JPH04330003A - Insecticidal liquid composition for liquid-sucking wick - Google Patents

Abstract

PURPOSE:To obtain the subject composition exhibiting continuous insecticidal effect over a long period and having improved total evaporation amount and effective evaporation rate of insecticide by compounding a compound having clogging-prevention effect in an organic solvent solution of an insecticide. CONSTITUTION:An organic solvent solution of an insecticide such as pyrethroidal insecticide, carbamate-type insecticide and organic phosphorus insecticide is compounded with 0.2-1.0wt.% (preferably 0.3-0.9wt.%) of one or more compounds selected from 3,5-di-t-butyl-4-hydroxytoluene, 3-t-butyl-4-hydroxyanisole, mercaptobenzimidazole, dilauryl-thio-di-propionate, 3-t-butyl-4-methoxyphenol, alpha-tocopherol, ascorbic acid, erythorbic acid, 2,2'-methylene-bis(6-t-butyl-4- methylphenol), phenyl-beta-naphthylamine, N,N'-diphenyl-p-phenylenediamine, etc. The composition is suitable for a sucking-type thermal evaporation insecticidal device utilizing a liquid-sucking wick.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to an insecticidal liquid composition for liquid-absorbing cores,
More specifically, the present invention relates to an improved insecticidal liquid composition suitable for a suction heat evaporation type insecticidal device using a liquid-absorbing wick.

0002

[Prior art and its problems] Conventionally, a method for heating and evaporating chemicals for the purpose of killing insects has been to use a device such as an electric mosquito repellent on a porous substrate (solid mat) such as fiberboard.
A commonly used method is to heat and evaporate insecticides that have been adsorbed onto them. However, in this method, the amount of insecticide that can be impregnated into one solid mat is naturally limited, and it is necessary to replace the mat and dispose of the used mat. Moreover, the volatilization rate of the insecticide adsorbed on the mat decreases over time, which is a serious drawback.In addition, the effective volatilization rate of the insecticide adsorbed on the mat is only about 50%; The insecticide residual rate is as high as about 10%, making it impossible to maintain a stable insecticidal effect over a long period of time, and resulting in considerable economic disadvantage.

[0003] As a heating evaporation method that can solve the problem of replacing the mat and the disadvantage that the insecticidal effect disappears within a short time that is seen in the use of solid mats, and can maintain the insecticidal effect over a long period of time, the insecticide is applied in the form of a solution. A method of heating and evaporating the insecticide while sucking it up with a suction wick (liquid wick) has been considered, and in fact, various insecticide evaporation devices using such a liquid wick have been proposed. In these devices, a solvent solution of an insecticide is placed in a suitable container, which is sucked up using a liquid-absorbing wick made of felt, etc., and heated and evaporated from the upper part of the liquid-absorbing wick.

However, when such suction heat evaporation insecticide devices are actually used, the solvent constituting the insecticide liquid quickly evaporates due to the heating of the liquid absorption core.
The insecticide liquid gradually becomes concentrated inside the core and turns into a resin.
The core material may become smoky and clogged, making it impossible for the insecticidal solution to be sucked up and evaporated, making it impossible to achieve a long-term sustained effect, and furthermore, the insecticidal effect cannot be prevented from decreasing over time. The effective volatilization rate was low and the residual rate was high. There are many possible causes of the various adverse effects seen in such heating transpiration methods using wicks, including the type of wick and the type of solvent, as well as the type of insecticide, concentration, heating conditions, etc. It was thought that it would be difficult to eliminate the above-mentioned disadvantages.

[0005] An object of the present invention is to provide an insecticidal liquid composition for a liquid-absorbing core suitable for a suction-type heating evaporation type insecticidal device. In particular, the present invention can be used in the above-mentioned device to avoid clogging of the liquid absorption wick, achieve a long-lasting insecticidal effect, and improve the total amount of insecticide volatilization and effective volatilization rate. It is an object of the present invention to provide an improved insecticidal liquid composition.

