JPH0543412A - Insecticide composition for liquid-sucking wick - Google Patents

Abstract

PURPOSE:To provide an insecticide composition for liquid-sucking wick, capable of stably dissipating an insecticide without adding an agent for preventing the clogging of wick and having high safety. CONSTITUTION:The objective composition contains an ester compound of chrysanthemum-monocarboxylic acid or its derivative and 2,3,5,6- tetrafluorobenzyl alcohol expressed by formula (X and Y are Cl or CH3), especially (+)-1R,3S-trans-2,2-dimethyl-3-(2,2-dichlorovinyl) cyclopropanecarboxylic acid 2,3,5,6tetrafluorobenzyl ester as an active component at a concentration of usually 0.1-5wt.%, preferably 0.5-4wt.%. The insecticide composition for liquid-sucking wick enables the stable dissipation of the insecticide over a long period without using a clogging preventing agent and, furthermore, it is safe to accidental swallowing. The composition is suitable for an insecticide- dissipating agent or device such as fumigant, thermal dissipation agent, electric mosquito repellent and liquid-sucking electric mosquito repellent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel insecticidal composition for absorbent cores, and more specifically, a novel insecticidal composition for absorbent cores that can be suitably used when the insecticide is evaporated. It is about things.

[0002]

2. Description of the Related Art Conventionally, as a method for heating and evaporating an insecticide for the purpose of insecticidal, a smoker, a heating and evaporating agent, an electric mosquito trap, a liquid-wicking electric mosquito trap, and the like can be mentioned. Especially in recent years, the liquid-wicking electric mosquito catcher is easy to operate and can be used continuously for a long time (about 360 hours or 12 hours a day for about 30 days), and since it does not use a firearm Since it is extremely superior to conventional preparations such as no worries, it has come to be widely used. Along with this, various studies have been continued and many inventions have been made. In particular, it is possible to volatilize the insecticide (insecticidal composition) stably by preventing clogging of the absorbent core, and since the absorbent core type electric mosquito catcher has been put into practical use, Has a lot of knowledge. For example, JP-A-63-63330 discloses a method of holding a compound such as 2,2'-methylenebis (4-ethyl-6-t-butylphenol) on the absorbent core itself in order to prevent clogging. 2-25
No. 885 discloses 3,5-di-t in a composition containing an insecticide.
An insecticide composition for absorbent cores containing compounds such as -butyl-4-hydroxytoluene is shown.

On the other hand, JP-A-63-203649 discloses (+) 1R, 3S-trans-2,2-dimethyl-3.
2,3,5,6-Tetrafluorobenzyl- (2,2-dichlorovinyl) cyclopropanecarboxylate is effective as an insecticide, releasing gradually the active compound in a metered amount when formulated, the so-called Slow release formulation,
It has been proposed to add microcapsules of polymeric materials, combustors, fumigation cartridges, fumigation mosquito coils and evaporative tablets for use in electrical and chemical thermal heating devices.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
No. 203649 discloses various dosage forms and apparatus for heating and using an active ingredient, but there is no description or suggestion as to use as an insecticidal composition for absorbent cores, Furthermore, it is completely unpredictable that it can be stably used as a pesticide composition for absorbent cores for a long period of time without using an anti-clogging agent.

Therefore, the present invention has been made for the purpose of obtaining a composition which can be stably evaporated without adding a chemical agent for preventing clogging of the absorbent core and which is highly safe for the insecticide. ..

[0006]

In the present invention, when a drug represented by the general formula (1) represented by the following chemical formula 2 is used as an active ingredient of a pesticidal composition for absorbent cores, among the numerous pesticides, the above-mentioned unexpected problems occur. We have found that we can achieve the purpose.

That is, the present invention is

[0008]

[Chemical 2]

(In the formula, X and Y represent chlorine or a methyl group and may be the same or different from each other.) A pesticidal composition for absorbent cores containing as an active ingredient. Involve

The compound represented by the general formula (1) (hereinafter referred to as the compound of the present invention) is an ester compound of primary chrysanthemic acid or its derivative and 2,3,5,6-tetrafluorobenzyl alcohol. And includes any stereoisomers such as optical isomers and geometric isomers. For example, in the chrysanthemic acid derivative part of the compound of the present invention, 1R-trans, 1R
-Cis, trans, 1R-cis, 1RS-cis, trans and the like. Particularly, as the compound of the present invention,
(+) 1R, 3S-trans-2,2-dimethyl-3-
(2,2-Dichlorovinyl) cyclopropanecarboxylic acid 2,3,5,6-tetrafluorobenzyl is preferred.

