KR100296781B1 - Sleep floating oily pesticide solids - Google Patents

Abstract

The present invention aims to provide an agrochemical solid agent which can be easily treated, does not harm the spores or the environment, and is free from harmful and insufficient effects, and the present invention contains a pulverized blowing agent, 0.1 to 10 g, having a water suspension rate of 80% or more after being added to water for 5 minutes, and comprising an expandable agrochemical solid agent which easily disperses the active ingredient in water in suspension on the water surface; It can be easily thrown from the back, there is an effect that can be processed very simply and easily pesticides.

Description

Sleep floating pesticide solids

1 is the amount of foam measurement device

Second degree rice field plot

An object of the present invention is to provide a pesticide solid agent that can be easily treated, does not harm the spores or the environment, and is free from weakness and lack of efficacy.

The present invention is a foaming pesticide solid agent which is suspended in the surface of the rice paddy immediately after entering into the paddy field, diffused on the surface of the water, and easily disperses or dissolves the solid agent in water (hereinafter, water-soluble sheet) Pesticides in the form of cheap

Until now, rice paddies have been used in various formulations, for example, powders, wetting agents, emulsions, granules, and the like, for the convenience of their use, and have been used in the form of water or rice.

However, powders and hydrating powders have problems of health and environmental pollution of users and producers due to flying powder, and oils have a problem of toxicity of organic solvents and a risk of fire. Although these problems are small in granulation, they are not only disadvantageous in terms of the flow and economical efficiency of the object, but are also difficult to dissolve because the active ingredients are once dissolved in water and absorbed by plants in the roots or stems to express effects as rain. In the case of a compound, a compound which is easily adsorbed to the soil, or a compound having a property of not having a permeability to transfer, sufficient control activity is often not obtained in comparison with other formulations.

This has led to the development of new formulations called floors (weak FL) and dry flables (weak DF). These FL and DF are diluted with water and used as an aqueous solution, a suspension or an emulsion, and can be said to be a formulation which solved the above-mentioned problem of the hydrating agent in that they are fluid and not powdery.

However, in the conventional formulations as well as FL and DF, in order to disperse these preparations, it is necessary to first prepare a dispersion by dissolving or dispersing the preparation in water, and when dispersing the dispersion. In many cases it is necessary to use a spreading mechanism. In addition, in order to spread the active ingredient evenly throughout the paddy field, it is necessary for the spreader to enter the paddy field. In this way, preparing containers and dispensing mechanisms for dispersing liquids and distributing them in rice fields is not only economically unstable and unstable in terms of safety, but also burdens of time and effort, especially small-sized farmers, elderly people and women. Such a burden is difficult to endure for the recent farmhouse with much dependence.

For this reason, the method which put FL of the herbicide into the plastic bottle and sprinkled it into the rice paddies from the small hole which opened the cap part in recent years was developed. According to this method, there is an advantage in that it can be easily spread without requiring a special mechanism for spreading. However, the dispersion requires effort because the spreader needs to enter the paddy field, and according to the spreading method and the direction of the spray, there is a drawback of splashing of the liquid to the worker, which is a health problem. It is hard to say that it could be solved. Furthermore, there is a new problem that the disposal of used empty bottles (prabottles) may cause safety and environmental problems.

Until now, as water-suspended granules, (1) floating by using a water-suspendable carrier (JP-A-48-15613, 47-1240), (2) pumice and vermiculite having a specific absorption capacity as a carrier. (Publication No. 44-8600), (3) Granulation using volatilizing insecticide compounds (Publication No. 49-11421), (4) Carbamate-based pesticide active ingredients and their distribution coefficients for water (10) A composition comprising an organic compound of at least 10 ² in a solid carrier (see Japanese Patent Application Laid-Open No. 2-174702), (5) A composition comprising a solid carrier, a fungicide, a herbicide or an effective plant growth regulating agent, and oil (Japanese Patent Application Laid-Open No. 3-193705). Japanese Patent Application Publication). However, these were no different from the conventional granules in terms of the scattering method and could not be reduced in scattering effort.

In addition, recently applied to a non-herbicidal herbicide (Patent No. 3-128301) or a tablet or capsule for a non-herb weed containing an active ingredient, a surfactant, and a binder (Patent No. 3-173802). A technique has been disclosed. These techniques have the advantage that the treatment of the non-herbicide is possible simply. However, when these solid preparations are thrown into water, the preparations settle on the soil surface, and foamed here, so that the active ingredient is dispersed in the surface water, so that the undissolved original particles settle around the dropping point and are dissolved. The active ingredient also forms a high concentration of solution near the soil surface near the point of release. Therefore, even if the active ingredient is easily adsorbed to the soil and has an extremely high water solubility, the concentration increases near the point of dropping, and the inefficiency of weakness and lack of effectiveness due to the non-uniformity of the active ingredient depends on the location conditions and the weather conditions. There is a drawback that this is likely to occur.

