Process for producing brominated butyl rubber

US9127137B2 · kind B2 · utility

Assignee

• LANXESS INTERNATIONAL SA · CH

Inventors

• Ricarda Leiberich · Langen, DE
• Joachim C. Ritter · Wilmington, US
• Hanns-Ingolf Paul · Leverkusen, DE
• Udo Wiesner · Bornheim, DE
• Holger Luesgen · Solingen, DE

Key dates

• Filing date: Jul 17, 2012
• Grant date: Sep 8, 2015
• Expiry date: Jul 17, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09J115/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to an energy efficient, environmentally favorable process for the preparation of brominated butyl rubbers, that uses a bromination agent and a oxidizing agent in order to enhance the utilization of bromine contained in the bromination agent. In a preferred embodiment a common medium for both solution polymerization and subsequent bromination of the rubber is employed.