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| Number | Title | Issue Date |
| 7868105 | Polymerization methods using the catalysts Provided is a method of preparing a cyclic olefin polymer by addition polymerization of a cyclic olefin monomer, the method including contacting a metal catalyst complex represented by Formula 1 below with a cyclic olefin monomer represented by Formula 2 below: ... | 01/11/2011 |
| 7754834 | Bulk density promoting agents in a gas-phase polymerization process to achieve a bulk particle density Disclosed herein is a gas phase polymerization process including the steps of passing a recycle stream through a fluidized bed in a gas phase fluidized bed reactor in the presence of a bulk density promoting agent, wherein the bulk density promoting agent is of a sa... | 07/13/2010 |
| 7737233 | Catalyst systems and their use for metathesis reactions Novel catalyst systems for metathesis reactions, in particular for the metathesis of nitrile rubber, which contain a specific salt additive in addition to the metathesis catalyst are provided. ... | 06/15/2010 |
| 7375169 | Method for catalyst preparation and improved polyethylene blow molding resin A method for polymerizing ethylene is provided. The method can include preparing a supported catalyst composition comprising the steps of: (a) dehydrating a chromium impregnated support; (b) at least partially dissolving a titanium-containing compound in one or more... | 05/20/2008 |
| 7329769 | Catalytic boronate ester synthesis from boron reagents and hydrocarbons A process for producing a ring-substituted arene borane which comprises reacting a ring-substituted arene with an HB organic compound in the presence of a catalytically effective amount of an iridium or rhodium complex with three or more substituents, excluding hydr... | 02/12/2008 |
| 7323526 | Supported metallocene-alkyl catalyst composition A supported catalyst composition having improved flow properties is disclosed comprising an alkylalumoxane, a metallocene-alkyl an inorganic oxide support having an average particle size of from 0.1 to 50 μm and calcined at a temperature greater than 600° C., and ... | 01/29/2008 |
| 7312283 | Polymerization catalysts and process for producing bimodal polymers in a single reactor Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. Methods for preparing and using such catalysts to produce polyolefins are also provided. The compositions... | 12/25/2007 |
| 7309747 | Highly flowable 1-butene polymer and process for producing the same A 1-butene polymer satisfying the following (1), (2) and either (3) or (3′): a process for producing the polymer; a resin modifier comprising the polymer; and a hot-melt adhesive containing the polymer. (1) The intrinsic viscosity [η] as measured in tetralin solv... | 12/18/2007 |
| 7309741 | Polyolefin blends and pipe A polyolefin blend comprising: (a) from 30 to 80 weight % of a low molecular weight copolymer comprising from 85 to 100 weight % of ethylene and from 15 to 0 weight % of one or more C4-8 alpha olefins having a density fr... | 12/18/2007 |
| 7309522 | Fibers made from block copolymer The present invention relates to compositions such as fibers, elastic yarns, wovens, nonwovens, knitted fabrics, fine nets, and articles produced at least in part from a styrenic block copolymer comprising at least two blocks produced from vinyl aromatic monomers an... | 12/18/2007 |
| 7300988 | Single catalyst low, medium and high density polyethylenes A method of polymerizing olefins comprising combining in one embodiment ethylene and optionally one or more α-olefins with a catalyst composition in a continuous polymerization reactor at a pressure of less than 10,000 kPa; wherein the catalyst composition comprise... | 11/27/2007 |
| 7285608 | Metallocene ligands, metallocene compounds and metallocene catalysts, their synthesis and their use for the polymerization of olefins A catalyst system includes a metallocene compound having the formula R9 L1 L2 M1 R1 R2 wherein R9 is a bridge between ligands L1 and L2 and M1 is a metal of... | 10/23/2007 |
| 7273914 | Olefin polymerization methods Methods for making polyolefins are disclosed. One method comprises polymerizing an olefin in the presence of a catalyst system comprising a single-site complex, an agglomerated metal oxide/clay support-activator, and an ionic borate. Including an ionic borate with t... | 09/25/2007 |
