Statistical mixtures of halogenated bisphenols with halogen-free bisphenols

US4075119A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Manfred Schmidt · Krefeld, DE
• Dieter Freitag · Krefeld, DE
• Werner Nouvertne · Krefeld, DE

Key dates

• Filing date: Apr 21, 1976
• Grant date: Feb 21, 1978
• Expiry date: Apr 21, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G64/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to statistical mixtures of halogenated bisphenols with halogen-free bisphenols and to processes for their preparation. This invention further relates to new aromatic, bromine-containing and/or chlorine-containing, high-molecular weight thermoplastic polycarbonates with good resistance to fire (oxygen index .gtoreq. 36%) and good flow properties, to their preparation from the statistical mixtures of halogenated bisphenols and halogen-free bisphenols and to their use alone or as a mixture with halogen-free polycarbonates or with thermoplastic polyesters for the preparation of moldings, films and fibers.