Granted Patent B2

US 12,428,504 · App. 17/771,854 · Granted Sep 30, 2025

Inventors: Angela I. Padilla-Acevedo (Lake Jackson, TX); Andrew J. Young (Houston, TX); Roger L. Kuhlman (Lake Jackson, TX); Ruth Figueroa (Midland, MI); Susan Brown (Pearland, TX); Matthew E. Belowich (Midland, MI); David R. Neithamer (Midland, MI); Jerzy Klosin (Midland, MI); David M. Pearson (Lake Jackson, TX); Mari S. Rosen (Midland, MI); Bethany M. Neilson (Lake Jackson, TX); Johnathan E. DeLorbe (Lake Jackson, TX); Leslie E. O'Leary (Sugar Land, TX)

Assignee: Dow Global Technologies LLC

C08F4/65916C08F2/34C08F4/64193C08F10/02

Abstract

Claims (29)

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):

Assignments (1)

Continuity (2)

References Cited (30)