Patents Examined by Caixia Lu
  • Patent number: 12004429
    Abstract: To provide a piezoelectric body film that can suppress decrease in the piezoelectric constant d31, a method of producing a piezoelectric body film, and a piezoelectric body device. A piezoelectric body film comprising a fluororesin as a piezoelectric material, the fluororesin containing, as a main constituent unit, a repeating unit derived from vinylidene fluoride, a piezoelectric constant d31 of the piezoelectric body film being 20 pC/N or greater, and an extrapolated onset temperature at start of shrinkage determined by TMA measurement being not lower than 90° C. and not higher than 115° C. The difference between piezoelectric constants d31 measured before and after heating the piezoelectric body film at 100° C. for 24 hours relative to the piezoelectric constant d31 before the heating for 24 hours is 20% or less.
    Type: Grant
    Filed: September 11, 2023
    Date of Patent: June 4, 2024
    Assignee: KUREHA CORPORATION
    Inventors: Yusuke Sato, Hisaaki Terashima, Nobufumi Sato, Kazuyuki Kanno, Keiko Aita
  • Patent number: 11999761
    Abstract: An iodine compound represented by formula (3) and a polymerization inhibitor including the iodine compound, wherein R21 to R25 are as defined herein, X1 is an n1-valent group, and n1 is an integer of 1 to 10:
    Type: Grant
    Filed: November 5, 2020
    Date of Patent: June 4, 2024
    Assignees: OCHANOMIZU UNIVERSITY, DAIKIN INDUSTRIES, LTD.
    Inventors: Tomoko Yajima, Tadashi Kanbara, Tsuyoshi Noguchi
  • Patent number: 11999814
    Abstract: Sulfated bentonite compositions are characterized by a total pore volume from 0.4 to 1 mL/g, a total BET surface area from 200 to 400 m2/g, and an average pore diameter from 55 to 100 Angstroms. The sulfated bentonite compositions also can be characterized by a d50 average particle size in a range from 15 to 50 ?m and a ratio of d90/d10 from 3 to 15. The sulfated bentonite compositions can contain a sulfated bentonite and from 10 to 90 wt. % of colloidal particles, or the sulfated bentonite compositions can contain a sulfated bentonite and from 0.2 to 10 mmol/g of zinc and/or phosphorus. These compositions can be utilized in metallocene catalyst systems to produce ethylene based polymers.
    Type: Grant
    Filed: December 13, 2022
    Date of Patent: June 4, 2024
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Max P. McDaniel, Qing Yang, Ryan N. Rose, Kathy S. Clear, Graham R. Lief, Eric D. Schwerdtfeger, Anand Ramanathan, Jeremy M. Praetorius, Connor D. Boxell
  • Patent number: 11993667
    Abstract: Disclosed are metallocene compounds, catalyst compositions comprising at least one metallocene compound, processes for polymerizing olefins, methods for making catalyst compositions, olefin polymers and articles made from olefin polymers. In an aspect, a metallocene compound and catalyst composition are disclosed in which the metallocene contains at least one indenyl ligand, the indenyl ligand containing at least one halogenated substituent, such as a fluorinated substituent. These metallocene compounds and catalyst compositions can produce polyethylene having unexpectedly low levels of short chain branching.
    Type: Grant
    Filed: September 3, 2021
    Date of Patent: May 28, 2024
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Graham R. Lief, Qing Yang, Eric J. Haschke
  • Patent number: 11976164
    Abstract: The present disclosure relates to a method of preparing an organic zinc catalyst through solid phase blending that does not require a solvent and a washing process, and a method of preparing a polyalkylene carbonate resin by using the organic zinc catalyst prepared thereby.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: May 7, 2024
    Assignee: LG Chem, Ltd.
