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Rubber composition comprising a polyphenolic compound

A technology of rubber composition and polyphenol compound, applied in transportation and packaging, special tires, tire parts, etc.

Active Publication Date: 2021-04-30
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Good adhesion properties of rubber compositions to metals are obtained, but require the use of grafted polymers

Method used

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  • Rubber composition comprising a polyphenolic compound
  • Rubber composition comprising a polyphenolic compound
  • Rubber composition comprising a polyphenolic compound

Examples

Experimental program
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Embodiment Construction

[0216] The following procedure was used to prepare the different rubber compositions: The elastomer and all other components of the mixture were successively introduced into an internal mixer (final degree of filling: about 70% by volume), the initial temperature of the vessel being about 60°C. Thermomechanical processing is then carried out in one stage until a maximum "outgoing" temperature of 150°C is reached. The mixture thus obtained is recovered, then cooled at 30° C. on an open mixer (homogenous finisher), and everything is mixed.

[0217] The crosslinking system is added according to the knowledge of the person skilled in the art, the polyacid crosslinking system is added during the first stage and the peroxide and sulfur based crosslinking system is added during the second stage.

[0218] The rubber compositions produced are presented in Tables 1, 2 and 3.

[0219] The quality of the adhesion between the rubber composition and the reinforcing element is determined by...

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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...

Claims

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Application Information

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IPC IPC(8): B60C1/00C08K5/13
CPCB60C1/00C08K5/13B60C2001/0066B60C1/0041B60C1/0016C08L21/00C08L7/00C08L2207/04C08L2312/00
Inventor A-L·蒂耶O·加瓦尔-伦恰
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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