Melt-spun polysulfone semipermeable membranes and methods...

Details Melt-spun polysulfone semipermeable membranes and methods... Melt-spun polysulfone semipermeable membranes and methods...

2006-12-05

2006-12-05

Fortuna, Ana (Department: 1723)

Liquid purification or separation

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Material

C210S500220, C210S500420, C210S500270, C210S500230, C264S041000, C264S048000, C264S049000

Reexamination Certificate

active

07144505

ABSTRACT:
The present invention provides, inter alia, a composition useful for producing a homogeneous, semipermeable membrane, the composition comprising a polysulfone semipermeable membrane, the polysulfone semipermeable membrane comprising a mixture of: an ultra-high-molecular-weight hydrophilic polymer, a polysulfone compound and a solvent for the polysulfone compound, and the polysulfone semipermeable membrane having a homogeneous structure such that the polysulfone semipermeable membrane has a substantially uniform structure. Another aspect of this invention discloses methods for fabricating semipermeable membranes by homogeneously mixing the composition, melting the composition, and melt-spinning the molten composition. Another aspect of the present invention includes homogeneous, melt-spun, semipermeable membranes useful for liquid separation processes, such as, but not limited to, microfiltration, ultrafiltration, dialysis, and reverse osmosis.

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ASTM Designation: D 1238-99, Standard Test method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer, pp. 1-10, Apr. 2000.

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