Flame retardant impact-modified polycarbonate compositions

US8748521B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Vera Taschner
• Thomas Eckel · Dormagen, DE
• Achim Feldermann · Düsseldorf, DE
• Eckhard Wenz · Neunburg vorm Wald, DE
• Dieter Wittmann · Leverkusen, DE

Key dates

• Filing date: Dec 18, 2009
• Grant date: Jun 10, 2014
• Expiry date: May 29, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L51/085
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present disclosure relates to impact-modified polycarbonate compositions which comprise a graft polymer containing silicone/acrylate composite rubber as the graft base, wherein the content of silicone rubber is 65-95 wt. % (based on the graft base), talc having a d98 value (also called “top cut”) of less than 20 μm and phosphorus-containing flame retardant, the use of the polycarbonate compositions for the production of shaped articles and the shaped articles themselves. The compositions and moulding compositions according to the disclosure have an optimum combination of good flameproofing, good resistance to chemicals and hydrolysis and good mechanical properties (i.e. in particular a high E modulus and high notched impact strength aK).