JPH1017410A - Floating degradable composition excellent in underwater dispersibility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop a floating degradable composition capable of efficiently releasing small degradable particles having a proper size while widely spreading on a water surface in all directions and rapidly and uniformly dispersing an active ingredient in the wider water. SOLUTION: In this floating degradable composition comprising a slightly water-soluble or water-insoluble active ingredient, a water-soluble carrier, a film-forming substance having a dissolution rate in water lower than that of the water-soluble carrier and a surfactant, a sulfosuccinic acid alkyl ester salt or a naphthalenesulfonate condensate is used as the surfactant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating disintegrating composition having excellent dispersibility in water. More specifically, the present invention relates to a floating disintegrable composition that can disperse an active ingredient more widely and uniformly by applying to water.

[0002]

2. Description of the Related Art A buoyant composition which releases an active ingredient while spreading the water surface has been a subject of active research mainly in the field of agrochemicals as a means for dispersing the active ingredient. Various research results have been published to date.

For example, Japanese Patent Publication Nos. 48-1181, 47-1240, 48-1182, and 4
JP-A-4-8800, JP-A-55-139308 and JP-A-58-65203 disclose that an active ingredient is retained on a water-floating carrier such as foamed obsidian, pumice or calcined pearlite, and if necessary, a higher fatty acid. A water-repellent floating composition is disclosed. In addition, Tokiko 48-11
Nos. 80, 48-24222, 45-95
No. 60 and Japanese Patent Application Laid-Open No. 55-138306 disclose a floating composition in which an active ingredient is held in plastic granules having a specific gravity of 1 or less. However, these floating compositions have problems that they are too light to be swept away by the wind, and that the materials are expensive and have low biodegradability, and have not been put to practical use.

On the other hand, JP-B-48-15613 and JP-B-58-26882 disclose the use of a solid sediment substance as a nucleus, and a substance floating on water such as a waxy substance, plastic or inorganic foam on the outer surface. Compositions coated with components are disclosed. When this composition is applied to water, small buoyant particles containing the active ingredient are separated from nuclei in water and spread on the water surface. In addition, Tokiko 47-2
No. 7930 discloses that a carbonate of an alkali metal or an alkaline earth metal and a solid acid used in a part of a granule are reacted in water to generate carbon dioxide gas, and the granular material is floated by the force. A method for spreading an active ingredient on a water surface is disclosed. However, these techniques also have problems that the active ingredient is hardly eluted from the carrier and the loss of the active ingredient is large.

[0005] In order to address these problems of the prior art, there is a floating disintegrable composition disclosed in Japanese Patent Publication No. 63-30281. This suspension-disintegrating composition is formed by granulating a water-soluble carrier and a film-forming substance having a lower dissolution rate in water than the water-soluble carrier together with the active ingredient. This floating disintegrable composition is one that once submerged in water, floats on the water surface after application, disintegrates while spreading, and releases small particles containing an active ingredient. Use of this suspension-disintegrating composition makes it possible to disperse the active ingredient more effectively than conventional compositions. However,
This suspension-disintegrating composition still has room for improvement in that the composition has a small spread when it spreads over the water surface and the disintegrated active ingredient-containing small particles are rather large.

[0006]

Therefore, the present inventors have developed a floating collapsible composition that efficiently emits small colloidal particles of an appropriate size while spreading the water surface widely in various directions. With this in mind, we have been working hard on research. The present inventors aimed to provide an improved suspension-disintegrating composition, thereby enabling the active ingredient to be rapidly and uniformly dispersed in a wider body of water.

[0007]

These problems have been solved by providing the suspension disintegrating composition of the present invention. The suspension-disintegrating composition of the present invention contains a poorly water-soluble or water-insoluble active ingredient, a water-soluble carrier, a film-forming substance whose dissolution rate in water is lower than that of the water-soluble carrier, and a surfactant. is there. The feature of the present invention resides in that a sulfosuccinic acid alkyl ester salt or a naphthalene sulfonate condensate is contained as a surfactant.

