Method for production of solution-diffusion membranes and their application for pervaporation
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United States of America Patent
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Sep 12, 1989
Grant Date -
N/A
app pub date -
Dec 29, 1986
filing date -
Apr 26, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
For producing solution/diffusion membranes, homogeneous dense films prepared by melt extrusion or casting from synthetic polymers, having a melting temperature above 140.degree. C., a glass transition temperature above 0.degree. C. and long time stability against boiling ethanol are irradiated with accelerated electrons and submitted to a subsequent radical graft copolymerization. After graft polymerzation, the functional groups are converted into the dissociated salts.
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