Canadian Finishing and Coatings Manufacturing

 

November 17, 2022

 

Evonik TegoEvonik 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 are characterized by excellent insulation properties and heat resistance, even at temperatures of up to 250 degrees Celsius. TEGO Therm products substantially reduce energy loss and also aid occupational health and safety as they can significantly reduce the temperature of hot surfaces. Insulation coatings also provide protection against moisture penetration and therefore corrosion under insulation (CUI), which significantly increases the service lives of coated items.

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,” said Dr. Niko Haberkorn, head of thermal managing coatings at Evonik Coating Additives.

As a result, non-insulated, hot surfaces increase energy loss and 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,” said Haberkorn.

The new TEGO Therm products in detail

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 C, while standard binders for TICs can only withstand temperatures no higher than 160 degrees C. Given its excellent 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.

Evonik’s coating experts provide their customers with sample formulations incorporating the two granulates for different applications. “We recommend combining the granulates with the heat-resistant binder from the TEGO Therm line, especially for applications involving very high temperatures,” says Markus Hallack, head of applied research for Thermal Managing Coatings.

Evonik 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. Customers from the coating industry that want to enter the thermal insulation market for the first time also benefit because TEGO Therm enables them to work sustainably, safely and efficiently right from the word go. The products from this line are available worldwide.

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