Hydrophilic PVDF semipermeable membrane
AssigneeRhone-Poulenc Recherches
InventorAlbert Fabre
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Abstract
Hydrophilic semipermeable membranes which retain their capacity for filtration, even after drying, and which are well adapted for either ultrafiltration or microfiltration, are comprised of at least 70% by weight of polyvinylidene fluoride (PVFD) and up to 30% by weight of a hydrophilic polymer compatible therewith, e.g., a cellulose acetate or sulfonated polysulfone.
Claims9
A hydrophilic semipermeable membrane comprising at least 70% by weight of polyvinylidene fluoride, and a minor effective amount, no more than 30% by weight, of a hydrophilic polymer compatible therewith selected from the group consisting of sulfonated polysulfone and copolymers of acrylonitrile and sulfone monomers.
Dependencies are inferred from the claim text.