When the suspension-disintegrating composition of the present invention is applied to water, the composition starts to settle because the gravity is superior to the buoyancy caused by the air existing in the voids in the composition. On the other hand, since the water-soluble carrier starts to dissolve at the same time as being applied to water, the air contained in the composition tends to dissipate, but a film-forming substance having lower water solubility than the water-soluble carrier forms a film. Most of that air remains in the composition. Therefore, as the dissolution of the water-soluble carrier progresses, the buoyancy eventually becomes superior to gravity, and the composition floats on the water surface and starts spreading. On the other hand, since the film of the film-forming substance slowly dissolves in water, if the dissolution proceeds to some extent during the spreading, the composition starts to collapse due to the influence of surface tension. Since the composition of the present invention contains a sulfosuccinic acid alkyl ester salt or a naphthalene sulfonate condensate as a surfactant, the disintegration of the composition is accelerated, and the composition rebounds due to the disintegration. It expands more vigorously. The small particles containing the active ingredient produced by the disintegration have an appropriate size and dissolve while being widely dispersed. In this way, the composition disintegrates while spreading over the water surface, and the disintegrating small particles containing the active ingredient are widely dispersed in water. As a result, the active ingredient is uniformly distributed over a wide water area, and the object of the present invention can be sufficiently achieved.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the following, details of each component used in the suspension-disintegrating composition of the present invention, a method for producing the composition, and applications are described in order.

Active Ingredients The active ingredients used in the suspension disintegrating composition of the present invention must be poorly water-soluble or water-insoluble. Unless the solubility of the active ingredient in water is lower than that of the film-forming substance, the active ingredient cannot be efficiently dispersed over a wide range after the application of the suspension-disintegrating composition. The water solubility of the active ingredient is not particularly limited as long as it is hardly water-soluble or water-insoluble, but for example, those having 1% or less at 20 ° C. can be used. The content of the active ingredient is not particularly limited, but is usually 0.01 to 80% by weight, preferably 0.1 to 60% by weight of the suspension-disintegrating composition.

The active ingredient used in the suspension-disintegrating composition of the present invention is selected from substances having activity according to the purpose of use of the suspension-disintegrating composition. For example, when the suspension-disintegrating composition is used as a pesticide, a substance having a herbicidal activity, an insecticidal activity, a bactericidal activity or a plant growth regulating activity can be selected as an active ingredient. When the suspension disintegrating composition is used as a fertilizer for crops, a fertilizer component can be selected as an active component. Furthermore, when the floating disintegrable composition is used for the purpose of purifying stored water or pooled water, coloring, imparting a fragrance, and the like, an active ingredient such as an active substance for controlling bofra, a coloring agent, and hot water can also be selected. These active ingredients may be used alone or in combination of two or more. As described above, the active ingredient used in the suspension-disintegrating composition of the present invention can be appropriately selected from a wide range of poorly water-soluble or water-insoluble substances having activity according to the purpose of use. Specifically, the following active ingredients can be exemplified, but are not limited thereto.

Active ingredients having herbicidal activity include cafentrol, mefenacet, pretilachlor, esprocarb, pyributicarb, tenylchlor, butamiphos, edbenzanide, dimepylate, 2- 、 2-
(3-chlorophenyl) -2,3-epoxypropyl
-2-ethylindane-1,3-dione, ｛(4,6-
Dimethoxypyrimidin-2-yl) oxy} -6- {1
-(Methoxyimino) ethyl methyl benzoate, 3N-
(2-Fluoro-4-chlorocyclopentyloxyphenyl) -5-isopropylidene-1,3-oxazolidine-2,4-dione, 4- (2-chlorophenyl) -N
-Cyclohexyl-4,5-dihydro-N-ethyl-5
-Oxo-1H-tetrazole-1-carboxamide, cyhalofop butyl, bifenox, pyrazoxifene, pyrazolate, benzofenap, clomeprop, dimethamethrin, simethrin, MCPP, bentazone, bensulfuronmethyl, 1H-pyrazole-5
Sulfonamide, N-{(4,6-dimethoxypyrimidin-2-yl) aminocarbonyl} -1-methyl-4-
(2-methyl-2H-tetrazol-5-yl) azimulfuron, 3- (4,6-dimethoxypyrimidine-2
-Yl) -1- (2-ethoxyphenoxysulfonyl)
Examples thereof include urea, cyclosulfamuron, imazosulfuron, pyrazosulfuron-ethyl, sinosulfuron, naproanilide, bromobutide, dimuron, cumyluron, and benfreserate.

