Polyester molding compositions of reduced flammability

US4048135A · kind A · utility

Assignee

• BASF SE

Inventors

• Rolf Wurmb
• Bernd Leutner · Bischofswerda, DE
• Wolfgang Seydl
• Hans-Ulrich Schlimper · Speyer, DE
• Hans-Josef Sterzel · Schifferstadt, DE

Key dates

• Filing date: Mar 8, 1976
• Grant date: Sep 13, 1977
• Expiry date: Mar 8, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K3/22
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Thermoplastic, linear, saturated polyesters containing flameproofing agents consisting of halogen compounds and an antimony trioxide which has been prepared in an aqueous suspension of an inorganic support using an aqueous antimony(III) halide solution and adding an aqueous solution of a base to raise the pH to from 6 to 8 with precipitation of the antimony compound onto the support, followed by separation of the solids from the aqueous phase.