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Peparation of water dispersed soft particle of pesticide

A technology of soft granules and pesticide water, applied in botany equipment and methods, animal repellants, biocides, etc., can solve the problems of no packaging difficulties, low dust content, pollution, etc., and achieve small disintegration time and good The effect of mobility

Inactive Publication Date: 2005-10-12
馥稷生物科技发展(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The water dispersible granule involved in the present invention is also called dry suspension (dry flowable, DF) or grain type wettable powder (granule type wettable powder), is a kind of new pesticide developed by the U.S. and Europe in the early 1980s. Dosage form, the purpose is to solve the problems of dust pollution of powder and wettable powder, percutaneous toxicity of emulsifiable concentrate, and difficulty of dumping of suspension concentrate. It is characterized by good fluidity, low dust content, easy metering, and no packaging difficulties. Packaging such as bags (paper / aluminum / plastic) and cartons which are easy to handle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The preparation method of above-mentioned pesticide water dispersion soft granule comprises the following steps:

[0034] 1. Mix the botanical pesticide in the formula with the carrier of the water-insoluble substance and then ultrafinely pulverize it to 500 mesh to make a botanical pesticide mixture;

[0035] Or directly spray the extract of botanical pesticides on the carrier of water-insoluble substances that have been ultrafinely pulverized to 500 meshes to make plant pesticide adsorbents;

[0036] 2. Mix the chemical pesticide or the above-mentioned botanical pesticide mixture or plant pesticide adsorbate with the wetting agent and disintegrating agent in the formula to obtain the mixed material;

[0037] 3. In addition, heat the adhesive poloxamer to 60℃~70℃ to make it melt, add it to the mixture, stir for 10~20min under the condition of high-speed shear stirring, and the stirring speed is 500~800r / min, gradually After cooling to room temperature, the pesticide w...

Embodiment 1

[0039] Embodiment 1: 20g of toosendanin coarse powder (containing 2.5% of toosendanin) and 70g of carrier urea are mixed uniformly, and ultrafinely pulverized; after pulverization, mix with wetting agent sodium lauryl sulfate 5g, and additionally poloxane Heat 5 g of mol to 60°C. After the poloxamer is melted, add it to the mixture of toosendanin coarse powder, urea and sodium lauryl sulfate, and stir with a high-speed shearer for 20 minutes at a temperature of 60°C. The speed of the stirrer is 500r / min, 100g of 0.5% toosendanin water-dispersible soft granules can be prepared.

[0040] The determination methods of various quality indicators are as follows:

[0041] 1g of the prepared 0.5% toosendanin water-dispersible soft granules was added to 99g of 342ppm standard hard water at a temperature of 30°C. Within 2.5min, the granules could disperse automatically to form a uniform emulsion; The emulsion continued to stand at a temperature of 30°C for 1 hour. There was no floating...

Embodiment 2

[0044] Example 2: 10 g of ultrafine pulverized diflubenzuron (content 99%) and 40 g of potassium carbonate as a carrier, 32 g of bentonite as a disintegrating agent and 8 g of wetting agent Pingpingjia are uniformly mixed, preheated to 54 ° C, and added 10 g of poloxamer in a molten state at 65°C was stirred at 550 r / min for 10 min. 100 g of 10% diflubenzuron water-dispersible soft granules can be obtained.

[0045]Using the determination method of various quality indicators of the preparation in Example 1, the various indicators of the prepared 10% diflubenzuron water-dispersible soft granules were measured. The measurement results are: the dispersion time in water is 2.5min, the water dispersion stability and heat storage The stability is qualified, the suspension rate of diflubenzuron is 77%, and the thermal storage decomposition rate is 1.1%.

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Abstract

A water-dispersive soft particle of agricultural chemical is prepared from vegetative agricultural chemical or chemical pesticide, carrier, adhesive (poloxamer), wetting agent and disintegrant. Its advantages are high flow ability, dispersity and water affinity, good suspending nature, and high disintegrating speed.

Description

technical field [0001] The invention relates to the field of pesticide preparation processing, and relates to a method for preparing granular pesticides, in particular to a method for preparing pesticide dispersible soft particles. Background technique [0002] As people pay attention to the living environment, it is required to reduce the environmental pollution caused by the use of pesticide products. In order to meet this social requirement, in the development of pesticide products, while focusing on the development of new varieties of pesticides with low toxicity and high efficiency, higher requirements have been put forward for pesticide preparations, requiring the development of pesticide preparations in the direction of solidification and water-based, and gradually Replace emulsifiable concentrates and wettable powders with solid and water-based formulations. Contents of the invention [0003] The water dispersible granule involved in the present invention is also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/14A01N65/06A01N65/14A01N65/20A01N65/26
Inventor 罗延红李广泽潘立纲陈安良冯俊涛马志卿张兴
Owner 馥稷生物科技发展(上海)有限公司
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