A kind of pymetrozine suspension concentrate and preparation method thereof

A technology of suspending agent and pymetrozine, which is applied in the field of pesticide application, can solve the problems of high price and achieve the effect of low product cost, good permeability and easy packaging

Active Publication Date: 2011-12-21
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dispersing effect of the pymetrozine suspension concentrate researched and developed abroad is obvi

Method used

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  • A kind of pymetrozine suspension concentrate and preparation method thereof
  • A kind of pymetrozine suspension concentrate and preparation method thereof
  • A kind of pymetrozine suspension concentrate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 120

[0043] Embodiment 120% pymetrozine suspension concentrate

[0044] Get 20g of pymetrozine raw powder, 15g of dispersant carboxylate terpolymer, 2g of thickener xanthan gum XG, 10g of stabilizer phenyl glycidyl ether, silicone defoamer silicone oil (dimethyl silicone oil) 6g, 4g of osmotic agent antifreeze propylene glycol, appropriate amount of pH regulator to make the pH value of the suspending agent 8, add deionized water to 100g. After mixing evenly, ball mill in a ball mill for 2 to 3 hours to make the particle size below 3um.

[0045] Dispersant carboxylate terpolymer preparation method is:

[0046] a) Add 50g of water, 50g of methanol and 6g of chain transfer agent dodecylmercaptan into the reaction flask, stir and heat to 60-100°C;

[0047] b) Add 10g styrene, 70g methacrylic acid, 20g hydroxypropyl acrylate and initiator potassium persulfate solution dropwise, dropwise within 1 to 5 hours, then keep warm for 2 to 10 hours; the amount of potassium persulfate is 6g , ...

Embodiment 225

[0052] Embodiment 225% pymetrozine suspension concentrate

[0053] Each component by weight is 25g of pymetrozine raw powder, 15g of dispersant carboxylate terpolymer, 3g of thickener hydroxymethyl cellulose, 2.5g of stabilizer butyl glycidyl ether, defoamer ten Trialkanoic acid 1g, antifreeze agent glycerin 3g, pH adjuster appropriate amount to make the pH value of the suspending agent 7, add deionized water to 100g. After mixing evenly, ball mill in a ball mill for 2 to 3 hours to make the particle size below 3um. The preparation method of carboxylate terpolymer dispersant is the same as in Example 1.

[0054] The suspending agent prepared by the formula has a suspension rate of 97.80%, good dispersibility and an average particle diameter of 2.3um.

Embodiment 325

[0055] Embodiment 325% pymetrozine suspension concentrate

[0056] Each component by weight is 25g of pymetrozine raw powder, 10g of dispersant carboxylate terpolymer, 3g of thickener methyl cellulose, 2.5% of stabilizer phenyl glycidyl ether, defoamer saturated fatty acid Pentadecanoic acid 1g, antifreeze agent glycerin 3%, pH adjuster appropriate amount to make the pH value of the suspending agent 7, add deionized water to 100g. After mixing evenly, ball mill in a ball mill for 2 to 3 hours to make the particle size below 3um.

[0057] Dispersant carboxylate terpolymer preparation method is:

[0058] a) Add 120g of water, 80g of ethanol and 10g of chain transfer agent sodium formate into the reaction flask, stir and heat to 60-100°C;

[0059] b) 20g styrene, 50g methacrylic acid, 30g hydroxypropyl acrylate and initiator hydrogen peroxide-ferrous salt solution are added dropwise, and the addition is completed within 1 to 5 hours, and then the insulation reaction is carried ...

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Abstract

The invention belongs to the technical field of pesticide application, and discloses pymetrozine suspension and a preparation method thereof. The preparation method comprises the following steps of: adding water into 10 to 60 parts of pymetrozine, 1 to 30 parts of dispersant, 0.1 to 10 parts of stabilizer, 0.1 to 10 parts of thickener, 0.1 to 10 parts of defoaming agent, 0.1 to 10 parts of anti-freezing agent and 0.1 to 10 parts of other auxiliary agents till complementing to 100 weight parts, performing ball milling for 2 to 3 hours in a ball mill till the suspension particle diameter of the materials is 1 to 3 microns, filtering, and thus obtaining the pymetrozine suspension. The particle diameter distribution of the pymetrozine water suspension is uniform, and 95 percent of average particle diameter is between 2 and 3 microns; and the suspension has good stability and good thermal storage stability, and the normal-temperature suspension rate reaches over 96 percent.

Description

technical field [0001] The invention belongs to the technical field of pesticide application, and relates to a pesticide formulation containing pymetrozine, in particular to a suspension of pymetrozine and a preparation method thereof. Background technique [0002] In the 21st century, the use of pesticides is still one of the main means for humans to fight against diseases, insect pests and weeds in agricultural production. With the extensive use of pesticides, a large number of organic solvents have polluted the environment. With the continuous enhancement of people's environmental protection awareness and safety knowledge, pesticide formulations have become water-based, granular, slow-release, multi-functional, and labor-saving. And the direction of environmental protection, especially the dosage form of water suspension is more and more loved and valued by people. Pesticide suspension concentrate (Suspension Concentrate, SC) is an environmentally friendly and environmen...

Claims

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Application Information

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IPC IPC(8): A01N25/04A01N43/707A01P7/00
Inventor 任天瑞何华雄秦跃军
Owner SHANGHAI NORMAL UNIVERSITY
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