Polycarbonates with aliphatic ketocarboxyl end groups, mixed with known aromatic polycarbonates, their preparation and their use

US5525674A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Wolfgang Ebert · Krefeld, DE
• Burkhard Kohler · Leverkusen, DE
• Klaus Horn · Dortmund, DE
• Richard Weider · Leverkusen, DE
• Thomas Scholl · New Haven, US
• Rolf Dhein · Krefeld, DE
• Jurgen Kirsch · Cologne, DE
• Rolf Wehrmann · Krefeld, DE

Key dates

• Filing date: Mar 1, 1995
• Grant date: Jun 11, 1996
• Expiry date: Mar 1, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L69/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention provides polycarbonates with aliphatic ketocarboxyl end groups, optionally mixed with known aromatic polycarbonates, and a process for their preparation, the chain terminators used being those of formula (I): ##STR1## The present invention also provides mixtures of the polycarbonates or polycarbonate mixtures with reactionless polyisobutylenes.