JPS60161902A - Insecticidal solution composition for core to suck up solution - Google Patents

Abstract

PURPOSE:The titled composition not causing clogging of core to suck up a solution, having extremely improved vaporizing properties, showing improved insecticidal effect for a long period, obtained by blending a solution of an insecticide in an organic solvent with specific compounds such as alpha-tocopherol, ascorbic acid, etc. CONSTITUTION:A solution of an insectidie of pyrethroid, carbamate, etc. in an organic solvent is blended with 0.2-1.0wt%, preferably 0.3-0.9wt% compound selected from 26 kind compounds such as (i) 3,5-di-t-butyl-4-hydroxytoluene, (ii) 3-t-butyl-4-hydroxyanisole, (iii) mercaptobenzimidazole, (iv) dilauryl-thio-di-propionate, (v) 2,2'-methylene-bis(6-t-butyl-4-methylphenol), (vi) 1,1-bis-(4-hydroxyphenyl)cyclohexane, (vii) phenyl-beta-naphthylamine, (viii) 2,2,4-trimethyl-1,3-dihydroquinoline polymer, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to an insecticidal liquid composition for a liquid-absorbing wick, and more particularly to an improved insecticidal liquid composition suitable for a suction type heating evaporation type insecticidal device using a liquid-absorbing wick.

Technical Background Conventionally, the method of heating and evaporating insecticides for the purpose of killing insects involves adsorbing insecticides onto a porous substrate (solid mat) such as fiberboard using a device such as an electric mosquito repellent. A commonly used method is to evaporate it by heating. However, in this method, the amount of insecticide that can be impregnated into one solid mat is naturally limited, and the mat must be replaced and the used mat must be disposed of. Moreover, the volatilization rate of the insecticide adsorbed to the mat decreases over time, which is a serious drawback, and the effective volatilization rate of the insecticide adsorbed to the mat is only about 50%. The insecticide residual rate is as high as about 10%, and it is not possible to maintain a stable insecticidal effect over a long period of time, but it is economically disadvantageous.

As a heating transpiration method that can maintain the insecticidal effect over a long period of time, it solves the problem of replacing the mat and the disadvantage that the insecticidal effect disappears within a short period of time when using a solid mat. A method of heating and evaporating the insecticide while sucking it up through a wick (liquid-absorbing wick) has been considered, and in fact, various insecticide evaporation devices using such a liquid-absorbing 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 suction wick, and the insecticide liquid gradually evaporates inside the wick. Condensed and resinized, the core material is smoked and clogged, making it impossible for the insecticidal solution to be absorbed and evaporated, making it impossible to achieve a long-term sustained effect, and furthermore, the insecticidal effect is not effective. Deterioration over time could be avoided, and 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.

OBJECTS OF THE INVENTION 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.

The present invention can also be used in the above-mentioned device to avoid clogging of the liquid absorbent wick, achieve a long-term sustainable insecticidal effect, and improve the total amount of insecticide volatilization and effective volatilization rate. An object of the present invention is to provide an improved insecticidal liquid composition.

BACKGROUND OF THE INVENTION The present invention provides 3,5-di-t-
Butyl-4-dihydro+citoluene, 3-butyl-4
-SidoOcyanisole, 3,5-di-t-butyl-4
-cyanisole, mercaptobenzimidaryl, dilauryl-thio-diprodionate, 2-t-
Butyl-4-methoxyenol, 3-l-butyl-4
-methoxyenol, 2,6-di-t-butyl-4-
Ethylphenol, stearyl-β-(3+ 5-:
/ -'--methylphenol), 2,2-methylene-
Disu (6-!-butyl-4-ethylphenol), 4
．． 4'-methylene-his (2,6-di-t-butylphenol), 4,4'-butylidene-dis((,-1-butyl-3-methylphenol), 4,4-thio-bis(
6-tert-butyl-3-methylphenol), 1,1(4-tert-butyl-3-methylphenol), 1.3.
5-trimethyl-2,4,6-t-lis(3t5-di-
tert-butyl-4-dibenzyl)benzene, tris(2-methyl-4-dibenzyl), tris(2-methyl-4-dibenzyl), tris(2-methyl-4-dibenzyl), tris(2-methyl-4-dibenzyl), tris(5-tert-butylphenyl)butane,
methane, octadecyl-3,5-di-l-butyl-4-butyl drocinnamate, phenyl-β-naphthylamide, N, N-diphenyl-l -phenylenediamine,
2.2.4-) dimethyl-1,3-dihydrodenoline polymer and 6-ethyl-2.2.4-trimethyl-1
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 the group consisting of , 3-dishidodronoline, and the like.