As active ingredients having insecticidal activity, diazinon, fenitrothion, chlorofenvinfos,
Examples include binifete, carbaryl, fenobcarb, carbosulfan, benfracarb, thiodicarb, cycloprothrin, etofen block, thiocyclam, buprofezin, and imidacloprep.
Also, as active ingredients having bactericidal activity, kitadine P,
Edifenfos, mepronil, flutranil, pencyclone, isoprothiolane, tricyclazole, pyroquilone can be exemplified. Further, examples of the active ingredient having a plant growth regulating action include inabenfide, uniconazole, pacloptrazol, and calcium prohexadione.

Water-soluble carrier As the water-soluble carrier used in the suspension-disintegrating composition of the present invention, those commonly used in the fields of agricultural chemicals, pharmaceuticals and the like can be widely used. For example, urea, ammonium sulfate,
Ammonium nitrate, ammonium chloride, potassium chloride,
Powders such as ammonium bicarbonate, sodium sulfate, borax, sodium carbonate and sugar can be used,
It is not limited to these. These water-soluble carriers may be used alone or in combination of two or more.

The amount of the water-soluble carrier to be used is usually 30 to 99% by weight, preferably 70 to 98% by weight of the suspension-disintegrating composition. The type and amount of the water-soluble carrier can be appropriately changed depending on the function expected of the suspension-disintegrating composition. For example, the time until the composition floats on the water surface after application can be controlled by changing the dissolution rate of the water-soluble carrier in water. Further, the disintegration time of the composition can be adjusted by selecting in combination with the dissolving ability of a film-forming substance described later. Various adjustments including these can be appropriately performed within the technical suggestion of the present specification and the technical knowledge of those skilled in the art.

Film-forming substance The film-forming substance used in the suspension-disintegrating composition of the present invention must have a dissolution rate in water lower than that of a water-soluble carrier. The use of such a film-forming substance is intended to prevent air contained in the composition from dissipating out of the composition simultaneously with dissolution of the water-soluble carrier. The film-forming substance used in the present invention is capable of retaining most of the air that tends to dissipate in the composition due to its slow dissolution rate in water. That is, since the three-dimensional network structure formed by the film-forming substance plays the role of a film, air that has been prevented from diffusing is retained in the composition. As a result, as the dissolution of the water-soluble carrier proceeds, the buoyancy of the remaining air becomes superior to gravity, and the composition floats.

In the present invention, various organic or inorganic substances capable of forming a film can be used as the film-forming substance. For example, gum arabic, xanthan gum, dextrin, sodium salt of carboxymethyl cellulose, sodium alginate, modified starch, polyvinyl alcohol, polyethylene oxide, sodium silicate, potassium silicate, and sodium polyacrylate can be used, but are not limited thereto. These film-forming substances may be used alone or in combination of two or more.

The amount of the film-forming substance used is usually from 0.1 to 30% by weight, preferably from 0.1 to 30% by weight of the suspension-disintegrating composition.
-10% by weight. The type and amount of the film-forming substance can be appropriately changed depending on the function expected of the suspension-disintegrating composition. For example, by using a substance that forms a relatively strong three-dimensional network structure, the disintegration start time of the composition can be delayed or the disintegration time of the composition can be prolonged. The disintegration start time and disintegration time of the composition can also be controlled by using film-forming substances having different dissolution rates in water.
Such adjustment can be performed more effectively by performing the adjustment together with the selection of the water-soluble carrier described above.

