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Epoxy propane/epoxy ethane block copolyether and its preparation method and use

A technology of ethylene oxide block and propylene oxide, which is applied in the fields of application, transportation and packaging, chemical instruments and methods, etc., can solve the problems of non-systematic research on additives, restricting the development of water formulations, etc., and achieve good emulsification and stability High performance and wide adaptability

Active Publication Date: 2008-08-06
JIANGSU ZHONGSHAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be used in pesticide and herbicide spray formulations, water-dispersible granules, powders and other dosage forms, and its applicability is very wide. However, there is no systematic research on adjuvants in this area in my country, and the development of water dosage forms also relies on old agricultural emulsifiers and Imported additives seriously restrict the development of water dosage forms

Method used

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  • Epoxy propane/epoxy ethane block copolyether and its preparation method and use
  • Epoxy propane/epoxy ethane block copolyether and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Put 700g of castor oil and 1.5g of catalyst KOH into a 1L reactor, replace the reactor with nitrogen, vacuumize and dehydrate, raise the temperature to 110°C, and then vacuum strip gas for 2 hours, then feed 280g of PO (propylene oxide) to control The reaction temperature is 100-150°C, the pressure is 0.1-0.6MPa, after the PO is fed, the reaction is aged for 1.5hr, after neutralization, adsorption, dehydration, degassing, and filtering with a leaf filter to obtain castor oil polymer with an average molecular weight of 1300. Oxypropylene ether ether (EL-1).

[0020] Put 260g of castor oil polyoxypropylene ether ether (EL-1) and 0.05g of bimetallic catalyst DMC into a 1L reactor, replace the reactor with nitrogen, vacuumize and dehydrate, raise the temperature to 110°C, and vacuum strip the gas for 2 hours. Then 540g of PO (propylene oxide) was introduced, the reaction temperature was controlled at 120-170°C, and the pressure was 0.1-0.6MPa. Pass into 200 grams of EO (et...

Embodiment 2

[0023] Put 700g of castor oil and 1.5g of catalyst KOH into a 1L reactor, replace the reactor with nitrogen, vacuumize and dehydrate, raise the temperature to 110°C, and then vacuum strip gas for 2 hours, then feed 280g of PO (propylene oxide) to control The reaction temperature is 100-150°C, the pressure is 0.1-0.6MPa, after the PO is fed, the reaction is aged for 1.5hr, after neutralization, adsorption, dehydration, degassing, and filtering with a leaf filter to obtain castor oil polymer with an average molecular weight of 1300. Oxypropylene ether ether (EL-1).

[0024] Put 260g of castor oil polyoxypropylene ether ether (EL-1) and 0.04g of bimetallic catalyst DMC into a 1L reactor, replace the reactor with nitrogen, vacuumize and dehydrate, raise the temperature to 110°C, and vacuum strip the gas for 2 hours. Then 560g of PO (propylene oxide) was introduced, the reaction temperature was controlled at 120-170°C, and the pressure was 0.1-0.6MPa. Pass into 200 grams of EO (et...

Embodiment 3

[0026] Put 700g of castor oil and 1.5g of catalyst KOH into a 1L reactor, replace the reactor with nitrogen, vacuumize and dehydrate, raise the temperature to 110°C, and then vacuum strip gas for 2 hours, then feed 280g of PO (propylene oxide) to control The reaction temperature is 100-150°C, the pressure is 0.1-0.6MPa, after the PO is fed, the reaction is aged for 1.5hr, after neutralization, adsorption, dehydration, degassing, and filtering with a leaf filter to obtain castor oil polymer with an average molecular weight of 1300. Oxypropylene ether ether (EL-1).

[0027] Put 260g of castor oil polyoxypropylene ether ether (EL-1) and 0.06g of bimetallic catalyst DMC into a 1L reactor, replace the reactor with nitrogen, vacuumize and dehydrate, raise the temperature to 110°C, and vacuum strip the gas for 2 hours. Then 560g of PO (propylene oxide) was introduced, the reaction temperature was controlled at 120-170°C, and the pressure was 0.1-0.6MPa. Pass into 220 grams of EO (et...

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Abstract

An epoxypropane / epoxypropane block copolyether of high-effective disperser is represented as the formula at right, wherein b1+b2+b3=40-60, a1+a2+a3=15-25. The epoxypropane / epoxypropane block copolyether will not be dissociated into ion state in water and is in state of ether linkage, while the oxygen atom and hydroxyl of the chain can generate hydrogen bond with hydrone to obtain high stability and avoid the effect of strong electrolyte and obtain better emulsion, disperse, humidification and solubilization characters, therefore, the block polyether high-effective polyether high-effective disperser which uses castor oil as starting oil has better emulsion and disperse effects than the Pluronics block polyether which uses propanediol as starting agent, caused by hydrophobic castor oil, with wide application in agricultural chemical aqueous-base agent. The invention discloses a relative preparation method.

Description

technical field [0001] The invention relates to a block polyether type high-efficiency dispersant and a preparation method thereof. Background technique [0002] my country is a large agricultural country, and the annual output of pesticide preparations is about 1 million tons. At present, the structure of pesticide formulations in my country is unreasonable, and old formulations such as emulsifiable concentrates and wettable powders are still the main ones. Among them, emulsifiable concentrates account for nearly 50% of the share of nearly 500,000 tons, and the annual consumption of organic solvents such as toluene and xylene is as high as 200,000 tons. The value is RMB 1.1 billion. Organic solvents are sprinkled on the land along with pesticides, increasing the residue of toxic substances in crops, causing harm to people's health, reducing the quality of crops, affecting the export of crops, and polluting soil and water sources. Organic solvents have a low flash point and...

Claims

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Application Information

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IPC IPC(8): C08G65/26C08G65/32B01F17/52A01N25/04C09K23/52
Inventor 戚莉孙红霞章旻宋聿炜
Owner JIANGSU ZHONGSHAN CHEM
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