LM-155 : Optical Coating / Adhesive
LM-155 is a low modulus UV curable coating/adhesive. The material was optimized for curing by both UV LED and UV Mercury lamps. A typical application is re-coating for optical fibers.
LM-155 is characterized by a plasto-elastic behavior. The non-elastic part is important for stress relief and better adhesion. Stress on the interface originates from the shrinkage during polymerization and is found in all polymerizing systems. LM-155 is made to accommodate the interfacial shrinkage effect.
Properties
| Liquid state | |
| RI liquid at 589 nm | 1.530 |
| Density, g/cm3 | 1.12 |
| Viscosity, cps @ 25°C | 2500 |
| Surface tension, dyne/cm | 23 |
| color | Clear, yellowish |
| Cured state | |
| color | Clear, yellowish |
| Transparency 450-1600 nm, 300-micron film | 99% |
| RI cured at 589 nm | 1.550 |
| RI cured at 1550 nm | 1.540 |
| Adhesion to silica, 90° Peel, g/cm | 1200 |
| Secant Modulus @2.5% | 29 |
| Young Modulus, MPa | 50 |
| Tensile Strength, MPa | 8 |
| Elongation to Break | 130 |
The product is supplied pre-filtered to below 1-micron particles.
Storage
- Avoid unnecessary exposure to ambient light and moisture.
- Long term storage should be at ambient conditions of 15-30ºC. Do not refrigerate. The material may show haze below 10ºC. It will clear up upon warming back to ambient conditions.
- The shelf life is 12 months.
Application
Curing can be achieved by any UV source at 300-400nm. Typically, a dose of 500-2000 mJ/cm2 is necessary. Keep the bottle closed at all times when not in use. The material is sensitive to light.
Safety: Refer to the SDS
Note: The above information is believed to be reliable, but it is not to be taken as a representation, warranty, or guarantee. Customers should perform their own QC, QA, and evaluation tests.
Updated: August 22, 2024
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