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Pyraclostrobin suspending agent and preparation method thereof

A technology of pyraclostrobin and suspending agent, which is applied in the field of pyraclostrobin suspending agent and its preparation, and can solve problems such as uneven spraying, low suspension rate, and unstable suspension

Active Publication Date: 2020-12-08
HUIZHOU YINNONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN109006851A discloses a pesticide composition suspension containing flumorph and pyraclostrobin and its preparation method. This patent can only grind the particle size of the material to 2μm≤D98≤3μm. If the particle size is too large, it will easily cause suspension Low rate, uneven spraying and other problems; but if the grinding is ≤1μm, it will lead to instability of the suspension (see paragraph [0028] on page 6 of the patent specification)
[0005] Therefore, although it is possible to improve the drug efficacy by grinding the particle size of the material to ≤1 μm, how to solve the problem of maintaining a stable suspension while the particle size is ground to ≤1 μm is an urgent technical problem to be solved.

Method used

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  • Pyraclostrobin suspending agent and preparation method thereof
  • Pyraclostrobin suspending agent and preparation method thereof
  • Pyraclostrobin suspending agent and preparation method thereof

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preparation example Construction

[0024] In a second aspect, the present invention provides a method for preparing any one of the aforementioned suspending agents.

[0025] A method for preparing any one of the aforementioned suspensions, comprising the following steps: (1) dissolving a wetting and dispersing agent, an antifreeze agent, a synergist, a grinding aid and part of an antifoaming agent in water to obtain a first solution ; (2) Prepare the thickener with water to form a thickener solution with a mass fraction of 2% for use; (3) Add pyraclostrobin and part of the defoamer to the first solution and use a homogenizer to homogenize After pulverizing with a colloid mill, and grinding with a sand mill to a particle size D98≤1μm, the second solution is obtained; (4) the remaining defoamer and The thickener solution is added to the second solution and homogeneously dispersed using a homogenizer.

[0026] The water includes demineralized water, deionized water or purified water and the like.

[0027] The ho...

specific Embodiment approach

[0039] In order to enable those skilled in the art to better understand the technical solutions of the present invention, some non-limiting examples are further disclosed below to further describe the present invention in detail.

[0040] The reagents used in the present invention can be purchased from the market or can be prepared by the methods described in the present invention.

[0041] In the examples of the present invention, "heat storage water separation rate" means the percentage of the water separation volume in the total volume; the measurement method of "heat storage decomposition rate" refers to GB / T 19136-2003; the measurement method of "cold storage stability" refers to GB / T 19136-2003; T 19137-2003; the determination method of "penetration time" refers to HG / T 2575-94.

[0042] In the embodiment of the present invention, the "particle size D98" can be detected by using a laser particle size distribution instrument, and can be detected by referring to the LS-POP...

Embodiment 1

[0044] Example 1: Screening of wetting and dispersing agents

[0045] According to the prescription described in Table 1 and the wetting and dispersing agent described in Table 2, pyraclostrobin suspension concentrate was prepared, and its particle size D98, surface tension, penetration time and heat storage and water separation rate were tested. The results are shown in Table 2.

[0046] Table 1: Screening formulations of wetting and dispersing additives

[0047]

[0048] Preparation:

[0049] (1) Dissolve the wetting and dispersing agent, antifreeze, synergist, grinding aid and one-third of the prescription ratio in water to obtain the first solution;

[0050] (2) Make the thickener solution with a mass fraction of 2% with water according to the prescription ratio for use;

[0051] (3) Add pyraclostrobin in the proportion of the prescription and one-third of the antifoaming agent in the proportion of the prescription into the first solution and use a homogenizer to homo...

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Abstract

The invention provides a pyraclostrobin suspending agent and a preparation method thereof. The pyraclostrobin suspending agent comprises pyraclostrobin, a wetting dispersant, a thickener, an antifreezing agent, a defoamer, a synergistic aid, a grinding aid and water. According to the pyraclostrobin suspending agent, the particle sizes of the components in the suspension are ground to be smaller than or equal to 1 micron, the pesticide effect of the pyraclostrobin suspending agent can be improved, the unit area application amount of pyraclostrobin is effectively reduced, and pesticide resistance is avoided. Besides, the inventor screens proper wetting dispersant, synergistic assistant, thickener, grinding aid and proportion thereof to improve the stability of the suspension, so that the long-term stability of the suspension can be maintained even if the particle size of the components in the suspension is ground to be less than or equal to 1 mu m.

Description

technical field [0001] The invention belongs to the technical field of pesticides, and in particular relates to a pyraclostrobin suspension and a preparation method thereof. Background technique [0002] Pyraclostrobin, also known as pyraclostrobin, is a broad-spectrum methoxyacrylate methyl methoxyacrylate fungicide with a pyrazole structure discovered by BASF in 1993. Its mechanism of action is by inhibiting Mitochondrial respiration prevents mitochondria from producing and providing the energy needed for normal cell metabolism, eventually leading to cell death. It has the characteristics of permeability, local systemic activity, long-lasting effect, and resistance to rain erosion. It can prevent and control plant diseases caused by almost all types of fungal pathogens such as Ascomycetes, Basidiomycetes, Deuteromycetes and Oomycetes. At the same time, it is a hormone-type fungicide, which can make crops absorb more nitrogen and promote crop growth. Pyraclostrobin basical...

Claims

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Application Information

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IPC IPC(8): A01N47/24A01N25/04A01P3/00A01P21/00
CPCA01N25/04A01N47/24
Inventor 石伟贤谭葵王爱臣廖联安
Owner HUIZHOU YINNONG TECH
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