Membrane and process for the production thereof
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United States of America Patent
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Mar 28, 1995
Grant Date -
N/A
app pub date -
Jun 1, 1993
filing date -
Jun 12, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Membranes composed of sulphonated polyaryl ether sulphones are disclosed in which the repetitive polymer units have the formula ##STR1## in which the aryl radicals are substituted by SO.sub.3 X where X is hydrogen or an alkali metal and the polymer includes from about 0.3 to 0.6 SO.sub.3 X radicals per unit. Processes for producing these membranes are also disclosed.
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