Adding Catalyst Or Catalyst Component Patents (Class 526/86)
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Patent number: 12049890Abstract: A liquid pump including a pump housing having an interior sidewall forming an interior. The housing has an inlet port and an outlet port. A liner is disposed in the interior and has opposed transverse openings in line with the inlet and outlet ports. The liner has a central longitudinally extending bore. A pump piston is axially and rotatably slidable within the liner longitudinal bore for pumping the liquid from the inlet port to the outlet port. A seal assembly is secured to the pump housing adjacent to an upper end of the liner. The seal assembly including a seal body, an upper end of the piston extending though the cap and in sealing engagement with the seal body, the seal assembly and liner upper end forming a cavity there between. An upper end of the piston extending though the seal assembly and in sealing engagement with the seal body, the seal body and liner upper end forming a cavity there between. The housing having a passageway providing a fluid communication between the cavity and the inlet port.Type: GrantFiled: October 8, 2020Date of Patent: July 30, 2024Assignee: FLUID METERING, INC.Inventor: Daniel Lee
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Patent number: 11787943Abstract: 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: GrantFiled: June 27, 2018Date of Patent: October 17, 2023Assignee: Dow Silicones CorporationInventors: Hyun-Ji Kang, Ju-Young Yook
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Patent number: 11708427Abstract: 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: GrantFiled: November 22, 2021Date of Patent: July 25, 2023Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Kensuke Naraki, Taiki Sugamura
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Patent number: 11666729Abstract: 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: GrantFiled: November 1, 2018Date of Patent: June 6, 2023Assignee: Hollister IncorporatedInventors: Horacio Montes De Oca Balderas, Eamonn Casey, Claire McKenna, John P. O'Mahony
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Patent number: 11603489Abstract: 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: GrantFiled: May 3, 2021Date of Patent: March 14, 2023Assignee: ENI S.P.A.Inventors: Lucilla Del Gaudio, Davide Moscatelli, Paola Albonico
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Patent number: 11384164Abstract: 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: GrantFiled: June 8, 2020Date of Patent: July 12, 2022Assignee: Univation Technologies, LLCInventors: Bruce J. Savatsky, R. Eric Pequeno
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Patent number: 11110419Abstract: 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: GrantFiled: August 21, 2018Date of Patent: September 7, 2021Assignee: Haier US Appliance Solutions, Inc.Inventors: Somak Chatterjee, Sharath Chandra Prasad, Srinivas Pasham, Balaji Srinivasan, Gaurav Kumar Verma, Andrew Reinhard Krause, Gregory Sergeevich Chernov
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Patent number: 10252235Abstract: 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: GrantFiled: July 7, 2015Date of Patent: April 9, 2019Assignee: NOVA Chemicals (International) S.A.Inventors: Victoria Ker, Richard Paul Kong-Labrie
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Patent number: 9845368Abstract: 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: GrantFiled: February 18, 2016Date of Patent: December 19, 2017Assignee: Chevron Phillips Chemical Company LPInventors: Guylaine St. Jean, Elizabeth M. Lanier, J. Todd Lanier, Qing Yang, Brooke A. Gill
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Patent number: 9475892Abstract: Process for the continuous transition between two different and compatible polymerization catalysts.Type: GrantFiled: April 13, 2011Date of Patent: October 25, 2016Assignee: INEOS SALES (UK) LIMITEDInventors: Jean-Louis Chamayou, Benoit Sibourd
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Patent number: 9382405Abstract: 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: GrantFiled: January 31, 2012Date of Patent: July 5, 2016Assignee: UNITED INITIATORS GMBH & CO. KGInventors: Martin Kunz, Katharina Seitz, Iris Nagl
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Patent number: 9120880Abstract: 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: GrantFiled: October 10, 2012Date of Patent: September 1, 2015Assignee: Dow Global Technologies LLCInventors: Werner Zschoch, Otto J. Berbee, Cornelis J. Hosman
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Patent number: 8981020Abstract: 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: GrantFiled: December 4, 2012Date of Patent: March 17, 2015Assignee: Bridgestone CorporationInventors: Steven Luo, Kevin M. McCauley, Timothy L. Tartamella, Mark W. Smale, Randhir Shetty
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Patent number: 8969501Abstract: A novel LDPE from radical, high pressure polymerization is devised.Type: GrantFiled: November 10, 2010Date of Patent: March 3, 2015Assignee: Basell Polyolefine GmbHInventors: Gerd Mannebach, Catherine Beuzelin, Christian-Ulrich Schmidt, Thomas Maurer, Jörn Müller, Alexander Wörz, Mike Freudenstein
