Compound catalyst system for synthesizing polyethylenes or copolymers of ethylene having bimodal or broad molecular weight distributions, process for preparing the same and use of the same

摘要

The present invention provides a compound the catalyst system used for the two types, or the synthesis of polyethylene or ethylene copolymer having a broad molecular weight distribution. This compound catalyst system is prepared by mixing the prior art compound catalyst system, an organic alcohol and an aluminoxane compound as the electron donor compounds which, as well as to significantly improve the activity of the catalyst system, the polyethylene having the two types, or a wide range of molecular weight distribution or enhance the activity of the two active centers which Kane synthesis of ethylene copolymers and, finally, provides a polymer having excellent processability and mechanical properties. Compound catalyst system and production method of the solid catalyst components used in the catalyst system of the present invention compounds are also disclosed.