[0006]

[Means for Solving the Problems] The present invention provides a solution of an insecticide in an organic solvent containing 3,5-di-t-butyl-4-hydroxytoluene, 3-t-butyl-4-hydroxyanisole, 3, 5-di-t-butyl-4-hydroxyanisole, mercaptobenzimidazole, dilauryl-thio-di-propionate, 3-t-butyl-4-methoxyphenol, 2,6-di-t-butyl-4- Ethylphenol, stearyl-β-(3,5-di-t-butyl-
4-hydroxyphenyl)propionate, α-tocopherol, ascorbic acid, erythorbic acid, 2,2'
-methylene-bis-(6-t-butyl-4-methylphenol), 2,2'-methylene-bis-(6-t-butyl-4-ethylphenol), 4,4'-methylene-bis-( 2,6-di-t-butylphenol), 4,4'
-butylidene-bis-(6-t-butyl-3-methylphenol), 4,4'-thio-bis-(6-t-butyl-3-methylphenol), 1,1-bis-(4-hydroxy phenyl)cyclohexane, 1,3,5-trimethyl-2,4,6-tris(3,5-di-t-butyl-
4-hydroxybenzyl)benzene, tris(2-methyl-4-hydroxy-5-t-butylphenyl)butane, tetrakis[methylene(3,5-di-t-butyl-4
-hydroxyhydrocinnamate)] methane, phenyl-β-naphthylamine, N,N'-diphenyl-p-phenylenediamine, 2,2,4-trimethyl-1,2-
Dihydroquinoline polymer and 6-ethoxy-2,2,
The present invention relates to an insecticidal liquid composition for a liquid-absorbing core, characterized in that it contains at least one compound selected from 4-trimethyl-1,2-dihydroquinoline.

[0007] The insecticidal liquid composition for liquid-absorbing wicks of the present invention can be used in a suction-type heating evaporation type insecticidal device to prolong the life of the wick without clogging the liquid-absorbing wick. In addition, based on this, the transpiration properties (volatilization amount and effective volatilization rate) of the insecticide can be significantly improved, and excellent insecticidal effects can be sustained over a long period of time.

[0008] As the insecticide in the present invention, any of the various chemicals conventionally used for exterminating pests can be used. The drugs include various pyrethroid insecticides, carbamate insecticides, organophosphorus insecticides, and the like. Specific examples thereof include the following.

・3-allyl-2-methylcyclopentane
2-en-4-one-1-yl dl-cis/trans-chrysanthemate (generic name: allethrin; trade name: pinamine; manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as AA)・3
-Allyl-2-methylcyclopent-2-en-4-one-1-yl d-cis/trans-chrysanthemate (trade name: Pinamine Forte: manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as AB) ・d-3- Allyl-2-methylcyclopent-2-en-4-one-1-yl d-trans-chrysanthemate (trade name Exlin: manufactured by Sumitomo Chemical Co., Ltd., hereinafter A)
C) ・3-allyl-2-methylcyclopent-2-ene-4
-on-1-yl d-trans-chrysanthemate (generic name: bioallethrin, hereinafter referred to as AD)・N-(
3,4,5,6-tetrahydrophthalimido)-methyl
dl-cis/trans-chrysanthemate (generic name: phthalthrin; trade name: neopinamine; manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as AE) -5-benzyl-3-furylmethyl d-cis/trans-chrysanthemate (generic name: Resmethrin: Trade name: Crylonfuorte: Manufactured by Sumitomo Chemical Co., Ltd., hereinafter A
・5-(2-propargyl)-3-furylmethyl chrysanthemate (generic name flamethrin, hereinafter referred to as AG) ・3-phenoxybenzyl 2,2-dimethyl-3
-(2',2'-dichloro)vinylcyclopropane
Carboxylate (generic name: permethrin; trade name: Exmin; manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as AH)・3
-Phenoxybenzyl d-cis/trans-chrysanthemate (generic name: Phenothrin; trade name: Sumitrin:
(manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as AI)・α-cyanophenoxybenzyl isopropyl-4-chlorophenyl acetate (generic name: Fuenvalerate; trade name: Sumicidin: manufactured by Sumitomo Chemical Co., Ltd., hereinafter referred to as AJ)・d -3-allyl-2-methylcyclopent-2-en-4-one-1-yl d-trans-chrysanthemate (trade name Exlin: manufactured by Sumitomo Chemical Co., Ltd., hereinafter A)
・(S)-α-cyano-3-phenoxybenzyl (1R
, cis)-3-(2,2-dichlorovinyl)-2,2-
Dimethylcyclopropanecarboxylate (hereinafter referred to as AL) ・(R,S)-α-cyano-3-phenoxybenzyl
(1R,1S)-cis/trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate (hereinafter referred to as AM) ・α-cyano-3-phenoxybenzyl d-cis/
Trans-chrysanthemate (hereinafter referred to as AN)・1-
Ethynyl-2-methyl-2-pentenyl cis/trans-chrysanthemate (hereinafter referred to as AO)・1-ethynyl-2-methyl-2-pentenyl 2,2-dimethyl-3-(2-methyl-1-propenyl) Cyclopropane-1-carboxylate (hereinafter referred to as AP) 1-ethynyl-2-methyl-2-pentenyl 2,2,3,
3-tetramethylcyclopropanecarboxylate (hereinafter referred to as AQ) ・1-ethynyl-2-methyl-2-pentenyl 2,
2-dimethyl-3-(2,2-dichlorovinyl)cyclopropyne-1-carboxylate (hereinafter referred to as AR).
O,O-dimethyl O-(2,2-dichloro)vinyl phosphate (hereinafter referred to as AS) ・o-isopropoxyphenyl methyl carbamate (hereinafter referred to as AT) ・0,0-dimethyl 0-(3-methyl-4- Nitrophenyl) thionophosphate (hereinafter referred to as AU)・0,0-diethyl 0-2-isopropyl-4-
Methyl-pyrimidyl-(6)-thiophosphate 0
,0-dimethyl S-(1,2-dicarboethoxyethyl)-diotyphosphate The above insecticides include various commonly used efficacy enhancers, volatilization rate improvers, deodorants, fragrances, etc. Additives can optionally be added. Potency enhancers include piperonyl butoxide, N-propylisome, MGK-264, Cinepirin 222, Cinepirin 500, Reesen 38
4, IBTA, S-421, etc., phenethyl isothiocyanate, dimethyl himixate, etc. as a volatilization rate improver, and lauric acid methacrylate (L) as a deodorizer.
Examples of fragrances include citral and citronellal.

