Thick film compositions for making medical electrodes
AssigneeE. I. Du Pont de Nemours and Company
InventorMan-Sheung Chan
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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.
Claims10
A conductive composition for iontophoretic electrodes comprising, based on solids:
- (a) 20-90% wt. of silver particles;
- (b) 0-75% wt. of silver chloride particles;
- (c) 0.25-10% wt. hydrophilic polymer;
- and
- (d) 2-15% wt. hydrophobic thermoplastic polymer having a Tg above 40.degree. C. said conductive composition further comprising a vehicle consisting of organic solvent or organic solvent mixtures.
Dependencies are inferred from the claim text.