Patent ID: 8075669
Filing Date: 2011-12-13
Classification: B01D,Y10T

Abstract:
1. A venting apparatus having an opening for venting gas from an enclosure or receptacle, said venting apparatus including a porous gas-permeable venting composite comprising: (a) a porous polymeric structure having a structure defining a plurality of pores extending therethrough and with at least one outer surface; (b) a coating covering at least a portion of said outer surface of the porous polymeric structure, wherein the porous polymeric structure with the coating is porous and gas-permeable; (c) said coating comprising at least a first and a second component; (d) said first component comprising oleophobic and hydrophobic fluorinated material; and (e) said second component comprising a perfluoropolyether (PFPE), said PFPE comprising the following end-groups: wherein the weight ratio between the first and the second component in the formed coating is within the range of 1 weight part of the first component to 0.01-100 weight parts of the second component.