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LightSpan® LS2-6941

1 of 22 products in this brand
LightSpan® LS2-6941 is a optically clear silicone elastomer.

Processing Methods: Encapsulating, Potting

End Uses: Displays, Electrical Components, LEDs

Features: Enhanced Physical Properties, Good Electrical Properties, Good Thermal Stability, Low Moisture Absorption, Low Outgassing, Low Shrinkage, Low Viscosity, Solventless, UV Resistant

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Identification & Functionality

Chemical Family
Technologies

Features & Benefits

Product Highlights
  • Two-part, optically clear, solvent free, low viscosity silicone
  • Cures at room temperature or rapidly with heat
  • Offers good physical and electrical stability across a broad range of temperatures
  • 1:1 Mix Ratio (Part A:B)

Applications & Uses

Cure Method
Plastics & Elastomers End Uses
Plastics & Elastomers Processing Methods
Applications
  • To provide protection of electronic components and assemblies against shock, vibration, moisture, ozone, dust, chemicals and other environmental hazards by potting or encapsulating
  • For photonics applications such as HBLEDs, photo detectors, lasers, discrete optics and flat panel displays that require a 1.41 refractive index
Instructions for Use

Mixing

Mix in a 1:1 ratio Part A to Part B, taking care to minimize air entrapment during mixing.

Vacuum Deaeration

Removed air entrapped during mixing by common vacuum deaeration procedure, observing all applicable safety precautions. Slowly apply vacuum, up to 28 inches Hg, to a container rated for use and of volume at least four times that of material being deaerated. Hold vacuum until presence of air is no longer evident.

Substrate Considerations

Cures in contact with most materials common to electronic assemblies. Exceptions include butyl and chlorinated rubbers, some RTV silicones and unreacted residues of some curing agents. Units being encapsulated or potted should be clean and free of surface contaminants. Containers and dispensers being used should also be clean and dry. Cure inhibition can usually be prevented by washing all containers with cleaning solvent or volatilizing the contaminants by heating. Note: Some bonding applications may require the use of a primer. NuSil Technology LS1-3200 silicone primer is recommended.

Adjustable Cure

Schedule Product cures at a wide range of cure times and temperatures to accommodate different production needs.

Properties

Typical Properties
ValueUnitsTest Method / Conditions
Viscosity1,100 (1,100 )cP (Mpa*s)-
Durometer Type A30.0--
Tensile120 (0.83 )psi (MPa)-
Elongat ion100.0%-
Cte337.0ppm/°C-
Dielectric Strength600 (23.4 )volts/mil (kV/mm)-
Ionic Content Clmax. 5ppm-
Ionic Content Kmax. 5ppm-
Ionic Content Namax. 10ppm-
Mix Rat io0.042361111--
Refractive Index1.41--
Volat ile Content0.7%-
Volume Resistivity1.00E+14ohmcm-
Work Time5.5hours-
Cured Properties
ValueUnitsTest Method / Conditions
Cure SystemPlatinum--
Cure at 150 °C30.0minutes-

Packaging & Availability

Regional Availability
  • Asia Pacific
  • Europe
  • Latin America
  • North America