Thermotropic aromatic polyesters having high rigidity and toughness, process for the production thereof and the use thereof for the production of moulded articles, filaments, fibres and films

US4603190A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans-Rudolf Dicke · Bestwig, DE
• Manfred Schmidt · Krefeld, DE
• Dieter Freitag · Krefeld, DE
• Aziz El-Sayed · Leverkusen, DE

Key dates

• Filing date: Jul 3, 1984
• Grant date: Jul 29, 1986
• Expiry date: Jul 3, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/605
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Thermotropic wholly aromatic polyesters containing condensed residues of p-hydroxybenzoic acid, isophthalic and optionally terephthalic acid, hydroquinone and 3.4'- and/or 4.4'-dihydroxy diphenyl, -diphenyl ether and/or -diphenyl sulphide, have excellent mechanical properties and are nevertheless not difficult to process.