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Method for preparing fluorine-containing modified amphoteric water-soluble polymer

A water-soluble polymer, amphoteric technology, applied in the field of water-soluble polymer synthesis, can solve the problems of harsh reaction conditions of surfactants, expensive fluorosurfactants, difficult to purify surfactants, etc., and achieves high yields , safe to use and easy to store

Inactive Publication Date: 2009-09-02
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The traditional preparation method of fluorine-modified amphoteric water-soluble polymers usually adopts emulsion polymerization. This preparation method has some disadvantages, such as the fluorosurfactant required in the reaction process is relatively expensive and has a long hydrophobic chain. The requirements for the reaction conditions of the surfactant in the section are relatively harsh, the reaction is difficult to control, and the residual surfactant in the reaction product is difficult to purify, etc.

Method used

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  • Method for preparing fluorine-containing modified amphoteric water-soluble polymer
  • Method for preparing fluorine-containing modified amphoteric water-soluble polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Weigh 2.2g methacryloyloxyethyl-N, N-dimethylpropanesulfonate (DMAPS) and 0.3g perfluorohexyl ethyl acrylate (PFHEA) into tube and thermometer, and measure 100mL dimethyl sulfoxide into the four-necked bottle, seal it tightly, and stir it with magnetic force to dissolve it completely. Weigh 7.5g of acrylamide (AM) into the above mixture, stir to dissolve it. Weigh and add 0.08 g of azobisisobutyronitrile (AIBN) into the above mixture, stir to dissolve, put the four-neck flask in a constant temperature water bath at 25°C, and stir for 30 minutes to pass nitrogen and remove oxygen. Then add a condenser tube with anhydrous calcium chloride drying tube on the top of the round bottom flask, raise the temperature of the water bath to 60°C and react for 12 hours to obtain a uniform viscous transparent mixture. The solid was precipitated with a mixed solution of anhydrous acetone and anhydrous ether (v / v=5:5), and dried to obtain 9.08 g of a solid product of a fluorine-contain...

Embodiment 2

[0044] As described in Example 1, the difference is that the monomer feed ratio was changed to AM 8.6g, DMAPS 1.1g, and PFHEA 0.3g to obtain 8.7g of fluorine-containing modified amphoteric water-soluble polymer powder.

Embodiment 3

[0046] As described in Example 1, the difference is that the monomer feed ratio was changed to AM 8.0g, DMAPS 1.7g, and PFHEA 0.3g to obtain 9.7g of fluorine-containing modified amphoteric water-soluble polymer powder product.

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Abstract

The invention relates to a method for preparing a fluorine-containing modified amphoteric water-soluble polymer, in particular to a method for preparing the fluorine-containing modified amphoteric water-soluble polymer by a cosolvent method and belongs to the technical field of water-soluble macromolecular synthesis. Methacryloyl ethyl-N and N-dimethyl propanesulfonic acid (DMAPS) as amphoteric monomers and perfluoro hexyl ethyl acrylate (PFHEA) and acrylamide (AM) as hydrophobic monomers are copolymerized in a single solvent; azobisisobutyronitrile (AIBN) is used as a catalyst; and the fluorine-containing modified amphoteric water-soluble polymer is obtained. The polymer has good water solubility and remarkable interface activity, thickening, shearing resistance, temperature resistance and salt resistance. Through a mixed solution of anhydrous acetone and anhydrous ether, the polymer is precipitated, dried and pulverized to obtain a powdery product; and the powdery product has wide application prospect in the development of an oil field, dope, printing, household chemical, medicament and other fields.

Description

technical field [0001] The invention relates to a preparation method of a fluorine-containing modified amphoteric water-soluble polymer, in particular to a method for preparing a fluorine-containing modified amphoteric water-soluble polymer through a co-solvent method, and belongs to the technical field of water-soluble polymer synthesis. Background technique [0002] The fluorine-containing modified amphoteric water-soluble polymer refers to a class of water-soluble polymers that introduce perfluorohydrophobic groups and positive and negative ion groups into the hydrophilic macromolecular chain of the polymer. Compared with hydrocarbon chains of the same length, fluorocarbon chains have lower cohesive energy density and surface energy, and their hydrophobic association is stronger than that of hydrocarbon chains. The viscosity of polyacrylamide modified by fluorocarbon chains is relatively The copolymer containing hydrocarbon chains is high and has a good thickening effect,...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/24C08F220/38
Inventor 谭业邦车玉菊
Owner SHANDONG UNIV
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