CN112566498A - Selective evapotranspiration method of pest repellent ingredient - Google Patents
Selective evapotranspiration method of pest repellent ingredient Download PDFInfo
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- CN112566498A CN112566498A CN201980053324.2A CN201980053324A CN112566498A CN 112566498 A CN112566498 A CN 112566498A CN 201980053324 A CN201980053324 A CN 201980053324A CN 112566498 A CN112566498 A CN 112566498A
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- 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
- A01N31/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic oxygen or sulfur compounds
- A01N31/02—Acyclic compounds
-
- 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
- A01N31/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic oxygen or sulfur compounds
- A01N31/04—Oxygen or sulfur attached to an aliphatic side-chain of a carbocyclic ring system
-
- 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
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/02—Saturated carboxylic acids or thio analogues thereof; Derivatives thereof
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Dentistry (AREA)
- Plant Pathology (AREA)
- Engineering & Computer Science (AREA)
- Pest Control & Pesticides (AREA)
- Agronomy & Crop Science (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Toxicology (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The present invention addresses the problem of providing a method for selectively evaporating an insect repellent component contained in a plant essential oil, which method can sufficiently diffuse the insect repellent component into a space such as a room by using a heating and evaporating device provided with a wick. The present invention provides a method for selectively evaporating an insect pest repellent ingredient (B) contained in a plant essential oil, characterized by heat-evaporating a heat-evaporable composition containing the plant essential oil and the following solvent (a) by means of a liquid-suction heat-evaporating device: solvent (a): 1 or more solvents selected from a solvent (a1) consisting of only an ester compound having a boiling point of 180 ℃ or higher, and a solvent (a2) consisting of a mixture of hydrocarbon compounds having a boiling point in the range of 200 to 280 ℃.
Description
Technical Field
The invention relates to a selective evapotranspiration method of insect repellent ingredients contained in plant essential oil.
Background
Conventionally, there has been known a method of diffusing a flying pest repellent for repelling flying pests such as mosquitoes into a room by using a heat transpiration device having a wick. The heating and transpiring device can achieve stable flying pest repelling effect by transpiring the chemical through heat and adjusting proper transpiration time and amount.
On the other hand, with the improvement of safety, users have increased expectations for natural-ingredient-derived pest control agents. For example, there have been proposed pest repellents containing natural ingredients such as plant essential oils as active ingredients, such as a repellent against sanitary pests such as mosquitoes, which contains fenugreek oil as an active ingredient (patent document 1), and a repellent against mosquitoes, which contains a component derived from lemon grass (patent document 2). These natural-ingredient-derived pest repellents are often applied to a subject to be protected by spraying the active ingredient directly onto the skin, clothing, or the like of a human being, thereby obtaining a repellent effect.
Such an insect repellent derived from natural ingredients is applied to a heating and transpiring device provided with a wick, and it is difficult to obtain an excellent repellent effect in a space such as an indoor space, and there is room for contrivance for a method thereof.
Patent document
Patent document 1: japanese laid-open patent publication No. 2008-127360
Patent document 2: japanese laid-open patent publication No. 2004-210756
Disclosure of Invention
The following problems exist with respect to pest repellents derived from natural ingredients: when the method is applied to a heating/transpiring device equipped with a wick, the active ingredient is decomposed by heat before transpiration or the decomposition product causes clogging of the wick, and the active ingredient cannot be sufficiently diffused into the entire space such as the room due to problems such as poor absorption of the active ingredient into the heated portion of the wick or poor transpiration of the active ingredient, and the desired pest repellent effect cannot be exhibited.
Accordingly, an object of the present invention is to provide a method for selectively evaporating an insect repellent component contained in a plant essential oil, which can sufficiently diffuse the insect repellent component into a space such as a room using a heating and evaporating apparatus having a wick.
The present inventors have conducted extensive studies to solve the above problems, and as a result, have found that the evaporability of a pest repellent component contained in a plant essential oil can be selectively improved by heat-evaporating a heat-evaporable composition containing the plant essential oil and a specific solvent using a liquid-suction heat-evaporating device, thereby completing the present invention.
The present invention is specifically summarized as follows.
1. A method for selectively evaporating an insect repellent component (B) contained in a plant essential oil, characterized by heating and evaporating a composition for heat evaporation containing the plant essential oil and a solvent (A) described below by means of a liquid-suction type heat evaporation apparatus,
solvent (a): 1 or more solvents selected from a solvent (a1) consisting of only an ester compound having a boiling point of 180 ℃ or higher, and a solvent (a2) consisting of a mixture of hydrocarbon compounds having a boiling point in the range of 200 to 280 ℃.
2. The selective transpiration method according to claim 1, wherein the pest repellent ingredient (B) is 1 or more selected from the group consisting of citronellol, geraniol, linalool, menthol, menthone and menthyl acetate.
3. The selective transpiration method according to claim 1 or 2, wherein the plant essential oil is 1 or more selected from the group consisting of citronella oil, lavender oil, peppermint oil, eucalyptus citriodora leaf oil, and peppermint oil.
