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Composite herbicide

A compound herbicide, a certain amount of technology, applied in the direction of herbicides, algicides, biocides, biocides, etc., can solve the problems of unavoidable direct contact, human health damage, etc., and achieve low degradation efficiency and accelerated degradation , the effect of rapid weeding

Inactive Publication Date: 2019-09-06
罗宏生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of composite herbicide, by using microporous starch as a loading group, then carry out carboxylation modification, and then make sulfasulfuron directly loaded on the microporous starch, then through polyethylene oxide and can The degradable polymer is mixed and coated, so that when the composite herbicide contacts the human body before application, the toxicity of the herbicide can be effectively isolated through the barrier of the outer composite film, which effectively solves the unavoidable problem of direct application of herbicides in the prior art. Direct contact with the human body, which is likely to cause certain harm to human health

Method used

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Effect test

Embodiment 1

[0017] The specific preparation process of the degradable polymer is as follows: Weigh 3.02kg of trimethylolpropane triglycidyl ether into 30mL of acetone, stir and mix evenly, add 1.47kg of glutamic acid to it, heat up to 50-60°C and stir to react 2-3h, and then filtered, washed and dried to obtain a degradable polymer.

Embodiment 2

[0019] A compound herbicide, the specific preparation process is as follows:

[0020] In the first step, 1 kg of cornstarch was weighed and added to 20 L of acetic acid solution with pH=5-5.5, after mixing and stirring evenly, 22 g of α-amylase was added thereto, stirred and reacted for 8-9 hours at room temperature, and then the pH of the reaction solution was adjusted to 10, Continue to stir and react for 5-10 minutes, filter and wash the product to neutrality and dry to obtain microporous starch;

[0021] In the second step, add 1kg of the microporous starch prepared in the first step into 5L of thionyl chloride solution, ultrasonically disperse for 30-40min, then add the dispersion into the reaction kettle, raise the temperature to 70-80°C and stir for 6-7h, Then filter, wash and dry to obtain the chlorinated starch base;

[0022] In the third step, add 1kg of the chlorinated starch base prepared in the second step into 10L of ether, and disperse ultrasonically for 30-40 ...

Embodiment 3

[0026]A compound herbicide, the specific preparation process is as follows:

[0027] In the first step, 1 kg of cornstarch was weighed and added to 20 L of acetic acid solution with pH=5-5.5, after mixing and stirring evenly, 22 g of α-amylase was added thereto, stirred and reacted for 8-9 hours at room temperature, and then the pH of the reaction solution was adjusted to 10, Continue to stir and react for 5-10 minutes, filter and wash the product to neutrality and dry to obtain microporous starch;

[0028] In the second step, add 1kg of the microporous starch prepared in the first step into 5L of thionyl chloride solution, ultrasonically disperse for 30-40min, then add the dispersion into the reaction kettle, raise the temperature to 70-80°C and stir for 6-7h, Then filter, wash and dry to obtain the chlorinated starch base;

[0029] In the third step, add 1kg of the chlorinated starch base prepared in the second step into 10L of ether, and disperse ultrasonically for 30-40 m...

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Abstract

The invention discloses a composite herbicide. The preparation process of the composite herbicide concretely comprises the following steps: weighing certain amounts of ethametsulfuron-methyl and an acetone solution, adding the ethametsulfuron-methyl and the acetone solution into a reaction kettle, stirring for dissolving, adding polycarboxy microporous starch, and performing stirring and reactingat normal temperature to obtain a starch-supported herbicide; and adding a mixed coating agent into a stirring kettle, heating the mixed coating agent to 90 DEG C, stirring for melting, adding the starch-supported herbicide to the mixed coating agent melt, carrying out ultrasonic dispersing at a kept temperature for 20-30 min, and performing filtering and cooling to obtain the composite herbicide.The microporous starch is used as a loading matrix, undergoes carboxylation modification to directly load the ethametsulfuron-methyl on the microporous starch, and then undergoes mixed coating usingpolyethylene oxide and a degradable polymer, so when the composite herbicide is contacted with the human body before being applied, the barrier of an outer composite membrane can effectively isolate the toxicity of the herbicide.

Description

technical field [0001] The invention belongs to the field of herbicide preparation and relates to a compound herbicide. Background technique [0002] Amsulfuron-methyl is a high-efficiency sulfonylurea herbicide, which is mainly used for weeding rape fields. Due to the high activity of sulfonylurea herbicides, long half-life and long residual time in the soil, it makes Other crops planted in the later period after rape harvest cause damage, so in the prior art, photodegradation is usually carried out by adding nano-titanium dioxide, but when sulfasulfuron is applied in the soil, it is difficult to be exposed to sunlight, which reduces its degradation efficiency , and all herbicides have certain toxicity. During the application process, they are usually directly seed-dressed or dissolved into a solution or dry powder application, which cannot avoid direct contact with the human body, and it is easy to cause certain damage to human health. Contents of the invention [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/10A01N47/36A01P13/00C08B31/00C12P19/14C12P19/04
CPCA01N25/10A01N47/36C08B31/00C12P19/04C12P19/14
Inventor 罗宏生
Owner 罗宏生
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