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Aqueous chlorpyrifos emulsion and preparation method therefor

A water emulsion, chlorpyrifos technology, applied in the fields of botanical equipment and methods, biocides, biocides, etc., can solve the problems of huge human and animal environmental damage, large use of organic solvents, and increased cost of emulsifiable concentrate preparations. Reduced storage and transportation costs, good emulsification effect, and the effect of ensuring chemical stability and physical stability

Inactive Publication Date: 2015-11-11
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional chlorpyrifos water-based emulsions generally use aromatic hydrocarbon solvents to dissolve the original drug. The amount of organic solvents used is very large, causing great harm to humans, animals and the environment. In recent years, with the continuous rise in the price of petroleum products, the cost of EC preparations is also gradually increasing, therefore, seeking new green and environmentally friendly solvents is a new direction for the development of pesticides

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The chlorpyrifos pesticide aqueous emulsion of the present embodiment, its formula is made up of the following components by weight percentage:

[0040] 97% chlorpyrifos technical 25%;

[0041] Epoxy fatty acid methyl ester 25%;

[0042] Span-802%;

[0043] Tween-805%;

[0044] Nonylphenol polyoxyethylene ether phosphate 1%;

[0045] Urea 1%;

[0046] Xanthan gum 0.15%;

[0047] remaining water.

[0048] In the above formula, the 97% chlorpyrifos technical drug, epoxy fatty acid methyl ester, Span-80, Tween-80, nonylphenol polyoxyethylene ether phosphate, urea and xanthan gum are all commercially available products.

[0049] The preparation method of above-mentioned a kind of chlorpyrifos pesticide aqueous emulsion adopts high-speed shear emulsification method, specifically comprises the following steps:

[0050] step 1

[0051] Preparation of oil phase: according to the recipe, first dissolve 97% of the original drug of chlorpyrifos with epoxy fatty acid methyl...

Embodiment 2

[0056] The chlorpyrifos pesticide aqueous emulsion of the present embodiment, its formula is made up of the following components by weight percentage:

[0057] 97% chlorpyrifos technical 35%;

[0058] Epoxy fatty acid methyl ester 15%;

[0059] Span-802%;

[0060] Tween-805%;

[0061] Nonylphenol polyoxyethylene ether phosphate 1%;

[0062] Urea 1%;

[0063] Xanthan gum 0.15%;

[0064] remaining water.

[0065] In the above formula, the 97% chlorpyrifos technical drug, epoxy fatty acid methyl ester, Span-80, Tween-80, nonylphenol polyoxyethylene ether phosphate, urea and xanthan gum are all commercially available products.

[0066] The preparation method of the above-mentioned chlorpyrifos pesticide aqueous emulsion adopts a high-speed shear emulsification method, which specifically includes the following steps:

[0067] step 1

[0068]Preparation of oil phase: according to the recipe, first dissolve 97% of the original drug of chlorpyrifos with epoxy fatty acid methyl...

Embodiment 3

[0073] The chlorpyrifos pesticide aqueous emulsion of the present embodiment, its formula is made up of the following components by weight percentage:

[0074] 97% chlorpyrifos technical 30%;

[0075] Epoxy fatty acid methyl ester 17%;

[0076] Span-802%;

[0077] Tween-805%;

[0078] Nonylphenol polyoxyethylene ether phosphate 1%;

[0079] Urea 1%;

[0080] Xanthan gum 0.15%;

[0081] remaining water.

[0082] In the above formula, the 97% chlorpyrifos technical drug, epoxy fatty acid methyl ester, Span-80, Tween-80, nonylphenol polyoxyethylene ether phosphate, urea and xanthan gum are all commercially available products.

[0083] The preparation method of the above-mentioned chlorpyrifos pesticide aqueous emulsion adopts a high-speed shear emulsification method, which specifically includes the following steps:

[0084] step 1

[0085] Preparation of oil phase: according to the recipe, first dissolve 97% of the original drug of chlorpyrifos with epoxy fatty acid methy...

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Abstract

The present invention discloses an aqueous chlorpyrifos emulsion and a preparation method therefor. The formula of the aqueous chlorpyrifos emulsion consists of the following components in percentage by weight: 25%-35% of a 97% chlorpyrifos technical, 15%-20% of epoxy fatty acid methyl ester, 8% of an emulsifier, 1% of urea, 0.15% of xanthan gum and a margin of water. According to the formula provided by the present invention, epoxy fatty acid methyl ester serves as a solvent, and Span-80, Tween-80 and phosphate polyoxyethylene nonyl phenol form an emulsifier according to the mass ratio being 2:5:1. The aqueous chlorpyrifos emulsion is not only excellent in formula stability, good in dispersibility and easy in degradation, but also low in toxicity, low in residue, and more environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of pesticide production, in particular to a chlorpyrifos pesticide emulsion in water and a preparation method thereof. Background technique [0002] Chlorpyrifos, chemical name: O,O-diethyl-O-(3,5,6-trichloro-2-pyridyl) phosphorothioate, molecular formula: C 9 h 11 Cl 3 NO 3 PS, white crystal, with slight mercaptan smell, non-systemic broad-spectrum insecticide and acaricide, highly volatile in the soil. [0003] Chlorpyrifos, as a bulk species to replace highly toxic pesticides, has been at the forefront of global pesticides for many years because of its broad insecticidal spectrum and lower toxicity than other organophosphorus pesticides. Conventional chlorpyrifos water-based emulsions generally use aromatic hydrocarbon solvents to dissolve the original drug, and the use of organic solvents is very large, causing great harm to humans, animals and the environment. Therefore, it is a new direction for t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N57/16A01N25/04A01N25/30A01P7/00
Inventor 郑成凌慧毛桃嫣江俊鸿
Owner GUANGZHOU UNIVERSITY
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