JP2000128705A - Granular agrochemical composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a granular agrochemical composition capable of efficiently controlling the elution of agrochemically active ingredients. SOLUTION: This composition is a granular agrochemical composition comprising particles composed of an inner core and a coated layer. The oil- absorbing rate of the inner core is 20 or smaller and the proportion of the coating rate based on the oil-absorbing rate of the inner core is 0.1-10 when the percentage of the weight of the coated layer based on the weight of the inner core in the granular agrochemical composition is the coating rate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a granular pesticide composition.

[0002]

2. Description of the Related Art
The dissolution of the pesticide is controlled by allowing the pesticide to be supported on a granular carrier by a binder (Japanese Patent Application Laid-Open No. 58-205536) or by coating with a resin (Japanese Patent Publication No. 60-44967, Japanese Patent Application No. 64-4484, etc.). In addition, granular pesticidal compositions having enhanced sustainability of efficacy are known. However, in many cases, relatively large amounts of binders and resins are required in order to impart this effect, and it is desired to develop formulations that can achieve more efficient sustained release of pesticides. Was rare.

[0003]

Means for Solving the Problems As a result of repeated investigations on a granular pesticidal composition, the present inventors have found that particles composed of an inner core and a coating layer, the oil absorption of the inner core and the coating for the oil absorption. The present inventors have found that a granular pesticidal composition in which the ratio of the ratio (percentage of the weight of the coating layer to the weight of the inner core) is defined in a specific numerical range can control the dissolution of the pesticidal active ingredient extremely efficiently, and have reached the present invention. That is, the present invention relates to a granular pesticidal composition comprising particles composed of an inner core and a coating layer, wherein the oil absorption of the inner core is 20 or less, and the percentage of the coating layer weight with respect to the inner core weight is defined as the coating rate. ,
The present invention relates to a granular pesticidal composition (hereinafter, referred to as the composition of the present invention), wherein the ratio of the coverage to the oil absorption of the inner core is 0.1 to 10.

[0004]

BEST MODE FOR CARRYING OUT THE INVENTION The composition of the present invention comprises particles whose inner core is coated with a coating layer. The inner core in the present invention is a granular structure containing an agricultural chemical active ingredient, and the coating layer is a film-like structure three-dimensionally surrounding the inner core.

[0005] Unless otherwise specified, in this specification, the inner core, the coating layer, the pesticidal active ingredient, the solid carrier, the binder,
When describing the content of a water-soluble polymer, a film-forming substance, a surfactant, a solvent, a stabilizer, a coloring agent, a fragrance, and the like, the "content of the composition of the present invention" or "...""The content of the composition of the present invention" means the value expressed as the average of the content in the particles based on the average of the particles in the composition of the present invention, "the content of ... in the inner core" Amount ”or“ ・
"The content of... With respect to the inner core" also means a value expressed as an average value of the content in the inner core based on the average of the inner core in the composition of the present invention.

[0006] The content of the inner core in the composition of the present invention is usually 50 to 99.9% by weight, preferably 85 to 99.8% by weight, and the oil absorption of the inner core is 20 or less, preferably 10 or less. It is. The oil absorption of the inner core is JIS K-5
101 can be measured by the following method.

The core of the sample is weighed into a glass container and
Heat to Next, linseed oil heated to 80 ° C. is dropped on the inner core and mixed with a spatula. The dropping and mixing of linseed oil are repeated to obtain the amount of linseed oil when stickiness occurs in the entire inner core and the stickiness does not disappear for 10 minutes or more, and the oil absorption is calculated by the following equation.

[0008]

## EQU00001 ## Oil absorption = linseed oil amount (ml) / sample amount (g) .times.100

The inner core of the composition of the present invention is a granular material containing an active ingredient of agrochemicals, a water-soluble polymer, and a solid carrier, and may have a uniform structure as a whole. The component may be unevenly distributed, for example, may have a multilayer structure.

[0010] Examples of the pesticidal active ingredient in the present invention include the following compounds. Fenitrothion [O, O-dimethyl O- (3-methyl-4-
Nitrophenyl) phosphorothioate], phenthione [O, O-dimethyl O- (3-methyl-4- (methylthio) phenyl) phosphorothioate], diazinone [O, O-diethyl-O-2-isopropyl-6-methylpyrimidine-4 -Yl phosphorothioate], chlorpyrifos [O, O-diethyl-O-3,5,6-trichloro-2-pyridyl phosphorothioate], acephate [O, S-dimethylacetyl phosphoramidothioate], methidathion [S-2,3 -Dihydro-5-methoxy-2-oxo-1,3,4-thiadiazole-3-
Ylmethyl O, O-dimethyl phosphorodithioate],
Disulfoton [O, O-diethyl S-2-ethylthioethyl phosphorodithioate], DDVP [2,2-dichlorovinyldimethyl phosphate], sulfophos [O
-Ethyl O-4- (methylthio) phenyl S-propyl phosphorodithioate], cyanophos [O-4-cyanophenyl O, O-dimethyl phosphorothioate], dioxabenzophos [2-methoxy-4H-1,3,3. 2-benzodioxaphosphorin-2-sulfide], dimethoate [O, O-dimethyl-S- (N-methylcarbamoylmethyl) dithiophosphate], fentoate [ethyl 2-dimethoxyphosphinothioylthio (phenyl) acetate] , Malathion [diethyl (dimethoxyphosphinothioylthio) succinate], trichlorfon [dimethyl 2,2,2-trichloro-1-hydroxyethylphosphonate], azinephosphmethyl [S-3,
4-dihydro-4-oxo-1,2,3-benzotriazin-3-ylmethyl O, O-dimethylphosphorodithioate], monocrotophos [dimethyl-{(E) -1-)
Methyl-2- (methylcarbamoyl) vinyl) phosphate], ethion [O, O, O ', O'-tetraethyl-S, S'-methylenebis (phosphorodithioate)]
Organic phosphorus compounds such as

BPMC [2-sec-butylphenylmethylcarbamate], benfracarb [ethyl N-
{2,3-dihydro-2,2-dimethylbenzofuran-
7-yloxycarbonyl (methyl) aminothio} -N
-Isopropyl-β-alaninate], propoxur [2-isopropoxyphenyl-N-methylcarbamate], carbosulfan [2,3-dihydro-2,2-
Dimethyl-7-benzo [b] furanyl N-dibutylaminothio-N-methylcarbamate], carbaryl [1
-Naphthyl-N-methyl carbamate], methomil [S
-Methyl-N- (methylcarbamoyloxy) thioacetimidate], ethiophencarb [2- (ethylthiomethyl) phenylmethylcarbamate], aldicarb [2-methyl-2- (methylthio) propionaldehyde O-methylcarbamoyloxime], Carbamate compounds such as oxamil [N, N-dimethyl-2-methylcarbamoyloxyimino-2- (methylthio) acetamide] and phenothiocarb [S-4-phenoxybutyl-N, N-dimethylthiocarbamate];

