Patent · US Active

Method for the production of a thermoplastic polyoxazolidinone

US12378348B2 · kind B2 · utility

0Cited by

0References

20Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Sohajl Movahhed · Cologne, DE
Stefan Westhues · Aachen, DE
Daniel Thiel · Beckingen, DE
Kai Laemmerhold · Aachen, DE
Aurel Wolf · Wülfrath, DE
Christoph Guertler · Cologne, DE

Key dates

Filing date	Aug 17, 2021
Grant date	Aug 5, 2025
Priority date	—
Expiry date	Jul 13, 2042

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G59/4028
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for producing a thermoplastic polyoxazolidinone comprising copolymerizing a diisocyanate compound (A) with a bisepoxide compound (B) in the presence of a specific a quaternary ammonium, quaternary phoshonium and/or quaternary stibonium-based catalyst (C), a compound (D), a compound (F) wherein compound (D) and compound (F) independently comprises at least one of a monofunctional isocyanate, a monofunctional epoxide, a cyclic carbonate, a monofunctional alcohol, a monofunctional amine optionally in a solvent (E), and wherein the catalyst (C) is added in at least two portions (C-1) and (C-2). The invention is also related to the resulting thermoplastic polyoxazolidinone.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.