公开(公告)号：KR850001403B1

公开(公告)日：1985-09-30

申请号：KR820000938

申请日：1982-03-04

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASNUMA TATASHI ,  UCHIKAWA NOBUTAKA ,  SHIOMURA TEZUNOSUKE ,  FUJIO ECHIROO

IPC: C08F297/08 ,  C08F2/02 ,  C08F2/06 ,  C08F2/12

Abstract: An improved process for producing a propylene-ethylene block copolymer uses a stereo-specific catalyst(Ziegler-Natta Cat.). Multi- step polymerization of the propyrene-ethylene block copolymer is performed by the use of a connected reactor. In this polymerization, the solvent of one of the connected reactors is propyrene without using an inert solvent, and the reaction rates of ethylene/propyrene are different from each other. The title material has a high degree of strength.