The insecticidal liquid composition for liquid-absorbing wicks of the present invention can be used in suction-type heating evaporation-type insecticidal devices, and does not cause clogging of the liquid-absorbing wick, making it possible to extend the life of the wick. Based on this, the transpiration performance (volatilization amount and effective volatilization rate) of pesticides can be significantly improved,
Excellent insecticidal effects can be maintained over a long period of time.

As the insecticide in the present invention, any of the various agents conventionally used for exterminating insect pests can be used.

The drugs include various rethroid insecticides, carbamate insecticides, organic ricin insecticides, and the like. Specific examples of these include the following:

(hereinafter referred to as AA) manufactured by Sumitomo Chemical Shinshiki Co., Ltd.; hereinafter referred to as AB) manufactured by Gakkogyo Co., Ltd.; hereinafter referred to as AC) (hereinafter referred to as AG)) referred to as AH) (hereinafter referred to as AI) manufactured by Kogyo Co., Ltd.; hereinafter referred to as AI) manufactured by Gakkogyo Co., Ltd. (hereinafter referred to as AK)) (hereinafter referred to as AP) (hereinafter referred to as AR) 00.0-dimethyl 0-(2,2-dic00) vinyl phosphate (hereinafter referred to as As) 00,0-diethyl o-2 -iso'''jOdiruimaichi methyl-ditrisyl-(6)-thiophosphate The above insecticides include various commonly used efficacy enhancers, volatilization rate improvers, deodorants, fragrances, etc. Additives can be optionally added. Efficacy enhancers include: JipeO nylbutysuide, N-prodiluizome, MGK-264, Cynehirin 222, Cynehirin 500, Leeton 384,
IETA.

S-42I, etc., phenethyl isothiocyanate, dimethyl pymixate, etc. as a volatilization rate improver, lauric acid methacrylate (LMA), etc. as a deodorizer,
Examples of fragrances include citral, citral, and the like.

The above insecticides are prepared in solution form. As the solvent for preparing the insecticide solution, any of various organic solvents, typically hydrocarbon solvents, can be used, but in particular aliphatic hydrocarbons (paraffin hydrocarbons and unsaturated aliphatic hydrocarbons) are preferred;
Among these, n-paraffin, isoparaffin, and the like are preferred because they are practically nontoxic, odorless, and pose a very low risk of fire. Examples of organic solvents other than the above-mentioned hydrocarbons include siliserin, ethylene chloride, methanol, acetone, chloride 1 chlor ton 1 isopanol, and lyohopol.

The solvent solution of the above insecticide usually has an insecticide concentration of about 1 to 10
% by weight, preferably 3 to 8% by weight.

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 insecticide.

