of the insecticidal component after 1 month of storage and the blending amount of the insecticidal component at the time of production. The stability with time was determined according to the following criteria.
A: the recovery rate of insecticidal component is above 95%
B: the recovery rate of the insecticidal component is more than 90% and less than 95%
C: the recovery rate of the insecticidal component is less than 90 percent
(2) Maintenance rate of insecticidal component
In an exhaust bell connected to a glass tube containing silica gel, the persistent mosquito coil was completely burned, air in the exhaust bell was sucked by a pump, thereby capturing the insecticidal component volatilized by the combustion, and the captured insecticidal component was analyzed by gas chromatography, thereby calculating the volatilized amount of the insecticidal component when the persistent mosquito coil was completely burned. Then, the insecticidal component retention rate was calculated from the calculated amount of volatilization and the amount of insecticidal component to be blended at the time of production, based on the above formula (1).
(3) Preference of
The sustained mosquito coils were burned in a glass cylinder having a diameter of 20cm and a height of 40cm, and 10 test persons evaluated the preference of the stimulus moderation and the flavor by using the highest point as 10 and the lowest point as 1. As a result of the test based on the preference of the functional test, the average value of the evaluation points of the 10-person-passing testers was calculated.
(4) In-situ insecticidal efficacy test
At a closing of 25m 3 In the center of the room, the continuous mosquito coil is burned. After 8 hours of self-burning, 50 female imago of culex pallidum are put in and exposed for 2 hours, and all tested mosquitoes are recovered. Meanwhile, as time passes, female imago of culex light-colored which falls upward are counted, and the time point of female imago of culex light-colored which falls upward by 25 is set as KT 50 Values (rounded off below the decimal point).
TABLE 3
The persistent mosquito coils of examples 1 to 12 containing bifenthrin, profluthrin or transfluthrin as the insecticidal component and containing the carbide base material having an iodine adsorption capacity of 200mg/g or less were confirmed: excellent in stability with time, and can maintain the insecticidal component of any oneAt a rate of 40% or more, and a short-time combustion of 30 minutes or less, KT after 12 hours from combustion 50 The value is 30 minutes or less, and an excellent insecticidal effect is continuously obtained. The persistent mosquito coils of examples 1 to 12 were considered to have the same or higher time stability and insecticidal effect after 12 hours from spontaneous combustion as those of the reference example in which the carbide base material having iodine adsorption ability was not blended, and therefore, by suppressing the iodine adsorption ability of the carbide base material to 200mg/g or less, excessive decomposition of insecticidal components by the carbide base material was not generated.
In addition, the sustained-release mosquito coils of examples 1 to 12 were not excessively saturated with the fragrance having a high tendency to drift after combustion, and were relatively easy to use in practical use having excellent tendency to drift and smell, because of the smoke smell and the large smoke amount of the sustained-release mosquito coils of the reference example. This is considered as follows: the persistent mosquito coils of examples 1 to 12 were found to have a sufficient effect of reducing odor and irritation caused by smoke and the like at the time of combustion, although the iodine adsorption capacity of the carbide substrate was 200mg/g or less.
Among the persistent mosquito coils of examples 1 to 12, the tendency of slightly decreasing the efficacy was observed for the lower amounts of the insecticidal component (examples 4 to 6, 8) to be volatilized per unit time. In example 3, in which the amount of volatilization per unit time was excessively large, 10.2 mg/min, the combustion of the continuous mosquito coil was not continued until the end. Therefore, the amount of the insecticidal component to be volatilized per unit time is preferably 0.05 to 15 mg/min, more preferably 0.1 to 10 mg/min.
In comparison between example 9 and example 1, the amounts of the insecticidal component and the carbide base material were the same, and the types of the flavor components were different, but the retention rate of the insecticidal component and the KT50 value after 12 hours from the ignition were not significantly different. In comparison with example 1, example 10 was conducted in which the amounts of the insecticidal component and the carbide substrate were the same and the amounts of the insecticidal component and the carbide substrate were different from each other at the point where the flavor component was not blended, but the retention rate of the insecticidal component and KT after 12 hours from spontaneous combustion were obtained 50 The values are not much different. This is considered as follows: type and amount of perfume componentThe decomposition of the insecticidal component due to the iodine adsorption capacity of the carbide substrate is not significantly affected.
