TITLE: ASYMMETRIC ULTRAFILTRATION MEMBRANE AND PRODUCTION THEREOF
European Patent EP0037730
 B1

ABSTRACT:
Abstract of EP0037730
The membrane has a water permeability of at least 0.2 cm/min psi and
comprises an open honeycomb structure and a skin integral therewith,
the honeycomb structure and the skin both being of a polymer (such as a
polyimide) having a glass transition temperature of at least 200 DEG C.
The membrane is produced by casting a solution containing not more than
13% by weight of the polymer, into a quench liquid (such as water)
which is a non-solvent for the polymer but miscible with the solvent.

INVENTORS:
Wrasidlo, Wolfgang J.

APPLICATION NUMBER: EP19810301480
PUBLICATION DATE: 09/11/1985
FILING DATE: 04/06/1981

ASSIGNEE: BRUNSWICK CORPORATION
INTERNATIONAL CLASSES: B01D61/18; B01D63/00; B01D69/02; B01D71/48; B01D71/50; B01D71/64;
B01D61/18; B01D63/00; B01D69/00; B01D71/00; (IPC1-7): B01D13/04
EUROPEAN CLASSES: B01D69/02; B01D71/48; B01D71/50; B01D71/64