Patents by Inventor Rongjuan Cong

Rongjuan Cong 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).

  • Patent number: 11988650
    Abstract: A method to determine the weight percent of an “amorphous” fraction in an olefin-based polymer composition, comprising one or more olefin-based polymers; said method comprising the following steps: a) dissolving the olefin-based polymer composition in an organic solvent to form a polymer solution; b) injecting at least a portion of the polymer solution onto a support material, and wherein the support material has a Co-crystallization Index (CI) value from 0.70 to 1.20; c) cooling the support material at a rate greater than, or equal to, 0.2 C/min; d) increasing the temperature of the support material to elute the polymers of the olefin-based polymer composition; e) generating a chromatogram; f) determining the peak area of the first elution from its lower integration limit to its upper integration limit; g) calculating the “amorphous” fraction” based on the following Equation A below: wt % “amorphous” fraction=PAamorphous/PAtotal×100 (Eqn.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: May 21, 2024
    Assignee: Dow Global Technologies LLC
    Inventors: Rongjuan Cong, Kimberly L. Bailey, Vickie Ricca
  • Publication number: 20240010771
    Abstract: Processes of polymerizing olefin monomers. The process includes reacting ethylene and optionally one or more olefin monomers in the presence of a catalyst system, wherein the catalyst system comprises: modified-hydrocarbyl methylaluminoxane having less than 50 mole percent AlRA1RB1RC1 based on the total moles of aluminum, where RA1, RB1, and RC1 are independently is linear (C1-C40)alkyl, branched (C1-C40)alkyl, or (C6-C40)aryl; and one or more metal-ligand complexes according to formula (I).
    Type: Application
    Filed: February 5, 2021
    Publication date: January 11, 2024
    Applicant: Dow Global Technologies LLC
    Inventors: Philip P. Fontaine, David M. Pearson, Hien Q. Do, Johnathan E. Delorbe, Rafael Huacuja, Rhett A. Baillie, Rongjuan Cong
  • Patent number: 11857948
    Abstract: A packing material for chromatography, the packing material comprising coated particles, wherein the coated particles comprise non-porous particles and a portion of the surface area of the non-porous particles is coated with a coating composition comprising graphene and/or graphene oxide.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: January 2, 2024
    Assignee: Dow Global Technologies LLC
    Inventors: Rongjuan Cong, Albert Parrott, Charles Michael Cheatham, Janet Goss
  • Publication number: 20220389139
    Abstract: A composition comprising an ethylene/alpha-olefin interpolymer that comprises the following properties: a) a total unsaturation/1000C?0.30; b) a molecular weight distribution (MWD)?3.0; c) a TGIC broadness parameter B1/4?8.0. A solution N polymerization process to prepare an ethylene/alpha-olefin/interpolymer, said process comprising polymerizing, in one reactor, at a reactor temperature ?150° C., a reaction mixture comprising ethylene, an alpha-olefin, a solvent, and a metal complex as described herein. A method to determine the TGIC broadness parameter B1/x of a polymer composition comprising one or more olefin-based polymers.
