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Metribuzin water dispersible granules and preparation method thereof

A technology of mezatrione and dispersible granules, applied in the field of pesticides, can solve the problems such as the patent report of mezatrione water dispersible granules, affecting crop yield, crop yield reduction, etc.

Active Publication Date: 2012-11-21
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 leafhopper, thrips, aphids, cutworms and many other pests. host, which seriously affects the yield of crops
[0007] At present, the dosage form of mecitrione in the market is mainly wettable powder, and there is no patent report of mecitrione water-dispersible granules

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 mesotrione, based on parts by weight, its raw material formula is composed of 70 parts of mesotrione original medicine, 5 parts of naphthalene sulfonate as wetting agent, 3 parts of polycarboxylate as dispersant, and stabilizer 2 parts of ethylenediaminetetraacetic acid and 20 parts of corn starch as filler. All raw material components are commercially available.

[0028] The mesotrione water dispersible granules are prepared by the following method:

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

[0030] (2) Weigh 70 parts of mesotrione technical after treatment with dilute hydrochloric acid, 5 parts of naphthalene sulfonate as wetting agent, 3 parts of polycarboxylate as dispersant, 2 parts of stabilizer ethylenediaminetetraacetic acid, and corn filler 20 parts of starch, fully mixed, the mixture is sequentially coarsel...

Embodiment 2

[0034] A water dispersible granule of mesotrione, based on parts by weight, its raw material formula is composed of 75 parts of mesotrione technical, 5 parts of naphthalene sulfonate as wetting agent, 3 parts of polycarboxylate as dispersant, and stabilizer 2 parts of disodium ethylenediaminetetraacetic acid, 15 parts of light calcium carbonate as filler. All raw material components are commercially available.

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

[0036] The technical indicators of the mesotrione water dispersible granules are as follows:

[0037] Suspension rate 94.1%; disintegration time≤60s; wetting time≤60s; moisture content≤2.5%; pH value 6.0~8.0; wet sieve test (passing 75μm test sieve) ≥98%; lasting foaming (after 1min)≤ 20ml; the suspension rate is ≥85% after heat storage at 54±2℃ for 30 days.

Embodiment 3

[0039] A water dispersible granule of mesotrione, in parts by weight, its raw material formula is composed of 80 parts of mesotrione technical, 3 parts of naphthalene sulfonate as wetting agent, 3 parts of polycarboxylate as dispersant, and stabilizer 2 parts of ethylenediaminetetraacetic acid and 12 parts of corn starch as filler.

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

[0041] The technical indicators of the mesotrione water dispersible granules are as follows:

[0042] Suspension rate 93.6%; disintegration time≤60s; wetting time≤60s; water content≤2.5%; pH value 6.0~8.0; wet sieve test (passing 75μm test sieve) ≥98%; lasting foaming (after 1min)≤ 20ml; the suspension rate is ≥85% after heat 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 anddrying 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, and in particular relates to a water dispersible granule of mesotrione and a preparation method thereof. Background technique [0002] Pesticide water dispersible granules are water-insoluble solid pesticide technicals, wetting agents, dispersants, other functional additives and fillers, after being thoroughly mixed, crushed into fine powdered solids, and then kneaded, granulated, dried and sieved The pesticide formulation formed by the partial operation can quickly disintegrate into the original particle size and disperse into a stable suspension in water. Water dispersible granules are not only solvent-free and dust-free, safe for operators, but also reduce environmental pollution. [0003] Mesotrione (4-amino-6-tert-butyl-4,5-dihydro-3-methylthio-1,2,4-triazine-5(4H)-one, MTB) is a selective herbicide Its effective ingredients are absorbed by the roots of weeds and conducted to the upper part by transpira...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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