Patent ID: 7174937
Filing Date: 2007-02-13
Classification: B60C,C08C,C08K

Abstract:
1. A run flat tire having a sidewall with a reinforcing rubber layer formed from a rubber composition comprising 10 to 100 parts by weight of carbon black having nitrogen-adsorbing specific surface area of 30 to 100 m2/g and dibutyl phthalate oil absorption of at least 50 ml/100 g, at least 2 parts by weight of a vulcanizing agent, and at least one mica selected from the group consisting of kaolinite, sericite, phlogopite and muscovite, based on 100 parts by weight of a rubber component containing 10 to 50% by weight of star-shaped solution polymerization butadiene rubber; wherein said solution polymerization butadiene rubber has a vinyl bond amount of 5 to 20% by weight, coupling ratio by tin tetrachloride of at least 25% and molecular weight distribution of 1.2 to 3.