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Hyperbranched polyoxyethylene ether and polymerized side-chain hyperbranched polycarboxylic acid

A polyoxyethylene ether and polycarboxylic acid technology, which is applied in the field of side chain hyperbranched polycarboxylic acid and its preparation, can solve the problems of hydrogen bonding, hydrophilic surface activity, limited air entrainment and the like, and can reduce the surface tension. and apparent viscosity, increasing side chain density and improving foaming performance

Inactive Publication Date: 2017-10-20
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The linear polyoxyethylene ethers of traditional comb-shaped polycarboxylic acids can provide limited hydrogen bonding, hydrophilicity, surface activity, and air-entraining properties.

Method used

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  • Hyperbranched polyoxyethylene ether and polymerized side-chain hyperbranched polycarboxylic acid
  • Hyperbranched polyoxyethylene ether and polymerized side-chain hyperbranched polycarboxylic acid
  • Hyperbranched polyoxyethylene ether and polymerized side-chain hyperbranched polycarboxylic acid

Examples

Experimental program
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Effect test

Embodiment 1

[0069] The side-chain hyperbranched polycarboxylic acid uses acrylic acid as a small monomer, sodium methacrylate as a chain transfer agent, ammonium persulfate as an initiator, and a two-arm hyperbranched polyoxygen terminated with a methoxy group. Vinyl ether is a macromonomer, and two-arm hyperbranched polycarboxylic acid is obtained through aqueous solution radical copolymerization.

[0070] Its preparation method is as follows:

[0071] (1) Take 0.1 mol of MPEG with four different molecular weights of 400 (n=8), 600 (n=13), 1000 (n=22) and 2000 (n=45) in four three-necked flasks respectively.

[0072] The general formula of MPEG:

[0073] Put 0.2mol of potassium carbonate into 100ml of dichloromethane, add dropwise a mixture of 0.5mol of thionyl chloride and 30ml of dichloromethane under reflux conditions, and react until complete at 45°C, then rinse and reflux with a small amount of dichloromethane Condensation tube, and filter desalination with sand core funnel, the...

Embodiment 2

[0079] The side-chain hyperbranched polycarboxylic acid uses methyl acrylate and maleic anhydride as small monomers, mercaptoacetic acid as a chain transfer agent, and ammonium persulfate as an initiator through aqueous solution radical copolymerization, and methoxy Four-arm hyperbranched polyoxyethylene ether macromonomers terminated by groups are reacted to obtain four-arm hyperbranched polycarboxylic acids.

[0080] Its preparation method is as follows:

[0081] (1) Take 0.1mol ethanolamine and add 25ml methanol, put it in an ice bath, then add 0.3mol methyl acrylate and add 25ml methanol, put it in a constant pressure dropping funnel, put it under the protection of nitrogen in an ice bath for 0.5h, and then continue to ice bath React for 0.5h, then react in an oil bath at 30°C for 24h in the dark, and distill under reduced pressure at 30°C to obtain M 0.5 ,M 0.5 The FTIR spectrum, 1 H NMR spectrum and 13 C NMR spectrum, see Figure 4~6 . Figure 4 Medium, 3456.36cm ...

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Abstract

The invention discloses hyperbranched polyoxyethylene ether and a preparation method thereof, and side-chain hyperbranched polycarboxylic acid prepared by taking hyperbranched polyoxyethylene ether as a macromonomer. The side-chain hyperbranched polycarboxylic acid employs the hyperbranched polyoxyethylene ether for substituting traditional straight-chain polyoxyethylene ether as the macromonomer for synthesis. The side-chain density of the polycarboxylic acid can be enhanced, under same ethoxy polymerization degree, the ethoxy density of the polyoxyethylene ether macromonomer is increased, the surface tension force and the apparent viscosity of a polycarboxylic acid solution are reduced, and the foaming performance of the polycarboxylic acid is effectively increased.

Description

technical field [0001] The invention relates to a hyperbranched polyoxyethylene ether and a preparation method thereof, and a side chain hyperbranched polycarboxylic acid prepared by polymerization using it as a macromonomer and a preparation method thereof, belonging to the technical field of organic synthetic chemistry and fine chemicals. Background technique [0002] The polycarboxylic acid compound is a compound obtained by copolymerizing small monomers of acrylic acid, acrylate and acid anhydrides and macromonomers of polyoxyethylene ether under the action of an initiator. At present, the traditional comb structure polycarboxylic acid is mainly divided into four categories: (1) methacrylic / methyl acrylate copolymerized polycarboxylic acid; (2) allyl ether copolymerized polycarboxylic acid; (3) ) amide / imide copolymerized polycarboxylic acid; (4) amphoteric copolymerized polycarboxylic acid. The classification methods of the four different types of polycarboxylic acids ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/332C08G65/333C08G65/334C08F283/06C08F220/06C08F220/14C08F222/06C08F2/38
CPCC08G65/3322C08F2/38C08F283/065C08G65/33306C08G65/3344C08G2650/04C08F220/06C08F220/14C08F222/06
Inventor 潘莉莎孙妍袁靖喆林强郑强万雪峰徐鼐庞素娟
Owner HAINAN UNIVERSITY
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