COOLTHERM SC-6709

Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others

COOLTHERM SC-6709

Main features

  • 1.0 W/(m K) Thermal Encapsulation
  • Three Hardener Options
  • 68 to 205 deg C Service Range

Product Description

CoolTherm® SC-6709 Silicone Encapsulant is a two-component, solvent-free RTV silicone system for thermally conductive potting and encapsulation. The white SC-6709 resin may be combined with CoolTherm SC-6731, CoolTherm SC-6730, or Circalok™ 6732 hardener to provide different mix ratios and room-temperature cure times. After cure, the flexible silicone provides typical thermal conductivity of 1.0 W/m·K, dielectric strength of 21.7 kV/mm, and a documented operating-temperature range from -68°C to +205°C.

Key features

  • Thermally conductive encapsulation: Provides typical cured thermal conductivity of 1.0 W/m·K using the Hot Disc Transient Method, ISO 22007-2.
  • Multiple hardener options: Compatible with CoolTherm SC-6731, CoolTherm SC-6730, and Circalok 6732 hardeners for configurable mix ratios and cure times.
  • Broad operating-temperature range: Suitable for parts and devices experiencing temperatures from -68°C to +205°C.

Applications / Suitable for

  • Thermally conductive potting and encapsulation
  • Applications requiring flexible silicone encapsulation and high-temperature service
Product Family

COOLTHERM SC-6709

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
White Liquid
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume. For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
1.80
Physical Properties
Viscosity
Viscosity is a measurement of a fluid’s resistance to flow. Viscosity is commonly measured in centiPoise (cP). One cP is defined as the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP. A product like honey would have a much higher viscosity -around 10,000 cPs- compared to water. As a result, honey would flow much slower out of a tipped glass than water would. The viscosity of a material can be decreased with an increase in temperature in order to better suit an application
32000 mPa.s

Additional Information

Technical properties

As-supplied / before-processing properties

Typical properties of CoolTherm SC-6709 resin and its supported resin-to-hardener systems before cure. Values are not intended for specification purposes.

Property Value Unit Method / condition
Appearance White liquid — CoolTherm SC-6709 resin as supplied
Viscosity 32,000 cP CoolTherm SC-6709 resin at 25°C; test method not stated
Specific gravity 1.80 — CoolTherm SC-6709 resin at 25°C
Mix ratio by weight 100:0.5 / 100:5 or 100:10 / 100:0.5 Resin:hardener SC-6731 / SC-6730 / Circalok 6732 hardener, respectively
Gel time 1–2 / 0.5–1 / 2–3 hours At 25°C with SC-6731 / SC-6730 / Circalok 6732 hardener, respectively; both SC-6730 mix ratios have the same stated range
Cure time 12–16 / 8–12 / 6–8 hours At 25°C with SC-6731 / SC-6730 / Circalok 6732 hardener, respectively; both SC-6730 mix ratios have the same stated range
Shelf life 6 months CoolTherm SC-6709 resin stored at 25°C in the original, unopened container
Technical properties

After-processing / final-state properties

Typical cured properties of CoolTherm SC-6709 silicone systems. The cured properties are stated to be the same regardless of the supported hardener used. Values are not intended for specification purposes.

Property Value Unit Method / condition
Thermal conductivity 1.0 W/m·K Hot Disc Transient Method, ISO 22007-2
Coefficient of linear thermal expansion 50 ppm/°C Test method and temperature region not stated
Hardness 50 Shore A Test method not stated
Tensile strength 2.14 (310) MPa (psi) At 25°C; test method not stated
Elongation at break 115 % Test method and test temperature not stated
Moisture absorption 0.08 % 10 days at 25°C; exposure medium and test method not stated
Volume resistivity 1 × 1015 ohm-cm At 25°C; test method not stated
Dielectric strength 21.7 (550) kV/mm (V/mil) ASTM D149; specimen thickness not stated

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