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Polyether and carboxylic acid double-modified polyethyleneimine aqueous dispersant, and preparation method and application thereof

A water-based dispersant, polyethyleneimine technology, applied in chemical instruments and methods, dyeing polymer organic compound treatment, inorganic chemistry, etc., can solve the problem of insufficient dispersion performance and achieve excellent dispersion effect

Active Publication Date: 2018-11-16
SUN YAT SEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyester-modified polyethyleneimine oily dispersant as mentioned above only introduces anchor groups and solvation chains, which is not enough to provide sufficient dispersion performance for some applications

Method used

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  • Polyether and carboxylic acid double-modified polyethyleneimine aqueous dispersant, and preparation method and application thereof
  • Polyether and carboxylic acid double-modified polyethyleneimine aqueous dispersant, and preparation method and application thereof
  • Polyether and carboxylic acid double-modified polyethyleneimine aqueous dispersant, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 43g of polyethyleneimine (MW1300) and 64.5g of water into the reaction flask, stir to dissolve and then raise the temperature to 50-60°C, add 105.8g of 40% sodium acrylate solution and 300g of polyethylene glycol monomethyl ether (2000) dropwise A mixed solution made of acrylate and 450g of water (the molar ratio of sodium acrylate to polyethylene glycol monomethyl ether acrylic acid is 3:1), after about 1 hour of dripping, continue to react for about 3 hours after dripping, and cool to obtain the water-based dispersant , its solid content is 40%.

Embodiment 2

[0034] Add 43g of polyethyleneimine (MW10000) and 64.5g of water into the reaction flask, stir to dissolve and then raise the temperature to 50-60°C, add dropwise 140g of 40% sodium acrylate solution, 100g of polyethylene glycol monomethyl ether (1000 ) acrylate and 150 g of water (the molar ratio of sodium acrylate to polyethylene glycol monomethyl ether acrylate is 6:1), drop it for about 1 hour, continue to react for about 3 hours after the drop, and cool to obtain the obtained solution Said aqueous dispersant, its solid content is 40%.

Embodiment 3

[0036] Add 43g of polyethyleneimine (MW15000) and 64.5g of water into the reaction bottle, stir to dissolve and then raise the temperature to 50-60°C, add dropwise 105.8g of 40% sodium methacrylate solution, 300g of polyethylene glycol monomethyl ether ( 500) a mixed solution of acrylate and 450g water (the molar ratio of sodium acrylate to polyethylene glycol monomethyl ether acrylic acid is 4:1), after about 1 hour of dripping, continue to react for about 3 hours after dripping, and cool to obtain the aqueous Dispersant, its solid content is 40%.

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Abstract

The invention discloses a polyether and carboxylic acid double-modified polyethyleneimine aqueous dispersant, and a preparation method and an application thereof. The polyethyleneimine molecular chainof the dispersant has a polyether side chain and a carboxylate side group, and the dispersant is prepared through a Michael addition reaction of a primary amino group and a secondary amino group contained in the polyethyleneimine and double bonds contained in alpha, beta-unsaturated acid salts and alpha, beta-unsaturated acid esters of polyether, wherein the polyethyleneimine makes the dispersanthave a good anchoring effect on inorganic powder; the polyether is a solvation chain and makes the dispersant have a steric hindrance effect; carboxylic acid is an ionic group and makes the dispersant have an electrostatic repulsion effect; and the polyether and the carboxylic acid commonly inhibit and prevent the agglomeration of dispersed particles, and the polyethyleneimine, the polyether andthe carboxylic acid are combined to obtain an excellent dispersion performance. The aqueous dispersant has an excellent dispersion performance when applied to water dispersion systems of an inorganicpigment, silicon-carbon powder, graphene and other inorganic powders.

Description

technical field [0001] The invention belongs to the technical field of water-based dispersants. More specifically, it relates to a polyether and carboxylic acid double-modified polyethyleneimine aqueous dispersant and its preparation method and application. Background technique [0002] Dispersant is a surfactant that has two opposite properties of lipophilicity and hydrophilicity in the molecule. It can uniformly disperse the solid and liquid particles of inorganic and organic pigments that are difficult to dissolve in liquid, and at the same time prevent the particles from settling and agglomerating, forming an amphiphilic agent required for a stable suspension. A dispersant must be added when grinding water-insoluble inorganic powder into an inorganic powder water dispersion system with water as the medium. The main functions of the dispersant are as follows: (1) Modify the surface of the inorganic powder to quickly and fully wet particle surface, thereby shortening the...

Claims

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Application Information

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IPC IPC(8): B01F17/52C08G73/04C09C1/00C09C3/10C01B32/194C09K23/52
CPCC01B32/194C08G73/0206C09C1/0009C09C3/10C09K23/16
Inventor 梁晖吴心培卢江李万栋
Owner SUN YAT SEN UNIV
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