Capsule type compound pesticide formulation and preparation method and application thereof

A technology of pesticides and microcapsules, applied in the field of pesticides, can solve the problems of decreased suspension rate of wettable powders, poor dispersion of preparations, and reduced drug efficacy, and achieve the effects of easy industrial production, low cost, and simple operation

Inactive Publication Date: 2017-04-19
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the emulsifier breaks, the dispersibility of the preparation becomes poor, the suspension rate of the wettable powder decreases, or flocculation or even precipitation occurs, hydrolysis and other adverse physical or chemical changes occur, resulting in increased toxicity after mixing, reduced drug efficacy or If there is phytotoxicity, it should not be processed into compound preparations

Method used

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  • Capsule type compound pesticide formulation and preparation method and application thereof
  • Capsule type compound pesticide formulation and preparation method and application thereof
  • Capsule type compound pesticide formulation and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment 1, preparation Abamectin · chlorantraniliprole composite microcapsules

[0060] 1) Ultrasonic dispersion of the pesticide A chlorantraniliprole in secondary water to obtain a 5% suspension by weight of the drug as the internal water phase.

[0061] Dissolve the pesticide B avermectin and the synthetic degradable polymer material industrial polylactic acid with a molecular weight of 5,000 to 500,000 in dichloromethane, and prepare the concentration of abamectin and industrial polylactic acid to be 100mg / mL and 100mg / mL respectively mixed solution as the oil phase.

[0062] After the oil phase and the inner water phase were mixed according to the volume ratio of 5:1, the water-in-oil primary emulsion was obtained by ultrasonicating for 2 minutes under the ultrasonic power of 400W.

[0063] 2) Dissolving polyvinyl alcohol in water to prepare a 1.0% polyvinyl alcohol aqueous solution as the external water phase.

[0064] The water-in-oil primary emulsion obtain...

Embodiment 2

[0068] Embodiment 2, preparation Abamectin · chlorantraniliprole composite microcapsules

[0069] 1) Ultrasonic dispersion of the pesticide A chlorantraniliprole in secondary water to obtain a 10% drug by weight suspension as the internal water phase.

[0070] Dissolve the pesticide B abamectin and the synthetic degradable polymer material industrial polylactic acid with a molecular weight of 5,000 to 500,000 in dichloromethane, and prepare the concentration of abamectin and industrial polylactic acid to be 50mg / mL and 100mg / mL respectively mixed solution as the oil phase.

[0071] The oil phase obtained in the step (2) is mixed with the internal water phase obtained in the step (1) according to a volume ratio of 2:1, and then ultrasonicated for 1 min at an ultrasonic power of 200 W to obtain a water-in-oil primary emulsion.

[0072] 2) Dissolving polyvinyl alcohol in water to prepare a 1.0% polyvinyl alcohol aqueous solution as the external water phase.

[0073] The water-i...

Embodiment 3

[0077] Example 3, Preparation of Abamectin Chlorantraniliprole Composite Microcapsules

[0078] 1) Ultrasonic dispersion of the pesticide A chlorantraniliprole in secondary water to obtain a 10% drug by weight suspension as the internal water phase.

[0079] Dissolve the pesticide B avermectin and the synthetic degradable polymer material industrial polylactic acid with a molecular weight of 5,000 to 500,000 in dichloromethane, and prepare the concentration of abamectin and industrial polylactic acid to be 40mg / mL and 100mg / mL respectively mixed solution as the oil phase.

[0080] The oil phase obtained in the step (2) is mixed with the internal water phase obtained in the step (1) according to a volume ratio of 2:1, and then ultrasonicated for 1 min at an ultrasonic power of 200 W to prepare a water-in-oil primary emulsion.

[0081] 2) Dissolving polyvinyl alcohol in water to prepare a 1.0% polyvinyl alcohol aqueous solution as the external water phase.

[0082] The water-i...

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Abstract

The invention discloses a capsule type compound pesticide formulation and a preparation method and application of the capsule type compound pesticide formulation. The compound pesticide microcapsule is composed of a shell, a pesticide A wrapped inside the shell and a pesticide B loaded in the shell. The shell is formed by a biodegradable high-molecular material. The pesticide A and the pesticide B do not have negative cross resistance or at least do not have cross resistance. According to the capsule type compound pesticide formulation, the manner that the kernel and the shell load pesticide is adopted to achieve compounding of the pesticides, and the ratio between the two compounded pesticides can be adjusted by adjustment of process parameters.

Description

technical field [0001] The invention belongs to the field of pesticides, and relates to a capsule-type compound pesticide preparation and a preparation method and application thereof. Background technique [0002] At present, the long-term, large-scale, single use and abuse of existing pesticides have led to the development of resistance of harmful organisms, the sharp decline in the number of natural enemies, the aggravation of the destruction of the ecological balance of farmland, and the rampant occurrence of many harmful organisms. However, the development of new varieties of pesticides requires large investment, high risk and long cycle. The development of compound preparations by compounding different existing pesticide varieties not only has the practical significance of solving the shortage of pesticide varieties and insufficient supply, but also provides high-efficiency pesticides for agriculture, prolongs the service life of existing pesticides, and improves the ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/28A01N43/90A01N43/56A01N57/14A01N57/30A01N53/08A01P7/04
CPCA01N25/28A01N43/56A01N43/90A01N53/00A01N57/14A01N57/30A01N2300/00
Inventor 吴德成刘宝霞
Owner INST OF CHEM CHINESE ACAD OF SCI
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