    Inventors: Sung Kyoung Kim, Seung Young Park, Sang Cheol Shin, Kyung Min Min
  • Patent number: 11972941
    Abstract: Proposed is a precursor composition for forming a metal film including a zirconium compound represented by any one of Chemical Formulas 1 to 3 and a hafnium compound represented by any one of Chemical Formulas 4 to 6.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: April 30, 2024
    Assignee: SK TRICHEM
    Inventors: Chang Sung Hong, Yong Joo Park, Tae Hoon Oh, In Chun Hwang, Sang Kyung Lee, Dong Hyun Kim
  • Patent number: 11969718
    Abstract: Supported chromium catalysts with an average valence less than +6 and having a hydrocarbon-containing or halogenated hydrocarbon-containing ligand attached to at least one bonding site on the chromium are disclosed, as well as ethylene-based polymers with terminal alkane, aromatic, or halogenated hydrocarbon chain ends. Another ethylene polymer characterized by at least 2 wt. % of the polymer having a molecular weight greater than 1,000,000 g/mol and at least 1.5 wt. % of the polymer having a molecular weight less than 1000 g/mol is provided, as well as an ethylene homopolymer with at least 3.5 methyl short chain branches and less than 0.6 butyl short chain branches per 1000 total carbon atoms.
    Type: Grant
    Filed: February 10, 2023
    Date of Patent: April 30, 2024
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Masud M. Monwar, Carlos A. Cruz, Jared L. Barr, Max P. McDaniel
  • Patent number: 11958929
    Abstract: An organometallic complex, a catalyst composition employing the same, and a method for preparing polyolefin are provided. The organometallic compound has a structure represented by Formula (I) wherein M is Ti, Zr, or Hf; X is —O—, or —NR6—; R1 and R2 are independently hydrogen, C1-6 alkyl group, C6-12 aryl group, or R1 and R2 are combined with the carbon atoms, to which they are attached, to form an C6-12 aryl moiety; R3, R4 and R5 are independently fluoride, chloride, bromide, C1-6 alkyl group, C6-12 aryl group, C3-6 hetero aryl group, C7-13 aryl alkyl group or C7-12 alkyl aryl group; and R6 is hydrogen, C6-12 aryl group or C7-12 alkyl aryl group.
    Type: Grant
    Filed: June 24, 2022
    Date of Patent: April 16, 2024
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Chien-Wei Hsu, Jyun-Wei Hong, Pao Tsern Lin, Shu-Hua Chan
  • Patent number: 11958962
    Abstract: A polyethylene homopolymer composition comprises: a first ethylene homopolymer having a density, d1 of from 0.943 to 0.975 g/cm3, a melt index, I21 of from 0.01 to 10 g/10 min, and a molecular weight distribution, Mw/Mn of less than 3.0; and a second ethylene homopolymer having a density, d2 of from 0.950 to 0.985 g/cm3, a melt index, I22 of at least 500 g/10 min, and a molecular weight distribution, Mw/Mn of less than 3.0; wherein the ratio of the melt index, I22 of the second ethylene homopolymer to the melt index, I21 of the first ethylene homopolymer is at least 50. The polyethylene homopolymer compositions which may be nucleated have a weight average molecular weight, Mw of ?75,000, a high load melt index, I21 of at least 200 g/10 min, a molecular weight distribution, Mw/Mn of from 4.0 to 12.0 and may be usefully employed in molding applications, such as, for example, in compression molded closures.
    Type: Grant
    Filed: November 28, 2019
    Date of Patent: April 16, 2024
    Assignee: NOVA Chemicals (International) S.A.
    Inventor: XiaoChuan Wang
  • Patent number: 11958961
    Abstract: A polyethylene homopolymer composition comprises: a first ethylene homopolymer having a density, d1 of from 0.930 to 0.975 g/cm3, a melt index, I21 of from 0.01 to 10 g/10 min, and a molecular weight distribution, Mw/Mn of less than 2.5; and a second ethylene homopolymer having a density, d2 of from 0.945 to 0.980 g/cm3, a melt index, I22 of at least 1.0 g/10 min, and a molecular weight distribution, Mw/Mn of less than 2.5; wherein melt index, I22 of the second ethylene homopolymer is greater than the melt index, I21 of the first ethylene homopolymer. The polyethylene homopolymer compositions which may be nucleated have a weight average molecular weight, Mw of ?75,000, a molecular weight distribution, Mw/Mn of less than 4.0 and may be usefully employed in molding applications, such as, for example, in compression molded closures.
    Type: Grant
    Filed: November 28, 2019
    Date of Patent: April 16, 2024
    Assignee: NOVA Chemicals (International) S.A.
