Slow-release pesticide granule and preparation method thereof

A technology of slow-release granules and granules, applied in botany equipment and methods, insecticides, biocides, etc., can solve the problems of complex production of slow-release granules, high cost, and large quality differences, and achieve the goal of enhancing crop production. Effects of stress resistance, enhanced availability, and crop safety

Inactive Publication Date: 2017-10-20
山东大农药业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of complex production, large quality difference and high cost of the present sustained-release granules, the present invention provides a formulation of sustained-release pesticide granules coated with polymers. good effect

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 Preparation of 2% imidacloprid sustained-release granules

[0033] Consists of the following ingredients in weight percent:

[0034] Imidacloprid 2%

[0035] River sand 85%

[0036] Xanthan Gum 1%

[0037] Silica 1.7%

[0038] Urea 0.2%

[0039] Polyvinylpyrrolidone K30 1.5%

[0040] Ethylcellulose 20 8.3%

[0041] Allura Red 0.3%

[0042] Preparation method:

[0043] (1) Imidacloprid, river sand, xanthan gum, and white carbon black are prepared into granules according to a conventional adsorption method;

[0044] (2) Add a mixed solvent of toluene: ethanol with a volume ratio of 70:30 to the reactor, add urea, polyvinylpyrrolidone, ethyl cellulose, and allura red into the reactor and heat to 50°C, stir evenly to obtain 10% film formation liquid;

[0045] (3) Add the granules of step (1) into the drum of the coating machine, heat and rotate the drum at 10 rpm to preheat; after reaching 60°C, spray the slurry, the spray amount is 140kg / min; the spray ...

Embodiment 2

[0054] Example 2 Preparation of 10% Thiazophosphine Sustained Release Granules

[0055] Consists of the following ingredients in weight percent:

[0056] Thiazophosphine 10%

[0057] Sodium dodecylbenzenesulfonate 2%

[0058] Nonylphenol ethoxylate 8%

[0059] Silica 15%

[0060] Attapulgite 47.8%

[0061] Polyvinyl alcohol 2%

[0062] Polyglutamic acid 0.2%

[0063] Polyvinylpyrrolidone K60 1%

[0064] Macrogol 8000 0.5%

[0065] Ethylcellulose 10 13.3%

[0066] Rose Bengal 0.2%

[0067] Preparation method:

[0068] (1) Phosphine thiazole, sodium dodecylbenzenesulfonate, nonylphenol polyoxyethylene ether, white carbon black, attapulgite, and polyvinyl alcohol are prepared into granules according to a conventional extrusion granulation method;

[0069] (2) Add xylene: ethanol mixed solvent with a volume ratio of 80:20 to the reaction kettle, add polyglutamic acid, polyvinylpyrrolidone, polyethylene glycol, ethyl cellulose, rose red to the reaction kettle and heat to...

Embodiment 3

[0081] Embodiment 3 Preparation content, physicochemical property determination

[0082] 3.1 Determination of the active ingredient content of imidacloprid

[0083] The mass fraction of the active ingredient imidacloprid in 2% imidacloprid sustained-release granules was determined by high performance liquid chromatography. Use U.S. Agilent high performance liquid chromatograph, with acetonitrile: water (30:70) as mobile phase, flow rate 0.5mL / min, C 18 Column (250mm×4.6mm, 5μm), room temperature, injection volume 5μL, detection wavelength 260nm, imidacloprid retention time is about 4.3min.

[0084] The prepared granules were ultrasonically dissolved in the mobile phase and filtered, degassed and filtered, and then measured; the content of imidacloprid in the 2% imidacloprid sustained-release granules prepared in Example 1 was 2.08%, which was qualified.

[0085] 3.2 Determination of active ingredient content of thiazophosphine

[0086] The mass fraction of active ingredient...

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Abstract

The invention provides a slow-release pesticide granule and a preparation method thereof, which consists of active ingredient, slow-release coating and auxiliary materials. The slow-release coating consists of the following percentage contents of materials: 1 to 15 percent of water-soluble film-forming agent, 80 to 99 percent of insoluble film-forming agent and 0 to 5 percent of pore-foaming agent, and the slow-release coating accounts for 3 to 20 percent of the slow-release pesticide granule. The following method is adopted for preparation: raw granule is first prepared from the active ingredients and the auxiliary materials; the water-soluble film-forming agent, the insoluble film-forming agent and the pore-foaming agent are then dissolved into solvent, so that form-film solution is obtained; the raw granule is then put into the drum of a coating machine, and after spraying, coating and drying, the slow-release pesticide granule is obtained. The materials of the slow-release pesticide granule disclosed by the invention are easy to obtain, the process is simple, the slow-release pesticide granule is applicable to the preparation of a variety of pesticides, and the prepared product has a good slow-release effect, is safe to crops, and can be applied underground and on the ground to prevent and control harmful organisms.

Description

technical field [0001] The invention relates to a slow-release pesticide granule and a preparation method thereof, belonging to the field of pesticide processing. Background technique [0002] Pesticides are a special commodity, and most of their original drugs need to be processed into different dosage forms before they can be applied. Therefore, the study of pesticide formulations has always been an extremely important link in the development and application of pesticides. However, the utilization rate of conventional pesticide formulations is only 20-30%, and there are problems such as rapid release of active ingredients, short duration of drug effects, and serious ecological pollution. In order to solve these problems, people put forward higher scientific requirements for pesticide formulations. As an emerging technology, pesticide sustained release technology can effectively solve the problems of fast release rate and short effective action time of pesticide active pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/26A01N51/00A01N57/32A01N57/16A01N43/24A01N43/653A01N43/54A01P7/04A01P5/00A01P9/00A01P3/00
CPCA01N25/26A01N43/24A01N43/54A01N43/653A01N51/00A01N57/16A01N57/32A01N2300/00
Inventor 何峰韩继英滕振远
Owner 山东大农药业有限公司
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