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Asymmetric gel-filled microporous membranes

  • US 20050011826A1
  • Filed: 07/18/2002
  • Published: 01/20/2005
  • Est. Priority Date: 07/20/2001
  • Status: Active Grant
First Claim
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1. An asymmetric membrane comprising a microporous membrane substrate, in at least some of whose pores is contained a crosslinked gel which forms a continuous or substantially continuous layer, the density of the crosslinked gel being greater at or adjacent to a first major surface of the membrane than the density at or adjacent to a second major surface of the membrane.

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