TITLE: METHOD FOR PREPARING A MEMBRANE OF A FILM-FORMING NON-SULFONATED
SULFONE POLYMER
European Patent EP0036947
 B1

ABSTRACT:
Abstract of EP0036947
Sulfone polymer ultrafiltration membranes with remarkably high
permeability to solvent at low pressure combined with excellent
retention of low molecular weight macro-molecules and sharp molecular
weight cutoff are prepared by casting a sheet of said polymer dissolved
in a specified solvent (hexamethylphosphoramide) evaporating a portion
of the solvent from the sheet and immersing said sheet in a gelation
liquid therefore.

INVENTORS:
Benzinger, William Donald
Hinde, George Morralee
Toal, Margaret Gavin

APPLICATION NUMBER: EP19810101354
PUBLICATION DATE: 11/09/1983
FILING DATE: 02/25/1981

ASSIGNEE: PENNWALT CORPORATION
INTERNATIONAL CLASSES: C08G75/00; B01D71/68; C08J3/09; C08J9/28; C08L81/06; (IPC1-7):
B01D13/04; C08L81/06
EUROPEAN CLASSES: B01D71/68; B01D61/14D; B01D67/00K14B; C08J3/09B6+L81/06