Six Carbon Atoms Only Patents (Class 526/348.4)
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Patent number: 7335715Abstract: An ethylene-?-olefin copolymer having monomer units derived from ethylene and monomer units derived from an ?-olefin of 3 to 20 carbon atoms, a density of 906 to 970 kg/m3, an activation energy of flow of 50 kJ/mol or more and a heat quantity of fusion of a cold xylene soluble part of 30 J/g or more, and satisfying specific relations among a rate of the cold xylene soluble part in the copolymer, the density, a melt flow rate and a characteristic relaxation time.Type: GrantFiled: October 24, 2005Date of Patent: February 26, 2008Assignee: Sumitomo Chemical Company, Ltd.Inventors: Yuki Iseki, Katsuhiro Yamada, Tatsuhiro Nagamatsu
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Patent number: 7335716Abstract: An ethylene (co)polymer of the present invention is a (co)polymer with excellent moldability and mechanical properties and either an ethylene homopolymer or a copolymer of ethylene and an ?-olefin of 4 to 20 carbon atoms. The (co)polymer has methyl branches measured by 13C-NMR less than 0.1 in number per 1,000 carbon atoms and Mw/Mn measured by GPC not lower than 1.8 and lower than 4.5. The (co)polymer is either an ethylene homopolymer or a copolymer of ethylene and an ?-olefin of 3 to 20 carbon atoms. The melt tension (MT) and the swell ratio (SR) satisfy the relation; log(MT)>12.9?7.15×SR; and the intrinsic viscosity ([?]) and the melt flow rate (MFR) satisfy the relation; [?]>1.85×MFR?0.192 in the case of MFR?1 and the relation; [?]>1.85×MFR?0.213 in the case of MFR?1. Such an ethylene (co)polymer can be usable for various molding applications and especially suitable for pipes.Type: GrantFiled: June 16, 2000Date of Patent: February 26, 2008Assignee: Mitsui Chemicals, Inc.Inventors: Mamoru Takahashi, Tetsuji Kasai, Junji Saito, Naoto Matsukawa, Kazutaka Tsuru, Makoto Mitani, Terunori Fujita, Shiro Otsuzuki, Tetsuhiro Matsumoto, Toshiyuki Tsutsui
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Publication number: 20080015316Abstract: Provided are a propylene polymer compositions comprising a propylene copolymer and a propylene homopolymer polymerized in the presence of the propylene copolymer. The propylene polymer compositions exhibit properties such as broad molecular weight distribution, low crystallinity, high solubles and superior crystallization kinetics and are useful in fast cycle-time processing methods such as injection molding, sheet extrusion, thermoforming, and oriented film fabrication. Also provided is a process for preparing the propylene polymer compositions in the presence of a catalyst and at least two electron donors using sequential or parallel polymerization reaction zones. Finally, articles made from the propylene polymer composition are provided, particularly articles requiring high stiffness, high heat deflection temperature, good fatigue resistance and low temperature impact resistance such as appliance parts.Type: ApplicationFiled: July 12, 2006Publication date: January 17, 2008Inventors: Chon-Yie Lin, Stephen Francis Broadbent
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Publication number: 20080004411Abstract: A polyethylene film comprising a polymer composition having the characteristics of a total energy dart drop, measured in accordance with ASTM D4272, of greater than a bout 0.45 ft.lbf, a dart drop impact strength, measured in accordance with ASTM D1709 Method A, of greater than about 135 g, and a moisture vapor transmission rate, measured in accordance with ASTM F1249 at 100° F. and 90% relative. humnidity, of less tha about 0.85 g-mil/100 square inch/24 hr, wherein said ASTM tests are performed on a test specimen having a 0.8 mil thickness.Type: ApplicationFiled: June 28, 2006Publication date: January 3, 2008Applicant: Chevron Phillips Chemical Company LPInventors: Ashish M. Sukhadia, Joel L. Martin, Qing Yang, Kumudini C. Jayaratne, J. Todd Lanier
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Patent number: 7314905Abstract: A film that has high rigidity and high heat resistance and good releasability from a roughened copper foil surface, which is subjected to surface oxidization or etching treatment with acid, such as a black oxidized copper foil surface and that is suitable as a release film for producing an MLB; and a process for producing the same. A drawn film having a layer (A) which comprises a copolymer that is made from 4-methyl-1-pentene and ethylene or an ?-olefin, except 4-methyl-1-pentene, having 3 to 20 carbon atoms and that comprises 80% or more by mole of 4-methyl-1-pentene, the thermal coefficient of contraction of the film being 20% or more in the film-drawn direction, or the peel area of the film being 50% or more when the film, together with a copper foil surface subjected to roughening treatment, is subjected to heating and pressing treatment. This film is suitable for producing an MLB and has good releasability from the roughened copper foil surface, for example, a black oxidized copper foil surface.Type: GrantFiled: March 26, 2004Date of Patent: January 1, 2008Assignee: Mitsui Chemicals, Inc.Inventors: Shigetoshi Nishijima, Shinichi Imuta, Toshiyuki Hirose
