Process for the preparation of porous polymer beads

Details Process for the preparation of porous polymer beads Process for the preparation of porous polymer beads

1988-11-23

1990-07-10

Hoke, Veronica P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 64, 521 89, 521143, 521147, 530413, C08J 928

Patent

active

049407341

ABSTRACT:
Isotropic porous polymer beads having 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.

REFERENCES:
patent: 3938001 (1976-09-01), Coupek et al.
patent: 4094848 (1978-06-01), Naito
patent: 4110529 (1978-08-01), Stoy
patent: 4247498 (1981-01-01), Castro
patent: 4486549 (1984-12-01), Matsumoto et al.
patent: 4519909 (1985-05-01), Castro
patent: 4594207 (1986-06-01), Josefiak et al.
patent: 4666607 (1987-05-01), Josefiak et al.

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