Patents by Inventor Rongjuan Cong
Rongjuan Cong 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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Publication number: 20190263950Abstract: The invention provides compositions, each comprising an ethylene/alpha-olefin interpolymer, which has a reduced level of a low density, low molecular weight oligomeric fraction, as indicated by an HCC value, as described herein, and reduced levels of inorganic content or lower Tm. The invention also provides processes for forming such interpolymers.Type: ApplicationFiled: May 7, 2019Publication date: August 29, 2019Inventors: Frank J. Cerk, Rongjuan Cong, Shrikant Dhodapkar, Selim Yalvac, Morgan M. Hughes, Timothy W. Gambrel, Yi Jin
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Patent number: 10363700Abstract: The present invention discloses a process for forming a biaxially oriented film. The process includes first selecting a polyolefin resin wherein said polyolefin resin comprises a linear low density polyethylene resin characterized by having from 9 to 35 weight percent of the total weight of linear low density polyethylene resin eluting from a CEF at a temperature greater than 97.0° C.; and further characterized by having a CDR of from 33 to 80 and a Mw Ratio of from 0.15 to 0.45. Next a film is formed from the polyolefin resin selected in the first step. Finally the film formed in the second step is oriented in a sequential manner. The films produced by this process are characterized by having an ultimate elongation at least 1.5 times greater in the MD as compared to the CD and the 2% secant modulus is a least 1.25 times greater in the CD as compared to the MD.Type: GrantFiled: August 26, 2011Date of Patent: July 30, 2019Assignee: Dow Global Technologies LLCInventors: Xiao B. Yun, Rongjuan Cong, Jephrey Pan, Teresa P. Karjala
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Publication number: 20190210333Abstract: Embodiments of the present invention relate to biaxially oriented, multilayer polyethylene films and to laminates and articles formed therefrom. In one aspect, a biaxially oriented, multilayer polyethylene film comprises Layer A which is a sealant layer p having a top facial surface and a bottom facial surface and comprising a first polyethylene, wherein the first polyethylene has a density of at least 0.900 g/cm3, an IHDF>95 of 20-60 kg/mol, and a MWHDF>95 of greater than 130 kg/mol, wherein Layer A comprises at least 50 weight percent of the first polyethylene based on the weight of Layer A, and Layer B having a top facial surface and a bottom facial surface, wherein Layer B comprises one or more additional polyethylenes, and wherein the top facial surface of Layer B is in adhering contact with a bottom facial surface of Layer A, wherein the density of the first polyethylene is at least 0.002 g/cm3 less than the density of Layer B.Type: ApplicationFiled: August 14, 2017Publication date: July 11, 2019Applicant: Dow Global Technologies LLCInventors: Jianping Pan, Xiao Bing Yun, Yijian Lin, Rongjuan Cong
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Patent number: 10274465Abstract: The invention provides an apparatus for polymer chromatography, comprising at least one column that comprises a first stationary phase comprising one of the following: A) a material comprising at least one non-carbon atom, excluding glass or a metal, selected from molybdenum sulfide MoS2, tungsten sulfide WS2, silicon carbide SiC, boron nitride BN, or combinations thereof, or B) glass, or a metal, or combinations thereof, and a material comprising at least one non-carbon atom selected from molybdenum sulfide MoS2, tungsten sulfide WS2, silicon carbide SiC, boron nitride BN, or combinations thereof. The invention also provides a method for polymer chromatography, comprising introducing a solution, comprising a polymer, into a liquid flowing through a first stationary phase, and wherein the first stationary phase comprises one of foregoing materials (A) or (B).Type: GrantFiled: June 1, 2012Date of Patent: April 30, 2019Assignee: Dow Global Technologies LLCInventors: Rongjuan Cong, Charles M. Cheatham, Al Parrott, Wallace W. Yau, Lonnie G. Hazlitt, Zhe Zhou, Alexander W. Degroot, Matthew D. Miller