| 7268194 | Continuous slurry polymerization process and apparatus A process of converting a loop reactor into multiple loop reactors comprising starting with a loop reactor comprising at least 8 vertical legs, at least two non-vertical conversion runs, each non-vertical run connected in fluid flow communication with two vertical l... | 09/11/2007 |
| 7259215 | Process for producing propylene/ethylene block copolymer and propylene/ethylene block copolymer A process for producing a propylene-ethylene block copolymer in a good morphology using a catalyst system comprising a metallocene catalyst (1) preparing high crystalline polypropylene, a metallocene catalyst (2) preparing low crystalline polypropylene, a porous car... | 08/21/2007 |
| 7256243 | Silicon compound The present invention provides a novel silicon compound represented by Formula (1) having a living radical polymerization initiating ability for addition-polymerizable monomers and a polymer obtained using the same. The above polymer can provide an organic-inorganic... | 08/14/2007 |
| 7250478 | Silicon containing cyclopentadienyl ring for metallocene catalyst components The present invention refers to a metallocene catalyst component for producing polyolefins according to formula (I) R″s (CpRn)g (CpRn) M Q3-g (I) or according to formula (II) R″(CpRn)MeXQ (II) whe... | 07/31/2007 |
| 7250470 | Crystallization of polypropylene using a semi-crystalline, branched or coupled nucleating agent A method of nucleating a propylene homo- or copolymer, the method comprising contacting the propylene polymer with a semi-crystalline branched or coupled polymeric nucleating agent under nucleation conditions. In one embodiment, the propylene homopolymer is characte... | 07/31/2007 |
| 7250471 | Impact resistance polymer blends of crystalline polypropylene and partially crystalline, low molecular weight impact modifiers Polymer blends that exhibit good impact resistance comprise a crystalline polypropylene matrix and a partly crystalline copolymer impact modifier with a molecular weight lower than that of the matrix polymer. The matrix polymer can comprise any crystalline propylene... | 07/31/2007 |
| 7247595 | Supported metallocene catalyst and olefin polymerization using the same A metallocene compound represented by the following Chemical Formula 1: wherein M is a transition metal of Group 4; Cp denotes a cyclopentadienyl ring unsubstituted or su... | 07/24/2007 |
| 7244795 | Polymerization process using metallocene catalyst systems The present invention relates to a polymerization process using improved metallocene catalyst systems. Specifically, the catalyst systems of the present invention relate to a metallocene compound having optimized metals loading and activator concentration, and demon... | 07/17/2007 |
| 7241849 | Group III bridged metallocene based on cyclopentadienyl-fluorenyl ligands The present invention discloses a metallocene catalyst component of formula (Flu-R″-Cp)M(η3-C3R′5)(ether)n (I) wherein Cp is a cyclopentadienyl, substituted or unsubstituted, Flu is a fluorenyl, substituted or unsubst... | 07/10/2007 |
| 7238758 | Catalysts for polymerization or copolymerization of α-olefins, catalyst components thereof, and processes for polymerization of α-olefins with the catalysts The invention has an object to provide a catalyst for polymerizing or copolymerizing an α-olefin, catalyst constituent thereof, and method of polymerizing α-olefins with the catalyst, for production of α-olefin polymers or copolymers with high hydrogen response, ... | 07/03/2007 |
| 7227040 | Process for forming branched composition catalytically by carbon-hydrogen bond activation in a saturated moiety A branched composition can be formed by reacting a reagent containing a saturated hydrocarbon moiety in the presence of (a) a catalyst capable of activating a carbon-hydrogen bond therein and (b) a branching reagent having a moiety that binds to the carbon atom in t... | 06/05/2007 |
| 7223825 | Single catalyst low, medium and high density polyethylenes A method of polymerizing olefins comprising combining in one embodiment ethylene and optionally one or more α-olefins with a catalyst composition in a continuous polymerization reactor at a pressure of less than 10,000 kPa; wherein the catalyst composition comprise... | 05/29/2007 |
| 7217463 | Machine direction oriented polymeric films and methods of making the same This invention relates to a film comprising a machine direction oriented polymeric film prepared from (A) at least one propylene homopolymer or copolymer or lend of two or more thereof, wherein (A) has a melt flow rate from about 6 to about 30 and (B) an olefin elas... | 05/15/2007 |
