Adding Catalyst Or Catalyst Component Patents (Class 526/86)
  • Patent number: 11787943
    Abstract: A curable silicone composition is provided. The curable silicone composition is useful for forming a cured product which inhibits the discoloration of silver electrodes or a silver-plated substrate in an optical semiconductor device due to a sulfur-containing gas. The curable silicone composition comprises at least one type of a crown compound. An optical semiconductor device is also provided. The optical semiconductor device has excellent reliability after a sulfur resistance test, in which an optical semiconductor device on silver electrodes or a silver-plated substrate is sealed, covered, or adhered with a cured product of the curable silicone composition.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: October 17, 2023
    Assignee: Dow Silicones Corporation
    Inventors: Hyun-Ji Kang, Ju-Young Yook
  • Patent number: 11708427
    Abstract: Provided are an apparatus and a method for manufacturing high-pressure method low-density polyethylene, the apparatus and the method having excellent characteristics that a chain transfer agent can be supplied by a simpler apparatus, a deviation (variation) of the concentration of the chain transfer agent supplied to a reactor can be reduced, and compression energy of the chain transfer agent can be reduced. An apparatus for manufacturing high-pressure method polyethylene includes a chain transfer agent supply line that is a line connected to a low pressure recycle ethylene supply line for supplying a chain transfer agent.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: July 25, 2023
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Kensuke Naraki, Taiki Sugamura
  • Patent number: 11666729
    Abstract: Methods for bonding polymeric substrates to component parts, and medical devices assemblies including a tubing and a component part bonded together using a solvent containing a tackifier.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: June 6, 2023
    Assignee: Hollister Incorporated
    Inventors: Horacio Montes De Oca Balderas, Eamonn Casey, Claire McKenna, John P. O'Mahony
  • Patent number: 11603489
    Abstract: The present invention relates to a composition for inhibiting water permeation in an extraction well of a hydrocarbon oil from an underground reservoir which comprises injecting into said reservoir at least one polymerizable composition comprising: at least one hydrophilic monomer, at least one hydrophilic initiator of radical polymerization with thermal activation (hydrophilic initiator), at least one lipophilic initiator of radical polymerization with thermal activation (lipophilic initiator). The present invention also relates to the polymerizable compositions that can be used in said method.
    Type: Grant
    Filed: May 3, 2021
    Date of Patent: March 14, 2023
    Assignee: ENI S.P.A.
    Inventors: Lucilla Del Gaudio, Davide Moscatelli, Paola Albonico
  • Patent number: 11384164
    Abstract: Methods and systems for olefin polymerization are provided. The method for olefin polymerization can include flowing a catalyst through an injection nozzle and into a fluidized bed disposed within a reactor. The method can also include flowing a feed comprising one or more monomers, one or more inert fluids, or a combination thereof through the injection nozzle and into the fluidized bed. The feed can be at a temperature greater than ambient temperature. The method can also include contacting one or more olefins with the catalyst within the fluidized bed at conditions sufficient to produce a polyolefin.
    Type: Grant
    Filed: June 8, 2020
    Date of Patent: July 12, 2022
    Assignee: Univation Technologies, LLC
    Inventors: Bruce J. Savatsky, R. Eric Pequeno
  • Patent number: 11110419
    Abstract: A system and method are directed toward the synthesis of polymeric capsules using a phase inversion process by extrusion of polymeric droplets through a syringe-needle assembly or an iris-shutter mechanism. The polymeric solution may be prepared by dissolving PAN (polyacrylonitrile) polymer in DMF (Dimethyl Formamide) solvent at high temperature through continuous stirring. Following preparation of the capsules, further treatment was initiated using triethylamine in gelation bath to make the final product an efficient removal agent of water hardness.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: September 7, 2021
    Assignee: Haier US Appliance Solutions, Inc.
