Low Density Patents (Class 526/352.2)
  • Patent number: 11186706
    Abstract: A machine direction oriented film comprising a multimodal copolymer of ethylene and at least two alpha-olefin-comonomers having: a) a density of from 906 to 925 kg/m3 determined according to ISO 1183, b) an MFR21 of 10-200 g/10 min determined according to ISO1133, wherein the multimodal copolymer of ethylene comprises c) a first copolymer of ethylene and a first alpha-olefin comonomer having 4 to 10 carbon atoms; and d) a second copolymer of ethylene having an alpha-olefin comonomer different from the first copolymer, said second alpha-olefin comonomer having 6 to 10 carbon atoms.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: November 30, 2021
    Assignee: Borealis AG
    Inventors: Anh Tuan Tran, Paulo Cavacas, Audrey Gensous
  • Patent number: 10836852
    Abstract: A composition comprising an ethylene-based polymer, wherein the ethylene-based polymer comprises the following properties: a) an Mw(abs) from 130,000 to 162,000 g/mol; b) a melt index (I2) from 1.5 to 3.0 g/10 min; c) an ADF LS from 0.350 to 0.450 for molecular weight ?500,000 g/mol.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: November 17, 2020
    Assignee: Dow Global Technologies LLC
    Inventors: Teresa P. Karjala, Lori L. Kardos, David T. Gillespie, Zachary L. Polk
  • Patent number: 10730973
    Abstract: Ethylene-based polymers comprising the following properties: (A) a density less than 0.9190 g/cc; (B) a hexane extractable level that meets the following equation: hexane extractable level ?A+B [log(12)], where A=2.65 wt %, and B—0.25 wt %[log (dg/min)]; based on total weight of the ethylene-based polymer; (C) a G? (at G?=500 Pa, 1 70° C.) that meets the following equation: G??C+D [log(12)], where C=150 Pa, and D=?60 Pa/[log(dg/min)]; and (D) a melt index (12) from 0.7 to 20 dg/min; are made in high pressure tubular process that comprises at least three reaction zones with the peak polymerization temperature of the first reaction zone ?320° C. and the peak polymerization temperature of the last reaction zone ?290° C.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: August 4, 2020
    Assignee: Dow Global Technologies LLC
    Inventors: Otto J. Berbee, Cornelis F. J. Den Doelder, Stefan Hinrichs, Teresa P. Karjala, John O. Osby
  • Patent number: 10647789
    Abstract: A composition comprising an ethylene-based polymer is made by a process comprising the steps of: (A) contacting under first polymerization conditions at least ethylene and at least one molecular catalyst to form a first ethylene-based polymer, and (B) contacting under second polymerization conditions the first ethylene-based polymer of (A) with at least additional ethylene and a carbon-carbon free radical initiator of Structure (I): wherein R1, R2, R3, R4, R5 and R6 are each, independently, hydrogen or a hydrocarbyl group and wherein, optionally, two or more R groups (R1, R2, R3, R4, R5 and R6) form a ring structure, with the proviso that at least one of R2 and R5, and at least one of R3 and R6 is a hydrocarbyl group of at least two carbon atoms, to form the composition.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: May 12, 2020
    Assignee: Dow Global Technologies LLC
    Inventors: Sean Ewart, Teresa Karjala, Mehmet Demirors, Richard Keaton, Sarat Munjal, Christopher Eddy
  • Patent number: 9790145
    Abstract: This disclosure relates to the production of C2+ olefins from feeds containing methane and at least one co-reactant, to equipment and materials useful in such processes, and to the use of such olefins in, for example, the production of polymers.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: October 17, 2017
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Paul F. Keusenkothen, Juan D. Henao
  • Patent number: 9777083
    Abstract: An ethylene-based polymer, e.g., LDPE, with a low dissipation factor is made by a process comprising the step of contacting at polymerization conditions ethylene and, optionally, one or more comonomers, e.g., an alpha-olefin, with at least one carbon-carbon (C—C) hydrocarbyl, free-radical initiator of Structure 1: wherein R1, R2, R3, R4, R5 and R6, are each, independently, hydrogen or a hydrocarbyl group and wherein, optionally, two or more R groups (R1, R2, R3, R4, R5 and R6) form a ring structure, with the provisos that at least one of R2 and R5, and at least one of R3 and R6 is a hydrocarbyl group of at least two carbon atoms, e.g., an alkaryl of at least seven carbon atoms.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: October 3, 2017
