Dursban water emulsion without organic solvent and preparation method thereof

An organic solvent and chlorpyrifos technology, which is applied in the water emulsion field of broad-spectrum insecticide and acaricide chlorpyrifos, can solve the problems of large amount of surfactants, easy stratification, organic solvents are not completely replaced by water, etc., and achieve environmental protection benefits Obvious, water consumption increase effect

Active Publication Date: 2011-10-12
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the oil-water dispersion system of water emulsion has been studied as early as the early 19th century, water emulsion has not been used in conventional pesticide varieties so far because of its poor stability, easy delamination, and large amount of surfactant. There is less water emulsion, a new dosage form
Moreover, although the water-emulsion formulations currently on the market have been partially replaced by water or the organic solvent in the emulsifiable concentrate, the use of organic solvents in the water-emulsion formulations has not been completely replaced by water.

Method used

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  • Dursban water emulsion without organic solvent and preparation method thereof
  • Dursban water emulsion without organic solvent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Add 25g op-10 (emulsifier) ​​into the reaction kettle, then add 1500mL tap water, stir and heat up to 60°C, stir for 5 minutes to make it react and dissolve, add 4.1g potassium persulfate as polymerization initiator, stir well Add 180mL methyl acrylate and react at 60°C for 3h. Then add 135g of the original drug of chlorpyrifos, and add 10mL of antifreeze ethylene glycol at the same time, and continue to react for 3h. After the reaction is completed and cooled, 0.5 g of polymerization inhibitor p-benzoquinone is added, and it is poured into a container to obtain the required chlorpyrifos emulsion in water.

Embodiment 2

[0028] Add 80g of sodium dodecylbenzenesulfonate (emulsifier) ​​to the reaction kettle, then add 1300mL of tap water, stir to make it react and dissolve, add 12.5g of benzoyl peroxide as a polymerization initiator, add 900mL of benzene after stirring evenly Ethylene, reacted at 60°C for 3h. Then add 600g of chlorpyrifos and 60g of imidacloprid, and at the same time add 3g of initiator benzoyl peroxide and 150mL of styrene, and react for 4h. After the reaction is completed and cooled, add 2.5 g of stabilizer succinic acid, 3.5 g of polymerization inhibitor p-benzoquinone, and add 30 mL of antifreeze ethylene glycol at the same time, and pour it into a container to obtain the required organic solvent-free chlorpyrifos emulsion in water (Chlorpyrifos imidacloprid aqueous emulsion product).

Embodiment 3

[0030] Add 80g of polyoxyethylene lauryl ether (emulsifier) ​​into the reaction kettle, then add 1300mL of tap water, stir to make it react and dissolve, add 12.5g of azobisisobutyronitrile as a polymerization initiator, stir well and then add 900mL of methyl Methyl acrylate was reacted at 60°C for 3h. Then add 600g chlorpyrifos former medicine (add initiator azobisisobutyronitrile 3g, methyl methacrylate 150mL simultaneously, react 4h. After reaction finishes cooling, add stabilizer succinic acid 2.5g, polymerization inhibitor p-benzoquinone 2.5 g, add the antifreezing agent ethylene glycol of 30mL simultaneously, it is poured into the container and promptly obtains the required chlorpyrifos aqueous emulsion (product) that obtains without organic solvent.

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Abstract

The invention relates to water emulsion of a broad-spectrum insect and mite killing agent Dursban and a preparation method thereof. The Dursban water emulsion without an organic solvent is characterized by comprising the following raw materials in percentage by weight: 1 to 40 percent of Dursban, 1 to 40 percent of polymerized monomer, 0.1 to 5 percent of initiator, 1 to 20 percent of emulsifying agent, 0 to 10 percent of stabilizing agent, 0.1 to 5 percent of polymerization inhibitor, 0 to 8 percent of antifreezing agent, 0 to 5 percent of defoaming agent and the balance of water. In the Dursban water emulsion, the organic solvent is not adopted and the total using amount of the emulsifying agent is lower than that of the conventional Dursban water emulsion, so the Dursban water emulsion has low toxicity on human, livestock and beneficial organisms and remarkable environment-friendly benefit.

Description

technical field [0001] The invention relates to an emulsion in water of a broad-spectrum insecticide and acaricide chlorpyrifos 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 and other au...

Claims

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Application Information

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IPC IPC(8): A01N25/04A01N25/10A01N57/16A01N51/00A01P7/02A01P7/04A01P5/00
Inventor 马睿暴峰高洁侯玉帮沈凯燕陈涛王国珍
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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