4. A liquid-suction type heat-evapotranspiration composition characterized by comprising 1 or more plant essential oils selected from citronella oil, lavender oil, peppermint oil, eucalyptus citriodora leaf oil and peppermint oil and the following solvent (A) and selectively evapotranspiring 1 or more pest repellent ingredients (B) selected from citronellol, geraniol, linalool, menthol, menthone and menthyl acetate,
solvent (a): 1 or more solvents selected from a solvent (a1) consisting of only an ester compound having a boiling point of 180 ℃ or higher, and a solvent (a2) consisting of a mixture of hydrocarbon compounds having a boiling point in the range of 200 to 280 ℃.
The method for selectively evaporating pest repellent ingredients of the present invention can suppress the poor evaporation or thermal decomposition of pest repellent ingredients contained in plant essential oils and the decrease in the amount of evaporation due to poor imbibition by heat-evaporating a composition for heat-evaporation containing the plant essential oils and a specific solvent with a liquid-suction heat-evaporation apparatus, thereby selectively improving the evaporation properties. Thus, the pest repellent component contained in the plant essential oil can be sufficiently diffused into the entire space such as the room, and an excellent pest repellent effect can be obtained.
Drawings
Fig. 1 is a perspective view showing the structure of an olfactometer used in the examples.
Description of the symbols
1A sample box
1B No-treatment sample box
2A, 2B attractant part
3 mosquito receiver
4 check-valve (funnel shape)
10 olfactometer
Detailed Description
Hereinafter, the method for selective transpiration of the pest repellent ingredient of the present invention will be described in detail.
< As to the solvent (A) >)
The method for selective evaporation of an insect repellent ingredient of the present invention is characterized in that a composition for heat evaporation containing a solvent (A) is heat-evaporated by a liquid-suction heat evaporation apparatus.
The solvent (A) of the present invention is at least 1 solvent selected from the group consisting of a solvent (a1) consisting only of an ester compound having a boiling point in the range of 180 ℃ or higher, and a solvent (a2) consisting of a mixture of hydrocarbon compounds having a boiling point in the range of 200 to 280 ℃. In addition, the solvent (a) of the present invention is preferably composed of only a solvent selected from the group consisting of the solvent (a1) and the solvent (a 2).
The solvent (a1) of the present invention is a solvent composed only of an ester compound having a boiling point of 180 ℃ or higher. The boiling point in the present specification means a value measured under atmospheric pressure.
The ester compound is preferably an ester compound having 12 to 30 carbon atoms. Examples of the ester compound having 12 to 30 carbon atoms include alkyl carboxylates having 12 to 30 carbon atoms, specifically, alkyl carboxylates having 12 to 30 carbon atoms such as isopropyl myristate, hexyl orthosilicate, isopropyl palmitate, dialkyl dicarboxylates having 12 to 30 carbon atoms such as diisopropyl adipate, dioctyl adipate, diisononyl adipate, diisodecyl adipate, trialkyl citrates having 12 to 30 carbon atoms such as triethyl acetylcitrate, tributyl acetylcitrate, triethyl citrate, etc., trialkyl citrates having 12 to 30 carbon atoms such as triethyl citrate, etc., dialkyl phthalates having 12 to 30 carbon atoms such as dibutyl phthalate, diisononyl phthalate, etc. The ester compound may more preferably include alkyl carboxylate having 12 to 30 carbon atoms, dialkyl dicarboxylate having 12 to 30 carbon atoms, and acetyl trialkyl citrate having 12 to 30 carbon atoms, further preferably include alkyl carboxylate having 12 to 30 carbon atoms, and dialkyl dicarboxylate having 12 to 30 carbon atoms, and particularly preferably include dialkyl dicarboxylate having 12 to 30 carbon atoms. Among the specific examples of the ester compounds mentioned above, suitable compounds include dibutyl phthalate, isopropyl myristate, diisopropyl adipate, dibutyl adipate, bis (2-ethylhexyl) adipate, diisononyl adipate, diisodecyl adipate, triethyl acetylcitrate, tributyl acetylcitrate and triethyl citrate, and more suitable compounds include isopropyl myristate (boiling point: 193 ℃ C./2.7 kPa), diisopropyl adipate (boiling point: 293 ℃ C.), dibutyl adipate (boiling point: 305 ℃ C.), bis (2-ethylhexyl) adipate (boiling point: 335 ℃ C.), diisononyl adipate (boiling point: 227 ℃ C./0.67 kPa), diisodecyl adipate (boiling point: 244 ℃ C./0.67 kPa), triethyl acetylcitrate (boiling point: 132 ℃ C./0.13 kPa), Acetyl tributyl citrate (boiling point: 200 ℃/0.53 kPa).
The lower limit of the boiling point of the solvent (a1) is preferably 200 ℃ or higher, more preferably 250 ℃ or higher, still more preferably 270 ℃ or higher, and particularly preferably 290 ℃ or higher. The upper limit of the boiling point is preferably 500 ℃ or less, more preferably 450 ℃ or less, and still more preferably 400 ℃ or less.
As the solvent (a1) in the present invention, adipic acid diester is preferable, and dibutyl adipate is more preferable.
