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Antimicrobial compositions useful for medical applications

  • US 5,662,913 A
  • Filed: 07/01/1994
  • Issued: 09/02/1997
  • Est. Priority Date: 04/10/1991
  • Status: Expired due to Fees
First Claim
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1. In a foam composition comprised of a foam matrix which is dermatologically acceptable, moisture vapor-permeable, resistant to dissolution when exposed to water, and further comprising an antimicrobial composition,the improvement wherein said antimicrobial composition is the antimicrobial composition consisting essentially of(a) a stabilizing acyclic polyether polymer;

  • (b) silver ion; and

    (c) a stabilizing anion, wherein said anion is selected from the group consisting of chloride, bromide, iodide and thiocyanate, wherein the ratio of equivalents of said anion to equivalents of said silver ion is greater than 4 to 1, when said anion is chloride;

    is greater than 2.1 to 1, when said anion is bromide; and

    is greater than 1.1 to 1, when said anion is iodide;

    is greater than 3.5 to 1 when said anion is thiocyanate; and

    wherein said antimicrobial composition has long-term photostability of greater than 72 hours in direct sunlight.

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