    Assignee: DOW GLOBAL TECHNOLOGIES LLC
    Inventors: Sean W. Ewart, Teresa P. Karjala, Mehmet Demirors, Christopher R. Eddy
  • Patent number: 9637569
    Abstract: The present disclosure relates to a vessel for separating, at a pressure of from 10 MPa to 50 MPa, a composition comprising liquid components and gaseous components into a liquid fraction and a gaseous fraction, wherein the separation vessel has a vertically arranged cylindrical shape, has at its top a manhole, which is surrounded by a thickened by a part of the separation vessel wall; and bears at least one bursting disc which is held by a bursting disc holder which is installed pressure-tight within a boring in the thickened part of the separation vessel wall.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: May 2, 2017
    Assignee: Basell Polyolefine GmbH
    Inventors: Erich Neumann, Danir Khayrullin, Claudio Fibla
  • Patent number: 9029478
    Abstract: A film comprising a polymer blend of: (a) 0.15 to 0.8 wt % of an LDPE having an MI of 0.1 to 0.6 dg/min; and (b) 99.2 to 99.85 wt % of an LLDPE produced with a single-site catalyst comprising a metallocene and having a haze (HZlldpe), dart impact (DIlldpe), MD-Tear (MDTlldpe), and a slice long chain branching index of at least 0.90 for any portion of the composition having a molecular weight of 100,000 or above, wherein the film has a haze (HZblend), a dart impact (DIblend), and an MD-Tear (MDTblend), and HZblend=a*HZlldpe, where a is 0.20 to 0.70; DIblend=b*DIlldpe, where b is 0.9 to 1.3; and MDTblend=c*MDTlldpe, where c is 0.8 to 1.1.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: May 12, 2015
    Assignee: Equistar Chemicals, LP
    Inventor: Harilaos Mavridis
  • Publication number: 20150112039
    Abstract: An ethylene-based polymer, which is a low density polyethylene (LDPE), obtained by free radical polymerization of ethylene, and wherein the LDPE has a GPC parameter “LSP” less than 1.60. An ethylene-based polymer that comprises the following features: a) at least 0.1 amyl groups per 1000 total carbon atoms; b) a melt index of 0.01 to 0.3; c) a z-average molecular weight of Mz (conv.) of greater than 350,000 g/mol and less than 425,000 g/mol; d) a gpcBR value from 1.50 to 2.05, and e) a MWD(conv) [Mw(conv)/Mn(conv)] from 6 to 9. An ethylene-based polymer that comprises the following features: a) at least 0.1 amyl groups per 1000 total carbon atoms; b) a melt viscosity ratio (V0.1/V100), at 190° C., greater than, or equal to, 58; c) a melt viscosity at 0.1 rad/s, 190° C., greater than, or equal to, 40,000 Pa·s, and d) a gpcBR value from 1.50 to 2.25.
    Type: Application
    Filed: December 22, 2014
    Publication date: April 23, 2015
    Inventors: Teresa P. Karjala, Lori L. Kardos, Wallace W. Yau, Jose Ortega, Alfred E. Vigil, JR.
  • Publication number: 20150111053
    Abstract: The present invention relates to a low density polyethylene having a molecular weight distribution Mw/Mn which is 15 or less, a storage modulus G?, measured at a loss modulus G? of 5 kPa, which is above 3000 Pa, a weight average molecular weight (Mw) which is between 192000 and 250000 g/mol and has a melt flow rate (MFR) according to ISO 1133 (190° C., 2.16 kg) which is higher than 3.0 g/10 min, compositions, a process for production of the low density polyethylene, a low density polyethylene which is obtainable by the process, a continuous ethylene polymerization method for introducing vinylidene in a low density polyethylene, a method for an extrusion coating process or a method for an extrusion lamination process, an article, e.g. an extrusion article, an extrusion lamination article, film blowing article, film casting article, wire and cable extrusion article, injection moulding article, blow moulding article or pipe extrusion article, and uses of the low density polyethylene.
    Type: Application
    Filed: December 7, 2012
    Publication date: April 23, 2015
    Inventors: Auli Nummila-Pakarinen, Bernt-Ake Sultan, Bjorn Voigt, Gabriel Ruess, Martin Anker, Mattias Bergqvist, Thomas Gkourmpis, Thomas Hjertberg
  • Publication number: 20150086736
    Abstract: A polyethylene article comprises crystalline polyethylene in an orthorhombic unit cell. The b-axes of the crystalline polyethylene are substantially aligned with the machine direction of the article. In particular, the Herman's index of the b-axes in the machine direction is greater than zero and greater than the Herman's indices of the b-axes in both the transverse and normal directions. The unique physical attributes exhibited by a polyethylene article having this new morphology are also described.
