Process for the preparation of porous polyacrylonitrile...

Details Process for the preparation of porous polyacrylonitrile... Process for the preparation of porous polyacrylonitrile...

C - Chemistry, Metallurgy

08

J

252/31, 195/35.4

C08J 9/22 (2006.01) B01J 20/26 (2006.01) B01J 20/28 (2006.01) C08J 3/12 (2006.01) C08J 9/28 (2006.01) C08L 33/20 (2006.01)

Patent

CA 2003448

30,987 PROCESS FOR THE PREPARATION OF POROUS POLYMER BEADS ABSTRACT Isotropic porous polymer beads having a high controllable surface porosity and large pore diameters from about 0.002 to about 5 microns are produced from solutions of an acrylonitrile polymer or a copolymer by a thermally-induced phase separation process including intensively shearing the polymer solution into small droplets. The use of mixed solvent non-solvent combinations as solvents for the polymers, and preferably reducing the polymer content in solution to below 10 percent produces high pore content, substantially spherical beads having a morphology ideally suited to the chromatography of large molecules, such as proteins, and for enzyme-binding.

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