Surfactant The suspension disintegrating composition of the present invention must contain a sulfosuccinic acid alkyl ester salt or a naphthalene sulfonate condensate as a surfactant. The content of these surfactants is usually 0.1% of the suspension disintegrating composition.
It is 5 to 20% by weight, preferably 0.5 to 10% by weight.

It has been surprisingly found that the use of these surfactants improves the disintegration of the suspension-disintegrating composition and greatly improves the dispersibility of the active substance. This is due to the accelerated disintegration of the composition by using these surfactants. Due to the accelerated disintegration, the disintegrating small particles containing the active substance are released vigorously. Moreover, the size of the disintegrated small particles is suitable for dispersing in water, so that the active substance can be more widely dispersed. On the other hand, the composition itself floating on the water surface also expands in the opposite direction to the collapsed small particles due to the recoil of the collapse. Because disintegration occurs randomly at various parts of the composition one after another,
The composition spreads widely, wandering the water surface in various directions. In this way, the active ingredient can be dispersed over a very wide range, both by the composition spreading the water surface and by the disintegrating small particles dispersed in the water. A composition having such a function has never existed before.

The alkyl sulfosuccinate used in the present invention is a compound represented by the following general formula.

Embedded image

In the above formula, R ₁ and R ₂ may be the same or different and each represents hydrogen or an alkyl group. However, R ₁ and R ₂ are not both hydrogen.
Preferably, it is an alkyl group having 6 to 13 carbon atoms. M
Represents an alkali metal. Specific examples of the alkyl sulfosuccinate include dioctyl sodium sulfosuccinate, dioctyl calcium sulfosuccinate, monooctyl sodium sulfosuccinate, and monooctyl calcium sulfosuccinate. Further, as a composition containing a sulfosuccinic acid alkyl ester salt,
Sanmorin OT ^R (manufactured by Sanyo Chemical Industries Co., Ltd.), NEOCOL Y
SK ^R (Daiichi Kogyo Seiyaku Co., Ltd.), Air Roll OP ^R (Toho Chemical Industry Co., Ltd.), Newcol 290M ^R (Nippon Emulsifier Co., Ltd.), Pionin A-51W (Takemoto Yushi Co., Ltd.) ) Can be exemplified.

The naphthalene sulfonate condensate used in the present invention is a compound represented by the following general formula.

Embedded image

In the above formula, m is 1 to 6, preferably 1. Further, n is 1 to 10, preferably 5. As a composition containing a naphthalene sulfonate condensate, Newcargen WG-2 ^R (Takemoto Yushi Co., Ltd.)
Co., Ltd.), and Labelin W-40 ^R (Daiichi Kogyo Seiyaku Co., Ltd.).

The suspension-disintegrating composition of the present invention may appropriately contain, in addition to the above-mentioned surfactants, surfactants usually used in the fields of agricultural chemicals and medicines.
For example, as nonionic surfactants, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene alkyl amino ether, polyoxyethylene alkyl amide, polyoxyethylene polyoxypropylene ether, polyoxyethylene sorbitan alkyl ether And polyoxyethylene alkylphenyl condensate ethers. Examples of the anionic surfactant include an alkyl sulfate, an alkyl allyl sulfonate, a polyoxyethylene alkyl ether sulfate, a polycarboxylate, and an alkyl phosphate. Furthermore, examples of the amphoteric surfactant include alkyl polyaminoethyl glycine hydrochloride and alkyl dimethyl betaine.
By appropriately selecting the combination of these surfactants, the disintegration, dispersibility, and spreadability of the floating disintegrable composition can be further improved.

Other Ingredients To produce the suspension disintegrating composition of the present invention, it is essential to use water. The amount of water contained in the suspension-disintegrating composition of the present invention is usually 3 to 25% by weight, preferably 5 to 15% by weight of the suspension-disintegrating composition. However, by drying after granulation, a composition containing almost no water can be obtained.