    Type: Application
    Filed: September 22, 2014
    Publication date: March 26, 2015
    Inventors: Darin L. Dotson, Chi-Chun Tsai, Haihu Qin, John W. Miley, Mary Angela Cooley, Sanjeev K. Dey, Eduardo Torres, Francisco Alvarez
  • Patent number: 8969501
    Abstract: A novel LDPE from radical, high pressure polymerization is devised.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: March 3, 2015
    Assignee: Basell Polyolefine GmbH
    Inventors: Gerd Mannebach, Catherine Beuzelin, Christian-Ulrich Schmidt, Thomas Maurer, Jörn Müller, Alexander Wörz, Mike Freudenstein
  • Patent number: 8957158
    Abstract: A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: February 17, 2015
    Assignee: Basell Polyolefine GmbH
    Inventors: Fabiana Fantinel, Gerd Mannebach, Shahram Mihan, Gerhardus Meier, Iakovos Vittorias
  • Publication number: 20150045527
    Abstract: A film suitable for permanent, firm bonding with resin after hardening of the resin is provided with at least one layer containing at least one polyolefin plastomer (POP) or one polyolefin elastomer (POE) capable of bringing about a permanent, direct adhesion of the resin to this layer during the course of resin hardening. The invention likewise refers to an arrangement with at least one such film and a resin on one side of the film. The invention also refers to a tube liner for non-disruptive sewage pipe renovation and various applications of the film according to the invention or the arrangement according to the invention in non-disruptive sewage pipe renovation.
    Type: Application
    Filed: August 11, 2014
    Publication date: February 12, 2015
    Inventors: Franz Schleicher, Abdel-Kader Boutrid, Kurt Stark
  • Patent number: 8933175
    Abstract: A composition comprising a polyethylene wherein the composition is enriched in polymer molecules having topological variations by an enrichment factor ? and wherein the composition displays a long chain branching frequency of greater than about 0.5 long chain branches per 1000 total carbon atoms. A composition comprising an isolated Ziegler-catalyzed polyethylene having a long chain branching frequency of greater than about 0.5 long chain branches per 1000 total carbon atoms at the high molecular weight end.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: January 13, 2015
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Youlu Yu, Chung C. Tso, David C. Rohlfing, Paul J. Deslauriers, Melvin Hildebrand, Max P. McDaniel, Qing Yang
  • Publication number: 20150011702
    Abstract: The invention relates to linear low density polyethylene having a density in the range from about 900 kg/m3 to less than about 940 kg/m3 as determined using IS01872-2, having a molecular weight distribution (Mw/Mn) in the range from 2.5 to 3.5, having an area under the peak in the temperature range from 20 to 40° C. determined using an analytical temperature rising elution fractionation analysis using 1,2-dichlorobenzene and a heating rate of 1° C./min, wherein the area is in the range from 5 to 20% of the sum of the areas under all peaks determined with the analytical temperature rising elution fractionation analysis.
    Type: Application
    Filed: December 20, 2012
    Publication date: January 8, 2015
    Applicant: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Bart Albertus Hubertus van den Esschert, Maria Johanna Willems, Abdulaziz Hamad Al-Humydi, Yahya Banat, Said Fellahi
  • Patent number: 8921498
    Abstract: Processes and systems for the production for pressure management of a polymerization product flowing from a loop polymerization reactor to a separation vessel in a slurry polymerization system are disclosed herein. For example, a process comprises withdrawing the polymerization product from a loop polymerization reactor, and conveying the withdrawn polymerization product to a separation vessel via a first pressure differential and a second pressure differential. The withdrawn polymerization product may flow through the first pressure differential before flowing through the second pressure differential, and the first pressure differential may be less than the second pressure differential.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: December 30, 2014
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Scott E. Kufeld, Bruce E. Kreischer, John D. Hottovy
  • Patent number: 8916667
    Abstract: An ethylene-based polymer, which is a low density polyethylene (LDPE), obtained by free radical polymerization of ethylene, and wherein the LDPE has a GPC parameter “LSP” less than 1.60. An ethylene-based polymer that comprises the following features: a) at least 0.1 amyl groups per 1000 total carbon atoms; b) a melt index of 0.01 to 0.3; c) a z-average molecular weight of Mz (conv.) of greater than 350,000 g/mol and less than 425,000 g/mol; d) a gpcBR value from 1.50 to 2.05, and e) a MWD(conv) [Mw(conv)/Mn(conv)] from 6 to 9. An ethylene-based polymer that comprises the following features: a) at least 0.1 amyl groups per 1000 total carbon atoms; b) a melt viscosity ratio (V0.1/V100), at 190° C., greater than, or equal to, 58; c) a melt viscosity at 0.1 rad/s, 190° C., greater than, or equal to, 40,000 Pa·s, and d) a gpcBR value from 1.50 to 2.25.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: December 23, 2014
    Assignee: Dow Global Technologies LLC
    Inventors: Teresa P. Karjala, Lori L. Kardos, Wallace W. Yau, Jose Ortega, Alfred E. Vigil, Jr.
  • Publication number: 20140367885
    Abstract: Methods of incrementally stretching thermoplastic films in the machine direction include elongating the films in the machine direction without reducing the films' machine-direction tear resistance. In one or more implementations, methods of incrementally stretching thermoplastic films include reducing the gauge of the films without reducing the films' machine-direction tear resistance. The methods can involve cold stretching the films and imparting transverse-direction extending linear rib pattern into the film. The linear ribs can have alternating thick and thin gauges. Incrementally stretched thermoplastic films can have a machine-direction tear resistance that is approximately equal to or greater than the machine-direction tear resistance of the film prior to stretching.
