Process for the preparation of flame-resistant polycarbonates

US4289685A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Frank Druschke · Stuttgart, DE
• Dieter Margotte
• Erhard Tresper · Krefeld, DE
• Ludwig Bottenbruch · Krefeld, DE
• Wolfgang Cohnen · Leverkusen, DE
• Uwe Hucks · Alpen, DE

Key dates

• Filing date: Aug 4, 1980
• Grant date: Sep 15, 1981
• Expiry date: Aug 4, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/0066
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for rendering flame-resistant the thermoplastic aromatic polycarbonates prepared by a solution process, characterized by dispersing an aqueous solution of salt-like flameproofing agent in a washed and neutral polycarbonate/organic solvent system.