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Publication number: 20190049416Abstract: A method increase of the Resolution Index (Rl) of a chromatogram generated from a polymer sample comprising at least two olefin-based polymers of different microstructures and/or at least two olefin-based polymer fractions of different microstructures. The method comprises separating the mixture on a low-porosity stationary phase and repeatedly cycling the sample-stationary phase through a series of cooling and heating stages with active eluent flow only during the cooling stages and during the last heating stage to elute the separated analytes off the column.Type: ApplicationFiled: August 30, 2016Publication date: February 14, 2019Applicants: Dow Global Technologies LLC, Dow Global Technologies LLCInventors: Rongjuan Cong, Albert Parrott, Cherry Hollis
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Patent number: 10155861Abstract: A composition includes (A) 30-95 wt % of a random or homogeneous propylene-based interpolymer having: (i) a comonomer content of at least one of C2 and C4-10 ?-olefins of 7 wt % to 49 wt % based on the total weight of the propylene-based interpolymer, (ii) a density of 0.90 g/cc or less, and (iii) an MFR of 1 g/10 min or greater (230° C./2.16 kg); and (B) 5-70 wt % of a block composite nucleator comprising: (1) a first polymer that includes polypropylene; (2) a second polymer that includes an alpha-olefin based polymer, the alpha-olefin being selected from at least one of a C2 and C4-10 ?-olefins, and (3) a block copolymer having a first segment and a second segment, the first segment of the block copolymer having the same composition as the first polymer in the block composite nucleator and the second segment of the block copolymer having the same composition as the second polymer of the block composite nucleator.Type: GrantFiled: August 20, 2015Date of Patent: December 18, 2018Assignee: Dow Global Technologies LLCInventors: Yi Jin, Kim L. Walton, Morgan M. Hughes, Thomas W. Karjala, Lamy J. Chopin, III, Dean Lee, Rongjuan Cong
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Patent number: 10155889Abstract: A hot melt adhesive (HMA) composition includes (A) from 1-60 wt % of a block composite compatibilizer comprising (i) a hard polymer that includes propylene, (ii) a soft polymer that includes ethylene, and (iii) a block copolymer having a soft block and a hard block, the hard block of the block copolymer having the same composition as the hard polymer of the block composite compatibilizer and the soft block of the block copolymer having the same composition as the soft polymer of the block composite compatibilizer; (B) from 1-70 wt % of a tackifier; (C) from 1-40 wt % of at least one selected from the group of a wax and an oil; and (D) Optionally, from greater than zero to 97 wt % of a polymer component that includes an ethylene-based polymer and/or a propylene-based polymer.Type: GrantFiled: August 20, 2015Date of Patent: December 18, 2018Assignee: Dow Global Technologies LLCInventors: Yi Jin, Kim L. Walton, Gary R. Marchand, Selim Yalvac, Allan Walter Mclennaghan, Burcak Conley, Dean Lee, Rongjuan Cong, Colin Li Pi Shan
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Publication number: 20180172648Abstract: A temperature gradient chromatography, and apparatus for the same, said method comprising the following: a) dissolving a composition comprising at least one polymer in at least one solvent, to form a polymer solution; b) injecting at least a portion of the polymer solution onto a support material and wherein the support material has a CI from 0.70 to 1.50; c) cooling the support material at a rate greater than, or equal to, 0.2° C./min; d) increasing the temperature of the support material to elute at least some of the polymer; e) generating the chromatogram.Type: ApplicationFiled: August 24, 2016Publication date: June 21, 2018Inventors: Rongjuan Cong, Albert Parrott, Cherry Hollis, Charles Michael Cheatham
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Patent number: 9902791Abstract: The invention provides compositions, each comprising an ethylene/alpha-olefin interpolymer, which has a reduced level of a low density, low molecular weight oligomeric fraction, as indicated by an HCC value, as described herein, and reduced levels of inorganic content or lower Tm. The invention also provides processes for forming such interpolymers.Type: GrantFiled: June 7, 2017Date of Patent: February 27, 2018Assignee: Dow Global Technologies LLCInventors: Frank J. Cerk, Rongjuan Cong, Shrikant Dhodapkar, Selim Yalvac, Morgan M. Hughes, Timothy W. Gambrel, Yi Jin