As above,

① No special mechanism is needed for spreading

② Disposal is possible without entering the paddy field

③ Safety for Spores and Environment

④ The disposal of the container containing pesticide preparation is easy

⑤There is no fear of lack of efficacy or weakness due to ubiquity of active ingredient

There has been a desire for a way to satisfy this problem.

In view of such a phenomenon, the present inventors earnestly examined for the purpose of developing a formulation and a treatment method that satisfy the above conditions.

As a result, the preparation form is a solid such as tablets and briquettes, and if necessary, the solid is wrapped in a water-soluble sheet to satisfy the conditions of ①②③④ above. Floating, spreading and floating the surface of water, then disintegrating and dispersing it in water, satisfies the condition (5) above, that is, local ubiquitous local active ingredient can be prevented, and weakness and poor biological effects The inventors have found that there is much less concern, and, in the formulation of the above-mentioned solid agents, have found that the weight and hardness of the solid agent and the properties of the foaming agent are important, thus completing the present invention.

The present invention contains a crushed blowing agent, one weight is 0.1 to 10g, the water floating rate is 80% or more for 5 minutes after being added to water, foaming pesticides that easily disperse the active ingredient in water during floating on the water surface Brother, preferably, the above-mentioned expandable pesticide solid agent having a foaming amount of at least 50 ml per 2 g after 5 minutes in water, more preferably 15 to 60% citric acid and 15 to 60% sodium bicarbonate as the foaming component. It is a pesticide preparation of the form wrapped in the sheet | seat which disperse | distributes easily or disperse | distributes the said foamable pesticide solid agent and these pesticide solid agents, characterized in that it is 20-70% of all carbonate salts.

The solid agent of the present invention, after entering the paddy field, floats without settling or floats on the surface within a short time even if it is once settled, while floating and spreading the surface of the water while partially disintegrating and dispersing, the active ingredient is dispersed or dispersed in water. It dissolves and has the property of diffusing throughout the paddy field in a short time.

The pesticide active ingredient which can be used in the present invention is not particularly limited as long as it is used in rice fields as pesticides such as insecticides, fungicides, herbicides and plant growth regulators.

When the active ingredients are insecticides and fungicides, it is preferable that they have the property of being absorbed and transferred to rice plants, but they are effective for insects that reproduce in water or on water or bacteria that infect water and water even if they do not penetrate. In any case, a compound with little weakness is preferable. In the case of herbicides, it is preferable to select a compound which is particularly harmless in view of its original properties and time of use.

The active ingredient may be water-soluble, poorly soluble in water, solid, or liquid. Generally, a solid compound is suitable for the present invention. However, even in the case of a liquid element, if solidified while being dissolved in a suitable solvent and an emulsifier and then absorbed in a suitable carrier, it can be sufficiently applied to the present invention. . The carrier used at this time is not particularly limited as long as it is generally used as a carrier of pesticide, but is preferably mineral fine powder such as bentonite, talc, clay, diatomaceous earth, amorphous silicon oxide, calcium carbonate, calcium silicate, crystalline cellulose, starch And powdered organic substances such as sugars such as dextrin, glucose, sugar, lactose and wood flour.

Preferred insecticides include isooxathione, propaphos, DEP, diazinone, ethylthiomethone, hormone mothone, dimethoate, monochromophosphate, acetate, carbosulphan, thiosiqram, cartaf, benprakar Underwater or near water, such as permeable insecticides such as bromo, prathiocarb, carbaryl, vpropezin, BPMC, PHC imidaclobrid, TI304, weeping weevils such as cycloprotrin, etofenblocks and rice mud worms Synthetic pyrethroids etc. which are effective for the pest which reproduces in the above are mentioned.

Preferable fungicides include blasting agents such as probenazole, isoprothiorane, IBP, tricyclazole, pyroquiron, prunil, mepronyl, dry mouth agents such as MON 240, S658, techrophthala and the like. Can be.

Preferred herbicides include pyrazolate, benzophenaf, pyrazoxifene, pyributycarb, bromobutide, mefenacet, benzpronmethyl, butacrol, pretilacrol, benthiocarb, CNP, and chromame Toxylyl, dimelone, biphenox, naproanilide, oxadione, betazone, mollinate, piperophos, dimethifilate, esprocarb, dithiophyll, imazosulphron, benpresate, ACN , Cetlin, MCPB, king chlorac, pyrazosulproethyl, KPP314, N- [2- (3-methoxy) thienylmethyl] -N-chloroacet-2,6-dimethylanilide (NSK 850), Non herbicides, such as 1- (2-chlorobenzyl) -3-((alpha), (alpha)-dimethylbenzyl) urea (JC 940), are mentioned.

Preferred plant growth regulators include inaben feed, paclobutrazole, uniconazole, triaptenenol and the like.

