TITLE: HIGHLY ANISOTROPIC MEMBRANES AND PROCESS FOR MAKING SAME
European Patent Application EP0042766 A3

ABSTRACT:
Abstract of EP0042766
There are disclosed highly anisotropic membranes comprising cellulose
nitrate or cellulose nitrate-cellulose acetate mixed ester polymers,
and comprising an integral bilayer of a first layer of cells and a
second layer of cells, the cells of the first layer being at least 3
times larger (preferably 5+/- 1 times larger) than the cells of the
second layer. There is also disclosed a process for making such
membranes by casting from a solution of said polymer in a solvent and a
non-solvent. The membranes have many uses, e.g. in laboratory and
industrial filtration of liquids, bacterial sterilisation etc.

INVENTORS:
Kesting, Robert Emil

APPLICATION NUMBER: EP19810302838
PUBLICATION DATE: 05/26/1982
FILING DATE: 06/24/1981

ASSIGNEE: PUROPORE, INC.
INTERNATIONAL CLASSES: B01D61/00; A61L2/02; B01D71/20; B05D5/00; (IPC1-7): B01D13/04
EUROPEAN CLASSES: B01D71/20; A61L2/02F; B01D67/00K14B; B01D71/16