EPO-TEK^® 305 Spectrally Transparent Flexible Epoxy, Room Temperature Cure (4g)

The EPO-TEK® 305 Epoxy is a two-component, semi-rigid, optical grade epoxy for semiconductor packaging of fiber optics, optoelectronics and medical devices. It is an electrically and thermally insulating epoxy.

Features:

• Capable of transmitting light in the UV range.
• Low viscosity, water-like epoxy formulation.
• Recommended Cure: 65°C / 1 Hour
• Pot life: 1 Hour

Physical Properties:

• Consistency: Pourable liquid
• Viscosity (23°C): 150 - 250 cPs
• Glass Transition Temperature, Tg: ≥ 35°C (degree Celsius); ≥ 95°F (degree Fahrenheit)
• Shore D Hardness: 66
• Coefficient of Thermal Expansion (CTE):
  • Below Tg: 31 x 10^-6 in/in°C
  • Above Tg: 148 x 10^-6 in/in°C
• Suggested Operating Temperature: < 200 °C (Intermittent); < 392°F  

Optical Properties:

• Spectral Transmission:
  • > 67% @ 260 nm
  • > 95% @ 340 nm
  • > 98% @ 400 - 1600 nm
• Refractive Index: 1.4763 @589 nm

See Datasheet for additional properties and application notes