JPH06321703A - Aerosol composition for pest control - Google Patents

Abstract

PURPOSE:To lower the use of oil solvent from the viewpoint of environmental hygiene and to enhance the safety of a flammable hydrocarbon used as a spraying agent in place of Flon gas in the aerosol composition for pest control. CONSTITUTION:This aerosol composition for pest control is obtained by compounding an active component consisting of an oil soluble insecticide and/or an acaricide in an oil solvent with at least one kind of compound selected from sorbitan sesquioleate, polyoxyethylene (2) lauryl ether, diglyceryl monooleate and hexaglycerin polyricinolate, water, oil solvent and a spraying agent as dispersing agents.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to pest control aerosol compositions. Specifically, an oil-soluble active ingredient such as an insecticide and / or an acaricide is dissolved in an oil solvent,
The present invention relates to a shaking type aqueous aerosol composition for controlling pests when used, which comprises shaking an aerosol container at the time of use to disperse water in an oily solvent.

[0002]

2. Description of the Related Art Conventionally, the use of an insecticide diluted with water has already been carried out in an aqueous emulsion or the like. Various studies have also been conducted on aqueous aerosols. For example, in JP-A-55-43140, gas (L
PG), a surfactant, and a water-based aerosol formulation in which the mixing ratio of water is specified.
In 267704, an interface selected from a pyrethroid insecticide, a polyoxyethylene-based surfactant having a polyoxyethylene addition mole number of 15 to 30, and a soap-based (eg, alkylbenzene sulfonic acid) surfactant. An aqueous pyrethroid insecticidal composition using an activator is disclosed in JP-A-1-190609, in which a pyrethroid insecticide having 3-phenoxybenzyl, a carbamate compound or an organic phosphorus agent, and a lower alcohol solvent 5-20%. An insecticidal propellant in which a specific pressure-resistant container is filled with a composition comprising a propellant containing water and dimethyl ether.
No. 258607, one or more compounds are selected from each of the pyrethroid group 1 and the other pyrethroid group 1, and an organic solvent (lower alcohol, glycols, etc.) and a buffering agent are added to the compound. From 7.0 to 9.0
Although an aerosol pesticide prepared by using dimethyl ether prepared as described above as a propellant is shown, nothing about the composition of the present invention is shown.

Various studies have been conducted on the use of the surfactant. For example, JP-A-56-43207 discloses an agricultural / horticultural fungicide and a plant virus pest control composition containing polyglycerol fatty acid ester as an active ingredient. And in JP-A-2-67247,
When a poorly water-soluble fatty acid ester in which a fatty acid having 6 to 10 carbon atoms and sorbitan or glycerin are partially ester-bonded is solubilized in water, the partial ester of fatty acid having 6 to 10 carbon atoms and hexaglycerin or decaglycerin is fixed. A method of solubilizing by mixing in a ratio is shown. Further, JP-A-3-68504 discloses a cosmetic product in which an isostearoyl hydrolyzed collagen salt is solubilized by adding diglyceryl oleate. In JP-A-3-293025, polyhydric alcohol fatty acid esters such as sorbitan monooleate, sorbitan monostearate, diglycerin monooleate and hexaglycerin ricinoleate, and polyoxyethylene alkyl ether having a small addition number of polyoxyethylene, etc. OLB emulsions and the like using oil-soluble surfactants having an HLB of 9 or less as the main emulsifier are disclosed, but the use targets thereof are mainly car wax, cosmetics, foods, and paints. Good O / W while using
Although it is intended to obtain a type emulsion or the like, there is no description about a combination with a pyrethroid compound, which is a target other than those, or an application of a surfactant to an aerosol.

[0004]

In recent years, there is a demand for a more environmentally friendly drug containing a small amount of oil components in consideration of the environment. However, since most insecticidal components and acaricidal components are oil-soluble, they have been dissolved in an oily solvent and sprayed or sprayed by various methods. The ULV method, which has been carried out by pest control companies, is one of the spraying methods that uses the least amount of oil. This requires the use of a dedicated injection device, and since this device is expensive, the ULV method is not used in ordinary households. Therefore, as described above, aqueous aerosols have been studied so far, but a sufficient formulation has not been made in view of dispersibility of the active ingredient in water or solubility in an oil solvent.