    Inventors: Somak Chatterjee, Sharath Chandra Prasad, Srinivas Pasham, Balaji Srinivasan, Gaurav Kumar Verma, Andrew Reinhard Krause, Gregory Sergeevich Chernov
  • Patent number: 10252235
    Abstract: The feed rate of a supported particulate catalyst through a unit body rotary disc catalyst feeder may be controlled by controlling the feed of nitrogen to the upper surface of the rotary disc.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: April 9, 2019
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Victoria Ker, Richard Paul Kong-Labrie
  • Patent number: 9845368
    Abstract: A first embodiment which is a bimodal polymer having a weight fraction of a lower molecular weight (LMW) component ranging from about 0.25 to about 0.45, a weight fraction of a higher molecular weight (HMW) component ranging from about 0.55 to about 0.75 and a density of from about 0.931 g/cc to about 0.955 g/cc which when tested in accordance with ASTM D1003 using a 1 mil test specimen displays a haze characterized by equation: % Haze=2145?2216*FractionLMW?181*a molecular weight distribution of the LMW component (MWDLMW)?932*a molecular weight distribution of the HMW component (MWDHMW)+27*(FractionLMW*MWDLMW)+1019*(FractionLMW*MWDHMW)+73*(MWDLMW*MWDHMW) wherein fraction refers to the weight fraction of the component in the polymer as a whole.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: December 19, 2017
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Guylaine St. Jean, Elizabeth M. Lanier, J. Todd Lanier, Qing Yang, Brooke A. Gill
  • Patent number: 9475892
    Abstract: Process for the continuous transition between two different and compatible polymerization catalysts.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: October 25, 2016
    Assignee: INEOS SALES (UK) LIMITED
    Inventors: Jean-Louis Chamayou, Benoit Sibourd
  • Patent number: 9382405
    Abstract: The present invention relates to peroxide mixtures and in particular to peroxide mixtures that are suitable for the accelerated crosslinking of ethylene vinyl acetate.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: July 5, 2016
    Assignee: UNITED INITIATORS GMBH & CO. KG
    Inventors: Martin Kunz, Katharina Seitz, Iris Nagl
  • Patent number: 9120880
    Abstract: The invention provides a high pressure polymerization process to form an ethylene-based polymer, the process comprising at least the following steps: feeding ethylene to a first reaction zone and to one or more subsequent reaction zones, and wherein for each subsequent reaction zone that receives fresh ethylene, the ratio, Rn (n=reaction zone number, n>1), of “mass fraction of fresh ethylene fed to the first reaction zone (RZ1)” to “mass fraction of fresh ethylene fed to the nth reaction zone (RZn)” is (Rn=RZ1/RZn) greater than 1, or is from 0 to 0.
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: September 1, 2015
    Assignee: Dow Global Technologies LLC
    Inventors: Werner Zschoch, Otto J. Berbee, Cornelis J. Hosman
  • Patent number: 8981020
    Abstract: A method for preparing a functionalized polymer, the method comprising the steps of (a) polymerizing monomer in the presence of a coordination catalyst to form a polymer, (b) inhibiting said step of polymerizing with a Lewis base, and (c) reacting the polymer with a functionalizing agent.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: March 17, 2015
    Assignee: Bridgestone Corporation
    Inventors: Steven Luo, Kevin M. McCauley, Timothy L. Tartamella, Mark W. Smale, Randhir Shetty
  • 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: 8962764
    Abstract: A process for constructing multi-arm star macromolecules with uniform properties, high molecular weight and narrow molecular weight distribution using free radical polymerization is described.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: February 24, 2015
    Assignee: Carnegie Mellon University
    Inventors: Krzysztof Matyjaszewski, Haifeng Gao, James Spanswick
  • Publication number: 20140357814
    Abstract: A procedure for improved temperature control in controlled radical polymerization processes is disclosed. The procedure is directed at controlling the concentration of the persistent radical in ATRP and NMP polymerizations procedures and the concentration of radicals in a RAFT polymerization process by feeding a reducing agent or radical precursor continuously or intermittently to the reaction medium through one of more ports.
