JPS6311321B2 - - Google Patents

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to an agrochemical powder that significantly suppresses electrostatic charging to the jet tube of a sprayer during spraying. More specifically, the present invention is applicable to the application of agricultural chemical powders such as powders, DL (driftless) powders, and coarse powders (unless otherwise specified, these are collectively referred to as "agrochemical powders") using a backpack-type power spreader or the like. This is a new agricultural chemical powder that can suppress or prevent static electricity charging that occurs in direct injection pipes made of insulators such as vinyl chloride, and it contains olivine powder and serpentine as antistatic agents in the agricultural chemical active ingredient and mineral powder carrier. Stone powder type 1 or 2
The present invention relates to providing an agrochemical powder containing seeds. The purpose of the present invention is to reduce the spark discharge that occurs between the spray pipe and the pesticide sprayer when the charged potential becomes abnormally high due to the accumulation of static electricity generated in the spray pipe during spraying. The aim is to prevent the strong electric shock that sprayers receive from sprayers by making improvements to the pesticide powder itself. Among the silicate minerals, olivine and serpentine used in the present invention are widely used as raw materials for magnesia and magnesium salts because they contain particularly large amounts of magnesium oxide and iron oxide, and are also important as refractory raw materials. It is a mineral. The present invention provides a new and completely different method of using olivine and serpentine. The mechanism by which direct injection pipes are electrostatically charged when spraying pesticide powder is not clear, but it is generally believed that electric shock occurs when the absolute value of the charged potential exceeds 30KV. Therefore, when this electric shock occurs when spraying pesticide powder, the sprayer receives a strong shock to his/her body, which is always a fear for the sprayer. Although the voltage of electric shock is high, the current is small, so electric shock does not directly affect human life.
This has become a problem as it may lead to secondary disasters. In order to protect sprayers from the fear and disaster caused by such electric shocks, many researches have been made to develop new technologies to prevent static electricity during pesticide spraying. For example, a method of spraying an antistatic agent made of a special cationic surfactant (trade name "Denkyl-TS") (Report of the Agricultural Mechanization Research Institute, March 1973, research on antistatic agents for multi-mouthed hose jets); Method of using white carbon, which is used as an auxiliary agent in the preparation of pesticide powders, as an antistatic agent ["Pesticide Production Technology" No. 25 (1971) No. 9]
page], an antistatic method of adding 3% or more of calcium carbonate powder or 10% or more of calcium sulfate to an agrochemical powder containing clay as the main carrier (Japanese Patent Application Laid-open No. 129129/1983), A method for preventing static electricity by adding 5% or more of talc to a pesticide powder as a main carrier (Japanese Unexamined Patent Publication No. 129128/1983) Antistatic method by adding higher alkylaryl sulfonic acid or its salt
Various methods have been tried, such as Japanese Patent Publication No. 57501). However, even with these techniques, charging cannot be sufficiently suppressed, and depending on the antistatic agent added, there are problems such as having an adverse effect on the decomposition of agricultural chemical active ingredients. Therefore, it is desired to develop a new and effective antistatic technique to replace these conventional techniques. In view of these circumstances, the inventors of the present invention have conducted extensive research and have found that by simply blending one or both of olivine powder and serpentine powder into pesticide powder, electric shocks to applicators can be completely eliminated. The present inventors have discovered that the present invention not only allows for the use of a polyurethane resin, but also exhibits excellent effects in that it does not have any adverse effects on various active ingredients, leading to the completion of the present invention. Therefore, the agrochemical powder of the present invention has no inconveniences not only during spraying, but also during manufacturing and storage, and can be a novel and useful antistatic powder. As described later, talc, which belongs to the hydrated silicate minerals and is widely used in the formulation of agricultural chemicals, has a lower content of magnesium oxide and iron oxide in its chemical composition than olivine and serpentine, and is crystallized. The structure is also different. Although it is not clear whether this is due to these differences, talc has no antistatic effect. A more detailed explanation of the agrochemical powder of the present invention is as follows. In preparing the agrochemical powder of the present invention, no special method or equipment is required, and the powder can be prepared by adding olivine powder or serpentine powder during the manufacturing process by a commonly used manufacturing method. , DL powder,
It is sufficient to produce a coarse powder. The olivine used in the present invention corresponds to a solid solution whose end components are forsterite, which belongs to the anhydrous silicate mineral, and fayalite, which is rich in iron, and generally contains (Mg, Fe). It is a mineral represented by the chemical formula ₂ SiO ₄ . Serpentine also belongs to the hydrated silicate minerals, and generally has the chemical formula 3MgO・2SiO ₂・2H ₂ O or Mg ₆ Si ₄ O ₁₀
(OH) It is a mineral represented by ₈ . The olivine and serpentine used in the present invention have slightly different chemical composition contents depending on where they are produced. However, in the present invention, various types of olivine and serpentine having different compositions have an antistatic effect and can be used. Table 1 below shows representative examples of the chemical compositions of olivine, serpentine, and talcum similar to these used in the present invention.

