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Biocompatible polyurethane devices wherein polyurethane is modified with lower alkyl sulfonate and lower alkyl carboxylate

  • US 5,017,664 A
  • Filed: 04/05/1989
  • Issued: 05/21/1991
  • Est. Priority Date: 06/03/1987
  • Status: Expired due to Fees
First Claim
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1. A biocompatible device having at least one surface which includes a polyether-polyurethane copolymer based on a mole ratio of about 1.5/0.5/1.0 to about 10/9/1 of an organic diisocyanate, a C2 -C14 alkyl or aryl diol or diamine and a polyol having a number average molecular weight from about 500 to about 3000, the copolymer being modified wherein about 5 to about 25 percent of the urethane hydrogen atoms are replaced with a combination of lower alkyl (C1 -C6) sulfonate groups and lower alkyl (C1 -C6) carboxylate groups.

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