Process for the production of water and solvent-free nitrile rubbers

US9469697B2 · kind B2 · utility

Assignees

• LANXESS Deutschland GmbH · DE
• ARLANXEO SWITZERLAND S.A. · CH

Inventors

• Hanns-Ingolf Paul · Leverkusen, DE
• Paul Wagner · Mülheim an der Ruhr, DE
• Rolf Feller · Mettmann, DE
• Jörg Kirchhoff
• John Lovegrove · Sarnia, CA
• Florian Forner · Cologne, DE
• Michael Klimpel · Langenfeld, DE
• Peter Weuta · Leverkusen, DE
• Sven Brandau · Strasbourg, FR

Key dates

• Filing date: Mar 21, 2011
• Grant date: Oct 18, 2016
• Expiry date: May 26, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L9/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to specific water and solvent-free nitrile rubbers having specific functional groups and/or end groups, a process for the production thereof and the use thereof. This process involves removing volatile compounds from a fluid (F) containing (1) at least one nitrile rubber and (2) at least one volatile compound, wherein the process comprises at least the steps of a.) treating the fluid (F) in at least one conversation unit, b.) retreating the concentrated fluid from step a.) in at least one retreating unit and c.) feeding the retreated concentrated fluid from step b.) into at least one retreating unit.