Silyl-bridged bis-biphenyl-phenoxy catalysts for olefin polymerization

Patent metadata

Field	Value
Publication number	US-11111318-B2
Application number	US-201716317996-A
Country	US
Kind code	B2
Filing date	Jul 28, 2017
Priority date	Jul 29, 2016
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

Embodiments are directed to a metal complex formed, wherein the metal complexes are used as pro-catalyst in polyolefin polymerization and comprise the following structure (Formula (I)).

First claim

The invention claimed is:

1. A polymerization process for producing an ethylene-based polymer comprising:
polymerizing ethylene and at least one additional α-olefin in the presence of a catalyst system, wherein the catalyst system comprises a pro-catalyst defined by the metal ligand complex of formula (I):

where:
M is titanium, zirconium, or hafnium, each independently being in a formal oxidation state of +2, +3, or +4; and n is an integer of from 0 to 3, and wherein when n is 0, X is absent; and
each X independently is a monodentate ligand that is neutral, monoanionic, or dianionic; or two Xs are taken together to form a bidentate ligand that is neutral, monoanionic, or dianionic;
the metal ligand complex of formula (I) is, overall, neutral;
each Z independently is O;
R 1-7 and R 10-16 are selected from the group consisting of a (C 1 -C 40 )hydrocarbyl, (C 1 -C 40 )heterohydrocarbyl, —Si(R C ) 3 , halogen atom, hydrogen atom, and combinations thereof;
R 8 and R 9 are hydrogen atoms;
R 23 and R 24 are —CH 2 —;
R 17-22 are independently selected from a hydrogen atom and a (C 1 -C 40 )hydrocarbyl, wherein the sum of the non-hydrogen atoms for R 17-19 is larger than 1, and/or the sum of the non-hydrogen atoms for R 20-22 is larger than 1 and optionally two or more groups selected from R 17-22 can combine together to form a ring structure, with such ring structures having from 3 to 50 atoms in the ring, excluding any hydrogen atoms;
at least one of R 1 and R 16 or both of R 1 and R 16 radicals selected from formula (II), formula (III), and formula (IV):

R 31-35 , R 41-44 , and R 51-59 are independently chosen from a (C 1 -C 40 )hydrocarbyl, (C 1 -C 40 )heterohydrocarbyl, —Si(R C ) 3 , halogen atom, hydrogen atom, and combinations thereof; and
each R C is independently selected from (C 1 -C 30 )hydrocarbyl.

2. The polymerization process according claim 1 , wherein the catalyst system further comprises at least one cocatalyst.

3. The polymerization process according to claim 1 , wherein R 1 and R 16 are the same.

4. The polymerization process according to claim 1 , wherein (1) two of R 17-19 and two of R 20-22 are members in a C 5 -C 6 cycloalkyl ring structure or (2) two of R 17-19 or two of R 20-22 are members in a C 5 -C 6 cycloalkyl ring structure.

5. The polymerization process according to claim 1 , wherein at least one of R 1 and R 16 is formula (III) and at least one R 42 and R 43 is tert-butyl.

6. The polymerization process according to claim 1 , wherein at least one of R 1 and R 16 is formula (III) and R 41 and R 44 are hydrogen atoms.

7. The polymerization process according to claim 1 , wherein at least one of R 1 and R 16 is formula (IV).

8. The polymerization process according to claim 1 , wherein two of R 17-19 or two of R 20-22 are methyl groups.

9. The polymerization process according to claim 1 , wherein two of R 17-19 and two of R 20-22 are methyl groups.

10. The polymerization process according to claim 1 , wherein two of R 17-19 and two of R 20-22 are not hydrogen atoms.

Assignees

• Dow Global Technologies Llc

Inventors

• Do Hien Q
• Fontaine Philip P
• Young Andrew J
• Brown Susan G
• Delorbe Johnathan E
• Vaidya Tulaza
• Rickaway Zach T
• Floeck (Nee Duchnowski) Amy E
• Zhang Chunming
• Figueroa Ruth
• Klosin Jerzy

Classifications

• C08F2500/08

  Low density, i.e. < 0.91 g/cm3 · CPC title

• C08F2500/03

  Narrow molecular weight distribution, i.e. Mw/Mn < 3 · CPC title

• C08F210/16 Primary

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

• C08F2/38

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

• C08F4/64193 Primary

  OOOO · CPC title