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专利名称：Highly asymmetric polyethersulfone
filtration membranes
发明人：I-fan Wang申请号：US08/8418申请日：19970708公开号：US05886059A公开日：19990323
摘要：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 anaverage diameter of from about 0.001 micron to about 20 microns. In addition, themembrane has a porous support with an asymmetric region of gradually increasing porediameters so that the opposite face of the membrane has an average pore diameter thatis from about 50 to about 10,000 times the diameter of the skin pores.
申请人：MEMTEC AMERICA CORPORATION
代理机构：Knobbe, Martens Olson & Bear, LLP
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