Patents by Inventor Ching-Tai Lue
Ching-Tai Lue 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: 11787881Abstract: A polyethylene composition having 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 0.15 to about 0.40 per 1000 carbon atoms, an MI of from about 0.1 to about 6 g/10 min, an HLM1 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 ?50 to about ?23° C., an Mw1/Mw2 value of from about 2.0 to about 3.5, an Mw/Mn of from about 4.5 to about 12, an Mz/Mw of from about 2.5 to about 3.0, an Mz/Mn of from about 15 to about 25, and a g?(vis) greater than 0.90.Type: GrantFiled: June 18, 2019Date of Patent: October 17, 2023Assignee: ExxonMobil Chemical Patents Inc.Inventors: Adriana S. Silva, Dongming Li, Ching-Tai Lue, Matthew W. Holtcamp, Subramaniam Kuppuswamy, David F. Sanders, Matthew S. Bedoya, Laughlin G. McCullough
-
Publication number: 20230250204Abstract: Catalyst systems and methods for making and using the same. A method of polymerizing olefins to produce a polyolefin polymer with a multimodal composition distribution, includes contacting ethylene and a comonomer with a catalyst system. The catalyst system includes a first catalyst compound and a second catalyst compound that are co-supported to form a commonly supported catalyst system. The first catalyst compound includes a compound with the general formula (C5HaR1b)(C5HcR2d)HfX2. The second catalyst compound comprises the following formula: wherein each R3 or R4 is independently H, a hydrocarbyl group, a substituted hydrocarbyl group, or a heteroatom group, wherein each R3 or R4 may be the same or different, and each X is independently a leaving group selected from a labile hydrocarbyl, a substituted hydrocarbyl, a heteroatom group, or a divalent radical that links to an R3 group.Type: ApplicationFiled: April 14, 2023Publication date: August 10, 2023Applicant: Univation Technologies, LLCInventors: Sun-Chueh Kao, Francis C. Rix, Ching-Tai Lue, Mark G. Goode, Dongming Li
-
Patent number: 11708438Abstract: A system and method of producing polyethylene, including: polymerizing ethylene in presence of a catalyst system in a reactor to form polyethylene, wherein the catalyst system includes a first catalyst and a second catalyst; and adjusting reactor conditions and an amount of the second catalyst fed to the reactor to control melt index (MI), density, and melt flow ratio (MFR) of the polyethylene.Type: GrantFiled: May 26, 2021Date of Patent: July 25, 2023Assignee: Univation Technologies, LLCInventors: Timothy M. Boller, Ching-Tai Lue, Francis C. Rix, Daniel P. Zilker, Jr., C. Jeff Harlan, James M. Farley, Fathi David Hussein, Dongming Li, Steven A. Best
-
Publication number: 20230174694Abstract: Catalyst systems and methods for making and using the same. A method of polymerizing olefins to produce a polyolefin polymer with a multimodal composition distribution, includes contacting ethylene and a comonomer with a catalyst system. The catalyst system includes a first catalyst compound and a second catalyst compound that are co-supported to form a commonly supported catalyst system. The first catalyst compound includes a compound with the general formula (C5HaR1b)(C5HcR2d)HfX2. The second catalyst compound includes at least one of the following general formulas: In both catalyst systems, the R groups can be independently selected from any number of substituents, including, for example, H, a hydrocarbyl group, a substituted hydrocarbyl group, or a heteroatom group, among others.Type: ApplicationFiled: January 30, 2023Publication date: June 8, 2023Applicant: Univation Technologies, LLCInventors: Francis C. Rix, Ching-Tai Lue, C. Jeff Harlan, Laughlin G. McCullough
-
Patent number: 11649331Abstract: Provided herein are polyethylene films made of the polyethylene blends having improved properties, particularly in Elmendorf tear and puncture resistance. The polyethylene blends include two primary polyethylene blends.Type: GrantFiled: November 13, 2019Date of Patent: May 16, 2023Assignee: ExxonMobil Chemical Patents Inc.Inventors: Ching-Tai Lue, Dongming Li, Hasnain Rangwalla, Matthew F. Yott
-
Patent number: 11643530Abstract: Embodiments relate to polyolefin compositions containing one or more high-density polyethylenes (HDPEs) and linear low-density polyethylenes (LLDPEs) and methods for forming the same. The polyolefin composition contains about 40 wt % to about 60 wt % of HDPE and about 40 wt % to about 60 wt % of LLDPE, by weight of the polyolefin composition. The HDPE has a density of greater than 0.93 g/cm3 and a melt index of about 0.2 dg/min to about 10 dg/min. The LLDPE has a density of less than 0.915 g/cm3 and a melt index of about 0.2 dg/min to about 10 dg/min. The polyolefin composition has a density of about 0.91 g/cm3 or greater, a melt index of about 0.5 dg/min to about 6 dg/min, and a Tw1?Tw2 value of about ?25° C. or less.Type: GrantFiled: April 12, 2021Date of Patent: May 9, 2023Assignee: ExxonMobil Chemical Patents Inc.Inventors: Dongming Li, Ching-Tai Lue, Qingyun Qian, Ling Ge, Gang Huang