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Patent number: 7304118Abstract: An ethylene-based copolymer for non-crosslinked water supply pipe is provided. The ethylene-based copolymer is prepared using a supported hybrid metallocene catalyst and has a dimodal or broad molecular weight distribution. The ethylene-based copolymer has a high density molecular structure in a low molecular weight and has a low density molecular structure with high content of a comonomer in a high molecular weight. The ethylene-based copolymer has a molecular weight distribution of 5-30 and the distribution of copolymerization of ethylene and C3-20 ?-olefin is localized in high molecular weight chains. Accordingly, the ethylene-based copolymer has superior processability, internal pressure creep resistance at high temperatures and environmental stress crack resistance.Type: GrantFiled: April 7, 2005Date of Patent: December 4, 2007Assignee: LG Chem, Ltd.Inventors: Ki Soo Lee, Choong Hoon Lee, Sangwoo Lee, Eunjung Lee, Soojeong Lee, Seungwoo Choi
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Patent number: 7282546Abstract: Polyolefins may be prepared using a cocatalyst conforming to the formula: AIRz(Xz)nLzm wherein Rz is a linear or branched organic moiety having at least 5 carbons and Xz is a linear or branched organic moiety having at least 5 carbons or a heterocyclic moiety having at least 4 atoms and can be anionic or di-anionic. The aluminum complex may also be in the form of an adduct complex where Lz is a Lewis base and m=1-3. The cocatalyst Rz components are selected such that they do not react with water under polymerization conditions to form a species that is highly soluble in the polymerization diluent. Use of the specified cocatalyst reduces fouling during metallocene-catalyzed runs and “post-metallocene hangover” when the same production equipment is transitioned to non-metallocene catalyst runs using catalysts such as chromium.Type: GrantFiled: June 22, 2005Date of Patent: October 16, 2007Assignee: Fina Technology, Inc.Inventors: Steven Gray, Henry Enriquez, David Knoeppel
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Publication number: 20070179046Abstract: Provided is catalyst composition including a transition metal complex precatalyst represented by Formula 1; a first cocatalyst represented by Formula 2 which is an alkylaluminum compound; and a second cocatalyst represented by Formula 3 which is a salt compound comprising a Bronsted acid cation and a noncoordinating, compatible anion. Here, R1, R2, R3, R4, E, Q1, Q2 and M are defined in the specification. Al(R6)3 Formula 2 Here, R6 is defined in the specification. [L-H]+[ZA4]? Here, L, [L-H]+, Z and A are defined in the specification. A catalyst composition including binuclear transition metal complexes, an alkylaluminum compound, and a salt compound including a Bronsted acid cation, and a noncoordinating, compatible anion, and a method of preparing the catalyst composition are provided. The activity of the catalyst composition has been improved.Type: ApplicationFiled: February 1, 2007Publication date: August 2, 2007Applicant: LG CHEM, LTD.Inventors: Eunjung LEE, Choong Hoon LEE, Seungwhan JUNG, Jung A LEE, Boram LEE
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Patent number: 7041765Abstract: Films with excellent machine direction (MD) tear properties comprise at least one layer made from a polymer comprising: (A) at least 50 weight percent (wt%) propylene; and (B) at least 5 wt % ethylene and/or one or more unsaturated comonomers. Representative of component (B) unsatuarated comonomers are the C4-20 ?-olefins, C4-20 dienes, styrenic compounds, and the like. Preferably, the film has at least one of a (i) haze value of less than about 10, (ii) 45 degree gloss of greater than about 65, and (iii) dart value of greater than about 100 g/mil. In one preferred embodiment, the layer comprises a compolymer characterized as having at least one of the following properties: (i) 13C NMR peaks corresponding to a regio-error at about 14.6 and about 15.7 ppm, the peaks of about equal intensity, (ii) a B-value greater than about 1.4 when the comonomer content, i.e.Type: GrantFiled: November 5, 2002Date of Patent: May 9, 2006Assignee: Dow Global Technologies Inc.Inventors: Li-Min Tau, Pak-Wing S. Chum, Seema Karande, Clive Bosnyak
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Patent number: 7034092Abstract: A process for producing bimodal polyethylene resins in two reactors in series, the process comprising producing a first polyethylene resin fraction in a first slurry loop reactor in a diluent in the presence of a catalyst and producing a second polyethylene resin fraction in a second slurry loop reactor, serially connected to the first reactor, in the diluent in the presence of the catalyst, the first polyethylene resin fraction being passed from the first reactor to the second reactor together with the catalyst, one of the first and second reactors producing a resin fraction of higher molecular than the resin fraction produced by the other of the first and second reactors, characterised in that the first reactor is fed with a feed of ethylene and diluent having an ethylene content of at least 70 wt % based on the weight of the diluent and in that in the first reactor the slurry of polyethylene in the diluent has a solids content of at least 30 wt % based on the weight of the diluent.Type: GrantFiled: October 2, 2001Date of Patent: April 25, 2006Assignee: Total Petrochemicals Research FeluyInventor: Philippe Marechal
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Patent number: 7022781Abstract: A catalyst system composition comprising a chromium compound supported on a silica-titania support, wherein said catalyst system has been reduced with carbon monoxide, and a cocatalyst selected from the group consisting of i) alkyl lithium compounds, ii) dialkyl aluminum alkoxides in combination with at least one metal alkyl selected from the group consisting of alkyl zinc compounds, alkyl aluminum compounds, alkyl boron compounds, and mixtures thereof and iii) mixtures thereof can be used to polymerize olefins to produce a low density polymer with a decreased melt index and/or high load melt index. This catalyst system also can be used with a Ziegler-Natta catalyst system to polymerize olefins. Polymerization processes using these catalyst system compositions are also provided.Type: GrantFiled: July 5, 2005Date of Patent: April 4, 2006Assignee: Phillips Petroleum CompanyInventors: Max P. McDaniel, Joseph S. Shveima, Elizabeth A. Benham, Rolf L. Geerts, James L. Smith
