Adhesive composites for biomedical electrodes
First Claim
Patent Images
1. An electrical conductive, pressure sensitive adhesive composite viscoelastic film comprising:
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space="preserve" listing-type="tabular">______________________________________ CHEMICALS PARTS BY WEIGHT ______________________________________ Low molecular weight 25-30 viscoelastic isobutylene polymer (molecular weight range about 50,000-56,000) High molecular weight 5.0-6 viscoelastic isobutylene polymer (molecular weight range about 57,000-68,000) Water receptive polymer 14.7-16.0 Humectant 9.7-11 Preservative 0.30-0.40 Microbialostat 0.15-0.25 Water 25-30 Quartesnary ammonium electrically 25-30 conductive polymer ______________________________________
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Accused Products
Abstract
Electrically conductive, pressure sensitive adhesive composite formulations comprising adhesive polymers, electrically conductive quaternary ammonium polymers, electrically conductive water soluble and water swellable polymeric fillers for imparting cohesiveness to said composite, and additionally, chemical agents that retard oxidative or microbial degradation of the composite. The composite formulations yield a flexible and extensible material that is suitable as an adhesive for biological electrodes, particularly transcutaneous electrical nerve stimulation electrodes.
38 Citations
8 Claims
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1. An electrical conductive, pressure sensitive adhesive composite viscoelastic film comprising:
space="preserve" listing-type="tabular">______________________________________ CHEMICALS PARTS BY WEIGHT ______________________________________ Low molecular weight 25-30 viscoelastic isobutylene polymer (molecular weight range about 50,000-56,000) High molecular weight 5.0-6 viscoelastic isobutylene polymer (molecular weight range about 57,000-68,000) Water receptive polymer 14.7-16.0 Humectant 9.7-11 Preservative 0.30-0.40 Microbialostat 0.15-0.25 Water 25-30 Quartesnary ammonium electrically 25-30 conductive polymer ______________________________________- View Dependent Claims (2, 3)
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4. An electrically conductive, pressure sensitive adhesive composite having a formulation comprising:
space="preserve" listing-type="tabular">______________________________________ [AMOUNTS] CHEMICALS PARTS BY WEIGHT ______________________________________ Polyisobutylene 25-30 (molecular weight range about 50,000-56,000) Polyisobutylene 5.0-6 (molecular weight range about 57,000-68,000) Cross-linked sodium 14.7-16.0 carboxymethylcellulose Pectin 9.7-11 Butylated hydroxytoluene 0.30-0.40 2, 4, 4'"'"'-trichloro-2'"'"'- 0.15-0.25 hydroxydiphenyl ether [Ether 0.15-0.25] Water 25-30 quaternary ammonium 25-30 conductive polymer ______________________________________- View Dependent Claims (5)
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6. A method of making an adhesive composite, comprising the steps of:
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forming a mixture of 25-30 parts by weight of polyisobutylene having a molecular weight of about 50,000-56,000 and 5-6 parts by weight of polyisobutylene having a molecular weight of about 57,000-68,000, these visoelastic polymers being combined in a 6 to 1 ratio respectively; adding 14.7-16.0 parts by weight of water receptive carboxymethylcellulose polymers and 9.7-11 parts by weight of humectants to said mixture;
mixing said mixture for a time sufficient to ensure uniform dispersion of said water receptive carboxymethylcellulose polymers and said humectant with said viscoelastic polymers;adding 0.3-0.4 parts by weight of preservative and 0.15-0.25 parts by weight of microbial static agents to said mixture; mixing said mixture to disperse said preservative and microbial agents throughout said mixture; adding 25-30 parts by weight of water and 25-30 parts by weight of a quaternary ammonium electrically conductive polymer to said mixture, said water and said electrically conductive quaternary ammonium polymer being added to said mixture in four aliquots with about 45 minutes of mixing between each addition; and mixing said mixture until said composite has a doughlike consistency. - View Dependent Claims (7, 8)
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Specification