Evonik develops TEGO Therm fire-resistant coating for electric vehicles

Evonik is expanding its TEGO Therm product range with heat- and fire-resistant coatings for electric vehicle (EV) battery casings and covers.

In the rapidly growing electric vehicle market, safety standards for lithium-ion batteries are becoming increasingly stringent. Coatings based on Evonik's TEGO Therm products are a powerful solution to meet industry needs for effective thermal insulation barriers, which are essential to prevent thermal runaway in EV batteries.

"With the acceleration of the electric vehicle industry, the safety of lithium-ion batteries in electric vehicles has never been more important," said Dr. Benjamin Schaeffner, Global Market Leader Industrial and Transportation Coatings at Evonik's Coating Additives business unit. "TEGO Therm is our response to industry requirements for reliable thermal barriers that not only meet but exceed today's stringent safety standards."

TEGO Therm HPG 4000 particles have a microporous silica core that provides excellent low thermal conductivity, high hydrophobicity and reduced flammability. TEGO Therm HPG 6806 is a finer silica-based particle that not only provides excellent insulation, but also enhances mechanical properties and ensures a smooth, uniform surface for the insulation coating. The water-based polysiloxane hybrid binder TEGO Therm L 300 further improves the thermal stability and fire resistance of the protective coating.

Coatings based on this product family meet the UL 94 V-0 fire protection standard and offer a new level of protection for electric vehicle batteries.

"The synergy between TEGO Therm binder and particles is at the heart of our solution. It minimizes heat transfer and effectively suppresses the spread of fire, providing crucial extra time for emergency response," said Niko Haberkorn, Head of Business Development for the Industrial & Transportation Coatings Segment at Evonik Coating Additives. "In addition, our products ensure high mechanical strength and maintain structural integrity even at high temperatures."