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Water emulsion of hostathion and preparation method thereof

A technology of triazophos and water emulsion, applied in the field of insecticides and acaricides, can solve the problems of short shelf life, easy phase inversion, economic losses of manufacturers, etc., and achieve long shelf life, low environmental pollution, and cost reduction. Effect

Inactive Publication Date: 2007-05-16
ZHEJIANG XINNONG CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main formulation of triazophos currently circulating in domestic and international markets is still emulsifiable concentrate preparation, the content is mainly 20%, the amount of aromatic hydrocarbon solvent is very large, and the preparation is prone to crystallization, and the shelf life is short, which seriously affects the quality of the product. , can easily cause major economic losses to manufacturers
At the same time, the preparation content is low (≤20%), and the packaging cost and storage and transportation cost will increase
[0005] In order to develop triazophos into an emulsion in water, the problem of poor physical and chemical stability of the preparation must be solved. The higher the content of the active substance, the more difficult it is to formulate an O / W emulsion in water, and phase inversion is prone to occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0049] Triazophos 25.0%, castor oil polyoxyethylene ether 4.0%, polyoxyethylene (20) sorbitan monolaurate 1.0%, epoxidized soybean oil 1.0%, n-butanol 4.0%, xylene 6% Put it into a high-shear mixing emulsifier, and after mixing evenly, it becomes the oil phase. Add 2.0% ethylene glycol, 2.0% urea, 0.5% xanthan gum, 2.5% sodium carboxymethyl cellulose into the stirred tank, add deionized water to 100%, and stir evenly to form the water phase. Pump the water phase into the head tank, gradually add the water phase to the oil phase under high-speed shearing, and continue high-speed shearing for 10-60 minutes after the addition, to obtain 25% triazophos-water emulsion.

example 2

[0051] Triazophos 25.0%, castor oil polyoxyethylene (40) ether 1.0%, styrylphenyl polyoxyethylene ether 4.0%, calcium dodecylbenzenesulfonate 1.0%, epichlorohydrin 2.0%, isochlorohydrin Put 4.0% butanol and 5.0% xylene into the stirring tank, stir evenly to obtain the oil phase. Put 1.0% sodium naphthalenesulfonic acid condensate, 2.0% aluminum magnesium silicate, and 3.0% polyethylene glycol 400 into a high-shear mixing emulsifier, and shear to obtain an aqueous phase. Pump the oil phase into the head tank, gradually add the oil phase to the water phase under high-speed shearing, and continue shearing for 10-60 minutes after the addition, to obtain 25% triazophos-water emulsion.

example 3

[0053]Put 25.0% of triazophos, 3.0% of styrene phenol formaldehyde resin polyoxyethylene ether, 4.0% of polyoxyethylene nonylphenol ether, 1.0% of methyl propylene glycol, and 2.0% of phenyl glycidyl ether into the stirring tank, and after stirring After uniformity, the oil phase is obtained. Put 1% polymer polycarboxylic acid derivative, 1.5% polyvinyl alcohol, 2.0% propylene glycol, and deionized water into another stirred tank to make up to 100%. After stirring evenly, the water phase is obtained. tank, and under the condition of stirring, gradually add the water phase to the oil phase, and continue to stir for 10 minutes after the addition, to obtain a crude emulsion, which is transported to a high-pressure homogenizer, and after high-pressure homogenization, 25 % triazophos emulsion in water.

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Abstract

The invention discloses a triazophos aqueous emulsion and its preparing process, wherein the aqueous emulsion comprises 25-50% of triazophos, 5-15% of emulsifying agent, 1-4% of stabilizer, 0-10% of auxiliary solvent, 0-2% of dispersing agent, 0-3% of thickening agent, 0-4% of anti-freeze agent, and balancing water as dispersive medium. The emulsion is prepared through shearing emulsification or high-pressure homogeneity process and homogeneous decentralizing.

Description

Technical field: [0001] The invention relates to an insecticide and acaricide, in particular to an aqueous emulsion containing triazophos and a preparation method thereof. Background technique: [0002] Organic solvents in pesticide emulsifiable concentrates not only cause a waste of petroleum resources and increase production costs, but also pollute the environment and are harmful to pesticide applicators. In some countries, the use of emulsifiable concentrates containing aromatic hydrocarbon solvents has been restricted or banned, which has prompted Pesticide formulations are constantly updated and developed, among which water-based formulation is one of the leading directions for the development of pesticide formulations. [0003] Pesticide emulsion in water (Emulsion oil in water, EW) is the water-insoluble original drug liquid or the liquid obtained by dissolving the original drug in a water-insoluble organic solvent as the dispersed phase, with the aid of emulsifiers a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N57/16A01N25/02A01P7/00
Inventor 魏方林朱国念李俊戴金贵徐群辉
Owner ZHEJIANG XINNONG CHEM CO LTD
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