Polycarbonate composition comprising talc

US11795323B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Christopher Schirwitz · Leverkusen, DE
• Michael Erkelenz · Duisburg, DE
• Birte Sämisch · Cologne, DE
• Alexander Meyer · Mülheim an der Ruhr, DE

Key dates

• Filing date: Aug 23, 2017
• Grant date: Oct 24, 2023
• Expiry date: Jun 27, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2203/206
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a composition obtainable by mixing polycarbonate, unsized talc and a specific anhydride-modified alpha-olefin polymer, wherein the amounts of the talc and the specific anhydride-modified alpha-olefin polymer are matched to one another such that, for every 10 parts by weight of the talc, 0.10 to 1.4 parts by weight of the anhydride-modified alpha-olefin polymer are used. It has been shown that in situ sizing of talc with the wax can minimize the degradation of the polycarbonate only in the course of mixing with the polycarbonate and, at the same time, properties such as multiaxial impact resistance and flowability can be improved.