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US 5,290,448 AGranted
Polyacrylonitrile membrane
AssigneeAkzo N.V.
InventorsHeinz-Dieter Sluma, Jurgen Passlack, Harald Schmitt, Walter Loffelmann, Karl Henke
Life of this patent
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Abstract
An asymmetric semipermeable membrane for dialysis and/or ultrafiltration is composed of a copolymer of acrylonitrile and acrylic ester and an ionic or ionizable monomer in the form of a hollow fiber. The copolymer is composed of 90.50 to 95.00 wt. % acrylonitrile, 4.99 to 8.60 wt. % acrylic ester, and 0.01 to 0.90 wt. % of the ionic or ionizable monomer. Also provided is a process for its manufacture.
Claims21
An asymmetric semipermeable membrane for dialysis or ultrafiltration comprised of:
- a copolymer of acrylonitrile and acrylic ester and an ionic or ionizable monomer in the form of a hollow fiber defining a cavity, said copolymer having properties for enabling substantial avoidance of bradykinin generation and being comprised of 90.50 to 95.00 wt. % acrylonitrile, 4.99 to 8.60 wt. % acrylic ester, and 0.01 to 0.90 wt. % of ionic or ionizable monomer.
Dependencies are inferred from the claim text.