Pendimethalin micro-capsule suspending agent and preparation method thereof

A pendimethalin microcapsule and pendimethalin technology, which is applied in the field of pesticides, can solve the problem of less varieties of pesticides, and achieve the effects of high market competitiveness, safe storage, transportation and use, and reduced toxicity

Inactive Publication Date: 2012-10-03
上海沪联生物药业(夏邑)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since many pesticides are difficult to add into microcapsule suspensions, there are very few types of pesticides in microcapsule suspensions.

Method used

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  • Pendimethalin micro-capsule suspending agent and preparation method thereof
  • Pendimethalin micro-capsule suspending agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: 10% pendimethalin microcapsule suspension

[0024] Synthesis of urea-formaldehyde resin prepolymer: Add urea, formaldehyde and deionized water into a three-necked flask equipped with a thermometer and a stirring device, the molar ratio of urea to formaldehyde is 1:1.5, adjust the pH to 8.5 with triethanolamine, and raise the temperature to 70 ℃, stirring at low speed for 1 hour to obtain a clear and transparent aqueous solution of urea-formaldehyde resin prepolymer;

[0025] Preparation of microcapsule suspension: Dissolve 10g of pendimethalin in 3.5g of xylene at room temperature, add 5g of the above-mentioned urea-formaldehyde resin prepolymer aqueous solution and 0.5g of polyvinyl alcohol while stirring, and dissolve at 1500 rpm Stir and react at high speed for 1 hour, after the oil-in-water emulsion is formed, reduce the speed to 800 rpm, add hydrochloric acid solution in 5 batches within 60 minutes to adjust the pH value of the system to 2.0, and afte...

Embodiment 2

[0026] Embodiment 2: 20% pendimethalin microcapsule suspension

[0027] Synthesis of urea-formaldehyde resin prepolymer: Add urea, formaldehyde and deionized water into a three-necked flask equipped with a thermometer and a stirring device, the molar ratio of urea to formaldehyde is 1:2.0, adjust the pH to 8.5 with triethanolamine, and raise the temperature to 70 ℃, stirring at low speed for 1 hour to obtain a clear and transparent aqueous solution of urea-formaldehyde resin prepolymer;

[0028] Preparation of microcapsule suspension: Dissolve 20 g of pendimethalin in 7 g of xylene at room temperature, add 10 g of the above-mentioned urea-formaldehyde resin prepolymer aqueous solution and 0.5 g of gelatin while stirring, and react with high-speed stirring at 1500 rpm 1h, after the oil-in-water emulsion is formed, reduce the speed to 800 rpm, add hydrochloric acid solution in 5 batches within 60 minutes to adjust the pH value of the system to 2.0, and after the polymerization r...

Embodiment 3

[0029] Embodiment 3: 30% pendimethalin microcapsule suspension

[0030] Synthesis of urea-formaldehyde resin prepolymer: Add urea, formaldehyde and deionized water into a three-necked flask equipped with a thermometer and a stirring device, the molar ratio of urea to formaldehyde is 1:2.0, adjust the pH to 8.5 with triethanolamine, and raise the temperature to 70 ℃, stirring at low speed for 1 hour to obtain a clear and transparent aqueous solution of urea-formaldehyde resin prepolymer;

[0031] Preparation of microcapsule suspension: Dissolve 30 g of pendimethalin in 15 g of xylene at room temperature, add 13 g of the above-mentioned urea-formaldehyde resin prepolymer aqueous solution and 0.7 g of polyvinyl alcohol while stirring, and use 1500 rev / min high-speed Stir and react for 1 hour. After the oil-in-water emulsion is formed, reduce the speed to 800 rpm. Add hydrochloric acid solution in 5 batches within 60 minutes to adjust the pH value of the system to 2.0. After 1 hou...

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Abstract

The invention relates to a pendimethalin micro-capsule suspending agent and a preparation method thereof. The pendimethalin micro-capsule suspending agent consists of pendimethalin, a capsule core solvent, a capsule wall material, a dispersant, a protective agent, an aqueous monomer and water; the pendimethalin is used as the capsule core and is covered with macromoleclar polymer to form a sustained-release and release-controlling preparation which can meet the basic prevention requirements of different target preparations; the preparation is low in toxicity and can be used for reducing the toxicity for beneficial organisms such as bees and silkworms; as the urea and formaldehyde are cheap and the microencapsulation process is simple and easy to control, the cost of the preparation is low and the market competitiveness of the preparation is strong; and water is used as a dispersing medium and dosage of an organic solvent is low, so that the preparation is safe in storage and use, and the environmental pollution is reduced. The pendimethalin micro-capsule suspending agent is dinitrotoluidine weedicide and is widely applied to weeding in fields of crops such as corn, soybean, peanut, cotton, directly sowing dry rice, potato, tobacco and vegetable.

Description

technical field [0001] The invention relates to a pendimethalin microcapsule suspension and a preparation method thereof, belonging to the technical field of pesticides. Background technique [0002] Pendimethalin molecular formula: C 13 h 19 N 3 o 4 , Chinese name: N-(1-ethylpropyl)-2,6-dinitro-3,4-dimethylaniline. [0003] [0004] Features: It mainly inhibits the division of meristem cells, and does not affect the germination of weed seeds, but works after the young shoots, stems and roots absorb the medicine during the germination process of weed seeds. Hypocotyl is the absorption part of dicotyledonous plants, and young shoots are the absorption part of monocotyledonous plants. The symptoms of damage are that young shoots and secondary roots are inhibited. Pendimethalin is a selective pre-emergence and post-emergence dryland soil treatment herbicide. Weeds absorb the chemical through the germinating shoots, and the chemical that enters the plant binds to tubuli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N33/18A01N25/28A01N25/04A01P13/00
Inventor 司贤良
Owner 上海沪联生物药业(夏邑)股份有限公司
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