    Type: Application
    Filed: August 14, 2014
    Publication date: December 4, 2014
    Inventors: Wojciech Jakubowski, James Spanswick
  • Patent number: 8846829
    Abstract: Techniques are provided for operating a reactor during a catalyst transition period. The instantaneous reaction rate during a catalyst transition period can be determined using real-time measured process variables, and material balance calculations to provide an instantaneous reaction rate in approximately real time. According to certain embodiments, a material balance can be performed on the reactor system using a continuous ideal stirred tank reactor to determine the fractions of each type of catalyst that are present in the reactor, as well as the overall weight percent of catalyst in the reactor. A controller can then calculate the overall instantaneous reaction rate based on the respective catalyst fractions and the overall weight percent of catalyst in the reactor. The catalyst feed rate can then be adjusted based on the determined instantaneous reaction rate to maintain the instantaneous reaction rate within desired limits during a catalyst transition period.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: September 30, 2014
    Assignee: Chevron Phillips Chemical Company LP
    Inventor: Gregory G. Hendrickson
  • Patent number: 8841391
    Abstract: Process for introducing a polymerization catalyst in solid form into a gas-phase fluidized bed using an injection device having an inner tube of internal cross-sectional area of 10-100 mm2 and an outer tube forming an annulus around the inner tube with a cross-sectional area of 1-10 times the internal cross-sectional area of the inner tube. The polymerization catalyst and a carrier gas are passed through the inner tube into the gas-phase fluidized bed at a carrier gas linear velocity of 4-14 m/s and a carrier gas mass flow rate of 10-35 kg/h. A shielding gas is passed through the outer tube and into the gas-phase fluidized bed at a shielding gas linear velocity of 1-10 times the linear velocity of the carrier gas through the inner tube and at a shielding gas mass flow rate of 100-500 kg/h. No cooled recycle process gas is provided to the injection device.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: September 23, 2014
    Assignee: Ineos Sales (UK) Limited
    Inventors: Bruno Bordais, Christopher James Kemp, Jose Andre Laille, Willy Lemesle, Wilhelm Kalz, Loic Perio
  • Patent number: 8816031
    Abstract: The present invention provides a method for preparing a water soluble polymer, which comprises: a first step of polymerizing: (a) 60 to 99.5 mol % of at least one selected from acrylamide and methacrylamide, (b) 0.5 to 20 mol % of at least one selected from ?,?-unsaturated monocarboxylic acid, ?,?-unsaturated dicarboxylic acid and salts thereof, and (c) 1 to 20 mol % of at least one selected from a water soluble cationic monomer and a salt thereof, (d) 0.01 to 1 mol % of a chain transfer agent, and (e) 0.005 to 5 mol % of a crosslinkable monomer, in the presence of a persulfate-based catalyst to obtain a prepolymer; and a second step of further adding the persulfate-based catalyst to the prepolymer obtained in the first step and the residual monomer, followed by the polymerization and termination of the polymerization.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: August 26, 2014
    Assignee: Harima Chemicals, Inc.
    Inventors: Yoshiharu Kimura, Takahiro Fujiwara
  • Patent number: 8710162
    Abstract: Polymerization processes in a bulk loop reactor are described herein. In particular, a method of contacting a flow of metallocene with a flow of propylene is provided. This method includes directing the flow of metallocene towards a junction, directing the flow of propylene towards the junction and maintaining a portion of the flow of metallocene separate from a portion of the flow propylene within a portion of the junction downstream of the flow of propylene into the junction. In another embodiment, a method of introducing a quantity of antifouling agent into a catalyst mixing system is provided. In this embodiment a portion of the antifouling agent is introduced at or downstream of a point of contact of a stream of propylene with a stream of catalyst. The antifouling agent may be a member, alone or in combination with other members, selected from Stadis 450 Conductivity Improver, Synperonic antifouling agent, and Pluronic antifouling agent.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: April 29, 2014
    Assignee: Fina Technology, Inc.