After the preparation itself disintegrates and disperse | distributes these active ingredients, it is necessary to melt | dissolve or suspend and spread it in surface water as soon as possible, and to exhibit effect. Therefore, fine grinding is necessary for the active ingredient having low solubility in water. In the case where the active ingredient is a solid, for example, even if the water solubility is high, it is better to prepare it as a solid after pulverizing to some extent. For this reason, it is preferable to perform dry grinding by a hammer mill, a jet mill, etc., and wet grinding by a sand mill, an atomizer, etc.

However, when wet grinding is performed, there is a drawback that it cannot be applied to the molding machine described later, which is used when finally molding into a solid agent. That is, since the solid agent of this invention mix | blends the foaming agent which foams water in presence, it should dry before mixing a foaming agent. Drying may dry the wet-pulverized slurry as it is using a spray dryer, etc., However, it may mix beforehand with one part or all of another preparation, and if necessary, may dry after granulating. The obtained dry powder or particle | grain is shape | molded with a solid agent using the molding machine mentioned later similarly to a dry grinding product.

The water solubility of the active ingredient is influenced by whether or not the solid agent is easily floated and expanded, and in general, it is easy to rise that the active ingredient is a poorly water-soluble compound in water.

In the solid preparation of the present invention, a foaming agent is blended as an essential adjuvant, and other ingredients such as expansion agents, water repellents, disintegrating dispersants, wetting agents, extenders, binders, lubricants, particle growth inhibitors, and stabilizers are formulated as necessary. do.

If the solid agent of the present invention is settled in water for a long time after the input, the active ingredient may dissolve in between, or the solid agent may disintegrate and disperse, causing the active ingredient to settle around the dropping point. As a result, the effective component concentration of the soil surface around the dropping point becomes high, and the weakness around the dropping point and the lack of the effect away from the dropping point occur, and therefore, the object of the present invention cannot be achieved. Therefore, the solid agent needs to rise to the surface in the shortest possible time. If possible, it is preferable that all the injected water floats on the surface of the rice paddy and is expanded within about 5 minutes after being put into the paddy field. However, in order to achieve the effect of the present invention, it is more preferable that the water floating rate by the method described below is 80% or more. .

In addition to the water solubility of the active ingredient described above, whether or not the solid agent is easily floated and expanded may include the types of solid acids and carbonates as foaming agents, their blending ratios and blending amounts, the presence or absence of grinding agents, repellents, water repellents, dispersants, lubricants and other It depends on various factors such as the type of preparation and the amount of the preparation.

In particular, the blowing agent, expansion agent, and water repellent agent are important in that the solid agent floats on the surface of the water, floats, and expands as widely as possible on the surface of the water.

Examples of the blowing agent used in the present invention include salts that generate carbon dioxide by reacting with acids such as carbonates, hydrogencarbonates, sesquicarbonates (hereinafter collectively referred to as [carbonate] unless otherwise indicated), and water-soluble solid acids. What mixed in the solid state is used. Examples of the carbonate include sodium carbonate, magnesium carbonate, potassium carbonate, carbonates such as calcium carbonate, sodium bicarbonate, hydrogen carbonates such as potassium bicarbonate, sesquicarbonate, sesquicarbonates such as potassium sesquicarbonate, and the like. have. Examples of the water-soluble concrete acid include inorganic solid acids such as citric acid, tartaric acid, oxalic acid, malic acid, maleic acid, succinic acid and fumaric acid.

It is preferable that the blowing agent reacts and foams rapidly in water, since a solid blowing agent having a high foaming power tends to float. For this reason, as a solid acid, a thing which is easy to melt | dissolve in water rather than succinic acid, a fumaric acid, a boric acid, for example, citric acid, tartaric acid, oxalic acid, malic acid, maleic acid, etc. is preferable. However, tartaric acid is expensive, and oxalic acid is toxic. Malic acid and maleic acid have high hygroscopicity and lack of stability over time, and when produced under high humidity, in particular, they are attached to balls of tableting machines or diamonds of briquetting machines, and have difficulty in continuous productivity. Thus, citric acid is most preferred. On the other hand, as carbonates, carbonates such as sodium carbonate, calcium carbonate, potassium carbonate, and magnesium carbonate are relatively low in reactivity and are difficult to float, and hydrogen carbonates such as sodium bicarbonate and potassium bicarbonate, and sesquicarbonate, sesquicarbonate Easy to injure Therefore, it is preferable that the compound mainly contains hydrogen carbonate or sesquicarbonate, preferably hydrogen carbonate.

