CN112314597A - Preparation method of aqueous suspending agent - Google Patents
Preparation method of aqueous suspending agent Download PDFInfo
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- CN112314597A CN112314597A CN202011383614.4A CN202011383614A CN112314597A CN 112314597 A CN112314597 A CN 112314597A CN 202011383614 A CN202011383614 A CN 202011383614A CN 112314597 A CN112314597 A CN 112314597A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/02—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing liquids as carriers, diluents or solvents
- A01N25/04—Dispersions, emulsions, suspoemulsions, suspension concentrates or gels
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N33/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic nitrogen compounds
- A01N33/16—Biocides, pest repellants or attractants, or plant growth regulators containing organic nitrogen compounds containing nitrogen-to-oxygen bonds
- A01N33/18—Nitro compounds
- A01N33/20—Nitro compounds containing oxygen or sulfur attached to the carbon skeleton containing the nitro group
- A01N33/22—Nitro compounds containing oxygen or sulfur attached to the carbon skeleton containing the nitro group having at least one oxygen or sulfur atom and at least one nitro group directly attached to the same aromatic ring system
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/56—1,2-Diazoles; Hydrogenated 1,2-diazoles
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/60—1,4-Diazines; Hydrogenated 1,4-diazines
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/64—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with three nitrogen atoms as the only ring hetero atoms
- A01N43/647—Triazoles; Hydrogenated triazoles
- A01N43/653—1,2,4-Triazoles; Hydrogenated 1,2,4-triazoles
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
- A01N47/10—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof
- A01N47/24—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof containing the groups, or; Thio analogues thereof
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N53/00—Biocides, pest repellants or attractants, or plant growth regulators containing cyclopropane carboxylic acids or derivatives thereof
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Abstract
The invention discloses a preparation method of a novel water suspending agent, which comprises the following specific steps: respectively adding the raw pesticide with lower melting point and water into a material mixing kettle, heating to the temperature above the melting point of the raw pesticide, adding the auxiliary agent after the raw pesticide is molten, and shearing and stirring to form a state similar to an aqueous emulsion; cooling to room temperature, adding the defoaming agent and the residual water, and fully stirring for blending; sampling and detecting, conveying to a finished product storage tank after the finished product storage tank is qualified, and then packaging into a product. Compared with the traditional process, the invention greatly shortens the preparation time, saves the energy consumption, simplifies the process flow, and reduces the investment of the equipment with high energy consumption such as a sand mill and the occupied area of the equipment.
Description
Technical Field
The invention relates to the field of processing of new pesticide formulations, in particular to a preparation method of a low-melting-point original pesticide aqueous suspension.
Background
The farmland weed hazard is one of the main biological disasters in the agricultural production process, and the farmland weed hazard has the advantages of competing for fertilizer, water, light and space with crops, spreading plant diseases and insect pests, preventing the crop yield from increasing and causing serious loss to the agricultural production. More than 1400 weeds exist in China, wherein more than 60 important farmland weeds which cause serious harm to agricultural production, 15 malignant weeds, 31 dominant weeds and 23 regionally dominant weeds exist. Herbicides (herbicides) refer to agents which cause complete or selective death of weeds, also known as herbicides, and are used to kill or inhibit plant growth. The herbicide has the characteristics of good weeding effect, high speed, low cost, simple and convenient use and the like, and is a main means for preventing and controlling the harm of farmland weeds and ensuring high and stable agricultural yield at present.
Generally speaking, a large amount of herbicides with a single action mechanism are continuously used, and the weeds are easy to generate drug resistance within 3-5 years. In recent years, the herbicide resistance of weeds is more and more serious due to the high frequency and large-area use of the herbicide and the multiple realities, changeability and diversity of individuals in weed populations, high adaptability to environment and genetic diversity. The new high-efficiency low-toxicity herbicide variety is used, and has great effect on solving the problems of difficult prevention and control of part of malignant weeds, drug resistance and the like; the herbicide with different action mechanisms is mixed for use, so that the weed control spectrum can be enlarged, the pesticide effect can be increased, and the drug resistance of weeds can be avoided and delayed.
