Patents by Inventor Zengrong Zhang

Zengrong Zhang 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: 20230348703
    Abstract: This disclosure relates to ethylene interpolymer products comprising a Melt Flow-Intrinsic Viscosity Index value, MFIVI, from ?0.05 to ?0.80; a first derivative of a melt flow distribution function, formula (I) at a loading of 4000 g, from >?1.51 to ??1.15; a sum of unsaturation, SUMU, from ?0.005 to <0.047 unsaturations per 100 carbon atoms; and a residual catalytic metal from ?0.03 to ?5 ppm of hafnium. Ethylene interpolymer products comprise at least two ethylene interpolymers. Ethylene interpolymer products are characterized by a melt index (I2) from 0.3 to 500 dg/minute, a density from 0.855 to 0.975 g/cc and from 0 to 25 mole percent of one or more a-olefins. Ethylene interpolymer products have polydispersity, Mw/Mn, from 1.7 to 25; and CDBI50 values from 1% to 98%. These ethylene interpolymer products have utility in flexible as well as rigid applications.
    Type: Application
    Filed: May 6, 2021
    Publication date: November 2, 2023
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Fazle Sibtain, Stephen Brown, Monika Kleczek
  • Publication number: 20230279166
    Abstract: This disclosure relates to ethylene interpolymer products comprising a Melt Flow-Intrinsic Viscosity Index value, MFIVI, of from ?0.05 to ?0.80; a first derivative of a melt flow distribution function, formula (I) of form ??1.85 to ??1.51; an unsaturation ratio, UR, of from >0.06 to ?0.60; and a residual catalytic metal of from ?0.03 to ?5 ppm of hafnium. Ethylene interpolymer products comprise at least two ethylene interpolymers. Ethylene interpolymer products are characterized by a melt index (I2) from 0.3 to 500 dg/minute, a density from 0.855 to 0.975 g/cc and from 0 to 25 mole percent of one or more a-olefins. Ethylene interpolymer products have polydispersity, Mw/Mn, from 1.7 to 25; and CDBI50 values from 1% to 98%. These ethylene interpolymer products have utility in flexible and rigid applications.
    Type: Application
    Filed: July 23, 2021
    Publication date: September 7, 2023
    Applicant: NOVA CHEMICALS (INTERNATIONAL) S.A.
    Inventors: Zengrong Zhang, Fazle Sibtain, Stephen Brown, Monika Kleczek
  • Publication number: 20230174756
    Abstract: This disclosure relates to ethylene interpolymer products comprising a Melt Flow-Intrinsic Viscosity Index value, MFIVI, of from ? 0.05 to ? 0.80; a first derivative of a melt flow distribution function, formula (I) at a loading of 4000 g, of from ? -1.85 to ?-1.51; a sum of unsaturation, SUMU, from ? 0.047 to ? 0.100 unsaturations per 100 carbon atoms; and a residual catalytic metal of from ? 0.03 to ? 5 ppm of hafnium. Ethylene interpolymer products comprise at least two ethylene interpolymers. Ethylene interpolymer products are characterized by a melt index (I2) from 0.3 to 500 dg/minute, a density from 0.855 to 0.975 g/cc and from 0 to 25 mole percent of one or more a-olefins. Ethylene interpolymer products have polydispersity, Mw/Mn, from 1.7 to 25; and CDBI50 values from 1% to 98%. These ethylene interpolymer products have utility in flexible as well as rigid applications.
    Type: Application
    Filed: May 6, 2021
    Publication date: June 8, 2023
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Fazle Sibtain, Stephen Brown, Monika Kleczek
  • Patent number: 11584845
    Abstract: This disclosure relates to ethylene interpolymer compositions and films prepared therefrom. Specifically: ethylene interpolymer products having: a dimensionless nonlinear rheology network parameter, ?int., greater than or equal to 0.01, satisfying 0.01×(Z?50)0.78??int.?0.01×(Z?60)0.78 inequality wherein Z is a normalized molecular weight defined by Z = M w M e where Mw and Me are the weight average and entanglement molecular weights, and; a residual catalytic metal of from ?0.03 to ?5 ppm of hafnium. The disclosed ethylene interpolymer products have a melt index from about 0.3 to about 500 dg/minute, a density from about 0.855 to about 0.975 g/cc, a polydispersity, M w M n , from about 1.7 to about 25 and a Composition Distribution Breadth Index (CDBI50) from about 1% to about 98%.
