JP2000313685A - Production of agrochemical-containing granular fertilizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an agrochemical active ingredient to uniformly impregnate a granular fertilizer by impregnating or coating the granular fertilizer with an aqueous solution or water dispersion containing the agrochemical active ingredient (except metominostrobin) and having a specific viscosity. SOLUTION: A granular fertilizer is impregnated or coated with an aqueous solution or water dispersion containing an agrochemical active ingredient (except metominostrobin) and having 50-700 mPa.s viscosity to provide the objective fertilizer. A mixed fertilizer containing nitrogen, phosphorus, potassium and the like, a chemical fertilizer and the like can be used as the granular fertilizer, and the particle diameter is preferably about 0.5-5.0 mm. Pyrazosulfuron-ethyl, bentazon, dithiopyr or the like as a herbicide, pirimiphos methyl, cartap or the like as a insecticide, an inorganic copper compound, azoxystrobin or the like as a fungicide and uniconazole or the like as a plant growth regulator are usable as the agrochemical active ingredients. Besides, the granular fertilizer can more uniformly be impregnated and coated by adding a surfactant and a thickening agent to the aqueous solution or the water dispersion containing the agrochemical active ingredient.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a novel method for producing a granular fertilizer containing an agrochemically active ingredient.

[0002]

2. Description of the Related Art Various studies have been made on fertilizers containing pesticides for the purpose of labor saving of agricultural work. In particular, the technique of laterally applying fertilizer rice planting in paddy fields, which has become popular in recent years, has a very great advantage because pesticides and fertilizers can be applied simultaneously with rice planting. This pesticide-containing fertilizer is mainly a granular material that is easy to handle and generates little dust. The production method is a method of kneading the pesticide when granulating the fertilizer and a method of impregnating and coating the granular fertilizer with the pesticide. They are roughly divided into Of these methods, the method of kneading the pesticide when granulating the fertilizer can be produced with ordinary chemical fertilizer production equipment, but is difficult in practice because there is a risk of mixing the pesticide with general chemical fertilizer. On the other hand, the method of impregnating and coating the granular fertilizer with the pesticide has no problem of mixing the pesticide into the general chemical fertilizer because the fertilizer product can be used as it is, but the uniformity of the pesticide impregnation coating may be insufficient, The improvement was desired.

[0003]

[Means for Solving the Problems] In view of such a situation, the present inventors have conducted intensive studies. As a result, when producing a granular fertilizer-containing granular fertilizer by a method of impregnating and coating the granular fertilizer with the pesticide, the pesticide is uniformly distributed. A method for impregnating and coating the active ingredient has been found, and the present invention has been completed. That is, the present invention
This relates to the following [1] and [2].

[1] A pesticide-containing material characterized by impregnating and coating a granular fertilizer with an aqueous solution or an aqueous dispersion having a viscosity of 50 to 700 mPa · s containing a pesticide active ingredient (excluding metominostrobin). Manufacturing method of granular fertilizer.

[2] The production of the pesticide-containing granular fertilizer according to the above-mentioned [1], wherein the aqueous solution or aqueous dispersion containing the pesticidal active ingredient (excluding metominostrobin) contains a surfactant and a thickener. Method.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below. The granular fertilizer used in the present invention is not particularly limited, and a wide range can be used. Specific examples include compound fertilizers and chemical fertilizers containing nitrogen, phosphorus, potassium and the like. In particular, the nitrogen-containing granular fertilizer may contain either a fast-acting nitrogen fertilizer or a slow-acting nitrogen fertilizer imparting nitrogen sustainability. Further, those containing a soil conditioner such as nitrohumic acid may be used. The particle size of these granular fertilizers is not particularly limited, but is preferably 0.5 to 5.0 mm for production.

The pesticidal active ingredient used in the present invention is not particularly limited, but includes, for example, the following. In addition, depending on the types of weeds and pests to be controlled, one or more of the following pesticidal active ingredients may be used.
More than one kind may be mixed.