The pesticide suspending agent (SC) is one of the more important pesticide formulations in modern pesticides, has obvious pesticide effect and convenient use, and plays an important role in the modern high-quality, high-yield, high-efficiency and sustainable agricultural production for the safety of operators. The formulation solves the problems of the traditional pesticide formulation to a great extent, such as reducing dust hazard, avoiding the potential safety hazard problem and environmental pollution problem in the production and use process caused by aromatic organic solvents such as toluene, xylene and solvent oil.
The pesticide suspending agent is a heterogeneous dispersion system with solid particles suspended in liquid, and the phenomena of uneven dispersion, poor suspension, sedimentation, creaming and the like are easy to occur in the production process. It has high requirement on the granularity, generally, the finer the fineness, the more uniform the distribution and the higher the suspension ratio. The aqueous suspension is prepared by grinding raw materials and adjuvants (wetting agent, dispersant, thickener, stabilizer, pH regulator and defoamer) with water as dispersion medium by wet method. Generally, the grinding time is long, raw medicines with hard particles are difficult to grind, generally, a colloid mill, a ball mill and a plurality of sand mills are required to be connected in series, the grinding is difficult, the efficiency is low, the energy consumption is high, and a new processing method is needed to optimize the problems.
Mixing low-melting-point raw medicine (melting point range: 40-95 deg.C) with water, heating to 100 deg.C, forming uniform stable dispersion system under the action of dispersing emulsifier, high-speed shearing to form small dispersed particles with particle diameter of 10 μm, and cooling to room temperature to form solid microparticles. Under the action of thickening agent, antifreezing agent and stabilizing agent, a suspension liquid with long-term stability is formed.
Disclosure of Invention
The invention discloses a preparation method of an aqueous suspending agent, which comprises the following specific steps: respectively adding a raw pesticide with a lower melting point (the melting point range is 40-95 ℃) and water into a material preparation kettle, heating to a temperature above the melting point of the raw pesticide, adding an auxiliary agent (wetting, dispersing, emulsifying and thickening) after the raw pesticide is molten, and shearing and stirring to form a state similar to an aqueous emulsion; cooling to room temperature, adding the defoaming agent and the residual water, and fully stirring for blending; sampling and detecting, conveying to a finished product storage tank after the finished product storage tank is qualified, and then packaging into a product.
The processing technology of the aqueous suspending agent is characterized by comprising the following steps:
a. adding the raw medicine with lower melting point and the process water into a material mixing kettle according to the mass ratio of 0.5-50% and 20-90%, and heating and melting;
b. respectively adding a wetting agent, a dispersing agent, a thixotropic agent, a thickening agent and an antifreezing agent into a material mixing kettle according to the mass ratio of 2-20%, 0.5-2%, 0-2% and 0-10%, shearing and stirring to form an aqueous emulsion state, wherein the detected particle size is less than or equal to 10.0 mu m;
c. cooling the shearing mixed solution to below room temperature (25 ℃);
d. if defoaming is needed, 0-0.5% of defoaming agent can be added, the rest water is complemented to 100% and fully stirred for 1h, and various indexes are sampled and analyzed until the standard requirement is qualified;
e. and after the products are qualified, the products are conveyed to a finished product storage tank and then are subpackaged into products with various packaging specifications.
Preferably, the technical is a low melting point technical comprising: raw medicines with the melting point range of 40-95 ℃ such as difenoconazole, oxyfluorfen, pyraclostrobin, bifenthrin, beta-cypermethrin, beta-cyhalothrin, triazolone, tebufenpyrad, quizalofop-ethyl and quizalofop-p-tefuryl.
Preferably, the defoaming agent is one or a mixture of n-octanol, polyether modified silicon and polydimethylsiloxane.