3.5-di-l-butyl-4-butyl-4-butyl-4-butyl-4-butylene (hereinafter referred to as CA) 3-7-butyl-4-butyl-4-butyl-4-butyl-4-butylene (hereinafter referred to as CB)
3.5-di-l-butyl-4-cyanisole (
(hereinafter referred to as CC) Mercaptobenzimidacyl (hereinafter referred to as CD) Dilauryl-thio-diprodionate (hereinafter referred to as CE) Phenol) (hereinafter referred to as CM) (hereinafter referred to as CL) (hereinafter referred to as CM) Phenyl-β-naphthylatridine (hereinafter referred to as CP)x,
s'-diphenyl-p-phenylenediamine (hereinafter referred to as CQ
2.2.4-tert-trimethyl-1,3-dishido-0-monoline polymer (hereinafter referred to as CR) α-tocopherol (hereinafter referred to as CX), ascordic acid (hereinafter referred to as CY), and erythuric acid (hereinafter referred to as CZ).

The lil of the above compounds CA and CZ may be used alone, or two or more thereof may be used in combination.

The amount used is about 0.2 to 1.0% by weight, preferably 0.3 to 0.0% by weight, in the resulting insecticidal liquid composition for liquid absorbent cores of the present invention.
The content is preferably 9% by weight.

The composition of the present invention can be applied to suction heat 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 is described, for example, in Japanese Patent Publication No. 52-12106, Japanese Utility Model Application Publication No. 58-45670, and the like. A concrete example thereof is shown in the attached drawings.

FIG. 1 is a schematic diagram of a suction type heating evaporation type insecticidal device suitable for applying the insecticidal liquid composition for liquid absorbent wicks of the present invention. an insecticide liquid storage container (3) having a body (2), a liquid-absorbing wick (1) inserted into the container with its upper part protruding, and a hollow circle that indirectly heats its upper side surface. A plate-shaped heating element (4), a support part (5) for supporting the heating element (4), and support legs (6)
The heating element (4) has a lead (not shown) for energizing it to omit heat generation.

The liquid absorbent core (1) used in the above device may be any of various commonly used materials such as felt, water vein pulp, non-woven fabric, asbestos, inorganic molded material, etc. Felt core, unglazed core, pulp core and inorganic molded cores are preferred.

Specific examples of the above-mentioned inorganic molded cores include porous porcelain, class 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, glassy volcanic rock fired powder, glassy volcanic ash fired powder and other mineral powders alone or together with wood flour, back powder, activated carbon, etc., as sizing agents such as tsu+strin, denzun, etc. gum arabic, synthetic ill
An example is one solidified with 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 back powder and/or activated carbon. 5-2 of weight
It is manufactured by blending the mixture until it reaches 5% by weight, then adding water to the mixture, kneading, extrusion molding, and drying. It is desirable that the liquid absorbing core has an oil absorption rate of 1 to 40 hours, preferably 8 to 21 hours. This oil absorption rate means that the liquid temperature is 25°C.
Diameter 7m + 1X length 70m11 in n-paraffin liquid
Soak the liquid absorbent wick up to 15ff from the bottom, and add n to the top of the wick.
- means the value claimed by measuring the time taken for the paraffin to arrive. In addition, in the liquid-absorbing core, in addition to the mineral powder, wood flour, and sizing agent, pigments such as Macalite Clean, turjic acid and its salts, and anti-mold acid such as dehydrochloric acid are added as necessary. Agents etc. can also be blended.

In addition, as the heating element used in the above-mentioned device, a heating element that generates heat by energization is commonly used, but is not limited to this, for example, a heating element using an air oxidation heating material, a platinum catalyst, etc. Any known heating element may be used.

The method of applying the composition of the present invention to the above-mentioned device to kill insects may be exactly the same as the conventional method of using this type of device. Just heat the core. The heating temperature is appropriately determined depending on the type of insecticide, etc., and is not particularly limited.
The heating element surface temperature is in the range of 50°C, preferably 135-145°C, which is about 60-13°C as the surface temperature of the liquid absorbent core.
C preferably corresponds to about 120-130°C.

In this way, the insecticide can be continuously volatilized for a long period of time at a concentration that can sufficiently kill insects.

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

Examples 1 to 64 Insecticides AA, AU, organic solvents, and compounds CA, -CZ shown in Table 1 below were added and mixed in predetermined proportions to prepare the composition of the present invention (Example A1). ~64) were obtained.

