Subramaniam Kuppuswamy

US Patent:

20220275015, Sep 1, 2022

Filed:

Jul 28, 2020

Appl. No.:

17/631870

Inventors:

- Baytown TX, US
Charles J. Harlan - Houston TX, US
Subramaniam Kuppuswamy - Mont Belvieu TX, US
Matthew S. Bedoya - Humble TX, US

International Classification:

C07F 17/00
C08F 210/16

Abstract:

The present disclosure provides metallocene catalyst compounds including at least one —Si— containing linker, catalyst systems including such compounds, and uses thereof. Catalyst compounds of the present disclosure can be hafnium-containing compounds having one or more cyclopentadiene ligand(s) substituted with one or more silyl neopentyl groups and linked with at least one —Si-containing linker. In another class of embodiments, the present disclosure is directed to polymerization processes to produce polyolefin polymers from catalyst systems including one or more olefin polymerization catalysts, at least one activator, and an optional support.

US Patent:

20210246155, Aug 12, 2021

Filed:

Jun 20, 2019

Appl. No.:

17/252980

Inventors:

- Baytown TX, US
Matthew W. Holtcamp - Huffman TX, US
Subramaniam Kuppuswamy - Mont Belvieu TX, US
Steven C. Haas - Manvel TX, US

International Classification:

C07F 17/00

Abstract:

A process to synthesize a Group 4 ansa-metallocene. The process includes reacting an alkaline earth metal dianion dicyclopentadiene ligand-Lewis base complex with a Group 4 metal tetrahalide in the presence of an alkali metal halide, and forming the Group 4 ansa-metallocene dihalide with high yield and purity.

US Patent:

20210079137, Mar 18, 2021

Filed:

Nov 5, 2020

Appl. No.:

17/090497

Inventors:

Matthew W. Holtcamp - Huffman TX, US
Subramaniam Kuppuswamy - Mont Belvieu TX, US
Matthew S. Bedoya - Humble TX, US
Kevin A. Stevens - Houston TX, US

International Classification:

C08F 210/02

Abstract:

A metallocene catalyst compound can comprise a structure represented by formula (F-MC) below comprising a first cyclopentadienyl ring with carbon atoms directly connected with R, R, R, and R, and a second cyclopentadienyl ring with carbon atoms directly connected with R, R, R, and R, and a bridging group (BG) directly connecting the first and second cyclopentadienyl ringsA catalyst system can include the metallocene compound, a non-coordinating anion type activator comprising a supported alumoxane or aluminum alkyl, and optionally a scavenger. A process for making a polymeric product can comprise: contacting a C-Calpha-olefin feed with the catalyst system to obtain a polymerization reaction mixture; and obtaining a polymer product from the polymerization reaction mixture. A polymer product can be made by the process to exhibit at least an Mn from 7,000 g/mol to 70,000 g/mol and a PDI from 4.1 to 9.0.

US Patent:

20210054111, Feb 25, 2021

Filed:

Nov 5, 2020

Appl. No.:

17/090523

Inventors:

- Baytown TX, US
Subramaniam Kuppuswamy - Mont Belvieu TX, US
Matthew S. Bedoya - Humble TX, US
Kevin A. Stevens - Houston TX, US
Ching-Tai Lue - Sugarland TX, US
Hasnain Rangwalla - Katy TX, US

International Classification:

C08F 4/6592
C08F 210/16
C08F 4/659
C08F 4/646
C08F 4/642

Abstract:

A mixed metallocene catalyst system can comprise at least one metallocene catalyst compound comprising a structure represented by formula (A) below and optionally at least one other metallocene catalyst compound having a structure represented by formula (B) below:A mixed metallocene catalyst system can additionally include a non-coordinating anion type activator comprising a supported alumoxane or aluminum alkyl, and optionally a scavenger. A process for making a polymeric product can comprise: contacting a C-Calpha-olefin feed with the catalyst system to obtain a polymerization reaction mixture; and obtaining a polymer product from the polymerization reaction mixture. A polymer product can be made by the process.

