Highly asymmetric polyethersulfone filtration membranes

Details Highly asymmetric polyethersulfone filtration membranes Highly asymmetric polyethersulfone filtration membranes

1997-07-08

1999-03-23

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

21050041, 210 1, 264 41, 521180, 521189, C08J 928, B01D 3900, B01D 3914

Patent

active

058860592

ABSTRACT:
Highly asymmetric polyethersulfone membranes prepared from a stable, clear, homogeneous solution or stable colloidal dispersion of polyethersulfone are described. The membranes have a porous skin possessing a high density of skin pores with an average diameter of from about 0.001 micron to about 20 microns. In addition, the membrane has a porous support with an asymmetric region of gradually increasing pore diameters so that the opposite face of the membrane has an average pore diameter that is from about 50 to about 10,000 times the diameter of the skin pores.

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patent: 5444097 (1995-08-01), Tkacik
patent: 5708040 (1998-01-01), Hong et al.
patent: B14629563 (1997-06-01), Wrasidio

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