    Type: Grant
    Filed: March 22, 2022
    Date of Patent: February 21, 2023
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Soheil Sadeghi, Fazle Sibtain, Zengrong Zhang, Niousha Kazemi, Monika Kleczek, Vinod Konaganti, Bronwyn Gillon, Shivendra Goyal, Sepideh Kasiri, Stephen Salomons, Kenneth Taylor, Mehdi Keshtkar
  • Publication number: 20230002596
    Abstract: This disclosure relates to ethylene interpolymer product having intermediate branching. Intermediate branching was defined as branching that was longer than the branch length due to comonomer and shorter than the entanglement molecular weight (Me). Intermediately branched ethylene interpolymer products were produced in a continuous solution polymerization process employing an intermediate branching catalyst formulation. Intermediately branched ethylene interpolymer products were characterized by a Non-Comonomer Index Distribution (NCIDi), a melt index from 0.3 to 500 dg/minute, a density from 0.858 to 0.965 g/cm3, a polydispersity (Mw/Mn) from about 2 to about 25 and a CDBI50 from about 10% to about 98%. A method based on triple detection cross fractionation chromatography (3D-CFC) was disclosed to measure NCIDi.
    Type: Application
    Filed: August 25, 2022
    Publication date: January 5, 2023
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Fazle Sibtain, Niousha Kazemi, Kenneth Taylor, Shivendra Goyal
  • Patent number: 11490602
    Abstract: A breeding method for improving reproductive performance of a chicken specialized dam line includes the steps of forming an F1 generation group, forming a breeding group, screening a breeding group, forming an F2 generation group, and continuously breeding to an Fn generation group. The method includes raising in small-scale groups and natural mating for systematic selection and breeding, which effectively reduces the generation interval and has the features of easy operation and fast genetic progress, not only ensuring animal welfare, but also effectively improving production performance.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: November 8, 2022
    Assignee: Sichuan Animal Science Academy
    Inventors: Xiaosong Jiang, Chaowu Yang, Mohan Qiu, Zengrong Zhang, Chunlin Yu, Huarui Du, Qingyun Li, Bo Xia, Xiaoyan Song, Chenming Hu, Xia Xiong, Li Yang, Han Peng, Jialei Chen
  • Publication number: 20220227978
    Abstract: This disclosure relates to ethylene interpolymer compositions and films prepared therefrom. Specifically: ethylene interpolymer products having: a dimensionless nonlinear rheology network parameter, ?int., greater than or equal to 0.01, satisfying 0.01×(Z?50)0.78??int.?0.01×(Z?60)0.78 inequality wherein Z is a normalized molecular weight defined by Z = M w M e where Mw and Me are the weight average and entanglement molecular weights, and; a residual catalytic metal of from ?0.03 to ?5 ppm of hafnium. The disclosed ethylene interpolymer products have a melt index from about 0.3 to about 500 dg/minute, a density from about 0.855 to about 0.975 g/cc, a polydispersity, M w M n , from about 1.7 to about 25 and a Composition Distribution Breadth Index (CDBI50) from about 1% to about 98%.
    Type: Application
    Filed: March 22, 2022
    Publication date: July 21, 2022
    Applicant: NOVA CHEMICALS (INTERNATIONAL) S.A.
    Inventors: Soheil Sadeghi, Fazle Sibtain, Zengrong Zhang, Niousha Kazemi, Monika Kleczek, Vinod Konaganti, Bronwyn Gillon, Shivendra Goyal, Sepideh Kasiri, Stephen Salomons, Kenneth Taylor, Mehdi Keshtkar
  • Patent number: 11312845
    Abstract: This disclosure relates to ethylene interpolymer compositions and films prepared therefrom. Specifically: ethylene interpolymer products having: a dimensionless nonlinear rheology network parameter, ?int., greater than or equal to 0.01, satisfying 0.01×(Z?50)0.78??int.?0.01×(Z?60)0.78 inequality wherein Z is a normalized molecular weight defined by Z = M w M e where Mw and Me are the weight average and entanglement molecular weights, and; a residual catalytic metal of from ?0.03 to ?5 ppm of hafnium. The disclosed ethylene interpolymer products have a melt index from about 0.3 to about 500 dg/minute, a density from about 0.855 to about 0.975 g/cc, a polydispersity, M w M n , from about 1.7 to about 25 and a Composition Distribution Breadth Index (CDBI50) from about 1% to about 98%.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: April 26, 2022
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Soheil Sadeghi, Fazle Sibtain, Zengrong Zhang, Niousha Kazemi, Monika Kleczek, Vinod Konaganti, Bronwyn Gillon, Shivendra Goyal, Sepideh Kasiri, Stephen Salomons, Kenneth Taylor, Mehdi Keshtkar
  • Patent number: 11111368