Solid acids and carbonates, which are the blowing agent components, are usually supplied commercially as granular crystals having an average diameter of several hundred mu m. In conventional foaming agents, such as bathing agents and confectionary medicines, in view of the storage stability of the product, a preparation method of solidifying the granular foaming agent has been adopted without crushing the foaming agent component having passed through the particle size. However, since the pesticide solid agent of the present invention needs to be floated on the surface of the water quickly after being added to water, and it is difficult to float when the passed blowing agent component is used, it is necessary to crush and use the blowing agent component. By pulverizing the blowing agent component, the foaming force becomes stronger, and the solid agent becomes more susceptible to floating in water.

The grinding method of the blowing agent is a method of grinding only carbonates and solid acids separately, a method of grinding and mixing the carbonates and solid acids, a mixture of all or part of the active ingredient and other preparations and the carbonates and solid acids and then grinding None of the ways are good. As a grinder, a conventional dry grinder, such as a hammer mill, a pin mill, an air mill, can be used. The particle size of the foaming agent after pulverization is at least 105 µm or less, preferably 74 µm or less, more preferably 63 µm or less.

It is preferable that the compounding ratio of the solid acid and the carbonate increases the amount of the solid acid rather than the equivalent to be neutralized to increase the foaming force.

On the other hand, when a large amount of water-soluble solid acid and hydrogen carbonate are blended or pulverized, it is difficult to maintain stability of the formulation over time. Therefore, it is necessary to find a proper contact point in balance between foaming power and stability over time. In this regard, carbonates, in particular sodium carbonate, are hydrated and stabilized, and may act as an absorbent for preventing foaming by water. Therefore, a mixed use mainly comprising hydrogen carbonate is blended.

As mentioned above, the most preferable foaming agent also in terms of floating, floating property, economical efficiency, stability with light stability, is citric acid as a solid acid 15 to 60% of the total solid, sodium bicarbonate 15% or more, preferably 20 ~ 60% and other hydrogen carbonates, sesquicarbonates and carbonates are added as necessary, and the total amount of these carbonates combined is 20% or more, preferably 25 to 70%, pulverized and blended. With this foaming agent, almost all of them rise to the surface within 5 minutes even with a fairly solid solid with a hardness of about 10 kgh.

Examples of the expanding agent used include polymer surfactants of polycarboxylic acid and polysulfonic acid type, sodium lauryl sulfate, perfluoroalkyl carboxylate, polyoxyethylene alkylaryl ether, polyoxyethylene aryl ether, and polyoxyethylene Alkyl ethers, polyoxyethylene alkyl esters, alkyl esters of sorbitan, acetylene alcohol, acetylene diol and various surfactants such as surfactants, silicone surfactants and fluorine-based surfactants added with alkylene oxides, paraffin oil, silicone Ducks such as oils, resins such as pineapples, camphor, naphthalene, and the like. Preferably, acetylene alcohol, acetylene diol, surfactants in which alkylene oxide is added thereto, silicone surfactants, fluorine-based surfactants, polyoxy, etc. Polyoxyethylene aryl ether type system, such as ethylene tristyryl phenyl ether An active agent.

Examples of the water repellent used include fatty acid salts such as magnesium stearate, calcium stearate and sodium oleate, higher alcohols such as stearyl alcohol, higher fatty acids such as stearic acid, silicone oils and derivatives thereof, fluorine-based surfactants, cationic surfactants, Hydrophobic silica etc. are mentioned. Among them, hydrophobic silica is particularly useful because the solid agent can be made water repellent by a small amount of the compound.

The disintegrating dispersant and the wetting agent are important in that the suspended solids do not drop the active ingredient at any time and are easily disintegrated and dispersed by soaking the active ingredient in water.

In particular, when the active ingredient is a compound that is poorly water-soluble in water, after the solid agent collapses on the surface, the active ingredient particles do not disperse in the water, but float on the surface for a long time and are called by the wind, whereby the ubiquitous acceleration of the active ingredient may occur. . In order to avoid this, it is preferable to mix | blend a suitable disintegrating dispersing agent and a wetting agent, and to suspend an active ingredient in water.

Examples of disintegrating dispersants used include lignin sulfonates, (alkyl) naphthalene sulfonates and their condensates, phenol sulfonates and their condensates, condensates of styrene sulfonates, salts of condensates of maleic acid and styrene sulfonic acids, and acrylic acid. , Salts of carboxylic acid condensates such as maleic acid, alkylbenzene sulfonates, dialkyl sulfosuccinates, salts of polyoxyethylene alkyl ether sulfates, salts of polyoxyethylene alkyl aryl ether sulfates, polyoxyethylene alkyl ether phosphoric acid Anionic surfactants, such as an ester salt and a polyoxyethylene alkyl aryl ether phosphate ester salt, are mentioned, Preferably, lignin sulfonate, (alkyl) naphthalene sulfonate and its condensate, phenol sulfonate and its condensate, Condensates of styrene sulfonates, salts of condensates of maleic acid and styrenesulfonic acids, and salts of carboxylic acid condensates.

