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Chlorpyrifos microcapsule suspension and preparation method thereof

A technology of microcapsule suspension and methapon, which is applied in the direction of botany equipment and methods, insecticides, biocides, etc., can solve the problems of polluting the environment, adverse health effects of users, waste of industrial resources, etc., and achieve skin irritation Reduction of sexual substances, reduction of application times, and reduction of toxicity levels

Inactive Publication Date: 2011-05-18
联合国南通农药剂型开发中心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of traditional dosage forms such as emulsifiable concentrates has certain shortcomings, such as: emulsifiable concentrate preparations use a large amount of organic solvents such as toluene, xylene, etc., which not only wastes industrial resources, but also seriously pollutes the environment and has adverse effects on the health of users

Method used

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  • Chlorpyrifos microcapsule suspension and preparation method thereof
  • Chlorpyrifos microcapsule suspension and preparation method thereof
  • Chlorpyrifos microcapsule suspension and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065]

[0066]

[0067] The former medicine (97%) of 20g of trimephos is dissolved in 15g of xylene (commercially available material), then add 4g of toluene diisocyanate TDI (such as the product of Cangzhou Dahua TDI Co., Ltd.) and stir (oil phase) ; Add 2.0g of emulsifier fatty alcohol polyoxyethylene ether AEO-9 (such as the product of Nanjing Taihua Co., Ltd.), 10g of 10% polyvinyl alcohol PVA aqueous solution into 27.9g of deionized water and stir (water phase); Put the prepared oil phase into the water phase and turn on the high-speed homogenization to form a stable O / W emulsion. The average particle size of the emulsion is measured to be 2.65 μm; turn on the stirring (maintain 600 rpm), and then put the homogenized emulsion Be warming up to 75 ℃, slowly add the hexamethylenediamine of 0.4g simultaneously, maintain the solidification temperature of capsule wall material for 3 hours, add the xanthan gum (2 %) aqueous solution, 0.1g of glacial acetic acid to adjust ...

Embodiment 2

[0069]

[0070]

[0071] The former medicine of 32g of trimethaphos is dissolved in 15g of C9 aromatics solvent naphtha (such as the product of Jinling Petrochemical Co., Ltd.), then add 3g of polyphenyl polymethylene polyisocyanate PAPI (such as the product of Bayer, Germany) Stir with 2g of diphenylmethane diisocyanate MDI (such as the product of Yantai Wanhua Polyurethane Co., Ltd.) to be an oil phase; Gum Arabic (5%) aqueous solution was added to 19g of deionized water and stirred to form a water phase; put the configured oil phase into the water phase and turn on high-speed homogenization to form a stable O / W emulsion, and measure the average particle size of the emulsion 10.58 μm; start stirring (maintain 700 rpm), then raise the temperature of the homogenized emulsion to 50°C, and slowly add 0.4g of triethanolamine to maintain a stable solidification temperature of the capsule wall material for 8 hours, then add 3g of phosphoric acid Ester dispersant NP-P (such as...

Embodiment 3

[0073]

[0074]

[0075] The former medicine (97%) of 40g of trimephos is thermally dissolved in the xylene of 8g, then adds the polyphenyl polymethylene polyisocyanate PAPI of 5g (for example the product of German Bayer company) and the toluene diisocyanate of 0.9g TDI (such as the product of Cangzhou Dahua TDI Co., Ltd.) is stirred evenly to be an oil phase; 2.0 g of emulsifier NP-10 (such as the product of Nanjing Taihua Co., Ltd.), 5 g of xanthan gum (2%) aqueous solution are added Stir 32g of deionized water into the water phase; put the prepared oil phase into the water phase and turn on high-speed homogenization to form a stable O / W emulsion. The average particle size of the emulsion is measured to be 45.2 μm; turn on the stirring (maintain 800 rpm / min), then the homogenized emulsion was warmed up to 35°C, and at the same time, 0.6g of diethylenetriamine was slowly added to maintain a stable solidification temperature of the capsule wall material for 22 hours, and...

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Abstract

The invention discloses a chlorpyrifos microcapsule suspension. The chlorpyrifos microcapsule suspension mainly comprises the following components in percentage by weight: 10 to 45 percent of chlorpyrifos, 5 to 20 percent of solvent, 1 to 10 percent of capsule wall material, 0.1 to 3 percent of lacquer, 2 to 5 percent of emulsifier, 3 to 5 percent of dispersant, 0 to 14 percent of auxiliary agentand 10 to 80 percent of water. The invention also discloses a preparation method of the chlorpyrifos microcapsule suspension. The chlorpyrifos microcapsule suspension has the advantages of reducing acute toxicity of raw medicaments, reducing environmental pollution and stimulation to people and livestock, improving prevention and control effect on insect damages such as a citrus tree scale insectand the like, greatly prolonging duration of a pesticide and reducing pesticide application frequency and agricultural cost. Since microcapsule technology is adopted and water is used as a dispersingmedium in the chlorpyrifos microcapsule suspension, the chlorpyrifos microcapsule suspension is difficult to flame and explode, and can be safely and reliably used and transported.

Description

technical field [0001] The invention belongs to the field of pesticide dosage form processing, and in particular relates to a microcapsule made of organophosphorus methapone pesticide as a capsule core, polyurea resin as a capsule shell material, and water-based dispersion medium. Phosphorus microcapsule suspension and its preparation method. Background technique [0002] Chlorpyrifos chemical name: S-2,3-dihydro-5-methoxy-2-oxo-1,3,4-thiadiazol-3-ylmethyl O, O-dimethyl Phosphorodithioate. Physical and chemical properties: colorless crystal, melting point 39-40°C, vapor pressure 2.5×10^(-4)Pa (20°C), density 1.51 (20°C), KowlogP=2.2, solubility in water 200mg / L (25°C), Ethanol 150, acetone 670, toluene 720, hexane 11, n-octanol 14 (g / L, 20°C), hydrolyzed in strong acid and alkali, stable in neutral and slightly acidic environment. [0003] Methapion is a highly toxic insecticide, which is a broad-spectrum organophosphorus insecticide. It has contact killing, stomach poiso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/04A01N25/28A01N57/16A01P7/04
Inventor 曹雄飞仲苏林曹新梅吴建兰章东生
Owner 联合国南通农药剂型开发中心
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