JP2002338407A - Method for fumigating fumigant insecticide - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple method for fumigating a fumigant insecticide capable of certainly beginning smoking, bringing the time to the beginning of smoking to 10-30 seconds which are most suitable to a user and a fugacity rate of the insecticide component to >=70%. SOLUTION: This method for fumigating a fumigant insecticide is to house a fuming insecticide bag which is a bag made of a synthetic resin film in which a powdery insecticidal composition consisting of 2-20 wt.% insecticidal component, 75-97 wt.% azodicarbonamide which is an organic foaming agent and one or more specifies selected from zinc oxide and zinc carbonate in 1-5 wt.% are enclosed, in a recessed part of a fumigant cylindrical body having the formed recessed part for housing the aforesaid fuming insecticide bag on the top of the cylindrical body and a substantially closed inside space in the cylindrical body, subsequently feed water to a hydro-exothermic material filled in the inside space of the aforesaid fuming cylindrical body and begin fumigating within 10-30 seconds after feeding water to bring the fumigant to attain a fugacity rate of the insecticide component in a high level of >=70%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved method of smoking a pesticide.

[0002]

2. Description of the Related Art Smoke-killers have been used to control and control pests and mites, such as cockroaches, bed bugs, lice, house dust mites, and indoor dust mites that live indoors. Smoke smoking agents correspond to high-concentration space treatment agents for a short period of time, and have the advantage of being able to process large spaces without hassle, but require sufficient considerations such as efficacy, safety against human body, and safety against fire. There are two types of smokers currently on the market, one for combustibles and oxygen-releasing substances, such as nitrates,
It contains chromate, perchlorate, etc., and burns at an appropriate speed from the ignited position, and the substance to be volatilized in the burning part volatilizes in the air. The other is prepared by adding an insecticidal component, an organic foaming agent, and, if necessary, a bulking agent (organic or inorganic substance). The insecticidal component is produced by utilizing the power of gas generated during the thermal decomposition of the organic foaming agent. Is to evaporate. On the other hand, heat generation means for starting smoking in connection with the contents of the smoking agent are also diversified, and in addition to the conventional matching ignition method, a method of generating heat by adding water to calcium oxide has also been put to practical use. However, there is a problem that it takes more than one minute to start smoking.

The present inventors have previously disclosed in Japanese Patent Application Laid-Open No. 11-9231.
In JP-A No. 2 (1993), one or two selected from a pyrethroid insecticidal component and a carbamate insecticidal component are 2-1 to 2
5% by weight, 70 to 97% by weight of azodicarbonamide as an organic foaming agent, and 1 to 15% by weight of one or two selected from zinc oxide and zinc carbonate, Disclosed are a smoke insecticide enclosed in a synthetic resin film bag in which an injection hole is formed at the contacted portion with an igniter made of a mildly combustible material, and a smoking method using the same. In Japanese Patent Application Laid-Open No. 2000-327503, a bar-shaped exothermic agent not belonging to explosives is placed in a heating agent storage tube instead of the igniter made of the mildly combustible material. A smoker igniter to which an explosive such as was attached was presented, and the ignitability was improved.

[0004] These smoking insecticides and smoking methods provide a system in which zinc oxide and zinc carbonate lower the decomposition temperature of azodicarbonamide, and can easily and efficiently smoke the insecticidal components. See, for example,
In the method disclosed in JP-A-327503, the heat generated by the igniter is insufficient to cause inconvenience of ignition, or the volatilization rate of the insecticidal component may not reach 70% depending on conditions, leaving room for improvement. .

[0005]

SUMMARY OF THE INVENTION According to the present invention, the start of smoking is simple and the start of smoking is ensured, and the time until the start of smoking is 10 to 30 seconds, which is most suitable for the user. It is an object of the present invention to provide a method for smoking a smoke insecticide which is always 70% or more.

[0006]

Means for Solving the Problems and Embodiments of the Invention In order to solve the above problems, the present inventors have conducted intensive studies and found that a powdery insecticide composition was enclosed in a synthetic resin film bag. By using the smoked insecticide bag and supplying water to the hydrothermal substance to start smoking, the present inventors have found that the desired smoking system can be achieved, and completed the present invention.

That is, the invention of claim 1 provides a synthetic resin film bag in which 2 to 20% by weight of an insecticidal component, 75 to 97% by weight of an azodicarbonamide as an organic foaming agent, zinc oxide and zinc carbonate are selected. A smoke insecticide bag containing a powdered insecticide composition containing 1 to 5% by weight of one or two of the above-mentioned smoke insecticide bags, and a concave portion for storing the smoke insecticide bag at the upper part of the cylinder. Is formed, and the inside space of the cylindrical body is substantially closed. The smoke is supplied to the concave portion of the cylindrical body, and then water is supplied to the hydrothermal substance filled in the internal space of the smoke body, thereby supplying the smoke. The present invention relates to a method of smoking a pesticide, wherein the smoke is started within 10 to 30 seconds and the volatilization rate of the pesticidal component reaches a high level of 70% or more.

