High-efficient agricultural chemicals suspension agent and disperser and method for preparing the same

A technology of dispersant and suspending agent, which is applied in the field of polymer dispersant and its preparation, and can solve the problems of dependence on imports and high cost

Active Publication Date: 2008-03-05
江苏钟山新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Foreign countries have made a lot of achievements in the development of suspending agent and dispersant, and many products have come out one after another. However, domestic countries are far behind foreign countries in this regard, almost relying on imports, and the cost is relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 48.3g MA-1 and 35.9g methyl ethyl ketone into a four-necked flask equipped with a stirrer, dropping funnel, thermometer and condenser, stir and raise the temperature to 60℃, and then add 8.6g MB-2 and 5g MC dropwise at the same time. -1. A monomer solution of 13.6 g of butanone and an initiator solution mixed with 0.62 g of azobisisobutyronitrile and 12.4 g of butanone, the dropping time is controlled within 2 hours, and the reaction temperature is 58-62°C. After the dropwise addition of the monomer solution and the initiator solution is completed, the temperature is increased to 80°C, and the temperature is kept for 3 hours to continue the reaction. After the reaction, the methyl ethyl ketone solvent was distilled and 30% NaOH aqueous solution was added for neutralization. After the methyl ethyl ketone is removed, the pH value of the solution is about 7 to obtain the pesticide suspension dispersant DP-1 of the present invention.

Embodiment 2

[0036] Add 30.6g of MA-2 and 27g of acetone into a four-necked flask equipped with a stirrer, dropping funnel, thermometer and condenser, stir and raise the temperature to 60℃, and then drop and mix 17.2g MB-2 and 10g MC-2 at the same time. 2. A monomer solution of 27.2 g of acetone and an initiator solution of 0.18 g of azobisisobutyronitrile and 3.6 g of acetone. The addition time is controlled within 2 hours, and the reaction temperature is 58-62°C. After the dropwise addition of the monomer solution and the initiator solution is completed, the temperature is raised to 80° C., and the reaction is continued for 3 hours. After the reaction, the acetone solvent was distilled and 30% NaOH aqueous solution was added for neutralization. After the acetone is removed, the pH of the solution is about 7, and the pesticide suspension dispersant DP-2 of the present invention is obtained.

Embodiment 3

[0038] Add 90.9g of MA-3 and 49.9g of methyl ethyl ketone into a four-necked flask equipped with a stirrer, dropping funnel, thermometer and condenser, stir and raise the temperature to 60℃, and then add 7.2g MB-1 and 4.3g dropwise at the same time. MC-3, a monomer solution of 11.5 g of butanone and an initiator solution mixed with 2.05 g of dibenzoyl peroxide and 41 g of butanone, the dropping time is controlled within 2 hours, and the reaction temperature is 58-62°C. After the dropwise addition of the monomer solution and the initiator solution is completed, the temperature is raised to 80° C., and the reaction is continued for 3 hours. After the reaction, the methyl ethyl ketone solvent was distilled and 30% NaOH aqueous solution was added for neutralization. After the methyl ethyl ketone is removed, the pH value of the solution is about 7 to obtain the pesticide suspension dispersant DP-3 of the present invention.

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PUM

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Abstract

The present invention relates to a new-type high-effective agricultural pesticide suspension dispersing agent. It is characterized by that said dispersing agent is obtained by using (by mass%) 50-95% of unsaturated macromonomer with long-chain, 4-49% of unsaturated carboxylic acid or its derivative which can be ionized into carboxylic acid ions in water and 1-46% of other comonomer containing ethylenic bond through a certain copolymerization reaction. The described unsaturated macromonomer with long-chain is polyoxyethylene (methyl) acrylate compound or allyl alcohol polyoxyethylene oxyethylene ether. Besides, said invention also provides its preparation method.

Description

Technical field [0001] The invention relates to a polymer dispersant and a preparation method thereof, in particular to a novel high-efficiency pesticide suspension polymer dispersant and a preparation method thereof. Background technique [0002] Pesticides are an important means of production for mankind and play a pivotal role in the development of world agriculture. Except for a few high volatility and high solubility in water, pesticide technical materials can be used directly, and most of them must be processed into a certain dosage form before they can be used. In addition to pesticide active ingredients, other auxiliary substances in pesticide formulations are collectively referred to as adjuvants. Wettable powders, powders, emulsifiable concentrates and granules were collectively known as the four pesticide formulations in the past. Suspending concentrate is one of the new formulations that have developed vigorously in recent years. It has developed rapidly at home and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/04B01F17/52C08F220/00C08F2/04C09K23/52
Inventor 秦敦忠王星星宋聿炜章旻刘笋陈洪龄
Owner 江苏钟山新材料有限公司
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