Solid or liquid pesticide composition of cyclodextrin and dipyridyl herbicide clathrate compound, and preparation method of composition

Abstract

The invention discloses a solid or liquid pesticide composition of cyclodextrin and a dipyridyl herbicide clathrate compound. The solid or liquid pesticide composition comprises dipyridyl herbicide and cyclodextrin according to the mass ratio of 1: (0.5-1:9). The invention also discloses a preparation method of the solid or liquid pesticide composition of the cyclodextrin and the dipyridyl herbicide clathrate compound. The method comprises the following steps: mixing 9 parts by mass of cyclodextrin and 9-63 parts by mass of water; adding 1-18 parts by mass of dipyridyl herbicide to fully mix; heating to 60-80 DEG C in a dark condition and stirring, so that the system is completely or evenly dissolved; carrying out heat preservation for an hour; preparing the liquid pesticide composition from the system which is completely dissolved into a solution; and preparing the powdery solid pesticide composition from the evenly dissolved system. The pesticide composition disclosed by the invention can be in a solid state or a liquid state; the dipyridyl herbicide clathrate compound is strong in activity, stable in property, and long in quality guarantee period; the thrill is lower than that of a common water reducing agent; a contact damage of people and livestock is reduced; the pesticide composition is not easily diffused to pollute the environment.

Description

technical field [0001] The invention relates to a new type of pesticide composition of bipyridine herbicides, in particular to a solid or liquid pesticide composition of cyclodextrin and bipyridine herbicide clathrates and a preparation method. Background technique [0002] The herbicides with bipyridine cationic structure widely used in agriculture and forestry mainly include paraquat and diquat. Paraquat (Paraquat), common trade name: Gramoxone (Gramoxone), chemical name: 1-1'-dimethyl-4-4'-bipyridine cationic salt, this product forms salts with different acid radicals, the common ones are Two products of dichloride and monomethyl bissulfate, respectively: paraquat dichloride, molecular formula: C 12 h 14 C 12 N 2 , molecular weight: 257.2; paraquat disulfate monomethyl ester salt, molecular formula: C 14 h 20 N 2 o 8 S 2 , molecular weight: 408.44. Paraquat dichloride is a colorless crystal with a melting point of 300°C (decomposition), and its monomethyl bissul...

AI Technical Summary

Problems solved by technology

[0005] The prior art works from the aspects of improving dosage forms, improving safety and enhancing effects. CN1247026A combines emesis, malodor, surfactant and adsorbent with paraquat to prepare a solid or semi-solid dosage form product. Due to the use of Insoluble adsorbent, the incomplete dissolution of the preparation affects the drug activity

CN1192708C prepares disperse granules with a combination of various components, and the killing effect on weeds is not significantly different from that of existing water-based products

In the technology disclosed in CN1618289A, hydrochloric acid and synergist are added to paraquat aqueous solution to make a combination of herbicides. Compared with the original product, there is no significant change in the use effect, and its high content of hydrochloric acid not only reduces product safety but also increases post-use chemical pollution

Since paraquat is a solid product with strong water solubility and relatively stable chemical properties, there are no relevant reports on the application of cyclodextrin in improving paraquat preparations and enhancing its activity.

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