On the other hand, in the case of aerosol preparations, the high pressure gas control method has been revised due to the complete abolition of CFC gas, and flammable gases can be used in more situations, but conversely, consideration is given to flammability or explosiveness during use. There is a need to do so. In other words, it is required to have lower flammability or explosiveness, or shorter flame length. Therefore, the aqueous aerosol has many advantages also in this respect, and the demand from the market is high. However, it is very difficult to form an aqueous aerosol in which a state in which an organic solvent in which an insecticidal component or the like is dissolved and water are uniformly dispersed is stably maintained. The present invention aims to obtain an aqueous aerosol composition in which these drawbacks are eliminated. A further object of the present invention is to obtain an aqueous aerosol composition capable of stably maintaining a state in which an organic solvent in which an insecticidal component and the like are dissolved and water are uniformly dispersed at the time of spraying.

[0006]

Therefore, the present inventors have
Examining an aqueous aerosol containing an oil-soluble insecticidal component and / or an acaricidal component as an active ingredient, specifically, an oil solution in which the oil-soluble insecticidal component and / or acaricidal component is dissolved, a dispersion aid (surfactant), As a result of studying an aqueous aerosol composed of water and a propellant, an aqueous aerosol composition which can obtain a uniform W / O emulsion by shaking at the time of use by using a specific surfactant is prepared. Was completed. That is, the present invention has achieved the above object by the following means. (1) In an aerosol in which an active ingredient consisting of an oil-soluble insecticidal component and / or an acaricidal component is in a solvent, sorbitan sesquioate, polyoxyethylene (2) lauryl ether, diglyceryl monooleate and At least one compound selected from the group consisting of hexaglycerin polyricinolate, and water,
An aerosol composition for controlling pests, which comprises an oily solvent and a propellant. (2) The pest control aerosol composition according to the item (1), wherein the propellant is liquefied petroleum gas (LPG).

One of the insecticidal components used in the present invention is a pyrethroid compound. Examples of such pyrethroid compounds include d-phenothrin (3-phenoxybenzyl d-cis / trans-chrysanthate) and permethrin (3-phenoxybenzyl dl-cis / trans-2,2-dimethyl-3-).
(2 ', 2'-dichlorovinyl) -cyclopropanecarboxylate), resmethrin ((5-benzyl-3-
Furyl) methyl dl-cis / trans-chrysanthate), allethrin (dl-3-allyl-2-methyl-)
4-oxo-2-cyclopentenyl dl-cis / trans-chrysanthemate), phthalthrin ((N-3,
4,5,6-Tetrahydro-phthalimido) methyl d
1-cis / trans-chrysanthemate), empentrin (1-ethynyl-2-methyl-2-pentenyl d
l-cis / trans-chrysanthemate), 1-ethynyl-2-ethyl-2-pentenyl-2,2,3,3-tetramethyl-cyclopropanecarboxylate, 1-ethynyl-2-methyl-2-pentenyl -2,2-Dimethyl-3- (2 ', 2'-dichlorovinyl) -cyclopropanecarboxylate, d, d-praletrin (d-2
-Methyl-4-oxo-3-propargylcyclopent-2-enyl d-cis / trans-chrysanthemate), tefluthrin (2,3,5,6-tetrafluoro-4-methylbenzyl-3- (2 ' -Chloro-3 ',
3 ', 3'-trifluoro-1-propenyl) -2,2
-Dimethylcyclopropanecarboxylate), benfluthrin (2,3,5,6-tetrafluorobenzyl-
3- (2,2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate) and isomers, derivatives and analogs of these compounds are used, and one or more compounds selected from these pyrethroid compounds Can be incorporated into an aerosol composition for controlling pests.

Further, other insecticidal components include organophosphorus insecticides and carbamate insecticides. , For example, as an organophosphorus insecticide, fenitrothion,
Examples of carbamate insecticides such as chlorpyrifos, marathon, dichlorvos, pyridafenthion and trichlorfon include carbaryl, benfracable, propoxur and the like. And as a compound (general synergist) that enhances the insecticidal efficacy of a pyrethroid compound as one of the insecticidal components, for example, piperonyl butoxide, octachlorodipropyl ether, N- (2-ethylhexyl) -1 -Isopropyl-4-methylbicyclo [2,2,2] oct-5-ene-2,3-dicarboximide, isobornylthiocyanoacetate and N
One or more compounds selected from-(2-ethynyl) -bicyclo [2,2,1] -hepta-5-ene-2,3-dicarboximide and the like may be added to the pest control aerosol. it can.

