Mesotrione oil dispersion and preparation method thereof

Abstract

The invention relates to a corn field selective postemergence foliar treatment herbicide and a preparation method thereof, and particularly to a mesotrione oil dispersion and a preparation method thereof. The mesotrione oil dispersion comprises the following components by the mass percentage: 10%-30% of mesotrione, 15%-30% of a surfactant, 0.1%-2.1% of a thickener, 1%-5% of a stabilizer, and the balance being a vegetable oil solvent. The corn field herbicide mesotrione is made into an oil-based pesticide dosage form. The raw materials adopt the environment-friendly surfactant monomer and the environment-friendly dispersion medium solvent, processing technology is feasible, and the surfactant selected by the formula has higher cost performance compared with other domestic compound surfactants; especially, the selection of the stabilizer guarantees that the active component is stable over time and the preparation product quality is stable and reliable; and the product has high cost performance, and is an efficient and safe herbicide species.

Description

technical field

[0001] The invention relates to a herbicide for selective post-emergence stem and leaf treatment of corn fields and a preparation method thereof, in particular to a mesotrione dispersible oil suspension and a preparation method thereof. Background technique

[0002] Mesotrione, also known as "Mesotrione", molecular formula C 14 h 13 NO 7 S, relative molecular mass: 339.32, biological activity: herbicide, melting point: 148.7°C~152.5°C, vapor pressure (20°C): <5.7×10 -6 pa, solubility (20°C): 0.16mg / L in water, 1.4g / L xylene, 2.7g / L toluene, 3.6g / L methanol, 76.4g / L acetone, 82.7g / L dichloromethane, 96.1g acetonitrile / L. Stability: Stable in water with pH 5-9, the original drug is stable at 54°C for 14 days.

[0003] Mesotrione is a pre-emergence and post-emergence broad-spectrum selective herbicide that inhibits hydroxyphenylpyruvate dioxygenase (HPPD), which can effectively control broad-leaved grasses and some grass weeds in corn fields . Mesotri...

Examples

Embodiment 1

[0019] First add 10% castor oil polyoxyethylene ether, 5% comb-shaped saturated monomer copolymerized polymer compound, the remaining 71.47% methyl oleate, and 1% fatty alcohol ethoxyglyceride into the reaction kettle, and use Under the action of a high-speed shearing machine at a speed of 1500-12000 rpm, it is mixed into a liquid phase, and then 10.53% (10% converted to 10%) of the original drug of mesotrione with a purity of 95% and 1% organic bentonite , 1% white carbon black and other solid raw materials were added to the reaction kettle and mixed with the liquid phase in the first step together with a high-speed shearing machine for 10 to 20 minutes and mixed into a suspension; then the suspension was sent to the sand Grind into a dispersible oil-suspending agent in a mill. After grinding for 2 hours, the detection fineness reaches 5 to 10 microns, and the material is filtered out, and the quality indicators of the inspection are up to the quality standards of the dispersi...

Embodiment 2

[0021] First add 6% soybean oil polyoxyethylene ether, 3% fatty alcohol polyoxyethylene ether phosphate, 8% polyester polymer mixture, the remaining 65.47% methylated rapeseed oil, and 5% acetic acid into the reaction kettle , with a high-speed shearing machine at a speed of 1500 to 12000 rpm, mix it into a liquid phase, and then mix 10.53% (10% percent) of the original drug of mesotrione with a purity of 95%, 2% Organic bentonite and other solid raw materials are added to the reaction kettle and mixed with the liquid phase in the first step, and are mixed with a high-speed shear for 10 to 20 minutes to form a suspension; then the suspension is sent to a sand mill for grinding into a dispersible oil suspension, after grinding for 2 hours, the detection fineness reaches 5 to 10 microns, and the material is filtered out, and every quality index of the inspection reaches the quality standard of the dispersible oil suspension, that is, the described mesotrione is obtained Dispersi...

