The present invention relates to a rubber composition for run flat tires, containing a rubber component; a low-molecular weight conjugated diene-based polymer having a weight average molecular weight of 10,000 to 40,000 as expressed in terms of polystyrene in an amount of 1 to 10 parts by mass based on 100 parts by mass of the rubber component; and a vulcanization accelerator, with a ratio of the content of the vulcanization accelerator to the content of the low-molecular weight conjugated diene-based polymer (vulcanization accelerator/low-molecular weight conjugated diene-based polymer) being 1 to 3.5, from which a run flat tire with improved run flat durability without impairing the ride comfort is obtained. The run flat tire includes a sidewall section having a side reinforcing rubber layer formed from the rubber composition for run flat tires, a tread, a carcass, a bead core, and a bead filler.
RUN-FLAT TIRE RUBBER COMPOSITION AND RUN-FLAT TIRE
2020-02-20
Patent
Electronic Resource
English