Procatalyst composition with adamantane and method
Disclosed are procatalyst compositions having an internal electron donor which includes an adamantane dicarboxylate and optionally an additional electron donor component. Ziegler-Natta catalyst compositions containing the present procatalyst compositions to 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 an adamantane dicarboxylate.
2. The procatalyst composition of claim 1 wherein the magnesium moiety is a magnesium halide.
3. The procatalyst composition of claim 1 wherein the titanium moiety is a titanium halide.
4. The procatalyst composition of claim 1 wherein the adamantane dicarboxylate has the structure (III):
wherein R 1 -R 2 are the same or different, each of R 1 and R 2 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.
5. The procatalyst composition of claim 4 wherein at least one of R 1 and R 2 is a primary alkyl group.
6. The procatalyst composition of claim 4 wherein R 1 and R 2 are the same or different and each is selected from the group consisting of a C 1 -C 6 alkyl group.
7. The procatalyst composition of claim 4 wherein R 1 and R 2 are the same or different and each is selected from the group consisting of a methyl group, an ethyl group, a n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a n-hexyl group, and combinations thereof.
8. The procatalyst composition of claim 1 wherein the internal electron donor comprises:
a mixed internal electron donor which comprises the adamantane dicarboxylate and an electron donor component.
9. The procatalyst composition of claim 8 wherein the electron donor component is selected from the group consisting of a benzoate, a phthalate, a diether, a diol ester, a silyl diol ester, a succinate, and combinations thereof.
10. A catalyst composition comprising:
the procatalyst composition of claim 1 ; and
a cocatalyst.
11. The catalyst composition of claim 10 wherein the adamantane dicarboxylate has the structure (III):
wherein R 1 -R 2 are the same or different, each of R 1 and R 2 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.
12. The catalyst composition of claim 10 wherein R 1 and R 2 are each a C 1 -C 6 alkyl group.
13. The catalyst composition of claim 10 wherein the internal electron donor further comprises an electron donor component selected from the group consisting of a benzoate, a phthalate, a diether, a diol ester, a silyl diol ester, a succinate, and combinations thereof.
14. The catalyst composition of claim 10 comprising a member selected from the group consisting of an external electron donor, a mixed external electron donor, an activity limiting agent, and combinations thereof.
15. The catalyst composition of claim 14 wherein the external electron donor comprises an alkoxysilane.
16. The catalyst composition of claim 14 comprising an external electron donor selected from the group consisting of dicyclopentyldimethoxysilane, methylcyclohexyldimethoxysilane, n-propyltrimethoxysilane, and combinations thereof.
17. The catalyst composition of claim 14 comprising an activity limiting agent selected from the group consisting of a carboxylic acid ester, a diether, a poly(alkene glycol), a diol ester, and combinations thereof.
18. A process for producing an olefin-based polymer comprising:
contacting, under polymerization conditions in a reactor, an olefin with the catalyst composition of claim 10 ; and
forming an olefin-based polymer.
19. The process of claim 18 wherein the olefin is propylene, the process comprising forming a propylene-based polymer having a polydispersity index from about 5.0 to about 15.0.
20. The process of claim 18 wherein the olefin is propylene, the process comprising forming a propylene-based polymer;
containing, under polymerization conditions in another reactor, ethylene and optionally at least one other olefin in the presence of the propylene-based polymer; and
forming a propylene impact copolymer.