METHOD FOR THE PRODUCTION OF EPOXY-GROUP TERMINATED POLYOXAZOLIDINONES

• Main Authors: Schlundt, Waldemar, Wolf, Aurel, Guertler, Christoph, Laemmerhold, Kai, Glassner, Mathias, Reimann, Yvonne, Frick-Delaittre, Elena, Thiel, Daniel, Westhues, Stefan, Koopmans, Carsten, Weikard, Jan
• Format: Patent
• Language: English
• Published: 21.07.2022
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

A process for producing an epoxy-group terminated polyoxazolidinone comprising the copolymerization of a polyisocyanate compound (A) with two or more isocyanate groups with a polyepoxide compound (B) with two or more epoxy groups in the presence of a specific catalyst (C), wherein the molar ratio of the epoxy groups of the polyepoxide compound (B) to the isocyanate groups of the polyisocyanate compound (A) is from 2.6:1 and less than 25:1, and wherein the copolymerization is operated in the absence of an additional solvent (D-1) with a boiling point higher than 170° C., preferred higher than 165° C., more preferred higher than 160° C., and most preferred higher than 150° C. at 1 bar (absolute). The epoxy-group terminated polyoxazolidinones resulting from the process are also provided.