High-content 2,4-dripping agent capable of rapidly and spontaneously recovering after low-temperature crystallization

Abstract

The invention discloses a high-content 2,4-dripping agent capable of quickly and spontaneously recovering after low-temperature crystallization, wherein the high-content 2,4-dripping agent is mainly composed of the following components in percentage by weight: 60-80% of a 2,4-dripping salt, 0.01-5% of cellulose ether, and the balance of water. The invention also discloses a preparation method of the high-content 2,4-dripping agent. After the high-content 2,4-dripping agent is crystallized in a low-temperature severe environment in winter, when the temperature is recovered to 17 DEG C or above,the crystals can be spontaneously dissolved and rapidly recovered to form a homogeneous-phase liquid, manual heating and stirring are not needed, production and use are convenient, and the w high-content 2,4-dripping agent can be used for preventing and treating various farmland broadleaf weeds.

Description

Technical field: [0001] The invention belongs to the field of pesticide preparations, in particular to a high-content 2,4-dripping agent capable of rapid and spontaneous recovery after low-temperature crystallization. Background technique: [0002] 2,4-D is an important herbicide, its chemical name is 2,4-dichlorophenoxyacetic acid, it is mainly used in wheat fields, corn fields, etc. With a production capacity of nearly 100,000 tons, it is the world's largest producer of 2,4-D. 2,4-D preparations are mainly water preparations, emulsifiable concentrates, and soluble granules. Among them, emulsifiable concentrates are likely to cause environmental pollution due to the use of a large amount of toxic and harmful solvents, and are prone to drift and cause phytotoxicity. Therefore, emulsifiable concentrates are gradually eliminated. 2,4-D D-butyl ester emulsifiable concentrate will be banned in my country in 2023; 2,4-D soluble granules have a small market share due to complex pr...

AI Technical Summary

Problems solved by technology

[0003] The usual 2,4-D drip agent generally contains 2,4-D salt, water, and other ingredients such as surfactants, solvents, antifreeze, etc. can also be added, but it is easy to form crystals and precipitate when the temperature is lower than 17°C. After the weather gets warmer, the crystals cannot spontaneously dissolve to form a uniform solution, which leads to the need for reheating and stirring when exporting large-package products to foreign countries for sub-packaging, or crystallization of small-package products during production, transportation, and storage in winter Finally, it will not recover after being placed on the shelf for several months, which will affect the appearance of the product and the purchase desire of farmers. When spraying with water, the crystals will easily block the nozzle, and the weeding effect will also be affected due to the decrease in the concentration of the liquid medicine.

[0004] CN102696611A discloses a herbicidal composition containing 2,4-D and clopyralid, CN102413699A discloses a herbicidal composition containing 2,4-D and glyphosate, and CN102696612A discloses a herbicidal composition containing 2,4 -D and picloram herbicidal composition, CN103108546A discloses a herbicidal composition containing aminopyralid and 2,4-D and atrazine, CN103392701A discloses a herbicidal combination containing 2,4-D and dicamba None of the above patents proposed a solution to the problem of low-temperature crystallization of 2,4-dripping agents

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