POLYPROPYLENE MOLDING COMPOSITION AND PROCESS FOR ITS PREPARATION

摘要

POLYPROPYLENE MOLDING COMPOSITION AND PROCESS FOR ITS PREPARATION of the disclosure A polypropylene molding composition having an excellent impact strength at a temperature down to -60.degree.C and simultaneously a good hardness contains of from 70 to 90% by weight of a polypropylene, 2 to 10% by weight of an ethylene propylene copolymer and of from 8 to 25% by weight of a polyethylene and is distinguished by a melt index MFI 230/5 lower than that of the polypropylene contained therein and simultaneously superior by the coefficient 1.3 to 7.0 to that of a polypropylene prepared in the presence of the same catalyst as the molding composition and having the same RSV(reduced specific viscosity)