Polymer composition having a filler content and coextruded sheet obtainable therefrom

US9359489B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Ulrich Blaschke · Krefeld, DE
• Heinrich Hähnsen · Duisburg, DE
• Peter Schwarz · Speyer, DE
• Klaus Kraner · Solingen, DE
• Hans-Jürgen Thiem · Dormagen, DE
• Michael Wagner · Dortmund, DE

Key dates

• Filing date: Aug 7, 2012
• Grant date: Jun 7, 2016
• Expiry date: May 19, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/249972
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a polymer composition containing polycarbonate with a weight-average molecular weight Mw of from 24,000 to 33,000 and 5.0 wt. % to 20.0 wt. % (based on the total amount of the composition) of glass hollow spheres with an alkalinity of less than 1.0 meq/g. The present invention furthermore provides coextruded sheets in which the coextruded layer contains this polymer composition, and shaped articles produced therefrom, in particular containers and pieces of luggage, very particularly suitcases. Sheets which are obtainable with the polymer composition according to the invention have a high mechanical stability, a high scratch resistance, pleasant haptic properties and an excellent homogeneous external visual impression. The present invention furthermore relates to a process for the preparation of these polymer compositions and a process for production of the sheets according to the invention.