The suspension-disintegrating composition of the present invention can contain substances other than the above-mentioned components, if necessary. For example, to dissolve the active ingredient, reduce the viscosity, or to increase the activity and dispersibility of the active ingredient, dioctyl phthalate, methyl naphthalene, dioctyl adipate, butyl benzyl phthalate, dibutyl phthalate,
High boiling solvents such as tricresyl phosphate and butyl oleate can be preferably used. However,
The amount of these solvents used must be such that the composition of the present invention floats on water when the water-soluble carrier is dissolved.

The composition of the present invention can contain carboxymethyl cellulose having a low polymerization degree. By using carboxymethylcellulose in combination with a sulfosuccinic acid alkyl ester salt or a naphthalene sulfonate condensate, the disintegration, dispersibility, and spreadability of the floating disintegratable composition can be improved. As carboxymethyl cellulose, for example, those having a degree of polymerization of 100 to 1000 and a degree of etherification of 0.5 to 0.8 can be used. Examples of the composition containing carboxymethylcellulose include cellogen PR ^R (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) and cellogen 7A ^R (daiichi Kogyo Seiyaku Co., Ltd.)
Ltd.) can be exemplified CELLOGEN WS-A ^R (manufactured by Dai-ichi Kogyo Seiyaku Co.).

Further, the surface of the suspension disintegrating composition of the present invention may be further coated with another layer. For example, by providing a water-soluble component having a lower dissolution rate in water than the water-soluble carrier used in the present invention as an outer shell layer, the time during which the composition floats on the water surface can be delayed. In addition, by using a water-soluble component whose solubility varies greatly depending on the temperature in the outer shell layer, the active component can be released from the composition when the water temperature reaches a certain temperature.

Production Method The suspension-disintegrating composition of the present invention can be produced by the same method as that for producing ordinary granules and the like. For example, it can be manufactured by kneading an active ingredient, a water-soluble carrier, a film-forming substance, and a surfactant with water, forming the mixture into granules or spheres, and drying. Further, it can also be produced by kneading a water-soluble carrier, a film-forming substance and a surfactant with water, forming the mixture into granules or spheres, drying and holding the active ingredient in the obtained granules. . Further, the surfactant can be added after being previously mixed with water, or the active component can be added after being previously dissolved in an organic solvent.

The method for producing the suspension-disintegrating composition of the present invention comprises:
This is specifically described in Examples described later, and a person skilled in the art can manufacture a desired floating disintegratable composition by appropriately making obvious changes based on the specific examples.

Use The suspension-disintegrating composition of the present invention can be widely used in a situation where the active ingredient is to be widely and uniformly dispersed. Its use can be appropriately selected according to the purpose of the active ingredient to be included in the suspension disintegrating composition of the present invention,
It is very diverse. For example, pesticides used in paddy fields, purifiers and deodorants used for purifying reservoirs, bait for cultured fish and shellfish, fungicides used for pools, hot water used for large public baths in hotels and inns, dye solutions for dyes Can be used as dyes and pigments used for the preparation of colored inks, and as colorants used for preparing a large amount of colored water for events and photography.

In particular, in the field of agriculture, it is effective to use the suspension-disintegrating composition of the present invention as a herbicide, insecticide, fungicide or plant growth regulator for paddy fields. As described in Examples below, when the suspension disintegrating composition of the present invention is applied to the edge of a partitioned paddy field, the herbicidal active ingredient is widely and uniformly distributed. For this reason, if the present invention is used, it is only necessary to put the herbicide into the paddy field from the ridge, and there is no need to separately enter the paddy field and spray. Furthermore, if the composition of the present invention is thrown into an aqueous system such as a paddy field as a package using a water-soluble film, the water-soluble film dissolves and the composition floats, and the active ingredient is widely spread in water and easily. Pests can be controlled. For this reason, the suspended disintegratable composition of the present invention is extremely useful for a farmer who is depopulated or aging and has a serious labor shortage.

