Abstract: A polyethylene composition comprising from about 0.5 to about 20 wt % of alpha-olefin derived units other than ethylene-derived units, with the balance including ethylene-derived units, total internal unsaturations (Vy1+Vy2+T1) of from about 0.10 to about 0.40 per 1000 carbon atoms, an MI of from about 0.1 to about 6 g/10 min, an HLMI of from about 5.0 to about 40 g/10 min, a density of from about 0.890 to about 0.940 g/ml, a Tw1-Tw2 value of from about ?25 to about ?20° C., an Mw1/Mw2 value of from about 1.2 to about 2.0, an Mw/Mn of from about 4.5 to about 12, an Mz/Mw of from about 2.0 to about 3.0, an Mz/Mn of from about 7.0 to about 20, and a g?(vis) greater than 0.90.
Type:
Grant
Filed:
June 22, 2018
Date of Patent:
March 15, 2022
Assignee:
ExxonMobil Chemical Patents Inc.
Inventors:
Dongming Li, Ching-Tai Lue, Adriana S. Silva, Matthew W. Holtcamp, Laughlin G. McCullough, David F. Sanders, Matthew S. Bedoya
Abstract: A catalyst mixture made from or containing (a) particles of a solid catalyst component comprising Ti, Mg, Cl, and (b) from 0.5 to 5.0% by weight, based upon the total weight of the mixture, of particles of a solid compound having particle size ranging from 0.1 ?m to 1 mm containing more than 50% by weight of SiO2 units.
Abstract: A process for the preparation of a solid catalyst component for the polymerization of CH2?CHR olefins, wherein R is hydrogen or hydrocarbyl radical with 1-12 carbon atoms, made from or containing a Ti compound on a Mg chloride based support, including the steps of (a) reacting a Mg based compound with a liquid medium made from or containing a Ti compound, at a temperature ranging from 0 to 150° C., thereby yielding solid particles; and (b) suspending the solid particles coming from step (a) in a liquid medium made from or containing hydrocarbons at a temperature ranging from 10 to 100° C., wherein step (a) or (b) is carried out in the presence of 0.2 to 20.0% by weight, with respect to the amount of Mg compound, of particles of a solid compound containing more than 50% by weight of SiO2 units and having average particle size from 1 to 100 ?m.
Type:
Grant
Filed:
September 7, 2018
Date of Patent:
March 8, 2022
Assignee:
Basell Poliolefine Italia S.r.l.
Inventors:
Diego Brita, Nicolo Arich De Finetti, Ofelia Fusco, Benedetta Gaddi
Abstract: The present invention relates to a transition metal compound for an olefin polymerization catalyst, the transition metal compound being represented by chemical formula 1. The description of chemical formula 1 is as defined in the specification.
Type:
Grant
Filed:
March 15, 2019
Date of Patent:
February 22, 2022
Assignee:
Hanwha Solutions Corporation
Inventors:
Na Young Park, Hyung Seung Lee, Lan Hua Piao, Seong Yeon Park, Wook Jeong
Abstract: The present disclosure relates to a polypropylene for injection having a high content of ultra-high molecular weight and excellent rigidity, and a method for preparing the same.
Type:
Grant
Filed:
November 1, 2018
Date of Patent:
February 15, 2022
Inventors:
Seok Hwan Kim, Hyunsup Lee, Seong Min Chae, Taejin Kim, Dae Sik Hong, Sang Jin Jeon, Hee Kwang Park
Abstract: The present invention relates to a hybrid supported metallocene catalyst including at least first metallocene compound, at least one second metallocene compound, at least one cocatalyst compound, and a carrier, a preparation method therefor, and a polyolefin resin polymerized in the presence of the catalyst, wherein the second metallocene compound is a compound of a bridged structure having a ligand of an asymmetric structure, and the polyolefin resin has a density of 0.910 g/cm3 to 0.960 g/cm3, a molecular weight density in a unimodal distribution of 3 to 5, a melt index of 0.05 to 100 at 2.16 kg, and a melt flow rate of 20 to 40.
Type:
Grant
Filed:
March 22, 2017
Date of Patent:
February 15, 2022
Assignee:
HANWHA CHEMICAL CORPORATION
Inventors:
Dong Wook Jeong, Dong Ok Kim, Ui Gab Joung
Abstract: Provided are a transition metal compound for an olefin polymerization catalyst, an olefin polymerization catalyst containing the transition metal compound, and a polyolefin prepared using the olefin polymerization catalyst for polymerization thereof, wherein the transition metal compound is represented by Chemical Formula A1 or Chemical Formula B1.
Type:
Grant
Filed:
December 6, 2017
Date of Patent:
February 1, 2022
Assignee:
HANWHA CHEMICAL CORPORATION
Inventors:
Hyun Seung Lee, Na Young Park, Seong Yeon Park, Hee Ju Yang, Sung Cheol Yoon
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
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
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.
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
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
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
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
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
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
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
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
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