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Preparation method of cyhalothrin and chlorfluazuron microcapsule suspension-suspension and microcapsule suspension-suspension

A technology of high-efficiency cyhalothrin and microcapsule suspension, which is applied in the field of pesticides, can solve the problems of difficult to meet the preparation requirements of pesticides for the prevention and control of crop pests, poor pest effect, and difficult storage, etc., to achieve reduced dosage, good storage stability, The effect of reducing the number of medications

Inactive Publication Date: 2017-02-15
北京明德立达农业科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-efficiency cyhalothrin microcapsule suspension obtained by the traditional preparation method is prone to agglomeration and solidification, which makes it difficult to store and has poor control effects on crop pests. It is difficult to meet the preparation requirements of pesticides for crop pest control

Method used

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  • Preparation method of cyhalothrin and chlorfluazuron microcapsule suspension-suspension and microcapsule suspension-suspension
  • Preparation method of cyhalothrin and chlorfluazuron microcapsule suspension-suspension and microcapsule suspension-suspension
  • Preparation method of cyhalothrin and chlorfluazuron microcapsule suspension-suspension and microcapsule suspension-suspension

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preparation example Construction

[0019] The first aspect of the present disclosure: provide a preparation method of lambda-cyhalothrin·chlorfluazuron microcapsule suspension-suspension agent, the method comprises the following steps: a, mixing amino resin prepolymer aqueous solution with lambda-cyhalothrin The ester emulsifiable oil is (1-5): 1 mixed by weight to obtain the first material; b, the first material obtained in step a is mixed with a buffer solution to obtain the second material, and the pH of the second material value is 5-7; c, the second material obtained in step b is mixed with an acidic solution to obtain a third material, and the pH value of the third material is 3-4; d, at a temperature of 40-70 Under the condition of ℃, the third material obtained in step c was processed for 2-7 hours to obtain the fourth material; e, the fourth material obtained in step d was mixed with chlorfluazuron suspending agent and emulsifying dispersant according to The weight ratio is 1:(0.1-1):(0.01-2) and mixed...

Embodiment 1

[0038] 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 molar ratio of formaldehyde to melamine is 1:0.5, and water and formaldehyde The weight ratio is 2.8:1.

[0039] 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.

[0040] Mix the melamine-formaldehyde resin prepolymer aqueous solution and efficient cyhalothrin emulsifiable concentrate at a weight ratio of 4:1 at a stirring 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 th...

Embodiment 2

[0044] 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 molar ratio of formaldehyde to melamine is 1:1, and water and formaldehyde The weight ratio is 3.5:1.

[0045] 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.

[0046] Mix melamine-formaldehyde resin prepolymer aqueous solution and efficient cyhalothrin emulsifiable concentrate at a weight ratio of 2:1 at a stirring 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 above-mentioned first material within 1 hour, and ...

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Abstract

The invention relates to a preparation method of a cyhalothrin and chlorfluazuron microcapsule suspension-suspension and the microcapsule suspension-suspension. The method comprises the following steps: a, an aqueous solution of an amino resin prepolymer is mixed with cyhalothrin emulsifiable concentrate, and a first material is obtained; b, the first material is mixed with a buffer solution, and a second material with the pH value being 5-7 is obtained; the second material is mixed with an acid solution, and a third material with the pH value being 3-4 is obtained; d, the third material is processed at the temperature of 40-70 DEG C for 2-7 h, and a fourth material is obtained; e, the fourth material is mixed with a chlorfluazuron suspension and an emulsion dispersant, and the cyhalothrin and chlorfluazuron microcapsule suspension-suspension is obtained. The cyhalothrin and chlorfluazuron microcapsule suspension-suspension prepared with the method has better storage stability and can control crop pests in a slow-release and long-acting manner, the use times and use amount are reduced, the cost is saved, and environmental pollution is reduced.

Description

technical field [0001] The present disclosure relates to the field of pesticides, in particular, to a preparation method of lambda-cyhalothrin·chlorfluazuron microcapsule suspension-suspension agent and the microcapsule suspension-suspension agent. Background technique [0002] Lambda-cyhalothrin is a broad-spectrum insecticide, which can inhibit the conduction of insect nerve axons, and has the functions of avoiding, knocking down and poisoning insects, and can also be used with most fungicides and insecticides. , herbicide mixed, have better control effect. The active ingredients of traditional pesticide formulations are prone to failure under the influence of external environment, such as sunshine, soil pH, etc., and the duration of effect is short, which reduces the control effect of pesticides. The existing preparations containing lambda-cyhalothrin on the market all contain a large amount of organic solvents, polluting the environment. In addition, lambda-cyhalothrin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/04A01N25/28A01N53/08A01N47/34A01P7/04
CPCA01N25/04A01N25/28A01N47/34A01N53/00A01N2300/00
Inventor 高敬雨马超徐妍东琴潘静
Owner 北京明德立达农业科技有限公司
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