    Abstract: A continuous solution polymerization process is disclosed wherein at least two catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a first heterogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to a third homogeneous catalyst formulation. A means for reducing the (?-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to a third homogeneous catalyst formulation.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: September 7, 2021
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Niousha Kazemi, Stephen Salomons, Monika Kleczek, Mehdi Keshtkar, Brian Molloy, Qinyan Wang, Peter Zoricak, Charles Carter, XiaoChuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor, Lawrence VanAsseldonk, Hamidreza Khakdaman
  • Patent number: 11015044
    Abstract: A continuous solution polymerization process is disclosed wherein at least two homogeneous catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a second homogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to the third homogeneous catalyst formulation. A means for reducing the (?-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to the third homogeneous catalyst formulation.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: May 25, 2021
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Niousha Kazemi, Stephen Salomons, Monika Kleczek, Mehdi Keshtkar, Brian Molloy, Qinyan Wang, Peter Zoricak, Charles Carter, XiaoChuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor, Lawrence VanAsseldonk, Hamidreza Khakdaman
  • Publication number: 20210024726
    Abstract: This disclosure relates to ethylene interpolymer product having intermediate branching. Intermediate branching was defined as branching that was longer than the branch length due to comonomer and shorter than the entanglement molecular weight (Me). Intermediately branched ethylene interpolymer products were produced in a continuous solution polymerization process employing an intermediate branching catalyst formulation. Intermediately branched ethylene interpolymer products were characterized by a Non-Comonomer Index Distribution (NCIDi), a melt index from 0.3 to 500 dg/minute, a density from 0.858 to 0.965 g/cm3, a polydispersity (Mw/Mn) from about 2 to about 25 and a CDBI50 from about 10% to about 98%. A method based on triple detection cross fractionation chromatography (3D-CFC) was disclosed to measure NCIDi.
    Type: Application
    Filed: October 13, 2020
    Publication date: January 28, 2021
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Fazle Sibtain, Niousha Kazemi, Kenneth Taylor, Shivendra Goyal
  • Patent number: 10882987
    Abstract: This disclosure relates to ethylene interpolymer product having intermediate branching. Intermediate branching was defined as branching that was longer than the branch length due to comonomer and shorter than the entanglement molecular weight (Me). Intermediately branched ethylene interpolymer products were produced in a continuous solution polymerization process employing an intermediate branching catalyst formulation. Intermediately branched ethylene interpolymer products were characterized by a Non-Comonomer Index Distribution (NCIDi), a melt index from 0.3 to 500 dg/minute, a density from 0.858 to 0.965 g/cm3, a polydispersity (Mw/Mn) from about 2 to about 25 and a CDBI50 from about 10% to about 98%. A method based on triple detection cross fractionation chromatography (3D-CFC) was disclosed to measure NCIDi.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: January 5, 2021
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Fazle Sibtain, Niousha Kazemi, Kenneth Taylor, Shivendra Goyal
  • Publication number: 20200396971
    Abstract: A breeding method for improving reproductive performance of a chicken specialized dam line includes the steps of forming an F1 generation group, forming a breeding group, screening a breeding group, forming an F2 generation group, and continuously breeding to an Fn generation group. The method includes raising in small-scale groups and natural mating for systematic selection and breeding, which effectively reduces the generation interval and has the features of easy operation and fast genetic progress, not only ensuring animal welfare, but also effectively improving production performance.
    Type: Application
    Filed: February 26, 2020
    Publication date: December 24, 2020
    Applicant: Sichuan Animal Science Academy
    Inventors: XIAOSONG JIANG, CHAOWU YANG, MOHAN QIU, ZENGRONG ZHANG, CHUNLIN YU, HUARUI DU, QINGYUN LI, BO XIA, XIAOYAN SONG, CHENMING HU, XIA XIONG, LI YANG, HAN PENG, JIALEI CHEN
  • Publication number: 20200325317
    Abstract: A continuous solution polymerization process is disclosed wherein at least two catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a first heterogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to a third homogeneous catalyst formulation. A means for reducing the (?-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to a third homogeneous catalyst formulation.