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Patent number: 6992152Abstract: Apparatus for olefin polymerization includes one or more shell and tube olefin polymerization reactors, each of which has an olefin polymerization reaction mixture inlet connection and a crude polyolefin product outlet connection. Each reactor is equipped with a recirculation system including a pump arranged to circulate a reaction mixture through the tube side of the reactor independently of the introduction of olefin polymerization reaction mixture into the reactor. The apparatus may also include an inlet reaction mixture distribution manifold and an outlet polymerization reaction mixture collection manifold interconnecting the reactors for operation in parallel. The apparatus also includes catalyst composition and catalyst modifier inlets for each reactor arranged such that a catalyst modifier to may be introduced into each reactor at a rate which is independent of the introduction of catalyst composition.Type: GrantFiled: August 19, 2004Date of Patent: January 31, 2006Assignee: Texas Petrochemicals LPInventors: Christopher Lobue, Gilbert Valdez, Daniel Herndon, C. Edward Baxter, Jr., Russell E. Reid, Sr.
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Patent number: 6987155Abstract: The present invention relates to photoresist monomers, polymers formed therefrom and photoresist compositions suitable for photolithography processes employing a DUV light source, such as KrF (249 nm) and ArF(193 nm); EUV; VUV; E-beam; ion-beam; and X-ray. Photoresist monomers of the present invention are represented by the following Chemical Formula 1: wherein, m is 1 or 2. Polymers of the present invention comprise repeating units derived from the comonomer of Chemical Formula 1, preferably together with monomers of the following Chemical Formula 2: wherein, R* is an acid-labile group, and l is 1 or 2.Type: GrantFiled: March 21, 2003Date of Patent: January 17, 2006Assignee: Hyundai Electronics Industries Co., Ltd.Inventors: Chi Hyeong Roh, Jae Chang Jung
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Patent number: 6977283Abstract: The present invention relates to a process for polymerizing monomer and comonomer(s) utilizing a bulky ligand transition metal metallocene-type catalyst or catalyst system, where the process is operated in the absence of or with a low amount of any of the isomers of the comonomer(s). The level of these isomers in the process of the invention are eliminated or maintained below a threshold level. It has been discovered that removal of certain isomers of the comonomer used in a polymerization process using metallocene-type catalysts results in an improved process.Type: GrantFiled: April 7, 1998Date of Patent: December 20, 2005Assignee: ExxonMobil Chemical Patents Inc.Inventors: John R. Shutt, Kevin R. Squire, Abdulgaffar Vadgama
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Patent number: 6956094Abstract: The invention provides for polymerization catalyst compositions, and for methods for introducing the catalyst compositions into a polymerization reactor. More particularly, the method combines a catalyst component containing slurry and a catalyst component containing solution to form the completed catalyst composition for introduction into the polymerization reactor. The invention is also directed to methods of preparing the catalyst component slurry, the catalyst component solution and the catalyst compositions, to methods of controlling the properties of polymer products utilizing the catalyst compositions, and to polymers produced therefrom.Type: GrantFiled: February 5, 2004Date of Patent: October 18, 2005Assignee: Univation Technologies, LLCInventors: Simon Mawson, Sun-Chueh Kao, Tae Hoon Kwalk, Timothy Roger Lynn, David H. McConville, Matthew Gary McKee, John Francis Szul, Kersten Anne Terry, Timothy T. Wenzel, Mark Gregory Goode, John Henry Oskam, Robert J. Jorgensen, Robert Harold Vogel
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Patent number: 6933353Abstract: A method for preparing a supported organometallic complex is disclosed. An organometallic complex is combined with a support material that has been treated with an organozinc compound. The organometallic complex comprises a Group 3 to 10 transition metal and an indenoindolyl ligand that is bonded to the transition metal. Also disclosed is a process for polymerizing an olefin using the supported complex. Organozinc treatment of the support unexpectedly boosts catalyst activity and polyolefin molecular weight.Type: GrantFiled: July 7, 2003Date of Patent: August 23, 2005Assignee: Equistar Chemicals, LPInventor: Shaotian Wang