Etofenprox [2- (4-ethoxyphenyl) -2-methyl-1- (3-phenoxybenzyl) oxypropane], fenvalerate [(RS)
-Α-cyano-3-phenoxybenzyl (RS) -2
-(4-chlorophenyl) -3-methylbutyrate],
Esfenvalerate [(S) -α-cyano-3-phenoxybenzyl (S) -2- (4-chlorophenyl)
-3-methylbutyrate], fenpropatrin [(R
S) -α-Cyano-3-phenoxybenzyl 2,2
3,3-tetramethylcyclopropanecarboxylate], cypermethrin [(RS) -α-cyano-3-phenoxybenzyl (1RS) -cis, trans-3-
(2,2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate], permethrin [3-phenoxybenzyl (1RS) -cis, trans-3-
(2,2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate], cyhalothrin [(RS)
-Α-cyano-3-phenoxybenzyl (1RS, 3
Z) -cis-3- (2-chloro-3,3,3-trifluoroprop-1-enyl) -2,2-dimethylcyclopropanecarboxylate], deltamethrin [(S)-
α-cyano-3-phenoxybenzyl (1R) -cis-3- (2,2-dibromovinyl) -2,2-dimethylcyclopropanecarboxylate], cycloprothrin [(RS) -α-cyano-3- Phenoxybenzyl
(RS) -2,2-dichloro-1- (4-ethoxyphenyl) cyclopropanecarboxylate], fluvalinate [α-cyano-3-phenoxybenzyl N- (2
-Chloro-α, α, α-trifluoro-p-tolyl)-
D-valinate], bifenthrin [2-methyl-3-
Phenylbenzyl (1RS, 3Z) -cis-3- (2
-Chloro-3,3,3-trifluoro-1-propenyl) -2,2-dimethylcyclopropanecarboxylate], halfenprox [2- (4-bromodifluoromethoxyphenyl) -2-methyl-1- ( 3-phenoxybenzyl) methylpropane], tralomethrin [(S) -α-cyano-3-phenoxybenzyl (1
R) -cis-3- (1,2,2,2-tetrabromoethyl) -2,2-dimethylcyclopropanecarboxylate], silafluofen [(4-ethoxyphenyl)-
{3- (4-fluoro-3-phenoxyphenyl) propyl} dimethylsilane], d-phenothrin [3-phenoxybenzyl (1R) -cis, trans-2,2-
Dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylate], cyphenothrin [(R
S) -α-Cyano-3-phenoxybenzyl (1R)
-Cis, trans-2,2-dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylate], d-resmethrin [5-benzyl-3-furylmethyl (1R) -cis, trans-2, 2-dimethyl-
3- (2-methyl-1-propenyl) cyclopropanecarboxylate], acrinasulin [(S) -α-cyano-3-phenoxybenzyl (1R, 3Z) -cis-
(2,2-dimethyl-3- {3-oxo-3- (1,
1,1,3,3,3-hexafluoropropyloxy)
Propenyl @ cyclopropanecarboxylate], cyfluthrin [(RS) -α-cyano-4-fluoro-3-
Phenoxybenzyl 3- (2,2-dichlorovinyl)
-2,2-dimethylcyclopropanecarboxylate], tefluthrin [2,3,5,6-tetrafluoro-4-methylbenzyl (1RS, 3Z) -cis-3-
(2-chloro-3,3,3-trifluoro-1-propenyl) -2,2-dimethylcyclopropanecarboxylate], transfluthrin [2,3,5,6-tetrafluorobenzyl (1R) -trans -3- (2,2
-Dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate], tetramethrin [3,4,5,6
-Tetrahydrophthalimidomethyl (1RS) -cis, trans-2,2-dimethyl-3- (2-methyl-
1-propenyl) cyclopropanecarboxylate],
Allethrin [(RS) -2-methyl-4-oxo-3-
(2-propenyl) -2-cyclopenten-1-yl
(1RS) -cis, trans-2,2-dimethyl-3-
(2-methyl-1-propenyl) cyclopropanecarboxylate], prarethrin [(S) -2-methyl-4
-Oxo-3- (2-propynyl) -2-cyclopenten-1-yl (1R) -cis, trans-2,2-dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylate] , Empentrin [(RS)
-1-ethynyl-2-methyl-2-pentenyl (1R)
-Cis, trans-2,2-dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylate], imiprosulin [2,5-dioxo-3- (2-
Propynyl) imidazolidin-1-ylmethyl (1
R) -cis, trans-2,2-dimethyl-3- (2-
Methyl-1-propenyl) cyclopropanecarboxylate], d-framethrin [5- (2-propynyl) furfuryl (1R) -cis, trans-2,2-dimethyl-3- (2-methyl-1-pro Pyrenyloid compounds such as [(nyl) cyclopropanecarboxylate] and 5- (2-propynyl) furfuryl 2,2,3,3-tetramethylcyclopropanecarboxylate;

Buprofezin [2-tert-butylimino-3-isopropyl-5-phenyl-1,3,5-
Thiadiazine derivatives such as thiadiazin-4-one], nitroimidazolidine derivatives, cartap [S, S'-
(2-dimethylaminotrimethylene) bis (thiocarbamate)], thiocyclam [N, N-dimethyl-1,
Nereistoxin derivatives such as 2,3-trithian-5-ylamine] and bensultap [S, S'-2-dimethylaminotrimethylene di (benzenethiosulfonate)], N-cyano-N'-methyl-N N-cyanoamidine derivatives such as'-(6-chloro-3-pyridylmethyl) acetamidine; endosulfan [6,7,8,9,
10,10-hexachloro-1,5,5a, 6,9,9
a-hexahydro-6,9-methano-2,4,3-benzodioxathiepine oxide], γ-BHC [1,
2,3,4,5,6-hexachlorocyclohexane],
Dicophor [1,1-bis (4-chlorophenyl) -2,
Chlorinated hydrocarbon compounds such as 2,2-trichloroethanol] and chlorofluazulone [1- {3,5-dichloro-
4- (3-chloro-5-trifluoromethylpyridine-
2-yloxy) phenyl {-3- (2,6-difluorobenzoyl) urea], teflubenzuron [1-
(3,5-dichloro-2,4-difluorophenyl)-
3- (2,6-difluorobenzoyl) urea], flufenoxuron [1- {4- (2-chloro-4-trifluoromethylphenoxy) -2-fluorophenyl}-
Benzoylphenylurea-based compounds such as 3- (2,6-difluorobenzoyl) urea], amitraz [N,
N '-{(methylimino) dimethylidine} -di-2,4
-Xylidine], formamidine derivatives such as chlordimeform [N '-(4-chloro-2-methylphenyl) -N, N-dimethylmethinimidamide], diafenthiuron [N- (2,6-diisopropyl-4) -Phenoxyphenyl) -N'-t-butylcarbodiimide], N-phenylpyrazole compounds,

