HIGH FLOW AND HIGH STIFFNESS IMPACT COPOLYMER POLYPROPYLENE

摘要

The present invention relates to an impact copolymer polypropylene composition comprising a propylene homopolymer or copolymer matrix and an ethylene propylene rubber phase dispersed in the matrix, wherein the ethylene propylene rubber phase (PER) is present in an amount of 5-15 %wt, based on the total weight of the propylene homopolymer or copolymer matrix and the ethylene propylene rubber phase, the amount of ethylene in the ethylene propylene rubber (PER-C2) phase is 43-55 mol%, the intrinsic viscosity of the ethylene propylene rubber (PER-IV) phase is 3-7 dL/g, and the MFR₂ of the composition is 70-200 g/10min. The present invention also relates to a process for preparing the composition, use of the composition in injection molding and articles comprising the composition.