Gas permeable materials
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United States of America Patent
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Sep 7, 1993
Grant Date -
N/A
app pub date -
Dec 14, 1992
filing date -
Dec 14, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A gas permeable material having continuous pores through it, in which the pore interiors are coated with the reaction product of a) an ester of a perfluoroalkyl alcohol and a poly-basic hydroxyl-containing carboxylic acid, and b) a melamine formaldehyde, urea-formaldehyde, or glycol modified formaldehyde. The material is oleophobic and is useful in filtration applications and in garments.
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