Patents by Inventor Keran Lu

Keran Lu 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: 20240117165
    Abstract: Bimodal high density polyethylene compositions can achieve an improved balance of stress crack resistance and processibility by selecting the higher molecular weight and lower molecular weight components such that (1) the higher molecular weight component has a molecular weight distribution below 4, (2) the lower molecular weight component has a complementary density of at least 0.976 g/cm3, and (3) the overall bimodal copolymer has a relatively broad molecular weight distribution. This combination of properties can provide improved balance of stress crack resistance and processibility.
    Type: Application
    Filed: May 13, 2022
    Publication date: April 11, 2024
    Inventors: Keran Lu, Stephanie M. Whited, Mridula Kapur
  • Publication number: 20230407067
    Abstract: A polyethylene composition comprising suitable for use in injection molding, the polyethylene composition comprising: from 2 wt. % to 25 wt. % of a high molecular weight component consisting of an ethylene/alpha-olefin copolymer, wherein the high molecular weight component has a density of from 0.910 g/cc to 0.971 g/cc, a melt index (12.16) of greater than 0.5 g/10 min to less than 1.5 g/10 min, a molecular weight distribution (Mw/Mn) of 6.0 to 20.0; from 75 wt. % to 98 wt. % a low molecular weight component consisting of an ethylene homopolymer or an ethylene/alpha-olefin copolymer, wherein the ethylene homopolymer or an and a molecular weight distribution (Mw/Mn) of less than 6.0; wherein the polyethylene composition has a shrinkage anisotropy that is less than the shrinkage anisotropy of the low molecular weight component.
    Type: Application
    Filed: December 16, 2021
    Publication date: December 21, 2023
    Inventors: Keran Lu, Russell T. Cooper, Mubashir Qamar Ansari, Fengyi Zhang
  • Publication number: 20230348643
    Abstract: Embodiments of this disclosure are directed to ethylene-based polymers. The ethylene-based polymers are polymerized units derived from ethylene, diene, and optionally one or more C3-C12?-olefins. The ethylene-based polymer includes a melt strength greater than negative 17 times the log base 10 of the melt index plus 25 ((MS)>?17*log (MI)+25). In the equation, MS is the melt strength in cN and MI is the melt index in g/10 min according to ASTM D1238. The ethylene-based polymer also includes an average g? that is greater than 0.70. The average g? is an intrinsic viscosity ratio determined by gel permeation chromatography using a triple detector.
    Type: Application
    Filed: March 26, 2021
    Publication date: November 2, 2023
    Applicant: Dow Global Technologies LLC
    Inventors: Robert D.J. Froese, Keran Lu, Robert L. Sammler, Cornelis F.J. Den Doelder, Teresita Kashyap, Luca Martinetti
  • Patent number: 11667776
    Abstract: The present disclosure provides a fiber and fabrics made therefrom. In an embodiment, a fiber is provided and includes an odor control composition. The odor control composition includes (A) from 85 wt % to 99.5 wt % of an olefin-based polymer and (B) from 15 wt % to 0.5 wt % of an odor suppressant. The odor suppressant includes: (i) an ionomer, (ii) particles of zinc oxide, and (iii) particles of copper oxide.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: June 6, 2023
    Assignee: Dow Global Technologies LLC
    Inventors: Scott T. Matteucci, Jeffrey E. Bonekamp, Arkady L. Krasovskiy, Kefu Sun, Keran Lu, Ronald Wevers
  • Publication number: 20230125442
    Abstract: Embodiments of this disclosure are directed to ethylene-based polymers. The ethylene-based polymer are polymerized units derived from ethylene, diene, and optionally, one or more C3-C12 ?-olefins. The ethylene-based polymer includes a melt viscosity ratio (V0.1/V100) at 190 C greater than 20. The V0.1 is the viscosity of the ethylene-based polymer at 190 C at a frequency of 0.1 radians/second, and the V100 is the viscosity of the ethylene-based polymer at 190 C at a frequency of 100 radians/second. Additionally, the ethylene-based polymer includes an average g greater than 0.86, where the average g? is an intrinsic viscosity ratio determined by gel permeation chromatography using a triple detector.
