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1. (WO1998051733) PROCESS FOR MAKING COMPOSITE ION EXCHANGE MEMBRANES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/051733 International Application No.: PCT/US1997/007955
Publication Date: 19.11.1998 International Filing Date: 09.05.1997
IPC:
C08J 5/22 (2006.01) ,C25B 13/08 (2006.01) ,H01M 4/92 (2006.01) ,H01M 8/10 (2006.01)
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
J
WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
5
Manufacture of articles or shaped materials containing macromolecular substances
20
Manufacture of shaped structures of ion-exchange resins
22
Films, membranes or diaphragms
C CHEMISTRY; METALLURGY
25
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
B
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON- METALS; APPARATUS THEREFOR
13
Diaphragms; Spacing elements
04
characterised by the material
08
based on organic materials
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4
Electrodes
86
Inert electrodes with catalytic activity, e.g. for fuel cells
90
Selection of catalytic material
92
Metals of platinum group
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8
Fuel cells; Manufacture thereof
10
Fuel cells with solid electrolytes
Applicants:
E.I. DU PONT DE NEMOURS AND COMPANY [US/US]; 1007 Market Street Wilmington, DE 19898, US
Inventors:
BANERJEE, Shoibal; US
SUMMERS, John, Donald; US
Agent:
HENDRICKSON, John, S.; E.I. du Pont de Nemours and Company Legal/Patent Records Center 1007 Market Street Wilmington, DE 19898, US
Priority Data:
Title (EN) PROCESS FOR MAKING COMPOSITE ION EXCHANGE MEMBRANES
(FR) PROCEDE DE PREPARATION DE MEMBRANES COMPOSITES ECHANGEUSES D'IONS
Abstract:
(EN) A method for making a composite ion exchange membrane including fabricating a layered membrane precursor including a microporous support of highly fluorinated nonionic polymer adhered to a layer of highly fluorinated sulfonyl halide polymer, hydrolizing the layered membrane precursor to convert the highly fluorinated sulfonyl halide polymer to highly fluorinated sulfonate polymer, impregnating the microporous support with a dispersion of highly fluorinated sulfonate polymer or precursor thereof in a polar liquid medium after hydrolyzing, removing the polar liquid medium, and heating to coalesce the highly fluorinated sulfonated polymer in the support.
(FR) L'invention concerne un procédé de préparation d'une membrane composite échangeuse d'ions consistant à fabriquer un précurseur de membrane en couches comprenant un support microporeux en polymère non ionique hautement fluoré collé à une couche de polymère d'halogénure de sulfonyle hautement fluoré, à hydrolyser le précurseur de membrane en couches afin de transformer le polymère d'halogénure de sulfonyle hautement fluoré en polymère de sulfonate hautement fluoré, à imprégner le support microporeux d'une dispersion d'un polymère de sulfonate hautement fluoré ou d'un précurseur de celui-ci dans un milieu liquide polaire après hydrolyse, à enlever le milieu liquide polaire et à chauffer pour coalescer le polymère sulfoné hautement fluoré dans le support.
Designated States: CA, JP
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)