Procatalyst composition with substitute 1,2-phenylene aromatic diester internal donor and method
View Patent ↗Disclosed are procatalyst compositions having an internal electron donor which include a substituted phenylene aromatic diester and optionally an electron donor component. Ziegler-Natta catalyst compositions containing the present procatalyst compositions exhibit high activity and produce propylene-based olefins with broad molecular weight distribution.
1. A procatalyst composition comprising:
a combination of a magnesium moiety, a titanium moiety and an internal electron donor comprising a substituted phenylene aromatic diester having the structure (I)
wherein R 1 -R 14 are the same or different, each of R 1 -R 14 is selected from the group consisting of hydrogen, a substituted hydrocarbyl group having 1 to 20 carbon atoms, an unsubstituted hydrocarbyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a heteroatom, and combinations thereof;
at least one of R 1 -R 4 is selected from the group consisting of a substituted hydrocarbyl group having 1 to 20 carbon atoms, an unsubstituted hydrocarbyl group having 1 to 20 carbon atoms, and combinations thereof; and
R 1 is a methyl group and R 3 is a t-butyl group.
2. The procatalyst composition of claim 1 wherein at least one of R 5 -R 14 is selected from the group consisting of a substituted hydrocarbyl group having 1 to 20 carbon atoms, an unsubstituted hydrocarbyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a heteroatom, and combinations thereof.
3. The procatalyst composition of claim 1 wherein R 2 and R 4 are hydrogen.
4. The procatalyst composition of claim 1 comprising an electron donor component selected from the group consisting of a phthalate, a benzoate, a diether, and combinations thereof.
5. A catalyst composition comprising:
a procatalyst composition comprising a substituted phenylene aromatic diester having the structure (I)
wherein R 1 is a methyl group and R 3 is a t-butyl group; and
a cocatalyst.
6. The catalyst composition of claim 5 comprising a member selected from the group consisting of an external electron donor, an activity limiting agent, and combinations thereof.