Method of impregnating a porous polymer substrate
AssigneeMicell Technologies, Inc.
InventorsJames B. McClain, Timothy J. Romack, James P. DeYoung
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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.
Claims12
A method of impregnating a solid porous polymer substrate, said method comprising the steps of:
- immersing a portion of said substrate in a pressurized liquid or supercritical fluid comprising carbon dioxide and a treatment component, wherein said surface treatment component comprises a CO2-philic segment, and wherein said CO2-philic segment is selected from the group consisting of fluorine-containing segments, siloxane-containing segments, and mixtures thereof;
- impregnating said surface treatment component in said porous substrate;
- and
- removing said solid porous polymer substrate from said pressurized liquid or supercritical fluid with said treatment component adhered thereto.
Dependencies are inferred from the claim text.