Natural pyrethrin water emulsion and its preparation

A technology of pyrethrin and water emulsion, which is applied in the fields of botany equipment and methods, biocides, animal repellents, etc., can solve the problem that it is difficult to balance insecticidal efficiency and formulation stability, weaken the environmental protection advantages of botanical pesticides, and pyrethrin formulations Development limitations and other issues, to achieve the effect of superior physical assisted insecticidal function, rapid pest range, and contact characteristics

Active Publication Date: 2007-06-27
YUNNAN NANBAO BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for a long time, due to the characteristics of easy decomposition of pyrethrum and water immiscibility of pyrethrum, the formulation development of pyrethrin has been restricted. For example, the Chinese patent with application number 01145597.7 discloses a kind of emulsifiable concentrate preparation of pyrethrin, which solves the problem of Solved the problem of formulation of pyrethrum raw materials in China, and then developed formulations such as powder, wettable powder, and microcapsules
But there are following problems in existing dosage forms: 1, there are organic solvents such as toluene, xylene to be equivalent in the emulsifiable concentrate, not only waste oil resource but also can cause the pollution of environment, and because the ignition point of solvent is low, flammable, in production, storage Restricted in terms of transportation and use
These hazards have weakened the environmental advantages of botanical pesticides, limiting their use in the field of high-end organic food insecticides
2. While the existing formulations solve the problem of pyrethrum formulations, it is difficult to take into account the insecticidal efficiency and the stability of the formulations, and the cost of use is high, which poses certain obstacles to large-scale promotion and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Prepare materials according to the following ratio:

[0051] Pyrethrin 1 part

[0052] Piperonyl Butyl Ether 5 parts

[0053] Sodium Alkyl Sulfonate 10 parts

[0054] 84 parts of water

[0055] After the following methods:

[0056] A. At 20°C, take 1 part of pyrethrin, add 3 parts of synergist piperonyl butoxide to it, stir and mix;

[0057] B. Add 10 parts of sodium alkyl sulfonate as an emulsifier to the above homogeneous mixture, and emulsify it for 30 minutes with a shear emulsifier at a speed of 800 revolutions per minute;

[0058] C. Add water to the above homogeneous mixture until the effective ingredient content of pyrethrin is 1.5%, and stir for 30 minutes at a stirring speed of 800 revolutions / min to obtain a pyrethrin aqueous emulsion.

Embodiment 2

[0060] Prepare materials according to the following ratio:

[0061] Pyrethrin 1 part

[0062] Sesamin 3 servings

[0063] 90 parts of sodium alkylamidosulfonate

[0064] 6 parts water

[0065] After the following methods:

[0066] A. At 25°C, take 1 part of pyrethrin, and add 3 parts of synergist sesamin to it, stir and mix well;

[0067] B. Add 90 parts of sodium alkylamidosulfonate as an emulsifier to the above homogeneous mixture, and emulsify with a shear emulsifier at a speed of 1000 revolutions / min for 10 minutes;

[0068] C. Add water to the above homogeneous mixture until the effective ingredient content of pyrethrin is 15%, and stir for 10 minutes at a stirring speed of 1000 revolutions / min to obtain a pyrethrin aqueous emulsion.

Embodiment 3

[0070] Prepare materials according to the following ratio:

[0071] Pyrethrin 1 part

[0072] 3 servings of peppermint oil

[0073] 70 parts of linear alkyl benzene sulfonate

[0074] 26 parts of water

[0075] After the following methods:

[0076] A. At a temperature of 23°C, take 1 part of pyrethrin, add 3 parts of synergist peppermint oil to it, stir and mix;

[0077] B. Add 70 parts of sodium linear alkyl benzene sulfonate as an emulsifier to the above homogeneous mixture, and emulsify for 20 minutes with a shear emulsifier at a speed of 900 revolutions per minute;

[0078] C. Add water to the above homogeneous mixture until the effective ingredient content of the pyrethrin is 8%, and stir for 20 minutes at a stirring speed of 900 rpm / min to obtain a pyrethrin aqueous emulsion.

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PUM

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Abstract

The pyrethrin water emulsion consists of pyrethrin 1 weight portions, synergist 1-30 weight portions, sodium benzene sulfonate 10-95 weight portions, and water 0-95 weight portions. It is water soluble, light stable and water stable. When used, it can form one air isolating layer in the surface of pest and has high pesticidal effect. It is used in killing pest in vegetable, fruit, flower, tea, Chinese medicine plant, etc. and may be also used for other purpose. It has high pesticidal effect, low residue and other advantages.

Description

Technical field [0001] The invention relates to a pyrethrum preparation, in particular to a pyrethrin water emulsion and a preparation method thereof. technical background [0002] The long-term application of chemical pesticides and fertilizers in agricultural production in my country, and the use of large amounts of organic nitrogen, organic phosphorus, and carbamate chemically synthesized pesticides, have caused large amounts of pesticide residues, resulting in pollution of soil, natural waters, and agricultural products, and more serious Pesticide residues directly endanger the health of humans and animals after being enriched in the food chain. In addition, excessive application of chemical pesticides can easily make pests resistant to pesticides, causing the use of pesticides to increase year by year, further aggravating the harm of chemically synthesized pesticides. Natural pyrethrin is a contact-killing plant-derived insecticide that inhibits nerve tissue and is derived f...

Claims

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Application Information

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IPC IPC(8): A01N53/02A01N25/02
Inventor 李定中
Owner YUNNAN NANBAO BIOTECH
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