[0010] The above insecticide is prepared in the form of a solution. As the solvent for preparing the insecticide solution, any of various organic solvents, typically hydrocarbon solvents, can be used. In particular, aliphatic hydrocarbons with a boiling point range of 150 to 350°C (
Paraffinic hydrocarbons and unsaturated aliphatic hydrocarbons are preferred, and among these, n-paraffins, isoparaffins, etc. are preferred because they are practically non-toxic, odorless, and pose a very low risk of fire. Examples of organic solvents other than the above-mentioned hydrocarbons include glycerin, propylene glycol, methanol, acetone, xylene, chlorcene, isopropanol, and chloroform.

The above-mentioned solvent solution of the insecticide is appropriately determined depending on the type of insecticide to be used and is not particularly limited, but the insecticide concentration is usually about 1 to 10% by weight, preferably 3 to 8% by weight. %.

[0012] The composition of the present invention requires that at least one compound selected from the following compound group is added to the organic solvent solution of the above insecticide.

3,5-di-t-butyl-4-hydroxytoluene (hereinafter referred to as CA) 3-t-butyl-4-hydroxyanisole (hereinafter referred to as CB)
) 3,5-di-t-butyl-4-hydroxyanisole (
(hereinafter referred to as CC) Mercaptobenzimidazole (hereinafter referred to as CD) Dilauryl-thio-di-propionate (hereinafter referred to as CE)
2,2'-methylene-bis-(6-t-butyl-4-methylphenol) (hereinafter referred to as CF) 2,2'-methylene-bis-(6-t-butyl-4-ethylphenol) (hereinafter referred to as CG 4,4'-methylene-bis-(2,6-di-t-butylphenol) (hereinafter referred to as CH) 4,4'-butylidene-bis-(6-t-butyl-3-
methylphenol) (hereinafter referred to as CI) 4,4'-thio-bis-(6-t-butyl-3-methylphenol) (
(hereinafter referred to as CJ) 1,1-bis-(4-hydroxyphenyl)cyclohexane (hereinafter referred to as CK) 1,3,5-trimethyl-2,4,6-tris (3,5
-di-t-butyl-4-hydroxybenzyl)benzene (hereinafter referred to as CL) Tris(2-methyl-4-hydroxy-5-t-butylphenyl)butane (hereinafter referred to as CM) Tetrakis[methylene(3,5-di -t-butyl-4-
hydroxyhydrocinnamate)] methane (hereinafter referred to as CN), phenyl-β-naphthylamine (hereinafter referred to as CP) N,
N'-diphenyl-p-phenylenediamine (hereinafter referred to as CQ
) 2,2,4-trimethyl-1,2-dihydroquinoline polymer (hereinafter referred to as CR) 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline (hereinafter referred to as CS) 3-t-butyl -4-Methoxyphenol (hereinafter referred to as CU) 2,6-di-t-butyl-4-ethylphenol (hereinafter referred to as CV) Stearyl-β-(3,5-di-t-butyl-4-hydroxyphenyl)propionate (hereinafter referred to as CW) α
-Tocopherol (hereinafter referred to as CX) Ascorbic acid (
(hereinafter referred to as CY) and erythorbic acid (hereinafter referred to as CZ).

