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LightSpan® LS1-6941

1 of 22 products in this brand
LightSpan® LS1-6941 is a optical thermoset.

Product Type: Adhesive, Encapsulant

Chemical Family: Silicones

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Knowde Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Product Highlights
  • Two-part, pourable, optically clear, silicone
  • 1:1 Mix Ratio (Part A:B)

Applications & Uses

Applications
  • Use in the injection and transfer molding of optical components
  • As an adhesive or encapsulant for applications requiring index matching at 1.41
Instructions for Use

Mixing

Thoroughly stir individual parts prior to addition to ensure a homogenous mixture. Mix Parts A and B in a 1:1 ratio.

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.

Note: Some bonding application may require the use of a primer. NuSil Technology CF1-135 silicone primer is recommended.

Substrate Consideration

LS1-6941 will cure in contact with most materials common to biomedical assemblies. Exceptions include sulfur-cured organic rubbers, latex, 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
Viscosity62,500 (62,500 )cP (Mpa*s)
Durometer Type A50.0
Tensile750 (5.17 )psi (MPa)
Elongat ion305.0%
Mix Rat io0.042361111
Refractive Index1.41
Specific Gravity1.03
Tear80 (14.11 )ppi (kN/m)
Work Time24.0hours
Cured Properties
ValueUnitsTest Method / Conditions
Cure SystemPlatinum
Cure at 150 °C30.0minutes

Packaging & Availability

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