Slow-release pesticide and preparation method thereof

A slow-release, pesticide technology, applied in the field of pesticides, can solve the problems of difficulty in realizing slow-release pesticides and poor rain resistance, and achieve the effects of good rain resistance, low raw material cost, and good water resistance.

Active Publication Date: 2014-04-02
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the slow-release pesticide prepared by this method can be biodegradable and has no pollution to the environment, the rain resistance of this slow-release pesticide is poor, and it is difficult to achieve the purpose of slowly releasing pesticide under rainy weather conditions.

Method used

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  • Slow-release pesticide and preparation method thereof
  • Slow-release pesticide and preparation method thereof
  • Slow-release pesticide and preparation method thereof

Examples

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preparation example Construction

[0047] The invention provides a kind of preparation method of sustained-release pesticide, comprising the following steps:

[0048] a, mixing the starch-based surfactant with water to obtain the first mixed solution;

[0049] b. Mixing the hydrophobic pesticide agent, the mercapto compound and the oil phase to obtain a second mixed solution;

[0050] c. emulsifying after mixing the first mixed solution and the second mixed solution to obtain an oil-in-water emulsion;

[0051] d. performing a click reaction on the oil-in-water emulsion under photoinitiation to obtain a reaction product;

[0052] e, removing the oil phase and the water phase in the reaction product to obtain slow-release pesticides;

[0053] The steps a and b are not limited in time sequence.

[0054] In the present invention, the starch-based surfactant is mixed with the water phase to obtain a first mixed solution; preferably, the starch-based surfactant is dissolved in the water phase to obtain the first m...

Embodiment 1

[0071] Dissolve 100g of starch octenyl succinate with a degree of substitution of 0.05 in 1000g of water to obtain the first mixed solution;

[0072] 25g of 2,4-D pesticide and 3.37g of pentaerythritol tetramercaptoacetate were dissolved in 1000mL of dichloromethane to obtain a second mixed solution;

[0073] emulsifying the first mixed solution and the second mixed solution in an emulsifier for 3 minutes to obtain an oil-in-water emulsion, the rotational speed of the emulsifier is 12000 rpm, and the emulsification temperature is 10°C;

[0074]The above oil-in-water emulsion was irradiated under ultraviolet light for 10 minutes to perform a click reaction to obtain a reaction product, and the reaction temperature of the click reaction was 25°C;

[0075] The above reaction product is subjected to rotary steaming treatment at 30°C to remove the dichloromethane; the reaction product after the removal of dichloromethane is subjected to freeze-drying treatment to remove the water t...

Embodiment 2

[0079] 50g of starch dodecenyl succinate with a degree of substitution of 0.04 was dissolved in 1000g of water to obtain the first mixed solution;

[0080] The deltamethrin pesticide of 2.5g, the pentaerythritol dimercaptoglycol ester of 1.6g are dissolved in the benzene of 500mL, obtain the second mixed solution;

[0081] emulsifying the first mixed solution and the second mixed solution in an emulsifier for 2 minutes to obtain an oil-in-water emulsion, the rotation speed of the emulsifier is 13000 rpm, and the emulsification temperature is 25°C;

[0082] The above oil-in-water emulsion was irradiated under an ultraviolet lamp for 5 minutes to perform a click reaction to obtain a reaction product, and the reaction temperature of the click reaction was 50°C;

[0083] The above reaction product is subjected to rotary steaming treatment at 50° C. to remove benzene; the reaction product after removing benzene is subjected to freeze-drying treatment to remove water therein to obta...

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Abstract

The invention provides a slow-release pesticide, which comprises a hydrophobic pesticide agent and a starch-based capsule wrapping the hydrophobic pesticide agent, wherein the starch-based capsule is a reaction product of click reaction of a starch-based surface active agent and a sulfhydryl compound under photo initiation. According to the invention, click reaction of double bonds in the starch-based surface active agent and sulfydryl in the sulfhydryl compound is carried out, so that the starch-based surface active agent and the sulfhydryl compound are crosslinked for form formation so as to form the starch-based capsule; the starch-based capsule has a good water resisting property, so that the slow-release pesticide provided by the invention has a good rain resisting property; furthermore, the starch-based capsule provided by the invention can be degraded in the natural environment, so that the slow-release pesticide provided by the invention has an environment-friendly effect; in addition, the raw material cost of the starch-based capsule is low, and therefore, the slow-release pesticide provided by the invention is low in production cost.

Description

technical field [0001] The invention relates to the technical field of pesticides, in particular to a slow-release pesticide and a preparation method thereof. Background technique [0002] Pesticides can save 35% to 60% of the loss of agricultural production in my country every year, but due to the rapid release of pesticides, the utilization rate of pesticides after application is only 20% to 30%, and most of the active ingredients of pesticides remain in the environment. The duration of pesticide efficacy is shorter, causing the problem of excessive pesticide usage, and the toxicity of accumulated pesticide residues also brings great harm to the natural environment and human life. Therefore, the preparation of slow-release pesticides to control the release rate of active ingredients of pesticides and prolong the duration of pesticide effects is of great significance to agricultural production and ecological environment protection. [0003] The prior art discloses various t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/26B01J13/14A01N39/04A01N53/08A01N57/16A01P7/04
Inventor 谭颖梁学称敬翔刘亚东刘畅邓裕坤徐昆王丕新
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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