DAEJEON, South Korea — Hankook Tire & Technology Co. Ltd. has struck a deal with the Belgian chemical conglomerate Solvay S.A. to work together to develop silica, a key ingredient in reducing tire rolling resistance, from sustainable sources.
"By collaborating with Solvay, we can advance the development of sustainable materials that enhance tire performance while contributing to a circular economy and a greener future," Bonhee Ku, Hankook Tire president and chief technology officer, said, calling the deal a "significant milestone" on Hankook's journey toward sustainable tire manufacturing.
Hankook noted that some of the most sustainable silicas — those derived from rice husk ash — face a number of challenges, particularly the availability of supply and cost of transport. The tire maker's partnership with Solvay gives it the chance to bring to market a more reliable and sustainable source of silica, the partners said.
Financial terms of the agreement — Hankook's third such deal in the past couple of years — were not disclosed.
The performance properties that silica brings to the table are essential, and Solvay said its products have demonstrated key characteristics such as low rolling resistance and treadwear resistance.
"Silica is essential for high-performance tires," An Nuyttens, president of Solvay's Silica and Special Chem business, said. "We are thrilled to collaborate with Hankook on circular silica solutions to address key industry challenges while offering superior performance and environmental benefits. Together, we aim to push the boundaries of sustainable innovation."
Using siica in rubber compounding is recognized as a way to ensure low rolling resistance, which contributes to lower fuel consumption for thermal engines and extended battery range for electric vehicles, Solvay said, while also providing higher wear resistance.
In addition, the use of highly dispersible silica (HDS) is instrumental to tire makers' sustainability ambition. Solvay has pilot production of rice-hulk-ash-derived silica under way at its plant in Livorno, Italy, and is engaged in a substantial circular conversion in all regions with tire industry leaders.
The companies plan to advance the technical development of "circular" silica, Solvay said, with the goal of mass production in the near future. Solvay products, currently at pilot phase, are under evaluation.
This partnership aligns with both companies' commitment to sustainability and their shared goal of a more environmentally responsible automotive future.
For Hankook, the partnership with Solvay underscores its commitment to more sustainable product offerings and manufacturing initiatives. Its commitment extends through previous partnerships established with SK Chemicals and Hyosung Advanced Materials last year and Kumho Petrochemical in 2023.
Hankook said it looks to gradually scale the circular silica for mass production. Sample evaluations are under way.