    Inventor: XiaoChuan Wang
  • Patent number: 11963454
    Abstract: To provide a piezoelectric body film that can suppress decrease in the piezoelectric constant d31, a method of producing a piezoelectric body film, and a piezoelectric body device. A piezoelectric body film comprising a fluororesin as a piezoelectric material, the fluororesin containing, as a main constituent unit, a repeating unit derived from vinylidene fluoride, a piezoelectric constant d31 of the piezoelectric body film being 20 pC/N or greater, and an extrapolated onset temperature at start of shrinkage determined by TMA measurement being not lower than 90° C. and not higher than 115° C. The difference between piezoelectric constants d31 measured before and after heating the piezoelectric body film at 100° C. for 24 hours relative to the piezoelectric constant d31 before the heating for 24 hours is 20% or less.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: April 16, 2024
    Assignee: KUREHA CORPORATION
    Inventors: Yusuke Sato, Hisaaki Terashima, Nobufumi Sato, Kazuyuki Kanno, Keiko Aita
  • Patent number: 11952444
    Abstract: The present invention relates to a polyethylene resin prepared using a continuous process having and at least one metallocene catalyst composition: a molecular weight distribution Mw/Mn lower than 6.5; a molecular weight distribution Mw/Mn of at least 3.5; a melt index ranging from an HLMI of at least 1.20 g/10 min to an MI2 of at most 6.0 g/10 min wherein MI2 is determined according to ISO 1133:1997 at a temperature of 190° C. and under a load of 2.16 kg, and HLMI is determined according to ISO 1133:1997, at a temperature of 190° C. and under a load of 21.6 kg; melt index ratio HLMI/MI2 below or equal to 30; and a melt strength of X in Newtons, as determined by Göttfert Rheotens Melt Strength Apparatus, 190° C., as described in the Experimental section, satisfying the following equations (1) and/or (2) X is greater than ?0.026 ln(MI2)+0.0498??(1) X is greater than ?0.026 ln(HLMI)+0.1334??(2) with Mw being the weight-average molecular weight and Mn being the number-average molecular weight.
    Type: Grant
    Filed: October 14, 2019
    Date of Patent: April 9, 2024
    Assignee: TOTAL RESEARCH & TECHNOLOGY FELUY
    Inventors: Virginie Cirriez, Alexandre Welle, Aurélien Vantomme, Pierre Bernard
  • Patent number: 11945938
    Abstract: Ethylene-based polymers are characterized by a density from 0.92 to 0.955 g/cm3, a HLMI of less than 35 g/10 min, and a ratio of a number of short chain branches (SCBs) per 1000 total carbon atoms at Mz to a number of SCBs per 1000 total carbon atoms at Mn in a range from 11.5 to 22. These polymers can have a higher molecular weight (HMW) component and a lower molecular weight (LMW) component, in which a ratio of a number of SCBs per 1000 total carbon atoms at Mn of the HMW component to a number of SCBs per 1000 total carbon atoms at Mn of the LMW component is in a range from 10.5 to 22. These ethylene polymers can be produced using a dual catalyst system containing an unbridged metallocene compound with an indenyl group having at least one halogen-substituted hydrocarbyl substituent with at least two halogen atoms, and a single atom bridged metallocene compound with a fluorenyl group and a cyclopentadienyl group.
    Type: Grant
    Filed: April 20, 2023
    Date of Patent: April 2, 2024
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Graham R. Lief, Qing Yang, Youlu Yu
  • Patent number: 11926691
    Abstract: A method of making a polyolefin nanocomposite including, mixing a zinc-aluminum layered double hydroxide (LDH), and a zirconocene complex in a non-polar solvent to form a first mixture. Prior to the mixing the zirconocene complex is not supported on the zinc-aluminum LDH. The method further includes sonicating the first mixture for at least one hour to form a homogeneous slurry. The method further includes degassing the homogenous slurry and adding at least one olefin gas to form a second mixture. The method further includes adding an aluminoxane catalyst to the second mixture and reacting for at least 10 minutes to form a reaction mixture including the polyolefin nanocomposite. The method further includes separating the polyolefin nanocomposite from the reaction mixture.