The solvent (a2) is at least 1 solvent selected from the group consisting of solvents (a2) comprising a mixture of hydrocarbon compounds having a boiling point in the range of 200 to 280 ℃. The solvent may be a mixture of hydrocarbon compounds having a boiling point in the range of 200 to 300 ℃, and among them, a mixture of cycloalkane hydrocarbon compounds is preferable. Here, the cycloalkane (naphine) type hydrocarbon is a saturated hydrocarbon having a cyclic structure in the molecule, and is also called cycloalkane (Cycloparaffin) type hydrocarbon, and means the same molecular formula "C" as that of the olefinic hydrocarbonnH2n"or" a compound group. It is known that naphthenic hydrocarbon compounds have inherent boiling points or viscosities according to their molecular weights or structural formulas, and generally, commercially available and widely used naphthenic hydrocarbons are mixtures of naphthenic hydrocarbon compounds, have boiling points of about 160 ℃ or more, and are identified according to their boiling point ranges. The boiling point is a value measured in accordance with "petroleum product-distillation test method-atmospheric distillation test method" prescribed in japanese industrial standard JIS K2254, or "standard test method for distillation of petroleum products and liquid fuels under atmospheric pressure" prescribed in american material test standard ASTM D86. The solvent (a2) in the present invention is preferably a mixture of such naphthenic hydrocarbon compounds, and specifically, EXXSOL D80 and EXXSOL D110 from Exxon Mobil are exemplified.
(related to plant essential oil)
The method for selectively evaporating pest repellent ingredients is characterized in that a composition for heat evaporation containing plant essential oil is heat-evaporated by a liquid-suction type heat evaporation device.
The plant essential oil of the present invention can be used without limitation as long as it has an insect repellent ingredient. Examples of the pest repellent ingredient (B) of the present invention include citronellol, geraniol, linalool, menthol, menthone, menthyl acetate, 1, 8-cineole, terpineol, dihydromyrcenol, borneol, nerol, ethyl linalool, thymol, eugenol, benzyl benzoate, cinnamyl formate, geranyl formate, limonene, carvone, pulegone, camphor, damascenone, citral, neral, perillaldehyde, phenethyl alcohol, diphenyl ether, and the like. Examples of the plant essential oils containing these insect-repellent ingredients include citronella oil, lavender oil, peppermint oil, jasmine oil, orange flower oil, bergamot oil, orange oil, geranium oil, bergamot oil, lemon oil, lemongrass oil, cinnamon oil, eucalyptus oil, lemon eucalyptus oil, thyme oil, peppermint oil, and the like. Among them, as the plant essential oil of the present invention, citronella oil, lavender oil, peppermint oil, eucalyptus citriodora leaf oil, and peppermint oil are preferable.
In 1 example of the present invention, when 1 or more kinds selected from citronella oil, lavender oil, peppermint oil, eucalyptus citriodora leaf oil and peppermint oil are used as the plant essential oil, the effect of selectively evaporating at least 1 or more kinds of the pest repellent ingredient (B) selected from citronellol, geraniol, linalool, menthol, menthone and menthyl acetate is exhibited.
The citronella oil is an essential oil extracted from the leaves of citronella grass, a wild grass of Gramineae. The lemongrass is a kindred plant of the lemongrass and is fresh citrus with similar fragrance. Citronella oil contains various components in addition to citronellal, geraniol, citronellol, and the like. The "citronella oil" in the present invention includes not only the citronella oil extracted from the leaves of citronella grass described above, but also, for example, a composition containing synthesized citronellal, geraniol, and citronellol as main components and, if necessary, other components. Among them, natural citronella oil is preferable.
The lavender oil is an essential oil extracted from flowers of lavender. The lavender variety as a raw material of the lavender oil is not particularly limited, and examples thereof include true lavender, lavandula angustifolia, and lavandula vulgaris. The lavender oil contains various components in addition to linalyl acetate, linalool, and the like. The type of the raw material of the lavender oil used in the method of the present invention is not particularly limited, and 2 or more different types of lavender oils may be used in combination. Further, the "lavender oil" in the present invention includes not only the above-mentioned general lavender oil obtained from the flowers of lavender, but also a composition containing, for example, synthetic linalyl acetate or linalool as a main component and other components as necessary. Among them, natural lavender oil obtained from lavender flowers is preferable.
Peppermint oil or peppermint oil is an ingredient extracted from a plant of the genus Mentha. Such peppermint oil or peppermint oil has a different composition depending on the plant species used as the raw material, and includes, for example, those containing menthol as the main component and those containing carvone as the main component. Examples of plants of the genus Mentha include peppermint such as peppermint and Japanese mint, spearmint such as peppermint, and apple mint such as savory. Peppermint oil derived from peppermint oil or Japanese mint contains menthol as main ingredient, peppermint oil contains other ingredients such as menthol, menthone, menthyl acetate, etc., and peppermint oil contains other ingredients such as menthone, eucalyptol, menthyl esters, etc. On the other hand, peppermint oil derived from spearmint contains carvone as a main component and other components such as limonene and cineole. The plant species used as the raw material of the peppermint oil used in the present invention is not particularly limited, and 2 or more different plant species of peppermint oil may be used in combination. Further, the "peppermint oil" in the present invention includes not only the above-mentioned general peppermint oils obtained from the genus mentha but also compositions containing, for example, synthetic menthol, menthone, and menthyl acetate as main components and, if necessary, other components. Among them, natural peppermint oil obtained from plants of the genus Mentha is preferable.
Eucalyptus citriodora oil is an ingredient extracted from Eucalyptus citriodora (Eucalyptus citriodora) and is called Eucalyptus citriodora oil because it contains a lemon-like flavor. Compared with eucalyptus oil, the eucalyptus oil contains 1, 8-cineole as main component, and the lemon eucalyptus oil contains citronellal as main component.