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Patent number: 8962764Abstract: 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: GrantFiled: March 29, 2010Date of Patent: February 24, 2015Assignee: Carnegie Mellon UniversityInventors: Krzysztof Matyjaszewski, Haifeng Gao, James Spanswick
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Publication number: 20140357814Abstract: 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: ApplicationFiled: August 14, 2014Publication date: December 4, 2014Inventors: Wojciech Jakubowski, James Spanswick
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Patent number: 8846829Abstract: 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: GrantFiled: May 4, 2011Date of Patent: September 30, 2014Assignee: Chevron Phillips Chemical Company LPInventor: Gregory G. Hendrickson
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Patent number: 8841391Abstract: 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: GrantFiled: November 21, 2011Date of Patent: September 23, 2014Assignee: Ineos Sales (UK) LimitedInventors: Bruno Bordais, Christopher James Kemp, Jose Andre Laille, Willy Lemesle, Wilhelm Kalz, Loic Perio
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Patent number: 8816031Abstract: 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: GrantFiled: March 6, 2006Date of Patent: August 26, 2014Assignee: Harima Chemicals, Inc.Inventors: Yoshiharu Kimura, Takahiro Fujiwara
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Patent number: 8710162Abstract: 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: GrantFiled: May 3, 2011Date of Patent: April 29, 2014Assignee: Fina Technology, Inc.Inventors: Ronald Tharappel, Renaud Oreins, William Gauthier, David Attoe, Kevin McGovern, Michel Messiaen, David Rauscher, Kai Hortmann, Michel Daumerie
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Patent number: 8680218Abstract: 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: GrantFiled: January 30, 2013Date of Patent: March 25, 2014Assignee: Chevron Phillips Chemical Company LPInventors: Qing Yang, Max P. McDaniel, Errun Ding, Ted H. Cymbaluk, Tony R. Crain, Gary L. Glass
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Patent number: 8664342Abstract: 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: GrantFiled: September 21, 2009Date of Patent: March 4, 2014Assignee: Ineos Commercial Services UK LimitedInventors: Bruno Bordais, Christohper James Kemp, Jose Andre Laille, Willy Lemesle
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Patent number: 8623973Abstract: 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: GrantFiled: March 8, 2013Date of Patent: January 7, 2014Assignee: Chevron Phillips Chemical Company LPInventors: Max P. McDaniel, Qing Yang, Tony R. Crain, Kathy S. Collins
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Patent number: 8524649Abstract: 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: GrantFiled: August 1, 2008Date of Patent: September 3, 2013Assignee: BASF SEInventors: Reinhold J Leyrer, Kati Schmidt
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Patent number: 8513366Abstract: 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: GrantFiled: March 17, 2006Date of Patent: August 20, 2013Assignee: University of Maryland, College ParkInventors: Lawrence R. Sita, Matthew B. Harney, Yonghui Zhang
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Patent number: 8513342Abstract: 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: GrantFiled: October 18, 2010Date of Patent: August 20, 2013Assignee: University of Pittsburgh—Of the Commonwealth System of Higher EducationInventors: Di Gao, Liangliang Cao
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Patent number: 8481658Abstract: 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: GrantFiled: December 17, 2009Date of Patent: July 9, 2013Assignee: Basell Polyolefine GmbHInventors: Gerhardus Meier, Shahram Mihan
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Patent number: 8410230Abstract: 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: GrantFiled: April 18, 2011Date of Patent: April 2, 2013Assignee: ExxonMobil Research and Engineering CompanyInventors: Gabor Kiss, Robert Patrick Reynolds, Jr., John W. Chu, Patrick Brant, James Richardson Lattner
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Patent number: 8324329Abstract: 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: GrantFiled: August 7, 2007Date of Patent: December 4, 2012Assignee: Bridgestone CorporationInventors: Steven Luo, Kevin M. McCauley, Timothy L. Tartamella, Mark W. Smale, Randhir Shetty
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Patent number: 8293857Abstract: 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: GrantFiled: October 15, 2008Date of Patent: October 23, 2012Assignee: Ineos Europe LimitedInventors: Alain Berardi, Andre Frederich, Dominique Jan, Jean-Jacques Kuhlburger, Anthony Sgard, Alain Van Daele
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Patent number: 8288491Abstract: 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: GrantFiled: January 22, 2009Date of Patent: October 16, 2012Assignee: Toagosei Co. Ltd.Inventors: Akihiro Gotou, Hideo Matsuzaki, Tomotaka Mizuno
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Patent number: 8288468Abstract: 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: GrantFiled: April 11, 2011Date of Patent: October 16, 2012Assignee: Nuplex Resins B.V.Inventors: Dirk Emiel Paula Mestach, Wicenty Lambertus Stanislaw Pilaszek
