Patent ID: 9217045
Filing Date: 2015-12-22
Classification: C08F

Abstract:
1. A process for the purification from ionic impurities of a fluoroionomer liquid composition, said process comprising: contacting a liquid composition, said liquid composition comprising at least one fluoroionomer (I-1) and ionic impurities in a liquid medium, with a solid particulate comprising at least one fluoroionomer (I-2) having ion exchange groups, wherein H separating said liquid composition from said solid particulate, wherein fluoroionomer (I-1) and fluoroionomer (I-2) are selected from fluoroionomers (I) comprising recurring units derived from at least one fluorinated functional monomer selected from: sulfonated perfluoroolefins of formula (M1): wherein n is an integer between 0 and 6; and X′ is selected from the group consisting of Cl, F, Br, I and —O − M + , wherein M + is a cation selected from the group consisting of H + , NH 4 + , K + , Li + , Na + , and mixtures thereof; sulfonated perfluorovinylethers of formula (M2): wherein m is an integer between 1 and 10; and X′ is selected from the group consisting of Cl, F, Br, I and —O − M + , wherein M + is a cation selected from the group consisting of H + , NH 4 + , K + , Li + , Na + , and mixtures thereof; sulfonated perfluoroalkoxyvinylethers of formula (M3): wherein w is an integer between 0 and 2, RF 1 and RF 2 , equal or different from each other and at each occurrence, are independently —F, —Cl or a C 1-10 perfluoroalkyl group, y is an integer between 0 and 6; and X′ is selected from the group consisting of Cl, F, Br, I and —O − M + , wherein M + is a cation selected from the group consisting of H + , NH 4 + , K + , Li + , Na + , and mixtures thereof; sulfonated aromatic (per)fluoroolefins of formula (M5): wherein Ar is a C 3-15 aromatic or heteroaromatic moiety and X′ is selected from the group consisting of Cl, F, Br, I and —O − M + , wherein M is a cation selected from the group consisting of H + , NH 4 + , K + , Li + , Na + , and mixtures thereof; and (M6) mixtures thereof.