Preferably, the wetting agent is one or more of alkyl benzene sulfonate, alkyl sulfate, silicone polyether, fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene ether and fatty amine polyoxyethylene ether.
Preferably, the dispersant used is one or more of lignosulphonates, alkylbenzenesulphonates, sulphates, polycarboxylates and polyoxyethylene ethers.
Preferably, the thixotropic agent is one or more of magnesium aluminum silicate, attapulgite, bentonite, polyvinyl alcohol and fumed silica.
In the invention, the thickening agent is one or more of xanthan gum, sodium alginate, carboxymethyl cellulose, sodium polyacrylate and polyvinylpyrrolidone.
In the invention, the antifreezing agent is one or more of alcohols, inorganic salts and halogenated hydrocarbons.
The invention has the beneficial effects that: compared with the traditional process, the method greatly shortens the preparation time, saves the energy consumption, simplifies the process flow, and reduces the investment of equipment with high energy consumption such as a sand mill and the occupied area of the equipment.
Drawings
FIG. 1 is a flow chart of a conventional process for the preparation of an aqueous suspension concentrate;
FIG. 2 is a flow chart of the process for making the aqueous suspension of the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments disclosed below.
As shown in figure 2, adding a lower melting point raw pesticide (40-95 ℃) and water into a batching kettle respectively according to the formula requirement, heating and melting, adding an auxiliary agent (wetting, dispersing, emulsifying and thickening), shearing and stirring to form a state similar to an aqueous emulsion, and detecting the particle size to be 98% to be less than or equal to 10.0 mu m; cooling the sheared mixed solution to below room temperature (25 ℃), adding the defoaming agent and the residual water, and fully stirring for blending; sampling and detecting, conveying to a finished product storage tank after the finished product storage tank is qualified, and then packaging into a product.
Example 1: 30% difenoconazole water suspending agent
Adding 30% of difenoconazole technical material and 55% of process water in a material mixing kettle according to the mass ratio, and heating and melting to 85-90 ℃. Respectively adding 3.5% of sodium lignosulphonate, 3.5% of fatty alcohol-polyoxyethylene ether, 1.5% of magnesium aluminum silicate, 0.2% of xanthan gum and 3.5% of glycol into a material preparation kettle, shearing and stirring for 1.0h to form an aqueous emulsion state, and detecting the particle size to be 98% or less than 10.0 mu m. And (3) cooling the sheared mixed solution to 25 ℃, simultaneously adding 0.2% of defoaming agent and 0.2% of residual water to 100% of mass ratio, fully stirring for 0.5h, sampling and analyzing various indexes, and if the indexes meet the enterprise standard requirements, adding water again until the indexes are qualified. And after the product is qualified, conveying the product to a finished product storage tank, and then packaging the product into various specifications.
Example 2: 480g/L oxyfluorfen water suspending agent
Adding 40% of oxyfluorfen technical and 45% of process water in a material mixing kettle according to the mass ratio, and heating and melting to 85-90 ℃. 4.0% of calcium dodecyl benzene sulfonate, 3.0% of alkylphenol polyoxyethylene, 1.0% of bentonite, 0.2% of carboxymethyl cellulose and 3.0% of glycol are respectively added into a batching kettle, the materials are sheared and stirred for 1.0 hour to form an aqueous emulsion state, and the detected particle size is more than or equal to 98% and less than or equal to 10.0 mu m. And (3) cooling the sheared mixed solution to 25 ℃, simultaneously adding 0.2% of defoaming agent and 0.2% of residual water to 100% of mass ratio, fully stirring for 0.5h, sampling and analyzing various indexes, and if the indexes meet the enterprise standard requirements, adding water again until the indexes are qualified. And after the product is qualified, conveying the product to a finished product storage tank, and then packaging the product into various specifications.
