Stiff-chain polyheterocycles having improved solubility, a process for their production and their use

US5134219A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans R. Kricheldorf · Hamburg, DE
• Jurgen Engelhardt · Bad Fallingbostel, DE
• Ralf Pakull · Krefeld, DE
• Volker Eckhardt · Walsrode, DE
• Ulrich Leyrer · Leverkusen, DE

Key dates

• Filing date: Nov 26, 1990
• Grant date: Jul 28, 1992
• Expiry date: Nov 26, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G75/32
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The substituted polyheterocycles containing recurring structural units corresponding to the formula ##STR1## in which X is an oxygen atom, a sulfur atom or N-H, show good solubility in mixtures of methanesulfonic acid and methylene chloride or trifluoroacetic acid and methylene chloride. They may be used for the production of mixtures with thermoplastic polymers.