Five-coordinate bis-phenylphenoxy catalysts for the preparation of ethylene-based polymers

Patent metadata

Field	Value
Publication number	US-10301412-B2
Application number	US-201515518672-A
Country	US
Kind code	B2
Filing date	Dec 2, 2015
Priority date	Dec 4, 2014
Publication date	May 28, 2019
Grant date	May 28, 2019

Abstract

The invention provides a molecular transition metal complex selected from Formula 1, as described herein; an ethylene-based polymer; and a process to form the ethylene-based polymer, said process comprising polymerizing ethylene in the presence of at least one molecular transition metal complex selected from Formula 1, as described herein, and wherein either Z 1 or Z 2 is dative covalent (coordinate) to the metal (M).

First claim

The invention claimed is:

1. A molecular transition metal complex represented by Formula 1:

wherein M is zirconium or hafnium, each independently being in a formal oxidation state of +4;
n is 2;
each X is independently a monoanionic ligand
Z 1 and Z 2 are each independently selected from —O— or —S—;
Y is a single atom bridge selected from the following: —CR 2 —, —GeR 2 —, —SiR 2 —, —PR—, —NR—; wherein each R is independently a hydrogen, a substituted or unsubstituted (C 1 -C 40 )hydrocarbyl, a substituted or unsubstituted (C 1 -C 40 )heterohydrocarbyl, or —OR C ;
R 1a , R 2a , R 3a , R 4a , R 1b , R 2b , R 3b , R 4b , R 6c , R 7c , R 8c , R 6d , R 7d , and R 8d are each, independently, selected from: a substituted or unsubstituted (C 1 -C 10 )alkyl, a halogen, or a hydrogen; and wherein each R C is independently a substituted or unsubstituted (C 1 -C 30 )hydrocarbyl, or a substituted or unsubstituted (C 1 -C 30 ) heterohydrocarbyl; and
R 5c and R 5d are each, independently, selected from the following groups g1) through g14):

and
wherein either Z 1 or Z 2 is dative covalent (coordinate) to M.

2. The molecular transition metal complex of claim 1 , wherein each Z is —O— (oxygen atom).

3. The molecular transition metal complex of claim 1 , wherein each X is independently an alkyl.

4. The molecular transition metal complex of claim 3 , wherein each X is independently a (C 1 -C 7 )alkyl.

5. The molecular transition metal complex of claim 1 , wherein Y is selected from the following: —CHR—, —CRR′—, —CR 2 —, —CH 2 —; and
wherein each R is independently an alkyl or an aryl, and
wherein each R′ is independently an alkyl or an aryl.

6. The molecular transition metal complex of claim 1 , wherein R 3a or R 3b are each, independently, selected from a halogen, an amine, alkoxy, or an alkyl.

7. The molecular transition metal complex of claim 1 , wherein R 1a , R 2a , R 4a , R 1b , R 2b , R 4b , R 6c , R 8c , R 6d and R 8d are each hydrogen.

8. A process to form an ethylene-based polymer, said process comprising polymerizing a mixture comprising ethylene, and optionally at least one comonomer, in the presence of at least one molecular transition metal complex of claim 1 , which is rendered catalytically active by contacting it to, or combining it with, an activating cocatalyst.

9. A catalyst system comprising one or more than one procatalyst having a structure according to any of a) through ee):

Assignees

• Dow Global Technologies Llc

Inventors

• Klosin Jerzy
• Szuromi Endre
• Spencer Liam P

Classifications

• B01J2531/48

  Zirconium · CPC title

• C07F7/00 Primary

  Compounds containing elements of Groups 4 or 14 of the Periodic Table · CPC title

• C08F2/38

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

• C08F10/02

  Ethene · CPC title

• B01J2540/40

  Non-coordinating groups comprising nitrogen · CPC title