Method for the production of thermoplastic polyoxazolidinone polymers

US11299577B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Carsten Koopmans · Hilden, DE
• Christoph Guertler · Cologne, DE
• Aurel Wolf · Wülfrath, DE
• Elena Frick-Delaittre · Cologne, DE
• Kai Laemmerhold · Aachen, DE
• Claudine Rangheard · Munich, DE
• Timo Breuer · Kerpen, DE

Key dates

• Filing date: Sep 11, 2018
• Grant date: Apr 12, 2022
• Expiry date: Sep 11, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/831
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for producing thermoplastic polyoxazolidinone comprising copolymerization of a diisocyanate compound (A) with a bisepoxide compound (B) in the presence of a catalyst (C) and a compound (D) in a solvent (E), wherein the catalyst (C) is selected from the group consisting of alkali halogenides and earth alkali halogenides, and transition metal halogenides, compound (D) is selected from the group consisting of monofunctional isocyanate, monofunctional epoxide, and wherein the process comprises step (α) of placing the solvent (E) and the catalyst (C) in a reactor to provide a mixture, and adding the diisocyanate compound (A), the bisepoxide compound (B) and the compound (D) in step (β) to the mixture resulting from the step (α). The invention is also related to the resulting thermoplastic polyoxazolidinone.