-
Publication number: 20230022904Abstract: A polyethylene comprising of ethylene derived units and 0.5 wt % to 10 wt % C3 to C12 ?-olefin derived units may be synthesized using a mixed catalyst that comprises rac-dimethylsilylbis(tetrahydroindenyl)zirconium dichloride and a zirconium co-catalyst in a mole ratio of 50:50 to 90:10, and wherein the zirconium co-catalyst is a poor comonomer incorporator as compared to the rac-dimethylsilylbis(tetrahydroindenyl)zirconium dichloride catalyst. Such a polyethylene may have a density of 0.91 g/cm3 to 0.93 g/cm3, an I2 value of 0.5 g/10 min to 2 g/10 min, an I21 value of 25 g/10 min to 75 g/10 min, an I21/I2 ratio of 25 to 75, a molar reversed-co-monomer index (RCI,m) of 30 to 180, a phase angle equal or lower than 70° at complex modulus G* of 10,000 Pa, a ?2 of 1.5 radians to ?1.5 radians, and a low density population of 50% and 70% by weight of the polyethylene.Type: ApplicationFiled: November 18, 2020Publication date: January 26, 2023Inventors: Matthew W. HOLTCAMP, Matthew S. BEDOYA, Timothy M. BOLLER, Hasnain RANGWALLA, David F. SANDERS, Ching-Tai LUE, Dongming LI, Adriana S. SILVA, Ru XIE, Joseph A. MOEBUS
-
Patent number: 11274196Abstract: 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: GrantFiled: June 22, 2018Date of Patent: March 15, 2022Assignee: 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
-
Publication number: 20220025136Abstract: Provided herein are polyethylene films made of the polyethylene blends having improved properties, particularly in Elmendorf tear and puncture resistance. The polyethylene blends include two primary polyethylene blends.Type: ApplicationFiled: November 13, 2019Publication date: January 27, 2022Inventors: Ching-Tai LUE, Dongming LI, Hasnain RANGWALLA, Matthew F. YOTT
-
Publication number: 20220025135Abstract: Films produced with polyethylene blends having improved stiffness and heat sealing are provided herein. The films may have an average MD/TD 1% secant modulus greater than or equal to about 3300 psi. The films may also have a heat seal initiation temperature at 5 N of less than or equal to about 95° C. or a hot tack seal initiation temperature at 1 N of less than or equal to about 95° C.Type: ApplicationFiled: November 13, 2019Publication date: January 27, 2022Inventors: Ching-Tai LUE, Dongming LI, Matthew F. YOTT, Arturo LEYVA, Adriana S. SILVA, Matthew W. HOLTCAMP, Ryan W. IMPELMAN, Richard E. PEQUENO, Laughlin G. MCCULLOUGH, Hasnain RANGWALLA, James M. FARLEY
-
Patent number: 11203609Abstract: 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: GrantFiled: May 16, 2018Date of Patent: December 21, 2021Assignee: Univation Technologies, LLCInventors: C. Jeff Harlan, Ching-Tai Lue
-
Patent number: 11193008Abstract: A method for increasing the melt strength of a polyolefin polymer composition is provided. The method includes mixing a first polyolefin composition derived from at least one olefin polymerization catalyst (a) and at least one olefin polymerization catalyst (b) with a second polyolefin composition derived from the at least one olefin polymerization catalyst (b) or from at least one olefin polymerization catalyst (c), and obtaining the polyolefin polymer composition.Type: GrantFiled: March 23, 2018Date of Patent: December 7, 2021Assignee: ExxonMobil Chemical Patents Inc.Inventors: Ching-Tai Lue, Mark K. Davis, Wesley R. Mariott, Daniel P. Zilker, Phuong A. Cao
-
Publication number: 20210324185Abstract: Embodiments relate to polyolefin compositions containing one or more high-density polyethylenes (HDPEs) and linear low-density polyethylenes (LLDPEs) and methods for forming the same. The polyolefin composition contains about 40 wt % to about 60 wt % of HDPE and about 40 wt % to about 60 wt % of LLDPE, by weight of the polyolefin composition. The HDPE has a density of greater than 0.93 g/cm3 and a melt index of about 0.2 dg/min to about 10 dg/min. The LLDPE has a density of less than 0.915 g/cm3 and a melt index of about 0.2 dg/min to about 10 dg/min. The polyolefin composition has a density of about 0.91 g/cm3 or greater, a melt index of about 0.5 dg/min to about 6 dg/min, and a Tw1?Tw2 value of about ?25° C. or less.Type: ApplicationFiled: April 12, 2021Publication date: October 21, 2021Inventors: Dongming LI, Ching-Tai Lue, Qingyun Qian, Ling Ge, Gang Huang
-
Publication number: 20210284770Abstract: A system and method of producing polyethylene, including: polymerizing ethylene in presence of a catalyst system in a reactor to form polyethylene, wherein the catalyst system includes a first catalyst and a second catalyst; and adjusting reactor conditions and an amount of the second catalyst fed to the reactor to control melt index (MI), density, and melt flow ratio (MFR) of the polyethylene.Type: ApplicationFiled: May 26, 2021Publication date: September 16, 2021Applicant: Univation Technologies, LLCInventors: Timothy M. Boller, Ching-Tai Lue, Francis C. Rix, Daniel P. Zilker, JR., C. Jeff Harlan, James M. Farley, Fathi David Hussein, Dongming Li, Steven A. Best