Examples of the wetting agent include condensates of alkylnaphthalene sulfonates, alkylbenzene sulfonates, dialkyl sulfosuccinates, salts of polyoxyethylene alkyl ether sulfates, salts of polyoxyethyl alkylaryl ether sulfates, and polyoxyethylene alkyl ether phosphate ester salts. And anionic surfactants such as polyoxyethylene alkylaryl ether phosphate ester salts and nonionic surfactants such as polyoxyethylene alkyl ethers, polyoxyethylene alkylaryl ethers, polyoxyethylene alkyl esters, and preferably alkyl And condensates of naphthalene sulfonates and alkylbenzene sulfonates.

Many disintegrating dispersants and wetting agents can be used interchangeably.

The disintegrating dispersant and the wetting agent are not limited to these, and may be used as long as they are suitable even if they are nonionic, cationic or zwitterionic. In addition, it is also useful as a disintegrating dispersant that has the property of absorbing and swelling water such as starch, carboxymethyl cellulose and its salt, carboxymethylated starch and its salt, crosslinked product of polyvinyl phytolidone, crystalline cellulose, superabsorbent resin, and the like. .

Extenders used include bentonite, talc, clay, diatomaceous earth, amorphous silicon dioxide, talsium carbonate, magnesium carbonate, and other mineral fine powders commonly used as carriers of pesticides, sugars such as glucose, sugar, lactose, carboxymethyl cellulose and the like. Salts, starches and derivatives thereof, organic substances such as crystalline cellulose and wood flour, water-soluble inorganic salts such as sodium sulfate, ammonium sulfate and potassium chloride, urea and the like. Although these extenders are divided and used according to the purpose, among them, dry starch has a strong hygroscopic ability, and therefore also functions as a desiccant, and thus acts as a stabilizer for solid agents. In addition, crystalline cellulose is particularly useful because it also acts as a tableting modifier.

As the binder to be used, low molecular weight dextrin, polyvinyl alcohol, polyvinylpyrrolidone, carboxymethyl cellulose and the like can be given. Glinin sulfonate is particularly useful because it can be used as a dispersant and can also be used as an extender because it is relatively inexpensive.

Since the lubricant is usually added immediately before molding and mixed, the lubricant is densely distributed on the surface of the solid agent. Therefore, when using a hydrophilic thing, it becomes difficult to float. For this reason, it is preferable to select hydrophobic lubricants, such as calcium stearate, magnesium stearate, and talc, rather than using hydrophilic lubricants, such as a derivative of polyethyleneglycol (PEG) and propylene glycol, and glycerol ester.

The above-mentioned effective ingredient pulverized product and the preparation are mixed and then formulated in a dry manner using a suitable molding machine. At this time, the solid acid and the carbonate of the blowing agent are added alone or in addition to some or all of the other ingredients, and then granulated by addition of water and dried, and then the positive ingredients are mixed and solidified, but the positive ingredients of the blowing agent are mixed. Solidification by addition of water afterwards should be avoided because the solid acid and carbonate react and foam in the presence of water. That is, the solidification process should take a method of press molding without adding water. The formulation of the solid agent is preferably a bulking agent such as tablets and briquettes. As a molding machine, it can obtain by using a tableting machine in the case of a tablet, and a briquetting machine in the case of a briquette, respectively.

Although the solid agent of the present invention can be used by a worker entering a paddy field, one feature is that the solid agent can be used while being thrown into a paddy field from a paddy field or the like without entering the paddy field. Therefore, one weight of the solid agent needs to be a weight suitable for feeding into the paddy field.

When dividing into a water-soluble sheet and not packing and inject | pouring solid agent itself as it is, the weight of one solid agent is 0.1 g-10 g, Preferably it is 0.2-3 g, More preferably, in the point which is easy to throw. 0.3 ~ 1g is suitable. If it is a solid agent of this weight, the behavior in water is also favorable, and it can produce easily with a normal tableting machine and a briquetting machine. In general, when it is lighter than this, it may not reach the input target point under the influence of wind from the air. If it is heavier than this, there is a drawback that it is difficult to float rice or float on the surface of the solid while the solid material is sinking.

When dividing into water-soluble sheets and packaging, the weight of the whole bag becomes more problematic than the weight of one solid agent. Therefore, the weight of one solid agent may be lighter than what was mentioned above. However, if the contents are too small, the powder adheres to the sheet when the contents are divided into small portions, resulting in incomplete heat sealing, and excessively wet with water, so that a large number of solid agents are collected and settle in the water without being sufficiently dispersed. If the weight of one solid agent is too large, the bag may be buried in the soil for each bag, or the solid agent may not float in water. Therefore, also when using, the weight of one solid agent is 0.1g-10g, Preferably it is 0.2-3g, More preferably, about 0.3-1g is suitable.

