Synthetic hydrophilic membranes and method for their manufacture

Details Synthetic hydrophilic membranes and method for their manufacture Synthetic hydrophilic membranes and method for their manufacture

1992-04-16

1993-09-21

Sever, Frank

Liquid purification or separation

Filter

Material

21050041, 264 41, 264DIG48, 264DIG62, B01D 7168

Patent

active

052465829

ABSTRACT:
A synthetic hydrophilic membrane, and method for manufacturing thereof, in the form of hollow fibers or flat membranes for dialysis and/or ultrafiltration, containing a mixture of polysulfone and sulfonated polysulfone, the mixture containing 65 to 95 wt.% sulfonated polysulfone, possibly as a salt of sulfonic acid, and 35 to 5 wt.% unsulfonated polysulfone. Preferably, up to 12 wt.% water-soluble polymers, based on the total mixture, are added to the mixture of polysulfone and sulfonated polysulfone before formation of the membrane.

REFERENCES:
patent: 3855122 (1974-12-01), Bourganel
patent: 4207182 (1980-06-01), Marze
patent: 4976859 (1990-12-01), Wechs
patent: 5028337 (1991-07-01), Linder et al.

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