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Pesticide suspension concentrate dispersing agent and novel preparation method thereof

A technology of dispersant and suspending agent, applied in the field of high-efficiency pesticide suspending agent and dispersing agent and its preparation method, which can solve the problems of high cost and dependence on imports

Inactive Publication Date: 2013-02-06
JIANGSU ZHONGSHAN CHEM
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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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  • Pesticide suspension concentrate dispersing agent and novel preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 50.8g MA-1, 25.5g MB-1, 23.7g MC-1, 16.8g NaOH, 0.1g acrylamide, 20g SF-1 to a four-necked flask equipped with a stirrer, dropping funnel, thermometer and condenser and 244g of water, stir and heat up to 60°C, turn on the N 2 protection, and then began to slowly drop 25ml of potassium persulfate aqueous solution with a concentration of 1.5wt%, controlling the dropping time within 4h, and the reaction temperature at 58-62°C. After the initiator was added dropwise, the temperature was raised to 90°C to continue the reaction for 2 hours. 2 After cooling down to room temperature, evacuate to 480mmHg to remove unreacted monomers and small molecule polymers to obtain the pesticide suspension and dispersant of the present invention.

[0037]

Embodiment 2

[0039] Add 50.8g MA-1, 33.5g MB-2, 15.7g MC-2, 22.1g NaOH, 0.1g acrylamide, 20g SF-2 to a four-necked flask equipped with a stirrer, dropping funnel, thermometer and condenser and 244g of water, stir and heat up to 60°C, turn on the N 2protection, and then began to slowly drop 25ml of azoamidine aqueous solution with a concentration of 1.5wt%, controlling the dropping time within 4h, and the reaction temperature at 58-62°C. After the initiator was added dropwise, the temperature was raised to 80°C to continue the reaction for 2.5 hours. 2 After cooling down to room temperature, evacuate to 480mmHg to remove unreacted monomers and small molecule polymers to obtain the pesticide suspension and dispersant of the present invention.

[0040]

Embodiment 3

[0042] Add 50.8g of MA-1, 33.5g of MB-2, 20g of SF-2, 22.1g of NaOH and 244g of water into a four-neck flask equipped with a stirrer, dropping funnel, thermometer and condenser tube, stir to raise the temperature to 60°C, and open N 2 protection, then start to slowly add 8ml of azoamidine aqueous solution with a concentration of 1.5wt%, then add 15.7g MC-2 and 0.1g acrylamide, continue to dropwise add 17ml of initiator, control the dropping time within 4h, and the reaction temperature is at 58~62℃. After the initiator was added dropwise, the temperature was raised to 90°C to continue the reaction for 2 hours. 2 After cooling down to room temperature, evacuate to 480mmHg to remove unreacted monomers and small molecule polymers to obtain the pesticide suspension and dispersant of the present invention.

[0043]

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PUM

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Abstract

The invention discloses a pesticide suspension concentrate dispersing agent which is a polymer with a comb-shaped structure, wherein a main chain of the polymer is connected by C-C bonds; and a side chain containing polyethylene oxide or polypropylene oxide and a carboxyl strong polar group capable of being ionized are connected to a side chain of the polymer. The pesticide suspension concentrate dispersing agent is prepared according to the method that unsaturated macromonomers A of the long chain containing the polyethylene oxide or the polypropylene oxide, unsaturated carboxylic acid or derivative monomers B thereof and other copolymer monomers C containing ethylenic bonds are mixed and dissolved in water, wherein the total amount of the A, the B and the C is 100 percent by mass; then a pH (potential of hydrogen) regulator is added to a reaction system so as to enable a solution to be electrically neutral; a cross-linking agent for controlling the molecular weight of a product and a surfactant are added to the solution, and the solution is stirred and heated to a reaction temperature under the protection of N2; a free radical initiator is dripped to the solution to initiate an emulsion polymerization reaction; after the reaction is finished, the solution is vacuumized to remove unreacted monomers and small molecular polymers, and then the dispersing agent of the pesticide suspension concentrate is obtained. The molecular weight of the pesticide suspension concentrate dispersing agent is 5000 to 500000.

Description

technical field [0001] The invention relates to a dispersant and a preparation method thereof, in particular to a high-efficiency pesticide suspension dispersant and a preparation method thereof. Background technique [0002] Pesticides are important means of production for human beings and play a pivotal role in the development of world agriculture. Except for a few pesticides with high volatility and high solubility in water, which can be used directly, most of them must be processed into certain dosage forms before they can be used. In addition to the active ingredients of pesticides, other auxiliaries in pesticide formulations are collectively referred to as adjuvants. Wettable powders, powders, emulsifiable concentrates and granules used to be called the four major pesticide formulations. Suspension concentrate is one of the new dosage forms that have been booming in recent years. It has developed rapidly at home and abroad, and is recognized as an "epoch-making" new ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F220/06C08F222/02C08F222/06C08F216/18C08F220/18C08F210/14C08F226/06C08F2/26C08F2/30A01N25/30A01N25/04
Inventor 申宝兵李清华王永生宋聿炜刘笋
Owner JIANGSU ZHONGSHAN CHEM
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