Procatalyst composition with substituted amide ester internal electron donor
View Patent ↗Disclosed are procatalyst compositions having an internal electron donor which includes a substituted amide ester and optionally an electron donor component. Ziegler-Natta catalyst compositions containing the present procatalyst compositions exhibit improved catalyst activity and/or improved catalyst selectivity 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 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.
2. The procatalyst composition of claim 1 wherein at least two of R 1 -R 6 are a hydrocarbyl group having at least 2 carbon atoms.
3. The procatalyst composition of claim 1 wherein each of R 1 and R 2 is a hydrocarbyl group with at least two carbon atoms.
4. The procatalyst composition of claim 1 wherein at least one of R 11 , R 13 , R 21 and R 23 is a hydrocarbyl group having 1-20 carbon atoms.
5. The procatalyst composition of claim 1 wherein each of R 1 and R 2 is are selected from the group consisting of an isopropyl group, an isobutyl group, a sec-butyl group, a cyclopentyl group, and a cyclohexyl group.
6. The procatalyst composition of claim 1 wherein each of R 1 , R 2 , R 4 , and R 6 is hydrogen and each of R 3 and R 5 is a methyl group.
7. The procatalyst composition of claim 1 comprising a mixed external electron donor comprising the substituted amide ester of structure (II) and an electron donor component.
8. A catalyst composition comprising:
a procatalyst composition of claim 1 ; and
a cocatalyst.
9. The catalyst composition of claim 8 comprising an external electron donor selected from the group consisting of a silicon compound, a bidentate compound, a diether, a diol ester, a carboxylate, an amine, a phosphite, and combinations thereof.
10. The catalyst composition of claim 8 comprising two or more alkoxysilane external electron donors.
11. The catalyst composition of claim 8 comprising an activity limiting agent selected from the group consisting of a carboxylic acid ester, a diether, a diol ester, and combinations thereof.
12. A process for producing an olefin-based polymer comprising:
contacting, under polymerization conditions, an olefin with a catalyst composition comprising a procatalyst composition of claim 1 ; and
forming an olefin-based polymer comprising a substituted amide ester.
13. The process of claim 12 wherein the olefin is propylene, the process comprising forming a propylene-based polymer having a polydispersity index from about 5.0 to about 20.0.