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Cyhalothrin water emulsion and method for preparing same

A technology of permethrin and water-emulsion, which is applied in the field of pesticides, can solve the problems of great influence on the stability of emulsion, obstacles to the popularization and application of water-emulsion, and high processing requirements, and achieve environmental protection, good fluidity, and high emulsification efficiency. Effect

Inactive Publication Date: 2010-08-04
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the processing requirements of water-in-emulsion are relatively high at present. For example, the active ingredients of water-in-emulsion are generally required to be below 30%. It should be 0.7-20 μm, and the ideal range is 1.5-3.5 μm; in addition, pesticides with high water solubility cannot be processed into water emulsions because they have a great impact on the stability of emulsions.
Therefore, the popularization and application of water-emulsion is still hindered to some extent at present.

Method used

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  • Cyhalothrin water emulsion and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1. The preparation of base material: the formula of base material is as shown in table 2. Diatomaceous earth was pre-dried at 140°C, and the mixture shown in the formula was ground on a colloid mill for 1 hour, and set aside.

[0046] Table 2. Base recipe

[0047]

[0048] 2. Put 21.6g of soybean oil into the cup, add 18g of kung fu permethrin, heat at low temperature (about 60°C) to dissolve into crude oil, stir well, then add the above base material, stir well, then add acrylic acid with a mass ratio of 3:1 Stir well with 38g of acrylate mixture and 4g of No. 26# white oil, then add 12g of lauric acid diethanolamide and stir well, then add 17.6g of soybean oil, stir well for later use.

[0049] 3. Add 18.8g of ethylene glycol, 6g of silicone defoamer, and 57g of distilled water to the above mixture, mix and dissolve evenly, and then grind on a colloid mill for 30 minutes to form a kaufthrin aqueous emulsion.

Embodiment 2

[0050] Embodiment 2 stability test

[0051] ① Dilute the Kung Fu permethrin aqueous emulsion prepared in Example 1 by 200 times with tap water, and after standing at room temperature for 1 hour, the emulsion has no precipitation and no stratification.

[0052] 2. Determining the Kung Fu permethrin aqueous emulsion prepared in Example 1, its cold storage (0 ± 2) ° C stability, 0 ° C, 7d after taking out, the emulsion is not delaminated, good fluidity, homogeneous emulsion.

[0053] ③ heat storage (54 ± 2) ° C stability of the Kung Fu permethrin water emulsion prepared in Example 1, after 14 days, no oil separation, no layering, good fluidity.

[0054] 4. The Kungfu permethrin water-emulsion prepared in Example 1 was stored alternately in cold and hot, and there was no precipitation, no stratification, and no oil separation.

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Abstract

The invention provides cyhalothrin water emulsion comprising the following components by mass percent: 8-10 percent of cyhalothrin, 8-15 percent of vegetable oil, 2-4 percent of lauric acid diethanolamide, 0.6-1.5 percent of mixture of acrylic acid and acrylic ester, 3-5 percent of diatomaceous earth and 2-4 percent of the low-HLB (hydrophile-lipophile balance) surfactant. According to the inverse suspended emulsion polymerization theory, the raw medicament is dissolved in the soybean oil so as to be suspended and emulsified directly to be more environmental friendly. The cyhalothrin water emulsion has good dispersity and high dilution stability, physical and chemical heat storage stability and cold storage stability.

Description

technical field [0001] The invention relates to the field of pesticides, in particular to a kaufthrin emulsion in water and a preparation method thereof. Background technique [0002] As people's awareness of environmental protection continues to strengthen, the regulations on pesticides are becoming more and more stringent, which requires not only excellent performance of pesticides, but also good environmental compatibility. At present, the most widely used pesticide dosage form is emulsifiable concentrate, but due to the large amount of organic solvents used in emulsifiable concentrate, pesticides become flammable and explosive dangerous goods, which adds a lot of unsafety to the production, packaging, storage, transportation and farmers' storage and use of pesticides. factors, and the cumulative harm caused by pesticide emulsifiable concentrates to the environment, ecology and food safety has become increasingly prominent. Therefore, water-based formulations such as wat...

Claims

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Application Information

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IPC IPC(8): A01N53/08A01N25/04
Inventor 张磊郑成毛桃嫣吴兵谢楷华
Owner GUANGZHOU UNIVERSITY
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