Biomedical electrodes containing solid state conductive polymer compositions
First Claim
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1. A biomedical electrode, comprising:
- (a) a conductive medium comprising a solid state conductive polymer composition; and
(b) means for electrical communication interacting between said conductive medium and electrical equipment;
wherein the solid state conductive polymer composition comprises(a) an ionically conductive polymer electrolyte complex formed by a process where the complex is effectively dehydrated by essentially evaporating water, and(b) optionally if the complex is not cohesive and pliable, an essentially non-volatile plasticizer present in an amount sufficient to render the composition cohesive and pliable;
said 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 is selected from the group consisting of crosslinked poly(N-vinyl lactam);
crosslinked polyacrylamide and its ionic forms;
crosslinked polyacrylic acid and its salts;
crosslinked poly(2-acrylamide-2-methylpropane sulfonic acid), its salts, crosslinked copolymers of the acid, crosslinked copolymers of salts of the acids, or mixtures thereof; and
combinations thereof.
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Abstract
Solid state conductive polymer compositions which are ionically-conductive regardless of the amount of water present in the composition are disclosed. The compositions have solvating polymer, ionic salt, and optionally if the composition is not cohesive and pliable, essentially non-volatile plasticizer in an amount sufficient to render the composition cohesive and pliable. Biomedical electrodes having means for electrical communication contacting the compositions are also disclosed. Methods of making the compositions and electrodes are also disclosed.
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11 Claims
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1. A biomedical electrode, comprising:
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(a) a conductive medium comprising a solid state conductive polymer composition; and (b) means for electrical communication interacting between said conductive medium and electrical equipment; wherein the solid state conductive polymer composition comprises (a) an ionically conductive polymer electrolyte complex formed by a process where the complex is effectively dehydrated by essentially evaporating water, and (b) optionally if the complex is not cohesive and pliable, an essentially non-volatile plasticizer present in an amount sufficient to render the composition cohesive and pliable; said 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 is selected from the group consisting of crosslinked poly(N-vinyl lactam);
crosslinked polyacrylamide and its ionic forms;
crosslinked polyacrylic acid and its salts;
crosslinked poly(2-acrylamide-2-methylpropane sulfonic acid), its salts, crosslinked copolymers of the acid, crosslinked copolymers of salts of the acids, or mixtures thereof; and
combinations thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification