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CHT Group QSil 559

CHT Group QSil 559 is a 100% silicone solid elastomer designed for electrical potting applications. This addition-cure potting material is a two-component system that has a long gel time. It offers a hard, thermally conductive, low-modulus material that is readily repairable.

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

Application Area: Aerospace Applications

Cure Method: 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
  • Long gel time
  • Good elongation
  • Low modulus

Applications & Uses

Application Area
Cure Method
Use and Cure Information

Mixing

  • In order to achieve optimum performance, the same lot number of QSil 559 A and QSil 559 B should be used.
  • QSil 559 A and QSil 559 B should be thoroughly mixed prior to catalyzation.

 

Mixing by hand:

  • Catalyze QSil 559 A with QSil 559 B at a 1:1 ratio by weight using a clean plastic or metal container of approximately 3 times the volume of the material and mix by hand.
  • Accurate weighing of all components, on a suitable scale, is essential for optimal product performance when mixing by hand.

 

Mixing and dispensing with automatic equipment:

Use a mixing system that will properly mix the QSil 559 A and QSil 559 B 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
Thermal Properties
ValueUnitsTest Method / Conditions
Thermal Conductivity**approx. 0.37W/mK
Useful Temperature Range- 55 - 204°C
Catalyzed Properties
ValueUnitsTest Method / Conditions
Mix Ratio1:1
Gel Time* (at 25 °C)14.0Minutes
Electrical Properties
ValueUnitsTest Method / Conditions
Dissipation Factor0.003
Dielectric Constant (at 1,000Hz)3.2
Volume Resistivity1.16 x 10¹⁵Ω.cm
Cured Properties
ValueUnitsTest Method / Conditions
Shore A Hardness50.0Durometer
Tensile Strength250.0psi
Elongation110.0%
UL 94 V-03.0mm
Uncatalyzed Properties
ValueUnitsTest Method / Conditions
Appearance (QSil 559 A)Beige
Viscosity (QSil 559 A)2000.0cps
Specific Gravity (QSil 559 A)1.31
Appearance (QSil 559 B)Black
Viscosity (QSil 559 B)1200.0cps
Specific Gravity (QSil 559 B)1.31
Note
  • * Gel time is defined as the time required for the material to become a solid or semi-solid.
  • ** Results based on similar material

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 54 °C (130 °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.