Methoxadiazone [5-methoxy-3-
(2-methoxyphenyl) -1,3,4-oxadiazol-2- (3H) -one], bromopropylate [isopropyl 4,4'-dibromobenzylate], tetradiphone [4-chlorophenyl 2,4, 5-trichlorophenyl sulfone], quinomethionate [S, S-6-
Methylquinoxaline-2,3-diyldithiocarbonate], propargite [2- (4-tert-butylphenoxy) cyclohexylprop-2-ylsulfite], fenbutatin oxide [bis [tris (2-
Methyl-2-phenylpropyl) tin peroxide],
Hexythiazox [(4RS, 5RS) -5- (4-chlorophenyl) -N-chlorohexyl-4-methyl-2
-Oxo-1,3-thiazolidine-3-carboxamide], clofentezine [3,6-bis (2-chlorophenyl) -1,2,4,5-tetrazine], pyridaben [2-tert-butyl-5- (4-tert-butylbenzylthio) -4-chloropyridazine-3 (2H)-
On], fenpyroximate [tert-butyl]
(E) -4-[(1,3-dimethyl-5-phenoxypyrazol-4-yl) methyleneaminooxymethyl] benzoate], debufenpyrad [N-4-tert-
Butylbenzyl) -4-chloro-3-ethyl-1-methyl-5-pyrazolecarboxamide], polynactin complex [tetranactin, dinactin, trinactin], pyrimidifen [5-chloro-N- [2- ｛4]
-(2-ethoxyethyl) -2,3-dimethylphenoxydiethyl] -6-ethylpyrimidin-4-amine],
Milbemectin, Abamectin, Ivermectin, Azadirachtin [AZAD], 5-Methyl [1,2,4] triazolo [3,4-b] benzothiazole, Methyl 1
-(Butylcarbamoyl) benzimidazole-2-carbamate, 6- (3,5-dichloro-4-methylphenyl) -3 (2H) -pyridazinone, 1- (4-chlorophenoxy) -3,3-dimethyl-1 − (1H-1,
2,4-triazol-1-yl) butanone, (E)-
4-chloro-2- (trifluoromethyl) -N- [1-
(Imidazol-1-yl) -2-propoxyethylidene] aniline, 1- [N-propyl-N- [2- (2,
4,6-trichlorophenoxy) ethyl] carbamoyl] imidazole, (E) -1- (4-chlorophenyl) -4,4-dimethyl-2- (1H-1,2,4-triazol-1-yl) -1 -Penten-3-ol,
1- (4-chlorophenyl) -4,4-dimethyl-2-
(1H-1,2,4-triazol-1-yl) pentan-3-ol, (E) -1- (2,4-dichlorophenyl) -4,4-dimethyl-2- (1H-1,2,2 4-
Triazol-1-yl) -1-penten-3-ol, 1- (2,4-dichlorophenyl) -4,4-dimethyl-2- (1H-1,2,4-triazol-1-yl) pentane- 3-ol, 4- [3- (4-tert-butylphenyl) -2-methylpropyl] -2,6-dimethylmorpholine, 2- (2,4-dichlorophenyl)-
1- (1H-1,2,4-triazol-1-yl) hexan-2-ol, O, O-diethyl O-2-quinoxalinyl phosphorothioate, O- (6-ethoxy-
2-ethyl-4-pyrimidinyl) O, O-dimethyl phosphorothioate, 2-diethylamino-5,6-dimethylpyrimidin-4-yl dimethylcarbamate, 4
-(2,4-dichlorobenzoyl) -1,3-dimethyl-5-pyrazolyl p-toluenesulfonate, 4-amino-6- (1,1-dimethylethyl) -3-methylthio-1,2,4- Triazine-5 (4H) -one, 2-
Chloro-N-[(4-methoxy-6-methyl-1,3,3
5-triazin-2-yl) aminocarbonyl] benzenesulfonamide, 2-methoxycarbonyl-N-
[(4,6-dimethoxypyrimidin-2-yl) aminocarbonyl] benzenesulfonamide, 2-methoxycarbonyl-N-[(4,6-dimethylpyrimidine-2-yl)
Yl) aminocarbonyl] benzenesulfonamide, 2
-Methoxycarbonyl-N-[(4-methoxy-6-methyl-1,3,5-triazin-2-yl) aminocarbonyl] benzenesulfonamide, 2-ethoxycarbonyl-N-[(4-chloro-6- Methoxypyrimidine-
2-yl) aminocarbonyl] benzenesulfonamide, 2- (2-chloroethoxy) -N-[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)
Aminocarbonyl] benzenesulfonamide, 2-methoxycarbonyl-N-[(4,6-dimethoxypyrimidin-2-yl) aminocarbonyl] phenylmethanesulfonamide, 2-methoxycarbonyl-N-[(4-methoxy-6- Methyl-1,3,5-triazin-2-yl) aminocarbonyl] thiophen-3-sulfonamide, 4-ethoxycarbonyl-N-[(4,6-dimethoxypyrimidin-2-yl) aminocarbonyl] -1-
Methylpyrazole-5-sulfonamide, 2- [4,5
-Dihydro-4-methyl-4- (1-methylethyl)-
5-oxo-1H-imidazol-2-yl] -3-quinolinecarboxylic acid, 2- [4,5-dihydro-4-methyl-4- (1-methylethyl) -5-oxo-1H-imidazole-2 -Yl] -5-ethyl-3-pyridinecarboxylic acid, methyl 6- (4-isopropyl-4-methyl-5-oxoimidazolin-2-yl) -m-toluate, methyl 2- (4-isopropyl-4- Methyl-
5-oxoimidazolin-2-yl) -p-toluate, 2- (4-isopropyl-4-methyl-5-oxoimidazolin-2-yl) nicotinic acid, N- (4-chlorophenyl) methyl-N-cyclopentyl- N'-phenylurea, (RS) -2-cyano-N-[(R) -1
(2,4-dichlorophenyl) ethyl] -3,3-dimethylbutylamide, N- (1,3-dihydro-1,1,1)
3-trimethylisobenzofuran-4-yl) -5-chloro-1,3-dimethylpyrazole-4-carboxamide, N- [2,6-dibromo-4- (trifluoromethoxy) phenyl] -2-methyl- 4- (trifluoromethyl) -5-thiazolcarboxamide, 2,2-
Dichloro-N- [1- (4-chlorophenyl) ethyl]
-3-methylcyclopropanecarboxamide, methyl (E) -2--2-6- (2-cyanophenoxy) pyrimidin-4-yloxy-phenyl-3-methoxyacrylate, 5-methyl-1,2,4- Triazolo [3,4
-B] benzothiazole, 3-allyloxy-1,2-
Benzoisothiazole-1,1-dioxide, diisopropyl = 1,3-dithiolan-2-ylidene-malonate, O, O-dipropyl-O-4-methylthiophenyl phosphate and the like.

The pesticidal active ingredient is contained in the composition of the present invention.
Species may be contained, or two or more kinds may be contained. The content of the pesticidal active ingredient is usually 0.1 to 90% by weight, preferably 0.2 to 90% by weight based on the composition of the present invention.
７０70% by weight. The pesticidal active ingredient may be dispersed throughout the inner core, or may be located inside the inner core or on the inner core surface.

The water-soluble polymer used in the present invention includes, for example, acrylic polymers, vinyl polymers,
Semi-synthetic polymers such as synthetic polymers such as polyoxyalkylenes, cellulose derivatives, processed starch, and lignin derivatives,
And natural polymers. Examples of the acrylic polymer include sodium polyacrylate and sodium polymethacrylate, and examples of the vinyl polymer include polyvinyl alcohol, polyvinyl pyrrolidone, and vinyl acetate copolymer. Examples of the polyoxyalkylene include polyoxyethylene and polyoxypropylene. Cellulose derivatives include sodium carboxymethylcellulose, dextrin, hydroxypropylmethylcellulose, methylcellulose, methylethylcellulose, hydroxypropylcellulose, and the like, and modified starches include modified starch, carboxymethylstarch, and soluble starch. Examples of the lignin derivative include sodium lignin sulfonate. Examples of the natural polymer include polysaccharides such as gum arabic, xanthan gum, tragacanth, guar gum, carrageenan, alginic acid, sodium alginate, and proteins such as casein, casein lime, gelatin, and collagen.

In the present invention, among the water-soluble polymers, polyvinyl alcohol, sodium carboxymethylcellulose and sodium ligninsulfonate are particularly preferably used. The molecular weight of the water-soluble polymer is usually 500
0 to 300,000, preferably 10,000 to 50,000
It is. The water-soluble polymer used in the composition of the present invention has a viscosity of 4% aqueous solution at 20 ° C. of 3%.
Those having 30 centipoise are preferred.

The content of the water-soluble polymer is usually 0.1 to 10% by weight, preferably 0.5 to 5% by weight based on the composition of the present invention.
% By weight.

Examples of the solid carrier used in the present invention include a mineral carrier, a vegetable carrier, a synthetic carrier and the like.