The degree of solid agent is preferably at least 2.0 kgf in consideration of troubles such as differentiation of the solid agent with time stability and transportation. With this degree of hardness, it can withstand transportation and storage after commercialization. However, if the hardness of the solid agent is too high, weak foaming continues for a long time after the injection, and buoyancy for floating the solid agent on the water surface becomes insufficient, and as a result, the solid agent may not rise. Therefore, the hardness is preferably 10 kgf or less.

The solid agent needs to be strongly foamed immediately after the addition into water, and the amount of foaming measured by the method described below is preferably 50 ml or more per 2 g, more preferably 100 ml or more per 2 g.

As described above, after the solid agent of the present invention is introduced into water, it is necessary to rise to the surface at the earliest opportunity. In order for the solid agent of the present invention to float in water, it is required that the buoyancy is superior to the gravity of the solid agent. What acts as a buoyancy in this formulation is the foam which arises by reaction of the air contained in a solid agent, and a foaming agent, and adheres around the solid agent. Therefore, when the hardness of the solid agent is too high and the apparent specific gravity is large, the solid agent is difficult to float in order to reduce the amount of air contained in the solid agent. In addition, when the particle size of the blowing agent passes, or when the carbonate and the solid acid have low solubility in water, the reaction of both is slow, the foaming power is weak, and the solid agent is hard to float. In addition, if water penetrates into the solid agent immediately after the solid agent is added to the water and the air inside the solid agent is replaced with water, the solid agent is difficult to float. Therefore, in order to float the solid agent in water, it is necessary to select a light material as much as possible, and to increase the reactivity of the foaming agent in order to increase the reactivity of the foaming agent without increasing the weight of one solid agent more than necessary and making the hardness higher than necessary. It is important to choose a composition and grind it. Moreover, in order to prevent the penetration of water in a solid agent, it is preferable to select the hydrophobic component of the grade which does not affect the physical property of a formulation, and also to make the various components in a solid agent to some extent delicate. In addition, the shape of the solid agent is also easy to float and is related to the size, and generally thick ones are easy to float.

In this sense, it is more prone to select a dispersant or other preparation that is light and difficult to get wet with water, rather than using water-soluble crystalline ones. For this reason, it is preferable to use starch derivatives, crystalline cellulose, amorphous silicon dioxide, etc. rather than using minerals, sugar, potassium chloride, etc. Especially, when 2-50% of dry starch, such as dry corn starch and dry potato starch, is mix | blended in prescription, a solid agent tends to float and it is especially useful as a stabilizer of a foaming agent.

The fine adhesion of the generated foam around the solid agent is also important in the sense of giving buoyancy to the solid agent, and it is preferable to select a surfactant having good foamability. For this reason, when it mix | blends sodium dodecyl benzene sulfonate, for example, it is easy to float, but when it mix | blends the acetylene type surfactant which has an antifoaming effect, it becomes difficult to float.

Although the general tendency is shown above, whether or not a solid agent rises is an overall result of these various factors. As the blowing agent, a composition mainly composed of citric acid and sodium hydrogen carbonate is preferable. However, as shown in the examples, it is possible to float a solid agent even if succinic acid and sodium carbonate are used, for example, and the physical properties of the tablet The castle may float or settle. Therefore, in order to obtain the solid agent of the present invention, it is necessary to consider these various factors and to prepare the solid agent to rise as a total result.

The solid agent thus obtained may be directly put into the paddy field as it is, but when thrown by hand, a protective device such as a glove is required so as not to touch the hand directly, so that the solid agent is easily dispersed or dissolved in water (water soluble) It is safe and convenient to pack the package containing the solid agent into the paddy field as it is.

As the material of the water-soluble sheet to be used, for example, one consisting of cellulose and its derivatives, one consisting of polyvinyl alcohol and its derivatives, one consisting of a derivative of polyethylene oxide, a furan film and the like can be used, but heat sealing is possible. It is good. When sealing the edge part of a water-soluble sheet | seat, it may seal with a paste, but since it is difficult to melt | dissolve in a paddy field in addition to the problem of workability, it is preferable to seal with hot sealing.

The weight of one hundred in the case of packing is about 30-120g and is easy to throw. With this weight, children, women and the elderly can easily throw it in the same place with the input target within 15m. If it is too heavy, throwing is a pain, and it is not easy when a large amount needs to be thrown in order to process a large area. In addition, at the following lightness, it does not reach the target place under the influence of wind.

In the case of dividing and using a certain amount of the active ingredient in a certain area, if the number of inputs to the paddy field is too small, the active ingredient does not reach the entire paddy field, causing insufficient efficacy and weakness. On the contrary, too many inputs mean no labor savings. Therefore, a reasonable input should be chosen. In the case where the solid agent of the present invention is divided and packaged and thrown into the paddy field, the number of inputs is about 3 to 30 pieces per 10a, and preferably about 5 to 20 pieces.

