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Sustained-release chloroacetamide herbicide water-based suspension preparation and preparation method thereof

A chloroacetamide, water-based suspension technology, applied in the fields of botanical equipment and methods, biocides, animal repellents, etc., can solve the problems of complex preparation process of microcapsule suspension agent and insufficient sustained release properties, and achieve improved Safety and Environmental Compatibility, Contamination Inhibition, Efficacy in Reducing Loss or Leaching

Inactive Publication Date: 2015-04-22
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing aqueous emulsions and compound water-based suspensions have deficiencies in sustained release, and the preparation process of microcapsule suspensions is relatively complicated.

Method used

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  • Sustained-release chloroacetamide herbicide water-based suspension preparation and preparation method thereof
  • Sustained-release chloroacetamide herbicide water-based suspension preparation and preparation method thereof
  • Sustained-release chloroacetamide herbicide water-based suspension preparation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 6 g of cetyltrimethylammonium chloride, add it into 450 mL of twice distilled water, and stir until completely dissolved. Add 60 g of the original drug of metolachlor, and continue to stir for 2 h until a partial emulsion is formed. Add 20 g of bentonite, 10 g of sodium lignosulfonate, and 5 g of sodium carboxymethylcellulose accordingly, stir continuously for 5 h until the additives are evenly dissolved, adjust the pH to 7.0, and emulsify under high shear at a rotational speed of 10,000 rpm to obtain 540 g suspension formulation. The content of metolachlor in the preparation measured by high performance liquid chromatography was 10.5%. According to the national standard GB / T 14825-2006, the suspension rate of the preparation is 99.3%.

Embodiment 2

[0034] Weigh 6 g of octadecyltrimethylammonium bromide, add it into 400 mL of twice distilled water, and stir until completely dissolved. Add 50 g pretilachlor original drug, and stir continuously for 6 h until a partial emulsion is formed. Add 20 g of bentonite, 8 g of sodium methylene bis-naphthalene sulfonate, and 3 g of xanthan gum in sequence, stir continuously for 8 h until the additives are dissolved evenly, adjust the pH to 7.0, and high-shear emulsify at a speed of 12,000 rpm to obtain 475 g Suspension preparation. The content of pretilachlor in the preparation measured by high performance liquid chromatography is 9.8%. According to the national standard GB / T 14825-2006, the suspension rate of the preparation is 98.5%.

Embodiment 3

[0036] Weigh 5 g of cetyltrimethylammonium bromide, add it into 400 mL of twice distilled water, and stir until completely dissolved. Add 60 g of the original drug of acetochlor, and continue to stir for 3 h until a partial emulsion is formed. Add 16 g of bentonite, 10 g of sodium lignosulfonate, 2 g of xanthan gum, and 2 g of sodium alginate accordingly, and stir continuously for 12 h until the additives are dissolved evenly. Emulsified to obtain 485 g suspension preparation. The content of acetochlor in the preparation measured by high performance liquid chromatography was 11.5%. According to the national standard GB / T 14825-2006, the suspension rate of the preparation is 96.2%.

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Abstract

The invention belongs to the field of pesticide preparations, and discloses a herbicide water-based suspension preparation with slow-release performance and a preparation method thereof. The specific method is as follows: mixing a chloroacetamide herbicide with an aqueous solution of an alkyl quaternary ammonium salt cationic emulsifier , fully stirred or mixed until a partial emulsion is formed; then sequentially add bentonite, dispersant, and thickener, stir evenly, and finally obtain a herbicide suspension formulation through high-shear emulsification. The method of the invention has simple processing technology and safe operation, and the product has stable suspension and certain slow-release properties, which is beneficial to improving the utilization rate of the pesticide and reducing the pollution of the pesticide to the environment.

Description

technical field [0001] The invention belongs to the field of pesticide preparations, and in particular relates to a herbicide water-based suspension preparation with slow-release performance and a preparation method thereof. Background technique [0002] In order to improve the safety of pesticide use and control the adverse effects of pesticides on the ecological environment, new pesticide formulations represented by suspension concentrates and water-dispersible granules have developed rapidly in recent years. Among them, water-based pesticide suspension preparations have the following advantages: 1) Water-based suspensions are used as the dispersion medium, and organic solvents are basically not used. Compared with traditional formulations such as emulsifiable concentrates, water-based suspension preparations are easy to process, low in production costs, and good in environmental compatibility; 2. ) The water-based suspending agent can be directly mixed with water and spra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/04A01N25/30
Inventor 李建法李益民吕金红何继超何银峰
Owner SHAOXING UNIVERSITY