US Patent:

20210023540, Jan 28, 2021

Filed:

Oct 15, 2020

Appl. No.:

17/071696

Inventors:

- Baytown TX, US
Kevin A. Stevens - Houston TX, US
Laughlin G. McCullough - League City TX, US
David F. Sanders - Beaumont TX, US
Subramaniam Kuppuswamy - Mont Belvieu TX, US
Matthew S. Bedoya - Humble TX, US

International Classification:

B01J 31/22
B01J 31/18
C08L 23/08
C08F 210/14
B01J 31/16
B01J 31/14
C08F 4/653

Abstract:

A catalyst system including the product of the combination of an unbridged Group 4 metallocene compound and a 2,6-bis(imino)pyridyl iron complex is provided. A process for the polymerization of monomers (such as olefin monomers) and a polymer produced therefrom are also provided.

US Patent:

20200071349, Mar 5, 2020

Filed:

Aug 27, 2019

Appl. No.:

16/552352

Inventors:

- Baytown TX, US
Charles J. Harlan - Houston TX, US
Subramaniam Kuppuswamy - Mont Belvieu TX, US
Matthew S. Bedoya - Humble TX, US
Kevin A. Stevens - Houston TX, US

International Classification:

C07F 17/00
C08F 210/16

Abstract:

This invention relates to metallocene compounds represented by the formula:catalyst systems comprising said metallocene compound and an activator or a reaction product of the metallocene compound with the at least one activator, and polymerization processes using such metallocene compounds and activators, where Cpand Cpare optionally-substituted cyclopentadienyl rings; A is bridging group; q is zero or 1; Q is O, O(CRR), (CRR)O, or (CRR); m is 0 to 18; Z is (CRR); LA is a Lewis acid; M is a transition metal; Xand Xare independently Ror OR; Rand Rare independently selected from optionally-substituted hydrocarbyl groups; Rand Rare independently selected from the group consisting of H, halogen, and an optionally-substituted hydrocarbyl group; and Ris alkyl, aryl, perfluoroalkyl, or perfluoroaryl.

US Patent:

20200048382, Feb 13, 2020

Filed:

Oct 4, 2017

Appl. No.:

16/339935

Inventors:

- Baytown TX, US
Crisita Carmen H. Atienza - Houston TX, US
Charles J. Harlan - Houston TX, US
Xuan Ye - Houston TX, US
Matthew S. Bedoya - Humble TX, US
David F. Sanders - Beaumont TX, US
David A. Cano - Houston TX, US
Subramaniam Kuppuswamy - Mont Belvieu TX, US
Michelle E. Titone - Houston TX, US
Ching-Tai Lue - Sugarland TX, US
Laughlin G. McCullough - League City TX, US
Rohan A. Hule - Houston TX, US

International Classification:

C08F 210/16

Abstract:

Disclosed herein is a catalyst system including a first catalyst compound represented by Formula (I):and a second catalyst compound that is a bridged or unbridged metallocene. M is a group 4 metal. Xand Xare independently a univalent C1-C20 hydrocarbyl, C1-C20 substituted hydrocarbyl, a heteroatom or a heteroatom-containing group, or Xand Xjoin together to form a C4-C62 cyclic or polycyclic ring structure. R, R, R, R, R, R, R, R, R, and Ris independently hydrogen, C1-C40 hydrocarbyl, C1-C40 substituted hydrocarbyl, a heteroatom or a heteroatom-containing group, or two or more of R, R, R, R, R, R, R, R, R, or Rare joined together to form a C4-C62 cyclic or polycyclic ring structure, or a combination thereof. Q is a neutral donor group. Methods of polymerizing with the catalyst system to produce polyolefin polymers are also disclosed.

US Patent:

20190367649, Dec 5, 2019

Filed:

May 29, 2019

Appl. No.:

16/425159

Inventors:

- Baytown TX, US
Laughlin G. McCullough - League City TX, US
Kevin A. Stevens - Houston TX, US
Subramaniam Kuppuswamy - Mont Belvieu TX, US
Matthew S. Bedoya - Humble TX, US

International Classification:

C08F 210/16

Abstract:

The present disclosure relates to dual catalyst systems and processes for use thereof. The present disclosure further provides a catalyst system that is a combination of at least two hafnium metallocene catalyst compounds. The catalyst systems may be used for olefin polymerization processes. The present disclosure further provides for polymers, which can be formed by processes and catalyst systems of the present disclosure.