When it is necessary to process two or more active ingredients at the same time, in the case of the conventional formulations, decomposition may cause decomposition or decay dispersion may deteriorate. In such a case, if the packaging is divided into water-soluble sheets of the present invention, the formulation can be solved by separately preparing two or more solid agents and mixing them in one bag. Simultaneous processing is possible.

The solid agent of the present invention and the package thereof are packaged with a bag such as a paper bag, a resin, or an aluminum foil bonded resin bag for transportation or the like. However, the solid agent of the present invention contains a foaming agent, and may react with moisture absorption and may not foam, and therefore, an appropriate waterproof coating should be used. Packaging in which alumina foil is bonded is preferable. If the sheath becomes fat, a small hole may be drilled only in the aluminum foil portion or a thin thread may be inserted into the heat seal portion of the aluminum foil to prevent expansion of the sheath and moisture absorption.

EXAMPLE

Although an Example is given to the following and embodiment of this invention is described more concretely, this invention is not limited to these.

[Examples 1-5]

The original premix shown in Table 1 was mixed, and it grind | pulverized twice by air pressure 6 kg / cm <2> and a feed rate of 1.5 kg / hr using JetOmizer 0101 (made by Seishin Corporation). The foaming agent component and the preparation component were added to the ground product, mixed, and then ground with a hammer mill. The particle size of the obtained pulverized product passed the whole sieve of 63 micrometers of opening diameters. The pulverized product was dry-assembled using a roller compactor mini type (manufactured by Float Industries Co., Ltd.), pulverized and passed through a sieve having an open diameter of 2 mm. A lubricating agent was added to the obtained granulated material, it mixed, and it compressed into tablets at the diameter of 1 cm and the weight of 1 tablet using 0.5 tableting machine. The obtained tablet contained 0.5% of bensulpronmethyl, 6.0% of pyributycarb, and 4.5% of dimelon. 50 g of the obtained tablet was divided into the water-soluble film (40 micrometers in thickness) which consists of a flexin (the derivative of the polyethylene oxide by Daiichi Kogyo Pharmaceutical Co., Ltd.).

[Examples 6-10]

The raw material premix shown in Table 2 was mixed, and it grind | pulverized twice by air pressure 6 kg / cm <2> and a feed rate of 1.5 kg / hr using JetOmizer 0101 (made by Seishin Corporation). The foaming agent component and the preparation component were added to the ground product, mixed, and then ground with a hammer mill. The particle size of the obtained pulverized product passed the whole sieve of 63 micrometers of opening diameters. The pulverized product was formed into an almond shape having a length of 24 mm, a butterfly 13 mm, a thickness of 7 mm, and a weight of 2.0 g using briquetting machine K102 (manufactured by Daiyo Iron Works Co., Ltd.). % And mefenacet 10.0% were contained The obtained briquette was divided into small parts as in Example 1.

[Examples 11-14]

The original premix part, the blowing agent part, and the preparation part shown in Table 3 were weighed and mixed, and then ground with a hammer mill. The particle size of the obtained pulverized product passed the whole sieve of 63 micrometers of opening diameters. The pulverized product was dry-assembled using a roller compactor mini type, crushed, and granulated by passing through a sieve having an opening diameter of 2 mm. A lubricating agent was added to the obtained granulated material, it mixed, and it compressed into tablets at the diameter of 1 cm and the weight of 1 tablet using 0.5 tableting machine. The obtained tablet contained 24% of pyrochiron. The obtained tablet was divided into 50 g each by the film of flexin (thickness 40 micrometers).

Examples 15-22

The original premixes shown in Table 4 were mixed and ground at an air pressure of 6 kg / cm 2 and a feed rate of 1.5 kg / hr using a jet atomizer 0101 type. A blowing agent and a preparation part were added to the ground product, mixed, and ground with a hammer mill. The particle size of the obtained pulverized product passed the whole sieve of 63 micrometers of opening diameters. The pulverized product was dry granulated using a roller compactor mini type, pulverized and passed through a sieve having a pore size of 2 mm. A lubricating agent was added to the obtained granulated material, it mixed, and it compressed into tablets of 1 cm in diameter and 0.5 g in weight of 1 tablet using a tableting machine. The obtained tablet contained 0.5% of bensulpronmethyl, 6.0% of pyributycarb, and 4.5% of dimelon. The obtained tablets were divided into Hyceron C-200 (manufactured by Hiai Film Co., Ltd., polyvinyl alcohol film, 40 µm thick) in small increments of 50 g.

Comparative Examples 1 to 5

In the prescription shown in Table 1, tablets were prepared in the same manner as in Examples 1 to 5, and divided into small portions.

Comparative Examples 6-10

By the prescription shown in Table 2, the briquettes were prepared like Example 6-10, and were divided small.

