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Preparation method of amphoteric polyacrylamide dispersion liquid

A polyacrylamide and acrylamide technology, applied in the field of water-soluble polymers, can solve the problems of unsatisfactory application effect, reduced effective material content, poor product stability, etc., and achieves low energy consumption, short time consumption, and low equipment requirements. Effect

Active Publication Date: 2015-04-29
JIANGSU FEYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Most of the amphoteric polyacrylamide dispersions obtained in the current research have low intrinsic viscosity, and the low molecular weight leads to unsatisfactory application effects; most of the dispersion systems used are single cationic polymers, and the product stability is poor; at the same time, during the polymerization process A large amount of inorganic salt is used, which increases the cost and reduces the content of effective materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Add 155 parts of deionized water, 28 parts of dispersion stabilizer (30%) (polyethylene glycol and polymethacryloyloxyethyltrimethyl ammonium chloride-acrylic acid), after fully dissolved, add 55 parts of ammonium sulfate, 32 parts of acrylamide, 4 parts of dimethylaminoethyl methacrylate, 25 parts of methacryloyloxyethyltrimethylammonium chloride, 3 parts 1 part of itaconic acid, 0.015 part of ethylenediaminetetraacetic acid disodium salt, stir to make it fully dissolved, adjust the pH to 3.0-3.5 with a pH regulator, adjust the speed to 800 rpm, and blow nitrogen for 30 minutes to remove oxygen. After adjusting the system temperature to the initiation temperature, add 2 parts of 1% V50 aqueous solution to initiate the reaction. After 1.5 hours of reaction, the viscosity of the system begins to increase. After about half an hour, the viscosity of the system decreases and changes from transparent to milky white dispersion. React for 6-8 hours Then add 1 part of 1% V50 aq...

Embodiment 2

[0041] Add 155 parts of deionized water, 21 parts of dispersion stabilizer (30%) (polymethacryloyloxyethyltrimethylammonium chloride -2-acrylamido-2-methylpropanesulfonic acid), after fully dissolved, add 1 part of sodium sulfate, 54 parts of ammonium sulfate, 32 parts of acrylamide, 4 parts of dimethylaminoethyl methacrylate, 25 parts of methyl Acryloyloxypropyltrimethylammonium chloride, 3 parts of acrylic acid, 0.01 part of sodium hypophosphite, 0.02 part of ethylenediaminetetraacetic acid disodium salt, stir to fully dissolve, adjust the pH to 3.5-4.0 with a pH regulator, Adjust the rotation speed to 800 rpm, blow nitrogen for 30 minutes to remove oxygen, adjust the system temperature to the initiation temperature, and then add 2 parts of 1% VA-044 aqueous solution to initiate the reaction. After 1.5 hours of reaction, the viscosity of the system begins to increase, about half an hour Afterwards, the viscosity of the system decreases and changes from transparent to a milky...

Embodiment 3

[0043] Add 155 parts of deionized water, 24.5 parts of dispersion stabilizer (30%) (polymethacryloyloxyethyltrimethylammonium chloride -itaconic acid), fully dissolved and added 1 part of sodium sulfate, 54 parts of ammonium sulfate, 32 parts of acrylamide, 4 parts of N-vinylpyrrolidone, 25 parts of methacryloxypropyl trimethyl ammonium chloride, 3 parts 1 part of maleic acid, 0.02 part of sodium methallyl sulfonate, 0.015 part of sodium salt of diethylenetriaminepentaacetic acid, stir to fully dissolve, adjust the pH to 4.0-4.5 with a pH regulator, and adjust the speed to 800 rpm Minutes, blow nitrogen for 30 minutes to remove oxygen, adjust the temperature of the system to the initiation temperature, and use 2 parts of 1% azobisisobutyronitrile solution to initiate the reaction. After 1.5 hours of the reaction, the viscosity of the system begins to increase. Reduce and change from transparent to milky white dispersion. After reacting for 6-8 hours, add 1 part of the above-me...

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Abstract

The invention discloses a preparation method of amphoteric polyacrylamide dispersion liquid. The preparation method comprises the following steps: putting a main functional monomer into a mixed system comprising an amphoteric dispersion stabilizer, a chelating agent, a pH regulator and inorganic salt deionized water solution; initiating a reaction by virtue of an initiating agent; and preparing the amphoteric polyacrylamide dispersion liquid by virtue of a dispersion polymerization method. The dispersion liquid prepared by adopting a novel amphoteric polymer dispersion stabilizer has the characteristics of good stability, high molecular weight, high dissolution rate and the like, and a synthetic process of the dispersion liquid is environment-friendly and pollution-free and is low in energy consumption, and the product is nontoxic and noncorrosive, cannot generate secondary pollution and accords with the development direction of green and environment-friendly chemical assistants. The amphoteric polyacrylamide dispersion liquid has an application prospect in the fields of water treatment, papermaking, printing and dyeing, oil fields, mining, daily chemicals and the like.

Description

technical field [0001] The invention belongs to the technical field of water-soluble polymers, and in particular relates to a preparation method of an amphoteric polyacrylamide dispersion. Background technique [0002] Amphoteric polyacrylamide has a wider range of applications because it contains both anionic and cationic groups in its molecules. Its comprehensive performance, and has the characteristics of obvious reverse polyelectrolyte effect and wide pH adaptability. The preparation methods of amphoteric polyacrylamide include aqueous solution polymerization, emulsion polymerization, inverse emulsion polymerization, dispersion polymerization and so on. Dispersion polymerization not only has the characteristics of fast emulsion polymerization reaction speed and high molecular weight, but also has the advantages of simple solution polymerization process and convenient operation. Moreover, the dispersion polymerization system also has the advantages of low apparent viscos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/34C08F222/02C08F220/06C08F226/10C08F228/02C08F220/44C08F220/58C08F226/02C08F2/38C08F2/16
Inventor 史亚鹏王勤张海玲魏星光李平周涛张萍郭志宇
Owner JIANGSU FEYMER TECH
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