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Patent number: 8283431Abstract: 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: GrantFiled: April 27, 2004Date of Patent: October 9, 2012Assignee: Akzo Nobel NVInventors: Hans Westmijze, Lambertus Meulenbrugge, Koen Antoon Kornelis Vanduffel, Andreas Petrus Van Swieten
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Patent number: 8273835Abstract: 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: GrantFiled: January 14, 2010Date of Patent: September 25, 2012Assignee: Basell Polyolefine GmbHInventors: Dieter Littmann, Andre-Armand Finette, Hans Joachim Meinke
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Patent number: 8232356Abstract: 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: GrantFiled: November 13, 2008Date of Patent: July 31, 2012Assignee: BASF SEInventors: Reinhold J. Leyrer, Kati Schmidt
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Patent number: 8227559Abstract: 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: GrantFiled: January 12, 2009Date of Patent: July 24, 2012Assignee: Construction Research & Technology GmbHInventors: Jochen Mezger, Alexander Kraus, Harald Grassl, Kerstin Becher
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Patent number: 8217124Abstract: 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: GrantFiled: January 14, 2010Date of Patent: July 10, 2012Assignee: Basell Polyolefine GmbHInventors: Dieter Littmann, Andre-Armand Finette, Jürgen Peter Mohrbutter, Sven George Wolfram
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Publication number: 20120053305Abstract: 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: ApplicationFiled: August 24, 2010Publication date: March 1, 2012Applicant: Equistar Chemicals, LPInventors: Harilaos Mavridis, Debra L. Beran, Jeffrey R. Golden, Joachim T.M. Pater, Giampiero Morini
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Patent number: 8119752Abstract: 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: GrantFiled: May 16, 2007Date of Patent: February 21, 2012Assignee: BASF SEInventors: Frank-Olaf Mähling, Wolfgang Kasel, Thomas Zelinski
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Patent number: 8039563Abstract: 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: GrantFiled: November 16, 2006Date of Patent: October 18, 2011Assignee: Wacker Chemie AGInventor: Hans-Peter Weitzel
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Patent number: 8034885Abstract: 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: GrantFiled: July 8, 2004Date of Patent: October 11, 2011Assignee: BASF SEInventors: Jun Gao, Xiang-Ming Kong, Klaus-Dieter Hungenberg, Juergen Schmidt-Thuemmes
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Patent number: 8013085Abstract: 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: GrantFiled: June 4, 2004Date of Patent: September 6, 2011Assignee: BASF AktiengesellschaftInventors: Markus Schmid, Mubarik Mahmood Chowdhry, Dieter Distler, Reinhold J. Leyrer
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Patent number: 7973110Abstract: 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: GrantFiled: June 3, 2009Date of Patent: July 5, 2011Assignee: Construction Research & Technology GmBHInventors: Klaus K. Lorenz, Alexander Kraus, Barbara Wimmer, Petra Wagner, Christian Scholz, Manfred Bichler
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Publication number: 20110112261Abstract: 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: ApplicationFiled: March 19, 2009Publication date: May 12, 2011Applicant: POLIMERI EUROPA S.P.A.Inventors: Gian Tommaso Viola, Marianna Zinna
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Patent number: 7897705Abstract: 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: GrantFiled: August 3, 2009Date of Patent: March 1, 2011Assignee: Sumitomo Chemical Company, LimitedInventors: Yuki Aso, Noriyuki Satou, Shin-ichi Kumamoto
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Patent number: 7851567Abstract: 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: GrantFiled: August 8, 2006Date of Patent: December 14, 2010Assignee: Borealis Technology OyInventors: Henrik Andtsjoe, Michiel Bergstra, Ralf Karlsson, Klaus Nyfors, Urban Thorngren
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Patent number: 7847042Abstract: 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: GrantFiled: March 29, 2007Date of Patent: December 7, 2010Assignee: Total Petrochemicals Research FeluyInventors: Olivier Miserque, Martine Slawinski, Daniel Siraux, Alain Brusselle
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Patent number: 7834115Abstract: 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: GrantFiled: November 15, 2007Date of Patent: November 16, 2010Assignee: Borealis Technology OyInventors: Kenneth Johansson, Roger Carlsson
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Patent number: 7759438Abstract: 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: GrantFiled: June 18, 2004Date of Patent: July 20, 2010Assignee: Akzo Nobel N.V.Inventors: Johannes Jacobus Theodorus De Jong, Johannes Willibrordus Antonius Overkamp, Andreas Petrus Van Swieten, Koen Antoon Kornelis Vanduffel, Hans Westmijze
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Patent number: 7741414Abstract: 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: GrantFiled: November 22, 2006Date of Patent: June 22, 2010Assignee: Nova Chemicals (International) S.A.Inventors: Stephen John Brown, Kenneth Edward Taylor, Bobbi Leigh Liebrecht