    Type: Application
    Filed: August 27, 2014
    Publication date: December 18, 2014
    Inventor: Michael G. Borchardt
  • Patent number: 8912297
    Abstract: The present disclosure provides a process for producing low density polyethylene with a dissipation factor less than or equal to 1.48×10?4 radian at 2.47 GHz. The process includes free radical high pressure polymerization of ethylene and separation of the unreacted species from the resultant polyethylene to form a recycle stream. The process further includes purging dissipative components from the recycle stream. The purged recycle stream is then introduced into the polymerization reactor.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: December 16, 2014
    Assignee: Dow Global Technologies LLC
    Inventors: Anny Flory, Michael L. Smith, Chester J. Kmiec, Robert F. Eaton, Alfred E. Vigil
  • Publication number: 20140364577
    Abstract: Solid-state shear pulverization of semi-crystalline polymers and copolymers thereof and related methods for enhanced crystallization kinetics and physical/mechanical properties.
    Type: Application
    Filed: May 16, 2014
    Publication date: December 11, 2014
    Inventors: John M. Torkelson, Cynthia Pierre, Amanda Flores
  • Publication number: 20140357826
    Abstract: Methods of stretching thermoplastic films in the machine direction include elongating the films in the machine direction without significantly reducing the films' machine-direction tear resistance. In one or more implementations, methods of stretching thermoplastic films include reducing the gauge of the films while substantially maintaining the films' machine-direction tear resistance. The methods can involve uniformly cold stretching the films by stretching the films to a draw of about one hundred and eighty percent, or less, of the films' original length.
    Type: Application
    Filed: August 15, 2014
    Publication date: December 4, 2014
    Inventors: Michael G. Borchardt, Robert T. Dorsey, Shaun T. Broering
  • Publication number: 20140342141
    Abstract: Disclosed herein are ethylene-based polymers having low densities and narrow molecular weight distributions, but high melt strengths for blown film processing. Such polymers can be produced by peroxide-treating a metallocene-catalyzed resin.
    Type: Application
    Filed: May 14, 2013
    Publication date: November 20, 2014
    Inventors: Lili Cui, Ashish M. Sukhadia, Vivek Rohatgi
  • Patent number: 8883940
    Abstract: Processes and systems for the production for pressure management of a polymerization product flowing from a loop polymerization reactor to a separation vessel in a slurry polymerization system are disclosed herein. For example, a process comprises withdrawing the polymerization product from a loop polymerization reactor, and conveying the withdrawn polymerization product to a separation vessel via a first pressure differential and a second pressure differential. The withdrawn polymerization product may flow through the first pressure differential before flowing through the second pressure differential, and the first pressure differential may be less than the second pressure differential.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: November 11, 2014
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Scott E. Kufeld, Bruce E. Kreischer, John D. Hottovy
  • Patent number: 8871887
    Abstract: The invention provides a composition comprising a low density polyethylene (LDPE) obtained by free radical polymerization of ethylene, and wherein the LDPE has a GPC-Viscometer parameter “DPP” less than 1.3. The invention also provides a composition comprising an ethylene-based polymer that comprises the following features: a) at least 0.1 amyl groups per 1000 total carbon atoms; b) a melt index from 0.5 to 0.9 c) a MWD(conv) [(Mw(conv)/Mn(conv))] from 9 to 13. The invention also provides a composition comprising an ethylene-based polymer that comprises the following features: a) at least 0.1 amyl groups per 1000 total carbon atoms; b) a MWD(conv) from 9 to 13; c) a gpcBR value from 2.0 to 5.0; and d) a melt strength (MS) greater than 20 cN.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: October 28, 2014
    Assignee: Dow Global Technologies LLC
    Inventors: Teresa P. Karjala, Lori L. Kardos, Wallace W. Yau, Jose Ortega
  • Patent number: 8871886
    Abstract: A process for making a low density polymer in a polymerization reactor system, the process comprising polymerizing an olefin monomer, and optionally an olefin comonomer, in the presence of a diluent in a polymerization reactor to make a polymerization product slurry consisting of a liquid phase and a solid phase, wherein the solid phase comprises an olefin polymer having a density of between about 0.905 g/cm3 to about 0.945 g/cm3; and discharging the polymerization product slurry from the polymerization reactor through a continuous take-off valve to make a mixture further comprising a vapor phase. The mixture comprises a pressure less than a bubble point pressure of a component in the polymerization product slurry.
    Type: Grant
    Filed: May 3, 2013
    Date of Patent: October 28, 2014
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: John D. Hottovy, Scott E. Kufeld
  • Publication number: 20140316096
    Abstract: The invention provides an ethylene-based polymer comprising the following properties: A) a “weight fraction (w) of molecular weight greater than 106 g/mole, based on the total weight of polymer, and as determined by GPC(abs),” that meets the following relationship: w<A+B(I2), where A=0.090, and B=?4.00×10-3 (min/dg); B) a G? value that meets the following relationship: G?<C+D log(I2), where C=162 Pa, and D=?90.0 Pa/log (dg/min); C) a melt index (I2) from 1 to 20 dg/min; and D) chloroform extractable that has a maximum Mw(conv) of less than, or equal to, 4,000 g/mole.
