Rubber composition for topping a case and/or breaker used for run-flat tire and run-flat tire using the same

摘要

A rubber composition for topping a case and/or a breaker used for a run-flat tire capable of obtaining adequate hardness and excellent in low heat build-up property, elongation at break, complex elastic modulus and run-flat durability and a tire using the same are provided. The rubber composition for topping a case and/or a breaker used for a run-flat tire, comprises (B) 2 to 3.5 parts by weight of sulfur, (C) 2 to 10 parts by weight of at least one compound selected from the group consisting of a cresol resin, a resorcinol condensate and a modified resorcinol condensate and (D) 4 to 15 parts by weight of a softening agent, based on (A) 100 parts by weight of a rubber component, and the tire is prepared by using the same.