Plant essential oils derived from natural citronella oil, lavender oil, peppermint oil, etc. are obtained by subjecting the plant or its parts as raw materials to steam distillation or squeezing.
< composition for heat transpiration >
The heat-transpiration composition of the present invention contains a plant essential oil and a solvent (a), and the amount of the plant essential oil blended in the heat-transpiration composition is preferably in the range of 0.1 wt% to 90 wt%, more preferably in the range of 1 wt% to 50 wt%, and still more preferably in the range of 3 wt% to 20 wt%. The amount of the solvent (a) to be blended in the heat-evaporable composition is preferably in the range of 10 wt% to 95.5 wt%, more preferably in the range of 50 wt% to 95 wt%, and still more preferably in the range of 70 wt% to 90 wt%.
The composition for heat transpiration of the present invention may contain other optional components as long as the effects of the present invention are exhibited. As other optional components, for example, in addition to pest control components such as insecticides, insect repellents, and repellents other than plant essential oils, deodorizers, antifungal agents, antioxidants, ultraviolet absorbers, stabilizers, pigments, preservatives, pH adjusters, ultraviolet absorbers, perfumes, bactericides, antistatic agents, antifoaming agents, synergists, inorganic powders, surfactants, and auxiliary solvents can be used. The amount of these optional components blended in the heat-evaporable composition is preferably in the range of 0.01 wt% to 10 wt%, more preferably 0.1 wt% to 5 wt%.
Examples of the insecticide include pyrethroid insecticides such as natural pyrethrin, allethrin, tetramethrin, resmethrin, flumethrin, permethrin, phenothrin, esfenprox, prallethrin, bifenthrin, transfluthrin, metofluthrin, proffluthrin, imiprothrin, sumethrin, etofenprox, silafluofen and the like; carbamate insecticides such as propoxur and carbaryl; organophosphorus insecticides such as fenitrothion and DDVP; oxadiazole insecticides such as oxadixolone; phenylpyrazole insecticides such as fipronil; neonicotinoid insecticides such as imidacloprid and dinotefuran; sulfonamide insecticides such as Amidoflumet; pyrrole compounds such as chlorfenapyr; insect juvenile hormone compounds such as methoprene and hydroprene; anti-juvenile hormone compounds such as precocene; ecdysone compounds such as ecdysone; chitin synthesis inhibitors such as chlorfluazuron, diflubenzuron, hexaflumuron and buprofezin; isobornyl thiocyanoacetate, isobornyl thiocyanoacetate ethyl ester, quaternary ammonium salt, and benzyl hydrosylate.
Examples of the insect repellent and repellent agent include 1 or 2 or more species of diethylflufen, di-N-butyl succinate, hydroxyanisole, rotenone, ethyl butylacetamidopropionate, escaprtin (petasitin), ethyl 3- (N-butyl-N-acetyl) aminopropionate, and the like. In addition, the composition for heat transpiration of the present invention is preferably free from pest control components such as insecticides, insect repellents, and repellents other than plant essential oils.
< liquid suction type heating evapotranspiration device >
The present invention is characterized in that a composition for heat transpiration containing a plant essential oil and the following solvent (a) is heat transpired by a liquid-suction heat transpiration device.
The liquid-suction type heat-radiating apparatus of the present invention may be any type as long as it is a liquid-suction type heat-radiating apparatus using various types of conventionally known wicks. The shape, size, material, and the like of the composition for heat-evaporation of the present invention are not particularly limited as long as the composition is absorbed by the wick and heat-evaporated by an arbitrary heating method, and examples thereof include a plug type in which the device body is directly inserted into a socket by an electric heating method, and a stand type in which the device body is provided with a wire.
The liquid absorption core of the liquid absorption type heat-transpiration device is not particularly limited in material, diameter, length, shape, and the like, as long as the composition for heat-transpiration of the present invention can be slowly absorbed. Examples of the inorganic material include felt, nonwoven fabric, cotton, pulp, biscuit, and inorganic molded product, and further, a porous core of synthetic resin such as polyester, a core obtained by fixing synthetic fiber bundles with resin, and the like can be used. Further, the wick may be a hollow wick such as a capillary tube. Specific examples of the inorganic molded article include a material obtained by fixing inorganic fibers such as glass fibers and asbestos to a porous ceramic material with a binder such as gypsum or bentonite, a material obtained by fixing mineral powders such as kaolin, activated clay, talc, diatomaceous earth, clay, perlite, gypsum, bentonite, alumina, silica, aluminum silicate, titanium, vitreous volcanic calcined powder and vitreous pozzolan calcined powder alone or a material obtained by fixing a paste such as wood powder, carbon powder and activated carbon with dextrin, starch, gum arabic and carboxymethyl cellulose.
As the heating method, heating by a heating element which generates heat by energization is generally widely used, and examples thereof include a PTC heater (positive temperature coefficient thermistor), a ceramic heater, and the like, but the present invention is not limited thereto, and heating by any known heating element such as a heating material which is oxidized by air, a heating material such as a platinum catalyst, and the like may be used.
