Method for preparing biological pesticide spinosad microcapsule preparation
A spinosyn and biological pesticide technology, applied in the field of preparation of biological pesticide spinosyn microcapsule formulations, can solve problems such as unfavorable ecological environment, reduced drug efficacy, increased application amount, etc., and achieves simple process, low equipment investment, controllable The effect of pollution
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[0022] Example 1
[0023] Accurately weigh 24.0g of urea into a three-necked flask, measure 40mL of 37% formaldehyde solution, stir at 1000r / min, stir until all urea is dissolved, add triethanolamine to adjust the pH to 8.0, gradually increase the temperature to 70℃, keep the above stirring The speed and temperature remain unchanged, and the reaction stops after 1 hour to generate a viscous transparent liquid. Then, dilute with distilled water about 2 times the volume of the formaldehyde solution to obtain a stable urea-formaldehyde resin prepolymer aqueous solution.
[0024] Dissolve 1.0g spinosyn in 10mL chloroform completely at room temperature, then add 15mL petroleum ether, stir and mix well, add 70mL sodium lauryl sulfate aqueous solution with 0.7% mass percentage as emulsifier, Stir at 1000r / min for 10min to fully disperse and emulsify the capsule core. Then, add 75mL of the above urea-formaldehyde resin prepolymer solution, 1000~2000r / min, continue to stir for 15min, reduc...
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[0026] Example 2
[0027] Accurately weigh 40.0g of urea into a three-necked flask, measure 100mL of 37% formaldehyde solution, stir at 1000r / min, stir until all the urea is dissolved, add triethanolamine to adjust the pH to 8.0, gradually increase the temperature to 70℃, keep the above stirring The speed and temperature remain unchanged, and the reaction stops after 1 hour to generate a viscous transparent liquid. Then, dilute with distilled water about 2 times the volume of the formaldehyde solution to obtain a stable urea-formaldehyde resin prepolymer aqueous solution.
[0028] Completely dissolve 1.5g spinosyn in 25mL chloroform at room temperature, then add 35mL petroleum ether, stir and mix well, add 120mL styrene-maleic anhydride copolymer with 0.7% mass percentage as emulsifier , Stir at 1000r / min for 10min to fully disperse and emulsify the capsule core. Then, add 240mL of the above-mentioned urea-formaldehyde resin prepolymer solution, 1000~2000r / min, continue to stir fo...
Example Embodiment
[0030] Example 3
[0031] Accurately weigh 36.0g of urea into a three-necked flask, measure 60mL of 37% formaldehyde solution, stir at 1000r / min, stir until all urea is dissolved, add NaOH solution to adjust the pH to 8.5, gradually increase the temperature to 80℃, keep the above stirring The speed and temperature remain unchanged, and the reaction stops after 1 hour to generate a viscous transparent liquid. Then, dilute with distilled water about 2 times the volume of the formaldehyde solution to obtain a stable urea-formaldehyde resin prepolymer aqueous solution.
[0032] Dissolve 1.0g spinosyn in 30mL petroleum ether at room temperature, stir and mix well, add 120mL sodium dodecylbenzene sulfonate aqueous solution with a mass percentage of 0.1% as emulsifier, stir at 1000r / min for 10min, Fully disperse and emulsify the capsule core. Then, add 150mL of the above urea-formaldehyde resin prepolymer solution, 1000~2000r / min, continue to stir for 15min, reduce the speed to 700r / min,...
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