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Method for preparation of microcapsule suspension-suspending agent containing thiacloprid and lambda-cyhalothrin and microcapsule suspension-suspending agent thereof

A technology of high-efficiency cyhalothrin and microcapsule suspension, which is applied in the field of pesticides, can solve the problems of low chemical storage stability, insufficient synergistic effect, and uneven spraying of chemicals, so as to reduce the dosage and frequency of medication, reduce the Pollution, cost saving effects

Inactive Publication Date: 2019-03-29
江苏明德立达作物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are multiple defects in the existing combined medicament of lambda-cyhalothrin and thiacloprid, such as wettable powder, which is easy to cause product caking, is not suitable for dispersion and suspension in water, precipitation in the sprayer makes the spraying of the medicament uneven, and The storage stability of existing medicaments is low, and the synergistic effect is not obvious enough

Method used

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  • Method for preparation of microcapsule suspension-suspending agent containing thiacloprid and lambda-cyhalothrin and microcapsule suspension-suspending agent thereof
  • Method for preparation of microcapsule suspension-suspending agent containing thiacloprid and lambda-cyhalothrin and microcapsule suspension-suspending agent thereof
  • Method for preparation of microcapsule suspension-suspending agent containing thiacloprid and lambda-cyhalothrin and microcapsule suspension-suspending agent thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Mix melamine, formaldehyde and water and react for 1.5 hours at a pH value of 8 and a temperature of 70°C to obtain a melamine-formaldehyde resin prepolymer aqueous solution, wherein the weight ratio of formaldehyde, melamine and water is 1:2.2:2.5 .

[0038] Evenly mix lambda-cyhalothrin, 200# solvent oil and sorbitan monostearate polyoxyethylene ether to obtain lambda-cyhalothrin emulsifiable concentrate, wherein, said lambda-cyhalothrin, 200 #The weight ratio of solvent oil and sorbitan monostearate polyoxyethylene ether is 1:2.5:0.05.

[0039] Mix the melamine-formaldehyde resin prepolymer aqueous solution and efficient cyhalothrin emulsifiable concentrate in a weight ratio of 4: 1, and stir evenly at a speed of 2000 rpm to obtain the first material; then at room temperature, adjust the pH value to 4.5. The acetic acid-sodium acetate buffer solution whose total concentration of the buffer pair is 2% by weight is uniformly added to the first material within 1 hour, ...

Embodiment 2

[0043] Mix melamine, formaldehyde and water, and react for 1.5h at a pH value of 8 and a temperature of 70°C to obtain a melamine-formaldehyde resin prepolymer aqueous solution, wherein the weight ratio of formaldehyde, melamine and water is 1:4.0: 3.3.

[0044] Mix lambda-cyhalothrin, 150# solvent oil and sodium lignosulfonate evenly to obtain lambda-cyhalothrin emulsifiable concentrate, wherein the lambda-cyhalothrin, 150# solvent oil and lignosulfonic acid The weight ratio of sodium is 1:0.5:0.1.

[0045]Mix the melamine-formaldehyde resin prepolymer aqueous solution and efficient cyhalothrin emulsifiable concentrate in a weight ratio of 2: 1, and stir evenly at a speed of 1500 rpm to obtain the first material; then at room temperature, adjust the pH value to 3. The acetic acid-sodium acetate buffer solution whose total concentration of the buffer pair is 2% by weight is uniformly added to the first material within 1 hour, mixed evenly at a stirring speed of 1100 rpm, and ...

Embodiment 3

[0049] Mix melamine, formaldehyde and water, and react for 1.5 hours at a pH value of 8 and a temperature of 70°C to obtain a melamine-formaldehyde resin prepolymer aqueous solution, wherein the weight ratio of formaldehyde, melamine and water is 1:6:5 .

[0050] The preparation method of lambda-cyhalothrin emulsifiable concentrate is the same as embodiment 1, wherein, the weight ratio of described lambda-cyhalothrin, 200# solvent naphtha and sorbitan monostearate polyoxyethylene ether is 1 :3:0.15.

[0051] Mix melamine-formaldehyde resin prepolymer aqueous solution and efficient cyhalothrin emulsifiable concentrate in a weight ratio of 3: 1, stir evenly at a speed of 2500 rpm to obtain the first material; then at room temperature, adjust the pH value to 3.8. The acetic acid-sodium acetate buffer solution whose total concentration of the buffer pair is 0.55% by weight is uniformly added to the first material within 1.5 hours, mixed evenly at a stirring speed of 1200 rpm, and...

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Abstract

The invention relates to a method for preparation of a microcapsule suspension-suspending agent containing thiacloprid and lambda-cyhalothrin and the microcapsule suspension-suspending agent thereof.The method includes: a. mixing an amino-formaldehyde resin prepolymer aqueous solution and lambda-cyhalothrin missible oil in a weight ratio of (1-5):1 to obtain a first material; b. adding a buffer solution into the first material and mixing the substances evenly to regulate the pH value of the mixed solution to 4-7, thus obtaining a second material; c. adding an acidic pH regulator into the second material, mixing the substances evenly, and regulating the pH value of the mixed solution to 3-4, thus obtaining a third material; d. subjecting the third material to curing polycondensation so asto obtain a cured polycondensation product, and adjusting the pH value of the cured polycondensation product to 6-8, thus obtaining a fourth material; and e. mixing the fourth material with a thiacloprid suspending agent evenly in a weight ratio of 1:(0.1-1). The microcapsule suspension-suspending agent containing thiacloprid and lambda-cyhalothrin prepared by the method disclosed in the inventionhas a long lasting period for control of crop pests, and has storage stability.

Description

Technical field [0001] The present invention relates to the technical field of pesticides, and specifically, to a method for preparing a microcapsule suspension-suspension agent containing thiacloprid and beta-cyhalothrin and a microcapsule suspension-suspension agent. Background technique [0002] Beta-cyhalothrin is an insecticide that has the effects of repelling, knocking down and poisoning insects. Traditional high-efficiency cyhalothrin formulations are prone to failure under the influence of external environments, such as sunlight, soil pH, etc., and have a short duration of effect, thus reducing the pesticide's control effect. In addition, other preparations of lambda-cyhalothrin on the market contain large amounts of organic solvents, which pollute the environment. High-efficiency cyhalothrin microcapsule suspension obtained by traditional preparation methods is prone to agglomeration and coagulation, making it difficult to store, has poor effect in preventing and ...

Claims

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Application Information

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IPC IPC(8): A01N47/40A01N53/08A01N25/28A01N25/04A01P7/04B01J13/14
CPCA01N25/04A01N25/28A01N47/40A01N53/00B01J13/14
Inventor 高敬雨刘润峰潘静罗湘仁丁文明陈坤张孝武
Owner 江苏明德立达作物科技有限公司
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