Process for producing nitrile rubbers using ruthenium complex catalysts

US11407843B2 · kind B2 · utility

Assignee

• Arlanxeo Deutschland GmbH · DE

Inventors

• Werner Obrecht · Moers, DE
• Sarah David · Dormagen, DE
• Hiyam Salem · Cologne, DE

Key dates

• Filing date: Dec 5, 2018
• Grant date: Aug 9, 2022
• Expiry date: Dec 16, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08C19/00
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing nitrile rubbers having reduced molecular weight by metathesis of a first nitrile rubber in the presence of specific ruthenium complex catalysts that have particular N-heterocyclic carbene ligands.