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Patent number: 6927258Abstract: Improved thermoplastic polymer blend compositions comprising an isotactic polypropylene component and an alpha-olefin and propylene copolymer component, said copolymer comprising crystallizable alpha-olefin sequences. In a preferred embodiment, improved thermoplastic polymer blends are provided comprising from about 35% to about 85% isotactic polypropylene and from about 30% to about 70% of an ethylene and propylene copolymer, wherein said copolymer comprises isotactically crystallizable propylene sequences and is predominately propylene. The resultant blends manifest unexpected compatibility characteristics, increased tensile strength, and improved process characteristics, e.g., a single melting point.Type: GrantFiled: July 3, 2003Date of Patent: August 9, 2005Assignee: ExxonMobil Chemical Patents Inc.Inventors: Sudhin Datta, Charles Cozewith, Periagaram Ravishankar, Edmund J. Stachowski
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Patent number: 6891002Abstract: A process for producing a polyolefin according to the present invention comprises (co) polymerizing one or two or more ?-olefins in a vapor phase in a fluidized-bed reactor, wherein the concentration of (A) a saturated aliphatic hydrocarbon in the fluidized bed reactor is 1 mol % or more and at least one compound selected from (B) an aliphatic amide and (C) a nonionic surfactant constituted only of carbon, oxygen and hydrogen atoms is made to exist in the reactor. The present invention can provide a process for producing a polyolefin, the process ensuring that the prevention of clogging caused by the generation of sheet or block polymers and a high efficiency of the production of a polyolefin due to good catalytic activity can be accomplished at the same time and also having superb continuous productivity.Type: GrantFiled: March 25, 2003Date of Patent: May 10, 2005Assignee: Mitsui Chemicals, Inc.Inventors: Shinji Abe, Shotaro Matsuda, Satoru Ohtani, Hiroto Nishida, Michiharu Sakata, Tomohiro Arase
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Patent number: 6887957Abstract: A process for the gas-phase (co-)polymerization of olefins in a fluidised bed reactor using a Ziegler-Natta type catalyst characterised in that the polymerisation is performed in the presence of an additive having the formula R—Cl where R is an alkyl group of 2 to 7 carbon atoms.Type: GrantFiled: September 28, 2001Date of Patent: May 3, 2005Assignee: BP Chemicals LimitedInventors: Christine Chabrand, Muriel Esteban, Caroline Mladenov
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Patent number: 6878784Abstract: A multimodal polymer composition for pipes is disclosed. The polymer is a multimodal polyethylene with a density of 0.930-0.965 g/cm3, an MFR5 of 0.2-1.2 g/10 min, an Mn of 8000-15000, an Mw of 180-330×103, and an Mw/Mn of 20-35, said multimodal polyethylene comprising a low molecular weight (LMW) ethylene homopolymer fraction and a high molecular weight (HMW) ethylene copolymer fraction, said HMW fraction having a lower molecular weight limit of 3500, and a weight ratio of the LMW fraction to the HMW fraction of (35-55):(65:45).Type: GrantFiled: July 1, 1999Date of Patent: April 12, 2005Assignee: Borealis TechnologyInventors: Markku Asumalahti, Jari Äärilää{umlaut over ( )}, Ari Palmroos, Mats Bäckman, Anette Nilsson, Magnus Palmlöf
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Patent number: 6867277Abstract: An ethylene-based polymer resin which is obtained by copolymerizing ethylene with an ?-olefin having 5 to 20 carbon atoms, and has a melt flow rate (MFR) measured at 190° C. under a load of 21.18 N according to JIS K7210-1995, of not less than 0.01 g/10 min. and less than 1 g/10 min., wherein the melt flow rate and a melt tension(MT) at 190° C. (unit: cN) of the resin satisfy a relation of the following expression (1) and an intrinsic viscosity [?] (unit: dL/g) and the melt flow rate of the resin satisfy a relation of the following expression (2): 2×MFR?0.59<MT<3.6×MFR?0.66??(1) 1.02×MFR?0.094<[?]<1.50×MFR?0.156??(2).Type: GrantFiled: March 27, 2003Date of Patent: March 15, 2005Assignee: Sumitomo Chemical Company, LimitedInventor: Yuki Iseki
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Patent number: 6864332Abstract: A process for polymerizing monomers in the gas phase, in fluidized bed reactors is described, where unsaturated, gas phase monomers are fed into the reactors in the presence of a mixture of inert diluents having a composition that allows the dew point to be adjusted, this leading to high production rates under stable operation in a non condensed operation mode.Type: GrantFiled: December 29, 2000Date of Patent: March 8, 2005Assignees: Braskem S.A., Convex InternationalInventors: Antonio Luiz Duarte Braganca, Antonio Luiz Ribeiro de Castro Morschbacker, Enio Rubbo, Cid Neto Miro, Tamara Barlem, Arj Mukherjee
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Patent number: 6858681Abstract: The process for producing an olefinic polymer comprises introducing a saturated aliphatic hydrocarbon in a liquid phase state and in a vapor phase state into the aforementioned fluidized-bed and (co)polymerizing in the condition that when the inside radius of the cylinder section of the fluidized-bed reactor is defined as a distance of 1, the relationship between the concentration (C1) of the saturated aliphatic hydrocarbon put in a liquid state in the peripheral portion of the cylinder section at a relative distance of 0.7 to 1.0 from the center of the cylinder section as a start point and the concentration (C2) of the saturated aliphatic hydrocarbon put in a liquid state in the center portion of the cylinder section at a relative distance less than 0.7 from the center fulfills the following equation: C1>C2 at a place close to the upstream section of said gas distributing plate.Type: GrantFiled: March 28, 2003Date of Patent: February 22, 2005Assignee: Mitsui Chemicals, Inc.Inventors: Satoru Ohtani, Shinji Abe, Hiroto Nishida
