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LightSpan® LS-6140

1 of 22 products in this brand
LightSpan® LS-6140 is a low viscosity elastomer.

Polymer Name: Silicone Elastomer

Processing Methods: Casting, Injection Molding

Features: Good Thermal Stability, High Performance, Low Moisture Absorption, Low Outgassing, Low Shrinkage, UV Resistant

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Identification & Functionality

Chemical Family
Polymer Name
Technologies

Features & Benefits

Product Highlights
  • Two-part, optically clear silicone system
  • Based on a methyl silicone polymer
  • Low viscosity
  • 1:1 Mix Ratio (Part A:B)

Applications & Uses

Plastics & Elastomers Processing Methods
Applications
  • For bonding, casting or injection molding of high performance optical components
  • For applications requiring index matching at 1.40
  • For photonics applications requiring low outgassing and minimal volatile condensables to avoid condensation in sensitive devices
Instructions for Use

Mixing

Thoroughly mix in a convenient 1:1 mix ratio by weight prior to use.

Vacuum Deaeration

Remove air entrapped during mixing by common vacuum deaeration procedure, observing all applicable safety precautions. Slowly apply full vacuum to a container rated for use and at least four times the volume of the material being deaerated. Hold vacuum until bulk deaeration is complete.

Substrate Consideration

Cures in contact with most materials. Exceptions include butyl and chlorinated rubbers, some RTV silicones and unreacted residues of some curing agents.

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
Viscosity3,125 (3,125 )cP (Mpa*s)
Durometer Type A50.0
Tensile850 (5.86 )psi (MPa)
Elongat ion90.0%
Cte400.0ppm/°C
Dielectric Strength520 (20.28 )volts/mil (kV/mm)
Ionic Content Clmax. 5ppm
Ionic Content Kmax. 2ppm
Ionic Content Namax. 4ppm
Lap Shear200 (1.38 )psi (MPa)
Mix Rat io0.042361111
Refractive Index1.4
Specific Gravity1.02
Tack Free Time6.0hours
Volume Resistivity1.10E+15ohmcm
Work Time3.0hours
Cured Properties
ValueUnitsTest Method / Conditions
Cure SystemPlatinum
Cure at 150 °C15.0minutes

Packaging & Availability

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