B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
18/15, 18/27, 40
B01D 69/08 (2006.01) B01D 71/40 (2006.01) B01D 71/80 (2006.01)
Patent
CA 1200642
ABSTRACT OF THE DISCLOSURE A membrane for microfiltration, ultrafiltration or dialysis comprises a methyl methacrylate copolymer containing about 0.5 to 10 mol % of a monomer having sulfonate groups, and a methyl methacrylate copolymer containing about 0.5 to 10 mol % of a monomer having quaternary nitrogen-containing groups. It is manufactured by mixing those copolymers, dissolving the mixture in a solvent such as dimethylsulfoxide or dimethylformamide, and form- ing a membrane from a solution of the copolymers by casting or spinning. The membrane is particularly suitable for use in the purification of blood, and its most preferable form is hollow fibers. A method of preparing hollow fibers comprises extruding the copolymer solution through a spinneret having an annular orifice defined by a thin central tube while a liquid or gas is be- ing injected into the central tube, and coagulating the extrusion product.
380976
Nogi Tatsuo
Sonoda Takeshi
Takenaka Shigenori
Tanaka Yoshitaka
Smart & Biggar
Toray Industries Inc.
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