Patents by Inventor Irene C. Cai

Irene C. Cai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220289879
    Abstract: This invention relates to polymers comprising: one or more that include 1) at least 11 wt % 4 substituted 1,4 hexadiene and less than 20 wt % 5-methyl-1,4-hexadiene, based upon the weight of the polymer, and 2) optionally, one or more olefins; and processes to produces such polymers using metallocene or post-metallocene catalyst compounds.
    Type: Application
    Filed: February 23, 2022
    Publication date: September 15, 2022
    Inventors: Alex E. Carpenter, Tzu-Pin Lin, Brian J. Rohde, Sarah J. Mattler, Nikola S. Lambic, Hsu Chiang, Peijun Jiang, Irene C. Cai, Gursu Culcu, Jarod M. Younker
  • Publication number: 20220274098
    Abstract: Methods for the hydroalkenylation of conjugated, 1,3-dienes using a diimine catalyst. The method comprises mixing a diene having at least five carbon atoms and an iron diimine complex at a temperature of about ?60° C. to about 23° C. to provide a catalyst solution; and introducing one or more alpha olefins at a pressure of at least 300 psig to obtain a product comprising the substituted diene monomer.
    Type: Application
    Filed: February 25, 2022
    Publication date: September 1, 2022
    Applicants: EXXONMOBIL CHEMICAL PATENTS INC., THE TRUSTEES OF PRINCETON UNIVERSITY
    Inventors: ALEX E. CARPENTER, TZU-PIN LIN, IRENE C. CAI, GURSU CULCU, DANIELLE SINGLETON, PAUL J. CHIRIK, C. ROSE KENNEDY, MEGAN MOHADJER BEROMI
  • Patent number: 11248070
    Abstract: The present disclosure relates to Lewis base catalysts. Catalysts, catalyst systems, and processes of the present disclosure can provide high temperature ethylene polymerization, propylene polymerization, or copolymerization as the Lewis base catalysts (e.g., bis(aryl phenolate) five-membered ring catalysts), can be stable at high polymerization temperatures and have good activity at the high polymerization temperatures. The stable catalysts with good activity can provide formation of polymers having high molecular weights or polymers having low to very molecular weights, and the ability to make an increased amount of polymer in a given reactor, as compared to conventional catalysts. Hence, the present disclosure demonstrates highly active catalysts capable of operating at high reactor temperatures while producing polymers with controlled molecular weights and or robust isotacticity.
    Type: Grant
    Filed: February 11, 2020
    Date of Patent: February 15, 2022
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Georgy P. Goryunov, Vladislav A. Popov, Dmitry V. Uborsky, Alexander Z. Voskoboynikov, John R. Hagadorn, Irene C. Cai, Jo Ann M. Canich
  • Patent number: 11203654
    Abstract: The present disclosure relates to bis(aryl phenolate) Lewis base catalysts. Catalysts, catalyst systems, and processes of the present disclosure can provide high temperature ethylene polymerization, propylene polymerization, or copolymerization as the bis(aryl phenolate) Lewis base catalysts are stable at high polymerization temperatures and have good activity at the high polymerization temperatures. The stable catalysts with good activity can provide formation of polymers having high molecular weights and the ability to make an increased amount of polymer in a given reactor, as compared to conventional catalysts. Hence, the present disclosure demonstrates highly active catalysts capable of operating at high reactor temperatures while producing polymers with controlled molecular weights and or robust isotacticity.
    Type: Grant
    Filed: February 11, 2020
    Date of Patent: December 21, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Georgy P. Goryunov, Vladislav A. Popov, Dmitry V. Uborsky, Alexander Z. Voskoboynikov, John R. Hagadorn, Irene C. Cai, Hua Zhou, Jo Ann M. Canich
  • Patent number: 11091567
    Abstract: The present disclosure relates to amido-benzoquinone transition metal complexes, catalyst systems including amido-benzoquinone transition metal complexes, and polymerization processes to produce polyolefin polymers such as polyethylene-based polymers and polypropylene-based polymers.
    Type: Grant
    Filed: March 12, 2020
    Date of Patent: August 17, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Tzu-Pin Lin, Lubin Luo, Alex E. Carpenter, Gursu Culcu, Catherine A. Faler, Irene C. Cai, John R. Hagadorn, Jo Ann M. Canich
  • Publication number: 20200325254
    Abstract: The present disclosure relates to amido-benzoquinone transition metal complexes, catalyst systems including amido-benzoquinone transition metal complexes, and polymerization processes to produce polyolefin polymers such as polyethylene-based polymers and polypropylene-based polymers.
    Type: Application
    Filed: March 12, 2020
    Publication date: October 15, 2020
    Inventors: Tzu-Pin Lin, Lubin Luo, Alex E. Carpenter, Gursu Culcu, Catherine A. Faler, Irene C. Cai, John R. Hagadorn, Jo Ann M. Canich
  • Publication number: 20200255556
    Abstract: The present disclosure relates to Lewis base catalysts. Catalysts, catalyst systems, and processes of the present disclosure can provide high temperature ethylene polymerization, propylene polymerization, or copolymerization as the Lewis base catalysts (e.g., bis(aryl phenolate) five-membered ring catalysts), can be stable at high polymerization temperatures and have good activity at the high polymerization temperatures. The stable catalysts with good activity can provide formation of polymers having high molecular weights or polymers having low to very molecular weights, and the ability to make an increased amount of polymer in a given reactor, as compared to conventional catalysts. Hence, the present disclosure demonstrates highly active catalysts capable of operating at high reactor temperatures while producing polymers with controlled molecular weights and or robust isotacticity.
    Type: Application
    Filed: February 11, 2020
    Publication date: August 13, 2020
    Inventors: Georgy P. Goryunov, Vladislav A. Popov, Dmitry V. Uborsky, Alexander Z. Voskoboynikov, John R. Hagadorn, Irene C. Cai, Jo Ann M. Canich
  • Publication number: 20200254431
    Abstract: The present disclosure relates to bis(aryl phenolate) Lewis base catalysts. Catalysts, catalyst systems, and processes of the present disclosure can provide high temperature ethylene polymerization, propylene polymerization, or copolymerization as the bis(aryl phenolate) Lewis base catalysts are stable at high polymerization temperatures and have good activity at the high polymerization temperatures. The stable catalysts with good activity can provide formation of polymers having high molecular weights and the ability to make an increased amount of polymer in a given reactor, as compared to conventional catalysts. Hence, the present disclosure demonstrates highly active catalysts capable of operating at high reactor temperatures while producing polymers with controlled molecular weights and or robust isotacticity.
    Type: Application
    Filed: February 11, 2020
    Publication date: August 13, 2020
    Inventors: Georgy P. Goryunov, Vladislav A. Popov, Dmitry V. Uborsky, Alexander Z. Voskoboynikov, John R. Hagadorn, Irene C. Cai, Hua Zhou, Jo Ann M. Canich