Patent ID: 7498366
Filing Date: 2009-03-03
Classification: B60C,C08K,C08L

Abstract:
1. A rubber composition for a sidewall comprising 45 to 60 parts by weight of a carbon black, not more than 1.5 parts by weight of powder sulfur, 0.45 to 0.5 parts by weight of N-cyclohexyl-2-benzothiazolylsulfenamide and 1.5 parts by weight of paraffin wax in which a distribution of the number of carbon atoms is 20 to 50, a ratio (iso content/normal content) of iso content to normal content is 5/95 to 20/80, and in the distribution of the number of carbon atoms of each of the iso content and the normal content, a standard deviation/average number of carbon atoms of the iso content is 1.0 to 1.8 and a standard deviation/average number of carbon atoms of the normal content is 1.0 to 1.8 based on 100 parts by weight of a rubber component comprising a butadiene rubber in an amount of 35 to 55% by weight and a natural rubber.