Composite membrane having oleophobic properties

Details Composite membrane having oleophobic properties Composite membrane having oleophobic properties

C - Chemistry, Metallurgy

08

J

C08J 9/00 (2006.01) C08J 7/04 (2006.01) C08J 9/36 (2006.01)

Patent

CA 2555422

An air permeable composite article (12) that in one embodiment includes a porous base membrane (16) that includes a plurality of nodes (22) and fibrils (24) defining a plurality of interconnecting pores (26) extending through the porous base membrane with each node and fibril having a surface. The composite article also includes a precipitated coating material (28) deposited on the surfaces of the plurality of nodes and fibrils. The coating material includes a copolymer formed from a fluorinated acrylate or methacrylate, an n-alkyl acrylate or methacrylate, and an isocyanate crosslinker. The precipitated coating material provides oil and contaminating agent resistance of at least a number six measured in accordance with AATCC 118 test method.

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