The heating temperature is determined by considering the amount of the composition for heat transpiration per unit time. In general, in the liquid suction type heating/evaporating apparatus, the surface temperature of the heater alone may be set to a range of about 70 to 200 ℃, preferably about 85 to 160 ℃, more preferably about 100 to 150 ℃, and most preferably about 110 to 140 ℃. This temperature corresponds to a temperature at which the composition for heat transpiration in the present invention is transpired at about 60 to 185 ℃, preferably about 75 to 135 ℃, more preferably about 80 to 125 ℃, and most preferably about 85 to 115 ℃.
In the liquid-suction type heat-transpiration device including the liquid-suction core as described above, the heat-transpiration composition is sucked into the liquid-suction core from the chemical liquid container containing the heat-transpiration composition, and the upper side surface portion of the liquid-suction core is heated by a heating method (for example, a heating element), whereby the pest repellent component (B) contained in the plant essential oil is selectively transpired. For example, a known liquid-suction type heat-radiating apparatus such as the one described in Japanese patent application laid-open No. 63-240738 can be used in the present invention.
[ composition for selective evapotranspiration by liquid-suction heating evapotranspiration ]
The composition for selective transpiration in a liquid-suction type heat transpiration of the present invention contains a plant essential oil selected from the group consisting of citronella oil, lavender oil, peppermint oil, eucalyptus citriodora leaf oil and peppermint oil and the solvent (a), and is used for the purpose of selectively transpiring 1 or more pest repellent ingredients (B) selected from the group consisting of citronellol, geraniol, linalool, menthol, menthone and menthyl acetate by performing heat transpiration using a liquid-suction type heat transpiration device.
Examples
The present invention will be specifically described in the following examples, but the present invention is not limited to these examples. In the examples, "part" means "part by weight" unless otherwise specified.
< test for confirming evapotranspiration of Selective insect repellent ingredient >
(1) Preparation of test samples
[ example 1-1]
A composition for heat-transpiration of example 1-1 was prepared by mixing 20 parts by weight of citronella oil and 80 parts by weight of dibutyl adipate (boiling point: 305 ℃ C.).
[ examples 1-2]
The composition for heat transpiration of example 1-2 was prepared by mixing 20 parts by weight of citronella oil with 80 parts by weight of EXXSOL D80 (boiling point: 200 to 250 ℃ C.) manufactured by Exxon Mobil.
[ examples 1 to 3]
A composition for heat transpiration of example 1-3 was prepared by mixing 20 parts by weight of citronella oil with 80 parts by weight of EXXSOL D110 (boiling point range: 237 to 277 ℃ C.) manufactured by Exxon Mobil.
[ example 2-1]
A composition for heat transpiration of example 2-1 was prepared by mixing 20 parts by weight of lavender oil and 80 parts by weight of dibutyl adipate (boiling point: 305 ℃ C.).
[ examples 2-2]
A composition for heat transpiration of example 2-2 was prepared by mixing 20 parts by weight of lavender oil and 80 parts by weight of EXXSOL D80 (boiling point: 200 to 250 ℃ C.) manufactured by Exxon Mobil.
[ examples 2 to 3]
A composition for heat transpiration of example 2-3 was prepared by mixing 20 parts by weight of lavender oil with 80 parts by weight of EXXSOL D110 (boiling point: 237 to 277 ℃ C.) manufactured by Exxon Mobil.
[ example 3-1]
A composition for heat transpiration of example 3-1 was prepared by mixing 20 parts by weight of peppermint oil and 80 parts by weight of dibutyl adipate (boiling point: 305 ℃ C.).
[ examples 3-2]
A composition for heat transpiration of example 3-2 was prepared by mixing 20 parts by weight of peppermint oil with 80 parts by weight of EXXSOL D80 (boiling point: 200 to 250 ℃ C.) manufactured by Exxon Mobil.
[ examples 3 to 3]
A composition for heat transpiration of example 3-3 was prepared by mixing 20 parts by weight of peppermint oil with 80 parts by weight of EXXSOL D110 (boiling point: 237 to 277 ℃ C.) manufactured by Exxon Mobil.
Comparative example 1
20 parts by weight of citronella oil and 80 parts by weight of EXXSOL D130 (boiling point range: 275 to 318 ℃ C.) manufactured by Exxon Mobil corporation were mixed to prepare a composition for heat transpiration of comparative example 1.
Comparative example 2
A composition for heat transpiration of comparative example 2 was prepared by mixing 20 parts by weight of lavender oil and 80 parts by weight of EXXSOL D130 (boiling point: 275 to 318 ℃ C.) manufactured by Exxon Mobil.
Comparative example 3
20 parts by weight of peppermint oil were mixed with 80 parts by weight of "EXXSOL D130" made by Exxon Mobil corporation: (boiling point range: 275 to 318 ℃) to prepare a composition for heat transpiration of comparative example 3.
In the preparation of the test sample, the content of the pest repellent ingredient contained in the plant essential oil used in the preparation was as follows based on gas chromatography analysis.
In the case of citronella oil, it contains 14% by weight of citronellol and 19% by weight of geraniol relative to the total weight.
In the case of lavender oil, it contains linalool in an amount of 25% by weight relative to the total weight.
The peppermint oil contained 39 wt% of menthol, 45 wt% of menthone, and 4 wt% of menthyl acetate, relative to the total weight.
