Process for the production of hydrophilic membranes
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United States of America Patent
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Aug 6, 1996
Issued Date -
N/A
app pub date -
Dec 30, 1994
filing date -
Mar 19, 1993
priority date (Note) -
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Abstract
A process for the production of hydrophilic membranes using at least one hydrophobic polymer and polyvinyl pyrrolidone as a hydrophilic polymer, membrane-forming shaping of the polymers and immobilization of the polyvinyl pyrrolidone is characterized in that the polyvinyl pyrrolidone is immobilized on and/or in the membrane by treatment with an aqueous solution of peroxodisulphate in a hot condition. The solution of peroxodisulphate is kept substantially free of oxygen during immobilization by degassing the solution. The membranes are used for hemodialysis, hemodiafiltration and hemofiltration of blood.
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