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Microcapsule suspension-suspending agent of terbuthylazine and s-metolachlor, preparation method and application thereof

A technology for the suspension of refined metolachlor and microcapsules, which is applied in the field of pesticides, can solve the problems of affecting the healthy growth and yield of crops, prone to phytotoxicity, harmful ecological environment and users, etc., so as to reduce the dosage, Good storage stability and the effect of reducing the number of medications

Inactive Publication Date: 2019-09-20
PILAR SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the refined metolachlor in the market is mainly emulsifiable concentrate. The use and release of a large amount of organic solvents is not only harmful to the ecological environment and users, but also prone to phytotoxicity, affecting the healthy growth of crops and the guarantee of yield.

Method used

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  • Microcapsule suspension-suspending agent of terbuthylazine and s-metolachlor, preparation method and application thereof
  • Microcapsule suspension-suspending agent of terbuthylazine and s-metolachlor, preparation method and application thereof
  • Microcapsule suspension-suspending agent of terbuthylazine and s-metolachlor, preparation method and application thereof

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preparation example Construction

[0021] The first aspect of the present invention: provide a kind of preparation method of the microcapsule suspension-suspension of terbuthine and pure metolachlor, the method comprises the following steps: a, amino resin prepolymer aqueous solution and pure metolachlor Grass ammonium emulsifiable concentrate is (0.8-5): 1 mixes by weight, obtains the first material; b, the described first material obtained in step a is mixed with buffer solution, obtains the second material, the The pH value is 5-7; c, mixing the second material obtained in step b with an acidic solution to obtain a third material, the pH value of the third material is 3-4; d, at a temperature of 40- Treat the third material obtained in step c for 2-7 hours under the condition of 70° C. to obtain the fourth material; e, mix the fourth material obtained in step d with terbutyline suspending agent and emulsifying dispersant The mixture is mixed at a weight ratio of 1:(0.1-1):(0.01-2) to obtain a microcapsule su...

Embodiment 1

[0043] Mix melamine, formaldehyde and water, and react for 1.5 hours at a pH value of 8 and a temperature of 70°C to obtain a melamine-formaldehyde resin prepolymer aqueous solution, wherein the molar ratio of formaldehyde to melamine is 1:0.5, and water and formaldehyde The weight ratio is 2.8:1.

[0044] Mix the refined metolachlor, 200# solvent oil and sorbitan monostearate polyoxyethylene ether to obtain the refined metolachlor emulsifiable concentrate, wherein the refined metolachlor, 200 #The weight ratio of solvent oil and sorbitan monostearate polyoxyethylene ether is 1:2.5:0.05.

[0045] Melamine-formaldehyde resin prepolymer aqueous solution and refined metolachlor emulsifiable concentrate are mixed uniformly at a weight ratio of 4:1 at a stirring speed of 300 rpm to obtain the first material; then at room temperature, the pH value is 4.5. The acetic acid-sodium acetate buffer solution whose total concentration of the buffer pair is 2% by weight is uniformly added t...

Embodiment 2

[0049] Mix melamine, formaldehyde and water and react for 1.5 hours at a pH value of 8 and a temperature of 70°C to obtain a melamine-formaldehyde resin prepolymer aqueous solution, wherein the molar ratio of formaldehyde to melamine is 1:1, and water and formaldehyde The weight ratio is 3.5:1.

[0050] Mix the refined metolachlor, 150# solvent oil and sodium lignosulfonate evenly to obtain refined metolachlor emulsifiable concentrate, wherein, the refined metolachlor, 150# solvent oil and lignosulfonic acid The weight ratio of sodium is 1:0.5:0.1.

[0051] Melamine-formaldehyde resin prepolymer aqueous solution and refined metolachlor emulsifiable concentrate are mixed uniformly at a weight ratio of 2:1 at a stirring speed of 200 rpm to obtain the first material; then at room temperature, the pH is 3. The acetic acid-sodium acetate buffer solution whose total concentration of the buffer pair is 2% by weight is uniformly added to the above-mentioned first material within 1 ho...

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Abstract

The invention relates to the field of pesticides, and particularly provides a microcapsule suspension-suspending agent of terbuthylazine and s-metolachlor, a preparation method and an application thereof. The preparation method comprises the following steps: a, mixing an amino resin prepolymer aqueous solution with s-metolachlor emulsifiable concentrate according to a weight ratio of (0.8-5):1 to obtain a first material; b, the first material is mixed with a buffer solution to obtain a second material, wherein the pH value of the second material is 5-7; c, the second material is mixed with an acid solution to obtain a third material is obtained, wherein the pH value of the third material is 3-4; d, treating the third material at the temperature of 40-70 DEG C for 2-7 hours to obtain a fourth material; and e, mixing the fourth material with a terbuthylazine suspending agent and an emulsifying dispersant according to a weight ratio of 1:(0.1-1):(0.01-2). The prepared terbuthylazine and s-metolachlor microcapsule suspension-suspending agent has relatively good storage stability, can slowly release and control various weeds of crops for a long time, can reduce the pesticide use frequency and dosage, saves the cost, and reduces the environmental pollution.

Description

technical field [0001] The invention relates to the field of pesticides, in particular to a microcapsule suspension-suspension agent of terbuthine and pure metolachlor and its preparation method and application. Background technique [0002] Purified metolachlor is an acetamide selective herbicide developed by Syngenta. It is based on metolachlor and uses advanced technology to successfully remove the inactive R-body. The refined active S -body. In addition to the advantages of metolachlor, refined metolachlor is superior to metolachlor in terms of safety and control effects. At the same time, according to the results of toxicology studies, its toxicity is higher than that of metolachlor Amines are low, even only one-tenth of the toxicity of the latter. S-metolachlor is suitable for a wide range of crops, and is the main herbicide for corn and sorghum, which are important food crops in the world. At present, the refined metolachlor in the market is mainly emulsifiable con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/28A01N25/04A01N43/70A01N37/22A01P13/00
CPCA01N25/04A01N25/28A01N37/22A01N43/70
Inventor 陈坤罗湘仁李洪军殷强陆建才刘润峰高敬雨潘静周同磊张磊陶代雨王洋
Owner PILAR SHANGHAI CO LTD
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