As the mineral carrier, for example, kaolin minerals such as kaolinite, dickanite, nacrite and halosite, serpentine such as chrysotile, lizatite, antichorite and amesite, sodium montmorillonite, calcium montmorillonite, magnesium montmorillonite and the like can be used. Montmorillonite minerals, saponite, hectorite, sauconite, hyderite, etc., smectites, pyrophyllites, talc, waxite, muscovite, fengite, sericite, illite, etc. silica, cristobalite, quartz, etc. silica, attapulgite, sepiolite, etc. Calcium carbonate such as hydrous magnesium silicate, dolomite, calcium carbonate fine powder, sulfate minerals such as gypsum and gypsum, zeolite, zeolite, tuff, vermiculite, rapo Ito, pumice, diatomaceous earth, acid clay, etc. activated clay and the like. Examples of the vegetable carrier include cellulose, chaff, flour, wood flour, starch, bran, bran, soy flour, and the like. Examples of the synthetic carrier include wet-process silica, dry-process silica, calcined products of wet-process silica, surface-modified silica, and modified starch (Pineflow, manufactured by Matsutani Chemical).

The content of these solid carriers is
Usually 0.5 to 99.9% by weight, preferably 25 to 99.
5% by weight is contained. In the present invention, among these solid carriers, those having a low oil absorption rate, specifically, those having an oil absorption rate of 5
A solid support of 0 or less is preferably used, and a solid support of 30 or less is more preferably used. Examples of such suitable solid carriers include kaolin (oil absorption rate 32 to 45), talc (oil absorption rate 30 to 50), calcium carbonate (oil absorption rate 16 to 45).
To 30), among which calcium carbonate is particularly preferred.

The oil absorption of the solid carrier is determined according to JIS K-5101.
Can be measured by the method described in (1).

The average particle diameter of the solid carrier used in the present invention is usually 100 μm or less, and a solid carrier having an average particle diameter of 2 to 30 μm is preferred from the viewpoint of low oil absorption. Further, when the inner core is manufactured by the extrusion granulation method, it is preferable to use a montmorillonite mineral as a solid carrier because damage to an extrusion net during granulation can be reduced, and it is preferable to use a montmorillonite mineral and another solid carrier in combination. More preferred.

When the montmorillonite mineral is used in combination with another solid carrier, the content of the montmorillonite mineral is usually 2.5 to 30% by weight, preferably 5 to 20% by weight, based on the inner core.
%, And the total amount of the solid carrier is usually 0.5 to 99.9% by weight, preferably 25 to 99.5% by weight, based on the inner core.

The inner core of the composition of the present invention comprises an agricultural chemical active ingredient, a solid carrier, and a water-soluble polymer.
If necessary, surfactants, solvents, stabilizers, colorants,
It may contain a fragrance or the like.

Examples of the surfactant that can be used include, for example,
Polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene lanolin alcohol, polyoxyethylene alkylphenol formalin condensate, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene glyceryl monofatty acid ester, polyoxypropylene glycol monofatty acid ester, Polyoxyethylene sorbitol fatty acid ester, polyoxyethylene castor oil derivative, polyoxyethylene fatty acid ester, higher fatty acid glycerin ester, sorbitan fatty acid ester, sucrose fatty acid ester, polyoxyethylene polyoxypropylene block polymer, polyoxyethylene fatty acid amide, alkyl Nonionic surface activity such as roll amide and polyoxyethylene alkylamine Alkyl quaternary ammonium salts such as alkylamine hydrochloride such as dodecylamine hydrochloride, dodecyltrimethylammonium salt, alkyldimethylbenzylammonium salt, alkylpyridinium salt, alkylisoquinolinium salt and dialkylmorpholinium salt; benzethonium chloride; Cationic surfactants such as polyalkylvinylpyridinium salts; higher fatty acids such as sodium fatty acids such as sodium palmitate, sodium ether carboxylate such as sodium polyoxyethylene lauryl ether carboxylate, sodium lauroyl sarcosine and sodium N-lauroyl glutamate; Amino acid condensate, higher alkyl sulfonate,
Higher fatty acid ester sulfonates such as lauric acid ester sulfonates, dialkyl sulfosuccinates such as dioctyl sulfosuccinate, higher fatty acid amide sulfonates such as oleic amide sulfonic acid, sodium dodecylbenzene sulfonate, diisopropyl naphthalene sulfonic acid Alkylaryl sulfonates such as salts, formalin condensates of alkylaryl sulfonates, higher alcohol sulfates such as pentadecane-2-sulfate, polyoxyethylene alkyl phosphates such as dipolyoxyethylene dodecyl ether phosphate, Anionic surfactants such as styrene-maleic acid copolymer; N-laurylalanine, N, N,
Amphoteric surfactants such as N-trimethylaminopropionic acid, N, N, N-trihydroxyethylaminopropionic acid, N-hexyl-N, N-dimethylaminoacetic acid, 1- (2-carboxyethyl) pyrimidinium betaine, lecithin Agents and the like. The content of the surfactant used in the present invention is usually 0.1 to
It is 40% by weight, preferably 0.1 to 10% by weight.

Examples of the solvent that can be used in the present invention include hexane, decane, tridecane, hexadecane,
Saturated aliphatic hydrocarbons such as octadecane; unsaturated hydrocarbons such as 1-undecene and 1-heneicosene; halogen hydrocarbons such as selecrol S45 (trade name, solvent manufactured by ICI); ketones such as methyl ethyl ketone and cyclohexanone; , Butanol, alcohols such as octanol, ethyl acetate, dimethyl phthalate,
Esters such as methyl laurate, ethyl palmitate, octyl acetate, dioctyl succinate, didecyl adipate, xylene, ethylbenzene, octadecylbenzene, Solvesso 100 (trade name, solvent manufactured by Exxon Chemical), dodecylnaphthalene, tridecylnaphthalene, solvesso Alkyl naphthalenes such as 200 (trade name, solvent manufactured by Exxon Chemical), glycols such as ethylene glycol and diethylene glycol, glycol ethers such as propylene glycol monomethyl ether and ethylene glycol monoethyl ether, oleic acid, capric acid, and enanthic acid Fatty acids, acid amides such as N, N-dimethylformamide, N, N-diethylformamide, olive oil, soybean oil, rapeseed oil, castor oil,
Animal and vegetable oils such as linseed oil, cottonseed oil, palm oil, avocado oil, shark liver oil, mineral oils such as machine oil, glycerin, and glycerin derivatives such as glycerin fatty acid ester. The content of the solvent is usually 3 to the composition of the present invention.
0% by weight or less, preferably 0.1 to 20% by weight.

Examples of the stabilizers usable in the present invention include phenolic antioxidants, amine antioxidants, phosphorus antioxidants, sulfur antioxidants, ultraviolet absorbers, epoxidized soybean oil, Examples include epoxidized vegetable oils such as epoxidized linseed oil and epoxidized rapeseed oil, isopropyl acid phosphate, liquid paraffin, and ethylene glycol. The content of the stabilizer is usually 0.01 to 10% by weight, preferably 0.0 to 10% by weight based on the composition of the present invention.
1 to 5% by weight.

Examples of the coloring agent that can be used in the present invention include rhodamines such as rhodamine B and solar rhodamine, and dyes such as yellow No. 4, blue No. 1 and red No. 2. , Ethyl acetoacetate, ethyl enanthate, ethyl cinnamate, ester flavors such as isoamyl acetate, caproic acid, organic acid flavors such as cinnamic acid, cinnamon alcohol, geraniol, citral,
Alcohol-based flavors such as decyl alcohol, aldehydes such as vanillin, piperonal, and perylaldehyde; maltitol, and ketone-based flavors such as methyl β-naphthyl ketone;
Menthol and the like. The content of the coloring agent and the flavor is usually 0.01 to 5% by weight based on the composition of the present invention.

