Avermectin microcapsule suspending agent and preparation method thereof

A technology of microcapsule suspension and avermectin, which is applied in the direction of botany equipment and methods, insecticides, acaricides, etc., can solve environmental pollution and other problems, achieve environmental friendliness, reduce the number of spraying, reduce The effect of usage

Inactive Publication Date: 2011-06-29
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

[0005] The present invention provides a kind of abamectin microcapsule suspension and its preparation method in order to solve the problem that the existing abamectin preparations use a large amount of organic solvents and emulsifiers to pollute the environment

Method used

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  • Avermectin microcapsule suspending agent and preparation method thereof
  • Avermectin microcapsule suspending agent and preparation method thereof
  • Avermectin microcapsule suspending agent and preparation method thereof

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preparation example Construction

[0065] The preparation method of Abamectin microcapsule suspension of the present invention is to provide the material according to the above-mentioned components, under normal pressure, prepares Abamectin microcapsules by the following specific process route:

[0066] Put Abamectin original drug and wetting and dispersing agent into an appropriate amount of solvent, and then grind it through a sand mill until the average particle size of the material is 1um to 20um, and then add an appropriate amount of isocyanate capsules to the sanded material The wall material monomer is stirred evenly to obtain the oil phase;

[0067] Add emulsifier and protective glue to the water in advance and stir evenly, then add the pre-configured oil phase, homogenize at high speed to form a stable oil-in-water emulsion;

[0068] Reduce the rotational speed, and under a suitable rotational speed condition, add polyamine or polyol aqueous solution to participate in the interfacial polymerization rea...

Embodiment 1

[0072]

[0073] The former medicine of Abamectin Zhebai of 1g is dissolved in the dimethylbenzene (commercially available material) of 15g, then add the toluene diisocyanate TDI (Cangzhou Dahua TDI limited liability company) of 2g, stabilizer BHA 0.2g and stir (oil phase); 2.0g of emulsifier nonylphenol polyoxyethylene ether NP-12 (Haian Petrochemical Co., Ltd.), 10g of 10% polyvinyl alcohol PVA aqueous solution was added to 49g of deionized water and stirred (water phase); The configured oil phase is transferred to the water phase and high-speed homogenization is started to form a stable O / W emulsion with an average particle size of 2.53um; the stirring is started (maintaining 600 rpm), and then the homogenized emulsion is heated to At 40°C, slowly add 0.1g of hexamethylenediamine to maintain a stable wall material curing temperature for 8 hours, then add 5.0g of sodium lignosulfonate, 5.0g of ethylene glycol, and 10g of xanthan gum (2%) as a dispersant Aqueous solution, 0...

Embodiment 2

[0075]

[0076] Disperse the original drug of Abamectin Zhebai of 5g in soybean oil of 20g, and add 5g of stabilizer epoxy soybean oil and stir evenly (oil phase) and then pass through the sand mill until the average particle size of the material reaches about 5um, Stop sanding; then add 3.0g of polyphenyl polymethylene polyisocyanate PAPI (Bayer, Germany) and 1.0g of diphenylmethane diisocyanate MDI (Yantai Wanhua Polyurethane Co., Ltd.) and stir evenly to be an oil phase; Add 2.0g of emulsifier Tween-60 (Jiangsu Haian Petrochemical Co., Ltd.), 10.0g of gum arabic (5%) aqueous solution into 31g of deionized water and stir to form a water phase; put the configured oil phase into the water phase And turn on the high-speed homogenization to form a stable O / W emulsion. When the average particle size of the emulsion is about 10um; turn on the stirring (maintain 700 rpm), and then raise the temperature of the homogenized emulsion to 35°C, and slowly add 1.0 The triethanolamine o...

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Abstract

The invention discloses an avermectin microcapsule suspending agent and a preparation method thereof. The avermectin microcapsule suspending agent mainly comprises the following components in percentage by weight: 1 to 10 percent of avermectin, 5 to 40 percent of solvent, 1 to 8 percent of capsule wall material, 0.1 to 3 percent of protection glue, 2 to 5 percent of emulsifier, 3 to 5 percent of dispersant, 0 to 14 percent of adjuvant, and the balance of water. The preparation method for the avermectin microcapsule suspending agent comprises the following steps of: preparing avermectin microcapsules from an avermectin active substance serving as capsule cores and a carbamide resin serving as the capsule wall material by using an interfacial polymerization technology, and finally blending to obtain a microcapsule water suspending agent. Active ingredients of the avermectin microcapsule suspending agent are centralized in the capsule cores, and other media are almost water, so the environmental pollution is reduced and the production cost of products is also effectively reduced. The avermectin microcapsule suspending agent has the release control capacity and can prolong effective duration of pesticides by 3 to 10 times, so that the acute toxicity of technical materials is reduced and the toxicity of a preparation on non-target organisms is also reduced. The avermectin microcapsule suspending agent is safe to use and transport.

Description

technical field [0001] The invention belongs to the field of pesticide formulation processing, and specifically relates to a new pesticide formulation of avermectin, which is made of biopesticide abamectin as a capsule core and polyurea resin as a capsule shell material, and is made of a water-based dispersion medium. Bacterin microcapsule suspension and preparation method thereof. Background technique [0002] Avermectins: a class of 16-membered macrolide compounds with insecticidal, acaricidal and nematicidal activities, produced by fermentation of Streptomyces griseus in Streptomyces. Physical and chemical properties of the original drug: density 1.16; the fine powder of the original drug is white or yellow crystal (containing B1a≥90%), vapor pressure <200nPa, melting point 150-155°C. The solubility at 21°C is 7.8mg / L in water, 100g / L in acetone, 350g / L in toluene, 70g / L in isopropanol, and 25g / L in chloroform. It is not easy to decompose. There is no decomposition p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/04A01N25/22A01N43/90A01P7/04A01P7/02A01P5/00
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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