As described above, the floating time, dissolution rate, disintegration start time, disintegration time, etc. of the composition are appropriately controlled by adjusting the type and amount of the components used in the suspension disintegratable composition of the present invention. be able to. For this reason, the floating disintegratable composition of the present invention can have a function according to the use situation. Therefore, the floating disintegrable composition of the present invention has a very wide application range, and is expected to have extremely high industrial applicability.

[0035]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the scope of the present invention. In Examples, “parts” represents parts by weight, and “%” represents weight%.

Specific Examples of the Suspended Disintegrating Composition of the Present Invention In the following Examples 1 to 5, the components of the floating disintegrating composition of the present invention and the production method are described.

Example 1 The components shown in Table 1 were uniformly mixed, kneaded by adding 15 parts of water, and having a diameter of 1.2 mm.
After extrusion granulation with a screen of
A 2-mesh granular suspension-disintegrating composition was obtained.

TABLE 1 cafenstrole 3.0 parts of bensulfuron methyl 0.5 part of xanthan gum and 0.5 part Sanmorin OT ^R [dioctyl sodium sulfosuccinate] 2.0 parts of polyoxyethylene nonylphenyl ether 3.0 parts potassium chloride 91.0 parts

Example 2 The components shown in Table 2 were uniformly mixed, and 17 parts of water was added and kneaded to obtain a mixture having a diameter of 1.2 mm.
After extrusion granulation with a screen of
A 2-mesh granular suspension-disintegrating composition was obtained.

Table 2 Mefenacet 10.0 parts Pyrazosulfuron-ethyl 0.3 parts Xanthan gum 0.5 parts Newcargen WG-2 ^R [sodium naphthalene sulfonate condensate] 2.5 parts Polyoxyethylene styrenated phenyl ether 3.0 Parts potassium chloride 83.7 parts

Example 3 The components shown in Table 3 were uniformly mixed, and 13 parts of water was added and kneaded to obtain a mixture having a diameter of 1.2 mm.
After extrusion granulation with a screen of
A 2-mesh granular suspension-disintegrating composition was obtained.

TABLE 3 Inabenfide 5.0 part of xanthan gum 0.7 parts Sanmorin OT ^R [sodium dioctyl sulfosuccinate] 2.5 parts Newkalgen WG-2 ^R [sodium naphthalenesulfonate condensate] 2.0 parts of sodium chloride 89.8 Department

Example 4 The components shown in Table 4 were uniformly mixed, and 13 parts of water was added and kneaded to obtain a mixture having a diameter of 0.9 mm.
After extrusion granulation with a screen of
A 2-mesh granular suspension-disintegrating composition was obtained.

TABLE 4 carbaryl 5.0 part of xanthan gum and 0.6 part Sanmorin OT ^R [sodium dioctyl sulfosuccinate] 2.5 parts of lignin sodium sulfonate 2.5 parts of sodium chloride 89.4 parts

Example 5 The components shown in Table 5 were uniformly mixed, and 13 parts of water was added and kneaded to obtain a mixture having a diameter of 0.9 mm.
After extrusion granulation with a screen of
A 2-mesh granular suspension-disintegrating composition was obtained.

TABLE 5 carbaryl 5.0 parts CELLOGEN PR ^R [low degree of polymerization, sodium carboxymethylcellulose, average polymerization degree of 220-250, etherification degree 0.6-0.7] 1.0 part of xanthan gum and 0.6 part Sanmorin OT ^R [Dioctyl sodium sulfosuccinate] 2.5 parts Sodium ligninsulfonate 2.5 parts Sodium chloride 88.4 parts

Comparative compositions according to the prior art The following comparative examples 1 to 4 describe control compositions prepared according to the prior art. The control compositions of Comparative Examples 1-4 correspond to the compositions of the invention described in Examples 1-4, respectively.

(Comparative Example 1) The components shown in Table 6 were uniformly mixed, kneaded by adding 15 parts of water, and having a diameter of 1.2 mm.
After extrusion granulation with a screen of
A 2-mesh granular composition was obtained.