    Inventors: Ronald Tharappel, Renaud Oreins, William Gauthier, David Attoe, Kevin McGovern, Michel Messiaen, David Rauscher, Kai Hortmann, Michel Daumerie
  • Patent number: 8680218
    Abstract: Methods for controlling properties of an olefin polymer using an organozinc compound are disclosed. The HLMI/MI shear ratio of the polymer can be decreased and the Mz/Mw ratio of the polymer can be increased via the addition of the organozinc compound.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: March 25, 2014
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Qing Yang, Max P. McDaniel, Errun Ding, Ted H. Cymbaluk, Tony R. Crain, Gary L. Glass
  • Patent number: 8664342
    Abstract: Process for introducing a solid polymerization catalyst into a gas-phase fluidized bed using an injection device having an inner tube of internal cross-sectional area of 10 to 100 mm2 and an outer tube forming an annulus around the inner tube with a cross-sectional area of 1 to 10 times the internal cross-sectional area of the inner tube. The polymerization catalyst and a carrier gas are passed through the inner tube and into the gas-phase fluidized bed at a carrier gas linear velocity of 4 to 14 m/s and a carrier gas mass flow rate of 10-35 kg/h. A shielding gas is passed through the outer tube and into the gas-phase fluidized bed at a linear velocity of 1 to 10 times the carrier gas linear velocity through the inner tube and at a mass flow rate of 100-500 kg/h. No cooled recycle process gas is provided to the injection device.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: March 4, 2014
    Assignee: Ineos Commercial Services UK Limited
    Inventors: Bruno Bordais, Christohper James Kemp, Jose Andre Laille, Willy Lemesle
  • Patent number: 8623973
    Abstract: Methods for controlling properties of an olefin polymer using a Group VIII transition metal-modified activator-support are disclosed. The melt index of the polymer can be decreased and the molecular weight of the polymer can be increased via the addition of the transition metal-modified activator-support to the polymerization reactor system.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: January 7, 2014
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Max P. McDaniel, Qing Yang, Tony R. Crain, Kathy S. Collins
  • Patent number: 8524649
    Abstract: An aqueous dispersion of a copolymer with copolymerized units a) of at least one ethylenically unsaturated carboxylic acid, b) of at least one nonionic ethylenically unsaturated surfactant monomer, c) of at least one C1-C2-alkyl methacrylate, d) of at least one C2-C4-alkyl acrylate, where the alkyl chain length averaged over the number of alkyl groups of the alkyl acrylate is 2.1 to 4.0, is described. Following neutralization with alkali, the dispersion serves as associative thickener, in particular for liquid detergent and cleaner formulations. The thickeners are characterized by high transparency and high thickening effect coupled with high shear dilution.
    Type: Grant
    Filed: August 1, 2008
    Date of Patent: September 3, 2013
    Assignee: BASF SE
    Inventors: Reinhold J Leyrer, Kati Schmidt
  • Patent number: 8513366
    Abstract: Methods for modulated degenerative transfer living polymerization and isotactic-atactic stereoblock and stereogradient poly(olefins) thereby Abstract A method of producing a multiblock, stereoblock polyolefin having substantially uniform microstructure is disclosed. The method includes contacting a Ziegler-Natta pre-catalyst with a co-catalyst and an olefin to polymerize the olefin and form a first stereoblock, adding a methyl donator that changes the stereoregularity of the polymerization, and polymerizing the olefin to form a second stereoblock. The methods of the present invention allow for the production of poly(olefin)s having predictable degrees of incorporation of stereoerrors of a known type. The methods allows for the production of a variety of poly(olefin) microstructures, ranging from stereoblock to stereogradient poly(olefin)s and poly(olefin)s having fully isotactic to fully atactic microstructures.
    Type: Grant
    Filed: March 17, 2006
    Date of Patent: August 20, 2013
    Assignee: University of Maryland, College Park
    Inventors: Lawrence R. Sita, Matthew B. Harney, Yonghui Zhang
  • Patent number: 8513342
    Abstract: Durable superhydrophobic coating composition having a composition ranging from about 10 to about 80 w.t. % of an acrylic polymer resin, from about 5 to about 40 w.t. % of a polysiloxane oil, from about 1 to about 50 w.t. % of hydrophobic particles, from about 0.1 to about 10 w.t. % metal oxides, and the remainder being one or more solvents and optionally other additives. Methods of making the coating, as well as coated substrates, are also provided.
    Type: Grant
    Filed: October 18, 2010
    Date of Patent: August 20, 2013
    Assignee: University of Pittsburgh—Of the Commonwealth System of Higher Education
    Inventors: Di Gao, Liangliang Cao
  • Patent number: 8481658
    Abstract: A method for transitioning from a Ziegler-Natta to a Phillips catalyst system for the olefin polymerization reaction in one reactor, preferably a gas phase reactor, is described. The method comprises the steps of a) discontinuing a first olefin polymerization reaction performed in the presence of the Ziegler-Natta catalyst system; b) performing a second olefin polymerization reaction in the presence of a further catalyst system comprising catalyst components (A) and (B) producing, respectively, a first and a second polyolefin fraction, wherein the Mw of the first polyolefin fraction is less than the Mw of the second polyolefin fraction and the initial activity of catalyst component (A) exceeds the initial activity of catalyst component (B); and c) performing a third olefin polymerization reaction the presence of the Phillips catalyst system.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: July 9, 2013
    Assignee: Basell Polyolefine GmbH
    Inventors: Gerhardus Meier, Shahram Mihan
  • Patent number: 8410230
    Abstract: Provided are methods of producing polymers with broadened molecular weight and/or composition distribution in a continuous homogeneous polymerization system utilizing reactor temperature gradients, reactor polymer concentration gradients, monomer concentration gradients, catalyst concentration gradients, and combinations thereof in the polymerization reactor. Such methods are particularly suitable when utilizing metallocene catalysts and other single-site catalysts, which generally produce polymers with narrow molecular weight and composition distribution.