    Type: Application
    Filed: November 20, 2012
    Publication date: October 23, 2014
    Applicant: Dow Global Technologies LLC
    Inventors: Otto J. Berbee, Teresa P. Karjala, Cornelis F. den Doelder, Stefan Hinrichs
  • Publication number: 20140316094
    Abstract: The invention provides an ethylene-based polymer comprising the following properties: a) a melt index (12)>2.0 dg/min; b) a Mw(abs) versus 12 relationship: Mw(abs)<A+B(I2), where A=2.40×105 g/mole, and B=?8.00×103 (g/mole)/(dg/min); and c) a G? versus 12 relationship: G?>C+D(I2), where C=127.5 Pa, and D=?1.25 Pa/(dg/min). The invention also provides an ethylene-based polymer comprising the following properties: a) a melt index (12)>2.0 dg/min; b) a G? versus 12 relationship: G?>C+D(I2), where C=127.5 Pa, and D=?1.25 Pa/(dg/min) c) a chloroform extractable (Clext) versus G? relationship: Clext.<E+FG?, where E=0.20 wt %, and F=0.060 wt %/Pa; and d) a “weight fraction (w) of molecular weight greater than 106 g/mole, based on the total weight of polymer, and as determined by GPC(abs),” that meets the following relationship: w<I?J(I2), where I=0.080, and J=?4.00×10?3 min/dg.
    Type: Application
    Filed: November 9, 2012
    Publication date: October 23, 2014
    Applicant: Dow Global Technologies LLC
    Inventors: Otto J. Berbee, Cornelis F. den Doelder, Stefan Hinrichs, Teresa P. Karjala
  • Publication number: 20140303309
    Abstract: A high pressure polymerization process to form an ethylene-based polymer comprises the steps of: A. Injecting a first feed comprising ethylene and optionally a chain transfer agent system (CTA system) into a first autoclave reactor zone operating at polymerization conditions to produce a first zone reaction product, the CTA system of the first reactor zone having a transfer activity Z1; and B. (1) Transferring at least part of the first zone reaction product to a second reactor zone selected from a second autoclave reactor zone or a tubular reactor zone and operating at polymerization conditions, and, optionally, (2) freshly injecting a second feed into the second reactor zone to produce a second zone reaction product, with the proviso that the second reactor zone contains a CTA system having a transfer activity Z2; and with the proviso that the ratio of Z1/Z2 is less than 1.
    Type: Application
    Filed: April 28, 2014
    Publication date: October 9, 2014
    Applicant: Dow Global Technologies LLC
    Inventors: Otto J. Berbee, Cornelis Den Doelder, Egbert Nijhof, Mehmet Demirors, Sjoerd A. De Vries
  • Publication number: 20140288258
    Abstract: The invention relates to A process for the polymerisation of ethylene to produce a polyethylene resin in at least two slurry loop reactors connected to each other in series, the resin having a bimodal molecular weight distribution, a molecular weight distribution MWD of at least 7.0, an HLMI of from 1 to 100 g/10 min, and a density of from 0.935 to 0.960 g/cm3, wherein in one reactor 30 to 47 wt % based on the total weight of the polyethylene resin of a high molecular weight (HMW) polyethylene fraction is produced having an HL275 of from 0.05 to 1.8 g/10 min (the equivalent of HLMI of from 0.01 to 1.56 g/10 min), a density of from 0.925 to 0.942 g/cm3 and an MWD of at least 5.0, and in the other reactor a low molecular weight (LMW) polyethylene fraction is produced having an HLMI of from 10 to 1500 g/10 min and a density of from 0.960 to 0.975 g/cm3, in the presence of a Ziegler-Natta catalyst system.
    Type: Application
    Filed: June 9, 2014
    Publication date: September 25, 2014
    Inventors: Aurélien Vantomme, Daniel Siraux, Alain Van Sinoy, Jean-Léon Gielens
  • Publication number: 20140275455
    Abstract: The invention relates to a metallocene complex according to the following formula (1) wherein R1 and R2 are the same or different and are a substituted or unsubstituted, linear or branched, hydrocarbyl group comprising 1 to 30 carbon atoms; M is titanium, zirconium, or hafnium and X1 and X2 are the same and are halogen or a hydrocarbyl group comprising 1 to 20 carbon atoms.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 18, 2014
    Applicant: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Haif AL-SHAMMARI, Jason MORTON, Douglas STEPHAN
  • Publication number: 20140275427
    Abstract: The present invention relates to a low density polyethylene having a molecular weight distribution Mw/Mn which is greater than 15, a storage modulus G? (5 kPa) which is above 3000 and a vinylidene content which is at least 15/100k C, compositions, a process for production of the low density polyethylene, a continuous ethylene polymerization method for introducing vinylidene in a low density polyethylene, a method for an extrusion coating process, an article, e.g. an extrusion article, and use in extrusion coating.
