OLEFIN POLYMERIZATION PROCESS

摘要

The present invention relates to a process for olefin polymerization, in particular for the preparation of ethylene or propylene homo or copolymers, which process comprises at least two polymerization stages, a relatively earlier of said stages comprising polymerizing an .alpha.-olefin in the presence of hydrogen and an -liganded olefin polymerization catalyst whereby to produce a first polymerization product, and a relatively later of said stages comprising polymerizing said .alpha.-olefin in the presence of an olefin polymerization catalyst whereby to yield a polymerization product having a lower MFR2 than said first polymerization product. The present invention further relates to the olefin polymer products of such a process.