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Chloroacetamide herbicide capsule suspension and production method thereof

A technology of microcapsule suspension and chloroacetamide, which is applied in the fields of herbicides and algicides, preparation of microspheres, botany equipment and methods, etc. It can solve the problems of affecting drug efficacy, difficulty in adapting to different crops and environments, and difficulty in recycling Use and other problems to achieve the effect of stable reaction process, convenient adjustment and easy control

Inactive Publication Date: 2019-05-07
JIANGSU ESSENCE AGROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are obvious defects in the existing preparation methods of chloroacetamide herbicide microcapsules: as disclosed in 20151101338.8 and 20151101330.1, polylactic acid is used as the wall material to prepare acetochlor and alachlor microcapsules respectively, but organic solvents are used in the formulations Dichloromethane is more difficult to recycle; patents 20141023493.5 and 20131037363.2 disclose the preparation method of chloroacetamide herbicide microcapsules, but the release rate of the microcapsules cannot be controlled; although the release rate can be adjusted in patents 20108001630.3 and 20118003968.6, it can To achieve the effect of improving safety and drug efficacy, but it only controls the release rate through the capsule material reaction process or particle size, and the crops are diverse and the environment is complex and changeable, so it is difficult to adapt to different crops and environments; especially for chloroacetamide As far as herbicides are concerned, they have high activity after soil treatment, and factors such as soil organic matter content, humidity, and clay content directly affect the migration speed of herbicides in the soil, thereby affecting the efficacy of the herbicide.

Method used

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  • Chloroacetamide herbicide capsule suspension and production method thereof
  • Chloroacetamide herbicide capsule suspension and production method thereof
  • Chloroacetamide herbicide capsule suspension and production method thereof

Examples

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preparation example Construction

[0123] A preparation method of the above-mentioned chloroacetamide herbicide microcapsule suspension, specifically comprising the following reaction steps:

[0124] (1) According to the above a kind of chloroacetamide herbicide suspending agent, take by weighing chloroacetamide herbicide, isocyanate, polyurethane soft segment, chain extender, surfactant, defoamer, antifreeze, preservative , thickener and water, spare;

[0125] (2) Prepare the dispersed phase: mix the chloroacetamide herbicide, isocyanate and polyurethane soft segment evenly to obtain the dispersed phase;

[0126] (3) Prepare the continuous phase: add the chain extender to water, stir evenly to prepare the continuous phase;

[0127] (4) Preparation of microcapsules: Put the dispersed phase and the continuous phase prepared above into the stirring tank respectively, and then use the injection pump to inject them according to the feed rate ratio of the dispersed phase and the continuous phase at 2:1-1:2 In the ...

Embodiment 1

[0133] A preparation method of acetochlor microcapsule suspension, specifically comprising the following reaction steps:

[0134] (1) Weigh 60g acetochlor, 2g toluene diisocyanate, 1.5g polyurethane soft segment PEG200, 1g chain extender CAED-900, 10g surfactant RH-208, 0.5g silicone defoamer, 5g glycerine Alcohol antifreeze agent, 2g Kathon preservative and 2g magnesium aluminum silicate thickener, and weigh the water of surplus by 100g total amount, standby;

[0135] (2) Prepare the dispersed phase: mix the above-mentioned weighed acetochlor, toluene diisocyanate, PEG200 evenly, and prepare the dispersed phase;

[0136] (3) Prepare the continuous phase: mix the above weighed chain extender CAED-900, silicone defoamer and water evenly to prepare the continuous phase;

[0137] (4) Preparation of microcapsules: the dispersed phase and the continuous phase prepared above are respectively loaded into a stirred tank, and the dispersed phase and the continuous phase are respective...

Embodiment 2

[0140] The 1.5 g polyurethane soft segment PEG200 used in the above-mentioned Example 1 was replaced with 5 g polyurethane soft segment PEG200, and other operating steps and technical parameters were the same as in Example 1.

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Abstract

The invention discloses chloroacetamide herbicide capsule suspension and a production method thereof. The produced hloroacetamide herbicide capsule suspension is stable in quality and controllable inrelease rate, and has quick release efficacy and slow release efficacy at the same time; and the production method is simple to operate, easy to control, high in production efficiency and short in production time.

Description

technical field [0001] The invention relates to the technical field of pesticide microcapsules, in particular to a chloroacetamide herbicide microcapsule suspension which is easy to adjust the release rate and a preparation method thereof. Background technique [0002] Chloroacetamide herbicides include alachlor, acetochlor, pretilachlor, butachlor, metolachlor, and metolachlor-sperm, all of which are oil-soluble liquids and are generally processed into emulsifiable concentrate formulations. Although it is simple to process into emulsifiable concentrate formulations, a large amount of organic solvents (xylene, 150# solvent oil, etc.) are used. The production process is safe and environmentally friendly. It is easy to cause organic solvent residues during use, which not only pollutes the environment, but also cause waste of resources. In addition, the newly developed water-emulsion and microemulsion dosage forms replace part of the organic solvent with water, but still need ...

Claims

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Application Information

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IPC IPC(8): A01N25/28A01N25/04A01N37/26A01N37/22A01N25/30A01P13/00B01J13/14
Inventor 周桂东朱光飞石伟山应万里范文娟王丹陆林华
Owner JIANGSU ESSENCE AGROCHEM
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