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Low Expansion Epoxy
Adhesives
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- LCA-4: Instrument Grade adhesive. Low coefficient
of thermal expansion and meets NASA outgassing
requirements.
- LCA-4LV: Similar to Adhesive LCA-4 except longer
pot life and lower viscosity. Meets NASA outgassing
requirements.
- LCA-9: Lowest coefficient of thermal expansion
adhesive. Meets NASA outgassing requirements.
- LCA-48: Filled version of Adhesive FA-48 for
lower thermal expansion for high temperature applications.
Meets NASA outgassing requirements.
| Recommended
Mixing and Handling Parameters |
| Adhesive |
LCA-4 |
LCA-4LV |
LCA-9 |
LCA-48 |
| Activator |
BA-5 |
BA-5 |
BA-5 |
BA-105 |
| Activator
Required, parts by weight per hundred of adhesive |
4.5 |
4.5 |
4.5 |
5.1 |
| Mixed
Viscosity at 77°F, poise |
5300 |
3000 |
Paste |
3040 |
| Work
Life at 77°F, minutes |
60 |
100 |
90 |
200 |
| Recommended
Cure, hr/°F |
2/200 |
2/200 |
2/200 |
2/212
+ 2/375 |
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Typical Cured Properties
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| Color |
Light
green |
Light
green |
Green
tan |
Black |
| Specific
Gravity |
1.86 |
1.86 |
1.72 |
1.75 |
| Hardness,
Shore D |
92 |
91 |
93 |
95 |
| Bond
Strength to aluminum at 77°F, psi |
2400 |
2300 |
2200 |
2000 |
| Flexural
Strength at 77°F, psi |
12,000 |
12,000 |
16,000 |
16,000 |
| Flexural
Modulus at 77°F, 106 psi |
1.6 |
1.6 |
1.91 |
1.30 |
| Water
Absorption (24 hour immersion) at 77°F, % |
-0.01 |
+0.010 |
0.04 |
0.09 |
| Glass
Transition Temperature by DSC, °F |
184 |
175 |
183 |
380 |
| Coefficient
of Thermal Expansion from -65°F to 77°F, 10-6/°F |
15 |
15 |
12 |
14 |
| Volume
Resistivity at 77°F, ohm-cm |
1016 |
1013 |
- |
1014 |
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Click Technical Data Sheet Number
to
receive complete product information
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