    Type: Application
    Filed: December 17, 2020
    Publication date: December 8, 2022
    Inventors: Gaoxiang Wu, Brian M. Habersberger, Johnathan E. DeLorbe, Thomas Wesley Karjala, Jr., Yabin Sun, Rongjuan Cong
  • Patent number: 11273592
    Abstract: The present invention discloses a process for forming a biaxially oriented film. The process includes first selecting a polyolefin resin wherein said polyolefin resin comprises a linear low density polyethylene resin characterized by having from 9 to 35 weight percent of the total weight of linear low density polyethylene resin eluting from a CEF at a temperature greater than 97.0° C.; and further characterized by having a CDR of from 33 to 80 and a Mw Ratio of from 0.15 to 0.45. Next a film is formed from the polyolefin resin selected in the first step. Finally the film formed in the second step is oriented in a sequential manner. The films produced by this process are characterized by having an ultimate elongation at least 1.5 times greater in the MD as compared to the CD and the 2% secant modulus is a least 1.25 times greater in the CD as compared to the MD.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: March 15, 2022
    Assignee: Dow Global Technologies LLC
    Inventors: Xiao Bing Yun, Rongjuan Cong, Jianping Pan, Teresa P. Karjala
  • Patent number: 11261544
    Abstract: An ethylene/alpha-olefin interpolymer suitable for use in fibers and nonwovens having a density of from 0.911 to 0.939 g/cc, a Brookfield viscosity of less than or equal to 50,000 cP, and a molecular weight distribution (Mw,cc/Mn,cc) of 1.8 to 3.5, and articles thereof.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: March 1, 2022
    Assignee: Dow Global Technologies LLC
    Inventors: Viraj Shah, Yijian Lin, Ronald Wevers, Rongjuan Cong, Mehmet Demirors
  • Patent number: 11248075
    Abstract: The invention provides compositions, each comprising an ethylene/alpha-olefin interpolymer, which has a reduced level of a low density, low molecular weight oligomeric fraction, as indicated by an HCC value, as described herein, and reduced levels of inorganic content or lower Tm. The invention also provides processes for forming such interpolymers.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: February 15, 2022
    Assignee: Dow Global Technologies LLC
    Inventors: Frank J. Cerk, Rongjuan Cong, Shrikant Dhodapkar, Selim Yalvac, Morgan M. Hughes, Timothy W. Gambrel, Yi Jin
  • Patent number: 11161969
    Abstract: Embodiments of the present disclosure are directed ethylene/alpha-olefin interpolymer compositions including a polyethylene and an alpha-olefin comonomer, where the polyethylene is from 70 wt % to 100 wt % of the interpolymer composition based on a total weight of the interpolymer composition and the interpolymer composition is characterized by a Comonomer Distribution Constant (CDC) in a range of from 100 to 500, a vinyl unsaturation of less than 0.15 vinyls per one thousand total carbon atoms present in the interpolymer composition, a zero shear viscosity ratio (ZSVR) in a range from 1.5 to 5, a density in a range of from 0.903 to 0.950 g/cm3, a melt index (I2) in a range of from 0.1 to 15 g/10 minutes, a molecular weight distribution (Mw/Mn) in a range of from 1.8 to 4.5, and a separation index of from 0.50 to 1.10.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: November 2, 2021
    Assignee: Dow Global Technologies LLC
    Inventors: Mehmet Demirors, Brayden E. Glad, Rongjuan Cong
  • Publication number: 20210246291
    Abstract: The present application relates to a composition comprising the following components: A) at least one ethylene/alpha-olefin interpolymer; B) a peroxide; C) at least one filler selected from one or more carbon black samples, MgO, or a combination thereof; and optionally, at least one filler selected from silica, ZnO, CaCO3, A1 (OH)3, Mg (OH)2, or a combination thereof; D) a calculated P content from 0.010 wt % to 0.300 wt %, based on the weight of the composition, and wherein the calculated P content is the calculated content the phosphorus element present in one or more phosphate compounds selected from Structure 1 below: O?P (OR1) (OR2) (OR3) (Structure 1), wherein R1, R2 and R3 are each, independently, selected from i) a non-aromatic hydrocarbon or ii) a non-aromatic hydrocarbon comprising at least one heteroatom, excluding P.
    Type: Application
    Filed: April 27, 2018
    Publication date: August 12, 2021
    Inventors: Bo Lyu, Yong Chen, Rongjuan Cong, Yabin Sun, Tao Han, Bharat I. Chaudhary
  • Publication number: 20210132011
    Abstract: A method to determine the weight percent of an “amorphous” fraction in an olefin-based polymer composition, comprising one or more olefin-based polymers; said method comprising the following steps: a) dissolving the olefin-based polymer composition in an organic solvent to form a polymer solution; b) injecting at least a portion of the polymer solution onto a support material, and wherein the support material has a Co-crystallization Index (CI) value from 0.70 to 1.20; c) cooling the support material at a rate greater than, or equal to, 0.2C/min; d) increasing the temperature of the support material to elute the polymers of the olefin-based polymer composition; e) generating a chromatogram; f) determining the peak area of the first elution from its lower integration limit to its upper integration limit; g) calculating the “amorphous” fraction” based on the following Equation A below: wt % “amorphous” fraction=PAamorphous/PAtotal×100 (Eqn.
