KR810000969B1 - Fumigating method - Google Patents

Abstract

Fumigation method is designed to exterminate harmful insects. These fumigant insecticides are prepd. by mixing a volatile insecticides and an org. foam agent. Org. foaming agent are pyrolyzed, insecticide by pyrolysis gas are effectively fumigated without heat. Thus, a mixt. of 0.5g chryslon forte and 1.5 g dinitrosopentamethylenetetramine in a container was indirectly heated at 300oC. The volatilization was 77.3 % and 0.6 % for the product and control, resp.

Description

Pest Control Methods

The present invention is a method for extinguishing pests by fumigation of pesticides. More particularly, the present invention relates to a method of controlling fumigating insecticides in a short time and intensively to control hygiene pests in rooms and other limited spaces such as mosquitoes, flies and cockroaches.

Conventionally, as a method of controlling pests by fumigation of pesticides in a short time, a method of using a so-called smoker that mixes the drug with a combustion agent and emits the drug by the heat and combustion of the combustion agent is common. Has In other words, in order to rapidly increase a large amount of pesticides, the combustion of a combustion agent that generates highly toxic fumes is essential, and therefore, irritating odor caused by the fuming of this smoke agent. Or risks to the human body or fire hazards. More importantly, according to the smoke agent, the thermal decomposition of the pesticide drug by the heat of combustion, the lowering of the effective volatilization rate, that is, the lowering of the insecticidal efficiency and economic loss are inevitable.

The present invention, unlike the pest control method using the known smoke agent, it is possible to increase a large amount of pesticide drug in an instant and effectively, over a wide range, and also substantially accompanied smoke fumes It is therefore intended to provide a new pest control method without causing problems such as toxic or irritating odor and thus no risk of fire.

In other words, the present invention confronts a pesticide by exterminating pesticides, and mixes the pesticides with an organic foaming agent, heats the mixture indirectly, and thermally decomposes the organic foaming agent without entailing combustion. It relates to a pest control method characterized by effectively fumigation of the pesticide drug.

In this invention, all the various chemical agents used conventionally as a pest control agent can be used as an insecticide. As a typical chemical agent, the following can be illustrated.

Various additives, such as a potentiator, a volatilization rate improver, a deodorant, a fragrance, etc. which are normally used, can be added to the said pesticide agent in this invention arbitrarily. As a potentiating agent, piperonyl butoxide, N-propylisozom, MGK-264, cynepirine 222, cyinepyrin 500, lysene 384, IBTA, S-421, etc. Nate, dimethyl hydroxy acid, etc., lauryl acid methacrylate (LMA) etc. as a deodorant, citraul, citronella, etc. can be illustrated as a fragrance, respectively.

In the present invention, as the organic foaming agent used in combination with the pesticide drug and various additives added as needed, all kinds of conventional organic foaming agents which are mainly pyrolyzed to generate nitrogen gas may be used. Preferably, the foaming temperature is 300 ° C. or lower. It is good to have. Representative organic foaming agents are illustrated in Table 1 below.

TABLE 1

The organic foaming agent is usually added thereto, for example, "Dyphos" (manufactured by National Reed), "Tribase" (manufactured by National Reed), "OF-14" (manufactured by Adeka Gas), and "OF-15". (Ateca Gas Co., Ltd.), KV-68 A-1 (Kyodo Pharmaceutical Co., Ltd.), "Mark-553" (Adeca Gas Co., Ltd.), "Sicostab 60" and "Sicostab 61" G, Sieqle Co) company) and Cd-stearate, Ca-stearate, Zn-stearate, Zn-octet, ZnO, Sn-maleate, ZnCo ₃ , urine, chrome yellow, carbon black, etc. It is possible to reduce the foaming temperature by using an additive of.

In the present invention, the mixing ratio of the blowing agent to the pesticide may be appropriately selected depending on the desired insecticidal effect of the resulting extinguishing agent, but the blowing agent may be about 2/1 weight or more based on the conventional pesticide. With the increase in the mixing ratio of the blowing agent, the effective volatilization rate of the insecticide is gradually improved, but the effect is not improved even if it is too large. The blowing agent is preferably about 2/1 to 30 wt. Times, preferably about 1 to 20 wt. In addition, the mixed form of the pesticide and the blowing agent is not particularly limited, but considering the workability and the ease of preparation and use of the resulting remedy, the granules, blocks, pellets, pastes and the like may be used. It is preferable to mix and seal a heat-melt resin bag etc., and various binders, solvents, etc. can be used according to each of these usage forms.