Examples of herbicides include pyrazosulfuron ethyl (generic name), halosulfuron methyl (halosulfuron methyl / generic name), bensulfuron methyl (bensulfuron methyl / generic name), imazosulfuron (imazosulfuron / generic name), Azimsulfuron (common name), sinosulfuron (cinosu)
lfuron / generic name), cyclosulfa
muron / generic name) and ethoxysulfuron
furon (generic name), sulfonylurea herbicides, esprocarb (generic name), benthiocarb (ben)
Carbamate herbicides such as thiocarb / generic name, molinate / generic name, dimepiperate / generic name and pyributicarb / pyributicarb / generic name, mefenacet (mefenacet / generic name), butachlor (butachlor / generic name) ), Pretilachlor (pretilachlor / generic name), tenylchlor (thenylchlor / generic name), bromobutide (bromobutide)
Acid amide herbicides such as / generic name and etobenzanid / generic name; urea herbicides such as dimron (dymron / generic name) and cumyluron (cumyluron / generic name);

Diazine herbicides such as bentazone (bentazone / generic name) and salts of bentazone, 2,4-D
(Generic name), 2,4-D salt, 2,4-D ester,
MCP (generic name), salt of MCP, ester of MCP, M
Phenoxy acid herbicides such as CPB (generic name), MCPB salt, MCPB ester, phenothiol (MCPA-thioethyl / generic name), clomeprop (clomeprop / generic name) and naproanilide (naproanilide / generic name), oxadiazon ( oxadiazon / generic name, pyrazolate (pyrazolate / generic name), pyrazoxifene (pyra
zoxyfen / generic name), benzofenap /
Diazole herbicides such as oxadiargyl (generic name) and oxadiargyl (generic name);
triazine herbicides such as thametryn / generic name and simetryn (simetryn / generic name), piperophos (piperoph)
os / generic name), anilofos (anilofos / generic name), butamifos (butamifos / generic name) and benzulide (bensu)
organic phosphorus herbicides such as lide / generic name),

Dithiopyr (common name) and pyriminobac methyl (common name)
Aromatic dicarboxylic acid herbicides such as CNP (generic name), chloromethoxynil (generic name), cyhalofop butyl (cyhalofop butyl / generic name) and bifenox (bifenox / generic name); Cafenstrole
/ General name), pentoxazone (pentoxazone / general name), indanophan (indanofan / general name), oxadiclomefone (oxaziclomefone / general name), fentrazamide (fentrazamide / general name), butenachlor (bu
tenachlor / generic name), ACN (generic name), benzobicyclon (benzobicyclon / test name), benfresate (b
enfuresate / generic name) and cymmethyli
n / common name) and the like.

In the insecticide, for example, MPP (common name),
MEP (generic name), pirimiphos methyl
hyl / common name), diazinon (diazinon / common name),
Pyridafenthion (pyridaphenthion / generic name), chlorpyrifos methyl (chlorpyrifos methyl / generic name), vamidothion (vamidothion / generic name), marathon (malathion / generic name), PAP (generic name), dimethoate (dimethoate / generic name), ethylthiomethone ( di
sulfoton / generic name), PMP (generic name), monocrotophos (generic name), BRP (generic name), C
VMP (generic name), dimethylvinpho
s / general name), propaphos (propaphos / generic name), DE
Organophosphorus pesticides such as P (generic name) and EPN (generic name), NAC (generic name), MTMC (generic name), MIP
C (generic name), BPMC (generic name), PHC (generic name), XMC (generic name), methomil (methomyl / generic name), thiodicarb (thiodicarb / generic name), bendiocarb (bendiocarb / generic name), Carbosulfan (common name) and benfracalp (benfu
carbamate insecticides such as racarb / generic name)

Cartap (generic name), thiocyclam (generic name) and bensultap (be
nerultoxin insecticides such as nsultap / generic name; insect growth regulators such as buprofezin (buprofezin / generic name) and tebufenozide (tebufenozide / generic name); ethofenprox (ethofenprox / generic name) Pyrethroid insecticides such as cycloprothrin / generic name, and fipronil / generic name and fipronil / imidacloprid / generic name
And other insecticides.

