Solvent composition for pyrazol and pyrrole pesticide microemulsion

Abstract

The invention discloses a solvent composition for pyrazol and pyrrole pesticide microemulsion. The solvent composition comprises the following components in percentage by weight: 2-25% of methylal, 2-15% of methyl cellosolve and 0.5-8% of white oil. The solvent composition is applied to formulations of the microemulsion of effective constituents of pyrazol and pyrrole pesticides and is used for replacing the conventional solvent and overcoming the defects that the conventional solvent is instable and is easily devitrified and layered under a conventional solvent system; being a solvent of the effective constituents of the pyrazol and pyrrole pesticides, the solvent composition shows an obvious synergistic effect in a mite killing process; and the solvent composition is pollution-free to the environment, is harmless to human and livestock and has the characteristic of simple preparation method.

Description

technical field [0001] The invention relates to the technical field of pesticide solvents, in particular to a solvent composition for pyrazole and pyrrole pesticide microemulsions. Background technique [0002] Some hydrophilic polar solvents such as alcohols, ketones, and amides currently used in pesticide microemulsions are equivalent to the acute toxicity of xylene (some such as dimethylformamide are carcinogens), and these hydrophilic polar solvents It is difficult to remove polar solvents after they seep into crops, soil and groundwater, and it is more difficult to separate them than benzene-based non-polar solvents. Chronic toxicity to these substances cannot be ignored either, and they pose new threats to the environment and food safety, as well as problems harmful to humans, animals and environmental protection. In the current technology, the report on the application of aromatic hydrocarbon solvents to pyrazole and pyrrole pesticide microemulsions has "microemulsio...

AI Technical Summary

Problems solved by technology

[0002] Some hydrophilic polar solvents such as alcohols, ketones, and amides currently used in pesticide microemulsions are equivalent to the acute toxicity of xylene (some such as dimethylformamide are carcinogens), and these hydrophilic polar solvents It is difficult to remove polar solvents after they seep into crops, soil and groundwater, and it is more difficult to separate them than benzene-based non-polar solvents

The chronic toxicity of these substances can not be ignored, they will pose a new threat to the environment and food safety, and also cause problems harmful to humans, animals and environmental protection

In the current technology, the report on the application of aromatic hydrocarbon solvents to pyrazole and pyrrole pesticide microemulsions has "microemulsion composition containing insecticide chlorfenapyr or chlorfenapyr+monosultap and preparation method thereof" (published No.: CN1232170C), this patent document uses solvent aromatic hydrocarbon solvents such as benzene, toluene, xylene, and cyclohexanone, etc., these solvents are more polluting to the environment

These solvent components degrade slowly and have large residues, causing secondary pollution to the environment

And these aromatic hydrocarbon solvents are applied to the microemulsion formulation of active ingredients of pyrrole and pyrazole pesticides, the content of microemulsion of active ingredients of pyrazoles and pyrrole pesticides is not high, and some preparations are easy to freeze at low temperature, and have poor fluidity and instability , the defect of easy devitrification and delamination

[0003] Therefore, as human beings have higher and higher requirements for the environment, pesticide companies urgently need to find solvent compositions with good stability, environment-friendly and low toxicity to replace the above-mentioned unenvironmental solvents, and solve the problems of pyrazoles and pyrroles at the same time. Microemulsion preparations, active ingredients of pesticides, use aromatic hydrocarbons as solvents, which are prone to crystallization, freezing, delamination, poor fluidity, instability and other defects at low temperature

Images