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Preparation method of slow-release pesticide

A technology for slow-release pesticides and pesticides, applied in the field of pesticides, can solve the problems of low preparation content and complicated process, and achieve the effects of maintaining stable release, prolonging release time, and improving slow-release performance

Active Publication Date: 2012-05-23
HENAN GOODDAYS BIOLOGY DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are problems such as complex process and low preparation content in the above two methods

Method used

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  • Preparation method of slow-release pesticide
  • Preparation method of slow-release pesticide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1 Preparation of Diazinon Sustained Release Tablets

[0016] Diazinon 5.0% (weight)

[0017] Silica 2.0% (weight)

[0018] Liquid paraffin 0.5% (weight)

[0019] Polyvinyl alcohol 5.0% (weight)

[0020] General Clay Top up

[0021] a) Slowly add 53g of 95% diazinon crude oil into 20g of white carbon black, stir and mix evenly after fully absorbing.

[0022] b) Slowly add 5 g of liquid paraffin into a) under constant stirring.

[0023] c) The product of step b), 872g of general clay and 50g of polyvinyl alcohol were uniformly mixed, an appropriate amount of water was added thereto, compressed into tablets with a tablet machine, and then dried.

[0024] A 5.0% diazinon sustained-release tablet was obtained.

Embodiment 2

[0025] Example 2 Preparation of trichlorfon and chlorpyrifos sustained-release granules

[0026] Trichlorfon 3.0% (weight)

[0027] Chlorpyrifos 1.5% (weight)

[0028] DMF 1.0% (weight)

[0029] Octadecyltrimethylammonium bromide 1.0% (weight)

[0030] Zeolite 10.0% (weight)

[0031] Polyethylene glycol 1.0% (weight)

[0032] Yellow dextrin 10.0% (weight)

[0033] General Clay Top up

[0034] a) Add 34 g of 90% trichlorfon powder, 16 g of 95% chlorpyrifos powder and 10 g of octadecyltrimethylammonium bromide into 10 g of DMF, and stir to fully dissolve it.

[0035] b) Fully adsorb a) with 100 g of zeolite.

[0036] c) Add 10 g of polyethylene glycol to b).

[0037] d) Mix the product of step c), 100g of yellow dextrin and 720g of general clay powder, add an appropriate amount of water therein, mix with a small kneader, and granulate the obtained mixture with a small extrusion granulator, Dry and sieve after machine sizing.

[0038] A 4.5% trichlorfon·chlorpyrifos sus...

Embodiment 3

[0039] Example 3 Preparation of propiconazole sustained-release granules

[0040] Propiconazole 1.0% (weight)

[0041] Cetyltrimethylammonium bromide 0.5% (weight)

[0042] Silica 1.0% (weight)

[0043] Engine oil 0.5% (weight)

[0044] Sodium carboxymethyl cellulose 5.0% (weight)

[0045] General Clay Top up

[0046] a) Add 5 g of cetyltrimethylammonium bromide into 11 g of 95% propiconazole crude oil, stir and mix evenly, and then use 10 g of white carbon black to adsorb it.

[0047] b) Add 5g of engine oil to a).

[0048] c) The product of step b), 919g of general clay and 50g of sodium carboxymethylcellulose were mixed and then granulated, dried and sieved.

[0049] 1% propiconazole sustained-release granules were obtained.

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Abstract

The invention relates to a preparation method of a slow-release pesticide. The method comprises the steps of: adsorbing a pesticidal active compound into a porous material; using a pore channel sealing material to seal the pore channels of a porous carrier; conducting further processing so as to obtain a suspending agent, powder, a granule, a tablet and other products of different preparation forms. The pesticidal active compound can be a pesticide, a bactericide, a herbicide or a plant-growth regulator. The preparation method of a slow-release pesticide in the invention can be used to prepare slow-release powder, slow-release granules, slow-release tablets, slow-release suspending agents and other products of different preparation forms so as to meet different demands of agricultural production, and can control the release of pesticidal active components into a surrounding environment at a predetermined speed or a low speed within a predetermined time. One-time application of a slow release pesticide prepared in the invention can control diseases, pests and weeds of a whole growth period (or a certain period). Thus, the slow-release performance of pesticides can be substantially enhanced, the release time can be prolonged, and long-time stable release of slow release pesticides can be maintained.

Description

technical field [0001] The invention relates to the field of pesticides, in particular to a new method for preparing slow-release pesticides. Background technique [0002] According to the release characteristics of pesticide active ingredients, pesticide formulations can be divided into two categories: free-release conventional pesticides and controlled-release pesticides. The effective utilization rate of conventional pesticides is only 20% to 30%, while the loss rate is as high as 50% to 60%! This is not only economically wasteful, but what is more serious is that the lost pesticides will not only flow into rivers, lakes and seas, but also pollute groundwater sources through seepage. Long-term residual pesticides will also enter plants, and even enter the human body through the food chain. It poses a serious threat to human health and the ecological environment. For this reason, the extensive use of pesticides has aroused widespread vigilance and concern. [0003] Pest...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/08A01N25/10A01N25/02A01N57/16A01N57/20A01N43/653A01N43/70A01N51/00A01N47/02A01P7/00A01P3/00A01P13/00A01P5/00
Inventor 王淑徐玉龙
Owner HENAN GOODDAYS BIOLOGY DEV CO LTD
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