Water surface self-diffusion floating granules and preparation method thereof

Abstract

The invention discloses water surface self-diffusion floating granules and a preparation method thereof and belongs to the field of pesticide processing. The water surface self-diffusion floating granules are composed of 0.5-70% of pesticide active ingredient, 0.5-60% of buoyancy auxiliary, 0.2-30% of water surface extender, 0.05-10% of dispersant, 0.1-5% of wetting agent, 5-20% of disintegrant and the balance of filler. The preparation method includes: 1), sanding the pesticide active ingredient into a water suspension or an oil suspension; 2), well mixing the buoyancy auxiliary, the water surface extender, the dispersant, the wetting agent, the disintegrant and the filler, well mixing with size ground well in the step 1), adding a certain amount of water for kneading granulation. Wet sanding is adopted in the preparation method, so that no dust is generated in the preparation process; the granules prepared by the method are small in grain size after being disintegrated in water and can form a film which is more continuous; by adding a diffusant with excellent performance, the granules can automatically diffuse on the water surface, diffusion distance and speed and disintegration speed can be adjusted, and the granules can automatically avoid when coming across obstacles and don't get together around the obstacles to cause pesticide damage; the water surface self-diffusion floating granules are an ideal self-diffusion floating granule preparation.

Description

technical field [0001] The invention relates to the technical field of pesticides, in particular to a self-diffusion floating granule and a preparation method thereof. Background technique [0002] The problems existing in the traditional formulations of pesticides, such as dust pollution in the processing of wettable powders, toluene and xylene in emulsifiable concentrates, etc. have gradually been exposed and attracted people's attention. Some pesticide formulations with high safety factor, good economic benefits, and labor-saving are replacing them. Those traditional dosage forms with high dosage, high toxicity and serious environmental pollution are developing towards water-based, granular, slow-release, multi-functional and labor-saving. [0003] Floating granules are a kind of labor-saving dosage form. "Labor-saving" has become a hot spot in pesticide research and development. The labor-saving dosage forms such as spraying or spraying not only save time and effort, bu...

AI Technical Summary

Problems solved by technology

At present, most of the domestic floating granule preparation processes use the jet milling process. The jet milling preparation process has high cost, complicated operation, high energy consumption, dust will be generated during the preparation process, and the environment will be polluted.

For example, CN201310043145 introduces a floating granule with stable performance, high suspension rate and reliable quality, whose effective ingredients are penoxsulam and pyrazosulfuron-methyl; CN201310448663 discloses a floating granule whose active ingredient is oxadiazone propargyl; CN201410670721 and CN201310710822 provide good paddy field weeding floating large granules with diffusion performance; CN201410056541 (Sumitomo Chemical Co., Ltd.) provides a novel water surface floating granule insecticide, using a specific combination of surfactants; but their common points are all The preparation process adopts first coarse crushing and then airflow crushing, which will generate a lot of dust in the process, pollute the environment, complex process, high energy consumption, high cost, coarse particles after disintegration in water, and uneven film formed, so it is impossible to prepare Environmentally friendly floating granules

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