Water dispersible granule containing pyraclostrobin and preparation method thereof

A technology of pyraclostrobin and dispersible granules, applied in the directions of botanical equipment and methods, fungicides, biocides, etc., can solve the problems of unsatisfactory drug effect, adhesion or paste, low suspension rate, etc. The frequency of application, the prolongation of the action period, the effect of improving the dispersibility

Inactive Publication Date: 2019-01-18
SHENZHEN NOPOSION AGROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To overcome the phenomenon that the materials containing pyraclostrobin in the prior art are easy to melt, stick or paste in the process of jet milling or sand milling, and the phenomenon of pyraclostrobin containing pyraclostrobin caused by melting, sticking or creaming of the material Technical problems of poor dispersibility, low suspension rate and unsatisfactory drug efficacy of ester water-dispersible granules

Method used

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  • Water dispersible granule containing pyraclostrobin and preparation method thereof
  • Water dispersible granule containing pyraclostrobin and preparation method thereof
  • Water dispersible granule containing pyraclostrobin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Preparation of 5% pyraclostrobin water-dispersible granules

[0022] Step 1 Preparation of 20% pyraclostrobin microcapsules aqueous suspension

[0023] Heat 41.0g of pyraclostrobin technical material (98%) to 70°C±5°C and stir to melt, then add 0.8g of MR-200 (polymethylene polyphenylisocyanate) and mix evenly to prepare an oil phase, and 12.0 g Ultrazine NA (lignosulfonate) and 2.0g BY-125 (castor oil polyoxyethylene ether) were dissolved in 130g water and stirred to dissolve to prepare a water phase, and the oil phase was added to the water phase and sheared to prepare an average particle size 0.5μm~2.0μm O / W emulsion, then slowly add 2.0g of 10% diethylenetriamine aqueous solution to the emulsion under stirring, keep it at 70℃±5℃ for 1.0h, cool down to room temperature, adjust pH with appropriate amount of citric acid value of 5.0-7.0, make up 200.0 g with water to prepare 20% aqueous suspension of pyraclostrobin microcapsules, wherein the solid content is...

Embodiment 2

[0028] Example 2 Preparation of 20% pyraclostrobin water-dispersible granules

[0029] Step 1 Preparation of 30% pyraclostrobin microcapsules aqueous suspension

[0030] Heat 61.3g of pyraclostrobin technical material (98%) to 70°C±5°C and stir to melt, then add 3.0g of MondurMRS (polymethylene polyphenylisocyanate) and mix evenly to prepare an oil phase, and 10.0g of Borresperse NA (lignosulfonate) and 1.0g Tween-80 (polyoxyethylene sorbitan monooleate) were dissolved in 110g water and stirred to dissolve to prepare a water phase, and the oil phase was added to the water phase and sheared to prepare a O / W emulsion with an average particle size of 0.5μm-2.0μm, then slowly add 7.7g of 20% triethylenetetramine aqueous solution to the emulsion under stirring, keep it at 70°C±5°C for 1.0h, cool down to room temperature and add an appropriate amount of lemon The pH value was adjusted to 5.0-7.0 with acid, and 200.0 g of water was supplemented to prepare a 30% aqueous suspension of...

Embodiment 3

[0035] Example 3 Preparation of 50% pyraclostrobin water-dispersible granules

[0036] Step 1 Preparation of 50% pyraclostrobin microcapsules aqueous suspension

[0037] Heat 102.0g pyraclostrobin technical material (98%) to 70°C±5°C and stir to melt, then add 1.5g PM-200 (polymethylene polyphenyl isocyanate) and mix evenly to prepare an oil phase. Dissolve g 2700 (polycarboxylate) and 5.0g EL-80 (castor oil polyoxyethylene ether) in 100g water and stir to dissolve to prepare a water phase, add the oil phase to the water phase and shear to prepare an average particle size of 0.5 μm ~2.0μm O / W emulsion, then slowly add 1.3g of 50% hexamethylenediamine aqueous solution to the emulsion under stirring, keep it at 70℃±5℃ for 1.0h, cool down to room temperature, adjust the pH value to 5.0~ with an appropriate amount of citric acid 7.0, make up 200.0 g with water to prepare a 50% aqueous suspension of pyraclostrobin microcapsules, wherein the solid content is about 57.4%.

[0038] ...

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Abstract

The invention provides a water dispersible granule containing pyraclostrobin and a preparation method thereof. The water dispersible granule containing pyraclostrobin is prepared according to the following steps: heating and fusing pyraclostrobin and then adopting an interfacial polymerization method for preparing a microcapsule preparation with average grain diameter of 0.5um-2.0um; uniformly mixing the microcapsule preparation with water-based grinding paste of auxiliaries with average grain diameter of 0.5um-2.0um or water-based grinding paste containing tebuconazole or cymoxanil; performing spray drying, thereby acquiring the water dispersible granule. According to the invention, pyraclostrobin is prepared into a nearly spherical aqueous suspension of microcapsule pesticide, so that the technical problem of easiness in melting, adhering or livering of pyraclostrobin during a fluid energy milling or sanding process can be avoided, and the dispersity, suspensibility, storage stability, and the like, of the water dispersible granule containing pyraclostrobin are promoted. The water dispersible granule containing pyraclostrobin provided by the invention has a certain slow release effect and is capable of persistently and effectively controlling various plant diseases.

Description

technical field [0001] The invention belongs to the field of pesticide preparations, and in particular relates to a water-dispersible granule containing pyraclostrobin and a preparation method thereof. Background technique [0002] Pyraclostrobin belongs to the methoxyacrylate fungicides and is a mitochondrial respiration inhibitor. It prevents electron transfer and destroys energy transfer in cytochrome synthesis, and has protection, treatment, and leaf osmotic conduction. Pyraclostrobin is a broad-spectrum fungicide, especially suitable for crops with mixed diseases. Registered for the control of at least 49 diseases on more than 100 crops, involving major pathogenic bacteria of all 4 major subphyla in the fungal taxonomy. At the same time, pyraclostrobin has significant anti-stress and health effects, and has broad application prospects. [0003] There are four different crystal forms of pyraclostrobin. The melting points of the four crystal forms are different, but the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N47/24A01N25/04A01N25/14A01P3/00
CPCA01N25/04A01N25/14A01N47/24
Inventor 李广泽丁秀丽景辉
Owner SHENZHEN NOPOSION AGROCHEM
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