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Pesticide microcapsule granule and preparation method thereof

A technology of microcapsule granules and microcapsules, applied in botany equipment and methods, biocides, animal repellents, etc., can solve the problems of high cost of polyurethane and gelatin-gum arabic, low storage stability and suspension rate of suspensions , complex operation of the preparation method, etc., to achieve the effects of low cost, easy control of the process, and high content of active ingredients

Active Publication Date: 2010-02-17
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, microencapsulation technology has been applied to the processing of pesticide formulations, but the number of microencapsulated products is still quite limited, and the existing pesticide microcapsule preparations have the following problems: (1) The microcapsule wall material is generally urine aldehyde resin , polyurethane or gelatin-gum arabic, the degradation product of urea-formaldehyde resin has poisonous effect to environment, and polyurethane and gelatin-gum arabic cost are higher; (2) existing pesticide microcapsule preparation is mostly suspending agent, and the storage stability of suspending agent and the suspension rate is low, easy to layer and agglomerate, and this type of preparation contains a large amount of water, the content of active ingredients is low, and the storage solution in cold regions is limited; (3) the preparation method of the existing pesticide microcapsule preparation is complicated to operate, and the process difficult to control

Method used

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  • Pesticide microcapsule granule and preparation method thereof
  • Pesticide microcapsule granule and preparation method thereof
  • Pesticide microcapsule granule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Dissolving 8.0 parts by mass of chlorpyrifos in 2.0 parts by mass of xylene, then adding it to 100 parts by mass of 5.0% gelatin solution, and stirring at a speed of 1200 r / min for 20 minutes at 30-40° C. to form a uniform emulsion;

[0028] (2) Stir at a rotation speed of 600 rpm, add a mixed flocculant containing 15% sodium sulfate and 5% ammonium sulfate to the above emulsion, add 10 parts by mass every 5 minutes, and add 100 parts by mass in total. After the encapsulation, add 2.5 parts by mass of white carbon black, and continue to stir for 30 minutes. During the encapsulation process, n-butanol can be added dropwise as a defoamer for defoaming. Keep stirring and maintain the temperature at 30-40°C during the encapsulation process. Microcapsule particles with a diameter of about 60 μm can be obtained;

[0029] (3) Place the microcapsules in ice water for cooling, and stir at 150rpm until the microcapsules are completely condensed;

[0030] (4) Adding glutarald...

Embodiment 2

[0034] (1) Dissolve 3.0 parts by mass of deltamethrin in 4.0 parts by mass of cyclohexanone, 3.0 parts by mass of xylene and 0.5 parts by mass of acetone, then add it to 100 parts by mass of 5.0% gelatin solution, at 30-40°C Stir at a speed of 1200rpm for 20min to form a uniform emulsion;

[0035] (2) Stir at a rotation speed of 600 rpm, add a mixed flocculant containing 15% sodium sulfate and 5% ammonium sulfate to the above emulsion, add 10 parts by mass every 5 minutes, and add 100 parts by mass in total. After the encapsulation, add 2.5 parts by mass of white carbon black, and continue to stir for 30 minutes. During the encapsulation process, n-butanol can be added dropwise as a defoamer for defoaming. Keep stirring and maintain the temperature at 30-40°C during the encapsulation process. Microcapsule particles with a diameter of about 60 μm can be obtained;

[0036] (3) Place the microcapsules in ice water for cooling, and stir at 150rpm until the microcapsules are compl...

Embodiment 3

[0041] (1) 5.0 parts by mass of chlorpyrifos were dissolved in 5.0 parts by mass of isoamyl alcohol, then added to 100 parts by mass of 5.0% gelatin solution, and stirred at 30-40° C. for 20 minutes at a speed of 1200 rpm to form a uniform emulsion;

[0042] (2) Stir at a rotation speed of 600 rpm, add a mixed flocculant containing 15% sodium sulfate and 5% ammonium sulfate to the above emulsion, add 10 parts by mass every 5 minutes, and add 80 parts by mass in total. Then add 1.5 parts by mass of white carbon black, and then add 20 parts by mass of a mixed flocculant containing 15% sodium sulfate and 5% ammonium sulfate. After the encapsulation, add 1.5 parts by mass of white carbon black, and continue to stir for 30 minutes. During the encapsulation process, n-butanol can be added dropwise as a defoamer for defoaming. Keep stirring and maintain the temperature at 30-40°C during the entire process. Microcapsule particles with a diameter of about 60 μm can be obtained;

[004...

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Abstract

The invention discloses a pesticide microcapsule granule and a preparation method thereof. The preparation method of the microcapsule granule comprises the following steps: (1) dissolving pesticide; (2) emulsifying the dissolved pesticide by gelatin solution to form emulsion; (3) adding a flocculating agent into the emulsion to form a microcapsule; (4) after the microcapsule is formed, adding white carbon black into the microcapsule; (5) condensing, solidifying and depositing the microcapsule; and (6) carrying out drying processing on the microcapsule to obtain the microcapsule granule. The preparation method of the pesticide microcapsule granule has simple operation and can reduce the cost and the pollution to the environment, and the prepared pesticide microcapsule granule has the effect of slow release and prolongs the service life of medicines.

Description

technical field [0001] The invention relates to a preparation method of pesticide, in particular to a pesticide microcapsule granule and a preparation method thereof. Background technique [0002] China is the world's largest pesticide manufacturing and sales country, as well as a major pesticide exporter. However, the added value of export pesticides is low, and the international competitiveness is at a disadvantage. In order to improve the competitiveness of pesticide products, proceeding from the actual situation in our country, the more effective method is to give full play to the efficacy of existing pesticide varieties through the processing and improvement of pesticide formulations and formulas, so as to achieve both the sustainable development of agriculture and environmental protection. Balanced purpose. In addition, with the development of agriculture, the use of pesticides has increased and the area of ​​use has continued to expand. For general pesticide formula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/28A01N25/12
Inventor 廖铭炯郑思春刘琳冯启理
Owner SOUTH CHINA NORMAL UNIVERSITY
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