The above compounds CA to CZ may be used alone or in combination of two or more. The amount used is not particularly limited as long as the desired effect of preventing clogging of the liquid absorbent core of the present invention can be obtained by the combination thereof, but it is not limited to the amount used in the insecticidal liquid composition for the liquid absorbent core of the present invention that is normally obtained. The amount is about 1.0% by weight or less, usually about 0.2 to 1.
The content is preferably 0% by weight, preferably 0.3 to 0.9% by weight, and this provides a long-term clogging effect on the liquid absorbent wick, resulting in the continuous insecticidal effect intended by the present invention. The effect is produced.

The composition of the present invention can be applied to suction type heating evaporation type insecticidal devices using various conventionally known liquid-absorbing wicks, and can exhibit the desired excellent effects described above. The above-mentioned apparatus to which the composition of the present invention can be applied includes, for example, Japanese Patent Publication No. 52-1210
It is described in Publication No. 6, Japanese Utility Model Application Publication No. 58-45670, etc. A specific example thereof is shown in the attached drawing.

FIG. 1 is a schematic diagram of a suction type heating evaporation type insecticidal device suitable for applying the insecticidal liquid composition for a liquid absorbent wick (1) of the present invention. core support (
2), a liquid-absorbing wick (1) inserted into the container with its upper part protruding, and a hollow disc-shaped container for indirectly heating the upper side surface thereof. Heating element (4
), a heating element support stand (7) having a support part (5) and support legs (6) for supporting the heating element (4), and the heating element (4) is energized. It has a cord (not shown) for generating heat.

The liquid-absorbing core (1) used in the above device may be made of various commonly used materials, such as felt, cotton, pulp, non-woven fabric, asbestos, inorganic molded materials, etc. Felt core, unglazed material, etc. Cores, pulp cores and inorganic molded cores are preferred. Specific examples of the above-mentioned inorganic molded cores include porous porcelain, glass fibers, inorganic fibers such as asbestos hardened with binders such as gypsum and bentonite, kaolin, activated clay, talc, diatomaceous earth, clay, perlite, and bentonite. , alumina, silica, alumina-silica, titanium, vitreous volcanic rock calcined powder, vitreous volcanic ash calcined powder, etc., alone or together with wood powder, charcoal powder, activated carbon, etc., as a sizing agent such as dextrin, starch, gum arabic, synthetic An example is one hardened with glue CMC or the like. A particularly preferable liquid-absorbing core is a liquid-absorbing core in which a sizing agent is added to 100 parts by weight of the above mineral powder and 10 to 300 parts by weight of a mixture of wood flour or the wood flour mixed with an equal weight of charcoal powder and/or activated carbon. It is manufactured by blending the mixture until it becomes 5 to 25% by weight, then adding water to the mixture, kneading, extrusion molding, and drying. The liquid absorption core has a liquid absorption rate of 1 to 40 hours, preferably 8 to 40 hours.
Preferably, it is 21 hours. This liquid absorption speed is 7 mm in diameter x 70 m in length in n-paraffin liquid at a liquid temperature of 25°C.
It means the value obtained by immersing a liquid-absorbing wick of 15 mm to a depth of 15 mm from the bottom and measuring the time it takes for n-paraffin to reach the top of the wick. Furthermore, in addition to the mineral powder, wood flour, and sizing agent mentioned above, pigments such as macarite green, sorbic acid and its salts, and mold inhibitors such as dehydroacetic acid may be added to the liquid-absorbing core as necessary. You can also do it.

[0018] Also, as the heating element used in the above device, a heating element that generates heat when energized is commonly used.
Without being limited thereto, any known heating element may be used, such as an air oxidation heating material, a heating material using a platinum catalyst, or the like.

The method of applying the composition of the present invention to the above-mentioned device to kill insects may be the same as the conventional method of using this type of device. All you have to do is heat the liquid core. The heating temperature is appropriately determined depending on the type of insecticide, etc., and is not particularly limited, but it is usually set to a heating element surface temperature in the range of about 70 to 150°C, preferably 135 to 145°C, and this Core surface temperature approximately 60~
Corresponds to 135°C, preferably about 120-130°C.

[0020] Thus, by using the insecticidal liquid composition for a liquid absorbent core of the present invention, clogging of the liquid absorbent core can be reliably avoided,
The insecticide can be continuously volatilized for a long period of time at a concentration of the insecticide that can exhibit a sufficient insecticidal effect.