(2) Evapotranspiration confirmation test method
To a glass tube provided with a funnel
In the apparatus, 15g of silica gel was filled through a 40-mesh sieve, and a vaporizing port of a liquid suction type heating vaporizing device was provided just below the funnel to collect the drug. The surface temperature of the heater alone in the liquid suction type heat evaporator was set to 115 ℃ to set the evaporation temperature of the heat evaporator composition to about 90 ℃. The pump for sucking air from the evaporation port to the silica gel side was operated to heat the composition for heat evaporation of the test sample, and the evaporated gas was trapped for 2 hours.
Quantitative analysis was performed by gas chromatography on the insect repellent components, namely citronellol, geraniol, linalool, menthol, menthone, menthyl acetate, contained in the plant essential oil in each of the heat evapotranspiration compositions adsorbed on silica gel to obtain "the evapotranspiration amount of the insect repellent components". The "amount of heat-evaporable composition" was obtained from the difference in weight of the heat-evaporable composition before and after capturing of the evaporable gas. Using these measured values, the evapotranspiration rate of each pest repellent ingredient was calculated by the following calculation formula.
[ evapotranspiration rate calculation formula ]
The evapotranspiration rate (%) is the evapotranspiration amount of each pest repellent component ÷ (evapotranspiration amount of the composition for heat transpiration × blending rate of each plant essential oil × content of each pest repellent component in each plant essential oil) × 100
The evapotranspiration rates of the insect pest repellent ingredients in the test samples are shown in tables 1 to 3.
[ Table 1]
[ Table 2]
[ Table 3]
From the results shown in tables 1 to 3, it was confirmed that the heat-transpiration composition of examples 1-1, 1-2, and 1-3 used in the method for selectively transpiring a pest repellent component of the present invention selectively transpired citronellol and geraniol, which are pest repellent components contained in citronella oil. Similarly, it was confirmed that the heat-transpiration compositions of examples 2-1, 2-2, and 2-3 used in the method for selective transpiration of an insect pest repellent ingredient of the present invention selectively transpired linalool, which is an insect pest repellent ingredient contained in lavender oil, and the heat-transpiration compositions of examples 3-1, 3-2, and 3-3 used in the method for selective transpiration of an insect pest repellent ingredient of the present invention selectively transpired menthol, menthone, and menthyl acetate, which are insect pest repellent ingredients contained in peppermint oil.
Specifically, the composition for heat transpiration containing the solvent (a1) (examples 1-1, 2-1, and 3-1) or the composition for heat transpiration containing the solvent (a2) (examples 1-2, 2-2, 3-2, 1-3, 2-3, and 3-3) was confirmed to have a transpiration rate of the pest repellent ingredient contained in the plant essential oil of at least 74% and a selective transpiration of at most 95%.
On the other hand, it was found that in the heat-transpiration compositions (comparative examples 1 to 3) containing a solvent other than the solvent (a) of the present invention, the transpiration rate of the pest repellent component contained in the plant essential oil was only about 23 to 58%, and selective transpiration was not achieved.
< confirmation test of pest repellent Effect >
The repellent test for mosquitoes using the compositions for heat transpiration of examples 1 to 2 and comparative example 1 was carried out using an olfactometer shown in fig. 1.
The olfactometer 10 includes 1 set of transparent sample cartridges (sample cartridge 1A, non-processed sample cartridge 1B), transparent tubular attracting parts 2A and 2B connected to each other, and a transparent mosquito storage case 3 connected to each attracting part. The connection part between the mosquito storage case 3 and the attracting parts 2A and 2B is provided with a check valve 4 (funnel shape) for preventing the mosquitoes intruding into the respective attracting parts from the mosquito storage case 3 from returning to the mosquito storage case 3 again. Clean air is generated at a flow rate of 0.3m/s (an air flow generating portion is omitted from the drawing) from the sample case 1A, 1B side toward the mosquito storage case 3 in the olfactometer 10.
The test for confirming the repellent effect of pests was carried out by the following method: as a test insect, 25 aedes albopictus (female) mosquitoes were put into the mosquito storage case 3, and as a test sample, the composition for heat transpiration of example 1-2 or comparative example 1 was transpired for 30 seconds (about 1mg) in the sample case 1A. The heat-transpiration composition was quickly removed, a hand was inserted into each of the sample cell 1A and the untreated sample cell 1B to the wrist, and the number of mosquitoes intruding into each of the attracting portions 2A and 2B after 5 minutes was measured. The pest repellent ratio (%) was calculated by the following equation. This test was repeated 3 times for each of the compositions for heat transpiration, and the results are shown in table 4 below.
[ calculation formula of pest repellent ratio ]
Repellent ratio (%) (number of mosquitoes in the attracting section 2B-number of mosquitoes in the attracting section 2A) ÷ number of mosquitoes in the attracting section 2B × 100
[ Table 4]
From the results shown in table 4, it was clarified that the heat-transpiration composition of example 1-2 used in the method for selective transpiration of a pest repellent ingredient according to the present invention selectively transpires citronellol and geraniol which are pest repellent ingredients contained in citronella oil, and as a result, extremely excellent pest repellent effect was exhibited.
On the other hand, it was confirmed that the composition for heat transpiration of comparative example 1 containing a solvent not belonging to the solvent (a) of the present invention, which contains citronella oil as in examples 1-2, could not selectively transpire citronellol and geraniol as pest repellent ingredients, and could not exhibit sufficient pest repellent effect.
