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Pesticide emulsion in water and preparation method thereof

A technology for water emulsion and pesticide, applied in the field of pesticide water emulsion and its preparation, can solve the problems of high production conditions and process requirements, large-scale production restrictions, thermodynamic instability, etc., and achieves high production efficiency, low cost, and easy industrial scale. production effect

Active Publication Date: 2010-08-04
QINGDAO STAR CROPSCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing water-emulsion emulsion has an average droplet size of 0.2-5 μm and a droplet size distribution range of 0.1-10 μm, which belongs to a thermodynamically unstable system, and also has some disadvantages in practical applications, such as being difficult to stabilize (inherent instability) ), prone to delamination; production conditions and process requirements are high, special equipment such as high shear and homogeneity are required, and large-scale production is limited; development is difficult and takes a long time; compared with emulsifiable oil or microemulsion, it is usually Have equivalent or slightly lower efficacy, etc.

Method used

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  • Pesticide emulsion in water and preparation method thereof
  • Pesticide emulsion in water and preparation method thereof
  • Pesticide emulsion in water and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 25 kg of lambda-cyhalothrin, 40 kg of D-limonene, 20 kg of castor oil polyoxyethylene ether, and 15 kg of fatty alcohol polyoxyethylene ether phosphate, mix well to obtain an oil phase; weigh 30 kg of n-octanol 1 kg, 20 kg of magnesium aluminum silicate, 1 kg of methyl polysiloxane, and 849 kg of water, mix well to obtain the water phase; under the stirring condition of 2000 rpm, add the water phase to the oil phase. Under the conditions of a resonance frequency of 20 kHz and a power of 200 W, ultrasonic emulsification was performed for 15 minutes to form 1000 kg of efficient cyhalothrin water emulsion.

[0027] see figure 1 , figure 2 And table 1, table 2, the droplet of the efficient cyhalothrin water emulsion (being Kungfu water emulsion) prepared by ultrasonic emulsification technology and the 2.5% Kungfu water emulsion (EW090611) prepared by general preparation method compare particle size distribution range Narrow, 95% of the droplet size distribution is ...

Embodiment 2

[0040] Weigh 25 kg of bifenthrin, 35 kg of xylene, 15 kg of polyoxyethylene polyoxypropylene block copolymer, 15 kg of fatty alcohol polyoxyethylene ether phosphate, and mix uniformly to obtain an oil phase; weigh 50 kg of isooctanol 1 kg, 20 kg of polyvinyl alcohol, 1 kg of methyl polysiloxane, and 839 kg of water, and mix evenly to obtain the water phase; under the stirring condition of 2000 rpm, add the water phase to the oil phase. Under the conditions of resonance frequency 20kHz and power 800W, ultrasonic emulsification was performed for 8 minutes to form 1000 kg bifenthrin aqueous emulsion, and 95% of the droplet size distribution was 0.07-0.3 μm.

[0041]Use the bifenthrin water emulsion of the present embodiment to prevent and treat tea tree tea green leafhopper, add water to dilute the field spray according to 3 grams / mu of active ingredients, and the control effects of 2 days and 5 days after the medicine are respectively 86.0% and 92.2%, and the application The bif...

Embodiment 3

[0043] Weigh 100 kg of bifenthrin, 100 kg of Solvesso 200, 25 kg of C12-14 alcohol polyoxyethylene ether, and 20 kg of C12-14 polyoxyethylene ether phosphate, mix well to obtain an oil phase; weigh 40 kg of n-butanol 1 kg, 4 kg of xanthan gum, 1 kg of modified methylpolysiloxane, and 710 kg of water, and mix evenly to obtain a water phase; under the stirring condition of 2000 rpm, add the water phase to the oil phase. Under the conditions of resonant frequency 30kHz and power 200W, ultrasonic emulsification was performed for 12 minutes to form 1000 kg bifenthrin aqueous emulsion, and 95% of the droplet size distribution was 0.06-0.35 μm.

[0044] Use the bifenthrin aqueous emulsion of the present embodiment to prevent and treat tea tree tea green leafhopper, add water to dilute the field spray according to 3 grams / mu of active ingredient, the control effect of 2 days and 5 days after the medicine is respectively 83.9% and 90.6%, and application The bifenthrin aqueous emulsion ...

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Abstract

The invention discloses a method for preparing pesticide emulsion in water by ultrasonic emulsification and a pesticide emulsion in water prepared by the method. Compared with the prior art, the pesticide emulsion in water, which is prepared by the method of the invention, has smaller particle size range, thus the pesticide emulsion in water has the advantages of favourable stability, high pesticide effect and the like; meanwhile, compared with the currently universal high-shear and homogenizing emulsification, the emulsion in water, which is prepared by ultrasonic emulsification, has the advantages of simple preparation, high production efficiency, low cost, high emulsification quality and the like.

Description

technical field [0001] The invention relates to a pesticide preparation, in particular to a pesticide emulsion in water and a preparation method thereof. Background technique [0002] As an environment-friendly water-based pesticide preparation, the research and industrialization of pesticide emulsion in water have made remarkable progress in recent years. Since all or most of the organic solvents are replaced by water, the water emulsion has the advantages of environmental friendliness, low toxicity, low residue, low processing cost, high safety during production, storage, transportation and use. However, the existing water-emulsion emulsion has an average droplet size of 0.2-5 μm and a droplet size distribution range of 0.1-10 μm, which belongs to a thermodynamically unstable system, and also has some disadvantages in practical applications, such as being difficult to stabilize (inherent instability) ), prone to delamination; production conditions and process requirements...

Claims

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Application Information

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IPC IPC(8): A01N25/04
Inventor 王文忠孙华英张洪曹明章孔建王新军
Owner QINGDAO STAR CROPSCI
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