Preparation of compound synergistic wetting agent and its application in aqueous suspension of pymetrozine

A compound synergistic and wetting agent technology, which is applied in the fields of application, insecticide, biocide, etc., can solve the problem that the pymetrozine aqueous suspension preparation is difficult to make, the pymetrozine suspension has large fluctuations, and the production batch Great impact and other problems, to achieve the effect of excellent stability over time, good steric resistance performance, and no increase in heat storage particle size

Active Publication Date: 2021-03-09
GUANGZHOU FANGZHONG CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, as people pay more and more attention to environmental protection, the proportion of water-based formulations is increasing, especially water-suspension formulations. Due to the special high water solubility of pymetrozine, and the final process of the original drug synthesis, the desolventization is not easy to remove. , there is a small amount of solvent residue, which makes it difficult to prepare the pymetrozine aqueous suspension. The product is too viscous before sanding, or the pouring property is poor after sanding, and the automatic dispersion is poor.
However, pymetrozine technical is greatly affected by the production process and production batch of each manufacturer, which makes the production of pymetrozine suspension concentrate fluctuate greatly. At present, there is basically no set of general additives suitable for each manufacturer and batch in China The second pymetrozine original drug is used as an aqueous suspension, and the existing adjuvants still have relatively large defects

Method used

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  • Preparation of compound synergistic wetting agent and its application in aqueous suspension of pymetrozine
  • Preparation of compound synergistic wetting agent and its application in aqueous suspension of pymetrozine
  • Preparation of compound synergistic wetting agent and its application in aqueous suspension of pymetrozine

Examples

Experimental program
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Effect test

Embodiment 4

[0053] Example 1 Preparation of Tristyrylphenol Polyoxyethylene Ether Phosphate Salt

[0054] Add 137 parts of tristyrylphenol polyoxyethylene ether (20EO) to a reactor with a thermometer, agitator, reflux pipe, and dropping pipe, and then add 7.1 parts of phosphorus pentoxide, and keep the temperature below 50°C , with mechanical stirring at 200rpm / min, after 4 hours of reaction. Then control the temperature to 90°C, add 5.8 parts of boiling water, keep the temperature at 90°C for 1 hour, then lower the temperature to 30-40°C, add diethanolamine dropwise to adjust the pH value of the reaction product to neutral, and obtain tristyrylphenol polyoxyethylene ether phosphoric acid Ester Salt (A).

Embodiment 2

[0055] The preparation of embodiment dimaleic acid-acrylic acid copolymer sodium salt

[0056] Add 15 parts of maleic acid, 35 parts of methacrylic acid, and 90 parts of deionized water into a reactor with a thermometer, agitator, reflux tube, and dropping tube, and slowly add 30% aqueous sodium hydroxide solution to the pH value Neutral, keep the temperature at 30-50°C, then raise the temperature to 70-80°C, add 1 part of ammonium persulfate initiator, and keep it at 70-80°C for 2 hours to obtain the maleic acid-acrylic acid copolymer sodium salt (B).

Embodiment 6

[0057] The preparation of embodiment tristyrylphenol polyoxyethylene ether succinate monoester sulfonic acid sodium salt

[0058] Add 137 parts of tristyrylphenol polyoxyethylene ether (20EO) and 9.8 parts of maleic anhydride to a reactor equipped with a thermometer, agitator, reflux pipe, and dropping pipe, and keep the reaction at 60-65°C for 2 hours, then 12.6 parts of sodium sulfite and 295 parts of deionized water were added, and the reaction was carried out at 60-65° C. for 2 hours to obtain tristyrylphenol polyoxyethylene ether succinate monoester sulfonic acid sodium salt (C).

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Abstract

The invention relates to a composite synergistic wetting agent and a preparation method thereof. The components include: tristyrylphenol polyoxyethylene ether phosphate ester salt 30-50%; maleic acid-acrylic acid copolymer sodium salt 20-30% , tristyrylphenol polyoxyethylene ether sodium succinate monoester sulfonate 10‑20%; propylene glycol block polyether 10‑20%. The composite synergistic wetting agent has excellent wetting and dispersing properties. The combination of the auxiliary components of the present invention provides surface energy for the original drug particles, wraps the particles, forms steric hindrance, electrostatic repulsion, and destroys compounds and water. of hydrogen bonding. The present invention also provides the application of the composite synergistic wetting agent in pymetrozine and the composite aqueous suspension preparation of pymetrozine and other original drugs (clothianidin), and the original drug of pymetrozine produced by different processes It has good versatility, and the obtained preparation can have good stability.

Description

technical field [0001] The invention relates to the field of pesticide adjuvants, in particular to a composite synergistic wetting agent, a preparation method thereof, and an application thereof in an aqueous suspension of pymetrozine. Background technique [0002] As an emerging pesticide substitute, pymetrozine not only has good efficacy, but also has no harm to crops, environment and ecology. It is especially suitable for resistance management and comprehensive control, and represents the development direction of pesticides in the future. As the world pays more and more attention to environmental protection, the demand for low-toxicity, high-efficiency, and environment-friendly pesticides will increase year by year, and pesticides with high toxicity, high residues, and large impact on the ecological environment will be eliminated. Pymetrozine is an alternative product of the existing organophosphorus pesticides, and it is a key field in the national medium and long-term s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/30A01N25/00A01N25/04A01N43/707A01N51/00A01P7/04
CPCA01N25/00A01N25/04A01N25/30A01N43/707A01N51/00
Inventor 陈小阳贺满芳
Owner GUANGZHOU FANGZHONG CHEM CO LTD
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