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A kind of pyraclostrobin emulsion and preparation method thereof

A technology of pyraclostrobin and emulsion, which is applied in botany equipment and methods, fungicides, chemicals for biological control, etc., can solve problems such as inability to adapt to new needs, and achieve effective utilization and good Dispersion, high dispersion effect

Active Publication Date: 2022-04-19
GUIZHOU TOBACCO SCI RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Previous wettable powders and water-dispersible granules cannot meet new demands

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The first step, preparation of pyraclostrobin oil phase solution: after heating 10g of pyraclostrobin to 64°C and melting, dissolve in 10ml of mixed solvent (ethyl acetate: dimethyl carbonate: ethyl lactate) at a temperature of 10°C The volume ratio of the ester is 7:5:5), and the pyraclostrobin stock solution of 1g / ml is prepared;

[0028] The second step, preparation of gluten hydrolyzed suspension: add 2g of gluten to 10mL of 2% lactic acid aqueous solution (pH=3), hydrolyze in a water bath at 50°C for 1h, and obtain a gluten hydrolyzed suspension with a concentration of 200mg / ml. liquid;

[0029] The third step, preparation of pyraclostrobin emulsion: under 1500r / min mechanical stirring, slowly add 10ml of gluten hydrolyzed suspension, 20ml of glycerin, 2.5ml of dodecyl diacetate to 10ml of pyraclostrobin stock solution Methyl polyamine-diquaternary ammonium salt, 0.5g diatomaceous earth, obtain pyraclostrobin emulsion;

[0030] The fourth step, preparation of pyr...

Embodiment 2

[0032] The first step, preparation of pyraclostrobin oil phase solution: after heating 12.5g of pyraclostrobin to ℃ and melting, dissolve in 10ml of mixed solvent (ethyl acetate: dimethyl carbonate: ethyl lactate) at 20 ℃ The volume ratio of ester is 7:5:5), is mixed with the stock solution of pyraclostrobin of 1.25g / ml;

[0033] The second step, preparation of gluten hydrolyzed suspension: 20g of gluten was added to 10mL of 2% lactic acid aqueous solution (pH=3), hydrolyzed in a water bath at 62°C for 2h, and the gluten hydrolyzed suspension with a concentration of 200mg / ml was obtained. liquid;

[0034] The third step, preparation of pyraclostrobin emulsion: under 1500r / min mechanical stirring, slowly add 10ml of gluten hydrolyzed suspension, 20ml of glycerin, 2.5ml of dodecyl diacetate to 10ml of pyraclostrobin stock solution Methyl polyamine-diquaternary ammonium salt, 0.5g diatomaceous earth, obtain pyraclostrobin emulsion;

[0035] The 4th step, the preparation of pyra...

Embodiment 3

[0037] The first step, preparation of pyraclostrobin oil phase solution: heat 20g of pyraclostrobin to 70°C to melt, dissolve in 10ml of mixed solvent (ethyl acetate: dimethyl carbonate: ethyl lactate) at 25°C The volume ratio of ester is 7:5::5), is mixed with the stock solution of pyraclostrobin of 2.0g / ml;

[0038] The second step, preparation of gluten hydrolyzed suspension: 15g of gluten was added to 10mL of 2% lactic acid aqueous solution (pH=2.5), hydrolyzed in a 57°C water bath for 2h, and a gluten hydrolyzed suspension with a concentration of 150mg / ml was obtained ;

[0039] The third step, preparation of pyraclostrobin emulsion: under 1500r / min mechanical stirring, slowly add 10ml of gluten hydrolyzed suspension, 20ml of glycerin, 2.5ml of dodecyl diacetate to 10ml of pyraclostrobin stock solution Methyl polyamine-diquaternary ammonium salt, 0.5g diatomaceous earth, obtain pyraclostrobin emulsion;

[0040]The fourth step, preparation of pyraclostrobin emulsion: aft...

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Abstract

The present invention discloses a pyraclostrobin emulsion, comprising: pyraclostrobin oil phase solution and gluten hydrolysis suspension, wherein pyraclostrobin molecules are adsorbed around the gluten oligopeptide chain , pyraclostrobin molecules and gluten oligopeptide chains are cross-linked to form a network chain structure. The invention also discloses a method for preparing the pyraclostrobin emulsion. After the gluten is hydrolyzed, amino acids and polypeptides will be produced. Due to the electrostatic adsorption between the amino groups in amino acids and polypeptides and the ring structure in pyraclostrobin, pyraclostrobin molecules will be adsorbed on gluten oligopeptides around the chain, and pyraclostrobin molecules and gluten oligopeptide chains are cross-linked to form a network chain structure, so that the drug is evenly dispersed and combined more tightly, which can prolong the duration of action and improve the effectiveness of pyraclostrobin. utilization rate.

Description

technical field [0001] The invention relates to a pyraclostrobin emulsion and a preparation method thereof, belonging to the field of pyraclostrobin fungicides. Background technique [0002] Pyraclostrobin, also known as beclamin and pyraclostrobin, is a β-methoxyacrylate fungicide with triple effects of protection, treatment and eradication. It destroys the germs by inhibiting their respiration. Energy synthesis is one of the agricultural fungicides with the largest consumption and sales in the world. Pyraclostrobin has very low solubility in water (1.9g / L), is sensitive to light in aqueous solution, and is prone to photolytic failure during preparation and storage. The imported pyraclostrobin dosage form has better effect, but the cost is higher, so it is difficult to popularize and apply in tobacco agriculture. [0003] Wheat gluten is a natural protein extracted from wheat (flour). It has viscosity, elasticity, extensibility, film-forming properties and liposuction pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N47/24A01N25/04A01P3/00
CPCA01N47/24A01N25/04
Inventor 陈兴江柳永喻会平蔡翼杨熊晶罗玉英李长权刘杰马骏高贵
Owner GUIZHOU TOBACCO SCI RES INST
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