In the present invention, examples of the acaricidal component include the following acaricides other than the above pyrethroid compounds, organophosphorus insecticides and carbamate insecticides. For example, octachlorodipropyl ether, N-
(2-Ethylhexyl) -1-isopropyl-4-methylbicyclo [2,2,2] oct-5-ene-2,3-
Dicarboximide, isobornyl thiocyanoacetate, N- (2-ethynyl) -bicyclo [2,2,1]-
Hepta-5-ene-2,3-dicarboximide, mixture of benzyl benzoate and fatty acid ester, N, N-
Diethyl-m-toluamide, trihalomidazole derivative, hinoki, cedar and hiba essential oils, menthol, yellowfin extract, citrus peel and seed extract, aromatic sulfonamide derivative, tricyclohexyltin hydroxide, 4, Isopropyl 4'-dibromobenzylate, 2,
3-dihydro-2,2-dimethyl-7-benzo [b] furanylni-N-dibutylaminothio-N-methylcarbamate, silane compound, cinnamic acid derivative, cinnamyl acetate, buflofezine, isoprothiolane, paraoxybenzoate, iodine Formal, phenols,
Phthalates, 3-bromo-2,3-iodo-2-
Propenyl-ethyl carbonate, monoterpene-based ketones, monoterpene-based aldehydes, monoterpene-based epoxides, benzyl salicylate, phenyl salicylate, and the like, and isomers, derivatives, and analogs of these compounds are used. One or more compounds selected from components and / or insecticidal components can be incorporated into the pest control aerosol.

Examples of the dispersion aid in the present invention include one or more compounds selected from sorbitan sesquioleate, polyoxyethylene (2) lauryl ether, diglyceryl monooleate and hexaglycerin polyricinolate. Of these, diglyceryl monooleate is particularly preferable. These compounds belong to surfactants. Generally, the surfactant is composed of a mixture having a different degree of polymerization like other polymer compounds. And, the name of the mixture is conveniently indicated by the name of the most abundant compound in the mixture. For this reason, in the present invention, those named above as the dispersion aid are not only the surfactants sold under these names, but also compounds whose properties or specifications are the same as those of the products described below. Is also included. For example, in the case of sorbitan sesquioleate, it may have any properties that are almost the same as those of NIKKOL SO-15R of Nikko Chemical. Similarly for other dispersion aids,
If it is polyoxyethylene (2) lauryl ether, NIKKOLBL-2 from Nikko Chemical; if it is diglyceryl monooleate, NIKKOLDGM from Nikko Chemical
O-90, and hexaglycerin polyricinoleate are NIKKOL Hexaglyn from Nikko Chemical.
There is no limitation as long as it shows almost the same properties as PR-15.

In the present invention, the oily solvent is not particularly limited as long as it is an oily solvent which has been conventionally used for aerosol agents. For example, hexane, kerosene, kerosene, n
-Aliphatic hydrocarbons such as pentane, iso-pentane and cyclopentane; Aromatic hydrocarbons such as benzene, toluene and xylene; Halogenated hydrocarbons such as dichloromethane and carbon tetrachloride; Ethanol, isopropyl alcohol, ethylene glycol Alcohols such as; ethers such as acetone, methyl ethyl ketone, diethyl ether; esters such as ethyl acetate; nitrites such as acetonitrile; acid amides such as dimethylformamide; vegetable oils such as soybean oil and cottonseed oil;
One or more compounds selected from these oily solvents can be blended. Examples of the propellant in the present invention include liquefied petroleum gas (LPG), propane, n-butane, iso-butane, n-pentane, iso-pentane, cyclopentane, freon gas, dimethyl ether,
Examples thereof include nitrogen gas and liquefied carbon dioxide gas. Especially when liquefied petroleum gas is used as compared with dimethyl ether having high hydrophilicity which is used for an aqueous aerosol, the influence of the surfactant becomes stronger.

