CN115304722A - Preparation method and application of special anti-settling dispersion thickening agent for pesticide preparation - Google Patents

Preparation method and application of special anti-settling dispersion thickening agent for pesticide preparation Download PDF

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CN115304722A
CN115304722A CN202211086313.4A CN202211086313A CN115304722A CN 115304722 A CN115304722 A CN 115304722A CN 202211086313 A CN202211086313 A CN 202211086313A CN 115304722 A CN115304722 A CN 115304722A
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preparation
acrylamide
mixture
solvent
viscosity
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易先聪
周景昊
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Guangzhou Ftrt Chemical Co ltd
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Guangzhou Ftrt Chemical Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
    • C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
    • 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
    • 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
    • A01N25/30—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 characterised by the surfactants
    • 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
    • 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
    • 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
    • A01N51/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds having the sequences of atoms O—N—S, X—O—S, N—N—S, O—N—N or O-halogen, regardless of the number of bonds each atom has and with no atom of these sequences forming part of a heterocyclic ring
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/04—Azo-compounds

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Zoology (AREA)
  • Dentistry (AREA)
  • Environmental Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Agronomy & Crop Science (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Organic Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Toxicology (AREA)
  • Dispersion Chemistry (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

A preparation method and application of a special anti-settling dispersion thickening agent for pesticide preparations are characterized by comprising the following steps: adding acid, acrylamide, an initiator, a dispersant and a solvent into a reaction kettle, carrying out nitrogen protection, stirring and heating to 50-70 ℃, and reacting for 0.5-1 h; dripping reaction monomers for 2-3 h within the temperature range; then heating to 80-90 ℃, and preserving heat for 3h; and cooling, adding a neutralizing agent, distilling to extract the solvent, and adding water to obtain the product dispersing thickener. The introduction of reactive monomers not only increases the hydrophilicity of the polymerization, but also provides a large number of hydrogen bond donors and acceptors. Hydrophobic associations and hydrogen bonding allow the formation of higher order cross-linked network structures within and between polymer molecules.