Examples of the disinfectants include copper disinfectants such as inorganic copper agents, organochlorine disinfectants such as fthalide (common name), and organic phosphorus disinfectants such as IBP (common name) and EDDP (common name). , Fungicides such as dicarboximides such as iprodione (generic name), mepronil (meprnil)
onil / generic name, flutolanil (flutolanil / generic name), teclophthalam (tecloftalam / generic name), penciclone (pencycuron / generic name), metalaxyl (meta
acid amide fungicides such as laxyl / generic name, thifluzamide / thifluzamide / dicrocymet / generic name, furametpyr / furametpyr / carpropamide / carpropamide / generic name, blasticidin S ( blasticidin S / generic name, kasugamycin / generic name, polyoxin (polyo
xins / generic name), antibiotic fungicides such as validamycin A / generic name and spinosad (generic name),

Azoxystrobin (generic name), kresoximmethyl (generic name)
And methoxyacrylate fungicides such as metominostrobin (generic name), acetamiprid (acetamiprid / generic name) and clothianidin (c
Nitromethylene fungicides such as hlothianidine / generic name and organic arsenic agents, diclomezine (diclomezine / generic name), ferimzone (ferimzone / generic name), probenazole (probenazole / generic name), isoprothiolane (isoprothiolane / generic name), tricyclazole (Tric
yclazole / generic name), pyroquilon (pyroquilon / generic name), iminoctadine acetate (guazatine / generic name),
Chlorfenapyr (chlorfenapyr / generic name), mepanipyrim (mepanipyrim / generic name), oxolinic acid (oxo
Other fungicides such as linic acid / generic name and acibenzolar-S-methyl / generic name.

Examples of plant growth regulators include, for example, uniconazole (uniconazole / generic name) and inabenfide (i
nabenfide / common name) and the like.

The viscosity of the aqueous solution or dispersion containing the pesticidal active ingredient used in the present invention is 50 to 700 mPa · s,
Preferably it is 100 to 700 mPa · s. Viscosity is 50mPa
-If it is lower than s, the rate of impregnation into the granular fertilizer is high and local impregnation occurs, which causes a problem in uniformity. On the other hand, 70
If it is higher than 0 mPa · s, it does not spread throughout the granular fertilizer and is also locally impregnated. Further, by adding a surfactant and a thickener to the aqueous solution or the aqueous dispersion containing the pesticidal active ingredient, the aqueous fertilizer can be more uniformly impregnated and coated with the aqueous solution or the aqueous dispersion.

The surfactant which can be added to the aqueous solution or the aqueous dispersion containing the pesticidal active ingredient may be one generally used as a wetting agent or dispersant in a pesticide formulation, and is not particularly limited. However, an anionic or nonionic surfactant is mainly used. The specific list is as follows.

As the nonionic surfactant, for example,
Lioxyethylene alkyl (C₁₂~ ₁₈) Ether, al
Kirnaphthol ethylene oxide adduct, polyoxo
Cyethylene (mono or di) alkyl (C₈~₁₂) Fe
Nyl ether, polyoxyethylene (mono or di)
Lequil (C₈~₁₂) Formalin condensation of phenyl ether
Material, polyoxyethylene (mono, di or tri) phenyl
Phenyl ether, polyoxyethylene (mono, di
Or tri) benzylphenyl ether, polyoxypro
Pyrene (mono, di or tri) benzyl phenylate
, Polyoxyethylene (mono, di or tri) stille
Phenyl ether, polyoxypropylene (mono, di
Or tri) styryl phenyl ether, polyoxye
Tylene (mono, di or tri) styryl phenyl ether
Polymer, polyoxyethylenepolyoxypropylene
Block polymer, alkyl (C₁₂~₁₈) Polyoxy
Ethylene polyoxypropylene block polymer ether
, Alkyl (C₈~₁₂) Phenylpolyoxyethylene
Polyoxypropylene block polymer ether, poly
Oxyethylene bisphenyl ether, polyoxyethylene
Lenic acid ester, polyoxyethylene fatty acid (C₁₂
~₁₈) Monoester, polyoxyethylene fatty acid (C₁₂
~₁₈) Diester, polyoxyethylene sorbitan fat
Acid (C₁₂~₁₈) Esters, glycerol fatty acid esters
Ethylene oxide adduct, castor oil ethylene oxide
Adduct, hydrogenated castor oil ethylene oxide adduct,
Lequil (C₁₂~₁₈) Amine ethylene oxide adduct
And fatty acids (C₁₂~₁₈) Amide ethylene oxide addition
Polyethylene glycol type surfactants such as

