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Azoxystrobin suspension concentrate and preparation method thereof

A technology of water suspension agent and azoxystrobin, which is applied in the field of novel broad-spectrum bactericidal preparations and can solve problems such as poor resistance to hard water of azoxystrobin aqueous suspension agent

Inactive Publication Date: 2017-06-09
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of poor hard water resistance of azoxystrobin aqueous suspension, and provide a kind of preparation method of stable azoxystrobin aqueous suspension;

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 15% Azoxystrobin Aqueous Suspension Concentrate

[0021] The content of each component (by weight) is 15% of the original drug of azoxystrobin, 3% of the terpolymer dispersant of carboxylate and its derivatives (Shanghai Shida Polymer Material Co., Ltd.); thickener xanthan gum (2% aqueous solution) 5%, magnesium aluminum silicate 0.5%, defoamer silicone 0.5%, sodium benzoate 0.2% and ethylene glycol 4% (Aladdin Reagent Shanghai Co., Ltd.), pH regulator appropriate amount to make water suspension The pH value is 6-8. Add deionized water to l00%.

[0022] In the first step, add carboxylate and its derivatives terpolymer dispersant dispersant, ethylene glycol, sodium benzoate, magnesium aluminum silicate, silicone defoamer to deionized water and mix evenly, then add azilla The ester raw material is continuously sanded by a horizontal sand mill, the sanding temperature is controlled below 40°C, and the sanding is stopped after the particle size reaches the requirement;

...

Embodiment 2

[0027] 20% Azoxystrobin Aqueous Suspension Concentrate

[0028] The content of each component (by weight) is 20% of the original drug of azoxystrobin, 3.5% of the terpolymer dispersant of carboxylate and its derivatives (Shanghai Shida Polymer Material Co., Ltd.); thickener xanthan gum (2% aqueous solution) 5%, magnesium aluminum silicate 0.3%, defoamer organosilicon 0.5%, sodium benzoate 0.2% and ethylene glycol 4%, pH adjuster in appropriate amount to make the pH value of the aqueous suspension be 6-8. Add deionized water to l00%. The specific preparation is carried out according to Example 1.

[0029] Effective content, 20%: appearance, light yellow homogeneous liquid; average particle size: 4.10μm; normal temperature dispersion stability: qualified; cold storage dispersion stability: qualified; hot storage dispersion stability: qualified; dispersibility: cloudy in water Dispersion; Suspension rate, 97.88%.

Embodiment 3

[0031] 25% Azoxystrobin Aqueous Suspension Concentrate

[0032] The content of each component (by weight) is 25% of the original drug of azoxystrobin, 4% of the terpolymer dispersant of carboxylate and its derivatives (Shanghai Shida Polymer Material Co., Ltd.); the thickener xanthan gum (2% aqueous solution) 3%, magnesium aluminum silicate 0.2%, defoamer silicone 0.8%, sodium benzoate 0.2% and ethylene glycol 4%, pH adjuster in an appropriate amount to make the pH value of the water suspension agent 6-8. Add deionized water to l00%. The specific preparation is carried out according to Example 1.

[0033] Effective content, 25%: appearance, light yellow homogeneous liquid; average particle size: 4.34μm; normal temperature dispersion stability: qualified; cold storage dispersion stability: qualified; heat storage dispersion stability, qualified; dispersibility: cloudy in water Dispersion; Suspension rate, 98.23%.

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Abstract

The invention discloses an azoxystrobin suspension concentrate. The technical scheme is as follows: the azoxystrobin suspension concentrate is prepared from the following ingredients in percentage by weight: 15% to 40% of azoxystrobin, 1% to 6% of wetting dispersant, 0.5% to 5% of thickener, 0.1% to 0.5% of antifoamer, 3% to 10% of antifreezer, 0.1% to 0.5% of preservative, 0.1% to 0.3% of pH regulator and the balance of water, wherein the total mass percent is 100%. The invention further discloses a preparation process for the azoxystrobin suspension concentrate. The azoxystrobin suspension concentrate and the preparation method thereof have the advantages that by adopting a novel processing method and a novel assistant system, the hard water resistance and dispersion stability of the suspension concentrate can be remarkably improved, and the problems, i.e., easiness in bleeding, bottom clinging and Ostwald ripening are solved.

Description

technical field [0001] The invention relates to a novel broad-spectrum bactericidal preparation, in particular to an azoxystrobin aqueous suspension and a preparation method thereof. Background technique [0002] Azoxystrobin (Azoxystrobin) is a brand-new β-methoxyacrylic acid lipid fungicide, which inhibits the mitochondrial respiration of pathogenic fungi and destroys the energy synthesis of pathogenic bacteria, and has triple effects of protection, treatment and eradication. It can be used for stem and leaf spray, seed treatment, and soil treatment. It is effective against almost all fungal diseases (Ascomycetes, Basidiomycetes, Oomycetes and Deuteromycetes), such as powdery mildew, rust, glumes, net spot, downy mildew, rice blast, etc. activity, and no cross-resistance with existing fungicides. It is safe for cereals, rice, grapes, potatoes, vegetables, fruit trees and other crops. [0003] The azoxystrobin preparations currently sold in the domestic market mainly inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/54A01N25/04A01P3/00
Inventor 任天瑞张树鹏张雷桂奇峰郭振豪李新忠赵磊李成浩
Owner SHANGHAI NORMAL UNIVERSITY
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