Fibrous webs useful for making electret filter media
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United States of America Patent
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Oct 19, 1999
Issued Date -
N/A
app pub date -
Dec 2, 1997
filing date -
Aug 14, 1995
priority date (Note) -
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status (Latency Note)
Importance
Abstract
Fibrous webs comprising a blend of a thermoplastic resin and at least one compound or oligomer which is ##STR1## wherein R.sub.f is a perfluorinated moiety which may contain one or more catenary ether oxygen atoms, Q is a linking group selected from alkylene groups having 1 or 2 carbon atoms, sulfonamido groups or combinations thereof, R is an alkyl group, R.sup.1 is a perfluoroalkyl group, R.sup.2 is an alkyl group which may be straight chain or branched and n is a number of from 2 to 40.
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