C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
18/32, 117/88.5
C08J 9/40 (2006.01) B01D 67/00 (2006.01) B01D 71/42 (2006.01) C08F 8/00 (2006.01) C08J 5/22 (2006.01)
Patent
CA 1186860
Porous, modified polyacrylonitrile-containing membranes suitable for ultrafiltration, processes for their preparation and their use Abstract Modified, polyacrylonitrile-containing membranes suitable for ultrafiltration are prepared by reacting polyacrylonitrile or co- polymers of acrylontrile and other ethylenically unsaturated mono- mers with, successively, hydroxylamine, at least difunctional com- pounds, which act as bridge members, e.g. cyanuric chloride, a poly- functional oligomer or polymer, e.g. polyethyleneimine, and, finally, a reactive compound containing at least one ionic group, e.g. an anionic reactive azo dye. The latter compound must be able to react with the polyfunctional oligomer or polymer and is required only if the said polymer does not already itself contain ionic groups. The novel membranes show good mechanical, temperature and pH-stabilities and are suitable, for example for separating salts from organic com- pounds (dyes) or in waste-water treatment.
360494
Linder Charles
Perry Mordechai
Aligena Ag
Gowling Lafleur Henderson Llp
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