Creative Materials 125-21

125-21 is a silver/silver chloride, one component, chemically resistant, medical electrode epoxy ink and coating suitable for application by screen-printing. This product features excellent adhesion to polyimide, polyester, polycarbonate, glass, and a variety of other substrates. Unlike conventional conductive materials, this product is very resistant to methyl ethyl ketone (MEK) and acetone as well as many other chemistries. It is also very resistant to scratching and creasing. Some applications for 125-21 include, but are not limited to, polymer thick film circuitry, trans-dermal drug delivery, ECG and EKG electrodes, defibrillator pads, tens electrodes and muscle stimulator electrodes. 125-21 is formulated to be screen-printed but can also be syringe dispensed, dipped and sprayed. The last two methods require dilution.

Features

  • Excellent Print Definition
  • High Electrical Conductivity
  • High Temperature Resistance
  • Chemically Resistant
  • Excellent Adhesion
  • Long Screen Life
  • Chemically resistant electrode ink

Application Area: Circuit Substrates, Defibrillator Pads, Medical Electrodes

Features: Chemical Resistant, Creasing Resistance, Electrically Conductive, Good Adhesion, Good Scratch Resistance, Good Thermal Stability, High Hydrolytic Stability, High Temperature Resistance, Long Screen Life, Printability

Application Method: Dip Coating, Injection, Screen Coating, Spray

Chemical Family: Epoxy & Epoxy Derivatives

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Features & Benefits

Applications & Uses

Cure Method
Application Method
  • Screen-print

Properties

Typical Properties
ValueUnitsTest Method / Conditions
Conductivity0.02
Viscosity18000cps
FillerSilver
Percent Silver (cured)78
Volume Resistivity0.0001Ω - cm
Sheet Resistivity0.02Ω/sq/mil
Hydrolytic StabilityExcellent
Useful Temperature Range-55 to 200ºC
Thermal StabilityGood to 325°C
Ag/AgCl Ratio65:35
Specific Gravity (water = 1)2.92

Regulatory & Compliance

Certifications & Compliance

Safety & Health

Safety & Handling
  • Use with adequate ventilation.
  • Keep away from sparks and open flames.
  • Avoid prolonged contact with skin and breathing of vapors.
  • Wash with soap and water to remove from skin.
  • Refer to MSDS for additional safety precautions prior to using this product.

Storage & Handling

Shelf Life
6 months at 5°C, 12 months at -10°C, 3 months at 25°C
Suggested Handling & Curing

125-21 is ready to use as supplied. Further thinning may be accomplished by adding small amounts of CMI Thinner # 102-03 and/or Thinner # 113-12. Prior to using, be certain to re-suspend silver. Best properties, for most applications, result when cured for 45 minutes at 165ºC or 30 minutes at 175ºC or 2 hours at 125°C. End user is advised to experimentally determine temperature and time best suited for individual applications. Metal screens and utensils should be avoided when working with this ink. Silver Chloride will react with some metals.

Shelf Life

3 months at 25°C; or 6 months at 5°C or 12 months at -10°C. 125-21 is light sensitive. Prolonged exposure to light should be avoided.