Blends of poly(butadiene-g-polystyrene-co-acrylonitrile) (ABS) with polycarbonate (PC) are some of the most successful multiphase materials, with applications in the automotive and electronics industries. The mechanical properties of the complete incompatible blends are mainly determined by the interaction between the poly(styrene-co-acrylonitrile) (S/AN) component of the ABS and the PC as well as through the dispersion of the elastomeric component poly(butadiene) in the thermoplastic S/AN-matrix. The aim of our work is to optimize the modification process by the use of new substituted amino alcohols and amino phenols, as well as the use of a more efficient catalyst. Both reactive and non reactive compatibilization of polymer blends should be performed with the new ABS-modifications.