[0021]

[Examples] Examples will be given below to explain the present invention in more detail.

[0022]

[Examples 1 to 64] Insecticide No. 1 shown in Table 1 below. A.A.
~AU, an organic solvent, and each of the compounds CA to CZ were added and mixed at a predetermined mixing ratio to prepare the composition of the present invention (Example No.
1 to 64) were obtained.

Comparative Examples 1 to 14 Examples 1 to 14 except that compounds CA to CZ were not added and mixed.
Comparative insecticidal liquid compositions (Comparisons 1 to 14) in the same manner as No. 64
I got it.

[0024]

[Table 1]

[0025]

[Table 2]

[0026]

[Table 3]

[0027]

[Table 4]

[0028] The symbols in the column of solvent in Table 1 indicate the following.

BA...boiling point 150-180°C/760mm
Aliphatic hydrocarbons of Hg BB...Aliphatic hydrocarbons of boiling point 180-210°C/760mmHg BC...Aliphatic hydrocarbons of boiling point 210-240°C/760mmHg BD...Aliphatic hydrocarbons of boiling point 240-270°C/760mmHg BE... Aliphatic hydrocarbon with a boiling point of 270 to 300°C/760 mmHg BF...Aliphatic hydrocarbon with a boiling point of 300 to 350°C/760 mmHg The compositions of the present invention prepared in Examples 1 to 64 above and the comparative compositions obtained in Comparative Examples 1 to 14 50 ml of each product was placed in the container (3) shown in FIG. A transpiration test of the pesticide in the sample was conducted. The liquid-absorbing core (1) was made by adding 20 parts by weight of starch and water to 60 parts by weight of perlite and 20 parts by weight of wood flour, kneading, extrusion molding, and drying (7 mm in diameter x 70 mm in length, oil absorption rate of about 14 mm).
time), and the heating element (4) has an inner diameter of 10 mm and a thickness of 1
A 0 mm hollow disc-shaped heating element was used in each case.

[0030] The amount of volatilized insecticide was determined by collecting the volatilized vapor by suction into a silica gel column every hour, extracting the silica gel with chloroform, concentrating it, and quantitatively analyzing it using a gas chromatograph.

10 hours after the start of heating the composition sample, 1
The results of the insecticide volatilization amount mg/hr per hour after 00 hours, 200 hours, 300 hours, and 400 hours are shown in Table 2 below.

[0032]

[Table 5]

[0033]

[Table 6]

[0034]

[Table 7]

Table 2 above shows that when the composition of the present invention is used, the amount of pesticide volatilization can be significantly improved, and this improved amount of volatilization is almost reduced even 400 hours after the start of heating. It is clear that sustained expression can be achieved without any problems.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an example of a device suitable for applying the insecticidal composition for liquid-absorbing cores of the present invention.

[Explanation of symbols]

(1) Liquid absorption core (3) Container containing the composition of the present invention (4) Heating element

Claims (1)

[Claims] Claim 1: In an organic solvent solution of an insecticide, 3,5-di-
t-Butyl-4-hydroxytoluene, 3-t-butyl-4-hydroxyanisole, 3,5-di-t-butyl-4-hydroxyanisole, mercaptobenzimidazole, dilauryl-thio-di-propionate, 3 −
t-butyl-4-methoxyphenol, 2,6-di-t
-butyl-4-ethylphenol, stearyl-β-(
3,5-di-t-butyl-4-hydroxyphenyl)propionate, α-tocopherol, ascorbic acid,
Erythorbic acid, 2,2'-methylene-bis-(6-t
-butyl-4-methylphenol), 2,2'-methylene-bis-(6-t-butyl-4-ethylphenol)
, 4,4'-methylene-bis-(2,6-di-t-butylphenol), 4,4'-butylidene-bis-(6-
t-butyl-3-methylphenol), 4,4'-thio-bis-(6-t-butyl-3-methylphenol),
1,1-bis-(4-hydroxyphenyl)cyclohexane, 1,3,5-trimethyl-2,4,6-tris(
3,5-di-t-butyl-4-hydroxybenzyl)benzene, tris(2-methyl-4-hydroxy-5-t
-butylphenyl)butane, tetrakis[methylene(3
, 5-di-t-butyl-4-hydroxyhydrocinnamate)]methane, phenyl-β-naphthylamine, N,
N'-diphenyl-p-phenylenediamine, 2,2,
A liquid absorbent core containing at least one compound selected from 4-trimethyl-1,2-dihydroquinoline polymer and 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline. Insecticidal liquid composition for use.