Olefin polymerization Ziegler-Natta catalyst components and process for the production of olefin polymers therewith

A solid catalyst component for the polymerization or co-polymerization of alpha-olefins comprising:

• titanium, magnesium, halogen, one or more internal electron donors, and one or more Si—N-bond-containing organosilicon compounds selected from the compound represented by the formula:
• RmSi(NR1R2)n(XR3)(4-m-n) [Formula I]
• wherein R, R1, R2 and R3, are independently selected from hydrogen, an aliphatic hydrocarbon group having 1 to 20 carbon atoms, an alicyclic hydrocarbon group having 3-20 carbon atoms, an aromatic hydrocarbon group having 6-20 carbon atoms, or a hydrocarbon group of 1 to 20 carbon atoms containing one or more hetero-atoms selected from the group consisting of N, O, S, Si, B, P, and halogen atoms;
• wherein X is O or S;
• wherein m is 0-3, n is 1-4, and m+n is 1-4;
• wherein when m>1, R's may be identical or different;
• wherein when n>1, R1's and R2's may be identical or different;
• and
• wherein when (4-m-n)>1, (XR3)'s may be identical or different.