Description

Preparation method and application of special anti-settling dispersion thickening agent for pesticide preparation
Technical Field
The invention relates to the technical field of surfactant synthesis in organic chemistry and the technical field of agricultural dispersants, and particularly relates to a preparation method and application of a special anti-settling dispersing thickener for a pesticide preparation.
Background
The dispersant is a substance capable of uniformly dispersing solid particles in a medium such as water. The dispersing agent is widely applied to the field of chemical industry, and common dispersing agents are mostly used in the production and use processes of materials, help material particles and media to be mixed to form uniform and stable suspension, and are formed through interaction force among particles. However, the action force of a pure dispersing agent is weak, so that the defects of poor suspension property and poor settling resistance exist mostly, the preparation is easy to deposit, and the preparation is influenced in the processes of production, storage and use. The thickening agent, the viscosity of the preparation and the sedimentation phenomenon are improved to a certain extent, the actual production needs cannot be met, and the cost is greatly increased.
Patent ZL2005800430583 discloses a rheology modifier/hair styling resin which is a crosslinked linear poly (vinylamide/polymerizable carboxylic acid) copolymer exhibiting advantageous hair care properties of high viscosity and long lasting curl retention. This solution can provide good film-forming properties, but it has a problem in that it cannot form a relatively stable salt-resistant crosslinked structure when applied to the skin, resulting in loss of water and reduced viscosity of the gel.
Patent US4375533 discloses that a non-ionic surfactant with HLB value less than 10 is added into a single solvent (benzene, cyclohexane, solvent oil or ethyl chloride) system, and a carboxylic acid copolymer thickener which is easy to wet is prepared at 60-65 ℃ by a precipitation polymerization method.
The prepared anti-settling dispersing thickener special for the pesticide preparation aims at the defects of the existing dispersant and synergist, improves the flexibility of the dispersant molecules, increases the coating area of the dispersant molecules on solid particles, enhances the dispersing performance of the dispersant, properly improves the stability and thickening action of the preparation, improves the anti-settling performance, reduces the cost and is environmentally-friendly.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a preparation method and application of a special anti-settling dispersion thickening agent for a pesticide preparation.
The technical purpose of the invention is realized by the following technical scheme: the preparation method of the special anti-settling dispersion thickening agent for the pesticide preparation comprises the following steps: adding acid, acrylamide, an initiator, a dispersant and a solvent into a reaction kettle, carrying out nitrogen protection, stirring and heating to 50-70 ℃, and reacting for 0.5-1 h; dripping reaction monomers for 2-3 h within the temperature range; then heating to 80-90 ℃, and preserving heat for 3h; and cooling, adding a neutralizing agent, distilling and extracting the solvent to obtain the product dispersing thickener.
According to the technical scheme, the acid is one or a mixture of more than 2 of acrylic acid, methyl acrylate, methyl methacrylate and butyl methacrylate. The addition of the above acids improves the dispersion and hydrophilic properties of the product.
According to the technical scheme, the invention further sets that the acrylamide is one or a mixture of more than 2 of N-dodecyl acrylamide, N-octyl acrylamide, N-tert-octyl acrylamide, N-heptyl acrylamide, N-butyl acrylamide and N-tert-butyl acrylamide.
According to the invention, acrylamide is added as a functional monomer, and an amido bond is introduced while a hydrophobic group is introduced. The hydrophobic groups can bring about hydrophobic association, and the association is caused by aggregation of the hydrophobic groups due to hydrophobic interaction, so that intramolecular and intermolecular association is generated; the introduction of acrylamide monomers not only increases the hydrophilicity of the polymerization, but also provides a large number of hydrogen bond donors and acceptors. Hydrophobic association and hydrogen bond action enable polymer molecules to form a higher-level cross-linked network structure in and among the molecules, the structure is insensitive to external ions, and effects such as gel water loss and viscosity reduction on the surface of a raw pesticide can be effectively resisted; meanwhile, the structure can improve the cohesive force of the polymer gel, endows the polymer gel with moderate elasticity and ductility on a macroscopic scale, is easy to adhere to the original medicine, and has good dispersion and thickening effects.
According to the technical scheme, the initiator is one or a mixture of more than 2 of ammonium persulfate, azodiisobutyronitrile, diisopropyl peroxydicarbonate, benzoyl peroxide and di-tert-butyl peroxide.
The initiator is added in the invention document, and the initiator can promote mutual fusion between the catalyst and the reactants and promote mutual contact area between the reactants, thereby increasing the reaction rate and improving the activity content.
The invention further sets the dispersing agent as one or a mixture of more than 2 of fatty alcohol-polyoxyethylene ether sulfate, fatty alcohol-polyoxyethylene ether phosphate and tristyrylphenol-polyoxyethylene ether sulfate.
The dispersing agent is added in the document of the invention, improves the dispersing performance of the product, and extends the universality and applicability of the product.
The invention further sets the reaction monomer as one or a mixture of more than 2 of pentaerythritol triallyl ether, diethylene glycol diallyl ether and sucrose allyl ether.
