B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
117/88.5
B01D 67/00 (2006.01) C08J 9/40 (2006.01)
Patent
CA 1275207
ABSTRACT OF THE DISCLOSURE A hydrophilized membrane of a porous hydrophobic material having micropores each defined by a surface at least part of which is coated with a hydrophilizing agent which is solid at about 20°C and substantially insoluble in water. The hydrophilizing agent is preferably selected from monofatty acid esters of propylene glycol. Also disclosed are processes for hydrophilizing such porous hydrophobic membranes. The process comprises (a) dipping said microporous membrane of a hydrophobic polymer material into a solution of a hydrophilizing agent which is solid at about 20°C and substantially insoluble in water to allow said hydrophilizing agent to adhere to at least a portion of the surface of the membrane; (b) removing said mioroporous membrane of said hydrophobic material from said solution and evaporating the solvent for said hydrophilizing agent; and (c) heating said microporous membrane to a temperature lower than a temperature at which the said hydrophobic polymer material starts to shrink thermally and not lower than the temperature which is 10°C below the melting point of said hydrophilizing agent.
490927
Inoue Michio
Kawashima Kazuto
Tanaka Hisao
Yamamori Hisayoshi
Inoue Michio
Kawashima Kazuto
Kirby Eades Gale Baker
Mitsubishi Rayon Co. Ltd.
Tanaka Hisao
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