Rubber composition comprising a polyphenolic compound

Abstract

The invention relates to a rubber composition based on at least one elastomer, a reinforcing filler, a crosslinking system and at least one polyphenolic compound, said polyphenolic compound comprising at least three aromatic rings, each bearing at least two vicinal hydroxyl groups.

Description

technical field

[0001] The present invention relates to elastomer-based rubber compositions, to composite materials comprising such compositions, and to tires comprising such compositions or such composite materials. Background technique

[0002] The carcass plies used in tire reinforcements generally consist of a rubber compound and reinforcing cords, usually metallic and covered on the surface with brass. Since these plies are subjected to high stresses during tire rolling, it is understood that the adhesion between the rubber and the reinforcing elements is a key property.

[0003] The adhesive function of rubber compositions often requires specific formulations, in particular high levels of sulfur and zinc oxide, small amounts of stearic acid, the presence of cobalt salts and the use of accelerators with long retardation phases. In fact, these vulcanization systems with their high sulfur content constitute a major limitation during the manufacture of semi-finished produ...

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