Poly(ethylene chlorotrifluoroethylene) membranes
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United States of America Patent
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Jul 24, 2007
Grant Date -
May 12, 2005
app pub date -
Aug 9, 2004
filing date -
Feb 12, 2002
priority date (Note) -
Expired
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Abstract
Porous polymeric membranes including Halar (poly (ethylene chlorotrifluoroethylene)) and related compounds and the methods of production thereof which avoid the use of toxic solvents. Preferred solvents, coating agents and pore forming agents are citric acid ethyl ester or glycerol triacetate. The membranes may be in the form of a hollow fiber or flat sheet, and may include other agents to modify the properties of the membrane, such as the hydrophilic/hydrophobic balance. Leachable agents may also be incorporated into the membranes.
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