Stabilized, filled polycarbonate compositions

US11345812B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Tim Hungerland · Cologne, DE
• Tanja Cassel · Oberhausen, DE

Key dates

• Filing date: Dec 12, 2018
• Grant date: May 31, 2022
• Expiry date: Jan 5, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/03
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to the use of PMMI copolymers for reducing the molecular weight degradation of the polymer induced by oxides such as titanium dioxide or silicon dioxide in compositions based on aromatic polycarbonate. The mechanical, optical and rheological properties of the thermoplastic composition remain good and are in some cases even improved despite the addition of the PMMI copolymer.