[0019] such as glycerol fatty acid esters, polyglycerol fatty acid esters, pentaerythritol fatty acid esters, sorbitol fatty acid (C ₁₂ ~ ₁₈₎ esters, sorbitan fatty acid (C ₁₂ ~ ₁₈₎ esters, sucrose fatty acid esters, polyhydric alcohol alkyl ethers and fatty acids Polyhydric alcohol surfactants such as alkanolamides, for example, acetylene-based surfactants such as acetylene glycol, acetylene alcohol, ethylene oxide adducts of acetylene glycol and ethylene oxide adducts of acetylene alcohol, and alkyl glycosides are exemplified.

Examples of the anionic surfactant include, for example,
Polyacrylate, polymethacrylate, polymaleate, salt of a copolymer of maleic acid and an olefin (eg, isobutylene and diisobutylene), salt of a copolymer of acrylic acid and itaconic acid, methacrylic acid And itaconic acid copolymer salts, maleic acid and styrene copolymer salts, acrylic acid and methacrylic acid copolymer salts,
Salt of copolymer of acrylic acid and acrylic acid methyl ester, salt of copolymer of acrylic acid and vinyl acetate, salt of a copolymer of acrylic acid and maleic acid, N- methyl - fatty (C ₁₂ ~ ₁₈ ) sarcosinate, resinates and fatty (C ₁₂ ~ ₁₈₎ carboxylate, such as salts,

For example, alkyl (C₁₂~₁₈) Sulfate
Salt, polyoxyethylene alkyl (C ₁₂~₁₈)ether
Sulfate, polyoxyethylene (mono or di)
Alkyl (C₈~₁₂) Phenyl ether sulfate
Salt, polyoxyethylene (mono or di) alkyl (C
₈~₁₂) Sulfuric esters of phenyl ether polymers
Salt, polyoxyethylene (mono, di or tri) phenyl
Phenyl ether sulfate, polyoxyethylene
(Mono, di or tri) benzyl phenyl ether sulfur
Acid ester salts, polyoxyethylene (mono, di or
I) Styryl phenyl ether sulfate, polio
Xyethylene (mono, di or tri) styrylphenyl
Sulfuric acid ester salts of ether polymers, polyoxyethylene
Sulfate sulfate of lenpolyoxypropylene block polymer
Ter salt, sulfated oil, sulfated fatty acid ester, sulfated fat
Sulfuric acid ester salts such as acids and sulfated olefins,

For example, paraffin (C₁₂~_{twenty two})Sulfonic acid
Salt, alkyl (C₈~₁₂) Benzene sulfonate, Al
Kill (C₈~₁₂) Formalin condensation of benzenesulfonic acid
Of formalin condensate of cresol sulfonic acid
Salt, α-olefin (C₁₄~₁₆) Sulfonate, dial
Kill (C₈~₁₂) Sulfosuccinate, lignin sulfone
Acid salt, polyoxyethylene (mono or di) alkyl
(C₈~₁₂) Phenyl ether sulfonate, polyoxy
Cyethylene alkyl (C₁₂~₁₈) Ether sulfo
Acid half ester, naphthalene sulfonate,
Or di) alkyl (C ₁~₆) Naphthalene sulfonate,
Salt of formalin condensate of naphthalenesulfonic acid, (mono
Or di) alkyl (C₁~₆) Of naphthalenesulfonic acid
Formalin condensate salt, creosote oil sulfonic acid e
Salt of rumarin condensate, alkyl (C₈~_{1 Two}) Diphenyl
Ether disulfonate, Igepon T (trade name), Poly
Styrene sulfonic acid salt and styrene sulfonic acid and meta
Sulfonates, such as acrylic acid copolymer salts;

