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Unsaturated carboxylic acid/styrene monomer/methoxy polyethylene glycol carboxylate copolymer and preparation method thereof and application thereof, and water suspending agent

A methoxy polyethylene glycol, styrene technology, applied in the field of water suspension agent, preparation, unsaturated carboxylic acid/styrene monomer/methoxy polyethylene glycol carboxylate copolymer, can Solve the problems of high stability, good fluidity, and low cost, and achieve the effects of low viscosity, cost reduction, and short process flow

Active Publication Date: 2020-09-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The main purpose of the present invention is to provide a kind of unsaturated carboxylic acid / styrene monomer / methoxypolyethylene glycol carboxylate copolymer, preparation method, water suspension and application, to solve the problem of adopting existing dispersant system The obtained water suspension concentrate cannot meet the performance requirements such as its low cost, high stability and good fluidity at the same time

Method used

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  • Unsaturated carboxylic acid/styrene monomer/methoxy polyethylene glycol carboxylate copolymer and preparation method thereof and application thereof, and water suspending agent
  • Unsaturated carboxylic acid/styrene monomer/methoxy polyethylene glycol carboxylate copolymer and preparation method thereof and application thereof, and water suspending agent
  • Unsaturated carboxylic acid/styrene monomer/methoxy polyethylene glycol carboxylate copolymer and preparation method thereof and application thereof, and water suspending agent

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preparation example Construction

[0024] As described in the background art, the water suspension prepared by using the existing water dispersant cannot meet the performance requirements of low cost, high stability and good fluidity at the same time. In order to solve the above technical problems, the application provides a preparation method of unsaturated carboxylic acid / styrene monomer / methoxy polyethylene glycol unsaturated carboxylic acid ester copolymer, the preparation method comprising: making excessive unsaturated Carboxylic acid and methoxypolyethylene glycol carry out esterification reaction to obtain a mixed system containing unsaturated carboxylic acid and methoxypolyethylene glycol unsaturated carboxylic acid ester; base copolymerization reaction to obtain unsaturated carboxylic acid / styrene monomer / methoxypolyethylene glycol unsaturated carboxylate copolymer, wherein the weight average molecular weight of methoxypolyethylene glycol is 600~2000; The molar ratio of oxypolyethylene glycol, unsatura...

Embodiment 1

[0058] In the four-neck flask equipped with a thermometer, a stirring device, a spherical condenser, and a water separator, add 4.2g of methoxypolyethylene glycol (molecular weight 1000) and 1.8g of polymerization inhibitor hydroquinone, and then nitrogen gas , heat up to about 80°C, continue to heat up to 120°C under stirring, add 2.5g of p-toluenesulfonic acid, after the material is completely dissolved, add 90.4g of methacrylic acid dropwise to the reaction system for 1 hour, and then keep warm After reacting for 7 hours, the reaction system was cooled to room temperature to obtain a light brown mixed solution of methoxypolyethylene glycol methacrylate and methacrylic acid.

[0059]Add 170g of isopropanol and 60g of deionized water into a 500mL four-necked flask with a stirring and thermometer, stir and heat the system to 80°C, and at the same time add 43.7g of styrene and the above-mentioned synthesized methoxypolyethylene glycol methyl An initiator solution prepared from ...

Embodiment 2

[0061] In the four-necked flask equipped with thermometer, stirring device, spherical condenser and water separator, add 7.6g methoxypolyethylene glycol (molecular weight 1000) and 1.8g polymerization inhibitor hydroquinone, then nitrogen gas , heat up to about 80°C, continue to heat up to 120°C under stirring, add 2.5g of p-toluenesulfonic acid, after the material is completely dissolved, add 90.4g of methacrylic acid dropwise to the reaction system for 1 hour, and then keep warm After reacting for 7 hours, the reaction system was cooled to room temperature to obtain a light brown mixed solution of methoxypolyethylene glycol methacrylate and methacrylic acid.

[0062] Add 170g of isopropanol and 60g of deionized water into a 500mL four-necked flask with a stirring and thermometer, stir and heat the system to 80°C, and at the same time add 43.7g of styrene and the above-mentioned synthesized methoxypolyethylene glycol methyl An initiator solution prepared from a mixed solution...

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Abstract

The invention provides an unsaturated carboxylic acid / styrene monomer / methoxy polyethylene glycol carboxylate copolymer and a preparation method thereof and application thereof, and a water suspendingagent. The preparation method comprises the following steps: carrying out an esterification reaction on excessive unsaturated carboxylic acid and methoxy polyethylene glycol to obtain a mixed systemcontaining unsaturated carboxylic acid and methoxy polyethylene glycol unsaturated carboxylate; carrying out a free radical copolymerization reaction on the mixed system and a styrene monomer to obtain the unsaturated carboxylic acid / styrene monomer / methoxy polyethylene glycol carboxylate copolymer, wherein the weight-average molecular weight of the methoxy polyethylene glycol is 600-2000, and a molar ratio of the methoxy polyethylene glycol to the unsaturated carboxylic acid to the styrene monomer is (0.01-0.1): (2.0-5.5): 1. The preparation method has the advantages of environment friendliness, short technological process, low cost and the like; and the prepared copolymer can improve the suspension stability of the water suspending agent, and enables the water suspending agent to keep low viscosity.

Description

technical field [0001] The invention relates to the field of organic polymers, in particular to an unsaturated carboxylic acid / styrene monomer / methoxy polyethylene glycol carboxylate copolymer, a preparation method, a water suspension and application. Background technique [0002] Water-suspending concentrate (SC) is an environmentally friendly pesticide preparation that has developed rapidly in recent years. Its main advantages are: (1) It uses water as the base, adopts wet processing, and has no dust flying during the production process; EC, no toxic solvent volatilizes during production, is safer for humans and animals, and has no flammability risk; (3) Small particles, high suspension rate, good drug efficacy and good environmental compatibility. In the formulation of water suspension concentrate, dispersant is a very important component, which plays a vital role in the stability of the water suspension concentrate system. [0003] At present, SC dispersants for pestici...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F212/08C08F220/06A01N25/04A01N43/70A01P13/00
CPCA01N25/04A01N43/70C08F283/065C08F212/08C08F220/06
Inventor 张强张言言贾志宇常运平
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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