AA-BOND F253
High Temp Fiber Optic Epoxy Adhesive ECCOBOND F 253 / Tra-bond F253 Formulation
| Part Number |
Mix Ratio (R:H) |
Operating Temp Range |
Cure Type |
Technology |
| AA-BOND F253 |
100:10 (by weight) |
-60°C to 175°C |
Heat Cure |
Two-Part Epoxy |
✨ Product Features & Benefits
- **Color Keyed:** Changes color during the cure process to indicate cure status (Blue/Green to Reddish-Amber).
- **Low Stress:** Demonstrates low internal stress after curing, ideal for bonding sensitive optical components.
- **Wicking:** Excellent low viscosity and wicking characteristics for penetrating tight joints like fiber optic ferrules.
- **Thermal Resistance:** Excellent resistance to thermal shock across a wide service temperature range.
- **NASA Outgassing:** Meets low outgassing requirements, making it suitable for vacuum applications.
? Uncured Properties
| Property |
Value |
Test Condition |
| Appearance (Resin) |
Light Yellow |
Unmixed |
| Appearance (Mixture) |
Green/Blue |
After Mixing |
| Appearance (Cured) |
Reddish-Amber |
Fully Cured |
| Mixed Viscosity |
1,750 cP |
@ 25°C |
| Pot Life |
1 hour |
25 grams |
| Specific Gravity |
1.2 |
Mixed |
?️ Cured Properties
| Property |
Value |
Test Method |
| Glass Transition Temp (Tg) |
116°C |
|
| Hardness |
88 |
Shore D |
| Lap Shear Strength (Al) |
2,700 psi |
Aluminum to Aluminum |
| Refractive Index |
1.56 |
|
| CTE (Below Tg) |
$62.7 \times 10^{-6} \text{ ppm/°C}$ |
|
| CTE (Above Tg) |
$202 \times 10^{-6} \text{ ppm/°C}$ |
|
| NASA Outgassing (TML) |
0.57% |
|
⏱️ Typical Cure Schedule
| Temperature |
Time |
| 100°C (212°F) |
15 minutes |
| 125°C (257°F) |
5 minutes |
| 150°C (302°F) |
1 minute |
**IMPORTANT NOTE:** For applications where the operating temperature exceeds 150°C, a post-cure of 30 minutes @ 150°C is highly recommended to fully develop the adhesive's properties.