The inner core of the composition of the present invention can be obtained, for example, by granulation by a granulation method usually used in the preparation of agricultural chemicals. Examples of the granulation method include an extrusion granulation method, a compression granulation method, a stirring granulation method, a fluidized bed granulation method, a fluidized bed granulation method, a tumbling granulation method, and a coated granulation method. Among them, the extrusion granulation method is preferable. An example is shown below.

A mixture is prepared by mixing the pesticidal active ingredient and the solid carrier, and if necessary, a water-soluble polymer, a surfactant, a solvent, a stabilizer, a coloring agent, a fragrance and the like. Examples of the mixer used at this time include a ribbon mixer, a Nauta mixer, a Sugi mixer, a Henschel mixer, a Redige mixer, and the like. Next, water and / or an aqueous solution of a water-soluble polymer are dropped, sprayed, or sprayed on the mixture, and kneaded to prepare a kneaded product. The addition of the water-soluble polymer is performed at least during the preparation of the mixture or the preparation of the kneaded material. Examples of the kneader used for preparing the kneaded material include a Nauter mixer, a ribbon mixer, a Henschel mixer, and a kneader. Among them, the kneader is particularly preferable because it has a large kneading power and produces an inner core having a lower oil absorption rate. In addition, if the kneading time is lengthened, the oil absorption of the inner core tends to decrease.
When the aqueous solution of the water-soluble polymer is added in the kneading, the concentration of the aqueous solution of the water-soluble polymer varies depending on the water-soluble polymer used, but is usually 5 to 85% by weight, preferably 20 to 70% by weight. is there. The amount of water used for kneading is usually 5 to 35% by weight, preferably 10 to 25% by weight, based on the total weight of the added water and / or aqueous solution of the water-soluble polymer, relative to the inner core weight. %. Next, the kneaded product is granulated using a granulator to prepare a granulated product. Examples of the granulator used at this time include, for example, an extrusion granulator such as a basket granulator, a screw granulator, a pelletizer, a compression granulator such as a roller compactor, a Henschel mixer, and a Nauter mixer. Granulator,
A rolling granulator such as a pan granulator, a fluidized bed granulator and the like can be mentioned. Among them, a screw-type extrusion granulator has a high pressure during granulation and is suitable for producing an inner core having a lower oil absorption. Among the screw-type extrusion granulators, the horizontal extrusion type is preferable. The inner core in the present invention is obtained by subjecting the obtained granules to ordinary drying, sizing, and sieving processes. Examples of the dryer used at this time include a fluidized-bed dryer and a bed-type dryer. Examples of the sizing machine include a marmelizer, a pin mill, and a crusher, and examples of the sieving machine include a gyro shifter and an electromagnetic vibration sieving machine.

The oil absorption of the core thus produced is 20 or less as described above, but the oil absorption of the core obtained is 2 or less.
If it exceeds 0, for example, the oil absorption of the solid carrier is reduced (change to a solid carrier having a lower oil absorption or an increase in the addition ratio of the solid carrier having a lower oil absorption), and the amount of the water-soluble polymer added. Increase of kneading conditions (use of kneader with higher kneading power, extension of kneading time, etc.), strengthening of granulation conditions (use of granulator with higher pressure, increase of number of times of granulation, etc.), etc. By applying the above method to the initial prescription, the oil absorption of the inner core can be set to an intended value range (20 or less).

The average particle size of the inner core is generally 0.1 to 5 m.
m, preferably about 0.5 to 3 mm. In addition,
The particle diameter in the present invention means the maximum diameter of the inner core.

The content of the coating layer in the composition of the present invention is as follows:
Usually, it is 0.1 to 50% by weight, preferably 0.2 to 15% by weight.

In the composition of the present invention, when the percentage of the coating layer weight with respect to the weight of the core in the composition of the present invention is defined as the coating rate, the ratio of the coating rate (%) to the oil absorption (%) of the core is 0.1 to 0.1%. 10, more preferably 0.2 to 3.

The coating layer used in the composition of the present invention is mainly composed of a film-forming substance, and if necessary, a water-soluble polymer, a solid carrier, a surfactant, a solvent, a stabilizer, a coloring agent, a fragrance, etc. Is contained.

Examples of the film-forming substance include wax, thermoplastic resin, thermosetting resin, sulfur and the like. Examples of the wax include synthetic waxes such as carbowax, next wax, sucrose ester and fatty acid ester, natural waxes such as carnauba wax, beeswax and wood wax, and petroleum waxes such as paraffin wax and petrolactam.

Examples of the thermoplastic resin include polyolefins such as polyethylene, polypropylene, polybutene, and polystyrene, polyvinyl acetate, polyvinyl chloride, and the like.
Vinyl polymers such as polyvinylidene chloride, polyacrylic acid, polymethacrylic acid, polyacrylate and polymethacrylate, butadiene polymer, isoprene polymer, chloroprene polymer, butadiene-styrene copolymer, ethylene-propylene -Diene copolymers, diene polymers such as styrene-isoprene copolymers, ethylene-propylene copolymers, butene-ethylene copolymers, butene-propylene copolymers, ethylene-vinyl acetate copolymers, ethylene- Polyolefin copolymers such as acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-methacrylic acid ester copolymer, ethylene-carbon monoxide copolymer, ethylene-vinyl acetate-carbon monoxide copolymer Products, vinyl chloride-vinyl acetate copolymers, vinyl chloride Down - and vinyl copolymers chloride such as vinyl chloride copolymer is.

Examples of the thermosetting resin include urethane resin, epoxy resin, alkyd resin, unsaturated polyester resin, phenol resin, urea / melamine resin, urea resin, and silicone resin.

The urethane resin is produced by reacting a polyisocyanate and a polyol in the presence of a curing agent such as an organic metal or an amine. As the curing agent,
Organic metals such as dibutyltin diacetate, dibutyltin dichloride, dibutyltin dilaurate, dibutylthiostannic acid, stannous octylate, di-n-octyltin dilaurate, triethylenediamine, N-methylmorpholine,
N, N-dimethyldidodecylamine, N-dodecylmorpholine, N, N-dimethylcyclohexylamine, N-
Ethylmorpholine, dimethylethanolamine, N, N
-Dimethylbenzylamine, 1,8-diazabicyclo [5.4.0] undec-7-ene, isopropyl titanate, tetrabutyl titanate, oxyisopropyl vanadate, n-propyl zirconate, 1,4-diazabicyclo [2.2 .2] octane and the like. The polyisocyanate and the polyol which are monomers of the urethane resin are used in the form of a monomer alone, a solution, an aqueous emulsion or an organic solvent emulsion.
Examples of the polyisocyanate include toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), naphthalene diisocyanate, tolylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, xylylene diisocyanate, 4,4-methylene bis (cyclohexyl isocyanate), and trimethylhexamethylene. Examples thereof include diisocyanate, 1,3- (isocyanatomethyl) cyclohexane, triphenylmethane triisocyanate, and tris (isocyanatephenyl) thiophosphate. The polyisocyanate may be a mixture of two or more. Further, instead of the polyisocyanate, a modified form of the polyisocyanate or an oligomer of the polyisocyanate can be used. Examples of the modified form include an adduct modified form, a biuret modified form, an isocyanurate modified form, a block modified form, a prepolymer modified form, a dimerized modified form and the like. As the polyol, a condensation polyester polyol, a polyether polyol, a polyacrylic acid polyol, a lactone polyester polyol, a polycarbonate polyol, a natural polyol or the like, or a modified product of the polyol is used.