The composition of the present invention may use the compound of the present invention alone or in combination with any other drug, and may include various known additives. For example, α-, which is a synergist of the compound of the present invention and a pyrethroid insecticide.
[2- (2-butoxyethoxy) ethoxy] -4,5-
Methylenedioxy-2-propyltoluene (piperonyl butoxide), N- (2-ethylhexyl) bicyclo [2,2,2 '] hept-5-ene-2,3-dicarboximide (MGK-264) , Octachlorodiisopropyl ether (S-421), isobornyl thiocyanoacetate (IBTA), N- (2-ethylhexyl) -1-
Mixing with isopropyl-4-methylbicyclo [2,2,2 '] oct-5-ene-2,3-dicarboximide (Cinepyrine 500) and other known synergists effective against allethrin and pyrethrin. Potency can be enhanced by use.

The effect can be stabilized by adding an ultraviolet absorber to the composition in order to increase the stability against light. As an ultraviolet absorber,
Examples thereof include phenol derivatives such as BTH, bisphenol derivatives, phenyl-d-naphthylamine, phenyl-β-naphthylamine, arylamines such as condensates of phenetidine and acetone, and benzophenone compounds.

As a solvent for preparing the insecticidal composition for absorbent cores of the present invention (hereinafter referred to as the present composition), various organic solvents, typically hydrocarbon solvents, can be used. Aliphatic hydrocarbons (paraffinic hydrocarbons and unsaturated aliphatic hydrocarbons) having a boiling point range of about 150 to 350 ° C. are particularly preferable, and n-paraffins having the above boiling point range include those having 10 to 18 carbon atoms. Dictionary of O
See rganic Compounds, 5th ed, 1982. Of these, n-paraffin, isoparaffin, liquid paraffin, etc. are particularly preferable in that they are practically nontoxic, have no odor, and have a very low risk of flame. Examples of the organic solvent other than the hydrocarbon include glycerin, propylene glycol, isopropanol, 1-octanol, 1-
Examples thereof include alcohols such as dodecanol, ketones such as acetophenone, ethers such as diethylene glycol dityl ether, esters such as dioctyl adipate, diethyl malonate, diethyl phthalate, xylene, chlorsene, chloroform and silicone oil.
Water can also be used if desired. The "boiling point" when the solvent is a mixture is JIS 2254-
The initial boiling point and end point described in 1990 are shown. For example,
The description of “aliphatic hydrocarbon having a boiling point of 150 to 180 ° C./760 mmHg” refers to an initial boiling point of about 150 ° C. and about 180 ° C.
The aliphatic hydrocarbon showing the distillation property at the end point of ° C is shown. Generally, the properties of petroleum products such as n-paraffin, isoparaffin, liquid paraffin, etc. are defined by the distillation property and / or the range of the number of constituent carbon atoms of the hydrocarbon compound contained in the solvent, for example, the number of carbon atoms is 10-15. ..

The concentration of the compound of the present invention in the solvent is appropriately determined depending on the insecticidal activity of the compound and the safety of the insecticidal solution. Although not particularly limited, the insecticide liquid is usually adjusted so that its concentration is 0.1 to 5% by weight, preferably 0.5 to 4% by weight, more preferably 1.0 to 3.5% by weight. Should be prepared.

The volatilization amount of the insecticide per unit time can be adjusted by appropriately adjusting the boiling point of the solvent itself or mixing the solvents having different boiling points. For example, when using a solvent having a high boiling point such as 202 ° C. such as acetophenone and using a solvent having a low boiling point such as 82.4 ° C. such as isopropanol, the volatilization amount of this composition per unit time is naturally Differently, the insecticidal effect can be enhanced by using a low boiling point solvent.

The composition of the present invention can be applied to a wicking type heat evaporation type insecticidal device utilizing various conventionally known liquid absorbent wicks, and any of them can exhibit the above-mentioned desired excellent effects. The above apparatus to which the present composition can be applied is described, for example, in Japanese Examined Patent Publication No. 52-12108 and Japanese Utility Model Laid-Open No. 58-45670. One specific example is shown in the accompanying drawings.