[Table 6] Cafentrol 3.0 parts Bensulfuron methyl 0.5 parts Xanthan gum 0.5 parts Sodium dodecylbenzenesulfonate 2.0 parts Polyoxyethylene nonyl phenyl ether 3.0 parts Potassium chloride 91.0 parts

Comparative Example 2 The components shown in Table 7 were uniformly mixed, and 17 parts of water was added and kneaded to obtain a mixture having a diameter of 1.2 mm.
After extrusion granulation with a screen of
A 2-mesh granular composition was obtained.

Table 7 Mefenacet 10.0 parts Pyrazosulfuron ethyl 0.3 parts Xanthan gum 0.5 parts Sodium lauryl sulfate 2.5 parts Polyoxyethylene styrenated phenyl ether 3.0 parts Potassium chloride 83.7 parts

Comparative Example 3 The components shown in Table 8 were uniformly mixed, and 13 parts of water was added and kneaded to obtain a mixture having a diameter of 1.2 mm.
After extrusion granulation with a screen of
A 2-mesh granular composition was obtained.

Table 8 Inabenfide 5.0 parts Xanthan gum 0.7 parts Sodium dodecylbenzenesulfonate 2.5 parts Sodium lauryl sulfate 2.0 parts Sodium chloride 89.8 parts

Comparative Example 4 The components shown in Table 9 were uniformly mixed, and 13 parts of water was added and kneaded to obtain a mixture having a diameter of 0.9 mm.
After extrusion granulation with a screen of
A 2-mesh granular composition was obtained.

TABLE 9 Carbaryl 5.0 parts Xanthan gum 0.6 parts Polyoxyethylene octyl phenyl ether 2.5 parts Sodium ligninsulfonate 2.5 parts Sodium chloride 89.4 parts

Comparative Tests In the following Test Examples 1 to 3, the effects of the compositions of the present invention prepared in Examples 1 to 5 and the control compositions prepared in Comparative Examples 1 to 4 were examined and compared. (Test Example 1) Herbicidal effect on paddy weeds and phytotoxicity test on rice Planting density of rice (Koshihikari) at the 2 leaf stage in a paddy field having a depth of 3 to 5 cm and four compartments of 5 m in length and 15 m in width.
The plants were transplanted at 6 strains / m ² , and seeds of Nobie and Firefly were sown as weeds. Ten days after transplanting the rice, the composition of the present invention prepared in Examples 1 and 2 and the control composition prepared in Comparative Examples 1 and 2 were applied to each compartment in an amount of 1 kg per 10a. Application of each composition was performed by uniformly charging a 5 mx 50 cm area along the vertical side of each section. 30 days after the application of the composition, the herbicidal effects of Nobies and fireflies and the phytotoxicity on rice were observed at 0 to 0.5 m, 5 m, 10 m and 15 m from the composition application area, and evaluated according to the criteria shown in Tables 10 and 11. did. The results were as shown in Table 12.

[0048]

TABLE 10 suppression grass rate criteria evaluation barnyardgrass, bulrush herbicidal effects against barnyardgrass, bulrush 5 90% (almost dead) 4 70-89% 3 40-69% 2 20-39% 1 6-19% 0 5 % Or less (almost no effect)

[0049]

[Table 11] of the evaluation criteria evaluation of rice phytotoxicity against rice phytotoxicity +++++甚害++++ Daigai +++ in harm ++ small harm +僅小harm - harmless

[0050]

[Table 12] Test results Distance from application area and evaluation composition Grass species 0-0.5 m 5 m 10 m 15 m Example 1 Rice ----Novier 55 55 5 Firefly 55 55 5 Comparative Example 1 Rice +++ + −− Novie 55 3 2 Firefly 5 200 Example 2 Rice −−−−− Novie 5.55 5 Fireflies 5.55 5 Comparative Example 2 Rice ++++ + −−− Novie 55 3 31 Fireflies 5.55 2 1

Test Example 2 Rice Growth Inhibition Test Rice (Koshihikari) at the 2 leaf stage is planted in a paddy field having three sections of 5 m in length and 15 m in width at a depth of 3 to 5 cm.
Transplanted at 6 strains / m ² . Forty days after transplanting the rice, the composition of the present invention prepared in Example 3 and the control composition prepared in Comparative Example 3 were applied to the compartment in an amount of 3 kg per 10a. Application of each composition was performed by uniformly charging a 5 mx 50 cm area along the vertical side of the compartment. The remaining one compartment did not receive the composition.
30 days after application of the composition, 0 to 0
The plant height of rice at 0.5 m, 5 m, 10 m and 15 m was measured. The results were as shown in Table 13.