    Type: Grant
    Filed: April 18, 2011
    Date of Patent: April 2, 2013
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Gabor Kiss, Robert Patrick Reynolds, Jr., John W. Chu, Patrick Brant, James Richardson Lattner
  • Patent number: 8324329
    Abstract: A method for preparing a functionalized polymer, the method comprising the steps of (a) polymerizing monomer in the presence of a coordination catalyst to form a polymer, (b) inhibiting said step of polymerizing with a Lewis base, and (c) reacting the polymer with a functionalizing agent.
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: December 4, 2012
    Assignee: Bridgestone Corporation
    Inventors: Steven Luo, Kevin M. McCauley, Timothy L. Tartamella, Mark W. Smale, Randhir Shetty
  • Patent number: 8293857
    Abstract: Process for polymerization of ethylene using a catalyst system including (i) a solid catalyst of Ti, Mg and halogen, (ii) a first activator which is at least one trialkylaluminium compound of the formula AlR3, where each R is independently a C2 to C20 alkyl radical, and (iii) a second activator which is at least one alkylaluminium chloride of the formula AlR?2Cl, where each R? is independently a C2 to C20 alkyl radical. The second activator is introduced directly into the polymerization reactor, without precontact with the solid catalyst, continuously or semi-continuously, and at a maximum rate of introduction at any time corresponding to less than 10 ppm by weight of chlorine relative to the rate of polyethylene production.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: October 23, 2012
    Assignee: Ineos Europe Limited
    Inventors: Alain Berardi, Andre Frederich, Dominique Jan, Jean-Jacques Kuhlburger, Anthony Sgard, Alain Van Daele
  • Patent number: 8288468
    Abstract: The invention relates to a process for the preparation of an aqueous hybrid polymer dispersion comprising an auto-oxidatively crosslinkable polymer and an addition polymer. The invention further relates to the aqueous hybrid polymer dispersion obtainable by said process, the use thereof for the manufacture of coating compositions, ink compositions or adhesives and to coating compositions includes the hybrid polymer dispersion as a binder. The process includes a first polymerization step wherein a first hybrid polymer dispersion is formed by addition polymerization of vinyl monomers in the presence of dispersed auto-oxidatively crosslinkable polymer and a second polymerization step wherein secondary polymerization loci are provided in the first hybrid polymer dispersion to polymerise residual vinyl monomer of the first polymerisation step.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: October 16, 2012
    Assignee: Nuplex Resins B.V.
    Inventors: Dirk Emiel Paula Mestach, Wicenty Lambertus Stanislaw Pilaszek
  • Patent number: 8288491
    Abstract: A process for producing high-quality polymer microparticles having uniform particle size of the order of several micrometers to tens of micrometers by inverse suspension polymerization at high productivity while keeping excellent dispersion stability without causing aggregation among particles. The inverse suspension polymerization involves a vinyl monomer and is performed in at least two steps. A water-soluble oxidizing agent and a water-soluble reducing agent are used as a polymerization initiator, and the water-soluble reducing agent is fed after the water-soluble oxidizing agent is fed.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: October 16, 2012
    Assignee: Toagosei Co. Ltd.
    Inventors: Akihiro Gotou, Hideo Matsuzaki, Tomotaka Mizuno
  • Patent number: 8283431
    Abstract: The invention pertains to a process to polymerize one or more monomers wherein at most 90% w/w of a safely useable amount of a first initiator is used and a second initiator is dosed at least after the start of the polymerization, in an amount such that essentially the full cooling capacity of the polymerization reactor is used, resulting in a cost efficient process to make polymers, particularly polymers comprising polymerized vinyl chloride.
