Metribuzin water dispersible granules and preparation method thereof

A technology of mezotrione and dispersible granules, applied in the field of pesticides, can solve the problems of crop yield reduction, no patent report on mezotrione water dispersible granules, affecting crop yield, etc.

Active Publication Date: 2011-01-26
JIANGSU SEVENCONTINENT GREEN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is one of the main weeds that harm potato fields. When it occurs seriously, it can form a dominant population and densely cover the field. The competition for fertilizer and water is strong, resulting in crop yield reduction. Foxtail grass is also a leafhop

Method used

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  • Metribuzin water dispersible granules and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A water-dispersible granule of mecitrione, in parts by weight, its raw material formula consists of: 70 parts of mecitrione technical, 5 parts of naphthalenesulfonate as a wetting agent, 3 parts of polycarboxylate as a dispersant, and a stabilizer 2 parts of ethylenediamine tetraacetic acid, 20 parts of filler corn starch. The individual raw material components are commercially available.

[0028] The water-dispersible granule of mecitrione is prepared by the following method:

[0029] (1) Take the commercially available mecitrione technical substance, soak, wash and stir with 5% dilute hydrochloric acid, filter and dry it after it floats up, and set it aside for use.

[0030] (2), weighing 70 parts of the original drug of metrizone after dilute hydrochloric acid treatment, 5 parts of wetting agent naphthalene sulfonate, 3 parts of dispersant polycarboxylate, 2 parts of stabilizer ethylenediaminetetraacetic acid, filler corn 20 parts of starch, fully mixed, the mixed ...

Embodiment 2

[0034] A water-dispersible granule of mecitrione, in parts by weight, its raw material formula is composed of: 75 parts of the original medicine of mecitrione, 5 parts of naphthalenesulfonate as a wetting agent, 3 parts of polycarboxylate as a dispersant, and 3 parts of a stabilizer 2 parts of disodium edetate, 15 parts of filler light calcium carbonate. The individual raw material components are commercially available.

[0035] The preparation method is the same as in Example 1.

[0036] The technical indicators of the mecitrione water-dispersible granule are as follows:

[0037] Suspension rate 94.1%; disintegration time ≤ 60s; wetting time ≤ 60s; moisture ≤ 2.5%; pH value 6.0-8.0; wet sieve test (through 75μm test sieve) ≥ 98%; persistent foaming (after 1min) ≤ 20ml; Suspension rate ≥85% after thermal storage at 54±2℃ for 30 days.

Embodiment 3

[0039] A water-dispersible granule of mecitrione, in parts by weight, its raw material formula consists of: 80 parts of mecitrione technical, 3 parts of naphthalenesulfonate as a wetting agent, 3 parts of polycarboxylate as a dispersant, and a stabilizer 2 parts of ethylenediamine tetraacetic acid, 12 parts of filler corn starch.

[0040] The preparation method is the same as in Example 1.

[0041] The technical indicators of the mecitrione water-dispersible granule are as follows:

[0042] Suspension rate 93.6%; disintegration time ≤ 60s; wetting time ≤ 60s; moisture ≤ 2.5%; pH value 6.0-8.0; wet sieve test (through 75μm test sieve) ≥ 98%; persistent foaming (after 1min) ≤ 20ml; Suspension rate ≥85% after thermal storage at 54±2℃ for 30 days.

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Abstract

The invention relates to metribuzin water dispersible granules and a preparation method thereof. The metribuzin water dispersible granules are regular or irregular granules, of which the formula comprises the following raw materials in percentage by weight: 50 to 80 percent of crude metribuzin, 2 to 10 percent of humectant, 2 to 10 percent of dispersing agent, 1 to 5 percent of stabilizing agent and 10 to 40 percent of stuffing. The preparation method for the metribuzin water dispersible granules comprises the following steps of: soaking raw medicinal materials in acid, washing, filtering and drying the raw medicinal materials, weighing the raw medicinal materials according to proportion, blending and roughly crushing the raw medicinal materials, blending and roughly crushing the raw medicinal materials again, sieving the raw medicinal materials to obtain fine powder, adding water into the fine powder, pelleting the fine powder and drying the granules to obtain the metribuzin water dispersible granules. The metribuzin water dispersible granules overcome the defects of the traditional metribuzin formulations, reduce the using cost of farmers and environmental pollution, have the advantages of high active material content, high suspension rate, low pollution, convenient storage and transportation, high stability, easy use, high disintegrating speed and good dispersibility and fluidity, and is applicable to prevention and control of amaranthus retroflexus, goosefoots and siberian cocklebur in alfalfa field.

Description

technical field [0001] The invention belongs to the field of pesticides, in particular to a water-dispersible granule of mecitrione and a preparation method thereof. Background technique [0002] Pesticide water dispersible granules are water-insoluble solid pesticide raw materials, wetting agents, dispersants, other functional additives and fillers, which are thoroughly mixed, pulverized into fine powder solids, and then kneaded, granulated, dried, sieved The pesticide dosage form formed by the operation of parts and the like can be rapidly disintegrated into the original particle size in water and dispersed into a stable suspension. Water-dispersible granules are not only solvent-free and dust-free, safe for operators, but also reduce environmental pollution. [0003] Mecitrione (4-amino-6-tert-butyl-4,5-dihydro-3-methylthio-1,2,4-triazin-5(4H)-one, MTB) is a selective herbicide , its active ingredients are absorbed by the roots of weeds and conducted to the upper part o...

Claims

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Application Information

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IPC IPC(8): A01N25/14A01N43/707A01P13/02
Inventor 祁鸣杨盟谷文喆
Owner JIANGSU SEVENCONTINENT GREEN CHEM CO LTD
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