Biphenylphenol polymerization catalysts

Patent metadata

Field	Value
Publication number	US-12428504-B2
Application number	US-202017771854-A
Country	US
Kind code	B2
Filing date	Nov 4, 2020
Priority date	Nov 4, 2019
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

Embodiments are directed towards the use of a supported biphenylphenol polymerization catalyst made from a biphenylphenol polymerization precatalyst of Formula I via a gas-phase or slurry-phase polymerization process under gas-phase or slurry-phase polymerization conditions to make a polymer.

First claim

What is claimed is:

1. A method of making a bimodal polyethylene composition, the method comprising: polymerizing ethylene in a single gas-phase polymerization reactor under gas-phase polymerization conditions in presence of a supported biphenylphenol polymerization catalyst to make the bimodal polyethylene composition without help from any other polymerization catalyst; wherein the bimodal polyethylene composition comprises a high molecular weight polyethylene component and a low molecular weight polyethylene component, further wherein the supported biphenylphenol polymerization catalyst is made according to the following method:
disposing a biphenylphenol polymerization precatalyst of Formula I on a support to give a supported biphenylphenol polymerization precatalyst; and
contacting, under activating conditions, the supported biphenylphenol polymerization precatalyst with an activator so as to activate the supported biphenylphenol polymerization precatalyst, thereby making the supported biphenylphenol polymerization catalyst,

wherein each of R 7 and R 8 independently is a C 1 alkyl, halogen, or a hydrogen;
wherein each of R 5 and R 10 independently is a C 1 to C 20 alkyl, aryl aralkyl, halogen, or a hydrogen;
wherein each of R 4 and R 11 independently is a halogen or a hydrogen;
wherein each of R 2 and R 13 independently is a C 1 to C 20 alkyl, aryl of aralkyl or a hydrogen;
wherein each of R 15 and R 16 independently is a 2,7-disubstituted carbazol-9-yl or a 3,6-disubstituted carbazol-9-yl;
wherein L is a C 3 or C 4 alkylene that forms a 3-carbon bridge or 4-carbon bridge, respectively, between the two oxygen atoms to which L is covalent bonded;
wherein each of R 1 , R 3 , R 12 , and R 14 is a hydrogen;
wherein each of R 6 and R 9 is a hydrogen or C 1 -C 8 alkyl; optionally, R 6 can be linked with R 7 and R 8 can be linked to R 9 to form a cyclic structure;
wherein each X independently is a halogen, a hydrogen, a (C 1 -C 20 )alkyl, a (C 7 -C 20 )aralkyl, a (C 1 -C 6 )alkyl-substituted (C 6 -C 12 )aryl, or a (C 1 -C 6 )alkyl-substituted benzyl, —CH 2 Si(R C ) 3 , where R C is C 1 -C 12 hydrocarbon; and
wherein M is Zr or Hf.

2. The method of claim 1 in which the bimodal polyethylene composition has a polydispersity index (PDI) in a range from 5 to 40 or 7 to 40.

3. A method of making a unimodal polyethylene composition, the method comprising:
polymerizing ethylene in a single slurry-phase polymerization reactor under slurry-phase polymerization conditions in presence of a supported biphenylphenol polymerization catalyst to make the polyethylene composition without help from any other polymerization catalyst, wherein the unimodal polyethylene composition has a polydispersity index (PDI) in a range from 5 to 40 or 7 to 40, further wherein, the supported biphenylphenol polymerization catalyst is made according to the following method:
disposing a biphenylphenol polymerization precatalyst of Formula I on a support to give a supported biphenylphenol polymerization precatalyst; and
contacting, under activating conditions, the supported biphenylphenol polymerization precatalyst with an activator so as to activate the supported biphenylphenol polymerization precatalyst, thereby making the supported biphenylphenol polymerization precatalyst,

wherein each of R 7 and R 8 independently is a C 1 alkyl, halogen, or a hydrogen;
wherein each of R 5 and R 10 independently is a C 1 to C 20 alkyl, aryl aralkyl, halogen, or a hydrogen;
wherein each of R 4 and R 11 independently is a halogen or a hydrogen;
wherein each of R 2 and R 13 independently is a C 1 to C 20 alkyl, aryl of aralkyl or a hydrogen;
wherein each of R 15 and R 16 independently is a 2,7-disubstituted carbazol-9-yl or a 3,6-disubstituted carbazol-9-yl;
wherein L is a C 3 or C 4 alkylene that forms a 3-carbon bridge or 4-carbon bridge, respectively, between the two oxygen atoms to which L is covalent bonded;
wherein each of R 1 , R 3 , R 12 , and R 14 is a hydrogen;
wherein each of R 6 and R 9 is a hydrogen or C 1 -C 8 alkyl; optionally, R 6 can be linked with R 7 and R 8 can be linked to R 9 to form a cyclic structure;
wherein each X independently is a halogen, a hydrogen, a (C 1 -C 20 )alkyl, a (C 7 -C 20 )aralkyl, a (C 1 -C 6 )alkyl-substituted (C 6 -C 12 )aryl, or a (C 1 -C 6 )alkyl-substituted benzyl, —CH 2 Si(R C ) 3 , where R C is C 1 -C 12 hydrocarbon; and
wherein M is Zr or Hf.

4. A biphenylphenol polymerization precatalyst selected from the group consisting of structures (i), (ii), (iii), and (v):

Assignees

• Dow Global Technologies Llc

Inventors

• Padilla-Acevedo Angela I
• Young Andrew J
• Kuhlman Roger L
• Figueroa Ruth
• Brown Susan
• Belowich Matthew E
• Neithamer David R
• Klosin Jerzy
• Pearson David M
• Rosen Mari S
• Neilson Bethany M
• Delorbe Johnathan E
• O'Leary Leslie E

Classifications

• C08F2/34

  Polymerisation in gaseous state · CPC title

• C08F10/02 Primary

  Ethene · CPC title

• C08F4/64193

  OOOO · CPC title

• C08F2500/055

  Monomodal/unimodal molecular weight distribution · CPC title

• C08F2500/05

  Bimodal or multimodal molecular weight distribution · CPC title