Patent ID: 8604144

Claim:
A procatalyst composition comprising: a combination of a magnesium moiety, a titanium moiety and an internal electron donor comprising a substituted amide ester having the structure (II): R 1 -R 6 are the same or different, each of R 1 -R 6 is selected from the group consisting of hydrogen and a hydrocarbyl group having 1-20 carbon atoms, wherein at least one of R 1 -R 6 is a hydrocarbyl group having at least 2 carbon atoms, or each of R 3 and R 5 is a hydrocarbyl group having 1-20 carbon atoms; each of R 12 and R 22 is a hydrocarbyl group having 1-20 carbon atoms; and R 11 , R 13 , R 21 and R 23 are the same or different and selected from the group consisting of hydrogen and a hydrocarbyl group having 1-20 carbon atoms.