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New functionalised styrenebutadiene rubber for optimised tyre properties
von Dr. Norbert Steinhauser, Dr. Thomas Groß
The tyres’ rolling resistance contributes to 10 – 30 % (depending on the driving
conditions) of a passenger car’s total fuel consumption. Furthermore, the rolling
resistance accounts for 75 % of a passenger car tyre’s environmental and health
impact during the whole product life cycle (from production to scrap disposal).
The strongest effect on rolling resistance reduction can be obtained via the tyre tread, as its contribution to rolling resistance adds up to about 50 %. Styrene-butadiene rubber is, besides the filler, the main component for passenger car tyre tread compounds. Conventional approaches for rolling resistance reduction by changing the SBR microstructure are most often accompanied by a deterioration of other important properties.
However, application-technological studies on passenger car tyre tread compounds containing silica filler and novel solution SBRs with inchain carboxylic groups indicate a reduction in rolling resistance and wear as well as an improved wet grip performance.