JPH0157081B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention provides a smoker made by packing a smoking agent containing an insecticide and an organic foaming agent into a synthetic resin film that opens only in the contact area when brought into contact with a igniter made of a slow-burning material. A method for smoking a smoked insecticide, which comprises bringing an igniter made of a slow-burning material into contact with the smoked insecticide to thermally decompose the organic foaming agent, and emitting the insecticidal component from the contact area. Regarding. There are two types of fumigants currently on the market: one contains flammable substances and oxygen-releasing substances, such as nitrates, chromates, perchlorates, etc. It is combustible,
The substances to be volatilized in the combustion part are volatilized into the air. The other type is prepared by adding an insecticidal ingredient, an organic blowing agent, and an extender (organic or inorganic) as necessary, and uses the power of the gas generated when the organic blowing agent is thermally decomposed to volatilize the insecticidal ingredient. It is something that makes you The present inventors have been researching the latter type for many years and have already applied for several patents regarding its contents and smoking method. JP 54-145217 54-145218 54-147928 54-151127 55-57505 55-64735 On the other hand, smoking methods have diversified in relation to the contents of smoking agents, A variety of methods have been developed and put into practical use, including ignition by ignition, methods that generate heat by adding water to quicklime, methods that utilize air oxidation of alkali metal sulfides, and battery-powered methods. Although these methods have the advantage of not using fire, they require packaging and containers to be strong and airtight to prevent danger and damage during inventory, and require high-quality packaging such as double-walled plastic containers or metal aluminum cans. It is forced to suffer from cost disadvantages. The present inventors have continued to conduct further intensive research on organic foaming agent-type smoking insecticides and smoking methods, and have found that they can be easily and safely achieved by simply using a light igniter based on a slow-burning material such as a stick-shaped incense stick. We developed a method for efficiently smoking insecticidal ingredients and completed the present invention. The insecticidal ingredients of the smoke insecticide used in the present invention include pyrethroid insecticides such as pyrethrin, allethrin, permethrin, phenotrin, resmethrin, flamethrin, and fuenvalerate, and organophosphorus insecticides such as diazinon, fenitrothion, DDVP, and bromofuos. There is. In addition, zinc salts of ethylene bisdithiocarbamic acid, manganese salts, dithianone, capstan, carathene, triazine, benlate, denmart, molestan,
It is also possible to add fungicides such as danicol and sulfur, plant growth regulators, and herbicides to make a multipurpose smoker. Organic blowing agents such as azodicarbonamide, 4,4'-oxybis(benzenesulfonyl hydrazide), dinitrosopentamethylenetetramine, and 2,2'-azobisisobutyronitrile can be thermally decomposed to mainly generate nitrogen gas. You can use whatever you want. Preferably, those having a decomposition temperature of 250° C. or lower, such as the above-mentioned compounds, are preferable. These can be used alone, or they can be decomposed at a low temperature by combining one with a high decomposition temperature and one with a low decomposition temperature. Furthermore, additives commonly used in these organic blowing agents, such as potassium nitrate, ammonium salts, cyanamide, urea, melamine, guanidine nitrate, or dicyandiamide, can be added to lower the decomposition temperature and suppress the generation of flames. . This smoking agent can be easily prepared by directly mixing or impregnating an insecticidal component into an organic foaming agent, and it is also possible to make it into granules by adding an excipient if necessary. A particularly useful finding of the present invention is that when the smoke agent prepared in this manner is packaged in a synthetic resin film and brought into contact with a light flammable material such as a slow-burning material, such as a stick-shaped incense stick, a hole opens only in that area. The point is that the smoke starts only from that part, and the smoke can continue efficiently from then on. This method requires only the smoking agent in a bag and a simple paper container as a container, and there is no need to use conventional double-sided plastic containers or metal cans such as aluminum or tin. do not have. Furthermore, no scattering of the contents was observed, and no difference was observed in the rate of volatilization of insecticidal ingredients compared to conventional methods. In addition, because the smoke was emitted from one part, the ejection force was strong and it was possible to smoke over a wide area. This useful smoking method was only made possible by the combination of an organic foaming agent with a decomposition point of 250°C or less and the material of the packaging bag, and is something that cannot be easily imagined based on conventional knowledge. Synthetic resin films such as polyethylene, polypropylene, nylon, and polyester can generally be used as the material for packaging bags for smoking agents, but as a result of studies to maintain the plume efficiently, we found that the thickness should be around 20 to 50 microns. Moreover, films laminated with polyethylene and other synthetic resin films, or films laminated with cellophane could also be effectively used in the present invention. In addition, the igniter based on a slow-burning material used in the present invention may include pine embers, charcoal, mosquito coils, Buddhist altar incense, etc., but for practical purposes, rod-shaped mosquito coils are preferred. . The smoke insecticide of the present invention only needs to cause partial combustion initiation temporarily, and thereafter combustion proceeds spontaneously. Therefore, the decomposition of the insecticidal component is suppressed, and the container does not require a structure that can withstand high temperatures, making it extremely inexpensive. Furthermore, the ability to smoke at low temperatures is superior in terms of safety for users as there is no risk of fire or the like. Next, examples of smoked insecticides used in the present invention will be shown. In the examples below, parts refer to parts by weight. Example 1 A powder obtained by impregnating 15 parts of permethrin with 85 parts of azodicarbonamide and mixing uniformly was filled into a 40μ polyethylene film bag to obtain a smoked insecticide. Example 2 A powder obtained by impregnating 20 parts of permethrin with 70 parts of 4,4'-oxybis(benzenesulfonyl hydrazide), 9 parts of guanidine nitrate, and 1 part of potassium nitrate and mixing uniformly was mixed with 20μ of polyethylene and cellophane (No. 300). A smoked insecticide was obtained by filling a laminated film bag. Example 3 20 parts of S-bioallethrin (S-BIOL) was impregnated into 20 parts of white carbon, which was further impregnated with 55 parts of 2,2'-azobisisobutyronitrile,
Five parts of CMC were added and mixed uniformly to obtain granules with a diameter of about 1 mm and a length of 2 to 4 mm using a conventional method, which was then filled into a laminated film bag made of 10 μm of polyethylene and 20 μm of polypropylene to obtain a smoked insecticide. Example 4 A powder obtained by impregnating 10 parts of DDVP into a mixture of 10 parts of clay and 80 parts of dinitrosopentamethylenetetramine and mixing uniformly was filled into a laminate film bag of 20 μm of polyethylene and 10 μm of polyester to obtain a smoke insecticide. Ta. Example 5 A powder obtained by uniformly mixing 10 parts of phenothrin, 15 parts of capstan, 15 parts of azodicarbonamide, and 60 parts of 4,4'-oxybis(benzenesulfonyl hydrazide) was mixed with 10 μm of polyethylene and nylon.
An insecticidal and sterilizing smoke agent was obtained by filling a 30μ laminated film bag. Example 6 20 parts of phenothrin was impregnated in a mixture of 70 parts of 4,4'-oxybis(benzenesulfonyl hydrazide), 9 parts of guanidine nitrate and 1 part of potassium nitrate, and the resulting powder was mixed uniformly into polyethylene.
20μ and cellophane (No. 300) were filled into approximately 20μ laminate film bags to obtain smoked insecticides. Comparative Experimental Example A smoking insecticide prepared with the following composition by changing the type of organic blowing agent and the material of the synthetic resin film according to Example 2 was tested using the smoking method using the slow-burning material of the present invention or the conventional method. Smoking treatment was carried out by adding water to quicklime, and the conditions of the melt pores and ejection force of the film were observed as follows.

