Polymerization of cyclic aromatic oligomers with low temperature aprotic organic solvent

US4999420A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Edgar Leitz · Dormagen, DE
• Ludwig Bottenbruch · Krefeld, DE
• Karl-Heinz Ott
• Alfred K. Jung · Ridgewood, US
• Ulrich Grigo · New Martinsville, US

Key dates

• Filing date: Sep 14, 1989
• Grant date: Mar 12, 1991
• Expiry date: Sep 14, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G64/307
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

This invention relates to a process for the production of aromatic polycarbonates from cyclic aromatic carbonate oligomers in the presence of aprotic organic solvents at low temperatures.