    Type: Grant
    Filed: April 27, 2004
    Date of Patent: October 9, 2012
    Assignee: Akzo Nobel NV
    Inventors: Hans Westmijze, Lambertus Meulenbrugge, Koen Antoon Kornelis Vanduffel, Andreas Petrus Van Swieten
  • Patent number: 8273835
    Abstract: Process for the preparation of ethylene homopolymers or copolymers in the presence of free-radical polymerization initiators at from 100° C. to 350° C. and pressures in the range of from 160 MPa to 350 MPa in a tubular reactor with at least two spatially separated initiator injection points, wherein injecting initiator rises the temperature of the reaction mixture in the reaction zone following the injection point, and the first initiator injection point of the tubular reactor is not provided with initiator or is provided with so little initiator that the temperature of the reaction mixture does not rise more than 20° C.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: September 25, 2012
    Assignee: Basell Polyolefine GmbH
    Inventors: Dieter Littmann, Andre-Armand Finette, Hans Joachim Meinke
  • Patent number: 8232356
    Abstract: A method is described for producing an aqueous thickener dispersion from a monomer composition made of at least one ethylenically unsaturated carboxylic acid and at least one ethylenically unsaturated hydrophobic monomer, (i) an at least partially polymerized pre-emulsion being produced from 10 to 80 wt.-% of said monomer composition, and (ii) the residual quantity of said monomer composition being added completely to the at least partially polymerized pre-emulsion and initiating a radical polymerization. The monomer composition preferably also comprises an associative monomer. The method avoids disadvantages of batch polymerization, such as inadequate batch-to-batch reproducibility and safety problems.
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: July 31, 2012
    Assignee: BASF SE
    Inventors: Reinhold J. Leyrer, Kati Schmidt
  • Patent number: 8227559
    Abstract: The invention relates to a process for the preparation of a copolymer by free radical mass polymerization of a maleic acid monoester derivative with vinyl ester in the presence of an acid having a pKa of less than 1.8. The copolymer is suitable as a dispersant for hydraulic binders.
    Type: Grant
    Filed: January 12, 2009
    Date of Patent: July 24, 2012
    Assignee: Construction Research & Technology GmbH
    Inventors: Jochen Mezger, Alexander Kraus, Harald Grassl, Kerstin Becher
  • Patent number: 8217124
    Abstract: Process for the preparation of ethylene homopolymers or copolymers in a high pressure reactor with at least two spatially separated initiator injection points by polymerizing ethylene and optionally further monomers in the presence of at least two different mixtures of free-radical polymerization initiators at from 100° C. to 350° C. and pressures in the range of from 160 MPa to 350 MPa, wherein the process comprises the following steps: a) providing at least two different initiators as solution in a suitable solvent or in liquid state, b) mixing the initiators and optionally additional solvent in at least two static mixers and c) feeding each of the mixtures to a different initiator injection point of the high pressure reactor, and apparatus for feeding initiator mixtures to a high pressure reactor with at least two spatially separated initiator injection points.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: July 10, 2012
    Assignee: Basell Polyolefine GmbH
    Inventors: Dieter Littmann, Andre-Armand Finette, Jürgen Peter Mohrbutter, Sven George Wolfram
  • Publication number: 20120053305
    Abstract: Disclosed is a method for making LLDPE grades having different xylene solubles or hexane extractables with the same Ziegler-Natta catalyst by varying the amount of alkylaluminum used for polymerization. The method comprises copolymerizing ethylene with a C3-10 ?-olefin in the presence of a Ziegler-Natta catalyst, an alkylaluminum, and an electron donor; determining the dependency of the xylene solubles or hexane extractables on the alkylaluminum/electron donor ratio; and adjusting the alkylaluminum/electron donor ratio to achieve a desired xylene solubles or hexane extractables.
    Type: Application
    Filed: August 24, 2010
    Publication date: March 1, 2012
    Applicant: Equistar Chemicals, LP
    Inventors: Harilaos Mavridis, Debra L. Beran, Jeffrey R. Golden, Joachim T.M. Pater, Giampiero Morini
  • Patent number: 8119752
    Abstract: Process for the continuous preparation of ethylene copolymers by free-radical copolymerization of ethylene and at least one comonomer in a cascade comprising at least two reactors, wherein one or more initiators are fed into the reaction mixture downstream of the first reactor.
