COOTHERM CIRCALOK 6037

Harmonization Code : 3907.30.00.15 | Epoxide resin, halogen-free

COOTHERM CIRCALOK 6037

Main features

  • Thermally Conductive Bonding
  • 500,000 cP Resin Viscosity
  • 1.2 W/(m K) Thermal Conductivity

Product Description

CoolTherm® EP-6037 Epoxy Resin is a thermally conductive epoxy resin formulated for use with selected CoolTherm hardeners to create two-component bonding systems. The black or green paste is used in semiconductor and electronics assemblies to form thermally conductive joints in fabricated heat sinks, between heat sinks and power devices, and between semiconductors or transistors and heat sinks. The resin has a typical viscosity of 500,000 cP at 25°C and a specific gravity of 2.35. Processing and final properties depend on whether CoolTherm EP-6010 or EP-6252 hardener is selected.

Key features

  • Thermally conductive epoxy resin: The resin is paired with selected CoolTherm hardeners for heat-sink and power-device bonding.
  • Controlled paste consistency: Typical resin viscosity is 500,000 cP at 25°C.
  • Two documented hardener options: EP-6010 and EP-6252 provide different mix ratios and cured-property profiles.

Applications / Suitable for

  • Thermally conductive joints in fabricated heat sinks
  • Bonding heat sinks to power devices
  • Bonding semiconductors and transistors to heat sinks
Product Family

COOTHERM 6037

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
Black or Green Paste
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.
2.35
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
500,000 mPa.s

Additional Information

Technical properties

As-supplied / before-processing properties

Typical as-supplied or mixed-state values unless otherwise stated. These values are not sales specifications.

Property Value Unit Method / condition
Appearance Black or green paste N/A As supplied
Viscosity 500,000 cP At 25°C
Specific gravity 2.35 N/A As supplied
Mix ratio with EP-6010 100:3.4 parts by weight Resin : hardener
Working life with EP-6010 2 h At 25°C
Mix ratio with EP-6252 100:7.1 parts by weight Resin : hardener
Working life with EP-6252 3 h At 25°C
Cure options 24 h at 25°C; 2 h at 65°C N/A Both documented hardener systems
Technical properties

After-processing / final-state properties

Typical final-state values under the stated system and test conditions. These values are not sales specifications.

Property Value Unit Method / condition
Thermal conductivity 1.2 W/m·K With EP-6010; ISO 22007-2 Hot Disc
CTE 52 ppm/°C With EP-6010
Glass-transition temperature 106 °C With EP-6010; TMA
Hardness 93 Shore D With EP-6010
Thermal conductivity 1.1 W/m·K With EP-6252; ISO 22007-2 Hot Disc
CTE 31 ppm/°C With EP-6252
Glass-transition temperature 70 °C With EP-6252; TMA
Hardness 92 Shore D With EP-6252

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