Thermoplastic molding composition and articles thermoformed therefrom

US7446144B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Eckhard Wenz · Neunburg vorm Wald, DE
• Pierre Moulinie · Leverkusen, DE
• Thomas Eckel · Dormagen, DE
• Vera Buchholz · Recklinghausen, DE
• Dieter Wittmann · Leverkusen, DE
• Bruce Hager · Schoutenkamp, US
• Fred J. Zaganiacz · Pittsburgh, US

Key dates

• Filing date: Sep 14, 2005
• Grant date: Nov 4, 2008
• Expiry date: Sep 2, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L67/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A thermoplastic molding composition suitable for preparing articles by thermoforming is disclosed. The molding composition that comprise A) branched, aromatic poly(ester)carbonate, B) graft polymer, C) an optional vinyl(co)polymer and or polyalkylene terephthalate, D) at least one flame retarding phosphorous compound selected from the group consisting of mono- and oligomeric phosphorus and phosphonic acid esters, phosphonate amines and phosphazenes and E) talc, is characterized in that its flexural modulus at room temperature is at least 3000 N/mm2 and that its falling dart energy at break, at −30° C., is at least 40.0 J. Sheets extruded of the composition are suitable for making useful articles by thermoforming.