Micro-capsule suspending agent of pretilachlor and preparation method of micro-capsule suspending agent

A technology of microcapsule suspending agent and pretilachlor, applied in the field of pesticides, can solve the problems of poor weed effect, difficult storage, and difficulty in meeting the preparation requirements of weed control pesticides.

Active Publication Date: 2017-04-19
江苏明德立达作物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The pretilachlor microcapsule suspension obtained by the traditional preparation method is prone to agglomeration and solidification, which makes it difficult to store, and the effect of controlling weeds in crops is poor, and it is difficult to meet the preparation requirements of weed control pesticides

Method used

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  • Micro-capsule suspending agent of pretilachlor and preparation method of micro-capsule suspending agent
  • Micro-capsule suspending agent of pretilachlor and preparation method of micro-capsule suspending agent
  • Micro-capsule suspending agent of pretilachlor and preparation method of micro-capsule suspending agent

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preparation example Construction

[0009] The present disclosure provides a preparation method of pretilachlor microcapsule suspension, which may include the following steps: (1) uniformly mixing the first solution and the second solution to obtain the first material; wherein, the first solution Contains melamine-formaldehyde resin prepolymer aqueous solution; the second solution contains pretilachlor emulsifiable concentrate; the weight ratio of the first solution to the second solution can be (1-4): 1; (2) the The first material is uniformly mixed with the buffer solution, and the pH value can be adjusted to 4-7 to obtain the second material; (3) the second material is uniformly mixed with the acidic pH value regulator, and the pH value can be adjusted to 3-4 , to obtain the third material; (4) carry out solidification and polycondensation of the third material to obtain a solidification polycondensation product, and the pH value of the solidification polycondensation product can be adjusted to 6.5-7.5; (5) th...

Embodiment 125

[0023] Example 1 25% pretilachlor microcapsule suspension

[0024] Mix melamine with a formaldehyde aqueous solution with a concentration of 37% by weight, and react for 1.5 hours at a pH of 8 and a temperature of 65° C.; add water to dilute to obtain a melamine-formaldehyde resin prepolymer aqueous solution, wherein the formaldehyde and melamine The molar ratio is 1:0.5, and the volume ratio of water and formaldehyde solution is 1:1.5.

[0025] Mix pretilachlor, 200# solvent oil and sorbitan monostearate polyoxyethylene ether to obtain pretilachlor emulsifiable concentrate, wherein, the pretilachlor and 200# solvent oil and sorbitan monostearate The weight ratio of stearate polyoxyethylene ether is 1:2.5:0.05.

[0026]Gained melamine-formaldehyde resin prepolymer aqueous solution and pretilachlor emulsifiable concentrate are mixed uniformly to obtain the first material, wherein the weight ratio of the melamine-formaldehyde resin prepolymer aqueous solution and pretilachlor e...

Embodiment 2

[0027] Example 2 25% pretilachlor microcapsule suspension

[0028] Melamine is uniformly mixed with formaldehyde aqueous solution having a concentration of 37% by weight, and reacted at a pH value of 8 and a temperature of 70°C; distilled water is added to dilute to obtain a melamine-formaldehyde resin prepolymer aqueous solution, wherein the molar amount of formaldehyde and melamine is The ratio is 1:0.5, and the volume ratio of water and formaldehyde solution is 1:2.

[0029] Mix pretilachlor, 200# solvent oil and sorbitan monostearate polyoxyethylene ether to obtain pretilachlor emulsifiable concentrate, wherein, the pretilachlor and 200# solvent oil and sorbitan monostearate The weight ratio of stearate polyoxyethylene ether is 1:2.5:0.05.

[0030] Gained melamine-formaldehyde resin prepolymer aqueous solution and pretilachlor emulsifiable concentrate are mixed uniformly to obtain the first material, wherein the weight ratio of the melamine-formaldehyde resin prepolymer a...

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Abstract

The invention discloses a micro-capsule suspending agent of pretilachlor and a preparation method of the micro-capsule suspending agent. The preparation method includes the steps that a first material and a buffer solution are mixed to be uniform so that the pH value can be regulated to 4 to 7, and a second material is obtained; the second material and an acid pH value regulator are mixed to be uniform so that the pH value can be regulated to 3 to 4, and a third material is obtained; solidification and condensation polymerization are conducted on the third material, and the pH value is regulated; and a solidification and condensation polymerization product subjected to pH regulation and a dispersing agent are mixed to be uniform, and a fourth material is obtained. The micro-capsule suspending agent, obtained according to the disclosed preparation method, of the pretilachlor is stable to store, the agglomeration and solidification phenomena are not likely to be generated, the lasting period is long, and weed in rice fields can be effectively prevented and treated.

Description

technical field [0001] The disclosure relates to the technical field of pesticides, in particular to a microcapsule suspension of pretilachlor and a preparation method thereof. Background technique [0002] Pretilachlor is a pre-emergence herbicide, mainly used to control grass weeds. It is safe to rice and has a wide spectrum of weed control. Weed seeds absorb pesticides during germination, and the roots absorb poorly, so they can only be used as pre-emergence soil treatment. In addition, other preparations of pretilachlor on the market contain a large amount of organic solvents and pollute the environment. Therefore, new dosage forms need to be developed to solve this problem. [0003] The pretilachlor microcapsule suspension obtained by the traditional preparation method is prone to agglomeration and solidification, which makes it difficult to store and has poor control effects on crop weeds, making it difficult to meet the preparation requirements of weed control pest...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N37/22A01N25/04A01N25/28A01P13/00
CPCA01N25/04A01N25/28A01N37/22
Inventor 高敬雨马超徐妍东琴潘静刘润峰
Owner 江苏明德立达作物科技有限公司
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