Also, for example, alkyl (C ₈ -C ₁₂ ) phosphoric acid ester salts, polyoxyethylene alkyl (C ₁₂ -C ₁₈ )
Ether phosphate ester salts, polyoxyethylene (mono- or di-) alkyl (C ₈ ~ ₁₂₎ phenyl ether phosphate ester salts, polyoxyethylene (mono-, di- or tri)
Alkyl (C ₈ ~ ₁₂₎ phosphates salts of polymers of phenyl ether, polyoxyethylene (mono-, di- or tri-) phenyl phenyl ether phosphate ester salts, polyoxyethylene (mono-, di- or tri-) benzyl phenyl ether phosphate ester salts, Polyoxyethylene (mono,
Di or tri) styryl phenyl ether phosphate, polyoxyethylene (mono, di or tri) styryl phenyl ether polymer phosphate, polyoxyethylene polyoxypropylene block polymer phosphate, phosphatidylcholine, phosphatidylethanolimine and Phosphate salts such as condensed phosphates (for example, tripolyphosphates and the like) are exemplified. Examples of the salt include alkali metals (such as lithium, sodium and potassium), alkaline earth metals (such as calcium and magnesium), ammonium and various amines (such as alkylamine, cycloalkylamine and alkanolamine). .

Examples of the cationic surfactant include an alkylamine salt and an alkyl quaternary ammonium salt.

Examples of the amphoteric surfactant include betaine type and amino acid type.

Other surfactants include silicone surfactants and fluorine surfactants.

As the thickener which can be added to the aqueous solution or aqueous dispersion containing the pesticidal active ingredient, organic and inorganic natural products, synthetic products and semi-synthetic products can be used. For example, xanthan gum (xanthan gum), welan gum And heteropolysaccharides such as ramzan gum, polyvinyl alcohol, polyvinylpyrrolidone, polyacrylic acid, synthetic water-soluble polymer compounds such as sodium polyacrylate and polyacrylamide, methylcellulose, carboxymethylcellulose, carboxyethylcellulose, hydroxyethylcellulose and hydroxypropylcellulose. Cellulose derivatives, montmorillonite, saponite, hectorite, bentonite, pendelite, nontronite, saukolite, stepenside, laponite and synthetic smectite Mention may be made of the smectite clay minerals such as site.

The aqueous solution or aqueous dispersion containing the pesticidal active ingredient used in the present invention may further contain auxiliary agents generally used in pesticide preparations such as deicing agents, preservatives, various stabilizers and pigments. Can be added.

The pesticide-containing granular fertilizer of the present invention can be produced, for example, by the following method. The production method is to add the granular fertilizer to a rolling granulator or a stirring granulator and add a uniform aqueous solution or aqueous dispersion containing one or more pesticidal active ingredients while rolling or stirring. Obtained by impregnation. The added water may be removed by drying if necessary. Examples of the rolling type granulator used in the above method include a pan type, a drum type, an application of a concrete mixer and a ball mill rotating base, and the like, and as a stirring type mixer,
Ribbon mixers, Naoter mixers, universal mixing stirrers, and the like. For preparing the aqueous dispersion, a homomixer and a wet pulverizer such as a colloid mill and a bead mill can be used in addition to a usual stirrer.

The pesticide-containing granular fertilizer thus produced can be used in various situations where the application time of the pesticide and the fertilizer overlap. More preferably, the fertilizer is applied to the paddy field at the time of seedling transplantation or at the time of seeding of paddy. By doing so, weeds and pests in paddy fields can be controlled, and, as compared with conventional control methods, it is possible to significantly reduce labor, and can exert more stable and reliable control effects, and It can also exert a fertilizing effect.

[0031] The side application is a method similar to a fertilization method generally called "side application", and the pesticide-containing granular fertilizer is applied as a side application to a lower layer of soil. As one example, the roots of rice seedlings to be transplanted in rows and the roots of the seedlings, or approximately parallel to a line obtained by connecting paddy and rice seeded in rows, and approximately horizontally from the line A method of applying a pesticide-containing granular fertilizer to paddy soil 3-15 cm deep on a line 2-15 cm away can be shown. The application rate and application concentration of the pesticide-containing granular fertilizer may vary depending on weather conditions, but the application rate of the pesticide-containing granular fertilizer is usually about 1 to 20,000 g / a, preferably about 10 to
2000 g / a. In addition, the pesticide-containing granular fertilizer is mixed with one or more selected from other fungicides, insecticides, acaricides, nematicides, herbicides, plant growth regulators, fertilizers, and soil conditioners as necessary. It can be applied at the same time or at the same time.

[0032]

EXAMPLES Next, the present invention will be described specifically with reference to Examples, but the present invention is not limited to these Examples.
All parts are by weight.