[0052]

Table 13 Results of measurement of plant height Distance from application area and plant height (cm) Composition (kg / 10a) 0-0.5 m 5 m 10 m 15 m Example 3 3 57.2 58.0 57.8 57.8 0 Comparative Example 3 3 42.3 50.1 62.5 64.0 None 0 65.4 65.0 65.7 65.5

(Test Example 3) Insecticidal effect test on brown planthopper In a paddy field having a depth of 3 to 5 cm and four sections of 5 m in length and 15 m in width, planting density of rice (Koshihikari) at the 2 leaf stage.
Transplanted at 6 strains / m ² . Thirty days after transplanting the rice, 0 to 0.5 m, 5 m,
At 10 m and 15 m, metal wire mesh cages were installed, into which 40 males and females of the brown planthopper were released.
The next day, the compositions of the present invention prepared in Examples 4 and 5 and the control composition prepared in Comparative Example 4 were applied to the compartment in an amount of 3 kg per 10a. Application of each composition was performed by uniformly charging a 5 mx 50 cm area along the vertical side of the compartment. The remaining one compartment did not receive the composition. The day after the application of the composition, the number of dead insects of the brown planthopper at 0 to 0.5 m, 5 m, 10 m and 15 m from the composition application area was examined to determine the insecticidal rate. The results were as shown in Table 14.

[0054]

Table 14 Insecticidal effect test results Distance from application area and insecticidal rate (%) Composition (kg / 10a) 0 to 0.5 m 5 m 10 m 15 m Example 4 3 95 98 97 98 Example 5 3 100 99 99 98 Comparative Example 4 3 97 85 50 20 None 0 0 2 1 0

[0055]

According to the floating disintegrating composition of the present invention,
It is possible to disperse the active ingredient widely and uniformly. For this reason, by applying the composition of the present invention to a part of a wide water area, the active ingredient can be efficiently distributed throughout. Therefore, the floating disintegratable composition of the present invention,
It can be widely used in agriculture, horticulture, fisheries, hot springs, public baths, pools, etc., and its application range is extremely wide.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Mikio Sekiguchi Inventor 225-1 Horikome, Oshikiya, Ageo City, Saitama Prefecture Nippon Kayaku Co., Ltd.

Claims (5)

[Claims] 1. A floating disintegrating composition comprising a sparingly water-soluble or water-insoluble active ingredient, a water-soluble carrier, a film-forming substance whose dissolution rate in water is lower than that of the water-soluble carrier, and a surfactant, A floating disintegrating composition comprising a sulfosuccinic acid alkyl ester salt or a naphthalene sulfonate condensate as a surfactant. 2. The suspension disintegrating composition according to claim 1, wherein the surfactant comprises dioctyl sodium sulfosuccinate or sodium naphthalene sulfonate condensate. 3. The suspension-disintegrating composition according to claim 1, further comprising carboxymethylcellulose having a low degree of polymerization. 4. A method for enhancing the disintegration of a suspension-disintegrating composition containing a poorly water-soluble or water-insoluble active ingredient, a water-soluble carrier, and a film-forming substance having a lower dissolution rate in water than that of the water-soluble carrier. Use of a sulfosuccinic acid alkyl ester salt or a naphthalene sulfonate condensate. 5. Use of the suspension-disintegrating composition according to any one of claims 1-3 as a paddy field herbicide, an insecticide, a fungicide or a plant growth regulator.