Thick film compositions for making medical electrodes

Compositions – Electrically conductive or emissive compositions – Free metal containing

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2525203, 2525215, 106 114, 106 119, H01B 122

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active

059285710

ABSTRACT:
The invention is directed to a conductive composition for iontophoretic electrodes comprising, based on solids: (a) 20-90% wt finely divided particles of silver, carbon, graphite and mixtures thereof; (b) 0-75% wt. finely divided particles of silver chloride; (c) 0.25-10% wt. hydrophilic polymer; and (d) 2-15% wt. hydrophobic thermoplastic polymer having a glass transition temperature (Tg) >40.degree. C. The invention is also directed to compositions wherein the binder comprises 5-15% wt. copolymer of hydrophilic and hydrophobic monomers.

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P. Glickfield et al., Pharmaceutical Research, Noninvasive Sampling of Biological Fluids, 6(11), 988-990, 1989.
O. Wong, Iontophoresis: Fundamentals, Cygnus Therapeutic Systems, Redwood City, CA, No Pub. Info.

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