Preparation of composite synergistic wetting agent and application thereof in pymetrozine aqueous suspending agent

Abstract

The invention relates to a composite synergistic wetting agent and a preparation method thereof. The components comprise 30-50 % of tristyrylphenol ethoxylates phosphate; 20-30 % of maleic acid-acrylic acid copolymer sodium salt; 10-20 % of tristyrylphenol ethoxylates succinic acid monoester sodium sulfonate; and 10-20 % of propylene glycol block polyether. The composite synergistic wetting agenthas excellent wetting and dispersing performance, and the combination of the auxiliary agent components of the invention is adopted to provide surface energy for original drug particles, the particlesare wrapped to form steric hindrance, electrostatic repulsion and to destroy the hydrogen bond combination of the compound and water. The invention further provides the application of the composite synergistic wetting agent in pymetrozine and a composite aqueous suspending agent combined with pymetrozine and other original drugs (clothianidin), which has good universality for the original drug ofthe pymetrozine produced by different processes, and the obtained preparation agent has 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...

Examples

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, 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).

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...

Examples

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, 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).

Images