JPH07165507A - Pesticide granules - Google Patents

Abstract

PURPOSE:To a granular agrochemical preparation excellent in disintegration and spreading properties and stability. CONSTITUTION:The characteristics of this granular agrochemical preparation comprise containing agricultural active components composed of imazosulfuron, mefenacet and dymron, an extender, a polyacrylic acid salt and a dialkylsulfosuccinic acid salt.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an agrochemical granule having excellent disintegration property. More specifically, the present invention relates to pesticide granules that rapidly disintegrate and spread in water when sprayed on paddy fields.
The formulations of the invention are used in the agricultural field for weeding purposes.

[0002]

2. Description of the Related Art Conventionally, granules are in the form of pharmaceuticals often used in the agricultural field together with powders, emulsions, wettable powders, etc. (Agricultural Handbook, 1992 edition, published by Japan Plant Protection Association). The polyacrylate used in the present invention is commercially available as a disintegration aid for solid agricultural chemical formulations. Further, dialkylsulfosuccinate is known as a surfactant for lowering the surface tension (published by Sangyo Tosho Co., Ltd., Handbook of Surfactants, date of issue, September 10, 1936). However, an agricultural chemical granule containing both a polyacrylic acid salt and a dialkylsulfosuccinate and having excellent disintegration is not known.

[0003]

The present invention provides a pesticide granule mainly used for rice cultivation in paddy fields.

When the granules are sprayed on a paddy, the granules disintegrate in water and spread to release the main drug, which diffuses to exert a medicinal effect. Therefore, the disintegration and spreadability of granules are important factors for excellent drug efficacy.

The present invention not only (1) when sprayed on a paddy field, swiftly absorbs water, swells, and easily disintegrates to spread the pesticidal active ingredient efficiently, and (2) excellent granulation property. , (3) The pesticide granules having excellent stability of pesticide active ingredient and (4) low manufacturing cost are provided.

[0006]

In order to solve the above-mentioned problems, the inventors of the present invention have developed a number of auxiliary agents, additives, surfactants, solvents, and additives used in the fields of agriculture and horticulture, medicine, and food. As a result of examining the combination thereof, it was found that an agricultural chemical granule produced by adding a polyacrylic acid salt and a dialkylsulfosuccinic acid salt solves the problem of the present invention.

The present invention provides (1) an agricultural chemical active ingredient comprising imazosulfuron, mefenacet and dimuron, a bulking agent, an agricultural chemical granule containing a polyacrylate and a dialkylsulfosuccinate, and (2) imazosulfuron. , Pesticide active ingredient consisting of mefenacet and daimuron, polyacrylic acid salt, dialkyl sulfosuccinate, extender, and further surfactant if desired,
And a method in which a binder is mixed and granulated,
It is a method for producing the pesticide granule according to (1). As the above-mentioned pesticide granules, (3) the content of polyacrylic acid salt is about 0.1 to 10% (weight ratio) and the content of dialkylsulfosuccinate salt is about 0.1 to the whole pesticide granules. ~ 5% (weight ratio)
The above-mentioned agricultural chemical granules are preferred.

Specific examples of the polyacrylic acid salt used in the present invention include polyacrylic acid sodium salt,
Polyacrylic acid potassium salt and the like are used, and the amount thereof is usually about 0.1 to 10% (weight) with respect to the entire pesticide formulation,
More preferably, it is about 0.5 to 5% (by weight).

The alkyl group of the dialkylsulfosuccinate used in the present invention preferably has about 5 to 20 carbon atoms, and specific examples thereof include sodium dioctylsulfosuccinate, potassium dinonylsulfosuccinate, and the like. The amount is usually about 0.1 to 5% (weight), more preferably about 0.2 to 2% (weight).

The amount of the agrochemical active ingredient used is usually about 0.1 to 50% (by weight), more preferably about 0.3 to 35% (by weight), based on the total amount of the agrochemical granules of the present invention.

The extender may be one normally used in solid pesticide formulations, but preferred examples include clay, talc, acid clay, diatomaceous earth, calcium carbonate, zeolite and the like. These may be used alone or in combination. The amount of filler used is usually about 45 to 95% (by weight)
It is a degree.

If desired, other additives such as binders and surfactants may be used.

The binder may be a binder usually used in the field of agricultural chemicals, but bentonite and dextrin are particularly preferable. These may be used alone or in combination. The amount of the binder used is usually about 1 to 50% (by weight),
More preferably, it is about 2 to 30% (by weight).