The condensation polyester polyol is usually
A polyether polyol is usually obtained by a polymerization reaction of a cyclic oxide by a condensation reaction between a polyol and a dibasic acid. Poly (meth) acrylic acid polyol is
Usually, it is obtained by a condensation reaction between poly (meth) acrylic acid and polyol, a condensation reaction between (meth) acrylic acid and polyol, or a polymerization reaction of (meth) acrylate monomer. The lactone-based polyester polyol is usually obtained by ring-opening polymerization of ε-caprolactam using a polyhydric alcohol as an initiator. The polycarbonate polyol is obtained by reacting a polyol with a carbonate such as diphenyl carbonate.The polyol used in this case is usually methylene glycol, ethylene glycol, propylene glycol, tetramethylene glycol, hexamethylenediol, trimethylolpropane, polymethyl Tetramethylene glycol, glycerin, pentaerythritol, sorbitol, sucrose, etc.
Alternatively, these oligomers and the like can be mentioned. Examples of the dibasic acid include adipic acid and phthalic acid. Such polyols are commercially available and include, for example, Sumiphen 3086, Sumiphen 3900, Sumiphen 5200, Sumiphen TS, Sumiphen TM, Sumiphen VN, SBU polyol 0248, SBU polyol 0363, SBU polyol 0474, SBU polyol 480J, SBU polyol 0480, SB
U polyol 0485, SBU polyol 0487,
SBU polyol 0248, SBU polyol 036
3. SBU polyol 0262, Desmophen 550
U, desmophen 900U, desmophen 1600U,
Desmophen 1900U (all are trade names of Sumitomo Bayer Urethane Co., Ltd.) and the like.

Epoxy resins can be reacted with phenols or alcohols and epichlorohydrin in the presence of a curing agent, with carboxylic acids and epichlorohydrin in the presence of a curing agent, amines in the presence of a curing agent, It is formed by the reaction of cyanuric acid or hydantoin with epichlorohydrin, the reaction of an aliphatic cyclic epoxy compound in the presence of a curing agent such as peracetic acid, and the like. Examples of the curing agent include diethylenetriamine, triethylenetetramine, metaxylylenediamine, isophoronediamine, 1,3-bisaminomethylcyclohexane, diaminodiphenylmethane,
1,3-bisaminomethylcyclohexane, diaminodiphenylmethane, m-phenylenediamine, diaminodiphenylsulfone, dicysandiamide, organic acid dihydrazide, polyamide-modified polyamine, ketone-modified polyamine, epoxy-modified polyamine, thiourea-modified polyamine, Mannich-modified polyamine, Michael addition Modified polyamine, dodecenyl succinic anhydride, polyazeleic anhydride, hexahydrophthalic anhydride, methyltetrahydrophthalic anhydride, methylnadic anhydride, trimetic anhydride, pyromellitic anhydride, benzophenonetetracarboxylic acid, tetrabromophthalic anhydride, anhydride Het acid, novolak type polyphenol, polymercaptan, polyisocyanate, carboxylic acid-containing polyester resin, benzyldimethylaniline 2,4,6-trisdimethylaminomethylphenol, 2-methylimidazole, 2-ethyl, 4-methyl-imidazole, 2-heptadecylimidazole, aromatic sulfonium salt, aromatic diazonium salt, resole type phenol resin, methylol group containing Examples include urea resins and methylol group-containing melamine resins.

The resulting epoxy resins include bisphenol A type, bisphenol F type, brominated bisphenol A type, hydrogenated bisphenol A type, bisphenol S
Glycidyl ether type epoxy resin such as phenol type, bisphenol AF type, biphenyl type, naphthalene type, fluorin type, phenol novolak type, orthocresol novolak type, DPP novolak type, trishydroxyphenylmethane type, tetraphenylolethane type, etc., tetraglycidyl Examples include glycidylamine type epoxy resins such as diaminodiphenylmethane type, triglycidyl isocyanurate type, hydantoin type, aminophenol type, aniline type, and toluidine type, glycidylamine type epoxy resins, alicyclic epoxy resins, and the like.

The alkyd resin is formed by a reaction between a polybasic acid and a polyhydric alcohol, if necessary, in the presence of a denaturing agent such as a natural vegetable oil or animal fat, a metal soap and an anti-skinning agent. Examples of the polybasic acid include phthalic anhydride and maleic anhydride, and examples of the polyhydric alcohol include pentaerythol and glycerin. Examples of the denaturing agent include soybean oil, linseed oil, tung oil, safflower oil, coconut oil, palm oil, dehydrated castor oil and the like,
Examples of the metal soap include naphthenes or octylic acids such as manganese, cobalt, zirconium, nickel, iron, and lead, such as zirconium octylate, manganese naphthenate, and cobalt octylate, and mixtures thereof. . As the anti-skinning agent, usually,
Examples include dipentene, methoxyphenol, cyclohexanone oxime, methyl ethyl ketone oxime and the like, or a mixture thereof.

The unsaturated polyester resin is produced by reacting an unsaturated dibasic acid and a dihydric alcohol in the presence of a vinyl monomer. Examples of the unsaturated dibasic acid include phthalic anhydride, isophthalic acid, terephthalic acid, succinic acid, adipic acid, azelaic acid, sebacic acid, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, tetrabromophthalic anhydride, tetrachlorophthalic anhydride. acid,
Examples of such dihydric alcohols include ethylene glycol, propylene glycol, 1,3-butylene glycol, 1,6-hexanediol, diethylene glycol, dipropylene glycol, and neopentyl. Glycol, triethylene glycol, hydrogenated bisphenol A, bisphenol dihydroxypropyl ether and the like. As the vinyl monomer, styrene,
Vinyl toluene, chlorostyrene, diallyl phthalate,
Triallyl cyanurate, methyl methacrylate and the like.

The phenol resin is formed by reacting a phenol with an aldehyde in the presence of a catalyst such as hydrochloric acid, oxalic acid, hexamethylenetetramine and the like. The phenols include phenol, o-cresol,
m-cresol, p-cresol, xylenol, p-
tert-butylphenol, resorcinol and the like. In this reaction, a novolak-type phenol resin is obtained under an acidic catalyst, and a resol-type phenol resin is obtained under a basic catalyst.

The urea-melamine resin is formed by reacting urea or melamine with formalin in the presence of a basic catalyst. Silicon resin is formed by the reaction between silicon and a polyfunctional siloxane in the presence of a catalyst.

The film-forming material used for the coating layer in the present invention is preferably a thermosetting resin such as a polyurethane resin or an epoxy resin from the viewpoint of the ease of handling of the monomer and the conditions of the curing reaction. Is more preferred.

Solid carrier, surfactant, solvent, stabilizer,
As the coloring agent and the fragrance, those described in the section of the inner core can be similarly used.

The composition of the present invention can be obtained by coating the inner core with a coating layer. As a method of coating with a coating layer, for example, a film forming material is dissolved or dispersed in a solvent, and the solution is added to an inner core moving in a rotating pan, a rotating drum, a fluidized bed, a fluidized bed, or the like, and simultaneously heated with hot air. A method of drying and forming a coating layer to form and grow a coating to a predetermined coverage (coating drying method),
While adding to the inner core moving with a rotating pan, rotating drum, stirring mixer, etc., if necessary, while heating or cooling, add a catalyst as needed, cure the raw material of the film forming material and coat A method in which a layer is formed and grown to cover a predetermined coverage (film hardening method), and the like. Of these coating methods, the coating drying method is often used when coating a thermoplastic resin, and the coating curing method is often used when coating a thermosetting resin. In coating with wax or sulfur, both a coating drying method and a coating curing method are applied. In addition, when coating the inner core, if a large amount of the film forming material is added to the moving inner core at a time, the film forming material tends to become spine-like in the process of forming the coating layer, and the inner core is likely to be agglomerated. Therefore, it is preferable to add the film forming material intermittently in small units.