In the present invention, a mixture of various types of pesticides and blowing agents and, if necessary, suitable additives are mixed indirectly to thermally decompose the blowing agent in the mixture without burning the mixture. In the above, as the heat source, various kinds of materials capable of providing a temperature at which the blowing agent in the mixture can be foamed without burning the mixture by indirectly heating the mixture can be used. Specifically, the following heat sources can be used advantageously.

1) Compound that generates heat by hydrolysis

For example, a substance exothermic may be exemplified only by adding magnesium chloride, aluminum chloride, calcium chloride, iron chloride, and the like.

2) Electrical heat source that generates heat by applying electricity

For example, heating wires, such as a nichrome wire, a sheet heater, the heater using a semiconductor, etc. can be illustrated.

3) Combination of metals or metal compounds and preparations that generate heat by oxidation reaction.

For example, a method of mixing iron with an oxidizing agent (ammonium chloride), etc. A method of mixing a metal with a metal oxide or an oxidizing agent having less ionization tendency than this metal, iron and potassium sulfate, iron sulfide, metal chloride, and iron sulfate A method of contacting a mixture of at least one of the above with water and oxygen, a method of contacting water with a mixture of a metal having a higher ionization tendency than iron and a halide of a metal having a lower ionization tendency than iron, and a metal and bisulfate salt The method of contacting the mixture with water, the method of adding water to the mixture of aluminum and an alkali metal acetate, etc. can be illustrated.

4) by oxidation of metal sulfides.

For example, a method of contacting oxygen with a mixture of sodium sulfide and iron carbide may be exemplified.

In the present invention, the various heat sources are energized, mixed or contacted with water and / or air to generate heat, and the heat amount is used to indirectly heat the mixture of the pesticide and the blowing agent. Indirect heating is carried out, for example, by containing a mixture containing the pesticide and the blowing agent in a suitable container and placing a heat source outside the container. More preferably, in order to effectively use the heat amount of the heat source, the heat source is accommodated in a closed outer container, and the inner container containing the mixture containing the pesticide and the blowing agent in the outer wall thereof. And it is good to accommodate at least 1 part of a side wall as a partition. By indirect heating of the mixture by exothermic heat of the heat source, the mixture is heated without causing any complex combustion, and the blowing agent in the mixture undergoes pyrolysis reaction. In the present invention, by the pyrolysis reaction generating gas of the foaming agent of this method, the pesticide in the mixture is forcibly dissipated, and the volatilization thereof is promoted. It evaporates rapidly and effectively in a short time.

Therefore, according to the method of the present invention, hygiene pests such as mosquitoes, flies, fleas, bedbugs and rat flea cockroaches inhabiting a room or other limited space can be extremely effectively controlled. Furthermore, the present invention does not use combustion of a combustion agent as in the conventional method, and does not substantially involve the generation of irritating odors, smoke, or fire, and has the advantage of being safe and easy to carry out.

Hereinafter, examples will be given to further illustrate the present invention. In addition, the effective volatilization rate of the pesticide drug in the embodiment is to fumigation the pesticide drug in a sealed container, to pass the air in the container through the benzene to collect the drug in the air in the benzene, and concentrated Measured by gas chromatography and expressed as a percentage of the initial pesticide weight.

Example 1

In a suitable cylindrical container, each of the pesticides and the blowing agent described in Table 2 is mixed and stored, the container is externally heated by a heating wire (up to a maximum temperature of 300 ° C), and the blowing agent in the container is thermally decomposed to prepare the pesticide. Volatilize. The result of having measured the effective volatilization rate of the insecticide at that time is as showing in the following 2nd table | surface.

TABLE 2

Comparative Example 1

Except for not using a blowing agent in Example 1, the pesticide agent is volatilized in the same manner. The results are shown in Table 3 below.

TABLE 3

As is clear from the comparison between the second table and the third table, according to the method of the present invention, when the same amount of drug is heated to the same temperature by mixing a blowing agent with an insecticide, it is effectively volatilized 10 to 10 times more effectively. You can see that you can.

Claims (1)

In controlling pests by fumigation of pesticides, the pesticides are mixed with an organic foaming agent, the mixture is indirectly heated to thermally decompose the organic foaming agent without combusting, and the action of the pyrolysis gas effectively makes the pesticides effective. Pest control method characterized in that the fumigation.