< reference test: comparison test of repellent effect between heat-transpiration and wind-transpiration
(1) Preparation of reference test sample 1
Reference test sample 1 was prepared by mixing 5 parts by weight of citronella oil, 1 part by weight of p-3, 8-menthanediol, 10 parts by weight of isopropyl alcohol, 67.2 parts by weight of a hydrocarbon solvent (mixture of 14 to 16 carbon atoms, boiling point range: 245 to 285 ℃) and 16.8 parts by weight of a hydrocarbon solvent (mixture of 16 to 18 carbon atoms, boiling point range: 270 to 310 ℃).
(2) Preparation of reference test sample 2
Reference test sample 2 was prepared by mixing 1 part by weight of p-3, 8-menthanediol, 10 parts by weight of isopropyl alcohol, 71.2 parts by weight of a hydrocarbon solvent (mixture of carbon numbers 14 to 16, boiling point range: 245 to 285 ℃) and 17.8 parts by weight of a hydrocarbon solvent (mixture of carbon numbers 16 to 18, boiling point range: 270 to 310 ℃).
(3) Preparation of reference test sample 3
(4) Test method for confirming repellent effect
(i) The repellent effect was confirmed in a test area (floor area: about 50 m) provided with a ceiling, a floor and four walls2The height is as high as: about 3.5m) having a ceiling, a floor and four walls (floor area: about 10m2The height is as high as: about 2.4 m).
(ii: no treatment test) test insects (about 150 female Aedes aegypti) were placed in the test area and acclimated for 1 hour. Next, 1 subject was placed in the treatment zone, and a gap (width: about 10cm, height: 180cm) was opened in the wall of the treatment zone to communicate with the inside of the test zone, thereby starting a non-treatment test. After the start of the no-treatment test, the number of test insects invading the treated area was measured (hereinafter referred to as "invasion number p 1"), and the time until the "invasion number p 1" reached 30 or more (hereinafter referred to as "time t 1").
The time (t1) was determined by observing the reaction mixture at 2 minutes, 5 minutes, 7 minutes and 10 minutes every 5 minutes after 10 minutes.
(iii: heat transpiration test) after leaving the room and closing the window provided in the wall of the treatment area, the test insects having the above-mentioned "intrusion number p 1" were added to the test area and acclimatized for 1 hour. Next, a liquid suction type heat-evapotranspiration device (heating surface temperature: about 127 ℃ C., composition evapotranspiration temperature: about 108 ℃ C.) provided with any of the reference test samples 1 to 3 was operated for 1 hour in the treatment zone to evapotranspire any of the reference test samples 1 to 3. Then, 1 subject was placed in the treatment zone, and a slit (width: about 10cm, height: 180cm) was opened in the wall of the treatment zone to communicate with the inside of the test zone, thereby starting the heat-evapotranspiration treatment test. The number of test insects invading the treatment zone (hereinafter referred to as "invasion number p 2") was measured between the start of the heat-transpiration test and the elapse of "time t 1".
(iv: wind transpiration test) following (ii), the test subjects in the treatment area were separated from the room, the windows provided in the wall of the treatment area were closed, and then the test insects having the above-mentioned "intrusion number p 1" were added to the test area and acclimated for 1 hour. Next, an air-based evapotranspiration device (a device for blowing air to the polyolefin-made impregnated material impregnated with the reference test sample 1 at an air speed of 0.8 m/sec by a fan) was operated for 1 hour in the treatment area to transpire the reference test sample 1. The treatment zone was again equipped with 1 subject, and the treatment zone was opened with a slit (width: about 10cm, height: 180cm) in the wall of the treatment zone so as to communicate with the inside of the test zone, and the wind-evapotranspiration test was started. The number of test insects invading the treatment area (hereinafter referred to as "invasion number p 3") was measured between the start of the wind transpiration test and the elapse of "time t 1".
The heat-evapotranspiration repellent ratio (%) or the wind-evapotranspiration repellent ratio (%) was calculated according to the following equation.
The heat transpiration test based on the above-mentioned reference test samples 1, 2 and the wind transpiration test based on the above-mentioned reference test sample 1 were repeated 3 times, respectively. The average repellent ratio (%) of each is shown in table 5 below.
[ insect repellent ratio 2 calculation formula ]
Heat-evapotranspiration avoidance rate (%) (number of invasion p 1-number of invasion p2) ÷ number of invasion p1 × 100
Wind-evapotranspiration repellent ratio (%) (number of invasion p 1-number of invasion p3) ÷ number of invasion p1 × 100
[ Table 5]
As shown in table 5, it was confirmed that the repellent effect of reference test sample 1 containing citronella oil and p-3, 8-menthanediol was approximately 3 times greater than that of reference test sample 2 containing only p-3, 8-menthanediol or reference test sample 3 containing only citronella oil when the evaporation was performed using a liquid-suction heating evaporator. Further, it was confirmed that when the reference test sample 1 having the same composition was evaporated using a liquid-suction type heat evaporator and a wind-based evaporator, the repellent effect of the heat evaporator was approximately 3 times as much as that of the wind evaporator. That is, it was found that when the evaporation was carried out using a liquid-suction type heating and evaporating apparatus, a synergistic repellent effect, which is equal to or more than the additive effect, was obtained when citronella oil and p-3, 8-menthanediol were used in combination, as compared with the case where the oils were contained individually.