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Publication number: 20180022845Abstract: The invention provides compositions, each comprising an ethylene/alpha-olefin interpolymer, which has a reduced level of a low density, low molecular weight oligomeric fraction, as indicated by an HCC value, as described herein, and reduced levels of inorganic content or lower Tm. The invention also provides processes for forming such interpolymers.Type: ApplicationFiled: October 2, 2017Publication date: January 25, 2018Inventors: Frank J. Cerk, Rongjuan Cong, Shrikant Dhodapkar, Selim Yalvac, Morgan M. Hughes, Timothy W. Gambrel, Yi Jin
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Publication number: 20170267797Abstract: The invention provides compositions, each comprising an ethylene/alpha-olefin interpolymer, which has a reduced level of a low density, low molecular weight oligomeric fraction, as indicated by an HCC value, as described herein, and reduced levels of inorganic content or lower Tm. The invention also provides processes for forming such interpolymers.Type: ApplicationFiled: June 7, 2017Publication date: September 21, 2017Inventors: Frank J. Cerk, Rongjuan Cong, Shrikant Dhodapkar, Selim Yalvac, Morgan M. Hughes, Timothy W. Gambrel, Yi Jin
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Publication number: 20170240735Abstract: A composition includes (A) 30-95 wt % of a random or homogeneous propylene-based interpolymer having: (i) a comonomer content of at least one of C2 and C4-10 ?-olefins of 7 wt % to 49 wt % based on the total weight of the propylene-based interpolymer, (ii) a density of 0.90 g/cc or less, and (iii) an MFR of 1 g/10 min or greater (230° C./2.16 kg); and (B) 5-70 wt % of a block composite nucleator comprising: (1) a first polymer that includes polypropylene; (2) a second polymer that includes an alpha-olefin based polymer, the alpha-olefin being selected from at least one of a C2 and C4-10 ?-olefins, and (3) a block copolymer having a first segment and a second segment, the first segment of the block copolymer having the same composition as the first polymer in the block composite nucleator and the second segment of the block copolymer having the same composition as the second polymer of the block composite nucleator.Type: ApplicationFiled: August 20, 2015Publication date: August 24, 2017Inventors: Yi Jin, Kim L. Walton, Morgan M. Hughes, Thomas W. Karjala, Lamy J. Chopin lll, Dean Lee, Rongjuan Cong
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Publication number: 20170240784Abstract: A hot melt adhesive (HMA) composition includes (A) from 1-60 wt % of a block composite compatibilizer comprising (i) a hard polymer that includes propylene, (ii) a soft polymer that includes ethylene, and (iii) a block copolymer having a soft block and a hard block, the hard block of the block copolymer having the same composition as the hard polymer of the block composite compatibilizer and the soft block of the block copolymer having the same composition as the soft polymer of the block composite compatibilizer; (B) from 1-70 wt % of a tackifier; (C) from 1-40 wt % of at least one selected from the group of a wax and an oil; and (D) Optionally, from greater than zero to 97 wt % of a polymer component that includes an ethylene-based polymer and/or a propylene-based polymer.Type: ApplicationFiled: August 20, 2015Publication date: August 24, 2017Inventors: Yi Jin, Kim L. Walton, Gary R. Marchand, Salim Yalvac, Allan Walter Mclennaghan, Burcak Conley, Dean Lee, Rongjuan Cong, Colin LI Pi Shan
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Patent number: 9688795Abstract: The invention provides compositions, each comprising an ethylene/alpha-olefin interpolymer, which has a reduced level of a low density, low molecular weight oligomeric fraction, as indicated by an HCC value, as described herein, and reduced levels of inorganic content or lower Tm. The invention also provides processes for forming such interpolymers.Type: GrantFiled: July 9, 2014Date of Patent: June 27, 2017Assignee: Dow Global Technologies LLCInventors: Frank J. Cerk, Rongjuan Cong, Shrikant Dhodapkar, Selim Yalvac, Morgan M. Hughes, Timothy W. Gambrel, Yi Jin
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Publication number: 20160108157Abstract: The invention provides compositions, each comprising an ethylene/alpha-olefin interpolymer, which has a reduced level of a low density, low molecular weight oligomeric fraction, as indicated by an HCC value, as described herein, and reduced levels of inorganic content or lower Tm. The invention also provides processes for forming such interpolymers.Type: ApplicationFiled: July 9, 2014Publication date: April 21, 2016Inventors: Frank J. Cerk, Rongjuan Cong, Shrikant Dhodapkar, Selim Yalvac, Morgan M. Hughes, Timothy W. Gambrel, Yi Jin