| 7214745 | Process for producing polymer A process for producing an olefin polymer with high polymerization activity without using an expensive co-catalyst or using a limited amount of the co-catalyst, more particularly a process for producing a high molecular weight (co)polymer with high polymerization ac... | 05/08/2007 |
| 7214747 | Phosphorus substituted metallocene compounds for olefin polymerization This invention relates to a metallocene compounds represented by formula: wherein M is a group 3, 4, 5 or 6 transition metal atom, or a lanthanide metal atom, or actinide metal atom; E i... | 05/08/2007 |
| 7211613 | Hydrophobically modified clay polymer nanocomposites The present invention is directed, in part, to improved nanocomposite compositions and processes for preparing same. Specifically, in one embodiment, there is provided a process for preparing an aqueous nanocomposite dispersion, wherein the process comprises: polyme... | 05/01/2007 |
| 7205371 | Blends made from propylene ethylene polymers Polymer blend compositions of a first polymer component comprising an ethylene propylene copolymer and a second polymer component comprising an isotactic polypropylene copolymer. The first polymer component has a uniform distribution of both tacticity and comonomer ... | 04/17/2007 |
| 7202305 | 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... | 04/10/2007 |
| 7202313 | Chromium-based catalysts in mineral oil for production of polyethylene A process for polymerizing polyethylene with chromium-based catalysts wherein one or more supported chromium-based catalysts is mixed with mineral oil to form a slurry and the slurry is then introduced into a polymerization reactor, especially a gas-phase polymeriza... | 04/10/2007 |
| 7202190 | Supported catalyst system for the polymerization of olefins A supported catalyst system for polymerizing olefins comprising a) a support, b) a Lewis base of the formula M3R6R7R8 (I) wherein M3 is an element... | 04/10/2007 |
| 7199202 | Propylene polymer and composition containing the same, molded object and laminate comprising these, and processes for producing propylene polymer and composition containing the same A propylenic polymer according to the present invention or a composition thereof have an excellent melt flowability and contains a less amount of stickiness-causing components, and also has a low modulus and is pliable, and is capable of providing a transparent mold... | 04/03/2007 |
| 7199203 | Isotactic propylene copolymer fibers, their preparation and use Fibers comprising a propylene homopolymer or a copolymer of propylene and at least one of ethylene and one or more unsaturated comonomers exhibit desirable properties. The homopolymers are characterized as having 13C NMR peaks corresponding to a regio-err... | 04/03/2007 |
| 7196152 | Modified Ziegler catalyst, process for preparing it and process for preparing poly-1-olefins in its presence The invention relates to a modified Ziegler catalyst for preparing a poly-1-olefin in suspension, in solution or in the gas phase, which catalyst comprises the reaction product of a magnesium alkoxide (component a) with a transition metal compound (component b) and ... | 03/27/2007 |
| 7193024 | Alpha-Olefin based branched polymer A polymer comprising units (1) derived from an alpha-olefin having at least 3 carbon atoms (1′), units (2) derived from divinylbenzene or C1-10hydrocarbyl substituted derivatives thereof (2′), and units (3) derived f... | 03/20/2007 |
| 7193016 | Epoxy-extended polyacrylate toughening agent In accordance with the present invention, there are provided toughening agents which are useful for improving the performance properties of epoxy-based adhesive formulations. For example, epoxidized polybutylacrylates have been found to be useful toughening agents o... | 03/20/2007 |
| 7193099 | Racemoselective preparation of isolable ansa-metallocene biphenoxide complexes The invention relates to a process for preparing racemic metallocene biphenoxide complexes by reacting bridged transition metal complexes with cyclopentadienyl derivatives of alkali metals or alkaline earth metals and heating the reaction mixture obtained in this wa... | 03/20/2007 |
| 7189789 | Curable fluoropolyether composition and rubber article A curable fluoropolyether composition comprising (A) a fluoropolyether compound containing alkenyl radicals and having a fluorine content of at least 40% by weight, (B) a curing agent in the form of a fluorinated organosilicon compound which is fully soluble in the ... | 03/13/2007 |