Example 3: 25% pyraclostrobin suspension concentrate
Adding 25% of pyraclostrobin original drug and 60% of process water in a mass ratio into a blending kettle, and heating and melting to 70-85 ℃. Respectively adding 3.5% of fatty alcohol-polyoxyethylene ether sulfate, 4.0% of organic silicon polyether, 1.0% of fumed silica, 0.2% of sodium alginate and 3.5% of propylene glycol into a material preparation kettle, shearing and stirring for 1.0h to form an aqueous emulsion state, and detecting the particle size to be 98% or less than 10.0 mu m. And (3) cooling the sheared mixed solution to 25 ℃, simultaneously adding 0.2% of defoaming agent and 0.2% of residual water to 100% of mass ratio, fully stirring for 0.5h, sampling and analyzing various indexes, and if the indexes meet the enterprise standard requirements, adding water again until the indexes are qualified. And after the product is qualified, conveying the product to a finished product storage tank, and then packaging the product into various specifications.
Example 4: 15% bifenthrin suspension
Adding 15% of bifenthrin raw pesticide and 60% of process water in a material mixing kettle according to the mass ratio, and heating and melting to 80-90 ℃. Respectively adding 4.5% of polycarboxylate, 3.0% of fatty alcohol-polyoxyethylene ether, 1.0% of polyvinyl alcohol, 0.2% of xanthan gum and 3.5% of glycol into a material preparation kettle, shearing and stirring for 1.0h to form an aqueous emulsion state, and detecting the particle size to be 98% or less than 10.0 mu m. And (3) cooling the sheared mixed solution to 25 ℃, simultaneously adding 0.2% of defoaming agent and 0.2% of residual water to 100% of mass ratio, fully stirring for 0.5h, sampling and analyzing various indexes, and if the indexes meet the enterprise standard requirements, adding water again until the indexes are qualified. And after the product is qualified, conveying the product to a finished product storage tank, and then packaging the product into various specifications.
Example 5: 5% high-efficiency cypermethrin suspending agent
Adding 5% of beta-cypermethrin raw pesticide and 60% of process water in a material mixing kettle according to the mass ratio, and heating and melting to 80-90 ℃. Respectively adding 4.5% of alkyl phosphate, 3.0% of fatty amine alcohol polyoxyethylene ether, 1.5% of magnesium aluminum silicate, 0.2% of polyvinylpyrrolidone and 4.0% of glycerol into a batching kettle, shearing and stirring for 1.0h to form an aqueous emulsion state, and detecting the particle size to be more than or equal to 98% and less than or equal to 10.0 mu m. And (3) cooling the sheared mixed solution to 25 ℃, simultaneously adding 0.2% of defoaming agent and 0.2% of residual water to 100% of mass ratio, fully stirring for 0.5h, sampling and analyzing various indexes, and if the indexes meet the enterprise standard requirements, adding water again until the indexes are qualified. And after the product is qualified, conveying the product to a finished product storage tank, and then packaging the product into various specifications.
Example 6: 10% high-efficiency cyhalothrin suspending agent
Adding 10% of lambda-cyhalothrin raw pesticide and 70% of process water in a material mixing kettle according to the mass ratio, and heating and melting to 60-75 ℃. Respectively adding 5.0% of sodium lignosulphonate, 3.5% of alkylphenol polyoxyethylene, 1.0% of attapulgite, 0.2% of xanthan gum and 4.0% of ethylene glycol into a material mixing kettle, shearing and stirring for 1.5h to form an aqueous emulsion state, and detecting the particle size to be 98% and less than or equal to 10.0 mu m. And (3) cooling the sheared mixed solution to 25 ℃, simultaneously adding 0.2% of defoaming agent and 0.2% of residual water to 100% of mass ratio, fully stirring for 0.5h, sampling and analyzing various indexes, and if the indexes meet the enterprise standard requirements, adding water again until the indexes are qualified. And after the product is qualified, conveying the product to a finished product storage tank, and then packaging the product into various specifications.