[Table] In the present invention, an excellent antistatic effect can be obtained if the amount of olivine powder and serpentine powder added is 0.5% or more. Also, if necessary, in addition to the olivine powder and serpentine powder as specified above, known conventional antistatic agents can be mixed and used within the scope of the present invention. Typical examples include basic magnesium carbonate, magnesium hydroxide, magnesium oxide, aluminum oxide, titanium oxide, zinc oxide, calcium borate, nickel hydroxide, carbon black, and metal salts of stearic acid (Ca, Zn, Mg, etc.) , synthetic gypsum, calcium silicate, soybean oil, cottonseed oil, olive oil, zircon silicate, tricalcium phosphate, calcium hydrogen phosphate,
Calcium dihydrogen phosphate, lower fatty acids, lower oxyfatty acids, acetic acid, oxalic acid, boric acid, succinic acid, toluenesulfonic acid or dodecylbenzenesulfonic acid or their alkali metal salts, alkaline earth metal salts, ammonium salts, lower alkylamine salts or alkanols Examples include amine salts. The amount of the mixture of the antistatic compound of the present invention and these antistatic agents added is 0.5% (by weight) in total.
If it is above, the desired antistatic effect can be obtained. Further, the mineral powder carrier used in the present invention may be any carrier commonly used in agricultural chemical powders, such as clay, talc, bentonite, kaolin, diatomaceous earth, and the like. The particle size of these carriers is in addition to those used in normal pesticide powders, as well as so-called DL (driftless) clay or cut, which has a particle content of 10μ or less and 20% (weight) or less and an average particle size of 20μ or less. (Cut) Clay can also be used. The agricultural chemical active ingredient used in the present invention is not limited in any way, and any insecticide, fungicide, plant growth regulator, or mixture thereof that can be used in the form of a powder can be used. Examples of this are as follows. The active ingredient names of pesticides are based on the common names in "Pesticide Handbook 1981 Edition" (published by the Japan Plant Protection Association). Insecticides include CYAP, MPP, MEP, FCP,
Diazinon, Isoxathion, Pyridafenethion, Chlorpyrifos Methyl, Marathon, PAP,
Dimethoate, mecarbam, thiometone, fosalone, PMP, prothiophos, CVMP, dimethylvinphos, CVP, propafos, DEP, EPN,
Organophosphorus compounds such as CYP and EPBP, NAC,
MTMC, MIPC, BPMC, PHC, MPMC,
Various compounds include carbamate compounds such as XMC, benzoepine, pyrethrin, rotinone, kelsene, chlorbenzilate, chlorpropylate, chinomethionate, cartap, methomyl, and chlorphenamidine. In addition, disinfectants include inorganic copper agents (basic copper chloride, basic copper sulfate, basic copper phosphate sulfate, cupric hydroxide), organic copper (oxine copper), inorganic sulfur, zineb, organic sulfur nickel salt, Organic arsenic agent (MAF), TPN, fusaride, IBP, EDDP, blasticidin S, kasugamycin, polyoxin, validamycin A,
PCNB, eclomesol, triphenyltin hydroxide, captan, phenazine oxide, DPC,
Examples include various compounds such as dichlorofluanid, anilazine, thiophanate methyl, isoprothiolane, and phosdaifene. In addition, in the present invention, adjuvants such as physical property improvers and active ingredient stabilizers that are normally used when formulating agrochemical powders can be used without adversely affecting the expression of the antistatic effect of the present invention. I have no problem with that either. Examples are given below to specifically explain the present invention, but the present invention is not limited thereto. In addition, all parts in the examples mean parts by weight. Example 1 (Powder) 2.5 parts of fusaride, 0.2 parts of isopropyl acid phosphate (physical property improver), 1.0 part of white carbon, 0.5 parts of olivine powder and 95.8 parts of clay were added, and the mixture was pulverized and mixed with an atomizer to obtain a powder. Ta. Example 2 (Powder) 1.5 parts of MEP, 1.5 parts of CYP, 2.0 parts of MTMC, 0.2 parts of isopropyl acid phosphate, 1.5 parts of white carbon, 5.0 parts of serpentine powder and 88.3 parts of clay
of the powder was added and mixed by pulverization using an atomizer to obtain a powder. Example 3 (DL powder) Propaphos 1.0 parts, XMC 1.5 parts, isopropyl acid phosphate 0.2 parts, liquid parfine 1.0
1.0 parts of white carbon, 2.0 parts of olivine powder, and 93.3 parts of DL clay were added, and the mixture was ground and mixed with an atomizer to obtain a DL powder. Example 4 (DL powder) 1.5 parts of Marathon, 0.2 parts of kasugamycin hydrochloride (hereinafter simply referred to as kasugamycin), 0.4 parts of MAF,
0.2 parts of isopropyl acid phosphate, 1.0 parts of liquid parfine, 1.0 parts of white carbon, 3.0 parts of serpentine powder and 92.7 parts of DL clay were added and mixed by pulverization with an atomizer to obtain a DL powder. Example 5 (DL powder) Kasugamycin 0.1 part, fusaride 1.5 parts,
MEP2.0 parts, BPMC2.0 parts, validamycin A0.3
part, 0.2 part of isopropyl acid phosphate,
Liquid paraffin 1.0 parts, white carbon 4.0 parts,
Add 5.0 parts of olivine powder and 83.9 parts of DL clay;
A DL powder was obtained by grinding and mixing with an atomizer. Example 6 (DL powder) EPN 1.5 parts, MTMC 1.5 parts, isopropyl acid phosphate 0.2 parts, liquid paraffin 1.0 parts,
1.0 parts of white carbon, 2.0 parts of olivine powder and
Add 92.8 parts of DL clay and mix by grinding with an atomizer to obtain DL powder. Example 7 (DL powder) MEP 2.0 parts, XMC 2.0 parts, fusaride 1.5 parts, kasugamycin 0.1 parts, isopropyl acid phosphate 0.2 parts, liquid paraffin 1.0 parts, white carbon 2.0 parts, serpentine powder 2.0 parts and DL clay
Add 89.2 parts, mix with an atomizer and DL
A powder was obtained. Example 8 (Coarse powder) PAP 2.0 parts, NAC 1.5 parts, polyvinyl alcohol 1.0 parts, white carbon 1.0 parts, olivine powder
2.0 parts and 92.5 parts of clay were added, mixed and pulverized using an atomizer, then 5.0 parts of water was added and granulated using a rolling granulator, dried and sieved to obtain a coarse powder with a mesh size of 65 to 250. Example 9 (coarse powder) MEP 2.0 parts, BPMC 2.0 parts, validamycin
0.3 parts A, 1.0 parts polyvinyl alcohol, 2.0 parts white carbon, 3.0 parts serpentine powder and clay.
After adding 89.7 parts and mixing and crushing with an atomizer,
After adding 5.0 parts of water, the mixture was granulated using a rolling granulator, dried, and then sieved to obtain a coarse powder of 65 to 250 mesh. Test Example 1 Static electricity measurement was performed using the following method. (1) Measuring device A direct injection pipe (made of vinyl chloride with an outer diameter of 60 mm, wall thickness of 1 mm, and length of 423 mm) is connected to a backpack-type power spreader (Kyoritsu DM-9AE model), and the height of the spreader is adjusted.
It was placed on a 1 m wooden pedestal, and the connection between the sprayer and the direct injection pipe was fixed with a stand so that the direct injection pipe was 1 m above the ground. A current collector potential measuring device (Kasuga Denki KS-325) connected to a recorder (Kasuga Denki 401K model) to measure the charged potential at the center of the direct injection pipe.
A mold) was installed. (2) Measuring device 3 kg of pesticide powder manufactured according to Examples 1 to 9 was put into a backpack-type power spreader, the opening of the throttle lever for adjusting the engine rotation was set to 9/10, and the lever for adjusting the powder discharge amount was opened. Spraying was performed with the opening degree set to 6/10. The charged potential of the central direct injection pipe when sprayed was measured. The measured value was obtained by reading the electric potential recorded in the powder from a chart every 5 seconds and expressing the average value. On the day of measurement, the reference powder was always sprinkled and the charged potential of the sample powder was measured after confirming that there was no abnormality in the measured value of the charged potential. The results are shown in Tables 2 and 3.

