Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By treating occluded solids
Reexamination Certificate
2007-06-12
2007-06-12
Menon, Krishnan S. (Department: 1723)
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By treating occluded solids
C264S514000, C264S561000, C264S562000, C264S567000, C264S346000, C210S500220, C210S500230, C210S500270, C210S500390, C528S310000, C528S064000
Reexamination Certificate
active
10836049
ABSTRACT:
The preparation and use of novel porous poly(aryl ether) articles is disclosed. The porous articles are prepared from blends of poly(aryl ether) polymers with polyimides by selectively decomposing the polyimide phase. The preferred reagents used to decompose the polyimide phase include monoethanolamine and tetramethylammonium hydroxide. The porous articles can be configured as a single layer or as a multilayer article. The porous articles of the present invention are unique that at least one of the layers exhibits a narrow pore size distribution. The articles of the present invention can be used as a porous media for a broad range of applications, including porous membranes for fluid separations, such as microfiltration, ultrafiltration, and gas separation, as a battery separators, and as a sorption media.
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Menon Krishnan S.
PoroGen Corporation
St. Onge Steward Johnston & Reens LLC
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