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Cyazofamid microcapsule suspending agent and preparation method thereof

A technology of microcapsule suspension and Cyazofamida, which is applied in the fields of botanical equipment and methods, biocides, fungicides, etc., can solve the problems of short duration, consumption of petrochemical resources, environmental pressure, etc., and achieve long duration, Good efficacy and stable performance

Active Publication Date: 2013-07-31
中高(天津)知识产权管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the duration of the current use of Cyazofamid to prevent and control bacteria is relatively short, which causes farmers to frequently use the drug and continuously increase the dosage of the drug, and many areas have caused the emergence of drug resistance. Therefore, prolonging the duration of the drug has become an urgent problem to be solved. topic
In addition, the dosage form currently used by Cyazofamido is still emulsifiable concentrate. Due to the use of a large amount of organic solvents, it not only consumes a large amount of petrochemical resources, but also causes great pressure on the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: 2% Cyazofamida Microcapsule Suspension Concentrate.

[0033] The preparation method of urea-formaldehyde resin prepolymer aqueous solution: dissolve urea into formaldehyde, the weight ratio of urea and formaldehyde is 1:1~1:2.5, adjust the pH value to 8 with sodium hydroxide, and stir at a low speed at 80°C , heat preservation reaction for 2 hours to generate a viscous and transparent urea-formaldehyde resin, add deionized water equal to the total weight of urea and formaldehyde, stir at a low speed, and obtain a transparent urea-formaldehyde resin prepolymer aqueous solution;

[0034] Dissolve 2% Cyazofamid in 5% xylene completely at room temperature, add 5% emulsifier castor oil polyoxyethylene ether and 20% water under stirring condition, and shear at 2000 rpm for 10-20 minutes into a stable O / W emulsion;

[0035] Reduce the shearing speed, add urea-formaldehyde resin prepolymer under stirring condition, then add dilute hydrochloric acid dropwise to adju...

Embodiment 2

[0038] Example 2: 8% Cyazofamida Microcapsule Suspension Concentrate.

[0039] Preparation method of urea-formaldehyde resin prepolymer aqueous solution: dissolve urea into formaldehyde, the weight ratio of urea and formaldehyde is 1:1~1:2.5, adjust the pH value to 8 with sodium hydroxide, stir at a low speed at 70°C , heat preservation reaction for 3 hours to generate a viscous and transparent urea-formaldehyde resin, add deionized water equal to the total weight of urea and formaldehyde, stir at a low speed, and obtain a transparent urea-formaldehyde resin prepolymer aqueous solution;

[0040] Dissolve 8% Cyazofamid in 15% xylene completely at room temperature, add 7% emulsifier styrene-based phenol polyoxyethylene ether and 20% water under stirring condition, and shear 10~ 20 minutes into a stable O / W emulsion;

[0041] Reduce the shearing speed, add urea-formaldehyde resin prepolymer under stirring conditions, then add dilute hydrochloric acid dropwise to adjust the pH ...

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PUM

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Abstract

The invention discloses a cyazofamid microcapsule suspending agent and a preparation method thereof. The cyazofamid microcapsule suspending agent comprises the following components by weight parts: 1-10 parts of cyazofamid, 3-20 parts of capsule-core solvent, 5-20 parts of wall material, 3-10 parts of emulsifying agent, 1-5 parts of dispersant and the balance of water. The invention also discloses a preparation method of the cyazofamid microcapsule suspending agent. The cyazofamid microcapsule suspending agent provided by the invention has the advantages of long duration time, low toxicity, environment friendliness, safety for human and livestock and is unlikely to generate drug resistance. The cyazofamid microcapsule suspending agent is stable in performance, easy to degrade, long in duration time for crop diseases and small in environment pollution. Compared with the prior art, the invention provides the more environment-friendly pesticide agent and meets the demand of agricultural pollution-free control.

Description

technical field [0001] The invention relates to an agricultural fungicide and a preparation method thereof, in particular to a cyazofamid microcapsule suspension and a preparation method thereof. Background technique [0002] Chemical control is an important means for humans to prevent and control agricultural and forestry diseases and insect pests. Chemical pesticides play a very important role in increasing agricultural production and income. and social issues. It is only due to the chemical pesticide itself, and to a large extent due to the unreasonable processing and application methods of the pesticide formulation. According to reports, the utilization rate of conventional pesticides is only 20% to 30%, while the loss rate through various channels is as high as 50% to 60%, which is not only a waste in economy, but also causes extensive environmental pollution. Therefore, it has become one of the future development directions of pesticide dosage forms to develop new do...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N43/50A01N25/04A01P3/00
Inventor 王龙江孟宪秋刘华金曹希敏袁彩斌
Owner 中高(天津)知识产权管理有限公司
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