| abstract |
The present invention relates to a process for the preparation of impact modifiers, impact-modified thermoplastic mold compositions, particularly impact-modified polycarbonates or polycarbonate / polyester blends with improved resistance to degradation. More particularly, the present invention relates to a process for preparing a polymeric impact modifier having a core-shell structure produced by a multistage process, including, if necessary, control and regulation of pH values before and during the recovery step. |