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Avermectin water dispersible granule and its preparation method

A technology of abamectin and dispersibility, which is applied in the field of abamectin water-dispersible granules and its preparation, can solve the problems of lax operation, improper management, environmental pollution, etc., achieve good effect, increase utilization rate, Effects on addressing dermal toxicity

Active Publication Date: 2014-05-28
SHANGHAI NONGLE BIOLOGICAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For a long time, most of the liquid pesticide technical materials and the solid technical medicines with considerable solubility in organic solvents, whether they are insecticides, acaricides, fungicides or herbicides, etc., are mostly in the form of emulsifiable concentrates. Pesticide emulsifiable concentrate has always been an important dosage form of pesticide preparations. However, since the emulsifiable concentrate contains a large amount of flammable organic solvents, it has strict requirements on production, storage, transportation, and use. Phytotoxicity
Especially in the long-term use process, a large amount of organic solvents volatilize into the atmosphere, causing serious pollution to the environment, all these problems have aroused people's widespread concern

Method used

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  • Avermectin water dispersible granule and its preparation method
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Effect test

Embodiment 1

[0040] The preparation method of Abamectin water-dispersible granule, the method comprises the following steps:

[0041] Prescription (percentage by weight): Abamectin 5%, polycarboxylate dispersant 1%, alkylsulfonate wetting agent 0.5%, sodium carbonate 1%, light calcium carbonate filler: surplus, make up to 100%.

[0042] Operation steps: put avermectin, polycarboxylate dispersant, alkylsulfonate wetting agent, sodium carbonate, light calcium carbonate and kaolin in the container in sequence according to the above formula, and then pour into the stirring mixer Mix well. Grind evenly in a jet mill. Add 10% (mass ratio) of water to the pulverized powder, and knead in a mixer to make the material agglomerate into blocks. The kneaded material is extruded and granulated by an extrusion granulator. Put the extruded particles in an oven, and control the temperature of the oven to be 54°C for drying. Shaping and sieving are carried out after drying, and qualified products are o...

Embodiment 2

[0044] The preparation method of Abamectin water-dispersible granule, the method comprises the following steps:

[0045] Formula (percentage by weight): 25% of abamectin, 3% of polycarboxylate dispersant, 3% of anionic wetting agent, 1% of layered crystalline sodium disilicate, and 68% of kaolin.

[0046] Operation steps: put avermectin, polycarboxylate dispersant, anionic wetting agent, layered crystalline sodium disilicate and kaolin in the container in sequence according to the above formula, then pour into a stirring mixer and mix evenly. Grind evenly in a jet mill. Add 15% (mass ratio) of water to the pulverized powder, and knead in a mixer to make the material agglomerate into blocks. The kneaded material is extruded and granulated by an extrusion granulator. The extruded pellets were dried in an oven. Shaping and sieving are carried out after drying, and qualified products are obtained after sieving.

Embodiment 3

[0048] The preparation method of Abamectin water-dispersible granule, the method comprises the following steps:

[0049] Formula (percentage by weight): 50% of abamectin, 10% of polycarboxylate dispersant, 5% of anionic wetting agent, 10% of layered crystalline sodium disilicate, and 25% of kaolin.

[0050] Operation steps: put avermectin, polycarboxylate dispersant, anionic wetting agent, layered crystalline sodium disilicate and kaolin in the container in sequence according to the above formula, then pour into a stirring mixer and mix evenly. Grind evenly in a jet mill. Add 12% (mass ratio) of water to the pulverized powder and knead in a mixer to make the material agglomerate into blocks. The kneaded material is extruded and granulated by an extrusion granulator. The extruded pellets were dried in an oven. Shaping and sieving are carried out after drying, and qualified products are obtained after sieving.

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Abstract

The invention relates to an avermectin water dispersible granule and its preparation method. The granule comprises the following components by weight percent: 5-50 of avermectin, 1-10 of a dispersing agent, 0.5-5 of a wetting agent, 1-10 of a disintegrating agent, and the balance filler. The preparation method consists of: mixing the above raw materials well and milling the mixture in a jet mill uniformly, then adding water to mix the mixture into blocks, and conducting extruding granulation, placing an extruded granule into a drying oven for drying, finally carrying out reshaping and screening, thus obtaining a product. Compared with prior art, the granule of the invention has the advantages of no dust, high content of effective components, easy disintegration in water, good dispersibility, and high suspension rate, etc.

Description

technical field [0001] The present invention relates to a kind of pesticide and preparation method thereof, especially relate to a kind of avermectin water-dispersible granule and preparation method thereof Background technique [0002] In recent years, great changes have taken place in global pesticide policies, especially the strict restrictions on the use of highly toxic and high-residue pesticides in developed countries, especially since January 1, 2007. The market demand for high-efficiency, low-toxicity, low-residue environmental-friendly pesticides will increase, while high-toxicity pesticides will be ruthlessly eliminated under the ban. Restricting and further prohibiting the use of highly toxic pesticides is the trend of social development and the need to achieve sustainable agricultural development. my country's highly toxic pesticides account for a considerable proportion, accounting for 70%, while the situation in western developed countries is the opposite, acc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N43/90A01N25/14
Inventor 冯镇泰华纯
Owner SHANGHAI NONGLE BIOLOGICAL PROD
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