Hydrophilic membranes prepared from polyethersulfone/poly-2-oxazoline/polyvinylpyrrolidone blend
AssigneeGelman Sciences, Inc.
InventorsHopin Hu, Inessa Katsnelson, Xiaosong Wu
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Abstract
Porous blended hydrophilic copolymer (polyethersulfone resin, poly-2-oxazoline resin, and polyvinylpyrrolidone resin) microporous membranes are provided which are useful for filtering macromolecules or particles from fluids. The invention also concerns a process for filtering matter from a fluid, employing the membranes.
Claims20
A hydrophilic filtration membrane that is instantly water wettable and has a microporous matrix comprising a homogeneous blend of polyethersulfone resin, poly(2-alkyl or aryl)-2-oxazoline resin, and polyvinylpyrrolidone resin, the polyvinylpyrrolidone resin being present in a non-leachable amount sufficient to make the membrane instantly water wettable even after prolonged extraction with alcohol.
A process of preparing a hydrophilic porous filtration membrane, which comprises forming a homogeneous blended solution of solutes comprising polyethersulfone resin, poly-2-oxazoline resin, and polyvinylpyrrolidone resin in a compatible solvent, forming the resulting solution in a film, quenching the film in a quenching medium, and drying the resulting film.
Dependencies are inferred from the claim text.