A kind of surfactant and preparation method for improving pesticide droplet dispersion interface performance

A surfactant and interface performance technology, applied in the fields of botanical equipment and methods, insecticides, biocides, etc., can solve the problems of limited application and promotion process, harm to the male reproductive system, and difficult to industrialize production, etc. Effects of physical stability, reduction of liquid loss, and increased uniformity

Active Publication Date: 2020-01-17
YANGZHOU SPED CHEM
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But there is obvious defect in the pesticide synergist that adopts in the prior art: as CN107251895A discloses a kind of spray assistant and its preparation and application, this invention has higher solubility to most of existing commercially available pesticides and foliage fertilizer And stability, can improve the evaporation resistance and drift of droplets, but the spray aid uses alkylphenol polyoxyethylene ether, nonylphenol polyoxyethylene ether is a kind of alkylphenol polyoxyethylene ether, for The male reproductive system is harmful, and it is gradually included in the prohibited list, so the spray adjuvant may be potentially harmful to the human body; CN106165681A discloses an agricultural adjuvant specially used for aircraft spraying, which has excellent evaporation inhibition effect and sedimentation effect , but a new structural polymer ND-100 is used, and ND-100 is a 100% hyperbranched C8-18 fatty alcohol ethylene oxide propylene oxide block polymer, which has high production costs and is not easy for industrial production ; US20100113275A1 discloses a method for controlling pesticide spray drift with self-emulsifying esters, which is a method for reducing spray drift during the application of agrochemicals by combining self-emulsifying esters in the liquid to be sprayed, but its use process is complicated. limited in

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  • A kind of surfactant and preparation method for improving pesticide droplet dispersion interface performance
  • A kind of surfactant and preparation method for improving pesticide droplet dispersion interface performance
  • A kind of surfactant and preparation method for improving pesticide droplet dispersion interface performance

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preparation example Construction

[0050] The embodiment of the present invention discloses a preparation method of a surfactant for improving the dispersion interface performance of pesticide droplets, which specifically includes the following steps:

[0051] (1) Preparation of polyvinylamine alkoxylate B aqueous solution

[0052] (a) First add polyvinylamine A aqueous solution to the reaction kettle, then replace the air in the reaction kettle with nitrogen for 3 times, and raise the temperature to 80-90°C;

[0053] (b) feed epoxy compound again, and feed nitrogen to control the pressure to 0.15-0.35 MPa, and at the same time control the temperature to 80-90 °C, and carry out the aging reaction for 1-3 hours until the end of the pressure equilibrium reaction;

[0054] (c) Finally, evacuate the volatile components under the condition of 80-85° C. to obtain the aqueous solution of polyvinylamine alkoxylate B.

[0055] (2) Preparation of polyvinylamine alkoxy compound C

[0056] (A) First add the polyvinylamin...

Embodiment 1

[0077] The embodiment of the present invention discloses a preparation method of a surfactant for improving the dispersion interface performance of pesticide droplets, which specifically includes the following steps

[0078] (1) In a 2L reactor, add 200g, n is 4, 50% polyvinylamine aqueous solution, and replace it with nitrogen for 3 times, raise the temperature to 80-90°C, feed 205gEO, and feed nitrogen to make the pressure at 0.15-0.35MPa, and aged at 80-90°C for 1-3h, the reaction ends after the pressure remains constant. At 80-85°C, evacuate the volatile components to obtain a 65% aqueous solution of polyvinylamine alkoxylate 1B.

[0079] (2) Add 200 g of polyvinylamine alkoxylate B aqueous solution obtained in step (1) and 1.76 g of NaOH to another 2 L reaction kettle, replace it with nitrogen three times again, raise the temperature to 100-135 ° C, and dehydrate within a certain period of time to make 2 L The moisture content of the material in the reactor is less than ...

Embodiment 2

[0082] The embodiment of the present invention discloses a preparation method of a surfactant for improving the dispersion interface performance of pesticide droplets, which specifically includes the following steps:

[0083](1) In a 2L reaction kettle, add 300g, n is 10, 50% polyvinylamine aqueous solution, and replace it with nitrogen for 3 times, raise the temperature to 80-90°C, feed 614gEO, and feed nitrogen to make the pressure at 0.15-0.35MPa, and aged at 80-90°C for 1-3h, the reaction ends after the pressure remains constant. At 80-85°C, evacuate the volatile components to obtain 68% polyvinylamine alkoxylate 2B aqueous solution.

[0084] (2) Add 200 g of polyvinylamine alkoxylate B aqueous solution and 2.2 g of KOH obtained in step (1) to another 2 L reaction kettle, replace with nitrogen three times again, raise the temperature to 100-135 ° C, and dehydrate within a certain period of time to make 2 L The moisture content of the material in the reactor is less than 0...

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Abstract

The invention discloses a surfactant for improving dispersion interface performance of pesticide fogdrops. After being added into an aqueous spray solution or mixture, the surfactant can improve the interface performance of the fogdrops of a pesticide preparation; furthermore, the invention also discloses a preparation method of the surfactant for improving the dispersion interface performance ofthe pesticide fogdrops. The method is simple in preparation process, high in raw material conversion rate and production efficiency, and convenient for industrial popularization and application.

Description

technical field [0001] The invention relates to the technical field of pesticide adjuvants, in particular to a surfactant and a preparation method for improving the dispersion interface performance of pesticide droplets. Background technique [0002] Pesticides are an indispensable and important means of production in modern agricultural production, and there has always been a problem of low effective utilization in the process of use. Especially in the process of spraying pesticides, a large number of droplets formed by the pesticide liquid drift into the environment, resulting in a low effective utilization rate of the pesticide; The loss of active ingredients of some pesticides will cause environmental pollution and waste of resources. Pesticide synergist is the general term for the adjuvants used in spray application or similar application technology. By adding pesticide synergist appropriately, it can significantly improve the viscosity, deposition amount, wetting and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/04A01N25/30A01P7/04
CPCA01N25/04A01N25/30
Inventor 王磊宋文勇秦敦忠陈世国
Owner YANGZHOU SPED CHEM
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