| abstract |
In a process for producing a prepolymer epoxy resin mixture with oxazolidinone structures, an insoluble reaction resin powder which has no isocyanate groups and consists of an epoxy resin mixture containing a reaction accelerator and filler and having isocyanate structures, is fed to a continuously working reactor and reacted at temperatures up to 200 DEG C, with reactor temperature at 140-190 DEG C, and then the extruded material is cooled down to a temperature of < 50 DEG C with the aid of a cooling device mounted at the extrusion die outlet of the reactor. |