Polymer Systems
Technology Limited

Advanced Engineering

Optoelectronics:
Electronics:

LS1-6140

Potting and Encapsulating Elastomers

Optically Clear Silicone Elastomer

DESCRIPTION

Two-part, optically clear silicone system
Based on a methyl silicone polymer
Low viscosity
1:1 Mix Ratio (Part A:B)
Requires heat to cure

APPLICATION

For bonding, casting or compression molding of high performance optical components
For applications requiring index matching at 1.40
For photonics applications requiring low volatility silicone to avoid contamination

PROPERTIES
Typical Properties	Average Result
Uncured:
Appearance	Colorless and Transparent
Viscosity, Part A	3,450 cP (3,450 mPas)
Viscosity, Part B	2,500 cP (2,500 mPas)
Viscosity, Mixed (V1) within 30 minutes of catalyzation	3,200 cP (3,200 mPas)
Viscosity, Mixed (V2) 24 hours after catalyzation	3,600 cP (3,600 mPas)
Viscosity, (V2/V1) 24 hours after catalyzation	1.1
UV/Visible Spectrophotometry at 400nm	99%T
Cured: 60 minutes at 150°C (302°F)
Specific Gravity	1.02
Durometer, Type A	50
Tensile Strength	900 psi (6.2 MPa)
Elongation	90%
Lap Shear Strength (primed with LS1-3200)	270 psi (1.9 MPa)
Volume Resistivity*	1.3 X 10¹⁵ ohm cm minimum
Dielectric Strength*	630 V/mil (13.8 kV/mm)
Ionic Content, Cl*	< 5ppm
Ionic Content, K*	< 2.5 ppm
Ionic Content, Na*	< 2.5 ppm
Glass Transition Temperature (Tg)*	-115 °C (-175°F)
Coefficient of Linear Expansion (-150 °C to -120°C)*	99 ppm/°C (99µm/(m°C))
Coefficient of Linear Expansion (-100 °C to 100°C)*	330 ppm/°C (330µm/(m°C))
Refractive Index, 589 nm	1.4
Transmittance vs. Wavelength (25°C)	See Profile PDF for Graph
Refractive Index vs. Wavelength (25°C)	See Profile PDF for Graph
Refractive Index vs. Temperature by Wavelength	See Profile PDF for Graph

*These properties NOT tested on a lot-to-lot basis. Please contact NuSil Technology for assistance and recommendations in establishing particular specifications.

Packaging

50 Gram Kit
50 mL SxS Kit
500 Gram Kit
2 Pint Kit (0.91 kg)
2 Gallon Kit (7.28 kg)

Warranty

12 Months