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Patent number: 6841643Abstract: The additive (b) for a communication cable filler according to the present invention contains as a main component an ethylene/?-olefin copolymer (a) having a number-average molecular weight (Mn), measured by GPC, of 500 to 5,000 and having a crystallizing temperature (Tc (° C.), rate of temperature decrease: 2° C./min) measured by DSC and a density (D (kg/m3)) measured by a density gradient tube method, said Tc and D satisfy the following formula (1): 0.501×D(kg/m3)?366?Tc(° C.)??(1). The communication cable filler (c) according to the invention is prepared by blending (X) 40 to 90% by mass of polybutene (d) having a number-average molecular weight of 200 to 2,400, (Y) 1 to 50% by mass of an oil (e) and (Z) 1 to 15% by mass of the ethylene/?-olefin copolymer (a). The additive for a communication cable filler and the communication cable filler are excellent in the filling workability and the oil retention properties of a cable jelly.Type: GrantFiled: October 18, 2001Date of Patent: January 11, 2005Assignee: Mitsui Chemicals, Inc.Inventors: Hideo Toyoda, Kazunori Okawa
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Publication number: 20040254312Abstract: The invention provides for polymerization catalyst compositions, and for methods for introducing the catalyst compositions into a polymerization reactor. More particularly, the method combines a catalyst component containing slurry and a catalyst component containing solution to form the completed catalyst composition for introduction into the polymerization reactor. The invention is also directed to methods of preparing the catalyst component slurry, the catalyst component solution and the catalyst compositions, to methods of controlling the properties of polymer products utilizing the catalyst compositions, and to polymers produced therefrom.Type: ApplicationFiled: February 5, 2004Publication date: December 16, 2004Inventors: Simon Mawson, Sun-Chueh Kao, Tae Hoon Kwalk, Timothy Roger Lynn, David H. McConville, Matthew Gary McKee, John Francis Szul, Kersten Anne Terry, Timothy T. Wenzel, Mark Gregory Goode, John Henry Oskam, Robert J. Jorgensen, Robert Harold Vogel
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Patent number: 6812314Abstract: The subject invention pertains to branched polyolefin materials that exhibit temperature-sensitive permeability. The subject invention also concerns a package including a polymer material that exhibits temperature-sensitive permeability and separates a respiring article from the surrounding atmosphere. Methods of the subject invention involve placing a respiring article within a container comprising a polymer material exhibiting temperature-sensitive permeability.Type: GrantFiled: October 17, 2001Date of Patent: November 2, 2004Assignee: University of FloridaInventors: Gilberto Joao Lunardi, Christopher D. Batich, Jorge Jardim Zacca, Kenneth Ray Berger, Steven Sargent
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Patent number: 6800711Abstract: Long-chain, branched, propylene-based polymers, of which the melt index and the molecular weight distribution and the melt tension and the limiting viscosity both satisfy specific requirements, have good physical properties that are comparable to or better than those of conventional propylene-based polymers. They have good melt workability and are favorable to large-size blow molding and extrusion foaming. They are favorably used as miscibility improvers for propylene homopolymers and propylene-based copolymers.Type: GrantFiled: April 17, 2003Date of Patent: October 5, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Tomio Tatsumi, Shuji Machida, Mitsugu Kanzawa, Yutaka Minami, Yasuhiro Goto, Masato Kijima
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Patent number: 6800704Abstract: The invention comprises an olefin polymerization process comprising contacting ethylene alone or with one or more olefinically unsaturated comonomers with a Group 3-6 metallocene catalyst compound comprising one &pgr;-bonded ring having a C3 or greater hydrocarbyl, hydrocarbylsilyl or hydrocarbylgermyl substituent said substituent bonded to the ring through a primary carbon atom; and, where the compound contains two &pgr;-bonded rings, the total number of substituents on the rings is equal to a number from 3 to 10, said rings being asymmetrically substituted where the number of substituents is 3 or 4. The invention process is particularly suitable for preparing ethylene copolymers having an MIR less than about 35, while retaining narrow CD even at high comonomer incorporation rates, and with certain embodiments providing ethylene copolymers having improved melt strength with the low MIR.Type: GrantFiled: April 22, 2002Date of Patent: October 5, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: Joseph C. Floyd, Moses Olukayode Jejelowo, Donna Jean Crowther, George Alan Vaughan, Ching Tai Lue
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Publication number: 20040192865Abstract: This invention is related to extruded pipe resins comprising polyethylene.Type: ApplicationFiled: February 23, 2004Publication date: September 30, 2004Inventors: Scott T. Roger, Thomas W. Towles, Anthony N. Speca, Stanley J. Katzen
