Method of impregnating a porous polymer substrate
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United States of America Patent
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-
Aug 7, 2001
Grant Date -
Jun 14, 2001
app pub date -
Dec 19, 2000
filing date -
May 30, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A method of treating a substrate comprises contacting a surface of said substrate, with a pressurized fluid comprising carbon dioxide and a surface treatment component, the surface treatment component being entrained in the pressurized fluid and contacting the surface so that the surface treatment component lowers the surface tension of the surface of the substrate and treats the substrate. The contacting step is preferably carried out by immersion, the fluid is preferably a liquid or supercritical fluid, the substrate is preferably a metal or fabric substrate, and the surface treatment component is preferably a fluoroacrylate polymer.
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