Comparative Examples 11-13

In the prescription shown in Table 3, tablets were prepared and divided in the same manner as in Examples 11 to 14.

Test Example

Test Example 1

The physical properties of the tablets and briquettes obtained in Examples 1 to 22 and Comparative Examples 1 to 13, and the concentration ratio of the dropping point and the peripheral portion were measured by the following method. The results were recorded in each table.

Hardness measurement of tablets and briquettes:

It measured by the digital force gauge MFG-50 type | mold by Shin-Ko Electronics Co., Ltd. Twenty solids were measured and averaged (unit kgf).

How to measure the amount of foaming:

10 ml of 20 degreeC water was put into the round bottom flask of the apparatus shown in FIG. Into this, 2 g of a solid agent was added, the cap was immediately plugged, and the generated gas was received in a collecting tube filled with 20 ° C water through a conduit, and the amount of generated gas (ml) was read after 5 minutes. At this time, the generated carbon dioxide can be dissolved in water and the solubility according to the water temperature is different, so in order to avoid errors, especially in the temperature of the water, the quantity put into the flask, the thickness of the conduit receiving the generated gas and the position of the conduit tip. Need attention

Measurement of sleep suspension;

25 degreeC water was put into the depth of 5 cm in the resin pellet of 1x1m. Fifty solids were placed at a height of 1m at a time, and the number of solids floating in five minutes was added. The number of suspended solids was doubled to determine the sleep suspension (5). At this time, the injured solids are sequentially disintegrated and dispersed, so that the shape cannot be recognized, so that the injured solids need to be counted sequentially so as to be counted without missing.

Determination of the concentration ratio between the dropping point and the periphery:

Packages of the tablets and briquettes obtained in Examples 1 to 22 and Comparative Examples 1 to 13 were dropped to a point A of 5 cm depth, which was obtained and taken as shown in FIG. After 7 days, the soils of the A, B, and C sites were aliquoted to a diameter of 7 cm and a thickness of 1 cm. The soils at points B and C were evenly mixed. The active ingredient concentration remaining at the A and B + C points was analyzed by HPLC method. For each active ingredient, the concentration ratio at both sites was obtained by dividing the concentration at site A by the concentration at site B + C.

Moreover, the solid agent prepared by Examples 1-22 was thrown into the rice paddies as it is, without dividing into the water-soluble sheet and packing. In this case, the weight of the solid agent that an adult can throw in a handful is about 50-100 g in the case of the solid agent of any embodiment. Most of the solids injected, most solids were injured within 5 minutes.

As shown in Tables 1 to 4, the solids having a water floating rate of 80% or more of the present invention have a concentration ratio of two or less of the effective ingredients in the dropping point and the peripheral portion, and the active ingredients are diffused in the sphere. The effective ingredient concentration at the dropping point was clearly high, and the diffusion was insufficient.

Pesticide solidifying agent of the present invention does not require a special mechanism, and in order to enable an extremely simple and easy pesticide treatment method that the spreader can be easily thrown out of the rice paddies without entering the paddy field, even as a combined farmhouse before going to work There is an advantage that can be dealt with in time.

In addition, there is no powdering or splashing of the chemical liquid as in the conventional method, and the stability to the spores and the environment is very high.

Moreover, the container does not require glass or plastic bottles, and can be used with paper, resin, or aluminum foil joints or boxes, so that after use, incineration is possible.

In addition, the solid agent of the present invention, after being introduced into the paddy field, floats without settling, or floats on the surface within a short time even if it is once settled. Since it dissolves or suspends, it has a property of diffusing to the entire rice field in a short time, and there is no fear of weakness or weakness due to the ubiquity of an active ingredient such as a solid agent containing a known blowing agent.

In the form of dividing into the water-soluble sheet of the present invention and packaging, it is also possible to contain two or more kinds of active ingredients, and the compounding compound, which has been conventionally used as a compounding contraindication, can be processed simultaneously. As such, the present invention provides a pesticide composition that does not harm the environment of the spreader, and contributes to the development of the pesticide and pesticide industry, which requires safety and labor reduction.

Claims (2)

Containing 15 to 60% of citric acid and 15 to 60% of sodium bicarbonate relative to the total components of the solid agent, and containing 20 to 70% of the total amount of carbonate relative to the components of the entire solid formulation, The blowing agent also contains sodium carbonate or sesquicarbonate, the average diameter of the particles of the blowing agent after grinding is 105 μm or less, the weight of one solid agent is 0.1-10 g, the hardness thereof is 2-10 kgf, and 5 It is a foaming insecticide solids which has a surface floating rate of 80% or more, has a foaming power of 50 ml or more per 2g for 5 minutes after being thrown into water, and easily disperses the active ingredient in water in the water. A pesticide preparation in a form in which the foamable insecticide solid agent according to claim 1 is easily encapsulated and dispersed in water.