Process for producing polymers with multi-modal molecular weight distributions

摘要

The invention provides a continuous process for catalytically polymerizing a monomer feed of ethylene and at least one comonomer which comprises introducing a catalyst including a bulky ancillary ligand transition metal compound and monomer feed in an upstream reaction zone for polymerization, introducing further catalyst in a downstream reaction zone for further polymerization, the peak temperature in the downstream reaction zone being at least 50 DEG C. higher than in the upstream zone and being above 150 DEG C. The process economically produces polymer of good properties which is melt processable.