    Type: Grant
    Filed: May 16, 2007
    Date of Patent: February 21, 2012
    Assignee: BASF SE
    Inventors: Frank-Olaf Mähling, Wolfgang Kasel, Thomas Zelinski
  • Patent number: 8039563
    Abstract: A process for preparing polymer dispersions stabilized by polyvinyl alcohol includes a step of emulsion polymerization. The polymerization occurs such that at least 60% of the total conversion occurs at a temperature from 100° C. to 140° C.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: October 18, 2011
    Assignee: Wacker Chemie AG
    Inventor: Hans-Peter Weitzel
  • Patent number: 8034885
    Abstract: The present invention provides a novel one-step process for preparing an aqueous polymer dispersion by the free radical aqueous emulsion polymerization comprising mixing at least water, a dispersant, and an oil-soluble initiator; raising a temperature from the starting to the end reaction temperature while metering at least ethylenically unsaturated monomers and a water-soluble initiator into a reaction vessel, conducting polymerization of the monomers in the presence of the water-soluble initiator at a temperature up to the end reaction temperature, and when the temperature has reached the end reaction temperature, conducting polymerization by the oil-soluble initiator. The oil-soluble initiator is inactive at the starting reaction temperature and becomes more active as a temperature approaches the end reaction temperature at which the oil-soluble initiator is fully active.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: October 11, 2011
    Assignee: BASF SE
    Inventors: Jun Gao, Xiang-Ming Kong, Klaus-Dieter Hungenberg, Juergen Schmidt-Thuemmes
  • Patent number: 8013085
    Abstract: Process for preparing an aqueous polymer dispersion by polymerizing at least one ethylenically unsaturated monomer B in an aqueous medium in the presence of polymer particles A and at least one dispersant.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: September 6, 2011
    Assignee: BASF Aktiengesellschaft
    Inventors: Markus Schmid, Mubarik Mahmood Chowdhry, Dieter Distler, Reinhold J. Leyrer
  • Patent number: 7973110
    Abstract: Preparing a non-ionic copolymer having a hydrolysable monomer residue and a polyether macromonomer residue in a semicontinuous mode in a polymerization reactor associated with a metering device, including introducing polyether macromonomer and water into the reactor, wherein hydrolysable monomer which is added thereto forms a polymerization reaction mixture; introducing hydrolysable monomer into the metering device; adding hydrolysable monomer into the reactor from the metering device; passing a free radical polymerization initiator into the reactor before and/or during the addition of the hydrolysable monomer, the hydrolysable monomer and the polyether macromonomer reacting by free radical polymerization to form the non-ionic copolymer; and, subjecting the reaction mixture to polymerization while an addition rate of the hydrolysable monomer and/or at least a component of the polymerization initiator is varied stepwise or continuously.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: July 5, 2011
    Assignee: Construction Research & Technology GmBH
    Inventors: Klaus K. Lorenz, Alexander Kraus, Barbara Wimmer, Petra Wagner, Christian Scholz, Manfred Bichler
  • Publication number: 20110112261
    Abstract: Process for the preparation of polybutadiene effected by the polymerization of butadiene in an aliphatic and/or cyclo-aliphatic solvent in the presence of a catalytic system prepared in situ which comprises: (i) a carboxylate of neodymium soluble in the process solvent containing a variable quantity of water, the H2O/Nd molar ratio ranging from 0.001/1 to 0.50/1; (ii) an alkyl compound of aluminum; (iii) an alkyl compound of aluminum in which at least one bond of Al consists of an Al—Cl bond; The total Al/Nd molar ratio ranging from 4/1 to 12/1, and the Cl/Nd molar ratio ranging from 2/1 to 6/1.
    Type: Application
    Filed: March 19, 2009
    Publication date: May 12, 2011
    Applicant: POLIMERI EUROPA S.P.A.
    Inventors: Gian Tommaso Viola, Marianna Zinna
  • Patent number: 7897705
    Abstract: The purpose of the present invention is to provide a process for producing an olefin polymer, which can produce an olefin polymer having a higher molecular weight by lowering hydrogen concentration efficiently in polymerizing an olefin in the presence of hydrogen by use of a gas phase reaction vessel. There is provided a process for producing an olefin polymer comprising the steps of: using a gas phase reaction vessel; polymerizing an olefin by use of a catalyst for olefin polymerization in the presence of hydrogen; and adding a hydrogenation catalyst to a bed portion in the gas phase reaction vessel.
