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Title:
TRIFLUOROSTYRENE CONTAINING COMPOUNDS GRAFTED TO BASE POLYMERS
Document Type and Number:
WIPO Patent Application WO2005049204
Kind Code:
A3
Abstract:
A fluorinated ion exchange polymer prepared by grafting a monomer on to a base polymer, wherein the grafting monomer is selected from the group consisting of structure 1a, structure 1b and mixtures thereof, (INSERT 1a and 1b HERE) wherein Y is selected from the group consisting of -RFSO2F (sulfonyl fluoride), -RFSO3M (fluorosulfonic acid or salt), RFSO2NH2 (fluorosulfonamide), and -RFSO2N(M)SO2R<2>F (imide); wherein M is H, an alkali cation, or ammonium; and RF and R<2>F groups are perfluorinated or partially fluorinated, and may optionally include ether oxygens; and n is between 1 and 2 for 1a, or n is between 1 and 3 for 1b. These ion exchange polymers are useful in preparing catalyst coated membranes and membrane electrode assemblies used in fuel cells.

Inventors:
CHOUDHURY BISWAJIT (CA)
ROELOFS MARK GERRIT (US)
YANG ZHEN-YU (US)
Application Number:
US2004020704W
Publication Date:
December 15, 2005
Filing Date:
June 25, 2004
Export Citation:
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Assignee:
E.I. DUPONT DE NEMOURS AND COMPANY
CHOUDHURY, BISWAJIT
ROELOFS, MARK, GERRIT
YANG, ZHEN-YU
International Classes:
C08F255/02; C08F259/08; C08F291/18; (IPC1-7): C08F291/00; C08F291/18; B01D71/28; B01D71/78; C08F259/08; C08F255/02
Domestic Patent References:
WO2001058576A12001-08-16
WO2003018654A12003-03-06
WO2004026929A12004-04-01
WO2003006515A12003-01-23
Foreign References:
US6359019B12002-03-19
US4113922A1978-09-12
US20020137806A12002-09-26
US4169023A1979-09-25
US4384941A1983-05-24
US4481306A1984-11-06
US4396727A1983-08-02
US5536754A1996-07-16
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