Method for preparing hyperbranched ionic amide type polymer by inverse emulsion polymerization

An amide polymer, inverse emulsion technology, applied in the field of inverse emulsion polymerization synthesis, can solve the problems of affecting processing performance, poor solubility, increase production cost, etc., and achieve the effect of good flocculation effect and excellent water solubility.

Active Publication Date: 2012-06-13
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ultra-high molecular weight linear amide polymers have poor solubility in water and a low dissolution rate, and the v...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 1.2 parts of dodecyl hydroxystearic acid-ethylene oxide block copolymer, 1.56 parts of Span80, and 8.58 parts of isoparaffin into a 100 ml three-necked flask, stir and mix evenly, pass nitrogen to remove oxygen, and prepare a continuous phase. 3.175 parts of acrylamide, 3.3 parts of methacryloyloxyethyltrimethylammonium chloride aqueous solution (80wt%), 0.0348 parts of 3-benzylthiocarbonylpropionic acid, and 0.24 parts of Tween80 were dissolved in 6.26 parts of water ( PH=7), prepared as a dispersed phase. Set the stirring speed to 400 rpm. At room temperature, add the dispersed phase to the continuous phase dropwise at a constant speed within 1 hour to obtain a monomer emulsion. Add 0.0292 parts of ammonium persulfide, raise the temperature to 50°C, and add 0.0137 parts of hydrogen sulfite Sodium starts to react. After 3 hours of reaction, dissolve 1.9 parts of acrylamide in 1.5 parts of water, add to the reaction system, and after another 3 hours of reaction, di...

Embodiment 2

[0034] Add 0.9 parts of dodecyl hydroxystearic acid-ethylene oxide block copolymer, 2.04 parts of Span80, and 8.58 parts of isoparaffin into a 100 ml three-necked flask, stir and mix evenly, pass nitrogen to remove oxygen, and prepare a continuous phase. Dissolve 1.82 parts of acrylamide, 5.55 parts of methacryloyloxyethyltrimethylammonium chloride aqueous solution (80wt%), 0.0145 parts of 3-benzylmercaptothiocarbonylpropionic acid, and 0.06 parts of Tween80 in 4 parts of water ( PH=4.4), prepared as a dispersed phase. Set the stirring speed to 400 rpm. At room temperature, add the dispersed phase to the continuous phase dropwise at a constant speed within 1 hour to obtain a monomer emulsion. Add 0.0122 parts of ammonium persulfide, raise the temperature to 50°C, and add 0.0066 parts of hydrogen sulfite Sodium starts to react. After reacting for 0.5 hours, dissolve 1.37 parts of acrylamide and 0.0082 parts of N,N'-methylenebisacrylamide in 1.8 parts of water, add to the react...

Embodiment 4

[0040] Add 0.9 parts of dodecyl hydroxystearic acid-ethylene oxide block copolymer, 2.04 parts of Span80, and 8.58 parts of isoparaffin into a 100 ml three-necked flask, stir and mix evenly, pass nitrogen to remove oxygen, and prepare a continuous phase. Dissolve 1.37 parts of acrylamide, 5.55 parts of methacryloyloxyethyltrimethylammonium chloride aqueous solution (80wt%), 0.0146 parts of 3-benzylmercaptothiocarbonylpropionic acid, and 0.06 parts of Tween80 in 4 parts of water ( PH=4.4), prepared as a dispersed phase. Set the stirring speed to 400 rpm. At room temperature, add the dispersed phase to the continuous phase dropwise at a constant speed within 1 hour to obtain a monomer emulsion. Add 0.0122 parts of ammonium persulfide, raise the temperature to 50°C, and add 0.0066 parts of hydrogen sulfite Sodium starts to react. After 1 hour of reaction, dissolve 1.82 parts of acrylamide in 1.8 parts of water, add to the reaction system, and after another 1.5 hours of reaction,...

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PUM

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Abstract

The invention discloses a method for preparing a hyperbranched ionic amide type polymer by inverse emulsion polymerization. The method comprises the following steps: firstly polymerizing ionic monomers or firstly copolymerizing the ionic monomers with a part of amide type monomers through the inverse emulsion polymerization of reversible addition-fragmentation chain transfer (RAFT) by adopting an operation process of adding a follow-up phase under the action of a surfactant, then adding the rest of amide type monomers for chain extension, as well as diene type monomers and an RAFT chain transfer agent so as to prepare the hyperbranched ionic amide type polymer, wherein the outer tail end of a branched chain is an ionic monomer block or a copolymer block with high ion content. The hyperbranched ionic amide type polymer obtained by the method disclosed by the invention has good flocculation effect and excellent water dissolubility.

Description

technical field [0001] The present invention relates to a reverse phase emulsion polymerization synthesis technology of a water-soluble ionic amide polymer, in particular to a method suitable for dispersion, adhesion, flocculation and rheology control and having an ionic monomer block at the end of a branched chain Or the preparation method of the ionic amide polymer of the hyperbranched structure of the high ion degree copolymerization block. Background technique [0002] Ionic amide polymers are widely used in sewage treatment, mining, steel, petrochemical, papermaking, printing and dyeing, sugar, building materials and other fields. [0003] Water-soluble ionic amide polymers can be polymerized by solution or inverse emulsion. During solution polymerization, when the content of monomers such as acrylamide in the system exceeds 8%, the viscosity will be very high, which makes the polymerization process difficult to control and the molecular weight is low. The inverse emu...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/34C08F222/38C08F2/32C08F2/38
Inventor 王文俊郭含培李伯耿朱世平
Owner ZHEJIANG UNIV
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