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LOCTITE® ECCOBOND F 123 – Epoxy adhesive for terminating fiber optic connectors, offering thermal shock resistance and low-stress bonding.

  • Item Name: LOCTITE ECCOBOND F 123
  • Manufacturer: Henkel
  • Product Category: Assembly Adhesive for Fiber Optic Applications
  • Technologies: Epoxy system with color-keyed formulation (two-component mix; resin:hardener ratio 100:10)
  • Applications: Terminating single or multi-channel fiber optic connectors, potting glass fibers, and bonding fiber optic bundles; suitable for most metals, ceramics, glass, and plastics
  • Color: Unmixed: Light yellow; Mixed: Green/Blue; Cured: Reddish-amber
  • Cure Type: Heat cure
  • Package Size: Contact Techniq VN for details.
  • Shelf Life: Contact Techniq VN for details.

1. Product Overview

  • Technology: Epoxy
  • Cure Type: Heat cure
  • Color:
    • Unmixed: Light yellow
    • Mixed: Green/Blue
    • Cured: Reddish-amber
  • Key Benefits:
    • Fast cure, low viscosity, good wicking
    • Tough adhesion to fiber optic and optical materials
    • High impact resistance, excellent thermal shock resistance
    • Low-stress connections, color-coded cure status

2. Applications

  • Primary Use: Fiber optic connectors and assemblies
  • Common Applications:
    • Terminating single or multi-channel fiber optic connectors
    • Potting glass fibers, fiber optic bundles
  • Compatible Substrates:
    • Most metals, ceramics, glass, plastics

3. Typical Properties

Property Value
Uncured Properties
Viscosity @ 25°C 4,000 cP
Specific Gravity (mixed) 1.2
Reactive Solids Content 100%
Pot Life 4 hours
Curing Performance
Cure Schedule 5 min @ 100°C
Alternative Cure 2 min @ 120°C / 1 min @ 150°C
Post Cure (if >150°C) 30 min @ 150°C
Large Mass Gel Phase 4 hrs @ 25°C → 5 hrs @ 100°C
Cured Properties
Glass Transition Temperature (Tg) 120°C
Coefficient of Thermal Expansion 6.31 × 10¹ ppm/°C (Below Tg) / 2.03 × 10² ppm/°C (Above Tg)
Hardness (Shore D) 87
Refractive Index 1.56
Water Absorption 0.004%
Spectral Transmittance (6000-9000 Å) 93%
Mechanical & Electrical Properties
Lap Shear Strength (Al-Al) 2,900 psi
Dielectric Strength 400 V/mil

BERGQUIST microTIM mTIM 1028 Thermal Interface Coating High performance thermal management solution for nickel finished heat sinks, optical transceivers, and data center liquid cooling systems

BERGQUIST microTIM mTIM 1028 is purpose built for riding cage assemblies in servers, switches, and routers, interfacing with electroless nickel plated copper or aluminum heat sinks. It ensures stable operation in high power transceiver modules while also extending applicability to liquid cooling components, heat pipes, and fin based dissipative structures.

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