    Type: Grant
    Filed: August 3, 2009
    Date of Patent: March 1, 2011
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Yuki Aso, Noriyuki Satou, Shin-ichi Kumamoto
  • Patent number: 7851567
    Abstract: The present invention relates to a process for the preparation of multimodal ethylene homo- or copolymers in at least two stages, the process comprising preparation of a first ethylene homo- or copolymer fraction in a loop reactor in slurry phase, preparation of a second ethylene homo- or copolymer fraction in a gas phase reactor, by using a catalyst not containing an inorganic oxide support, and operating the gas phase reactor in such conditions that at least part of the gas is recycled, and that at least a part of the recycled gas is condensed and the (partially) condensed gas is re-introduced into the gas phase reactor.
    Type: Grant
    Filed: August 8, 2006
    Date of Patent: December 14, 2010
    Assignee: Borealis Technology Oy
    Inventors: Henrik Andtsjoe, Michiel Bergstra, Ralf Karlsson, Klaus Nyfors, Urban Thorngren
  • Patent number: 7847042
    Abstract: The invention discloses a metallocene catalysed slurry polymerisation process of ethylene in the presence of a low concentration of scavenger. This allows improving the anti-sheeting of the reactor during the polymerisation process.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: December 7, 2010
    Assignee: Total Petrochemicals Research Feluy
    Inventors: Olivier Miserque, Martine Slawinski, Daniel Siraux, Alain Brusselle
  • Patent number: 7834115
    Abstract: The present invention relates to an improved method for preparing an ethylene-silane copolymer comprising hydrolysable silane groups by radical-initiated polymerisation of ethylene and an olefinically unsaturated silane compound, such as vinyl trimethoxysilane (VTMS). Said method is performed in a multi-zone reactor comprising two or more reaction zones, wherein advantageously essentially all of the silane compound is introduced into the first reaction zone to provide a higher conversion of silane monomer into polymer.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: November 16, 2010
    Assignee: Borealis Technology Oy
    Inventors: Kenneth Johansson, Roger Carlsson
  • Patent number: 7759438
    Abstract: The present invention relates to an aqueous dispersion polymerization process for preparing a (co)polymer wherein an organic peroxide is used as initiator (as a source of free radicals) during the polymerization process in conjunction with an effective amount of an organic peroxide stabilizing additive (controlling agent). The invention also relates to formulations comprising an organic peroxide and an effective amount of an organic peroxide stabilizing additive suitable for use in said polymerization process. The invention finally relates to 10 (co)polymers obtainable by the dispersion polymerization process.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: July 20, 2010
    Assignee: Akzo Nobel N.V.
    Inventors: Johannes Jacobus Theodorus De Jong, Johannes Willibrordus Antonius Overkamp, Andreas Petrus Van Swieten, Koen Antoon Kornelis Vanduffel, Hans Westmijze
  • Patent number: 7741414
    Abstract: A process for transitioning between Ziegler Natta (Z/N) polymerization catalysts and Second Polymerization catalysts in a polymerization system which includes at least two polymerization reactors. During the transition, the Z/N catalyst is used in the “downstream” reactor, thereby providing a flow of polymer to finishing operations. This eliminates the need for lengthy shutdowns of finishing equipment and thereby improves the efficiency of the plant operations.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: June 22, 2010
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Stephen John Brown, Kenneth Edward Taylor, Bobbi Leigh Liebrecht
  • Patent number: 7700705
    Abstract: Accelerator composition for a rubber latex derived from a conjugated diene and optionally a vinyl aromatic comonomer comprising: (i) a diethyl dithiocarbamate (like e.g. ZDEC), and (ii) diphenylguanidine (DPG), and substantially free of any thiazole derivative, a curable aqueous synthetic rubber latex composition comprising said accelerator composition, and a process for the water-based solvent-free manufacture of synthetic shaped synthetic elastomeric articles, prepared by using said accelerator composition.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: April 20, 2010
    Assignee: Kraton Polymers U.S. LLC
    Inventor: Evert Van Jole