TITLE: PRODUCTION OF A LIQUID COMPOSITION CONTAINING A PERFLUORINATED ION
EXCHANGE POLYMER, AND THE USE OF THIS POLYMER
European Patent EP0066369
 B1

ABSTRACT:
Abstract not available for EP0066369
Abstract of corresponding document: US4433082
A process is provided for making a liquid composition of a
perfluorinated polymer having sulfonic acid or sulfonate groups in a
liquid medium by contacting the polymer with a mixture of 25 to 100% by
weight of water and 0 to 75% by weight of a second liquid component
such as a lower alcohol, e.g., propanol or methanol, at a temperature
of at least 180 DEG C. (at least 240 DEG C. when about 90% to 100%
water is used), in a closed system. The liquid composition made by this
process, or modified liquid products prepared therefrom, are used in
coating various substrates, in casting films, and in repairing
perfluorinated ion exchange films and membranes. The process is also
useful in recovering perfluorinated polymer having sulfonic acid or
sulfonate groups from scrap and used articles made of such polymer or
containing such polymer as a component part thereof.

INVENTORS:
Grot, Walther Gustav

APPLICATION NUMBER: EP19820302188
PUBLICATION DATE: 08/14/1985
FILING DATE: 04/28/1982

ASSIGNEE: E.I. DU PONT DE NEMOURS AND COMPANY
INTERNATIONAL CLASSES: B01J47/12; B01D65/00; B01D71/82; B01J31/00; B01J39/16; B01J39/20;
C08F8/00; C08F14/18; C08J3/02; C08J3/09; C08J5/20; C08J5/22; C08K5/00;
C08K5/05; C08K5/06; C08L1/00; C08L27/00; C08L27/12; C08L29/00;
C08L29/10; C08L101/00; (IPC1-7): C08L27/18; C08J3/04; C08J7/02;
C08J5/22; C25B13/08; B01D13/04; C08F6/04; C08J11/04
EUROPEAN CLASSES: C08J3/09B+L27/12; C08J5/22B2B1; C08J5/22D2