FIG. 1 is a schematic view of a wicking type heat evaporation type insecticidal device suitable for applying the present composition, which has the wick support 2 for supporting a liquid wick 1. An object storage container 3, a liquid absorbent core 1 inserted into the container by projecting an upper part thereof, a hollow disc heating element 4 for indirectly heating an upper side surface thereof, and supporting the heating element 4. A heating element support base 7 having a support portion 5 and support legs 6 for
The heating element 4 has a cord (not shown) for energizing the heating element 4 to generate heat.

As the liquid absorbent core 1 used in the above apparatus,
Various commonly used materials such as felt, cotton, pulp, non-woven fabric, asbestos, inorganic moldings, etc. may be used. preferable. Specific examples of the inorganic molding core, porous ceramics and glass fiber, those obtained by fixing inorganic fibers such as asbestos with a binder such as gypsum and bentonite, kaolin, activated clay, talc, diatomaceous earth, clay, perlite, Gypsum, bentonite, alumina, silica, alumina silica, titanium, vitreous volcanic rock firing powder, mineral powder such as vitreous volcanic ash firing powder alone or with wood powder, charcoal powder, activated carbon, etc., sizing agent, for example dextrin, starch, Gum arabic, synthetic glue,
An example is one that is hardened with CMC or the like. A particularly preferred liquid absorbent core is 100 parts by weight of the above mineral powder and 10 to 300 parts by weight of wood powder or a mixture of the wood powder up to an equal weight of carbon powder and / or activated carbon. 5 to 2 of weight
It is manufactured by blending to 5% by weight, further adding water to these, mixing, extruding and drying.

The absorbent core has an absorbent speed of 1 to 40 hours,
It is preferably 8 to 21 hours. The liquid absorption rate is 7 m in diameter in n-paraffin liquid at a liquid temperature of 25 ° C.
It means a value obtained by immersing a liquid-absorbent core having a length of m × 70 mm up to 15 mm from its lower part, and measuring the time until n-paraffin reaches the core top. Further, in the liquid absorbent core, in addition to the mineral powder, the wood powder and the sizing agent, if necessary, a pigment such as malachite green, sorbic acid and its salts, a fungicide such as dehydroacetic acid, etc. are blended. You can also

Another possible embodiment of the liquid absorbent core 1 is a liquid absorbent core having a structure having a porous liquid absorbent evaporation layer at the center of the liquid absorbent core and a holding material layer around the liquid absorbent core. .. As the porous liquid-absorption / evaporation layer, felt, cotton, pulp, non-woven fabric, asbestos, inorganic moldings as well as synthetic fibers such as polyester, and lumber having high water absorption are suitable as the liquid-absorption / evaporation layer. And as the surrounding holding material layer, a material selected from those having a tube-like mechanically sufficient strength and having sufficient resistance to the present composition and to heat, for example, polyester, nylon, etc. Synthetic fiber, inorganic fiber,
It is composed of plastics such as polyethylene, polypropylene and polyvinyl chloride, metals such as copper, brass, iron, stainless steel and aluminum, ceramics and glass. By attaching barium phosphate to felt, cotton, pulp, non-woven fabric, asbestos, inorganic molding, etc., the insecticide wicking performance can be stably maintained for a long time.

As the heating element used in the above-mentioned apparatus, a heating element which normally generates heat by energization is generally used, but the heating element is not limited to this, and examples thereof include petroleum benzine type body warmers, air oxidation heating materials and platinum. Any known heat generating element such as a heat generating material using a catalyst may be used.

The method of applying the present composition to the above-mentioned device to kill insects may be exactly the same as the conventional method of using this kind of device,
The composition may be heat-treated to an appropriate temperature at which the composition can evaporate from the absorbent core. The heating temperature is appropriately determined depending on the kind of insecticide and the like, but is not particularly limited. The heating element surface temperature is in the range of about 70 to 150 ° C, preferably 105 to 145 ° C.
Corresponding to 0-145 ° C, preferably about 100-143 ° C.

