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Tolclofos emulsion and its preparation method

A technology of tolclofos-methyl and microemulsion, applied in botany equipment and methods, animal repellants, biocides, etc., can solve problems such as environmental pollution, large powder particle size, retention, etc., to reduce environmental pollution, The effect of reducing agricultural production costs and reducing the amount of application

Inactive Publication Date: 2004-05-05
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because tolclofos-methyl is an organic compound that is insoluble in water, the traditional products of tolclofos-methyl are all wettable powders or emulsifiable concentrates. The particle size of the powders is large, and the absorption rate of plants is low. , the retention is serious, causing environmental pollution; and the emulsifiable concentrate contains a large amount of toxic and harmful solvents such as toluene or xylene, which will cause great pollution to the human body and the environment when used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The formula is as follows:

[0031] Tolclofos-methyl 20%

[0032] Ethylene Oxide Propylene Oxide Copolymer 7%

[0033] Calcium dodecylbenzenesulfonate 6%

[0034] Cyclohexanone 6-8%

[0035] Ethylene glycol 4~6%

[0036] Sodium acetate 0.8~1.5%

[0037] water balance

[0038] Stir and emulsify the above-mentioned materials in an emulsification reactor at 40° C., and cool down when the solution becomes a uniform transparent liquid to obtain the tolclofos-methyl microemulsion of the present invention.

Embodiment 2

[0040] The product of Example 1 carries out the low-temperature stability test and the thermal stability test (carry out heat storage and cold storage test according to the pesticide test) at 0 ± 1 ° C and 54 ± 1 ° C respectively according to the method specified in the pesticide preparation standard. As a result, it is found that the product There is no oil / water phase separation and no solid precipitation, and the product meets the requirements of the stability test after testing.

Embodiment 3

[0042] Microemulsion of the present invention adopts the methyl use method of bibliographical reports such as " Pesticide Commodity Handbook " to carry out seed treatment dosage test, and its result is as follows:

[0043] Drug name

[0044] Drug name

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PUM

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Abstract

A nano-class tolclofos-methyl microemulsion is prepared from tolclofos-methyl 5-25 wt.%, non-ionic surfactant 5-15 wt.%, anionic surfactant 5-15 wt.%, solvent and water 10-30 wt.%. Its nanoparticles result in the great improvement of its properties. Its advantages are high chemical activity, fast absorption, strong target action, low dosage and low environmental pollution.

Description

technical field [0001] The invention relates to a plant protection agent, in particular to a microemulsion of a fungicide, more specifically to a microemulsion of tolclofos-methyl and a preparation method thereof. Background technique [0002] Tolclofos-methyl, common name: tolclofos-methyl (BSI, E-ISO, (m)F-ISO); chemical name: O-2,6-dichloro-p-tolyl O, O-dimethyl Phosphorothioate. The pure product is a colorless crystal, and the original drug is a colorless to light brown solid with a melting point of 78-80°C. This product is a phosphorus-containing fungicide, which has strong bactericidal activity against various pathogens such as Deuteromycetes, Basidiomycetes and Ascomycetes, and has good effects on seedling blight, sclerotinia, snow rot, etc. For example, it has special effects on the blight of cotton, potato, sugar beet and other plants. Due to its strong adsorption, it is not easy to be lost, and it has a certain duration in the soil. It can only be applied by see...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/04A01N57/14
Inventor 徐菁利陈思浩曹俭谷里鹏徐子成
Owner SHANGHAI UNIV OF ENG SCI
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