SiSiB® LR9198 is a low viscosity two-component addition type thermosetting high transparency optical encapsulant. SiSiB® LR9198 has good fluidity, good dielectric properties and high transparency.
High light transmittance
Good yellowing resistance
Good fluidity
Different curing temperatures
Good dielectric properties
Item | Unit | Result |
One or Two part | Two | |
Color | A: Colorless | |
B: Colorless | ||
Viscosity | mPa.s | A: 995 |
B: 5098 | ||
Viscosity (Mixed) | mPa.s | 3015 |
Heat Cure Time at 120°C | min | 10 |
Working Time 25°C | hour | 4 |
TC10 | s | 14 |
TC90 | s | 172 |
Hardness (Cured) | Shore A | 43 |
Density (Cured) | g/cm3 | 1.0318 |
Transmittance | % | 94 |
Tensile Strength | MPa | 5 |
Breaking Elongation | % | 125 |
SiSiB® LR9198 is widely used in LED lighting encapsulantion, power supplies, sensors, industrial controls, transformers, amplifiers, high voltage resistors, relays and solar cell encapsulation.
Silicone encapsulation materials usually require a primer in applications where bonding is required. Primer should be applied in a very thin, even coat and then wiped off after application. Apply silicone elastomer after the primer has fully cured.
SiSiB® LR9198 silicone encapsulants may be either room temperature (25°C/77°F) or heat cured. Room temperature cure encapsulants may also be heat accelerated for faster cure.
The curing reaction begins during the mixing process. Initially, curing is manifested by a gradual increase in viscosity, followed by gelation and conversion to a solid elastomer. Tools for taking components A and B should be separated or wiped clean before use to avoid mixing the two components and causing local agglomeration and inability to use them normally.
At 25°C, the safe storage period of A/B after full mixing is 1 day. The higher the temperature, the shorter the storage time.
When using, avoid contact between rubber and compounds containing N, S, P and Sn elements, otherwise it will cause insufficient or incomplete vulcanization.
The optimal ratio of components A/B is 1:10. Too large or too small ratio will affect the final performance effect of the product.
SiSiB® LR9198 is supplied in 20Kg pail or 200Kg drum.
In the unopened original container SiSiB® LR9198 has a shelf life of 6 months in a dry and cool place.