EPO-TEK® OG198-55 Electrically and Thermally Insulating Epoxy, UV & Heat Cure (2oz)

The EPO-TEK^® OG198-55 Shadow Curable UV Epoxy is a high viscosity, single-component, electrically and thermally insulating, translucent UV-cure epoxy. It is the more thixotropic version of EPO-TEK OG198-54. Available in a 2 oz kit.

Features:

• High-Tg, translucent UV-cure epoxy
• Electrically and thermally insulating
• Strong transmission above 560 nm
• Shadow-curable formulation supports UV cure with enhanced performance after a thermal post-cure, enabling significant cure propagation into shadowed areas

Applications:

• Active alignment of optics
• Bonding fibers to V-grooves
• Fiber pigtails
• Medical devices
• Alignment in optoelectronic hybrids: Semiconductor devices
• Semiconductor devices
• General bonding, including structural adhesive in commercial LED lighting

Physical Properties:

• Consistency: Smooth thixotropic paste
• Viscosity (23°C) @ 100 rpm: 1,200-2,000 cPs
• Thixotropic Index: 6.0
• Glass Transition Temperature, Tg: ≥ 120°C (degree Celsius); ≥ 248°F (degree Fahrenheit)
• Shore D Hardness: 85
• Coefficient of Thermal Expansion (CTE):
  • Below Tg: 72 x 10^-6 in/in°C
  • Above Tg: 120 x 10^-6 in/in°C
• Suggested Operating Temperature: < 300 °C (Intermittent); < 572°F
• Particle Size: ≤ 20 microns

Optical Properties @ 23°C (73.4°F):

• Spectral Transmission: ≥ 97% @ 560-1,680nm
• Refractive Index (uncured): 1.5023 @ 589nm
• Refractive Index (cured): 1.5196 @ 589nm

See Datasheet for additional properties and application notes