Adhesives with Thermal Conductivity for Applications on PCBs

Adhesives with thermal conductivity are often used to dissipate heat from power electronics. Used to bond heat sinks, for example, their heat conductivity reduces thermal strain to prevent performance loss or failure of electronic components.

The thermally conductive adhesives are synthetic resins augmented with metallic or inorganic filler materials. The best thermal conduction coefficients can be achieved with metallic fillers such as silver or graphite. These, however, also make the adhesive electrically conductive, which is undesirable in many applications. To achieve thermal conductivity and electrical isolation at the same time, adhesives augmented with ceramic or mineral-based fillers must be used.

Compared to heat transfer compounds, thermally conductive adhesives have the advantage of securing components in addition to dissipating thermal energy.

Panacol offers a wide selection of thermally conductive adhesives: The spectrum ranges from epoxy resin-based single- and two-component adhesives of its Elecolit® adhesives, which are thermally curing and have a high temperature resistance of up to 200°C, to acrylate-based UV-curing adhesives of the Vitralit® series.

Adhesive with thermal conductivity is used for bonding heat sinks in the electronics industry

The table below lists a selection of heat-conductive adhesives from Panacol. Further products and custom solutions are available on request.

Heat-conductive adhesive Viscosity [mPas] Base Curing* Properties
Elecolit® 6207 9,000-12,000 2 component epoxy thermal
room temperature
thermally conductive
black color
Ul listing
Elecolit® 6601 12,000-20,000 epoxy thermal thermally conductive
white color
Elecolit® 6603 95,000-115,000 epoxy thermal thermally conductive
Elecolit® 6604 110,000-140,000 epoxy thermal thermally conductive
Elecolit® 6616 paste-like 2 component epoxy thermal
room temperature
thermally conductive
black color
Vitralit® 6129 10,000-40,000 acrylate UV
thermal
White color
very high resistance to heat and chemicals
very good thermal conductivity
Vitralit® 6137 150,000-170,000 acrylate UV
thermal
Very high chemical resist.
suitable for high temper. ranges
excellent temper. conductivity
white color
fast fixing of components with UV light
thermal post-curing optional

*UV = 320 - 390 nm