High-performance toothed belt made of EPDM

US12196289B2 · kind B2 · utility

Assignee

• ContiTech Deutschland GmbH · DE

Inventors

• Reinhard Teves · Seelze, DE
• Heiko Sattler · Hannover, DE
• Jan Michalk · Ballenstedt, DE
• Antonius Dikmans · Seelze, DE
• Henning Kanzow · Hannover, DE
• Stephanie Kautz · Hannover, DE

Key dates

• Filing date: Nov 25, 2021
• Grant date: Jan 14, 2025
• Expiry date: Nov 25, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2377/00
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to elastomer toothed belts comprising a fabric spanning the teeth of the toothed belt, wherein the elastomer mixture forming the teeth contains a crosslinked ethylene-propylene rubber (EPM) and/or a crosslinked ethylene-propylene terpolymer rubber (EPDM) accounting for at least 70% by weight of the elastomer mixture based on the polymer proportion and wherein an interlayer is arranged between the fabric and the elastomer mixture forming the teeth which contains at least 70% by weight of hydrogenated acrylonitrile-butadiene rubber (HNBR) based on the polymer proportion of the interlayer. Such elastomer toothed belts are halogen-free and feature improved durability and good low-temperature stability properties. The present invention further relates to processes for producing such elastomer toothed belts and to the use of a layer of hydrogenated acrylonitrile-butadiene rubber (HNBR) in such toothed belts to increase service life, to improve low-temperature stability and to improve the adhesion between the teeth and the fabric.