TITLE: Plasmapheresis membrane and process for the preparation thereof.
European Patent Application EP0044958 A1

ABSTRACT:
Abstract not available for EP0044958
Abstract of corresponding document: US4608172
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.

INVENTORS:
Goehl, Hermann Joseph
Buck, Reinhold Johann

APPLICATION NUMBER: EP19810105019
PUBLICATION DATE: 02/03/1982
FILING DATE: 06/29/1981

ASSIGNEE: Gambro, Dialysatoren (DE)
INTERNATIONAL CLASSES: B01D71/50; A61M1/16; B01D69/02; C08G64/18; C08G64/40; (IPC1-7):
B01D13/04; A61M1/03; C08L69/00
EUROPEAN CLASSES: B01D71/80; B01D69/02; C08G64/18B; C08G64/40

DOMESTIC PATENT REFERENCES:
EP0024600 N/A

FOREIGN REFERENCES:
FR2156761A1
FR2200035A1
WO/1979/001120A1 FILTRATION APPARATUS FOR SEPARATING BLOOD
  CELL-CONTAINING LIQUID SUSPENSIONS
FR2344315A1
FR2265807A1
DE2921138A1
FR2265812A1
FR2300606A1
FR2007782A5

OTHER REFERENCES:
JOURNAL MACROMOL. SCI: -CHEM., A 4 (3), May, 1970, New York, US, R.E.
KESTING "Control of Polymer Morphology of Biomedical Applications. I.
Hydrophilic Polycarbonate Membranes for Dialysis" pages 655 - 664