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publicationDate 2006-03-28-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber US-7018445-B2
titleOfInvention Polyimide blends for gas separation membranes
abstract The present invention provides a selectively gas permeable membrane that has a superior combination of permeability and selectivity. The membrane composition includes a Type 1 copolyimide uniformly blended with a Type 2 copolyimide, which polymers are defined by chemical structure more specifically in this disclosure. The invention also provides a method of using the membrane of the copolyimide blend to separate components of gas mixtures.
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