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High-content chlorpyrifos microcapsule suspension agent and production method

A technology of microcapsule suspending agent and chlorpyrifos, which is applied in the fields of botanical equipment and methods, biocides, animal repellents, etc., can solve the problems of adverse health effects of users, waste of industrial resources, pollution of the environment, etc., and the process is easy to control. , the effect of reducing toxicity and reducing acute toxicity

Inactive Publication Date: 2009-05-13
联合国南通农药剂型开发中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of these dosage forms has certain shortcomings, such as: emulsifiable concentrate preparations use a large amount of organic solvents such as

Method used

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  • High-content chlorpyrifos microcapsule suspension agent and production method
  • High-content chlorpyrifos microcapsule suspension agent and production method
  • High-content chlorpyrifos microcapsule suspension agent and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The former medicine of chlorpyrifos (97% content) of 20g is dissolved in the Solvesso 150 aromatic hydrocarbon solvent naphtha (U.S. Exxon Mobil company product) of 15g, then add the toluene diisocyanate TDI (Cangzhou Dahua TDI limited liability company) of 4g and stir evenly ( Oil phase); 2.0g of emulsifier AEO-7 (Nanjing Taihua Chemical Co., Ltd.), 10g of 10% PVA (polyvinyl alcohol) aqueous solution was added to deionized water and stirred (water phase); the configured oil phase Enter the water phase and start high-speed homogenization to form a stable O / W emulsion; start stirring (maintain 600 rpm), then heat the homogenized emulsion to 40°C, and slowly add 0.4g of hexamethylenediamine to maintain Stable capsule wall material curing temperature 8 hours, add dispersant sodium lignosulfonate 3.0g, 8.0g ethylene glycol, 10g xanthan gum (wherein xanthan gum content is 2%) aqueous solution, 0.1g ice Acetic acid was used to adjust the pH value to about 7, 0.1 g of isothiaz...

Embodiment 2

[0044] The chlorpyrifos former medicine (97%) of 31g is dissolved in the C9 aromatic hydrocarbon solvent naphtha (Jinling Petrochemical Co., Ltd.) of 10g, then adds the polyphenyl polymethylene polyisocyanate PAPI (Germany Bayer company) of 3g and 2.0g Diphenylmethane diisocyanate MDI (Yantai Wanhua Polyurethane Co., Ltd.) is stirred evenly to be an oil phase; 2.0 g of emulsifier Tween-60 (Jiangsu Haian Petrochemical Co., Ltd.), 10 g of gum arabic (wherein the content of gum arabic 5%) aqueous solution into deionized water and stir to form a water phase; put the prepared oil phase into the water phase and turn on high-speed homogenization to form a stable O / W emulsion; turn on stirring (maintain 700 rpm), and then put The homogenized emulsion is warmed up to 70°C, and at the same time, 0.4g of triethanolamine is slowly added to maintain a stable solidification temperature of the capsule wall material for 3 hours, and then 3.0g of phosphate ester dispersant NP-P (Nanjing Taihua ...

Embodiment 3

[0048]The former medicine (97%) of chlorpyrifos of 41.3g is thermally dissolved in the xylene of 8g, then adds the polyphenyl polymethylene polyisocyanate PAPI (Bayer Company of Germany) of 4g and the toluene diisocyanate TDI (Cangzhou University) of 0.9g (Nanjing Taihua Co., Ltd.) and stir evenly to be an oil phase; add 2.0 g of emulsifier NP-10 (Nanjing Taihua Co., Ltd.), 5 g of xanthan gum (1% content) aqueous solution into deionized water and stir to be a 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; turn on the stirring (maintain 800 rpm), then raise the temperature of the homogenized emulsion to 50°C, and slowly add 0.6g Diethylenetriamine, maintain stable wall material solidification temperature for 7 hours, then add 3.0g carboxylate dispersant TERSPERSE 2700 (Huntsman company), 3.0g glycerol, 2.5g xanthan gum (2 % content) aqueous solution, 0.15g of glacial acetic acid to adjust the...

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Abstract

The invention discloses a high content chlorpyrifos microcapsule suspension agent and preparation method, comprising chlorpyrifos, solvent, capsule wall material, protection gum, emulsification dispersant, anti-freezing agent, viscosity regulator, pH regulator, sterilization preservative, anti-foaming agent and water. The high content chlorpyrifos microcapsule suspension agent has small environmental pollution and long persistent period.

Description

Technical field: [0001] The invention relates to a pesticide dosage form. Background technique: [0002] Chlorpyrifos (chlorpyrifos) chemical name: 0,0-diethyl-00 (3,5,6,-trichloro-2-pyridyl) phosphorothioate. It belongs to broad-spectrum insecticide of phosphorothioate class, and has contact killing, stomach poisoning and fumigation effects. Chlorpyrifos can be widely used to control various pests and mites such as stem borers, leaf rollers, armyworms, scale insects, aphids, bollworms, etc. on rice, cotton, fruit trees, tea, wheat, sugarcane and other crops, with relatively low toxicity , has contact killing, stomach poisoning and fumigation effects on pests, and also treats mites. In recent years, the country has accelerated the pace of eliminating highly toxic pesticides, and chlorpyrifos has become one of the alternatives to highly toxic organophosphorus pesticides. At present, it is mainly processed into emulsifiable concentrate for use in China. In recent years, som...

Claims

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Application Information

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IPC IPC(8): A01N57/16A01N25/28
Inventor 仲苏林曹雄飞曹新梅章东生吴建兰
Owner 联合国南通农药剂型开发中心
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