Water used as a solvent in the present invention may be deionized water or the like in addition to conventionally used purified water or deionized water. Particularly when deoxygenated water is used, it is useful from the viewpoint of rust prevention of the aerosol container. And if purified water or deionized water is used, it is necessary to prevent rusting of the aerosol container, so sodium benzoate, sodium nitrite, sodium citrate, ammonium citrate, or the like, or an anticorrosive component, or
Buffer components for adjusting pH, such as monosodium phosphate-sodium phosphate, ammonium benzoate-sodium hydroxide, sodium benzoate-benzoic acid, ammonium benzoate-ammonia water, ammonium benzoate-benzoic acid, phosphorus Dipotassium acid-sodium hydroxide,
Sodium hydroxide-sodium dimaleate, Tris
It is preferred to add a combination of malate-sodium hydroxide, sodium carbonate-sodium hydrogen carbonate and the like. Further, when a container having an inner wall coated with various synthetic resins is used for filling the pest control aerosol composition of the present invention, it is not necessary to consider the viewpoint of rust prevention.

In the present invention, the mixing ratio of the active ingredient, the dispersion aid, the oily solvent, the water and the propellant can be exemplified as follows. First, the active ingredient is 0.1 to 10 with respect to the oily solvent.
(V / v)% and a dispersion aid of 1.0 to 15 (v / v)% can be blended to prepare an oily stock solution. What is composed of the above-mentioned active ingredient, dispersion aid and oily solvent is referred to as "oil stock solution". And as a ratio which mixes this oily stock solution and water, oily stock solution: water 1: 29-1: 1 can be illustrated. And the undiluted solution of the aerosol formulation (“Mixed solution of oily undiluted solution and water”
Like this. ): The mixing ratio of the propellant is preferably 9: 1 to 1: 9. Particularly when the propellant is liquefied petroleum gas, the mixing ratio of undiluted solution: propellant is preferably 7: 3 to 3: 7.

In addition to the insecticidal component and acaricidal component of the present invention, various chemicals can be added. For example, pests and rodent repellents, bactericides, fungicides, deodorants, fragrances,
A coloring agent or the like can also be blended, and as a pest and rodent repellent, 2,3,4,5-bis (δ-butylene)-
Tetrahydrofurfural, N, N-diethyl-m-toluamide, di-n-propylisocincolmate, di-
n-Butyl acetic acid, 2-hydroxyethyl octyl sulfate, 2-t-butyl-4-hydroxyanisole, 3-
T-butyl-4-hydroxyanisole, cycloheximide, β-nitrostyrene cyanoacrylonitrile, tributyltin hydrochloride, trinitrobenzene-aniline complex, naphthalene, and the like are used as bactericides or fungicides.
2,4,4'-Trichloro-2'-hydroxydiphenyl ether, 2,3,5,6-tetrachloro-4-
(Methylsulfonyl) pyridine, alkylbenzylmethylammonium chloride, benzylmethyl- {2-
[2- (p-1,1,3,3-tetramethylbutylphenoxy) ethoxy] ethyl} ammonium chloride,
4-Isopropyltropolone, N, N-dimethyl-N '
-Phenyl-N '-(fluorodichloromethylthio) sulfonamide, 2- (4'-thiazolyl) benzimidazole, N- (fluorodichloromethylthio) -phthalimide, 6-acetoxy-2,4-dimethyl-m-dioxin, isopropyl Methylphenol, O-phenylphenol, p-chloro-m-xylenol, etc. are used, as deodorant, lauric acid methacrylate, etc., and as fragrance, essential oil component of rush, citronella, lemon, lemongrass, Orange, eucalyptus, lavender, etc. can be added.

