C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
18/27, 117/88.5
C08J 9/28 (2006.01) B01D 67/00 (2006.01) B01D 71/44 (2006.01) B01D 71/56 (2006.01) B01D 71/68 (2006.01) C08L 39/06 (2006.01)
Patent
CA 1225806
ABSTRACT OF THE DISCLOSURE Disclosed are asymmetrical macroporous membranes based on a synthetic polymer comprising a polymeric mixture of 5 to 70% by weight polyvinyl- pyrrolidone having a molecular weight ? 100,000 Dalton and 95 to 30% by weight of a polymer selected from a group consisting of a polysulfone, a polyether sulfone and an aromatic or araliphatic polyamide, each of the percentages by weight being relative to the total weight of the polymeric mixture. The membrane has a water absorbency of at least 11% by weight of water, relative to its total weight, at 100% relative humidity and 25°C. Also disclosed is a process for preparation of the membranes.
417365
Beissel Dieter
Walch Axel
Wildhardt Juergen
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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