The average particle size of the particles composed of the inner core and the coating layer in the composition of the present invention is generally about 0.1 to 5 mm, preferably about 0.5 to 3 mm.

The composition of the present invention may be used, for example, in agricultural fields such as paddy fields, dry fields, nursery boxes, fields, orchards, mulberry fields, greenhouses, open fields, forests, lawns, etc. It can be used in non-cultivated lands such as golf courses, street trees, roads, roadsides, and wetlands, ponds, reservoirs, rivers, waterways, and sewers. In using the composition of the present invention,
The composition of the present invention can be applied alone, or other agents depending on the use as appropriate, such as other pesticide granules, granular fertilizer,
Granular soil, granular plant nutrients, granular plant preparation control agents, granular hormonal agents, and granular agricultural materials such as seeds can also be used in combination.

The composition of the present invention can be applied by a method in which pesticides are generally applied, for example, a method of directly spraying by hand, a baggage type granulator, a pipe granulator, an aerial granulator. Power granulator, seedling box granulator, tractor-mounted granulator, multi-mouth hose granulator, rice transplanter equipped with a granulator, and the like.

When the composition of the present invention is applied, it is preferably used in a situation where the sustained-release performance of the composition of the present invention can be utilized. For example, nursery box application, rice planting application, seedling application, sowing application, germination application, etc., such as application earlier than the time when the normal pesticide is applied, are suitable from the viewpoint of the properties of the composition of the present invention. . When the composition of the present invention is used in a nursery box, the application rate is set in a nursery box (usually 0.16 m ² in area).
About) 10 to 200 g, preferably 2 per sheet
The amount is 5 to 100 g, and examples of the application method at that time include a method of directly applying by hand or a method of applying using a granulator for a nursery box. When the composition of the present invention containing urea as the water-soluble substance is applied to a nursery box, the content of urea is preferably 3 to 20% in the composition of the present invention.

When the composition of the present invention is used in paddy fields or upland fields, the application rate is usually 0.1 to 10 kg, preferably 0.25 to 5 kg per 10 ares. Is a method of spraying directly by hand, a hand-held type granulator, a pipe granulator, an aerial granulator, a multi-hose granulator, a rice transplanter equipped with a granulator, and a tiller equipped with a granulator And the like.

[0056]

Next, the present invention will be specifically described with reference to production examples and test examples. Production Example 1 (1) N- (1,1,3-trimethyl-2-oxa-4
-Indanyl) -5-chloro-1,3-dimethylpyrazole-4-carboxamide 4 parts by weight and 0.8 parts by weight of hydrous silicon dioxide were thoroughly mixed with a juice mixer,
It was pulverized with a pin mill. The average particle size of the obtained pulverized product was 6.4 μm (measured value by Coulter counter TA-II). 4.8 parts by weight of the pulverized product obtained above, 4 parts by weight of polyvinyl alcohol, and fine calcium carbonate powder (average particle diameter: 14.8 μm, oil absorption: 16) 91.2
After the weight parts were mixed well with a juice mixer, the mixture was transferred to a mortar, water was added and kneaded well. 0.9 of the obtained kneaded material
Granulate with a small extrusion granulator with a screen of mmφ,
After sieving, dried at 60 ° C. for 15 minutes,
An inner core of 0 to 850 μm was obtained. The resulting core had an oil absorption of 6. (2) 1000 parts by weight of the obtained core was rotated in a temperature-controllable inclined pan-type rolling granulator equipped with a hot air generator, and the polymer MDI 35.9 was maintained at 80 ° C.
%, Branched polyether polyol 31.3% by weight, linear polyether polyol 31.3% by weight,
5 g of a mixture consisting of 1.5% by weight of 4,6-tris (dimethylaminomethyl) phenol (hereinafter referred to as mixture A) was added, and the mixture was kept at 80 ° C. for 5 minutes. Mixture A
The addition and the operation of maintaining the temperature at 80 ° C. for 5 minutes were repeated 10 times, and finally, the temperature was maintained at 80 ° C. for 10 minutes to obtain a granular pesticide composition (1). The coverage of the granular pesticide composition (1) was 5, and the coverage / oil absorption of the inner core was 0.8.

Production Example 2 (1) Production except that the amount of polyvinyl alcohol was 2 parts by weight and the amount of calcium carbonate fine powder (average particle diameter: 14.8 μm, oil absorption: 16) was 93.2 parts by weight. Example 1
The same experiment as in (1) was performed, and the particle size was 1400 to 850 μm.
Got the inner core. The oil absorption of the inner core was 12. (2) Production Example 1 (2) using 1,000 parts by weight of the obtained inner core
The same experiment as described above was performed to obtain a granular pesticide composition (2). The coverage of the granular pesticide composition (2) was 5, and the coverage / oil absorption of the inner core was 0.4.

Production Example 3 (1) Instead of 4 parts by weight of polyvinyl alcohol, 4 parts by weight of polyvinyl alcohol and 1 part by weight of polyoxyethylene nonylphenyl ether were used, and fine powder of calcium carbonate (average particle diameter: 14.8 μm, oil absorption) The same experiment as in Production Example 1 (1) was carried out except that the amount of the ratio was changed to 90.2 parts by weight, and an inner core having a particle diameter of 1400 to 850 μm was obtained. The oil absorption of the inner core was 6. (2) Using 1000 parts by weight of the obtained core, mixture A5
Repeat the addition of parts by weight and the operation of maintaining at 80 ° C. for 5 minutes.
The same experiment as in Production Example 1 (2) was performed except that the number was changed to four times, to obtain a granular pesticide composition (3). The coverage of the granular pesticide composition (3) was 7, and the coverage / oil absorption of the inner core was 1.2.

Production Example 4 (1) The same experiment as in Production Example 3 (1) was carried out, and the particle size was 1400.
An inner core of ８850 μm was obtained. The oil absorption of the inner core was 6. (2) Using 1000 parts by weight of the obtained core, mixture A5
Repeat the addition of parts by weight and the operation of keeping at 80 ° C for 5 minutes.
The same experiment as in Production Example 3 (2) was performed except that the number was set to 0, and a granular pesticide composition (4) was obtained. The coverage of the granular pesticide composition (4) was 15, and the coverage / oil absorption of the inner core was 2.5.

Production Example 5 (1) The same experiment as in Production Example 3 (1) was carried out, and the particle size was 1400.
An inner core of ８850 μm was obtained. The oil absorption of the inner core was 6. (2) Using 1000 parts by weight of the obtained core, mixture A5
Repeat the addition of parts by weight and the operation of maintaining at 80 ° C for 5 minutes.
The same experiment as in Production Example 3 (2) was performed except that the number was changed to 0, and a granular pesticidal composition (5) was obtained. The coverage of the granular pesticidal composition (5) was 25, and the coverage / oil absorption of the inner core was 4.2.

Production Example 6 (1) Fine powder of calcium carbonate (average particle diameter: 14.8 μm)
m, oil absorption: 16) Instead of 91.2 parts by weight, calcium carbonate fine powder (average particle diameter: 14.8 μm, oil absorption: 1)
6) The same experiment as in Production Example 1 (1) was performed except that 86.2 parts by weight and 5 parts by weight of montmorillonite fine powder were used.
An inner core having a particle size of 1400 to 850 μm was obtained. The oil absorption of the inner core was 12. (2) Using 1000 parts by weight of the obtained core, mixture A5
Repeat the addition of parts by weight and the operation of maintaining at 80 ° C. for 5 minutes.
The same experiment as in Production Example 1 (2) was performed except that the number was changed to four times, to obtain a granular pesticide composition (6). The coverage of the granular pesticide composition (6) was 7, and the coverage / oil absorption of the inner core was 0.6.