    Type: Application
    Filed: March 26, 2021
    Publication date: April 27, 2023
    Applicant: Dow Global Technologies LLC
    Inventors: Robert D.J. Froese, Keran Lu, Robert L. Sammler, Cornelis F.J. Den Doelder
  • Publication number: 20230128663
    Abstract: The ethylene-based polymers include a low molecular weight polymer fraction and a high molecular weight polymer fraction, which are divided by Smax on a molecular weight distribution (MWD) curve determined via absolute gel permeation chromatography. The low molecular weight polymer fraction and the high molecular weight polymer fraction include a Ladder character, L, defined for a given absolute molecular weight (MW) as the fit of the log of the intrinsic viscosity [h] versus the log of the absolute MW (M) curve using the expression, log[?]=log(?)+? log(M)?L*? log(2) according to a Mark-Houwink-Sakurada curve, in which log(?) is the intercept and ax is the slope. The low molecular weight polymer fraction has an MW below Smax and all values of L between ?0.35 to 0.35; and the high molecular weight polymer fraction has an MW above Smax and a maximum value of L between 0.8 and 1.5.
    Type: Application
    Filed: March 26, 2021
    Publication date: April 27, 2023
    Applicant: Dow Global Technologies LLC
    Inventors: Robert D.J. Froese, Keran Lu, Robert L. Sammler
  • Publication number: 20230128870
    Abstract: The disclosure are directed to a process for polymerizing ethylene-based polymers. The process includes polymerizing ethylene and optionally one or more (C3-C14)?-olefin monomer, and at least one diene, in the presence of at least one multi-chain catalyst and at least one single-chain catalyst. The process may include a solvent. The multi-chain catalyst in the process includes a plurality of polymerization sites. Long-chain branched polymers are synthesized by connecting the two polymer chains of the multi-chain catalyst with the diene, the joining of the two polymer chains being performed in a concerted manner during the polymerization. The ethylene-based polymers are produced and include at least two molecular weight polymer fractions. The multi-chain catalyst produces the high molecular weight fraction, which is the long-chain branched polymer.
    Type: Application
    Filed: March 26, 2021
    Publication date: April 27, 2023
    Applicant: Dow Global Technologies LLC
    Inventors: Robert D.J. Froese, Keran Lu, Rachel E.M. Brooner, Jianbo Hou, Jerzy Klosin, Daniel J. Arriola
  • Patent number: 11634569
    Abstract: A composition for odor control includes (A) from 85 wt % to 99.5 wt % of an olefin-based compound and (B) from 15 wt % to 0.5 wt % of an odor suppressant. The odor suppressant includes a blend of (i) an ionomer, (ii) particles of zinc oxide, and (iii) particles of copper oxide. The composition has a methyl mercaptan odor suppression value of greater than 45% as measured in accordance with ASTM D5504-12.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: April 25, 2023
    Assignee: Dow Global Technologies LLC
    Inventors: Arkady L. Krasovskiy, Kefu Sun, Keran Lu, Scott T. Matteucci, Alexander Williamson, Jose Eduardo Ruiz, Jeffrey E. Bonekamp
  • Patent number: 11400692
    Abstract: The present disclosure provides a film. In an embodiment, a multilayer film is provided and includes (A) a seal layer, (B) a barrier layer, and (C) an odor control layer. The odor control layer includes an odor control composition containing (A) from 85 wt % to 99.5 wt % of an olefin-based polymer and (B) from 15 wt % to 0.5 wt % of an odor suppressant. The odor suppressant includes a blend of: (i) an ionomer, (ii) particles of zinc oxide, and (iii) particles of copper oxide. The composition has a methyl mercaptan odor suppression value of greater than 45% as measured in accordance with ASTM D5504-12.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: August 2, 2022
    Assignee: Dow Global Technologies LLC
    Inventors: Jeffrey E. Bonekamp, Ronald Wevers, Scott T. Matteucci, Arkady L. Krasovskiy, Kefu Sun, Keran Lu
  • Publication number: 20220176599
    Abstract: An injection molded cap or closure having a weld line, wherein the injection molded cap or closure is formed from an ethylene-based resin comprising a high molecular weight component and a low molecular weight component.