-
Patent number: 11046796Abstract: The present disclosure provides films made of polyethylene (PE) compositions. In at least one embodiment, a film includes a polyethylene composition, comprising: ethylene content and from 0 to 25 mol % of C3-C40 olefin comonomer content, based upon the total weight of the polyethylene composition, the polyethylene composition having a total internal plus terminal unsaturation greater than 0.7 unsaturations per 1000 carbon atoms, the film having: an Elmendorf Tear value in the machine direction of from 10 g/mil to 300 g/mil, and a Dart Drop Impact of from 100 g/mil to 800 g/mil. In at least one embodiment, the present disclosure provides for processes to make a film.Type: GrantFiled: June 29, 2018Date of Patent: June 29, 2021Assignee: ExxonMobil Chemical Patents Inc.Inventors: Dongming Li, David M. Fiscus, Kevin A. Stevens, Ching-Tai Lue, Matthew W. Holtcamp
-
Patent number: 11034783Abstract: A system and method of producing polyethylene, including: polymerizing ethylene in presence of a catalyst system in a reactor to form polyethylene, wherein the catalyst system includes a first catalyst and a second catalyst; and adjusting reactor conditions and an amount of the second catalyst fed to the reactor to control melt index (MI), density, and melt flow ratio (MFR) of the polyethylene.Type: GrantFiled: February 18, 2019Date of Patent: June 15, 2021Assignee: Univation Technologies, LLCInventors: Timothy M. Boller, Ching-Tai Lue, Francis C. Rix, Daniel P. Zilker, Jr., C. Jeff Harlan, James M. Farley, Fathi David Hussein, Dongming Li, Steven A. Best
-
Publication number: 20210163639Abstract: A catalyst system including two or more metallocene catalysts and processes for using the same to produce polyolefin polymer compositions are provided. The polyolefin polymer compositions have a good balance of a melt index ratio and normalized melt strength.Type: ApplicationFiled: February 12, 2021Publication date: June 3, 2021Applicant: Univation Technologies, LLCInventors: Ching-Tai Lue, Phillip T. Matsunaga, Donna J. Crowther
-
Patent number: 10947329Abstract: A catalyst system including two or more metallocene catalysts and processes for using the same to produce polyolefin polymer compositions are provided. The polyolefin polymer compositions have a good balance of a melt index ratio and normalized melt strength.Type: GrantFiled: April 11, 2018Date of Patent: March 16, 2021Assignee: Univation Technologies, LLCInventors: Ching-Tai Lue, Phillip T. Matsunaga, Donna J. Crowther
-
Patent number: 10934376Abstract: Provided herein are polyethylene compositions with broad orthogonal composition distribution. The polyethylene compositions may comprise at least 65 wt % ethylene-derived units and from 0 to 35 wt % of C3 to C12 olefin comonomer-derived units, and furthermore may exhibit a reversed comonomer index (RCI,m) of 100 kg/mol or greater, a Tw1-Tw2 value of from ?16 to ?38° C., and an Mw1/Mw2 value of at least 0.9, such as 0.9 to 4. Also provided are processes for making the polyethylene compositions, as well as films made from the polyethylene compositions. Such films may feature superior film stiffness for a given polyethylene composition density, and accordingly such films in some embodiments have average MD/TD modulus and density satisfying the following equation: Avg. Modulus?1.2*(C1*Density?C2), where C1 and C2 are constants, such as C1=2,065,292 and C2=1,872,345.Type: GrantFiled: October 15, 2018Date of Patent: March 2, 2021Assignee: ExxonMobil Chemical Patents Inc.Inventors: Dongming Li, Matthew W. Holtcamp, Ching-Tai Lue, Adriana S. Silva, David F. Sanders, Subramaniam Kuppuswamy, Matthew S. Bedoya
-
Publication number: 20210054111Abstract: A mixed metallocene catalyst system can comprise at least one metallocene catalyst compound comprising a structure represented by formula (A) below and optionally at least one other metallocene catalyst compound having a structure represented by formula (B) below: A mixed metallocene catalyst system can additionally include a non-coordinating anion type activator comprising a supported alumoxane or aluminum alkyl, and optionally a scavenger. A process for making a polymeric product can comprise: contacting a C2-C22 alpha-olefin feed with the catalyst system to obtain a polymerization reaction mixture; and obtaining a polymer product from the polymerization reaction mixture. A polymer product can be made by the process.Type: ApplicationFiled: November 5, 2020Publication date: February 25, 2021Inventors: Matthew W. Holtcamp, Subramaniam Kuppuswamy, Matthew S. Bedoya, Kevin A. Stevens, Ching-Tai Lue, Hasnain Rangwalla