Fluoropolymers and membranes comprising fluoropolymers (III)
AssigneePall Corporation
InventorsFrank Okezie Onyemauwa, Hassan Ait-Haddou, Ying Labreche
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Abstract
Disclosed are fluoropolymers with low CWST values and porous membranes made from the fluoropolymers. The fluoropolymer is made up of polymerized monomeric units of the formula A-X—CH2—B, wherein A is C6F13—(CH2)2, X is O or S, and B is vinylphenyl, and the fluoropolymer has a weight average molecular weight (Mw) of at least 100 Kd and/or a glass transition temperature of at least 33° C. copolymer. The porous membranes are suitable for degassing a variety of fluids.
Claims13
A porous membrane comprising a porous polymeric support and a fluoropolymer, wherein the fluoropolymer comprises polymerized monomeric units of the formula
- A-X—CH2—B,
- wherein A is C6F13—(CH2)2, X is O or S, and B is vinylphenyl, and the fluoropolymer has a weight average molecular weight (Mw) of at least 100 Kd and/or a glass transition temperature of at least 33° C.,
- wherein the porous polymeric support is selected from PVC/PAN, polysulfone, polyamide, cellulose, polyester, PPS, PPSU (polyphenyl sulfone), PVDF, PVF (polyvinyl fluoride), FEP (fluorinated ethylene-propylene), ETFE (polyethylenetetrafluoroethylene), PFPE (perfluoropolyether), PFSA (perfluorosulfonic acid), perfluoropolyoxetane, polyimide, polyether imide, polycarbonate, and polystyrene, and
- wherein the porous membrane has a CWST of 15 to 23 dynes/cm.
Dependencies are inferred from the claim text.