    Type: Grant
    Filed: May 5, 2023
    Date of Patent: March 12, 2024
    Assignees: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, S-Oil Corporation
    Inventors: Mamdouh A. Al-Harthi, Sung-Gil Hong, Hassam Mazhar, Farrukh Shehzad
  • Patent number: 11926692
    Abstract: The present invention relates to a transition metal compound for a catalyst for olefin polymerization and to a catalyst for olefin polymerization comprising the same. Specifically, the present invention relates to a transition metal compound for an olefin polymerization catalyst in which an allyltrimethylsilane substituent is introduced into the cyclopentadienyl group and to a catalyst for olefin polymerization comprising the same.
    Type: Grant
    Filed: November 11, 2019
    Date of Patent: March 12, 2024
    Assignee: HANWHA SOLUTIONS CORPORATION
    Inventors: SeongYeon Park, Wook Jeong, Lanhua Piao, HyunSeung Lee
  • Patent number: 11925926
    Abstract: Platinum complexes having ferrocene-diphosphine ligands for catalysis of the hydroxycarbonylation of ethylenically unsaturated compounds.
    Type: Grant
    Filed: December 7, 2021
    Date of Patent: March 12, 2024
    Assignee: EVONIK OXENO GMBH & CO. KG
    Inventors: Carolin Schneider, Ralf Jackstell, Matthias Beller, Robert Franke
  • Patent number: 11919980
    Abstract: The present invention relates to a catalyst composition comprising: catalyst component A comprising a bridged metallocene compound with two tetrahydroindenyl groups, each group being unsubstituted or substituted; catalyst component B comprising a bridged metallocene compound with a substituted or unsubstituted cyclopentadienyl group and a substituted or unsubstituted fluorenyl group; an optional activator; an optional support; and an optional co-catalyst. The present invention also relates to a polymerization process using said composition. The invention further relates to olefin polymers at least partially catalyzed by said catalyst composition and articles comprising said olefin polymers.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: March 5, 2024
    Assignee: TOTAL RESEARCH & TECHNOLOGY FELUY
    Inventors: Virginie Cirriez, Alexandre Welle, Aurélien Vantomme
  • Patent number: 11918978
    Abstract: Provided is a method of preparing a superabsorbent polymer. More specifically, provided is a method of preparing a superabsorbent polymer capable of exhibiting improved initial absorbency and a rapid absorption rate by polymerizing monomers having acidic groups, of which part is neutralized with a basic material including potassium hydroxide, in the presence of an encapsulated foaming agent.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: March 5, 2024
    Assignee: LG Chem, Ltd.
    Inventors: Seul Ah Lee, Gicheul Kim, Dae Woo Nam, Ki Hyun Kim, Jun Kyu Kim, Young Jae Hur
  • Patent number: 11911746
    Abstract: A method for manufacturing a water absorption treatment material made of a plurality of grains includes a preparing step, a pulverizing step, a core portion forming step, and a coating portion forming step. The preparing step is a step of preparing a paper powder to which water-absorbent polymers adhere, the paper powder being derived from a sanitary product. The pulverizing step is a step of pulverizing remaining polymers using a pulverizer. The core portion forming step is a step of forming a core portion constituting each of the grains The coating portion forming step is a step of forming a coating portion so as to cover the core portion, the coating portion containing the paper powder, and the remaining polymers pulverized in the pulverizing step. In the pulverizing step, the remaining polymers left in a state of adhering to the paper powder are subjected to the pulverizer.
    Type: Grant
    Filed: October 29, 2020
    Date of Patent: February 27, 2024
    Assignee: DAIKI CO., LTD.
    Inventor: Junji Yoshinaga
  • Patent number: 11897976
    Abstract: A process or apparatus for producing polyethylene with improved film thinning and handleability involves polymerizing high-pressure ethylene using an autoclave-type reactor in the presence of a polymerization initiator. The reaction zone of the reactor has at least two different temperature sections; the polymerization initiator and the ethylene are supplied to the upstream temperature section in the reaction zone and the ethylene is polymerized to generate polyethylene; unreacted ethylene and the polyethylene generated at the upstream temperature section in the reactor flow into the downstream temperature section in communication with the upstream temperature section, so that additional polyethylene is generated at the downstream temperature section. A difference (?T [° C.]) between a temperature (T1 [° C.]) of the temperature section positioned upstream and a temperature (T2 [° C.
    Type: Grant
    Filed: March 24, 2022
    Date of Patent: February 13, 2024
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Kensuke Naraki, Toshihiko Manami