Examples of the insecticidal component used in the present invention include pyrethroid insecticides, carbamate insecticides, organophosphorus insecticides, and insect growth inhibitors represented by flufenoxuron, ethoxazole and pyriproxyfen. But preferably one or two selected from pyrethroid insecticidal components and carbamate insecticidal components.
Seeds are used. Examples of the pyrethroid insecticidal component include phenothrin, permethrin, cyphenothrin, cypermethrin, alesulin, pralethrin, framethrin, resmethrin, etofenprox, etc. So
It is suitable for controlling or controlling cockroaches, bed bugs, lice, house dust mites and house dust mites that live in houses. When an optical isomer or a geometric isomer based on an asymmetric carbon or a double bond is present in the chemical structure and the like, each or an arbitrary mixture of these is naturally included in the present invention. is there. Particularly preferred compounds are
Phenothrin, permethrin, which is expected to have more residual effects,
Cyphenothrin and cypermethrin. Examples of the carbamate-based insecticide include methoxadiazone. For example, when the purpose is to control pyrethroid-resistant cockroaches, it is preferable to add this compound.

[0009] The pesticidal component is contained in the pesticidal composition in an amount of 2 to 2 parts.
0% by weight is blended. If it is less than 2% by weight, the desired effect cannot be obtained, while if it exceeds 20% by weight, the jetting power of the organic foaming agent is adversely affected.

In the present invention, in addition to the above insecticidal components, other types of acaricides, fungicides, fungicides, fungicides, antibacterial agents, fungicides, and synergists for pyrethroid insecticides. And the like. Examples of the acaricide include phenyl salicylate and 3-iodo-2-propynylbutylcarbamate, while examples of the fungicide, antibacterial and bactericide include 2-mercaptobenzothiazole and 2-mercaptobenzothiazole.
(4-thiazolyl) benzimidazole, triforine,
Examples include, but are not limited to, 3-methyl-4-isopropylphenol and o-phenylphenol.

As the organic foaming agent, azodicarbonamide is used, and is incorporated in the insecticide composition at 75 to 97% by weight. Azodicarbonamide, which mainly generates nitrogen gas by thermal decomposition, is a preferable organic foaming agent because it has a large amount of gas and exhibits excellent foaming performance, but has little odor inherent in the foaming agent. If it is less than 75% by weight, the blowing power of the blowing agent is insufficient, and the insecticidal component is not sufficiently diffused. On the other hand, when the content exceeds 97% by weight, there is a problem that other components, for example, insecticidal components are reduced and a desired insecticidal effect cannot be obtained.

In the insecticide composition used in the present invention, one or two selected from zinc oxide and zinc carbonate are used as auxiliary agents in order to lower the decomposition temperature of azodicarbonamide and increase smoking efficiency. And 1 to 5% by weight based on the total amount. If it is less than 1% by weight, the effect as an adjuvant cannot be obtained,
On the other hand, when the content exceeds 5% by weight, the jetting power increases, but the contamination due to the settling of the auxiliary agent after smoking becomes conspicuous, which is not preferable. In addition, as long as the smoke performance is not hindered, a foaming aid such as zinc stearate, zinc octoate, calcium stearate, urea, melamine, and guanidine may be further appropriately added.

The above-mentioned insecticide composition is prepared into a powdery form by further adding a stabilizer, a fragrance, an excipient and the like, if necessary, and sealed in a synthetic resin film bag. For example, granules or columns are not preferable because they not only increase the production cost but also delay the time until the start of smoking. Also, if the powder is not enclosed in a synthetic resin film bag, the time until the start of smoking becomes too fast, and the contents scatter outside the container, causing contamination. The amount of the content enclosed in the smoked insecticide bag is determined in consideration of the size of the container, the size of the room to be treated, and the like.

As the material of the synthetic resin film bag, polyethylene, polypropylene, nylon, polyester and the like can be generally used, but as a result of studying to maintain the plume efficiently, the thickness is about 20 to 50 microns. A laminate obtained by laminating polyethylene and another synthetic resin film, for example, polyethylene laminate cellophane, polyethylene laminate polypropylene, etc. was particularly effective.

