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ULTRASIL 7800 GR optimizes the production of Green Tires for SUVs and all-season tires.
ULTRASIL 7800 GR optimizes the production of Green Tires for SUVs and all-season tires.

Green Tires have proven particularly resource-efficient for cars, where Evonik's Silica/Silane technology can achieve fuel savings of up to 8%.

The new ULTRASIL 7800 GR is a silica with a customized surface area that meets the extreme demands of SUV and all-season tires.

“The challenge for SUV tires is to give the tires sufficient stiffness in spite of their size,” explains Dr. Hark-Oluf Asbahr, Marketing of Rubber Silica. “With ULTRASIL 7800 GR, we managed to find the right mix to combine joy of driving, road safety, and resource efficiency in a single product.”

ULTRASIL 7800 GR achieves a perfect balance of maximum grip and minimal rolling resistance in large-surface tires as well as tires with high mileage requirements, such as all-season tires, according to Evonik.

This is due to the specific surface area of ULTRASIL 7800 GR, which was increased when compared to ULTRASIL 7000 with extensive development efforts. Using the new ULTRASIL 7800 GR reinforces the tread compound and gives tires sufficient stiffness.

“The direct feedback between the tire and the steering system results in significantly greater safety – including in the case of short and wet braking paths,” explains Asbahr.

Improved abrasion resistance also contributes to an extended service life, which has a positive effect on the lifecycle assessment. In this manner, a high level of traffic safety can be combined with lower fuel consumption and reduced CO2 emissions, even in sporty tires.

In spite of the high specific surface area, the product is relatively easy to process and permits an efficient, quick production process in tire manufacturing.

“The demand for SUVs is consistently on the rise worldwide,” says Dr. Bernhard Schäfer, Head of Rubber Silica. “That's why it was particularly important to respond to market impulses and to develop a new product that is meeting tomorrow’s requirements now.”

Since the US is the largest sales market for SUVs, ULTRASIL 7800 GR will be produced there as of now. Evonik’s new world-scale silica plant in South Carolina is expected to be operational in mid-2018, from that time, ULTRASIL 7800 GR will then also be produced there.

ULTRASIL 7800 GR will be presented at the Tire Technology Expo to be held in Hanover from 20-22, February.

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