公开(公告)号：DE2827764A1

公开(公告)日：1980-01-10

申请号：DE2827764

申请日：1978-06-24

Applicant: HOECHST AG

Inventor： DORRER BERNHARD DIPL CHEM DR ,  KLOOS FRIEDRICH DIPL PHYS DR

IPC: C08F8/50 ,  C08F210/06

公开(公告)号：DE2849114A1

公开(公告)日：1980-05-29

申请号：DE2849114

申请日：1978-11-11

Applicant: HOECHST AG

Inventor： DORRER BERNHARD DIPL CHEM DR ,  KLOOS FRIEDRICH DIPL PHYS DR ,  STRAMETZ HELMUT DIPL CHEM DR ,  NEUMANN HORST DIPL CHEM

IPC: C08L23/00 ,  C08L7/00 ,  C08L21/00 ,  C08L23/06 ,  C08L23/12 ,  C08L23/16 ,  C08L101/00 ,  C08L23/08 ,  C08L23/14

Abstract: A polypropylene molding composition of polypropylene, ethylene-propylene copolymer and polyethylene having a high hardness and increased impact strength and homogeneity after processing is obtained by way of a continuous three-stage polymerization, when the melt viscosities of the polymer mixtures obtained in the individual stages are in a determined ratio of one to the other.