The surfactant may be any of nonionic, anionic, cationic and zwitterionic, but is usually nonionic and / or anionic. Is. Suitable nonionic surfactants include, for example, ethylene oxide adducts of higher alcohols such as lauryl alcohol, stearyl alcohol and oleyl alcohol; isooctylphenol,
Ethylene oxide adducts of alkylphenols such as nonylphenol; Ethylene oxide adducts of alkylnaphthols such as butylnaphthol, octylnaphthol; Ethylene oxide adducts of higher fatty acids such as palmitic acid, stearic acid, oleic acid; Monostearic phosphoric acid, dilaurylphosphoric acid, etc. Or ethylene oxide adduct of dialkyl phosphoric acid; dodecylamine, stearic acid amide amine polymerized with ethylene oxide;
Examples thereof include higher fatty acid esters of polyhydric alcohols such as sorbitan and ethylene oxide adducts thereof; polymerization adducts of ethylene oxide and propylene oxide. Suitable anionic surfactants include, for example, alkyl sulphate salts such as sodium lauryl sulphate and oleyl alcohol sulphate amine salt; alkyl sulphonates such as sodium sulfosuccinate dioctyl ester and sodium 2-ethylhexene sulphonate. And aryl sulfonates such as sodium isopropyl naphthalene sulfonate, sodium methylene bis naphthalene sulfonate, sodium lignin sulfonate, and sodium dodecylbenzene sulfonate. The amount of the surfactant used cannot be generally specified, but is usually 0.1 to 10% (weight), preferably 0.5 to 5%, based on the whole preparation of the present invention.
(Weight).

The pesticide granules of the present invention can be easily produced by a method known per se. For example, it is carried out by mixing and granulating an agricultural chemical active ingredient, a polyacrylic acid salt, a dialkylsulfosuccinate, an extender, and optionally a surfactant and a binder. Usually the ingredients are mixed with water,
It is produced by extrusion granulation and drying.

[0016]

EXAMPLES The present invention will be described below with reference to examples and test examples.

Example 1 In a small kneader, calcium carbonate 584.19 g, imazosulfuron drug substance (purity: 98%) 3.06 g, daimuron (purity: 98%) 51.02 g, mefenacet (purity: 98%) 36.73 g, Toxanone GR31A (about 40% polyacrylate aqueous solution, Sanyo Kasei (Japan)) 20
g, Sanmorin OT-70 (sodium dioctyl sulfosuccinate about 70% aqueous solution, Sanyo Kasei Co., Ltd.), and bentonite 300 g were sequentially added, and after mixing for 20 minutes,
150 ml of tap water was added and kneaded for 10 minutes. The kneaded product is granulated with an extrusion type granulator (particle size 0.8 mm), dried with a fluidized bed dryer, and then sifted to obtain a granule of about 0.3 to 1.7 mm (opening size). 800 g (yield: about 80%) was obtained.

Test Example 1 (1) Storage stability The granules obtained in Example 1 above were stored at 40 ° C. for 1 month, 2 months and 3 months and at room temperature for 1 year and 6 months to be contained in the granules. The residual ratio of the active pesticide active ingredient was measured.

(A) Granules of Example 1

[Table 1]

(2) Disintegration and spreadability test A 50 cm 3 degree hard water is put into a petri dish having a diameter of 9 cm, 3 granules are dropped, and the time when the original shape of the granules cannot be maintained is measured. Then, the spread area is measured 30 minutes after the dropping.

[0021]

[Table 4]

From the above test results, it can be seen that the granules of the present invention have high hardness and excellent disintegration and spreadability even in water, and have excellent storage stability of pesticidal active ingredients.

[0023]

The pesticide granules of the present invention have excellent disintegration and spreadability in water and excellent storage stability of pesticide active ingredients.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical indication location A01N 47/30 C (72) Inventor Taizo Hasegawa 9-7 Takeda, Kasuga, Tsukuba, Ibaraki Kasuga Heights No. 1203 (72) Inventor Anzo Kumazaki 4-5-9, Mayudai, Nakayama, Takarazuka-shi, Hyogo

Claims (3)

[Claims] 1. An agrochemical granule comprising an agrochemical active ingredient consisting of imazosulfuron, mefenacet and dimuron, a bulking agent, a polyacrylate and a dialkylsulfosuccinate. 2. A polyacrylic acid salt content of about 0.1 to 10% (weight ratio) and a dialkylsulfosuccinic acid salt content of about 0.1 to 5% (weight ratio) based on the whole pesticide granules. ) Is a pesticide granule according to claim 1. 3. A pesticide active ingredient comprising imazosulfuron, mefenacet and dimuron, a polyacrylate salt,
2. The method for producing a pesticide granule according to claim 1, wherein the dialkyl sulfosuccinate, a filler, and optionally a surfactant and a binder are mixed and granulated.