    Type: Application
    Filed: June 25, 2019
    Publication date: May 6, 2021
    Inventors: Rongjuan Cong, Kimberly L. Bailey, Vickie Ricca
  • Patent number: 10792899
    Abstract: Embodiments of the present invention relate to biaxially oriented, multilayer polyethylene films and to laminates and articles formed therefrom. In one aspect, a biaxially oriented, multilayer polyethylene film comprises Layer A which is a sealant layer p having a top facial surface and a bottom facial surface and comprising a first polyethylene, wherein the first polyethylene has a density of at least 0.900 g/cm3, an IHDF>95 of 20-60 kg/mol, and a MWHDF>95 of greater than 130 kg/mol, wherein Layer A comprises at least 50 weight percent of the first polyethylene based on the weight of Layer A, and Layer B having a top facial surface and a bottom facial surface, wherein Layer B comprises one or more additional polyethylenes, and wherein the top facial surface of Layer B is in adhering contact with a bottom facial surface of Layer A, wherein the density of the first polyethylene is at least 0.002 g/cm3 less than the density of Layer B.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: October 6, 2020
    Assignee: Dow Global Technologies LLC
    Inventors: Jianping Pan, Xiao Bing Yun, Yijian Lin, Rongjuan Cong
  • Publication number: 20200282378
    Abstract: A packing material for chromatography, the packing material comprising coated particles, wherein the coated particles comprise non-porous particles and a portion of the surface area of the non-porous particles is coated with a coating composition comprising graphene and/or graphene oxide.
    Type: Application
    Filed: November 2, 2018
    Publication date: September 10, 2020
    Applicant: Dow Global Technologies LLC
    Inventors: Rongjuan Cong, Albert Parrott, Charles Michael Cheatham, Janet Goss
  • Patent number: 10761072
    Abstract: A temperature gradient chromatography, and apparatus for the same, said method comprising the following: a) dissolving a composition comprising at least one polymer in at least one solvent, to form a polymer solution; b) injecting at least a portion of the polymer solution onto a support material and wherein the support material has a CI from 0.70 to 1.50; c) cooling the support material at a rate greater than, or equal to, 0.2° C./min; d) increasing the temperature of the support material to elute at least some of the polymer; e) generating the chromatogram.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: September 1, 2020
    Assignee: DOW Global Technologies LLC
    Inventors: Rongjuan Cong, Albert Parrott, Cherry Hollis, Charles Michael Cheatham
  • Publication number: 20200048385
    Abstract: The invention provides compositions, each comprising an ethylene/alpha-olefin interpolymer, which has a reduced level of a low density, low molecular weight oligomeric fraction, as indicated by an HCC value, as described herein, and reduced levels of inorganic content or lower Tm. The invention also provides processes for forming such interpolymers.
    Type: Application
    Filed: October 16, 2019
    Publication date: February 13, 2020
    Inventors: Frank J. Cerk, Rongjuan Cong, Shrikant Dhodapkar, Selim Yalvac, Morgan M. Hughes, Timothy W. Gambrel, Yi Jin
  • Publication number: 20200002849
    Abstract: An ethylene/alpha-olefin interpolymer suitable for use in fibers and nonwovens having a density of from 0.911 to 0.939 g/cc, a Brookfield viscosity of less than or equal to 50,000 cP, and a molecular weight distribution (Mw,cc/Mn,cc) of 1.8 to 3.5, and articles thereof.