    Type: Application
    Filed: May 29, 2020
    Publication date: June 9, 2022
    Inventors: Keran Lu, Yijian Lin, Mridula Kapur, Tian Lan, Stephanie M. Whited, John L. Sugden, Siddharth Ram Athreya
  • Patent number: 11261316
    Abstract: The present disclosure provides a plastic living hinge. The plastic living hinge includes a blend containing (A) an ethylene-based polymer; and (B) a composite component selected from the group consisting of a block composite, a crystalline block composite, and a combination thereof.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: March 1, 2022
    Assignee: Dow Global Technologies LLC
    Inventors: Yijian Lin, Yushan Hu, Todd A. Hogan, Colin Li Pi Shan, Keran Lu, Mridula Kapur
  • Publication number: 20210363334
    Abstract: The present disclosure provides a fiber and fabrics made therefrom. In an embodiment, a fiber is provided and includes an odor control composition. The odor control composition includes (A) from 85 wt % to 99.5 wt % of an olefin-based polymer and (B) from 15 wt % to 0.5 wt % of an odor suppressant. The odor suppressant includes: (i) an ionomer, (ii) particles of zinc oxide, and (iii) particles of copper oxide.
    Type: Application
    Filed: August 26, 2019
    Publication date: November 25, 2021
    Inventors: Scott T. Matteucci, Jeffrey E. Bonekamp, Arkady L. Krasovskiy, Kefu Sun, Keran Lu, Ronald Wevers
  • Publication number: 20210363337
    Abstract: A composition for odor control includes (A) from 85 wt % to 99.5 wt % of an olefin-based compound and (B) from 15 wt % to 0.5 wt % of an odor suppressant. The odor suppressant includes a blend of (i) an ionomer, (ii) particles of zinc oxide, and (iii) particles of copper oxide. The composition has a methyl mercaptan odor suppression value of greater than 45% as measured in accordance with ASTM D5504-12.
    Type: Application
    Filed: August 26, 2019
    Publication date: November 25, 2021
    Inventors: Arkady L. Krasovskiy, Kefu Sun, Keran Lu, Scott T. Matteucci, Alexander Williamson, Jose Eduardo Ruiz, Jeffrey E. Bonekamp
  • Patent number: 11161949
    Abstract: The present disclosure provides a film. In an embodiment, a film for suppressing odors is provided and includes a composition of (A) from 85 wt % to 99 wt % of a thermoplastic polymer and (B) from 15 wt % to 1 wt % of an odor suppressant. The odor suppressant is a blend composed of (Bi) particles of zinc oxide and (Bii) zinc ionomer. The zinc oxide particles (Bi) have a D50 particle size from 100 nm to 3000 nm, a surface area from 1 m2/g to 9 m2/g, and a porosity less than 0.020 m3/g. The composition has a methyl mercaptan odor suppression value less than 70 at 3 days exposure to methyl mercaptan as measured in accordance with ASTM D5504-12.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: November 2, 2021
    Assignees: Dow Global Technologies LLC, Rohm and Haas Company
    Inventors: Arkady L. Krasovskiy, Kefu Sun, Keran Lu, Scott T. Matteucci, Alexander Williamson, Jose Eduardo Ruiz, Michelle Gallagher, Harpreet Singh
  • Patent number: 11161091
    Abstract: The present disclosure provides a composition. In an embodiment, the composition includes (A) from 85 wt % to 99 wt % of an olefin-based polymer and (B) from 15 wt % to 1 wt % of an odor suppressant. The odor suppressant is a blend of (i) particles of zinc oxide, and (ii) zinc ionomer. The zinc oxide particles have a D50 particle size from 100 nm to 3000 nm, a surface area from 1 m2/g to 9 m2/g, and a porosity less than 0.020 m3/g. The composition has a methyl mercaptan odor suppression value of less than 70 at 3 days as measured in accordance with ASTM D5504-12.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: November 2, 2021
    Assignees: Dow Global Technologies LLC, Rohm and Haas Company