    Type: Application
    Filed: June 24, 2020
    Publication date: October 15, 2020
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Niousha Kazemi, Stephen Salomons, Monika Kleczek, Mehdi Keshtkar, Brian Molloy, Qinyan Wang, Peter Zoricak, Charles Carter, XiaoChuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor, Lawrence VanAsseldonk, Hamidreza Khakdaman
  • Patent number: 10738183
    Abstract: A continuous solution polymerization process is disclosed wherein at least two catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a first heterogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to a third homogeneous catalyst formulation. A means for reducing the (?-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to a third homogeneous catalyst formulation.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: August 11, 2020
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Niousha Kazemi, Stephen Salomons, Monika Kleczek, Mehdi Keshtkar, Brian Molloy, Qinyan Wang, Peter Zoricak, Charles Carter, XiaoChuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor, Lawrence VanAsseldonk, Hamidreza Khakdaman
  • Publication number: 20200224013
    Abstract: This disclosure relates to ethylene interpolymer compositions and films prepared therefrom. Specifically: ethylene interpolymer products having: a dimensionless nonlinear rheology network parameter, ?int., greater than or equal to 0.01, satisfying 0.01×(Z?50)0.78??int.?0.01×(Z?60)0.78 inequality wherein Z is a normalized molecular weight defined by Z = M w M e where Mw and Me are the weight average and entanglement molecular weights, and; a residual catalytic metal of from ?0.03 to ?5 ppm of hafnium. The disclosed ethylene interpolymer products have a melt index from about 0.3 to about 500 dg/minute, a density from about 0.855 to about 0.975 g/cc, a polydispersity, M w M n , from about 1.7 to about 25 and a Composition Distribution Breadth Index (CDBI50) from about 1% to about 98%.
    Type: Application
    Filed: March 23, 2020
    Publication date: July 16, 2020
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Soheil Sadeghi, Fazle Sibtain, Zengrong Zhang, Niousha Kazemi, Monika Kleczek, Vinod Konaganti, Bronwyn Gillon, Shivendra Goyal, Sepideh Kasiri, Stephen Salomons, Kenneth Taylor, Mehdi Keshtkar
  • Publication number: 20200216645
    Abstract: This disclosure relates to ethylene interpolymer product having intermediate branching. Intermediate branching was defined as branching that was longer than the branch length due to comonomer and shorter than the entanglement molecular weight (Me). Intermediately branched ethylene interpolymer products were produced in a continuous solution polymerization process employing an intermediate branching catalyst formulation. Intermediately branched ethylene interpolymer products were characterized by a Non-Comonomer Index Distribution (NCIDi), a melt index from 0.3 to 500 dg/minute, a density from 0.858 to 0.965 g/cm3, a polydispersity (Mw/Mn) from about 2 to about 25 and a CDBI50 from about 10% to about 98%. A method based on triple detection cross fractionation chromatography (3D-CFC) was disclosed to measure NCIDi.
    Type: Application
    Filed: January 9, 2019
    Publication date: July 9, 2020
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Fazle Sibtain, Niousha Kazemi, Kenneth Taylor, Shivendra Goyal
  • Publication number: 20200056024
    Abstract: A continuous solution polymerization process is disclosed wherein at least two homogeneous catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a second homogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to the third homogeneous catalyst formulation. A means for reducing the (?-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to the third homogeneous catalyst formulation.
    Type: Application
    Filed: August 30, 2019
    Publication date: February 20, 2020
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Niousha Kazemi, Stephen Salomons, Monika Kleczek, Mehdi Keshtkar, Brian Molloy, Qinyan Wang, Peter Zoricak, Charles Carter, XiaoChuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor, Lawrence VanAsseldonk, Hamidreza Khakdaman
  • Publication number: 20200056025
    Abstract: A continuous solution polymerization process is disclosed wherein at least two catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a first heterogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to a third homogeneous catalyst formulation. A means for reducing the (?-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to a third homogeneous catalyst formulation.
    Type: Application
    Filed: August 30, 2019
    Publication date: February 20, 2020
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Niousha Kazemi, Stephen Salomons, Monika Kleczek, Mehdi Keshtkar, Brian Molloy, Qinyan Wang, Peter Zoricak, Charles Carter, XiaoChuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor, Lawrence VanAsseldonk, Hamidreza Khakdaman
  • Patent number: 10442921
    Abstract: A continuous solution polymerization process is disclosed wherein at least two homogeneous catalyst formulations are employed. A first homogeneous catalyst formulation is employed in a first reactor to produce a first ethylene interpolymer and a second homogeneous catalyst formulation is employed in a second reactor to produce a second ethylene interpolymer. Optionally a third ethylene interpolymer is formed in a third reactor. The resulting ethylene interpolymer products possess desirable properties in a variety of end use applications, for example in film applications. A means for increasing the molecular weight of the first ethylene interpolymer is disclosed and/or a means for increasing the temperature of the first reactor, relative to the third homogeneous catalyst formulation. A means for reducing the (?-olefin/ethylene) weight ratio in the first reactor is disclosed and/or reducing the density of the first ethylene interpolymer, relative to the third homogeneous catalyst formulation.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: October 15, 2019
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Zengrong Zhang, Niousha Kazemi, Stephen Salomons, Monika Kleczek, Mehdi Keshtkar, Brian Molloy, Qinyan Wang, Peter Zoricak, Charles Carter, XiaoChuan Wang, Christopher Dobbin, Fazle Sibtain, Kenneth Taylor, Lawrence VanAsseldonk, Hamidreza Khakdaman