| 摘要 |
A continuous process for sequential polymerization of ethylene and propylene by first homopolymerizing propylene in a liquid medium comprising propylene monomer as major constituent and in the presence of a magnesiumchloride and titanium containing catalyst and then copolymerizing ethylene and propylene in the presence of a liquid medium, each of these reactions being effected in a stirred tank reactor, characterized in that the homopolymer slurry is transferred from the homopolymerization reactor to the copolymerization reactor through a pipe line reactor in which the residence time of the homopolymer slurry is at least 2.5 min. |
