Abstract: The present invention relates to a composition for producing a thermoplastic molding compound containing A) at least one aromatic polycarbonate and/or aromatic polyester carbonate containing at least 500 ppmw of phenolic OH groups, wherein the weight-average molecular weight Mw of component A determined by gel permeation chromatography at room temperature in dichloromethane as solvent using a polycarbonate calibration standard is in the range from 15 000 to 40 000 g/mol, B) at least one copolymer containing structural units derived from methyl methacrylate and 0.

Abstract: The invention relates to a polymer blend of at least one thermoplastic component and a further crosslinked, polymeric component, in which this further component is formed in situ in an extruder or kneader during the melt compounding of the thermoplastic component(s) by polyaddition or polycondensation reaction of starting components containing functional groups. The invention also relates to a process for producing the polymer blend, to the use of the polymer blend for the production of shaped bodies and to the shaped bodies themselves.