The pests in the present invention include pests living indoors and outdoors and indoor dust mites.
Examples of the pests that live indoors and outdoors include sanitary pests and daily pests. For example, sanitary pests include cockroaches (German cockroaches, black cockroaches, American cockroaches, etc.), flies (housefly, blowfly, fleshfly, etc.), mosquitoes (such as house mosquito, mosquito, mosquito), lice, fleas, and the like. Life pests include termites (winged ants), black ants, spiders, bees, bedbugs, centipedes, geckages, millipedes, shibanbushi, horned wasps, chironomids, butterfly flies, stink bugs, leafhoppers, bark beetles, pill bugs, wallworms, spots, squid, koga, and beetles. Nukaka etc. can be illustrated. Furthermore, as indoor dust mites, mites that propagate and grow indoors, or as mites that enter the room, for example, Dermatophagoides farinae mites such as Dermatophagoides farinae, Dermatophagoides farinae, Plutella mites such as Dermatophagoides farinae, Mite mites, dust mites such as dust mites, etc. Examples thereof include animal mites such as phytoseiid mites, pest mites such as Plutus mite and Minami mites, dust mites, mite mites, house mites, house dust mites, trichomes, mites, ticks and the like.

As the aerosol container filled with the pest control aerosol of the present invention, the injection port diameter of the push button is 0.3 to 0.8 mm and the inner diameter of the stem hole is 0.3 to 0.
A container having a diameter of 6 mm and an inner diameter of the under tap of 0.3 to 2.2 mm is preferable. When the pest control aerosol of the present invention filled in such an aerosol container is used, the aerosol container is shaken, and the oily solvent and propellant in which the active ingredient is dissolved is mixed with water to obtain W / O. After being dispersed to a state close to an emulsion, it can be used in the same manner as a usual insecticidal aerosol.

[0017]

It is extremely difficult to uniformly disperse the oily solvent in which the oily insecticidal component and / or the acaricidal component is dissolved and water, and to maintain the state in a stable manner. In the present invention, by using a specific dispersion aid, an oily insecticidal component and //
Alternatively, the acaricidal component can be sufficiently dispersed during a relatively short period of time, such as a jetting time. Moreover, even if a propellant is added and used, the insecticidal effect is equivalent or higher. Furthermore, since the aerosol of the present invention contains water in the solvent, the flame length is shorter than that of the conventional aerosol, and therefore the danger in use can be significantly reduced. When not used, the active ingredient in the oily solvent has less opportunity to come into contact with water, and thus has less extent of decomposition by water.

[0018]

EXAMPLES The pest control aerosol composition of the present invention will be described in more detail by the following test examples and formulation examples. However, the present invention is not limited to the following examples. Test Example a. Surfactant selection test The composition used in the prescription test was No. 1 kerosene solution 2 containing 2.24% neopinamine f (d-T80 phthalthrin) and 0.3% krysulone f (d-T80 resmethrin) as active ingredients.
50 ml of 5 ml and 3.14 g of various surfactants with No. 1 kerosene
An oily stock solution composition (comprising the above-mentioned active ingredient, oily solvent and dispersion aid (surfactant)) was prepared by filling up to ml. Then, the oily stock solution composition 6.65 m
1, purified water 15.85 ml and LPG 27.50 ml
Was filled in a container to prepare an aerosol composition.

B. Method and Results b-1. Solubility At room temperature, about 50 ml of a stock oil beaker was placed in a 100 ml glass beaker, stirred well with a glass rod, and then allowed to stand to determine the degree of cloudiness to the oily stock solution composition of Table 1. Each of the used surfactants was visually observed. As a result, transparently dissolved substances are shown in the table by "⊚", slightly clouded ones by "○", those more clouded than "○" by "Δ", and separated ones by "X". b-2. Emulsifying property 50 ml of aerosol composition was filled in a 100 ml pressure resistant glass test bottle (manufactured by Nippon Kobunshi Co., Ltd.), shaken vigorously by hand for about 50 times, and allowed to stand at room temperature for 24 hours, followed by water and oil (LP).
The mixed solution of (including G) is uniformly emulsified and dispersed (white turbidity), or the mixed solution is not uniformly emulsified and dispersed due to splitting into multiple layers or generation of precipitates (white turbidity). It was visually observed for each surfactant used in the aerosol composition shown in Table 1. As a result, those which were uniformly dispersed are shown by "O", and those which were not uniformly emulsified and dispersed are shown by "X".

