×

Solid state conductive polymer compositions, biomedical electrodes containing such compositions, and method of preparing same

  • US 5,385,679 A
  • Filed: 07/30/1993
  • Issued: 01/31/1995
  • Est. Priority Date: 11/15/1991
  • Status: Expired due to Term
First Claim
Patent Images

1. A solid state conductive polymer composition comprising:

  • (a) an ionically conductive polymer electrolyte complex formed by a process where the complex is effectively dehydrated by essentially evaporating the water, and(b) an essentially non-volatile plasticizersaid polymer electrolyte complex comprising a solid solution of an ionic salt dissolved in a solvating polymer wherein the complex is ionically conductive after processing;

    said solvating polymer comprising crosslinked poly(N-vinyl lactam) present in the composition in an amount of from about 5 to about 50 weight percent of the composition;

    said plasticizer comprising a polyhydric alcohol present in the composition in an amount of from about 50 to about 95 weight percent of the composition;

    said ionic salt present in the composition in an amount sufficient to interact with non-carbon atoms of the solvating polymer;

    wherein the composition maintains its glass transition properties notwithstanding exposure to ambient air conditions for at least two weeks and wherein the solid solution functions as an ionically conductive medium after the at least two weeks.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×