Preparation method of suspending agent containing pyraclostrobin and copper abietate

Abstract

The invention discloses a preparation method of a suspending agent containing pyraclostrobin and copper abietate, belonging to the technical field of agricultural sterilizing agents. The preparation method comprises the steps of synthesizing copper abietate in a water phase in one step, adding a pyraclostrobin crude drug during the synthesis, and preparing the suspending agent containing pyraclostrobin and copper abietate by virtue of a sand milling process. Being different suspending agent compounding processes in the prior art, the preparation method has the advantages that copper abietate can be synthesized in one step, and the suspending agent containing pyraclostrobin and copper abietate can be produced. The mass percentage of pyraclostrobin to copper abietate contained in the suspending agent is (1 to 20)-(2 to 1), the mass percentage of effective components (namely pyraclostrobin and copper abietate) in the composition is 5%-40%, and the rest components are aid components and water required in the preparation process of the suspending agent. The compounded suspending agent is mainly used for preventing and treating multiple fungal and bacterial diseases of crops and simultaneously has an obvious stimulation effect to the growth of the crops.

Description

technical field [0001] The invention relates to a preparation method of a copper rosinate compound suspending agent, in particular to a preparation method of pyraclostrobin and copper rosinate suspending agent, and belongs to the technical field of agricultural fungicides. Background technique [0002] Pyraclostrobin is a methoxyacrylate fungicide with a pyrazole structure developed by BASF in 1993. It inhibits mitochondrial respiration by preventing the transfer of electrons between microchrome b and C1, so that mitochondria cannot Generate and supply the energy (ATP) needed by cells for normal metabolism, eventually leading to cell death. [0003] Its structural formula is: [0004] [0005] Physical and chemical properties: pyraclostrobin is white to light beige odorless crystals, melting point: 63.7-65.2°C, density: 1.37, vapor pressure: 2.6×10 -8 Pa (20-25°C). [0006] Pyraclostrobin has a broad bactericidal spectrum, and can control most fungal diseases of crops ...

AI Technical Summary

Problems solved by technology

However, the preparation methods disclosed in the examples all adopt the traditional preparation process of pesticide formulations, that is, purchase copper rosinate and pyraclostrobin, and then mix dispersant, wetting agent, thickener, antifreeze, etc. Auxiliaries, and then through the sand milling process for the preparation of related formulations, and the emulsifiable concentrates, microemulsions, and water-emulsions disclosed by them all use a large amount of organic solvents, which not only pollute the environment during production and use, but also cause Causes an increase in its production cost, and at the same time increases its risk of phytotoxicity to crops during use

[0013] In the actual development process, the inventors found that: pyraclostrobin contains a variety of crystal structures, of which only one crystal structure (relatively high melting point) is suitable for the preparation of suspensions. The structure and content of the original drug of the ester have high requirements. If the selected original drug is not suitable, the phenomenon of creaming will easily occur during the sanding process, and the prepared suspension concentrate samples often have quality problems such as oil separation during thermal storage, which affects the use of the product. Effect and sales

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