The reaction monomer is added in the file of the invention, the flexibility of the molecular branch chain of the dispersant is increased, the coating property of the dispersant molecules on the original drug particles is enhanced, and the steric hindrance effect of the dispersant is improved.
Compared with the prior art, the invention has the advantages and beneficial effects that:
1. the addition of the above acids improves the dispersion and hydrophilic properties of the product.
2. According to the invention, acrylamide is added as a functional monomer, and an amido bond is introduced while a hydrophobic group is introduced. The hydrophobic groups can bring hydrophobic association, and the association is caused by aggregation of the hydrophobic groups due to hydrophobic interaction, so that intramolecular and intermolecular association is caused; the introduction of acrylamide monomers not only increases the hydrophilicity of the polymerization, but also provides a large number of hydrogen bond donors and acceptors. Hydrophobic association and hydrogen bond interaction enable polymer molecules to form a higher-level cross-linked network structure, the structure is insensitive to external ions, and effects of gel water loss, viscosity reduction and the like on the surface of the original medicine can be effectively resisted; meanwhile, the structure can improve the cohesive force of the polymer gel, endow the polymer gel with moderate elasticity and extensibility in a macroscopic view, and easily adhere to the original medicine, so that the polymer gel has good dispersion and thickening effects.
3. The initiator is added in the invention document, and the initiator can promote mutual fusion between the catalyst and the reactants and promote mutual contact area between the reactants, thereby increasing the reaction rate and improving the activity content.
4. The dispersing agent is added in the document of the invention, improves the dispersing performance of the product, and extends the universality and applicability of the product.
5. The reaction monomer is added in the file of the invention, the flexibility of the molecular branch chain of the dispersant is increased, the coating property of the dispersant molecules on the original drug particles is enhanced, and the steric hindrance effect of the dispersant is improved.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
The first embodiment is as follows:
adding 200KG acrylic acid, 50 KGN-dodecyl acrylamide, 10KG ammonium persulfate, 10KG fatty alcohol polyoxyethylene ether sulfate and 200KG butanone into a reaction kettle, carrying out nitrogen protection, stirring, heating to 50 ℃, and reacting for 0.5h; dripping 10KG pentaerythritol triallyl ether within the temperature range for 2h; then heating to 80 ℃, and preserving heat for 3 hours; and (3) cooling, adding 50KG sodium hydroxide, distilling to extract a solvent, and adding 200KG water to obtain the product dispersing thickener I.
Example two:
adding 250KG of acrylic acid, 50 KGN-dodecyl acrylamide, 10KG of ammonium persulfate, 10KG of fatty alcohol polyoxyethylene ether sulfate and 200KG of butanone into a reaction kettle, carrying out nitrogen protection, stirring and heating to 50 ℃, and reacting for 0.5h; dripping 10KG pentaerythritol triallyl ether within the temperature range for 2h; then heating to 80 ℃, and preserving heat for 3 hours; and cooling, adding 50KG sodium hydroxide, distilling to extract the solvent, and adding 200KG water to obtain the second product dispersing thickener.
Example three:
adding 250KG of acrylic acid, 50 KGN-dodecyl acrylamide, 10KG of azodiisobutyronitrile, 10KG of fatty alcohol-polyoxyethylene ether sulfate and 200KG of butanone into a reaction kettle, carrying out nitrogen protection, stirring and heating to 50 ℃, and reacting for 0.5h; dripping 10KG pentaerythritol triallyl ether within the temperature range for 2h; then heating to 80 ℃, and preserving heat for 3 hours; and cooling, adding 50KG sodium hydroxide, distilling to extract the solvent, and adding 200KG water to obtain the product dispersing thickener III.
Example four:
adding 250KG of acrylic acid, 50KG of N-dodecyl acrylamide, 10KG of azodiisobutyronitrile, 15KG of fatty alcohol polyoxyethylene ether phosphate and 200KG of butanone into a reaction kettle, carrying out nitrogen protection, stirring and heating to 50 ℃, and reacting for 0.5h; dripping 10KG pentaerythritol triallyl ether within the temperature range for 2h; then heating to 80 ℃, and preserving heat for 3 hours; and cooling, adding 50KG sodium hydroxide, distilling to extract the solvent, and adding 200KG water to obtain the product dispersing thickener IV.
Example five:
adding 250KG of acrylic acid, 50KG of N-octylacrylamide, 10KG of azodiisobutyronitrile, 15KG of fatty alcohol-polyoxyethylene ether phosphate and 200KG of butanone into a reaction kettle, carrying out nitrogen protection, stirring and heating to 50 ℃, and reacting for 0.5h; dripping 10KG pentaerythritol triallyl ether for 2h within the temperature range; then heating to 80 ℃, and preserving heat for 3 hours; and cooling, adding 50KG sodium hydroxide, distilling to extract the solvent, and adding 200KG water to obtain the product dispersing thickener V.
Example six:
adding 250KG of acrylic acid, 50KG of N-octylacrylamide, 10KG of azodiisobutyronitrile, 15KG of fatty alcohol polyoxyethylene ether phosphate ester salt and 200KG of butanone into a reaction kettle, carrying out nitrogen protection, stirring, heating to 50 ℃, and reacting for 0.5h; within the temperature range, 10KG sucrose allyl ether is dripped for 2h; then heating to 80 ℃, and preserving heat for 3 hours; and (3) cooling, adding 50KG sodium hydroxide, distilling to extract a solvent, and adding 200KG water to obtain a product, namely a dispersing thickener VI.
The application case is as follows:
1. 25% pyrazole SC
Figure BDA0003835277810000071
2. 22.5% pyrazole +7.5% Epoxiconazole SC
Figure BDA0003835277810000072
3. 48% clothianidin SC
Figure BDA0003835277810000073
Figure BDA0003835277810000081
4. 10% Cygongfu +20% thiamethoxam SC
Figure BDA0003835277810000082
