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Siloxane-grafted membranes

  • US 4,877,528 A
  • Filed: 10/27/1988
  • Issued: 10/31/1989
  • Est. Priority Date: 10/27/1988
  • Status: Expired due to Fees
First Claim
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1. A siloxane-grafted cellulosic semipermeable composite membrane comprising chemical structure for providing a substantially constant flux as a function of time, consisting essentially of non-crosslinked covalently bonded reaction product of hydroxyl-reactive functional groups of a polysiloxane with hydroxyl groups of an asymetric cellulosic semipermeable membrane, wherein said hydroxyl-reactive functional groups are selected from acid halides, aminoacid halides, sulfonyl halides, and phosphoryl halides.

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