TITLE: Fluorinated polymeric membranes for gas separation processes.
European Patent Application EP0226141 A2

ABSTRACT:
Abstract not available for EP0226141
Abstract of corresponding document: US4657564
The present invention is a treated, semi-permeable, polymeric membrane
having improved selectivity for separating components of a gas mixture.
The membrane is provided by fluorinating a polymer cast into membrane
form, having the general structural formula: wherein R1 is a linear or
branched C1-C4 alkyl group; R2 and R3 are independently linear or
branched C1-C6 alkyl groups; R4 is a linear or branched C1-C12 alkyl or
aryl group; X is a C1-C3 alkyl group or m is at least 100; and n is 0
or 1.

INVENTORS:
Langsam, Michael

APPLICATION NUMBER: EP19860116924
PUBLICATION DATE: 06/24/1987
FILING DATE: 12/05/1986

ASSIGNEE: AIR PROD & CHEM (US)
INTERNATIONAL CLASSES: C08J5/18; B01D53/22; B01D67/00; B01D71/44; B01D71/70; C08F8/20;
C08F8/22; (IPC1-7): B01D13/04; B01D53/22; C08F138/00; C08F8/22;
C08J7/12
EUROPEAN CLASSES: B01D67/00R18; B01D71/44; C08F8/22

FOREIGN REFERENCES:
JP60232205AGAS SEPARATING MOLDED BODY
WO/1983/003419A1 CONTROLLED SURFACE-FLUORINATION PROCESS

OTHER REFERENCES:
PATENT ABSTRACTS OF JAPAN, vol. 9, no. 45 (C-268)Ä1768Ü, 26th February
1985; & JP-A-59 189 913 (NIPPON OIL SEAL KOGYO K.K.) 27-10-1984