| 摘要 |
PURPOSE:To obtain a thin uniform membrane excellent in gas permeability and useful for enriching oxygen, by applying a liquid siloxane compound curable by the irradiation of radioactive rays to a porous support and crosslinking and curing the surface of the coating layer by the irradiation of radioactive rays. CONSTITUTION:A siloxane compound having one or more of a vinyl group, an acrylic ester group or an acrylamide group at the terminal thereof is used and applied to a porous support having chemical resistance and heat resistance. After coating, the coating layer is irradiated with electron beam within such a range that acceleration voltage is 170-300kV and an irradiation dose is 1-20Mrad. Polymerization reaction easily advances by irradiation to be formed into a film. If the irradiation dose is controlled, a membrane 2 with an arbitrary thickness is obtained. It is pref. that the excessive siloxane compound penetrated in the open pore parts of the porous support is removed by solvent extraction because the thickness of the membrane can be reduced.
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