Difenoconazole water dispersion granules and preparation technique thereof

A technology of difenoconazole and dispersible granules, which is applied in the direction of biocide, fungicide, biocide, etc., can solve the problems of poor dispersibility, slow disintegration, poor stability, etc., and achieve good physical and chemical stability, Rapid disintegration, easy release and targeted effect

Inactive Publication Date: 2009-03-11
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are disadvantages such as poor stability, high cost, slow disintegration and poor dispersibility.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Preparation of Rosin Grafted Polymer Dispersant

[0037] In the there-necked flask, add 16.7 mass parts of maleopimaric acid chloride, 5.4 mass parts of hydroxyethyl methacrylate (HEMA), 3.2 mass parts of pyridine, 70 mass parts of toluene and a small amount of hydroquinone, pass N 2 Protect, heat to 100°C, and keep warm for 48 hours; after the reaction, wash with water 3 times, and then evaporate toluene under reduced pressure to obtain a rosin derivative (MPAHEMA).

[0038] 55 parts of deionized water, 1 part of chain transfer agent sodium bisulfite, and 15 parts of rosin derivatives (MPAHEMA) were added to the four-necked flask, and heated while stirring; when the temperature in the four-necked flask rose to 70 ° C, Add 21.6 parts of acrylic acid, 20 parts of sodium styrene sulfonate and 2.1 parts of initiator ammonium persulfate, and keep it warm for 3 hours; naturally cool to room temperature, and adjust the pH value to 7-8 with aqueous sodium hydroxide solution...

Embodiment 2

[0043] 1) Preparation of Rosin Grafted Polymer Dispersant

[0044] As described in Example 1.

[0045] 2) Preparation of difenoconazole water-dispersible granules

[0046] 11 parts of 95% difenoconazole, 6 parts of rosin grafted polymer dispersant, 7 parts of sodium naphthalene sulfonate, 7 parts of α-olefin sulfonate, 20 parts of ammonium sulfate, 43 parts of kaolin and 6 parts of white carbon Stir and mix the black powder evenly; dry pulverize to produce wettable powder; add wettable powder and 10 ml of water into the kneader at the same time and knead to make a plastic material; send this material to an extrusion granulator for granulation; Dry and sieve to obtain water-dispersible granules.

[0047] The suspension rate of the water-dispersible granules in water was 88.9%, and the disintegration time was 2 minutes.

Embodiment 3

[0049] 1) Preparation of Rosin Grafted Polymer Dispersant

[0050] As described in Example 1.

[0051] 2) Preparation of difenoconazole water-dispersible granules

[0052] 11 parts of 95% difenoconazole, 8 parts of rosin graft polymer dispersant, 10 parts of sodium naphthalene sulfonate, 4 parts of α-olefin sulfonate, 25 parts of ammonium sulfate, 40 parts of kaolin and 2 parts of white carbon Stir and mix the black powder evenly; dry pulverize to produce wettable powder; add wettable powder and 10 ml of water into the kneader at the same time and knead to make a plastic material; send this material to an extrusion granulator for granulation; Dry and sieve to obtain water-dispersible granules.

[0053] The suspension rate of the water-dispersible granules in water was 95.3%, and the disintegration time was 1.8 minutes.

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PUM

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Abstract

The invention discloses a difenoconazole water dispersible granule and a preparation technique thereof. The difenoconazole water dispersible granule is prepared by mixing the raw materials including 95% of difenoconazole, colophony graft polymer dispersant or acrylic polymer dispersant, naphthalene sulfonate, alpha-alkene sulfonate, ammonium sulphate, kaoline and white carbon black according to the proportion, and then the raw materials are ground in a dry way, granulated, dried and filtered. The water dispersible granule overcomes the harm of organic solvent in missible oil for the environment and the deficiencies of pulvis, so as to be easy to use, safe for the human beings and environment, and convenient to control the release and for orientation; as the used dispersant is multipolymer dispersant, the synergic action among radicals causes the dispersibility of the difenoconazole water dispersible granule to be superior to that of general micromolecule dispersant and homopolymer dispersant, so that the difenoconazole water dispersible granule prepared by the method has good dispersibility and rapid disintegration, and the suspension percentage in the water can reach 95.6%. In addition, the preparation technique has the advantages of simple operation, environmental protection and low cost, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a pesticide water-dispersible granule and a preparation process thereof, in particular to a difenoconazole water-dispersible granule and a preparation process thereof. Background technique [0002] Traditional pesticide formulations are mainly emulsifiable concentrates and powders. The emulsifiable concentrate is mainly formed by dissolving the original drug and a suitable emulsifier in an organic solvent such as toluene or xylene. During use, a large amount of organic solvent is sprayed on the land, which has caused a great impact on the ecological environment. Due to the use of a large amount of flammable and explosive organic solvents in the production process, there are many safety hazards in the production, storage and transportation of emulsifiable concentrate, which brings harm to the safety of people's lives and properties. Due to the small size of the powder, it is easy to drift, which will bring adverse effects to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/12A01N43/653A01P3/00
Inventor 任天瑞王利东陈龙
Owner SHANGHAI NORMAL UNIVERSITY
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