Embodiment 3

[0023] First add 5% calcium dodecylbenzenesulfonate, 3% fatty alcohol polyoxyethylene ether phosphate, 10% polyoxyethylene-polyoxypropylene block polyether, the balance 66.47% turpentine, and 3% lactic acid to the In the reaction kettle, use a high-speed shearing machine at a speed of 1500 to 12000 rpm to mix it into a liquid phase, and then add 10.53% (10% to 10%) of the original drug of mesotrione with a purity of 95% , 2% organic bentonite and other solid raw materials were added to the reaction kettle and mixed with the liquid phase in the first step together with a high-speed shearing machine for 10 to 20 minutes and mixed into a suspension; then the suspension was sent to the sand mill Grind into a dispersible oil suspension in the machine. After grinding for 2 hours, the detection fineness reaches 5 to 10 microns, and the material is filtered out. The quality indicators of the inspection are up to the quality standard of the dispersible oil suspension, and the nitrate is...

technical field

[0001] The invention relates to a herbicide for selective post-emergence stem and leaf treatment of corn fields and a preparation method thereof, in particular to a mesotrione dispersible oil suspension and a preparation method thereof. Background technique

[0002] Mesotrione, also known as "Mesotrione", molecular formula C 14 h 13 NO 7 S, relative molecular mass: 339.32, biological activity: herbicide, melting point: 148.7°C~152.5°C, vapor pressure (20°C): <5.7×10 -6 pa, solubility (20°C): 0.16mg / L in water, 1.4g / L xylene, 2.7g / L toluene, 3.6g / L methanol, 76.4g / L acetone, 82.7g / L dichloromethane, 96.1g acetonitrile / L. Stability: Stable in water with pH 5-9, the original drug is stable at 54°C for 14 days.

[0003] Mesotrione is a pre-emergence and post-emergence broad-spectrum selective herbicide that inhibits hydroxyphenylpyruvate dioxygenase (HPPD), which can effectively control broad-leaved grasses and some grass weeds in corn fields . Mesotri...

Examples

Embodiment 1

[0019] First add 10% castor oil polyoxyethylene ether, 5% comb-shaped saturated monomer copolymerized polymer compound, the remaining 71.47% methyl oleate, and 1% fatty alcohol ethoxyglyceride into the reaction kettle, and use Under the action of a high-speed shearing machine at a speed of 1500-12000 rpm, it is mixed into a liquid phase, and then 10.53% (10% converted to 10%) of the original drug of mesotrione with a purity of 95% and 1% organic bentonite , 1% white carbon black and other solid raw materials were added to the reaction kettle and mixed with the liquid phase in the first step together with a high-speed shearing machine for 10 to 20 minutes and mixed into a suspension; then the suspension was sent to the sand Grind into a dispersible oil-suspending agent in a mill. After grinding for 2 hours, the detection fineness reaches 5 to 10 microns, and the material is filtered out, and the quality indicators of the inspection are up to the quality standards of the dispersi...

Embodiment 2

[0021] First add 6% soybean oil polyoxyethylene ether, 3% fatty alcohol polyoxyethylene ether phosphate, 8% polyester polymer mixture, the remaining 65.47% methylated rapeseed oil, and 5% acetic acid into the reaction kettle , with a high-speed shearing machine at a speed of 1500 to 12000 rpm, mix it into a liquid phase, and then mix 10.53% (10% percent) of the original drug of mesotrione with a purity of 95%, 2% Organic bentonite and other solid raw materials are added to the reaction kettle and mixed with the liquid phase in the first step, and are mixed with a high-speed shear for 10 to 20 minutes to form a suspension; then the suspension is sent to a sand mill for grinding into a dispersible oil suspension, after grinding for 2 hours, the detection fineness reaches 5 to 10 microns, and the material is filtered out, and every quality index of the inspection reaches the quality standard of the dispersible oil suspension, that is, the described mesotrione is obtained Dispersi...

Embodiment 3

[0023] First add 5% calcium dodecylbenzenesulfonate, 3% fatty alcohol polyoxyethylene ether phosphate, 10% polyoxyethylene-polyoxypropylene block polyether, the balance 66.47% turpentine, and 3% lactic acid to the In the reaction kettle, use a high-speed shearing machine at a speed of 1500 to 12000 rpm to mix it into a liquid phase, and then add 10.53% (10% to 10%) of the original drug of mesotrione with a purity of 95% , 2% organic bentonite and other solid raw materials were added to the reaction kettle and mixed with the liquid phase in the first step together with a high-speed shearing machine for 10 to 20 minutes and mixed into a suspension; then the suspension was sent to the sand mill Grind into a dispersible oil suspension in the machine. After grinding for 2 hours, the detection fineness reaches 5 to 10 microns, and the material is filtered out. The quality indicators of the inspection are up to the quality standard of the dispersible oil suspension, and the nitrate is...

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