| abstract |
Solid catalyst components are disclosed including titanium, magnesium, halogen and an internal electron donor compound having a combination of internal electron donor compounds including at least one 1,8-naphthyl di ester and at least one secondary internal donor compound selected from alkyl 2-alkoxy-l -naphthoates, alkyl 2-alkoxybenzoates, alkyl 2,6- dialkoxybenzoates, (2-alkoxyphenyl)(pyrrolidin-l -yl)alkanones, dialkyl phthalates, alkyl alkionates, and dialkyl cyclohexane-l,2-dicarboxylates, and catalyst systems containing the catalyst solid components, organoaluminum compounds, and organosilicon compounds. Further, methods of making the catalyst components and the catalyst systems are disclosed as well as methods of polymerizing or copolymerizing alpha-olefins using the catalyst systems. |