Comparative Examples 1 to 14 Example 1 except that compounds CA and -CZ were not added and mixed.
Comparative insecticidal liquid composition (Comparative Example 1-1)
4) was obtained.

Table 1 In addition, the symbols in the column of solvent in Table 1 indicate the following.

A...Aliphatic hydrocarbon with a boiling point of 150 to 180°C/760tmHy B-, a boiling point of 180 to 210"C/760rxHytDAliphatic hydrocarbon C...Boiling point of 210 to 240°C/760 mtH
/Aliphatic hydrocarbon D...boiling point 240~b Aliphatic hydrocarbon E...boiling point 270~300℃/760! In1Hf
Aliphatic hydrocarbon F...Aliphatic hydrocarbon with a boiling point of 300-350°C/760m5Hy The compositions of the present invention prepared in Examples 1 to 64 above and the comparative compositions obtained in Comparative Examples 1 to 14, respectively. 50ml was placed in the container (3) shown in Fig. 1, and the heating element (4) was energized to heat the upper side of the liquid absorbing wick (1) to a temperature of 135°C, and the heating caused the composition sample to be heated. All pesticide transpiration tests were conducted. The liquid-absorbent 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 (diameter 711M x length 70M 1 oil absorption rate approx. 1)
4 hours), and the heating element (4) was a hollow disc-shaped heating element with an inner diameter of 10 ml and a thickness of 10 m.

The amount of volatilized insecticide was determined by collecting volatilized vapor every hour by suction into a silica gel column, extracting the silica gel with 00 form, concentrating it, and quantitatively analyzing it using a gas chromatograph.

10 hours and 100 hours after starting heating of the composition sample,
The results of calculating the amount of insecticide volatilization #/k r per hour after 200 hours, 300 hours, and 400 hours are shown in Table 2 below.

[Table 2] When using the composition of the present invention, the amount of pesticide volatilization can be significantly improved, and this improved amount of volatilization hardly decreases even after 400 hours from the start of heating. It is clear that sustained expression can be achieved without causing the disease.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an example of a device suitable for applying the insecticidal composition for liquid-absorbing wicks of the present invention, in which (1) indicates a liquid-absorbing wick, (
3) represents a container containing the composition of the present invention, and (4) represents a heating element. (that's all)

Claims (1)

[Claims] ■ In an organic solvent solution of an insecticide, 3-! -Product 4-Human O Cow Shea=Sol-3,5-G-tj Chill-4-Sydron Cyanisol, Mercadztobenzimidazyl,
Dilauryl-thio-diprodionate, 2-t-butyl-4-methoxal diphenol, 3-t-butyl-4-methoxaldiphenol, 2,6-di-t-butyl-4-ethylphenol, stearyl- β-(3,5t-buty11
7-4-methylphenol), 2,2'-methylene-
Disu (6-f-butyl-Imaichi ethylphenol), 4
, 4'-methylene-his (2,6-di-t-butylphenol), 4,4'-butylidene-bis (6-t-butyl-3-methylphenol), 4,4'-thiodis (
6-tert-butyl-3-methylphenol), 1,1-bis(4-diphenyl) Schiff, l, 3
．． 5-trimethy11/-2,4,6-t-lis(3,5
- monobutyl-dibenzyl)benzene, tris(2-methyl-4-dibenzyl-5-butylphenyl)butane, tetras[methylea(3,5
-di-I-butyl-4-di-l-butyl-methane, octadecyl-3,5-di-l-butyl-
4-Doroshicinnamate, Phenyl-β-naphthylamine, N, N-=, Phenyl-phenylenediamine, 2,2,4-trimethyl-1,3-dihydro
Shinorin Polymer and 6-nitogyushi 2.2.4-t-
An insecticidal liquid composition for a liquid-absorbing core, characterized in that it contains at least one compound selected from dimethyl-1,3-dihydride.