Production Example 7 (1) The same experiment as in Production Example 6 (1) was carried out, and the particle size was 1400.
An inner core of ８850 μm was obtained. The oil absorption of the inner core was 12. (2) Using 1000 parts by weight of the obtained core, mixture A5
Repeat the addition of parts by weight and the operation of keeping the temperature at 80 ° C. for 5 minutes.
The same experiment as in Production Example 6 (2) was performed except for the number of rounds, and a granular pesticide composition (7) was produced. The coverage of the granular pesticidal composition (7) was 1, and the coverage / oil absorption of the inner core was 0.1.

Production Example 8 (1) The same experiment as in Production Example 6 (1) was carried out, and the particle size was 1400.
An inner core of ８850 μm was obtained. The oil absorption of the inner core was 12. (2) Using 1000 parts by weight of the obtained core, mixture A5
Repeat the addition of parts by weight and the operation of maintaining at 80 ° C. for 5 minutes.
The same experiment as in Production Example 6 (2) was performed except that the number of rounds was changed to produce a granular pesticide composition (8). The coverage of the obtained granular pesticide composition (8) was 3, and the coverage / oil absorption of the inner core =
0.3.

Production Example 9 (1) The amount of polyvinyl alcohol was 3 parts by weight, and instead of 86.2 parts by weight of fine calcium carbonate powder (average particle diameter: 14.8 μm, oil absorption: 16), fine calcium carbonate powder was used. (Average particle diameter: 7.41 μm, oil absorption: 17.5)
An experiment similar to that of Production Example 6 (1) is performed except that 87.2 parts by weight is used, and an inner core having a particle diameter of 1400 to 850 μm is obtained. (2) A mixture A5 was prepared using 1,000 parts by weight of the obtained core.
Repeat the addition of parts by weight and the operation of maintaining at 80 ° C. for 5 minutes.
An experiment similar to that of Production Example 6 (2) is performed except that the number is set to 0, to obtain a granular pesticide composition (9).

Production Example 10 (1) Except that the amount of montmorillonite mineral was 10 parts by weight and the amount of calcium carbonate fine powder (average particle diameter: 7.41 μm, oil absorption: 17.5) was 82.2 parts by weight. Performed the same experiment as in Production Example 9 (1), and the particle size was 1400 to 850.
A μm inner core is obtained. (2) Production Example 9 (2) using 1000 parts by weight of the obtained core
The same experiment as described above is performed to obtain a granular pesticide composition (10).

Production Example 11 (1) The amount of montmorillonite mineral was 20 parts by weight, and calcium carbonate fine powder (average particle size: 7.41 μm, oil absorption: 17.5) was replaced with 87.2 parts by weight of calcium carbonate. Fine powder (average particle size: 2.61 μm, oil absorption: 24)
An experiment similar to that of Production Example 9 (1) is performed except that 67.2 parts by weight is used, and an inner core having a particle diameter of 1400 to 850 μm is obtained. (2) Production Example 9 (2) using 1000 parts by weight of the obtained core
The same experiment as described above is performed to obtain a granular pesticide composition (11).

Production Example 12 (1) The amount of polyvinyl alcohol was 5 parts by weight, and calcium carbonate fine powder (average particle diameter: 7.41 μm, oil absorption: 17.5) was replaced by 91.2 parts by weight of calcium carbonate. Fine powder (average particle size: 5.56 μm, oil absorption; 18)
An experiment similar to that of Production Example 1 is performed except that 91.2 parts by weight is used, and an inner core having a particle diameter of 1400 to 850 μm is obtained. (2) Production example 1 (2) using 1,000 parts by weight of the obtained core
The same experiment as described above is performed to obtain a granular pesticide composition (12).

Comparative Production Example 1 (1) N- (1,1,3-trimethyl-2-oxa-4
-Indanyl) -5-chloro-1,3-dimethylpyrazole-4-carboxamide 4 parts by weight and 0.8 parts by weight of hydrous silicon dioxide were thoroughly mixed with a juice mixer,
It was pulverized with a pin mill. The average particle size of the obtained pulverized product was 6.4 μm (measured value by Coulter counter TA-II). 4.8 parts by weight of the ground material obtained above, 30 parts by weight of bentonite Fuji, 2 parts by weight of cellogen 7A, 2 parts by weight of sodium hexametaphosphate and kaolin clay 6
After 0.7 parts by weight was mixed well with a juice mixer, the mixture was transferred to a mortar, water was added and kneaded well. The obtained kneaded product was granulated by a small extrusion granulator with a screen of 0.9 mmφ, sized, and then dried at 60 ° C. for 15 minutes to obtain an inner core having a particle size of 1400 to 850 μm. Oil absorption rate of inner core is 3
It was 0. (2) Using 1000 parts by weight of the obtained core, mixture A5
Repeat the addition of parts by weight and the operation of maintaining at 80 ° C. for 5 minutes.
The same experiment as in Production Example 1 (2) was performed except that the number of times was four, and Comparative Composition (1) was produced.

Test Example 1 In a 500 ml beaker, 300 mg of each of the compositions (3) and (6) and the comparative composition (1) and 300 ml of third hard water were added.
And stirred gently. The water temperature was set at 25 ± 1 ° C., and after 1, 3, 7, 14, 21,... (Hereinafter every 7 days), 1 ml collected from the center of the beaker was analyzed by liquid chromatography, and the amount of the pesticide active ingredient was determined. Was determined by the following equation, and the number of days required for 50% of the active pesticide to elute was determined by interpolation. Table 1 shows the results.

[0070]

(Equation 2)

[0071]

[Table 1]

[0072]

According to the present invention, since the dissolution of the pesticidal active ingredient can be controlled very efficiently, the sustained release of the pesticidal active ingredient can be achieved over a longer period of time even with the same coating layer amount as that of the conventional granular pesticide composition. it can.

Claims (12)

[Claims] 1. A granular pesticidal composition comprising particles composed of an inner core and a coating layer, wherein the oil absorption of the inner core is 20%.
The following is a granular pesticidal composition characterized in that the ratio of the covering rate to the oil absorption of the inner core is 0.1 to 10, wherein the percentage of the coating layer weight relative to the inner core weight in the granular pesticidal composition is the covering rate. object. 2. The granular pesticidal composition according to claim 1, wherein said inner core contains an agricultural chemical active ingredient, a water-soluble polymer and a solid carrier. 3. The granular pesticidal composition according to claim 2, wherein the solid carrier has an oil absorption of 50 or less. 4. The granular pesticidal composition according to claim 1, wherein the inner core is obtained by extrusion granulation. 5. The granular pesticidal composition according to claim 4, wherein two or more kinds of solid carriers are used, one of which is a montmorillonite mineral. 6. The montmorillonite mineral has an inner core of 2.
The granular pesticidal composition according to claim 5, which is contained in an amount of 5 to 30% by weight. 7. The granular pesticidal composition according to claim 1, wherein the film-forming substance of the coating layer is a thermosetting resin. 8. The granular pesticidal composition according to claim 7, wherein the thermosetting resin is a polyurethane resin. 9. When the coating rate is defined as a percentage of the weight of the coating layer with respect to the weight of the inner core in the composition, the inner core having an oil absorption of 20 or less and the amount that provides a coating rate of 0.1 to 10 times the oil absorption of the inner core. A method for producing a granular pesticidal composition comprising particles composed of an inner core and a coating layer, characterized by mixing a film-forming substance. 10. The method according to claim 9, wherein said inner core is obtained by mixing and granulating an agricultural chemical active ingredient, a water-soluble polymer and a solid carrier. 11. The method according to claim 10, wherein a solid carrier having an oil absorption of 50 or less is used. 12. The method according to claim 10, wherein the granulation is extrusion granulation.