EPO-TEK® 301-2 Transparent Epoxy, Room Temperature Cure (2.5g)

The EPO-TEK® 301-2 Epoxy is a two-component, room-temperature curing epoxy featuring very low viscosity and excellent optical-mechanical properties. It is designed for optical applications such as lenses for optoelectronic display devices, bonding fiber optics (glass or plastic), and optical filters. EPO-TEK 301-2 can be used for bonding glass, quartz, metals, and most plastics.

Features:

• NASA-approved, low outgassing epoxy
• Recommended Cure: 80°C / 3 Hours
• Pot life: 8 Hours

Physical Properties:

• Consistency: Pourable liquid
• Viscosity (23°C): 225 - 425 cPs
• Glass Transition Temperature, Tg: ≥ 80°C (degree Celsius); ≥ 185°F (degree Fahrenheit)
• Shore D Hardness: 80
• Coefficient of Thermal Expansion (CTE):
  • Below Tg: 61 x 10^-6 in/in°C
  • Above Tg: 180 x 10^-6 in/in°C
• Suggested Operating Temperature: < 300 °C (Intermittent); < 572°F 

Optical Properties:

• Spectral Transmission:
  • ≥ 94% @ 320 nm
  • ≥ 99% @ 400-1,200 nm
  • ≥ 98% @ 1,200-1,600 nm
• Refractive Index: 1.5318 @ 589 nm

See Datasheet for additional properties and application notes