Example 1 In 95.7 parts of water, 3.0 parts of polyoxyethylene styryl phenyl ether sulfate ammonium salt and 0.2 part of xanthan gum were dissolved.
1.1 parts of pyrazosulfuron-ethyl were dispersed. 1.0 part of the aqueous dispersion was added to a Nauta mixer (Hosokawa Micron)
12% nitrogen, 15% phosphoric acid, potassium 1
99.0 parts of a granular fertilizer containing 5% was impregnated to obtain a pesticide-containing granular fertilizer.

Example 2 3.0 parts of ammonium polyoxyethylene styrylphenyl ether sulfate and 0.5 part of xanthan gum were dissolved in 95.4 parts of water.
1.1 parts of pyrazosulfuron-ethyl were dispersed. 1.0 part of the aqueous dispersion was added to a Nauta mixer (Hosokawa Micron)
99.0) using the granular fertilizer used in Example 1.
To obtain a pesticide-containing granular fertilizer.

Comparative Example 1 In 95.9 parts of water, 3.0 parts of polyoxyethylene styryl phenyl ether sulfate ammonium salt were dissolved, and 1.1 parts of pyrazosulfuron-ethyl was dispersed. 1.0 part of the aqueous dispersion was impregnated with 99.0 parts of the granular fertilizer used in Example 1 using a Nauter mixer (manufactured by Hosokawa Micron Corporation) to obtain a pesticide-containing granular fertilizer.

Comparative Example 2 In 95.2 parts of water, 3.0 parts of ammonium salt of polyoxyethylene styryl phenyl ether sulfate and 0.7 part of xanthan gum were dissolved.
1.1 parts of pyrazosulfuron-ethyl were dispersed. 1.0 part of the aqueous dispersion was added to a Nauta mixer (Hosokawa Micron)
99.0) using the granular fertilizer used in Example 1.
To obtain a pesticide-containing granular fertilizer.

Test Example 1 The viscosities of the aqueous dispersions containing the pesticidally active ingredients used in Examples and Comparative Examples were measured using a Brookfield viscometer (Model DV-III, manufactured by Brookfield). 2 rotors, 30 rpm
m at a temperature of 25 ° C. Further, the uniformity when the dispersion was impregnated with the granular fertilizer was visually evaluated according to the evaluation criteria shown in Table 1. The smaller the value of the evaluation of the uniformity, the more uniform the impregnation. The results of the second
It is shown in the table. As is clear from Table 2, the uniformity was good within the viscosity range of the present invention, but out of the range, the aqueous dispersion was impregnated unevenly.

[0038]

[Table 1] Table 1 ―――――――――――――――――――――――――――――― Impregnated coating condition Evaluation of uniformity ――――――――――――――――――――――――― The entire surface is uniformly impregnated and covered 1 There is slight unevenness but the entire surface is impregnated and covered 2 Local 3 ――――――――――――――――――――――――――――――

[0039]

[Table 2] Table 2 ―――――――――――――――――――――――――――― Viscosity of water dispersion (mPa · s) Uniformity Evaluation ―――――――――――――――――――――――――――― Example 1 55 1 Example 2 650 1 Comparative Example 1 5 3 Comparative Example 2 1100 3 ――――――――――――――――――――――――――――――

[0040]

EFFECT OF THE INVENTION The pesticide-containing granular fertilizer of the present invention has a problem in uniformity of the pesticide active ingredient by impregnating the aqueous fertilizer with an aqueous solution or aqueous dispersion having a viscosity of 50 to 700 mPa · s containing the pesticide active ingredient. A pesticide-containing granular fertilizer free from pesticides can be obtained.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) C05G 5/00 C05G 5/00 Z

Claims (2)

[Claims] 1. A pesticide-containing granule characterized in that a granular fertilizer is impregnated with an aqueous solution or aqueous dispersion having a viscosity of 50 to 700 mPa · s containing a pesticide active ingredient (excluding metminostrobin). Manufacture of fertilizer. 2. The method for producing a pesticide-containing granular fertilizer according to claim 1, wherein the aqueous solution or aqueous dispersion containing the pesticidal active ingredient (excluding metominostrobin) contains a surfactant and a thickener.