Patents Examined by Caixia Lu
  • Patent number: 11220566
    Abstract: The present invention relates to a method for preparing an ethylene-based elastic copolymer, and more particularly, to a method for preparing an ethylene-based elastic copolymer by using a catalyst composition for preparing an ethylene-based elastic copolymer, the catalyst composition comprising a binuclear constrained geometry transition metal compound, as a main catalyst, having a structural advantage to obtain a high-molecular-weight ethylene-based elastic copolymer due to a high polymerization activity and comonomer reactivity because the binuclear constrained geometry transition metal compound has a structure in which cyclopentadiene ligands of two constrained geometry catalysts are linked by 1,4-phenylene, and one or more cocatalyst compounds selected from the group consisting of an organoaluminum compound, an organoaluminoxane compound, and a boron compound.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: January 11, 2022
    Assignee: KUMHO POLYCHEM CO., LTD.
    Inventors: Hag-Jun Kim, Hyun-Soo Kim, Sung Kwan Kim, Sungwoo Yoon, Hee Ryoung Koo, Aujiru Son
  • Patent number: 11214631
    Abstract: This invention relates to catalyst systems comprising a catalyst compound having a bridged group 4 metal metallocene (where the bridge preferably contains an (Me2Si)2 group, an activator, and a support material. In some embodiments, the present disclosure provides for polyolefins and a process for producing a polyolefin composition comprising contacting at least one olefin with a catalyst system.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: January 4, 2022
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jian Yang, Gregory J. Karahalis, Timothy M. Boller, Yan Jiang
  • Patent number: 11203609
    Abstract: Embodiments of the present disclosure are directed towards metal complexes that can be utilized to form polymers. As an example, the present disclosure provides a metal complex of Formula I: wherein each Me represents methyl.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: December 21, 2021
    Assignee: Univation Technologies, LLC
    Inventors: C. Jeff Harlan, Ching-Tai Lue
  • Patent number: 11198779
    Abstract: The present invention relates to a propylene-butene copolymer resin composition used for non-woven fabric, a method of preparing the same, and spunbond non-woven fabric manufactured using the composition, and particularly, by optimizing a content of 1-buttene in a metallocene polypropylene resin composition to 0.5 to 5.0 wt %, while simultaneously optimizing both of a melt index and a residual stress ratio of the resin composition, has a merit of having a reduced modulus together with a high conversion rate to manufacture non-woven fabric which is softer than existing products while maintaining high strength.
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: December 14, 2021
    Inventors: Hee Kwang Park, Kyung Seop Noh, Sang Jin Jeon, Hyunsup Lee, In Sun Lee, Jin Hyun Park, Changkwon Chung
  • Patent number: 11198747
    Abstract: The present disclosure relates to dual catalyst systems and processes for use thereof. The present disclosure further provides a catalyst system that is a combination of at least two hafnium metallocene catalyst compounds. The catalyst systems may be used for olefin polymerization processes. The present disclosure further provides for polymers, which can be formed by processes and catalyst systems of the present disclosure.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: December 14, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Matthew W. Holtcamp, Laughlin G. McCullough, Kevin A. Stevens, Subramaniam Kuppuswamy, Matthew S. Bedoya
  • Patent number: 11192961
    Abstract: Methods for the production of heterophasic polymers in gas and slurry phase polymerization processes, and polymer compositions made therefrom, are disclosed herein.
    Type: Grant
    Filed: January 28, 2020
    Date of Patent: December 7, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Lubin Luo, Jeanette M. Diop, Jian Yang, Sudhin Datta, Patrick Brant
  • Patent number: 11186601
    Abstract: This invention relates to metallocene compounds represented by the formula: catalyst systems comprising said metallocene compound and an activator or a reaction product of the metallocene compound with the at least one activator, and polymerization processes using such metallocene compounds and activators, where Cpa and Cpb are optionally-substituted cyclopentadienyl rings; A is bridging group; q is zero or 1; Q is O, O(CR3R4)m, (CR3R4)mO, or (CR3R4)m; m is 0 to 18; Z is (CR3R4)2; LA is a Lewis acid; M is a transition metal; X1 and X2 are independently R5 or OR5; R1 and R2 are independently selected from optionally-substituted hydrocarbyl groups; R3 and R4 are independently selected from the group consisting of H, halogen, and an optionally-substituted hydrocarbyl group; and R5 is alkyl, aryl, perfluoroalkyl, or perfluoroaryl.
