Gas separation membranes made from blends of aromatic polyamide, polymide or polyamide-imide polymers
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United States of America Patent
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Sep 28, 1993
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N/A
app pub date -
Sep 2, 1992
filing date -
Sep 2, 1992
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Abstract
The present invention provides for gas separation membranes with superior gas transport properties made from a blend of certain polymers. In particular, certain alkyl substituted aromatic polyimides, polyamides or polyamide-imides are blended with certain aromatic polyimides to provide a gas separation membrane with superior productivity and good selectivity.
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