Olefin polymerization catalyst

Patent metadata

Field	Value
Publication number	US-10975172-B2
Application number	US-201716089525-A
Country	US
Kind code	B2
Filing date	Mar 30, 2017
Priority date	Mar 31, 2016
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

An olefin polymerization catalyst system comprising: a procatalyst component comprising a metal-ligand complex of Formula (I) wherein each X is independently a monodentate or polydentate ligand that is neutral, monoanionic, or dianionic, wherein n is an integer, and wherein X and n are chosen such that the metal-ligand complex of Formula (I) is overall neutral; wherein each R1 and R5 independently is selected from (C1-C40)hydrocarbyls, substituted (C1-C40)hydrocarbyls; (C1-C40)heterohydrocarbyls and substituted (C1-C40)heterohydrocarbyls; wherein each R2 and R4 independently is selected from (C1-C40)hydrocarbyls and substituted (C1-C40)hydrocarbyls; wherein R3 is selected from the group consisting of a (C3-C40)hydrocarbylene, substituted (C3-C40)hydrocarbylene, [(C+Si)3-(C+Si)40]organosilylene, substituted [(C+Si)3-(C+Si)40]organosilylene, [(C+Ge)3-(C+Ge)40]organogermylene, or substituted [(C+Ge)3-(C+Ge)40]organogermylene; wherein each N independently is nitrogen; and optionally, two or more R1-5 groups each independently can combine together to form mono-aza ring structures, with such ring structures having from 5 to 16 atoms in the ring excluding any hydrogen atoms.

First claim

The invention claimed is:

1. An olefin polymerization catalyst system comprising:
a procatalyst component comprising a metal-ligand complex of Formula (I):

where:
M is titanium, zirconium, or hafnium;
each X is independently a monodentate or polydentate ligand that is neutral, monoanionic, or dianionic, wherein n is an integer, and wherein X and n are chosen in such a way that the metal-ligand complex of Formula (I) is overall neutral;
R 1 and R 5 are independently a (C 6 -C 40 )aryl or substituted (C 6 -C 40 )aryl group;
each R 2 and R 4 independently is selected from a group consisting of (C 1 -C 40 )hydrocarbyls and substituted (C 1 -C 40 )hydrocarbyls;
R 3 is selected from the group consisting of a (C 3 -C 40 )hydrocarbylene, substituted (C 3 -C 40 )hydrocarbylene, [(C+Si) 3 -(C+Si) 40 ] organosilylene, substituted [(C+Si) 3 -(C+Si) 40 ] organosilylene, [(C+Ge) 3 -(C+Ge) 40 ] organogermylene, and substituted [(C+Ge) 3 -(C+Ge) 40 ] organogermylene such that there are at least three atoms in the shortest R 3 chain connecting the bridged N atoms of Formula (I);
each N independently is nitrogen; and
optionally, two or more R 1-5 groups each independently can combine together to form mono-aza ring structures, with such ring structures having from 5 to 16 atoms in the ring excluding any hydrogen atoms.

2. The olefin polymerization catalyst system according to claim 1 , wherein each X independently is Me, Bn, or Cl.

3. The olefin polymerization catalyst system according to claim 1 , wherein R 3 is an optionally substituted 5 atom bridge such that 5 atoms define the shortest chain connecting the bridged N atoms of Formula (I).

4. The olefin polymerization catalyst system according to claim 1 , wherein R 3 is an optionally substituted 5 atom bridge such that 5 atoms define the shortest chain connecting the bridged N atoms of Formula (I) and R 1 and R 5 are each independently a (C 6 -C 40 )aryl or substituted (C 6 -C 40 )aryl group.

5. The olefin polymerization catalyst system according to claim 1 , wherein R 2 and R 4 are each independently a methyl group.

6. The olefin polymerization catalyst system according to claim 1 , wherein R 2 and R 4 are methyl groups, R 3 is a 5 atom bridge such that 5 atoms define the shortest chain connecting the bridged N atoms of Formula (I) and R 1 and R 5 is a (C 6 -C 40 )aryl or substituted (C 6 -C 40 )aryl group.

7. The olefin polymerization catalyst system according to claim 1 , wherein said metal-ligand complex of Formula (I) is selected from the group consisting of the compounds represented by the following structures

8. The olefin polymerization catalyst system according to claim 1 comprising a pro-catalyst of structure (II)

wherein R a -R h are hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl, substituted heterohydrocarbyl, aryl, heteroaryl, alkyl, substituted alkyl, perfluoro alkyl, organosilyl, halogen or hydrogen groups.

9. The olefin polymerization catalyst system according to claim 8 wherein R a and R h are aryl and substituted aryl groups.

10. The olefin polymerization catalyst system according to claim 1 , wherein said metal-ligand complex of Formula (I) is selected from the group consisting of

11. The olefin polymerization catalyst system according to claim 1 wherein M is zirconium or hafnium.

12. An olefin-based polymer comprising the polymerization reaction of one or more olefin monomers in the presence of the one or more olefin polymerization catalyst systems according to claim 1 .

13. An olefin-based polymer comprising the polymerized reaction product of one or more olefin monomers in the presence of the one or more olefin polymerization catalyst systems according to claim 1 and one or more olefin polymerization catalysts.

14. The olefin-based polymer according to claim 12 wherein at least one of the olefin monomers is ethylene.

15. The olefin-based polymer according to claim 12 wherein one or more of the olefin monomers is selected from the group consisting of linear alpha-olefins having from 3 to 12 carbons, branched alpha-olefins having from 5 to 16 carbons, and combinations thereof.

16. A process for polymerizing one or more olefin-based polymers comprising the steps of polymerizing one or more olefin monomers in the presence of the one or more olefin polymerization catalyst systems according to claim 1 .

17. The process for polymerizing one or more olefin-based polymers according to claim 16 wherein the polymerizing further occurs in the presence of an activator selected from MMAO, bis(hydrogenated tallow alkyl)methylammonium tetrakis(pentafluorophenyl)borate, or tris(pentafluorophenyl)borane.

18. The process for polymerizing one or more olefin-based polymers according to claim 16 wherein the polymerizing further occurs in the presence of a chain transfer agent.

19. The process for polymerizing one or more olefin-based polymers according to claim 18 wherein the chain transfer agent is dialkylzinc, trialkylaluminum, or hydrogen.

Assignees

• Dow Global Technologies Llc

Inventors

• Bailey Brad C
• Christianson Matthew D
• Davis Anna V
• Camelio Andrew M
• Froese Robert D J
• Klinkenberg Jessica L

Classifications

• C08F2/38

  Polymerisation using regulators, e.g. chain terminating agents {, e.g. telomerisation} · CPC title

• C08F2410/01

  Additive used together with the catalyst, excluding compounds containing Al or B · CPC title

• C08F210/04

  Monomers containing three or four carbon atoms · CPC title

• C08F4/64186 Primary

  Dianionic ligand · CPC title

• C08F4/64168 Primary

  Tetra- or multi-dentate ligand · CPC title