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| Number | Title | Issue Date |
| 8058379 | 4-methyl-1-pentene polymer, process for producing the same and use thereof The present invention provides a 4-methyl-1-pentene polymer having excellent balance between heat resistance and rigidity, a process for producing the polymer, and a film and a LED mold formed from the polymer. The 4-methyl-1-pentene polymer comprises 50 to 100% by ... | 11/15/2011 |
| 7981992 | Catalyst composition comprising shuttling agent for regio-irregular multi-block copolymer formation Copolymers, especially multi-block copolymer containing therein two or more segments or blocks, are prepared by polymerizing propylene, 4-methyl-1-pentene, or another C4-8 α-olefin in the presence of a composition comprising the admixture or reaction pro... | 07/19/2011 |
| 7943716 | Process for polymerizing 1-hexene or higher alpha-olefins A process for preparing a polymer containing derived units of one or more alpha olefins of formula CH2═CHW wherein W is a C3-C10 hydrocarbon radical and optionally from 0 to 81% by mol of derived units of propylene or 1-butene, com... | 05/17/2011 |
| 7524913 | Functionalized poly(4-methyl-1-pentene) An olefin polymer having greater than 95 percent chain end unsaturation, where greater than 80 percent of said unsaturation comprises a 1,2-disubstituted olefinic unsaturation, especially polymers comprising in polymerized form 4-methyl-1-pentene and more especially... | 04/28/2009 |
| 7411023 | Pipe for hot fluids A polymer pipe for hot fluids, usually hot water is described. The pipe is characterised in that it comprises a multimodal polyethylene with a high molecular weight (HMW) fraction and a low molecular weight (LMW) fraction where said HMW fraction has a density of at ... | 08/12/2008 |
| 7339019 | Ethylene-α-olefin copolymer A copolymer having monomer units derived from ethylene and monomer units derived from an α-olefin of 3 to 20 carbon atoms, a density of 906 to 970 kg/m3 and an activation energy of flow of 50 kJ/mol or more, and satisfying specific relations among a melt... | 03/04/2008 |
| 7335716 | Ethylene (co)polymers and uses thereof 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 α-olefin of 4 to 20 carbon atoms. The (co)polymer has methyl branches measure... | 02/26/2008 |
| 7335715 | Ethylene-alpha-olefin copolymer An ethylene-α-olefin copolymer having monomer units derived from ethylene and monomer units derived from an α-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 ... | 02/26/2008 |
| 7314905 | Drawn film and process for producing the same 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 relea... | 01/01/2008 |
| 7304118 | Polyethylene pipe having better melt processibility and high resistance to stress and method of preparing the same using metallocene catalyst 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 de... | 12/04/2007 |
| 7282546 | Cocatalysts for reduction of production problems in metallocene-catalyzed polymerizations 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 | 10/16/2007 |
| 7238747 | Plasticized polypropylene thermoplastics The invention is directed to a plasticized polypropylene thermoplastic composition comprising a blend of A) from 50 to 99.9 wt % of a thermoplastic polymer derived from polypropylene, optionally with one or more copolymerizable monomer selected from C2-C | 07/03/2007 |
| 7211534 | Preparation of a magnesium halide support for olefin polymerization and a catalyst composition using the same A magnesium halide support material for a polyolefin catalysts is disclosed. The magnesium halide of present invention is prepared by reacting magnesium with an alkylhalide in a non-polar hydrocarbon solvent. Preparation of the support does not require the use elect... | 05/01/2007 |
| 7041765 | Films comprising isotactic propylene copolymers 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. Represen... | 05/09/2006 |
| 7037989 | Copolymers of ethylene and/or α-olefins and vicinally disubstituted olefins Substantially random ethylene and/or α-olefin copolymers containing units derived from vicinally disubstituted olefin monomers are described. The vicinally disubstituted olefin monomers may be represented by the generic formula (R1)CH═CH(R2)... | 05/02/2006 |
| 7034092 | Process for producing bimodal polyethylene resins 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 fr... | 04/25/2006 |
| 7022781 | Polymerization catalyst systems and processes using alkyl lithium compounds as a cocatalyst 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 alu... | 04/04/2006 |
| 6992152 | Apparatus and method for controlling olefin polymerization process 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 rec... | 01/31/2006 |
| 6987155 | Polymers for photoresist and photoresist compositions using the same 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. Photoresi... | 01/17/2006 |
| 6977283 | Polymerization process 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... | 12/20/2005 |
| 6956094 | Bimodal polyolefin 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 containin... | 10/18/2005 |
| 6933353 | Olefin polymerization process 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 inde... | 08/23/2005 |
| 6927258 | Elastic blends comprising crystalline polymer and crystallizable polymers of propylene 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 thermoplasti... | 08/09/2005 |
| 6916882 | Plasticized polypropylene thermoplastics The invention is directed to a plasticized polypropylene thermoplastic composition comprising a blend of A) from 50 to 99.9 wt % of a thermoplastic polymer derived from polypropylene, optionally with one or more copolymerizable monomer selected from C2-C | 07/12/2005 |
| 6891002 | Process for producing polyolefin A process for producing a polyolefin according to the present invention comprises (co) polymerizing one or two or more α-olefins in a vapor phase in a fluidized-bed reactor, wherein the concentration of (A) a saturated aliphatic hydrocarbon in the fluidized bed rea... | 05/10/2005 |
| 6887957 | Process for the gas-phase (co-)polymerization of olefins in a fluidized bed reactor 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... | 05/03/2005 |
| 6878784 | Polymer composition for pipes 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... | 04/12/2005 |
| 6867277 | Ethylene-based polymer resin An ethylene-based polymer resin which is obtained by copolymerizing ethylene with an α-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 l... | 03/15/2005 |
| 6864332 | Process for the gas phase polymerization and copolymerization of olefin monomers 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... | 03/08/2005 |
| 6858681 | Process for producing olefinic polymer 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 cy... | 02/22/2005 |
| 6841643 | Additive for communication cable filler and filler for communication cable The additive (b) for a communication cable filler according to the present invention contains as a main component an ethylene/α-olefin copolymer (a) having a number-average molecular weight (Mn), measured by GPC, of 500 to 5,000 and having a crystallizing temperatu... | 01/11/2005 |
| 6812314 | Thermally responsive polymer materials and uses thereof 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 art... | 11/02/2004 |
| 6800704 | Olefin polymerization process with alkyl-substituted metallocenes 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 π-bonded ring having a C3 or greater hydro... | 10/05/2004 |
| 6800711 | Olefin-based polymer 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 thos... | 10/05/2004 |
| 6794476 | Propylene homopolymer and propylene copolymer 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 tempe... | 09/21/2004 |
| 6753387 | Temperature controlling system for olefin polymerization reactors 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 reacto... | 06/22/2004 |
| 6747113 | Silica supported transition metal catalyst A polymer produced by a transition metal containing catalyst useful for the polymerization of α-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 ... | 06/08/2004 |
| 6743858 | Sterilized cyanoacrylate solutions containing thickeners 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 t... | 06/01/2004 |
| 6716936 | Cascaded boiling pool slurry reactors for producing bimodal low to medium density polyethylene polymers 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,... | 04/06/2004 |
| 6677395 | Irradiated, oxidized olefin polymer dispersing agents Irradiated, oxidized olefin polymer dispersing aids for use in the manufacture of additive concentrates and additive-containing olefin polymer compositions.... | 01/13/2004 |
