Polydiorganosiloxane/polycarbonate block copolymers

US4732949A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Winfried Paul · Krefeld, DE
• Werner Nouvertne · Krefeld, DE
• Hartmut Lower · Krefeld, DE
• Mark W. Witman · Pittsburgh, US
• Ulrich Grigo · New Martinsville, US

Key dates

• Filing date: Feb 12, 1986
• Grant date: Mar 22, 1988
• Expiry date: Feb 12, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/448
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to the preparation of thermoplastic poly-(diorganosiloxane)/polycarbonate block copolymers containing monoalkylphenyl or dialkylphenyl end groups by the phase boundary process, and to the block copolymers which can be obtained by the process.