Plasmapheresis membrane and process for the preparation thereof

Details Plasmapheresis membrane and process for the preparation thereof Plasmapheresis membrane and process for the preparation thereof

1984-11-06

1986-08-26

Spear, Frank

Liquid purification or separation

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210654, 21050028, B01D 1300

Patent

active

046081720

ABSTRACT:
Plasmapheresis membranes of hydrophilic polycarbonates are disclosed, comprising polycondensates of bisphenol A and a polyalkylene oxide. These membranes which have a regular pore structure with smoothly rounded pores with openings without sharp edges, have an average pore diameter of about 0.01 to 0.8.mu., a porosity preferably above 65%, and a thickness of between about 50 and 300.mu.. Processes for preparing these membranes are also disclosed, including casting a 3 to 20 weight percent polycarbonate polymer solution onto a smooth surface, contacting the layer with a gelling medium prior to precipitation of the membrane, and subsequent precipitation of the gelled layer to form the membrane.

REFERENCES:
patent: 3615024 (1971-10-01), Michaels
patent: 3945926 (1976-03-01), Kesting
patent: 3957651 (1976-05-01), Kesting
patent: 4032309 (1977-06-01), Salemme
patent: 4247498 (1981-01-01), Castro
patent: 4279752 (1981-07-01), Sueoka et al.
Porter, et al.; "Membrane Ultrafiltration"; 1-1971; 8 pp.

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