    Type: Application
    Filed: December 7, 2012
    Publication date: September 18, 2014
    Applicant: BOREALIS AG
    Inventors: Auli Nummila-Pakarinen, Bernt-Ake Sultan, Bjorn Voigt, Martin Anker, Mattias Bergqvist, Thomas Gkourmpis, Thomas Hjertberg
  • Patent number: 8829137
    Abstract: Polyethylene films having a good balance of optical and mechanical properties are disclosed. The films are derived from ethylene copolymer compositions made with a suitably substituted phosphinimine catalyst. The ethylene copolymers have very narrow molecular weight distributions and broadened comonomer distributions.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: September 9, 2014
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Patrick Lam, Victoria Ker, Charles Ashton Garret Carter, Benjamin Milton Shaw, Cliff Robert Baar, Alexei Kazakov, Ian Douglas McKay, Dusan Jeremic
  • Patent number: 8809465
    Abstract: The present invention relates to resin pellets which comprises a thermoplastic resin (A) and an oxidation catalyst (B) which is not supported by any carrier, wherein if the peak area in the vicinity of 1715 cm?1 is defined to be Ic and the peak area observed in the vicinity of 1470 cm?1 is defined to be Im in the IR spectroscopic measurement of the pellets, the ratio: Ic/Im observed for the surface of the pellet is greater than that observed for the interior thereof. The pellets are thermoplastic resin pellets excellent in the oxygen-absorbing capacity and accordingly, they can suitably used as pellets for molding an oxygen absorptive resin article.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: August 19, 2014
    Assignee: Toyo Seikan Kaisha, Ltd
    Inventors: Ikuo Komatsu, Yoshiko Narikawa, Yuji Yamaguchi, Hiroaki Goto
  • Publication number: 20140220280
    Abstract: The present disclosure relates to a process for recycling of plastic waste comprising: segregating plastic waste collected from various sources followed by cleaning of the segregated plastic waste to obtain segregated cleaned waste; grinding of the segregated cleaned waste to obtain grinded waste; introducing the grinded waste into an extrusion line having a venting extruder component as part of the extrusion line, to obtain molten plastic; and removing the impurities by vacuum venting of the molten plastic to obtained recycled plastic free from impurities. The present disclosure further relates to various articles like Industrial Post Recycled (IPR) plastic tubes, blow moulded bottles, pallates, manufactured from the recycled plastic waste.
    Type: Application
    Filed: June 19, 2012
    Publication date: August 7, 2014
    Applicant: ESSEL PROPACK LTD.
    Inventors: Natarasan Sethu, Chandrashekhar Ramchandra Abhyankan, Mrinal Kanti Banerjee
  • Publication number: 20140205823
    Abstract: 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: Application
    Filed: August 26, 2011
    Publication date: July 24, 2014
    Applicant: Dow Global Technologies LLC
    Inventors: Xiao Bing Yun, Rangjuan Cong, Jephrey Pan, Teresa P. Karjala
  • Patent number: 8772411
    Abstract: Disclosed is a polyolefin-based adhesive. The adhesive comprises a maleated polyolefin. The maleated polyolefin is let-down in a linear low density polyethylene (LLDPE). The let-down LLDPE is selected from those which have a melt index MI2 within the range of 0.1 dg/min to 5 dg/min, preferably from 1 dg/min to 3 dg/min, and comprises a TREF soluble fraction having an intrinsic viscosity less than 0.9 dl/g. The adhesive composition can be used in multilayer polyolefin films and multilayer pipes.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: July 8, 2014
    Assignee: Equistar Chemicals, LP
    Inventors: Chun D. Lee, Charles S. Holland, Maged G. Botros
  • Publication number: 20140187730
    Abstract: The present disclosure provides a process for producing low density polyethylene with a dissipation factor less than or equal to 1.48×10?4 radian at 2.47 GHz. The process includes free radical high pressure polymerization of ethylene and separation of the unreacted species from the resultant polyethylene to form a recycle stream. The process further includes purging dissipative components from the recycle stream. The purged recycle stream is then introduced into the polymerization reactor.
    Type: Application
    Filed: March 8, 2012
    Publication date: July 3, 2014
    Inventors: Anny Flory, Michael L. Smith, Chester J. Kmiec, Robert F. Eaton, Alfred E. Vigil
  • Patent number: 8765874
    Abstract: Provided are ethylene-based polymer compositions, articles made therefrom, and methods of making the same. Ethylene-based polymer compositions include blends of a linear low density polyethylene prepared with metallocene catalyst and a low density polyethylene. The linear low density polyethylene may optionally have about five mole percent or less of monomer units derived from an alpha-olefin comonomer. Articles composed of such ethylene-based polymer compositions, such as blown films, exhibit favorable physical properties, including excellent optical properties and retained strength i.e., mitigation of expected decline in physical strength due to LDPE addition.
