| abstract |
A catalyst for the (co)polymerization of α-olefins is provided, the catalyst comprising a product obtained by contacting the following components: (i) a solid catalyst component comprising Ti, Mg, Cl and an internal electron donor Bulk compounds, wherein the solid catalyst component contains 0.1 wt% to 50 wt% of Bi based on the total weight of the solid catalyst component; (ii) an alkylaluminum compound, and (iii) at least one external electron donor A compound having the following general formula: (R1)aSi(OR2)b, wherein R8 and R9 are independently selected from alkyl groups having 1 to 8 carbon atoms, and a is 0 or 1, a+b=4 . |