Patents by Inventor George J. Pehlert
George J. Pehlert 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).
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Patent number: 11773235Abstract: Disclosed are compositions comprising at least one polyolefin, a hindered phenol, and a phenyl phosphite; wherein the overall concentration of the hindered phenol and phenyl phosphite is within a range from 10 ppm to 5000 ppm in the polyolefin, and wherein the amount of the hindered phenol is less than the phenyl phosphite. Also disclosed herein are compositions comprising at least one polypropylene, a neutralizer, a hindered phenol, and a phenyl phosphite; wherein the overall concentration of the hindered phenol and phenyl phosphite is within a range from 1000 ppm to 5000 ppm in the polyolefin, and wherein the amount of the hindered phenol is from 200 to 2000 ppm less than the phenyl phosphite.Type: GrantFiled: May 4, 2021Date of Patent: October 3, 2023Assignee: ExxonMobil Chemical Patents Inc.Inventors: Bin Zhao, Chen Wan, George J. Pehlert, Luis A. Sotomayor
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Publication number: 20230077569Abstract: Processes for forming a polypropylene composition are provided herein comprising the steps of making a first propylene-based copolymer having a molecular weight distribution between 3 to 8.5, and making a second propylene-based polymer in the presence of the first propylene-based polymer to produce the polypropylene composition having a high molecular weight tail in the amount of between 1.0 wt. % and 10.0 wt. %. The polypropylene compositions produced have a broad molecular weight distribution and high molecular weight tail to provide improved stiffness while retaining toughness.Type: ApplicationFiled: February 12, 2021Publication date: March 16, 2023Applicant: ExxonMobil Chemical Patents Inc.Inventors: George J. PEHLERT, Ranadip GANGULY, Christopher G. BAUCH, Blu E. ENGLEHORN, Xiaodan ZHANG, Mark S. CHAHL, Kevin W. LAWSON, Xuejia YAN
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Patent number: 11572462Abstract: A polypropylene composition suitable for foaming having improved processability but maintained strain hardening and the process to produce the polypropylene composition comprising combining a linear polypropylene having a melt strength within a range from 10 to 40 cN (190° C.) with an organic peroxide to obtain a branched polypropylene having a melt strength within a range from 20 to 80 cN (190° C.), wherein the melt strength of the branched polypropylene is greater than the melt strength of the linear polypropylene; and combining the branched polypropylene having a melt flow rate within a range of 0.1 to 20 g/10 min and an Mw/Mn of at least 5 with within a range from 5 to 40 wt % of a low molecular weight polyolefin having a melt flow rate of at least 50 g/10 min and an Mw/Mn of less than 5 to obtain the polypropylene composition.Type: GrantFiled: January 3, 2018Date of Patent: February 7, 2023Assignee: ExxonMobil Chemical Patents Inc.Inventors: Sasha P. Schmitt, George J. Pehlert
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Patent number: 11549006Abstract: A polypropylene comprising within a range from 0.1 wt % to 4 wt % ethylene and/or C4 to C12 ?-olefin derived units, one or more clarifiers, or both; wherein the polypropylene has a flexural modulus of at least 200 kpsi (0.05 in/min ASTM D790(A)) and an Mz/Mw of at least 4. The polypropylenes may be made by combining propylene and a comonomer with a Ziegler-Natta catalyst and at least two external electron donors, wherein the concentration of the electron donors is within a range from 1 to 100 ppm. The concentration of electron donors may be decreased to control the haze level of the polypropylene, and/or the level of comonomer derived units may be controlled to reduce the haze level of the polypropylene.Type: GrantFiled: April 27, 2018Date of Patent: January 10, 2023Assignee: ExxonMobil Chemical Patents Inc.Inventors: Caitlin A. Spofford, George J. Pehlert, Anthony Poloso, Adrian G. Barry, John M. Donahue
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Patent number: 11499031Abstract: A composition comprising the reaction product of a polypropylene comprising at least 50 mol % propylene, and having a molecular weight distribution (Mw/Mn) greater than 6, a branching index (g?vis) of at least 0.97, and a melt strength greater than 10 cN determined using an extensional rheometer at 190° C.; and within the range from 0.01 to 3 wt % of at least one organic peroxide, by weight of the polypropylene and organic peroxide. Such hyperbranched polypropylenes are useful in films, foamed articles, and thermoformed articles.Type: GrantFiled: December 4, 2019Date of Patent: November 15, 2022Assignee: ExxonMobil Chemical Patents Inc.Inventors: George J. Pehlert, Mosha H. Zhao
