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Evonik's new additives improve performance of thermal insulation coatings

Source:Adsale Plastics Network 2023-06-03

Evonik has developed a new line of tailor-made feedstocks, TEGO Therm, that substantially improve the performance of thermal insulation coatings (TICs).


The new product range includes two microporous silica-based granules, TEGO Therm HPG 4000 and TEGO Therm HPG 6806, as well as a heat-resistant, silicone-based binder, TEGO Therm L 300.


The three new products from Evonik’s Business Line Coating Additives are characterized by highinsulation properties and heat resistance, even at temperatures of up to 250 degrees Celsius.


This provides the following performance and sustainability benefits: insulation coatings based on TEGO Therm products substantially reduce energy loss, and they also aid occupational health and safety, because they can significantly reduce the temperature of hot surfaces (safe touch).


Insulation coatings also provide protection against moisture penetration and therefore corrosion under insulation (CUI). This significantly increases the service lives of coated items.


Evonik's TEGO Therm is developed to improve the performance of thermal insulation coatings.

One target application for this new generation of feedstocks is the technical insulation of pipelines, tanks or various other components in industrial plants.


A first product based on TEGO Therm granules is already commercially available and can be applied for safe touch and corrosion prevention purposes. Evonik wants to use this product range in the future to provide thermal insulation solutions to its customers in the construction and vehicle manufacturing sectors.


Another benefit of TEGO Therm-based insulation coatings is that they are easy to apply. “Conventional insulation systems, such as mineral wool, are often difficult and time-consuming to apply – appliances and components with complex geometries in particular are often inadequately insulated,” stated Dr. Niko Haberkorn, Head of Thermal Managing Coatings at Evonik Coating Additives.


As a result, non-insulated, hot surfaces increase energy loss and they also need to be protected against accidental contact. In contrast, coatings incorporating products from the TEGO Therm line can be easily applied just by spraying.


“That is even feasible to some extent during ongoing operations. This avoids equipment downtimes and saves time and money,” continued Haberkorn.


Specifically, the TEGO Therm HPG 4000 granules, featuring larger particles of around 300 micrometers, is characterized by particularly low thermal conductivity at high temperatures. TEGO Therm HPG 6806, on the other hand, features finer particles (around 30 micrometers) and enables higher fill levels and ensures that coatings have smooth surfaces.


Both granules are highly insulation-effective, offer mechanical stability and are hydrophobic. Their inorganic structure also makes them non-combustible.


The water-based binder TEGO Therm L 300 can withstand temperatures of up to 250 degrees Celsius, while standard binders for TICs can only withstand temperatures no higher than 160 degrees. Given its very good adhesion to various substrates, TEGO Therm L 300 ensures particularly resilient coatings.


Products from the TEGO Therm line can be combined with one another and with other product lines, depending on the specific application.


“We recommend combining the granulates with the heat-resistant binder from the TEGO Therm line, especially for applications involving very high temperatures,” added Markus Hallack, Head of Applied Research for Thermal Managing Coatings at Evonik.


The company targets its high-performance TEGO Therm product line at formulators, who wish to change their systems, in order to enhance their products and improve the long-term reliability of their coatings.


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