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Plural gel preparation for delaying release of herbicide and method of preparing the same

A composite gel and herbicide technology, applied in herbicides and algicides, botanical equipment and methods, biocides, etc., can solve the problems of reducing herbicide utilization efficiency, environmental pollution, etc., and reduce loss and leaching amount, reduction of environmental pollution, reduction of frequency and amount of effect

Inactive Publication Date: 2008-10-08
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing herbicides are mainly in traditional dosage forms such as emulsifiable concentrates. After being applied to plants or soil, most of the active ingredients of herbicides will be lost with surface runoff, or leached with the vertical movement of soil moisture, and enter the surface or groundwater system. on the other hand, it brings serious environmental pollution problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 3g of acidified bentonite and 4g of herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) into 100mL of water, stir well to form a uniform suspension, add 2g of sodium carboxymethylcellulose, and stir until carboxymethyl Sodium cellulose dissolves completely. Add 1mL of ferric nitrate (crosslinking agent) aqueous solution with a concentration of 25%, after mixing evenly, react at 40°C for 8h, then dry at 60°C for 1h, the contents of each component in the obtained composite gel preparation are respectively: Acidified bentonite 30.9%, carboxymethyl cellulose 20.6%, herbicide 40.2%, moisture 8.3%.

[0023] Then the composite gel formulation prepared is carried out release experiment, and sampling 0.2g is put into 1L water, and the herbicide quality of water sample analysis wherein is taken after interval certain hour, calculates the release rate of herbicide under different time (being released into the herbicide in water agent quality accounts for the percentage of origin...

Embodiment 2

[0025] Take 2 g of hydroxyaluminum pillared bentonite and 2.5 g of the herbicide acetochlor, add them to 100 mL of water, stir and mix to form a uniform suspension, add 2 g of sodium carboxymethyl cellulose, and stir until the sodium carboxymethyl cellulose is completely dissolved. Add 1mL of aluminum nitrate (crosslinking agent) aqueous solution with a concentration of 18%, mix well, react at 40°C for 6h, then dry at 60°C for 1.5h, the contents of each component in the obtained composite gel preparation are respectively : Hydroxy aluminum pillared bentonite 28.5%, carboxymethyl cellulose 28.5%, herbicide 34.3%, moisture 8.7%. The release experiment was carried out using the method described in Example 1 to obtain the release rates of herbicides at different times, and the results are shown in Table 1.

Embodiment 3

[0027] Take 4 g of hydroxyiron pillared bentonite and 4.5 g of the herbicide metolachlor, add them to 100 mL of water, stir and mix to form a uniform suspension, add 2 g of sodium carboxymethyl cellulose, and stir until the sodium carboxymethyl cellulose is completely dissolved. Add 1.8mL of glutaraldehyde (crosslinking agent) aqueous solution with a concentration of 30%, mix well, react at 60°C for 12h, then dry at 80°C for 2h, the contents of each component in the obtained composite gel preparation are respectively It is: hydroxy iron pillared bentonite 35.8%, carboxymethyl cellulose 18.3%, herbicide 40.3%, moisture 5.6%. The release experiment was carried out using the method described in Example 1 to obtain the release rates of herbicides at different times, and the results are shown in Table 1.

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PUM

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Abstract

The invention discloses a compound gel preparation used for deferring the release of weedicide, which is confected by the raw materials with the following weight percentage of 15 to 60 percent of modified bentonite, 10 to 50 percent of carboxymethyl cellulose, 15 to 60 percent of the weedicide and 0.1 to 15 percent of water. The invention also discloses a preparation method of the compound gel preparation used for deferring the release of the weedicide. The compound gel preparation of the invention has the advantages of being capable of deferring the release of the weedicide, reducing medicine dosage, prolonging action time, improving the utilization efficiency of the weedicide and relieving the pollution to the environment caused by the weedicide.

Description

technical field [0001] The invention relates to a composite gel preparation for delaying the release of herbicides and a preparation method thereof. Background technique [0002] Existing herbicides are mainly in traditional dosage forms such as emulsifiable concentrates. After being applied to plants or soil, most of the active ingredients of herbicides will be lost with surface runoff, or leached with the vertical movement of soil moisture, and enter the surface or groundwater system. On the other hand, it brings serious environmental pollution problems. Contents of the invention [0003] The purpose of the present invention is to provide a composite gel formulation that delays the release of herbicides and a preparation method thereof. The present invention has the functions of delaying the release of herbicides, reducing the amount of application, prolonging the action time, improving the utilization efficiency of herbicides, and reducing the risk of weeding. characte...

Claims

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Application Information

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IPC IPC(8): A01N25/08A01N25/10A01P13/00
Inventor 李建法李益民
Owner SHAOXING UNIVERSITY
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