Synthetic rubber with narrow molecular weight distribution, a process for its preparation and a method of use

US7932346B2 · kind B2 · utility

Assignee

• LANXESS Deutschland GmbH · DE

Inventors

• Lothar Reif · Dormagen, DE
• Stephen Pask · Dormagen, DE

Key dates

• Filing date: Jun 7, 2010
• Grant date: Apr 26, 2011
• Expiry date: Jun 7, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F8/50
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A novel process is used to prepare synthetic rubbers (B) which feature very narrow molecular weight distribution and a correspondingly low value for the polydispersity index. The preparation process encompasses the treatment of a synthetic rubber with ultrasound, where the resultant synthetic rubber (B) has a lower weight-average molecular weight (Mw) than the synthetic rubber (A) used. The resultant synthetic rubbers (B) have excellent suitability for processing via extruder processes or injection-molding processes.