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High-content water-dispersion granula and preparation method thereof

A technology of disperse particles and high content, applied in the fields of botanical equipment and methods, biocides, animal repellents, etc., can solve the problems of disintegration, dispersibility, suspension rate, quality index decline, easy particle agglomeration, and performance impact.

Inactive Publication Date: 2009-05-13
联合国南通农药剂型开发中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, after the existing water-dispersible granules are stored for a long time, due to the influence of external force backlog, high ambient temperature and other factors, a series of quality indicators such as disintegration, dispersibility and suspension rate are prone to decline.
The main reason is that particles are prone to agglomeration during the heat storage process, which affects its performance.

Method used

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  • High-content water-dispersion granula and preparation method thereof
  • High-content water-dispersion granula and preparation method thereof
  • High-content water-dispersion granula and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Firstly, the pulverized tebuconazole original drug (with particle size controlled at 5 μm to 15 μm) was mixed with NNO (naphthalene sulfonate formaldehyde condensate), sodium lignosulfonate, ZS-618 (EO / PO block polymer of Zhongshan Chemical Company) Ether), disintegrant ammonium sulfate, filler diatomaceous earth, silicone antifoaming agent are fully mixed, then add 10% of the total weight of the above mixture containing an aqueous solution containing binder polyvinyl alcohol PVA for kneading, and then through disc extrusion Press and granulate, then boil and dry to remove water, sieve, pack, and finally make the finished product.

[0040] The above-mentioned consumption (percentage weight, summation 100%) of each raw material except water is:

[0041]

Embodiment 2

[0043] First, the pulverized Diuron technical (particle size controlled at 2 μm to 15 μm) was mixed with wetting Tersperse 1004 (product of Huntsman Company), dispersant Tersperse 2700 (carboxylate product of Huntsman Company), Plutonic PE10500 (EO / PO block polyether), disintegrant urea, filler light calcium carbonate, low-carbon alcohol defoamer are fully mixed, then add the aqueous solution containing binder dextrin that accounts for 15% of the above-mentioned mixture gross weight and knead, and then After disc extrusion granulation, boiling drying, sieving, packaging, and finally the finished product.

[0044] The above-mentioned consumption (percentage weight, summation 100%) of each raw material except water is:

[0045]

Embodiment 3

[0047] First, mix the pulverized imidacloprid original drug (with a particle size of 2 μm to 10 μm) with K12 (sodium lauryl sulfate), sodium lignosulfonate, and dispersant DY-04 (polycarboxylates from Beijing Guangyuan Yinong Company) product), ZS-614 (EO / PO block polyether of Zhongshan Chemical Company), disintegrant ammonium sulfate, filler white carbon black, defoamer, silicone defoamer are fully mixed, and then add the total weight of the above mixture The 12% aqueous solution containing the binder polyethylene glycol PEG-600 is kneaded, then granulated by disc extrusion, then boiled, dried, sieved, packaged, and finally a finished product is obtained.

[0048] The above-mentioned consumption (percentage weight, summation 100%) of each raw material except water is:

[0049]

[0050] Main technical indicators of the present invention are as follows:

[0051]

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Abstract

The invention discloses a high-content water dispersible granule and preparation method thereof, comprising a bulk medicine, EO / PO auxiliary agent, moistening dispersant, disintegrating agent, binding agent, anti-foam agent, fillers or the like. The preparation method comprises: mixing the bulk medicine, EO / PO auxiliary agent, moistening dispersant, disintegrating agent, anti-foam agent, fillers, stabilizer and pH regulator; crushing the mixture into wettable powder; adding aqueous solution of binding agent into the mixture and kneading, regranulating, drying. The high-content water dispersible granule effectively solves the heat agglomeration problem and the EO / PO auxiliary agent effectively enwraps the bulk medicine particles and reduces the influence due to particles agglomeration. The decomposition rate of the high-content water dispersible granule is about 3.5% under the index requirement of 5% after storing for 14d at 54 plus or minus 2degree without easy disintegration and automatic dispersibility reduction phenomena.

Description

Technical field: [0001] The utility model relates to a pesticide dosage form. Background technique: [0002] Water-dispersible granules are one of the fastest-growing dosage forms in recent years. Water-dispersible granules are pesticide formulations that are dry, dust-free, free-flowing, and easy to diffuse in water. . Because of its good safety, no pollution to the environment, and the advantages of traditional pesticide formulations, it is considered to be an important direction for the development of pesticide formulations. Water-dispersible granules are mainly composed of active ingredients of pesticides, dispersants, wetting agents, binders, disintegrants and fillers. The particle size is 200μm-5mm. After entering water, they can quickly disintegrate and disperse to form a high-suspension dispersion system. Its main advantages are as follows: [0003] (1) There is no flying dust, which reduces the pollution to the environment, is safe for operators, and can make hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/14
Inventor 仲苏林章东生曹雄飞吴建兰曹新梅
Owner 联合国南通农药剂型开发中心
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