The method for smoking a smoked insecticide according to the present invention is characterized in that, in addition to the above-mentioned constitution, a method of starting the smoking by supplying water to the hydrothermal substance is used as a heating means. That is, for example, in place of a smoke-type igniter in which an explosive such as a match head medicine is attached to the tip of a rod-shaped exothermic agent that does not belong to explosives, a hydrothermal reaction heating with a large exothermic energy,
Preferably, by utilizing a reaction using calcium oxide, simple and reliable start of smoking is ensured, and the time until the start of smoking is set to 10 to 30 seconds, which is most suitable for the user. Can always be 70% or more.

The smoke insecticide bag is housed in a recess formed in the upper part of the smoke cylinder. The internal space of the smoking cylinder is filled with a hydrothermal substance, and the water is supplied to heat the concave portion of the smoking cylinder and indirectly heat the smoke insecticide bag to start smoking. The hydrothermal substance may be filled so as to surround the entire peripheral surface and bottom surface of the concave portion of the smoking cylinder, or only in the bottom portion in consideration of manufacturability and economy as long as smoking performance is not hindered. Of course, the former method provides more efficient smoke performance, of course. The concave portion of the smoking cylinder may be formed as a single part by processing the smoking cylinder, or may be formed as a double structure by mounting a separately molded product. As the material of the smoking cylinder, strong and airtight properties are required, so that a metal aluminum can or a double plastic can is suitable.

According to a second aspect of the present invention, in the configuration of the first aspect, calcium oxide is used as a hydrothermal substance.

According to the smoking method of the smoke insecticide, the treatment is simple and the start of smoking is reliable, and the time until the start of smoking is 10 to 30 seconds, which is most suitable for the user.
Further, there is provided a smoking system in which the volatilization rate of the insecticidal component is always 70% or more. It has an excellent control or control effect against cockroaches, bed bugs, lice, house dust mites and house dust mites which live in the house.

[0019]

EXAMPLES Next, the method for smoking a smoke insecticide of the present invention will be described in more detail based on specific examples and test examples. FIG. 1 shows a reference sectional view of an embodiment of the present invention.

Embodiment 1 1.0 g of phenothrin (8.3% by weight based on the total amount), 0.8 g of methoxadiazone
(6.7% by weight based on the total amount), 9.84 g of azodicarbonamide (82% by weight based on the total amount), and 0.36 g of zinc oxide (3.0% by weight based on the total amount) are mixed. 12 g of the powdered insecticide composition thus obtained was sealed in a polyethylene-laminated cellophane film bag to prepare a smoked insecticide bag (1) used in the present invention. This is a metal aluminum smoke tube (2: 5.5cm in diameter, 8cm in height)
(3: diameter 4 cm, height 5 c)
m), while the interior space of the smoke cylinder (2)
Calcium oxide (4), which is a hydrothermal substance, was filled so as to surround the entire peripheral surface and bottom surface of the concave portion (3). Several water supply holes (5) are provided on the bottom surface of the smoking cylinder (2), and these components are made of aluminum in order to prevent calcium oxide (4) from absorbing and deteriorating before use. Sealed with bag (not shown). In use, first, an outer can (7) filled with a predetermined amount of water (6) was placed in the center of a closed 6 tatami room. The aluminum bag was broken, and the smoked cylinder (2) containing the smoked insecticide bag (1) was taken out and placed in the outer can (7). After 20 seconds, smoking started reliably. The smoking lasted about 4 minutes. In a subsequent investigation, the volatilization rates of phenothrin and methoxadiazone were 80% and 77%, respectively, and it was confirmed that they exhibited high control effects on cockroaches and house dust mites.

Embodiment 2 FIG. 2.4 g of permethrin (10% by weight based on the total amount), 1.2 g of 3-iodo-2-propynylbutylcarbamate (5.0% by weight based on the total amount), 19.42 g of azodicarbonamide (based on the total amount) 80.9% by weight), 0.96 g of zinc carbonate (4.0% by weight based on the total amount), and 0.02 g of fragrance (0.1% by weight based on the total amount). 24 g of the insecticide composition in the form of a capsule was sealed in a polyethylene film bag to prepare a smoked insecticide bag (1) used in the present invention. This was stored in the concave portion (3) of the smoking cylinder (2) in the same manner as in Example 1. However, the calcium oxide (4) was filled so as to heat only the bottom surface of the concave portion (3). When smoking was performed in the closed 15 tatami room in the same manner as in Example 1, smoking started after 26 seconds, and smoking continued for about 6 minutes. The plume diffused throughout the room, and the volatilization rates of permethrin and 3-iodo-2-propynylbutylcarbamate were 73% respectively.
% And 74%. In addition, as a result of examining changes in the densities of cockroaches, indoor dust mites, and molds before and after the treatment, it was recognized that all the densities were significantly reduced after the treatment.