    Type: Grant
    Filed: August 27, 2019
    Date of Patent: November 30, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Matthew W. Holtcamp, Charles J. Harlan, Subramaniam Kuppuswamy, Matthew S. Bedoya, Kevin A. Stevens
  • Patent number: 11186665
    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: October 4, 2019
    Date of Patent: November 30, 2021
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Graham R. Lief, Qing Yang, Eric J. Haschke
  • Patent number: 11180589
    Abstract: The present invention relates to a novel metallocene catalyst compound for the production of a polyolefin resin having a high molecular weight and a wide molecular weight distribution or a method of preparing the same, and more particularly to a metallocene catalyst compound using a ligand containing a Group 15 or 16 element having a bulky substituent or a method of preparing the same. The present invention provides a novel metallocene catalyst compound represented by Chemical Formula 1 below.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: November 23, 2021
    Assignee: DL Chemical CO., LTD.
    Inventors: Seung Tack Yu, Yong Kim, Dong Sik Park, Yong Jae Jun
  • Patent number: 11180582
    Abstract: The present disclosure provides a method for improving the activity of Ziegler-Natta (ZN) catalysts. The method includes forming a modified precursor composition of a ZN catalyst by providing a precursor composition of the ZN catalyst for treatment with an aluminum alkyl compound in a liquid organic solvent. The precursor composition of the ZN catalyst includes at least one titanium compound. The at least one titanium compound in the precursor composition is treated with the aluminum alkyl compound in the liquid organic solvent, where the aluminum alkyl compound converts the at least one titanium compound in the precursor composition into a modified state of the ZN catalyst. At least a portion of the aluminum alkyl compound not consumed in converting the at least one titanium compound in the precursor composition into the modified state of the ZN catalyst and reaction by-product compounds in the liquid organic solvent are removed to form the modified precursor composition of the ZN catalyst.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: November 23, 2021
    Assignee: Univation Technologies, LLC
    Inventors: Kevin J. Cann, Michael D. Awe, Wesley R. Mariott
  • Patent number: 11161922
    Abstract: The present disclosure provides a method for preparing a catalyst system comprising contacting in an aliphatic solvent at a temperature of from less than 0° C. to ?60° C. at least one support material having absorbed water and at least one hydrocarbyl aluminum compound to form a supported alumoxane (catalyst precursor) and contacting the supported alumoxane with at least one catalyst compound having a Group 3 through Group 12 metal atom or lanthanide metal atom. The supported alumoxane may be heated prior to contact with the catalyst compound.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: November 2, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Lubin Luo, Anupriya Jain, Charles J. Harlan
  • Patent number: 11155656
    Abstract: An ethylene/1,3-butadiene copolymer containing ethylene units, butadiene units and UD units of cyclic, 1,2-cyclohexanediyl structure, and bearing, at one of its chain ends, an alkoxysilyl or silanol function, functional group F1 is provided.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: October 26, 2021
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventors: Julien Thuilliez, Vincent Lafaquiere, Leyla Pehlivan, Benoît MacQueron, Christophe Boisson, Franck D'Agosto
  • Patent number: 11142598
    Abstract: Catalyst systems and methods for making and using the same. A method of methylating a catalyst composition while substantially normalizing the entiomeric distribution is provided. The method includes slurrying the organometallic compound in dimethoxyethane (DME), and adding a solution of RMgBr in DME, wherein R is a methyl group or a benzyl group, and wherein the RMgBr is greater than about 2.3 equivalents relative to the organometallic compound. After the addition of the RMgBr, the slurry is mixed for at least about four hours. An alkylated organometallic is isolated, wherein the methylated species has a meso/rac ratio that is between about 0.9 and about 1.2.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: October 12, 2021
    Assignee: Univation Technologies, LLC
    Inventors: Francis C. Rix, Alexander D. Todd, C. Jeff Harlan
  • Patent number: 11130827
