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Metribuzin colloidal suspension and preparation method thereof

A technology of metrimetrione and colloidal suspensions, which is applied in the field of pesticides, can solve the problems of affecting crop yield, crop yield reduction, and unexplored metrimetrione colloidal suspensions, etc., to achieve improved suspension rate and stability, high absorption rate, The effect of prolonging the drug action time

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 metrizone in the market is mainly wettable powder, and no metrizone gel suspension has been seen yet.

Method used

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  • Metribuzin colloidal suspension and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A metrimetrione gel suspension, in parts by weight, its raw material formula consists of: 48 parts of metrimetrione technical, 1 part of emulsifier phenethylphenol polyoxyethylene ether, 5 parts of wetting and dispersing agent phosphate, Antifreeze ethylene glycol 5 parts, adhesive xanthan gum 0.1 part, thixotropic agent magnesium aluminum silicate 1 part, preservative benzoic acid 1 part, silicone defoamer 1 part, soft water 37.9 parts. The individual raw material components are commercially available.

[0033] The azimidone suspension is prepared according to the following steps:

[0034] (1) Take the commercially available mecitrione original drug, soak, wash and stir with 5% dilute hydrochloric acid, filter after mecitrione floats up, dry, and set aside;

[0035] (2), 0.1 part of adhesive xanthan gum was swollen with 4.9 parts of soft water for 24 hours, and set aside;

[0036] (3) According to the formula, take 1 part of emulsifier styrene-ethylphenol polyoxyethy...

Embodiment 2

[0040] A colloidal suspension of metrimetrione, in parts by weight, its raw material formula is composed of: 45 parts of metrimetrione technical material, 2 parts of emulsifier alkylphenol polyoxyethylene ether, 2 parts of wetting and dispersing agent naphthalenesulfonate , 5 parts of antifreeze ethylene glycol, 0.1 part of adhesive xanthan gum, 1 part of thixotropic agent magnesium aluminum silicate, 1 part of preservative benzoic acid, 1 part of silicone defoamer, 42.9 parts of soft water. The individual raw material components are commercially available.

[0041] The preparation method is the same as in Example 1.

[0042] The technical index of this azimidone suspension is as follows:

[0043] Suspension rate 95.5%; pH value 6.0-8.0; dispersion test: qualified; persistent foaming (after 1 min) ≤ 20ml; suspension rate ≥ 90% after heat storage at 54±2°C for 30 days.

Embodiment 3

[0045] A mecitrione gel suspension, in parts by weight, its raw material formula consists of: 40 parts of mecitrione technical, 1 part of emulsifier alkylphenol polyoxyethylene ether, 3 parts of wetting and dispersing agent phosphate, antifreeze 5 parts ethylene glycol, 0.1 part xanthan gum, 1 part magnesium aluminum silicate thixotropic agent, 1 part benzoic acid preservative, 1 part silicone defoamer, 47.9 parts soft water. The individual raw material components are commercially available.

[0046] The preparation method is the same as in Example 1.

[0047] The technical index of this azimidone suspension is as follows:

[0048] Suspension rate 97.6%; pH value 6.0-8.0; dispersion test: qualified; persistent foaming (after 1 min) ≤ 20ml; suspension rate ≥ 90% after heat storage at 54±2°C for 30 days.

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Abstract

The invention relates to metribuzin colloidal suspension and a preparation method thereof. The raw material formula of the metribuzin colloidal suspension comprises: 20 to 50 percent of metribuzin raw material medicament, 0.2 to 5 percent of emulsifier, 2 to 10 percent of wetting dispersant, 2 to 10 percent of antifreeze, 0.001 to 1 percent of adhesive, 0.005 to 5 percent of thixotropic agent, 0.005 to 1 percent of preservative, 0.005 to 1 percent of preservative, 0.1 to 5 percent of defoaming agent and 30 to 70 percent of soft water. In the invention, the raw material medicament is soaked inacid, washed, filtered and dried; and the components are weighed in a formula ratio, and the metribuzin colloidal suspension is prepared by shearing at high speed, sanding and filtering. The metribuzin colloidal suspension and the preparation method overcome the drawbacks of the conventional formulations of the metribuzin and reduce the use cost of farmer and environmental pollution. The metribuzin colloidal suspension has high suspension rate and long-lasting medicament effect, is convenient to store and transport, stable and easy to use and can be used for preventing and controlling xanthium sibiricum patrin, blite and green bristlegrass in potato fields.

Description

technical field [0001] The invention belongs to the field of pesticides, and in particular relates to a colloidal suspension with metrizone as an active ingredient and water as a dispersion medium and a preparation method thereof. Background technique [0002] Colloidal suspensions are also called suspensions and aqueous suspensions. The colloidal suspension uses water as the dispersion medium, without the flammability and phytotoxicity problems caused by organic solvents, without dust hazards, safe for operators and the environment, and the dispersibility and spreadability of the colloidal suspension are relatively good, and the suspension rate High, the ability to adhere to the surface of the plant is relatively strong, it is resistant to rain erosion, the drug effect time is relatively long, and it has the characteristics of low cost and high drug effect. [0003] Mecitrione (4-amino-6-tert-butyl-4,5-dihydro-3-methylthio-1,2,4-triazin-5(4H)-one, MTB) is a selective herbi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/04A01N43/707A01P13/02
Inventor 祁鸣杨盟余强崔华
Owner JIANGSU SEVENCONTINENT GREEN CHEM CO LTD
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