Non-cracking hydrophilic polyethersulfone membranes
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United States of America Patent
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-
Oct 15, 2002
Grant Date -
Sep 13, 2001
app pub date -
Dec 1, 2000
filing date -
Feb 8, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A non-cracking hydrophilic polyether sulfone membrane is prepared by (a) directly coating the entire surface of a hydrophobic polyethersulfone membrane with an aqueous solution of a polyalkylene oxide polymer and at least one polyfunctional monomer, and (b) polymerizing the monomer over the entire surface of the membrane under conditions which cause the resulting polymer to attach to the polyethersulfone membrane and the polyethylene oxide to form a non-extractable surface which does not crack when the membrane is folded to form a pleated cartridge.
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