Preparation method of pesticide water dispersible granules having fast disintegration property

Abstract

The invention discloses a preparation method of a water dispersible granule pesticide. The method comprises the following steps of: firstly, adding and mixing pesticide active ingredients, a dispersants, a wetting agent, and an auxiliary disintegration agent in a mixer in a certain weight ratio; secondly, pulverizing the mixed materials with a fluid bed air flow pulverizer; thirdly, mixing the pulverized materials with fillers in a second conical mixer proportionally, and finally, placing the mixed materials into a moisture adding mixer, adding water and extruding the mixed materials for palletizing, or directly placing the mixed materials into a pelletizer to perform water spraying, palletizing and drying, wherein the fillers are grain raw materials of which grain diameters are 30 to 60 mu m. The disintegration time of the water dispersible granule pesticide prepared by the preparation method is about 20 seconds, which is 1/3 of the similar pesticide products generally sold in the market at present, so that the stirring time of the pesticide is greatly reduced, and the working efficiency of users, especially farms and units using large quantities of the products, can be obviously increased.

Description

technical field [0001] The invention relates to the technical field of pesticides, in particular to a method for manufacturing a water-dispersible granule pesticide with rapid disintegration performance. Background technique [0002] Water-dispersible granules refer to the granules used after disintegrating and dispersing in water. It was initially successfully developed by the Swiss Ciba-Geigy company in the 1980s, and the sales volume increased year by year after the mid-1980s. The dosage form looks like granules, and the active ingredient is generally 60-90%. After it is put into water and stirred, it can be uniformly dissolved and dispersed in water like a wettable powder. Therefore, it has the characteristics of wettable powder and emulsion. Based on the analysis of the physical properties of the dosage form, water-dispersible granules are a new dosage form with the most superiority and competitiveness among the current pesticide dosage forms. The main components of th...

AI Technical Summary

Problems solved by technology

At present, there are not many manufacturers of water-dispersible granules in China, and the production technology and quality of finished products are uneven. The disadvantages of slow disintegration speed and unsatisfactory suspension rate of active ingredients are common.

Images