Catalyst comprising a metallocene complex and co-catalyst

Patent metadata

Field	Value
Publication number	US-11040995-B2
Application number	US-201716067863-A
Country	US
Kind code	B2
Filing date	Jan 2, 2017
Priority date	Jan 5, 2016
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

The invention relates to a metallocene complex according to formula I or II wherein M is a metal selected from lanthanides or transition metals from group 3, 4, 5 or 6 of the Periodic System of the Elements, Q is an anionic ligand to M, k is the number of Q groups and equals the valence of M minus 2, R is a divalent bridging group, R1, R2, R3 and R4 are each independently chosen from the group consisting of hydrogen (H); a halogen atom; a silyl, alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl group; and R5, R6, R7 and R8 are each independently chosen from the group consisting of hydrogen (H); a halogen atom; a silyl, alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl group; or two adjacent radicals R5 and R6, R6 and R7, and R7 and R8 are connected with each other in a hydrocarbon ring system. The invention also relates to a catalyst comprising the metallocene complex, to a process for making polyolefins and to the use of the polyolefins for making articles.

First claim

The invention claimed is:

1. A metallocene complex according to formula I or II

wherein
M is a metal selected from lanthanides or transition metals from group 3, 4, 5 or 6 of the Periodic System of the Elements,
Q is an anionic ligand to M,
k is the number of Q groups and equals the valence of M minus 2,
R is a divalent bridging group, selected from a phenylene or biphenylene, which is unsubstituted or substituted with alkyl groups having 1 to 10 carbon atoms,
R 1 , R 2 , R 3 and R 4 are each independently chosen from the group consisting of hydrogen (H); a halogen atom; a silyl, alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl group; and
R 5 , R 6 , R 7 and R 8 are each independently chosen from the group consisting of hydrogen (H); a halogen atom; a silyl, alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl group; or two adjacent radicals R 5 and R 6 , R 6 and R 7 , and/or R 7 and R 8 are connected with each other in a hydrocarbon ring system.

2. The metallocene complex according to claim 1 , wherein R 6 and R 7 are connected and form together a ring system, such that a cyclopenta[a]naphthalene ligand or tetrahydrocyclopenta[a]naphthalene ligand is formed.

3. The metallocene complex according to claim 1 , wherein M is chosen from Ti, Zr and Hf.

4. The metallocene complex according to claim 1 , wherein Q is chosen from the group consisting of Cl or a methyl group.

5. The metallocene complex according to claim 1 , wherein the metallocene complex comprises two cyclopenta[a]naphthalene ligands or tetrahydrocyclopenta[a]naphthalene ligands and the bridging group R is connected to the 2-position of both ligands.

6. The metallocene complex according to claim 1 , wherein R is chosen from a group consisting of a 2,2′-biphenylene group or a substituted 2,2′-biphenylene group.

7. The metallocene complex according to claim 1 , Formula I or II

wherein
M is a metal selected from lanthanides or transition metals from group 3, 4, 5 or 6 of the Periodic System of the Elements,
Q is an anionic ligand to M,
k is the number of Q groups and equals the valence of M minus 2,
R is Y(Z)n, wherein Y is the bridging atom and is chosen from carbon, phosphorus, sulfur, silicon or germanium, Z is C1-C8 alkyl, C3-C10 cycloalkyl or C6-C10 aryl and n is 0, 1 or 2,
R 1 , R 2 , R 3 and R 4 are each independently chosen from the group consisting of hydrogen (H); a halogen atom; a silyl, alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl group; and
R 5 , R 6 , R 7 , and R 8 are each independently chosen from the group consisting of hydrogen (H); a halogen atom; a silyl, alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl group; or two adjacent radicals R 5 and R 6 , R 6 and R 7 , and/or R 7 and R 8 are connected with each other in a hydrocarbon ring system.

8. The metallocene complex according to claim 7 , wherein R is a —SiMe 2 or SiEt 2 bridge.

9. The metallocene complex according to claim 1 , wherein the metallocene is selected from the group consisting of complexes according to formulas III-XIII:

10. A catalyst for polymerizing olefins into polyolefins, wherein the catalyst is formed by reacting a metallocene complex according to claim 1 and a cocatalyst, wherein the cocatalyst is an aluminum or boron containing cocatalyst.

11. The catalyst according to claim 10 , wherein the catalyst comprises an inorganic support.

12. A process for polymerizing olefins, which comprises the steps of providing a polymerization reactor, providing at least one monomer, a metallocene complex according to claim 1 and a cocatalyst, and giving sufficient time to prepare a polyolefin under polymerization conditions.

13. The process according to claim 12 , wherein at least ethylene and an alpha-olefin are present as monomers to prepare a polyethylene.

14. A catalyst for polymerizing at least ethylene and an alpha-olefin to prepare a polyethylene, wherein the catalyst is formed by reacting a metallocene complex according to claim 9 and a cocatalyst, wherein the catalyst comprises an inorganic support and wherein the cocatalyst is an aluminoxane, an aluminum alkyl compound, a perfluorophenylborane or a perfluorophenylborate.

15. A process for polymerizing at least ethylene and an alpha-olefin to prepare a polyethylene, which comprises the steps of providing a polymerization reactor, providing at least one monomer, a metallocene complex as defined in claim 14 and the cocatalyst, and giving sufficient time to prepare the polyethylene under polymerization conditions.

Assignees

• Sabic Global Technologies Bv

Inventors

• Kulangara Shaneesh Vadake
• Friederichs Nicolaas Hendrika
• Ginzburg Anton
• Voskoboynikov Alexander
• Izmer Vyatcheslav
• Kononovich Dmitry
• Samsonov Oleg
• Vittoria Antonio
• Busico Vincenzo
• Cipullo Roberta
• Ghavale Ninad
• Nandurkar Nitin
• Borisov Ilya
• Guzeev Bogdan
• Uborsky Dmitry

Classifications

• C08F210/16 Primary

  Copolymers of ethene with alpha-alkenes, e.g. EP rubbers · CPC title

• C08F4/65927

  two cyclopentadienyl rings being mutually bridged · CPC title

• C07F17/00 Primary

  Metallocenes · CPC title