Based on the results, it is considered that the-3, 8-menthanediol promotes the evaporation of plant essential oils such as citronella oil in the liquid-suction type heating and evaporating device, and exerts an extremely excellent pest repellent effect. The excellent pest repellent effect is obtained by using plant essential oil such as citronella oil and p-3, 8-menthanediol together, and is a synergistic effect of the additive effect or more.
In addition, in other tests, it was confirmed by an evaluation test (professional review 9) that: when a combination of essential oils of plants such as citronella oil and p-3, 8-menthanediol is evaporated by a liquid-suction type heating and evaporating device, a higher preference flavor is obtained than when essential oils of plants such as citronella oil are evaporated alone.
A pest repellent composition for a liquid-suction type heating evapotranspiration device is characterized by containing plant essential oil and p-3, 8-menthanediol.
A pest repellent composition for a liquid suction type heating transpiration device is characterized by containing more than 1 kind of plant essential oil selected from citronella oil, lavender oil, peppermint oil, eucalyptus oil and peppermint oil and p-3, 8-menthanediol.
A pest repellent method is characterized in that a pest repellent composition containing vegetable essential oil and para-3, 8-menthanediol is heated and evaporated by a liquid suction type heating and evaporating device.
Industrial applicability
The method for selectively evaporating pest repellent ingredients of the present invention can selectively improve the evaporation property by suppressing a decrease in the amount of the pest repellent ingredients contained in the plant essential oil due to poor evaporation, thermal decomposition, and poor liquid absorption by heating and evaporating the composition for heat evaporation, which contains the plant essential oil and the specific solvent, by using a liquid-suction type heat evaporation device. Thus, the pest repellent component contained in the necessary amount of plant essential oil can be diffused into the whole space such as the room without waste by using the liquid suction type heating and evaporating device, and the extremely excellent pest repellent effect can be exhibited.
Claims (4)
1. A method for selectively evaporating an insect repellent component (B) contained in a plant essential oil, characterized by heating and evaporating a composition for heat evaporation containing the plant essential oil and a solvent (A) described below by means of a liquid-suction type heat evaporation apparatus,
solvent (a): 1 or more solvents selected from a solvent (a1) consisting of only an ester compound having a boiling point of 180 ℃ or higher, and a solvent (a2) consisting of a mixture of hydrocarbon compounds having a boiling point in the range of 200 to 280 ℃.
2. The selective transpiration method according to claim 1, wherein the pest repellent ingredient (B) is 1 or more selected from the group consisting of citronellol, geraniol, linalool, menthol, menthone and menthyl acetate.
3. The selective transpiration method according to claim 1 or 2, wherein the plant essential oil is 1 or more selected from the group consisting of citronella oil, lavender oil, peppermint oil, eucalyptus citriodora leaf oil, and peppermint oil.
4. A liquid-suction type heat-evapotranspiration composition characterized by comprising 1 or more plant essential oils selected from citronella oil, lavender oil, peppermint oil, eucalyptus citriodora leaf oil and peppermint oil and the following solvent (A) and selectively evapotranspiring 1 or more pest repellent ingredients (B) selected from citronellol, geraniol, linalool, menthol, menthone and menthyl acetate,
solvent (a): 1 or more solvents selected from a solvent (a1) consisting of only an ester compound having a boiling point of 180 ℃ or higher, and a solvent (a2) consisting of a mixture of hydrocarbon compounds having a boiling point in the range of 200 to 280 ℃.
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| WO2022223967A1 (en) * | 2021-04-20 | 2022-10-27 | Reckitt & Colman (Overseas) Hygiene Home Limited | Insect control composition |
| CN113367163A (en) * | 2021-05-28 | 2021-09-10 | 天津科技大学 | Natural insect-expelling sterilizing incense and preparation method thereof |
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| JP2002173407A (en) * | 2000-12-05 | 2002-06-21 | Fumakilla Ltd | Flying insect repellent |
| CN101124909A (en) * | 2006-08-14 | 2008-02-20 | 住友化学株式会社 | Controlling pest through heating fumigating |
| CN102578080A (en) * | 2011-01-07 | 2012-07-18 | 王天桃 | Manufacturing method of aqua electric heating mosquito repellent liquid, mosquito repellent mother liquid and electric heating mosquito repellent sheet dropping liquid |
| JP2018008947A (en) * | 2016-06-30 | 2018-01-18 | アース製薬株式会社 | Cockroach repellent application method |
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| JP2003164249A (en) | 2001-11-30 | 2003-06-10 | Matsushita Electric Ind Co Ltd | Repellent apparatus for sanitary insect pest |
| JP7368072B2 (en) | 2016-12-26 | 2023-10-24 | 株式会社イノアックコーポレーション | Mosquito repellent polyurethane foam |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002173407A (en) * | 2000-12-05 | 2002-06-21 | Fumakilla Ltd | Flying insect repellent |
| CN101124909A (en) * | 2006-08-14 | 2008-02-20 | 住友化学株式会社 | Controlling pest through heating fumigating |
| CN102578080A (en) * | 2011-01-07 | 2012-07-18 | 王天桃 | Manufacturing method of aqua electric heating mosquito repellent liquid, mosquito repellent mother liquid and electric heating mosquito repellent sheet dropping liquid |
| JP2018008947A (en) * | 2016-06-30 | 2018-01-18 | アース製薬株式会社 | Cockroach repellent application method |
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