Process for the isolation of thermoplastic polycarbonate from solution with vapor of benzene or alkylbenzene

US4631338A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Karl-Heinrich Meyer · Krefeld, DE
• Uwe Hucks · Alpen, DE
• August Horsthemke · Krefeld, DE

Key dates

• Filing date: Aug 5, 1985
• Grant date: Dec 23, 1986
• Expiry date: Aug 5, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G64/40
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to the isolation of thermoplastic polycarbonates from their solutions by treating the organic solutions, obtained in the phase boundary processes, of the thermoplastic polycarbonates with vapors of benzene or alkylbenzenes.