In contrast, as in comparative examples 1 to 3, bifenthrin was contained as the insecticidal component, but when the insecticidal component contained a carbide base material having an iodine adsorption capacity exceeding 200mg/g, the stability of the insecticidal component was insufficient with time, the retention rate of the insecticidal component was less than 40%, and KT after 12 hours from ignition was obtained 50 The value also reached 120 minutes or more, and a sufficient insecticidal effect was not obtained. The reason for this is considered to be: excessive decomposition of the insecticidal component by the carbide substrate occurs due to the iodine adsorption capacity exceeding 200mg/g of the carbide substrate. In addition, the persistent linear mosquito coils of comparative examples 1 to 3 were also hardly perceived as aromatic by the fragrance component, and the deterioration of the fragrance (Japanese fragrance) was perceived.
Industrial applicability
The continuous mosquito coil of the invention can be used as household or business mosquito coils and can be used for preventing and killing pests, in particular to mosquito such as culex pallidum, culex harassis, aedes albopictus and the like.
Claims (5)
1. A sustaining mosquito coil which sustains an insecticidal effect even after burning, comprising:
at least one insecticidal ingredient selected from the group consisting of bifenthrin, profluthrin and transfluthrin; and
a carbide substrate having an iodine adsorption capacity of 200mg/g or less,
the content of the insecticidal component is 0.1 to 5 weight percent relative to the weight of the whole sustainable linear mosquito incense,
the content of the carbide base material is 20-80 wt% relative to the weight of the whole continuous mosquito coil,
the blending amount of the insecticidal component is C I The blending amount of the carbide base material is C B Assuming that the iodine adsorption capacity of the carbide substrate is A, the following formula (2) is satisfied, and the C I In mg, said C B In g, said A in mg/g,
C I /(C B ×A)≥3×10 -2 (2)。
2. the sustaining mosquito coil as set forth in claim 1, wherein the amount of the insecticidal component volatilized per unit time upon combustion is set to 0.05 mg/min to 15 mg/min.
3. The sustaining mosquito coil according to claim 1 or 2, which sets a burning time to be within 30 minutes.
4. The sustaining mosquito coil according to claim 1 or 2, which sets the duration of the insecticidal effect after combustion to 8 hours or more.
5. The sustaining mosquito coil according to claim 1 or 2, wherein the blending amount of the insecticidal component is C I When the amount of the insecticidal component volatilized after complete combustion is V, the formula (1) is satisfied, and the formula C is set as follows I And V is in units of mg each,
(V/C I )×100≥40 (1)。
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| CN1430889A (en) * | 2002-11-20 | 2003-07-23 | 庄占军 | Quick flaming mosquito-repellent incense |
| JP2008013547A (en) * | 2006-06-07 | 2008-01-24 | Earth Chem Corp Ltd | Mosquito-repellent incense and method for stabilizing chemical in mosquito-repellent incense |
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| WO2019112416A1 (en) * | 2017-12-06 | 2019-06-13 | Sumitomo Chemical Enviro-Agro Asia Pacific Sdn. Bhd. | Mosquito repellent composition |
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| JP4368904B2 (en) * | 2006-11-08 | 2009-11-18 | 大日本除蟲菊株式会社 | Incense base material |
| JP6247540B2 (en) * | 2013-01-11 | 2017-12-13 | 大日本除蟲菊株式会社 | Mosquito coil |
| JP6663174B2 (en) * | 2015-06-08 | 2020-03-11 | 大日本除蟲菊株式会社 | Pharmaceutical compositions, pest control incense sticks, and preparations for heat evaporation |
| WO2017213115A1 (en) * | 2016-06-06 | 2017-12-14 | 三和インセクティサイド株式会社 | Mosquito repellent agent and mosquito repelling method |
| JP7095983B2 (en) * | 2017-12-11 | 2022-07-05 | アース製薬株式会社 | Mosquito coil |
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| CN1430889A (en) * | 2002-11-20 | 2003-07-23 | 庄占军 | Quick flaming mosquito-repellent incense |
| JP2008013547A (en) * | 2006-06-07 | 2008-01-24 | Earth Chem Corp Ltd | Mosquito-repellent incense and method for stabilizing chemical in mosquito-repellent incense |
| JP2011012056A (en) * | 2009-06-02 | 2011-01-20 | Dainippon Jochugiku Co Ltd | Method for controlling insect pest |
| CN101946806A (en) * | 2010-01-18 | 2011-01-19 | 中山榄菊日化实业有限公司 | Combustion mosquito coil incense and preparation method thereof |
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| TW202207802A (en) | 2022-03-01 |
| CN113993382A (en) | 2022-01-28 |
| TWI808528B (en) | 2023-07-11 |
| TW202114522A (en) | 2021-04-16 |
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