    Type: Grant
    Filed: January 28, 2008
    Date of Patent: July 1, 2014
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Alan M. Malakoff, Danny Van Hoyweghen, Hitesh A. Fruitwala
  • Patent number: 8722807
    Abstract: The application relates to a polyethylene composition having a base resin, the base resin comprising (A) a first polyethylene fraction, and (B) a second polyethylene fraction, wherein the melt flow rate MFR5/190° c. of the first fraction is higher than the melt flow rate MFR5/190° c. of the second fraction, the flow rate ratio FRR21/5 of the polyethylene composition, defined as the ratio of melt flow rate MFR21-6/190° c. to melt flow rate MFR5/190° c., is within the range of 15-28, and 10 the melt flow rate MFR5/190° c. of the polyethylene composition is within the range of 0.5-1.1 g/10 min.
    Type: Grant
    Filed: November 2, 2005
    Date of Patent: May 13, 2014
    Assignee: Borealis Technology Oy
    Inventors: Mats Bäckman, James McGoldrick, Bo Hovgard, Siegfried Liedauer, David Walton
  • Publication number: 20140094583
    Abstract: An ethylene-based polymer, which is a low density polyethylene (LDPE), obtained by free radical polymerization of ethylene, and wherein the LDPE has a GPC parameter “LSP” less than 1.60. An ethylene-based polymer that comprises the following features: a) at least 0.1 amyl groups per 1000 total carbon atoms; b) a melt index of 0.01 to 0.3; c) a z-average molecular weight of Mz (cony.) of greater than 350,000 g/mol and less than 425,000 g/mol; d) a gpcBR value from 1.50 to 2.05, and e) a MWD(conv) [Mw(conv)/Mn(conv)] from 6 to 9. An ethylene-based polymer that comprises the following features: a) at least 0.1 amyl groups per 1000 total carbon atoms; b) a melt viscosity ratio (V0.1/V100), at 190° C., greater than, or equal to, 58; c) a melt viscosity at 0.1 rad/s, 190° C., greater than, or equal to, 40,000 Pa·s, and d) a gpcBR value from 1.50 to 2.25.
    Type: Application
    Filed: March 13, 2013
    Publication date: April 3, 2014
    Applicant: Dow Global Technologies LLC
    Inventor: Dow Global Technologies LLC
  • Publication number: 20140094533
    Abstract: The invention provides a composition comprising a low density polyethylene (LDPE) obtained by free radical polymerization of ethylene, and wherein the LDPE has a GPC-Viscometer parameter “DPP” less than 1.3. The invention also provides a composition comprising an ethylene-based polymer that comprises the following features: a) at least 0.1 amyl groups per 1000 total carbon atoms; b) a melt index from 0.5 to 0.9 c) a MWD(conv) [Mw(conv)/Mn(conv))] from 9 to 13; The invention also provides a composition comprising an ethylene-based polymer that comprises the following features: a) at least 0.1 amyl groups per 1000 total carbon atoms; b) a MWD(conv) from 9 to 13; c) a gpcBR value from 2.0 to 5.0; d) a melt strength (MS) greater than 20 cN.
    Type: Application
    Filed: March 7, 2013
    Publication date: April 3, 2014
    Applicant: Dow Global Technologies LLC
    Inventors: Teresa P. Karjala, Lori L. Kardos, Wallace W. Yau, Jose Ortega
  • Publication number: 20140031508
    Abstract: Solid-state shear pulverization of semi-crystalline polymers and copolymers thereof and related methods for enhanced crystallization kinetics and physical/mechanical properties.
    Type: Application
    Filed: April 1, 2013
    Publication date: January 30, 2014
    Applicant: Northwestern University
    Inventors: John M. Torkelson, Cynthia Pierre, Amanda Flores
  • Publication number: 20130324690
    Abstract: The present invention provides dual catalyst systems containing a metallocene catalyst and a hydrogen scavenging catalyst, and polymerization processes employing these dual catalyst systems. Due to a reduction in hydrogen levels in the polymerization processes, olefin polymers produced from these polymerization processes may have a higher molecular weight, a lower melt index, and higher levels of unsaturation.
    Type: Application
    Filed: June 26, 2013
    Publication date: December 5, 2013
    Inventors: Rex E. Murray, William B. Beaulieu, Qing Yang, Errun Ding, Gary L. Glass, Alan L. Solenberger, Steve J. Secora
  • Publication number: 20130266786
    Abstract: Polymer compositions including an ethylene-based polymer having a melt index of from about 0.1 g/10 min to about 5.0 g/10 min; a melt index ratio of from about 15 to about 30; a weight average molecular weight (Mw) of from about 20,000 to about 200,000; a molecular weight distribution (Mw/Mn) of from about 2.0 to about 4.5; and a density of from 0.900 to 0.920 g/cm3. Films having a thickness of 1 mil show a difference between the maximum seal strength and the minimum seal strength over the ranges of temperatures between 95.0° C. and 140.0° C. of ?1.00×102 grams/cm.
