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Chlorfenapyr microcapsule suspension and preparation method thereof

A technology of microcapsule suspension and chlorfenapyr, which is applied in botany equipment and methods, insecticides, biocides, etc., can solve the problems of consumption of petrochemical resources and short duration, etc., and achieve good and long-lasting insecticidal effect Long-term, stable performance

Inactive Publication Date: 2012-07-11
GUANGDONG ZHONGXUN AGRI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the current use of chlorfenapyr to control pests has a short duration, which has caused farmers to frequently use the drug and continuously increase the dosage of the pesticide. In many areas, resistance has been caused. Therefore, prolonging the duration of the pesticide has become an urgent problem to be solved.
In addition, the dosage form currently used for chlorfenapyr is still mainly emulsifiable concentrate. Due to the use of a large amount of organic solvents, it not only consumes a large amount of petrochemical resources, but also causes great pressure on the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: 2% chlorfenapyr microcapsule suspension.

[0033] Preparation method of urea-formaldehyde resin prepolymer aqueous solution: dissolve urea into formaldehyde, the weight ratio of urea and formaldehyde is 1:1.5, adjust the pH value to 8 with sodium hydroxide, stir at a low speed at a temperature of 80°C, and keep warm for 1 hours, a viscous and transparent urea-formaldehyde resin is generated, and deionized water equal to the total weight of urea and formaldehyde is added, and stirred at a low speed to obtain a transparent urea-formaldehyde resin prepolymer aqueous solution.

[0034] Dissolve 2% chlorfenapyr completely in 5% xylene at room temperature, add 5% emulsifier alkylphenol polyoxyethylene ether and appropriate amount of deionized water while stirring, and shear at 2000 rpm After 10 minutes, a stable O / W emulsion was obtained. Reduce the shearing speed, add 5% urea-formaldehyde resin prepolymer aqueous solution while stirring, add 3% acetic acid in ba...

Embodiment 2

[0035] Example 2: 5% chlorfenapyr microcapsule suspension.

[0036] Preparation method of urea-formaldehyde resin prepolymer aqueous solution: dissolve urea into formaldehyde, the weight ratio of urea and formaldehyde is 1:2.5, adjust the pH value to 8 with sodium hydroxide, stir at a low speed at a temperature of 80°C, and keep warm for 1 hours, a viscous and transparent urea-formaldehyde resin is generated, and deionized water equal to the total weight of urea and formaldehyde is added, and stirred at a low speed to obtain a transparent urea-formaldehyde resin prepolymer aqueous solution.

[0037]Dissolve 5% chlorfenapyr completely in 10% xylene at room temperature, add 8% emulsifier castor oil polyoxyethylene ether and appropriate amount of deionized water while stirring, and cut 20 at 2000 rpm. Minutes, a stable O / W emulsion was obtained. Reduce the shear speed, add 9% urea-formaldehyde resin prepolymer aqueous solution while stirring, add 3% acetic acid in batches with...

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PUM

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Abstract

The invention discloses a chlorfenapyr microcapsule suspension and a preparation method thereof. The chlorfenapyr microcapsule suspension consists of the following components in percentage by weight: 1 to 10 percent of chlorfenapyr, 3 to 20 percent of capsule core solvent, 5 to 30 percent of capsule wall material, 3 to 10 percent of emulsifying agent, 1 to 5 percent of dispersing agent, 0.1 to 10 percent of pH regulator and the balance of deionized water. The invention also discloses the preparation method for the chlorfenapyr microcapsule suspension. The product has the advantages of low cost, high stability, excellent efficacy, long duration, low toxicity and little environment pollution, is safe to use, and can meet the requirement of pollution-free agricultural production.

Description

technical field [0001] The invention relates to an agricultural insecticide and a preparation method thereof, in particular to a chlorfenapyr microcapsule suspension and a preparation method thereof. Background technique [0002] Chemical control is an important means of preventing and controlling agricultural and forestry diseases and insect pests. Chemical pesticides play a very important role in increasing agricultural production and income. However, the use of pesticides, while ensuring food safety production, also brings a series of environmental and Social Issues. Not only due to the chemical pesticide itself, but also to a large extent due to the unreasonable processing and application methods of pesticide formulations. According to reports, the utilization rate of conventional pesticides is only 20% to 30%, and the loss rate through various channels is as high as 50% to 60%. This is not only a waste of economy, but also causes extensive environmental pollution. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/36A01N25/04A01P7/04
Inventor 王龙江孟宪秋刘华金曹希敏袁彩斌
Owner GUANGDONG ZHONGXUN AGRI TECH
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