ECCOBOND F123
Harmonization Code : 5906100000 | Adhesive tape of a width not exceeding 20cm
Main features
- Fast Application Cure
- Good Capillary Application
- Thermal Shock Resistance
Product Description
LOCTITE ECCOBOND F 123 is a two-part, heat-cure epoxy adhesive formulated for terminating single- and multi-channel fiber optic connectors and potting glass fibers and fiber optic bundles. The mixed material has a typical viscosity of 4,000 cP at 25°C and a four-hour pot life, supporting controlled wicking into optical assemblies. It uses a 100:10 resin-to-hardener mix ratio by weight and offers cure schedules as fast as one minute at 150°C. The cured adhesive operates from -60 to 175°C and combines mechanical-impact resistance, thermal-shock resistance, and low-stress bonding with no pistoning. Its color-keyed formulation changes from green/blue when mixed to reddish-amber after cure, providing a visible indication of cure status.
Key features
- Fast heat cure: Cure options include five minutes at 100°C, two minutes at 120°C, or one minute at 150°C.
- Low-viscosity wicking: Typical mixed viscosity of 4,000 cP at 25°C supports application within fiber optic assemblies.
- Low-stress optical bonds: Resists mechanical impact and thermal shock while supporting connections without pistoning.
Applications / Suitable for
- Single- and multi-channel fiber optic connector termination
- Fiber optic bundle assembly
- Potting glass fibers
TDS, SDS & Technical Documents
Technical Specifications
Physical Properties
General Properties
Thermal Properties
Additional Information
As-supplied / before-processing properties
Typical values unless stated otherwise. Mixed properties apply after combining resin and hardener at a 100:10 ratio by weight.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Light yellow | — | Unmixed material |
| Appearance | Green/blue | — | Completely mixed material |
| Mix ratio | 100:10 | Ratio | Resin to hardener, by weight |
| Mixed viscosity | 4,000 | cP | At 25°C |
| Specific gravity | 1.2 | — | Mixed material |
| Pot life | 4 | hours | Mixed material |
| Reactive solids content | 100 | % | Typical uncured material property |
After-processing / final-state properties
Typical cured-material and bonded-joint reference values. Results are not guaranteed production specifications or universal joint-design values.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Operating temperature | -60 to 175 | °C | Documented product operating range |
| Glass transition temperature | 120 | °C | Typical cured material |
| Hardness | 87 | Shore D | Typical cured material |
| Refractive index | 1.56 | — | Typical cured material |
| Water absorption | 0.004 | % | Typical cured material |
| Spectral transmittance | 93 | % | Wavelength range of 6,000–9,000 Å |
| Dielectric strength | 400 | V/mil | Typical cured material |
| Lap shear strength | 2,900 | psi | Aluminum-to-aluminum test specimen |