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Publication number: 20220332864Abstract: Provided herein are methods of polymerizing ?-olefin monomer with a catalyst and hydrogen in a slurry to produce low molecular weight polyolefins. Hydrogen is vented from the low molecular weight polyolefins and then the low molecular weight polyolefins are further polymerized in a gas phase to produce a polyolefin having a molecular weight distribution of between 4.0 and 30 and a flexural modulus between 1500 mPa and 2500 mPa.Type: ApplicationFiled: August 14, 2020Publication date: October 20, 2022Applicant: EXXONMOBIL CHEMICAL PATENTS INC.Inventors: Xiaodan ZHANG, Christopher G. BAUCH, Lubin LUO, Jeffrey L. BRINEN, George J. PEHLERT, Todd S. EDWARDS, Sung A. KIM
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Patent number: 11459453Abstract: Provided is a reactor grade polypropylene suitable for injection molding applications comprising within a range from 0 wt % to 4 wt % ethylene and/or C4 to C12 ?-olefin derived units, the polypropylene produced from a single catalyst and single stage polymerization process, and having a melt flow rate (MFR, 230° C./2.16 kg) greater than 10 g/10 min, and a 1% secant flexural modulus of at least 250 kpsi (1720 MPa).Type: GrantFiled: May 9, 2018Date of Patent: October 4, 2022Assignee: ExxonMobil Chemical Patents Inc.Inventors: George J. Pehlert, David K. Brown
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Patent number: 11414526Abstract: A method of melt blending a polypropylene and the melt blended polypropylene therefrom, comprising providing a base-polypropylene having a MFR of less than 15 g/10 min and a molecular weight distribution (Mw/Mn) within the range from 5 to 16, and comprising hindered phenol and phosphorous-type antioxidants, and within the range from 5 ppm to 4000 ppm of an alkyl radical scavenger relative to the total weight of the components to form a melt blended polypropylene; melt blending the melt blended polypropylene at a temperature of at least 210° C.; and isolating a melt blended, melt blended polypropylene.Type: GrantFiled: June 25, 2015Date of Patent: August 16, 2022Assignee: EXXONMOBIL CHEMICAL PATENTS INC.Inventors: George J. Pehlert, Mosha H. Zhao, Roswell E. King
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Patent number: 11390731Abstract: A process comprising combining a polymerization catalyst with propylene at a polymerization temperature to produce polypropylene granules having an MFR1, wherein the temperature of the polypropylene granules is maintained at least at the polymerization temperature; mixing the polypropylene granules with an organic peroxide at a temperature of at least the polymerization temperature for a residence time of at least 40 seconds at a temperature below the melting point temperature of the polypropylene granules to form a polypropylene product having an MFR2, wherein MFR1 is greater than MFR2.Type: GrantFiled: May 23, 2018Date of Patent: July 19, 2022Assignee: ExxonMobil Chemical Patents Inc.Inventors: Edward F. Allen, Jr., George J. Pehlert, Roger P. Volmer, Alan J. Oshinski, Sasha P. Schmitt
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Publication number: 20220056253Abstract: The present disclosure provides polypropylene compositions that have a high gloss and minimum or no haze while also having a high melt strength (e.g., high temperature resistance) and a relative high stiffness. Polypropylene compositions contain one or more base polypropylenes (e.g., trimmed polypropylenes (tPPs)) and one or more clarifying agents. The base or trimmed polypropylene contains at least 50 mol % of propylene and has a molecular weight distribution (Mw/Mn) in a range from 7 to 22, a z-average molecular weight of less than 2,500,000 g/mol, a branching index (g?vis) of at least 0.95, and a melt strength of less than 20 cN determined using an extensional rheometer at 190° C. The base or trimmed polypropylene can be produced from one or more high melt strength polypropylenes (HMS PPs).Type: ApplicationFiled: September 25, 2019Publication date: February 24, 2022Inventors: Sasha P. Schmitt, Caitlin A. Spofford, George J. Pehlert
