Azadirachtin microemulsion and preparation method thereof

A technology of azadirachtin and microemulsion, which is applied in the directions of botanical equipment and methods, biocides, biocides, etc., can solve the organic solvent pollution of azadirachtin emulsifiable concentrate, the insoluble of azadirachtin in water, and the instability in water. and other problems, to achieve the effect of reducing environmental pollution, safe storage and use, and good stability

Inactive Publication Date: 2013-09-18
THE RES INST OF RESOURCES INSECTS RIRI OF THE CHINESE ACADEMY OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of azadirachtin emulsifiable oil formulation organic solvent pollution, azadirachtin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A. Prepare 1000g of components according to the following mass ratio:

[0037] Commercially available azadirachtin powder 0.5%

[0038] n-Butanol 18%

[0039] Octylphenol ethoxylate 15%

[0040] Synergist 2%

[0041] Deionized water 64.5%;

[0042] B. Add the azadirachtin powder prepared in step A into n-butanol solvent, stir until completely dissolved, and become an oil phase;

[0043] C. In the oil phase obtained in step B, add the octylphenol polyoxyethylene ether emulsifier prepared in step A, stir evenly, and obtain a mixed solution;

[0044] D. Add the synergist prepared in step A into the mixed solution obtained in step C and stir evenly to obtain the mixed material;

[0045] E, add the prepared deionized water of step A in the mixed material obtained in step D, after being mixed uniformly, continue to stir for 10min, promptly obtain the azadirachtin microemulsion 1000g that mass concentration is 0.5%;

[0046] The stirring speed of the above steps is 80 rp...

Embodiment 2

[0048] A. Prepare 1000g of components according to the following mass percentages:

[0049] Commercially available azadirachtin powder 2%

[0050] Ethyl acetate and ethanol 20%

[0051] Tween-20 18%

[0052] Synergistic Sensitivity 3%

[0053] Deionized water 57%;

[0054] B. Add the azadirachtin powder prepared in step A into ethyl acetate and ethanol solvent with a volume ratio of 1:2, stir until completely dissolved, and become an oil phase;

[0055] C. In the oil phase obtained in step B, add the Tween-20 emulsifier prepared in step A and stir evenly to obtain a mixed solution;

[0056] D. Add the synergist prepared in step A to the mixed solution obtained in step C and stir evenly to obtain the mixed material;

[0057]E, add the deionized water prepared by step A in the mixed material obtained in step D, after mixing evenly, continue to stir for 15min to obtain 1000g of azadirachtin microemulsion with a mass concentration of 2%;

[0058] The stirring speed of the ab...

Embodiment 3

[0060] A. Prepare 1000g of components according to the following mass percentages:

[0061] Commercially available azadirachtin powder 5%

[0062] Isopropanol and Ethylene Glycol 25%

[0063] Polyethylene glycol octylphenyl ether 20%

[0064] 37% formaldehyde solution 5%

[0065] Deionized water 45%;

[0066] B. Add the azadirachtin powder prepared in step A into a mixed solvent of isopropanol and ethylene glycol with a volume ratio of 1:8, stir until completely dissolved, and become an oil phase;

[0067] C. In the oil phase obtained in step B, add the polyethylene glycol octyl phenyl ether emulsifier prepared in step A, stir evenly, and obtain a mixed solution;

[0068] D, the mass concentration prepared in step A is that the formaldehyde aqueous solution synergist of 37% is added in the mixed solution obtained in step C, stir evenly, obtain mixed material;

[0069] E, add the prepared deionized water of step A in the mixed material obtained in step D, after being mixed...

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PUM

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Abstract

The invention provides an azadirachtin microemulsion and a preparation method thereof. The azadirachtin microemulsion comprises the following components according to mass ratio: 0.5-5% of azadirachtin powder, 18-25% of a solvent, 15-20% of an emulsifying agent, 1-5% of a synergist and 64.5-45% of de-ionized water. The preparation method comprises the following steps of: adding the azadirachtin powder into the solvent and agitating and dissolving into an oil phase; and then sequentially adding the emulsifying agent, the synergist and the de-ionized water, and mixing uniformly to prepare the azadirachtin microemulsion. The azadirachtin microemulsion disclosed by the invention is good in stability and is good for improving the stability of azadirachtin in water; the transferring efficiency is high so that azadirachtin liquid can be easily paved on a leaf surface, the safety is high, the volatilization of pesticide steam is inhibited, the environmental pollution is alleviated, the production, transportation, storage and utilization are safe; the azadirachtin microemulsion is easy to process and produce, and the investment and equipment costs are very low.

Description

technical field [0001] The invention relates to a biopesticide insecticide, in particular to an azadirachtin microemulsion and a preparation method thereof. Background technique [0002] Neem is a plant of the family Meliaceae, which contains more than 300 active ingredients, has strong biological activity against more than 200 insects (including almost all important agricultural, forestry, storage, and sanitary pests), and is harmless to higher animals. The natural enemies are relatively safe, and the control objects are not easy to produce resistance, so it is the most widely researched and used biological pesticide. It has two obvious characteristics: one is that it can be used as an afforestation tree species to prevent and control desertification in hot and dry areas, and it plays an important role in greening deserts; the other is that its seeds can be used to prepare pollution-free biological pesticides. However, the current utilization of azadirachtin is still in th...

Claims

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Application Information

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IPC IPC(8): A01N25/04A01N43/90A01P7/00
Inventor 段琼芬王有琼马李一张重权
Owner THE RES INST OF RESOURCES INSECTS RIRI OF THE CHINESE ACADEMY OF FORESTRY
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