COOLTHERM MT-322

Harmonization Code : 3208.20.90 | Paints and varnishes that are dispersed or dissolved in a non aqueous medium

COOLTHERM MT-322

Main features

  • 1.7 W/(m K) Thermal Conductivity
  • One-Month Working Life at 25 deg C
  • -40 to +200 deg C Service Range

Product Description

CoolTherm MT-322 Thermally Conductive Adhesive is a one-part, gray silicone adhesive for bonding electronic components to lids, heat spreaders, and heat sinks. The material cures to a flexible elastomer and has a typical viscosity of 65,000 cP at 25 deg C with a one-month working life at that temperature. Cure schedules are 60 minutes at 120 deg C or 30 minutes at 150 deg C after the material reaches the target temperature. Typical cured thermal conductivity is 1.7 W/(m K), and the stated service-temperature range is -40 to +200 deg C.

Key features

  • Cured thermal conductivity: Typical cured thermal conductivity is 1.7 W/(m K).
  • Extended working life: Typical working life is one month at 25 deg C before cure.
  • Service-temperature range: The stated service-temperature range is -40 to +200 deg C.

Applications

Bonding memory chips and other electronic components to lids, heat spreaders, and heat sinks.

Product Family

COOLTHERM MT-322

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
Gray 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.
2.80
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
65,000 mPa.s
Electrical Properties
Volume Resistivity
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
2 x 10^15 Ohms⋅cm
Thermal Properties
Thermal Conductivity
Thermal conductivity describes the ability of a material to conduct heat. It is required by power packages in order to dissipate heat and maintain stable electrical performance. Thermal conductivity units are [W/(m K)] in the SI system and [Btu/(hr ft °F)] in the Imperial system.
1.7 W/m.K

Additional Information

Technical properties

As-supplied / before-processing properties

PropertyValueUnitMethod / condition
AppearanceGray pasteTypical; uncured
Viscosity65,000cPTypical; 25 deg C
Specific gravity2.80Typical; uncured
Working life1monthTypical; 25 deg C
Shelf life6monthsOriginal unopened container; 5 deg C
Technical properties

Cured adhesive properties

PropertyValueUnitMethod / condition
Thermal conductivity1.7W/(m K)Typical; Mathis Hot Disk
Volume resistivity2 x 10^15ohm-cmTypical; ASTM D257; 25 deg C
CTE160ppm/deg CTypical
Hardness65Shore ATypical; ASTM D2240
Lap shear strength305psiTypical; ASTM D1002
Dielectric constant2.9Typical; ASTM D150; 1 MHz

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