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Pyraclostrobin and valifenalate compound aqueous suspension and preparation method thereof

A technology of pyraclostrobin and water suspension, which is applied in the field of compound water suspension of pyraclostrobin and valhexamin and its preparation, which can solve the problem that cooling water is difficult to take away the temperature of sand mill tank, pyrazole ether Low melting point of strobilurin, difficult to continue processing and other problems, to achieve the effect of reducing pesticide residues and environmental pollution, improving control effect, and improving drug efficacy

Inactive Publication Date: 2019-04-16
SHENZHEN NOPOSION AGROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The difficulty in developing pyraclostrobin and valistrobin into water suspensions mainly lies in the fact that pyraclostrobin has a low melting point, and it is difficult for the cooling water to take away the temperature accumulated in the center of the sanding tank when making water suspensions, resulting in When the local temperature rises, the original drug melts to form a larger combination, and finally the suspension appears lumpy or sticks to the wall, and then loses fluidity and is difficult to continue processing

Method used

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  • Pyraclostrobin and valifenalate compound aqueous suspension and preparation method thereof
  • Pyraclostrobin and valifenalate compound aqueous suspension and preparation method thereof
  • Pyraclostrobin and valifenalate compound aqueous suspension and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] A compound aqueous suspension of pyraclostrobin and valistrobin, comprising the following components by weight percentage: 40% of pyraclostrobin, 1% of valistrobin, 3% of polyacrylic acid polyether as a dispersant, and 3% of wetting agent Wet agent nonylphenol polyoxyethylene ether phosphate 2%, antifreeze agent ethylene glycol 4%, thickening and stabilizing agent xanthan gum 0.5%, absorbent filler compounded white carbon black 1%, defoaming agent organic silicone 0.4% %, preservative formaldehyde 0.1%, add water to make up to 100%.

[0032] The specific steps of the preparation method are as follows:

[0033] a. Put the weighed pyraclostrobin original drug, valihexamin original drug, dispersant, wetting agent, antifreeze agent, preservative, adsorptive filler and water into the stirring tank for shearing and mixing;

[0034] b. Under the condition of 20-30°C, pass the material sheared in step a into a sand mill for sand milling, add a weighed defoamer while grinding, ...

Embodiment 2

[0037] A compound aqueous suspension of pyraclostrobin and valistrobin, by weight percentage, comprising the following components: 40% pyraclostrobin, 2% valistrobin, dispersant alkylphenol polyoxyethylene ether formaldehyde Condensate 3%, wetting agent phenylethylphenol polyoxyethylene ether phosphate 3%, antifreeze agent propylene glycol 4%, thickener carboxymethyl cellulose 1%, absorbent filler compounded white carbon black 2%, disinfectant Foam agent ester-ether compound 0.4%, preservative sodium benzoate 0.1%, add water to make up to 100%.

[0038] The preparation method is the same as that of Preparation Example 1.

Embodiment 3

[0040] A compound aqueous suspension of pyraclostrobin and valistrobin, which comprises the following components by weight percentage: 40% of pyraclostrobin, 4% of valistrobin, 2.5% of dispersant polycarboxylate, cyclic Ethylene oxide propylene oxide block copolymer 4%, wetting and penetrating agent JFC 1.5%, antifreeze agent glycerol 4%, thickener polyacrylamide 1%, adsorbent filler compounded white carbon black 3%, disinfectant Foam agent organic silicone 0.4%, preservative potassium sorbate 0.1%, add water to make up to 100%.

[0041] The preparation method is the same as that of Preparation Example 1.

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Abstract

The invention discloses a pyraclostrobin and valifenalate compound aqueous suspension and a preparation method thereof. The aqueous suspension is prepared from, by weight, 1-40% of pyraclostrobin, 1-40% of valifenalate, 1-8% of a dispersing agent, 1-10% of a wetting agent, 0-1% of a thickening agent, 1-5% of adsorbable packing, 0-1% of a antifoaming agent, 0-1% of a preservative, 0.5-5% of an antifreezing agent and the balance water. The aqueous suspension is stable through heat storage or long-term storage, the problem that Ostwald ripening phenomenon occurs due to the enlargement of grain size caused by the heat storage or long-term storage of the aqueous suspension containing the pyraclostrobin, and the pyraclostrobin and valifenalate compound aqueous suspension is suitable for controlling venturia inaequalis and other diseases on crops.

Description

technical field [0001] The invention relates to a compound water suspension concentrate of pyraclostrobin and valhexamin and a preparation method thereof, belonging to the technical field of pesticide preparations. Background technique [0002] Pyraclostrobin belongs to the low melting point technical drug. From the perspective of the several publicly available crystal forms, the temperature span range is relatively large, between 40 and 67°C; the physical processing properties of each crystal form are not completely the same. , which brings certain difficulties to be processed into a suspending agent. The main manifestations are: easy flocculation and agglomeration, a large increase in the particle size of the suspension, rapid deterioration of the quality, melting of heat storage, and continuous control of low temperature by the low-temperature cooling circulation pump to process sanding. [0003] Valifenil, the English common name is valifenalate, and the chemical name i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N47/24A01N47/12A01N25/04A01P3/00
CPCA01N25/04A01N47/12A01N47/24
Inventor 刘磊邦曹欢袁伏中黄柯程廖科超洪俊逸陈贵兰
Owner SHENZHEN NOPOSION AGROCHEM
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