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LightSpan® LS2-6140

1 of 22 products in this brand
LightSpan® LS2-6140 is a optically clear primerless silicone encapsulant.

Product Type: Encapsulant

Application Area: Electrical Components, LEDs

Compatible Substrates & Surfaces: Aluminum, Ceramic, Metal

Cure Method: Heat Cure

Chemical Family: Silicones

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Identification & Functionality

Chemical Family
Product Type

Features & Benefits

Product Highlights
  • Two Part, Transparent, 1:1 Mix ratio (A:B)
  • Low volatility and high purity
  • High tensile strength, low viscosity
  • REACh and RoHS compliant
  • Tested per UL-94 and passed V-0
  • Requires heat to cure

Applications & Uses

Compatible Substrates & Surfaces
Cure Method
Applications
  • Designed for optically harsh environments such as High Power LED and UV LED packages
  • Adheres to ceramic, PPA and aluminum without a primer (See Appendix 1)
  • Has excellent thermal stability (See Appendix 1)
  • Protects electrical components and assemblies against shock, vibration, moisture, dust, chemicals, and other environmental hazards
Instructions for Use

Mixing and Vacuum Deaeration

Combine Part A and Part B in a 1:1 mix ratio prior to use. Airless mixing, metering or dispensing equipment is recommended for production operations. If mixing by hand, take care to minimize air entrapment. Remove air entrapped during mixing by common vacuum deaeration procedure, observing all applicable safety precautions. Slowly apply full vacuum to a suitable container of at least four times the volume of material being de-aired. Hold vacuum until bulk deaeration is complete.

Substrate Considerations

LS2-6140 cures in contact with most materials common to electronic assembles. Exceptions include butyl and chlorinated rubbers, some Tin condensation cure silicones and unreacted residues of some curing agents. Units being encapsulated or potted should be clean and free of surface contaminates. Containers and dispensers being used should also be clean and dry. Cure inhibition can usually be prevented by washing all containers with solvent or volatizing the contaminant by heating.

Use By Date

LS2-6140 has a use by date of 6 months from the date of manufacture when stored below 40°C in original, unopened containers.

Properties

Flame Rating
Appearance
Clear
Typical Properties
ValueUnitsTest Method / Conditions
Viscosity2,740 (2,740 )cP (Mpa*s)
Durometer Type A50.0
Tensile1,130 (7.79 )psi (MPa)
Elongat ion150.0%
Cte330.0ppm/°C
Ionic Content Clmax. 2.5ppm
Ionic Content Kmax. 2.5ppm
Ionic Content Namax. 5ppm
Lap Shear477 (3.29 )psi (MPa)
Mix Rat io0.042361111
Refractive Index1.41
Specific Gravity1.03
Volat ile Content1.0%
Volume Resistivity1.10E+15ohmcm
Cured Properties
ValueUnitsTest Method / Conditions
Cure SystemPlatinum
Cure at 150 °C60.0minutes

Regulatory & Compliance

Certifications & Compliance

Packaging & Availability

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

Storage & Handling

Shelf Life
6 Months