B-3. Emulsion stability 50 ml of an aerosol composition was filled in a 100 ml pressure-resistant glass test bottle, shaken vigorously by hand for about 50 times, and then left to stand, and the time "about 50% of the upper layer becomes transparent" is shown in Table 1. The measurement was performed for each of the surfactants used in the aerosol composition. As a result, separation that occurred within 10 seconds was “x”, and that that occurred between 10 and 20 seconds was “△”,
Those that did not separate even after 30 seconds or more are shown in the table by "⊚". In the state that "about 50% of the upper layer becomes transparent", the liquid in the 100 ml pressure resistant glass test bottle was separated into two layers, a transparent upper layer and a cloudy lower layer before shaking,
By shaking, it becomes a uniform cloudy liquid. But,
This means a state in which after shaking, the bottle is allowed to stand and gradually becomes transparent from the liquid surface, and about half of the upper layer becomes transparent.

[0021]

[Table 1]

Formulation Example Aerosol compositions for controlling pests shown in Table 2 were prepared.

[0023]

[Table 2]

C. Insecticidal test The pest control aerosol composition of the present invention D40, Comparative 1 and Comparative 2 of the formulation shown in Table 2 was filled in a pressure resistant container (valves and buttons were manufactured by Maruichi Co., Ltd.). Then, each pest control aerosol composition was tested by a peat gradient device described in the guideline for insecticides (Nippon Yakugyo Shimbun 1988). The sample insect is a housefly ("M
Usca domestica ") about 100 adult (male / male) adults of the Denken system (reared in successive generations at Earth Pharmaceutical Co., Ltd.)
Female = 1/1) was used. Then, 1.5 ± 0.1 ml of the content of each aerosol composition was sprayed into a peat grading apparatus to compare insecticidal effects. The insecticidal effect is KT50 (time (minutes) until 50% of the tested insects lie down), KT90
(Time (minutes) until 90% of the test insects lie down) and the mortality rate after 24 hours were measured and are shown in Table 3.

[0025]

[Table 3]

D. Flame Length Test It was measured by a flame length test method based on the high pressure gas control method. That is, the sample is immersed in a constant temperature water layer of 24 to 26 ° C. for about 30 minutes to bring the temperature of the content to 24 to 26 ° C., and the injection port of the sample is placed at a position 15 cm from the burner of the test apparatus. Then, the length of the flame of the burner is adjusted to 4.5 to 5.5 cm, and the height of the burner is adjusted so that the lower portion of the sprayed contents passes through the upper third of the flame of the burner. Then, the measurer places the eye level on the horizontal line passing through the injection port, located about 1.5 m away from the side of the flame and positioned at the expected tip and end of the flame. In this state, press the injection button to inject the best injection, and after 3 seconds, make the tip and end of the flame vertical and measure the horizontal distance of the flame as the flame length. As a result of using D (40) of the present invention shown in Table 3 as a sample, the flame length was 6.3 cm. By the way, in the conventionally used aerosol composition comprising an oily solvent and LPG, the flame length of the aerosol using the same valve is about 40 cm. As described above, the aerosol composition of the present invention is highly safe because it has a short flame length during use, and has a great advantage of being less dangerous because it contains water even in a stored state.

[0027]

INDUSTRIAL APPLICABILITY The aerosol composition for controlling pests of the present invention is shaken at the time of use, whereby the oily solvent containing the active ingredient is quickly and uniformly dispersed in the aqueous system. The active ingredient and the solvent (including the oily solvent, water and the propellant) are not separated during use, and the active ingredient is sprayed at a uniform concentration, so that an effective aerosol can be formed. Further, in terms of efficacy, the same or higher effect was exhibited as compared with the conventional oil solvent. Since the aerosol composition of the present invention has a short flame length during use, it is highly safe, and since it contains water even in a preserved state, it has a great advantage that it is extremely less dangerous.

Claims (2)

[Claims] 1. An aerosol composition in which an active ingredient comprising an oil-soluble insecticidal component and / or an acaricidal component is in a solvent, and sorbitan sesquioleate, polyoxyethylene (2) lauryl ether, diglyceryl as a dispersion aid. An aerosol composition for controlling pests, which comprises at least one compound selected from the group consisting of monooleate and hexaglycerin polyricinolate, water, an oily solvent and a propellant. 2. The pest control aerosol composition according to claim 1, wherein the propellant is liquefied petroleum gas.