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Solid microemulsion comprising pyrethroid pesticide and preparation method of solid microemulsion

A technology of pyrethroid and solid microemulsion, which can be used in insecticides, botanical equipment and methods, acaricides, etc., can solve problems such as adverse effects on the ecological environment, and achieve excellent solubilization, environmental protection, safety and high efficiency. The effect of bioavailability

Active Publication Date: 2012-06-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of polar organic solvents (such as methanol, dimethylformamide, dimethylacetamide, dimethyl sulfoxide, N, N-dimethyl pyrrolidone etc.

Method used

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  • Solid microemulsion comprising pyrethroid pesticide and preparation method of solid microemulsion
  • Solid microemulsion comprising pyrethroid pesticide and preparation method of solid microemulsion
  • Solid microemulsion comprising pyrethroid pesticide and preparation method of solid microemulsion

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Experimental program
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Effect test

Embodiment 1

[0057] Embodiment 1, a kind of preparation method that contains the solid microemulsion of pyrethroid insecticide, carries out following steps successively:

[0058] 1), weigh raw materials:

[0059] 3.0% cypermethrin,

[0060] 0.8% octyl ether phosphate and 2.2% castor oil polyoxyethylene ether (60), as surfactant;

[0061] 1.0% sodium carboxymethyl starch, as a disintegrant;

[0062] 2.0% ammonium sulfate and sodium benzoate supplemented to 100%, as a carrier;

[0063] 2), put the above-mentioned cypermethrin and surfactant into a stirred tank, heat to 60°C, and stir evenly to obtain an oil phase;

[0064] 3), put the above-mentioned disintegrating agent and carrier into the mixer, and mix well to obtain a solid phase;

[0065] 4), the solid phase obtained in step 3) is gradually added to the oil phase obtained in step 2), and mixed uniformly to obtain a solid-oil mixture;

[0066] 5), adding 10% water of the total weight of raw materials into the above-mentioned solid-...

Embodiment 2

[0069] Embodiment 2, a kind of preparation method that contains the solid microemulsion of pyrethroid insecticide, carries out following steps successively:

[0070] 1), select raw materials:

[0071] 25% fenvalerate,

[0072] 1.3% calcium dodecylbenzene sulfonate, 2.5% isomeric alcohol polyoxyethylene polyoxypropylene ether, 1.5% lauryl imidazoline betaine, as surfactants;

[0073] Sodium benzoate supplemented to 100%, as a carrier;

[0074] 2), put the above-mentioned cis-cypermethrin and surfactant into a stirred tank, heat to 80°C and stir evenly to obtain an oil phase;

[0075] 3), adding sodium benzoate to the above-mentioned oil phase and stirring and mixing evenly to obtain a solid-oil mixture;

[0076] 4), the above-mentioned solid oil mixture is mechanically pulverized to obtain the finished product of 25% fenvalerate microemulsion powder.

Embodiment 3

[0077] Embodiment 3, a kind of preparation method that contains the solid microemulsion of pyrethroid insecticide, carries out following steps successively:

[0078] 1), select raw materials:

[0079] 8.0% flucyvalerate,

[0080] 3% polystyrene phenol polyoxyethylene ether, 4% propylene glycol polyoxyethylene polyoxypropylene block copolymer, as surfactant;

[0081] 10% sodium sulfate, 15% urea, 3% soluble starch and sodium benzoate supplemented to 100% as carrier;

[0082] 2), put the above-mentioned flucyvalerate and surfactant into the stirring tank, after stirring evenly, the oil phase is obtained;

[0083] 3), put the above-mentioned carrier into the mixer, and after fully mixing uniformly, a solid phase is obtained;

[0084] 4), the oil phase obtained in step 2) is gradually added to the solid phase obtained in step 3), and after uniform mixing, a solid-oil mixture is obtained;

[0085] 5), the above-mentioned solid-oil mixture is made into granules with an extrusion...

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Abstract

The invention discloses a solid microemulsion comprising pyrethroid pesticide and a preparation method of the solid microemulsion. The solid microemulsion comprises the following components by weight percent: 3-40% of active pharmaceutical ingredients of the pyrethroid pesticide, 3-20% of surfactant, 0-10% of organic solvent, 0-6% of disintegrant, 0-3% of binder and the balance of carrier. The invention further discloses a preparation method of the solid microemulsion comprising the pyrethroid pesticide. The biological activity of active ingredients of the solid microemulsion disclosed by the invention can be fully exerted, and the shelf life of the product can be prolonged. In addition, because the solid microemulsion does not adopt polar organic solvents, aromatic hydrocarbon organic solvents such as xylene and other chemical solvents or adopts a small amount of green vegetable oil ester solvents, the pollution of the chemical solvents to the environment can be avoided.

Description

technical field [0001] The invention relates to a solid microemulsion containing pyrethroid insecticide and a preparation method thereof. Background technique [0002] EC (emulsifiable concentrate, EC) is a traditional pesticide formulation in my country, accounting for about 50% of the total pesticides. At present, the production and use of EC preparations in my country is about 1 million tons per year, and the solvents used are mainly xylene and toluene. , benzene and other light aromatics consume about 300,000 tons of such solvents every year; in addition, polar solvents such as methanol and N,N-dimethylformamide are also used as co-solvents to a certain extent. Light aromatic hydrocarbon solvents represented by "triphenyl" and polar solvents such as methanol, N,N-dimethylformamide and ethylbenzene and naphthalene in common solvents have great hidden dangers to production safety, human health and ecological environment . Some of them have definite carcinogenic and terato...

Claims

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Application Information

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IPC IPC(8): A01N25/04A01N25/30A01N53/08A01N37/38A01N53/06A01P7/04A01P7/02
Inventor 魏方林朱国念魏晓林
Owner ZHEJIANG UNIV
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