Bis-ligated phosphaguanidine group IV metal complexes and olefin polymerization catalysts produced therefrom

Patent metadata

Field	Value
Publication number	US-11214632-B2
Application number	US-201716338209-A
Country	US
Kind code	B2
Filing date	Sep 29, 2017
Priority date	Sep 30, 2016
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

Embodiments are directed to monophosphaguanidine ligands and the bis ligated metal-complexes formed therefrom, wherein the metal-ligand complexes are polymerization catalysts comprising the following structure (I).

First claim

The invention claimed is:

1. A metal-ligand complex comprising the phosphaguanidine compound of formula I

where:
R 1 , R 5 , R 6 , and R 10 are independently selected from hydride, aliphatic, heteroaliphatic, aromatic, and heteroaromatic moieties;
R 2 , R 3 , R 7 , and R 8 include the same or different moieties independently selected from aliphatic moieties, aromatic moieties, and heteroaromatic moieties;
R 4 and R 9 are independently a lone pair of electrons;
M is titanium, zirconium, or hafnium;
each X is independently selected from aliphatic moieties, aromatic moieties, NR N 2 moeities or halide moieties, wherein R N is selected from alkyl, aryl, and heteroaryl moieties; and
each dotted line optionally defines a bridging connection.

2. The metal-ligand complex of claim 1 , wherein each R 1 , R 5 , R 6 , and R 10 are independently selected from hydride, methyl, ethyl, iso-propyl, cyclohexyl, tert-butyl, neopentyl, phenethyl, benzyl, adamantyl, phenyl, 2,6-di-iso-propylphenyl, and 2,6-dimethylphenyl.

3. The metal-ligand complex of claim 1 , wherein R 2 , R 3 , R 7 , and R 8 are independently selected from ethyl, cyclohexyl, phenyl, and 4-methoxyphenyl.

4. The metal-ligand complex of claim 1 , wherein each X independently is selected from a methyl, trimethylsilylmethyl (—CH 2 SiMe 3 ), benzyl, chloro, and dimethylamido (NMe 2 ) group.

5. The metal-ligand complex of claim 1 , wherein M is zirconium.

6. The metal-ligand complex of claim 1 , wherein M is hafnium.

7. A polymerization catalyst system comprising the metal-ligand complex according to claim 1 , wherein the polymerization catalyst system further comprises a chain transfer agent.

8. The polymerization catalyst system according to claim 7 , wherein the chain transfer agent is diethyl zinc.

Assignees

• Dow Global Technologies Llc

Inventors

• Camelio Andrew M
• Krasovskiy Arkady L
• Christianson Matthew D
• Hazari Amaruka
• Spinney Heather
• Froese Robert D J

Classifications

• C08F210/16 Primary

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

• C08F4/64044

  NN · CPC title

• C08F2/38

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

• C08F10/02 Primary

  Ethene · CPC title

• C08F2500/01

  High molecular weight, e.g. >800,000 Da. · CPC title