EPO-TEK® 320 Black Epoxy, Room Temperature Cure (2.5g)

The EPO-TEK^® 320 Thixotropic Optical Epoxy Adhesive is a two-component, low viscosity and optically opaque epoxy designed for optical, medical, and opto-electronic packaging of semiconductor devices and components. It is a widely used fiber optic epoxy. Recommended Cure: 65°C (149°F) for 2 Hours. Available in a 2.5 gram packet.

Features:

• Black, optically opaque epoxy with low viscosity
• Blocks light across the IR and visible spectrum (185–2500 nm)
• Suitable for room-temperature, low-temperature, or elevated-temperature box-oven curing
• Pot life: 1 Hour

Applications:

• Optical:
  • Light-blocking epoxy for VIS and NIR photonics packaging
  • Sensor packaging (including IR detectors in TO-cans)
  • Bonding of lenses, prisms, diodes, and various optical components
  • Adheres well to metals, most plastics, and glass
• Fiber Optics:
  • Sealing or potting fibers into boots, ferrules, and feed-throughs in package walls

Physical Properties:

• Consistency: Slightly thixotropic paste
• Viscosity (23°C): 700 - 1,200 cPs
• Thixotropic Index: 5.7
• Glass Transition Temperature, Tg: ≥ 55°C (degree Celsius); ≥ 131°F (degree Fahrenheit)
• Shore D Hardness: 83
• Coefficient of Thermal Expansion (CTE):
  • Below Tg: 58 x 10^-6 in/in°C
  • Above Tg: 169 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: < 1 % @ 300-2500 nm

See Datasheet for additional properties and application notes