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
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Embodiment 1
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[0067]
[0068] Dissolve 20g of trimethafos (97%) 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 evenly (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 Warming up to 75°C, while slowly adding 0.4g of hexamethylenediamine to maintain a stable wall material solidification temperature for 3 hours, then adding 5.0g of dispersant sodium lignosulfonate, 5.0g of ethylene glycol, and 10g of xanthan gum (2 %) aqueous so...
Embodiment 2
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[0072] Dissolve 32g of trimethafos in 15g of C9 aromatic solvent oil (such as the product of Jinling Petrochemical Co., Ltd.), and 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 form an oil phase; mix 2g of emulsifier Tween-60 (such as the product of Jiangsu Haian Petrochemical Co., Ltd.), 10g Aqueous solution of gum arabic (5%) was added into 19g of deionized water and stirred evenly to form 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, 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 at the same time to maintain a stable solidification temperature of t...
Embodiment 3
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[0076] 40g of trimethafos (97%) is hot-dissolved in 8g of xylene, and then 5g of polyphenyl polymethylene polyisocyanate PAPI (such as the product of Bayer, Germany) and 0.9g of toluene diisocyanate are added. TDI (such as the product of Cangzhou Dahua TDI Co., Ltd.) is stirred evenly to form an oil phase; 2.0g of emulsifier NP-10 (such as the product of Nanjing Taihua Co., Ltd.), 5g of xanthan gum (2%) aqueous solution is 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 at 800 rpm / min), then the temperature of the homogenized emulsion was raised 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 then 3.0g of carboxy...
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