Process for preparing heterophasic polymer compositions

The present invention provides a process for modifying a heterophasic polymer composition comprising the steps of providing a compatibilizer, providing a heterophasic polymer composition comprising a propylene polymer phase and an ethylene polymer phase, mixing the compatibilizer and the heterophasic polymer composition, and generating free radicals in the propylene phase and the ethylene phase. At least a portion of the compatibilizer is then reacted with the free radicals in both the propylene polymer phase and the ethylene polymer phase to form bonds with the propylene polymer in the propylene polymer phase and with the ethylene polymer in the ethylene polymer phase. 本发明提供用于对异相聚合物组合物进行改性的方法，包括以下步骤：提供相容剂，提供包含丙烯聚合物相和乙烯聚合物相的异相聚合物组合物，混合所述相容剂和所述异相聚合物组合物，以及在所述丙烯相和所述乙烯相中产生自由基。然后所述相容剂的至少一部分与所述丙烯聚合物相和所述乙烯聚合物相两者中的自由基反应，以与所述丙烯聚合物相中的丙烯聚合物形成键并与所述乙烯聚合物相中的乙烯聚合物形成键。