Patent ID: 7815712

Claim:
A mixed matrix membrane comprising a dispersion of polymer stabilized molecular sieves in a continuous polymer matrix wherein said molecular sieves are stabilized by a composition consisting essentially of at least one glassy polymer wherein said polymer is a hydroxyl or amino group-terminated polymer selected from the group consisting of polyethersulfones, sulfonated polyethersulfones, polyethers, polyether ketones, poly(ethylene imine)s, poly(amidoamine)s, and polyetherimides or said polymer is a hydroxyl group-containing glassy polymer selected from the group consisting of poly(vinyl alcohol)s, cellulose acetate, cellulose triacetate, cellulose acetate-butyrate, cellulose propionate, ethyl cellulose, methyl cellulose, and nitrocellulose, and wherein said continuous polymer matrix comprises at least two different glassy polymers.