    Abstract: This invention relates to a polyethylene composition, and films therefrom, comprising at least 65 wt % ethylene derived units and from 0.1 to 35 wt % of C3-C12 olefin comonomer derived units, where the polyethylene composition has: a) an RCI,m of less than 85 kg/mol; b) a Tw1?Tw2 value of from ?15 to ?40° C.; and c) an Mw1/Mw2 value of less than 1.5 where the film has a) a heat seal initiation temperature of X ° C. or less at 5 N of force, where X=0.0015×Y(psi)+62.6 (where Y is the average 1% Secant modulus ((MD+TD)/2)) of the film; b) a dart drop impact of 300 g/mil or more; c) an MD Elmendorf tear of 230 g or more; and d) average 1% Secant modulus ((MD+TD)/2) of 20,000 psi or more.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: September 28, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Dongming Li, Jian Yang, Kevin A. Stevens, Yan Jiang, Gregory J. Smith-Karahalis
  • Patent number: 11130826
    Abstract: A catalytic system based at least on a preformation monomer selected from the group consisting of 1,3-dienes, ethylene, ?-olefins and their mixtures, on a metallocene of formula {P(Cp)(Flu)LnG} and on an organometallic compound as cocatalyst is provided. In the formula, Ln denotes a metal atom which is a rare earth metal, G denotes a group comprising the borohydride BH4 unit or denotes a halogen atom X selected from the group consisting of chlorine, fluorine, bromine and iodine, Cp denotes a cyclopentadienyl group of formula C5H4, Flu denotes a fluorenyl group of formula C13H8, P being a group bridging the two Cp and Flu groups and comprising a silicon or carbon atom. Such a catalytic system exhibits an improved stability of the catalytic activity over time, in particular on storage.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: September 28, 2021
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventors: Vincent Lafaquiere, Julien Thuilliez
  • Patent number: 11117991
    Abstract: Methods for olefin polymerization are described. The methods include a) forming a first polyolefin under a first set of polymerization conditions in the presence of a first catalyst composition and a first concentration of at least a first continuity additive composition, the first polyolefin composition having a target density, ?1, and a target Flow Index, FI1; and b) forming a second polyolefin composition under a second set of polymerization conditions in the presence of a second catalyst composition and a second concentration of a second continuity additive composition, the second polyolefin composition having a target density, ?2, and a target Flow Index, FI2; wherein the process is essentially free of providing a polymerization neutralizing composition between steps a) and b).
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: September 14, 2021
    Assignee: Univation Technologies, LLC
    Inventors: Bruce J. Savatsky, R. Eric Pequeno, Brandon C. Locklear
  • Patent number: 11111257
    Abstract: A compound by the name 1,1,1-tris(di(3,5-dimethoxyphenyl)phosphino-methyl)ethane. The compound can be represented by the structure of formula (I): The compound is useful as a ligand for ruthenium to form an organometallic complex. The complex is an active catalyst for the hydrogenolysis of amides to form amines and optionally alcohols.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: September 7, 2021
    Assignee: Eastman Chemical Company
    Inventors: Jürgen Klankermayer, Stefan Westhues, Walter Leitner, Robert Thomas Hembre
  • Patent number: 11104755
    Abstract: A copolymer of a 1,3-diene and of an olefin selected from the group consisting of ?-monoolefins, ethylene and mixtures thereof is provided. The copolymer bears, at one of its chain ends, an alkoxysilyl or silanol function, functional group F1, and the copolymer is different from a copolymer of a 1,3-diene and a vinylaromatic monomer.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: August 31, 2021
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventors: Julien Thuilliez, Vincent Lafaquiere, Leyla Pehlivan, Benoît Macqueron, Christophe Boisson, Franck D'Agosto
  • Patent number: 11091568
    Abstract: The present invention relates to a hybrid supported metallocene catalyst and a polyolefin preparation method using the same. Using the hybrid supported metallocene catalyst can not only significantly reduce the amount of wax produced when polymerizing olefin monomers, but can also enhance the stress cracking resistance of the polyolefin that is prepared.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: August 17, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Eun Kyoung Song, Hyuck Ju Kwon, Yi Young Choi, Bog Ki Hong, Kyung Jin Cho, Joong Soo Kim, Sun Mi Kim
  • Patent number: 11084894
    Abstract: A process for making a poly alpha-olefin (PAO) having a relatively high vinylidene content (or combined vinylidene and tri-substituted vinylene content) and a relatively low vinyl and/or di-substituted vinylene content, as well as a relatively low molecular weight. The process includes: contacting a feed containing a C2-C32 alpha-olefin with a catalyst system comprising activator and a bis-cyclopentadienyl metallocene compound, typically a cyclopentadienyl-benzindenyl group 4 transition metal compound.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: August 10, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jian Yang, Jo Ann M. Canich, Hua Zhou, Jennifer L. Rapp