Example 7: 44% triazolone suspension
Adding 44% of triazolone raw pesticide and 35% of process water in a material mixing kettle according to the mass ratio, and heating and melting to 90-100 ℃. Respectively adding 4.5% of alkyl polyoxyethylene ether phosphate, 4.5% of organic silicon polyether, 1.5% of magnesium aluminum silicate, 0.2% of xanthan gum and 4.0% of sodium chloride into a batching kettle, shearing and stirring for 1.0h to form an aqueous emulsion state, and detecting the particle size to be 98% or less than 10.0 mu m. And (3) cooling the sheared mixed solution to 25 ℃, simultaneously adding 0.2% of defoaming agent and 0.2% of residual water to 100% of mass ratio, fully stirring for 0.5h, sampling and analyzing various indexes, and if the indexes meet the enterprise standard requirements, adding water again until the indexes are qualified. And after the product is qualified, conveying the product to a finished product storage tank, and then packaging the product into various specifications.
Example 8: 30% tebufenpyrad suspension
Adding tebufenpyrad raw drug 30% and process water 55% in mass ratio into a blending kettle, and heating and melting to 75-90 ℃. Respectively adding 4.0% of polycarboxylate, 4.0% of fatty alcohol-polyoxyethylene ether, 1.0% of fumed silica, 0.2% of carboxymethyl cellulose and 4.5% of glycerin into a batching kettle, shearing and stirring for 1.0h to form an aqueous emulsion state, and detecting the particle size to be 98% or less than 10.0 mu m. And (3) cooling the sheared mixed solution to 25 ℃, simultaneously adding 0.2% of defoaming agent and 0.2% of residual water to 100% of mass ratio, fully stirring for 0.5h, sampling and analyzing various indexes, and if the indexes meet the enterprise standard requirements, adding water again until the indexes are qualified. And after the product is qualified, conveying the product to a finished product storage tank, and then packaging the product into various specifications.
Example 9: 50% quizalofop-ethyl suspension
Adding 50% of quizalofop-p-ethyl active compound and 30% of process water in a mixing kettle according to the mass ratio, and heating and melting to 95-100 ℃. Respectively adding 5.0% of sulfate, 3.0% of alkylphenol polyoxyethylene, 1.0% of attapulgite, 0.15% of xanthan gum and 3.0% of propylene glycol into a material preparation kettle, shearing and stirring for 2.5h to form an aqueous emulsion state, and detecting the particle size to be 98% and less than or equal to 10.0 mu m. And (3) cooling the sheared mixed solution to 25 ℃, simultaneously adding 0.2% of defoaming agent and 0.2% of residual water to 100% of mass ratio, fully stirring for 0.5h, sampling and analyzing various indexes, and if the indexes meet the enterprise standard requirements, adding water again until the indexes are qualified. And after the product is qualified, conveying the product to a finished product storage tank, and then packaging the product into various specifications.
Example 10: 25% quizalofop-p-tefuryl suspension
Adding 25% of quizalofop-p-tefuryl raw drug and 60% of process water in a material mixing kettle according to the mass ratio, and heating and melting to 75-90 ℃. Respectively adding 4.0% of sodium lignosulfonate, 3.5% of fatty amine polyoxyethylene ether, 1.0% of bentonite, 0.2% of sodium polyacrylate and 4.0% of glycerol into a material mixing kettle, shearing and stirring for 1.5h to form an aqueous emulsion state, and detecting the particle size to be 98% or less than 10.0 mu m. And (3) cooling the sheared mixed solution to 25 ℃, simultaneously adding 0.2% of defoaming agent and 0.2% of residual water to 100% of mass ratio, fully stirring for 0.5h, sampling and analyzing various indexes, and if the indexes meet the enterprise standard requirements, adding water again until the indexes are qualified. And after the product is qualified, conveying the product to a finished product storage tank, and then packaging the product into various specifications.