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[Table] Gamycin
(0.1)

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[Table] Tables 4 and 5 show the results of testing on the stability over time of the agricultural chemical active ingredients in the agricultural chemical powder of the present invention.
As shown in the table, the addition of olivine powder or serpentine powder as an antistatic agent did not have any adverse effect on the stability of the agricultural chemical active ingredient. Test examples are shown below. Test Example 2 After filling 80 g of pesticide powder with the composition shown in Tables 4 and 5 (see below) into a 100 ml glass bottle and storing it in a thermostatic oven for 30 days (45°C), the decomposition rate of the pesticide active ingredient was determined as follows. It was calculated using the formula. The analytical values for the active ingredients were determined by the colorimetric method for MEP and MPMC, by gas chromatography for phosdaifen, and by the bioassay method for kasugamycin. Decomposition rate (%) = (analytical value of active ingredient content after 30 days at 1-45°C/analytical value of active ingredient content immediately after production) x 100 The results are shown in Tables 4 and 5.

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[Table] When examining the stability of active ingredient compounds other than those listed above, the decomposition rate of each active ingredient was extremely low. Therefore, it is considered that there is no adverse effect even if an antistatic agent is added in the present invention. For example, the degradation rate of validamycin A is 1.0-1.4%, BPMC
0.9-1.2%, marathon 8-10%, captan 1.1-2.0%, chlorpyrifos-methyl 1.0-2.0
%, and PAP is 2.5-3.2%. As described above, the pesticide powder of the present invention suppresses the decomposition rate of the active ingredient to 1/2 to 1/20th or less compared to comparative powders containing calcium carbonate (CaCO ₃ ) or calcium sulfate (CaSO ₄ ). It was found that there were no problems when used in the same way as general agricultural chemical powders.

Claims (1)

[Claims] 1. A pesticide powder, which is characterized by blending an agrochemical active ingredient and a mineral powder carrier with olivine powder or serpentine powder as an antistatic agent.