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Microcapsule made from avoparcin and its interface polymeric production

An interfacial polymerization method and the technology of abamectin, applied in the field of biological source pesticides and water-based slow-release preparations, can solve the problems of high cost, high decomposition cost, and poor efficacy of soil application, and achieve low cost, The effect of strong market competitiveness

Inactive Publication Date: 2006-08-16
GUANGXI RES INST OF CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main dosage form of its pesticide preparation is 1-5% emulsifiable concentrate, which has the following problems: use a large amount of organic solvents; add stabilizers to prevent high cost of decomposition; poor soil colonization, and poor efficacy of soil application
However, this method is not suitable for the preparation of pesticides containing amine groups, hydroxyl groups and acid sensitivity. There are many such pesticides, such as abamectin containing primary and secondary hydroxyl groups.
Therefore, to prepare microcapsules of such pesticides, only complex coacervation, urea-formaldehyde or melamine-formaldehyde resin in-situ polymerization, and emulsion polymerization can be used. These preparation methods are complicated in process, low in encapsulation efficiency, and require more capsules. The cost is high, and the prepared pesticide microcapsules are difficult to commercialize

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve 2g of avermectin in 2g of dichloroethane and 0.8g of alkyl diisocyanate to prepare an oily solution; dissolve 1g of polyvinyl alcohol in 180g of water to prepare an aqueous solution of polyvinyl alcohol. At room temperature, add 130g of polyvinyl alcohol solution, under high-speed shearing, add the above-mentioned oily liquid, when the particle size of the emulsion is less than 1 micron, add 50g of polyvinyl alcohol solution containing 0.4g of triethylenetetramine, keep it for more than 20 minutes, and then prepare The avermectin microcapsules are obtained, the particle diameter is 0.6-6 microns, most of which are 1-3 microns; water is added to 200g to obtain 1% abamectin microcapsules aqueous suspension.

Embodiment 2

[0023] Dissolve 20g of abamectin in 25g of isophorone and 8g of alkyl diisocyanate to prepare an oily solution; dissolve 1g of polyvinyl alcohol in 180g of water to prepare an aqueous solution of polyvinyl alcohol. At room temperature, add 130g of polyvinyl alcohol solution, under high-speed shearing, add the above-mentioned oily liquid, when the particle size of the emulsion is less than 1.5 microns, add 50g of polyvinyl alcohol solution containing 3.5g of triethylenetetramine, and keep it for more than 25 minutes to prepare The avermectin microcapsules are obtained, the particle diameter is 0.8-10 microns, most of which are 1-5 microns; water is added to 200g to obtain 10% avermectin microcapsules aqueous suspension.

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PUM

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Abstract

An abamectin microsoftgel for preventing and eliminating the pests of agricultural crops is prepared from the abamectin as core and wall material by interface polymerization method. Its advantages are low cost, slow release and low poison.

Description

technical field [0001] The invention relates to abamectin pesticide microcapsules, which belong to biological source pesticides; the invention relates to an interface polymerization preparation method of pesticide microcapsules, in particular to an aqueous sustained-release preparation technology. Background technique [0002] Abamectin is a metabolite of microorganisms and has 8 isomers, among which B1a is the most effective. It is widely used in the control of various parasites and more than 80 kinds of crop pests. It is an excellent broad-spectrum insecticide and acaricide . At present, the main dosage form of its pesticide preparation is 1-5% emulsifiable concentrate, which has the following problems: a large amount of organic solvent is used; the cost of adding a stabilizer to prevent decomposition is high; the soil colonization is poor, and the efficacy of soil application is not good. Recently, some other preparations have appeared, although they have certain advanta...

Claims

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Application Information

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IPC IPC(8): A01N43/90A01N25/28
Inventor 莫友彬廖沛峰卢秀清赖开平陆敏兴罗桂新周微
Owner GUANGXI RES INST OF CHEM IND CO LTD
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