The preparation method of the aqueous suspension formulation comprises the following steps: uniformly mixing the original medicine, the products of examples or comparative examples, propylene glycol, a defoaming agent, a stabilizing agent and water at one time, adding zirconium beads after shearing, then grinding for 1-2h until the particle diameter D90 is reduced to about 5 microns, filtering and discharging, adding xanthan gum and a preservative, shearing for 2min, and carrying out cold-hot storage and normal-temperature observation on the stability by dividing four samples.
The performance test method comprises the following steps:
(1) Normal temperature storage stability: the normal temperature storage stability test rule of the NYT1427-2007 pesticide is general, and no solid or oily substance is precipitated after 3 months under the room temperature condition of a sample;
(2) Low-temperature storage stability: according to the GB/T19137-2003 pesticide low-temperature stability determination method, no solid or oily substance is precipitated after 7 days at the temperature of 0 ℃ on a sample;
(3) High-temperature storage stability: according to the GB/T19136-2003 pesticide heat storage stability determination method, no solid or oily matter is precipitated after 14 days at 54 ℃, the decomposition rate of active ingredients is less than or equal to 10%, and the like;
(4) Particle size of the particles: the particle size growth rate before and after heat storage is less than or equal to 20 percent by referring to the operation of an LS-POPCP laser particle size analyzer and particle size detection;
(5) The suspension percentage test method comprises the following steps: refer to GBT 14825-2006 pesticide suspension rate determination method.
Comparing the results of the performance tests in the embodiment
Figure BDA0003835277810000091
Comparing the results of various performance tests in the implementation case II
Figure BDA0003835277810000092
Figure BDA0003835277810000101
Comparing the results of various performance tests in the implementation case III
Figure BDA0003835277810000102
Comparing the results of various performance tests in the implementation case
Figure BDA0003835277810000103
Examples 1-6 show that the dispersion thickening agent of the invention has high suspension percentage and good stability, and the preparation sample can still keep stable and has good fluidity under the condition of not adding a simple thickening agent. The preparation is kept stable in the grinding process, does not agglomerate or solidify and has good fluidity; the thermal stability and the grain diameter are well controlled, and the phenomenon of crystallization does not occur. It can be seen from the comparative examples that the market post product not in the formulation of the present invention has poor stability, poor suspension, low formulation viscosity, easy sedimentation and inconvenient use.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A preparation method of a special anti-settling dispersing thickener for pesticide preparations is characterized by comprising the following steps: the polymerization is derived from the following monomers, wherein the content range of each monomer is 20-40% of acid, 5% -10% of acrylamide, 1-2% of initiator, 1-2% of dispersant, 20-40% of solvent, 10-20% of reaction monomer, 5-8% of neutralizer and 20-25% of water;
a preparation method and application of a special anti-settling dispersion thickening agent for pesticide preparations are characterized by comprising the following steps: adding acid, acrylamide, an initiator, a dispersant and a solvent into a reaction kettle, carrying out nitrogen protection, stirring and heating to 50-70 ℃, and reacting for 0.5-1 h; dripping reaction monomers for 2-3 h within the temperature range; then heating to 80-90 ℃, and preserving heat for 3h; and cooling, adding a neutralizing agent, distilling to extract the solvent, and adding water to obtain the product dispersing thickener.
2. The method for preparing the anti-settling dispersing thickener according to claim 1, wherein said acid is one or a mixture of more than 2 of acrylic acid, methyl acrylate, methyl methacrylate and butyl methacrylate.
3. The method for preparing the anti-settling and dispersing thickener of claim 1, wherein the acrylamide is one or a mixture of 2 or more of N-dodecyl acrylamide, N-octyl acrylamide, N-t-octyl acrylamide, N-heptyl acrylamide, N-butyl acrylamide and N-t-butyl acrylamide.
4. The preparation method of the viscosity-reducing agricultural dispersant according to claim 1, wherein the initiator is one or a mixture of more than 2 of ammonium persulfate, azobisisobutyronitrile, diisopropyl peroxydicarbonate, benzoyl peroxide and di-tert-butyl peroxide.
5. The preparation method of the viscosity-reducing agricultural dispersant according to claim 1, wherein the dispersant is one or a mixture of more than 2 of fatty alcohol-polyoxyethylene ether sulfate, fatty alcohol-polyoxyethylene ether phosphate, tristyrylphenol-polyoxyethylene ether sulfate.
6. The preparation method of the viscosity-reducing agricultural dispersant according to claim 1, characterized in that the solvent is one or a mixture of more than 2 of butanone, toluene, cyclohexanone and mineral spirits.
7. The preparation method of the viscosity-reducing agricultural dispersant according to claim 1, wherein the dropping temperature is 50 ℃ to 70 ℃.
8. The preparation method of the viscosity-reducing agricultural dispersant according to claim 1, wherein the reactive monomer is one or a mixture of more than 2 of pentaerythritol triallyl ether, diethylene glycol diallyl ether, or sucrose allyl ether.
9. The preparation method of the viscosity-reducing agricultural dispersant according to claim 1, wherein the neutralizing agent is one or a mixture of more than 2 of sodium hydroxide, potassium hydroxide, sodium carbonate, sodium bicarbonate and potassium carbonate.
10. The use of a complex alcohol ether carboxylate surfactant according to claim 1, wherein the aqueous suspension comprises: 25% pyrazole SC, 22.5% pyrazole +7.5% epoxiconazole SC, 48% clothianidin SC, 10% cyhalothrin +20% thiamethoxam SC, all aqueous suspensions of the same type and series.
CN202211086313.4A 2022-09-06 2022-09-06 Preparation method and application of special anti-settling dispersion thickening agent for pesticide preparation Pending CN115304722A (en)

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