    Inventors: Arkady L. Krasovskiy, Kefu Sun, Keran Lu, Scott T. Matteucci, Alexander Williamson, Jose Eduardo Ruiz, Harpreet Singh, Michelle Gallagher, Jeffrey E. Bonekamp
  • Patent number: 11131130
    Abstract: The present disclosure provides a plastic living hinge. The plastic living hinge includes a blend containing (A) an ethylene-based polymer; (B) a propylene-based polymer; and (C) a composite component selected from the group consisting of a block composite, a crystalline block composite, and a combination thereof.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: September 28, 2021
    Assignee: Dow Global Technologies LLC
    Inventors: Yijian Lin, Yushan Hu, Todd A. Hogan, Colin LiPiShan, Keran Lu, Mridula Kapur
  • Publication number: 20210187920
    Abstract: The present disclosure provides a film. In an embodiment, a multilayer film is provided and includes (A) a seal layer, (B) a barrier layer, and (C) an odor control layer. The odor control layer includes an odor control composition containing (A) from 85 wt % to 99.5 wt % of an olefin-based polymer and (B) from 15 wt % to 0.5 wt % of an odor suppressant. The odor suppressant includes a blend of: (i) an ionomer, (ii) particles of zinc oxide, and (iii) particles of copper oxide. The composition has a methyl mercaptan odor suppression value of greater than 45% as measured in accordance with ASTM D5504-12.
    Type: Application
    Filed: August 23, 2019
    Publication date: June 24, 2021
    Inventors: Jeffrey E. Bonekamp, Ronald Wevers, Scott T. Matteucci, Arkady L. Krasovskiy, Kefu Sun, Keran Lu
  • Patent number: 10738182
    Abstract: A molded article formed from a polymer composition, the polymer composition consisting essentially of: an ethylene homopolymer or ethylene/alpha-olefin copolymer; greater than 20 ppm of a fluoropolymer; and optionally, up to 5 wt. % of one or more of processing aids, acid neutralizers, stabilizers, phosphites, antioxidants, metal de-activators, pigments or colorants, or fillers; wherein the molded article exhibits an oxygen transmission rate [OTR, (cc*mm)/(m2*day*atm)]??3181 (cc2*mm)/g*m2*day*atm)×[Density, g/cc]+3077, (cc*mm)/(m2*day*atm).
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: August 11, 2020
    Assignee: Dow Global Technologies LLC
    Inventors: Keran Lu, Yijian Lin, Todd O. Pangburn, Siddharth Ram Athreya, Laura Nunez, John L. Sugden, Todd A. Hogan, Andrew Heitsch, David T. Gillespie
  • Publication number: 20200181341
    Abstract: The present disclosure provides a film. In an embodiment, a film for suppressing odors is provided and includes a composition of (A) from 85 wt % to 99 wt % of a thermoplastic polymer and (B) from 15 wt % to 1 wt % of an odor suppressant. The odor suppressant is a blend composed of (Bi) particles of zinc oxide and (Bii) zinc ionomer. The zinc oxide particles (Bi) have a D50 particle size from 100 nm to 3000 nm, a surface area from 1 m2/g to 9 m2/g, and a porosity less than 0.020 m3/g. The composition has a methyl mercaptan odor suppression value less than 70 at 3 days exposure to methyl mercaptan as measured in accordance with ASTM D5504-12.
    Type: Application
    Filed: February 22, 2019
    Publication date: June 11, 2020
    Inventors: Arkady L. Krasovskiy, Kefu Sun, Keran Lu, Scott T. Matteucci, Alexander Williamson, Jose Eduardo Ruiz, Michelle Gallagher, Harpreet Singh
  • Publication number: 20200123355
    Abstract: The present disclosure provides a plastic living hinge. The plastic living hinge includes a blend containing (A) an ethylene-based polymer; and (B) a composite component selected from the group consisting of a block composite, a crystalline block composite, and a combination thereof.
    Type: Application
    Filed: June 25, 2018
    Publication date: April 23, 2020
    Inventors: Yijian Lin, Yushan Hu, Todd A. Hogan, Colin Li Pi Shan, Keran Lu, Mridula Kapur