Process for molding aromatic polycarbonates having perfluoroalkanesulphonic acid derivatives as mold release agents

US4041003A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Siegfried Adelmann
• Dieter Margotte
• Hugo Vernaleken · Walsrode, DE
• Hans Niederprum · Monheim, DE
• Johann-Nikolaus Meussdoerffer
• Werner Nouvertne · Krefeld, DE

Key dates

• Filing date: Feb 9, 1976
• Grant date: Aug 9, 1977
• Expiry date: Feb 9, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/43
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention is concerned with a process for molding thermoplastic, high molecular weight aromatic polycarbonates the improvement which comprises adding to the aromatic polycarbonate from about 0.001 to 1% by weight of a mold release agent selected from the group consisting of perfluoroalkanesulphonic acid amides, cyclimmonium salts of perfluoroalkanesulphonic acids and ammonium salts of perfluoroalkanesulphonic acids.