Stabilized rubber composition providing protection against ozone

Abstract

A rubber composition having a good antiozonation performance, particularly without the need for the use of 6PPD. Such a rubber composition is suitable for rubber articles, which include, besides sealings and gaskets, especially vehicle tires, such as rubber pneumatic tires, solid tires and non-pneumatic tires, and as well general rubber products that are exposed to continuous and intermittent dynamic operation conditions and require protection from ozonation like belts, hoses, cables, automotive mounts and bushings. In the rubber composition, the antiozonant compound is a N-heteroaromatic diaminoaryl compound of formula (II): Wherein X1 to X8, R1, R1’ and R2 are defined as in the description, and which is used to protect rubber composition from ozonation and consecutively from the damaging effect caused to the rubber composition by ozonation.