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Patent number: 6794476Abstract: Provided are a propylene homopolymer in which a melt tension (MT), a Z average molecular weight (Mz) and a melt index (MI) (g/10 minutes) are specifically related and in which a difference in eluting temperatures and a maximum eluting temperature in programmed temperature fractional chromatography and a propylene copolymer in which a comonomer is specific &agr;-olefin and a content thereof falls in a specific range and in which a melt tension (MT), a Z average molecular weight (Mz) and a melt index (MI) (g/10 minutes) are specifically related. The propylene homopolymer or the propylene copolymer of the present invention has physical properties equivalent to or not lower than those of conventional propylene polymers, and it can be controlled in a melt tension and is suited to foaming molding, sheet molding and blow molding.Type: GrantFiled: March 19, 2002Date of Patent: September 21, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Shuji Machida, Takashi Saeki, Tomio Tatsumi
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Patent number: 6753387Abstract: Methods for controlling the temperature of an olefin polymerization reactor (e.g., a polyethylene reactor) system are disclosed herein. The olefin polymerization reactor system includes a polymerization reactor and a cooling jacket in thermal contact with the reactor. An aqueous froth is present in the jacket, and the pressure therein is maintained below atmospheric pressure. Control of the pressure in the jacket controls the boiling temperature of the jacket fluid, and thus, controls the rate of heat transfer from the reactor to the fluid in the jacket. This provides an efficient and simple means for controlling the reactor temperature.Type: GrantFiled: March 19, 2003Date of Patent: June 22, 2004Assignee: Chevron Phillips Chemical Company LPInventors: John H. Tait, Rajinder Sharma, James E. Hein, Gary A. Marek
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Publication number: 20040110632Abstract: An olefin polymerization pre-catalyst, an activated catalyst and a process for preparing the catalysts are described herein.Type: ApplicationFiled: November 20, 2003Publication date: June 10, 2004Applicant: The University of Maryland, College ParkInventors: Lawrence R. Sita, Yonghui Zhang
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Patent number: 6747113Abstract: A polymer produced by a transition metal containing catalyst useful for the polymerization of &agr;-olefins is prepared by (A) forming in an inert atmosphere which excludes oxygen and moisture a slurry of (1) a porous inorganic oxide support material selected from the group consisting of silica, alumina, or a combination of silica and alumina, said support material containing not greater than about 5 millimoles of hydroxyl groups per gram of support material and a particle size not greater than about 10 microns and a surface area of from about 50 to about 800 m2/g in an inert organic liquid medium; (B) mixing said slurry with (2) an alkoxide and stirring the resultant mixture at a temperature of from about −20° C. to about 120° C.Type: GrantFiled: November 17, 2000Date of Patent: June 8, 2004Assignee: The Dow Chemical CompanyInventors: Lee Spencer, Miriam P. Ripplinger, Brian W. S. Kolthammer, Jeffrey J. Wooster
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Patent number: 6743858Abstract: A method of making a sterile adhesive composition includes placing a mixture of a polymerizable adhesive monomer and a thickening agent in a container, sealing the container, and sterilizing the mixture and the container. The method provides superior viscosity for the monomer composition. An adhesive composition includes 2-octyl cyanoacrylate and at least one thickener. The sterile adhesive composition is particularly useful as a medical adhesive and can comprise 1,1-disubstituted ethylene monomers, such as &agr;-cyanoacrylates.Type: GrantFiled: April 12, 2002Date of Patent: June 1, 2004Assignee: Closure Medical CorporationInventors: Timothy Hickey, Ubonwan A. Stewart, Jerry Jonn, John S. Bobo
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Patent number: 6716936Abstract: The use of two or more light solvent boiling pool reactors in series allows polymerization of ethylene and comonomer(s) to cost effectively produce bimodal polyethylene copolymers having lower densities than are practically achievable with conventional stirred tank, slurry loop or gas phase reactor technologies. Introducing catalyst to only the first reactor, operating the first reactor at high hydrogen compositions, and using a plurality of series-connected flash drums to remove hydrogen from the first reactor polymer slurry product stream allows for the production of highly homogeneous high molecular weight bimodal polyethylene resins.Type: GrantFiled: December 16, 2002Date of Patent: April 6, 2004Assignee: Equistar Chemicals L.P.Inventors: Patrick J. McGrath, Ronald J. Morris, Roy W. Kreitz
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Publication number: 20040030082Abstract: An ethylene-based polymer resin which is obtained by copolymerizing ethylene with an &agr;-olefin having 5 to 20 carbon atoms, and has a melt flow rate (MFR) measured at 190° C. under a load of 21.18N according to JIS K7210-1995, of not more than 0.01 g/10 min. and less than 1 g/10 min., wherein the melt flow rate and a melt tension (MT) at 190° C.Type: ApplicationFiled: March 27, 2003Publication date: February 12, 2004Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventor: Yuki Iseki
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Patent number: 6677395Abstract: Irradiated, oxidized olefin polymer dispersing aids for use in the manufacture of additive concentrates and additive-containing olefin polymer compositions.Type: GrantFiled: November 27, 2002Date of Patent: January 13, 2004Assignee: Basell Poliolefine Italia S.p.A.Inventors: Vu A. Dang, Richard J. Fezza, Daniel E. Schneckenburger, Cheng Q. Song
