Water-dispersible granule containing paraquat dichloride and its preparing method

Abstract

The present invention relates to a water dispersible granule containing Paraquat Dichloride and preparation method thereof. The paraquat, an active component of a nonselective herbicide, is generally known to be inactive due to its strong adsorption to minerals in the soil, particularly to extender such as clay, bentonite, talc, pyrophyllite, montmorillonite, etc. Paraquat is transformed into the water dispersible granule type, so that the dispersible granule type can have safety to human body and superior agrichemical effect than other formulation types such as soluble concentrate type or wettable powder type. The agrichemical composition according to the present invention is prepared by mixing and kneading 5-50 wt.% of paraquat, 5-30 wt.% of surfactant, 1-2 wt.% of disintergrant and the rest of carrier, forming granules out of kneaded mixture, and drying the granules.

Description

technical field [0001] The present invention relates to a water-dispersible granule containing paraquat dichloride (hereinafter referred to as "paraquat") and a preparation method thereof. Paraquat, an active ingredient of a non-selective herbicide, is generally known to exhibit no herbicidal activity due to its strong adsorption to minerals in the soil. More specifically, the present invention relates to a water-dispersible granule containing paraquat and a preparation method thereof, comprising 5-50% by weight of paraquat, 5-30% by weight of a surfactant, and 1-20% by weight of a rupture accelerator The remaining supplement is mixed and kneaded, the kneaded mixture is formed into granules using a granulator, and these granules are dried. Background technique [0002] Soluble concentrates of paraquat currently on the market at a concentration of 24.5% can cause skin damage and can be absorbed through the skin when it comes into contact with the skin. ...

AI Technical Summary

Problems solved by technology

[0003] When anionic surfactants are added to increase the stickiness between leaves and paraquat, there may be problems with cohesion or precipitation between paraquat and anionic surfactants

However, the water soluble granules are less effective than soluble concentrates and cost more since it is prepared in two components

[0006] Moreover, there is also an attempt to prepare wettable powders of paraquat compositions, which has the problem of poisoning after inhalation of said dispersible powders and involves decontamination of paraquat and thus increases costs