Test Example 1 Various smoke insecticide bags (12 g) containing synthetic resin film bags shown in Table 1 according to Example 1.
Was prepared. This was housed in a smoke cylinder (diameter 5 cm, height 8 cm) according to Example 1, and the following smoke test was performed using various heating means. Table 1 also shows the test results. Start time of smoking; after the water supply if the heating means is a water heating reaction, or after ignition if a igniter for a smoking agent with a match head medicine or the like attached to the tip of a stick-shaped heating agent, after ignition. The time until the onset of smoke was measured. Volatilization rate of insecticidal components: The smoke was collected, and the amount of the insecticidal components contained therein was analyzed to determine the volatilization rate relative to the initial amount before smoking. In Table 1, "a" and "b" are the volatilization rates of the insecticidal components shown in the section on the insecticidal components. Insecticidal efficacy: A cylinder containing 10 pyrethroid-sensitive German cockroaches and 10 pyrethroid-resistant German cockroaches was placed in each of the four corners of the space.
After time, the mortality was determined. In Table 1, "feel" indicates a susceptible cockroach and "no" indicates a resistant cockroach. Comprehensive judgment: Evaluation was made in consideration of the above test items, the state of smoking, the state of contamination after treatment, and the like. A good case is indicated by 、 and a bad case is indicated by ×, and any special findings are added.

[0023]

[Table 1]

As a result of the test, according to the method for smoking a pesticide of the present invention, the treatment is simple, the start of smoking is reliable, and the time until the start of smoking is most suitable for the user.
３０30 seconds. In addition, the volatilization rate of the insecticidal component, the insecticidal efficacy, and the usability were all excellent, and it became clear that the utility was extremely high. On the other hand, as in Comparative Examples 1 to 4, the insecticide composition was columnar (diameter 5 mm, length 10 m).
When molded into m), the time until the start of smoking was delayed and the volatilization rate of the insecticidal component tended to decrease, regardless of the presence or absence of zinc oxide or the inclusion in a film bag. Also,
When the powdered insecticide composition was heated by the water-reaction reaction without being enclosed in a film bag (Comparative Example 5), the start of smoking was too early,
There is also a problem that the contents scatter outside the container and cause contamination. Furthermore, when a predetermined amount of zinc oxide is not blended even when the powdered insecticide composition is enclosed in a film bag (Comparative Examples 6 to
7) The time until the start of smoking was delayed as compared with the example, and the volatilization rate of the insecticidal component was somewhat lower. In addition, as a heating means,
When a smoke igniter in which an explosive such as a match head medicine is attached to the tip of a rod-shaped exothermic agent (Comparative Example 8), the exothermic energy is low, and the volatilization rate and the reliability of ignition are improved. There was room for From the above test results, a smoke system in which the smoking method of the present invention in which the smoke insecticide bag in which the powdered insecticide composition containing zinc oxide is sealed in a film bag is combined with water heating and heating is used. It is clear to provide.

[0025]

According to the method for smoking a smoke insecticide of the present invention, the start of smoking is simple and reliable, and the time until the start of smoking is 10 to 30 seconds, which is the most suitable for the user.
Further, there is provided a smoking system in which the volatilization rate of the insecticidal component is always 70% or more. And it shows an excellent control or control effect against cockroaches, bed bugs, lice, house dust mites and house dust mites which live in the house, and is extremely practical.

[Brief description of the drawings]

FIG. 1 shows a reference sectional view of an embodiment of the present invention.

[Explanation of symbols]

 1. Smoke insecticide bag 2. 2. Smoke-cylinder body Recess 4. 4. Heat generating substance (calcium oxide) Water supply hole 6. Water 7. Outer can

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2B121 AA16 CA07 CA16 CA21 CA61 CA67 CC02 EA01 FA15 4H011 AC02 AC04 BA01 BA06 BB10 BB13 BB15 BC06 BC18 DA02 DA11 DD05 DE06

Claims (2)

[Claims] 1. An insecticidal component is added to a synthetic resin film bag.
A powdered insecticide composition containing -20% by weight, 75-97% by weight of azodicarbonamide as an organic foaming agent, and 1-5% by weight of one or two selected from zinc oxide and zinc carbonate. The smoked insecticide bag in which is enclosed is placed in the recessed portion of the smoked cylinder in which a concave portion for storing the smoked insecticide bag is formed in the upper part of the cylindrical body and the internal space of the cylindrical body is substantially closed. By storing and then supplying water to the hydrothermal substance filled in the internal space of the smoke cylinder, the smoke is started within 10 to 30 seconds after the water is supplied, and the volatilization rate of the insecticidal component is reduced to 70%. %. A method for smoking a smoke insecticide, characterized in that it reaches a high level of at least 100%. 2. The method according to claim 1, wherein the hydrothermal substance is calcium oxide.