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Publication number: 20030236366Abstract: A copolymer of ethylene and a higher alpha olefin, preferably 1-hexene, can be produced using an activated chromium containing catalyst system and a cocatalyst selected from the group consisting of trialkylboron, trialkylsiloxyalutninum, and a combination of trialkylboron and thalkylaluminum compounds. The polymerization process must be carefully controlled to produce a copolymer resin having an exceptionally broad molecular weight distribution, extremely high PENT ESCR values, and a natural branch profile that impacts branching preferably into the high molecular weight portion of the polymer. The resulting copolymer resin is especially useful in high stiffness pipe applications.Type: ApplicationFiled: December 16, 2002Publication date: December 25, 2003Inventors: Max P. McDaniel, Elizabeth A. Benham, Al R. Wolfe, Paul J. DesLauriers
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Patent number: 6646074Abstract: A process for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor using a Ziegler-Nata type catalyst wherein the polymerisation is performed in the presence of a process aid additive selected from at least one of (1) a polysulphone copolymer; (2) a polymeric polyamine or (3) an oil-soluble sulphonic acid.Type: GrantFiled: March 8, 2002Date of Patent: November 11, 2003Assignee: BP Chemicals LimitedInventors: Marc Herzog, Jean-Pierre Isnard, Claudine Viviane Lalanne-Magne, Myung Je Shin
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Publication number: 20030208024Abstract: Long-chain, branched, propylene-based polymers, of which the melt index and the molecular weight distribution and the melt tension and the limiting viscosity both satisfy specific requirements, have good physical properties that are comparable to or better than those of conventional propylene-based polymers. They have good melt workability and are favorable to large-size blow molding and extrusion foaming. They are favorably used as miscibility improvers for propylene homopolymers and propylene-based copolymers.Type: ApplicationFiled: April 17, 2003Publication date: November 6, 2003Inventors: Tomio Tatsumi, Shuji Machida, Mitsugu Kanzawa, Yutaka Minami, Yasuhiro Goto, Masato Kijima
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Publication number: 20030199648Abstract: The present invention is directed to homo-polymers and copolymers of mono-1-olefins, a method of making such polymers, and uses of such polymers. Polymers of the present invention are formed by contacting at least one mono-1-olefin having from 2 to about 20 carbon atoms per molecule and at least one mono-1-olefin co-monomer having from 2 to about 10 carbon atoms per molecule in a reaction zone under polymerization conditions in the presence of a hydrocarbon diluent, a catalyst system, and a cocatalyst. The catalyst system of the present invention comprises a chromium source on an aluminophosphate support which has a phosphorous to aluminum mole ratio of less than about 0.3. Further, the catalyst system is treated with less than about 7 weight percent fluoride based on the weight of the support and is calcined. Cocatalyst are selected from trialkylboron compounds, triarylboron compounds, alkylaluminum compounds, and combinations thereof.Type: ApplicationFiled: February 24, 2003Publication date: October 23, 2003Inventors: Max P. McDaniel, Elizabeth A. Benham, Al R. Wolfe, Paul J. DesLauriers, Pamela L. Meager, William R. Coutant, David C. Rohlfing, Steven J. Secora
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Publication number: 20030195320Abstract: Elastic ethylene polymers are disclosed which have, processability similar to highly branched low density polyethylene (LDPE), but the strength and toughness of linear low density polyethylene (LLDPE). The polymers have processing indices (PI's) less than or equal to 70 percent of those of a comparative linear ethylene polymer and a critical shear rate at onset of surface melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a traditional linear ethylene polymer at about the same I2 and Mw/Mn. The novel polymers can also have from about 0.01 to about 3 long chain branches/1000 total carbons and have higher low/zero shear viscosity and lower high shear viscosity than comparative liner ethylene polymers. T novel polymers can also be characterized as having a melt flow ratio, I10/I2,≧5.63, a molecular weight distribution, Mw/Mn, defined by the equation: Mw/Mn≦(I10/I2)−4.Type: ApplicationFiled: January 30, 2003Publication date: October 16, 2003Inventors: Shih-Yaw Lai, John R. Wilson, George W. Knight, James C. Stevens
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Publication number: 20030191259Abstract: The present invention relates to photoresist monomers, polymers formed therefrom and photoresist compositions suitable for photolithography processes employing a DUV light source, such as KrF (249 nm) and ArF(193 nm); EUV; VUV; E-beam; ion-beam; and X-ray.Type: ApplicationFiled: March 21, 2003Publication date: October 9, 2003Applicant: Hyundai Electronics Industries Co., Ltd.Inventors: Chi Hyeong Roh, Jae Chang Jung
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Patent number: 6630553Abstract: A process for preparing a butyl polymer, the process comprising contacting a C4 to C8 monoolefin monomer with a C4 to C14 multiolefin monomer at a temperature in the range of from about −100° C. to about +50° C. in the presence of a diluent and a catalyst mixture comprising a monoalkylaluminum dihalide and an aluminoxane.Type: GrantFiled: December 19, 2001Date of Patent: October 7, 2003Assignee: Bayer Inc.Inventor: Adam Gronowski
