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CHT Group QSil 550LV A&C

CHT Group QSil 550LV A&C is a 100% silicone solids elastomer designed for electronic potting applications. This addition-cure potting elastomer is a two-component system that offers a hard, thermally conductive, low-modulus material that is readily repairable. It cures at room temperature.

Product Type: 2K (2 component) Adhesive, Encapsulant, Potting Compound, Solvent free (100% Solids) Adhesive

Cure Method: Air Dry, Chemical Cure

Chemical Family: Silicones

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Labeling Claims
Key Features
  • 100% solids - no solvents
  • Room temperature cure

Applications & Uses

Use and Cure Information

Mixing

  • In order to achieve optimum performance, the same lot number of QSil 550LV A and QSil 550LV C should be used.
  • QSil 550LV A and QSil 550LV C should be thoroughly mixed prior to catalyzation.

 

Mixing by hand:

Catalyze QSil 550LV A with QSil 550LV C at a 1:1 ratio by weight using a clean plastic or metal container of approximately 3 times the volume of the material to be mixed and mix by hand. Accurate weighing of all components, on a suitable scale, is essential for optimal product performance when mixing by hand. Mix until the material is uniform with no visible striations.

Mixing and dispensing with automatic equipment:

Use a mixing system that will properly mix the QSil 550LV A and QSil 550LV C at a 1:1 ratio by weight.

De-aeration

  • Air trapped during mixing should be removed by vacuum at 29 inches of mercury. During the process, the material will expand, and intermittent evacuation may be required.
  • Machine mixed material does not normally need to be de-aired.

Properties

Flame Rating
Typical Properties
ValueUnitsTest Method / Conditions
Mix Ratio1:1
Mixed Viscosity1300.0cps
Shore A Hardness62.0Durometer
Dielectric Strength500.0V/mil
Volume Resistivity1.47x10¹⁵ohm-cm
Thermal Properties
ValueUnitsTest Method / Conditions
Thermal Conductivity**approx. 0.37W/mK
Useful Temperature Range- 55 - 204°C
Catalyzed Properties
ValueUnitsTest Method / Conditions
Gel Time* (at 25 °C)110.0Minutes
Mix Ratio1:1
Electrical Properties
ValueUnitsTest Method / Conditions
Dissipation Factor0.001
Dielectric Constant (at 1,000Hz)3.12
Volume Resistivity1.47 x 10¹⁵Ω.cm
Cured Properties
ValueUnitsTest Method / Conditions
Shore A Hardness62.0Durometer
Tensile Strength450.0psi
Elongation90.0%
Tear20.0ppi
Youngs Modulus450.0psi
UL 94 V-03.0mm
Mixed Viscosity1300.0cps
Uncatalyzed Properties
ValueUnitsTest Method / Conditions
Appearance (QSil 550LV A)Beige
Viscosity (QSil 550LV A)1300.0cps
Specific Gravity(QSil 550LV A)1.41
Appearance (QSil 550LV C)Black
Viscosity (QSil 550LV C)1300.0cps
Specific Gravity(QSil 550LV C)1.41
Note

* Gel time is defined as the time required for the material to become a solid or a semi-solid.

Regulatory & Compliance

Certifications & Compliance

Storage & Handling

Shelf Life
24 Months
Storage and Shelf Life
  • This product is best when used within 24 months from date of manufacture. See product label and/or CoA for specific "Use By Date".
  • Product should be stored in its original, unopened container in an environment that does not exceed 38 °C (100 °F).
  • Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case, the properties required for the intended use should be checked for quality assurance reasons.