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Publication number: 20220025143Abstract: The present disclosure relates to compositions including copolymers, and methods for making compositions. In an embodiment, a composition includes the product of a copolymer comprising at least 50 mol % propylene and at least 1 wt % of at least one of ethylene or a C4 to C10 ?-olefin, based on the total weight of the copolymer; and an organic peroxide. The copolymer has MwMALLS/MnMALLS of from 1 to 5. In an embodiment, a process to form a composition includes introducing a copolymer with an organic peroxide, the copolymer comprising at least 50 mol % propylene and at least 1 wt % of at least one of ethylene or a C4 to C10 ?-olefin, based on the total weight of the copolymer; and obtaining a composition comprising a product of the copolymer and the organic peroxide. The copolymer has MwMALLS/MnMALLS of from 1 to 5.Type: ApplicationFiled: September 6, 2019Publication date: January 27, 2022Inventors: Sasha P. Schmitt, George J. Pehlert, Stefan B. Ohlsson, Willy J.J. Leysen
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Publication number: 20210355297Abstract: Disclosed are compositions comprising at least one polyolefin, a hindered phenol, and a phenyl phosphite; wherein the overall concentration of the hindered phenol and phenyl phosphite is within a range from 10 ppm to 5000 ppm in the polyolefin, and wherein the amount of the hindered phenol is less than the phenyl phosphite. Also disclosed herein are compositions comprising at least one polypropylene, a neutralizer, a hindered phenol, and a phenyl phosphite; wherein the overall concentration of the hindered phenol and phenyl phosphite is within a range from 1000 ppm to 5000 ppm in the polyolefin, and wherein the amount of the hindered phenol is from 200 to 2000 ppm less than the phenyl phosphite.Type: ApplicationFiled: May 4, 2021Publication date: November 18, 2021Inventors: Bin Zhao, Chen Wan, George J. Pehlert, Luis A. Sotomayor
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Patent number: 11104783Abstract: A process to prepare a polypropylene, and the polypropylene and films therefrom, comprising combining a high melt strength polypropylene comprising at least 50 mol % propylene, and having a molecular weight distribution (Mw/Mn) greater than 6, a branching index (g?vis) of at least 0.95, and a melt strength of at least 20 cN determined using an extensional rheometer at 190° C., and within the range from 20 to 1000 ppm of a long half-life organic peroxide, and isolating the polypropylene, wherein the polypropylene thus formed has a molecular weight distribution (Mw/Mn) within a range of from 7 to 22, a z-average molecular weight of less than 1,600,000 g/mole, a branching index (g?vis) of at least 0.95; and a melt strength less than 20 cN.Type: GrantFiled: September 16, 2016Date of Patent: August 31, 2021Assignee: ExxonMobil Chemical Patents Inc.Inventors: George J. Pehlert, Stefan B. Ohlsson, Edward F. Allen, Jr., Juliet B. Wagner, Edward Y. Bylina
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Publication number: 20200325290Abstract: A composition suitable for a film having a 1% secant flexural modulus (MD or TD) of at least 55,000 psi and a dart drop impact of at least 500 g is provided. The composition comprises a broad molecular weight distribution polypropylene with at least 50 mol % propylene and having: a molecular weight distribution (Mw/Mn) greater than 6, a branching index (g?vis) of at least 0.95, and a melt strength of at least 2 cN; and a polyethylene with at least 70 mol % ethylene and having: a density of from 0.910 to 0.923 g/cm3, a melt index (I2) of from 0.1 to 1.2 g/10 min, a melt index ratio (I21/I2) of from 20 to 35, a weight average molecular weight (Mw) of from 150,000 to 400,000 g/mol, and an orthogonal comonomer distribution and/or at least a first peak and at least a second peak in a comonomer distribution analysis.Type: ApplicationFiled: April 6, 2018Publication date: October 15, 2020Inventors: Sasha L. Schmitt, Stefan B. Ohisson, Tyler M. Baran, Edward Y. Bylina, George J. Pehlert