The above-mentioned heating and heating device using such a heating element is used in a room, a storage, a drawer, a clothes closet, a closet, a warehouse, a vehicle, a ship, an airplane, a store, a drain, a waste ditch, When installed in a relatively closed place such as in a chicken barn, it exhibits a particularly excellent insecticidal effect.

[0024]

In the present invention, the compound of the present invention represented by the general formula (I), which has been known to exhibit insecticidal activity, was applied as an insecticidal composition for absorbent cores. It is not possible to elucidate the detailed mechanism of heating and evaporating the composition extremely efficiently without using a clogging preventive agent, but the structure of the compound of the present invention and the mutual interaction between the compound, the solvent and the absorbent core It is thought to be due to the action.

[0025]

The present invention will be described in more detail below, but the present invention is not limited thereto. The solvent A in the examples has 13 to 19 carbon atoms and a boiling point of 240 to 35.
0 ° C./760 mmHg, Solvent B has 13 to 1 carbon atoms
6. A solvent having a boiling point of 240 to 275 ° C./760 mmHg was used.

Insecticide A (compound of the invention) [(+) 1
R, 3S-trans-2,2-dimethyl-3- (2,2
-Dichlorovinyl) cyclopropanecarboxylic acid 2,
3,5,6-tetrafluorobenzyl] to 1.44 (w
/ W)% so that the composition A 4 is mixed with the solvent A.
5 ml was obtained. As a comparison, the insecticide A was 1.44
The present composition B in which (w / w)% and 3,5-di-t-butyl-4-hydroxytoluene (anti-clogging agent) are mixed in the solvent A so as to be 0.3 (w / w)% Obtained 45 ml. Further, 3 insecticides dl-3-allyl-2-methylcyclopent-2-en-4-one-1-yl d-cis / trans-chrysanthemate (trade name Pinaminefonte: Sumitomo Chemical Co., Ltd.) are used. The composition B was mixed with Solvent B at a concentration of 0.6 (w / w) to prepare 45 ml of the reference composition C, and the same formulation as the composition C was further supplemented with an anti-clogging agent.
Reference composition D added and mixed at 3 (w / w)%
45 ml each was prepared.

Each composition was placed in a polyvinyl chloride container, and a liquid absorbent core (φ7 × 72.5 mm, liquid absorption speed 8 to 15 hours) was inserted to obtain each insecticidal liquid bottle. The liquid absorption core end was indirectly heated by the apparatus shown in FIG. The heating was continuously performed for about 300 hours, and the amount of volatilization was measured. This test was performed 3 times, and the average volatilization amount (mg / hour) of each composition per hour is shown in Table 1 as a result. Incidentally, the liquids of the compositions A to D remained even after the volatilization time of 298 to 322, but in the compositions, C, and D, the difference in the volatilization amount was already clearly shown at the time before this, so the measurement was performed. Was omitted.

[0028]

[Table 1]

As is clear from the results shown in Table 1, the present composition A containing the compound of the present invention and containing no anti-clogging agent
Shows that the same amount of volatilization can be maintained as in the present composition B using the compound of the present invention and using the anti-clogging agent, and thus the anti-clogging agent is not necessary in the present composition. I understand. On the other hand, the reference composition C is
It can be seen that the volatilization amount is reduced with time as compared with the reference composition D containing the clogging inhibitor because it does not contain the clogging inhibitor. That is, it was demonstrated that the compound of the present invention has excellent properties different from those of the insecticides of Reference Compositions C and D.

[0030]

INDUSTRIAL APPLICABILITY According to the present invention, the compound of the present invention represented by the general formula (I) selected from the conventionally known insecticides is used as an insecticide to form an insecticide composition for absorbent cores, which causes clogging. It is possible to provide a composition which can stably volatilize an insecticide for a long time without containing an inhibitor and is safe against accidental ingestion of the present composition.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a wicking type heat-transpiration type insecticide suitable for applying the present composition.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid absorption core 2 Core support 3 This composition storage container 4 Hollow disk heating element 5 Support part 6 Support leg 7 Heating element support stand

Claims (1)

[Claims] 1. A general formula (I) of the following chemical formula 1 (However, X and Y represent chlorine or a methyl group, and they may be the same or different from each other.) An insecticide composition for absorbent cores, which comprises as an active ingredient.