Composites Comprising Metal Reinforcing Elements and Elastomeric Compositions Containing Adhesion Promoting Resins - Patent application

JP2024515508A5Active Publication Date: 2025-03-31MICHELIN & CO (CIE GEN DES ESTAB MICHELIN)
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Patent Information

Application Number
JP2023560545
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2021-03-29
Filing Date
2022-03-21
Publication Date
2025-03-31
Estimated Expiration
2042-03-21

AI Technical Summary

Technical Problem

Existing reinforced rubber compositions for tires face challenges in maintaining adhesion to metal reinforcing cords while reducing the environmental impact of cobalt salts and sulfur content, and improving hysteresis properties and cracking resistance.

Method used

A composite material comprising a reinforcing element with a copper-zinc alloy surface, embedded in an elastomeric composition with a phenol/aldehyde resin system, uses a sulfur-crosslinked system with reduced cobalt content and phenol/aldehyde resin content below 10 phr, along with diene elastomers and reinforcing fillers like carbon black or silica, to enhance adhesion and durability.

Benefits of technology

The solution achieves improved adhesion, reduced hysteresis loss, and enhanced resistance to cracking, while minimizing environmental impact by reducing cobalt and sulfur content, thus maintaining tire performance and durability.

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Abstract

The present invention relates to a composite material containing at least one reinforcing element presenting a surface comprising an alloy of copper and zinc, said reinforcing element being embedded in an elastomeric composition based on at least one diene elastomer, a reinforcing filler, a sulfur crosslinking system and a phenol-aldehyde resin based on at least one aromatic polyphenol and at least one dialdehyde compound having two aldehyde functions, the content of the phenol-aldehyde resin being less than 10 phr, preferably less than 6 phr.
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