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Publication number: 20200325320Abstract: A polypropylene comprising within a range from 0.1 wt % to 4 wt % ethylene and/or C4 to C12 ?-olefin derived units, one or more clarifiers, or both; wherein the polypropylene has a flexural modulus of at least 200 kpsi (0.05 in/min ASTM D790(A)) and an Mz/Mw of at least 4. The polypropylenes may be made by combining propylene and a comonomer with a Ziegler-Natta catalyst and at least two external electron donors, wherein the concentration of the electron donors is within a range from 1 to 100 ppm. The concentration of electron donors may be decreased to control the haze level of the polypropylene, and/or the level of comonomer derived units may be controlled to reduce the haze level of the polypropylene.Type: ApplicationFiled: April 27, 2018Publication date: October 15, 2020Inventors: Caitlin A. Spofford, George J. Pehlert, Anthony Poloso, Adrian G. Barry, John M. Donahue
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Publication number: 20200325318Abstract: A process comprising combining a polymerization catalyst with propylene at a polymerization temperature to produce polypropylene granules having an MFR1, wherein the temperature of the polypropylene granules is maintained at least at the polymerization temperature; mixing the polypropylene granules with an organic peroxide at a temperature of at least the polymerization temperature for a residence time of at least 40 seconds at a temperature below the melting point temperature of the polypropylene granules to form a polypropylene product having an MFR2, wherein MFR1 is greater than MFR2.Type: ApplicationFiled: May 23, 2018Publication date: October 15, 2020Inventors: Edward F. Allen, JR., George J. Pehlert, Roger P. Volmer, Alan J. Oshinski, Sasha P. Schmitt
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Publication number: 20200255641Abstract: A polypropylene composition suitable for foaming having improved processability but maintained strain hardening and the process to produce the polypropylene composition comprising combining a linear polypropylene having a melt strength within a range from 10 to 40 cN (190° C.) with an organic peroxide to obtain a branched polypropylene having a melt strength within a range from 20 to 80 cN (190° C.), wherein the melt strength of the branched polypropylene is greater than the melt strength of the linear polypropylene; and combining the branched polypropylene having a melt flow rate within a range of 0.1 to 20 g/10 min and an Mw/Mn of at least 5 with within a range from 5 to 40 wt % of a low molecular weight polyolefin having a melt flow rate of at least 50 g/10 min and an Mw/Mn of less than 5 to obtain the polypropylene composition.Type: ApplicationFiled: January 3, 2018Publication date: August 13, 2020Inventors: Sasha P. Schmitt, George J. Pehlert
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Publication number: 20200172716Abstract: Provided is a reactor grade polypropylene suitable for injection molding applications comprising within a range from 0 wt % to 4 wt % ethylene and/or C4 to C12 ?-olefin derived units, the polypropylene produced from a single catalyst and single stage polymerization process, and having a melt flow rate (MFR, 230° C./2.16 kg) greater than 10 g/10 min, and a 1% secant flexural modulus of at least 250 kpsi (1720 MPa).Type: ApplicationFiled: May 9, 2018Publication date: June 4, 2020Inventors: George J. Pehlert, David K. Brown
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Publication number: 20200109260Abstract: A composition comprising the reaction product of a polypropylene comprising at least 50 mol % propylene, and having a molecular weight distribution (Mw/Mn) greater than 6, a branching index (g?vis) of at least 0.97, and a melt strength greater than 10 cN determined using an extensional rheometer at 190° C.; and within the range from 0.01 to 3 wt % of at least one organic peroxide, by weight of the polypropylene and organic peroxide. Such hyperbranched polypropylenes are useful in films, foamed articles, and thermoformed articles.Type: ApplicationFiled: December 4, 2019Publication date: April 9, 2020Inventors: George J. Pehlert, Mosha H. Zhao
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Patent number: 10538645Abstract: A composition comprising the reaction product of a polypropylene comprising at least 50 mol % propylene, and having a molecular weight distribution (Mw/Mn) greater than 6, a branching index (g?vis) of at least 0.97, and a melt strength greater than 10 cN determined using an extensional rheometer at 190° C.; and within the range from 0.01 to 3 wt % of at least one organic peroxide, by weight of the polypropylene and organic peroxide. Such hyperbranched polypropylenes are useful in films, foamed articles, and thermoformed articles.Type: GrantFiled: January 21, 2016Date of Patent: January 21, 2020Assignee: ExxonMobil Chemical Patents Inc.Inventors: George J. Pehlert, Mosha H. Zhao