Membrane and process for producing the membrane
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United States of America Patent
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-
Jun 19, 1990
Issued Date -
N/A
app pub date -
Dec 5, 1986
filing date -
Nov 16, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A membrane for hemodialysis is prepared by casting, extruding or spinning a solution of a polyether-polycarbonate block copolymer and a swelling agent having a molecular weight of about 1,000 to about 20,000 Daltons, then partially evaporating the solvent, gelling and washing. The membrane has a top cut-off value less than about 68,000 Daltons, and hence is substantially impermeable to albumin, but nonetheless provides high permeability to water and to other small molecules.
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