High-efficient cyhalothrin microcapsule suspending agent and preparation method thereof

A technology of high-efficiency cyhalothrin and microcapsule suspension agent, which is applied in the fields of botanical equipment and methods, insecticides, acaricides, etc., can solve problems such as short duration, achieve long duration and save man-hours , exposure toxicity and odor reduction effects

Inactive Publication Date: 2013-01-02
GUANGDONG ZHONGXUN AGRI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the duration of the currently used Kungfu permethrin to control pests is too short, causing farmers to frequently use pesticides and continuously increase the dosage of pesticides. Many areas have caused the emergence of drug resistance. Therefore, prolonging the duration of the pesticide has become an urgent problem to be solved.
In addition, the dosage form currently used for lambda-cyhalothrin 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

[0027] Example 1: 2% lambda-cyhalothrin microcapsule suspension.

[0028] 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 60°C, and keep warm for 0.5 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.

[0029] Dissolve 2% lambda-cyhalothrin completely in 5% xylene at room temperature, add 10% urea-formaldehyde resin prepolymer aqueous solution while stirring, and shear at 2000 rpm for 10 minutes to obtain a stable O / W lotion. Reduce the rotation speed to 1000 rpm, add dilute hydrochloric acid in 5 batches within 1 hour to adjust the pH value to 2.0, polycondensation reaction o...

Embodiment 2

[0030] Example 2: 5% lambda-cyhalothrin microcapsule suspension.

[0031] Preparation method of urea-formaldehyde resin prepolymer aqueous solution: dissolve urea into formaldehyde, the weight ratio of urea and formaldehyde is 1:2, adjust the pH value to 9 with sodium hydroxide, stir at a low speed at a temperature of 80°C, and keep warm for 4 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.

[0032] Dissolve 5% lambda-cyhalothrin completely in 12% xylene at room temperature, add 25% urea-formaldehyde resin prepolymer aqueous solution while stirring, and shear at 1500 rpm for 20 minutes to obtain a stable O / W lotion. Reduce the rotation speed to 800 rpm, add dilute hydrochloric acid in 5 batches within 1 hour to adjust the pH value to 2.0, polycondensation reaction occu...

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PUM

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Abstract

The invention discloses a high-efficient cyhalothrin microcapsule suspending agent and a preparation method thereof; the suspending agent comprises the following components by weight: 1%-10% of high-efficient cyhalothrin, 3%-20% of a capsule core solvent, 5%-30% of a capsule wall material, 3%-10% of an emulsifier, 1%-5% of a dispersant, 0.1%-10% of a pH adjusting agent, and the balance of deionized water. The invention also discloses the preparation method of the high-efficient cyhalothrin microcapsule suspending agent. The product of the invention is low in cost, stable in performance, good in insecticidal effect, long in persistent period, low in toxicity, friendly to environment, and safe for people and livestock, and can meet the requirements of insect pollution-free control.

Description

technical field [0001] The invention relates to an agricultural insecticide and a preparation method thereof, in particular to a high-efficacy-cyhalothrin 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 po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N53/08A01N25/04A01P7/04A01P7/02
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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