Separation membrane comprising polyethersulfone, process for producing thereof, and dope solution for membrane production
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United States of America Patent
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Aug 13, 2013
Grant Date -
Nov 25, 2010
app pub date -
Sep 30, 2008
filing date -
Oct 19, 2007
priority date (Note) -
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Abstract
A dope solution for membrane production comprising polyethersulfone having high strength, high water permeability, a high rejecting ability and excellent contamination resistance, a separation membrane, and a process for producing the separation membrane are provided. The dope solution for membrane production contains a polyethersulfone and a solvent for thermally induced phase separation selected from the group consisting of 3-pyridinemethanol, 4-methyl-1,3-dioxolane-2-one, 4-benzylpiperidine, trimethyl phosphate, 1,3-dioxolane-2-one and mixtures thereof.
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