C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
18/24, 182/15.3
C08J 9/28 (2006.01) B01D 67/00 (2006.01) B01D 71/34 (2006.01) B01D 71/38 (2006.01)
Patent
CA 1132312
ABSTRACT OF THE DISCLOSURE A process for preparing a membrane, which process comprises preparing a polymer-casting solution, casting a thin film of the casting solution, curing the cast film for a pre- determined period of time and contacting the cast cured film with a leaching liquid to provide a membrane, the improvement which comprises: providing a casting solution which comprises a vinylidene fluoride polymer and from about 35 to about 85% by weight of a vinyl acetate polymer ; and hydrolyzing the acetate polyomer after leaching, to provide an improved membrane having good mechanical strength and hydrophilic properties.
341298
Jakabhazy Stephen Z.
Zeman Leos J.
Abcor Inc.
Swabey Ogilvy Renault
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