| abstract |
The present invention relates to a catalyst system comprising a solid catalyst component comprising titanium, magnesium, halogen and 1,8-naphthyl diaryloate internal electron donor compound, an organoaluminum compound, and an alkyl benzoate derivative as an external electron donor. The invention also relates to a method for producing a catalyst system, as well as a method for polymerizing or copolymerizing alpha-olefins using the catalyst system. [Selection figure] None |