PROCESS FOR MANUFACTURING FLUOROPOLYMER MEMBRANES

WIPO Patent Application WO/2015/051928

A1

The present invention pertains to a process for manufacturing a fluoropolymer membrane, said process comprising the following steps: (i) providing a composition [composition (C)] comprising, preferably consisting of: - at least one fluoropolymer [polymer (F)], - a water-soluble liquid medium [medium (Mws)] comprising, preferably consisting of, at least one solvent selected from the group consisting of diesters of formula (I-de), esteramides of formula (l-ea) and diamides of formula (l-da): R1 (O=)CO-Ade-OC(=O)R2 (l-de) R1O(O=)C-Aea-C(=O)NR3R4 (l-ea) R5R6N(O=)C-Ada-C(=O)NR5R6 (l-da) wherein: - R1 and R2, equal to or different from each other, are independently selected from the group consisting of C1-C20 hydrocarbon groups; - R3, R4, R5 and R6, equal to or different from each other, are independently selected from the group consisting of hydrogen, C1-C36 hydrocarbon groups, possibly substituted, being understood that R3, R4, R5 and R6 might be part of a cyclic moiety including the nitrogen atom to which they are bound, said cyclic moiety being possibly substituted and/or possibly comprising one or more than one additional heteroatoms, - Ade is a C3-C10 divalent alkylene group comprising one or more ether oxygen atoms, - Aea and Ada, equal to or different from each other, are independently C3-C10 divalent alkylene groups, optionally comprising one or more ether oxygen atoms and/or one or more functional side groups; (ii) processing the composition (C) at a temperature of at least 100°C thereby providing a film; (iii) cooling the film provided in step (ii) to a temperature below 50°C; (iv) contacting the film provided in step (iii) with a non-solvent medium [medium (M NS)] thereby providing a fluoropolymer membrane; and (v) optionally, drying the fluoropolymer membrane provided in step (iv).

SANGUINETI ALDO (IT)
DI NICOLO' EMANUELE (IT)
LEE YOUNG MOO (KR)
DRIOLI ENRICO (IT)
CUI ZHAOLIANG (KR)
HASSANKIADEH NASER TAVAJOHI (KR)
LEE SUK YOUNG (KR)

PCT/EP2014/060629

April 16, 2015

May 23, 2014

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SOLVAY SPECIALTY POLYMERS IT (IT)

B01D67/00; B01D71/32; B01D71/80; H01M50/403; H01M50/426; H01M50/489; H01M50/491; H01M50/494

WO2009092795A1

2009-07-30

US20050098494A1	2005-05-12
US5013339A	1991-05-07

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BENVENUTI, Federica et al. (310, Bruxelles, BE)

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