The above description is only exemplary of the preferred embodiments of the present invention, and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A preparation method of an aqueous suspending agent is characterized by comprising the following steps: comprises the following steps
a. Adding the raw medicine with lower melting point and the process water into a material mixing kettle according to the mass ratio of 0.5-50% and 20-90%, and heating and melting;
b. respectively adding a wetting agent, a dispersing agent, a thixotropic agent, a thickening agent and an antifreezing agent into a material mixing kettle according to the mass ratio of 2-20%, 0.5-2%, 0-2% and 0-10%, shearing and stirring to form an aqueous emulsion state, wherein the detected particle size is less than or equal to 10.0 mu m;
c. cooling the shearing mixed solution to below room temperature;
d. if defoaming is needed, 0-0.5% of defoaming agent can be added, and the rest water is made up to 100% and fully stirred.
2. The method of preparing an aqueous suspension formulation according to claim 1 wherein the technical material is a low melting technical material comprising: raw medicines with the melting point range of 40-95 ℃ such as difenoconazole, oxyfluorfen, pyraclostrobin, bifenthrin, beta-cypermethrin, beta-cyhalothrin, triazolone, tebufenpyrad, quizalofop-ethyl and quizalofop-p-tefuryl.
3. The method for preparing an aqueous suspension concentrate according to claim 1, wherein the defoaming agent is one or a mixture of n-octanol, polyether modified silicon and polydimethylsiloxane.
4. The method of claim 1, wherein the wetting agent is one or more selected from the group consisting of alkyl benzene sulfonate, alkyl sulfate, silicone polyether, fatty alcohol-polyoxyethylene ether, alkylphenol ethoxylate, and fatty amine ethoxylate.
5. The method of claim 1, wherein the dispersant is one or more selected from the group consisting of lignosulfonates, alkylbenzenesulfonates, sulfates, polycarboxylates, and polyoxyethylene ethers.
6. The method for preparing an aqueous suspension concentrate according to claim 1, wherein the thixotropic agent is one or more of magnesium aluminum silicate, attapulgite, bentonite, polyvinyl alcohol and fumed silica.
7. The method for preparing an aqueous suspension concentrate according to claim 1, wherein the thickener is one or more of xanthan gum, sodium alginate, carboxymethyl cellulose, sodium polyacrylate and polyvinylpyrrolidone.
8. The method for preparing an aqueous suspension concentrate according to claim 1, wherein the anti-freezing agent is one or more of alcohols, inorganic salts and halogenated hydrocarbons.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113632796A (en) * | 2021-07-29 | 2021-11-12 | 安徽黑包公有害生物防控有限公司 | Efficient mixed suspension type herbicide |
| CN115152749A (en) * | 2022-06-01 | 2022-10-11 | 佳化化学科技发展（上海）有限公司 | Aqueous suspension and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105028399A (en) * | 2015-07-14 | 2015-11-11 | 成都科利隆生化有限公司 | Suspending agent containing low-melting-point pesticide and preparation method of suspending agent |
| CN105638660A (en) * | 2015-12-20 | 2016-06-08 | 广东中迅农科股份有限公司 | Pesticide emulsion in water and preparation process thereof |
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| US20160316744A1 (en) * | 2013-12-19 | 2016-11-03 | Dow Global Technologies Llc | Additive package compositions for pesticide suspension concentrate formulations |
| CN105028399A (en) * | 2015-07-14 | 2015-11-11 | 成都科利隆生化有限公司 | Suspending agent containing low-melting-point pesticide and preparation method of suspending agent |
| CN105638660A (en) * | 2015-12-20 | 2016-06-08 | 广东中迅农科股份有限公司 | Pesticide emulsion in water and preparation process thereof |
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| CN113632796A (en) * | 2021-07-29 | 2021-11-12 | 安徽黑包公有害生物防控有限公司 | Efficient mixed suspension type herbicide |
| CN115152749A (en) * | 2022-06-01 | 2022-10-11 | 佳化化学科技发展（上海）有限公司 | Aqueous suspension and preparation method thereof |
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