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Patent number: 9095792Abstract: The invention provides methods for chromatography of a polyolefin polymer, comprising introducing a solution of the polyolefin polymer into a liquid flowing through a liquid chromatography stationary phase, the liquid chromatography stationary phase comprising graphitic carbon. The invention also provides an apparatus for polyolefin polymer chromatography, comprising a liquid chromatography stationary phase, the liquid chromatography stationary phase comprising graphitic carbon and at least one inert filler.Type: GrantFiled: December 21, 2010Date of Patent: August 4, 2015Assignee: Dow Global Technologies LLCInventors: William L. Winniford, Rongjuan Cong, Theodore M. Stokich, Jr., Randy J. Pell, Matthew D. Miller, Abhishek Roy, Freddy Van Damme, Alexander W. Degroot, John W. Lyons, David M. Meunier
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Patent number: 8835567Abstract: The instant invention is a sealant composition, method of producing the same, articles made therefrom, and method for forming such articles. The sealant composition according to the present invention comprises: (a) from 70 to 99.5 percent by weight of an ethylene/?-olefin interpolymer composition, based on the total weight of the sealant composition, wherein said ethylene/?-olefin interpolymer composition comprises an ethylene/?-olefin interpolymer, wherein ethylene/?-olefin interpolymer has a Comonomer Distribution Constant (CDC) in the range of from 15 to 250, and a density in the range of from 0.875 to 0.963 g/cm3, a melt index (I2) in a range of from 0.2 to 20 g/10 minutes, and long chain branching frequency in the range of from 0.02 to 3 long chain branches (LCB) per 1000 C; (b) from 0.Type: GrantFiled: October 26, 2011Date of Patent: September 16, 2014Assignee: Dow Global Technologies LLCInventors: Mehmet Demirors, Rongjuan Cong, Cristina Serrat, Gagan Saini, Michael Rutkowske
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Patent number: 8829115Abstract: An ethylene-based polymer composition has been discovered and is characterized by a Comonomer Distribution Constant greater than about 45. The new ethylene-based polymer compositions are useful for making many articles, especially including films. The polymers are made using a metal complex of a polyvalent aryloxyether.Type: GrantFiled: March 2, 2011Date of Patent: September 9, 2014Assignee: Dow Global Technologies LLCInventors: Theresa J. Hermel-Davidock, Mehmet Demirors, Sarah M. Hayne, Rongjuan Cong, Lori L. Kardos, Teresa P. Karjala
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Patent number: 8729200Abstract: The present invention provides an ethylene-based polymer composition characterized by a Comonomer Distribution Constant in the range of from greater than 45 to less than 400, wherein the composition has less than 120 total unsaturation unit/1,000,000C, and method of producing the same.Type: GrantFiled: December 14, 2012Date of Patent: May 20, 2014Assignee: Dow Global Technologies LLCInventors: Theresa J. Hermel-Davidock, Mehmet Demirors, Sarah M. Hayne, Rongjuan Cong
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Publication number: 20140090453Abstract: The invention provides an apparatus for polymer chromatography, comprising at least one column that comprises a first stationary phase comprising one of the following: A) a material comprising at least one non-carbon atom, excluding glass or a metal, selected from molybdenum sulfide MoS2, tungsten sulfide WS2, silicon carbide SiC, boron nitride BN, or combinations thereof, or B) glass, or a metal, or combinations thereof, and a material comprising at least one non-carbon atom selected from molybdenum sulfide MoS2, tungsten sulfide WS2, silicon carbide SiC, boron nitride BN, or combinations thereof. The invention also provides a method for polymer chromatography, comprising introducing a solution, comprising a polymer, into a liquid flowing through a first stationary phase, and wherein the first stationary phase comprises one of foregoing materials (A) or (B).Type: ApplicationFiled: June 1, 2012Publication date: April 3, 2014Applicant: DOW GLOBAL TECHNOLOGIES LLCInventors: Rongjuan Cong, Charles M. Cheatham, Al Parrott, Wallace W. Yau, Lonnie G. Hazlitt, Zhe Zhou, Alexander W. Degroot, Matthew D. Miller