    Type: Application
    Filed: March 7, 2018
    Publication date: January 2, 2020
    Inventors: Viraj Shah, Yijian Lin, Ronald Wevers, Rongjuan Cong, Mehmet Demirors
  • Patent number: 10495616
    Abstract: A method increase of the Resolution Index (RI) of a chromatogram generated from a polymer sample comprising at least two olefin-based polymers of different microstructures and/or at least two olefin-based polymer fractions of different microstructures. The method comprises separating the mixture on a low-porosity stationary phase and repeatedly cycling the sample-stationary phase through a series of cooling and heating stages with active eluent flow only during the cooling stages and during the last heating stage to elute the separated analytes off the column.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: December 3, 2019
    Assignee: Dow Global Technologies LLC
    Inventors: Rongjuan Cong, Albert Parrott, Cherry Hollis
  • Publication number: 20190359807
    Abstract: Embodiments of the present disclosure are directed ethylene/alpha-olefin interpolymer compositions including a polyethylene and an alpha-olefin comonomer, where the polyethylene is from 70 wt % to 100 wt % of the interpolymer composition based on a total weight of the interpolymer composition and the interpolymer composition is characterized by a Comonomer Distribution Constant (CDC) in a range of from 100 to 500, a vinyl unsaturation of less than 0.15 vinyls per one thousand total carbon atoms present in the interpolymer composition, a zero shear viscosity ratio (ZSVR) in a range from 1.5 to 5, a density in a range of from 0.903 to 0.950 g/cm3, a melt index (I2) in a range of from 0.1 to 15 g/10 minutes, a molecular weight distribution (Mw/Mn) in a range of from 1.8 to 4.5, and a separation index of from 0.50 to 1.10.
    Type: Application
    Filed: December 6, 2017
    Publication date: November 28, 2019
    Applicant: Dow Global Technologies LLC
    Inventors: Mehmet Demirors, Brayden E. Glad, Rongjuan Cong
  • Patent number: 10450393
    Abstract: The invention provides compositions, each comprising an ethylene/alpha-olefin interpolymer, which has a reduced level of a low density, low molecular weight oligomeric fraction, as indicated by an HCC value, as described herein, and reduced levels of inorganic content or lower Tm. The invention also provides processes for forming such interpolymers.
    Type: Grant
    Filed: May 7, 2019
    Date of Patent: October 22, 2019
    Assignee: Dow Global Technologies LLC
    Inventors: Frank J. Cerk, Rongjuan Cong, Shrikant Dhodapkar, Selim Yalvac, Morgan M. Hughes, Timothy W. Gambrel, Yi Jin
  • Publication number: 20190299517
    Abstract: The present invention discloses a process for forming a biaxially oriented film. The process includes first selecting a polyolefin resin wherein said polyolefin resin comprises a linear low density polyethylene resin characterized by having from 9 to 35 weight percent of the total weight of linear low density polyethylene resin eluting from a CEF at a temperature greater than 97.0° C.; and further characterized by having a CDR of from 33 to 80 and a Mw Ratio of from 0.15 to 0.45. Next a film is formed from the polyolefin resin selected in the first step. Finally the film formed in the second step is oriented in a sequential manner. The films produced by this process are characterized by having an ultimate elongation at least 1.5 times greater in the MD as compared to the CD and the 2% secant modulus is a least 1.25 times greater in the CD as compared to the MD.
    Type: Application
    Filed: June 10, 2019
    Publication date: October 3, 2019
    Inventors: Xiao Bing Yun, Rongjuan Cong, Jianping Pan, Teresa P. Karjala
  • Publication number: 20190263950
    Abstract: The invention provides compositions, each comprising an ethylene/alpha-olefin interpolymer, which has a reduced level of a low density, low molecular weight oligomeric fraction, as indicated by an HCC value, as described herein, and reduced levels of inorganic content or lower Tm. The invention also provides processes for forming such interpolymers.
    Type: Application
    Filed: May 7, 2019
    Publication date: August 29, 2019
    Inventors: Frank J. Cerk, Rongjuan Cong, Shrikant Dhodapkar, Selim Yalvac, Morgan M. Hughes, Timothy W. Gambrel, Yi Jin