    Type: Application
    Filed: March 12, 2013
    Publication date: October 10, 2013
    Applicant: ExxonMobil Chemical Patents Inc.
    Inventors: Alan M. Malakoff, Richard W. Halle, Adriana S. Silva, Steve A. Best
  • Publication number: 20130261264
    Abstract: Provided are blends of branched hydrocarbon comb polymers having tailored branching and molecular weight parameters, with substantially linear polymers. Such blends have been found to have improved extensional rheological properties, while maintaining nearly the viscosity of the substantially linear polymers. The blends of the hydrocarbon comb polymers with the substantially linear polymers thus maintain the extrusion processing characteristics of the linear polymer alone, but have improved extensional flow processability, with strain hardening ratios (SHR) greater than 1. The blends are effective in blown film processing. Also disclosed are related methods for improving extensional flow processability using the branched hydrocarbon comb polymers, as well as the branched hydrocarbon comb polymers themselves, including as a property enhancing additive for such substantially linear polymers.
    Type: Application
    Filed: April 2, 2013
    Publication date: October 3, 2013
    Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Johannes Mattieu Soulages, David John Lohse, Andy Haishung Tsou, Thomas Sun, Pamela Jean Wright, Nikos Hadjichristidis, Pradeep Pandurang Shirodkar
  • Publication number: 20130261265
    Abstract: The invention provides an ethylene-based polymer comprising the following properties: A) a MWDconv from 7 to 10; and B) a “normalized LSF” greater than, or equal to, 9.5.
    Type: Application
    Filed: December 2, 2011
    Publication date: October 3, 2013
    Applicant: Dow Global Technologirs LLC
    Inventors: Teresa P. Karjala, Lori L. Kardos, Wallace W. Yau, Jose Ortega
  • Patent number: 8461280
    Abstract: A multimodal linear low density polyethylene polymer having a final density of 900 to 940 kg/m3, and containing at least one ?-olefin comonomer in addition to ethylene comprising: (A) 30 to 60 wt % of a lower molecular weight component being an ethylene homopolymer or a copolymer of ethylene and at least one ?-olefin; and (B) 70 to 40 wt % of a higher molecular weight component being a copolymer of ethylene and at least one ?-olefin, said ?-olefin being the same or different from any ?-olefin used in component (A) but with the proviso that both components (A) and (B) are not polymers of ethylene and butane alone; wherein the multimodal LLDPE has a dart drop of at least 700 g; and wherein components (A) and (B) are obtainable using a Ziegler-Natta catalyst.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: June 11, 2013
    Assignee: Borealis Technology Oy
    Inventors: Virginie Eriksson, Marjo Vaananen, Markku Vahteri, Thomas Garoff, Petri Rekonen, Jari Hatonen, Siw Bodil Fredriksen, Katrin Nord-Varhaug, Marit Seim, Jorunn Nilsen, Irene Helland
  • Publication number: 20130137839
    Abstract: A polymer having a long chain branching content peaking at greater than about 20 long chain branches per million carbon atoms, and a polydispersity index of greater than about 10 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. A polymer having a long chain branching content peaking at greater than about 8 long chain branches per million carbon atoms, a polydispersity index of greater than about 20 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. A polymer having a long chain branching content peaking at greater than about 1 long chain branches per chain, and a polydispersity index of greater than about 10 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution.
    Type: Application
    Filed: November 30, 2011
    Publication date: May 30, 2013
    Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP
    Inventors: Youlu YU, Eric D. SCHWERDTFEGER, Max P. MCDANIEL, Alan L. SOLENBERGER, Kathy S. COLLINS
  • Patent number: 8415442
    Abstract: Disclosed is an ethylene-based polymer with a density from about 0.90 to about 0.94 in grams per cubic centimeter, with a molecular weight distribution (Mw/Mn) from about 2 to about 30, a melt index (I2) from about 0.1 to about 50 grams per 10 minutes, and further comprising sulfur from about 5 to about 4000 parts per million. The amount of sulfur is also determined based upon the total weight of the ethylene-based polymer. Also disclosed is process for making an ethylene-based polymer which includes the steps of splitting a process fluid for delivery into a tubular reactor; feeding an upstream process feed stream into a first reaction zone and at least one downstream process feed stream into at least one other reaction zone, where the process fluid has an average velocity of at least 10 meters per second; and initiating a free-radical polymerization reaction.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: April 9, 2013
    Assignee: Dow Global Technologies LLC
    Inventors: Teresa P. Karjala, Christopher R. Eddy, Mehmet Demirors, Wallace W. Yau, Sarat Munjal, Stefan Hinrichs, Jian Wang, Otto J. Berbee, Werner Zschoch, Cornelis J. Hosman, Lonnie G. Hazlitt