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Beta-cypermethrin microcapsule and preparation method thereof

A technology of high-efficiency cypermethrin and microcapsules, applied in botany equipment and methods, chemicals for biological control, animal repellents, etc., can solve problems such as easy decomposition, skin and mucous membrane irritation, and high toxicity of aquatic organisms , to achieve the effects of good environmental compatibility, cost-saving prevention and control, and excellent long-lasting performance

Inactive Publication Date: 2016-05-11
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main processing formulations of lambda-cypermethrin are emulsifiable concentrate, microemulsion and water emulsion, and there are following deficiencies in use: 1) it is very easy to decompose in alkaline environment; It is beneficial to use in the home environment; 3) It is highly toxic to aquatic organisms, and long-term use will have adverse effects on the water environment; 4) It is toxic to bees and silkworms, and cannot be used in and around bee farms and mulberry gardens

Method used

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  • Beta-cypermethrin microcapsule and preparation method thereof
  • Beta-cypermethrin microcapsule and preparation method thereof
  • Beta-cypermethrin microcapsule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Weigh 0.20g of the original drug of beta-cypermethrin, dissolve it in 6.00g of dichloromethane, stir until the original drug is completely dissolved, then add 0.30g of ethyl cellulose into the solution, stir until the ethyl cellulose is completely dissolved, and prepare Clear solution A containing beta-cypermethrin and ethylcellulose;

[0026] 2) Weigh 13.10g of deionized water into a beaker, add 0.40g of emulsifier Tween-60, and then magnetically stir until the emulsifier is completely dissolved to make a transparent solution B containing emulsifier;

[0027] 3) Mix the transparent solution A obtained in step 1) with the transparent solution B obtained in step 2), and cut at high speed (12000 rpm) for 8 minutes with a high-speed shearing machine to obtain an emulsion;

[0028] 4) removing dichloromethane from the emulsion obtained in step 3) by a rotary evaporator at 40° C. to obtain a suspension containing microspheres;

[0029] 5) The microsphere-containing suspe...

Embodiment 2

[0031] 1) Weigh 0.40g of the original drug of beta-cypermethrin, dissolve it in 12.00g of dichloromethane, stir until the original drug is completely dissolved, then add 0.60g of ethyl cellulose into the solution, stir until the ethyl cellulose is completely dissolved, and prepare Clear solution A containing beta-cypermethrin and ethylcellulose;

[0032] 2) Weigh 26.20g of deionized water into a beaker, add 0.80g of emulsifier Tween-60, and then magnetically stir until the emulsifier is completely dissolved to make a transparent solution B containing emulsifier;

[0033] 3) Mix the transparent solution A obtained in step 1) with the transparent solution B obtained in step 2), and cut at high speed (12000 rpm) for 8 minutes with a high-speed shearing machine to obtain an emulsion;

[0034] 4) removing dichloromethane from the emulsion obtained in step 3) by a rotary evaporator at 40° C. to obtain a suspension containing microspheres;

[0035] 5) The suspension obtained in step...

Embodiment 3

[0037] 1) Weigh 0.20g of the original drug of beta-cypermethrin, dissolve it in 6.00g of dichloromethane, stir until the original drug is completely dissolved, then add 0.30g of ethyl cellulose into the solution, stir until the ethyl cellulose is completely dissolved, and prepare Clear solution A containing beta-cypermethrin and ethylcellulose;

[0038] 2) Weigh 13.10g of deionized water into a beaker, add 0.40g of emulsifier Tween-60, and then magnetically stir until the emulsifier is completely dissolved to make a transparent solution B containing emulsifier;

[0039] 3) Mix the transparent solution A obtained in step 1) with the transparent solution B obtained in step 2), and cut at high speed (10000 rpm) for 10 minutes with a high-speed shearing machine to obtain an emulsion;

[0040] 4) removing dichloromethane from the emulsion obtained in step 3) by a rotary evaporator at 40° C. to obtain a suspension containing microspheres;

[0041] 5) The suspension obtained in step...

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Abstract

The invention discloses a beta-cypermethrin microcapsule and a preparation method thereof. The beta-cypermethrin microcapsule is prepared from the following components: a capsule core, an organic solvent, a wall material, an emulsifier and water, wherein the capsule core is beta-cypermethrin. According to the beta-cypermethrin microcapsule, a macromolecular substance easy to degrade in the environment is adopted as the wall material of the microcapsule, the material is easily obtained, and the environmental compatibility is good; the organic solvent easy to recycle is selected; the novel control-release beta-cypermethrin microcapsule is prepared through forced emulsification by a high shear emulsifying machine. Beta-cypermethrin microcapsules of different grain sizes can be prepared by utilizing a solvent evaporation method; a preparation process is simple in operation; a period is short, and the organic solvent can be recycled. The insecticide microcapsule is excellent in persistent effect, and has the characteristics of light resistance, acid and alkali resistance, slow release and the like, meanwhile, the prevention and control cost is saved, and higher economic value is achieved.

Description

technical field [0001] The invention relates to the technical field of pesticide preparation, in particular to a beta-cypermethrin microcapsule and a preparation method thereof. Background technique [0002] Traditional processing formulations such as emulsifiable concentrates and wettable powders are prone to decompose active ingredients under the influence of light, heat, soil and microorganisms, have a short duration of action, and have poor use effects, and use a large amount of organic solvents, polluting the environment. Pesticide microcapsules can improve the stability of pesticides, slow and control the release of pesticides, prolong the duration of action, reduce the frequency and dosage of pesticides, protect the ecological environment, overcome many shortcomings of traditional dosage forms, and meet the high efficiency, safety and environmental protection of future pesticide dosage forms. direction of development. [0003] At present, the main preparation methods...

Claims

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Application Information

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IPC IPC(8): A01N53/08A01N25/28A01P7/00
CPCA01N53/00A01N25/28A01N2300/00
Inventor 冯建国杨关天钱坤孙陈铖郁倩瑶史雅丽
Owner YANGZHOU UNIV
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