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Publication number: 20030181605Abstract: A process for producing a polyolefin according to the present invention comprises (co) polymerizing one or two or more &agr;-olefins in a vapor phase in a fluidized-bed reactor, wherein the concentration of (A) a saturated aliphatic hydrocarbon in the fluidized bed reactor is 1 mol % or more and at least one compound selected from (B) an aliphatic amide and (C) a nonionic surfactant constituted only of carbon, oxygen and hydrogen atoms is made to exist in the reactor. The present invention can provide a process for producing a polyolefin, the process ensuring that the prevention of clogging caused by the generation of sheet or block polymers and a high efficiency of the production of a polyolefin due to good catalytic activity can be accomplished at the same time and also having superb continuous productivity.Type: ApplicationFiled: March 25, 2003Publication date: September 25, 2003Inventors: Shinji Abe, Shotaro Matsuda, Satoru Ohtani, Hiroto Nishida, Michiharu Sakata, Tomohiro Arase
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Patent number: 6624273Abstract: Non-tacky, base polymers are plasticized into pressure-sensitive adhesives and comprise: a) about 100 parts by weight of a base copolymer having a Tg greater than about 0° C., wherein the base copolymer is formed from and comprises: (1) about 50 to 70% by weight of a high Tg comonomer component, wherein the homopolymer formed from the high Tg comonomer component has a Tg of at least about 20° C.; (2) optionally, up to about 20% by weight based on the total weight of the base copolymer of an acidic comonomer; and (3) about 30 to 50% by weight of one or more low Tg (meth)acrylate comonomer, wherein the Tg homopolymer of the low Tg comonomer is less than about 20° C., and b) about 1 to about 100 parts based on the base copolymer of a nonreactive, non-volatile, non-acrylic-based plasticizing agent.Type: GrantFiled: August 13, 1999Date of Patent: September 23, 2003Assignee: 3M Innovative Properties CompanyInventors: Albert I. Everaerts, Eric B. T. Moonen, Peter A. Stark
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Publication number: 20030166809Abstract: A process for preparing a butyl polymer having a broad molecular weight distribution. The process comprises the step of contacting a C4 to C8 monoolefin monomers with a C4 to C14 multiolefin monomer at a temperature in the range of from about −100° C. to about +50° C. in the presence of a diluent and a catalyst mixture comprising a major amount of a dialkylalumium halide, a minor amount of a monoalkylaluminum dihalide, and a minute amount of an aluminoxane.Type: ApplicationFiled: February 26, 2003Publication date: September 4, 2003Inventor: Adam Gronowski
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Patent number: 6605676Abstract: The process is characterized by the use of catalyst systems consisting of a single metallocene catalyst activated with mixtures of at least 2 co-catalysts. The co-catalysts are aluminium alkyls, aluminoxanes or boron compounds. Different active centers are produced in the catalyst through the use of these mixed co-catalyst systems, each having different rates of initiation and completion of the polymerization reaction, which give rise to polyolefins with different molecular weights, resulting in products with broad bimodal or multimodal molecular weight distributions and the incorporation of co-monomer can be controlled by appropriate selection of the metallocene and use of combinations of different types of co-catalysts, as well as by varying the reactor pressure, the reaction temperature and the molar ratios between the various components of the catalyst system.Type: GrantFiled: December 28, 1995Date of Patent: August 12, 2003Assignee: Repsol Quimica, S.A.Inventors: Wilfried Michiels Vega, Antonio Munoz-Escalona
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Patent number: 6593438Abstract: This invention relates to a composition of matter comprising the catalyst compound comprising a transition metal complexed with a facially coordinating tridentate bisamide ligand. The invention is also directed to a catalyst system or a supported catalyst system comprising this compound and an activator and to a process for using the catalyst system or supported catalyst system in a process for polymerizing olefin(s).Type: GrantFiled: December 4, 2000Date of Patent: July 15, 2003Assignee: Univation Technologies, LLCInventor: John H. Oskam
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Patent number: 6586543Abstract: The present invention provides a process for preparing a substantially amorphous poly-&agr;-olefin, which includes: a) preforming a solid catalyst and, optionally, a first amount of a trialkylaluminum cocatalyst, by contacting the catalyst and optionally the cocatalyst with at least one selected from the group including oxygen and a compound which includes active oxygen, to form a preformed catalyst, wherein the solid catalyst includes magnesium, aluminum and titanium, and wherein said trialkylaluminum cocatalyst includes 1 to 9 carbon atoms in each alkyl group; b) contacting the preformed catalyst with a second amount of the cocatalyst, wherein a molar ratio of trialkylaluminum to the titanium ranges from 40:1 to 700:1, to form a catalyst mixture; c) polymerizing, in the liquid phase, with the catalyst mixture, an olefin or an olefin mixture at a temperature between 30 and 160° C., to produce the poly-&agr;-olefin.Type: GrantFiled: September 1, 2000Date of Patent: July 1, 2003Assignee: Degussa AGInventors: Hans Guenther Wey, Norbert Schlueter