[Table] ** Similar results were obtained when a flammable sulfur-based disinfectant was added in place of potassium perchlorate.
As a result of the test, as shown in the comparative example, the decomposition temperature was
Ignition failures are often observed when an organic blowing agent with a temperature higher than 250°C is used (Comparative Example 1) or when a material other than polyethylene is used for the laminate film (Comparative Example 2). When a combustible component was blended (Comparative Example 3), the melt pores expanded quickly and the smoke ejection force immediately decreased. Furthermore, when the conventional smoking method of adding water to quicklime was applied (Comparative Example 4), the reaction was so rapid that the entire bag burst and the contents were scattered, which was unsuitable. Therefore, it has become clear that a smoking treatment with excellent smoking efficiency can be obtained only when the three elements of an appropriate organic blowing agent, the material of the synthetic resin film, and the smoking method are all in place. Next, the test results of the smoking insecticide of the present invention according to the smoking method will be shown. Test results 1 The smoked insecticides of Examples 1, 2, 3, 4, and 6 were smoked in a 6-tatami model room using mosquito coils according to the smoking method of the present invention, and their effective volatilization was confirmed. The insecticidal effect on adult German cockroach was tested. In addition, a control test was conducted using a commercially available smoke agent (containing 5% peremethrin) using a conventional smoking method.

[Table] The amount of active ingredients used in the above smoked insecticides is 1.5g per 6 tatami mats. It can be seen that the method of smoking the smoked insecticide according to the present invention has a higher insecticidal effect than commercially available products. Test Results 2 10 g of the smoked insecticide of Example 2 was placed in a paper cup lined with aluminum foil, and 4 containers were smoked using mosquito coils and the smoking method of the present invention in a dining room of approximately 40 m ² . I conducted a test. The survey used sticky traps, and the effectiveness was judged by the number of cockroaches caught per trap per day before and after smoking. The results are shown in the graph below. Before treatment, about 11 German cockroaches (including a small number of black cockroaches) were captured per trap per day, but after two months after treatment, less than one per trap per day was captured, showing a very high effect.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one example of implementing the present invention. 1 is a paper cup container (preferably one lined with aluminum foil), 2 is a lid with holes, 3 is the smoking insecticide of the present invention, 4 is a weight to stabilize the center of gravity, 5
is a rod-shaped mosquito coil used as a lighting device.

Claims (1)

[Claims] 1. A smoking agent that contains an insecticide and an organic foaming agent with a decomposition temperature of 250°C or less, in a polyethylene laminate synthetic resin film that forms holes only in the area where it comes in contact with a igniter made of a slow-flammable material. A smoky insecticide obtained by packing the smoky insecticide in a bag is brought into contact with an igniter made of a slow-burning material to thermally decompose the organic foaming agent and emit insecticidal ingredients from the contact area. How to smoke insecticides.