New thermally conductive adhesive for manual applications 13 September 2021

Polytec PT has added three products to its extensive range of thermally conductive adhesives, which can be easily processed from side by side cartridges.

This range was developed in order to address the inherent challenges when processing two-component materials manually. Polytec TC 406, Polytec TC 411, as well as Polytec TC 422, are available in side by side cartridges. Both components of the adhesive are already filled in the correct mixing ratio and can be easily dispensed by means of a dispensing gun. Resin and hardener mix automatically in the attached static mixer.

The adhesives are ceramic filled and thus electrically insulating, two component products which cure at room temperature. If desired, the cure can be accelerated by heat. The variants differ in their thermal conductivity, temperature resistance and their mechanical properties.

Firstly, Polytec TC 406 is characterised in particular by its high thermal conductivity and mechanical strength. Secondly, Polytec TC 411 is a flexible thermally conductive adhesive that is able to compensate for thermo-mechanical stress and also adheres well to difficult to bond plastic surfaces. Finally, Polytec TC 422 has a very good adhesion especially to metallic surfaces and a high temperature resistance.

When used as a bonding technique, thermally conductive adhesives fasten components to create a durable mechanical connection, while enabling heat to transfer from the warmer component to the colder component. Thus in many cases, thermally conductive bonding, in particular with epoxies is an alternative to conventional connection processes such as soldering, welding or mechanical attaching.

The processing of two component systems is often a challenge in practice. On the one hand, the mixing ratio of resin and hardener must be kept as accurate as possible. On the other hand, both components must be sufficiently mixed to ensure proper curing of the material.

Claire Aldridge Deputy Editor t: +44 (0) 1727 743 889

Having joined the magazine in 2012, Claire developed her knowledge of the industry through the numerous company visits, exhibitions and conferences she attended both in the UK and abroad.

Claire prides herself on keeping readers well informed and up to date with the latest industry news.